JP7174345B2 - power storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power storage device including a terminating member adjacent to a power storage element.

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

The secondary battery 501 is, for example, a lithium ion secondary battery in which an electrode assembly is accommodated in a rectangular parallelepiped case. The end plate 510 is fixed to the wall 502a of the housing 502 with bolts 503 and nuts 504, and restrains the plurality of secondary batteries 501 from both sides in the direction in which the secondary batteries 501 are arranged. The end plate 510 is L-shaped. The end plate 510 has a holding portion 511 and a fixing portion 512 vertically bent from one end of the holding portion 511 . The fixing portion 512 is provided with a plurality of insertion holes 513 through which the shaft portions 503a of the bolts 503 pass. A plurality of nuts 504 are fixed to the fixing portion 512 by welding so as to cover the insertion holes 513 .

When attaching the battery module 500 to the housing 502 , the battery module 500 is accommodated in the housing 502 and the nuts 504 fixed to the end plates 510 are aligned with the insertion holes 502 b of the housing 502 . Then, the shaft portion 503a of the bolt 503 is passed through the insertion hole 502b of the housing 502 and the insertion hole 513 of the end plate 510 from the outside of the housing 502 and screwed with the nut 504, and the bolt 503 is tightened to the nut 504. Thereby, the battery module 500 is fixed to the housing 502 .

In the battery module 500 described above, when the casing 502 is vibrated, the secondary battery 501 vibrates in the array direction due to the array direction component of the vibration, and the clamping portion 511 is pressed by the battery group 501A. At this time, since the fixed portion 512 is fixed to the housing 502, the end plate 510 tries to deform so that the holding portion 511 falls down with the fixed portion 512 as a fulcrum, and as a result, the holding portion 511 is moved toward the fixed portion 512 side. In some cases, stress concentration occurs at , resulting in damage to the end plate 510 .

JP 2017-142942 A

Therefore, an object of the present embodiment is to provide a power storage device in which the terminating member is less likely to be damaged even when the terminating member is fixed to an object to be fixed and used.

The power storage device of this embodiment is
a storage element;
a terminating member adjacent to the power storage element in the first direction,
The termination member
a main body extending along a plane direction orthogonal to the first direction;
a fixing part that is connected to a first end that is an end of the main body in a second direction perpendicular to the first direction and that can be fixed to an object to be fixed;
At the second end portion of the main body, which is the end portion in the third direction perpendicular to the first direction and the second direction, the first portion including the end portion on the fixing portion side in the second direction, the second The first portion and the second portion adjacent in the direction are bent opposite to each other with respect to the second end portion of the main body and the portion adjacent in the third direction, and the first portion and the second portion The boundary with the part is twisted.

According to this configuration, since the boundary portion between the first portion and the second portion of the second end portion is twisted and has a spring property, the power storage device can be attached to the power storage device while the fixing portion is fixed to the object to be fixed. When vibration or the like causes the body to be pressed against the power storage element and the terminating member attempts to deform such that it falls down on the fixed portion as a fulcrum, the boundary portion extends (deforms so as to untwist). The stresses resulting from said pressing are absorbed, thereby reducing damage to the termination member.

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

According to this configuration, the ends (the first portion and the third end) of the termination member in the third direction, including the boundary portion between the main body and the fixing portion, are connected to the first portion and connected to the end portion and the third end. By bending with respect to the adjacent parts in three directions, it is possible to secure the strength of the boundary between the main body and the fixed part.

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

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

An embodiment of the present invention will be described below with reference to FIGS. 1 to 7. FIG. The name of each component (each component) of this embodiment is the one in this embodiment, and may differ from the name of each component (each component) in the background art.

As shown in FIGS. 1 and 2, the power storage device includes a power storage element 2 and a holding member 4 that includes a terminal member 40 adjacent to the power storage element 2 in a predetermined direction (first direction) and holds the power storage element 2. , provided. In addition, 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, and an insulator 5 arranged between the power storage element 2 and the holding member 4. and a bus bar 6 electrically connected to the terminal 47 and the like. A power storage device 1 of the present embodiment includes a plurality of power storage elements 2 and a plurality of adjacent members 3, and a holding member 4 holds the plurality of power storage elements 2 and the plurality of adjacent members 3 together.

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

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

The case 21 has a case body 211 having an opening and a plate-like cover plate 216 that closes (closes) the opening of the case body 211 . The case main body 211 of this embodiment is in the shape of a square tube with a bottom, and the case 21 is in the shape of a flat rectangular parallelepiped. The case main body 211 includes a rectangular plate-like closing portion 212 and a cylindrical trunk portion (peripheral wall) 213 connected to the peripheral edge of the closing portion 212 . The trunk portion 213 has a flat rectangular tubular shape. The trunk portion 213 has a pair of long wall portions 214 extending from the long sides of the peripheral edge of the closing portion 212 and a pair of short wall portions 215 extending from the short sides of the peripheral edge 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 , the body portion 213 in the shape of a flat rectangular tube is formed. The cover plate 216 is a rectangular plate-like member that closes the opening of the case body 211 . A pair of external terminals 22 are arranged on the cover plate 216 .

In the power storage device 1 of the present embodiment, the plurality of power storage elements 2 are arranged with the long wall portions 214 of the case 21 (case body 211) facing each other.

Hereinafter, the direction in which the plurality of storage elements 2 are arranged (first direction) is defined as the X-axis of the orthogonal coordinate system, and the direction in which the short wall portions 215 of the case body 211 face each other (the third direction) is defined as the Y-axis of the orthogonal 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 orthogonal coordinate system.

The adjacent member 3 is arranged between two storage elements 2 arranged in the X-axis direction, or between the storage element 2 at the end in the X-axis direction and a member aligned in the X-axis direction with respect to the storage element 2 (example of this embodiment). , is arranged between the end member 40) included in the holding member 4). The adjacent member 3 is made of an insulating member such as resin. Further, the adjacent member 3 forms a channel through which the fluid for adjusting the temperature of the storage element 2 can flow between the adjacent storage element 2 .

The holding member 4 surrounds the plurality of storage elements 2 and the plurality of adjacent members 3 to collectively hold the plurality of storage elements 2 and the plurality of adjacent members 3 . The holding member 4 is made of a conductive member such as metal. Specifically, the holding member 4 includes a pair of terminating members 40 arranged on both sides of the plurality of power storage elements 2 in the X-axis direction, a connecting member 44 connecting the ends of the terminating members 40 in the Y-axis direction, have The holding member 4 also has a fixing member 45 that fixes (connects) the terminal member 40 and the connecting member 44 . The fixing member 45 of this 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 connects the ends of the pair of terminal members 40 on both sides in the Y-axis direction.

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

The main body 41 has a first main body 411 that overlaps with the storage element 2 when viewed in the X-axis direction, and a second main body 412 that extends 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 storage element 2 when viewed in 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 connecting member 44 is inserted through the hole 4111 . In the first main body 411 of this embodiment, two holes 4111 spaced apart 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 the fixing member 45 that connects the terminal member 40 and the connection member 44 is arranged on the surface on the power storage element 2 side. This nut 452 is welded at a position corresponding to the hole 4111 in the first body 411 .

The second main body 412 is a portion of the rectangular first main body 411 extending from the side 411 a corresponding to the closed portion 212 of the storage element 2 . The main body 41 of this embodiment has two second main bodies 412 spaced apart in the Y-axis direction. Each of these two second bodies 412 extends to one side in the Z-axis direction from both ends in the Y-axis direction at one end of the first body 411 in the Z-axis direction. Each of the two second bodies 412 of this embodiment is plate-shaped along the YZ plane.

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

The first portion 431 and the second portion 432 of each second end portion 43 are bent opposite to each other with respect to the adjacent portion 433 . Specifically, the first portion 431 is a first rib portion that bends outward in the X-axis direction (opposite to the storage element 2) with respect to the adjacent portion 433 in order from the adjacent portion 433 outward in the Y-axis direction. 431A and a second rib portion 431B that curves outward in the Y-axis direction with respect to the first rib portion 431A (see FIGS. 5 and 6). In addition, the second portion 432 is bent toward the inside in the X-axis direction (toward the power storage element 2 ) with respect to the adjacent portion 433 . A notch 432A is formed in the central portion in the Z-axis direction of the second portion 432 of the present embodiment. The notch 432A is positioned between two holes 4111 spaced apart in the Z-axis direction.

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

In the main body 41 of the present embodiment, the end portion 4112 on one side in the Z-axis direction of the first main body 411 and the inner end portions 4121 in the Y-axis direction of the two second main bodies 412 are arranged on the outer side in the X-axis direction. bent towards.

Fixing portion 42 is used to fix power storage device 1 to an installation surface (fixed object). 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 shape along the XY plane (a plane including the X-axis and the Y-axis). is the part of The fixing portion 42 of the present embodiment extends outward in the X-axis direction (direction away from the power storage element 2) from each tip of the two second main bodies 412. As shown in FIG. Each fixed portion 42 has a hole 421 penetrating in the Z-axis direction. A bolt, for example, is inserted through the hole 421, and the bolt is screwed into a screw hole provided in the installation surface and tightened, thereby fixing the power storage device 1 to the installation surface.

An outer end (third end) 422 of the fixed portion 42 in the Y-axis direction is bent with respect to a portion (adjacent portion) 423 of the fixed portion 42 adjacent to the third end 422 in the Y-axis direction. there is The third end portion 422 of the present embodiment is continuous with the first portion 431 and 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. 3 (upper side in ).

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 Y-axis direction edge of the adjacent portion 433 of the main body 41 extends coincides with the direction in which the Y-axis direction edge of the adjacent portion 423 of the fixed portion 42 extends, ), and the third end portion 422 is bent (located) on the side where the first portion 431 is bent with respect to the adjacent portions 433 and 423 (where the first portion 431 is located).

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

In addition, an inner end portion 424 in the Y-axis direction of each fixed 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 constitutes the inner rib portion 41R of the termination member 40 together with the respective end portions 4112 and 4121 of the main body 41 .

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

A 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 the short wall portion 215 of each of the plurality of power storage elements 2 and an end portion of the connection member main body 441 on the other side in the Z-axis direction. a first extending portion 442 extending along the Y-axis direction from the first extending portion 442 (extending along the closed portion 212 of each of the plurality of power storage elements 2); and an extension portion 443 . Each of the pair of connection members 44 has a connected portion 444 extending in the Y-axis direction from the end of the connection member body 441 in the X-axis direction along the surface of the termination member 40 facing outward in the X-axis direction. . 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 connecting members 44 has a pair of connected portions 444 .

Each of the pair of connected portions 444 is a portion of the connection member 44 that is connected to an end portion of the terminal member 40 (specifically, the first main body 411) in the Y-axis direction. The connected portion 444 is a plate-like portion extending along the YZ plane and elongated in the Z-axis direction, and is arranged at a position corresponding to the second portion 432 of the second end portion 43 in the Z-axis direction. It is The connected portion 444 also 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 (overlapping position when viewed from the X-axis direction). In the terminating member 40 of this embodiment, two holes 4111 are provided at each end in the Y-axis direction and spaced apart in the Z-axis direction. There are two holes 4441 spaced apart.

In the power storage device 1 of the present embodiment, the bolt 451 constituting the fixing member 45 is inserted through the hole 4441 of the connected portion 444 of the connection member 44 and the hole 4111 of the termination member 40, and the power storage element 2 side of the termination member 40 is inserted. The connected portion 444 of the connecting member 44 and the terminating member 40 are connected (fixed) by screwing and tightening the nut 452 disposed on the surface of the connecting member 44 .

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

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

According to the power storage device 1 described above, since the boundary portion B between the first portion 431 and the second portion 432 of the second end portion 43 is twisted and has a spring property, the fixing portion 42 is placed on the installation surface (fixing surface). Vibration or the like is applied to the power storage device 1 in a state where the power storage device 1 is fixed to the target object), and when the main body 41 is pressed by the power storage element 2 and the terminal member 40 tries to deform so as to fall down with the fixing portion 42 as a fulcrum, the boundary The portion B expands (that is, deforms so as to untwist) to absorb the stress caused by the pressing, thereby suppressing damage to the termination member 40 .

Further, in the power storage device 1 of the present embodiment, the third end portion 422 of the fixing portion 42 is continuous with the first portion 431 of the second end portion 43 of the main body 41 and is connected to the adjacent portion 423 of the fixing portion 42 . is bent toward the side where the first portion 431 is located. In this way, the ends in the Y-axis direction (the first part 431 and the third end 422) of the termination member 40 including the boundary between the main body 41 and the fixing part 42 are adjacent to the ends in the Y-axis direction. By bending (constituting a so-called rib shape) with respect to the parts (adjacent parts 433, 423), the strength of the boundary part (bent part) between the main body 41 and the fixed part 42 can be ensured. can.

It should be noted that the power storage device of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, and part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, some of the configurations of certain embodiments can be deleted.

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

The position of the boundary portion B in the second end portion 43 is not limited. When the main body 41 is pushed by the power storage element 2 in a state where the fixed portion 42 is fixed to the installation surface (fixed object) and the terminating member 40 is about to be deformed so as to fall down with the fixing portion 42 as a fulcrum, the terminating member 40 In order to absorb the stress generated around the fixing portion 42 of the second end portion 43 and effectively suppress the stress concentration at the portion (around the fixing portion 42), the twisted boundary portion B It is preferably positioned close to 42 .

However, if the twisted boundary portion B is arranged at any position in the Z-axis direction at the second end portion 43, the boundary portion B has a spring property, so that vibration or the like causes the power storage element to move. When a force is applied to the termination member 40 from 2 or the like, the boundary portion B is deformed so that the twist is restored, thereby absorbing the stress generated around the boundary portion B in the termination member 40 . As a result, damage to the termination member 40 is suppressed.

In the power storage device 1 of the above-described embodiment, the third end portion 422 of the fixing portion 42 is bent with respect to the adjacent portion 423 so as to be continuous with the first portion 431 of the second end portion 43, but the present invention is not limited to this configuration. . The third end 422 of the securing portion 42 may be of a non-bending or straight configuration with respect to the adjacent portion 423 .

In addition, 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 bent inward in the X-axis direction with respect to the adjacent portion 433. but 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 portion 422 of the fixed portion 42 bends to one side in the Z-axis direction.

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

In addition, in the power storage device 1 of the above-described embodiment, the twisted end portion (boundary portion B) is arranged at the outer end portion (second end portion 43) of the main body 41 in the Y-axis direction. is not limited to For example, the twisted end portion (boundary portion B) 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 constitutes the inner rib portion 41R.

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

Further, the fixed 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 above embodiment), but is inclined with respect to the main body 41 (the above-mentioned direction intersecting the normal direction).

In addition, in the power storage device 1 of the above-described embodiment, a space is formed between the two second main bodies 412 in the main body 41 of the termination member 40, that is, the main body 41 is partially cut out. is not limited to this configuration. The main body 41 may have a shape without notches, such as a rectangular shape.

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

REFERENCE SIGNS LIST 1 power storage device 2 power storage element 21 case 211 case body 212 closing portion 213 trunk portion 214 long wall portion 215 short wall portion 216 lid plate 22 external terminal, 3 Adjacent member 4 Holding member 40 Terminal member 41 Main body 41A First end 41R Inner rib 411 First main body 411a Side 4111 Hole 4112 First Body end 412 Second body 4121 Second body end 42 Fixing part 421 Hole 422 Third end 422A Third rib 422B Fourth rib 423... Adjacent portion of third end portion 424... Inner end portion of fixing portion 43... Second end portion 431... First portion 431A... First rib portion 431B... Second rib portion 432... Second rib portion Two parts, 433... adjoining part of the second end part, 44... connection member, 441... connection member body, 442... first extension part, 443... second extension part, 444... connected part, 4441... hole, 45... Fixing member 451... Bolt 452... Nut 47... External input/output terminal 5... Insulator 6... Bus bar 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... Clamping part 512... Fixing part 513... Insertion hole B... Boundary part

Claims (2)

a storage element;
a terminating member adjacent to the power storage element in the first direction,
The termination member
a main body extending along a plane direction orthogonal to the first direction;
a fixing part that is connected to a first end that is an end of the main body in a second direction perpendicular to the first direction and that can be fixed to an object to be fixed;
A second end portion of the main body, which is an end portion in a third direction orthogonal to the first direction and the second direction, is a plate-like portion elongated in the second direction and fixed in the second direction. Including a first portion including an end portion on the side and a second portion adjacent to the first portion in the second direction
The first part is formed by bending a plate-like part elongated in the second direction toward one surface of the main body,
The second part is configured by bending a plate-like part elongated in the second direction toward the other surface of the main body,
The power storage device , wherein the boundary portion between the first portion and the second portion is twisted because the first portion and the second portion are connected at the second end portion . The fixing portion extends from an end portion of the first end portion of the main body in the third direction along the first direction to the outside of the power storage element or to the side of the power storage element , and It has a plate shape along a plane including the third direction,
A third end portion of the fixing portion, which is an end portion on the second end side in the third direction, is continuous with the first portion, and is connected to the third end portion of the fixing portion in the third direction. 2 . The power storage device according to claim 1 , wherein the first portion is bent with respect to the portion adjacent to at .

Images