JP2023108793A - power storage device - Google Patents

Abstract

To provide a power storage device capable of suppressing the influence of a force on the connection between a bus bar and a power storage element when the force is applied to an electric wire.SOLUTION: A power storage device includes: a plurality of power storage elements 10 aligned in a first direction; an edge member 30 aligned with the plurality of power storage elements 10 in the first direction; a bus bar holding member 7 holding at least one bus bar conducting the power storage elements 10 together, the bus bar holding member extending in the first direction along the plurality of power storage elements 10; and an electric wire disposed along the bus bar holding member 7 and protruding from one edge of the bus bar holding member 7 in the first direction. The bus bar holding member 7 has a first fixing part 761 which is disposed at one edge in the first direction and to which the electric wire is fixed, and a second fixing part 765 fixed to the edge member 30.SELECTED DRAWING: Figure 8

Description

The present invention relates to a power storage device having a plurality of power storage elements.

2. Description of the Related Art Conventionally, a power supply device having a busbar module in which electric wires are arranged is known (see Patent Document 1). Specifically, as shown in FIGS. 16 and 17, this power supply device 500 includes a battery assembly 502 having a plurality of batteries 501, a bus bar module 503 attached to this battery assembly 502, and a predetermined battery 501. and an electric wire 509 to be connected.

Each of the plurality of batteries 501 includes a parallelepiped battery body 510 and a positive electrode 511 and a negative electrode 512 protruding in the same direction from one end face 510a of the battery body 510 .

The busbar module 503 includes a plurality of busbars and a synthetic resin plate 504 housing them. The plate 504 includes a plate body 505 formed in a flat plate shape and superimposed on the upper surface 502a of the battery assembly 502, a plurality of first accommodating portions 506 accommodating respective busbars, and an electric wire holding portion 507 holding electric wires 509. , is equipped with

Each bus bar is fitted into each first accommodating portion 506 of the plate 504, and nuts 530 are screwed to the positive electrodes 511 and negative electrodes 512 of the batteries 501 of the battery assembly 502 that are passed through the respective holes of the bus bars. are connected to each battery 501 with . Thereby, the plate 504 is fixed to the battery assembly 502 via the bus bars.

The electric wire holding portion 507 is provided on the plate 504 of the busbar module 503 and holds the electric wire 509 by sandwiching the electric wire 509 to fix the electric wire 509 to the plate 504 .

In the power supply device 500 described above, the busbar module 503 is fixed to the battery assembly 502 by connecting each of the plurality of busbars to the positive electrode 511 or the negative electrode 512 of each battery 501 . Therefore, when the electric wire 509 is connected or wired to an external device or the like, for example, if a force is applied to the electric wire 509 in a direction in which the busbar module 503 separates from the battery assembly 502 , the electric wire 509 is held by the electric wire holding portion 507 as a plate. Since it is fixed to 504 , the force tends to move plate 504 away from battery assembly 502 . At this time, a force is applied to the connecting portion between the bus bar fitted in the first accommodating portion 506 of the plate 504 and each battery 501 constituting the battery assembly 502 (stress tends to be concentrated), thereby causing the connection parts are easily damaged. That is, in the power supply device 500 , when a force is applied to the electric wire 509 , the force tends to affect the connecting portion between the bus bar and the battery 501 .

Japanese Patent Publication No. 2014-503934

Therefore, an object of the present embodiment is to provide a power storage device capable of suppressing the influence of the force on the connecting portion between the bus bar and the power storage element when force is applied to the electric wire.

The power storage device of this embodiment is
a plurality of power storage elements arranged in a first direction;
an end member aligned with the plurality of power storage elements in the first direction;
a busbar holding member that holds at least one busbar that electrically connects the power storage elements and that extends in the first direction along the plurality of power storage elements;
an electric wire arranged along the busbar holding member and protruding from one end of the busbar holding member in the first direction;
The busbar holding member is
a first fixing portion arranged at one end in the first direction and to which the electric wire is fixed;
and a second fixing portion fixed to the end member.

As described above, according to the present embodiment, it is possible to provide a power storage device capable of suppressing the influence of the force on the connecting portion between the bus bar and the power storage element when a force is applied to the electric wire.

FIG. 1 is a perspective view of a power storage device according to this embodiment. FIG. 2 is an exploded perspective view of a device main body and a plate portion included in the power storage device. FIG. 3 is a diagram of the power storage device viewed from the X-axis direction. FIG. 4 is a view of the power storage device as seen from the Z-axis direction, omitting some of the plurality of cover portions of the plate portion. FIG. 5 is an exploded perspective view of the main body of the apparatus, with a part of the configuration omitted. FIG. 6 is an exploded perspective view of an end member included in the power storage device. FIG. 7 is an exploded perspective view of the end member. FIG. 8 is a cross-sectional view of the end portion of the power storage device in the X-axis direction taken along line VIII-VIII in FIG. FIG. 9 is a view of the plate portion viewed from the Z-axis direction. FIG. 10 is a view of the plate portion viewed from the Z-axis direction, omitting some of the plurality of lid portions and the elongated member. FIG. 11 is a view of the plate portion viewed from the Y-axis direction. FIG. 12 is a view of one end in the X-axis direction of the holding member main body provided in the plate portion, viewed from the Y-axis direction. FIG. 13 is a view of the one end of the holding member main body as viewed from one side in the Z-axis direction. FIG. 14 is a view of the one end of the holding member body viewed from the other side in the Z-axis direction. FIG. 15 is a view of the holding member body viewed from one side in the X-axis direction. FIG. 16 is a perspective view of a conventional power supply device. FIG. 17 is an exploded perspective view of the power supply device.

The power storage device according to this embodiment is
a plurality of power storage elements arranged in a first direction;
an end member aligned with the plurality of power storage elements in the first direction;
a busbar holding member that holds at least one busbar that electrically connects the power storage elements and that extends in the first direction along the plurality of power storage elements;
an electric wire arranged along the busbar holding member and protruding from one end of the busbar holding member in the first direction;
The busbar holding member is
a first fixing portion arranged at one end in the first direction and to which the electric wire is fixed;
and a second fixing portion fixed to the end member.

According to such a configuration, when a force in a direction intersecting the first direction is applied to the portion of the electric wire protruding from the busbar holding member, the busbar holding member to which the electric wire is fixed is secured to the end member by the second fixing portion. The movement of the busbar holding member is restrained by being fixed to the busbar, thereby restraining the influence of the force on the connecting portion between the busbar and the storage element.

In the power storage device,
The second fixing portion is arranged at a position at least partially overlapping with or adjacent to the first fixing portion when viewed from the second direction in which the busbar holding member, the plurality of power storage elements, and the end member are arranged. may

According to this configuration, when a force is applied to the protruding portion of the electric wire in a direction intersecting the first direction, the positions of the first fixing portion and the second fixing portion are close to each other. The movement of the holding member is effectively suppressed, thereby more effectively suppressing the influence of the force on the bus bar and the connecting portion between the bus bar and the storage element.

Further, in the power storage device,
The end member is
a main body portion that extends along a plane direction perpendicular to the first direction and overlaps the storage element when viewed from the first direction;
an extending portion extending from the body portion along the first direction in a direction away from the power storage element;
The extension portion may engage the second fixed portion.

In this way, by fixing (engaging with) the second fixing portion to the extending portion extending away from the main body portion, the size of the main body portion in the first direction can be suppressed.

in this case,
The extension portion has a through hole penetrating in the second direction at a portion overlapping the busbar holding member when viewed from the second direction in which the busbar holding member, the plurality of power storage elements, and the end members are arranged. death,
The second fixing portion may extend in the second direction and pass through the through hole.

By inserting the second fixing portion through the through hole of the extension portion and engaging with the extension portion in this way, when a force is applied to the portion of the electric wire protruding from the busbar holding member, the second direction ( (In other words, movement of the busbar holding member in a direction intersecting the second direction is preferably suppressed).

Further, in the power storage device,
The end member has a metal termination member and an insulating member disposed between the termination member and the storage element in the first direction to insulate the termination member and the storage element. ,
The termination member may have the extension.

Since the terminating member to which the second fixing part is fixed is made of metal in this way, sufficient strength is ensured in the terminating member. movement of the busbar holding member when a force is applied in a direction intersecting the .

An embodiment of the present invention will be described below with reference to FIGS. 1 to 15. 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 to 5, the power storage device 1 of the present embodiment includes a plurality of power storage elements 10 arranged in a predetermined direction, end members 30 aligned with the plurality of power storage elements 10 in the predetermined direction, and power storage elements 10 at least one bus bar 6 for conducting each other; a bus bar holding member 7 holding the bus bar 6 and extending in the predetermined direction along the plurality of storage elements 10; and an electric wire 80 protruding from one end of the holding member 7 in the predetermined direction. Specifically, it is as follows.

This power storage device 1 includes a device main body A having a plurality of power storage elements 10 and a plate portion B including a busbar holding member 7 that holds a busbar 6 .

The apparatus main body A includes a plurality of storage elements 10 each having an external terminal 14, a plurality of adjacent members 2 arranged between the storage elements 10, and a holding member that tightens the plurality of storage elements 10 in the predetermined direction. a first fastening member 4 that fixes at least one adjacent member 2 to the holding portion 3;

Each of the plurality of power storage elements 10 is a primary battery, a secondary battery, a capacitor, or the like. The power storage device 10 of the present embodiment is a chargeable/dischargeable non-aqueous electrolyte secondary battery. More specifically, the power storage device 10 is a lithium ion secondary battery that utilizes electron transfer that occurs with the movement of lithium ions.

Specifically, each electric storage element 10 includes an electrode body, a case 11 that accommodates the electrode body together with an electrolytic solution, an external terminal 14 that is at least partially exposed to the outside of the case 11, and the electrode body and the external terminal 14. and a current collector to be connected.

In the electrode assembly, positive electrodes and negative electrodes are alternately laminated with separators interposed therebetween. In this electrode body, lithium ions move between the positive electrode and the negative electrode, thereby charging and discharging the storage element 10 .

The case 11 has a case body 12 having an opening and a plate-like cover plate 13 that closes (closes) the opening of the case body 12 . The case main body 12 has a square tubular shape (that is, a bottomed square tubular shape) with one end in the opening direction closed, and the case 11 has a rectangular parallelepiped shape (hexahedral shape).

Specifically, the case main body 12 includes a plate-like closing portion 121 and a cylindrical trunk portion (peripheral wall) 122 connected to the peripheral edge of the closing portion 121 .

The closing part 121 is located at the lower end of the case body 12 when the case body 12 is arranged with the opening facing upward (that is, it becomes the bottom wall of the case body 12 when the opening faces upward). ) is the site. The closing portion 121 has a rectangular shape when viewed from the normal direction of the closing portion 121 .

The trunk portion 122 has a rectangular tube shape, more specifically, a flat rectangular tube shape. The trunk portion 122 has a pair of long wall portions 123 extending from the long sides of the peripheral edge of the closing portion 121 and a pair of short wall portions 124 extending from the short sides of the peripheral edge of the closing portion 121 . In the trunk portion 122 , the short wall portion 124 connects the corresponding ends of the pair of long wall portions 123 to each other, thereby forming the square tubular trunk portion 122 .

The cover plate 13 is a plate-like member that closes the opening of the case body 12 . The lid plate 13 has a rectangular plate-like lid plate main body 131 and a gas exhaust valve 132 arranged on the lid plate main body 131 .

The gas discharge valve 132 discharges the gas to the outside when the pressure inside the case 11 exceeds a predetermined value due to the generation of gas within the case 11 . The gas exhaust valve 132 of the present embodiment is arranged in the central portion of the cover plate main body 131 in the longitudinal direction.

The case 11 is formed by joining the cover plate 13 configured in this way to the case main body 12 with the peripheral edge of the cover plate 13 overlapping the opening peripheral edge of the case main body 12 .

The external terminal 14 is a portion that is electrically connected to the external terminal 14 of another storage element 10 or an external device or the like. The external terminal 14 is formed of a conductive member. For example, the external terminal 14 is made of a highly weldable metal material such as an aluminum-based metal material such as aluminum or an aluminum alloy, or a copper-based metal material such as copper or a copper alloy.

The power storage device 10 of the present embodiment has two external terminals 14 arranged at both ends of the cover plate 13 in the longitudinal direction. That is, the two external terminals 14 are arranged on the cover plate 13 at positions sandwiching the gas exhaust valve 132 therebetween.

The storage elements 10 described above have a flat rectangular parallelepiped shape, and the plurality of storage elements 10 are arranged in the predetermined direction with the wide surfaces (long wall portions 123) of the case 11 facing each other. At this time, the gas discharge valves 132 of the storage elements 10 are arranged in a line in the predetermined direction. One external terminal 14 and the other external terminal 14 of each storage element 10 are arranged in the predetermined direction at each position with the gas discharge valve 132 interposed therebetween.

In the following description, the direction in which the plurality of storage elements 10 are arranged (first direction) is the X-axis of the orthogonal coordinate system, the direction in which the short wall portion 124 of the case 11 faces is the Y-axis of the orthogonal coordinate system, and the cover plate 13 is closed. Let the direction (second direction) in which the portions 121 face each other be the Z-axis of the orthogonal coordinate system.

Each of the plurality of adjacent members 2 has insulating properties and is arranged between the storage elements 10 arranged in the X-axis direction. The adjacent member 2 of this embodiment is made of resin. The adjacent member 2 forms a channel R through which a fluid for temperature adjustment (a gas such as air in the example of the present embodiment) can flow between adjacent storage elements 10 . In the power storage device 1 of the present embodiment, the multiple adjacent members 2 include multiple types of adjacent members 2A and 2B.

Specifically, the plurality of adjacent members 2 includes a first adjacent member 2A arranged between two adjacent energy storage elements 10 and a second adjacent member 2A arranged between adjacent energy storage elements 10 and fixed to the holding portion 3. and an adjacent member 2B. That is, the power storage device 1 includes, as the adjacent members 2, a first adjacent member 2A and a second adjacent member 2B. The power storage device 1 of this embodiment includes a plurality of first adjacent members 2A and one second adjacent member 2B. Each of the plurality of first adjacent members 2A is arranged between the storage elements 10 except between the storage elements 10 where the second adjacent members 2B are arranged.

Each of the plurality of first adjacent members 2A includes a first body portion 21A extending in a direction perpendicular to the X-axis direction between the energy storage elements 10 adjacent in the X-axis direction, and the energy storage elements 10 adjacent to the first body portion 21A. and at least one first restricting portion 25A that restricts movement with respect to the first main body portion 21A. Further, each of the plurality of first adjacent members 2A forms at least one flow path R through which the temperature-adjusting fluid can flow between adjacent storage elements 10. As shown in FIG.

The first main body portion 21A is a portion that faces the long wall portion 123 of the case 11 of the storage element 10 while being partially in contact with the long wall portion 123 . The first body portion 21A forms a channel R in cooperation with the adjacent storage element 10, through which the fluid for temperature adjustment can flow. The first main body portion 21A of the present embodiment has a rectangular plate shape having a size corresponding to that of the power storage element 10 when viewed from the X-axis direction, and has an XZ plane (a plane including the X-axis direction and the Z-axis direction). The cross-sectional shape along the line is a rectangular waveform.

The first restricting portion 25A extends in the X-axis direction from at least the corners of the rectangular first body portion 21A, and extends between the storage element 10 (specifically, the case 11) adjacent to the first body portion 21A and the YZ plane (Y By contacting from the outside in the plane (including the axial direction and the Z-axis direction), the storage element 10 is restricted from moving relative to the first body portion 21A in the YZ plane direction. The first restricting portion 25A of this embodiment extends from the first body portion 21A toward one side and the other side in the X-axis direction.

The second adjacent member 2B includes a second body portion 21B extending in a direction perpendicular to the X-axis direction (in the YZ plane direction) between two adjacent power storage elements 10, and a holding portion for the second adjacent member 2B. 3, and at least one second restricting portion 25B that restricts movement of the storage element 10 adjacent to the second body portion 21B with respect to the second body portion 21B. In addition, the second adjacent member 2B also forms at least one channel R between the adjacent storage elements 10, through which the temperature adjusting fluid can flow.

The second main body portion 21B is a portion that faces the long wall portion 123 of the case 11 of the storage element 10 while being partially in contact with the long wall portion 123 . The second main body portion 21B forms a channel R in cooperation with the adjacent storage element 10 so that the fluid for temperature adjustment can flow between the storage element 10 and the storage element 10. The dimension in the X-axis direction of the second body portion 21B is larger than the dimension in the X-axis direction of the first body portion 21A (that is, it is thicker). The second main body portion 21B of the present embodiment has a rectangular plate shape with a size corresponding to that of the storage element 10 when viewed from the X-axis direction. The second body portion 21B has a plurality of ridges 211B each extending in the Y-axis direction and arranged at intervals in the Z-axis direction. The plurality of ridges 211B protrude from a surface 212B of the second body portion 21B facing the storage element 10 .

The second fastening member 22B is arranged at each end in the Y-axis direction of the second body portion 21B. Each of the plurality of second fastening members 22B fastens the second adjacent member 2B and the holding portion 3 by engaging with the first fastening member 4 . Each second fastening member 22B of this embodiment is an insert nut. Each first fastening member 4 of the present embodiment is a bolt, and by engaging (screwed) with the second fastening member 22B in a state where the holding portion 3 is inserted, the second adjacent member 2B and the holding portion 3.

The second restricting portion 25B extends in the X-axis direction from at least the corners of the rectangular second body portion 21B, and extends in the YZ plane direction from the storage element 10 (specifically, the case 11) adjacent to the second body portion 21B. The contact from the outside restricts the relative movement of the storage element 10 with respect to the second body portion 21B in the YZ plane direction. The second restricting portion 25B of the present embodiment extends from the second body portion 21B toward one side and the other side in the X-axis direction.

The holding part 3 includes an end member 30 adjacent to a laminate D (see FIG. 5) composed of the storage elements 10 and the adjacent members 2 alternately arranged in the X-axis direction, and an end member 30 connected to the end member 30 and laminated. a connecting member 37 extending along the body D in the X-axis direction. The holding portion 3 of the present embodiment connects a pair of end members 30 arranged on both sides of the laminate D in the X-axis direction and corresponding ends of the pair of end members 30 in the Y-axis direction. and a pair of connection members 37 . The holding portion 3 also has a plurality of connecting members 38 that connect the end member 30 and the connecting member 37 .

As shown in FIGS. 6 to 8, each of the pair of end members 30 includes a body portion E that spreads along a plane direction orthogonal to the X-axis direction and overlaps the storage element 10 when viewed from the X-axis direction; and an extending portion F extending from the main body portion E along the X-axis direction in a direction away from the storage element 10 . The end member 30 of the present embodiment is composed of two plate-like members (the terminal member 31 and the insulating member 35) arranged in the X-axis direction, and the main body E is one of the two members 31 and 35. The extended portion F is configured by a portion 322 of the one member 31 .

Specifically, each end member 30 includes a metal end member 31, the end member 31 in the X-axis direction, and the storage element 10 (more specifically, the storage element arranged at the end of the laminate D in the X-axis direction). 10) and an insulating member 35 that insulates between the terminal member 31 and the storage element 10 .

The terminating member 31 is in the shape of a rectangular plate having a size corresponding to that of the storage element 10, and has connecting through-holes 31a extending in the X-axis direction at its four corners. That is, the terminal member 31 has four connecting through holes 31a. These four connection through-holes 31 a are used for connecting the terminal member 31 and the connection member 37 .

Specifically, the terminating member 31 has a first member 32 and a second member 33 arranged in a direction approaching the storage element 10 in the X-axis direction, and has a rectangular shape elongated in the Y-axis direction when viewed from the X-axis direction. is. In addition, the termination member 31 of this embodiment has a plurality of fixing portions 34 extending from the first member 32 along the X-axis direction.

The first member 32 includes a plate-like first member main body 321 extending along a direction (YZ plane direction) perpendicular to the X-axis direction, and a direction away from the power storage element 10 in the X-axis direction from the first member main body 321. and a collar portion 322 extending to the .

The first member main body 321 has a rectangular shape corresponding to the electric storage element 10 when viewed from the X-axis direction, more specifically, a rectangular shape elongated in the Y-axis direction. The first member main body 321 has first connecting through holes 3211 extending in the X-axis direction at four corners (that is, corners of the rectangular shape). That is, the first member main body 321 has four first connection through-holes 3211 . In addition, the first member main body 321 has two through-holes for fixing portion penetrating in the X-axis direction on the center C side (inner side) of the first connection through-holes 3211 at both ends of the first member main body 321 in the Y-axis direction. It has holes 3212 . These two fixing portion through-holes 3212 are arranged with an interval in the diagonal direction of the first member main body 321 .

The collar portion 322 is a plate-like portion that extends in the X-axis direction away from the storage element 10 from one end (upper in FIG. 7) of the first member main body 321 in the Z-axis direction and extends in the Y-axis direction. be. The flange portion 322 constitutes the extension portion F of the end member 30 in the power storage device 1 of the present embodiment.

The collar portion 322 has a first through hole 3221, a second through hole 3222, and a third through hole in order from one end in the Y-axis direction (the left end in the example shown in FIG. 6) toward the other end. 3223 are arranged. Further, the flange portion 322 of this embodiment has a fourth through hole 3224 at a position closer to the other end in the Y-axis direction than the third through hole 3223 . The fourth through-hole 3224 is arranged in the central portion of the flange portion 322 in the Y-axis direction. Each through hole 3221, 3222, 3223, 3224 penetrates the flange 322 in the Z-axis direction. Although not shown in the present embodiment, terminal blocks having terminals electrically connected to external devices such as vehicles are fixed to the first through-hole 3221, the second through-hole 3222, and the third through-hole 3223. . This terminal is electrically connected to the bus bar 6 connected to the external terminal 14 of the storage element 10 located at the end in the X-axis direction.

In addition, the flange portion 322 has a first notch 3225 formed between the first through-hole 3221 and the second through-hole 3222 in the Y-axis direction so as to be recessed in the X-axis direction toward the power storage element 10 . and a second notch 3226 cut from the fourth through hole 3224 to the other end in the Y-axis direction. In this first notch 3225, the depth in the concave direction (dimension in the X-axis direction) decreases as the distance from the first through hole 3221 to the second through hole 3222 increases.

The first through-hole 3221 is a circular (so-called racetrack-shaped) hole elongated in the Y-axis direction, the second through-hole 3222 is a circular hole, and the third through-hole 3223 is a square hole. be. The fourth through hole 3224 is a square hole with four arc-shaped corners, and is larger than the third through hole 3223 .

The second member 33 has a rectangular shape corresponding to the first member main body 321 of the first member 32 when viewed from the X-axis direction, more specifically, has a rectangular contour elongated in the Y-axis direction. is superimposed on The second member 33 has second connection through-holes 331 (see FIG. 6) that penetrate in the X-axis direction at four corners (that is, corners of the rectangular shape). That is, the second member 33 has four second connection through-holes 331 .

Each of these four second connection through-holes 331 overlaps each of the first connection through-holes 3211 arranged at the four corners of the first member main body 321 when viewed from the X-axis direction. Thereby, the first connecting through-hole 3211 of the first member body 321 and the second connecting through-hole 331 of the second member 33 are connected in the X-axis direction to form the connecting through-hole 31 a of the terminal member 31 .

In addition, the second member 33 has a plurality of (two in the example of the present embodiment) protrusions 332 that protrude in the X-axis direction toward the power storage element 10 . Each of the plurality of protrusions 332 extends in the Y-axis direction and is spaced apart in the Z-axis direction. The top of each protrusion 332 (tip in the direction of protrusion) is in contact with the insulating member 35 (see FIG. 8). The convex portion 332 of this embodiment is formed by drawing.

The plurality of fixing portions 34 are axial portions extending from the first member main body 321 through the fixing portion through-holes 3212 of the first member main body 321 in a direction away from the power storage element 10 in the X-axis direction (in other words, protruding). and a head portion 342 extending from the shaft portion 341 in a direction orthogonal to the X-axis direction between the first member 32 and the second member 33 in the X-axis direction. This head portion 342 is larger than the through hole 3212 for fixing portion. The shaft portion 341 has a male thread on its peripheral surface. The fixing portion 34 is used to fix the power storage device 1 when the power storage device 1 is mounted on a vehicle, an apparatus, or the like.

The insulating member 35 is a member that insulates between the terminating member 31 and the laminate D, and the insulating member 35 of this embodiment is made of resin. Specifically, the insulating member 35 includes an insulating member main body 351 extending in a direction orthogonal to the X-axis direction between the terminal member 31 and the storage element 10 arranged at the end of the laminate D in the X-axis direction, The insulating member main body 351 and at least one insulating member restricting portion 352 that restricts the movement of the adjacent storage element 10 with respect to the insulating member main body 351 . The insulating member 35 includes a peripheral wall portion 353 extending from the peripheral portion of the insulating member main body 351 in a direction approaching the terminal member 31 in the X-axis direction, and a peripheral wall portion 353 extending from the insulating member main body 351 in a direction approaching the terminal member 31 in the X-axis direction. It has a first wall portion 354 and a second wall portion 355 extending in the Y-axis direction.

The insulating member 35 faces the long wall portion 123 of the adjacent storage element 10 with a part thereof in contact with each other, thereby forming at least one flow path through which the temperature adjusting fluid can flow between the storage element 10 and the insulating member 35 . form R. The insulating member 35 of this embodiment forms a plurality of flow paths R between adjacent storage elements 10 .

The insulating member main body 351 is a rectangular plate-like portion having a size corresponding to that of the adjacent storage element 10 when viewed in the X-axis direction. Specifically, the insulating member main body 351 has a plate shape extending in a direction orthogonal to the X-axis direction. The insulating member main body 351 has a facing surface 3511A that faces the adjacent storage element 10 (specifically, the long wall portion 123 of the case 11), and a facing surface that is the back surface of the facing surface 3511A and faces the terminating member 31. 3511B, and a plurality of protrusions 3512 protruding from the facing surface 3511A facing the power storage element 10 . Further, the insulating member main body 351 has a plurality of recesses 3513 arranged on the facing surface 3511B facing the terminal member 31 .

Each of the plurality of protrusions 3512 extends in the Y-axis direction on the facing surface 3511A and is spaced apart in the Z-axis direction. Each of the plurality of protrusions 3512 has a tip surface 3512 a in the projecting direction (X-axis direction) in contact with the storage element 10 adjacent to the insulating member main body 351 . As a result, the facing surface 3511A of the insulating member main body 351, the two convex portions 3512 adjacent to each other in the Z-axis direction on the facing surface 3511A, and the storage element 10 (the long wall of the case 11) facing the facing surface 3511A. Portion 123 ) forms a flow path R on the storage element 10 side of the insulating member main body 351 .

Each of the plurality of recesses 3513 is recessed in the X-axis direction on the facing surface 3511B and arranged at a position corresponding to each connecting through-hole 31a of the termination member 31 . The concave portion 3513 of this embodiment is a circular concave portion when viewed from the X-axis direction, and the bottom surface 3513a widens in a direction perpendicular to the X-axis direction.

The insulating member restricting portion 352 extends in the X-axis direction from at least the corners of the rectangular insulating member main body 351, and contacts the storage element 10 (specifically, the case 11) adjacent to the insulating member 35 from the outside in the YZ plane direction. The contact restricts the relative movement of the storage element 10 with respect to the insulating member 35 in the YZ plane direction. The insulating member restricting portion 352 of the present embodiment extends from the insulating member main body 351 toward one side in the X-axis direction (the power storage element 10 side).

The peripheral wall portion 353 extends from each side of the rectangular insulating member main body 351 toward the end member 31 in the X-axis direction.

The first wall portion 354 extends in the X-axis direction and in the Y-axis direction from the facing surface 3511B of the insulating member main body 351 . The first wall portion 354 is arranged at one end of the insulating member main body 351 in the Z-axis direction, and a predetermined gap is provided between each end of the first wall portion 354 in the Y-axis direction and the peripheral wall portion 353 . formed.

The second wall portion 355 extends in the X-axis direction and in the Y-axis direction from the facing surface 3511B of the insulating member main body 351 . The second wall portion 355 is arranged at the other end of the insulating member main body 351 in the Z-axis direction, and a predetermined gap is provided between each end of the second wall portion 355 in the Y-axis direction and the peripheral wall portion 353 . is formed.

Each of the pair of connection members 37 includes a connection member main body 370 facing the short wall portion 124 of each storage element 10, and one end (upper in FIG. 5) of the connection member main body 370 in the Z-axis direction. 10, a first piece portion 371 extending in the Y-axis direction and extending in the X-axis direction along the cover plate 13 of 10, and the other (lower in FIG. 5) end of the connection member main body 370 in the Z-axis direction. A second piece portion 372 extending in the Y-axis direction and extending in the X-axis direction along the closing portion 121 of the connecting member main body 370 from each end in the X-axis direction to the end member 30 (more specifically, the terminal member 31) and a pair of third pieces 373 extending in the Y-axis direction and extending in the Z-axis direction.

The connection member main body 370 has a plate shape extending along the short wall portion 124 of each storage element 10, and has a plurality of through holes penetrating in the Y-axis direction so that the temperature-adjusting fluid can flow into or out of each channel R. 3701.

The first piece 371 has a belt shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both end portions in the X-axis direction. The second piece 372 has a belt-like shape elongated in the X-axis direction, and has a constant dimension (width) in the Y-axis direction at each position except for both ends in the X-axis direction. The width of the second piece 372 in the Y-axis direction is larger than the width of the first piece 371 . Each of the pair of third piece portions 373 has two through holes 3731 spaced apart in the Z-axis direction. Each through-hole 3731 is a connecting through-hole 31a of the terminal member 31 (a through-hole in which the first connecting through-hole 3211 of the first member main body 321 and the second connecting through-hole 331 of the second member 33 are connected). placed in corresponding positions.

Each of the plurality of connecting members 38 connects the terminating member 31 and the connecting member 37 while being inserted through the connecting through hole 31a of the terminating member 31 and the through hole 3731 of the connecting member 37 (more specifically, the third piece portion 373). conclude. Each connecting member 38 of this embodiment is composed of a bolt 381 and a nut 382 . The bolt 381 is arranged between the terminal member 31 and the insulating member 35 in a state in which the through hole 3731 of the third piece portion 373 of the connecting member 37 and the coupling through hole 31a of the terminal member 31 are sequentially inserted. The third piece 373 and the terminating member 31 are fastened by screwing (engaging) the nut 382 that is attached to the third piece 373 .

The insulator 5 has insulating properties. This insulator 5 is arranged between the connecting member 37 and the plurality of power storage elements 10 . Specifically, the power storage device 1 includes a pair of insulators 5, and each insulator 5 covers a region of the connection member 37 facing at least the plurality of power storage elements 10 (or the laminate D). Thereby, each insulator 5 insulates between the connection member 37 and the plurality of power storage elements 10 . Each insulator 5 has a through hole 51 having a size and shape corresponding to each through hole 3701 of the connecting member main body 370 at each position corresponding to each through hole 3701 of the connecting member main body 370 .

As shown in FIGS. 1, 2, 4, and 9 to 11, the plate portion B holds at least one bus bar 6 connecting the external terminals 14 of different storage elements 10 and at least one bus bar 6. and a harness 8 arranged on the busbar holding member 7 . The plate portion B of this embodiment also includes a thermistor S that detects the temperature of the storage element 10 .

At least one bus bar 6 is a conductive plate-shaped member such as a metal, and connects the external terminals 14 of different storage elements 10 to each other. The power storage device 1 of this embodiment includes a plurality of busbars 6, and each busbar 6 connects the external terminals 14 of the power storage elements 10 adjacent to each other in the X-axis direction. Specifically, the bus bar 6 has a rectangular contour when viewed from the Z-axis direction, and is welded to each of the external terminals 14 adjacent to each other in the X-axis direction. The plurality of busbars 6 connect (make conductive) the plurality of power storage elements 10 included in the power storage device 1 in series.

The thermistor S outputs a signal corresponding to the surface temperature of the storage element 10 by being in contact with the surface (case 11 ) of the storage element 10 . The power storage device 1 of the present embodiment includes a plurality of thermistors S (the number of which is equal to or less than the number of power storage elements 10 included in the power storage device 1 ), and detects the temperature of a predetermined power storage element 10 among the plurality of power storage elements 10 .

The harness 8 has a cable portion 81 having a plurality of electric wires 80 and a connector 82 arranged at an end portion of the cable portion 81 .

The cable portion 81 is formed by bundling at least a portion of a plurality of electric wires 80 having one end connected to the busbar 6 or the thermistor S. As shown in FIG. The cable portion 81 is arranged on the busbar holding member 7 with one end projecting from the busbar holding member 7 in the X-axis direction. A connector 82 is attached to the tip of the cable portion 81 in the projecting direction. The connector 82 of this embodiment is a multicore connector.

The busbar holding member 7 includes a plate-like holding member main body 70 covering the surface of the laminate D on which the external terminals 14 are arranged, and an end portion of the holding member main body 70 in the X-axis direction and engaged with the end member 30 . and a fixing portion 76 for fixing the busbar holding member 7 to the apparatus main body A. The busbar holding member 7 of this embodiment has an elongated member 77 detachably attached to the holding member main body 70 . The holding member main body 70 and the fixing portion 76 are made of resin and formed by integral molding. The busbar holding member 7 has a fixing portion 76 at one end of the holding member main body 70 in the X-axis direction, and a part of the fixing portion 76 (described later) at the other end of the holding member main body 70 in the X-axis direction. It has the same configuration as the second fixing portion) 765 (see FIG. 11).

The holding member main body 70 is a plate-shaped member whose size in the Z-axis direction is smaller than the size in the X-axis direction and the size in the Y-axis direction. Shape. The holding member main body 70 has a plurality of busbar holding portions 71 each holding the busbar 6 , a harness arrangement portion 72 in which the harness 8 is arranged, and a plurality of lid portions 73 . Further, the holding member body 70 has a plurality of thermistor holding portions 74 each holding the thermistor S. As shown in FIG. In the holding member main body 70 of the present embodiment, when viewed from one side in the Z-axis direction to the other side (that is, when viewed from the plate portion B toward the apparatus main body A), a portion of the laminated body D is exposed. It has an opening 75 . Note that FIG. 10 shows only one lid portion 73 of the plurality of lid portions 73 .

Each of the plurality of busbar holding portions 71 is a portion that holds the busbar 6 so as to surround the peripheral portion of the busbar 6 . The busbar holding portion 71 of the present embodiment surrounds the peripheral portion of the busbar 6 to which the external terminals 14 of the adjacent power storage elements 10 are welded by a peripheral wall portion 711 having a rectangular tubular shape when viewed from the Z-axis direction. This holds the bus bar 6 (see the enlarged view of FIG. 10).

The plurality of busbar holding portions 71 are arranged in the X-axis direction at one end and the other end of the holding member main body 70 in the Y-axis direction. In other words, in the holding member main body 70, rows of the busbar holding portions 71 (hereinafter also referred to as “holding portion rows 71A”) aligned in the X-axis direction are arranged in two rows with an interval in the Y-axis direction (Fig. 10). The holding portion row 71A extends from one end of the holding member main body 70 to the other end in the X-axis direction.

The harness placement portion 72 is a groove-shaped portion, and the cable portion 81 of the harness 8 is placed inside. The harness arrangement portion 72 includes two first portions 721 adjacent to the inner side (central side) of each holding portion row 71A in the Y-axis direction and extending in the X-axis direction along the holding portion row 71A; and a second portion 722 extending in the X-axis direction and connecting one ends of the first portions 721 in the X-axis direction. In each of the two first portions 721, each side wall in the Y-axis direction extends continuously or intermittently in the X-axis direction, and the bottom wall extends continuously or intermittently in the X-axis direction.

In the harness arrangement portion 72 configured as described above, the cable portion 81 is arranged in each of the first portion 721 and the second portion 722 , and the end portion of the harness 8 on the connector 82 side is the second portion 722 . A harness 8 is arranged so as to protrude in the X-axis direction from the central portion in the Y-axis direction. The cable portions 81 corresponding to the two rows of holding portion rows 71A described above are collectively pulled out from one end portion of the holding member main body 70 in the X-axis direction (the side on which the fixing portion 76 is arranged).

Each of the plurality of lid portions 73 can release one end in the Z-axis direction of the peripheral wall portion 711 of the busbar holding portion 71 and one end of the first portion 721 of the harness arrangement portion 72 in the Z-axis direction. It is a plate-like part that covers. Each lid portion 73 has a rectangular plate shape, and a portion of the peripheral edge is connected to a corresponding portion of the end portion of the peripheral wall portion 711, and the connection portion 731 has flexibility. The lid portion 73 of this embodiment has a rectangular plate shape having a size to cover two busbar holding portions 71 adjacent to each other in the X-axis direction and a first portion 721 corresponding to the two busbar holding portions 71, or one busbar. It has a rectangular plate shape with a size to cover the holding portion 71 and the first portion 721 corresponding to the busbar holding portion 71 .

Each of the plurality of thermistor holding portions 74 is arranged spaced apart in the X-axis direction at a position adjacent to the first portion 721 on the inner side in the Y-axis direction. The thermistor holding portion 74 holds the thermistor S while being pressed against the cover plate 13 of the storage element 10 .

The opening 75 extends from one end in the X-axis direction to the other end in the Y-axis direction of the holding member main body 70, and a long member 77 is detachably attached thereto. In a state where the long member 77 is removed, when the power storage device 1 is viewed from the Z-axis direction, the gas discharge valve 132 of each power storage element 10 constituting the laminate D through the opening 75 of the holding member main body 70 can be seen. Exposed.

12 to 15, the fixing portion 76 has a first fixing portion 761 to which the harness 8 is fixed and a second fixing portion 765 to which the end member 30 is fixed. It is arranged at one end of the main body 70 in the X-axis direction.

The first fixing portion 761 includes an extending portion 762 extending along the X-axis direction from one end of the holding member main body 70 in the X-axis direction (more specifically, the central position of the second portion 722 in the Y-axis direction), and a band portion 763 for bundling the portion 762 and the harness 8 . 13 and 14, the band portion 763 is not shown for convenience of explanation.

The extending portion 762 includes a plate-like extending portion main body 7621 extending in the X-axis direction and extending in the Y-axis direction, a pair of reinforcing portions 7625 extending in the other Z-axis direction from the extending portion main body 7621 and extending in the Y-axis direction, have

The extending portion main body 7621 has a support surface 7621a that faces one side in the Z-axis direction and supports the harness 8, and a pair of concave portions 7622 that are recessed toward the center in the Y-axis direction at both ends in the Y-axis direction. The support surface 7621a extends in a direction orthogonal to the Z-axis direction and is flush with the bottom surface of the second portion 722, specifically, the surface of the bottom wall of the second portion 722 facing one side in the Z-axis direction. ing. Also, the pair of recesses 7622 are arranged at both ends in the Y-axis direction at the distal end of the extension main body 7621 .

In addition, the extension portion main body 7621 of this embodiment has two through holes 7621b spaced apart in the Y-axis direction at positions closer to the base than the pair of recesses 7622 . Each through-hole 7621b penetrates the extension portion main body 7621 in the Z-axis direction.

The pair of reinforcing portions 7625 are arranged at positions closer to the base side than the pair of concave portions 7622 in the extension portion main body 7621 with a gap in the X-axis direction. Each reinforcing portion 7625 of this embodiment extends from one end of the extension portion main body 7621 to the other end in the Y-axis direction.

The band portion 763 fixes the harness 8 to the extending portion 762 by enclosing the overlapping extending portion 762 (more specifically, the extending portion main body 7621 ) and the harness 8 . The band portion 763 surrounds the extension portion main body 7621 and the harness 8 in a state of being fitted into each concave portion 7622 of the extension portion main body 7621 . This can prevent the band portion 763 from moving relative to the extending portion main body 7621 in the X-axis direction. The band part 763 of this embodiment is a binding band.

The second fixing portion 765 is arranged at a position at least partially overlapping or adjacent to the first fixing portion 761 when viewed in the Z-axis direction, and is engaged with the flange portion 322 (extending portion F) of the terminal member 31 . are in agreement. The second fixing portion 765 of this embodiment is arranged at a position overlapping the first fixing portion 761 when viewed from the Z-axis direction. Specifically, the second fixing portion 765 is arranged at both end portions in the Y-axis direction of the insertion portion 7651 extending in the Z-axis direction from the pair of reinforcing portions 7625 and in the middle position in the Z-axis direction of the insertion portion 7651. and a pair of locking portions 7652 that are connected to each other.

The insertion portion 7651 is a portion that is inserted into the fourth through hole 3224 of the collar portion 322 of the terminal member 31, and the shape of the insertion portion 7651 as viewed from the Z-axis direction corresponds to the shape of the fourth through hole 3224. It is rectangular. A gap 7651a extending in the Z-axis direction is formed in one wall of the insertion portion 7651 of the present embodiment in the X-axis direction (the distal end side of the extending portion 762).

Each of the pair of locking portions 7652 protrudes from each wall of the insertion portion 7651 facing in the Y-axis direction, and sandwiches the through-hole peripheral portion of the fourth through-hole 3224 of the collar portion 322 between itself and the pair of reinforcing portions 7625. . Each locking portion 7652 has an inclined surface 7652a positioned outward in the Y-axis direction as it progresses from the other side in the Z-axis direction to the one side. The pair of locking portions 7652 are each engaged by inserting the insertion portion 7651 into the fourth through hole 3224 with the inclined surface 7652 a in contact with the through hole peripheral portion of the fourth through hole 3224 of the collar portion 322 . The connecting portion between the stop portion 7652 and the insertion portion 7651 is elastically deformed and moves toward the inside of the insertion portion 7651, and the collar portion 322 (specifically, the through-hole peripheral edge of the fourth through-hole 3224) in the Z-axis direction (insertion direction). part) and return to the original position (protruding position).

The elongated member 77 is a member extending in the X-axis direction, and is a member that closes the opening 75 by being removably attached to the opening 75 of the holding member main body 70 . The elongated member of the present embodiment is made of an insulating material such as resin.

In the power storage device 1 configured as described above, when a force in a direction crossing the X-axis direction is applied to a portion of the harness 8 protruding from the busbar holding member 7, the busbar holding member to which the harness 8 is fixed is applied. 7 is fixed to the end member 30 (the terminal member 31 in the example of the present embodiment) by the second fixing portion 765, the movement of the busbar holding member 7 is suppressed, and as a result, the busbar 6 and the storage element 10 is suppressed.

In the power storage device 1 of the present embodiment, the second fixing portion 765 is fixed when viewed from the Z-axis direction (that is, the direction in which the busbar holding member 7, the laminate D (the plurality of power storage elements 10), and the end member 30 are arranged). It is arranged at a position overlapping the first fixing portion 761 . According to such a configuration, when a force is applied to the protruding portion of the harness 8 in a direction crossing the X-axis direction, the position of the first fixing portion 761 and the second fixing portion 765 are close to each other. The resulting movement of the busbar holding member 7 is effectively suppressed. As a result, the influence of the force on the bus bar 6 and the connecting portion (welded portion in the example of the present embodiment) between the bus bar 6 and the storage element 10 can be suppressed more effectively.

In addition, in the power storage device 1 of the present embodiment, the end member 30 extends along the plane direction orthogonal to the X-axis direction and overlaps the power storage element 10 when viewed from the X-axis direction. and an extension portion F (in the example of the present embodiment, the collar portion 322) extending away from the power storage element 10 along the X-axis direction, and the extension portion F is engaged with the second fixing portion 765. are in agreement. In this way, by adopting a configuration in which the second fixing portion 765 is fixed (engaged) with the extended portion F extending away from the main body E, the dimension of the main body E in the X-axis direction can be suppressed. can.

Since the end member 30 (specifically, the main body E) can be made thinner in this way, the size of the power storage device 1 in the X-axis direction can be reduced (that is, made compact). When the dimension of the power storage device 1 in the X-axis direction is not reduced, the dimension of each flow path R formed between the power storage element 10 and the adjacent member 2 is increased in the X-axis direction. The circulation resistance of the fluid for temperature adjustment flowing through R can be lowered. As a result, the flow rate of the temperature adjusting fluid in each flow path R can be increased, so that the cooling efficiency and the like of the power storage element 10 can be improved.

In addition, in the power storage device 1 of the present embodiment, the extension portion F extends through a portion overlapping the busbar holding member 7 (specifically, the second fixing portion 765) when viewed in the Z-axis direction. A through hole 3224 is provided, and the second fixing portion 765 extends in the Z-axis direction and is inserted through the fourth through hole 3224 . In this manner, the second fixing portion 765 is inserted through the fourth through hole 3224 of the extension portion F and engages with the extension portion F, thereby exerting a force on the portion of the harness 8 protruding from the busbar holding member 7 . When the force is applied, it becomes difficult for the busbar holding member 7 to move in the direction crossing the Z-axis direction (the insertion direction of the second fixing portion 765). That is, movement of the busbar holding member 7 in the direction intersecting the Z-axis direction is preferably suppressed.

In addition, in the power storage device 1 of the present embodiment, the end member 30 includes the metal terminal member 31 and the terminal member 31 and the power storage element 10 in the X-axis direction (more specifically, the power storage element 10 at the end of the laminate D). ) to insulate the terminating member 31 from the electric storage element 10, and the terminating member 31 has an extension portion F (flange portion 322). Since the terminal member 31 to which the second fixing portion 765 is fixed is made of metal in this manner, the terminal member 31 is secured with sufficient strength. As a result, movement of the busbar holding member 7 when force is applied in a direction intersecting the X-axis direction to a portion of the harness 8 protruding from the busbar holding member 7 is more effectively suppressed.

Further, in the power storage device 1 of the present embodiment, the harness 8 is fixed to the end member 30 (the terminating member 31 in the example of the present embodiment) via the end (fixing portion) 76 of the busbar holding member 7. Even if the harness 8 is inadvertently pulled, the resin busbar holding member 7 is elastically deformed to serve as a cushion, thereby preventing the harness 8 from breaking.

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.

A specific configuration of the first fixing portion 761 and a specific configuration of the second fixing portion 765 in the busbar holding member 7 are not limited. For example, the first fixing portion 761 of the above-described embodiment is configured by the extending portion 762 and the band portion 763, and the band portion 763 surrounds the extending portion 762 and the harness 8, thereby securing the harness 8 from the busbar holding member 7. is fixed to the busbar holding member 7, and the extension portion 762 itself fixes the harness 8 to the extension portion 762 (for example, holding, locking, fitting, fastening, bonding, sandwiching, etc.). may be

In addition, in the busbar holding member 7 of the above embodiment, the second fixing portion 765 is inserted into the fourth through hole 3224 of the flange portion 322 to engage with the peripheral portion of the through hole of the fourth through hole 3224. As a result, the busbar holding member 7 is fixed to the terminal member 31 , but the busbar holding member 7 may be fixed to the terminal member 31 by, for example, fastening with a fastening member or by clamping the flange portion 322 .

In addition, in the fixing portion 76 of the busbar holding member 7 of the above embodiment, the second fixing portion 765 is arranged at a position overlapping the first fixing portion 761 when viewed in the Z-axis direction, but the configuration is not limited to this. That is, the relative positions of the first fixing portion 761 and the second fixing portion 765 in the busbar holding member 7 are not limited.

By arranging the second fixing portion 765 at a position where at least a part of the second fixing portion 765 overlaps or is adjacent to the first fixing portion 761 when viewed from the Z-axis direction, the projecting portion of the harness 8 intersects the X-axis direction. Since the positions of the first fixing portion 761 and the second fixing portion 765 are close to each other, the movement of the busbar holding member 7 caused by the force is effectively suppressed when a force is applied in the direction of the busbar. 6 and the connecting portion between the bus bar 6 and the storage element 10 are more effectively suppressed. Here, “the position where the second fixing portion 765 is adjacent to the first fixing portion 761 when viewed from the Z-axis direction” means the contour (peripheral edge) of the second fixing portion 765 when viewed from the Z-axis direction and the first This is the position where the outline (periphery) of the fixed portion 761 contacts.

Moreover, in the power storage device 1 of the above-described embodiment, the busbar holding member 7 is fixed to the end member 31 included in the end member 30, but the configuration is not limited to this. The busbar holding member 7 may be fixed to the insulating member 35 included in the end member 30 . In this case, the insulating member 35 is not limited to being made of resin, and may be made of a metal member whose surface is covered with an insulating material in order to ensure strength and rigidity.

In addition, in the power storage device 1 of the above-described embodiment, the end member 30 is composed of two plate-like members, the termination member 31 and the insulating member 35, but the configuration is not limited to this. The end member 30 may be a single plate-like member. In addition, although the terminal member 31 is composed of two plate-like members, the first member 32 and the second member 33, the configuration is not limited to this. The termination member 31 may be configured by one plate-like member.

In addition, in the end member 30 of the power storage device 1 of the above embodiment, the extended portion F is configured by a part of the terminal member 31 (the flange portion 322 in the example of the above embodiment), but it is not limited to this configuration. . The extended portion F of the end member 30 may be configured by part of the insulating member 35 .

In addition, the end member 30 has a body portion E that spreads along a surface direction perpendicular to the X-axis direction, and an extension portion F that extends from the body portion E along the X-axis direction. Not limited to configuration. The end member 30 may be configured without the extended portion F. In this case, the busbar holding member 7 may be fixed to the body portion E of the end member 30 .

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 adjacent member 2A first adjacent member 21A first body portion 25A first restriction portion 2B second adjacent member 21B second body portion 211B convex 212B... Opposing surface 22B... Second fastening member 25B... Second restricting part 3... Holding part 30... End member 31... End member 31a... Connection through hole 32... First member, 321... First member main body 3211... First connection through hole 3212... Fixing part through hole 322... Flange part 3221... First through hole 3222... Second through hole 3223... Third through hole, 3224... Fourth through hole (through hole), 33... Second member, 331... Second coupling through hole, 332... Convex part, 34... Fixed part, 341... Shaft part, 342... Head part, 35... Insulating member , 351... Insulating member main body 3511A, 3511B... Opposite surface 3512... Convex part 3512a... Tip surface 3513... Concave part 3513a... Bottom surface 352... Insulating member restricting part 353... Peripheral wall part 354... First wall part , 355... Second wall portion, 37... Connection member, 370... Connection member body, 3701... Through hole, 371... First piece part, 372... Second piece part, 373... Third piece part, 3731... Through hole, 38... Connecting member 381... Bolt 382... Nut 4... First fastening member 5... Insulator 51... Through hole 6... Bus bar 7... Bus bar holding member 70... Holding member main body 71... Bus bar holding portion , 71A... row of holding parts, 711... peripheral wall part, 72... harness arrangement part, 721... first part, 722... second part, 73... lid part, 731... connecting part, 74... thermistor holding part, 75... opening part , 76... Fixed part 761... First fixed part 762... Extension part 7621... Extension part main body 7621a... Support surface 7621b... Through hole 7622... Recessed part 7625... Reinforcing part 763... Band part 765... Second fixing portion 7651 Insertion portion 7651a Gap 7652 Locking portion 7652a Inclined surface 77 Long member 8 Harness 80 Electric wire 81 Cable portion 82 Connector 10 Power storage element 11 Case 12 Case body 121 Closing portion 122 Body portion 123 Long wall portion 124 Short wall portion 13 Lid plate 131 Lid plate main body 132 Gas exhaust valve, DESCRIPTION OF SYMBOLS 14... External terminal 500... Power supply device 501... Battery 502... Battery assembly 502a... Upper surface 503... Bus bar module 504... Plate 505... Plate main body 506... Accommodating part 507... Electric wire holding part 509 Electric wire 510 Battery main body 510a End face 511 Positive electrode 512 Negative electrode 530 Nut A Device main body B Plate part C Center of terminal member in Y-axis direction D Laminated body E... main body part, F... extension part, R... flow path, S... thermistor

Claims (5)

a plurality of power storage elements arranged in a first direction;
an end member aligned with the plurality of power storage elements in the first direction;
a busbar holding member that holds at least one busbar that electrically connects the power storage elements and that extends in the first direction along the plurality of power storage elements;
an electric wire arranged along the busbar holding member and protruding from one end of the busbar holding member in the first direction;
The busbar holding member is
a first fixing portion arranged at one end in the first direction and to which the electric wire is fixed;
and a second fixing portion fixed to the end member. The second fixing portion is arranged at a position at least partially overlapping with or adjacent to the first fixing portion when viewed from the second direction in which the busbar holding member, the plurality of power storage elements, and the end member are arranged. The power storage device according to claim 1, wherein The end member is
a main body portion that extends along a plane direction perpendicular to the first direction and overlaps the storage element when viewed from the first direction;
an extending portion extending from the body portion along the first direction in a direction away from the power storage element;
The power storage device according to claim 1 or 2, wherein the extension portion engages with the second fixing portion. The extension portion has a through hole penetrating in the second direction at a portion overlapping the busbar holding member when viewed from the second direction in which the busbar holding member, the plurality of power storage elements, and the end members are arranged. death,
4. The power storage device according to claim 3, wherein said second fixing portion extends in said second direction and penetrates said through hole. The end member has a metal termination member and an insulating member disposed between the termination member and the storage element in the first direction to insulate the termination member and the storage element. ,
5. The power storage device according to claim 3, wherein said terminal member has said extended portion.