JP7202538B2 - power storage device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a power storage device that includes a power storage element and an adjacent member aligned with the power storage element and forming a flow path between the power storage element.

Conventionally, there is known a battery system in which spacers are arranged between adjacent battery cells (see, for example, Patent Document 1). Specifically, this battery system includes stacked battery cells 102 and spacers 103 arranged between adjacent battery cells 102, as shown in FIG. The spacer 103 has a plurality of grooves 110 extending to both side ends in a direction perpendicular to the stacking direction of the battery cells 102 on the surface facing the battery cells 102 , thereby allowing a cooling gas such as air to flow between the spacers 103 and the battery cells 102 . A cooling gap 120 is formed for passage. The plurality of grooves 110 are provided parallel to each other at predetermined intervals.

In view of the cooling performance of the cooling gaps 120, there have been requests to extend the cooling gaps (flow paths) 120 in various directions, not limited to the direction extending between both side ends of the spacer 103. FIG.

JP 2009-170258 A

Therefore, an object of the present embodiment is to provide a power storage device in which flow paths extending in various directions are formed.

The power storage device of this embodiment is
a storage element;
an adjoining member that is adjacent to the power storage element in the first direction so as to form a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; prepared,
The flow path has an inlet and an outlet, and has a direction changing portion located midway between the inlet and the outlet and making the direction extending from the inlet and the direction extending to the outlet different.

According to such a configuration, since the direction changing portion is provided between the inlet and the outlet of the flow path, it is possible to provide a power storage device in which flow paths extending in various directions are formed.

In the power storage device,
The adjacent member may control at least one of a flow velocity of the fluid in the direction changing portion and a state of the fluid at the direction changing portion or on the inlet side of the direction changing portion.

According to such a configuration, the adjacent member controls the flow velocity and state of the fluid in the direction changing portion, thereby suppressing the stagnation of the fluid flow in the direction changing portion. can suppress the decrease in

In the power storage device,
The flow path includes a first path including the inlet, the first path extending from the inlet to the direction changing portion in a second direction orthogonal to the first direction, and a pair of second paths each including the outlet. a pair of second paths extending from the direction changing portion to each outlet in one side and the other side in a third direction orthogonal to both the first direction and the second direction;
the adjacent member includes a rib portion arranged in the direction changing portion and protruding toward the power storage element,
the rib portion extends between the pair of second passages so as to branch the flow of the fluid entering the first passage from the inlet into the pair of second passages;
A width of at least a portion of the flow path branched by the rib portion and through which the fluid flows may be narrower than a width of a portion of the flow path on the inlet side of the at least the portion.

According to this configuration, since the width of at least a part of the flow path branched by the rib portion through which the fluid flows is narrower than the width of the portion on the inlet side thereof, the flow speed in the direction changing portion increases, and as a result, the flow speed decreases. It is possible to suppress the deterioration of the cooling performance caused by this.

In the power storage device,
The flow path includes a first path including the inlet, the first path extending from the inlet to the direction changing portion in a second direction orthogonal to the first direction, and a pair of second paths each including the outlet. a pair of second paths extending from the direction changing portion to each outlet in one side and the other side in a third direction orthogonal to both the first direction and the second direction;

The adjacent member may have a wall surface defining the direction changing portion, the wall surface being arranged on an extension line of the first path and extending in the third direction.

According to such a configuration, the fluid that has flowed from the first path to the direction changing portion collides with the wall surface (the wall surface defining the direction changing portion) of the adjacent member that is arranged on the extension line of the first path and extends in the third direction. As a result, turbulence occurs around the wall surface, and by suppressing stagnation of the fluid flow that tends to occur partially in the direction changing portion, it is possible to suppress deterioration in cooling performance caused by this stagnation.

In the power storage device,
A plurality of the storage elements are arranged in the first direction,
each of the plurality of power storage elements has an outer surface facing the second direction;
The adjacent member is disposed between adjacent energy storage elements among the plurality of energy storage elements, and is a contact portion that contacts the outer surface of at least one of the adjacent energy storage elements from the outside in the second direction. with
The inlet of the flow path is located outside the contact portion in the second direction.

According to such a configuration, insulation can be ensured by extending the creepage distance between the positions sandwiching the inlet of the outer surface of the adjacent power storage elements.

In the power storage device,
The adjacent member has a facing portion that is continuous with the contact portion in the third direction and faces the outer surfaces of the adjacent power storage elements while being separated from each other,
The opposing portion is provided with a through-hole constituting an inlet of the flow path,
The contact portion and the facing portion may cover the outer surfaces of the adjacent power storage elements in the third direction.

According to such a configuration, the contact portion and the facing portion are continuous in the third direction and cover the outer surfaces of the adjacent storage elements in the third direction, thereby further ensuring insulation between the outer surfaces of the adjacent storage elements. can.

According to the power storage device of the present embodiment, it is possible to provide a power storage device in which flow paths extending in various directions are formed.

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 front view of adjacent energy storage elements and an adjacent member (third adjacent member) arranged therebetween in the energy storage device. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. FIG. 5 is a perspective view for explaining the configuration of one side and the other side in the X-axis direction of an adjacent member (first adjacent member) in the power storage device. FIG. 6 is a perspective view for explaining flow paths formed on one side and the other side of the adjacent member (first adjacent member) in the X-axis direction. FIG. 7 is a perspective view for explaining the configuration of the other side in the X-axis direction of the adjacent member (second adjacent member) in the power storage device. FIG. 8 is a perspective view for explaining the configuration of one side in the X-axis direction of an adjacent member (a second adjacent member different from the second adjacent member in FIG. 7) in the power storage device. FIG. 9 is a perspective view for explaining a channel formed on the other side of the adjacent member (second adjacent member) in the X-axis direction. FIG. 10 is a perspective view for explaining a channel formed on one side in the X-axis direction of the adjacent member (a second adjacent member different from the second adjacent member in FIG. 7). FIG. 11 is a perspective view for explaining the configuration of one side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 12 is a perspective view for explaining the configuration of the other side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 13 is a front view for explaining the configuration of one side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 14 is a rear view for explaining the configuration of the other side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 15 is a front view for explaining a channel formed on one side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 16 is a rear view for explaining a channel formed on the other side of the adjacent member (third adjacent member) in the X-axis direction. FIG. 17 is a front view for explaining the configuration of one side in the X-axis direction of an adjacent member (third adjacent member) in a power storage device according to a modification. FIG. 18 is a front view for explaining the configuration of one side in the X-axis direction of an adjacent member (third adjacent member) in a power storage device according to a modification. FIG. 19 is a front view for explaining the configuration of one side in the X-axis direction of an adjacent member (third adjacent member) in a power storage device according to a modification. FIG. 20 is a schematic diagram for explaining a conventional power storage device.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 16. 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 an adjacent member 3 adjacent to the power storage element 2 in the first direction. The power storage device 1 of this embodiment includes a plurality of power storage elements 2 arranged in the first direction. In addition, the power storage device 1 of the present embodiment includes a holding member 4 that holds a plurality of power storage elements 2 , an insulator 5 that is arranged along the plurality of power storage elements 2 , and a bus bar that electrically connects different power storage elements 2 . 6, and an external input/output terminal 49 for inputting/outputting to/from the plurality of storage elements 2 (see FIG. 2).

Each of the plurality of 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 storage elements 2 has an electrode body 20, a case 21 that houses the electrode body 20 together with an electrolyte, and external terminals 22 that are at least partially exposed outside the case 21 (see FIG. 4). .

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 (see FIGS. 2 and 4). 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 (see FIGS. 2 and 3). 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 (see FIG. 2). 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 with a gap therebetween. Moreover, the cover plate 216 has a gas exhaust valve 217 capable of exhausting the gas inside the case 21 to the outside. The gas exhaust valve 217 exhausts gas from the inside of the case 21 to the outside when the internal pressure of the case 21 rises to a predetermined pressure. The gas exhaust valve 217 of this embodiment is arranged between the pair of external terminals 22 .

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.

In the following description, the first direction in which the plurality of storage elements 2 are arranged is the X-axis of an orthogonal coordinate system, the third direction in which the short wall portion 215 of the case main body 211 faces is the Y-axis of the orthogonal coordinate system, and the closing portion 212 and the lid The second direction in which the plate 216 faces (the direction in which the outer surface of the closing portion 212 faces) is the Z axis of the orthogonal coordinate system.

The adjacent member 3 is a member arranged between two storage elements 2 adjacent in the X-axis direction, or a storage element 2 at the end in the X-axis direction and a member aligned with the storage element 2 in the X-axis direction (in this embodiment, in the example, part of the holding member 4). The adjacent member 3 is made of, for example, an insulating member such as resin. Further, the adjacent member 3 forms a channel 35 through which a fluid for temperature adjustment (for example, a cooling fluid) can flow between adjacent storage elements 2 (see FIG. 4).

Specifically, the adjacent member 3 is adjacent to the storage element 2 in the X-axis direction, so that a virtual plane (YZ plane (including the Y-axis and the Z-axis) perpendicular to the X-axis direction exists between the adjacent member 3 and the storage element 2. A flow path 35 is formed along the surface )) and through which the fluid can flow. The flow path 35 is a space defined (surrounded) by the energy storage element 2 and the adjacent member 3 that are adjacent in the X-axis direction. Not included. In the channel 35 of the present embodiment, the opening 35a corresponds to the inlet through which the fluid flows, and the opening 35b corresponds to the outlet through which the fluid flows out (see FIGS. 6, 9, 10, 15, and 16). In other words, channel 35 has an inlet 35a and an outlet 35b. The adjacent member 3 of this embodiment forms a plurality of flow paths 35 . At least one flow path 35 among the plurality of flow paths 35 is bent at an intermediate position in the longitudinal direction. The flow path 35 of the present embodiment extends from an opening 35a formed at the other end position of the adjacent member 3 in the Z-axis direction (position corresponding to the closed portion 212 of the storage element 2) to the adjacent member in the Y-axis direction. 3 (positions corresponding to the short walls 215 of the storage element 2) on one side and the other side of the storage element 2 (FIGS. 6, 9, and 10). , see FIG. 15).

The flow path 35 has a direction changing portion 36 as a bent part in the middle of the flow path 35 in the longitudinal direction. The direction changing portion 36 is a portion that is positioned midway between the entrance 35a and the exit 35b and that makes the direction extending from the entrance 35a and the direction extending to the exit 35b different. In the direction changing portion 36 of the present embodiment, the adjacent member 3 controls at least one of the flow velocity of the fluid in the direction changing portion 36 and the state of the fluid.

Hereinafter, the adjacent member 3 arranged between two adjacent energy storage elements 2 at a substantially central position of the energy storage device 1 in the X-axis direction is referred to as a first adjacent member 31, and the energy storage element 2 at the endmost in the X-axis direction (in the example of this embodiment, between the holding member 4 and the endmost energy storage element 2) adjacent to the energy storage element 2 is referred to as a second adjacent member 32, and is the second adjacent member 32 in the X-axis direction. Between the first adjacent member 31 and the second adjacent member 32, the adjacent member 3 arranged between two adjacent energy storage elements 2 may be referred to as a third adjacent member 33 (see FIG. 2).

In the power storage device 1 of the present embodiment, the first adjacent member 31 is arranged between the power storage elements 2 at substantially the center position in the X-axis direction, and the second adjacent member 32 is arranged between the plurality of power storage elements 2 arranged in the X-axis direction. Arranged on both outer sides, the third adjacent members 33 are respectively arranged between the storage elements 2 except between the storage elements 2 where the first adjacent members 31 are arranged. That is, the power storage device 1 includes one first adjacent member 31 , a pair of second adjacent members 32 , and multiple third adjacent members 33 .

The first adjacent member 31 includes a substantially rectangular plate-shaped first body portion 311 positioned between two adjacent energy storage elements 2 in the X-axis direction, and the first body portion 311 of the energy storage element 2 adjacent to the first body portion 311 . and a first restricting portion 312 that restricts relative movement with respect to the main body portion 311 (see FIG. 5). The first adjacent member 31 also has a first opposing portion 317 extending in the X-axis direction from a portion of the first restricting portion 312, and a first seal rib 318 extending in the X-axis direction from the first body portion 311 and the like. . In addition, in the first adjacent member 31 of the present embodiment, the configuration on one side in the X-axis direction and the configuration on the other side in the X-axis direction are the same. In other words, the first adjacent member 31 has a symmetrical shape in the X-axis direction with respect to the YZ plane passing through the center in the X-axis direction. The configuration of one side of the first adjacent member 31 in the X-axis direction will be described below. The configuration of the other side of the first adjacent member 31 in the X-axis direction is the same as the configuration of the one side of the first adjacent member 31 in the X-axis direction.

The first body portion 311 includes a portion that overlaps with the long wall portion 214 of the case 21 of the storage element 2 when viewed in the X-axis direction, and extends in the YZ plane direction. The first main body portion 311 of the present embodiment includes an overlapping portion 3116 that overlaps the long wall portion 214 when viewed in the X-axis direction, and an end edge located on the other side of the overlapping portion 3116 in the Z-axis direction. and an extension portion 3117 extending to the other side in the Z-axis direction. The extending portion 3117 is located on the other side in the Z-axis direction than the closing portion 212 of the storage element 2 adjacent to the first body portion 311 in the X-axis direction.

In addition, first body portion 311 has a plurality of first protrusions 3112 protruding from surface 3111 facing power storage element 2 . The first protrusion 3112 contacts the storage element 2 (outer surface of the long wall portion 214 ) adjacent to the first body portion 311 , so that the storage element 2 (outer surface of the long wall portion 214 ) faces the storage element 2 . A gap is formed between the surface 3111 and the gap constitutes the flow path 35 . Specifically, in the first main body portion 311, the first protrusion 3112 contacts the power storage element 2 (the outer surface of the long wall portion 214) adjacent to the first main body portion 311, so that the power storage element 2 (long wall portion 214 A gap is formed between the surface 3111 of the first main body portion 311 and a spaced region 3115 where the first ridge 3112 does not protrude, and this gap constitutes the flow path 35 .

The dimension in the X-axis direction of the first body portion 311 corresponds to the dimension in the X-axis direction of the portion corresponding to the first body portion 311 in the second adjacent member 32 and the first body portion 311 in the third adjacent member 33. larger than the dimension in the X-axis direction of the portion to be covered (see FIG. 2). Both ends of the first body portion 311 in the Y-axis direction are fixed to the holding member 4 . The first body portion 311 of this embodiment is fixed to the holding member 4 by bolts 315 .

The first restricting portion 312 extends from the first body portion 311 in the X-axis direction, and contacts the storage element 2 (specifically, the case 21) adjacent to the first body portion 311 from the outside in the YZ plane direction. It restricts the relative movement of the storage element 2 in the YZ plane direction with respect to the first body portion 311 (see FIG. 5). The first restricting portion 312 of the present embodiment includes a first restricting portion 312A extending outward in the X-axis direction from a pair of corner portions 3113 positioned on one side in the Z-axis direction of the first main body portion 311, and a first restricting portion 312A extending outward in the X-axis direction. and a first restricting portion 312B extending outward in the X-axis direction from a pair of corner portions 3114 positioned on the other side in the Z-axis direction of 311 .

The first restricting portion 312A extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3113 of the first body portion 311, and is adjacent to the first body portion 311. It abuts on the corner of the mating storage element 2 (case 21) from the outside in the direction of the XZ plane (the plane including the X axis and the Z axis).

The first restricting portion 312B extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3114 of the first body portion 311, and is adjacent to the first body portion 311. It abuts on the corner of the matching storage element 2 (case 21) from the outside in the XZ plane direction. A pair of the first restricting portions 312B of the present embodiment are arranged side by side with a space therebetween in the Y-axis direction. The first restricting portion 312B of the present embodiment includes a first extending portion 3120 extending outward in the X-axis direction from the edge of the corner portion 3114 extending in the Z-axis direction, and an end of the corner portion 3114 extending in the Y-axis direction. A first contact portion (second extension portion) 316 extends outward in the X-axis direction from the edge and contacts the closed portion 212 of the storage element 2 .

The first contact portion 316 is in contact with the closed portion 212 of the storage element 2 adjacent to the first body portion 311 in the X-axis direction from the outside in the Z-axis direction (the other side in the Z-axis direction). The first contact portion 316 of the present embodiment includes a rectangular plate-shaped body region 3160 that is continuous with the edge of the first extended portion 3120 and the edge of the corner portion 3114 extending in the Y-axis direction, and the Y-axis of the body region 3160 . It protrudes toward the closed portion 212 of the power storage element 2 (for example, to one side in the Z-axis direction) from the outer end portion in the X-axis direction, which is substantially in the center in the axial direction, and its tip contacts the closed portion 212 . and a contact region 3161 . At the end located inside in the Y-axis direction of the inner (base end side) edge of the main body region 3160 in the X-axis direction (the boundary position of the main body region 3160 with the first main body portion 311 (overlapping portion 3116)) is provided with one through hole 3162 . The through hole 3162 constitutes an opening (inlet) 35 a of the flow path 35 . The contact area 3161 is a ridge having an elongated shape along the Y-axis direction.

The first opposing portion 317 is arranged at intervals in the Y-axis direction between the first restricting portions 312B, and is continuous with the first restricting portion 312B (for example, the first contact portion 316) in the Y-axis direction. It is a portion extending outward in the X-axis direction from the edge (tip) on the other side in the Z-axis direction of the projecting portion 3117 . In addition, the first facing portion 317 faces the closing portion 212 of the storage element 2 adjacent to the first main body portion 311 in the X-axis direction while being spaced apart. Therefore, the first facing portion 317, together with the first contact portion 316, blocks the closing portion 212 of the storage element 2 adjacent to the first body portion 311 in the X-axis direction in the Y-axis direction (for example, in the entire Y-axis direction). ). A plurality of through holes are formed in the inner (base end) edge of the first opposing portion 317 in the X-axis direction (the boundary position between the first opposing portion 317 and the first main body portion 311 (extending portion 3117)). 3170 is provided. The through hole 3170 constitutes an opening (inlet) 35 a of the flow path 35 .

The first sealing rib 318 of the present embodiment includes a first sealing rib 318A arranged on one side of the first main body portion 311 in the Z-axis direction, and a first sealing rib 318A arranged on the other side of the first main body portion 311 in the Z-axis direction. and sealing ribs 318B.

The first sealing rib 318A includes a portion of the first restricting portion 312A extending inward in the Y-axis direction from a portion extending in the Z-axis direction, and a portion extending inward in the Y-axis direction from the portion extending in the Z-axis direction of the first restricting portion 312A. and a portion extending in the X-axis direction from the portion. Thereby, the first sealing rib 318A seals the space at one end of the first body portion 313 in the Z-axis direction together with the first restricting portion 312A.

The first seal rib 318B extends inward in the Y-axis direction from a portion of the first restricting portion 312B that extends in the Z-axis direction, and is continuous with this portion and the other end of the first main body portion 311 in the Z-axis direction. and a portion extending outward in the X-axis direction from a region between the outer edge in the Y-axis direction of the portion (the end portion of the overlapping portion 3116 on the other side in the Z-axis direction) and a midway position. As a result, the first seal rib 318B, together with the first restricting portion 312 and the first contact portion 316 located on the other side in the Z-axis direction, seals the space at the corner portion on the other side in the Z-axis direction of the first body portion 313. are doing.

The above-described first adjacent members 31 form flow paths 35 (for example, 13 flow paths 35) together with adjacent power storage elements 2 (see FIG. 6). The flow paths 35 formed by the first adjacent member 31 include, for example, a flow path 350 arranged in the center in the Y-axis direction and six flow paths 351 arranged on one side of the flow paths 350 in the Y-axis direction. and six channels 352 arranged on the other side of the channel 350 in the Y-axis direction. Direction changing portions 360 , 361 and 362 are arranged as the direction changing portion 36 in the flow paths 350 , 351 and 352 , respectively. Also, the channels 350 , 351 , 352 extend substantially linearly except for the direction changing portions 360 , 361 , 362 .

The channel 350 is a first channel 3501 including an inlet 35a, a first channel 3501 extending in the Z-axis direction from the inlet 35a to a direction changing portion 360, and a pair of second channels 3502 each including an outlet 35b. , and a pair of second paths 3502 extending from the direction changing portion 360 to each outlet 35b in one side and the other side in the Y-axis direction. The direction changing part 360 converts the flow of fluid from the other side to the one side in the Z-axis direction to branch the flow of fluid to the one side and the other side in the Y-axis direction. The direction changing portion 360 of this embodiment is arranged substantially in the center of the first main body portion 311 in the Y-axis direction.

The flow path 351 includes a first path 3511 extending in the Z-axis direction from the inlet 35a to the direction changing portion 361, and a third path 3512 including the outlet 35b. and a third passage 3512 extending to the The direction conversion part 361 converts a fluid flow from the other side to the other side in the Z-axis direction into a fluid flow from the one side to the other side in the Y-axis direction.

The flow path 352 includes a first path 3521 extending in the Z-axis direction from the inlet 35a to the direction changing portion 362, and a fourth path 3522 including the outlet 35b. and a fourth passage 3522 extending to the The direction conversion part 362 converts the fluid flow from the other side to the one side in the Z-axis direction into the fluid flow from the other side to the one side in the Y-axis direction.

The flow paths 351 and 352 except for the inlet 35a of the flow path 350 formed by the first adjacent member 31 and the pair of flow paths 351 and 352 located on the outermost side in the Y-axis direction of the flow paths 351 and 352 All of the inlets 35a are located outside the first contact portion 316 in the Z-axis direction (on the other side in the Z-axis direction). The inlet 35a of the channel 350 of the present embodiment and the inlet 35a of the channels 351 and 352 except for the pair of channels 351 and 352 positioned outermost in the Y-axis direction among the channels 351 and 352 are the first Since it is located at the inner (proximal) edge of the opposing portion 317 in the X-axis direction (the boundary position of the first opposing portion 317 with the first main body portion 311 (extending portion 3117)), the first It is separated in the Z-axis direction from the outer surface of the closed portion 212 of the storage element 2 adjacent to the main body portion 311 in the X-axis direction by the dimension of the extending portion 3117 in the Z-axis direction.

The second adjacent member 32 includes a substantially rectangular plate-shaped second body portion 321 positioned between the storage element 2 and the holding member 4, and the second body portion 321 of the storage element 2 adjacent to the second body portion 321. and a second restricting portion 322 that restricts relative movement with respect to (see FIGS. 7 and 8). The second adjacent member 32 also has a second facing portion 327 extending in the X-axis direction from a part of the second restricting portion 322, and a second sealing rib 328 extending in the X-axis direction from the second body portion 321 and the like. . In the second adjacent member 32 of the present embodiment, the second adjacent member 32 (see FIG. 7) arranged on one side in the X-axis direction in FIG. 2 and the second adjacent member 32 arranged on the other side in the X-axis direction in FIG. Since the second adjacent member 32 (see FIG. 8) having the same structure has the second main body portion 321, the second restricting portion 322, and the second sealing rib 328 on the side facing the storage element 2, These configurations will be described using the second adjacent member 32 in FIG.

The second body portion 321 includes a portion that overlaps with the long wall portion 214 of the case 21 of the storage element 2 when viewed in the X-axis direction, and extends in the YZ plane direction. The second main body portion 321 of this embodiment includes an overlapping portion 3216 that overlaps the long wall portion 214 when viewed in the X-axis direction, and an end edge located on the other side of the overlapping portion 3216 in the Z-axis direction. and an extension portion 3217 extending to the other side in the Z-axis direction. The extending portion 3217 is positioned on the other side in the Z-axis direction from the closing portion 212 of the storage element 2 adjacent to the first body portion 311 in the X-axis direction.

In addition, the second body portion 321 has a plurality of second ridges 3212 that protrude from the surface 3211 facing the power storage element 2 . The second protrusion 3212 abuts against the storage element 2 (outer surface of the long wall portion 214 ) adjacent to the second body portion 321 , thereby forming a gap between the storage element 2 (outer surface of the long wall portion 214 ) and the surface 3211 . is formed, and this gap constitutes the flow path 35 . In the second body portion 321 of the present embodiment, a second protrusion 3212 protrudes from a surface 3211 facing the power storage element 2 side.

By forming the second protrusion 3212 on the surface 3211 facing the power storage element 2 in this manner, the flow path 35 is formed between the second body portion 321 and the power storage element 2 adjacent to the second body portion 321 . be done. Specifically, on the side of the energy storage element 2 in the X-axis direction, the second protrusion 3212 contacts the energy storage element 2 (the outer surface of the long wall portion 214) adjacent to the second main body portion 321, so that the energy storage element 2 ( A gap is formed between the outer surface of the long wall portion 214 and a spaced region 3213 where the second protrusion 3212 does not protrude in the surface 3211 facing the storage element 2 , and this gap constitutes the flow path 35 .

The second restricting portion 322 extends from the second body portion 321 in the X-axis direction, and contacts the storage element 2 (specifically, the case 21) adjacent to the second body portion 321 from the outside in the YZ plane direction. It restricts the relative movement of the storage element 2 in the YZ plane direction with respect to the second body portion 321 (see FIG. 2). The second restricting portion 322 of the present embodiment includes a second restricting portion 322A extending outward in the X-axis direction from a pair of corner portions 3214 located on one side in the Z-axis direction of the second body portion 321, and a second body portion 322A. and a second restricting portion 322B extending outward in the X-axis direction from a pair of corner portions 3215 located on the other side of 321 in the Z-axis direction.

The second restricting portion 322A extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3214 of the second body portion 221, and is adjacent to the second body portion 221. It abuts on the corner of the matching storage element 2 (case 21) from the outside in the XZ plane direction.

The second restricting portion 322B extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3215 of the second body portion 221, and is adjacent to the second body portion 221. It abuts on the corner of the matching storage element 2 (case 21) from the outside in the XZ plane direction. A pair of the second restricting portions 322B of the present embodiment are arranged in a state of being spaced apart in the Y-axis direction. The second restricting portion 322B of the present embodiment includes a first extending portion 3220 extending outward in the X-axis direction from an edge of the corner portion 3215 extending in the Z-axis direction, and an end of the corner portion 3215 extending in the Y-axis direction. A second contact portion (second extension portion) 326 extends outward in the X-axis direction from the edge and contacts the closed portion 212 of the storage element 2 .

The second contact portion 326 is in contact with the closed portion 212 of the storage element 2 adjacent to the second body portion 321 in the X-axis direction from the outside in the Z-axis direction (the other side in the Z-axis direction) (see FIG. 2). . The second contact portion 326 of the present embodiment includes a rectangular plate-shaped body region 3260 that is continuous with the edge of the first extended portion 3220 and the edge of the corner portion 3215 extending in the Y-axis direction, and the Y-axis of the body region 3260 . It protrudes toward the closed portion 212 of the power storage element 2 (for example, to one side in the Z-axis direction) from the outer end portion in the X-axis direction, which is substantially in the center in the axial direction, and its tip contacts the closed portion 212 . and a contact area 3261 . At the end located inside in the Y-axis direction of the inner (base end side) edge of the main body region 3160 in the X-axis direction (the boundary position of the main body region 3260 with the second main body portion 321 (overlapping portion 3216)) , the inlet 35a of the flow path 35 is arranged. The contact area 3261 is a ridge having an elongated shape along the Y-axis direction.

The second opposing portion 327 is arranged at intervals in the Y-axis direction between the second restricting portions 322B, and is continuous with the second restricting portion 322B (for example, the second contact portion 326) in the Y-axis direction. It is a portion extending outward in the X-axis direction from the projecting portion 3217 . In addition, the second facing portion 327 faces the closing portion 212 of the storage element 2 adjacent to the second body portion 321 in the X-axis direction while being spaced apart. Therefore, the second facing portion 327, together with the second contact portion 326, blocks the closing portion 212 of the storage element 2 adjacent to the second body portion 321 in the X-axis direction in the Y-axis direction (for example, in the entire Y-axis direction). ). A plurality of openings 35a are provided in the inner (base end) edge of the second facing portion 327 in the X-axis direction (the boundary position between the second main body portion 321 (extending portion 3217) and the second facing portion 327). are placed.

The second sealing rib 328 of the present embodiment includes a second sealing rib 328A arranged on one side of the second main body portion 321 in the Z-axis direction, and a second sealing rib 328A arranged on the other side of the second main body portion 321 in the Z-axis direction. and sealing ribs 328B. The configuration of the second sealing ribs 328A, 328B is the same as the configuration of the second sealing ribs 328A, 328B of the first adjacent member 31 .

The above-described second adjacent members 32 form flow paths 35 (for example, nine flow paths 35) together with adjacent power storage elements 2 (see FIGS. 9 and 10). Specifically, the channel 35 formed by the second adjacent member 32 includes a channel 350 arranged in the center in the Y-axis direction and four channels arranged on one side of the channel 350 in the Y-axis direction. A channel 351 and four channels 352 arranged on the other side of the channel 350 in the Y-axis direction are formed. The configurations of the channels 350, 351, 352 are the same as the configurations of the channels 350, 351, 352 formed by the first adjacent member 31, respectively.

The flow paths 351 and 352 except for the inlet 35a of the flow path 350 formed by the second adjacent member 32 and the pair of flow paths 351 and 352 positioned outermost in the Y-axis direction among the flow paths 351 and 352 All of the inlets 35a are located outside the second contact portion 326 in the Z-axis direction (on the other side in the Z-axis direction). The inlet 35a of the channel 350 of the present embodiment and the inlet 35a of the channels 351 and 352 except for the pair of channels 351 and 352 positioned outermost in the Y-axis direction among the channels 351 and 352 are the second Since it is located at the inner (proximal) edge of the opposing portion 327 in the X-axis direction (the boundary position of the second opposing portion 3127 with the second main body portion 321 (extending portion 3217)), the second It is separated in the Z-axis direction from the outer surface of the closed part 212 of the storage element 2 adjacent to the main body part 321 in the X-axis direction by the dimension of the extension part 3217 in the Z-axis direction.

Each of the plurality of third adjacent members 33 includes a substantially rectangular plate-shaped third body portion 331 positioned between two adjacent energy storage elements 2 in the X-axis direction, and the energy storage element 2 adjacent to the third body portion 331. and a third restricting portion 332 that restricts the relative movement with respect to the third body portion 331 (see FIGS. 11 and 12). The third adjacent member 33 also has a third opposing portion 337 extending in the X-axis direction from a portion of the third restricting portion 332, and a third seal rib 338 extending in the X-axis direction from the third body portion 331 and the like. .

The third main body portion 331 includes a portion that overlaps the long wall portion 214 of the case 21 of the storage element 2 when viewed in the X-axis direction, and extends in the YZ plane direction. The third main body portion 331 has a first surface 3311 that is a surface on one side in the X-axis direction and a second surface 3312 that is a surface on the other side in the X-axis direction (see FIGS. 11 to 14). . The third main body portion 331 of the present embodiment includes an overlapping portion 3316 that overlaps the long wall portion 214 when viewed in the X-axis direction, and an end edge located on the other side of the overlapping portion 3316 in the Z-axis direction. and an extension portion 3317 extending to the other side in the Z-axis direction. The extending portion 3317 is positioned on the other side in the Z-axis direction from the closing portion 212 of the storage element 2 adjacent to the third main body portion 331 in the X-axis direction.

Each of the first surface 3311 and the second surface 3312 includes contact portions 3311a and 3312b that contact the storage element 2 (the outer surface of the long wall portion 214) adjacent to the third main body portion 331, Spaced portions 3311b and 3312a spaced apart from the element 2 (the outer surface of the long wall portion 214). The contact portion 3311a and the separation portion 3311b included in the first surface 3311 and the contact portion 3312b and the separation portion 3312a included in the second surface 3312 are arranged at corresponding positions. Specifically, the contact portion 3311a of the first surface 3311 overlaps the spaced portion 3312a of the second surface 3312 when viewed from the X-axis direction, and the spaced portion 3311b of the first surface 3311 overlaps the spaced portion 3311b when viewed from the X-axis direction. It overlaps with the contact portion 3312 b of the surface 3312 .

In this manner, the first surface 3311 and the second surface 3312 are each formed with an uneven shape, and the uneven shape allows a flow path between the third main body portion 331 and the storage element 2 adjacent to the third main body portion 331 . 35 are formed. Specifically, on the first surface 3311 side in the X-axis direction, the contact portion 3311a contacts the storage element 2 (the outer surface of the long wall portion 214) adjacent to the third main body portion 331, whereby the storage element 2 ( A gap is formed between the outer surface of the long wall portion 214 and the separation portion 3311b, and this gap constitutes the flow path 35 (see FIGS. 11, 13, and 15). Similarly, on the side of the second surface 3312 in the X-axis direction, the contact portion 3312b contacts the storage element 2 adjacent to the third main body portion 331, thereby 3312a, and this gap constitutes the channel 35 (see FIGS. 12, 14, and 16). In addition, in the third adjacent member 33 of the present embodiment, the contact portion 3312b (located on the most one side of the second surface 3312 in the Z-axis direction) is formed at one end of the second surface 3312 in the Z-axis direction. The contact portion 3312b) is not adjacent to the flow path 35 on one side in the Z-axis direction, and is adjacent to the flow path 35 only on the other side in the Z-axis direction.

The third restricting portion 332 extends from the third body portion 331 in the X-axis direction, and contacts the storage element 2 (specifically, the case 21) adjacent to the third body portion 331 from the outside in the YZ plane direction. It restricts the relative movement of the storage element 2 in the YZ plane direction with respect to the third body portion 331 (see FIGS. 11 to 14). The third restricting portion 332 of the present embodiment includes a third restricting portion 332A extending outward in the X-axis direction from a pair of corner portions 3313 located on one side in the Z-axis direction of the third main body portion 331, and a first main body portion 332A. and a third restricting portion 332B extending outward in the X-axis direction from a pair of corner portions 3314 located on the other side of 311 in the Z-axis direction.

The third restricting portion 332A extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3313 of the third body portion 331, and is adjacent to the third body portion 331. It abuts on the corner of the matching storage element 2 (case 21) from the outside in the XZ plane direction.

The third restricting portion 332B extends outward in the X-axis direction from the edge extending in the Y-axis direction and the edge extending in the Z-axis direction of the pair of corner portions 3314 of the third body portion 331, and is adjacent to the third body portion 331. It abuts on the corner of the matching storage element 2 (case 21) from the outside in the XZ plane direction. A pair of the third restricting portions 332B of the present embodiment are arranged side by side with a space therebetween in the Y-axis direction. The third restricting portion 332B of the present embodiment includes a first extending portion 3320 extending outward in the X-axis direction from the edge of the corner portion 3314 extending in the Z-axis direction, and an end of the corner portion 3314 extending in the Y-axis direction. A third contact portion (second extension portion) 336 extends outward in the X-axis direction from the edge and contacts the closed portion 212 of the storage element 2 (see FIGS. 11 and 12).

The third contact portion 336 contacts the closed portion 212 of the storage element 2 adjacent to the third body portion 331 in the X-axis direction from the outside in the Z-axis direction (the other side in the Z-axis direction). The third contact portion 336 of the present embodiment includes a rectangular plate-shaped body region 3360 that is continuous with the edge of the first extended portion 3320 and the edge of the corner portion 3314 extending in the Y-axis direction, and the Y-axis of the body region 3360 . It protrudes toward the closed portion 212 of the power storage element 2 (for example, to one side in the Z-axis direction) from the outer end portion in the X-axis direction, which is substantially in the center in the axial direction, and its tip contacts the closed portion 212 . and a contact region 3361 (see FIGS. 11-14). The contact area 3361 is a ridge having an elongated shape along the Y-axis direction.

In the main body region 3360 arranged on the first surface 3311 side of the present embodiment, the inner (base end side) edge of the main body region 3360 in the X-axis direction (the third main body portion 331 in the main body region 3360 (overlapping portion 3316) One through-hole 3362 is provided at the end positioned inside in the Y-axis direction of the boundary position between the two (see FIGS. 11, 13, and 15). The through hole 3162 constitutes an opening (inlet) 35 a of the flow path 35 .

The third opposing portion 337 is arranged at intervals in the Y-axis direction between the third restricting portions 332B, is continuous with the third restricting portion 332B (for example, the third contact portion 336) in the Y-axis direction, and extends. It is a portion extending outward in the X-axis direction from the projecting portion 3317 . In addition, the third facing portion 337 faces the closing portion 212 of the storage element 2 adjacent to the third main body portion 331 in the X-axis direction while being separated therefrom. Therefore, the third facing portion 337, together with the third contact portion 336, blocks the closing portion 212 of the storage element 2 adjacent to the third body portion 331 in the X-axis direction in the Y-axis direction (for example, in the entire Y-axis direction). ). A plurality of through-holes are formed in the inner (proximal) edge of the third opposing portion 337 in the X-axis direction (the boundary position of the third opposing portion 337 with the third main body portion 331 (extending portion 3317)). 3370 is provided. The through hole 3370 constitutes an opening (inlet) 35 a of the flow path 35 .

The third seal rib 338 includes a third seal rib 338A arranged on one side of the third main body portion 331 in the Z-axis direction, a third seal rib 338B arranged on the other side of the third main body portion 331 in the Z-axis direction, including. In addition, the third sealing rib 338A of the present embodiment is arranged only on one surface (for example, the first surface 3311) of the third main body portion 331. As shown in FIG. The configuration of the third sealing ribs 338A and 338B of the present embodiment is the same as the configuration of the first sealing ribs 318A and 318B of the first adjacent member 31 and the configuration of the second sealing ribs 321A and 328B of the second adjacent member 32. are identical.

The first surface 3311 of the third adjacent member 33 described above forms the flow paths 35 (for example, five flow paths 35) together with the adjacent power storage elements 2 (see FIG. 15). Specifically, the flow path 35 formed by the first surface 3311 includes a flow path 350 arranged in the center in the Y-axis direction and two flow paths arranged on one side of the flow path 350 in the Y-axis direction. 351 and two flow paths 352 arranged on the other side of the flow path 350 in the Y-axis direction. The configurations of the channels 350, 351, 352 are the same as the configurations of the channels 350, 351, 352 formed by the first adjacent member 32, respectively.

In addition, the second surface 3312 of the third adjacent member 33 forms a channel 35 (for example, four channels 35) together with the adjacent power storage elements 2 (see FIG. 16). Specifically, the flow paths 35 formed by the second surface 3312 include two flow paths 351 arranged on one side in the Y-axis direction and two flow paths 351 arranged on the other side in the Y-axis direction with respect to the flow paths 350. and a flow path 352 . The configurations of the channels 351 and 352 are the same as the configurations of the channels 351 and 352 formed by the first adjacent member 32, respectively.

Note that the inlet 35a of the flow path 350 formed by the first surface 3311 of the third adjacent member 33 and the pair of flow paths 351 and 352 positioned outermost in the Y-axis direction among the flow paths 351 and 352 are excluded. The inlets 35a of the paths 351 and 352 are both located outside the third contact portion 336 in the Z-axis direction (on the other side in the Z-axis direction) (see FIG. 15). The inlet 35a of the flow path 350 formed by the first surface 3311 of the third adjacent member 33, and the pair of flow paths 351 and 352 positioned outermost in the Y-axis direction among the flow paths 351 and 352 formed by the first surface 3311. The inlets 35a of the channels 351 and 352 except for the inlets 35a of the channels 351 and 352 formed by the second surface 3312 are the inner (base end) edge of the third facing portion 337 in the X-axis direction. Since it is located at (the boundary position of the third facing portion 337 with the third main body portion 331 (extending portion 3317)), the closing portion 212 of the power storage element 2 adjacent to the third main body portion 331 in the X-axis direction It is separated from the outer surface in the Z-axis direction by the dimension of the extending portion 3317 in the Z-axis direction.

The inlets 35a of the flow paths 351 and 352 formed by the second surface 3312 of the third adjacent member 33 are both located outside the third contact portion 336 in the Z-axis direction (on the other side in the Z-axis direction). (See FIG. 16). The inlets 35a of the flow paths 351 and 352 formed by the second surface 3312 of the third adjacent member 33 are located at the inner (base end) edge of the third opposing portion 337 in the X-axis direction ( Since it is positioned at the boundary position with the third main body portion 331 (extending portion 3317), the extending portion 3317 extends from the outer surface of the closing portion 212 of the power storage element 2 adjacent to the third main body portion 331 in the X-axis direction. are separated in the Z-axis direction by the Z-axis dimension of .

In each of the channels 350, 351, 352 formed by the first surface 3311 and the channels 351, 352 formed by the second surface 3312, the width of the channel 35 at the inlet 35a is equal to the width of the channel 35 at the outlet 35b. It is substantially the same as the width (see FIGS. 15 and 16). In the channels 350, 351, and 352 of the present embodiment, the width of the channel 35 at each inlet 35a is uniform, and the width of the channel 35 at each outlet 35b is uniform. The width of the channel 35 is the width in the direction perpendicular to the direction in which the fluid flows in the channel 35 (for example, the longitudinal direction of the channel 35).

The third adjacent member 33 of this embodiment includes a rib portion 3311c arranged in the direction changing portion 360 (see FIGS. 11 and 13). The rib portion 3311c of the present embodiment is included only on one surface (for example, the first surface 3311) of the third main body portion 331 in the X-axis direction. One rib portion 3311 c is provided for one first surface 3311 . In addition, the entire area of the channel 350 where the rib portion 3311 c is arranged is included in the direction changing portion 360 .

The rib portion 3311c extends between the pair of second passages 3102 so as to branch the flow of fluid entering the first passage 3501 from the inlet 35a into the pair of second passages 3102 (see FIG. 15). In addition, the rib portion 3311c extends to the other side in the Z-axis direction from a portion located substantially in the center in the Y-axis direction of the contact portion 3311a provided at one end of the first surface 3311 in the Z-axis direction. (See FIGS. 11 and 13). The rib portion 3311c of the present embodiment is integrated with the contact portion 3311a provided at one end of the first surface 3311 in the Z-axis direction. In addition, the protrusion amount in the X-axis direction of the rib portion 3311c of the present embodiment (the protrusion height in the X-axis direction of the rib portion 3311c from one side surface in the X-axis direction of the first main body portion 311) It is substantially the same as the distance from the spaced portion 3311 b of the first surface 3311 of the portion 331 to the storage element 2 (case 21 ) adjacent to the first surface 3311 . The rib portion 3311c of this embodiment includes a base portion 3311d whose width in the Y-axis direction increases toward one side in the Z-axis direction, and a Z-axis width from the tip of the base portion 3311d located on the other side in the Z-axis direction. and an extending portion 3311e extending to the other side in the axial direction.

The outer surface of the base portion 3311d is a curved surface convex to one side in the Z-axis direction, and this outer surface has an arc shape when viewed from the X-axis direction. The outer surface of the base portion 3311d has a smooth curved surface as a whole, and does not have a stepped portion, concave portions, convex portions, or the like. Further, inside the base portion 3311d, an opening having a substantially triangular shape and facing in the X-axis direction is provided.

The width of the extending portion 3311e in the Y-axis direction is uniform at any position in the Z-axis direction. In addition, the extending portion 3311e extends linearly along the Z-axis direction. The extending portion 3311e of the present embodiment extends so as to overlap the center of the channel 350 in the Y-axis direction.

The third facing portion 337 of the third adjacent member 33 described above is continuous in the X-axis direction with the first facing portion 317 of the first adjacent member 31 adjacent in the X-axis direction with the power storage element 2 interposed therebetween. In this way, the third opposing portion 337 of the third adjacent member 33 extends continuously in the X-axis direction along with the adjacent first opposing portion 317 along the closing portion 212 of the storage element 2, so that the adjacent third opposing portion 337 Between the first adjacent member 31 and the third adjacent member 33, a space is provided that is continuous with the closed portion 212 of the storage element 2 sandwiched between them and extends in the X-axis direction. As a result, the fluid flowing in from the inlet 35a of the flow path 35 formed by the first adjacent member 31 and the storage element 2 adjacent to the first adjacent member 31 and the fluid flowing through the first adjacent member 31 and the storage element 2 sandwiched therebetween. Since the fluid flowing in from the inlet 35a of the channel 35 formed by the adjacent third adjacent member 33 and the storage element 2 flows through the communicating space, these channels 35 communicate with each other through this space. do.

Similarly, the third facing portion 337 of the third adjacent member 33 is continuous in the X-axis direction with the second facing portion 327 of the second adjacent member 32 adjacent in the X-axis direction with the power storage element 2 interposed therebetween. Since the third facing portion 337 of the member 33 extends continuously in the X-axis direction along the closed portion 212 of the storage element 2 together with the adjacent second facing portion 327, the adjacent first adjacent member 31 and the third adjacent member 33 extend continuously in the X-axis direction. Between adjacent members 33 , a space is provided that is continuous and extends in the X-axis direction between closed portions 212 of storage elements 2 sandwiched between them. As a result, the fluid flowing in from the inlet 35a of the channel 35 formed by the third adjacent member 33 and the power storage element 2 adjacent to the third adjacent member 33 flows through the communicating space, and then flows through the third adjacent member 33. and the flow path 35 formed by the third adjacent member 33 and the adjacent storage element 2, and the second adjacent member 32 and the storage element 2 adjacent to each other across the third adjacent member 33 and the storage element 2 are formed. Since the flow paths 35 are branched and circulated, the flow paths 35 communicate with each other through this space. Therefore, at the inlet 35a of the flow path 35 of the second adjacent member 32, the inlet of the flow path 35 formed in the third adjacent member 33 adjacent to the second adjacent member 32 with the storage element 2 interposed therebetween in the X-axis direction. Fluid flows in from 35a (through hole 3370, see FIG. 11). Specifically, the fluid that has flowed in from the inlet 35a of the flow path 35 formed in the third facing portion 337 of the third adjacent member 33 moves toward the Z axis of the closed portion 212 of the storage element 2 adjacent to the third adjacent member 33. After moving to the opposite side in the X-axis direction through the space located on the other side in the direction, it spreads to both sides in the Y-axis direction and flows into the inlet 35 a of the flow path 35 of the second adjacent member 32 .

The holding member 4 holds the plurality of storage elements 2 and the plurality of adjacent members 3 together by surrounding the plurality of storage elements 2 and the plurality of adjacent members 3 (see FIG. 1). 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 43 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 connection member 43 . In the power storage device 1 of the present embodiment, the pair of connecting members 43 connects both ends of the pair of terminal members 40 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. Each of the pair of termination members 40 includes a termination member main body 41 that spreads along the YZ plane and overlaps the storage element 2 when viewed from the X-axis direction, and an extension portion 42 that extends from the termination member main body 41. , (see FIG. 2).

The terminal member main body 41 is a rectangular portion corresponding to the storage element 2 . The extended portion 42 is used to fix the power storage device 1 to the installation surface. The termination member 40 of this embodiment has two extensions 42 spaced apart in the Y-axis direction.

A pair of connection members 43 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 43 includes a connection member main body 44 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 44 on the other side in the Z-axis direction. a first extension portion 46 extending in the Y-axis direction from and along the closed portion 212 of each of the plurality of power storage elements 2; and a second extension portion extending from the first extension portion 46 to the other side in the Z-axis direction. 47 and . Each of the pair of connection members 43 has a connected portion 48 extending in the Y-axis direction from each end of the connection member main body 44 in the X-axis direction along the surface of the termination member 40 facing outward in the X-axis direction. have.

The connection member main body 44 includes a pair of beam portions 441 each extending in the X-axis direction with an interval in the Z-axis direction, and a pair of beam portions 441 extending in the Z-axis direction and corresponding to each other (opposing in the Z-axis direction). a pair of end connection portions 442 connecting the ends to each other, and a plurality of connecting portions each extending in the Z-axis direction and connecting the portions facing the Z-axis direction at intermediate positions in the X-axis direction of the pair of beam portions 441. and an intermediate connection portion 443 of . The plurality of intermediate connection portions 443 are arranged at intervals in the X-axis direction.

Insulator 5 has insulating properties and is arranged between connection member 43 and plurality of power storage elements 2 . The insulator 5 covers at least a region of the connection member 43 facing the plurality of storage elements 2 . Specifically, the insulator 5 includes a body covering portion 50 that covers the surface of the connection member main body 44 facing each storage element 2 and a first covering portion that covers the surface of the first extension portion 46 facing each storage element 2. 51 and a second covering portion 52 that covers the surface of the second extending portion 47 facing inward in the Y-axis direction.

The body covering portion 50 includes a pair of beam portion covering portions 53 for insulating between the pair of beam portions 441 and the storage element 2 and a pair of ends for insulating between the pair of end connection portions 442 and the storage element 2 . and a plurality of intermediate covering portions 55 for insulating between the plurality of intermediate connecting portions 443 and the storage elements 2 . Each of the covering portions 53 , 54 , 55 has a shape corresponding to the beam portion 441 , the end connecting portion 442 and the intermediate connecting portion 443 of the connecting member 43 .

The bus bar 6 is a plate-like member having conductivity such as metal. The bus bar 6 electrically connects the external terminals 22 of the storage elements 2 or the external terminals 22 of the storage element 2 and the external input/output terminals 49 . 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 49 ). 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 direction changing portion 36 is provided between the inlet 35a and the outlet 35b of the channel 35, the direction in which the channel 35 extends from the inlet 35a to the direction changing portion 36 and the direction Since the direction in which the channel 35 extends from the converting portion 36 to the outlet 35b can be made different, it is possible to provide the power storage device 1 in which the channel 35 extending in various directions is formed.

In the power storage device 1 of the present embodiment, for example, the rib portion 3311c controls the flow velocity and the state of the fluid in the direction changing portion 360 of the flow path 350 formed in the third adjacent member 33, so that the direction changing portion Since stagnation of the fluid flow at 360 is suppressed, deterioration of cooling performance caused by this stagnation can be suppressed.

More specifically, a first path 3501 extending in the Z-axis direction from the inlet 35a to the direction changing portion 360, and a second path 3502 extending from the direction changing portion 360 to the outlet 35b in one side and the other side in the Y-axis direction. , the direction changing portion 360 is widened. Further, the third adjacent member 33 has an uneven shape, and the contact portion 3311a and the separation portion 3311b included in the first surface 3311 correspond to the contact portion 3312b and the separation portion 3312a included in the second surface 3312. (for example, the contact portion 3311a of the first surface 3311 overlaps the separation portion 3312a of the second surface 3312 when viewed from the X-axis direction, and the separation portion 3311b of the first surface 3311 is 3312b of the second surface 3312), the portion of the second surface 3312 located on the back side of the direction changing portion 360 has low heat dissipation. Furthermore, in the central region of the YZ plane of the storage element 2, in addition to the fact that heat tends to be trapped in the first place, such a central region is a portion of the second surface 3312 located on the back side of the direction changing portion 260 with low heat dissipation. Since it faces the , it is easier for heat to accumulate. On the other hand, in the power storage device 1 of the present embodiment, the stagnation of the fluid flow in the direction changing portion 360 is suppressed. Heat can be released in the direction changing portion 360 and the portion aligned in the X-axis direction).

In addition, in the power storage device 1 of the present embodiment, the inlet 35 a of the flow path 35 is located outside the contact portions 316 , 326 , 336 in the Z-axis direction, and the inlet 35 a of the flow path 35 is located outside the first body portion 311 . Since it is separated in the Z-axis direction from the outer surface of the closed portion 212 of the storage element 2 adjacent in the X-axis direction by the dimension of the extending portion 3117 in the Z-axis direction, the closed portion 212 is adjacent to the inlet 35a of the flow path 35 The creeping distance between positions across the inlet 35a of the flow path 35 of the closed portion 212 of the matching storage element 2 facing the Z-axis direction is twice as long as the dimension of the extending portion 3117 in the Z-axis direction. Insulation between these positions can be ensured.

Furthermore, in the power storage device 1 of the present embodiment, the contact portion and the facing portion (the first contact portion 316 and the first facing portion 317, the second contact portion 326 and the second facing portion 327, the third contact portion 336 and the third facing portion The portion 337) is continuous in the Y-axis direction and covers the closed portions 212 of the adjacent storage elements 2 in the X-axis direction. can further ensure

In the power storage device 1 of the present embodiment, if dust enters the flow path 35, the third sealing rib 338A arranged at the end of the first surface 3311 of the third adjacent member 33 on one side in the Z-axis direction prevents dust from passing from the other side to the one side in the Z-axis direction. As a result, it is possible to prevent dust from adhering to busbars 6 and short-circuiting between adjacent busbars 6 in the X-axis direction. Similarly, the first sealing rib 318A and the second sealing rib 328A arranged on one side of the first adjacent member 31 and the second adjacent member 32 in the Z-axis direction also cause dust to adhere to the bus bar 6 and prevent it from adhering to the X-axis direction. Short-circuiting between the matching bus bars 6 can be suppressed.

In addition, in the power storage device 1 of the present embodiment, a part of the outer surface of the rib portion 3311c on one side in the Z-axis direction has a smooth curved shape as a whole, and has a stepped portion, concave portions, convex portions, and the like. Therefore, the rib portion 3311c suppresses the stagnation of the fluid flow that tends to occur partially in the direction changing portion 360, and the fluid flowing from the other side in the Z-axis direction to the one side in the Y-axis direction and the other side.

Furthermore, the flow path 35 formed by the first adjacent member 31 and the storage element 2 adjacent to the first adjacent member 31 is formed between the first adjacent member 31 and the third adjacent member 33 adjacent to the storage element 2 via the first adjacent member 31 and the storage element 2 . Since it communicates with the flow path 35 formed by the storage element 2, the supplied fluid spreads to both sides in the Y-axis direction on the other side of the closed portion 212 of the storage element 2 in the Z-axis direction. A uniform fluid (eg, uniform pneumatic air if the cooling fluid is air) can flow through each flow path 35 . Further, the flow path 35 formed by the second adjacent member 32 and the storage element 2 is formed by the third adjacent member 33 and the storage element 2 which are adjacent to each other with the second adjacent member 32 and the storage element 2 interposed therebetween. Since it communicates with the channels 35 , a uniform fluid can similarly flow through each channel 35 .

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.

For example, the adjacent member 3 may control at least one of the flow velocity of the fluid in the direction changing portion 36 and the state of the fluid on the inlet 35 a side of the direction changing portion 36 . In addition, the third adjacent member 33 (first surface 3311) may not include the rib portion 3311c that is arranged in the direction changing portion 36 and protrudes toward the storage element 2. As shown in FIG. A wall surface 3311f that defines the conversion portion 36 may be included. The wall surface 3311f is arranged on an extension line of the first channel 3501 of the channel 350 and extends in the Y-axis direction. This wall surface 3311f is, for example, a flat surface extending in the Y-axis direction.

The wall surface 3311f may be a curved surface as shown in FIG. For example, the wall surface 3311f may have a structure in which a pair of curved surfaces 3311g that are convex on one side in the Z-axis direction are arranged in the Y-axis direction. In this case, the curvature of each curved surface 3311g may be smaller toward the outside in the Y-axis direction. The pair of curved surfaces 3311g may be continuous with each other at substantially the center of the channel 350 in the Y-axis direction. Also, instead of the curved surface 3311g, a curved surface that has an arc shape when viewed from the X-axis direction may be provided.

Also, the wall surface 3311f may be an inclined surface as shown in FIG. For example, the wall surface 3311f may be composed of a pair of inclined surfaces 3311h. The pair of inclined surfaces 3311h may be continuous with each other at substantially the center of the channel 350 in the Y-axis direction. Also, the pair of inclined surfaces 3311h may be inclined such that the part closer to the center in the Y-axis direction is located on the other side in the Z-axis direction.

Even in such a configuration, since the direction changing portion 36 is provided between the inlet 35a and the outlet 35b of the flow path 35, it is possible to provide the power storage device 1 in which the flow paths 35 extending in various directions are formed. can be done. Further, the fluid flowing from the first path 3501 to the direction changing portion 360 is arranged on the extension line of the first path 3501 and extends in the Y-axis direction on the wall surface 3311f of the third adjacent member 33 (which defines the direction changing portion 360). By colliding with the wall surface 3311f), a turbulent flow occurs around the wall surface 3311f. Therefore, by suppressing the stagnation of the fluid flow that occurs partially in the direction changing part 360, the deterioration of the cooling performance caused by this stagnation can be prevented. can be suppressed.

The flow path 35 formed in the adjacent member 3 is not limited to the configuration extending linearly in the region other than the direction changing portion 36, and may be configured to bend or meander. The width at the inlet 35 a of the channel 35 may differ from the width at the outlet 35 b of the channel 35 . In addition, on one surface of the adjacent member 3 facing the storage element 2, in at least two flow paths 35, the width of the flow path 35 at each inlet 35a is different, or the width of the flow path 35 at each outlet 35b is different. Each may be different. Also, the width of each channel 35 may be non-uniform in at least a part of the region in the longitudinal direction. Fluid can be efficiently circulated by adjusting the shape (extending direction and width) of each channel 35 provided on one surface of the adjacent member 3 facing the storage element 2 . Note that the fluid may flow from one side to the other side in the Z-axis direction, or in other directions, instead of flowing from the other side to the other side in the Z-axis direction.

Although the channel 35 has one inlet 35a and one or two outlets 35b, it may have one inlet 35a and three or more outlets 35b, or a plurality of inlets 35a. and at least one outlet 35b.

In the third adjacent member 33, each of the first surface 3311 and the second surface 3312 is formed with an uneven shape. Although the channel 35 was formed therebetween, projections are formed on the first surface 3311 and the second surface 3312 like the first adjacent member 31 and the second adjacent member 32, and the projections form the third main body. A channel 35 may be formed between the portion 331 and the storage element 2 adjacent to the third body portion 331 .

The rib portion 3311c was integrated (although continuous) with the contact portion 3311a arranged at one end of the third body portion 331 of the third adjacent member 33 in the Z-axis direction. It may be separated from the contact portion 3311a. For example, the rib portion 3311c may be spaced apart from the contact portion 3311a in the Z-axis direction. Moreover, although the rib portion 3311 c is arranged in the direction changing portion 360 , it may extend from the direction changing portion 360 to the first path 3501 . Further, the rib portion 3311c may not be arranged in the direction changing portion 360, and may be arranged only on the entrance 35a side (for example, the first path 3501) from the direction changing portion 360. Furthermore, a plurality of rib portions 3311c may be arranged. For example, the rib portions 3311c may be intermittently arranged on the direction changing portion 360 or on the entrance 35a side (for example, the first path 3501) from the direction changing portion 360. . In addition, the rib portion 3311c may be made of a material having both thermal conductivity and insulation.

In addition, the width of at least a part of the channel 35 branched by the rib portion 3311c through which the fluid flows may be narrower than the width of the portion of the channel 35 closer to the inlet 35a than the at least part of the channel 35. The flow velocity in the direction changing portion 36 may be increased, and as a result, deterioration in cooling performance due to the flow velocity may be suppressed. Furthermore, the cross-sectional area of at least a part of the flow path 35 branched by the rib portion 3311c through which the fluid flows may be narrower than the cross-sectional area of the part on the inlet 35a side of the at least part of the flow path 35, In this case, the flow velocity in the direction changing portion 36 increases, and as a result, the deterioration of the cooling performance due to the flow velocity may be suppressed. Specifically, the sum of the width and cross-sectional area of at least a portion of the flow path 35 branched by the rib portion 3311c through which the fluid flows is equal to the width and cross-sectional area of the portion of the flow path 35 closer to the inlet 35a than the at least a portion of the flow path 35. It may be narrower than that.

Adjacent member 3 includes channel 35 configured like channel 350 (first channel 3501 including inlet 35a and extending in the Z-axis direction from inlet 35a to direction changing portion 360, and a pair of second channels 3501 each including outlet 35b). A configuration having a pair of second passages 3502 extending on one side and the other side in the Y-axis direction from the direction changing portion 360 to each outlet 35b) may not be formed. Without forming the path 35, the first contact portion 316, the second contact portion 326, the third contact portion 336, the first facing portion 317, the second facing portion 327, the third facing portion 337, etc. may be provided with a configuration located on the other side of the .

The third contact portion 336 and the third opposing portion 337 extend from the other end in the Z-axis direction of the third body portion 331 of the third adjacent member 33 to both sides in the X-axis direction. It may extend from the other end of 331 in the Z-axis direction to one side or the other side in the X-axis direction (only one of the one side and the other side in the X-axis direction). Further, although a pair of third contact portions 336 are provided on each of the first surface 3311 and second surface 3312 of the third adjacent member 33, only one each is provided on each of the first surface 3311 and second surface 3312. may be provided, or a plurality of three or more may be provided. Even in such a case, if the inlet 35a of the flow path 35 is located outside the third contact portion 336 in the Z-axis direction, the inlet 35a of the flow path 35 of the closed portion 212 of the adjacent power storage element 2 Since the creepage distance between the positions of the blocking portion 212 facing the Z-axis direction across the inlet 35a of the flow path 35 is twice as long as the dimension of the extending portion 3117 in the Z-axis direction, the insulation between these positions is improved. can be secured. Furthermore, even in such a case, the third facing portion 337 is provided with a through hole 3370 forming the inlet 35a of the flow path 35, and the third contact portion 336 and the third facing portion 337 are adjacent to each other in the Y-axis direction. By covering the closed portions 212 of the elements 2 , the insulation between the closed portions 212 of the adjacent storage elements 2 can be further ensured.

When one third contact portion 336 is provided on each of the first surface 3311 and the second surface 3312 of the third adjacent member 33, one third contact portion 336 is provided with one third facing portion 337 together with this third contact portion 336. The entire area in the Y-axis direction of the closing portion 212 of the storage element 2 facing the one surface 3311 and the second surface 3312 may be covered.

Further, when the third contact portion 336 is provided on each of the first surface 3311 and the second surface 3312 of the third adjacent member 33, for example, the other end portion of the third body portion 331 in the Z-axis direction The third facing portion 337 does not have to extend from the . That is, the third adjacent member 33 does not have to have the third facing portion 337 . In this case, one third contact portion 336 may cover the entire area in the Y-axis direction of the closing portion 212 of the storage element 2 facing the first surface 3311 and the second surface 3312 .

The number of power storage elements 2 included in the power storage device 1 is not limited to plural, and may be one. In other words, the number of power storage elements 2 included in power storage device 1 may be at least one.

DESCRIPTION OF SYMBOLS 1... Electricity storage apparatus 2... Electricity storage element 20... Electrode body 21... Case 22... External terminal 211... Case main body 212... Closing part 213... Body part 214... Long wall part 215... Short wall part , 216... Lid plate 217... Gas discharge valve 3... Adjacent member 31... First adjoining member (adjacent member) 311... First body portion 312, 312A, 312B... First restricting portion 315... Bolt , 316... First contact part, 3111... Surface, 3112... First protrusion, 3113, 3114... Corner part, 3115... Spacing area, 3116... Overlapping part, 3117... Extension part, 3160... Main body area, 3161... Contact Regions 3162, 3170... Through hole 317... First opposing portion 318, 318A, 318B... First sealing rib 32... Second adjacent member (adjacent member) 321... Second body portion 322, 322A, 322B... Second restricting portion 326 Second contact portion Surface 3211, 3212 Second protrusion 3213 Spacing region 3214, 3215 Corner 3216 Overlapping portion 3217 Extension portion 3260 Body region , 3261... Contact region 327... Second opposing portion 328, 328A, 328B... Second seal rib 33... Third adjacent member (adjacent member) 331... Third body part 3311... First surface 3312... Third Two faces, 3311a, 3312b... Contact portion 3311b, 3312a... Spaced portion 3311c... Rib portion 3311d... Base portion 3311e... Extension part 3311f... Wall surface 3311g... Curved surface 3311h... Inclined surface 3313, 3314 Corner portion 3316 Overlapping portion 3317 Extension portion 332, 332A, 332B Third restricting portion 336 Third contact portion 337 Third opposing portion 3360 Body region 3361 Contact region 3362, 3370... Through holes 338, 338A, 338B... Third seal ribs 35, 350, 351, 352... Flow paths 35a... Openings, inlets 35b... Openings, outlets 3501, 3511, 3521... First paths, 3502...Second path, 3512,...Third path, 3522...Fourth path, 36, 360, 361, 362...Direction change part 4...Holding member 40...Terminal member 41...Terminal member main body 42...Extension Setting part 43... Connection member 44... Connection member body 441... Beam part 442... End connection part 443... Intermediate connection part 45... Fixed member 46... First extension part 47... Second extension Setting part 48... Connected part 49... External input/output terminal 5... Insulator 50... Main body covering part 51... First covering part 52... Second covering part 53... Beam part covering Part 54 End covering part 55 Intermediate covering part 6 Bus bar 102 Battery cell 103 Spacer 110 Groove 120 Cooling gap

Claims (10)

a storage element;
an adjoining member that is adjacent to the power storage element in the first direction so as to form a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; prepared,
The flow path has an inlet and an outlet, and has a direction changing portion located midway between the inlet and the outlet and making the direction extending from the inlet and the direction extending to the outlet different,
The adjacent member has a first surface that is a surface on one side in the first direction and a second surface that is a surface on the other side in the first direction,
The flow path is formed by forming an uneven shape on each of the first surface and the second surface,
In the first direction, the convex portion of the first surface overlaps the concave portion of the second surface, the concave portion of the first surface overlaps the convex portion of the second surface, and
The power storage device, wherein the direction changing portion is arranged in a concave portion of the first surface. a plurality of power storage elements arranged in a first direction;
an adjoining member that is adjacent to the power storage element in the first direction and forms a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; with
the flow path has an inlet and an outlet, a direction changing portion positioned midway between the inlet and the outlet and configured to make a direction extending from the inlet different from a direction extending to the outlet; a first path extending from the entrance to the turning section in a second direction perpendicular to the first direction; and a pair of second paths each including the exit, wherein the turning a pair of second paths extending from the part to each outlet in one side and the other side in a third direction orthogonal to both the first direction and a second direction orthogonal to the first direction;
The adjacent members include a first adjacent member arranged between the power storage elements at a central position in the first direction, and the first adjacent member in the first direction and the power storage element at the end in the first direction. a third adjacent member disposed between two adjacent energy storage elements between
The width in the third direction of the first path of the flow path formed between the first adjacent member and the storage element by the first adjacent member being adjacent to the storage element is so that the width of the flow channel formed between the energy storage element and the first path in the third direction is different, or the first adjacent member is adjacent to the energy storage element, so that the first adjacent member is adjacent to the energy storage element. The width in the second direction of the second path of the flow path to be formed is the second width of the second path of the flow path formed between the third adjacent member and the storage element by adjoining the storage element. A power storage device having a width different in a direction. a plurality of power storage elements arranged in a first direction;
an adjoining member that is adjacent to the power storage element in the first direction and forms a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; with
the flow path has an inlet and an outlet, a direction changing portion positioned midway between the inlet and the outlet and configured to make a direction extending from the inlet different from a direction extending to the outlet; a first path extending from the entrance to the turning section in a second direction perpendicular to the first direction; and a pair of second paths each including the exit, wherein the turning a pair of second paths extending from the part to each outlet in one side and the other side in a third direction orthogonal to both the first direction and a second direction orthogonal to the first direction;
The adjacent member includes a second adjacent member adjacent to the energy storage element outside the energy storage element at the end in the first direction, and two adjacent members at a position other than between the energy storage elements at the center position in the first direction. a third adjacent member disposed between the two power storage elements,
The width in the third direction of the first path of the flow path formed between the second adjacent member and the storage element by the second adjacent member being adjacent to the storage element is so that the width in the third direction of the first path of the flow path formed between the energy storage element is different, or the second adjacent member is adjacent to the energy storage element so that it is between the energy storage element The width in the second direction of the second path of the flow path to be formed is the second width of the second path of the flow path formed between the third adjacent member and the storage element by adjoining the storage element. A power storage device having a width different in a direction. The adjacent member controls at least one of the flow velocity of the fluid in the direction changing portion and the state of the fluid in the direction changing portion or on the inlet side of the direction changing portion. The power storage device according to any one of items 1 to 3. the adjacent member includes a rib portion arranged in the direction changing portion and protruding toward the power storage element,
the rib portion extends between the pair of second passages so as to branch the flow of the fluid entering the first passage from the inlet into the pair of second passages;
Claim 2 or Claim 3, wherein the width of at least a portion of the flow path branched by the rib portion through which the fluid flows is narrower than the width of a portion on the inlet side of the at least the portion of the flow path. The electrical storage device described. The flow path includes a first path including the inlet, the first path extending from the inlet to the direction changing portion in a second direction orthogonal to the first direction, and a pair of second paths each including the outlet. a pair of second paths extending from the direction changing portion to each outlet in one side and the other side in a third direction orthogonal to both the first direction and the second direction;
The adjacent member has a wall surface that defines the direction changing portion, and has a wall surface that is arranged on an extension line of the first path and extends in the third direction. The power storage device according to . A plurality of the storage elements are arranged in the first direction,
each of the plurality of power storage elements has an outer surface facing in a second direction orthogonal to the first direction;
The adjacent member is disposed between adjacent energy storage elements among the plurality of energy storage elements, and is a contact portion that contacts the outer surface of at least one of the adjacent energy storage elements from the outside in the second direction. with
The power storage device according to any one of claims 1 to 6, wherein an inlet of said flow path is located outside said contact portion in said second direction. The adjacent member is continuous with the contact portion in a third direction orthogonal to both the first direction and a second direction orthogonal to the first direction, and is separated from the outer surfaces of the adjacent power storage elements. having facing portions facing each other;
The opposing portion is provided with a through-hole constituting an inlet of the flow path,
8. The power storage device according to claim 7, wherein said contact portion and said facing portion cover said outer surfaces of said adjacent power storage elements in said third direction. a plurality of power storage elements arranged in a first direction;
an adjoining member that is adjacent to the power storage element in the first direction and forms a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; with
The flow path has an inlet and an outlet, and has a direction changing portion located midway between the inlet and the outlet and making the direction extending from the inlet and the direction extending to the outlet different,
each of the plurality of power storage elements has an outer surface facing in a second direction orthogonal to the first direction;
The adjacent member is disposed between adjacent energy storage elements among the plurality of energy storage elements, and contacts the outer surface of at least one of the adjacent energy storage elements from the outside in the second direction. and the contact portion are continuous in a third direction orthogonal to both the first direction and a second direction orthogonal to the first direction, and are opposed to the outer surfaces of the adjacent power storage elements while being separated from each other. and a facing portion,
the inlet of the flow path is located outside the contact portion in the second direction;
The opposing portion is provided with a through-hole constituting an inlet of the flow path,
The electric storage device, wherein the contact portion and the facing portion cover the outer surfaces of the adjacent electric storage elements in the third direction. a plurality of power storage elements arranged in a first direction;
an adjoining member that is adjacent to the power storage element in the first direction and forms a flow path between the power storage element and the power storage element along an imaginary plane perpendicular to the first direction and through which a temperature-adjusting fluid can flow; with
each of the plurality of power storage elements has an outer surface facing outward in a second direction orthogonal to the first direction;
The flow path has an inlet and an outlet, and has a direction changing portion located midway between the inlet and the outlet and making the direction extending from the inlet and the direction extending to the outlet different,
The adjacent member is disposed between adjacent energy storage elements among the plurality of energy storage elements, and is a contact portion that contacts the outer surface of at least one of the adjacent energy storage elements from the outside in the second direction. and an extending portion projecting outward in the second direction from the contact portion,
The power storage device, wherein an inlet of the flow path opens in the second direction, and is positioned outside the contact portion in the second direction by being provided in the extension portion.

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