JP2020030915A - Power storage device - Google Patents

Abstract

To provide a power storage device having a termination member that is hardly damaged even when the termination member is used in a state of being fixed to a fixed object.SOLUTION: A power storage device comprises a power storage element and a termination member 40 adjacent to the power storage element in a first direction, the termination member including a body 41 spreading in a surface direction orthogonal to the first direction and a fixation part 42 that is connected to a first end 41A, the body's end in a second direction orthogonal to the first direction, and is fixable to a fixed object. The body's second end 43 in a third direction orthogonal to the first direction and the second direction includes a first portion 431 including an end at a fixation part side in the second direction and a second portion 432 adjacent to the first portion in the second direction, the portions being bent at sides opposite to each other with respect to the body's portion adjacent to the second end in the third direction. A boundary part B between the first portion and the second portion is twisted.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a power storage device including a terminal member adjacent to a power storage element.

  BACKGROUND ART Conventionally, a battery module fixed to a wall of a housing or the like has been known (see Patent Document 1). Specifically, as shown in FIG. 8, the battery module includes a battery group 501A including a plurality of secondary batteries 501 arranged in one direction, and end plates 510 arranged on both sides of the battery group 501A. And

  The secondary battery 501 is, for example, a lithium ion secondary battery in which an electrode assembly is housed in a rectangular parallelepiped case. The end plate 510 is fixed to a wall 502a of the housing 502 with a bolt 503 and a nut 504, and restrains the plurality of secondary batteries 501 from both sides in the arrangement direction of the secondary batteries 501. The end plate 510 has an L shape. The end plate 510 has a holding portion 511 and a fixing portion 512 bent perpendicularly from one end of the holding portion 511. The fixing portion 512 has a plurality of insertion holes 513 through which the shaft portion 503a of the bolt 503 passes. A plurality of nuts 504 are fixed to the fixing portion 512 by welding so as to cover the insertion holes 513.

  When the battery module 500 is mounted on the housing 502, the battery module 500 is housed in the housing 502, and the nuts 504 fixed to the end plates 510 are aligned with the positions of the insertion holes 502b of the housing 502. Then, the shaft portion 503a of the bolt 503 is passed from the outside of the housing 502 through the insertion hole 502b of the housing 502 and the insertion hole 513 of the end plate 510 and screwed into the nut 504, and the bolt 503 is fastened to the nut 504. Thus, the battery module 500 is fixed to the housing 502.

  In the above-described battery module 500, when vibration is applied to the housing 502, the holding portion 511 is pressed by the battery group 501A because the secondary battery 501 vibrates in the arrangement direction due to the arrangement direction component of the vibration. At this time, since the fixing portion 512 is fixed to the housing 502, the end plate 510 tends to deform so that the holding portion 511 falls with the fixing portion 512 as a fulcrum, and thereby, the holding portion 511 side of the holding portion 512 is fixed. , Stress concentration occurs, and as a result, the end plate 510 may be damaged.

JP 2017-142942 A

  Therefore, an object of the present embodiment is to provide a power storage device in which the terminal member is hardly damaged even when the terminal member is used by being fixed to the object to be fixed.

The power storage device of the present embodiment includes:
A storage element,
A terminal member adjacent to the power storage element in the first direction,
The terminal member,
A main body extending along a surface direction orthogonal to the first direction;
A fixing portion that is connected to a first end portion of the main body that is an end portion in a second direction orthogonal to the first direction and that can be fixed to a fixing target,
At a second end of the main body, which is an end in the third direction orthogonal to the first direction and the second direction, a first portion including an end on the fixed portion side in the second direction, A second portion adjacent to the first portion in the direction bends to opposite sides with respect to the second end portion and the portion adjacent in the third direction of the main body, and the first portion and the second The boundary with the site is twisted.

  According to this configuration, since the boundary between the first portion and the second portion of the second end is twisted to have a spring property, the power storage device is fixed to the fixing target in a state where the fixing portion is fixed to the object to be fixed. When the terminal member tries to deform so that the main body is pressed by the power storage element by the vibration or the like and falls on the fixed portion as a fulcrum, the boundary portion extends (deforms so that the torsion returns), The stress caused by the pressing is absorbed, thereby suppressing damage to the terminal member.

In the power storage device,
The fixing portion extends along the first direction from an end in the third direction of the first end of the main body, and has a plate shape along a plane including the first direction and the third direction. Yes,
A third end of the fixing portion, which is an end on the second end side in the third direction, is continuous with the first portion, and the third end of the fixing portion and the third direction. May be bent to the side where the first part is located with respect to the adjacent part.

  According to this configuration, the end portion in the third direction (the first portion and the third end portion) of the end member including the boundary portion between the main body and the fixing portion is connected to the first end portion and the third end portion in a state of being continuous with the first portion. By bending the portion adjacent to each other in three directions, the strength of the boundary between the main body and the fixing portion can be secured.

  As described above, according to the present embodiment, it is possible to provide a power storage device in which the terminal member is hardly damaged even when the terminal member is used while being fixed to the object to be fixed.

FIG. 1 is a perspective view of a power storage device according to the present embodiment. FIG. 2 is an exploded perspective view of the power storage device. FIG. 3 is a perspective view of a terminal member provided in the power storage device. FIG. 4 is a view of the terminal member viewed from the X-axis direction. FIG. 5 is an enlarged perspective view of a position indicated by V in FIG. FIG. 6 is a sectional view taken along the line VI-VI in FIG. FIG. 7 is a sectional view taken along the line VII-VII in FIG. FIG. 8 is a longitudinal sectional view of a conventional battery module.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The names of the components (components) in the present embodiment are those in the present embodiment, and may be different from the names of the components (components) in the background art.

  As shown in FIGS. 1 and 2, the power storage device includes a power storage element 2, a holding member 4 including a terminal member 40 adjacent to the power storage element 2 in a predetermined direction (first direction), and holding the power storage element 2. , Is provided. The power storage device 1 includes an adjacent member 3 adjacent to the power storage element 2, an insulator 5 disposed between the power storage element 2 and the holding member 4, different power storage elements 2 or different power storage elements 2 and external input / output. A bus bar 6 that connects the terminals 47 and the like in a conductive manner. The power storage device 1 of the present embodiment includes a plurality of power storage elements 2 and a plurality of adjacent members 3, and the holding member 4 holds the plurality of power storage elements 2 and the plurality of adjacent members 3 collectively.

  The plurality of power storage elements 2 are arranged in the predetermined direction. Each of the plurality of power storage elements 2 is a primary battery, a secondary battery, a capacitor, or the like. The power storage element 2 of the present embodiment is a chargeable / dischargeable non-aqueous electrolyte secondary battery. More specifically, power storage element 2 is a lithium ion secondary battery that utilizes electron transfer that occurs with the movement of lithium ions. The electric storage element 2 is a so-called prismatic lithium ion secondary battery.

  Each of the plurality of power storage elements 2 includes an electrode body, a case 21 that houses the electrode body together with the electrolytic solution, and an external terminal 22 that is at least partially exposed outside the case 21.

  The case 21 includes a case main body 211 having an opening, and a plate-shaped lid plate 216 that closes (closes) the opening of the case main body 211. The case main body 211 of the present embodiment has a bottomed rectangular tube shape, and the case 21 has a flat rectangular parallelepiped shape. The case main body 211 includes a rectangular plate-shaped closing part 212 and a cylindrical body (peripheral wall) 213 connected to the periphery of the closing part 212. The body 213 has a flat rectangular tube shape. The body portion 213 has a pair of long wall portions 214 extending from the long side at the periphery of the closing portion 212 and a pair of short wall portions 215 extending from the short side at the periphery of the closing portion 212. By connecting the corresponding end portions of the pair of long wall portions 214 with the short wall portions 215, a flat rectangular tubular body portion 213 is formed. The cover plate 216 is a rectangular plate-shaped member that closes the opening of the case body 211. On the cover plate 216, a pair of external terminals 22 are arranged.

  In the power storage device 1 of the present embodiment, the plurality of power storage elements 2 are arranged in a state where the long wall portions 214 of the case 21 (the case main body 211) face each other.

  Hereinafter, the direction in which the plurality of power storage elements 2 are arranged (first direction) is defined as the X axis of the rectangular coordinate system, and the direction in which the short wall 215 of the case body 211 faces (the third direction) is defined as the Y axis of the rectangular coordinate system. The direction (second direction) in which the closing portion 212 and the cover plate 216 face each other is defined as the Z axis of the rectangular coordinate system.

  The adjacent member 3 is between the two power storage elements 2 arranged in the X-axis direction, or a member arranged in the X-axis direction with respect to the endmost power storage element 2 in the X-axis direction (an example of the present embodiment). Then, it is arranged between the holding member 4 and the terminating member 40). The adjacent member 3 is formed of an insulating member such as a resin. Further, the adjacent member 3 forms a flow path between the adjacent power storage elements 2 through which a fluid for adjusting the temperature of the power storage elements 2 can flow.

  The holding member 4 collectively holds the plurality of power storage elements 2 and the plurality of adjacent members 3 by surrounding the plurality of power storage elements 2 and the plurality of adjacent members 3. The holding member 4 is formed of a conductive member such as a metal. Specifically, the holding member 4 includes a pair of terminal members 40 arranged on both sides of the plurality of power storage elements 2 in the X-axis direction, and a connection member 44 that connects ends of the terminal members 40 in the Y-axis direction. Having. The holding member 4 has a fixing member 45 for fixing (connecting) the terminal member 40 and the connection member 44. The fixing member 45 of the present embodiment is a bolt 451 and a nut 452. In the power storage device 1 of the present embodiment, the pair of connecting members 44 connect the ends of the pair of terminal members 40 on both sides in the Y-axis direction.

  Each of the pair of terminal members 40 is arranged so as to sandwich the adjacent member 3 between the pair of terminal members 40 and the electric storage element 2 arranged at the end in the X-axis direction. Specifically, as shown in FIGS. 3 to 7, each of the terminal members 40 has a main body 41 that extends along a plane orthogonal to the X-axis direction (a plane including the Y-axis and the Z-axis: a YZ plane). And a fixing portion 42 which is connected to a first end portion 41A which is an end portion of the main body 41 on one side (lower side in FIG. 3) in the Z-axis direction and which can be fixed to a fixing target.

  The main body 41 has a first main body 411 that is a portion overlapping the power storage element 2 when viewed from the X-axis direction, and a second main body 412 extending from one end of the first main body 411 in the Z-axis direction.

  The first main body 411 is a rectangular portion corresponding to the power storage element 2 when viewed from the X-axis direction, and has holes 4111 penetrating in the X-axis direction at both ends in the Y-axis direction. A fixing member 45 (specifically, a bolt 451) for fixing the terminal member 40 and the connection member 44 is inserted into the hole 4111. In the first main body 411 of the present embodiment, two holes 4111 spaced in the Z-axis direction are arranged at one end and the other end in the Y-axis direction, respectively.

  In the first main body 411 of the present embodiment, a nut 452 that constitutes a fixing member 45 that connects the terminating member 40 and the connecting member 44 is arranged on the surface on the side of the power storage element 2. The nut 452 is welded to a position corresponding to the hole 4111 in the first main body 411.

  The second main body 412 is a part of the rectangular first main body 411 that extends from the side 411 a corresponding to the closed portion 212 of the power storage element 2. The main body 41 of the present embodiment has two second main bodies 412 arranged at intervals in the Y-axis direction. Each of these two second main bodies 412 extends from the both ends in the Y-axis direction at one end in the Z-axis direction of the first main body 411 to one side in the Z-axis direction. Each of the two second main bodies 412 of the present embodiment has a plate shape along the YZ plane.

  The end (second end) 43 of the main body 41 in the Y-axis direction is bent with respect to a part (adjacent part) 433 of the main body 41 that is adjacent to the second end 43 in the Y-axis direction. In the main body 41 of the present embodiment, each of the second end portions 43 on both sides in the Y-axis direction is bent with respect to the adjacent portion 433. Each of these two second end portions 43 includes a first portion 431 including one end portion (an end portion on the fixed portion 42 side) of the second end portion 43 in the Z-axis direction, and a first portion 431 in the Z-axis direction. It has a part 431 and an adjacent second part 432.

  The first portion 431 and the second portion 432 of each second end 43 are bent to opposite sides with respect to the adjacent portion 433. Specifically, the first portion 431 is a first rib portion that bends toward the outside in the X-axis direction (the side opposite to the power storage element 2) with respect to the adjacent portion 433 in order from the adjacent portion 433 toward the outside in the Y-axis direction. 431A and a second rib portion 431B that is bent outward in the Y-axis direction with respect to the first rib portion 431A (see FIGS. 5 and 6). The second portion 432 is bent inward in the X-axis direction (toward the power storage element 2) with respect to the adjacent portion 433. In the second portion 432 of the present embodiment, a notch 432A is formed at the center in the Z-axis direction. The notch 432A is located between two holes 4111 that are arranged at an interval in the Z-axis direction.

  Then, at the second end 43, the first portion 431 and the second portion 432 are continuous and bent to opposite sides (one side and the other side in the X-axis direction) with respect to the adjacent portion 433. The boundary part B between the first part 431 and the second part 432 is twisted (the direction is continuously changed: see FIGS. 3 and 5). This boundary portion B (the torsion at the second end portion 43 caused by the first portion 431 and the second portion 432 bending to the opposite sides with respect to the adjacent portion 433) is located at the center of the main body 41 in the Z-axis direction. It is formed on one side (the lower side in FIG. 3) from the position, more specifically, on the second main body 412.

  In the main body 41 of the present embodiment, the one end 4112 of the first main body 411 in the Z-axis direction and the inner end 4121 of each of the two second main bodies 412 in the Y-axis direction are outside the X-axis direction. Is bent towards.

  The fixing unit 42 is used to fix the power storage device 1 to an installation surface (an object to be fixed). The fixing portion 42 extends from the tip of the second main body 412 (the first end 41A of the main body 41) along the X-axis direction and has a plate-like shape along the XY plane (a plane including the X-axis and the Y-axis). Is the part. The fixing portions 42 of the present embodiment respectively extend outward from the respective distal ends of the two second main bodies 412 in the X-axis direction (in a direction away from the power storage element 2). Each fixing portion 42 has a hole 421 penetrating in the Z-axis direction. In a state where, for example, a bolt is inserted through the hole 421, the bolt is screwed into a screw hole provided on the installation surface and tightened, so that the power storage device 1 is fixed to the installation surface.

  The outer end portion (third end portion) 422 of the fixing portion 42 in the Y-axis direction is bent with respect to a portion (adjacent portion) 423 of the fixing portion 42 adjacent to the third end portion 422 in the Y-axis direction. I have. The third end portion 422 of the present embodiment is continuous with the first portion 431 and on the side where the first portion 431 is located with respect to the adjacent portion 423 (in the example of the present embodiment, the other side in the Z-axis direction: FIG. (Upper side).

  Here, “the third end portion 422 is bent on the side where the first portion 431 is located with respect to the adjacent portion 423” means that the main body 41 and the fixing portion 42 are straightened along the Z-axis direction. (When the direction in which the edge of the adjacent portion 433 of the main body 41 in the Y-axis direction extends and the direction in which the edge of the adjacent portion 423 of the fixing portion 42 in the Y-axis direction extends coincides with each other) ), That the third end 422 bends (is positioned) on the side where the first part 431 is bent with respect to the adjacent parts 433 and 423 (where the first part 431 is located).

  Specifically, the third end 422 bends toward the other side in the Z-axis direction with respect to the adjacent part 423 in order from the adjacent part 423 toward the outside in the Y-axis direction, and A third rib portion 422A that is continuous with the portion 431A, a fourth rib portion 422B that is bent outward with respect to the third rib portion 422A in the Y-axis direction and is continuous with the second rib portion 431B of the first portion 431, (See FIGS. 5 and 7).

  The inner end 424 in the Y-axis direction of each fixing portion 42 is bent toward the other side in the Z-axis direction. The inner end portion 424 of each fixing portion 42 is continuous with the end portions 4112 and 4121 of the main body 41, and together with the respective end portions 4112 and 4121 of the main body 41, constitutes the inner rib portion 41R of the terminal member 40.

  As shown in FIGS. 1 and 2, each of the pair of terminal members 40 configured as described above is in contact with the adjacent member 3 on both outer sides of the plurality of power storage elements 2 arranged in the X-axis direction. The adjacent member 3 is disposed so as to be sandwiched between the power storage element 2 (specifically, the power storage element 2 disposed on the outermost side in the X-axis direction).

  The pair of connection members 44 are arranged on both sides of the plurality of power storage elements 2 in the Y-axis direction. Each of the pair of connection members 44 includes a connection member main body 441 extending in the X-axis direction along each short wall portion 215 of the plurality of power storage elements 2, and an end on the other side in the Z-axis direction of the connection member main body 441. Extending along the Y-axis direction from the first extending portion 442 (extending along the respective closed portions 212 of the plurality of power storage elements 2), and a second extending from the first extending portion 442 to one side in the Z-axis direction. And an extension 443. In addition, each of the pair of connecting members 44 has a connected portion 444 extending in the Y-axis direction along a surface of the terminal member 40 facing outward in the X-axis direction from an end in the X-axis direction of the connecting member main body 441. . The connecting member 44 of the present embodiment has connected portions 444 at both ends in the X-axis direction. That is, each of the pair of connection members 44 has a pair of connected portions 444.

  Each of the pair of connected portions 444 is a portion connected to the end of the terminal member 40 (specifically, the first main body 411) in the Y-axis direction in the connection member 44. The connected portion 444 is a plate-shaped portion that extends along the YZ plane and is elongated in the Z-axis direction, and is disposed at a position corresponding to the second portion 432 of the second end 43 in the Z-axis direction. Have been. Further, the connected portion 444 has a hole 4441 at a position corresponding to the hole 4111 provided at the end of the terminal member 40 in the Y-axis direction (a position overlapping when viewed from the X-axis direction). In the terminal member 40 of the present embodiment, since two holes 4111 arranged at intervals in the Z-axis direction are provided at each end in the Y-axis direction, each connected portion 444 is also provided in the Z-axis direction. Are provided with two holes 4441 spaced apart from each other.

  In the power storage device 1 of the present embodiment, the bolt 451 constituting the fixing member 45 is inserted into the hole 4441 of the connected portion 444 of the connecting member 44 and the hole 4111 of the terminal member 40, and the power storage element 2 side of the terminal member 40. Is screwed into the nut 452 arranged on the surface of the connecting member 44 and tightened, whereby the connected portion 444 of the connecting member 44 and the terminal member 40 are connected (fixed).

  The insulator 5 has insulating properties, and is arranged between the connection member 44 and the plurality of power storage elements 2. The insulator 5 covers at least a region of the connection member 44 facing the plurality of power storage elements 2. Specifically, the insulator 5 of the present embodiment includes a surface of the connection member main body 441 facing each power storage element 2, a surface of the first extension 442 facing each power storage element 2, and a second extension 443. At least a surface facing inward in the Y-axis direction. As a result, the insulator 5 insulates the connection member 44 from the plurality of power storage elements 2.

  The bus bar 6 is a plate-shaped member having conductivity such as metal. Bus bar 6 conducts between external terminals 22 of power storage element 2 or between external terminal 22 of power storage element 2 and external input / output terminal 47. A plurality of bus bars 6 are provided in power storage device 1 (the number corresponds to the number of power storage elements 2 and the number of external input / output terminals 47). The plurality of bus bars 6 of the present embodiment connect (conduct) all of the plurality of power storage elements 2 included in the power storage device 1 in series.

  According to the above power storage device 1, since the boundary portion B between the first portion 431 and the second portion 432 of the second end portion 43 is twisted to have a spring property, the fixing portion 42 has the installation surface (fixed portion). When vibration or the like is applied to the power storage device 1 in a state where the terminal member 40 is fixed to the target object, the main body 41 is pressed by the power storage element 2 and the terminal member 40 is deformed so as to fall on the fixing portion 42 as a fulcrum. When the portion B extends (that is, deforms so that the torsion returns), the stress caused by the pressing is absorbed, and thereby the damage of the terminal member 40 is suppressed.

  Further, in the power storage device 1 of the present embodiment, the third end 422 of the fixing part 42 is continuous with the first part 431 of the second end 43 of the main body 41, and is adjacent to the adjacent part 423 of the fixing part 42. And is bent to the side where the first portion 431 is located. As described above, the ends in the Y-axis direction (the first portion 431 and the third end 422) of the terminal member 40 including the boundary between the main body 41 and the fixing portion 42 are adjacent to the ends in the Y-axis direction. By bending (forming a so-called rib shape) with respect to the portions (adjacent portions 433 and 423), it is possible to ensure the strength of the boundary portion (bent portion) between the main body 41 and the fixing portion 42. it can.

  It should be noted that the power storage device of the present invention is not limited to the above embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention. For example, the configuration of another embodiment can be added to the configuration of one embodiment, and a part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Further, a part of the configuration of an embodiment can be deleted.

  In the power storage device 1 of the above embodiment, the second ends 43 where the boundary B between the first part 431 and the second part 432 are twisted are arranged at both ends of the terminal member 40 in the Y-axis direction. However, the present invention is not limited to this configuration. The second end 43 where the boundary B between the first part 431 and the second part 432 is twisted may be formed only at one end of the terminal member 40 in the Y-axis direction. With such a configuration as well, when the main body 41 of the terminal member 40 is pressed by the power storage element 2, the boundary portion B expands (is deformed so that the torsion returns), thereby absorbing the stress caused by the pressing. . Thereby, damage to the terminal member 40 is suppressed.

  The position of the boundary portion B at the second end 43 is not limited. When the main body 41 is pushed by the electric storage element 2 and the terminal member 40 is deformed so as to fall on the fixing part 42 as a fulcrum while the fixing part 42 is fixed to the installation surface (fixed object), the terminal member 40 In order to absorb the stress generated around the fixing portion 42 and effectively suppress the stress concentration at the portion (around the fixing portion 42), the twisted boundary portion B is formed by the fixing portion at the second end 43. It is preferable to be arranged at a position close to 42.

  However, if the torsion-shaped boundary portion B is disposed at any position in the Z-axis direction at the second end portion 43, the boundary portion B has a spring property, so that the power storage element may be vibrated or the like. When a force is applied to the terminal member 40 from the second member or the like, the boundary portion B is deformed so that the torsion returns, thereby absorbing the stress generated around the boundary portion B in the terminal member 40. Thereby, damage to the terminal member 40 is suppressed.

  In the power storage device 1 of the above embodiment, the third end 422 of the fixing portion 42 is bent with respect to the adjacent portion 423 in a state of being continuous with the first portion 431 of the second end 43, but is not limited to this configuration. . The third end 422 of the fixing portion 42 may not be bent with respect to the adjacent portion 423, that is, may have a straight configuration.

  Further, in the power storage device 1 of the above embodiment, the first portion 431 is bent outward in the X-axis direction with respect to the adjacent portion 433, and the second portion 432 is directed inward in the X-axis direction with respect to the adjacent portion 433. But is not limited to this configuration. The first portion 431 may be bent inward in the X-axis direction with respect to the adjacent portion 433, and the second portion 432 may be bent outward in the X-axis direction with respect to the adjacent portion 433. In this case, the third end 422 of the fixing portion 42 is bent to one side in the Z-axis direction.

  Further, in the power storage device 1 of the above embodiment, one boundary portion B (twisted portion) is disposed at the second end 43, but a plurality of boundary portions B may be disposed. In this case, in the second end portion 43, a portion that bends outward in the X-axis direction with respect to the adjacent portion 433 (a portion corresponding to the first portion 431) and a portion that bends inward (corresponds to the second portion 432). Are alternately arranged in the Z-axis direction.

  In the power storage device 1 of the above embodiment, the twisted end portion (boundary portion B) is disposed at the outer end portion (second end portion 43) of the main body 41 in the Y-axis direction. It is not limited to. For example, the end portion (boundary portion B) of the twist shape may be arranged inside the second main body 412 in the Y-axis direction. That is, the twisted end portion (boundary portion B) may be provided at the end portion 4121 of the second main body 412 that forms the inner rib portion 41R.

  In the power storage device 1 of the above embodiment, in the terminal member 40, the fixing portion 42 extends outward in the X-axis direction with respect to the main body 41, but is not limited to this configuration. The fixing portion 42 may extend inward in the X-axis direction with respect to the main body 41.

  The fixing portion 42 extends in a direction perpendicular to the main body 41 (the normal direction of the main body 41: the X-axis direction in the example of the embodiment), but in a direction inclined with respect to the main body 41 (the above-described direction). (A direction intersecting with the normal direction).

  Further, in the power storage device 1 of the above embodiment, in the main body 41 of the terminal member 40, a space is formed between the two second main bodies 412, that is, a shape in which a part of the main body 41 is cut away. However, the present invention is not limited to this configuration. The main body 41 may have a shape without a notch such as a rectangular shape.

  Further, in the above-described embodiment, the case where the power storage element is used as a chargeable / dischargeable non-aqueous electrolyte secondary battery (for example, a lithium ion secondary battery) has been described. However, the type and size (capacity) of the power storage element are arbitrary. It is. Further, in the above embodiment, a lithium ion secondary battery has been described as an example of a power storage element, but the present invention is not limited to this. For example, the present invention can be applied to various secondary batteries, primary batteries, and power storage elements of capacitors such as electric double layer capacitors.

  DESCRIPTION OF SYMBOLS 1 ... Power storage device, 2 ... Power storage element, 21 ... Case, 211 ... Case main body, 212 ... Closed part, 213 ... Body part, 214 ... Long wall part, 215 ... Short wall part, 216 ... Cover plate, 22 ... External terminal, Reference numeral 3 ... adjacent member, 4 ... holding member, 40 ... terminal member, 41 ... main body, 41A ... first end, 41R ... inner rib portion, 411 ... first main body, 411a ... side, 4111 ... hole, 4112 ... first End of main body, 412: Second main body, 4121: End of second main body, 42: Fixed portion, 421: Hole, 422: Third end, 422A: Third rib portion, 422B: Fourth rib portion, 423: an adjacent portion of the third end portion, 424: an inner end portion of the fixing portion, 43: a second end portion, 431 ... a first portion, 431A ... a first rib portion, 431B ... a second rib portion, 432 ... Two parts, 433 ... A part adjacent to the second end, 44 ... Connection member, 441 ... Connection member book , 442: first extending portion, 443: second extending portion, 444: connected portion, 4441: hole, 45: fixing member, 451: bolt, 452: nut, 47: external input / output terminal, 5 ... Insulator, 6 busbar, 500 battery module, 501 secondary battery, 501A battery group, 502 housing, 502a wall, 502b insertion hole, 503 bolt, 503a shaft part, 504 nut, 510 ... End plate, 511 ... Nipping part, 512 ... Fixed part, 513 ... Insertion hole, B ... Boundary part

Claims (2)

A storage element,
A terminal member adjacent to the power storage element in the first direction,
The terminal member,
A main body extending along a surface direction orthogonal to the first direction;
A fixing portion that is connected to a first end portion of the main body that is an end portion in a second direction orthogonal to the first direction and that can be fixed to a fixing target,
At a second end of the main body, which is an end in the third direction orthogonal to the first direction and the second direction, a first portion including an end on the fixed portion side in the second direction, A second portion adjacent to the first portion in the direction, the second portion in the main body and a portion adjacent to the portion adjacent in the third direction in the third direction are bent to opposite sides, and the first portion and the second A power storage device in which the boundary with the site is twisted. The fixing portion extends along the first direction from an end in the third direction of the first end of the main body, and has a plate shape along a plane including the first direction and the third direction. Yes,
A third end of the fixing portion, which is an end on the second end side in the third direction, is continuous with the first portion, and the third end of the fixing portion and the third direction. 2. The power storage device according to claim 1, wherein the power storage device is bent to a side where the first part is located with respect to an adjacent part.