Electricity storage device and vehicle

Abstract

The utility model relates to a power storage device and a vehicle. A power storage device is provided with a plurality of power storage stacks and a housing case that houses the plurality of power storage stacks, and the housing case includes a top plate portion that is positioned above the plurality of power storage stacks and has a concave-convex shape, and a partitioning member that partitions a region in which each of the plurality of power storage stacks is disposed. The top plate portion includes a protruding portion protruding upward and a recessed portion recessed downward, the partitioning member is disposed between the adjacent power storage stacks, a flow path through which gas discharged from the power storage stacks flows is provided inside the partitioning member, and the partitioning member is in contact with the recessed portion.

Description

Technical Field

[0001] This disclosure relates to energy storage devices and vehicles equipped with such energy storage devices. Background Technology

[0002] As a conventional energy storage device, International Patent Publication No. 2020 / 134054 discloses a structure in which a partitioning member is constructed using a hollow component to divide areas for the respective configuration of multiple energy storage stacks, and the hollow portion of the hollow component is used as a smoke exhaust path. Multiple through holes are provided in the hollow component for introducing gas discharged from the energy storage device. Utility Model Content

[0003] When the temperature of the gas discharged from the energy storage device is quite high and the gas flows through the exhaust path, the temperature of the partition member with that exhaust path also increases. The partition member is positioned between two adjacent energy storage devices. Therefore, if the temperature of the partition member increases without any measures being taken, heat will be transferred to energy storage devices located near the partition member, potentially causing a cascading overheating of multiple energy storage devices.

[0004] This disclosure is made in view of the aforementioned problems, and the object of this disclosure is to provide an energy storage device and a vehicle that can suppress the heating of the other of the two adjacent energy storage devices when gas is discharged from one of the two adjacent energy storage devices.

[0005] The energy storage device based on this disclosure includes: a plurality of energy storage stacks; and a housing housing containing the plurality of energy storage stacks. The housing housing includes a top plate portion having a concave-convex shape located above the plurality of energy storage stacks, and a partitioning member dividing areas for the respective configuration of the plurality of energy storage stacks. The top plate portion includes an upwardly projecting convex portion and a downwardly recessed portion. Inside the partitioning member, a flow path is provided for the flow of gas discharged from the energy storage stacks. The partitioning member contacts the recessed portion.

[0006] According to the above configuration, when gas is discharged from the energy storage stack, by having a partition member, which has a flow path for gas flow inside, abut against the top plate of the housing, the heat of the gas flowing in the flow path can be transferred to the top plate via the partition member. By having the top plate have an uneven shape, the heat dissipation of the top plate is improved, and heat can be effectively dissipated to the outside of the housing. As a result, when gas is discharged from one of the two adjacent energy storage devices, heat transfer to the other of the two adjacent energy storage devices can be suppressed, and the heating of the other energy storage device can be suppressed.

[0007] In the energy storage device based on the present disclosure, the protrusion and the recess can be configured to extend along a direction intersecting the vertical direction.

[0008] According to the above configuration, by extending the protrusions and concave portions along a predetermined direction, the surface area of ​​the top plate portion can be increased. This further improves heat dissipation from the top plate portion.

[0009] The vehicle based on this disclosure has the aforementioned energy storage device and vehicle body. The aforementioned protrusion is in contact with a portion of the aforementioned vehicle body.

[0010] Based on the above configuration, heat that can be transferred from the partition components to the top plate can be transferred to the vehicle body via the protrusion, and heat can also be dissipated from the vehicle body.

[0011] According to this disclosure, an energy storage device and a vehicle are provided that can suppress the heating of the other energy storage device when gas is discharged from one of the two adjacent energy storage devices. Attached Figure Description

[0012] The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, in which the same reference numerals denote the same elements, and wherein:

[0013] Figure 1 This is a schematic diagram showing the vehicle according to Embodiment 1.

[0014] Figure 2 This is a schematic exploded perspective view of the energy storage device according to Embodiment 1.

[0015] Figure 3 This is a schematic cross-sectional view showing the configuration of the energy storage device according to Embodiment 1.

[0016] Figure 4 This is a schematic exploded perspective view of the energy storage device according to Embodiment 2.

[0017] Figure 5 This is a schematic exploded perspective view of the energy storage device according to Embodiment 3. Detailed Implementation

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in the embodiments shown below, the same or common parts will be labeled with the same reference numerals in the drawings and will not be described repeatedly.

[0019] (Implementation Method 1)

[0020] Figure 1 This is a schematic diagram showing the vehicle according to Embodiment 1. (Refer to...) Figure 1The vehicle 1 of Embodiment 1 will be described.

[0021] Vehicle 1 is a hybrid vehicle capable of driving using power from at least one of a motor and an engine, or an electric vehicle capable of driving using driving force obtained through electrical energy.

[0022] like Figure 1 As shown, vehicle 1 includes a vehicle body 2, front wheels 3, rear wheels 4, an electrical storage device 10, a pair of front seats 71, a rear seat 72, and a floor carpet 80. The vehicle body 2 includes a passenger space S. The passenger space S is located above the floor carpet 80. A pair of front seats 71 and a rear seat 72 are arranged in the passenger space S. The pair of front seats 71 are spaced apart from each other in the width direction of the vehicle. The rear seat 72 is located behind the pair of front seats 71. The rear seat 72 extends in the width direction of the vehicle.

[0023] The energy storage device 10 is disposed below the passenger space S. The energy storage device 10 is fixed to the vehicle body 2. The energy storage device 10 has an upper surface 10a. This upper surface 10a also functions as a floor component within the vehicle interior. A floor carpet 80 is located above the upper surface 10a. A heat insulation component may also be disposed in the gap between the floor carpet 80 and the upper surface 10a. The floor carpet 80 may also be configured to cover the transverse (cross) component 9 (described later) from above. Figure 2 ).

[0024] Figure 2 This is a schematic exploded perspective view of the energy storage device according to Embodiment 1. (Refer to...) Figure 2 The details of the energy storage device 10 in Embodiment 1 will be described.

[0025] like Figure 2 As shown, the energy storage device 10 includes an energy storage module 100 and a housing 120. The energy storage module 100 includes a plurality of energy storage stacks 101 and is housed within the housing 120.

[0026] The energy storage module 100 includes a plurality of energy storage stacks 101. The plurality of energy storage stacks 101 are arranged in rows and columns within a housing 120. When the first direction (DR1) is set as the column direction and the second direction (DR2) is set as the row direction, the plurality of energy storage stacks 101 are arranged, for example, in a 3-row, 2-column configuration. Furthermore, in the mounted state where the energy storage device 10 is mounted on the vehicle body 2, the first direction is, for example, parallel to the longitudinal direction of the vehicle 1. The second direction is orthogonal to the first direction. In the aforementioned mounted state, the second direction is parallel to the lateral direction of the vehicle 1. The plurality of energy storage stacks 101 are electrically connected in series.

[0027] Each energy storage stack 101 includes a plurality of unit batteries 110. In each energy storage stack 101, the plurality of unit batteries 110 are arranged in a second direction. The plurality of unit batteries 110 are electrically connected in series.

[0028] The unit cell 110 has a long dimension (vertical length) shape with the first direction as its length direction. The unit cell 110 has a flat cuboid shape with thickness in the second direction.

[0029] The unit battery 110 includes a housing 112, inside which one or more electrodes are housed.

[0030] When a single electrode body is housed within the housing 112, the electrode body has a shape extending in the aforementioned length direction. The electrode body may be a stacked electrode body formed by stacking a negative electrode, a separator, and a positive electrode, or a wound electrode body formed by winding a negative electrode, a separator, and a positive electrode.

[0031] When multiple electrode bodies are housed within the housing 112, the electrode bodies are arranged in a longitudinal direction and connected in series. In this case, the electrode bodies can be either stacked electrode bodies or wound electrode bodies.

[0032] Unit battery 110 is a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. Unit battery 110 can use either a liquid electrolyte or a solid electrolyte. Unit battery 110 can also be a rechargeable and dischargeable capacitor.

[0033] The housing 112 is formed of a metallic material, such as aluminum. The housing 112 includes a first end face 110a and a second end face 110b arranged in a first direction, and an exhaust valve 111. The exhaust valve 111 is formed on the first end face 110a. The exhaust valve 111 opens when the internal pressure of the housing 112 exceeds a predetermined value, discharging gas from inside the housing 112 to the outside of the housing 112.

[0034] In each energy storage stack 101, a plurality of unit batteries 110 are arranged in a second direction such that an exhaust valve 111 is alternately located on one side of the first direction and the other side of the first direction. That is, the plurality of unit batteries 110 are arranged in a manner in which a first end face 110a and a second end face 110b on one side of the first direction and the other side are alternately arranged in the second direction.

[0035] The housing 120 includes an upper member 300 and a lower housing 200. In this embodiment, the upper member 300 is composed of a plate-like member and functions as a top plate. The upper member 300 closes the opening of the lower housing 200. The upper member 300 is located above the plurality of energy storage stacks 101 and has an uneven shape.

[0036] The upper member 300 has a plurality of protrusions 301 and a plurality of recesses 302. The plurality of protrusions 301 and the plurality of recesses 302 are configured to extend along a direction intersecting the vertical direction. Specifically, the plurality of protrusions 301 and the plurality of recesses 302 extend along a first direction.

[0037] Multiple protrusions 301 and multiple recesses 302 are arranged alternately in a second direction. The protrusions 301 protrude upwards, and the recesses 302 are recessed downwards. The protrusions 301 and the recesses 302 constitute the convex-concave shape of the upper member 300.

[0038] Furthermore, the upper member 300 is not limited to a plate shape, but may also be a generally box-shaped shape with an opening facing downward. In this case, the upper member 300 includes a top plate portion and a peripheral wall portion extending downward from the outer peripheral edge of the top plate portion, the top plate portion having a concave-convex shape.

[0039] The lower shell 200 has a generally box-shaped shape with an opening facing upward. The lower shell 200 includes a base plate 220, a pair of side wall portions 211A, 211B, a pair of end wall portions 211C, 211D, a plurality of partition members 213A, 213B, 214A, 214B and a partition member 215.

[0040] The base plate 220 is arranged opposite to the upper member 300 in the vertical 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 base plate 220 to form the peripheral wall portion of the lower shell 200.

[0041] The lower shell 200 includes a main body portion 35 and a fixed portion 36. The main body portion 35 is composed of the aforementioned peripheral wall portion and bottom plate 220. The fixed portions 36 are provided on both sides of the main body portion 35 in the second direction. The fixed portions 36 extend along the first direction. The fixed portions 36 are the parts that are fixed to the vehicle body 2 as described later.

[0042] A pair of sidewall portions 211A and 211B are arranged in a second direction. A pair of sidewall portions 211A and 211B extend along a first direction. A pair of endwall portions 211C and 211D are arranged in a first direction. A pair of endwall portions 211C and 211D extend along a second direction.

[0043] The partition member 215 is formed extending in a second direction on the upper surface of the base plate 220. The partition member 215 divides the space within the housing 120 in a first direction. The partition member 215 may be formed as hollow.

[0044] Multiple partition components 213A, 213B, 214A, and 214B are each disposed between two adjacent energy storage stacks 101 in the second direction.

[0045] The partition members 213A and 214A are disposed in the space on one side of the receiving shell 120 in the first direction, which is separated by the partition member 215.

[0046] The partition members 213A and 214A are disposed on one side in the first direction between a pair of sidewall portions 211A and 211B. The partition members 213A and 214A are disposed separately from the pair of sidewall portions 211A and 211B, and are disposed at intervals in the second direction.

[0047] The partition members 213A and 214A divide the space within the housing 120 located on the side in the first direction that is closer to the partition member 215 than in the second direction in the second direction. Specifically, the partition members 213A and 214A divide the space on one side in the first direction within the housing 120 into three parts in the second direction. Within the space within the housing 120 located on one side in the first direction, in each of the three areas partitioned by the partition members 213A and 214A, an energy storage stack 101 is disposed.

[0048] The partition members 213B and 214B are disposed in the space on the other side of the first direction within the receiving shell 120 separated by the partition member 215.

[0049] The dividing members 213B and 214B are disposed on the other side of the first direction between a pair of sidewall portions 211A and 211B. The dividing members 213B and 214B are disposed separately from the pair of sidewall portions 211A and 211B, and are disposed at intervals in the second direction.

[0050] The partition members 213B and 214B divide the space within the housing 120, which is located on the other side of the housing 120 in the first direction, in the second direction. Specifically, the partition members 213B and 214B divide the space on the other side of the first direction within the housing 120 into three parts in the second direction. Within the space within the housing 120 on the other side of the first direction, in each of the three areas partitioned by the partition members 213B and 214B, an energy storage stack 101 is disposed.

[0051] A flow path for gas flow is provided inside the pair of sidewall portions 211A, 211B, the pair of endwall portions 211C, 211D, and the multiple partition members 213A, 213B, 214A, 214B. Additionally, the endwall portion 211C has outlets 290A and 290B for discharging gas to the outside of the housing 120, and the endwall portion 211D has outlets 291A and 291B for discharging gas to the outside of the housing 120.

[0052] Side wall openings 255 and 265 are provided in the side wall portion 211A. The side wall opening 255 is connected to a flow path 235 provided in the side wall portion 211A (see reference). Figure 3 The side wall opening 255 is connected to the outlets 291A and 291B via a flow path (not shown) provided in the side wall 211A.

[0053] The partition member 213A is provided with openings 251 and 252. Opening 251 is located on one side of the main surface of the partition member 213A in the second direction. Opening 252 is located on the other side of the main surface of the partition member 213A in the second direction. Openings 251 and 252 are connected via flow paths 231 and 232 (see reference) provided inside the partition member 213A. Figure 3 It is connected to outlets 290A and 290B.

[0054] The partition member 214A is provided with openings 253 and 254. Opening 253 is located on one side of the main surface of the partition member 214A in the second direction. Opening 254 is located on the other side of the main surface of the partition member 214A in the second direction. Openings 253 and 254 are connected via flow paths 233 and 234 (see reference) provided inside the partition member 214A. Figure 3 It is connected to outlets 290A and 290B.

[0055] The partition member 213B is provided with openings 261 and 262. Opening 261 is provided on the main surface of the partition member 213B located on one side in the second direction. Opening 262 is provided on the main surface of the partition member 213B located on the other side in the second direction. Openings 261 and 262 communicate with outlets 291A and 291B via flow paths (not shown) provided inside the partition member 213B.

[0056] The partition member 214B is provided with openings 263 and 264. Opening 263 is provided on the main surface of the partition member 214B located on one side in the second direction. Opening 264 is provided on the main surface of the partition member 214B located on the other side in the second direction. Openings 263 and 264 communicate with outlets 291A and 291B via flow paths (not shown) provided inside the partition member 214B.

[0057] Side wall openings 256 and 266 are provided in the side wall portion 211B. The side wall opening 256 is connected to a flow path 236 provided in the side wall portion 211B (see reference). Figure 3 The side wall opening 266 is connected to the outlets 291A and 291B via a flow path (not shown) provided in the side wall 211A.

[0058] The aforementioned side wall openings 255, 256, 265, 266 and openings 251-254, 261-264 open toward any one of the regions where the plurality of energy storage stacks 101 are disposed. When gas is discharged from any one of the plurality of energy storage stacks 101, the gas is introduced into any one of the aforementioned flow paths from the aforementioned side wall openings and openings that open toward the region where the energy storage stack 101 with discharged gas is disposed, and is discharged to the outside of the housing 120 from the discharge outlets 290A, 290B or discharge outlets 291A, 291B.

[0059] Figure 3 This is a schematic cross-sectional view showing the configuration of the energy storage device according to Embodiment 1. (Refer to...) Figure 3 The case where the battery is equipped with an energy storage device 10 will be explained.

[0060] like Figure 3 As shown, 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 disposed at both ends in the width direction of the vehicle 1. The pair of side members 6 are disposed at a distance from each other inside the pair of side sills 7. The pair of side members 6 and the pair of side sills 7 extend along the front-rear direction of the vehicle 1.

[0061] A pair of longitudinal beams 6 are separated in the width direction of the vehicle 1. The main body 35 of the energy storage device 10 is disposed in the gap between the pair of longitudinal beams 6. A gap is provided between the main body 35 and the pair of longitudinal beams 6. Thus, even in the event of a side collision of the vehicle 1, the impact input to the energy storage device 10 can be suppressed.

[0062] Fixed portions 36 are provided on both sides of the main body 35 in the width direction of vehicle 1. The fixed portions 36 are fixed to a pair of longitudinal beams 6 by fastening connecting members 8.

[0063] The frame member 5 also includes a transverse member 9. The transverse member 9 is positioned above the energy storage device 10, extending from one threshold 7 to the other. The energy storage device 10 is securely connected and fixed to the transverse member 9.

[0064] In the foregoing, the case in which the frame member 5 includes a pair of longitudinal beams 6 and a pair of thresholds 7 was illustrated, but this disclosure is not limited to this. The pair of thresholds 7 may also function as a pair of longitudinal beams 6. In this case, the pair of longitudinal beams 6 can be omitted, and the aforementioned fixed part 36 can also be fixed to the pair of thresholds 7.

[0065] Within the housing 120, the upper surfaces of the plurality of partition members 213A, 213B, 214A, and 214B respectively contact the recess 302 of the upper member 300. In addition, the upper surfaces of a pair of sidewall portions 211A and 211B also contact the recess 302.

[0066] As described above, multiple partition members 213A, 213B, 214A, 214B and a pair of sidewall portions 211A, 211B are provided with flow paths for gas to flow from the energy storage stack 101. When gas flows through these flow paths, the temperature of the partition members and sidewall portions having these flow paths rises.

[0067] At this time, through the contact between the multiple partition members 213A, 213B, 214A, 214B and the pair of sidewall portions 211A, 211B and the aforementioned recess 302, the heat of the gas flowing in the flow path can be transferred to the upper member 300 via the partition members and the sidewall portions. By giving the upper member 300 a concave-convex shape, the heat dissipation of the upper member 300 is improved, and heat can be effectively dissipated to the outside of the housing 120. As a result, when gas is discharged from one of the two adjacent energy storage stacks 101, heat transfer to the other of the two adjacent energy storage stacks 101 can be suppressed, and the heating of the other energy storage stack can be suppressed.

[0068] Furthermore, the protrusion 301 of the upper member 300 contacts the transverse member 9, which is part of the vehicle body 2. Therefore, heat that has been transferred from the partition member and / or side wall portion to the upper member 300 can be transferred to the vehicle body 2 via the protrusion, and heat can also be dissipated from the vehicle body 2 toward the outside.

[0069] Furthermore, by extending the protrusion 301 and the recess 302 in a direction intersecting the vertical direction, the surface area of ​​the upper member 300 can be increased. This further improves the heat dissipation from the upper member 300.

[0070] With the protrusion 301 and the recess 302 extending in a direction parallel to the front-rear direction of the vehicle, external gas can easily flow in the recess 302 when the vehicle 1 is in motion, thereby further improving the heat dissipation of the upper member 300.

[0071] Furthermore, by giving the upper member 300 a concave-convex shape, the rigidity of the upper member 300 can be improved.

[0072] Alternatively, the partition member 215 may be provided with a flow path for the gas to flow, and the upper surface of the partition member 215 may contact the recess 302. In this case, heat from the gas flowing within the partition member 215 can also be transferred to the upper member 300.

[0073] (Implementation Method 2)

[0074] Figure 4 This is a schematic exploded perspective view of the energy storage device according to Embodiment 2. (Refer to...) Figure 4 The energy storage device 10A of Embodiment 2 will be described.

[0075] like Figure 4 As shown, the energy storage device 10A of Embodiment 2 differs from the energy storage device 10 of Embodiment 1 in the configuration of the housing 120 and the number of energy storage stacks 101. Other configurations are generally the same.

[0076] In the energy storage device 10A of Embodiment 2, two energy storage stacks 101 are arranged at a distance from each other in a first direction. The lower shell 200 includes two partition members 213C and 213D. Flow paths for gas flow are provided inside the partition members 213C and 213D.

[0077] Two partition members 213C and 213D are arranged at a distance from each other in a first direction. Partition member 213C is located on the side in the first direction closer to partition member 213D than partition member 213D. Partition member 213D is disposed approximately at the center of the base plate 220 in the first direction. Partition members 213C and 213D extend along a second direction. The two partition members 213C and 213D are disposed on the base plate 220, dividing the space within the housing 120 into three sections in the second direction.

[0078] The dividing member 213C has multiple openings 251A. The dividing member 213D has multiple openings 251B and multiple openings 252A. The end wall portion 211D has multiple openings 252B.

[0079] Multiple openings 251A and 251B are located between partition member 213C and partition member 213D, opening toward the area where the energy storage stack 101 is disposed. Multiple openings 252A and 252B are located between partition member 213D and end wall portion 211D, opening toward the area where the energy storage stack 101 is disposed.

[0080] The aforementioned openings 251A, 251B, 252A, and 252B communicate with the outlets 290A and 290B via flow paths provided inside a pair of sidewall portions 211A and 211B, partition members 213C and 213D, and a pair of endwall portions 211C and 211D. Each opening 251A, 251B, 252A, and 252B is arranged opposite to the exhaust valve 111 of the unit battery 110.

[0081] When gas is discharged from either of the two energy storage stacks 101, the gas is introduced into any of the flow paths from any of the openings 251A, 251B, 252A, 252B that open toward the area of ​​the energy storage stack 101 where the gas is discharged, and is discharged to the outside of the housing 120 from the discharge outlets 290A, 290B or 291A, 291B.

[0082] In this embodiment, the partition members 213C and 213D also contact the recess 302 of the upper member 300. Therefore, even in the energy storage device 10A of Embodiment 2 and the vehicle equipped with the energy storage device 10A, it is possible to obtain substantially the same effect as the energy storage device 10 and the vehicle 1 of Embodiment 1.

[0083] Furthermore, by arranging the openings 251A, 251B, 252A, and 252B opposite to the exhaust valve 111 of the unit battery 110, the gas discharged from the exhaust valve 111 can be directly introduced into the flow path.

[0084] (Implementation Method 3)

[0085] Figure 5 This is a schematic exploded perspective view of the energy storage device according to Embodiment 3. (Refer to...) Figure 5 The energy storage device 10B of Embodiment 3 will be described.

[0086] like Figure 5 As shown, the energy storage device 10B of Embodiment 3 differs from the energy storage device 10A of Embodiment 2 in the configuration of the housing 120 and the number and arrangement of the energy storage stacks 101. Other configurations are largely the same.

[0087] In the energy storage device 10B of Embodiment 3, the housing 120 is divided into five regions by four partition members 213, and five energy storage stacks 101 are arranged at intervals in the second direction. Partition members 213 are arranged between adjacent energy storage stacks 101 in the first direction. Furthermore, the number of energy storage stacks 101 is not limited to five; two or more are acceptable. The number of partition members 213 can be appropriately set according to the number of energy storage stacks 101.

[0088] In each energy storage stack 101, the multiple unit batteries 110 included in the energy storage stack 101 are arranged in the second direction such that the first end face 110a of each unit battery 110 faces the other side in the first direction. That is, in each energy storage stack 101, all the multiple vent valves 111 face the other side in the first direction. The multiple vent valves 111 are arranged in the second direction in a state of alternating vertical offset.

[0089] Each partition member 213 is provided with a plurality of openings 25h1, 25h2 that open toward a region on one side of the partition member in the first direction. The end wall portion 211D is also provided with a plurality of openings 25h1, 25h2 that open toward a region on one side of the end wall portion 211D in the first direction. The plurality of openings 25h1, 25h2 are arranged in a second direction, alternately staggered in the vertical direction. The plurality of openings 25h1, 25h2 are opposite to the plurality of exhaust valves 111 included in the energy storage stack 101 located on one side in the first direction. Therefore, gas discharged from the exhaust valves 111 can be directly introduced into the partition member 213 or the end wall portion 211D through the openings 25h1, 25h2. The gas introduced into the partition member 213 and the end wall portion 211D is discharged from the outlets 290A, 290B through a flow path.

[0090] In this embodiment, each of the multiple partition members 213 also contacts the recess 302 of the upper member 300. Therefore, the energy storage device 10B and the vehicle of Embodiment 3 can achieve substantially the same effect as the energy storage device 10A and the vehicle of Embodiment 2.

[0091] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of this utility model is defined by the claims and is intended to include all modifications within the meaning and scope of the claims.

Claims

1. An electric power storage device, characterized by comprising: Possessing: a plurality of power storage stacks; and a housing that houses the plurality of power storage stacks, the housing includes a top plate portion that is positioned above the plurality of power storage stacks and has a concave-convex shape, and a partition member that partitions a region in which each of the plurality of power storage stacks is arranged, the top plate portion includes a convex portion that protrudes toward an upper side and a concave portion that is recessed toward a lower side, a flow path through which gas discharged from the power storage stack flows is provided inside the partition member, the partition member is in contact with the concave portion.

2. The power storage device according to claim 1, characterized in that the convex portion and the concave portion are provided so as to extend in a direction that intersects with the up-down direction.

3. A vehicle characterized by comprising: Possessing: the power storage device according to claim 1 or 2; and a vehicle body, the convex portion is in contact with a portion of the vehicle body.

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