Vehicle

Abstract

To provide a vehicle that can suppress transfer of heat to a boarding space when gas is discharged from a power storage device.SOLUTION: A vehicle 1 includes: a vehicle body 2 provided with a boarding space S; and a power storage device 10 disposed below the boarding space 2. The power storage device 10 includes one or more power storage stacks 101 and an accommodation case 120 that accommodates the one or more power storage stacks 101. The accommodation case 120 has a lower case 200 in which the one or more power storage stacks 101 are disposed, and a plurality of wall portions 210 that partitions a region in which the one or more power storage stacks 101 are disposed. A gas-discharge path through which gas discharged from the one or more power storage stacks 101 is flowable is provided inside the wall portions 210, and a heat insulating member 40 is disposed between the boarding space and the wall portions 210.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present disclosure relates to a vehicle, and more particularly to a vehicle equipped with an electricity storage device. [Background technology]

[0002] As a conventional energy storage device, International Publication No. 2020 / 134054 (Patent Document 1) discloses a structure in which part of a housing case that houses multiple energy storage stacks is made of a hollow member, and the hollow portion of the hollow member is used as an exhaust path for gas generated from the energy storage stacks. [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] However, the gas generated from the power storage stack has a considerable temperature, and if the power storage device described in Patent Document 1 is installed in a vehicle without any other measures, there is a concern that heat will be transferred from the part of the housing case that forms the exhaust path to the passenger space.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide a vehicle that can suppress the transfer of heat to the passenger space when gas is discharged from the storage device. [Means for solving the problem]

[0006] A vehicle according to the present disclosure includes a vehicle body having a passenger space and an electric power storage device arranged below the passenger space. The electric power storage device includes one or more electric power storage stacks and a housing case that houses the one or more electric power storage stacks. The housing case has a lower case in which the one or more electric power storage stacks are arranged, and a plurality of wall sections that partition an area in which the one or more electric power storage stacks are arranged. An exhaust path is provided inside the plurality of wall sections, through which gas discharged from the one or more electric power storage stacks can flow. A heat insulating member is arranged between the plurality of wall sections and the passenger space.

[0007] According to the above configuration, an insulating member is arranged between each of the multiple wall sections that make up the exhaust path and the passenger space, so that even if gas discharged from the storage stack flows through the wall section, heat transfer from the wall section to the passenger space can be suppressed.

[0008] In the vehicle according to the present disclosure, the storage case may have an upper member that seals an opening of the lower case, and the heat insulating member may be disposed between each of the plurality of wall portions and the upper member.

[0009] According to the above configuration, heat from the gas flowing through the exhaust path is prevented from being transferred from each of the multiple wall portions to the upper member, and thus heat is prevented from being transferred from the upper member to the passenger space.

[0010] In the vehicle according to the present disclosure, a cross member constituting a part of the frame of the vehicle body may be disposed between the passenger space and the storage case, and a part of the heat insulating member may be provided between the cross member and the storage case.

[0011] According to the above configuration, heat from the gas flowing through the exhaust path is prevented from being transmitted from the storage case to the cross member, and thus heat is prevented from being transmitted from the cross member to the passenger space.

[0012] The vehicle according to the present disclosure may further include an electric device disposed between the passenger space and the power storage device. The heat insulating member may include a first heat insulating member disposed between the electric device and a portion of the plurality of wall portions located below the electric device.

[0013] According to the above configuration, it is possible to suppress the heat from the gas flowing through the exhaust path from being transferred from the wall portion to the electric device.

[0014] The vehicle according to the present disclosure may include a pair of front seats and a rear seat arranged in the passenger space, and the heat insulating member may include a second heat insulating member arranged between the pair of front seats and portions of the plurality of wall portions located below the pair of front seats, and a third heat insulating member arranged between the rear seat and portions of the plurality of wall portions located below the rear seat.

[0015] According to the above configuration, it is possible to suppress the heat from the gas flowing through the exhaust path from being transferred from the wall portion to the pair of front and rear seats. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a vehicle that can suppress the transfer of heat to the passenger space when gas is discharged from the power storage device. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic diagram showing a vehicle according to a first embodiment. [Figure 2] 1 is a schematic cross-sectional view showing a state in which an electricity storage device according to a first embodiment is mounted on a vehicle body. [Figure 3] 1 is a schematic exploded perspective view of an electricity storage device according to a first embodiment. [Figure 4] FIG. 10 is a schematic exploded perspective view of an electricity storage device according to a second embodiment. [Figure 5] FIG. 11 is a schematic exploded perspective view of an electricity storage device according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] 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.

[0019] (Embodiment 1) Fig. 1 is a schematic diagram showing a vehicle according to embodiment 1. Fig. 2 is a schematic cross-sectional view showing a state in which an electricity storage device according to embodiment 1 is mounted on a vehicle body. Vehicle 1 according to embodiment 1 will be described with reference to Figs. 1 and 2.

[0020] 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.

[0021] As shown in FIG. 1, a vehicle 1 includes a vehicle body (car body) 2, front wheels 3, rear wheels 4, a power storage device 10, a heat insulating member 40, a pair of front seats 71, a rear seat 72, electrical equipment 73, 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 arranged side by side in the width direction of the vehicle with a gap between them. The rear seat 72 is arranged behind the pair of front seats 71. The rear seat 72 extends in the width direction of the vehicle.

[0022] The power storage device 10 is disposed below the passenger space S. The power storage device 10 is fixed to the vehicle body 2. The power storage device 10 has an upper surface 10a. The upper surface 10a also functions as a floor member that defines the interior of the vehicle. A floor carpet 80 is disposed on the upper surface 10a. The floor carpet 80 may be disposed so as to be located above a cross member 9 (see FIG. 2 ), which will be described later. The electrical device 73 is disposed between the floor carpet 80 and the upper surface 10a on the front side of the vehicle 1. The electrical device 73 is, for example, an in-vehicle ECU. The electrical device 73 is disposed, for example, on the passenger seat side of the pair of front seats 71. The electrical device 73 is disposed near the feet of a passenger sitting on the passenger seat side.

[0023] The heat insulating member 40 prevents heat from the gas from being transmitted to the passenger space S when gas is discharged from inside the electricity storage device 10 as will be described later.

[0024] As shown in FIG. 2 , 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.

[0025] 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.

[0026] 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.

[0027] 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. In the present embodiment, an example is shown in which a part 49 of the heat insulating member 40 is arranged between the cross member 9 and the upper surface 10a, but it is not necessary for a heat insulating member to be arranged between the cross member 9 and the accommodating case 120.

[0028] 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.

[0029] Fig. 3 is a schematic exploded perspective view of the electricity storage device according to Embodiment 1. The detailed structure of the electricity storage device 10 will be described with reference to Figs.

[0030] 2 and 3, the power storage device 10 includes a power storage module 100 and a housing case 120. The power storage module 100 and the heat insulating member 40 are housed in the housing case 20.

[0031] 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 within the accommodation case 120. 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 in 3 rows and 2 columns. Note that the first direction is parallel to, for example, 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 and is parallel to the left-to-right direction of the vehicle 1 in the mounted state. The plurality of power storage stacks 101 are electrically connected in series.

[0032] 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.

[0033] 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.

[0034] The unit cell 110 includes a housing 112, within which one or more electrode assemblies are housed.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] The housing case 120 includes an upper member 300 and a lower case 200. The upper member 300 has, for example, a generally box-like shape that opens downward. The upper member 300 includes a top plate 301 and a peripheral wall 302. The peripheral wall 302 is formed to extend downward from the outer periphery of the top plate 301. The peripheral wall 302 includes end walls 303 and 304 that are aligned in a first direction, and side walls 305 and 306 that are aligned in a second direction.

[0041] External discharge ports 311 to 316 are formed in end wall 303. External discharge ports 321 to 326 are formed in end wall 304. External discharge ports 311 to 316 are through holes that pass through end wall 303, and external discharge ports 321 to 326 are through holes that pass through end wall 304.

[0042] Lower case 200 includes a plurality of wall portions 210, a bottom plate 220, and a sealing member 221. The plurality of wall portions 210 and the sealing member 221 are provided on the upper surface of bottom plate 220. Lower case 200 includes a main body portion 35 and a fixed portion 36. Main body portion 35 is formed by the plurality of wall portions 210 and bottom plate 220. Fixed portions 36 are provided on both side surfaces of main body portion 35 in the second direction.

[0043] The multiple wall portions 210 include a pair of side walls 211A, 211B, a partition wall 212, partition walls 213A, 213B, and partition walls 214A, 214B. The pair of side walls 211A, 211B, the partition wall 212, the partition walls 213A, 213B, and the partition walls 214A, 214B are provided to stand upright from the bottom plate 220. The pair of side walls 211A, 211B, the partition walls 213A, 213B, and the partition walls 214A, 214B extend in a first direction. An exhaust path through which gas discharged from the power storage stack 101 can flow is provided inside the pair of side walls 211A, 211B, the partition walls 213A, 213B, and the partition walls 214A, 214B, as described below.

[0044] The pair of side walls 211A, 211B (first side wall, second side wall) are arranged at an interval in the second direction. The pair of side walls 211A, 211B are arranged on both sides of the bottom plate in the second direction.

[0045] The partition wall 212 is formed on the upper surface of the bottom plate 220 so as to extend in the second direction. The partition wall 212 is disposed so as to pass through the center of the bottom plate 220 in the first direction L1. The partition wall 212 divides the space inside the storage case 120 in the first direction.

[0046] The partition walls 213A, 214A (first partition wall, second partition wall) are arranged in a space on one side in the first direction within the storage case 120, which is partitioned by the partition wall 212. The partition walls 213A, 214A are arranged between the pair of side walls 211A, 211B on one side in the first direction. The partition walls 213A, 214A are arranged apart from the pair of side walls 211A, 211B and are arranged with a gap in the second direction.

[0047] The partition walls 213A and 214A divide the space inside the accommodating case 120, which is located on one side in the first direction of the partition wall 212, in the second direction. Specifically, the partition walls 213A and 214A divide the space inside the accommodating case 120 on one side in the first direction into three in the second direction. In the space inside the accommodating case located on one side in the first direction, the power storage stack 101 is arranged in each of the areas (first area 291, second area 292, third area 293) divided by the pair of side walls 211A and 211B and the partition walls 213A and 214A.

[0048] Partition walls 213B, 214B (third partition wall, fourth partition wall) are arranged in the space on the other side in the first direction within storage case 120, which is partitioned by partition wall 212. Partition walls 213B, 214B are arranged between the pair of side walls 211A, 211B on the other side in the first direction. Partition walls 213B, 214B are arranged apart from the pair of side walls 211A, 211B, and are arranged with a gap in the second direction.

[0049] The partition walls 213B and 214B divide in the second direction the space inside the accommodating case 120 located on the other side in the first direction of the partition wall 212. Specifically, the partition walls 213B and 214B divide the space inside the accommodating case 120 on the other side in the first direction into three in the second direction. In the space inside the accommodating case located on the other side in the first direction, the power storage stack 101 is arranged in each of the regions (fourth region 294, fifth region 295, sixth region 296) partitioned by the pair of side walls 211A and 211B and the partition walls 213B and 214B.

[0050] The side wall 211A is provided with an outlet 275, an outlet 285, and side wall openings 255 and 265. The outlet 275 is provided in an end surface of the side wall 211A located on one side in the first direction. The outlet 285 is provided in an end surface of the side wall 211A located on the other side in the first direction.

[0051] The sidewall opening 255 opens toward the first region 291. Specifically, the sidewall opening 255 opens toward the first region 291 on the partition wall 212 side. An exhaust path 235 (see FIG. 2) is provided inside the sidewall 211A, and the sidewall opening 255 communicates with the exhaust port 275 via the exhaust path 235.

[0052] The sidewall opening 265 opens toward the fourth region 294. Specifically, the sidewall opening 265 opens toward the fourth region 294 on the partition wall 212 side. An exhaust path (not shown) communicating with the sidewall opening 265 is provided inside the sidewall 211A, and the sidewall opening 265 communicates with the exhaust port 285 via the exhaust path.

[0053] Similarly, side wall 211B is provided with exhaust outlet 276, exhaust outlet 286, and side wall openings 256 and 266. Exhaust outlet 276 is provided in an end surface of side wall 211B located on one side in the first direction. Exhaust outlet 286 is provided in an end surface of side wall 211B located on the other side in the first direction.

[0054] The sidewall opening 256 opens toward the third region 293. Specifically, the sidewall opening 256 opens toward the third region 293 on the partition wall 212 side. An exhaust path 236 (see FIG. 2) is provided inside the sidewall 211B, and the sidewall opening 256 communicates with the exhaust port 276 via the exhaust path 236.

[0055] The sidewall opening 266 opens toward the sixth region 296. Specifically, the sidewall opening 266 opens toward the sixth region 296 on the partition wall 212 side. An exhaust path (not shown) communicating with the sidewall opening 266 is provided inside the sidewall 211B, and the sidewall opening 266 communicates with the exhaust port 286 via the exhaust path.

[0056] The partition wall 213A is provided with exhaust ports 271, 272 and openings 251, 252. Furthermore, exhaust paths 231, 232 (see FIG. 2) are provided inside the partition wall 213A. The exhaust ports 271, 272 are provided on an end surface of the partition wall 213A located on one side in the first direction. The exhaust ports 271, 272 are provided side by side in the vertical direction. The exhaust port 272 is located above the exhaust port 271, for example.

[0057] The opening 251 is provided on a side surface of the partition wall 213A located on one side in the second direction. The opening 251 is open toward the first region 291. The opening 251 is in communication with the exhaust port 271 via the exhaust path 231.

[0058] The opening 252 is provided on a side surface of the partition wall 213A located on the other side in the second direction. The opening 252 opens toward the second region 292. The opening 252 communicates with the exhaust port 272 via the exhaust path 232.

[0059] The partition wall 214A is provided with exhaust ports 273, 274 and openings 253, 254. Furthermore, exhaust paths 233, 234 (see FIG. 2) are provided inside the partition wall 214A. The exhaust ports 273, 274 are provided on an end surface of the partition wall 214A located on one side in the first direction. The exhaust ports 273, 274 are arranged side by side in the vertical direction. The exhaust port 274 is located above the exhaust port 273, for example.

[0060] The opening 253 is provided on a side surface of the partition wall 214A located on one side in the second direction. The opening 253 opens toward the second region 292. The opening 253 communicates with the exhaust port 273 via the exhaust path 233.

[0061] The opening 254 is provided on a side surface of the partition wall 214A located on the other side in the second direction. The opening 254 opens toward the third region 293. The opening 254 communicates with the exhaust port 274 via the exhaust path 234.

[0062] The partition wall 213B is provided with exhaust ports 281 and 282 and openings 261 and 262. Similar to the partition wall 213A, two exhaust paths (not shown) are provided inside the partition wall 213B. The exhaust ports 281 and 282 are provided on the end surface of the partition wall 213B located on the other side in the first direction. The exhaust ports 281 and 282 are arranged side by side in the vertical direction. The exhaust port 282 is located above the exhaust port 281, for example.

[0063] The opening 261 is provided on a side surface of the partition wall 213B located on one side in the second direction. The opening 261 opens toward the fourth region 294. The opening 261 communicates with the exhaust port 281 via one of the two exhaust paths described above.

[0064] The opening 262 is provided on a side surface of the partition wall 213B located on the other side in the second direction. The opening 262 opens toward the fifth region 295. The opening 262 communicates with the exhaust port 282 via the other of the two exhaust paths described above.

[0065] The partition wall 214B is provided with exhaust ports 283, 284 and openings 263, 264. Similar to the partition wall 214A, two exhaust paths (not shown) are provided inside the partition wall 214B. The exhaust ports 283, 284 are provided on the end surface of the partition wall 214B located on the other side in the first direction. The exhaust ports 283, 284 are arranged side by side in the vertical direction. The exhaust port 284 is located above the exhaust port 283, for example.

[0066] The opening 263 is provided on a side surface of the partition wall 214B located on one side in the second direction. The opening 263 opens toward the sixth region 296. The opening 263 communicates with the exhaust port 283 via one of the two exhaust paths described above.

[0067] The opening 264 is provided on a side surface of the partition wall 214B located on the other side in the second direction. The opening 264 opens toward the sixth region 296. The opening 264 communicates with the exhaust port 284 via the other of the two exhaust paths described above.

[0068] The external discharge ports 311 to 316 provided in the end wall 303 of the upper member 300 communicate with the above-mentioned discharge ports 271 to 276, respectively. Similarly, the external discharge ports 321 to 326 provided in the end wall 304 of the upper member 300 communicate with the above-mentioned discharge ports 281 to 286, respectively.

[0069] The sealing member 221 seals the gap between the lower portion of the partition wall 212 and the bottom plate 220. The sealing member 221 is provided along a portion of the outer peripheral edge of the lower surface of the partition wall 212 that extends in the second direction. As described below, when gas is generated from at least one of the multiple power storage stacks 101 arranged on one side in the first direction, the sealing member 221 prevents debris and electrolyte discharged together with the gas from moving from the fourth region 294 located on the other side in the first direction to the sixth region 296. Similarly, when gas is generated from at least one of the multiple power storage stacks 101 arranged on the other side in the first direction, the sealing member 221 prevents debris and electrolyte from moving from the first region 291 located on one side in the first direction to the third region 293. This makes it possible to prevent short-circuiting of the power storage stacks 101 arranged in the first direction via the electrolyte or debris.

[0070] The heat insulating member 40 is disposed between the plurality of wall portions 210 and the riding space S. Specifically, the heat insulating member 40 is disposed between the plurality of wall portions 210 and the upper member 300. The heat insulating member 40 includes a first portion 41, a second portion 42, a third portion 43, and a fourth portion 44. The first portion 41, the second portion 42, the third portion 43, and the fourth portion 44 extend along a first direction. The first portion 41, the second portion 42, the third portion 43, and the fourth portion 44 are disposed side by side in the second direction at intervals from one another.

[0071] The first portion 41 is disposed on the upper surface of the side wall 211A. The first portion 41 is located above an exhaust path provided inside the side wall 211A. The second portion 42 is disposed across the upper surfaces of the partition walls 213A and 213B. The second portion 42 is located above an exhaust path provided inside the partition walls 213A and 213B. The third portion 43 is disposed across the upper surfaces of the partition walls 214A and 214B. The third portion 43 is located above an exhaust path provided inside the partition walls 214A and 214B. The fourth portion 44 is disposed on the upper surface of the side wall 211B. The fourth portion 44 is located above an exhaust path provided inside the side wall 211B.

[0072] In the above description, for example, when gas is discharged from the electricity storage stack 101 arranged in the first region 291, the gas is introduced into the opening 251 and the side wall opening 255 that open toward the first region 291. The gas introduced into the opening 251 and the side wall opening 255 passes through the exhaust paths 231, 235 and the exhaust ports 271, 275, and is discharged to the outside of the housing case 120 from the external exhaust ports 311, 315.

[0073] When gas is discharged from the electricity storage stack 101 arranged in the second region 292, the gas is introduced into the openings 252, 253 that open toward the second region 292. The gas introduced into the openings 252, 253 passes through the exhaust paths 232, 233 and the exhaust ports 272, 273, and is discharged to the outside of the housing case 120 from the external exhaust ports 312, 313.

[0074] When gas is discharged from the electricity storage stack 101 arranged in the third region 293, the gas is introduced into the opening 254 and the side wall opening 256 that open toward the third region 293. The gas introduced into the opening 254 and the side wall opening 256 passes through the exhaust paths 234, 236 and the exhaust ports 274, 276, and is discharged to the outside of the housing case 120 from the external exhaust ports 314, 316.

[0075] When gas is discharged from the storage stacks 101 arranged in the fourth area 294 to the sixth area 296, as described above, the gas passes through the exhaust paths provided in the side walls 211A, 211B and the partition walls 213B, 214B, and the exhaust ports 281 to 286, and is discharged to the outside of the storage case 120 through the external exhaust ports 321 to 326.

[0076] As described above, in vehicle 1 according to the present embodiment, when gas of a considerably high temperature is discharged from any one of the plurality of power storage stacks 101, the gas is discharged to the outside of accommodation case 120 through any one of the exhaust paths provided in side walls 211A, 211B and partition walls 213A, 213B, 214A, 214B. Here, as described above, by disposing heat insulating member 40 between passenger space S and the plurality of wall portions 210 (side walls 211A, 211B and partition walls 213A, 213B, 214A, 214B) in which the exhaust paths are provided, it is possible to suppress transfer of heat from the gas flowing through the exhaust path to passenger space S.

[0077] Furthermore, when the insulating member 40 is arranged between the upper member 300 and the plurality of wall portions 210 as described above, the heat from the gas flowing through the exhaust path is prevented from being transferred from each of the plurality of wall portions 210 to the upper member 300, and thus the heat is prevented from being transferred from the upper member 300 to the passenger space S.

[0078] Furthermore, as described above, by arranging a portion of the insulating member 40 between the cross member 9 and the accommodating case 120 (more specifically, the upper member 300), heat from the gas flowing through the exhaust path is prevented from being transmitted from the accommodating case 120 to the cross member 9, and thus heat is prevented from being transmitted from the cross member 9 to the passenger space S.

[0079] (Embodiment 2) 4 is a schematic exploded perspective view of a power storage device according to Embodiment 2. With reference to FIG. 4, a power storage device 10A according to Embodiment 2 will be described.

[0080] 4, when compared with the energy storage device 10 according to the first embodiment, the energy storage device 10A according to the second embodiment differs mainly in the configuration of the accommodating case 120, the number of energy storage stacks 101, and the shape and arrangement of the heat insulating member 40A. The other configurations are substantially the same.

[0081] In a power storage device 10A according to the second embodiment, two power storage stacks 101 are arranged at an interval in a first direction. A lower case 200 has a generally box-like shape that opens upward. An upper member 300 has a generally plate-like shape and closes the opening of the lower case 200.

[0082] Lower case 200 includes a plurality of wall portions 210 and a bottom plate 220. The plurality of wall portions 210 include side walls 211A and 211B, partition walls 215A and 215B, and end wall 211D. Lower case 200 further includes end wall 211C. End wall 211C is provided with external exhaust ports 310A and 310B. Exhaust paths are provided inside these side walls 211A and 211B, partition walls 215A and 215B, and end walls 211D and 211C.

[0083] The side walls 211A, 211B and the end walls 211C, 211D are provided to stand up from the outer edge of the bottom plate 220. The two partition walls 215A, 215B are arranged at an interval in the first direction. The partition wall 215A is located on one side of the partition wall 215B in the first direction. The partition wall 215B is arranged in approximately the center of the bottom plate 220 in the first direction. The partition walls 215A, 215B extend along the second direction. The two partition walls 215A, 215B are arranged on the bottom plate 220 and divide the space inside the storage case 20 into three in the second direction.

[0084] Of the two power storage stacks 101, the power storage stack 101 located on one side in the first direction is disposed in a first region 291 defined by side walls 211A, 211B and two partition walls 215A, 215B.

[0085] Of the two power storage stacks 101, the power storage stack 101 located on the other side in the first direction is disposed in a second region 292 defined by side walls 211A and 211B, partition wall 215B, and end wall 211D.

[0086] The partition wall 215A is provided with a plurality of openings 251A that open toward the first region 291. The partition wall 215B is provided with a plurality of openings 251B that open toward the first region 291 and a plurality of openings 252A that open toward the second region 292. The end wall 211D is provided with a plurality of openings 252B that open toward the second region 292.

[0087] The multiple openings 251A face multiple exhaust valves 111 provided on one end surface of the power storage stack 101 located on one side in the first direction in the first direction. The multiple openings 251B face multiple exhaust valves 111 provided on the other end surface of the power storage stack 101 located on one side in the first direction in the first direction. This allows gas discharged from the exhaust valves 111 to be introduced directly into the partition walls 215A and 215B from the openings 251A and 251B. The gas introduced into the partition walls 215A and 215B passes through an exhaust path and is discharged from the external exhaust ports 310A and 310B.

[0088] The multiple openings 252A face multiple exhaust valves 111 provided on one end surface in the first direction of the power storage stack 101 located on the other side in the first direction. The multiple openings 252B face multiple exhaust valves 111 provided on the other end surface in the first direction of the power storage stack 101 located on the other side in the first direction. This allows gas discharged from the exhaust valves 111 to be introduced directly into the partition wall 215B and the end wall 211D from the openings 252A and 252B. The gas introduced into the partition wall 215B and the end wall 211D passes through an exhaust path and is discharged from the external exhaust ports 310A and 310B.

[0089] The heat insulating member 40A has a generally frame-like shape and is disposed on the upper surfaces of the multiple wall portions 210. The heat insulating member 40A includes a first portion 41A, a second portion 41B, a third portion 41C, a fourth portion 41D, a fifth portion 41E, and a sixth portion 41F.

[0090] The first portion 41A is disposed on the upper surface of the side wall 211A. The first portion 41 is located above an exhaust path provided inside the side wall 211A. The second portion 41B is disposed on the upper surface of the side wall 211B. The second portion 41B is located above an exhaust path provided inside the side wall 211B. The third portion 41C is disposed on the upper surface of the end wall 211C. The third portion 41C is located above an exhaust path provided inside the end wall 211C.

[0091] The fourth portion 41D is disposed on the upper surface of the end wall 211D. The fourth portion 41D is located above an exhaust path provided inside the end wall 211D. The fifth portion 41E is disposed on the upper surface of the partition wall 215A. The fifth portion 41E is located above an exhaust path provided inside the partition wall 215A. The sixth portion 41F is disposed on the upper surface of the partition wall 215B. The sixth portion 41F is located above an exhaust path provided inside the partition wall 215B.

[0092] Even when configured as described above, a vehicle equipped with power storage device 10A according to the second embodiment can achieve substantially the same effects as vehicle 1 according to the first embodiment.

[0093] (Embodiment 3) 5 is a schematic exploded perspective view of a power storage device according to embodiment 3. With reference to FIG. 5, a power storage device 10B according to embodiment 3 will be described.

[0094] Energy storage device 10B according to embodiment 3 differs from energy storage device 10 according to embodiment 1 mainly in the configuration of casing 120, the number of energy storage stacks 101, and the shape and arrangement of heat insulating members 40B. The other configurations are substantially the same.

[0095] In the energy storage device 10B according to the third embodiment, the interior of the accommodating case 120 is partitioned into five regions by four partition walls 215, and five energy storage stacks 101 are arranged at intervals in the second direction. The five energy storage stacks 101 are arranged in the five regions partitioned by a pair of side walls 211A, 211B, a plurality of partition walls 215, and a pair of end walls 211C, 211D. The number of energy storage stacks 101 is not limited to five, and may be one, or two or more. The number of partition walls 215 can be set appropriately depending on the number of energy storage stacks 101. The energy storage stacks 101 may be arranged in a matrix.

[0096] In each power storage stack 101, the multiple power storage stacks 101 are arranged in the second direction so that the first end faces 110a of the multiple unit cells 110 included in that power storage stack 101 face the other side in the first direction. That is, in each power storage stack 101, all of the multiple exhaust valves 111 face the other side in the first direction. The multiple exhaust valves 111 are lined up in the second direction while being alternately shifted in the vertical direction.

[0097] Each partition wall 215 has a plurality of openings 25h1, 25h2 that open toward a region located on one side of the partition wall in the first direction. The end wall 211D also has a plurality of openings 25h1, 25h2 that open toward a region located on one side of the end wall 211D in the first direction. The openings 25h1, 25h2 are aligned in the second direction while being alternately shifted vertically. The openings 25h1, 25h2 face the exhaust valves 111 included in the power storage stack 101 located on one side of the first direction. This allows gas discharged from the exhaust valves 111 to be directly introduced into the partition wall 215 or the end wall 211D through the openings 25h1, 25h2. The gas introduced into the partition wall 215 or the end wall 211D is exhausted through an exhaust path and discharged from the external exhaust ports 310A, 310B.

[0098] The heat insulating member 40B includes a first heat insulating member 45, a second heat insulating member 46, and a third heat insulating member 47.

[0099] The first heat insulating member 45 is disposed between the electric device 73 (see FIG. 1) and a portion of the plurality of wall portions 210 located below the electric device 73. More specifically, the first heat insulating member 45 is disposed between the upper member 300 and a portion of the plurality of wall portions 210 located below the electric device 73 (see FIG. 1). The first heat insulating member 45 has a substantially U-shape.

[0100] In this embodiment, the electrical device 73 is described as an in-vehicle ECU located near the feet of a passenger sitting on the passenger seat, but the location of the electronic device 73 is not limited to the above and may be located near the feet of a passenger sitting in the driver's seat.

[0101] The electrical equipment 73 may also include a car navigation system. In this case, the car navigation system is disposed on the front side (one side in the first direction) between the pair of front seats 71. The first heat insulating member 45 may be disposed between the car navigation system and a portion of the plurality of wall portions 210 that is located below the car navigation system.

[0102] The second heat insulating member 46 is disposed between the pair of front seats 71 (see FIG. 1 ) and portions of the plurality of wall portions 210 that are located below the pair of front seats 71. More specifically, the second heat insulating member 46 is disposed between the upper member 300 and portions of the plurality of wall portions 210 that are located below the pair of front seats 71.

[0103] The second insulating member 46 includes a first portion 46A located below one of the pair of front seats 71 and a second portion 46B located below the other of the pair of front seats 71. The first portion 46A and the second portion 46B have a generally U-shape. The first portion 46A and the second portion 46B are arranged independently of each other. The first portion 46A and the second portion 46B are arranged spaced apart in the second direction so that the openings of the U-shapes face each other.

[0104] The third heat insulating member 47 is disposed between the rear seat 72 and a portion of the plurality of wall portions 210 that is located below the rear seat 72 (see FIG. 1). More specifically, the third heat insulating member 47 is disposed between the upper member 300 and a portion of the plurality of wall portions 210 that is located below the rear seat 72. The third heat insulating member 47 has a generally frame-like shape. The third heat insulating member 47 is disposed on an upper surface of the end wall 211D, an upper surface of the partition wall 215 that is closest to the end wall 211D, and an upper surface of a portion of the pair of side walls 211A, 211B that connects the end wall 211D to the partition wall 215 that is closest to the end wall 211D.

[0105] Even when configured as described above, a vehicle equipped with power storage device 10B according to embodiment 3 can achieve substantially the same effects as vehicle 1 according to embodiment 1. Furthermore, by providing heat insulating member 40B with first heat insulating member 45, it is possible to prevent heat from the gas flowing through the exhaust path from being transferred from wall portion 210 to electrical equipment 73. In addition, by providing heat insulating member 40B with second heat insulating member 46 and third heat insulating member 47, it is possible to prevent heat from the gas flowing through the exhaust path from being transferred from wall portion 210 to the pair of front seats 71 and rear seat 72.

[0106] In the above-described first to third embodiments, the first direction is parallel to the longitudinal direction of the vehicle and the second direction is parallel to the width direction of the vehicle in the mounted state, but the present invention is not limited to this. In the mounted state, the first direction may be parallel to the width direction of the vehicle and the second direction may be parallel to the longitudinal direction of the vehicle.

[0107] 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]

[0108] 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, 10B power storage device, 10a upper surface, 25h1, 25h2 opening, 35 main body portion, 36 fixed portion, 40, 40A, 40B heat insulating member, 41, 41A first portion, 41B second portion, 41C third portion, 41D fourth portion, 41E fifth portion, 41F sixth portion, 42 second portion, 43 third portion, 44 fourth portion, 45 first heat insulating member, 46 second heat insulating member, 46A first portion, 46B second portion, 47 third heat insulating member, 49 part of heat insulating member, 71 front seat, 72 rear seat, 73 electrical equipment, 80 floor carpet, 100 power storage module, 101 Energy storage stack, 110 unit cell, 110a first end surface, 110b second end surface, 111 exhaust valve, 112 housing, 120 storage case, 200 lower case, 210 wall portion, 211A, 211B side wall, 211C, 211D end wall, 212 partition wall, 213A, 213B, 214A, 214B, 215, 215A, 215B partition wall, 220 bottom plate, 221 sealing member, 231, 232, 233, 234, 235, 236 exhaust path, 251, 251A, 251B, 252, 252A, 252B, 253, 254 opening, 255, 256 side wall opening, 261, 262, 263, 264 Opening, 265,266 Side wall opening, 271,272,273,274,275,276 Outlet, 281,282,283,284,286 Outlet, 291 1st area, 292 2nd area, 293 3rd area, 294 4th area, 295 5th area, 296 6th area, 300 Upper member, 301 Top plate, 302 Peripheral wall, 303,304 End wall, 305,306 Side wall, 310A,310B,311,312,313,314,315,316,321,326 External discharge port, S passenger space.

Claims

1. A car body with a passenger space, an electricity storage device disposed below the passenger space, the power storage device includes one or more power storage stacks and a housing case that houses the one or more power storage stacks, the storage case includes a lower case in which the one or more power storage stacks are arranged, and a plurality of wall portions that define an area in which the one or more power storage stacks are arranged, an exhaust path through which gas discharged from the one or more power storage stacks can flow is provided inside the plurality of wall portions; A vehicle, wherein a heat insulating member is arranged between the plurality of wall portions and the passenger space.

2. the storage case has an upper member that seals the opening of the lower case, The vehicle according to claim 1 , wherein the heat insulating member is disposed between each of the plurality of wall portions and the upper member.

3. a cross member constituting a part of the frame of the vehicle body is disposed between the riding space and the storage case; The vehicle according to claim 1 or 2, wherein a portion of the heat insulating member is disposed between the cross member and the storage case.

4. The vehicle further includes an electric device disposed between the passenger space and the power storage device, The vehicle according to claim 1 or 2, wherein the heat insulating member includes a first heat insulating member disposed between the electric equipment and a portion of the plurality of wall portions that is located below the electric equipment.

5. A pair of front seats and a rear seat are arranged in the passenger space, 5. The vehicle of claim 4, wherein the insulating member includes a second insulating member arranged between the pair of front seats and a portion of the plurality of wall portions located below the pair of front seats, and a third insulating member arranged between the rear seats and a portion of the plurality of wall portions located below the rear seats.

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