Power storage device

Abstract

To provide a power storage device that can reduce accumulation of debris and reduce heat transfer between power storage stacks adjacent to each other.SOLUTION: A power storage device 10 includes a housing case 120 having an opening 220h, a power storage module 100, a frame member covering the opening 220h, and a cooler 50 for cooling the power storage module 100. The power storage module 100 includes power storage stacks 101 disposed adjacent to each other. The frame member is disposed between the power storage stacks 101 disposed adjacent to each other, a smoke exhaust path communicating with the opening 220h is positioned inside the frame member, and the frame member is provided with an inlet hole for introducing gas discharged from any of the power storage stacks 101 disposed adjacent to each other into the smoke exhaust path. The cooler 50 is provided with a through hole 50h at a position corresponding to the opening 220h.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to an electric storage device mounted on a vehicle. [Background technology]

[0002] As a conventional electricity storage device, International Publication No. 2020 / 134054 (Patent Document 1) discloses a structure in which partition members (frame members) for partitioning areas in which multiple electricity storage stacks are arranged are made of hollow members, and the hollow portions of the hollow members are used as smoke exhaust paths. The hollow members are provided with multiple inlets for introducing gases exhausted from the electricity storage device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 134054 Summary of the Invention [Problem to be solved by the invention]

[0004] When high-temperature gas flows through the exhaust gas path, the frame member in which the exhaust gas path is installed becomes hot. If no measures are taken, heat may be transferred from the frame member to the adjacent battery stack, causing a chain reaction of heat generation in the battery stack. In addition, because the outlet of the exhaust gas path is located on the front wall or rear wall of the housing case, the path length to the outlet is long, and debris may accumulate in the exhaust gas path.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide an energy storage device that can suppress the transfer of heat between adjacent energy storage stacks while suppressing the accumulation of debris. [Means for solving the problem]

[0006] An energy storage device according to the present disclosure includes a housing case having an opening, an energy storage module disposed within the housing case, a frame member provided within the housing case so as to cover the opening, and a cooler that cools the energy storage module. The energy storage module includes energy storage stacks disposed adjacent to each other. The frame member is disposed between the adjacent energy storage stacks. A smoke exhaust path communicating with the opening is located inside the frame member. The frame member is provided with an inlet for introducing gas discharged from any of the adjacent energy storage stacks into the smoke exhaust path. The cooler is provided with a through-hole at a position corresponding to the opening.

[0007] According to the above configuration, gas introduced from the energy storage device into the gas exhaust path located inside the frame member can be directly exhausted to the outside of the housing case through the opening in the bottom and the through-hole in the cooler. This shortens the travel distance of the gas and prevents the frame member from becoming too hot. As a result, heat transfer from the frame member to the energy storage stack adjacent to the frame member on the opposite side of the heated energy storage stack can be prevented, preventing thermal chain reactions between adjacent energy storage stacks. Furthermore, since debris can be exhausted to the outside through the opening and the through-hole while shortening the travel distance of the gas, debris accumulation in the gas exhaust path can also be prevented.

[0008] In the power storage device according to the present disclosure, the opening may be provided with an exhaust valve for discharging the gas from the smoke exhaust path to the outside of the accommodating case.

[0009] According to the above configuration, it is possible to prevent outside air or foreign matter from the outside of the energy storage device from entering the storage case through the through-hole of the cooler and the opening provided in the bottom part. In addition, it is possible to discharge debris to the outside of the energy storage device through the exhaust valve.

[0010] In the power storage device according to the present disclosure, the storage case may have a bottom, and the opening may be provided in the bottom.

[0011] According to the above configuration, the opening and the through-hole are provided directly below the smoke exhaust path, so that debris can be efficiently discharged to the outside. [Effects of the Invention]

[0012] According to the present disclosure, it is possible to provide an electricity storage device that can suppress the transfer of heat between adjacent electricity storage stacks while suppressing the accumulation of debris. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a schematic diagram showing a vehicle according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the electricity storage device according to the first embodiment. [Figure 3] 1 is a schematic cross-sectional view showing a state in which the electricity storage device according to the first embodiment is mounted. [Figure 4] FIG. 10 is an exploded perspective view of an electricity storage device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

[0015] (Embodiment 1) Fig. 1 is a schematic diagram showing a vehicle according to embodiment 1. Vehicle 1 according to embodiment 1 will be described with reference to Fig. 1.

[0016] The vehicle 1 is a hybrid vehicle that can run using at least one of the power of a motor and an engine, or an electric vehicle that runs using driving force obtained from electrical energy.

[0017] The vehicle 1 includes a vehicle body 2, front wheels 3, rear wheels 4, and a power storage device 10. The vehicle body 2 includes a frame member 5. The power storage device 10 is disposed below the vehicle body 2. The power storage device 10 is disposed, for example, between the front wheels 3 and the rear wheels 4. Note that a portion of the power storage device 10 may be disposed overlapping at least one of the front wheels 3 and the rear wheels 4 when viewed from the width direction of the vehicle 1. The power storage device 10 has an upper surface 10a. The upper surface 10a may function as a floor member that defines the interior of the vehicle cabin.

[0018] 2 is an exploded perspective view of the power storage device according to Embodiment 1. With reference to FIG. 2, the power storage device 10 according to Embodiment 1 will be described in detail.

[0019] 2, the energy storage device 10 includes an energy storage module 100, a housing case 120, a cooler 50, and a plurality of sealing members 60. The energy storage module 100 includes a plurality of energy storage stacks 101 and is housed in the housing case 120.

[0020] The power storage module 100 includes a plurality of power storage stacks 101. The plurality of power storage stacks 101 are arranged in a matrix. When the first direction (DR1) is the column direction and the second direction (DR2) is the row direction, the plurality of power storage stacks 101 are arranged, for example, in 3 rows and 2 columns. Note that the first direction is, for example, parallel to the front-to-rear direction of the vehicle 1 in a state in which the power storage device 10 is mounted on the vehicle body 2. The second direction is perpendicular to the first direction. In the above-mentioned mounted state, the second direction is parallel to the left-to-right direction of the vehicle 1. The plurality of power storage stacks 101 are electrically connected in series.

[0021] Each power storage stack 101 includes a plurality of unit cells 110. In each power storage stack 101, the plurality of unit cells 110 are arranged in the second direction. The plurality of unit cells 110 are electrically connected in series.

[0022] The unit cell 110 has a longitudinal shape with the first direction as the longitudinal direction, and a flat rectangular parallelepiped shape with a thickness in the second direction.

[0023] The unit cell 110 includes a housing 112, within which one or more electrode assemblies are housed.

[0024] When a single electrode body is housed in the housing 112, the electrode body has a shape extending in the longitudinal direction. The electrode body may be a laminated electrode body in which a negative electrode sheet, a separator, and a positive electrode sheet are laminated, or may be a wound electrode body in which a negative electrode sheet, a separator, and a positive electrode sheet are wound.

[0025] When multiple electrode bodies are housed in the housing 112, the multiple electrode bodies are arranged side by side in the longitudinal direction and connected in series. In this case, too, the electrode body may be a stacked electrode body or a wound electrode body.

[0026] The unit cell 110 is a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. The unit cell 110 may use a liquid electrolyte or a solid electrolyte. The unit cell 110 may also be a chargeable and dischargeable capacitor.

[0027] Housing 112 is formed of a metal material such as aluminum. Housing 112 includes first end face 110a and second end face 110b arranged in a first direction, and exhaust valve 111. Exhaust valve 111 is formed on first end face 110a. Exhaust valve 111 opens when the internal pressure of housing 112 exceeds a predetermined value, and exhausts gas inside housing 112 to the outside.

[0028] In each power storage stack 101, the multiple unit cells 110 are arranged in the second direction such that the exhaust valves 111 are alternately located on one side in the first direction and the other side in the first direction. That is, the multiple unit cells 110 are arranged such that the first end faces 110a and the second end faces 110b are alternately arranged in the second direction on each of the one side in the first direction and the other side in the first direction.

[0029] The storage case 120 includes an upper member 300 and a lower case 200. In the present embodiment, the upper member 300 is made of a plate-like member and functions as a top plate. The upper member 300 closes the opening of the lower case 200. The upper member 300 is located above the multiple power storage stacks 101.

[0030] The upper member 300 is not limited to a plate-like shape, and may be a generally box-like shape that opens downward. In this case, the upper member 300 includes a top plate portion and a peripheral wall portion that extends downward from the outer periphery of the top plate portion.

[0031] The lower case 200 has a generally box-like shape that opens upward. The lower case 200 includes a bottom 220, a pair of side walls 211A and 211B, a pair of end walls 211C and 211D, and a plurality of frame members 213A, 213B, 214A, 214B, and 215.

[0032] The bottom portion 220 is disposed facing the upper member 300 in the up-down direction. A plurality of openings 220h are provided in the bottom portion 220. The plurality of openings 220h are provided at positions corresponding to a plurality of frame members 213A, 213B, 214A, and 214B, which will be described later. The plurality of openings 220h extend along the first direction. A pair of side wall portions 211A and 211B and a pair of end wall portions 211C and 211D rise upward from the periphery of the bottom portion 220 and form peripheral walls of the lower case 200.

[0033] The lower case 200 includes a main body portion 35 and a fixed portion 36. The main body portion 35 is composed of the peripheral wall portion and a bottom portion 220. The fixed portion 36 is provided on both side surfaces of the main body portion 35 in the second direction. The fixed portion 36 extends along the first direction. The fixed portion 36 is a portion that is fixed to the vehicle main body 2, as will be described later.

[0034] The pair of side walls 211A, 211B are aligned in the second direction. The pair of side walls 211A, 211B extend along the first direction. The pair of end walls 211C, 211D are aligned in the first direction. The pair of end walls 211C, 211D extend along the second direction.

[0035] Frame member 215 is formed on the upper surface of bottom portion 220 so as to extend in the second direction. Frame member 215 divides the space inside accommodation case 120 in the first direction. Frame member 215 may be formed hollow or solid. When frame member 215 is formed hollow, frame member 215 has a pair of main wall portions aligned in the first direction and an upper wall portion connecting the upper ends of the pair of main wall portions, and a hollow portion is provided between the pair of main wall portions.

[0036] Each of the plurality of frame members 213A, 213B, 214A, and 214B is disposed between two power storage stacks 101 adjacent to each other in the second direction. Each of the plurality of frame members 213A, 213B, 214A, and 214B extends in the first direction.

[0037] The frame members 213A and 214A are arranged in a space on one side in the first direction within the accommodating case 120, which is partitioned by the frame member 215.

[0038] The frame members 213A and 214A are disposed on one side in the first direction between the pair of side wall portions 211A and 211B. The frame members 213A and 214A are disposed apart from the pair of side wall portions 211A and 211B and are disposed with a gap therebetween in the second direction.

[0039] Frame members 213A and 214A divide the space inside accommodating case 120, which is located on one side in the first direction of frame member 215, in the second direction. Specifically, frame members 213A and 214A divide the space inside accommodating case 120 on one side in the first direction into three areas in the second direction. In the space inside accommodating case 120 located on one side in the first direction, an electricity storage stack 101 is arranged in each of the three areas framed by frame members 213A and 214A.

[0040] Frame members 213B and 214B are arranged in a space partitioned by frame member 215 within casing 120 on the other side in the first direction.

[0041] The frame members 213B and 214B are disposed on the other side in the first direction between the pair of side wall portions 211A and 211B. The frame members 213B and 214B are disposed apart from the pair of side wall portions 211A and 211B and are disposed with a gap therebetween in the second direction.

[0042] Frame members 213B and 214B divide the space inside accommodating case 120, which is located on the other side in the first direction of frame member 215, in the second direction. Specifically, frame members 213B and 214B divide the space inside accommodating case 120 on the other side in the first direction into three areas in the second direction. In the space inside accommodating case 120 located on the other side in the first direction, power storage stacks 101 are arranged in each of the three areas framed by frame members 213A and 214A.

[0043] Each of the frame members 213A, 213B, 214A, and 214B opens toward the bottom 220 and is positioned within the housing case 220 so as to cover the opening 220h provided corresponding to the frame member. Each of the frame members 213A, 213B, 214A, and 214B has a pair of main wall portions aligned in the second direction and an upper wall portion connecting the upper ends of the pair of main wall portions. A hollow portion is formed between the pair of main wall portions, and the hollow portion functions as a smoke exhaust path. As a result, a smoke exhaust path is located inside the frame members 213A, 213B, 214A, and 214B. The smoke exhaust path is in communication with the opening 220h.

[0044] The plurality of frame members 213A, 213B, 214A, 214B are provided with inlets 251 to 254, 261 to 264 for introducing gas into the smoke exhaust path.

[0045] Specifically, in the frame member 213A, an inlet 251 is provided in one of the pair of main wall portions located on one side in the second direction, and an inlet 252 is provided in the other of the pair of main wall portions located on the other side in the second direction.

[0046] In the frame member 214A, an inlet 253 is provided in one of the pair of main wall portions located on one side in the second direction, and an inlet 254 is provided in the other of the pair of main wall portions located on the other side in the second direction.

[0047] In the frame member 213B, an inlet 261 is provided in one of the pair of main wall portions located on one side in the second direction, and an inlet 262 is provided in the other of the pair of main wall portions located on the other side in the second direction.

[0048] In the frame member 214B, an inlet 263 is provided in one of the pair of main wall portions located on one side in the second direction, and an inlet 264 is provided in the other of the pair of main wall portions located on the other side in the second direction.

[0049] The cooler 50 is a device for cooling the plurality of power storage stacks 101. The cooler 50 is arranged outside the accommodating case 120. Specifically, the cooler 50 is arranged below the bottom 220 of the lower case 200. The cooler 50 cools the power storage modules 100 via the bottom 220.

[0050] The cooler 50 is made of a metal material such as aluminum. A refrigerant flows inside the cooler 50 to cool the plurality of power storage stacks 101. The cooler 50 has a plurality of through holes 50h at positions corresponding to the plurality of openings 220h. The through holes 50h penetrate the cooler 50. Portions of the cooler 50 surrounding the through holes 50h are welded in the vertical direction or the like to prevent leakage of the refrigerant flowing inside.

[0051] A plurality of sealing members 60 seal the through-holes 50h. Each sealing member 60 is provided with an exhaust valve 61. The exhaust valve 61 opens when the pressure in the smoke exhaust path due to the gas introduced from the inlet exceeds a predetermined value. The exhaust valve 61 functions as a pressure release valve, and when the exhaust valve 61 is opened, gas is discharged to the outside from the bottom side of the cooler 50.

[0052] 3 is a schematic cross-sectional view showing how the power storage device according to embodiment 1 is mounted. With reference to FIG. 3, how the power storage device according to embodiment 1 is mounted will be described.

[0053] As shown in FIG. 3 , the vehicle body 2 includes a frame member 5. The frame member 5 includes a pair of side members 6 and a pair of side sills 7. The pair of side sills 7 are arranged on both ends of the vehicle 1 in the width direction. The pair of side members 6 are arranged inside the pair of side sills 7 with a distance between them. The pair of side members 6 and the pair of side sills 7 extend along the front-rear direction of the vehicle 1.

[0054] The pair of side members 6 are spaced apart in the width direction of the vehicle 1. A main body 35 of the electricity storage device 10 is disposed in the gap between the pair of side members 6. A gap is provided between the main body 35 and the pair of side members 6. This makes it possible to suppress input of an impact to the electricity storage device 10 even in the event of a side collision of the vehicle 1.

[0055] Fixed portions 36 are provided on both side surfaces of the main body portion 35 in the width direction of the vehicle 1. The fixed portions 36 are fixed to the pair of side members 6 by fastening members 8.

[0056] The framework member 5 also includes a cross member 9. The cross member 9 is provided above the electricity storage device 10 so as to straddle from one side sill 7 to the other side sill 7. The electricity storage device 10 is fastened and fixed to the cross member 9.

[0057] In the above description, an example has been given in which the framework member 5 includes a pair of side members 6 and a pair of side sills 7, but this is not limiting. The pair of side sills 7 may also function as the pair of side members 6. In this case, the pair of side members 6 can be omitted, and the above-described fixed portion 36 may be fixed to the pair of side sills 7.

[0058] 2 and 3, when gas is discharged from any one of the plurality of power storage stacks 101 (i.e., when any one of the plurality of unit cells 110 included in any one of the power storage stacks generates heat and discharges gas), the gas is introduced into the smoke exhaust path within the frame member from an inlet provided in the frame member located adjacent to the power storage stack. As described above, the through hole 50h of the cooler 50, which communicates with the smoke exhaust path via the opening 220h provided in the bottom 220, is sealed with the sealing member 60. When the pressure in the smoke exhaust path reaches or exceeds a predetermined value, the exhaust valve 61 is opened, and the gas is discharged from the exhaust valve 61 to the outside of the cooler 50.

[0059] Specifically, for example, when gas is discharged from the power storage stack 101 located furthest to one side in the second direction among the three power storage stacks 101 located on one side in the first direction, the gas is introduced into the smoke exhaust path 231 in the frame member 213A from the inlet 251. When the pressure in the smoke exhaust path 231 reaches or exceeds a predetermined value, the exhaust valve 61 corresponding to the smoke exhaust path 231 is opened. As a result, the gas is discharged from the exhaust valve 61 to the outside of the power storage device 10.

[0060] When gas is discharged from the power storage stack 101 located in the center in the second direction among the three power storage stacks 101 located on one side in the first direction, part of the gas is introduced into the smoke exhaust path 231 in the frame member 213A from the inlet 252. At least another part of the gas is introduced into the smoke exhaust path 232 in the frame member 214A from the inlet 253. When the pressure in the smoke exhaust paths 231, 232 reaches or exceeds a predetermined value, the exhaust valves 61 corresponding to the respective smoke exhaust paths are opened, and the gas is discharged from the exhaust valves 61 to the outside of the power storage device 10.

[0061] Specifically, for example, when gas is discharged from the power storage stack 101 located furthest in the second direction among the three power storage stacks 101 located on one side in the first direction, the gas is introduced into the smoke exhaust path 232 in the frame member 214A from the inlet 254. When the pressure in the smoke exhaust path 232 reaches or exceeds a predetermined value, the exhaust valve 61 corresponding to the smoke exhaust path 232 is opened, and the gas is discharged from the exhaust valve 61 to the outside of the power storage device 10.

[0062] When gas is discharged from one of the three power storage stacks 101 located on the other side in the first direction, the manner in which the gas is discharged is substantially the same as when gas is discharged from one of the three power storage stacks 101 located on one side in the first direction, and therefore a detailed description thereof will be omitted. In this case, the gas is introduced into the smoke exhaust path located in frame member 213B or 214B from inlets 261, 262 provided in frame member 213B or 263, 264 provided in frame member 214B.

[0063] As described above, in this embodiment, when gas is discharged from one of the adjacent storage stacks 101, the gas is introduced into the smoke exhaust path located within the frame member from an inlet provided in the frame member arranged between the adjacent storage stacks 101, and the gas is discharged to the outside of the storage device 10 from the exhaust valve 61 provided in the through hole 50h of the cooler 50 that communicates with the opening 220h provided in the bottom 220.

[0064] In this way, the gas introduced into the frame member is discharged in a short distance from the exhaust valve 61 facing the smoke exhaust path, thereby preventing the frame member from becoming too hot. As a result, heat transfer from the frame member to the power storage stack adjacent to the frame member on the opposite side from the heated power storage stack can be prevented, and thermal chain reaction between adjacent power storage stacks can be prevented.

[0065] In addition, the distance from the inlet of the frame member to the opening 220h and the through-hole 50h is shortened, and debris can also be discharged to the outside through the exhaust valve. This also makes it possible to suppress the accumulation of debris in the smoke exhaust path. Furthermore, by providing the opening 220h and the through-hole 50h directly below the smoke exhaust path, debris can be efficiently discharged to the outside.

[0066] As described above, in the power storage device 10 according to this embodiment, it is possible to suppress the transfer of heat between adjacent power storage stacks 101 while suppressing the accumulation of debris.

[0067] Furthermore, by providing an exhaust valve 61 in the through hole 50h of the cooler 50, it is possible to prevent outside air or foreign matter from outside the storage case 120 from entering the storage case 120 through the through hole 50h of the cooler 50 and the opening 220h provided in the bottom 220.

[0068] (Embodiment 2) 4 is an exploded perspective view of the power storage device according to Embodiment 2. With reference to FIG. 4, a power storage device 10A according to Embodiment 2 will be described.

[0069] 4, when compared with the power storage device 10 according to the first embodiment, the power storage device 10A according to the second embodiment differs mainly in the configurations of the accommodating case 120 and the cooler 50, and the number and arrangement of the power storage stacks 101. The other configurations are substantially the same.

[0070] In power storage device 10A according to the second embodiment, two power storage stacks 101 are arranged at an interval in the first direction, and frame member 213D is arranged between two power storage stacks 101.

[0071] In the power storage stack 101 located on one side in the first direction, the unit cells 110 included in the power storage stack 101 are arranged in the second direction such that the first end faces 110a of the unit cells 110 face the other side in the first direction. That is, the exhaust valves 111 provided in the unit cells 110 face the frame member 213D. The exhaust valves 111 are arranged in the second direction while being alternately shifted in the up-down direction.

[0072] In the power storage stack 101 located on the other side in the first direction, the unit cells 110 included in the power storage stack 101 are arranged in the second direction such that the first end faces 110a of the unit cells 110 face one side in the first direction. That is, the exhaust valves 111 provided in the unit cells 110 face the frame member 213D. The exhaust valves 111 are arranged in the second direction while being alternately shifted in the up-down direction.

[0073] The frame member 213D is disposed in approximately the center of the bottom portion 220 in the first direction. The frame member 213D extends along the second direction. The frame member 213D is provided so as to cover an opening 220h provided in the bottom portion 220. The opening 220h extends along the second direction.

[0074] A smoke exhaust path through which gas can flow is provided inside frame member 213D, and this smoke exhaust path is in communication with opening 220h. Frame member 213D has a pair of main wall portions facing each other in the first direction with a gap between them, and an upper wall portion connecting the upper ends of the pair of main wall portions, and the smoke exhaust path is located between the pair of main wall portions.

[0075] The frame member 213D is provided with a plurality of inlets 251B, 252B. The plurality of inlets 251B are provided in one of the pair of main wall portions that is located on one side in the first direction. The plurality of inlets 251B open toward a region in which the power storage stacks 101 located on one side in the first direction are disposed. The plurality of inlets 251B are lined up in the second direction while being alternately shifted in the vertical direction, and face a plurality of exhaust valves 111 provided in the power storage stacks 101 located on one side in the first direction.

[0076] The multiple inlets 252B are provided in one of the pair of main wall portions that is located on the other side in the first direction. The multiple inlets 252B open toward a region where the power storage stack 101 located on the other side in the first direction is disposed. The multiple inlets 252B are lined up in the second direction while being alternately shifted in the vertical direction, and face the multiple exhaust valves 111 provided in the power storage stack 101 located on the other side in the first direction.

[0077] When gas is discharged from either of the two power storage stacks 101, the gas is introduced into the smoke exhaust path from either of the inlets 251B and 252B that open toward the area where the power storage stack 101 that discharges the gas is located. When the pressure in the smoke exhaust path reaches or exceeds a predetermined value, the exhaust valve 61 is opened, and the gas introduced into the smoke exhaust path is discharged from the exhaust valve 61 to the outside of the power storage device 10.

[0078] Even when configured as described above, power storage device 10A according to the second embodiment can achieve substantially the same effects as power storage device 10 according to the first embodiment.

[0079] In each energy storage stack 101, the multiple unit cells 110 may be arranged in the second direction such that the exhaust valves 111 are alternately located on one side in the first direction and the other side in the first direction, similar to the first embodiment.

[0080] (Other variations) In the above-described first and second embodiments, the case where the seal member 60 that seals the through hole 50h of the cooler 50 is provided has been described as an example, but the present invention is not limited to this, and the seal member 60 may be omitted. In this case, the gas and debris are directly discharged to the outside of the power storage device through the opening 220h and the through hole 50h.

[0081] Furthermore, the number of multiple storage stacks 101 is not limited to the number described in embodiments 1 and 2, and can be changed as appropriate as long as a frame member with a smoke exhaust path is installed between adjacent storage stacks, and openings 220h and through holes 50h are provided in the bottom 220 and the cooler 50 so as to communicate with the smoke exhaust path.

[0082] In the above-described first and second embodiments, the case where the exhaust valve 61 is provided in the through-hole 50h of the cooler 50 has been described as an example, but the exhaust valve 61 may be provided in the opening 220h. Furthermore, when the exhaust valve 61 is provided in the opening 220h, the cooler 50 may be disposed between the bottom 220 and the electricity storage module 100. Furthermore, the case where the opening 220h is provided in the bottom 220 has been described as an example, but this is not limiting, and the opening 220h may be provided in the upper member 300. In this case, each frame member has a shape that opens upward and covers the opening 220h. The cooler 50 may be provided between the upper member 300 and the electricity storage module 100, or may be disposed above the upper member 300.

[0083] The embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0084] REFERENCE SIGNS LIST 1 vehicle, 2 vehicle body, 3 front wheel, 4 rear wheel, 5 frame member, 6 side member, 7 side sill, 8 fastening member, 9 cross member, 10, 10A power storage device, 10a upper surface, 35 main body portion, 36 fixed portion, 50 cooler, 50h through hole, 60 sealing member, 61 exhaust valve, 100 power storage module, 101 power storage stack, 110 unit cell, 110a first end surface, 110b second end surface, 111 exhaust valve, 112 housing, 120 storage case, 200 lower case, 211A, 211B side wall portion, 211C, 211D end wall portion, 213A, 213B, 213D, 214A, 214B, 215 frame member, 220 bottom portion, 220h Openings, 231, 232 Smoke exhaust channels, 251, 251B, 252, 252B, 253, 254, 261, 262, 263, 264 Inlets, 300 Upper members.

Claims

1. a storage case having an opening; a power storage module disposed in the housing case; a frame member provided in the housing case so as to cover the opening; a cooler that cools the power storage module, the energy storage module includes energy storage stacks arranged adjacent to each other; the frame member is disposed between the adjacently disposed power storage stacks, A smoke exhaust path communicating with the opening is located inside the frame member, an inlet port is provided in the frame member for introducing gas discharged from any of the adjacently arranged power storage stacks into the gas exhaust path; The cooler has a through hole at a position corresponding to the opening.

2. The power storage device according to claim 1 , wherein either the opening or the through-hole is provided with an exhaust valve for discharging the gas from the smoke exhaust path to the outside of the housing case.

3. The container case has a bottom, The power storage device according to claim 1 , wherein the opening is provided in the bottom portion.

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