Power storage device and vehicle

Abstract

To provide a power storage device which suppresses damage to electric equipment when impact force is applied to a vehicle.SOLUTION: A power storage device 1 is disposed in a lower part of a vehicle and comprises a power storage stack 42 housed in a storage case 30, electric equipment 40, and a connection member 32 provided in the storage case. When a direction from the power storage stack to the electric equipment is defined as a first direction L1, and the opposite direction is defined as a second direction L2, a fixing base material 50 included in the storage case is made up of a first portion and a second portion, which is located adjacent to the first portion in the second direction and has lower bending rigidity than the first portion. The electric equipment is fixed to the first portion. The connection member includes a first connection portion 36 connected to the first portion, a second connection portion 35 that is located on the first direction side and above the first connection portion, and is connected to the vehicle, and a main body portion 37 positioned between the first and second connection portions. The main body portion includes a section that extends upward with an increasing distance from the first connection portion toward the second connection portion.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a power storage device and a vehicle.

Background Art

[0002] Conventionally, various proposals have been made for power storage devices arranged on the lower surface side of vehicles. For example, the battery pack described in Japanese Unexamined Patent Application Publication No. 2022-128961 is arranged on the lower surface of the floor panel of the vehicle. Electric devices such as a high-voltage junction box and an ECU (Electronic Control Unit) are housed in this battery pack.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the power storage device configured as described above, when the vehicle is mounted, an impact force may be applied to the vehicle.

[0005] At this time, the impact force is transmitted to the power storage device, and there is a risk that the electric devices in the power storage device will be severely damaged.

[0006] The present disclosure has been made in view of the above problems, and an object thereof is to provide a power storage device mounted on a vehicle, in which damage to electric devices is suppressed when an impact force is applied to the vehicle.

Means for Solving the Problems

[0007] The power storage device according to the present disclosure is a power storage device disposed below a vehicle, and includes a housing case, a power storage stack housed in the housing case, an electrical device housed in the housing case, and a connecting member provided on the housing case. When the direction from the power storage stack toward the electrical device is defined as the first direction and the direction opposite to the first direction is defined as the second direction, the housing case includes a fixed base material, and the fixed base material includes a first portion and a second portion provided at a position adjacent to the first portion in the second direction and having a lower bending rigidity than the first portion. The electrical device is fixed to the first portion, and the connecting member includes a first connection portion connected to the first portion, a second connection portion located on the first direction side of the first connection portion and above the first connection portion and connected to the vehicle, and a main body portion located between the first connection portion and the second connection portion. The main body portion includes a portion extending upward as it goes from the first connection portion side to the second connection portion side.

[0008] The power storage device according to the present disclosure is a power storage device disposed below a vehicle, and includes a housing case, a power storage stack housed in the housing case, an electrical device housed in the housing case, and a connecting member provided on the housing case. When the direction from the power storage stack toward the electrical device is defined as the first direction and the direction opposite to the first direction is defined as the second direction, the housing case includes a fixed base material, and the fixed base material includes a first portion and a second portion adjacent to the first portion in the second direction. The first portion includes a reinforcing portion. The electrical device is fixed to the first portion, and the connecting member includes a first connection portion fixed to the first portion, a second connection portion located in front of the vehicle and above the first connection portion with respect to the first connection portion and fixed to the vehicle, and a main body portion located between the first connection portion and the second connection portion. The main body portion includes a portion extending upward as it goes from the first connection portion side to the second connection portion side.

Advantages of the Invention

[0009] According to the power storage device of the present disclosure, in the case of a power storage device mounted on a vehicle, it is possible to suppress damage to the electrical device when an impact force is applied to the vehicle.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

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Figure 6

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Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

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Figure 17

Figure 18

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Figure 20

Figure 21

Figure 22

Figure 23

Figure 24

Figure 25

Embodiments for Carrying Out the Invention

[0011] Embodiments of the present disclosure will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are given the same numbers. (Embodiment 1) The power storage device 1 according to Embodiment 1 will be described with reference to FIG. 1 and the like. FIG. 1 is a diagram schematically showing a vehicle 2 on which the power storage device 1 is mounted.

[0012] The vehicle 2 includes a power storage device 1, a vehicle skeleton 10, a drive device 11, an exhaust pipe 12, a charging unit 20, and a fuel tank 21. The vehicle skeleton 10 defines a housing space 13 in which the drive device 11 is housed and a passenger compartment space 14 in which passengers board. The housing space 13 is formed on the front direction L1 side of the passenger compartment space 14.

[0013] The drive device 11 includes an engine 15, motor generators 16, 17, and a PCU 18.

[0014] The engine 15 generates a driving force for driving the drive wheels 19 by burning fuel supplied from the fuel tank 21. The exhaust pipe 12 is connected to the engine 15.

[0015] The PCU 18 includes an inverter and a converter. The PCU 18 converts, for example, the DC power supplied from the power storage device 1 into AC power and supplies it to the motor generator 16. The motor generator 16 generates a driving force for rotating the drive wheels 19 with the power supplied from the PCU 18. Note that the motor generator 17 mainly functions as a generator.

[0016] The charging unit 20 is formed such that a charging plug of an externally provided charging stand can be connected thereto. The power storage device 1 is formed to be chargeable with the power supplied from the charging plug connected to the charging unit 20.

[0017] In this embodiment, the vehicle 2 is a so-called plug-in hybrid vehicle, but the vehicle 2 may be a hybrid vehicle or an electric vehicle.

[0018] FIG. 2 is a bottom view showing the bottom of the vehicle 2. In FIG. 2 and the like, “L0” indicates the front-rear direction of the vehicle 2, “L1” indicates the front direction of the vehicle 2, and “L2” indicates the rear direction L2 of the vehicle 2. “W0” indicates the vehicle width direction, “W1” indicates the right vehicle width direction of the vehicle 2, and “W2” indicates the left vehicle width direction of the vehicle 2.

[0019] The vehicle skeleton 10 includes a left side rocker 4 and a right side rocker 5, a floor panel 6, a left front side member 7 and a right front side member 8, and a suspension member 9.

[0020] The bottom of the vehicle skeleton 10 is formed by the left side rocker 4 and the right side rocker 5, the floor panel 6, the left front side member 7 and the right front side member 8, and the suspension member 9.

[0021] The left side locker 4 and the right side locker 5 are arranged at intervals in the vehicle width direction W0 of the vehicle 2, and the left side locker 4 and the right side locker 5 are formed to extend in the front-rear direction L0. The floor panel 6 is disposed on the upper surfaces of the left side locker 4 and the right side locker 5.

[0022] The floor panel 6, the left front side member 7, and the right front side member 8 are located on the lower side of the accommodation space 13, and the left front side member 7 and the right front side member 8 are arranged at intervals in the vehicle width direction W0. The left front side member 7 is connected to the front end portion of the left side locker 4, and the right front side member 8 is connected to the front end portion of the right side locker 5.

[0023] The suspension member 9 is disposed below the accommodation space 13 and is connected to the left front side member 7, the right front side member 8, and the like. On the upper surface of the suspension member 9, a drive device 11 and the like are arranged.

[0024] The fuel tank 21 is fixed to the bottom of the vehicle skeleton 10, and the fuel tank 21 is arranged on the rear side of the bottom. The power storage device 1 is fixed to the bottom of the vehicle skeleton 10. The power storage device 1 is arranged in the front direction L1 with respect to the fuel tank 21. The power storage device 1 is arranged so as to be shifted to the left width direction W2 side in the vehicle width direction W0.

[0025] The exhaust pipe 12 is connected to the fuel tank 21, and the exhaust pipe 12 is formed to extend in the front direction L1 through the side surface side of the power storage device 1.

[0026] The exhaust pipe 12 is provided with a heat insulation cover 22. The heat insulation cover 22 is provided so as to cover the exhaust pipe 12 from above. The heat insulation cover 22 is disposed between the exhaust pipe 12 and the power storage device 1 and between the exhaust pipe 12 and the vehicle skeleton 10.

[0027] The power storage device 1 is fixed to the vehicle skeleton 10. The power storage device 1 includes a housing case (not shown), a shock absorption member 29, a shared panel 34 that covers the housing case, protection plates 32 and 33, and a plurality of fixing brackets 31. The power storage device 1 is fixed to the vehicle skeleton 10 by the fixing brackets 31.

[0028] The shock absorption member 29 is arranged adjacent to the power storage device 1 in the vehicle width direction W0. The shock absorption member 29 is fixed to the left side rocker 4.

[0029] The protection plates 32 and 33 are arranged adjacent to each other in the vehicle width direction W0. The front end portion of the protection plate 33 is fixed to the suspension member 9, and the rear end portion is fixed to a reinforcing member 44 described later.

[0030] FIG. 3 is a side sectional view showing the power storage device 1 and its surrounding configuration. The protection plate 32 includes a second connection portion 35, a first connection portion 36, and a main body portion 37. The second connection portion 35 is located in the forward direction L1 with respect to the first connection portion 36. The second connection portion 35 is connected to the suspension member 9. Specifically, the second connection portion 35 is fixed to the suspension member 9 by a plurality of bolts or the like. The first connection portion 36 is fixed to a reinforcing member 44 described later. The second connection portion 35 is located above the first connection portion 36 and on the forward direction L1 side of the vehicle 2. The main body portion 37 is formed to extend upward from the first connection portion 36 toward the second connection portion 35.

[0031] A first bending portion 24 is formed at the connection portion between the first connection portion 36 and the main body portion 37, and a second bending portion 23 is formed at the connection portion between the second connection portion 35 and the main body portion 37.

[0032] Note that the bending angle of the second bending portion 23 in the normal state is defined as the bending angle A1, and the bending angle of the first bending portion 24 is defined as the bending angle A2. Note that the bending angle A1 and the bending angle A2 are, for example, 3 degrees or more and 15 degrees or less.

[0033] The power storage device 1 includes a housing case 30, an electric device 40, a power storage stack 42, a connector 43, a shared panel 34, a cooling device 46, a partitioning member 47, and a partition wall 48.

[0034] The housing case 30 includes an upper case 38 and a lower case 39. The upper case 38 is formed to open downward, and the upper case 38 is fixed to the lower case 39. The upper case 38 and the lower case 39 are formed of a metal material such as an aluminum alloy, for example.

[0035] The lower case 39 includes a bottom plate (fixed base material) 50, a peripheral wall 51, and a lower flange 57. The bottom plate 50 includes a bottom body 50A and a reinforcing member 44. The reinforcing member 44 is provided on the lower surface of the bottom body 50A. The peripheral wall 51 is formed to rise upward from the outer peripheral edge of the bottom body 50A. The lower flange 57 is formed to project outward from the upper end of the peripheral wall 51. The peripheral wall 51 includes a front wall 52 located in the forward direction L1.

[0036] The upper case 38 includes a top plate 77 and an upper flange 78. The flange 78 is formed at the outer peripheral edge of the top plate 77, and the flange 78 is formed to project outward. Note that the upper flange 78 and the lower flange 57 are welded to each other, and a flange 79 is formed by the upper flange 78 and the lower flange 57. The flange 79 is formed to project outward from the peripheral wall 51.

[0037] The electrical device 40, the power storage stack 42, and the partition member 47 are housed in the housing case 30. When viewed from the vehicle width direction W0, the electrical device 40 is disposed in the forward direction L1 with respect to the power storage stack 42. The fact that the electrical device 40 is located in the forward direction L1 with respect to the power storage stack 42 means that, for example, when the electrical device 40 and the power storage stack 42 are viewed from the vehicle width direction W0, the center of the electrical device 40 in the front-rear direction L0 is located on the forward direction L1 side with respect to the center of the power storage stack 42 in the front-rear direction L0.

[0038] The electrical device 40 includes at least one of the connection device 41A and the control device 41B. In the present embodiment, both the connection device 41A and the control device 41B are mounted on the power storage device 1, and the electrical device 40 includes both the connection device 41A and the control device 41B. The connection device 41A includes, for example, at least one of an SMR that switches an electrical connection between the power storage stack 42 and the PCU 18, a charging relay that switches an electrical connection between the power storage stack 42 and the charging unit 20, and a high-voltage electrical circuit. The control device 41B is disposed above the connection device 41A. The control device 41B includes a control device such as a battery ECU.

[0039] The forward direction L1 end of the connection device 41A is located closer to the front wall 52 side than the forward direction L1 end of the control device 41B. The connector 43 is connected to the connection device 41A, and the connector 43 is disposed on the outer surface side of the front wall 52. A high-voltage cable is connected to the connector 43. In the front-rear direction L0, the first bent portion 24 is located on the forward direction L1 side with respect to the connector 43.

[0040] The electrical device 40 is fixed to the bottom plate 50 by a plurality of device fixing portions 53 and a plurality of device fixing portions 54. The device fixing portion 54 is disposed on the rear direction L2 side with respect to the device fixing portion 53. A plurality of device fixing portions 53 are provided at intervals in the vehicle width direction W0, and a plurality of device fixing portions 54 are also provided at intervals in the vehicle width direction W0.

[0041] The power storage stack 42 is arranged at an interval in the rearward direction L2 from the electrical equipment 40. The power storage stack 42 includes a plurality of power storage modules 55, and each power storage module 55 includes a plurality of power storage cells. The plurality of power storage modules 55 are arranged in the front-rear direction L0, and the power storage cells are arranged in the vehicle width direction W0.

[0042] The partitioning member 47 is fixed to the inner surface of the bottom body 50A. The partitioning member 47 is formed to extend in the vehicle width direction W0. The partitioning member 47 includes a main body 59, a flange 63, and a flange 64.

[0043] The main body 59 includes a top plate 60 and vertical walls 61, 62. The vertical wall 61 is formed to extend downward from the front side of the top plate 60, and the vertical wall 62 is formed to extend downward from the rear side of the top plate 60.

[0044] The main body 59 of the partitioning member 47 is located between the equipment fixing portion 54 and the power storage stack 42 in the front-rear direction L0. The main body 59 of the partitioning member 47 is arranged to overlap with the electrical equipment 40 in the front-rear direction L0. Specifically, the top plate 60 of the partitioning member 47 is located above the lower surface of the control equipment 41B.

[0045] The flange 63 is formed to extend in the forward direction L1 from the lower side of the vertical wall 61, and the flange 64 is formed to extend in the rearward direction L2 from the lower side of the vertical wall 62.

[0046] FIG. 4 is a partially exploded perspective view when the power storage device 1 is viewed from the bottom side. In this FIG. 4, the shared panel 34 is in a removed state.

[0047] The protection plates 32, 33 and the cooling device 46 are arranged on the lower surface of the lower case 39.

[0048] The shared panel 34 is provided to cover the lower case 39, the cooling device 46, and the reinforcing member 44. The shared panel 34 is fixed to the shock absorbing member 29.

[0049] FIG. 5 is a perspective view showing the reinforcing member 44. The reinforcing member 44 includes a front side 90 positioned in the forward direction L1, a rear side 91 positioned in the rearward direction L2, a side 92 positioned in the right width direction W1, and a side 93 positioned in the left width direction W2.

[0050] The reinforcing member 44 includes a plurality of bulging portions 69A and a plurality of bulging portions 69B. The bulging portion 69A is formed to bulge upward, and the bulging portion 69B is formed to bulge downward. The bulging portions 69A and 69B are formed to extend in the front-rear direction L0. The bulging portions 69A and 69B are alternately formed in the vehicle width direction W0.

[0051] The welding portion 67 is formed on the front end side of the bulging portion 69A, and the welding portion 68 is formed on the rear end side of the bulging portion 69A. The welding portions 67 and 68 fix the reinforcing member 44 to the lower surface of the bottom body 50A.

[0052] The fixing member 65 is provided at the front end of the bulging portion 69B, and the fixing member 66 is provided at the rear end of the bulging portion 69B.

[0053] The plurality of fixing members 65 includes a plurality of fixing members 65A and a plurality of fixing members 65B. The fixing member 65A fixes the protection plate 32 to the lower surface of the reinforcing member 44. The fixing member 65B fixes the protection plate 33 to the lower surface of the reinforcing member 44. The fixing member 66 fixes a shared panel (not shown) to the lower surface of the reinforcing member 44. Note that the fixing member 66 and the welding portion 68 are arranged in the vehicle width direction W0, and the fixing members 65A, 65B and the welding portion 67 are arranged in the vehicle width direction W0. In other words, the fixing member 66 and the welding portion 68 are provided at the same position in the front-rear direction L0, and the fixing members 65A, 65B and the welding portion 67 are provided at the same position in the front-rear direction L0.

[0054] Returning to FIG. 4, the cooling device 46 includes a cooling body 70, a refrigerant flow passage portion 71, and a plurality of fixing brackets 73. Above the cooling body 70, as shown in FIG. 3, the power storage stack 42 is disposed, and the power storage stack 42 is cooled by the flow of refrigerant through the refrigerant flow passage portion 71. Inside the cooling body 70, a refrigerant passage through which the refrigerant flows is formed.

[0055] Inside the refrigerant flow passage portion 71, a supply passage for supplying refrigerant to the cooling body 70 and a discharge passage through which the refrigerant discharged from the cooling body 70 flows are formed. Note that the refrigerant is, for example, a liquid refrigerant.

[0056] Pipes 75 and 76 are connected to the refrigerant flow passage portion 71. The pipes 75 and 76 are arranged adjacent to the connector 43 in the vehicle width direction W0. The protection plate 32 is provided to cover the connector 43 from below, and the protection plate 33 is provided to cover the pipes 75 and 76 from below.

[0057] The plurality of fixing brackets 73 fix the cooling device 46 to the lower case 39. Note that each fixing bracket 73 is formed in a sheet shape. The fixing bracket 73 includes a plurality of fixing brackets 73A connected to the reinforcing member 44.

[0058] FIG. 6 is a side sectional view showing the partitioning member 47 and the surrounding configuration. The partition wall 48 is formed so as to extend upward from the upper surface of the top plate 60. The distance L6 between the upper end 85 of the partition wall 48 and the upper case 38 is smaller than the distance L7 between the control device 41B and the upper case 38. Also, the partition wall 48 is formed so as to extend in the vehicle width direction W0. Both side portions of the partition wall 48 in the vehicle width direction W0 are connected to the peripheral wall 51 of the lower case 39. The partition wall 48 is connected to, for example, the side wall of the peripheral wall 51. Note that the partition wall 48 may be directly connected to the peripheral wall 51 or may be connected to the side wall by a bracket or the like.

[0059] Of the top plate 77 of the upper case 38, a curved portion 86 is formed in a portion located above the upper end 85. In the example shown in FIG. 6, the curved portion 86 is formed to be concave downward. The curved portion 86 is formed to extend in the vehicle width direction W0.

[0060] The device fixing portion 54 is connected to the flange 63 and the bottom body 50A, and the device fixing portion 54 is disposed at a distance from the vertical wall 61 in the forward direction L1. The rear edge 91 of the reinforcing member 44 is located downward D2 of the flange 63 and is located on the forward L1 side of the vertical wall 61. In the front-rear direction L0, the device fixing portion 54 is located in the forward direction L1 of the rear edge 91.

[0061] In the bottom plate 50 of the lower case 39, a portion located forward of the rear edge 91 is defined as the first portion P1, and a portion located between the rear edge 91 and the vertical wall 61 is defined as the second portion P2. The second portion P2 is located adjacent to the first portion P1 in the rear direction L2.

[0062] Also, a portion of the bottom plate 50 of the lower case 39 where the main body 59 of the partitioning member 47 is located is defined as the third portion P3. The third portion P3 is located adjacent to the second portion P2 in the rear direction L2. Further, a portion of the bottom plate 50 of the lower case 39 located on the rear direction L2 side of the third portion P3 is defined as the fourth portion P4.

[0063] And the device fixing portion 54 is disposed in the first portion P1. Also, the power storage stack 42 is fixed to the fourth portion P4. As shown in FIG. 4, the fixing bracket 31 is disposed on the rear direction L2 side of the second portion P2.

[0064] FIG. 7 is a side sectional view showing the device fixing portion 53 and the surrounding configuration. The front side 90 of the reinforcing member 44 is located on the front direction L1 side of the front end portion of the bottom body 50A on the front direction L1 side. In the front-rear direction L0, the first portion P1 of the bottom plate 50 is a portion of the bottom plate 50 that is located between the rear side 91 shown in FIG. 6 and the front end portion of the bottom body 50A on the front direction L1 side. And the device fixing portion 53 is fixed to the first portion P1.

[0065] Here, in FIGS. 6 and 7, in the portion of the bottom plate 50 where the first portion P1 is located, the reinforcing member 44 and the bottom body 50A are located. On the other hand, in the portion of the bottom plate 50 where the second portion P2 is located, the reinforcing member 44 is not provided. For this reason, the second moment of area M1 in the first portion P1 is larger than the second moment of area M2 in the second portion P2. And the bending rigidity B1 in the first portion P1 is larger than the bending rigidity B2 in the second portion P2.

[0066] The reinforcing member 44 is formed with bulging portions 69A and 69B, and the bending rigidity B1 in the first portion P1 is higher than that in the case where the reinforcing member 44 is flat. The metal material forming the reinforcing member 44 has a higher Young's modulus than the metal material forming the lower case 39. As a result, the difference between the bending rigidity B1 and the bending rigidity B2 is increased.

[0067] In the third portion P3, the main body 59 of the partitioning member 47 is located, and the second moment of area M3 is larger than the second moment of area M2. For this reason, the bending rigidity B3 in the third portion P3 is larger than the bending rigidity B2 of the second portion P2. Note that the metal material forming the partitioning member 47 has a higher Young's modulus than the metal material forming the lower case 39. For this reason, the difference between the bending rigidity B3 and the bending rigidity B2 is increased.

[0068] In the vehicle 2 provided with the power storage device 1 configured as described above, an impact force may be applied from the front of the vehicle 2.

[0069] FIG. 8 is a side sectional view schematically showing a state in which an impact force is applied from the front of the vehicle 2. When an impact force is applied from the front of the vehicle 2, the suspension member 9 is displaced rearward in the direction L2. Along with this, the second bent portion 23 deforms so that the bending angle A1 of the second bent portion 23 becomes smaller. Along with this, among the main body portion 37, the end portion on the side of the first bent portion 24 and the first bent portion 24 are displaced downward. When the first bent portion 24 is displaced downward, the first bent portion 24 deforms so that the bending angle A2 of the first bent portion 24 becomes smaller, and a portion of the first connection portion 36 that is located forward in the direction L1 from the portion fixed by the fixing member 65A bends.

[0070] At this time, since the first bent portion 24 is located on the side of the direction L1 forward of the connector 43, it is possible to prevent the second bent portion 23 and the main body portion 37 from contacting the connector 43.

[0071] When the first bent portion 24 is displaced downward, a load F1 and a bending moment BM1 are applied downward to the fixing member 65A, which is the fixing portion of the first connection portion 36 and the reinforcing member 44.

[0072] Here, since the bending rigidity B1 of the first portion P1 is high and the bending rigidity B2 of the second portion P2 is low, the second portion P2 is likely to bend.

[0073] FIG. 9 is a side sectional view schematically showing a state in which the suspension member 9 is further displaced rearward in the direction L2 from the state shown in FIG. 8.

[0074] As shown in this FIG. 9, it bends in the second portion P2. The first portion P1 is located on the side of the direction L1 forward of the second portion P2, and the device fixing portion 53 and the device fixing portion 54 are located in the first portion P1.

[0075] Therefore, the electrical device 40 and the first portion P1 are integrally displaced downward around the second portion P2. By the integral displacement of the electrical device 40, damage to the electrical device 40 can be suppressed. That is, when the portion where the bottom plate 50 bends is located between the device fixing portion 53 and the device fixing portion 54 in the front-rear direction L0, when the bottom plate 50 bends, an external force that bends the electrical device 40 is applied to the electrical device 40, and there is a risk of causing an adverse effect that the electrical device 40 is damaged. On the other hand, in the power storage device 1 according to the present embodiment, such an adverse effect can be suppressed.

[0076] The second portion P2 is located between a first portion P1 having a bending rigidity higher than the bending rigidity B2 and a third portion P3 having a bending rigidity higher than the bending rigidity B2 in the front-rear direction L0.

[0077] For this reason, when a load F1 and a bending moment BM1 are applied to the fixing member 65A, it is easy to bend in the second portion P2, and it is possible to suppress bending at a position deviated from the second portion P2.

[0078] By bending in the second portion P2, deformation of the fourth portion P4 located on the rearward L2 side of the second portion P2 is suppressed. Note that the bending rigidity of the fourth portion P4 may be made higher than that of the second portion P2. For example, the bending rigidity of the fourth portion P4 can be increased by arranging a reinforcing member in the fourth portion P4 or increasing the plate thickness of the portion of the bottom plate 50 where the fourth portion P4 is located. The bending rigidity of the fourth portion P4 is made smaller than the bending rigidity of the first portion P1.

[0079] And the power storage stack 42 is fixed to the fourth portion P4, and since deformation of the fourth portion P4 is suppressed, damage to the power storage stack 42 can be suppressed.

[0080] When the first part P1 is displaced downward about the second part P2, the curved portion 86 of the upper case 38 deforms so as to extend. Thereby, it is possible to suppress the upper case 38 from cracking. By suppressing the occurrence of cracks in the upper case 38, it is possible to suppress water, foreign matter, etc. from entering the power storage device 1 from the outside even after an impact force is applied.

[0081] And in FIG. 6, the distance L6 between the upper end 85 of the partition wall 48 and the upper case 38 is smaller than the distance L7 between the control device 41B and the upper case 38. Therefore, when the upper case 38 deforms, the partition wall 48 can support the upper case 38 before the upper case 38 contacts the control device 41B. Thereby, it is possible to suppress damage to the control device 41B due to deformation of the upper case 38.

[0082] The partition wall 48 is formed so as to extend in the vehicle width direction W0. Therefore, even if the control device 41B is displaced rearward in the direction L2 due to an impact force, the partition wall 48 can support the control device 41B, and it is possible to suppress the control device 41B from contacting the power storage stack 42.

[0083] The rear edge 91 of the reinforcing member 44 is located below the flange 63. Thus, since the flange 63 is located above the rear edge 91, when the bottom plate 50 deforms about the second part P2, the flange 63 functions as a protective wall. Thereby, in the second part P2, even if the bottom plate 50 deforms, it is possible to suppress the deformed bottom plate 50 from contacting the electrical device 40 or the like.

[0084] The top plate 60 of the partition member 47 is located above the lower surface of the control device 41B. Therefore, even if the control device 41B is displaced rearward in the direction L2 due to an impact force, the control device 41B is supported by the partition member 47, and it is possible to suppress the control device 41B from contacting the power storage stack 42.

[0085] In FIG. 4, the cooling body 70 of the cooling device 46 is disposed on the lower surface of the bottom plate 50 and in the fourth portion P4. Therefore, when the bottom plate 50 bends in the second portion P2, damage to the cooling body 70 can be suppressed.

[0086] The fixed bracket 73A connects the cooling body 70 and the reinforcing member 44, and deforms so as to bend when the bottom plate 50 bends in the second portion P2 and the reinforcing member 44 is displaced.

[0087] On the other hand, since the fixed bracket 73A is formed in a sheet shape, when the fixed bracket 73A bends, a large load is suppressed from being applied to the cooling body 70. Thereby, when the fixed bracket 73A is deformed, deformation of the cooling body 70 can be suppressed.

[0088] (Embodiment 2) The power storage device 1A according to Embodiment 2 will be described with reference to FIG. 10 and the like. The power storage device 1A includes a protection plate 32A. The configuration of the power storage device 1A other than the protection plate 32A is substantially the same as that of the power storage device 1.

[0089] FIG. 10 is a cross-sectional view showing the power storage device 1A. The protection plate 32A includes a first connection portion 36, a second connection portion 35, and a main body portion 37A.

[0090] The first connection portion 36 includes a thick portion 36A. The thick portion (overlapping portion) 36A overlaps the electrical device 40 in the vertical direction in the first connection portion 36.

[0091] The thickness of the thick portion 36A is formed thicker than the thickness of the portion other than the thick portion 36A in the protection plate 32A. The bending rigidity of the thick portion 36A is higher than the bending rigidity of the portion other than the thick portion 36A.

[0092] The first connection portion 36 includes a thick portion 36A and a thin portion 36B. The thin portion 36B is located on the frontward L1 side with respect to the thin portion 36B. The bending rigidity of the thin portion 36B is lower than the bending rigidity of the thick portion 36A.

[0093] The main body portion 37A is formed thicker than the second connection portion 35 and the thin portion 36B. The bending rigidity of the main body portion 37A is higher than either the bending rigidity of the second connection portion 35 or the bending rigidity of the thin portion 36B.

[0094] In a vehicle equipped with the power storage device 1A configured as described above, when an impact force is applied from the front of the vehicle 2, the protection plate 32A deforms.

[0095] At this time, since the bending rigidity of the thick portion 36A is higher than the bending rigidity of the thin portion 36B, the thin portion 36B bends downward about the connection portion between the thin portion 36B and the thick portion 36A. Therefore, it is possible to prevent the thin portion 36B from contacting the connector 43.

[0096] In particular, since the thick portion 36A is difficult to deform, it is possible to prevent the thick portion 36A from damaging the bottom plate 50.

[0097] Since the bending rigidity of the main body portion 37A is higher than the bending rigidity of the thin portion 36B, the first bending portion 24 is likely to bend so that the first bending portion 24 is displaced downward. As a result, when deformed, the thin portion 36B is likely to move away from the connector 43. (Embodiment 3) The power storage device 1B according to Embodiment 3 will be described with reference to FIG. 11 and the like. The power storage device 1B includes a protection plate 32B. The configuration of the power storage device 1B other than the protection plate 32B is substantially the same as that of the power storage device 1.

[0098] FIG. 11 is a cross-sectional view showing the power storage device 1B. The protection plate 32B includes a first connection portion 36, a second connection portion 35, a main body portion 37, and a reinforcing plate 24B. The reinforcing plate 24B is fixed to the lower surface of the first bending portion 24.

[0099] Therefore, the bending rigidity of the first bent portion 24 is higher than that of the second bent portion 23.

[0100] Therefore, when an impact force is applied from the front of the vehicle 2 and the protection plate 32B is deformed, it is possible to suppress large bending at the first bent portion 24.

[0101] If the first bent portion 24 bends greatly and the main body portion 37 is displaced about the first bent portion 24, the main body portion 37 is likely to contact the connector 43.

[0102] On the other hand, in the protection plate 32B, since large deformation of the first bent portion 24 is suppressed, it is possible to suppress the occurrence of the above-mentioned adverse effects. (Embodiment 4) The power storage device 1C according to Embodiment 4 will be described with reference to FIG. 12 and the like. The power storage device 1C includes a reinforcing member 44C. The configuration of the power storage device 1C other than the reinforcing member 44C is substantially the same as that of the power storage device 1.

[0103] FIG. 12 is a cross-sectional view showing the power storage device 1C. In the front-rear direction L0, the front side 90C of the reinforcing member 44C is located on the front direction L1 side with respect to the front end portion of the flange 79.

[0104] Therefore, when the protection plate 32 is deformed, even if the main body portion 37 is displaced so that the bending angle of the first bent portion 24 becomes small about the first bent portion 24, the front side 90C contacts the main body portion 37, thereby suppressing the main body portion 37 from contacting the flange 79. Thereby, it is possible to suppress damage to the housing case 30. (Embodiment 5) The power storage device 1D according to Embodiment 5 will be described with reference to FIG. 13 and the like. The power storage device 1D includes a bottom plate 50D. The configuration of the power storage device 1D other than the power storage device 1 is substantially the same as that of the power storage device 1.

[0105] FIG. 13 is a cross-sectional view showing the power storage device 1D. The bottom plate 50D includes a reinforcing member 44D and a bottom body 50A. The reinforcing member 44D includes a front side 90D located in the forward direction L1 and a rear side 91D located in the rearward direction L2.

[0106] The thickness of the reinforcing member 44D at the rear side 91D is thicker than the thickness of the reinforcing member 44D at the front side 90D. The bending rigidity at the rear side 91D is higher than the bending rigidity at the front side 90D.

[0107] For this reason, the difference in the bending rigidity between the first portion P1 and the second portion P2 at the portion where the rear side 91D is located becomes large. As a result, when an impact force is applied, it is possible to suppress the position where the bottom plate 50D bends from shifting from the second portion P2.

[0108] Also, it is possible to suppress large deformation of the portion of the bottom plate 50D where the rear side 91D is located. Since the device fixing portion 54 is located near the rear side 91D, it is possible to suppress large deformation of the rear side 91 and its surroundings, so that it is possible to suppress deformation of the device fixing portion 54 and damage to the electrical device 40.

[0109] In the example shown in FIG. 13, it is formed so that the thickness increases from the front side 90D side toward the rear side 91D side, and it is formed so that the bending rigidity increases from the front side 90D side toward the rear side 91D side. (Embodiment 6) The power storage device 1E according to Embodiment 6 will be described with reference to FIG. 14 and the like. The power storage device 1E includes a bottom plate 50E. The configuration of the power storage device 1E other than the bottom plate 50E is substantially the same as that of the power storage device 1.

[0110] FIG. 14 is a cross-sectional view showing the power storage device 1E. The bottom plate 50E includes a reinforcing member 44E and a bottom body 50A. The reinforcing member 44E includes a front side 90E located in the forward direction L1 and a rear side 91E located in the rearward direction L2.

[0111] The thickness of the reinforcing member 44E at the front side 90E is greater than the thickness of the reinforcing member 44E at the rear side 91E. The flexural rigidity at the front side 90E is higher than the flexural rigidity at the rear side 91E.

[0112] Here, during a collision, when a load and a bending moment in the downward direction D2 are applied to the front side 90E through the fixing member 65A, deformation of the front side 90E and its surrounding portions of the reinforcing member 44E is suppressed.

[0113] As a result, the first connection portion 36 bends in the vicinity of the fixing member 65A, and the first connection portion 36 is likely to be displaced downward with this bent portion as the center. Thereby, contact between the protection plate 32 and the connector 43 can be suppressed.

[0114] On the front side 90E, since large deformation of the bottom plate 50E is suppressed, deformation of the device fixing portion 53 disposed in the vicinity of the front side 90E is suppressed. Along with this, damage to the electric device 40 can be suppressed. (Embodiment 7) The power storage device 1F according to Embodiment 7 will be described with reference to FIG. 15 and the like. The power storage device 1F includes a protection plate 32F. The configuration of the power storage device 1F other than the protection plate 32F is substantially the same as that of the power storage device 1.

[0115] FIG. 15 is a cross-sectional view showing the power storage device 1F. The protection plate 32F includes a first connection portion 36F, a main body portion 37F, a second connection portion 35F, a first bent portion 24F, a second bent portion 23F, a tip portion 25, and a rear end portion 26. The tip portion 25 is located at the end in the forward direction L1 of the protection plate 32F. The rear end portion 26 is located at the end in the rearward direction L2 of the protection plate 32F.

[0116] In the protection plate 32F, the thickness of the rear end portion 26 is greater than the thickness of the front end portion 25. Therefore, the bending rigidity of the rear end portion 26 and its surroundings is higher than the bending rigidity of the front end portion 25 and its surroundings. Thus, when the protection plate 32F is deformed, it is possible to suppress the rear end portion 26 and its vicinity from being greatly deformed. Accordingly, it is possible to suppress damage to the electric device 40.

[0117] The thickness of the protection plate 32F increases from the front end portion 25 side toward the rear end portion 26 side. Therefore, when the suspension member 9 is displaced rearward due to a collision, it is difficult for the first bending portion 24F to be deformed, and it is possible to suppress the main body portion 37F from contacting the connector 43 and damaging the connector 43.

[0118] On the other hand, the load and the bending moment applied from the suspension member 9 to the protection plate 32F are easily transmitted to the second portion P2, and the bottom plate 50 can be bent at the second portion P2. (Embodiment 8) The power storage device 1G according to Embodiment 8 will be described with reference to FIG. 16 and the like. The power storage device 1G includes a protection plate 32G. The configuration of the power storage device 1G other than the protection plate 32G is substantially the same as that of the power storage device 1.

[0119] FIG. 16 is a cross-sectional view showing the power storage device 1G. The protection plate 32G includes a first connection portion 36G, a main body portion 37G, a second connection portion 35G, a first bending portion 24G, a second bending portion 23G, a front end portion 25, and a rear end portion 26.

[0120] The thickness of the front end portion 25 is greater than the thickness of the rear end portion 26, and the bending rigidity of the front end portion 25 is higher than the bending rigidity of the rear end portion 26.

[0121] Therefore, even if an impact force is applied from the suspension member 9 to the second connection portion 5G, the connection state between the second connection portion 35G and the suspension member 9 can be maintained. Thereby, a load and a bending moment can be transmitted to the second portion P2.

[0122] In the example shown in FIG. 16, the thickness of the protection plate 32G is formed to increase from the first bent portion 24G toward the tip portion 25.

[0123] When an impact force is applied from the suspension member 9 to the protection plate 32G, particularly, a large load is applied between the first bent portion 24G and the tip portion 25. Therefore, there is a risk that the portion located between the first bent portion 24G and the tip portion 25 may be damaged or broken. On the other hand, in this protection plate 32G, it is possible to suppress the occurrence of the above-mentioned adverse effects.

[0124] Note that the thickness of the protection plate 32G may be increased from the rear end portion 26 toward the tip portion 25. (Embodiment 9) The power storage device 1H according to Embodiment 9 will be described with reference to FIG. 17 and the like. The power storage device 1H includes a protection plate 32H. The configuration of the power storage device 1H other than the protection plate 32H is substantially the same as that of the power storage device 1.

[0125] FIG. 17 is a cross-sectional view showing the power storage device 1H. The protection plate 32H includes a first connection portion 36H, a main body portion 37H, a second connection portion 35H, a first bent portion 24H, a second bent portion 23H, a tip portion 25, and a rear end portion 26.

[0126] And the connector 43 is located on the rearward L2 side rather than at least one of the tip portions on the forward L1 side of the lower flange 57, the flange 78, and the flange 79.

[0127] Let the distance in the vertical direction D0 from the bottom plate 50 to the housing case 30 be the distance L8, and the distance in the vertical direction D0 from the bottom plate 50 to the floor panel 6 be the distance L9.

[0128] The length of the main body portion 37H is longer than the distance L8. Therefore, even if the protective plate 32H rotates around the first bending portion 24H so as to approach the housing case 30, the main body portion 37H is prevented from contacting any of the lower flange 57, the flange 78, and the flange 79 and contacting the connector 43. Thereby, it is possible to prevent the connector 43 from being damaged.

[0129] Also, in the example shown in FIG. 17, the length of the main body portion 37H is longer than the distance L9. Therefore, even if the protective plate 32H rotates around the first bending portion 24H so as to approach the housing case 30, the main body portion 37H contacts the floor panel 6 before contacting the housing case 30. Thereby, it is possible to prevent the housing case 30 from being damaged. (Embodiment 10) Using FIG. 18 and the like, the power storage device 1J according to Embodiment 10 and the vehicle 2J including the power storage device 1J will be described.

[0130] As a fixing structure of the power storage device to the vehicle skeleton 10, various fixing structures can be adopted. In this power storage device 1J, it is fixed between the left side rocker 4J and the right side rocker 5J.

[0131] FIG. 18 is a bottom view showing the bottom of the vehicle 2J. FIG. 19 is a cross-sectional view schematically showing the vehicle 2J and the power storage device 1J.

[0132] The vehicle 2J is an electric vehicle. The vehicle 2J includes a power storage device 1J, a drive motor and a PCU (not shown), and a vehicle skeleton 10J.

[0133] The vehicle skeleton 10J includes a left side locker 4J, a right side locker 5J, a left front side member 7J, a right front side member 8J, and a front panel 9J. Above the front panel 9J, a drive motor and a PCU are arranged. In the example shown in FIG. 18, for example, the vehicle 2J does not include a floor panel. The power storage device 1J also functions as a floor panel, and the power storage device 1J partitions the passenger compartment space and the vehicle exterior space. In the example shown in FIG. 18, instead of the floor panel, the upper case of the storage case functions as the floor panel, but the upper cover of the storage case may be omitted and the floor panel may be made to function as the upper case. In this case, the opening of the lower case will be blocked by the floor panel, and electrical equipment 40, a power storage stack 42, etc. will be accommodated in the space formed by the lower case and the floor panel.

[0134] The power storage device 1J shown in FIG. 18 is fixed to the left side locker 4J and the right side locker 5J. The power storage device 1J includes a storage case 30J, a fixing flange 27A and a fixing flange 27B, and a protection plate 32J. Note that the internal structure of the storage case 30J is configured in the same manner as that of the power storage device 1.

[0135] Therefore, the bottom plate 50J of the storage case 30J includes a bottom body 50A and a reinforcing member 44J, and a first portion P1 and a second portion P2 are formed on the bottom plate 50J.

[0136] The protection plate 32J includes a first connection portion 36J, a main body portion 37J, and a second connection portion 35J. The first connection portion 36J is fixed to the reinforcing member 44J of the bottom plate 50J, and the second connection portion 35J is connected to the front panel 9J.

[0137] Thus, the power storage device according to the present disclosure can be applied to electric vehicles such as hybrid vehicles, plug-in hybrid vehicles, and electric vehicles.

[0138] Also, in the present embodiment, the bottom plate 50 of the storage case 30 corresponds to the "fixed base material", but the "fixed base material" is not limited to the bottom plate 50. For example, the side wall of the storage case 30 may be used as the fixed base material, and the fixed base material is not limited to the bottom plate 50.

[0139] Further, in the present embodiment, the bottom plate 50 as the fixed base material includes the bottom body 50A and the reinforcing member 44. For example, instead of the reinforcing member 44, a thick portion may be integrally formed on the bottom body 50A to form a reinforcing portion. Note that the reinforcing member 44 corresponds to the "reinforcing portion", but various configurations can be adopted as the reinforcing portion. For example, as the reinforcing portion, ribs extending in the front-rear direction L0 may be provided on the bottom body 50A, or a member with a high Young's modulus extending in the front-rear direction L0 may be arranged. In this case, the Young's modulus of the rib as the reinforcing portion is higher than that of the portion of the bottom body 50A where no rib is provided.

[0140] Also, in the present embodiment, the second bending portion 23 and the first bending portion 24 are formed on the protection plate 32, but such bending portions may not be formed on the protection plate 32. For example, the first connection portion 36 and the second connection portion 35 may be smoothly connected. Note that the vehicle skeleton 10 may be located above the partitioning member 47 and may include a member extending in the vehicle width direction W0. (Embodiment 11) The power storage device 1K according to Embodiment 11 will be described with reference to FIG. 20 and the like. FIG. 20 is a plan view schematically showing a lower case 39, a reinforcing member 44, and device fixing portions 53A, 53B and device fixing portions 54A, 54B. In this FIG. 20, the upper case 38 and the like are not shown.

[0141] The reinforcing member 44 is provided on the lower surface of the bottom body 50A of the lower case 39. The device fixing portions 53A, 53B and the device fixing portions 54A, 54B are members for fixing the electric device 40 to the bottom body 50A.

[0142] FIG. 21 is a plan view schematically showing the distribution of bending rigidity. Also in the example shown in FIG. 21, the first portion P1 is located on the forward L1 side of the rear edge 91 of the reinforcing member 44 among the bottom plates 50. The second portion P2 is located between the rear edge 91 and the vertical wall 61.

[0143] Here, when viewed in plan, the first portion P1 is located in the region where the reinforcing member 44 is located, and the device fixing portions 53A, 53B and the device fixing portions 54A, 54B are provided in the first portion P1.

[0144] Thus, since all of the device fixing portions 53A, 53B and the device fixing portions 54A, 54B are fixed to the first portion P1, even if an impact force is applied to the power storage device 1K from the forward L1 side, the device fixing portions 53A, 53B and the device fixing portions 54A, 54B will be displaced integrally.

[0145] In particular, in the power storage device 1K, when viewed in plan, the device fixing portions 53A, 53B and the device fixing portions 54A, 54B are arranged at positions overlapping with the reinforcing member 44.

[0146] Thereby, when an impact force is applied to the power storage device 1K, the device fixing portions 53A, 53B and the device fixing portions 54A, 54B are easily displaced integrally. (Embodiment 12) The power storage device 1L will be described with reference to FIG. 22 and the like. FIG. 22 is a plan view schematically showing the lower case 39, the reinforcing member 44L, and the device fixing portions 53C, 53D and the device fixing portions 54C, 54D.

[0147] The reinforcing member 44L includes a plate portion 95, a plate portion 96, and a connecting portion 97. The plate portion 95 and the plate portion 96 are provided at intervals in the vehicle width direction W0, and the connecting portion 97 is formed to connect the plate portion 95 and the plate portion 96.

[0148] FIG. 23 is a plan view schematically showing the distribution of bending rigidity. In this power storage device 1L, the first portion P1 is located in the region where the reinforcing member 44L is positioned. The second portion P2 is located on the rearward L2 side of the first portion P1.

[0149] The device fixing portions 53C, 53D and the device fixing portions 54C, 54D are fixed to the first portion P1. Therefore, if an impact force is applied to the power storage device 1L from the forward L1 side, the device fixing portions 53C, 53D and the device fixing portions 54C, 54D will be displaced integrally. (Embodiment 13) The power storage device 1M will be described with reference to FIG. 24 and the like. FIG. 24 is a plan view schematically showing the lower case 39, the reinforcing member 44, the device fixing portions 53E, 53F and the device fixing portions 54E, 54F.

[0150] The power storage device 1M further includes an inner reinforcing member 98 in addition to the configuration of the power storage device 1 of Embodiment 1. The inner reinforcing member 98 is disposed within the lower case 39 and is fixed to the upper surface of the bottom body 50A.

[0151] The device fixing portions 53E, 53F and the device fixing portions 54E, 54F are fixed to the inner reinforcing member 98.

[0152] FIG. 25 is a plan view schematically showing the distribution of bending rigidity. When viewed in plan, the first portion P1 is located in the portion where the inner reinforcing member 98 and the reinforcing member 44 are positioned. The second portion P2 is located on the rearward L2 side of the first portion P1.

[0153] And the device fixing portions 53E, 53F and the device fixing portions 54E, 54F are fixed to the first portion P1. Therefore, when an impact force is applied to the power storage device 1M from the forward L1, the device fixing portions 53E, 53F and the device fixing portions 54E, 54F will be displaced integrally.

[0154] The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the claims, and it is intended that all modifications within the meaning and scope equivalent to the claims be included.

Explanation of Reference Numerals

[0155] 1, 1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H, 1J power storage device; 2, 2J vehicle; 3, 10, 10J body skeleton; 4, 4J left side locker; 5, 5J right side locker; 5G, 35, 35F, 35G, 35H, 35J second connection part; 6 floor panel; 7, 7J left front side member; 8, 8J right front side member; 9 suspension member; 9J front panel; 11 drive device; 12 exhaust pipe; 13 accommodation space; 14 passenger compartment space; 15 engine; 16, 17 motor generator; 19 drive wheel; 20 charging part; 21 fuel tank; 22 heat insulation cover; 23, 23F, 23G, 23H second bent part; 24, 24F, 24G, 24H first bent part; 24B reinforcing plate; 25 tip part; 26 rear end part; 27A, 27B fixing flange; 29 shock absorbing member; 30, 30J accommodation case; 31, 73, 73A fixing bracket; 32, 32A, 32B, 32F, 32G, 32H, 32J, 33 protection plate; 34 share panel; 36, 36F, 36G, 36H, 36J first connection part; 36A thick part; 36B thin part; 37, 37A, 37F, 37G, 37H, 37J main body part; 38 upper case; 39 lower case; 40 electrical equipment; 41A connecting equipment; 41B control equipment; 42 power storage stack; 43 connector; 44, 44C, 44D, 44E, 44J reinforcing member; 46 cooling device; 47 partitioning member; 48 partition wall; 50, 50D, 50E, 50J bottom plate; 50A bottom body; 51 peripheral wall; 52 front wall; 53, 54 equipment fixing part; 55 power storage module; 57 lower flange; 59 main body; 60, 77 top plate; 61, 62 vertical wall; 63, 64, 78, 79 flange; 65, 65A, 65B, 66 fixing member; 67, 68 welding part; 69A, 69B bulging part; 70 cooling main body; 71 refrigerant flow part.

Claims

1. A housing case, a power storage stack housed in the housing case, an electrical device housed in the housing case, and a connecting member provided on the housing case, wherein, assuming the direction from the power storage stack toward the electrical device as a first direction and the direction opposite to the first direction as a second direction, the housing case includes a fixed base material, the fixed base material includes a first portion, and a second portion provided at a position adjacent to the first portion in the second direction and having a lower bending rigidity than the first portion, the electrical device is fixed to the first portion, the connecting member includes a first connection portion connected to the first portion, and a second connection portion located on the first direction side of the first connection portion and above the first connection portion and connected to a vehicle, and a body portion located between the first connection portion and the second connection portion, wherein the body portion includes a portion extending upward as it goes from the first connection portion side toward the second connection portion, a power storage device.

2. The power storage device according to claim 1, wherein the first portion includes a reinforcing portion.

3. A housing case, a power storage stack housed in the housing case, an electrical device housed in the housing case, and a connecting member provided on the housing case, wherein, assuming the direction from the power storage stack toward the electrical device as a first direction and the direction opposite to the first direction as a second direction, the housing case includes a fixed base material, the fixed base material includes a first portion, and a second portion adjacent to the first portion in the second direction, the first portion includes a reinforcing portion, the electrical device is fixed to the first portion, the connecting member includes a first connection portion fixed to the first portion, and a second connection portion located on the first direction side of the first connection portion and above the first connection portion and fixed to a vehicle, and a body portion located between the first connection portion and the second connection portion, wherein the body portion includes a portion extending upward as it goes from the first connection portion side toward the second connection portion, a power storage device.

4. including a first device fixing portion and a second device fixing portion for fixing the electrical device to the fixed base material of the housing case, wherein the first device fixing portion is located on the first direction side of the second device fixing portion. ​ ​ The end of the reinforcing portion located on the first direction side is located on the first direction side rather than the first device fixing portion. The end of the reinforcing portion located on the second direction side is located on the second direction side rather than the second device fixing portion. The power storage device according to claim 2 or 3.

5. The housing case includes a lower case. The reinforcing portion includes an outer reinforcing member provided on the lower surface of the lower case. When the lower case and the outer reinforcing member are viewed in plan, the first device fixing portion and the second device fixing portion are provided at a portion where the outer reinforcing member is located. The power storage device according to claim 4.

6. The housing case includes a lower case. The reinforcing portion includes an outer reinforcing member provided on the lower surface of the lower case and an inner reinforcing member provided on the upper surface of the lower case. When the lower case, the outer reinforcing member, and the inner reinforcing member are viewed in plan, the first device fixing portion and the second device fixing portion are provided at a portion where the outer reinforcing member and the inner reinforcing member are located. The power storage device according to claim 4.

7. The connecting member is fixed to the reinforcing portion. The power storage device according to claim 2 or 3.

8. The electrical device is fixed to the upper surface of the fixing base material. The connecting member is fixed to the lower surface of the fixing base material. Among the connecting members, the overlapping portion that overlaps the electrical device in the vertical direction has a higher bending rigidity than the portion adjacent to the overlapping portion in the first direction. The power storage device according to claim 2 or 3.

9. The connecting member includes a first bending portion formed by the first connection portion and the main body portion, and a second bending portion formed by the second connection portion and the main body portion. The bending rigidity of the first bending portion is higher than that of the second bending portion. The power storage device according to claim 2 or 3.

10. The housing case is provided on the fixing base material and includes a partitioning member located on the second direction side rather than the second portion. The partitioning member includes a partitioning main body extending upward from the fixing base material, a first flange extending in the first direction from the lower end portion of the partitioning main body, and a second flange extending in the second direction from the lower end portion of the partitioning main body. The end of the reinforcing portion on the second direction side is located below the first flange. The power storage device according to claim 2 or 3.

11. The power storage device is connected to the electrical equipment and further includes a connector drawn out from the housing case in the first direction. The connecting member is a first bent portion formed by the first connection portion and the main body portion, and a second bent portion formed by the second connection portion and the main body portion, and includes The first bent portion is located on the first direction side of the connector. The power storage device according to claim 2 or claim 3.

12. The housing case includes an upper case and a lower case located below the upper case. The lower case includes the fixed base material, a peripheral wall portion extending upward from the fixed base material, and a case flange formed at the upper end of the peripheral wall portion. An end portion of the reinforcing portion located in the first direction is located on the first direction side of the case flange. The power storage device according to claim 2 or claim 3.

13. The housing case further includes a partition wall extending upward from the fixed base material side. The partition wall is formed to extend above the electrical equipment. The power storage device according to claim 2 or claim 3.

14. The housing case includes an upper case and a lower case located below the upper case. The lower case includes the fixed base material and a peripheral wall portion extending upward from the fixed base material. The partition wall is connected to the peripheral wall portion. The power storage device according to claim 13.

15. The reinforcing portion includes a first reinforcing end portion located on the first direction side and a second reinforcing end portion located on the second direction side. The bending rigidity of the second reinforcing end portion is higher than that of the first reinforcing end portion. The power storage device according to claim 2 or claim 3.

16. The reinforcing portion includes a first reinforcing end portion located on the first direction side and a second reinforcing end portion located on the second direction side. The bending rigidity of the reinforcing portion increases from the second reinforcing end portion side toward the first reinforcing end portion side. The power storage device according to claim 2 or claim 3.

17. The connecting member includes a first connecting end portion located on the first direction side and a second connecting end portion located on the second direction side. The bending rigidity increases from the second connecting end portion side toward the first connecting end portion side. The power storage device according to claim 2 or claim 3.

18. The connecting member includes a first connecting end portion located on the first direction side and a second connecting end portion located on the second direction side. The power storage device according to claim 2 or claim 3, wherein at least a part of the connecting member is formed with a portion having an increasing bending rigidity from the second connecting end portion side toward the first connecting end portion side.

19. The power storage device is connected to the electric device and further includes a connector drawn out from the housing case in the first direction. The housing case includes an upper case and a lower case located below the upper case. The lower case The fixed base material A peripheral wall portion extending upward from the fixed base material And a case flange formed at the upper end of the peripheral wall portion and projecting in the first direction. The connecting member A first bent portion formed by the first connecting portion and the main body portion And a second bent portion formed by the second connecting portion and the main body portion. The length of the main body portion is longer than the vertical lengths of the case flange and the fixed base material. The power storage device according to claim 2 or claim 3.

20. A vehicle including the power storage device according to claim 2 or claim 3, The vehicle includes a floor panel. The power storage device is disposed below the floor panel. The connecting member A first bent portion formed by the first connecting portion and the main body portion And a second bent portion formed by the second connecting portion and the main body portion. The length of the main body portion is longer than the vertical lengths of the floor panel and the fixed base material. The vehicle.

21. A vehicle frame And a power storage device disposed at the bottom of the vehicle frame The vehicle includes The power storage device A housing case A power storage stack housed in the housing case An electric device housed in the housing case And a connecting member provided on the housing case And includes Taking the direction from the power storage stack toward the electric device as the first direction And the direction opposite to the first direction as the second direction, The housing case includes a fixed base material. The fixed base material A first portion And a second portion provided at a position adjacent to the first portion in the second direction and having a lower bending rigidity than the first portion. The electric device is fixed to the first portion. The connecting member A first connecting portion connected to the first portion And a second connecting portion located on the first direction side of the first connecting portion and above the first connecting portion and connected to the vehicle. including a main body portion located between the first connection portion and the second connection portion, a vehicle, wherein the main body portion includes a portion extending upward as it goes from the first connection portion side toward the second connection portion side.

22. The vehicle according to claim 21, wherein the first portion includes a reinforcing portion.

23. A vehicle comprising: a vehicle skeleton; and a power storage device disposed at the bottom of the vehicle skeleton. The power storage device includes: a housing case; a power storage stack housed in the housing case; electrical equipment housed in the housing case; and a connecting member provided on the housing case. The power storage stack, the electrical equipment, and the connecting member are provided. Taking the direction from the power storage stack toward the electrical equipment as the first direction, and taking the direction opposite to the first direction as the second direction, the housing case includes a fixing base material, the fixing base material includes: a first portion; and a second portion adjacent to the first portion in the second direction. The first portion includes a reinforcing portion. The electrical equipment is fixed to the first portion. The connecting member includes: a first connection portion fixed to the first portion; and a second connection portion located in front of the vehicle and above the first connection portion and fixed to the vehicle. including a main body portion located between the first connection portion and the second connection portion, a vehicle, wherein the main body portion includes a portion extending upward as it goes from the first connection portion side toward the second connection portion side.

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