Battery

Abstract

A battery with an electrode body containing positive and negative electrodes stacked alternately in a first direction with a separator between them. The positive electrode current collector has a first ridge, and the negative electrode current collector has a second ridge. The battery meets either condition (A) or (B): (A) several first ridges do not include a pair of first ridges where the projection directions of adjacent first ridges differ, and several second ridges do not include a pair of second ridges where the projection directions of adjacent second ridges differ; or (B) several first ridges include only one pair of first ridges where the projection directions of adjacent first ridges differ, and several second ridges include only one pair of second ridges where the projection directions of adjacent second ridges differ.

Description

BACKGROUNDTechnical area

[0001] The present disclosure relates to a battery. Related prior art

[0002] Japanese Patent Application Laid-Open (JP-A) No. 2019-53917 discloses an electrochemical device (hereinafter also referred to as a "battery"). The battery includes an electrode body in which a positive electrode, a negative electrode, and a separator are stacked in a thickness direction such that the separator is interposed between the positive electrode and the negative electrode. The positive electrode has a positive electrode current collector and a positive electrode active material layer provided on the positive electrode current collector. The negative electrode has a negative electrode current collector and a special negative electrode active material layer provided on the negative electrode current collector. The positive electrode current collector has an exposed portion of the positive electrode current collector.The exposed portion of the positive electrode current collector is located at one end portion of the positive electrode, and the positive electrode current collector is exposed at this portion. The exposed portion of the positive electrode current collector is provided so that a part of it overlaps with the negative electrode, with the separator interposed therebetween in plan view. In the electrode body, a spacer portion is provided at an end portion where the exposed portion of the positive electrode current collector is positioned, a portion where an end portion of the exposed portion of the positive electrode current collector, positioned on the outer peripheral side of the electrode body, and the negative electrode overlap each other in plan view. The spacer portion has electrical insulation.The spacer portion is provided between the exposed portion of the positive electrode current collector and the separator to maintain a distance between the exposed portion of the positive electrode current collector and the separator in the lamination direction.

[0003] The positive electrode current collector and the negative electrode current collector are typically cut to specific dimensions. In this case, burrs protruding in the direction of their thickness may occur at the respective ends of the positive electrode current collector and the negative electrode current collector. JP-A No. 2019-53917 does not examine the arrangement of the positive electrode current collector and the negative electrode current collector with regard to the protrusion direction of the burrs of the positive electrode current collector and the negative electrode current collector. Therefore, there is a risk that the positive electrode current collector and the negative electrode current collector may physically touch due to burrs, which may cause a short circuit in the electrode body. SUMMARY

[0004] The present disclosure provides a battery that can suppress the occurrence of short circuits.

[0005] A first aspect of the present disclosure is a battery comprising: an electrode body having a plurality of positive electrodes, each having a positive electrode current collector, and a plurality of negative electrodes, each having a negative electrode current collector, wherein the plurality of positive electrodes and the plurality of negative electrodes are alternately stacked in a first direction with a separator provided therebetween; a laminate outer body accommodating the electrode body; a first strip projecting from the laminate outer body toward one side in a second direction orthogonal to the first direction, the first strip being electrically connected to a plurality of positive electrode current collectors;and a second stripe protruding from the laminate outer body in the second direction toward another side, the second stripe being electrically connected to a plurality of negative electrode current collectors, the positive electrode current collector having a first ridge protruding in the first direction at an edge on one side of the second stripe, the negative electrode current collector having a second ridge protruding in the first direction at an edge on one side of the first stripe, and wherein either of (A) and (B) is satisfied: (A) a plurality of first ridges does not include a pair of first ridges in which protrusion directions of adjacent first ridges are different, and a plurality of second ridges does not include a pair of second ridges in which protrusion directions of adjacent second ridges are different;or (B) a plurality of first ridges includes only a pair of first ridges in which projection directions of adjacent first ridges differ, and a plurality of second ridges includes only a pair of second ridges in which projection directions of adjacent second ridges differ.;

[0006] Here, the term "laminate outer body" refers to a housing made of a laminate film. "Laminate film" refers to a film comprising at least one metal layer, a first resin layer on one major surface of the metal layer, and a second resin layer on the other major surface of the metal layer.

[0007] When the positive electrode current collector and the negative electrode current collector are indistinguishable, the positive electrode current collector or the negative electrode current collector is hereinafter referred to simply as the "current collector." In a case where the first ridge and the second ridge are indistinguishable, the first ridge or the second ridge is simply referred to as the "ridge." When the first stripe and the second stripe are indistinguishable, the first stripe or the second stripe is simply referred to as the "stripe."

[0008] The battery of the first aspect satisfies conditions (A) or (B). In a case where the battery of the first aspect satisfies (A), in a battery having a laminate outer body with a single-can structure, the current collectors can be regularly arranged so that the protrusion directions of the ridges are aligned. As a result, adjacent positive electrode current collectors and negative electrode current collectors are less likely to physically contact each other than in a configuration where the current collectors are irregularly arranged. As a result, in the battery of the first aspect, the occurrence of a short circuit can be suppressed.In a case where the battery of the first aspect (B) satisfies, in batteries having a laminate outer body with a double-can structure, the position of a pair of ridges in the first direction may be set to the same position as the positions of the strips in the first direction. This regularly arranges the current collectors so that the protrusion directions of a plurality of ridges located on one side of the pair of ridges in the first direction are aligned in a specific direction. Furthermore, the current collectors may be regularly arranged so that the protrusion directions of a plurality of ridges located on the other side of the pair of ridges in the first direction are aligned in a direction opposite to the specific direction.As a result, adjacent positive electrode current collectors and negative electrode current collectors are less likely to physically contact each other than in a configuration where the current collectors are irregularly arranged. As a result, the occurrence of a short circuit can be suppressed in the battery of the first embodiment.

[0009] Here, "single-cup laminate outer body" refers to a single laminate outer body having a bend line, a cup portion (recessed portion) capable of accommodating the entire electrode body, and a flat portion, the flat portion covering the recess as a result of bending along the bend line. Furthermore, the term "double-cup laminate outer body" refers to a single laminate outer body having a bend line, a first cup portion (recessed portion) capable of accommodating a portion of an electrode body, and a second cup portion (recessed portion) capable of accommodating a portion of an electrode body, which can accommodate the entire electrode body in a space formed by overlapping the first cup portion and the second cup with each other by bending along the bend line.

[0010] In a second aspect of the present disclosure, the first aspect may further include a plurality of electrically insulating members covering each of the first ridges and the second ridges.

[0011] In the battery of the second aspect, compared to a configuration in which the electrically insulating members are not provided, the first ridge of the positive electrode current collector is less likely to physically contact the negative electrode current collector, and the second ridge of the negative electrode current collector is less likely to physically contact the positive electrode current collector. As a result, the occurrence of a short circuit can be more reliably suppressed in the battery of the second aspect.

[0012] In a third aspect of the present disclosure, in the above first or second aspect, the above condition (A) may be satisfied.

[0013] In the fourth aspect of the present disclosure, in the above first or second aspect, the above condition (B) may be satisfied.

[0014] According to the present disclosure, a battery is provided in which the occurrence of short circuits is suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Embodiments are described in detail with reference to the following figures, where: Fig. 1 is a front view of a battery according to a first embodiment of the present disclosure; Fig. 2 is a cross-sectional view along the line II-II in Fig. 1; Fig. 3 is a front view of a battery according to a second embodiment of the present disclosure; and Fig. 4 is a cross-sectional view along the line IV-IV in Fig. 3. DETAILED DESCRIPTION

[0016] In the following, exemplary embodiments of the present disclosure will be described in detail. These descriptions and examples illustrate exemplary embodiments and are not intended to limit the scope of the exemplary embodiments. Within the scope of the present disclosure, a combination of two or more preferred embodiments is a preferred embodiment. In the present disclosure, a numerical range expressed with "to" means a range in which the numerical values ​​described before and after "to" are included as lower and upper limit values. In numerical ranges that are specified stepwise in the present disclosure, the upper or lower limit specified in one numerical range may be replaced by the upper or lower limit of another numerical range that is specified stepwise.In the numerical ranges of the present disclosure, the upper or lower limit of a numerical range may be replaced by a value given in the examples.

[0017] Embodiments of the battery of the present disclosure will be described below with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and the description thereof will not be repeated. (1) First exemplary embodiment

[0018] As in Fig. As shown in FIG. 1, a battery 1A of a first embodiment of the present disclosure is provided with an electrode body 10A, a laminate outer body 20A, a positive electrode strip 30, which is an example of a first strip, a negative electrode strip 40, which is an example of a second strip, a non-aqueous electrolyte (not shown), and a plurality of electrically insulating members 50. The battery 1A has a rectangular parallelepiped shape.

[0019] In the present embodiment, the longitudinal direction of the main surface of the battery 1A is defined as the X-axis direction, the transverse direction of the main surface of the battery 1A is defined as the Y-axis direction, and the thickness direction of the battery 1A is defined as the Z-axis direction. The X-axis, the Y-axis, and the Z-axis are each orthogonal to each other. The Z-axis is an example of a first direction. The X-axis is an example of a second direction. The Y-axis is an example of a third direction. Note that these orientations do not limit the orientation of the battery of the present disclosure during use.

[0020] The laminate outer body 20A houses the electrode body 10A, the non-aqueous electrolyte solution, and the electrically insulating elements 50. The positive electrode strip 30 protrudes from the laminate outer body 20A in the positive direction of the X-axis. The negative electrode strip 40 protrudes from the laminate outer body 20A in the negative direction of the X-axis.

[0021] The length L1 of the battery 1A in the direction of the X-axis (see Fig. 1) is, for example, 530 mm to 600 mm. The length L2 of the battery 1A in the Y-axis direction (see Fig. 1) is, for example, 80 mm to 110 mm. The length L3 of the battery 1A in the direction of the Z-axis (see Fig. 2) is, for example, 7.0 mm to 9.0 mm. (1.1) Electrode body

[0022] The structure of the electrode body 10A is layered. As shown in Fig. 2, the electrode body 10A includes a plurality of positive electrodes 11, a plurality of negative electrodes 12, and a plurality of separators 13. In the electrode body 10A, a positive electrode 11 and a negative electrode 12 are alternately stacked along the Z-axis direction via a separator 13.

[0023] The number of the positive electrode 11, the negative electrode 12 and the separator 13 is not particularly limited and is appropriately selected in accordance with the use of the battery 1A. (1.1.1) Positive electrode

[0024] The positive electrode 11 has a positive electrode current collector 111A (e.g., aluminum foil) and a positive electrode active material layer 112 that is deposited on both surfaces of the positive electrode current collector 111A. The positive electrode active material layer 112 contains a positive electrode active material. The positive electrode active material releases lithium ions into the non-aqueous electrolyte or occupies lithium ions from it. The positive electrode active material may be a known positive electrode active material (e.g., LiNiO2 or LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2). The positive electrode active material layer 112 may also contain a known conductive material (e.g., carbon black), trilithium phosphate, and a known binder (e.g., polyvinylidene fluoride).

[0025] In the first embodiment, the plurality of positive electrode current collectors included in the electrode body 10A are formed only from the positive electrode current collector 111A. The positive electrode current collector 111A has a positive electrode ridge B111A, which is an example of a first ridge, at an edge on the negative electrode strip 40 side. The positive electrode ridge B111A protrudes in the negative direction along the Z-axis. The positive electrode ridges of the plurality of positive electrode current collectors included in the electrode body 10A do not include a pair of positive electrode ridges in which the protrusion directions of the adjacent positive electrode ridges are different. (1.1.2) Negative electrode

[0026] The negative electrode 12 has a negative electrode current collector 121A (e.g., copper foil) and a negative electrode active material layer 122 disposed on both surfaces of the negative electrode current collector 121A. The negative electrode active material layer 122 contains a negative electrode active material. The negative electrode active material, in conjunction with charging and discharging, traps lithium ions, which are charge carriers, from the non-aqueous electrolyte and releases them into the non-aqueous electrolyte. The negative electrode active material can be any known negative electrode active material (e.g., artificial graphite or lithium alloy (e.g., LiXM, where M represents C, Si, Sn, Sb, Al, Mg, Ti, Bi, Ge, Pb, or P, and X is a natural number)). The negative electrode active material layer 122 may also contain a known binder (e.g., a styrene-butadiene copolymer).

[0027] In the first embodiment, the plurality of negative electrode current collectors included in the electrode body 10A are formed only from the negative electrode current collector 121A. The negative electrode current collector 121A has a negative electrode ridge B121A, which is an example of a second ridge, at an edge on the side of the positive electrode strip 30. The negative electrode ridge B121A protrudes in the negative direction in the Z-axis direction. In the first embodiment, the negative electrode ridges of the plurality of negative electrode current collectors included in the electrode body 10A do not include a pair of negative electrode ridges in which the protrusion directions of the adjacent negative electrode ridges are different. (1.1.3) Separator

[0028] The separator 13 electrically insulates the positive electrode 11 and the negative electrode 12 and provides a lithium ion transfer path between the positive electrode active material layer 112 and the negative electrode active material layer 122. Examples of the separator 13 include a porous film. Examples of the porous film material include polyethylene and polypropylene. The separator 13 can have a single-layer structure or a multi-layer structure. (1.2) Laminate outer body

[0029] The laminate outer body 20A covers the electrode body 10A and seals the electrode body 10A and the nonaqueous electrolyte together with the positive electrode strip 30 and the negative electrode strip 40. In the first embodiment, the laminate outer body 20A is formed as a single can. The laminate outer body 20A is configured such that both the positive electrode strip 30 and the negative electrode strip 40 are positioned at an end portion on the side of the laminate outer body 20A in the negative direction of the Z-axis. The laminate outer body 20A includes a laminate sheet 21 and a plurality of strip films 22. Each of the plurality of strip films 22 is welded to the positive electrode strip 30 or the negative electrode strip 40 and to the laminate sheet 21. (1.2.1) Laminate film

[0030] The laminate film 21 has a metal layer, an inner resin layer, and an outer resin layer. The inner resin layer is laminated on the surface of the metal layer on the side of the electrode body 10A. The outer resin layer is applied to the surface of the metal layer on the side facing away from the electrode body 10A. The metal layer prevents gas (e.g., moisture or air) from entering and exiting outside the battery 1A and inside the battery 1A. The material of the metal layer is a metal (e.g., aluminum). The inner resin layer electrically insulates the electrode body 10A, the positive electrode strip 30, and the negative electrode strip 40 from the metal layer. The inner resin layer may contain a thermoplastic resin. The outer resin layer improves the durability of the laminate film 21. The outer resin layer may contain a thermoplastic resin.Examples of the thermoplastic resin of both the inner and outer resin layers are olefinic resins (e.g., polypropylene and polyethylene), polyvinyl chloride, and polyvinylidene chloride. (1.2.2) Strip film

[0031] The strip film 22 functions to electrically insulate the laminate film 21 from the positive electrode strip 30 and the negative electrode strip 40, and to bond the laminate film 21 to the positive electrode strip 30 and the negative electrode strip 40. The strip film 22 contains a thermoplastic resin. Examples of the thermoplastic resin of the strip film 22 include the same resins as the thermoplastic resins of the inner resin layer and the outer resin layer. (1.3) Positive electrode strips

[0032] The positive electrode strip 30 is electrically connected to the plurality of positive electrode current collectors 111A. Examples of the material of the positive electrode strip 30 include a metal (e.g., stainless steel (SUS)). The length L4 of the positive electrode strip 30 in the Y-axis direction (see Fig. 1) is, for example, 40 mm to 50 mm. (1.4) Negative electrode strips

[0033] The negative electrode strip 40 is electrically connected to the plurality of negative electrode current collectors 121A. Examples of the material of the negative electrode strip 40 include a metal (e.g., stainless steel (SUS)). The length L5 of the negative electrode strip 40 in the Y-axis direction (see Fig. 1) is, for example, 40 mm to 50 mm. (1.5) Non-aqueous electrolyte

[0034] The battery 1A is provided with a non-aqueous electrolyte. The non-aqueous electrolyte is housed in the laminate outer body 20A together with the electrode body 10A. It is sufficient that the non-aqueous electrolyte is a solution in which a carrier salt as an electrolyte (e.g., LiPF6) is dissolved or dispersed in a non-aqueous solvent (e.g., ethyl carbonate). The non-aqueous electrolyte may contain various additives (e.g., lithium bis(oxalato)borate). (1.6) Electrically insulating element

[0035] The battery 1A is provided with a plurality of electrically insulating members 50. In the first embodiment, the plurality of electrically insulating members 50 cover the positive electrode strip 30 of the positive electrode current collector 111A, which is located furthest in the negative Z-axis direction, and the negative electrode strip 40 of the negative electrode current collector 121A, which is located furthest in the negative Z-axis direction. The electrically insulating members 50 contain a thermoplastic resin. Examples of the thermoplastic resin of the electrically insulating member 50 include the same resins as the thermoplastic resins of the inner resin layer and the outer resin layer. (1.7) Use

[0036] The use of the 1A battery is not particularly limited, and examples include a power supply for a vehicle, a power supply for an information processing device (such as a personal computer or a smartphone), and a power supply for power storage. (1.8) Mechanism

[0037] As mentioned with reference to Fig. 1 and Fig. As described in Figure 2, a battery 1A is provided with an electrode body 10A, a laminate outer body 20A, a positive electrode strip 30, and a negative electrode strip 40. The battery 1A satisfies (A) below.

[0038] (A) The plurality of positive electrode ridges does not include a pair of positive electrode ridges having different protrusion directions among adjacent positive electrode ridges, and the plurality of negative electrode ridges does not include a pair of negative electrode ridges having different protrusion directions among adjacent negative electrode ridges.

[0039] As a result, the positive electrode current collectors 111A are regularly arranged so that the protrusion direction of the positive electrode ridges B111A is aligned with each other. This makes it less likely that adjacent positive electrode current collectors 111A and negative electrode current collectors 121A will physically contact each other than in a configuration where the positive electrode current collectors 111A are irregularly arranged. The same applies to the negative electrode current collector 121A. As a result, the occurrence of short circuits in the battery 1A can be suppressed.

[0040] As stated with reference to the Fig. 1 and Fig. 2, the battery 1A further includes an electrically insulating member 50. As a result, in the battery 1A, the positive electrode ridge B111A of the positive electrode current collector 111A is less likely to physically contact the negative electrode current collector 121A and the negative electrode ridge B121A of the negative electrode current collector 121A is less likely to physically contact the positive electrode current collector 111A than in a configuration where the electrically insulating member 50 is not provided. As a result, the occurrence of a short circuit in the battery 1A can be more reliably suppressed. (2) Second exemplary embodiment

[0041] The battery 1B of a second embodiment of the present disclosure is the same as the battery 1A of the first embodiment except that the laminate outer body mainly has a double-cup structure and the plurality of ridges includes a pair of ridges in which the protrusion directions of the ridges are different.

[0042] As in Fig. 3, the battery 1B is provided with an electrode body 10B, a laminate outer body 20B, a positive electrode strip 30, a negative electrode strip 40, a non-aqueous electrolyte (not shown), and a plurality of electrically insulating members 50. (2.1) Electrode body

[0043] The electrode body 10B is the same as the electrode body 10A, except that the plurality of ridges includes a pair of ridges having different protrusion directions.

[0044] In the second embodiment, the plurality of positive electrode current collectors included in the electrode body 10B include a plurality of positive electrode current collectors 111A and a plurality of positive electrode current collectors 111B. The positive electrode current collector 111B has a positive electrode ridge B111B. The positive electrode ridge B111B protrudes in the positive direction along the Z-axis. The plurality of positive electrode current collectors 111A are arranged on the positive direction side of the negative electrode strip 40 in the Z-axis direction. The plurality of positive electrode current collectors 111B are arranged on the negative direction side of the negative electrode strip 40 in the Z-axis direction. In other words, in the second embodiment, only a pair of positive electrode ridges (see Fig. 4) in which the protrusion directions of the adjacent positive electrode ridges are different. The pair of positive electrode ridges B111P includes a positive electrode ridge B111A of the positive electrode current collector 111A and a positive electrode ridge B111B of the positive electrode current collector 111B.

[0045] In the second embodiment, the plurality of negative electrode current collectors included in the electrode body 10B include a plurality of negative electrode current collectors 121A and a plurality of negative electrode current collectors 121B. The negative electrode current collector 121B has a negative electrode ridge B121B. The negative electrode ridge B121B protrudes in the positive direction along the Z-axis. The plurality of negative electrode current collectors 121A are arranged on the positive side of the positive electrode strip 30 in the Z-axis direction. The plurality of negative electrode current collectors 121B are positioned on the negative side of the positive electrode strip 30 along the Z-axis direction. In other words, in the second embodiment, only a pair of positive electrode ridges (see Fig. 4) in which the protrusion directions of the adjacent negative electrode ridges are different. The pair of negative electrode ridges B121P includes a negative electrode ridge B121A of the negative electrode current collector 121A and a negative electrode ridge B121B of the negative electrode current collector 121B (see Fig. 4). (2.2) Laminate outer body

[0046] The laminate outer body 20B is the same as the laminate outer body 20A of the first embodiment, except that it has a double-cup structure. The laminate outer body 20B is configured such that both the positive electrode strip 30 and the negative electrode strip 40 are arranged in the central region of the laminate outer body 20A in the Z-axis direction. (2.3) Electrically insulating element

[0047] The battery 1B is provided with a plurality of electrically insulating members 50. In the second embodiment, a plurality of electrically insulating members 50 cover the positive electrode strip 30 of the two positive electrode current collectors 111A positioned in the central portion in the Z-axis direction (the two positive electrode current collectors 111A closest to the negative electrode strip 40 in the Z-axis direction) and the negative electrode strip 40 of the negative electrode current collectors 121A positioned in the central portion in the Z-axis direction (the two negative electrode current collectors 121A closest to the positive electrode strip 30 in the Z-axis direction). (2.4) Mechanism

[0048] As in the Fig. 3 and Fig. As described in FIG. 4, the battery 1B is provided with the electrode body 10B, the laminate outer body 20B, the positive electrode strip 30, and the negative electrode strip 40. The plurality of positive electrode current collectors included in the electrode body 10B include a plurality of positive electrode current collectors 111A and a plurality of positive electrode current collectors 111B. The plurality of negative electrode current collectors included in the electrode body 10B include a plurality of negative electrode current collectors 121A and a plurality of negative electrode current collectors 121B. The battery 1B satisfies (B) below.

[0049] (B) A plurality of positive electrode ridges includes only one pair of positive electrode ridges B111P, and a plurality of negative electrode ridges includes only one pair of negative electrode ridges B121P.

[0050] Therefore, the positive electrode current collectors 111A are regularly arranged so that the protrusion directions of the plurality of negative electrode gates B111A positioned on the positive Z-axis side with respect to the pair of positive electrode ridges B111P are aligned in the negative Z-axis. Furthermore, the positive electrode current collectors 111B may be regularly arranged so that the protrusion directions of the plurality of negative electrode ridges B111B positioned on the negative Z-axis side with respect to the pair of positive electrode ridges B111P are aligned in the positive Z-axis direction. The negative electrode current collectors 121A are regularly arranged so that the protrusion directions of the plurality of negative electrode ridges B121A positioned on the Z-axis side in the positive direction with respect to the pair of negative electrode ridges B121P are aligned in the Z-axis in the negative direction.Furthermore, the negative electrode current collectors 121B are regularly arranged so that the protrusion directions of the plurality of negative electrode ridges B121B arranged in the negative Z-axis direction with respect to the pair of negative electrode ridges B121P are aligned in the positive Z-axis direction. Therefore, it is less likely than in a configuration where the positive electrode current collector 111A, the positive electrode current collector 111B, the negative electrode current collector 121A, and the negative electrode current collector 121B are each irregularly arranged that adjacent positive electrode current collectors and negative electrode current collectors physically contact each other. As a result, the occurrence of a short circuit in the battery 1B can be suppressed.

[0051] As stated with reference to the Fig. 3 and Fig.As described in Figure 4, the battery 1B further includes electrically insulating members 50. This makes it less likely for the positive electrode ridge of the positive electrode current collector to physically contact the negative electrode current collector, and for the negative electrode ridge of the negative electrode current collector to physically contact the positive electrode current collector, in the battery 1B, than in a configuration where the electrically insulating members 50 are not provided. As a result, the occurrence of short circuits in the battery 1B can be more reliably suppressed. (3) Example of a variant

[0052] Although battery 1A and battery 1B are each equipped with a plurality of electrically insulating elements 50, the present disclosure is not limited thereto. The battery of the present disclosure need not include a plurality of electrically insulating elements 50. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] JP 2019-53917 [0002, 0003]

Claims

[1] Battery with: an electrode body having a plurality of positive electrodes each having a positive electrode current collector and a plurality of negative electrodes each having a negative electrode current collector, wherein the plurality of positive electrodes and the plurality of negative electrodes are alternately stacked in a first direction with a separator provided therebetween; a laminate outer body that houses the electrode body; a first strip projecting from the laminate outer body toward one side in a second direction orthogonal to the first direction, the first strip being electrically connected to a plurality of the positive electrode current collectors; and a second strip projecting from the laminate outer body in the second direction toward another side, the second strip being connected to a plurality of the negative electrode current collectors, wherein the positive electrode current collector has a first ridge at an edge on one side of the second strip projecting in the direction of the first direction, wherein the negative electrode current collector has a second ridge at an edge on one side of the first strip projecting in the direction of the first direction, and either (A) or (B) is fulfilled: (A) a plurality of first ridges does not include a pair of first ridges in which projection directions of adjacent first ridges differ, and a plurality of second ridges does not include a pair of second ridges in which projection directions of adjacent second ridges differ; or (B) a plurality of first ridges includes only a pair of first ridges in which projection directions of adjacent first ridges differ, and a plurality of second ridges includes only a pair of second ridges in which projection directions of adjacent second ridges differ. [2] The battery according to claim 1, further comprising a plurality of electrically insulating members covering each of the first ridges and the second ridges. [3] A battery according to claim 1 or claim 2, wherein (A) is satisfied. [4] A battery according to claim 1 or claim 2, wherein (B) is satisfied.

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