Electric storage device

Abstract

To provide a power storage device which can improve the energy density and increase the protective property of a power storage module.SOLUTION: A power storage device 1 comprises: a plurality of power storage modules 10; a pair of frame members 25, 26 which extend along a first direction and are arranged side by side along a second direction orthogonal to the first direction such that the plurality of power storage modules 10 are located therebetween; a plurality of cross members 21 which respectively connect the pair of frame members 25, 26 so as to demarcate a region where each of the plurality of power storage modules 10 is arranged; and a panel member 60 which covers the plurality of power storage modules 10. The plurality of cross members 21 extend along the second direction and are arranged side by side in the first direction. The panel member 60 includes a plurality of panel constitution members 61 which extend along the first direction and are arranged side by side in the second direction.SELECTED DRAWING: Figure 4

Description

Technical Field

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

Background Art

[0002] As a conventional power storage device, Japanese Patent Application Laid-Open No. 2012-176751 (Patent Document 1) discloses a configuration in which three batteries (power storage modules) are housed inside an outer frame member whose interior is partitioned by a T-shaped member. The outer frame member is connected to a skeleton forming member that forms the skeleton of the vehicle.

[0003] Specifically, the front end member of the outer frame member is connected to an extension side member, and a pair of side end members of the outer frame member are connected to a pair of side members. The rear end member of the outer frame member is connected to a rear cross member that forms the skeleton of the vehicle. Further, an opening for enhancing the heat dissipation of the battery is provided at the bottom of the outer frame member, and the battery is exposed downward from the vehicle body through the opening.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the configuration disclosed in Patent Document 1, since an opening is provided at the bottom of the outer frame member, there is a concern that the strength of the bottom portion is reduced and the impact resistance is also reduced.

[0006] The present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a power storage device capable of enhancing durability against impacts.

Means for Solving the Problems

[0007] The power storage device according to the present disclosure includes a plurality of power storage modules, a pair of frame members that extend along a first direction and are arranged side by side in a second direction orthogonal to the first direction so that the plurality of power storage modules are positioned therebetween, a plurality of cross members that each connect the pair of frame members so as to partition regions in which the respective plurality of power storage modules are arranged, and a panel member that covers the plurality of power storage modules. The plurality of cross members extend along the second direction and are arranged side by side in the first direction. The panel member includes a plurality of panel components that extend along the first direction and are arranged side by side in the second direction.

[0008] According to the above configuration, by providing the plurality of cross members so as to extend in the first direction and providing the plurality of panel components constituting the panel member so as to extend in the second direction, the durability against impacts from any direction of the first direction and the second direction can be enhanced.

[0009] In the power storage device according to the present disclosure, the plurality of panel components may include a first component and a second component that are adjacent to each other in the second direction. Further, an end portion of the first component located on the second component side and an end portion of the second component located on the first component side may include a contact portion that contacts each other in the direction in which the plurality of power storage modules and the panel member are arranged side by side. In this case, it is preferable that the gap between the first component and the second component is sealed by the contact portion.

[0010] According to the above configuration, by sealing the gap between the first component and the second component by the contact portion, it is possible to suppress the intrusion of water from the outside of the panel member to the power storage module side without using other members.

[0011] In the power storage device according to the present disclosure, it is preferable that a labyrinth structure is formed by the end portion of the first component located on the second component side and the end portion of the second component located on the first component side.

[0012] According to the above configuration, a labyrinth structure is formed by the end of the first component and the end of the second component, so that the intrusion of water from the road surface side to the power storage module side can be further suppressed.

[0013] In the power storage device according to the present disclosure, the first component and the second component may be composed of the same type of components having the same shape.

[0014] According to the above configuration, since the panel member can be formed by reducing the types of parts, the manufacturing cost can be reduced.

[0015] In the power storage device according to the present disclosure, the first component and the second component may be composed of metal components having different coefficients of thermal expansion.

[0016] Since the thermal expansion on one side of the first component and the second component can be suppressed, the reaction force acting by the abutment of the expanded parts against each other can be suppressed, and the distortion of each other can be suppressed.

[0017] In the power storage device according to the present disclosure, each of the plurality of panel components preferably has a closed cross-section extending along the first direction.

[0018] According to the above configuration, when an impact is input to the panel member, the closed cross-section is deformed to absorb the impact. Thereby, the protection of the power storage module can be further enhanced.

Advantages of the Invention

[0019] According to the present disclosure, it is possible to provide a power storage device capable of improving the energy density and enhancing the protection of the power storage module.

Brief Description of the Drawings

[0020]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

MODE FOR CARRYING OUT THE INVENTION

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments shown below, In the embodiments, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

[0022] (Embodiment 1) FIG. 1 is a schematic diagram showing a vehicle according to Embodiment 1. With reference to FIG. 1, the vehicle 100 according to Embodiment 1 will be described.

[0023] The vehicle 100 according to Embodiment 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 with a driving force obtained by electric energy.

[0024] The vehicle 100 includes a power storage device 1, a floor panel 2, front wheels 3, and rear wheels 4. The power storage device 1 is mounted below the floor panel 2.

[0025] FIG. 2 is a top view of the power storage device according to Embodiment 1. FIG. 3 is a bottom view of the power storage device according to Embodiment 1. FIG. 4 is an exploded perspective view of the power storage device according to Embodiment 1. In FIGS. 2 to 4, for convenience, the cover member covering the plurality of power storage modules 10 is omitted. Also, in FIG. 4, for convenience, the attachment member 30 shown in FIGS. 2 and 3 is omitted. The power storage device 1 according to Embodiment 1 will be described with reference to FIGS. 2 to 4.

[0026] As shown in FIGS. 2 to 4, the power storage device 1 includes a plurality of power storage modules 10, a skeleton member 20 for power storage modules, an attachment member 30, a cooler 50, and a panel member 60.

[0027] The plurality of power storage modules 10 are arranged side by side at intervals in the first direction (DR1 direction). The first direction is parallel to, for example, the front-rear direction of the vehicle 100 in the mounted state where the power storage device 1 is mounted on the vehicle.

[0028] Each of the plurality of power storage modules 10 includes a first power storage stack 11 and a second power storage stack 12. The first power storage stack 11 and the second power storage stack 12 are arranged side by side in the first direction.

[0029] The first power storage stack 11 and the second power storage stack 12 include a plurality of power storage cells 13. The plurality of power storage cells 13 are arranged side by side in a second direction (DR2 direction) orthogonal to the first direction. The second direction is parallel to, for example, the width direction of the vehicle in the above-mounted state.

[0030] The power storage cell 13 is, for example, a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery. The power storage cell 13 has, for example, a rectangular shape. The power storage cell 13 may use a liquid electrolyte or a solid electrolyte. Also, the power storage cell 13 may be a unit capacitor configured to be capable of storing electricity.

[0031] The skeletal member 20 for the power storage module is a member that determines the area where each of the plurality of power storage modules 10 is arranged. The skeletal member 20 for the power storage module includes a pair of frame members 25 and 26, a plurality of cross members 21, and an end forming member 27.

[0032] The pair of frame members 25 and 26 extend along the first direction. The pair of frame members 25 and 26 are arranged side by side at intervals in the second direction so that a plurality of power storage modules 10 are located therebetween.

[0033] The pair of frame members 25 and 26 have flange portions 251 and 261 that project outward in the second direction at the central portion in the height direction (DR3 direction) orthogonal to the first direction and the second direction. Incidentally the height direction is parallel to the vertical direction of the vehicle 100 in the above mounting state.

[0034] The flange portion 251 is fixed to the first attachment member 31 so as to sandwich the first attachment member 31 to be described later together with the side end forming member 65 to be described later. The flange portion 261 is fixed to the second attachment member 32 so as to sandwich the second attachment member 32 to be described later together with the side end forming member 66 to be described later.

[0035] The pair of frame members 25 and 26 have end portions 25a and 26a located on one side in the first direction and end portions 25b and 26b located on the other side in the first direction. Incidentally, one side in the first direction refers to the front side in the front-rear direction of the vehicle 100 in the above mounting state, and the other side in the second direction refers to the rear side in the front-rear direction of the vehicle 100.

[0036] The pair of frame members 25 and 26 are made of, for example, metal members. The end forming member 27 connects the end portions 25a and 26b of the pair of frame members 25 and 26 and constitutes one end of the skeletal member 20 for the power storage module on one side in the first direction.

[0037] The plurality of cross members 21 each connect a pair of frame members 25 and 26 so as to partition the region where each of the plurality of power storage modules 10 is arranged. The plurality of cross members 21 extend along the second direction. One end of the cross member 21 located on one side in the second direction is connected to the frame member 25, and the other end of the cross member 21 located on the other side in the second direction is connected to the frame member 26. The plurality of cross members 21 are arranged side by side in the first direction with an interval therebetween. The plurality of cross members 21 are constituted by, for example, metal members.

[0038] The attachment member 30 is a member for attaching the power storage device 1 to the vehicle body. The attachment member 30 includes a first attachment member 31 and a second attachment member 32.

[0039] The first attachment member 31 is fixed to the frame member 25 so as to protrude outward in the second direction from the frame member 25. The first attachment member 31 is attached to, for example, the side frame member on the right side of the vehicle.

[0040] The second attachment member 32 is fixed to the frame member 26 so as to protrude outward in the second direction from the frame member 26. The second attachment member 32 is attached to, for example, the side frame member on the left side of the vehicle.

[0041] The panel member 60 covers the plurality of power storage modules 10 and protects the plurality of power storage modules 10. Specifically, the panel member 60 covers the plurality of power storage modules 10 from below. The panel member 60 includes a plurality of panel constituent members 61, an end forming member 64, a pair of side end forming members 65 and 66, and a plurality of fixing members 67.

[0042] The plurality of panel constituent members 61 extend along the first direction. The plurality of panel constituent members 61 are arranged side by side in the second direction so that adjacent gaps are blocked. The plurality of panel constituent members 61 include a first constituent member 62 and a second constituent member 63 adjacent to each other in the second direction. The specific shapes of the first constituent member 62 and the second constituent member 63 will be described later with reference to FIG. 6.

[0043] The end forming member 64 is connected to the ends of a plurality of panel constituting members 61 located on one side in the first direction, and forms one end side of the panel member 60 in the first direction. The end forming member 64 is fixed to the above-described end forming member 27. Specifically, for example, the end forming member 64 is fastened to the end forming member 27 by a fastening member (not shown).

[0044] The side end forming member 65 is connected to the panel constituting member 61 located on the outermost side in the second direction. The side end forming member 65 extends along the first direction. The side end forming member 65 forms the end of the panel member 60 on one side in the second direction.

[0045] The side end forming member 66 is connected to the panel constituting member 61 located on the outermost side in the other direction of the second direction. The side end forming member 66 extends along the first direction. The side end forming member 66 forms the end of the panel member 60 on the other side in the second direction.

[0046] The plurality of fixing members 67 are members for fixing the plurality of panel constituting members 61 and the pair of side end forming members 65, 66. The plurality of fixing members 67 extend along the second direction. The plurality of fixing members 67 extend along the second direction so as to straddle the pair of side end forming members 65, 66 and the plurality of panel constituting members 61. The plurality of fixing members 67 are arranged side by side at intervals in the first direction. The plurality of fixing members 67 are arranged at positions corresponding to the plurality of cross members 21.

[0047] The plurality of panel constituting members 61 and the pair of side end forming members 65, 66 are fixed to the plurality of fixing members 67. Specifically, for example, the plurality of panel constituting members 61 and the pair of side end forming members 65, 66 are fixed to the plurality of fixing members 67 by fastening members 70 (see FIG. 5).

[0048] The cooler 50 is a device for cooling a plurality of power storage modules 10. The cooler 50 is disposed between the plurality of power storage modules 10 and the panel member 60. The cooler 50 has a plurality of cooling parts that are in thermal contact with the plurality of power storage modules 10. Note that the plurality of cooling parts are constituted by a plurality of main flow path forming parts 55 described later.

[0049] The cooler 50 includes a main body part 51, a flow path forming part 52 that forms a refrigerant flow path through which refrigerant flows, a refrigerant introduction part 56, and a refrigerant discharge part 57. The main body part 51 is provided in a plate shape. The flow path forming part 52 is provided on the main body part 51.

[0050] The refrigerant introduced into the refrigerant flow path from the refrigerant introduction part 56 cools the plurality of power storage modules 10 and is discharged from the refrigerant discharge part 57.

[0051] The flow path forming part 52 has an introduction flow path forming part 53, a plurality of main flow path forming parts 55, and a discharge flow path forming part 54. The introduction flow path forming part 53 connects the refrigerant introduction part 56 and the inlet side of the plurality of main flow path forming parts 55. The discharge flow path forming part 54 connects the refrigerant discharge part 57 and the outlet side of the plurality of main flow path forming parts 55.

[0052] The plurality of main flow path forming parts 55 extend along a second direction. The plurality of main flow path forming parts 55 are arranged side by side with an interval in a first direction. The plurality of main flow path forming parts 55 are provided at positions corresponding to the plurality of power storage modules 10. The plurality of main flow path forming parts 55 are in thermal contact with the bottoms of the plurality of power storage modules 10. Thereby, the plurality of power storage modules 10 can be cooled by the refrigerant flowing through the main flow path forming part 55.

[0053] The cross member 21 is installed on the upper surface of the main body part 51 located between the mutually adjacent main flow path forming parts 55.

[0054] Each of the plurality of main flow path forming portions 55 includes a first flow path forming portion 551 and a second flow path forming portion 552. The first flow path forming portion 551 and the second flow path forming portion 552 extend along the second direction and are arranged side by side in the first direction. The first flow path forming portion 551 is provided at a position corresponding to the first power storage stack 11. The second flow path forming portion 552 is provided at a position corresponding to the second power storage stack 12.

[0055] FIG. 5 is a schematic cross-sectional view of the power storage device along the V-V line shown in FIG. 2. With reference to FIG. 5, the details of the cross member 21 and the fixing member 67 will be described.

[0056] The panel constituent member 61 is fixed to the fixing member 67 by a fastening member 70. In FIG. 5, although not shown, a pair of side end forming members 65, 66 are also fixed to the fixing member 67 by the fastening member 70. The cooler 50 is provided with a retreat portion 59 that retreats upward to avoid interference with the tip of the fastening member 70.

[0057] The cross member 21 has a frame-shaped main body portion 22, a first flange portion 23, and a second flange portion 24. The first flange portion 23 is provided so as to protrude from the lower end of the main body portion 22 to one side in the first direction. The second flange portion 24 is provided so as to protrude from the lower end of the main body portion 22 to the other side in the first direction.

[0058] The fixing member 67 has a substantially U-shaped main body portion 671, a third flange portion 672, and a fourth flange portion 673. The third flange portion 672 is provided so as to protrude from the upper end of the main body portion 671 located on one side in the first direction to one side in the first direction. The fourth flange portion 673 is provided so as to protrude from the upper end of the main body portion 671 located on the other side in the first direction to the other side in the first direction.

[0059] The first flange portion 23 and the third flange portion 672 are fixed to the cooler 50 so as to sandwich the upper surface of the cooler 50 at a portion located between the main flow path forming portions 55 adjacent to each other. Similarly, the second flange portion 24 and the fourth flange portion 673 are fixed to the cooler 50 so as to sandwich the upper surface of the cooler 50 at a portion located between the main flow path forming portions 55 adjacent to each other. The fixing manner to the cooler 50 may be welding or fastening and fixing with a fastening member (not shown).

[0060] In this way, by fixing the cross member 21 and the fixing member 67, the panel member 60 is fixed to the cross member 21.

[0061] FIG. 6 is a cross-sectional view of the power storage device taken along line VI-VI shown in FIG. 2. With reference to FIG. 6, the details of the panel constituent member 61 will be described.

[0062] The panel constituent member 61 has a first cylindrical portion 611, a second cylindrical portion 612, and a connecting portion 617. The first cylindrical portion 611 is located on one side in the second direction, and the second cylindrical portion 612 is located on the other side in the second direction. The first cylindrical portion 611 and the second cylindrical portion 612 extend along the first direction and form a closed cross section. The connecting portion 617 has a flat plate shape and connects the first cylindrical portion 611 and the second cylindrical portion 612.

[0063] The first cylindrical portion 611 includes an upper wall portion 611a, a bottom wall portion 611b, and a pair of side wall portions 613, 614.

[0064] The upper wall portion 611a has a first portion 611a1 and a second portion 611a2. The first portion 611a1 and the second portion 611a2 have a flat plate shape. The second portion 611a2 is located on one side in the second direction with respect to the first portion 611a1. The second portion 611a2 is located at a lower position than the first portion 611a1, and a stepped portion 611a3 is formed between the second portion 611a2 and the first portion 611a1. The stepped portion 611a3 is a portion connecting the end of the second portion 611a2 located on the other side in the second direction and the end of the first portion 611a1 located on one side in the second direction. The bottom wall portion 611b has a flat plate shape.

[0065] The side wall portion 613 connects the ends of the upper wall portion 611a and the bottom wall portion 611b located on one side in the second direction. The side wall portion 613 extends in a direction parallel to the height direction (vertical direction). The side wall portion 613 is provided with a first extending portion 6131 and a second extending portion 6132.

[0066] The first extending portion 6131 extends from the upper end of the side wall portion 613 toward one side in the second direction. The second extending portion 6132 extends from between the upper end and the lower end of the side wall portion 613 toward one side in the second direction. The second extending portion 6132 is provided so as to protrude more toward one side in the second direction than the first extending portion 6131.

[0067] The side wall portion 613, the first extending portion 6131, and the second extending portion 6132 constitute the end of the panel component 61 located on one side in the second direction.

[0068] The side wall portion 614 connects the ends of the upper wall portion 611a and the bottom wall portion 611b located on the other side in the second direction. The side wall portion 614 inclines upward as it goes toward the other side in the first direction.

[0069] The second cylindrical portion 612 includes an upper wall portion 612a, a bottom wall portion 612b, and a pair of side wall portions 615, 616.

[0070] The upper wall portion 612a has a flat plate shape. The upper wall portion 612a is configured flush with the first portion 611a1. The upper wall portion 612a is provided at the same height position as the first portion 611a1. The bottom wall portion 612b has a flat plate shape. The bottom wall portion 612b is provided at the same height position as the bottom wall portion 611b. The end portion of the bottom wall portion 612b located on the other side in the second direction is located on one side in the second direction rather than the end portion of the upper wall portion 612a located on the other side in the second direction.

[0071] The side wall portion 615 connects the end portions of the upper wall portion 612a and the bottom wall portion 612b located on the other side in the second direction. The side wall portion 615 has, for example, a crank shape. The side wall portion 615 is provided with a receiving portion for receiving the second extending portion 6132. The receiving portion is constituted by a recess that is recessed on one side in the second direction provided in the side wall portion 615. The side wall portion 615 is provided with a third extending portion 6151 and a fourth extending portion 6152.

[0072] The third extending portion 6151 extends from the upper end of the side wall portion 615 toward the other side in the second direction. The fourth extending portion 6152 extends from between the lower end of the side wall portion 615 toward the other side in the second direction. The third extending portion 6151 is provided so as to protrude on the other side in the second direction rather than the fourth extending portion 6152.

[0073] The end portion of the panel constituent member 61 located on the other side in the second direction is constituted by the side wall portion 615, the third extending portion 6151, and the fourth extending portion 6152.

[0074] The side wall portion 616 connects the end portions of the upper wall portion 611a and the bottom wall portion 611b located on one side in the second direction. The side wall portion 616 inclines upward as it goes toward one side in the second direction.

[0075] The fastening member 70 penetrates through the connecting portion 617, and the panel constituent member 61 is fixed to the fixing member 67 at the connecting portion 617. As described above, since the side wall portion 614 and the side wall portion 616 have a taper, a wide working space can be secured, and the workability of the fastening work can be improved.

[0076] In this embodiment, the first component member 62 and the second component member 63 have the same shape as the panel component member 61 described above. Also, the first component member 62 and the second component member 63 are made of the same type of metal member such as aluminum, for example. Also, the first component member 62 and the second component member 63 are preferably formed by extrusion molding.

[0077] By configuring the first component member 62 and the second component member 63 with the same type of members having the same shape as described above, the types of parts can be reduced to form the panel member, so that the manufacturing cost can be reduced. Also, when the first component member 62 and the second component member 63 are made of aluminum, they can be easily formed by extrusion molding and the weight can be reduced.

[0078] FIG. 7 is an enlarged view showing an enlarged area indicated by line VII shown in FIG. 6. With reference to FIG. 7, the installation mode of the first component member 62 and the second component member 63 adjacent to each other in the second direction will be described.

[0079] As shown in FIG. 7, the end portion of the first component member 62 located on the second component member 63 and the end portion of the second component member 63 located on the first component member 62 side include contact portions that contact each other in the vertical direction, and the gap between the first component member 62 and the second component member 63 is sealed by the contact portions.

[0080] Specifically, the first component member 62 and the second component member 63 have side wall portions 613 and 615 facing each other in the second direction, and the first extending portion 6131 provided on the side wall portion 613 and the third extending portion 6151 provided on the side wall portion 615 contact each other in the vertical direction, so that the gap between the first component member 62 and the second component member 63 is sealed. The first extending portion 6131 and the third extending portion 6151 correspond to the contact portions. In this way, by sealing the gap between the first component member 62 and the second component member 63, the intrusion of water from the road surface side to the power storage module 10 side can be suppressed.

[0081] Furthermore, a labyrinth structure is formed by the end of the first component member 62 located on the second component member 63 and the end of the second component member 63 located on the first component member 62 side.

[0082] Specifically, a labyrinth structure is formed when the tip side of the second extending portion 6132 provided on the side wall portion 613 enters between the recess formed in the side wall portion 615 and the fourth extending portion 6152. Thereby, the intrusion of water from the road surface side to the power storage module side can be further suppressed.

[0083] Since the thermal expansion on one side of the first component member and the second component member can be suppressed, the reaction force acting by the mutually expanded portions hitting against each other can be suppressed, and the mutual distortion can be suppressed.

[0084] As described above, in the power storage device 1 according to the present embodiment, a plurality of cross members are provided so as to extend in the first direction, and a plurality of panel constituent members constituting the panel member are provided so as to extend in the second direction, whereby the durability against impacts from any direction of the first direction and the second direction can be enhanced.

[0085] Furthermore, a plurality of cross members 21 are arranged side by side in the second direction so that each of a pair of frame members 25 and 26 extending along the first direction is connected, and the power storage module 10 can be arranged between the adjacent cross members 21. Thereby, a plurality of power storage modules 10 can be arranged with their orientations unified, and the mounting efficiency of the power storage module 10 can also be improved. As a result, the energy density can also be improved.

[0086] Also, as described above, by arranging the panel member 60 below the plurality of power storage modules 10 and covering the plurality of power storage modules 10 from the lower side with the panel member 60, it is possible to prevent the plurality of power storage modules 10 from directly interfering with the road surface.

[0087] In addition, when the panel component 61 has a closed cross-section extending along the first direction, for example, when an impact is input to the panel member 60 from a road surface or the like, the closed cross-section can be deformed to absorb the impact. As a result, the protection of the power storage module 10 can be further enhanced.

[0088] In the above-described embodiment, the case where the first component 62 and the second component 63 are composed of the same type of members having the same shape has been illustrated and described. However, the first component 62 and the second component 63 may be composed of metal members having different coefficients of thermal expansion. In this case, by being composed of metal members, while maintaining the strength, the thermal expansion on one side of the first component 62 and the second component 63 can be suppressed. For this reason, the reaction force acting by the mutually expanded portions hitting each other can be suppressed, and the mutual distortion can be suppressed.

[0089] (Embodiment 2) FIG. 8 is a partial cross-sectional view of the power storage device according to Embodiment 2. Note that FIG. 8 is a drawing corresponding to the portion along the line VI-VI shown in FIG. 2. With reference to FIG. 8, the power storage device 1A according to Embodiment 2 will be described.

[0090] As shown in FIG. 8, the power storage device 1A according to Embodiment 2 is different in that protruding portions 618 and 619 protruding toward the fastening member 70 side are provided in a region for fastening the panel component 61 when compared with the power storage device 1 according to Embodiment 1. The other configurations are substantially the same.

[0091] The protruding portion 618 protrudes from the end of the bottom wall portion 611b located on the other side in the second direction toward the other side in the second direction. The protruding portion 619 protrudes from the bottom wall portion 612b located on one side in the second direction toward one side in the second direction. A gap into which the fastening member 70 can be inserted is formed between the protruding portion 618 and the protruding portion 619.

[0092] Even when configured in this way, the power storage device 1A according to Embodiment 2 can obtain substantially the same effects as those of Embodiment 1.

[0093] In addition, by providing the protruding portions 618 and 619, it is possible to prevent foreign matter from interfering with the fastening member 70 from the road surface side and water from entering the fastening portion.

[0094] (Embodiment 3) FIG. 9 is a partial cross-sectional view of the power storage device according to Embodiment 3. With reference to FIG. 9, the power storage device 1B according to Embodiment 3 will be described.

[0095] As shown in FIG. 9, the power storage device 1B according to Embodiment 3 has a different configuration of the panel member 60B when compared with the power storage device 1 according to Embodiment 1. The other configurations are substantially the same.

[0096] The panel member 60B includes a plurality of first panel constituent members 62B and a second panel constituent member 63B. The second panel constituent member 63B has, for example, a substantially flat plate shape.

[0097] The plurality of first panel constituent members 62B are arranged side by side at intervals in the second direction. The plurality of first panel constituent members 62B are provided so as to extend in the first direction. The plurality of first panel constituent members 62B are fixed to the second panel constituent member 63B.

[0098] The first panel constituent member 62B has a substantially U-shaped main body portion 621B and flange portions 622B and 623B. The flange portion 622B extends from the upper end of the main body portion 621B located on one side in the second direction toward one side in the second direction. The flange portion 623B extends from the upper end of the main body portion 621B located on the other side in the second direction toward the other side in the second direction.

[0099] The flange portions 622B and 623B are fixed to the second panel constituent member 63B by welding or a fastening member or the like. Thereby, the plurality of first panel constituent members 62B are fixed to the second panel constituent member 63B.

[0100] Even when configured as described above, since the plurality of first panel constituent members 62B extending in the first direction are arranged side by side in the second direction, the power storage device 1B according to Embodiment 3 can obtain substantially the same effects as those of Embodiment 1.

[0101] In addition, in the above-described Embodiments 1 to 3, the case where the panel member covers the plurality of power storage modules from the lower side has been exemplified and described. However, the position of the panel member is not limited to below the plurality of power storage modules. As long as it is possible to cover (arrange side by side with) the panel member, the panel member may be located above the plurality of power storage modules or may be located on the side of the plurality of power storage modules.

[0102] The embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims, and includes all modifications within the meaning and scope equivalent to the scope of the claims.

Description of Reference Numerals

[0103] 1, 1A, 1B energy storage device, 2 floor panel, 3 front wheel, 4 rear wheel, 10 energy storage module, 11 first energy storage stack, 12 second energy storage stack, 13 energy storage cell, 20 skeleton member for energy storage module, 21 cross member, 22 main body part, 23 first flange part, 24 second flange part, 25, 26 frame members, 25a, 25b, 26a, 26b ends, 27 end forming member, 30 mounting member, 31 first mounting member, 32 second mounting member, 50 cooler, 51 main body part, 52 flow path forming part, 53 introduction flow path forming part, 54 discharge flow path forming part, 55 main flow path forming part, 56 refrigerant introduction part, 57 refrigerant discharge part, 59 retreat part, 60, 60B panel members, 61 panel constituent member, 62 first constituent member, 62B first panel constituent member, 63 second constituent member, 63B second panel constituent member, 64 end forming member, 65, 66 side end forming members, 67 fixing member, 70 fastening member, 100 vehicle, 251, 261 flange parts, 551 first flow path forming part, 552 second flow path forming part, 611 first cylindrical part, 611a upper wall part, 611a1 first part, 611a2 second part, 611a3 step part, 611b bottom wall part, 612 second cylindrical part, 612a upper wall part, 612b bottom wall part, 613, 614, 615, 616 side wall parts, 617 connection part, 618, 619 protruding parts, 621B main body part, 622B, 623B flange parts, 671 main body part, 672 third flange part, 673 Fourth flange part, 6131 first extending part, 6132 second extending part, 6151 third extending part, 6152 fourth extending part.

Claims

1. A pair of power storage stacks; A panel member disposed below the pair of power storage stacks; a cooler disposed between the pair of power storage stacks and the panel member; A fixing member fixed to a lower surface of the cooler; a plurality of fastening members for fastening the panel member to the fixing member; a cross member disposed between the pair of power storage stacks and on an upper surface of the cooler; The cooler comprises: A pair of main flow path forming portions disposed below each of the power storage stacks; a connecting portion connecting the pair of main flow path forming portions to each other, the cross member is disposed between the pair of power storage stacks and on an upper surface of the connecting portion of the cooler, The fixing member is fixed to a lower surface of a portion of the cooler that overlaps with the cross member in the vehicle up-down direction, The multiple fastening members are spaced apart along a longitudinal direction of the cross member.

2. The storage device as described in claim 1, wherein the cross member has an internal gap.

3. The storage device as described in claim 1, wherein an upper surface of the panel member and a lower surface of the cooler are spaced apart from each other.

4. The fixing member has a first body portion and a second body portion each extending from the cooler toward the panel member, The power storage device according to claim 1 , wherein the fastening member is located between the first main body portion and the second main body portion.

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