A gasket (28) has: an annular part (31) that abuts the bottom surface of a sealing body (17); a bottom part (32) that is positioned closer than the annular part (31) to an electrode body (14) and that presses the electrode body (14); and a coupling part (33) that couples the annular part (31) and the bottom part (32) and that inclines towards the center in the radial direction with proximity to the bottom part (32). The bottom part (32) is provided with a first through hole (41) that is positioned so as to include the center in the radial direction, and a plurality of second through holes (42) that are positioned at a peripheral part.
H01M 50/184 - Sealing members characterised by their shape or structure
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/14 - Primary casings, jackets or wrappings of a single cell or a single battery for protecting against damage caused by external factors
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
H01M 50/186 - Sealing members characterised by the disposition of the sealing members
H01M 50/474 - Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their position inside the cells
H01M 50/477 - Spacing elements inside cells other than separators, membranes or diaphragms; Manufacturing processes thereof characterised by their shape
A cylindrical secondary battery according to the present invention comprises a band-like core body and active material mixture layers that are formed on both surfaces of the core body, while having a wound body that is obtained by winding an electrode plate which is electrically connected to the core body by arranging a metal tab for current collection in an exposed part where the core body is exposed. The active material mixture layer is interposed between the core body and at least a part of an end of the metal tab for current collection in the width direction.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 10/04 - Construction or manufacture in general
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
With respect to a nonaqueous electrolyte secondary battery according to one embodiment of the present invention, a positive electrode comprises a mixture layer that contains first composite oxide particles, which are non-agglomerated particles having a volume-based median diameter of 2 µm to 20 µm, and second composite oxide particles, which are secondary particles each are composed of agglomerated primary particles having an average particle diameter of 50 nm to 5 µm. The mixture layer has: first regions which extend from both edges of the mixture layer in the width direction in a length that exceeds 10% of the total width of the mixture layer; and a second region that is sandwiched between the first regions. More second composite oxide particles are contained in the first regions than the first composite oxide particles. More first composite oxide particles are contained in the second region than the second composite oxide particles.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
4.
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
111111112222222) of metal elements excluding Li is 0.984-1.004 inclusive. The mixing ratio of the first positive electrode active material to the second positive electrode active material is 95:5 to 75:25 by mass ratio.
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
This nonaqueous electrolyte secondary battery positive electrode according to one embodiment comprises a positive electrode mixture layer that contains, as positive electrode active materials, first lithium-containing transition metal composite oxide particles, which are non-aggregated particles having a volume-based median diameter of 2-10 μm, and second lithium-containing transition metal composite oxide particles, which are secondary particles having a volume-based median diameter of 10-30 μm and formed by the agglomeration of primary particles having an average particle diameter of 50 nm-2 μm, and that has a first layer formed on the positive electrode core material side and a second layer formed on the first layer. The first layer contains at least the first composite oxide particles, and the content of said composite oxide particles is 80% or more relative to the total mass of the positive electrode active materials contained in the first layer. The second layer contains at least the second composite oxide particles.
This wiring board includes a patterned metal plate obtained by cutting a metal plate into a wiring pattern provided with a plurality of lead lines having connection portions, and an insulating layer laminated on the surface of the patterned metal plate, wherein the insulating layer is provided with exposure openings exposing the connections. A method for manufacturing the wiring board includes a cutting step for cutting a metal plate, connecting a plurality of lead lines at connecting portions to form a patterned metal plate having a wiring pattern in which adjacent lead lines are connected, a lamination step for bonding an insulating material to the surface of the patterned metal plate to produce an intermediate substrate in which the insulating layer is laminated on the surface of the patterned metal plate, and a correction step for locally removing the intermediate substrate in a removal area including the connection portions to cut off the lead lines.
H05K 3/20 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern by affixing prefabricated conductor pattern
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/262 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
H01M 50/264 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks for cells or batteries, e.g. straps, tie rods or peripheral frames
H01M 50/271 - Lids or covers for the racks or secondary casings
H01M 50/284 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
H01M 50/287 - Fixing of circuit boards to lids or covers
H01M 50/291 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
H01M 50/507 - Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
H01M 50/519 - Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising printed circuit boards [PCB]
H01M 50/569 - Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
7.
POWER SOURCE DEVICE AND METHOD FOR MANUFACTURING SAME
This power source device comprises: a plurality of battery blocks in which a plurality of holder through holes are formed; a plurality of shaft parts respectively inserted in the holder through holes in a state in which the plurality of battery blocks are connected in a connecting direction in an orientation in which the holder through holes are aligned; a cylindrical exterior case that is open at both ends and that houses the battery blocks; a first lid that closes a first open end of the exterior case; and a second lid that closes a second open end of the exterior case. Each of the plurality of shaft parts has a screw thread formed at least at the tip, and the first lid is configured to be secured by the screw thread formed at the tip of each shaft part in a state in which the plurality of shaft parts are inserted through a core block that connects the plurality of battery blocks.
H01M 50/262 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/24 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
H01M 50/284 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
Provided is a cylindrical battery that has improved safety and also suppresses deformation of a bottom part. According to one aspect of the present disclosure, a cylindrical battery comprises an electrode body, an electrolyte, an outer can that is a bottomed cylinder that houses the electrode body and the electrolyte, and a sealing body that closes an opening part of the outer can. A bottom part of the outer can has a first groove that forms a polygon and a plurality of second grooves that respectively extend from the plurality of vertices of the polygon toward the outside.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
Provided is a non-aqueous electrolyte secondary battery that has improved cycle characteristics and has high capacity. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises: a positive electrode; a negative electrode; a separator that isolates the positive electrode and the negative electrode from each other; and a non-aqueous electrolyte. The positive electrode includes a positive electrode current collector, a first positive electrode mixture layer formed on the surface of the positive electrode current collector, and a second positive electrode mixture layer formed on the surface of the first positive electrode mixture layer. The second positive electrode mixture layer includes a second conductive agent having an average particle diameter of 0.5-15 μm. The first positive electrode mixture layer includes a first conductive agent having an average particle diameter smaller than the average particle diameter of the second conductive agent.
In the present invention, an insulative tape (50) is disposed so as to cover a positive electrode lead (20) and a positive electrode mix layer (62). The thickness of a first opposing section (71), of the insulative tape (50), which faces the positive electrode lead (20) is configured to be thinner than the thickness of a second opposing section (72), of the insulative tape (50), which faces the positive electrode mix layer (62). The second opposing section (72) includes a substrate layer (81) and an adhesive layer (82). The first opposing section (71) may be configured so as not to have the adhesive layer (82).
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/531 - Electrode connections inside a battery casing
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
The present invention provides a nonaqueous electrolyte secondary battery which has excellent safety and excellent battery characteristics. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with a positive electrode, a negative electrode, a separator that separates the positive electrode and the negative electrode from each other, and a nonaqueous electrolyte. With respect to this nonaqueous electrolyte secondary battery, the positive electrode comprises a positive electrode collector, a first positive electrode mixture layer that is formed on the surface of the positive electrode collector, and a second positive electrode mixture layer that is formed on the surface of the first positive electrode mixture layer; the first positive electrode mixture layer contains a first positive electrode active material; the second positive electrode mixture layer contains a second positive electrode active material; and the Ni content ratio in the second positive electrode active material is lower than the Ni content ratio in the first positive electrode active material.
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
12.
NEGATIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
This negative electrode active material for a nonaqueous electrolyte secondary battery is characterized: by comprising a silicate-containing complex (10) having a carbon phase (12) and a plurality of Si-containing silicate particles (14) dispersed in the carbon phase (12); and in that the Si-containing silicate particles (14) each have a silicate phase and a plurality of silicon particles dispersed in the silicate phase, and the ratio (B/A) of the average particle diameter (B) of the silicate-containing complex (10) with respect to the average particle diameter (A) of the Si-containing silicate particles (14) is 15-120 inclusive.
This cylindrical battery (10) comprises: an electrode body in which a long positive electrode and a long negative electrode are wound with a separator therebetween; and a bottomed cylindrical exterior can (16) which accommodates the electrode body. The exterior can (16) includes a cylindrical porous metal section (51) composed of a porous metal. The exterior can (16) may comprise a dense metal section (53) which is disposed inside the porous metal section (51) and is composed of a dense metal.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/124 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by the material having a layered structure
H01M 50/131 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by physical properties, e.g. gas-permeability or size
This battery manufacturing method includes: preparation of a wound-type electrode group 2 formed by laminating and winding separators and electrode plates such that the electrode group 2 has recessed parts 70 in first regions R1, which continue from an inner edge at one end in an axial direction E, electrode plates being shorter at the recessed parts 70 than in second regions R2 positioned on the outer side of the first regions R1; bending of end parts of the electrode plates in the second regions R2 in a radial direction B of the electrode group 2; joining of the bent end parts with a collector plate; insertion of the electrode group 2 joined with the collector plate into an exterior can 4 so that the collector plate and a bottom surface of the exterior can 4 face each other; insertion of a press jig 72 into a center space of the electrode group 2; and pressing of the collector plate against the bottom surface to join the collector plate with the exterior can 4.
H01M 10/0525 - Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
This battery is provided with: a wound electrode group 2 wherein a separator and electrode plates are stacked and wound; and a collector plate. The electrode group 2 has a bonding region in which end parts of a plurality of electrode plates that are arranged in a radial direction B are bend in the radial direction B, and the plurality of bent end parts are bonded to the collector plate. The bonding region is sandwiched between two non-bonding regions 50 that are arranged in the circumferential direction of the electrode group 2; and a first boundary part 52, which is the boundary between the bonding region and one non-bonding region 50, and a second boundary part 54, which is the boundary between the bonding region and the other non-bonding region 50, extend substantially parallel to a specific virtual line L that passes through the winding center C of the electrode group 2 and the bonding region.
A non-aqueous electrolyte secondary battery is provided which enables improving charge/discharge cycle characteristics. This non-aqueous electrolyte secondary battery is provided with an electrode body which comprises a first electrode and a second electrode with mutually different polarities that face each other across from a separator, and a battery case which houses the electrode body. The first electrode has a mixed layer that contains a conductive agent, and, used in a state in which a non-aqueous electrolyte secondary battery is fixed, the mixed layer has a first region on the upper side in the vertical direction and a second region on the lower side in the vertical direction; the void ratio of the mixed layer in the first region is higher than the void ratio of the mixed layer in the second region, and the conductive agent content ratio in the first region is lower than the conductive agent content ratio in the second region; and the conductive agent contained in the first region contains fibrous carbon and the conductive agent contained in the second region contains granular carbon.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure is provided with: an electrode body which is obtained by winding a positive electrode and a negative electrode, with a separator being interposed therebetween; and a nonaqueous electrolyte solution. This nonaqueous electrolyte secondary battery is characterized in that: the negative electrode (12) comprises a negative electrode collector (30) and a negative electrode mixture layer (32) that is arranged on the negative electrode collector (30), while containing an Si-based material; the negative electrode mixture layer (32) comprises a pair of end-part mixture layers (34) which are arranged on both ends in the width direction D2 that is perpendicular to the winding direction D1 and a center-part mixture layer (36) which is sandwiched between the pair of end-part mixture layers (34); and the average particle diameter of the Si-based material in the pair of end-part mixture layers (34) is larger than the average particle diameter of the Si-based material in the center-part mixture layer (36).
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 4/36 - Selection of substances as active materials, active masses, active liquids
H01M 4/38 - Selection of substances as active materials, active masses, active liquids of elements or alloys
H01M 4/48 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
In a negative electrode for a secondary battery that is an example of an embodiment, a mixture layer contains graphite particles, and has a lower layer arranged on the core body side of the mixture layer and an upper layer arranged on the surface of the mixture layer. The average thickness of the upper layer is 5% or less than the average thickness of the mixture layer. The volume-based median diameter of graphite particles contained in the lower layer exceeds 10 µm, and the volume-based median diameter of graphite particles contained in the upper layer is 4 µm or greater and 10 µm or less. The BET specific surface area of the graphite particles contained in the lower layer exceeds 4.0 m2/g, and the BET specific surface area of the graphite particles contained in the upper layer is 2.0 m2/g or greater and 4.0 m2/g or less.
Provided is a non-aqueous electrolyte secondary battery in which micro-short circuits are suppressed while charge and discharge cycle characteristics are improved. A non-aqueous electrolyte secondary battery according to one aspect of the present disclosure comprises a positive electrode, a negative electrode, a separator separating the positive electrode and the negative electrode from each other, and a non-aqueous electrolyte. The positive electrode comprises a positive electrode current collector and a positive electrode mixture layer formed on a surface of the positive electrode current collector. The positive electrode mixture layer includes a first positive electrode mixture layer opposing the positive electrode current collector, and a second positive electrode mixture layer laminated on the surface of the first positive electrode mixture layer, and at least, the first positive electrode mixture layer contains fibrous carbon, and the second positive electrode mixture layer does not contain fibrous carbon having an average fiber length equal to or greater than the thickness of the second positive electrode mixture layer.
Provided is a non-aqueous electrolyte secondary battery that has improved cycle characteristics. A non-aqueous electrolyte secondary battery, which is one aspect of the present disclosure, comprises: a wound electrode body in which a positive electrode and a negative electrode are wound, with a first separator that is disposed on the winding inner side of the positive electrode and a second separator that is disposed on the winding outer side of the positive electrode being interposed therebetween; an electrolytic solution; and an exterior body which accommodates the electrode body and the electrolytic solution, wherein the first separator has a first base material layer and a first coating layer that is formed on the surface of the first base material layer which faces the positive electrode, the second separator has a second base material layer and a second coating layer that is formed on the surface of the second base material layer which faces the positive electrode, the first coating layer and the second coating layer each include a filler and an organic material, and the content of the filler in the first coating layer is higher than the content of the filler in the second coating layer.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/446 - Composite material consisting of a mixture of organic and inorganic materials
H01M 50/451 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
H01M 50/46 - Separators, membranes or diaphragms characterised by their combination with electrodes
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
21.
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Provided are a nonaqueous electrolyte secondary battery whereby damage to electrode bodies is suppressed and a production method therefor. The nonaqueous electrolyte secondary battery according to an embodiment of the present invention is provided with: an electrode body in which a first electrode and a second electrode that have different polarities are wound with a separator interposed therebetween; a nonaqueous electrolyte; an exterior can that houses the electrode body and the nonaqueous electrolyte, the exterior can being shaped as a bottomed cylinder; and a sealing body for sealing the opening of the exterior can. The first electrode has a core, a mixture layer formed on at least part of the surface of the core, and an exposed section of the core provided on one end on one side of the electrode body in the winding-axis direction. The exposed section has: an easily deformable section formed along the winding-axis direction of the electrode body; and an end surface section formed by the exposed section being curved along the easily deformable section, said end surface section being disposed on one end surface in the winding of the electrode body. The end section is joined to a current collector and the current collector is connected to the exterior can or the sealing body.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
22.
CYLINDRICAL BATTERY AND METHOD FOR MANUFACTURING CYLINDRICAL BATTERY
Provided is a cylindrical battery in which the connection between a current collector and a core body is stabilized while suppressing damage to an electrode body. In the cylindrical battery 10, a negative electrode 12 has a core body and a mixture layer 12b laminated on at least a portion of the surface of the core body, and has a protrusion part 12a in which the core body protrudes from one end face of an electrode body 14 in a winding axis direction; the protrusion part 12a includes a welded region disposed, in a substantially constant width, along the radial direction of the electrode body, and a non-welded region adjacent to the welded region; the protrusion part in the welded region has, at both ends in the width direction, projections projecting from a central portion; the projections project from the protrusion part in the non-welded region; the protrusion part 12a in the welded region is welded to a lower current collector 17; and the lower current collector 17 is connected to an outer can 15.
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
A cylindrical battery exemplifying one embodiment comprises an electrode body, a bottomed cylindrical external can that accommodates the electrode body, a sealing body that blocks an opening of the external can, a gasket that is interposed between the external can and the sealing body, and an external terminal plate that is joined to the outer surface of the external can. The external terminal plate is a metal plate having a thick portion and a thin portion, and the thin portion is joined to an open edge of the external can.
H01M 50/55 - Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
H01M 50/184 - Sealing members characterised by their shape or structure
H01M 50/188 - Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
H01M 50/547 - Terminals characterised by the disposition of the terminals on the cells
H01M 50/559 - Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
H01M 50/588 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
24.
COLLECTOR PLATE AND POWER STORAGE DEVICE USING SAME
This collector plate is plate-shaped and includes: a first main surface; and a second main surface located on the side opposite the first main surface. The collector plate further includes: a first part at the center thereof; a plurality of second parts extending in first directions away from the first part; and a plurality of third parts extending from portions of the second parts, such portions being spaced apart from the first part, and the third parts protrude in second directions that cross the first directions. With regard to two second parts adjacent to each other, there is a gap formed between a third part extending from one of the second parts and a third part extending from the other second part.
H01G 11/82 - Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
A cylindrical battery (10) comprises an electrode body (14) in which a long positive electrode (11) having a plurality of positive electrode lead portions (20) and a long negative electrode (12) are wound with a separator (13) therebetween, a bottomed cylindrical external can (16) that accommodates the electrode body (14), and a sealing body (17) which is crimp fixed to an opening of the external can (16). The sealing body (17) has a sealing plate (27) and a current collector plate (40) having a through-hole, and the plurality of positive electrode lead portions (20) pass through the through-hole in the current collector plate (40) and are bent and joined above the current collector plate (40).
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
H01M 50/167 - Lids or covers characterised by the methods of assembling casings with lids by crimping
H01M 50/179 - Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells having curved cross-section, e.g. round or elliptic
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
A cylindrical battery (10) comprises: a wound electrode body (14) having a hollow section (14a) extending in the axial direction; and collector plates (18,19), each collector plate including a protrusion (56, 66) having an apex (56a, 66a) accommodated in the hollow section (14a), and a groove part (57, 67) provided integrally with the protrusion (56, 66) on the outside in the radial direction of the protrusion (56, 66) so as to define a groove (57a, 67a), the collector plates being provided more toward the outside in the axial direction than the electrode body (14). In a core body of at least one of a positive electrode (11) and a negative electrode (12), a core body exposed portion (31, 41) in which a mixture layer is not provided is joined to a core body joining portion (an upper surface (51b) of a ridge part (51a), and a lower surface (61c) of a ridge part (61a)) of the collector plate (18, 19). The core body joining portion includes an opposing part (61d) that radially opposes an integral structure (52, 62) comprising the protrusion (56, 66) and the groove part (57, 67).
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/531 - Electrode connections inside a battery casing
H01M 50/536 - Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
H01M 50/545 - Terminals formed by the casing of the cells
A non-aqueous electrolyte secondary battery (10) includes an electrode body (14) in which a positive electrode (11) and a negative electrode (12) face each other across a separator (13), and a battery case (15) that accommodates the electrode body (14). The positive electrode (11) includes a positive electrode composite material layer containing a binder, and the negative electrode (12) includes a negative electrode composite material layer containing a binder. The non-aqueous electrolyte secondary battery (10) is characterized in that, in a case of use thereof in a fixed state, and the electrode body (14) is equally divided into two of an upper half region and a lower half region with respect to a vertical direction in this fixed state, a swelling degree with an electrolyte is higher for the binder disposed in the upper half region than a swelling degree with the electrolyte for the binder disposed in the lower half region, in at least one of the positive electrode (11) and the negative electrode (12).
A non-aqueous electrolyte secondary battery (10) is characterized in that: an electrode body (14) in which a positive electrode (11) and a negative electrode (12) oppose each other through a separator (13), and a battery case (15) accommodating the electrode body (14), are provided; the negative electrode (12) has a negative electrode mixture layer containing first carbon particles and second carbon particles having a lower internal porosity than the first carbon particles; the non-aqueous electrolyte secondary battery (10) is used in a fixed state; and when the electrode body (14) in the fixed state is bisected into a top half region and a bottom half region with respect to the vertical direction, the second carbon particles are contained in greater number in the top half region than the bottom half region.
This battery module comprises an assembled battery (4) in which a plurality of battery blocks (3) are connected in an axial direction of a plurality of cylindrical batteries (1), which are provided in each of the battery blocks (3) with bottom surfaces (11a) disposed on one and the same plane. The assembled battery (4) is provided with a cooling plate (5) for cooling the cylindrical batteries (1). Each of the battery blocks (3) has one end surface providing a cooling surface (3A) on which the bottom surfaces (11a) of the cylindrical batteries (1) are disposed, and another end surface providing a discharge surface (3B) on which opening portions (13) of discharge valves of the cylindrical batteries (1) are disposed. The assembled battery (4) has a duct gap (6) between adjacent battery blocks (3) for a discharged product. The cooling surface (3A) and the discharge surface (3B) are disposed on opposite surfaces of the duct gap (6). The cooling plate (5) has an L-shape in which a heat-absorption plate portion (5A) and a heat-dissipating plate portion (5B) are connected. The heat-absorption plate portion (5A) is stacked in a thermally coupled state on the cooling surface (3A). The heat-dissipating plate portion (5B) is disposed on an outer surface of the assembled battery (4). The duct gap (6) is located between the heat-absorption plate portion (5A) and the discharge surface (3B) of the battery blocks (3).
A sealed battery that is an example of an embodiment comprises: an electrode body; an outer can that houses the electrode body; and a seal body that closes an opening of the outer can. The seal body includes: a cap; and a current collector plate that is located closer to the electrode body than the cap and that is welded to the cap. The current collector plate has, in a portion thereof welded to the cap, a recess protruding toward the cap.
A cylindrical battery according to an embodiment comprises an electrode body, a bottomed cylindrical exterior can, and a sealing body. The cylindrical battery further comprises: an electrode lead which extends from a position facing a groove section of the exterior can on the outer circumferential side of the electrode body, and directly connects a first electrode and a current collecting plate of the sealing body; and an upper insulating plate. The upper insulating plate includes: a first insulating plate; and a second insulating plate which is disposed closer to the sealing body side than the first insulating plate and is interposed between the groove section and the electrode lead. The electrode lead is bent in the direction of the center axis of the electrode body, and at least a part of the electrode is sandwiched between the first insulating plate and the second insulating plate.
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
H01M 10/04 - Construction or manufacture in general
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
Provided is a non-aqueous electrolyte secondary battery in which the positions of a plurality of exposed parts are controlled so that it is possible to connect a plurality of tabs to predetermined positions in accordance with a thickness variation of electrodes. A non-aqueous electrolyte secondary battery according to one aspect of the present disclosure comprises: an electrode body in which a positive electrode and a negative electrode are wound with a separator therebetween; an electrolyte; and a cylindrical outer can which accommodates the electrode body and the electrolyte, wherein the positive electrode has a current collector and a mixed layer laminated on at least a portion of the surface of the current collector, a plurality of exposed parts where the current collector is exposed are formed on the surface of the positive electrode, tabs are connected to the respective exposed parts, and when the rotation angle of the electrode body from a winding start-side end to a winding finish-side end of the exposed parts relative to the winding center is defined as an exposed part angle, the exposed part angle of the exposed parts positioned on the winding start side is greater than the exposed part angle of the exposed parts positioned on the winding finish side.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
The present invention provides a non-aqueous electrolyte secondary battery that makes it possible to obtain improved productivity while reducing electrode plate deformation. A non-aqueous electrolyte secondary battery according to the present disclosure comprises: an electrode body in which a positive electrode and a negative electrode are wound via a separator therebetween; a non-aqueous electrolyte; and an outer case in which the electrode body and the non-aqueous electrolyte are contained. The positive electrode includes a positive electrode current collector, and a positive electrode mixture layer formed on a surface of the positive electrode current collector. The surface of the separator opposite the positive electrode mixture layer includes a high friction region formed in an area of less than six turns in a winding direction from a position opposite the winding inner end of the positive electrode mixture layer, and a low friction region adjacent to the high friction region.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/451 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
H01M 50/46 - Separators, membranes or diaphragms characterised by their combination with electrodes
H01M 50/463 - Separators, membranes or diaphragms characterised by their shape
Provided is a non-aqueous electrolyte secondary battery that has improved cycle characteristics. According to one aspect of the present disclosure, a non-aqueous electrolyte secondary battery comprises: an electrode body that includes a positive electrode and a negative electrode; and a packaging body that houses the electrode body and a non-aqueous electrolyte. The negative electrode includes a negative electrode collector and a negative electrode mixture layer that is formed on the surface of the negative electrode collector. The negative electrode mixture layer contains: a negative electrode active material that includes a carbon-based active material and a silicon-based active material; and carbon nanotubes. The G/D ratio obtained by Raman spectroscopy of the carbon nanotubes is 40–130.
The present invention reduces the size but maintains the safety of a power supply device in which end surfaces of secondary battery cells are opposite each other. A power supply device (100) that comprises: a plurality of battery cells (1) that comprise a discharge valve (3) that discharges gas when internal pressure rises; a plurality of battery blocks (10) that hold the plurality of battery cells (1) such that outer cans (2) are parallel and end surfaces of the outer cans (2) are in the same plane, the battery blocks (10) being arranged such that block surfaces of neighboring battery blocks (10) are opposite each other across an insulation space (30); shielding plates (40) that are arranged in the insulation spaces (30); and support members (50) that are provided further to the inside than outer peripheral parts of opposite block surfaces of the battery blocks (10) and support the shielding plates (40). As supported by the support members (50), the shielding plates (40) have outer peripheral parts that are displaceable free ends (42) relative to the support members (50) as base points.
H01M 50/35 - Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
H01M 50/204 - Racks, modules or packs for multiple batteries or multiple cells
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/291 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by their shape
H01M 50/293 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs characterised by the material
A non-aqueous electrolyte secondary battery according to one embodiment of the present invention is provided with a positive electrode, a negative electrode, a non-aqueous electrolyte and a cladding. The cladding has a safety mechanism which operates when the internal pressure reaches a predetermined value. The positive electrode includes a positive electrode core and a positive electrode mixture layer formed on the positive electrode core. The positive electrode mixture layer includes a positive electrode active material, and 0.05-2 mass % of lithium carbonate relative to the mass of the positive electrode active material, and the lithium carbonate is present in a non-uniform concentration distribution in the thickness direction of the positive electrode mixture layer.
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
A cylindrical battery (10) is provided with a bottomed cylindrical outer can (16), a wound electrode body (14) housed in the outer can (16), a sealing body (17) for sealing an opening of the outer can (16), and an upper insulation plate (18) disposed in the outer can (16) and positioned between the sealing body (17) and the electrode body (14) in the axial direction. The upper insulation plate (18) includes an outer portion (51) including an outer peripheral surface (53) and constituted by a first material, and an inner portion (52) positioned further radially inward relative to the outer portion (51) and constituted by a second material harder than the first material. The upper insulation plate (18) has a first through-hole that includes a portion positioned further radially inward relative to the outer portion (51).
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/184 - Sealing members characterised by their shape or structure
The present invention provides a cylindrical non-aqueous electrolyte secondary battery having a high capacity and improved safety. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises: an exterior can which has a bottomed cylinder shape and which has grooved part at an opening part thereof; an electrode body and a non-aqueous electrolyte which are housed in the exterior can; a sealing body which, at the opening part, is fixed by crimping between the grooved part and an opening end part; and an upper insulating plate which is inserted between the electrode body and the sealing body. The upper insulating plate has a first insulating plate which is in the shape of a disc smaller than the inner diameter of the grooved part, and a second insulating plate which is in the shape of a ring and which is disposed below the first insulating plate. The first insulating plate has higher heat resistance than the second insulating plate.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/167 - Lids or covers characterised by the methods of assembling casings with lids by crimping
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
The present invention provides a positive electrode for nonaqueous electrolyte secondary batteries, the positive electrode having improved adhesion, while suppressing variation in battery characteristics. A positive electrode for nonaqueous electrolyte secondary batteries according to one embodiment of the present disclosure comprises a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector; the positive electrode mixture layer contains a positive electrode active material, a conductive agent and a binder; the weight average molecular weight of the binder is 1,300,000 or more; and D10 and D90 in the particle size distribution of the binder satisfy (D90 - D10) ≥ 100 μm.
This sealed battery is provided with a bottomed tubular outer can for accommodating an electrode body, and a sealing body for sealing an opening part of the outer can. The outer can has a gas exhaust valve (40) which ruptures when the pressure inside the battery reaches a predetermined value. The gas exhaust valve (40) includes a plurality of linear grooves (32). The sealed battery is characterized in that: the cross-sectional shape of the grooves (32) is a tapering shape in which the width of open ends (32a) on the side of the surface of the outer can is shorter than the width of the bottom (32b); the grooves (32) have at least one crossing part (33); and the crossing part (33) has a flat section (34) in the bottom.
This non-aqueous electrolytic solution secondary battery (1) has a wound electrode body (2) in which a positive electrode (11) and a negative electrode (12) are wound with a separator interposed therebetween, a non-aqueous electrolytic solution, and a battery case for accommodating the wound electrode body (2) and the non-aqueous electrolytic solution. The relationship between the elemental nitrogen concentration A1 derived from a dinitrile-group-containing compound in an outermost circumferential surface (2a) of the wound electrode body (2), and the elemental nitrogen concentration B derived from a dinitrile-group-containing compound in an inner region located further inward than the outermost circumferential surface (2a) of the wound electrode body (2), satisfies A1>B.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
This cylindrical battery (10) comprises a bottomed cylindrical outer can (16), a wound electrode body (14) stored inside the outer can (16), a sealing body (17) which closes off an opening of the outer can (16), and an upper insulating plate (18) which is disposed inside the outer can (16) and is positioned between the sealing body (17) and the electrode body (14) in an axial direction. The upper insulating plate (18) has, on a lower surface (51) on the electrode body (14) side in the axial direction, an annular first groove, and a plurality of second grooves extending from the radially inside to the outside in the substantially radial direction toward the first groove side.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/184 - Sealing members characterised by their shape or structure
H01M 50/533 - Electrode connections inside a battery casing characterised by the shape of the leads or tabs
A cylindrical battery (10) comprises an electrode body (14) obtained by winding an elongated positive electrode (11) and an elongated negative electrode (12) with a separator (13) interposed therebetween. An exposed portion where a negative electrode current collector is exposed is arranged on at least a part of the outermost peripheral surface of the electrode body (14). Double sided tapes (39a, 39b) that fix an outermost peripheral portion (42) of the negative electrode (12) located on the outermost periphery of the electrode body (14) to an inner peripheral side portion (55) facing the inner peripheral surface of the outermost peripheral portion (42) are attached to the inner peripheral surface.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
Provided is a low-resistance sealed battery in which solidification cracking of a weld part of a negative electrode lead and an outer can is inhibited. A sealed battery according to one aspect of the present disclosure comprises: an electrode body obtained by winding a positive electrode and a negative electrode with a separator therebetween; a bottomed cylinder–shaped outer can that accommodates the electrode body; and a sealing body that blocks an opening part of the outer can. The outer can and a negative electrode lead connected to the negative electrode are welded at a weld part formed from the outside surface of the outer can to the negative electrode lead. The outer can is composed of a metal including Fe, the negative electrode lead is composed of a metal having Cu as a principal ingredient, and the Cu concentration of the weld part is 10 mass% or less.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
A non-aqueous electrolyte secondary battery according to one embodiment, wherein a mixture layer of an electrode has a first layer formed on a core body, and second and third layers formed on the first layer. The first, second, and third layers contain a binding agent, and the third layer is formed on at least a part of an end of the electrode. The content of the binding agent in the third layer is higher than the content of the binding agent in the first layer, and is greater than 0.8 mass% and less than 2.0 mass%.
A sealed battery (10) comprises: a bottomed tubular outer can (16) accommodating an electrode body (14); and a sealing body (17) for sealing an opening of the outer can (16). The present invention is characterized in that: the sealing body (17), together with the outer can (16), seals the electrode body (14); the sealing body includes a current blocking mechanism that is activated in response to gas pressure inside the battery, and a cap (30) that forms a sealed space (36) above the current blocking mechanism; and the cap (30) includes an explosion-proof valve (35) that opens in response to the gas pressure inside the battery.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
Provided is a cylindrical battery in which degradation of sealing properties is suppressed. A cylindrical battery (10) according to an embodiment of the present disclosure comprises a bottomed cylindrical exterior body (15), an electrode body (14) and a nonaqueous electrolyte that are accommodated in the exterior body (15), and a circular sealing body (16) that seals an opening in the exterior body (15) with a gasket (27), wherein the sealing body (16) has a protrusion (28) that abuts the end of the gasket (27) on the outside of the cylindrical battery (10).
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
The present invention achieves a high degree of safety by efficiently dissipating, to the outside, thermal energy from a battery that generates heat. This battery pack is provided with a battery core block (10) obtained by arranging a plurality of battery cells at prescribed positions in a battery holder (2), and a casing accommodating the core block (10). The casing is provided with a heat dissipating case (4) of which both ends are open, and a closing portion for closing the opening portions at both ends of the heat dissipating case (4). The heat dissipating case (4) is provided with: a tube portion (6) inside which the core block (10) is disposed, and which is formed by shaping metal into a tubular shape; and a plurality of rows of heat absorbing fins (7) which are thermally coupled to an inside surface of the tube portion (6), project inward from the tube portion (6), and comprise a metal disposed in an attitude extending in an axial direction of the tube portion (6).
H01M 10/6557 - Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
H01M 10/6563 - Gases with forced flow, e.g. by blowers
H01M 50/204 - Racks, modules or packs for multiple batteries or multiple cells
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
Provided is a non-aqueous electrolyte secondary battery having improved charge/discharge cycle characteristics and safety. A positive electrode active material for the non-aqueous electrolyte secondary battery that is one aspect of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte, the positive electrode having a positive electrode current collector and a positive electrode mixture layer that contains a positive electrode active material and that is formed on the surface of the positive electrode current collector, the positive electrode active material including a lithium-containing composite oxide represented by a prescribed general formula, the lithium-containing composite oxide having secondary particles formed by aggregation of primary particles, Ca being present on the surfaces and in the interiors of the secondary particles, and the proportion of Ca present on the surfaces of the secondary particles being 12-58% relative to the total amount of Ca present on the surfaces and in the interiors of the secondary particles.
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
The present invention provides a nonaqueous electrolyte secondary battery which is suppressed in the occurrence of an internal short circuit at the outer winding end of an electrode body. A nonaqueous electrolyte secondary battery according to one embodiment of the present disclosure comprises: an electrode body which is obtained by winding a positive electrode and a negative electrode, with a separator being interposed therebetween; a nonaqueous electrolyte; and an outer case for housing the electrode body and the nonaqueous electrolyte. The negative electrode comprises a first negative electrode active material and a second negative electrode active material that has a greater expansion coefficient than the first negative electrode active material during charging; and if the proportion of the mass of the second negative electrode active material with respect to the total mass of the first negative electrode active material and the second negative electrode active material is defined as the second negative electrode active material ratio, the second negative electrode active material ratio at the outer winding end is smaller than the second negative electrode active material ratio at the inner winding end.
This cylindrical battery (10) comprises: a bottomed tubular exterior can (16); an electrode body (14) which is housed in the exterior can (16) and around which a long positive electrode (11) and a long negative electrode (12) are wound with a separator (13) therebetween; a plurality of negative-electrode lead parts (21) extending from a long negative-electrode current collector of the negative electrode (12) toward the bottom part (68) of the exterior can (16); a first current-collector plate (40) that is disposed on the bottom part (68) side of the electrode body (14) and that has at least two through-holes (41) at the positions different from each other in the radial direction; and a second current-collector plate (45) disposed between the first current-collector plate (40) and the bottom part (68). The negative-electrode lead parts (21) each pass through any one of the through-holes (41). Leading-end portions of the plurality of negative-electrode lead parts (21) are sandwiched between the first current-collector plate (40) and the second current-collector plate (45), and are electrically connected to the second current-collector plate (45).
An electronic control device case that prevents development of gaps is provided. An electronic control device case (100) comprises: a body case (10) of which at least the front surface is open and including a bottom surface (13) and a pair of side walls (14) formed by bending ends of the bottom surface (13); and a cover portion (20) having a frontal plate (21) closing at least the front surface of the body case (10). The body case (10) has a first flange (11) formed by bending the front end of the bottom surface (13), and second flanges (12) formed by bending the front ends of the pair of side walls (14). The second flanges (12) are positioned in a second plane different from a first plane in which the first flange (11) is positioned. The electronic control device case (100) is configured such that, of the cover portion (20), the back surface side of the lower end of the frontal plate (21) is pressed by the first flange (11), and the front surface side of the side edges of the frontal plate (21) is pressed by the second flanges (12). The configuration makes it possible to sandwich and hold the edges of the frontal plate (21) of the cover portion (20) between the first flange (11) and the second flanges (12).
A cylindrical battery (10) comprises an electrode body (14) in which a positive electrode (11) and a negative electrode (12) are wound with a separator (13) therebetween, a bottomed cylindrical external can (16) which accommodates the electrode body (14), and a sealing body (17) which seals an opening of the external can (16). A bottom part (40) of the external can (16) has a reverse part (43) which has a raised shape such that the reverse part (43) protrudes toward the electrode body (14) in the axial direction and which reverses when the pressure inside the battery reaches a first pressure. The sealing body (17) has a sealing plate (27) which releases gas that is inside the battery by breaking when the pressure inside the battery reaches a second pressure that is higher than the first pressure. The sealing plate (27) functions as a safety valve.
H01M 10/04 - Construction or manufacture in general
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
The present invention blocks a current by reliably fusing a fuse element of an SCP with a simple circuit configuration. This power supply comprising a battery unit performs, with a control circuit 7, ON/OFF control of a switch 6 which connects, to a battery unit 1, an SCP 3 that is connected in series to the battery unit 1 and blocks charge/discharge current in an abnormal state. The battery unit 1 comprises a plurality of battery cells 2 connected in series, wherein: the SCP 3 includes a fuse element 4 connected in series to an output side of the battery unit 1, and a heater 5 for fusing the fuse element 4; the switch 6 comprises a plurality of switching elements 10 formed by connecting one terminal to the heater 5 and the other terminal to a different voltage terminal 11 of the battery unit 1; the control circuit 7 selects, with a selection circuit 9, the switching elements 10 switched to an ON state by a detection voltage of a voltage detection circuit 8; and the ON-state switching elements 10 connect the battery unit 1 to the heater 5 to fuse the fuse element 4.
H01H 9/54 - Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H 37/76 - Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from norm for accumulators
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
The objective of the present invention is to suppress situations in which a flame leaks to the outside in the event of an abnormality. This battery pack is provided with a first inorganic plate which is disposed in an opening of a casing, and which is disposed spaced apart from a battery holder by a first gap d1, and a second inorganic plate which is spaced apart from the first inorganic plate by a second gap d2. The first inorganic plate has a plurality of first through holes opened in a prescribed first pattern, the second inorganic plate has a plurality of second through holes opened in a prescribed second pattern, the casing forms an inner rib which projects from an inner surface of the opening, the inner rib is interposed between the first inorganic plate and the second inorganic plate to form the second gap d2, and positions the first inorganic plate and the second inorganic plate in such a way that the second through holes are positionally displaced from the first through holes, such that the interior of the casing cannot be viewed from the outside.
According to the present invention, a flammable gas within a battery pack is safely discharged to the outside from the battery pack, while suppressing breakage of a fitting connection part of a case due to increase of the internal pressure. A battery pack according to the present invention contains a battery unit (10) in an outer package case (2) that is composed of a first case (2A) and a second case (2B). The first case (2A) and the second case (2B) are connected to each other by having stacking plates of a first peripheral wall (4A) and a second peripheral wall (4B) stacked upon each other at opening ends. The first peripheral wall (4A) connects a first stacking plate (5A) that is stacked on the outer surface, while the second peripheral wall (4B) connects a second stacking plate (5B) that is stacked on the inner surface. The first stacking plate (5A) has plural arrays of reinforcement ribs (6) that protrude from the inner surface; the second stacking plate (5B) has a fitting part that is composed of plural arrays of slits or grooves into which the reinforcement ribs (6) are to be guided; and the first case (2A) and the second case (2B) are connected to each other by guiding the reinforcement ribs (6) into the fitting part.
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/271 - Lids or covers for the racks or secondary casings
H01M 50/35 - Gas exhaust passages comprising elongated, tortuous or labyrinth-shaped exhaust passages
H01M 50/367 - Internal gas exhaust passages forming part of the battery cover or case; Double cover vent systems
57.
BATTERY PACK FAILURE DIAGNOSTIC METHOD AND BATTERY PACK
A failure diagnostic method of a overcurrent detection circuit that can diagnose an overcurrent detection circuit and maintain these in a safe state, and a battery pack are provided. This battery pack failure diagnostic method compares a threshold value and a detection signal of a current detection element (4) linked to the output side of a battery unit (1), and determines an overcurrent when the detection signal is an overcurrent value that exceeds the threshold, wherein an overcurrent diagnostic signal is inputted to the overcurrent detection circuit (5) to determine failure of the overcurrent detection circuit (5).
G01R 19/165 - Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
G01R 31/00 - Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
58.
CYLINDRICAL BATTERY AND MANUFACTURING METHOD FOR SAME
A cylindrical battery (10) comprises: an outer can (16) having a bottomed cylinder shape; an electrode body (14) that is accommodated inside the outer can (16), and in which an elongated positive electrode (11) and an elongated negative electrode (12) having different polarities from each other are wound with a separator (13) interposed therebetween; a metal plate (19) that is disposed between the electrode body (14) and a bottom part (68) of the outer can (16); and a plurality of negative electrode lead parts (21) that extend from the negative electrode (12) towards the bottom part (68). A tip part (21a) of each negative electrode lead part (21) is sandwiched between the metal plate (19) and the bottom part (68), and is electrically connected to the bottom part (68).
H01M 10/04 - Construction or manufacture in general
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/534 - Electrode connections inside a battery casing characterised by the material of the leads or tabs
H01M 50/538 - Connection of several leads or tabs of wound or folded electrode stacks
H01M 50/545 - Terminals formed by the casing of the cells
H01M 50/548 - Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
H01M 50/566 - Terminals characterised by their manufacturing process by welding, soldering or brazing
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
59.
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
A negative electrode (30) for nonaqueous electrolyte secondary batteries according to the present invention comprises a negative electrode collector (32) and a negative electrode active material layer (34) that is provided on the negative electrode collector (32); and with respect to the negative electrode active material layer (34), first active material layers (X) and second active material layers (Y) are alternately arranged on the negative electrode collector (32), the first and second active material layers containing, as a negative electrode active material, graphite particles A and graphite particles B, while being different from each other in the content of the graphite particles A relative to the total mass of the graphite particles A and the graphite particles B. The internal void fraction of the graphite particles A is lower than the internal void fraction of the graphite particles B; and the content of the graphite particles A in the first active material layers (X) is higher than the content of the graphite particles A in the second active material layers (Y). The ratio of the width Wx of the first active material layers (X) to the width Wy of the second active material layers (Y), namely Wx/Wy is 0.03 to 3.13.
The present invention provides a power supply device which has enhanced safety. A power supply device (100) according to the present invention is provided with: a plurality of secondary battery cells (1), each of which is provided with a positive electrode (2) on one end face, the positive electrode having a safety valve; a battery holder which holds the plurality of secondary battery cells (1), each having the positive electrode (2) on one end face, in upright postures so as to be parallel to each other, with the positive electrodes (2) facing vertically downward; and a case (20) that has a bottom surface (22) and a top surface (23) in the internal space in which the battery holder is contained. The battery holder is maintained within the case (20) in such a manner that the positive electrodes (2) of the secondary battery cells (1) are at a distance from the bottom surface (22), thereby forming a first space (SP1) therebetween. Due to the above-described configuration, the first space (SP1) is provided between the bottom surface (22) and the positive electrodes (2) of the secondary battery cells (1) so as to be used as an exhaust space in cases where a gas is discharged from the safety valve, and while enabling the achievement of enhanced safety by holding the positive electrodes (2) at a distance from the bottom surface (22) where water is easily accumulated in cases where the power supply device (100) is flooded or submerged in water.
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
An embodiment of the present invention provides a non-aqueous electrolyte secondary battery wherein a separator has a porous base material and a heat-resistant layer including a filler and a binding agent. The heat-resistant layer includes a first heat-resistant layer formed on a first surface of the base material facing a positive electrode and a second heat-resistant layer formed on a second surface of the base material facing a negative electrode. The first heat-resistant material is formed as a sheet on the first surface of the base material and the second heat-resistant layer is formed as dots on the second surface of the base material. The average value of the intervals between the plurality of dots constituting the second heat-resistant layer is 30-100 μm.
H01M 50/446 - Composite material consisting of a mixture of organic and inorganic materials
H01M 50/451 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
H01M 50/457 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
H01M 50/489 - Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties
62.
NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
With respect to a negative electrode for nonaqueous electrolyte secondary batteries according to the present invention, a negative electrode mixture layer comprises a lower layer that is formed on the negative electrode core body side and an upper layer that is formed on the front surface side of the negative electrode mixture layer. According to the present invention, graphite particles contain: first graphite particles which have a circularity of less than 0.92; and second graphite particles which have a higher circularity than the first graphite particles. The ratio of the breaking strength of the first graphite particles to the breaking strength of the second graphite particles is 2 to 5. The content ratio of the first graphite particles relative to the graphite particles in the upper layer is 30% by mass or more, and is higher than the content ratio of the first graphite particles relative to the graphite particles in the lower layer.
A nonaqueous electrolyte secondary battery according to one embodiment of the present invention is provided with: a positive electrode which comprises a positive electrode core body and a positive electrode mixture layer that is provided on the positive electrode core body; and a negative electrode which comprises a negative electrode core body and a negative electrode mixture layer that is provided on the negative electrode core body. The 0.2 percent proof stress of the positive electrode core body is larger than the 0.2 percent proof stress of the negative electrode core body. It is preferable that the 0.2 percent proof stress of the positive electrode core body is not less than 1.05 times the 0.2 percent proof stress of the negative electrode core body.
The present invention reduces the power consumption of an activation circuit in a low power consumption mode, to thereby further reduce the power consumption in this state. This power supply device comprises: a battery module (10) having a plurality of battery cells (1) that can be charged; a battery connection circuit (2) which is formed by being connected to the battery module (10) and which has a switching function for a low power consumption mode; an activation circuit (3) that activates the battery connection circuit (2); and an activation switch (4) which is connected to the activation circuit (3) and which outputs an activation signal. The activation circuit (3) is provided with: an input transistor (5) which is connected to the activation switch (4) between a base and an emitter and which is switched to an off state by an on signal from the activation switch (4); and an FET output circuit (6) which is connected to the output side of the input transistor (5) and which outputs an activation signal to the battery connection circuit (2) in a low power consumption state by the input transistor (5) switched from on to off.
The present invention restarts a detection circuit and microcomputer in a low power consumption mode simply and easily with stability. This power supply device comprises: a battery module (10) having a plurality of battery cells (1); a battery connection circuit (2) which detects battery information on the battery module (10) and which has a switching function for a low power consumption mode; a start circuit (3) which switches the battery connection circuit (2) from the low power consumption mode to an operating mode; and a start switch (4) which outputs an on/off signal to the start circuit (3). The battery connection circuit (2) is provided with: a detection circuit (21) which detects the battery information; and a microcomputer (22) which applies calculation processing to the battery information detected by the detection circuit (21). The start circuit (3) is provided with: a first switching circuit (6A) which outputs a first start pulse to the detection circuit (21) by the on/off signal input from the start switch (4); and a second switching circuit (6B) which outputs a second start pulse having a wider pulse width than that of the first start pulse to the microcomputer (22) by the on/off signal input from the start switch (4).
The present invention makes it possible to suppress uneven distribution of current even in a state in which a plurality of semiconductor elements are mounted in a limited surface area on a circuit board. This power supply device comprises a secondary battery cell, charge/discharge FETs (21 to 28), and a circuit board 30 provided with a first terminal block (31) and a second terminal block (32). The first charge/discharge FET (21) and the third charge/discharge FET (23) are arranged on the first-terminal-block side, and the second charge/discharge FET (22) and the fourth charge/discharge FET (24) are arranged on the second-terminal-block side. A first current path (41) that serially connects the first charge/discharge FET (21) and the second charge/discharge FET (22) is formed to be longer than a second current path (42) that serially connects the third charge/discharge FET (23) and the fourth charge/discharge FET (24). The first current path (41) is provided with a first current inhibition region (51) that inhibits the flow of current. The second current path (42) is provided with a second current inhibition region (52). A second electrical resistance (52R) of the second current inhibition region (52) is higher than a first electrical resistance (51R) of the first current inhibition region (51).
The present invention makes it possible to avoid unintentional damage at the time of assembly of a power supply device and enhance workability. Provided is a method for producing a power supply device comprising a plurality of secondary battery cells (1) each having electrode terminals, a battery holder (10) for holding the plurality of secondary battery cells (1), and a circuit board electrically connected with the plurality of secondary battery cells (1) and having a control circuit for controlling charging/discharging mounted thereon, wherein the method for producing a power supply device includes: a step in which a battery-side ground terminal (30) led out to the exterior from the battery holder (10) and serving as a ground side for the total output resulting from electrically connecting the plurality of secondary battery cells (1) in series and/or in parallel is connected with a board-side ground terminal provided to the circuit board; and a step in which the circuit board is placed on one surface of the battery holder (10) and one or more battery-side intermediate terminals (21) that are provided to the battery holder (10) and electrically connected with at least one of the plurality of secondary battery cells (1) are individually connected with one or more board-side intermediate terminals provided to the circuit board.
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/284 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
H01M 50/296 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
H01M 50/298 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
H01M 50/507 - Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
H01M 50/572 - Means for preventing undesired use or discharge
According to the present invention, a core block housed within an outer case is effectively prevented from moving relative to the outer case. A main cylinder part is formed to be thin and light at a low cost, and openings at both ends of the main cylinder part are precisely covered with covering parts. This battery pack comprises a core block (10) composed of a plurality of battery blocks (9) that are stacked and interconnected, the battery blocks (9) being composed of a plurality of battery cells (1) arranged at fixed positions of a battery holder, an outer case (3) provided with a cylindrical main cylinder part (4) into which the core block (10) is inserted and a pair of covering parts (5) that cover openings at both ends of the main cylinder part (4), and a fastening member (6) that fastens the pair of covering parts (5) and clamps the main cylinder part (4) from both sides with the pair of covering parts (5). The core block (10) is housed within the outer case (3) at such an orientation that the plurality of the battery blocks (9) are stacked in the axial direction of the main cylinder part (4), and the fastening member (6) fastens the pair of covering parts (5) with the core block (10) interposed therebetween.
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/262 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
69.
POWER SOURCE DEVICE AND METHOD FOR MANUFACTURING SAME
The purpose of the present invention is to avoid erroneous fusing of a fuse during assembly and increase workability. Provided is a method for manufacturing a power source device (100) comprising a battery unit (2) in which a plurality of secondary battery cells (1) are at least connected in series and which is provided with a low-voltage-side battery-side ground (21G) and a high-voltage-side battery-side output (21H) that are connected in said series, and a circuit unit (3) that is electrically connected to the battery unit (2), controls charging and discharging, and is provided with an overvoltage sensing fuse for detecting overvoltage and fusing. The method for manufacturing includes: a step for respectively connecting, to one or more circuit-side intermediate terminals (41) provided to the circuit unit (3), one or more battery-side intermediate terminals (21) electrically connected to the intermediate potential of at least some of the plurality of secondary battery cells (1) connected in series, which are provided to the battery unit (2), in a state where a detachable lead member (50) for connecting the overvoltage sensing fuse and the battery-side output (21H) has been detached; and a step for fixing the lead member (50) to the circuit unit (3) and connecting the overvoltage sensing fuse and the battery-side output (21H).
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/284 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
H01M 50/298 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by the wiring of battery packs
H01M 50/574 - Devices or arrangements for the interruption of current
Provided is a non-aqueous electrolyte secondary battery having improved charge and discharge cycle characteristics. The non-aqueous electrolyte secondary battery according to one mode of the present disclosure comprises an electrode body (14) in which a band-form positive electrode (11) and a band-form negative electrode (12) are wound with a separator (13) interposed therebetween, an electrolytic liquid, and an exterior body (15) that accommodates the electrode body (14) and the electrolytic liquid. The negative electrode (12) has a negative electrode current collector (40), and a negative electrode mixture layer (42) that is formed on the surface of the negative electrode current collector (40) and that contains a negative electrode active material and an electroconductive agent. In the negative electrode mixture layer (42), the electroconductive agent content in a winding outer end (42b) is greater than the electroconductive agent content in a winding inner end (42a), the negative electrode mixture layer (42) having a region in which the electroconductive agent content continuously increases from the winding-inner-end side (42a) to the winding-outer-end side (42b).
H01M 4/133 - Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/134 - Electrodes based on metals, Si or alloys
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
Provided is a non-aqueous electrolyte secondary battery having improved charge and discharge cycle characteristics. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises: an electrode body in which a belt-shaped positive electrode and a belt-shaped negative electrode are wound with a separator therebetween; an electrolyte; and an outer case which accommodates the electrode body and the electrolyte. The negative electrode has a negative electrode current collector and a negative electrode mixture layer which is formed on a surface of the negative electrode current collector and which contains a negative electrode active material and a solid electrolyte. The negative electrode mixture layer has a region in which the solid electrolyte content in the inner winding end part is higher than the solid electrolyte content in the outer winding end part, and the solid electrolyte content continuously decreases from the inner winding end part side to the outer winding end part side.
Provided is a non-aqueous electrolyte secondary battery with which decrease in battery capacity due to repetition of charging and discharging is suppressed. A non-aqueous electrolyte secondary battery according to one aspect of the present disclosure is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the surface of the negative electrode current collector. The negative electrode mixture layer includes a first negative electrode mixture layer opposite to the negative electrode current collector, and a second negative electrode mixture layer laminated on the surface of the first negative electrode mixture layer. The negative electrode mixture layer includes graphite particles and a highly dielectric material having a higher dielectric constant than the graphite particles. The porosity between the graphite particles in the second negative electrode mixture layer is greater than the porosity between the graphite particles in the first negative electrode mixture layer. The content proportion of the highly dielectric material in the first negative electrode mixture layer is greater than the content proportion of the highly dielectric material in the second negative electrode mixture layer.
A seal plate (27) of a cylindrical battery (10) has an outer peripheral portion (27b), which is at least partly fixed to an opening of an outer can (16), and an annular thin portion (27c) adjacent to the outer peripheral portion (27b). The thin portion (27c) has a sloping portion (56) sloping radially inward toward the bottom of the outer can (16) in an axial direction. In a cross section of the thin portion (27c) taken in a plane including the radial direction and the axial direction, an inner surface of an adjacent portion (59) adjacent to the outer peripheral portion (27b) of the thin portion (27c) has a curved shape, and the gradient of an outer surface (70) of the thin portion (27c) changes towards the outer peripheral portion (27b) so as to decrease the thickness of the adjacent portion (59).
H01M 50/152 - Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
74.
NEGATIVE ELECTRODE ACTIVE MATERIAL COMPOSITE PARTICLE, METHOD FOR MANUFACTURING NEGATIVE ELECTRODE ACTIVE MATERIAL COMPOSITE PARTICLE, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
A negative electrode active material composite particle according to one embodiment is a composite particle for a negative electrode active material, the composite particle including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and a resin baked body. The resin baked body containing at least one element selected from F and N. The composite particle has a porosity of 10% or less, for example, and the content of the resin baked body is 1-20% by mass with respect to the mass of the composite particle.
The purpose of the present invention is to prevent inducement of thermal runaway while reducing manufacturing costs. In this battery pack, a plurality of battery cells that are are cylindrical in shape and that are capable of charging and discharging are stored in an exterior case in mutually parallel orientations, with a heat-resistant wall (3) being positioned between the battery cells. The heat-resistant wall (3) has a heat-insulated recess (4) that forms an air layer having a length (L) extending in the long-axis direction of the battery cells and a lateral width (W) extending in the circumferential direction, the heat-insulated recess (4) being located in a surface facing the surfaces of the battery cells.
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
A nonaqueous electrolyte secondary battery (10) is provided with a bottomed tubular outer can (16) accommodating an electrode body (14), and a sealing body (17) for sealing an opening portion of the outer can (16). A crimped portion (31) for crimping and securing the sealing body (17) is formed in the outer can (16) by bending the edge portion of the opening portion inward in the radial direction, and the sealing body (17) includes a rupture disk (24), a cathode cap (27) including a flange (27a), and a metal height adjusting portion (40) for adjusting the height of the crimped portion (31).
Provided is a non-aqueous electrolyte secondary battery having improved charge and discharge cycle characteristics. A non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises: an electrode body obtained by winding a positive electrode and a negative electrode with a separator therebetween; an electrolytic solution; and an exterior body that houses the electrode body and the electrolytic solution. The negative electrode has: a negative electrode current collector; and a negative electrode mixture layer formed on the surface of the negative electrode current collector, wherein the negative electrode mixture layer contains a negative electrode active material and fibrous carbon, and the average fiber length of the fibrous carbon contained in the central part of the negative electrode mixture layer in the width direction is greater than the average fiber length of the fibrous carbon contained in both end parts of the negative electrode mixture layer in the width direction.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
According to the present invention, a battery (1) is provided with: a laminate film outer package (5) which is configured by bonding film materials; and a flat electrode body (10) which is contained in the laminate film outer package (5). According to the present invention, a positive electrode has a positive electrode non-coated part, in which a positive electrode mixture layer is not present and a positive electrode core body is exposed, in a midway in the longitudinal direction; and a negative electrode has a negative electrode non-coated part, in which a negative electrode mixture layer is not present and a negative electrode core body is exposed, in a midway in the longitudinal direction. The battery (1) is provided with: a positive electrode tab (15) which is bonded and electrically connected to the positive electrode non-coated part; and a negative electrode tab (20) which is bonded and electrically connected to the negative electrode non-coated part. The positive electrode tab (15) and the negative electrode tab (20) generally pass through the center of the flat electrode body (10) in the thickness direction, while being positioned on the same side with respect to a virtual plane that is generally perpendicular to the thickness direction of the flat electrode body.
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
This non-aqueous electrolyte secondary battery is characterized by comprising: a wound electrode body (14) in which a positive electrode and a negative electrode are wound via a separator (13); and a non-aqueous electrolyte. Said battery is also charaterized in that: the separator (13) has a porous base material and a heat-resistance porous layer (32) formed on the porous base material and opposing at least one of the positive electrode and the negative electrode; and when the separator (13) is divided into five parts in the width direction and the five divided regions are defined as a region A positioned on one end of the separator (13) in the width direction, a region B positioned on the other end of the separator in the width direction, a region C positioned in the center of the separator in the width direction, a region D positioned between the region A and the region C, and a region E positioned between the region B and the region C, then the void ratio of the region D and the region E is greater than the void ratio of the region A, the region B, and the region C.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/409 - Separators, membranes or diaphragms characterised by the material
H01M 50/451 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising layers of only organic material and layers containing inorganic material
H01M 50/457 - Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
H01M 50/463 - Separators, membranes or diaphragms characterised by their shape
A non-aqueous electrolyte secondary battery positive electrode (11) that is characterized by comprising a positive electrode collector (40) and a positive electrode mixture layer (42) that is provided on the positive electrode collector (40) and includes a positive electrode active material and a conductive material that includes carbon nanotubes. The non-aqueous electrolyte secondary battery positive electrode (11) is also characterized in that, when the positive electrode mixture layer (42) is bisected in the thickness direction, the mass ratio of carbon nanotubes to positive electrode active material in an upper-half region (42b) that is on a top surface side is smaller than the mass ratio of carbon nanotubes to positive electrode active material in a lower-half region (42a) that is on the positive electrode collector (40) side.
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
H01M 4/62 - Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
This non-aqueous electrolyte secondary battery is characterized by: comprising a wound electrode body in which a positive electrode (11) and a negative electrode are wound with a separator therebetween; the positive electrode (11) having a positive electrode current collector (40), a first positive electrode mixture layer (41) formed on a first surface (40a) of the positive electrode current collector (40) which faces the outside of the electrode body, and a second positive electrode mixture layer (42) formed on a second surface (40b) of the positive electrode current collector (40) which faces the inside of the electrode body; the first positive electrode mixture layer (41) and the second positive electrode mixture layer (42) each containing a positive electrode active material; and the dibutyl phthalate oil absorption amount of the positive electrode active material contained in the first positive electrode mixture layer (41) being less than the dibutyl phthalate oil absorption amount of the positive electrode active material contained in the second positive electrode mixture layer (42).
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
82.
POSITIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
A positive electrode (11) for a non-aqueous electrolyte secondary battery comprises a positive electrode current collector (40) and a positive electrode mixture layer (42) that is disposed on the positive electrode current collector (40) and includes a positive electrode active substance. The quantity of dibutyl phthalate oil absorbed by the positive electrode active substance included in a lower-half region (42a) of the positive electrode mixture layer (42) which is on the positive electrode current collector (40) side, when the positive electrode mixture layer (42) is divided in the thickness direction into two equal parts, is less than the quantity of dibutyl phthalate oil absorbed by the positive electrode active substance included in an upper-half region (42b) which is on the surface side; the quantity of dibutyl phthalate oil absorbed by the positive electrode active substance included in the lower-half region (42a) is at least 11 mL/100 g and no more than 19 mL/100 g; and the quantity of dibutyl phthalate oil absorbed by the positive electrode active substance included in the upper-half region (42b) is at least 15 mL/100 g and no more than 23 mL/100 g.
A non-aqueous electrolyte secondary battery (10) is characterized by comprising an electrode body (14) in which a positive electrode (11) and a negative electrode (12) face each other with a separator (13) therebetween, and a battery case (15) that accommodates the electrode body (14), wherein: the positive electrode (11) has a positive electrode mixture layer containing a positive electrode active material; and when the non-aqueous electrolyte secondary battery (10) is used in a fixed state, and the electrode body (14) in the fixed state is bisected in the vertical direction, a dibutyl phthalate oil absorption amount of the positive electrode active material contained in the positive electrode mixture layer disposed in the top half region is higher than a dibutyl phthalate oil absorption amount of the positive electrode active material contained in the positive electrode mixture layer disposed in the bottom half region.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/10 - Primary casings, jackets or wrappings of a single cell or a single battery
The present invention provides a cylindrical battery in which the opening end of an outer can has an external terminal of a different polarity from a sealing body and easily connectable to an external lead. A cylindrical battery (10) that is one embodiment described in the present disclosure comprises: an electrode body (14) that includes a positive electrode (11) and a negative electrode (12); a bottomed cylindrical outer can (16) that houses the electrode body (14) and is connected to one of the positive electrode (11) and the negative electrode (12); and a sealing body (17) that is connected to the other of the positive electrode (11) and the negative electrode (12). The outer can (16) has a groove (23), and an opening end (16a) that extends radially outward. The sealing body (17) is fixed by crimping between the groove (23) and a pressing member (24) with a gasket (18) interposed therebetween, said pressing member (24) being joined to the opening end (16a).
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/167 - Lids or covers characterised by the methods of assembling casings with lids by crimping
H01M 50/55 - Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
The present invention provides a cylindrical battery in which the opening end of an outer can has a different polarity from a sealing body and is easily connectable to an external lead. A cylindrical battery (10) that is one embodiment described in the present disclosure comprises: an electrode body (14) that includes a positive electrode (11) and a negative electrode (12); a bottomed cylindrical outer can (16) that houses the electrode body (14) and is connected to one of the positive electrode (11) and the negative electrode (12); and a sealing body (17) that is connected to the other of the positive electrode (11) and the negative electrode (12). The outer can (16) has a protrusion (16a) formed by the side surface thereof protruding radially inward, and an opening end (16b) extends radially outward. The sealing body (17) is fixed by crimping radially inward of the protrusion (16a) with a gasket (18) interposed therebetween.
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
H01M 50/167 - Lids or covers characterised by the methods of assembling casings with lids by crimping
H01M 50/55 - Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
This battery storage tray (1) is provided with: a bottom plate (65) which supports a plurality of batteries (10); a side wall which extends from the outer peripheral part of an upper surface (31) of the bottom plate (65) in the thickness direction of the bottom plate (65) so as to surround a stage surface (32) for the plurality of batteries (10) in the upper surface (31), thereby defining a battery storage space, in which the plurality of batteries (10) are contained, together with the bottom plate (65); and a plate-like permanent magnet (35) which is affixed to at least a part of a bottom surface (65a) of the bottom plate (65).
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
A gasket (28) is equipped with a cylindrically shaped cylindrical part (29), and a ring part (30) which extends in a radially inward direction from one end section of the cylindrical part (29) in the axial direction thereof. The cylindrical part (29) has a projecting part (31) which projects in a radially inward direction between both end sections thereof in the axial direction. The projecting part (31) has a first angled section positioned on the ring part 30 side thereof, and a second angled section positioned on the side thereof opposite the ring part (30), and if a sealing body (17) is placed on the ring part (30), the first angled section is formed so as not to extend beyond the top surface (39) of the flange section of the sealing body (17).
This cylindrical battery comprises a cylindrical outer can having a closed end, and a sealing body that closes an opening of the outer can. The sealing body has a sealing plate (27) including a plurality of thick portions (40) that extend radially in the radial direction, and a plurality of thin portions (41) that extend radially in the radial direction and are thinner than the thick portions (40). The plurality of thick portions (40) and the plurality of thin portions (41) are arranged alternating in the circumferential direction. In this way, the sealing plate becomes less susceptible to deformation and increased capacity becomes easier to realize, while material costs of the sealing plate are suppressed.
The present invention increases impact strength by allowing an outer case to absorb an impact on a core pack containing a plurality of batteries. This battery pack comprises a core pack (2) containing a plurality of batteries, and an outer case (1) containing the core pack (2). The outer case (1) has a box shape formed by connecting an outer peripheral wall (4) to an outer periphery of a pair of surface plates (3). The outer peripheral wall (4) provided at an external corner (3a) of the surface plates (3) includes an impact absorbing gap (7) formed by separating, at a predetermined interval, an impact absorbing wall (5) on an outer surface and a main body wall (6) disposed inside the impact absorbing wall (5). The impact absorbing gap (7) is open on the side of the surface plates (3).
H01M 50/242 - Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
The present invention is for inhibiting ignition when an abnormality occurs in a battery. A sealed battery, which is one example of an embodiment of the present invention, comprises: an electrode body (14); a bottomed tubular exterior can (16) that accommodates the electrode body (14); and a sealing body (17) that plugs an opening section of the exterior can (16). The exterior can (16) or the sealing body (17) has provided thereto an exhaust structure for discharging gas by breaking when internal pressure of the exterior can exceeds a predetermined threshold. A sealed battery, which is one example of an embodiment of the present invention, comprises a potassium salt sheet (50) that contains a potassium salt and that is disposed between an end surface of the electrode body and a bottom surface part of the exterior can having the exhaust structure or the sealing body having the exhaust structure.
Provided is a secondary battery in which corrosion of an exterior body is stably suppressed. A non-aqueous electrolyte secondary battery according to an embodiment of the present disclosure comprises: an exterior body having a bottomed cylindrical shape and having a grooving portion (21) in an opening portion (15a); an electrode body and a non-aqueous electrolyte housed in the exterior body; and a sealed body (16) caulked and fixed between the grooving portion (21) and an opening end (15b) in the opening (15a), wherein in a portion from the grooving portion (21) of the inner surface of the exterior body to the open end portion (15b), a powder of at least one among compounds selected from the group consisting of hydroxides, oxides, and carbonates is present.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/184 - Sealing members characterised by their shape or structure
H01M 50/186 - Sealing members characterised by the disposition of the sealing members
A sensor unit in one example embodiment of the present invention is a sensor unit that is loaded into battery production equipment and is provided with a bottomed cylindrical case which is processed similarly to a battery outer can via the battery production equipment, and a sensor which is attached to the case and detects force acting on the case from the battery production equipment. The sensor unit is provided with, for example, a first component to which the sensor is attached and which is accommodated inside the case, and a second component which is disposed so as to engage the outside of the first component. The first component is configured to be removable from an opening in the case by being separated from the second component.
H01M 10/04 - Construction or manufacture in general
H01M 10/48 - Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
H01M 50/10 - Primary casings, jackets or wrappings of a single cell or a single battery
The purpose of the present disclosure is to provide a method for producing a lithium-nickel complex oxide, the method being capable of suppressing a variation in crystallite size. The method for producing a lithium-nickel complex oxide according to an aspect of the present disclosure comprises: a filling step for filling a firing container (7) with a Ni-containing metal compound and a Li compound to obtain a filling material (5) including the Ni-containing metal compound and the Li compound; and a firing step for firing the filling material (5) that fills the firing container (7), wherein, in the filling step, when the filling material (5) that fills the firing container (7) is divided into two equal parts in the height direction, the molar ratio A of Li to metals other than Li in the filling material (5a) in the upper half region and the molar ratio B of Li to metals other than Li in the filling material (5b) in the lower half region satisfy 1
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
The present invention realizes a high level of safety by preventing harmful effects resulting from solid discharge from a can-bottom valve that opens. A battery module according to the present invention comprises: a plurality of cylindrical batteries (1); and a lead plate (3) that is connected to the cylindrical batteries (1) and electrically connects the plurality of cylindrical batteries (1). Each of the cylindrical batteries (1) has a can-bottom valve (16) comprising a thin-walled line that breaks, when the internal pressure of an exterior can exceeds a threshold pressure, and opens a discharge port. The lead plate (3) comprises: a double-holding arm (31) that is arranged so as to oppose the can bottom of the cylindrical batteries (1) and is obtained by connecting both ends to the lead plate (3) at positions opposing the can-bottom valve (16); and a gas permeation gap (32) for discharged gas ejected from the discharge port, the gas permeation gap (32) being located on both sides of the double-holding arm (31).
H01M 50/213 - Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for cells having curved cross-section, e.g. round or elliptic
H01M 50/503 - Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
The purpose of the present disclosure is to expand the insulation area of an electrode body and an outer package can, to improve the insulation performance of a battery. A sealed battery is one example of an embodiment, and is provided with an electrode body, a bottomed cylindrical outer package can that houses the electrode body, a sealing body that seals up an opening part of the outer package can, and insulating plates each placed between the respective end faces of the electrode body and the outer package can. A first face of each of the insulating plates faces the electrode body. The outer edge of the first face stands on the insulating plate outside the outer edge of a second face of each of the insulating plates which is on the opposite side of the first face. The sealed battery, which is one example of an embodiment, is provided with a top insulating plate and a bottom insulating plate as the insulating plates.
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/586 - Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries inside the batteries, e.g. incorrect connections of electrodes
abcdeff (wherein 0.9 ≤ a ≤ 1.2; 0.88 ≤ b ≤ 0.96; 0 ≤ c ≤ 0.12; 0 ≤ d ≤ 0.12; 0 ≤ e ≤ 0.1; 1.9 ≤ f ≤ 2.1; (b + c + d) = 1; and X represents at least one element that is selected from among Mn, Mg, Ca, Sr, Ba, Ti, Zr, V, Nb, Ta, Mo, W and B); and the lithium transition metal composite oxide has a pore volume of pores having a pore diameter of 0.3 μm or less of from 6 × 10-4mL/g to 50 × 10-4 mL/g, while having a particle fracture strength of 120 MPa or more at the volume average particle diameter.
H01M 4/131 - Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
H01M 4/505 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
H01M 4/525 - Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
97.
POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery that has high capacity and excellent cycle characteristics. A nonaqueous electrolyte secondary battery according to one embodiment of the present invention is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. An electrode mixture layer of the positive electrode contains: first lithium metal composite oxide particles that are non-aggregated particles which have a volume-based median diameter of from 2 μm to 10 μm; and second lithium metal composite oxide particles that are secondary particles, in each of which primary particles having an average particle diameter of from 50 nm to 2 μm aggregate, and which have a volume-based median diameter of from 10 μm to 30 μm. If the positive electrode mixture layer is divided into equal halves in the thickness direction and the halves are defined as the first region and the second region sequentially from the surface side of the positive electrode mixture layer, the content of the first lithium metal composite oxide particles in the first region is higher than the content of the first lithium metal composite oxide particles in the second region.
Provided are a highly reliable cylindrical battery and the like which exhibit a small variation in operation pressure of a current cutoff mechanism. A cylindrical battery (10) comprises a current cutoff mechanism having a sealing body (17) which includes a terminal plate (23) for cutting off flowing of current by being broken. A gasket (28) of the cylindrical battery (10) has, in an independent state before incorporation into an exterior can (16), a cylindrical part and an annular part which extends from an end at a first axial side of the cylindrical part to the radially inner side. The annular part has, at a radially inner side portion of a surface at the first axial side, a recess recessed toward a second axial side.
The purpose of the present disclosure is to provide a secondary battery capable of maintaining a favorable conduction state between a case main body and an exposed section of a negative electrode current collector. A secondary battery according to one embodiment of the present disclosure is characterized by comprising a metal case main body that has an opening, a sealing body that seals the opening of the case main body, and an electrode body that is accommodated in the case main body and formed by winding a positive electrode and negative electrode with a separator interposed therebetween, wherein: the negative electrode includes a negative electrode current collector, a negative electrode active material layer formed on the negative electrode current collector, and a negative electrode current collector exposed section where the negative electrode active material layer is not formed and the negative electrode current collector is exposed; the negative electrode current collector exposed section is disposed on a winding ending section of the electrode body and makes more than one lap circling in the winding starting direction L from the winding ending section of the electrode body, thereby forming a laminated part comprising the negative electrode exposed section, the laminated part and the case main body being welded together.
H01M 10/04 - Construction or manufacture in general
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
H01M 50/107 - Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery that can suppress damage to an electrode body in the vicinity of an end of an insulation tape due to repetition of charging and discharging. A non-aqueous electrolyte secondary battery (10) is characterized by comprising: an exterior body (15); a wound-type electrode body (14) which is housed in the exterior body (15) and in which a positive electrode (11) and a negative electrode (12) are wound with a separator (13) interposed therebetween; and an insulation tape stuck to the electrode body (14). The non-aqueous electrolyte secondary battery is also characterized in that the insulation tape has a base material layer and an adhesive layer that is provided on a main surface of the base material layer, and a side surface of the base material layer is non-vertically inclined with respect to the main surface.
H01M 4/13 - Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 10/0587 - Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
patents
