WO2016171005A1

WO2016171005A1 - Electrical-storage-device holder, and electrical-storage-device module

Info

Publication number: WO2016171005A1
Application number: PCT/JP2016/061519
Authority: WO
Inventors: 祐貴中條; 加藤　崇行; 浩生植田
Original assignee: 株式会社豊田自動織機
Priority date: 2015-04-24
Filing date: 2016-04-08
Publication date: 2016-10-27
Also published as: JP2016207534A; JP6657590B2

Abstract

This electrical-storage-device holder for holding an electrical storage device is provided with: a bottom wall part which faces the bottom surface of the electrical storage device; a pair of side wall parts which face the two side surfaces of the electrical storage device; and a rear wall part which faces the rear surface of the electrical storage device. The rear wall part is provided with a plurality of ribs which extend in the direction in which the pair of side wall parts face each other, and demarcate first air flow paths through which air flows. The bottom wall part is provided with a plurality of protruded sections on which the electrical storage device is placed, and which demarcate a second air flow path through which the air flows.

Description

Power storage device holder and power storage device module

One aspect of the present invention relates to a power storage device holder and a power storage device module.

As a conventional power storage device module, a secondary battery module including a plurality of secondary batteries and a plurality of cell holders respectively holding the plurality of secondary batteries is known (see, for example, Patent Document 1). The cell holder is configured by integrally forming a heat conductive rubber layer on one surface of a metal plate member. A surface of the thermally conductive rubber layer that comes into contact with the secondary battery is provided with a cooling medium flow path through which a cooling medium such as air for cooling the secondary battery that generates heat due to overcharging or the like flows.

JP 2014-10939 A

In the cell holder (power storage device holder) as described above, it is required to improve the heat dissipation of the battery (power storage device).

An object of one aspect of the present invention is to provide a power storage device holder and a power storage device module that can improve heat dissipation of the power storage device.

A power storage device holder according to one aspect of the present invention is a power storage device holder that holds a power storage device, and includes a bottom wall portion that faces the bottom surface of the power storage device, and a pair of side wall portions that face both side surfaces of the power storage device. And a back wall portion facing the back surface of the power storage device, the back wall portion extending in the facing direction of the pair of side wall portions and having a plurality of ribs defining a first air flow path through which air flows. The bottom wall portion has a plurality of protruding portions that define a second air flow path on which the power storage device is placed and air flows.

In this power storage device holder, the back and bottom surfaces of the power storage device are cooled by flowing air through the first air flow path and the second air flow path. That is, not only the back surface of the power storage device is cooled like the conventional power storage device holder, but also the bottom surface of the power storage device is cooled. Thereby, the heat dissipation of an electrical storage apparatus can be improved.

Further, the protruding portions may be provided at both ends of the bottom wall portion, and the second air flow path may be disposed between the protruding portions provided at both ends of the bottom wall portion. Thereby, the heat dissipation of the center part of the bottom face of the power storage device that easily rises in temperature due to overcharging of the power storage device can be improved.

Further, the second air flow path may extend in a direction orthogonal to the extending direction of the first air flow path. Thereby, the heat dissipation of the power storage device can be improved with a simple configuration.

A plurality of second air flow paths are arranged along the extending direction of the first air flow path, and the width of the second air flow path is from one side to the other in the extending direction of the first air flow path. It may become wider toward the side. When air flows from one side in the extending direction of the first air flow path toward the other side, the temperature of the air can rise from one side in the extending direction toward the other side. However, in this case, since the width of the second air flow path becomes wider from one side of the extending direction of the first air flow path to the other side, the flow rate of the air flowing through each second air flow path is It increases from one side in the extending direction of the first air channel toward the other side. As a result, variation in heat dissipation of the power storage device in the extending direction can be suppressed.

Further, the first air channel and the second air channel may be communicated with each other. Thereby, since air flows through both the first air flow path and the second air flow path, the air stays in the flow path for a long time. As a result, air can be sufficiently utilized for cooling the power storage device.

Further, the second air flow path may extend in the extending direction of the first air flow path. Thereby, the heat dissipation of the power storage device can be improved with a simple configuration.

Moreover, the second air flow path may have a wave shape. A region where the wavy second air flow path and the bottom surface of the power storage device face is wider than a region where the straight second air flow path and the bottom surface of the power storage device face. For this reason, the heat dissipation of the power storage device can be further improved.

A power storage device module according to one aspect of the present invention includes a plurality of power storage devices and the plurality of power storage device holders that respectively hold the plurality of power storage devices.

Since the power storage device module includes the power storage device holder, the heat dissipation of the power storage device can be improved.

According to one aspect of the present invention, the heat dissipation of the power storage device can be improved.

It is the schematic which shows the battery module as an electrical storage apparatus module which concerns on 1st Embodiment. It is a front view which shows the battery and cell holder with which the battery module shown in FIG. 1 was equipped. It is a perspective view which shows the cell holder shown in FIG. It is a side view which shows the cell holder shown in FIG. It is a perspective view which shows the cell holder with which the battery module as an electrical storage apparatus module which concerns on 2nd Embodiment was equipped. It is a perspective view which shows the modification of the cell holder shown in FIG. It is a perspective view which shows the cell holder with which the battery module as an electrical storage apparatus module which concerns on 3rd Embodiment was equipped. It is a perspective view which shows the cell holder with which the battery module as an electrical storage apparatus module which concerns on 4th Embodiment was equipped. It is a perspective view which shows the modification of the cell holder shown in FIG.

Hereinafter, embodiments of one aspect of the present invention will be described in detail with reference to the drawings. In the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.
[First Embodiment]

FIG. 1 is a schematic diagram showing a battery module as an embodiment of a power storage device module. As shown in the figure, the battery module (power storage device module) 1 includes an array body 2, end plates (constraint members) 3 and 3 that apply a restraining load to the array body 2, and the array body 2 and the end. And an elastic body 4 interposed between the plate 3 and the plate 3.

The array body 2 includes a plurality (here, seven bodies) of batteries (power storage devices) 10 and a plurality (here, seven bodies) of cell holders (power storage device holders) 5 that respectively hold the batteries 10. .

The battery 10 is, for example, a lithium ion secondary battery. As shown in FIG. 2, the battery 10 includes a hollow case 11 having a substantially rectangular parallelepiped shape, for example, and an electrode assembly (not shown) housed in the case 11. The case 11 is made of a metal such as aluminum. The case 11 includes a pair of front surfaces 12a and a rear surface 12b that face each other in the arrangement direction of the array bodies 2 (through direction in FIG. 2), and a pair of top surfaces that face each other in the short side direction (the vertical direction in FIG. 2). 13a and a bottom surface 13b, and a pair of

side surfaces

14a and 14b facing in the longitudinal direction of the back surface 12b (left and right direction in FIG. 2).

In the case 11, for example, an organic solvent-based or non-aqueous electrolyte is injected. On the top surface 13 a of the case 11, the positive electrode terminal 15 and the negative electrode terminal 16 are disposed so as to be separated from each other. The electrode assembly includes, for example, a positive electrode, a negative electrode, and a bag-like separator disposed between the positive electrode and the negative electrode. In the electrode assembly, the positive electrode and the negative electrode are alternately stacked along the arrangement direction of the array 2 via the separator in a state where the positive electrode is accommodated in the separator.

The cell holder 5 is integrally formed of a resin material such as polypropylene. The cell holder 5 is located around the case 11 as shown in FIG.

The end plate 3 applies a restraining load to the array body 2 in the array direction of the batteries 10. The end plate 3 is a metal plate-like member, for example. As shown in FIG. 1, the end plate 3 has an area larger than the area when the battery 10 is viewed from the arrangement direction, for example. The end plates 3 are respectively disposed at both ends of the array body 2 and the elastic body 4 in the array direction in a state where the outer edge portion projects outward from the battery 10. A plurality of bolts 6 are inserted through outer edge portions of the

end plates

3 and 3. The nut 7 is screwed onto the tip of each bolt 6 from the outside of the end plate 3, whereby the battery 10 and the elastic body 4 are sandwiched by the

end plates

3, 3 to form a unit, and the

end plates

3, 3 Restraint load is added.

The elastic body 4 is a member used for the purpose of preventing the battery 10 and the end plate 3 from being damaged by a restraining load when the battery 10 is expanded. As shown in FIG. 1, the elastic body 4 is formed in a rectangular plate shape by, for example, urethane rubber sponge, and is disposed between the battery 10 on one end side in the arrangement direction and the end plate 3. The thickness of the elastic body 4 is equal to or greater than the thickness of the end plate 3. Examples of the material for forming the elastic body 4 include ethylene propylene diene rubber (EPDM), chloroprene rubber, and silicon rubber.

Subsequently, the cell holder 5 will be described in more detail.

As shown in FIG. 3, the cell holder 5 is opposed to the back wall portion 20 facing the back surface 12 b of the battery 10, the bottom wall portion 30 facing the bottom surface 13 b of the case 11, and both side surfaces 14 a and 14 b of the battery 10. A pair of

side wall portions

40, 40 and a top wall portion 50 facing the top surface 13 a of the case 11.

The back wall portion 20 includes a rectangular plate-like back plate 21, a plurality of (here, nine) first ribs (ribs) 22 having a rectangular parallelepiped shape (cross-sectional rectangular shape) extending in the longitudinal direction of the back plate 21, have. The length of the first rib 22 in the extending direction is substantially the same as the length of the back plate 21 in the longitudinal direction. Each first rib 22 is disposed on one surface 21 a of the back plate 21. The first ribs 22 are arranged substantially in parallel with the width of the first ribs 22 along the short direction of the back plate 21. The distance between one first rib 22 (lower first rib 22 in FIG. 3) where the arrangement end is located and one end portion (lower end portion in FIG. 3) in the short direction of the back plate 21 is adjacent. It is wider than the interval between the matching first ribs 22.

The bottom wall portion 30 includes a rectangular plate-shaped concave portion 31 in which both end portions in the longitudinal direction are bent, and a pair of rectangular parallelepiped-shaped

support portions

32 and 32 that support both end portions of the concave portion 31. The support portion 32 includes a protruding portion 32 a that protrudes toward the opposite side (first rib 22 side) of the recessed portion 31 and a leg portion 32 b that protrudes toward the recessed direction of the recessed portion 31. That is, the protruding portion 32 a and the leg portion 32 b are provided at both ends of the bottom wall portion 30. The front end surface of the protruding portion 32a is a mounting surface 32c on which the bottom surface 13b of the case 11 is mounted. The leg portion 32 b is provided with a through hole 32 d extending in the short direction of the bottom wall portion 30. The bolt 6 described above is inserted into the through hole 32d.

The bottom wall portion 30 is disposed at one end portion of the back plate 21 in the short direction (the lower end portion in FIG. 3). The short side direction of the bottom wall portion 30 is directed in a direction orthogonal to the surface direction of the one surface 21 a of the back plate 21. The bottom wall portion 30 is connected to one end portion in the short direction of the back plate 21 by one end portion in the short direction of the bottom wall portion 30.

The side wall portion 40 has a rectangular plate shape. The length of the side wall portion 40 in the short direction is substantially the same as the length of the bottom wall portion 30 in the short direction. The side wall 40 is formed with an opening 41 in which one end in the short direction of the side wall 40 is cut out in a rectangular shape. The opening 41 extends along the longitudinal direction of the side wall 40.

Each

side wall

40, 40 is disposed at each end of the back plate 21 in the longitudinal direction. The short side direction of the side wall portion 40 is directed in a direction orthogonal to the surface direction of the one surface 21 a of the back plate 21. Each

side wall

40, 40 is connected to each end in the longitudinal direction of the back plate 21 by one end in the short direction of each

side wall

40, 40. Each

side wall part

40, 40 is connected to each

support part

32, 32 by one end part (lower end part in FIG. 3) of each

side wall part

40, 40 in the longitudinal direction. The

openings

41 and 41 are opposed to each other in the longitudinal direction of the back plate 21. The edge of the opening 41 in the extending direction is located in the vicinity of the first rib 22 located at the arrangement end.

The top wall portion 50 has a pair of terminal

accommodating portions

51 and 51 and a pair of

column portions

52 and 52. The terminal accommodating portion 51 has a rectangular flat plate shape. The terminal accommodating portion 51 is formed with a notched portion 51a in which one end in the short direction of the terminal accommodating portion 51 is notched in a semicircular shape. The positive electrode terminal 15 and the negative electrode terminal 16 of the battery 10 are located in the notch 51a. The column part 52 has a columnar shape. The column portion 52 is disposed at one end portion (inner end portion) in the longitudinal direction of the terminal accommodating portion 51. The column part 52 is provided with a through hole 52 a extending in the short direction of the terminal accommodating part 51. The above-described bolt 6 is inserted into the through hole 52a.

The top wall 50 is disposed at the other end of the back plate 21 in the lateral direction (the upper end in FIG. 3). The short side direction of the terminal accommodating portion 51 is orthogonal to the surface direction of the one surface 21 a of the back plate 21. The top wall portion 50 is connected to the other end portion in the short direction of the back plate 21 (the upper end portion in FIG. 3) by one end portion of the top wall portion 50 in the short direction of the terminal accommodating portion 51. The other end portion in the longitudinal direction of each terminal accommodating

portion

51, 51 is connected to the other end portion in the longitudinal direction of each side wall portion 40, 40 (the upper end portion in FIG. 3).

The battery 10 is fitted into the cell holder 5. The back surface 12b of the case 11 is in contact with the tip of the first rib 22 as shown in FIG. For this reason, the first air flow path R <b> 1 is formed by a space defined by the back surface 12 b of the case 11, the first rib 22 of the back wall portion 20, and the back plate 21. The first air flow path R1 extends in the facing direction of the pair of

side wall portions

40,40. Therefore, the air flowing in from one opening 41 (left opening 41 in FIG. 3) passes through each first air flow path R1 and from the other opening 41 (right opening 41 in FIG. 3). leak. The first air flow path R1 is used as a flow path through which cooled air or the like flows, for example, and contributes to cooling of the battery 10.

On the other hand, between each protrusion part 32a of the bottom wall part 30, as FIG. 2 shows, 2nd air flow path R2 is arrange | positioned. More specifically, the bottom surface 13b of the case 11 is placed on the placement surface 32c of the protruding portion 32a. For this reason, the second air flow path R2 is formed by the space defined by the bottom surface 13b of the case 11, the concave portion 31 of the bottom wall portion 30, and the protruding

portions

32a and 32a. The second air flow path R2 is used as a flow path through which cooled air or the like flows, for example, and contributes to cooling of the battery 10. Air flows into one end side of the second air flow path R2 (the back side in the paper surface direction in FIG. 2) through each opening 41. The air that has passed through the second air flow path R2 flows out from the other end side of the second air flow path R2 (the front side in the drawing in FIG. 2).

As described above, in this embodiment, the back surface 12b and the bottom surface 13b of the battery 10 are cooled by flowing air through the first air flow path R1 and the second air flow path R2. That is, not only the back surface 12b of the battery 10 is cooled like a conventional cell holder, but also the bottom surface 13b of the battery 10 is cooled. Thereby, the heat dissipation of the battery 10 can be improved.

In the present embodiment, the protruding portions 32 a are provided at both ends of the bottom wall portion 30. The second air flow path R2 is disposed between the protruding portions 32a. Thereby, the heat dissipation of the center part of the bottom face 13b of the battery 10 which is likely to rise in temperature due to overcharge of the battery 10 or the like can be improved.
[Second Embodiment]

This embodiment is different from the first embodiment in the configuration of the bottom wall portion of the cell holder 5.

The cell holder 5 includes a bottom wall portion 230 as shown in FIG. The bottom wall 230 has a rectangular plate-like bottom plate 231 and a plurality (19 in this case) of second ribs (projecting portions) 232. The second rib 232 has a rectangular parallelepiped shape (a rectangular cross section) extending in the short direction of the bottom wall portion 230. The second rib 232 is disposed on the one surface 231 a of the bottom plate 231. Each of the second ribs 232 is arranged substantially in parallel along the extending direction of the first air flow path R <b> 1 at intervals similar to the width of the second ribs 232. For this reason, a plurality of (here, 18) second air flow paths R <b> 2 are formed by the space defined by the bottom surface 13 b of the case 11, the bottom plate 231 of the bottom wall portion 230, and the second ribs 232. Each second air flow path R2 extends in a direction orthogonal to the extending direction of the first air flow path R1. The air that has flowed in from the openings 41 flows into one end side (the back side in the drawing in FIG. 2) of the second air flow path R2. The air that has passed through the second air flow path R2 flows out from the other end side of the second air flow path R2 (the front side in the drawing in FIG. 2). Thus, in this embodiment, the heat dissipation of the battery 10 can be improved with a simple configuration. Note that a plurality of the second air flow paths R2 do not need to be arranged, and at least one or more may be arranged.

Moreover, the width | variety of 2nd air flow path R2 may become large as it goes to the other side from the one side of the extension direction of 1st air flow path R1, as FIG. 6 shows. When air flows from one side in the extending direction of the first air flow path R1 to the other side through the

openings

41 and 41, the temperature of the air from one side to the other side in the extending direction is Can rise. However, in this case, the width of the second air flow path R2 becomes wider from one side of the extending direction of the first air flow path R1 toward the other side. The flow rate of the flowing air increases from one side in the extending direction of the first air flow path R1 toward the other side. As a result, variation in heat dissipation of the battery 10 in the extending direction can be suppressed.
[Third Embodiment]

This embodiment is different from the first embodiment in the configuration of the back wall portion and the bottom wall portion of the cell holder 5.

The cell holder 5 includes a back wall portion 320 and a bottom wall portion 330, as shown in FIG. The back wall portion 320 includes a rectangular plate-like back plate 321, a plurality (here, nine) of first ribs 322, and a plurality (here, eight) of third ribs 323. The first rib 322 has a rectangular parallelepiped shape (a rectangular cross section) extending in the longitudinal direction of the back plate 321. The lengths of the first ribs 322 in the extending direction are different from each other. Each first rib 322 is disposed on one surface 321 a of the back plate 321. Each first rib 322 is arranged so that the first rib 322 having a long length is positioned from the bottom wall portion 330 side toward the top wall portion 50 side. The first ribs 322 are arranged substantially in parallel at intervals similar to the width of the first ribs 322. One end of each first rib 322 is aligned with one end in the longitudinal direction of the back plate 321 (the left end in FIG. 7). Thus, a plurality of first air flow paths R1 having different lengths are formed by the space defined by the back surface 12b of the case 11, the first rib 322 of the back wall 320, and the back plate 321. The first air flow path R1 extends in the facing direction of the pair of

side wall portions

40,40.

Each third rib 323 has a rectangular parallelepiped shape (a rectangular cross section) extending in the short direction of the back plate 321. The lengths of the third ribs 323 in the extending direction are different from each other. Each third rib 323 is disposed on one surface 321 a of the back plate 321. Each of the third ribs 323 is positioned such that the longer third rib 323 is positioned from the side of the one side wall 40 (the left side in FIG. 7) toward the other side wall 40 (the right side in FIG. 7). Is arranged. The third ribs 323 are arranged substantially in parallel at intervals wider than the width of the third ribs 323. One end of each third rib 323 is aligned with one end of the back plate 321 in the lateral direction (the lower end in FIG. 7). Thus, a plurality of third air flow paths R3 having different lengths are formed by the space defined by the back surface 12b of the case 11, the third rib 323 of the back wall 320, and the back plate 321.

The other end of each first rib 322 and the other end of each third rib 323 are connected. That is, the first air flow path R1 and the third air flow path R3 are in communication. Thereby, a plurality of L-shaped air flow paths are formed on the one surface 321a of the back plate 321 in plan view.

The bottom wall portion 330 includes a rectangular plate-like bottom plate 331 and a plurality of (here, eight) second ribs (protruding portions) 332. The second rib 332 has a rectangular parallelepiped shape (a rectangular cross section) extending in the short direction of the bottom wall portion 330. The second rib 332 is disposed on the one surface 331 a of the bottom plate 331. The second ribs 332 are arranged substantially in parallel along the extending direction of the first air flow path R1 at an interval wider than the width of the second ribs 332. For this reason, a plurality of second air flow paths R <b> 2 are formed by the space defined by the bottom surface 13 b of the case 11, the bottom plate 331 of the bottom wall portion 330, and the second ribs 332. Each second air flow path R2 extends in a direction orthogonal to the extending direction of the first air flow path R1.

One end of each second rib 232 (end on the back side in the drawing in FIG. 7) is connected to one end of each third rib 323 (lower end in FIG. 7). That is, the second air flow path R2 and the third air flow path R3 are in communication. Thereby, 1st air flow path R1 and 2nd air flow path R2 are connected via 3rd air flow path R3.

In this embodiment, since air flows through the flow path from the first air flow path R1 to the second air flow path R2, the air stays in the air flow path for a long time. As a result, air can be fully utilized for cooling the battery 10.
[Fourth Embodiment]

This embodiment is different from the first embodiment in the configuration of the bottom wall portion and the side wall portion of the cell holder 5.

As shown in FIG. 8, the cell holder 5 includes a bottom wall portion 430 and a pair of

side wall portions

440 and 440. The bottom wall part 430 has a rectangular plate-like bottom plate 431. In the bottom plate 431, one second air flow path R2 extending in the extending direction of the first air flow path R1 is formed.

The side wall portion 440 has a rectangular plate shape. An opening 441 is formed in the side wall 440. The opening 441 includes a first opening portion 441a and a second opening portion 441b. The first opening portion 441a is formed by cutting out one end of the side wall portion 440 in the lateral direction into a rectangular shape. The first opening portion 441 a extends along the longitudinal direction of the side wall portion 440. The second opening portion 441b extends from one end portion (end portion on the bottom wall portion 430 side) in the longitudinal direction of the first opening portion 441a toward the other end portion in the short side direction of the side wall portion 440. The second air flow path R2 is located in a region surrounded by the peripheral edge of the second opening portion 441b when viewed from the opposing direction of the

side wall portions

440 and 440. Therefore, the air flowing in from one second opening portion 441b passes through the second air flow path R2 and flows out from the other second opening portion 441b. Thus, in this embodiment, the heat dissipation of the battery 10 can be improved with a simple configuration.

The present invention is not limited to the above embodiment.

In the said embodiment, although 1st air flow path R1, 2nd air flow path R2, and 3rd air flow path R3 are exhibiting linear form, each air flow path R1, R2, R3 is shown in FIG. Like the 2nd air flow path R2 shown, you may exhibit a wave shape, for example. In this case, a region where the wavy second air flow path R2 and the bottom surface 13b of the battery 10 face is wider than a region where the straight second air flow path R2 and the bottom surface 13b of the battery 10 face. For this reason, the heat dissipation of the battery 10 can be further improved. Further, the width of each air flow path R1, R2, R3, the width of the

first ribs

22, 322, the width of the

second ribs

232, 332, and the width of the third rib 323 may be appropriately changed.

In the above embodiment, the air flowing in from one opening 41 (the left opening 41 in FIG. 3) passes through each first air flow path R1 and the other opening 41 (the right opening in FIG. 3). 41), the air flow direction may be reversed. That is, the air that flows in from the other opening 41 may flow out from the one opening 41. Further, the arrangement of the air flow paths R1, R2, R3, the

first ribs

22, 322, the

second ribs

232, 332, and the third ribs 323 may be appropriately changed according to the direction in which the air flows.

In the above embodiment, the

end plates

3 and 3 are fastened to each other with the bolt 6 and the nut 7 and a restraining load is applied to the array body 2 and the elastic body 4. Etc.), and both ends of the restraint band may be fastened to the

end plates

3 and 3 with bolts or the like, respectively, and a restraint load may be applied to the array body 2 and the elastic body 4. In addition, the power storage device according to the above embodiment may be applied to a power storage device module that does not apply a restraining load to the array 2.

In the above embodiment, the power storage device is a secondary battery such as a lithium ion secondary battery. However, the present invention is not particularly limited to such a secondary battery, and for example, an electrical storage such as an electric double layer capacitor or a lithium ion capacitor. The present invention can also be applied to a power storage device module including the device.

放熱 The heat dissipation of the power storage device is improved.

DESCRIPTION OF SYMBOLS 1 ... Battery module (electric storage apparatus module), 5 ... Cell holder (electric storage apparatus holder), 10 ... Battery (electric storage apparatus), 20, 320 ... Back wall part, 30, 330, 430 ... Bottom wall part, 40, 440 ... Side wall Part, 22,322 ... 1st rib (rib), 32a ... projecting part, 232, 332 ... 2nd rib (projecting part), R1 ... 1st air flow path, R2 ... 2nd air flow path.

Claims

A power storage device holder for holding a power storage device,
A bottom wall portion facing the bottom surface of the power storage device;
A pair of side wall portions facing both side surfaces of the power storage device;
A back wall facing the back of the power storage device;
The back wall portion has a plurality of ribs that extend in a facing direction of the pair of side wall portions and define a first air flow path through which air flows.
The bottom wall portion is a power storage device holder having a plurality of protruding portions that define a second air flow path on which the power storage device is placed and the air flows.
The protruding portions are provided at both ends of the bottom wall portion,
The power storage device holder according to claim 1, wherein the second air flow path is disposed between the protruding portions provided at both end portions of the bottom wall portion.
The power storage device holder according to claim 1, wherein the second air flow path extends in a direction orthogonal to an extending direction of the first air flow path.
A plurality of the second air flow paths are arranged along the extending direction of the first air flow path,
The power storage device holder according to claim 3, wherein a width of the second air flow path is increased from one side in the extending direction of the first air flow path toward the other side.
The power storage device holder according to claim 3 or 4, wherein the first air channel and the second air channel communicate with each other.
The power storage device holder according to claim 1, wherein the second air flow path extends in an extending direction of the first air flow path.
The power storage device holder according to any one of claims 1 to 6, wherein the second air flow path has a wave shape.
A plurality of power storage devices;
A power storage device module comprising: the plurality of power storage device holders according to any one of claims 1 to 7 each holding the plurality of power storage devices.