Vehicle

Abstract

Provided is a vehicle capable of suppressing heat transfer to a passenger compartment when gas is discharged from a power storage device. 【Solution means】The vehicle 1 includes a vehicle body 2 provided with a passenger compartment S, and a power storage device 10 disposed below the passenger compartment 2. The power storage device 10 includes one or more power storage stacks 101 and a housing case 120 that houses the one or more power storage stacks 101. The housing 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 partition an area in which the one or more power storage stacks 101 are disposed. An exhaust path through which gas discharged from the one or more power storage stacks 101 can flow is provided inside the plurality of wall portions 210, and a heat insulating member 40 is disposed between the plurality of wall portions 210 and the passenger compartment.

Description

Technical Field

[0001] The present disclosure relates to a vehicle, and more particularly to a vehicle equipped with a power storage device.

Background Art

[0002] As a conventional power storage device, International Publication No. 2020 / 134054 (Patent Document 1) discloses a structure in which a part of a housing case for housing a plurality of power storage stacks is constituted by a hollow member, and the hollow portion of the hollow member is used as an exhaust path for gas generated from the power storage stacks.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the gas generated from the power storage stack has a considerably high temperature. When the power storage device described in Patent Document 1 is mounted on a vehicle without any measures, there is a concern that heat will be transferred from the portion of the housing case that constitutes the exhaust path to the passenger space.

[0005] The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a vehicle capable of suppressing heat transfer to the passenger space when gas is discharged from the power storage device.

Means for Solving the Problems

[0006] A vehicle based on the present disclosure includes a vehicle body provided with a passenger space, and a power 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 housing case has a lower case in which the one or more power storage stacks are disposed, and a plurality of wall portions that partition a region in which the one or more power storage stacks are disposed. 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 heat insulating member is disposed between the plurality of wall portions and the passenger space.

[0007] According to the above configuration, since the heat insulating member is disposed between each of the plurality of wall portions constituting the exhaust path and the passenger space, even if the gas discharged from the power storage stack flows through the wall portion, heat transfer from the wall portion to the passenger space can be suppressed.

[0008] In the vehicle based on the present disclosure, the housing case may have an upper member that seals an opening of the lower case. 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 transfer from the gas flowing through the exhaust path to each of the plurality of wall portions and then to the upper member can be suppressed, and thus heat transfer from the upper member to the passenger space can be suppressed.

[0010] In the vehicle based on the present disclosure, a cross member that forms a part of the framework of the vehicle body may be disposed between the passenger space and the housing case. A part of the heat insulating member may be provided between the cross member and the housing case.

[0011] According to the above configuration, heat transfer from the gas flowing through the exhaust path to the cross member from the housing case can be suppressed, and thus heat transfer from the cross member to the passenger space can be suppressed.

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

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

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

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

Effect of the Invention

[0016] According to the present disclosure, it is possible to provide a vehicle capable of suppressing heat transfer to the passenger space when gas is discharged from the power storage device.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Best Mode for Carrying Out the Invention

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments shown 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 view showing a vehicle according to Embodiment 1. FIG. 2 is a schematic cross-sectional view showing a state in which a power storage device according to Embodiment 1 is mounted on a vehicle body. With reference to FIGS. 1 and 2, the vehicle 1 according to Embodiment 1 will be described.

[0020] The vehicle 1 is a hybrid vehicle capable of traveling using the power of at least one of a motor and an engine, or an electric vehicle that travels using a driving force obtained from electric energy.

[0021] As shown in FIG. 1, the 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, an electric device 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. In the passenger space S, a pair of front seats 71 and a rear seat 72 are arranged. The pair of front seats 71 are arranged side by side in the width direction of the vehicle with a space therebetween. 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 riding 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 vehicle interior. The 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) 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 among a pair of front seats 71. The electrical device 73 is disposed near the feet of the passenger sitting on the passenger seat side.

[0023] As will be described later, when gas is discharged inside the power storage device 10, the heat insulating member 40 suppresses the heat from the gas from being transmitted to the riding space S.

[0024] As shown in FIG. 2, the vehicle body 2 includes a skeletal member 5. The skeletal 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 inside the pair of side sills 7 with a distance therebetween. The pair of side members 6 and the pair of side sills 7 extend along the longitudinal direction of the vehicle 1.

[0025] The pair of side members 6 are spaced apart in the width direction of the vehicle 1. The main body portion 35 of the power storage device 10 is disposed in the gap between the pair of side members 6. A gap is provided between the main body portion 35 and the pair of side members 6. Thereby, even when the vehicle 1 is side-collided, it is possible to suppress an impact from being input to the power storage device 10.

[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 the cross member 9. The cross member 9 is provided so as to span from one side sill 7 to the other side sill 7 above the power storage device 10. The power storage device 10 is fastened and fixed to the cross member 9. In the present embodiment, an example is illustrated in which a part 49 of the heat insulating member 40 is disposed between the cross member 9 and the upper surface 10a, but a heat insulating member may not be disposed between the cross member 9 and the housing case 120.

[0028] In the above description, the case where the framework member 5 includes the pair of side members 6 and the pair of side sills 7 has been illustrated and described, but it is not limited thereto. The pair of side sills 7 may also have the functions of 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 power storage device according to Embodiment 1. With reference to FIGS. 2 and 3 described above, the detailed structure of the power storage device 10 will be described.

[0030] As shown in FIGS. 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 in the housing 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 three rows and two columns. Note that the first direction is parallel to, for example, the front-rear direction of the vehicle 1 in the mounted state where the power storage device 10 is mounted on the vehicle body 2. The second direction is orthogonal to the first direction and is parallel to the left-right direction of the vehicle 1 in the above-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 a 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. The unit cell 110 has a flat rectangular parallelepiped shape with a thickness in the second direction.

[0034] The unit cell 110 includes a housing 112, and one or more electrode bodies are accommodated inside the housing 112.

[0035] When a single electrode body is accommodated 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 a wound electrode body in which a negative electrode sheet, a separator, and a positive electrode sheet are wound.

[0036] When a plurality of electrode bodies are accommodated in the housing 112, the plurality of electrode bodies are arranged side by side in the longitudinal direction and are connected in series. Also in this case, the electrode body may be a laminated electrode body or a wound electrode body.

[0037] The unit cell 110 is a secondary battery such as a nickel-hydrogen battery or a lithium-ion battery. The unit cell 110 may use a liquid electrolyte or a solid electrolyte. The unit cell 110 may be a rechargeable capacitor.

[0038] The housing 112 is formed of a metal material such as aluminum, for example. The housing 112 includes a first end face 110a and a second end face 110b arranged in the 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, and discharges the gas inside the housing 112 to the outside of the housing 112.

[0039] In each power storage stack 101, a plurality of unit cells 110 are arranged in a second direction such that exhaust valves 111 are alternately positioned on one side and the other side in a first direction. That is, the plurality of 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 one side 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 substantially box-shaped configuration 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 peripheral edge of the top plate 301. The peripheral wall 302 includes end walls 303 and 304 arranged in the first direction and side walls 305 and 306 arranged in the second direction.

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

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

[0043] The plurality of wall portions 210 includes a pair of side walls 211A and 211B, a partition wall 212, partition walls 213A and 213B, and partition walls 214A and 214B. The pair of side walls 211A and 211B, the partition wall 212, the partition walls 213A and 213B, and the partition walls 214A and 214B are provided so as to stand up from the bottom plate 220. The pair of side walls 211A and 211B, the partition walls 213A and 213B, and the partition walls 214A and 214B extend in the first direction. Inside the pair of side walls 211A and 211B, the partition walls 213A and 213B, and the partition walls 214A and 214B, an exhaust path through which the gas discharged from the power storage stack 101 described later can flow is provided.

[0044] The pair of side walls 211A and 211B (the first side wall and the second side wall) are arranged at intervals in the second direction. The pair of side walls 211A and 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 arranged so as to pass through the central portion of the bottom plate 220 in the first direction L1. The partition wall 212 divides the space in the housing case 120 in the first direction.

[0046] The partition walls 213A and 214A (the first partition wall and the second partition wall) are arranged in the space on one side in the first direction in the housing case 120 partitioned by the partition wall 212. The partition walls 213A and 214A are arranged between the pair of side walls 211A and 211B on one side in the first direction. The partition walls 213A and 214A are arranged away from the pair of side walls 211A and 211B and are arranged at intervals in the second direction.

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

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

[0049] The partition walls 213B and 214B divide the space within the housing case 120, which is located on the other side of the partition wall 212 in the first direction, in the second direction. Specifically, the partition walls 213B and 214B divide the space on the other side of the housing case 120 in the first direction into three parts in the second direction. In the space within the housing case located on the other side of the first direction, the power storage stack 101 is arranged in each region (the fourth region 294, the fifth region 295, and the 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 a discharge port 275, a discharge port 285, and side wall openings 255 and 265. The discharge port 275 is provided at the end face of the side wall 211A located on one side of the first direction. The discharge port 285 is provided at the end face of the side wall 211A located on the other side of the first direction.

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

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

[0053] Similarly, the side wall 211B is provided with a discharge port 276, a discharge port 286, and side wall openings 256 and 266. The discharge port 276 is provided at the end face of the side wall 211B located on one side in the first direction. The discharge port 286 is provided at the end face of the side wall 211B located on the other side in the first direction.

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

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

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

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

[0058] The opening 252 is provided on the 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 discharge port 272 via the exhaust path 232.

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

[0060] The opening 253 is provided on the 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 discharge port 273 via the exhaust path 233.

[0061] The opening 254 is provided on the 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 discharge port 274 via the exhaust path 234.

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

[0063] The opening 261 is provided on the 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 discharge port 281 through one of the two exhaust paths described above.

[0064] The opening 262 is provided on the 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 discharge port 282 through the other of the two exhaust paths described above.

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

[0066] The opening 263 is provided on the 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 discharge port 283 through one of the two exhaust paths described above.

[0067] The opening 264 is provided on the 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 discharge port 284 via the other exhaust path among the above-described two exhaust paths.

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

[0069] The seal member 221 seals the gap between the lower part of the partition wall 212 and the bottom plate 220. The seal 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. When gas is generated from at least any one of the plurality of power storage stacks 101 arranged on one side in the first direction as described later, the debris and electrolyte discharged together with the gas are prevented from going from the fourth region 294 located on the other side in the first direction to the sixth region 296. Also, when gas is generated from at least any one of the plurality of power storage slacks 101 arranged on the other side in the first direction, similarly, debris and electrolyte are prevented from going from the first region 291 located on one side in the first direction to the third region 293. Thereby, it is possible to prevent the power storage stacks 101 arranged in the first direction from short-circuiting via the electrolyte or debris.

[0070] The heat insulating member 40 is arranged between the plurality of wall portions 210 and the passenger space S. Specifically, the heat insulating member 40 is arranged 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 the first direction. The first portion 41, the second portion 42, the third portion 43, and the fourth portion 44 are arranged side by side in the second direction with intervals therebetween.

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

[0072] In the above, for example, when gas is discharged from the power storage stack 101 disposed 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 is discharged to the outside of the housing case 120 from the external discharge ports 311 and 315 through the exhaust paths 231, 235 and the discharge ports 271, 275.

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

[0074] When gas is discharged from the power storage stack 101 disposed 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 is discharged to the outside of the housing case 120 from the external discharge ports 314 and 316 through the exhaust paths 234, 236 and the discharge ports 274, 276.

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

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

[0077] Further, when the heat insulating member 40 is disposed between the upper member 300 and the plurality of wall portions 210 as described above, heat from the gas flowing through the exhaust path can be suppressed from being transmitted from each of the plurality of wall portions 210 to the upper member 300, and thus heat can be suppressed from being transmitted from the upper member 300 to the passenger space S.

[0078] Furthermore, as described above, by disposing a part of the heat insulating member 40 between the cross member 9 and the housing case 120 (more specifically, the upper member 300), heat from the gas flowing through the exhaust path can be suppressed from being transmitted from the housing case 120 to the cross member 9, and thus heat can be suppressed from being transmitted from the cross member 9 to the passenger space S.

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

[0080] As shown in FIG. 4, when the power storage device 10A according to Embodiment 2 is compared with the power storage device 10 according to Embodiment 1, the configuration of the housing case 120, the number of power storage stacks 101, and the shape and arrangement of the heat insulating member 40A are mainly different. Other configurations are substantially the same.

[0081] In the power storage device 10A according to Embodiment 2, two power storage stacks 101 are arranged at intervals in the first direction. The lower case 200 has a substantially box-shaped shape that opens upward. The upper member 300 has a substantially plate-like shape and closes the opening of the lower case 200.

[0082] The 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, 211B, partition walls 215A, 215B, and end walls 211D. The lower case 200 further includes an end wall 211C. External discharge ports 310A, 310B are provided in the end wall 211C. An exhaust path is provided inside these side walls 211A, 211B, partition walls 215A, 215B, and end walls 211D, 211C.

[0083] The side walls 211A, 211B, and end walls 211C, 211D are provided so as to stand up from the outer edge portion of the bottom plate 220. The two partition walls 215A, 215B are arranged at intervals in the first direction. The partition wall 215A is located on one side in the first direction with respect to the partition wall 215B. The partition wall 215B is arranged at a substantially central portion 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 partition the space in the housing case 20 into three in the second direction.

[0084] One of the two power storage stacks 101 located on one side in the first direction is arranged in a first region 291 partitioned by the side walls 211A, 211B, and the 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 partitioned by side walls 211A, 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 plurality of openings 251A face a plurality of exhaust valves 111 provided on the end face on one side in the first direction of the power storage stack 101 located on one side in the first direction. The plurality of openings 251B face a plurality of exhaust valves 111 provided on the end face on the other side in the first direction of the power storage stack 101 located on one side in the first direction. Thereby, the gas discharged from the exhaust valve 111 can be directly introduced into the partition walls 215A and 215B through the openings 251A and 251B. The gas introduced into the partition walls 215A and 215B is discharged from the external discharge ports 310A and 310B through the exhaust path.

[0088] The plurality of openings 252A face a plurality of exhaust valves 111 provided on the end face on one side in the first direction of the power storage stack 101 located on the other side in the first direction. The plurality of openings 252B face a plurality of exhaust valves 111 provided on the end face on the other side in the first direction of the power storage stack 101 located on the other side in the first direction. Thereby, the gas discharged from the exhaust valve 111 can be directly introduced into the partition wall 215B and the end wall 211D through the openings 252A and 252B. The gas introduced into the partition wall 215B and the end wall 211D is discharged from the external discharge ports 310A and 310B through the exhaust path.

[0089] The heat insulation member 40A has a substantially frame-like shape and is disposed on the upper surfaces of the plurality of wall portions 210. The heat insulation 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 the exhaust passage 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 the exhaust passage 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 the exhaust passage 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 the exhaust passage 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 the exhaust passage 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 the exhaust passage provided inside the partition wall 215B.

[0092] Even in the case configured as described above, in a vehicle equipped with the power storage device 10A according to Embodiment 2, effects substantially the same as those of the vehicle 1 according to Embodiment 1 can be obtained.

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

[0094] When the power storage device 10B according to Embodiment 3 is compared with the power storage device 10 according to Embodiment 1, the configuration of the housing case 120, the number of power storage stacks 101, and the shape and arrangement of the heat insulation member 40B are mainly different. Other configurations are substantially the same.

[0095] In the power storage device 10B according to Embodiment 3, the inside of the housing case 120 is partitioned into five regions by four partition walls 215, and five power storage stacks 101 are arranged at intervals in the second direction. The five power storage stacks 101 are respectively arranged in five regions partitioned by a pair of side walls 211A and 211B, a plurality of partition walls 215, and a pair of end walls 211C and 211D. Note that the number of the power storage stacks 101 is not limited to five, and may be a single one or two or more. The number of the partition walls 215 can be appropriately set according to the number of the power storage stacks 101. Note that the power storage stacks 101 may be arranged in a matrix.

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

[0097] Each partition wall 215 is provided with a plurality of openings 25h1 and 25h2 that open toward the region located on one side in the first direction with respect to each partition wall. Also, in the end wall 211D, a plurality of openings 25h1 and 25h2 that open toward the region located on one side in the first direction with respect to the end wall 211D are provided. The plurality of openings 25h1 and 25h2 are arranged side by side in the second direction in a state of being alternately shifted in the vertical direction. The plurality of openings 25h1 and 25h2 face the plurality of exhaust valves 111 included in the power storage stack 101 located on one side in the first direction. Thereby, the gas discharged from the exhaust valve 111 can be directly introduced into the partition wall 215 or the end wall 211D from the openings 25h1 and 25h2. The gas introduced into the partition wall 215 and the end wall 211D is discharged from the external discharge ports 310A and 310B through the exhaust path.

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

[0100] In the present embodiment, the electrical device 73 is exemplified as an in-vehicle ECU disposed near the feet of an occupant sitting on the passenger seat side. However, the arrangement of the electronic device 73 is not limited to the above, and it may be disposed near the feet of an occupant sitting on the driver's seat.

[0101] Further, the electrical device 73 may 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 a portion of the plurality of wall portions 210 that is located below the car navigation system and the car navigation system.

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

[0103] The second heat 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 substantially U-shaped configuration. The first portion 46A and the second portion 46B are disposed independently of each other. The first portion 46A and the second portion 46B are disposed at intervals in the second direction such that the openings of the U-shaped configurations face each other.

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

[0105] Even in such a configuration, in the vehicle equipped with the power storage device 10B according to the third embodiment, substantially the same effects as those of the vehicle 1 according to the first embodiment can be obtained. Further, since the heat insulating member 40B includes the first heat insulating member 45, heat from the gas flowing through the exhaust path can be suppressed from being transmitted from the wall portion 210 to the electric device 73. In addition, since the heat insulating member 40B includes the second heat insulating member 46 and the third heat insulating member 47, heat from the gas flowing through the exhaust path can be suppressed from being transmitted from the wall portion 210 to the pair of front seats 71 and the rear seat 72.

[0106] In the above-described first to third embodiments, the case where 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 has been illustrated and described as an example, but the present invention is not limited thereto. 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 this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims, and all modifications within the meaning and scope equivalent to the claims are included.

Explanation of Reference Numerals

[0108] 1 Vehicle, 2 Vehicle body, 3 Front wheel, 4 Rear wheel, 5 Skeletal 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 Body part, 36 Fixed part, 40, 40A, 40B Heat insulating member, 41, 41A First part, 41B Second part, 41C Third part, 41D Fourth part, 41E Fifth part, 41F Sixth part, 42 Second part, 43 Third part, 44 Fourth part, 45 First heat insulating member, 46 Second heat insulating member, 46A First part, 46B Second part, 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 Power storage stack, 110 Unit cell, 110a First end face, 110b Second end face, 111 Exhaust valve, 112 Housing, 120 Storage case, 200 Lower case, 210 Wall part, 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 First region, 292 Second region, 293 Third region, 294 Fourth region, 295 Fifth region, 296 Sixth region, 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 outlet, S Riding space.

Claims

【Claim 1】 A vehicle body provided with a passenger space, a power storage device disposed below the passenger space, and a heat insulating member, wherein the vehicle body includes a cross member disposed between the passenger space and the power storage device and forming a part of the framework of the vehicle body, a floor carpet is disposed so as to cover the cross member, the passenger space is located above the floor carpet, the power storage device includes a plurality of power storage stacks each including a plurality of cells, and a lower member and an upper member for accommodating the plurality of power storage stacks, each of the plurality of cells includes an exhaust valve, in the plurality of cells, cells having the exhaust valve provided on the front side of the vehicle and cells having the exhaust valve provided on the rear side of the vehicle are alternately arranged, the lower member has a bottom plate member on which the plurality of power storage stacks are disposed, a plurality of first wall portions provided at the peripheral edge of the bottom plate member, and a second wall portion that partitions the region where the plurality of power storage stacks are disposed in the region surrounded by the plurality of first wall portions and extends in the vehicle width direction, an opening that opens upward is formed in the lower member, the upper member closes the opening, the second wall portion is provided with a hollow portion extending in the vehicle width direction and a plurality of holes communicating with the hollow portion and arranged in the vehicle width direction, a part of the heat insulating member is disposed above the hollow portion and between the cross member and the upper surface of the upper member.

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