Power 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 an electricity storage device mounted on a vehicle. [Background technology]

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

[0003] Specifically, the front end member of the outer frame member is connected to the 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 framework of the vehicle. An opening is provided at the bottom of the outer frame member to enhance heat dissipation from the battery, and the battery is exposed from the opening toward the bottom of the vehicle body. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-176751 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the configuration disclosed in Patent Document 1, an opening is provided in the bottom of the outer frame member, which reduces the strength of the bottom, and there is a concern that impact resistance may also decrease.

[0006] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide an electricity storage device that can improve durability against impact. [Means for solving the problem]

[0007] An energy storage device according to the present disclosure includes a plurality of energy storage modules, a pair of frame members extending along a first direction and arranged side by side in a second direction perpendicular to the first direction so that the plurality of energy storage modules are located therebetween, a plurality of cross members each connecting the pair of frame members so as to partition an area in which each of the plurality of energy storage modules is arranged, and a panel member covering the plurality of energy 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 extending along the first direction and arranged side by side in the second direction.

[0008] According to the above configuration, multiple cross members are arranged to extend in a first direction, and multiple panel constituent members constituting the panel member are arranged to extend in a second direction, thereby increasing durability against impacts from either the first direction or the second direction.

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

[0010] According to the above configuration, the gap between the first component and the second component is sealed by the abutment portion, thereby making it possible to prevent water from entering from the outside of the panel member into the energy storage module without using any other components.

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

[0012] According to the above configuration, a labyrinth structure is formed by the end of the first component member and the end of the second component member, thereby further preventing water from entering from the road surface side to the electricity storage module side.

[0013] In the power storage device based on the present disclosure, the first component member and the second component member may be configured from the same type of material having the same shape.

[0014] According to the above-described configuration, the panel member can be formed using a reduced number of different parts, thereby reducing manufacturing costs.

[0015] In the power storage device based on the present disclosure, the first component member and the second component member may be made of metal members having different thermal expansion coefficients.

[0016] Since thermal expansion of one side of the first component and the second component can be suppressed, the reaction force acting when the expanded parts bump into each other can be suppressed, and distortion of the two components can be suppressed.

[0017] In the power storage device based on 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 applied to the panel member, the closed cross section deforms, thereby making it possible to absorb the impact, thereby further improving the protection of the electricity storage module. Effect of the Invention

[0019] According to the present disclosure, it is possible to provide an energy storage device that can improve the energy density and enhance the protection of the energy storage module. [Brief description of the drawings]

[0020] [Figure 1]1 is a schematic diagram showing a vehicle according to a first embodiment. [Diagram 2] FIG. 2 is a top view of the power storage device according to the first embodiment. [Diagram 3] 2 is a bottom view of the power storage device according to the first embodiment. FIG. [Figure 4] FIG. 2 is an exploded perspective view of the electricity storage device according to the first embodiment. [Diagram 5] 3 is a schematic cross-sectional view of the electricity storage device taken along line VV shown in FIG. 2. [Figure 6] 3 is a schematic cross-sectional view of the electricity storage device taken along line VI-VI shown in FIG. 2. [Figure 7] 7 is an enlarged view showing an area indicated by line VII in FIG. 6. [Figure 8] 11 is a partial cross-sectional view of an electricity storage device according to a second embodiment. FIG. [Figure 9] 11 is a partial cross-sectional view of an electricity storage device according to a third embodiment. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments, the same or common parts are given the same reference symbols in the drawings and their descriptions 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, a vehicle 100 according to embodiment 1 will be described.

[0023] Vehicle 100 according to the first embodiment is a hybrid vehicle capable of running using at least one of the power of a motor and an engine, or an electric vehicle that runs using driving force obtained from electric energy.

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

[0025] Fig. 2 is a top view of the energy storage device according to embodiment 1. Fig. 3 is a bottom view of the energy storage device according to embodiment 1. Fig. 4 is an exploded perspective view of the energy storage device according to embodiment 1. For convenience, cover members covering a plurality of energy storage modules 10 are omitted in Figs. 2 to 4. Also, for convenience, the mounting member 30 shown in Figs. 2 and 3 is omitted in Fig. 4. The energy 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 energy storage device 1 includes a plurality of energy storage modules 10, a framework member 20 for the energy storage modules, a mounting member 30, a cooler 50, and a panel member 60.

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

[0028] Each of the multiple 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 a first direction.

[0029] The first power storage stack 11 and the second power storage stack 12 each 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) perpendicular to the first direction. Note that the second direction is, for example, parallel to the width direction of the vehicle in the mounted state.

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

[0031] The energy storage module framework member 20 is a member that determines an area in which each of the multiple energy storage modules 10 is arranged. The energy storage module framework member 20 includes a pair of frame members 25, 26, multiple cross members 21, and an end portion forming member 27.

[0032] The pair of frame members 25, 26 extend along the first direction. The pair of frame members 25, 26 are arranged side by side at a distance from each other in the second direction such that the multiple power storage modules 10 are located between them.

[0033] The pair of frame members 25, 26 have flanges 251, 261 at the center in the height direction (DR3 direction) perpendicular to the first direction and the second direction, which protrude outward in the second direction. In the mounted state, the height direction is parallel to the up-down direction of the vehicle 100.

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

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

[0036] The pair of frame members 25, 26 are made of, for example, a metal member. The end portion forming member 27 connects the ends 25a, 26b of the pair of frame members 25, 26, and forms one end of the energy storage module framework member 20 on one side in the first direction.

[0037] The multiple cross members 21 each connect a pair of frame members 25, 26 so as to partition an area in which each of the multiple power storage modules 10 is arranged. The multiple 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 multiple cross members 21 are arranged side by side in the first direction with gaps between them. The multiple cross members 21 are formed, for example, from a metal member.

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

[0039] The first mounting 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 mounting member 31 is attached, for example, to a side frame member on the right side of the vehicle.

[0040] The second mounting 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 mounting member 32 is attached, for example, to a left side frame member of the vehicle.

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

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

[0043] The end portion forming member 64 is connected to the ends of the multiple panel constituent 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 portion forming member 64 is fixed to the end portion forming member 27 described above. Specifically, for example, the end portion forming member 64 is fastened to the end portion forming member 27 by a fastening member (not shown).

[0044] The side end forming member 65 is connected to the panel component 61 located on the furthest side in the second direction. The side end forming member 65 extends along the first direction. The side end forming member 65 forms an 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 component 61 located on the other side in the second direction. The side end forming member 66 extends along the first direction. The side end forming member 66 forms an end of the panel component 60 on the other side in the second direction.

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

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

[0048] The cooler 50 is a device for cooling the multiple power storage modules 10. The cooler 50 is disposed between the multiple power storage modules 10 and a panel member 60. The cooler 50 has multiple cooling sections in thermal contact with the multiple power storage modules 10. The multiple cooling sections are configured by multiple main flow path forming sections 55 described below.

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

[0050] The coolant introduced into the coolant flow path from coolant inlet portion 56 cools the multiple power storage modules 10 and is discharged from coolant outlet portion 57.

[0051] The flow path forming section 52 has an inlet flow path forming section 53, a plurality of main flow path forming sections 55, and a discharge flow path forming section 54. The inlet flow path forming section 53 connects a coolant inlet section 56 and the inlet sides of the plurality of main flow path forming sections 55. The discharge flow path forming section 54 connects a coolant discharge section 57 and the outlet sides of the plurality of main flow path forming sections 55.

[0052] The multiple main flow path forming parts 55 extend along the second direction. The multiple main flow path forming parts 55 are arranged side by side at intervals in the first direction. The multiple main flow path forming parts 55 are provided at positions corresponding to the multiple power storage modules 10. The multiple main flow path forming parts 55 are in thermal contact with the bottoms of the multiple power storage modules 10. This allows the multiple power storage modules 10 to be cooled by the refrigerant flowing through the main flow path forming parts 55.

[0053] The cross member 21 is disposed on the upper surface of the main body portion 51 located between adjacent main flow path forming portions 55.

[0054] Each of the multiple 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 electricity storage device taken along line VV shown in Fig. 2. With reference to Fig. 5, the cross member 21 and the fixing member 67 will be described in detail.

[0056] The panel component 61 is fixed to the fixing member 67 by fastening members 70. Although not shown in Fig. 5, the pair of side end forming members 65, 66 are also fixed to the fixing member 67 by fastening members 70. The cooler 50 is provided with a retraction section 59 that retracts 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] Fixing member 67 has a generally U-shaped main body 671, a third flange 672, and a fourth flange 673. Third flange 672 is provided so as to protrude from an upper end of main body 671 located on one side in the first direction to one side in the first direction. Fourth flange 673 is provided so as to protrude from an upper end of main body 671 located on the other side in the first direction to the other side in the first direction.

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

[0060] In this manner, 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 electricity storage device taken along line VI-VI shown in Fig. 2. With reference to Fig. 6, details of panel component 61 will be described.

[0062] The panel component 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 walls 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 than the first portion 611a1. The second portion 611a2 is located at a lower position than the first portion 611a1, and a step portion 611a3 is formed between the second portion 611a2 and the first portion 611a1. The step portion 611a3 is a portion that connects an end of the second portion 611a2 located on the other side in the second direction and an 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 is a portion of the upper wall portion 611a and the bottom wall portion 611b located on one side in the second direction. The ends are connected to each other. The side wall portion 613 extends in a direction parallel to the height direction (up and down direction). The side wall portion 613 is provided with a first extending portion 6131 and a second extending portion 6132.

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

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

[0068] The side wall portion 614 connects ends of the top wall portion 611a and the bottom wall portion 611b located on the other side in the second direction. The side wall portion 614 is inclined upward as it approaches 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 walls 615 and 616.

[0070] The upper wall portion 612a has a flat plate shape. The upper wall portion 612a is configured to be flush with the first portion 611a1. The upper wall portion 612a is provided at the same height 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 as the bottom wall portion 611b. An 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 with respect to an 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 ends of the top 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 that receives the second extension portion 6132. The receiving portion is configured by a recess that is provided in the side wall portion 615 and recessed toward one side in the second direction. The side wall portion 615 is provided with a third extension portion 6151 and a fourth extension portion 6152.

[0072] The third extension portion 6151 extends toward the other side in the second direction from the upper end of the side wall portion 615. The fourth extension portion 6152 extends toward the other side in the second direction from between the lower end of the side wall portion 6155. The third extension portion 6151 is provided so as to protrude further toward the other side in the second direction than the fourth extension portion 6152.

[0073] The side wall portion 615, the third extending portion 6151, and the fourth extending portion 6152 form an end portion of the panel component 61 located on the other side in the second direction.

[0074] The side wall portion 616 connects ends of the top wall portion 611a and the bottom wall portion 611b located on one side in the second direction. The side wall portion 616 is inclined upward as it approaches one side in the second direction.

[0075] The fastening member 70 passes through the connection portion 617, and the panel constituent member 61 is fixed to the fixing member 67 at the connection portion 617. As described above, by having the side wall portion 614 and the side wall portion 616 tapered, a large working space can be secured, and the workability of the fastening work can be improved.

[0076] In this embodiment, the first component 62 and the second component 63 have the same shape as the panel component 61 described above. The component member 63 is made of the same kind of metal material, such as aluminum, etc. The first component member 62 and the second component member 63 are preferably formed by extrusion molding.

[0077] As described above, by constructing the first component 62 and the second component 63 from the same type of material having the same shape, the panel member can be formed with a reduced number of types of parts, thereby reducing manufacturing costs. Also, when the first component 62 and the second component 63 are made of aluminum, they can be easily extruded and the weight can be reduced.

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

[0079] As shown in Figure 7, 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 include abutment portions that abut against 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 abutment 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 a first extension portion 6131 provided on the side wall portion 613 and a third extension portion 6151 provided on the side wall portion 615 abut against each other in the vertical direction, thereby sealing the gap between the first component member 62 and the second component member 63. The first extension portion 6131 and the third extension portion 6151 correspond to the above-mentioned abutment portion. In this manner, the gap between the first component member 62 and the second component member 63 is sealed, thereby making it possible to suppress the intrusion of water from the road surface side to the electricity storage module 10 side.

[0081] Furthermore, 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 form a labyrinth structure.

[0082] Specifically, a labyrinth structure is formed by inserting the tip side of second extension portion 6132 provided on side wall portion 613 between the recess formed in side wall portion 615 and fourth extension portion 6152. This makes it possible to further suppress the intrusion of water from the road surface side to the electricity storage module side.

[0083] Since thermal expansion of one side of the first component and the second component can be suppressed, the reaction force acting when the expanded parts bump into each other can be suppressed, and distortion of the two components can be suppressed.

[0084] As described above, in the energy storage device 1 of this embodiment, multiple cross members are arranged to extend in a first direction, and multiple panel components constituting the panel member are arranged to extend in a second direction, thereby making it possible to increase durability against impacts from either the first direction or the second direction.

[0085] Furthermore, a plurality of cross members 21 are arranged side by side in the second direction so as to connect a pair of frame members 25, 26 extending along the first direction, and the energy storage modules 10 can be arranged between adjacent cross members 21. This allows the plurality of energy storage modules 10 to be arranged with the same orientation, and also improves the mounting efficiency of the energy storage modules 10. As a result, the energy density can also be improved.

[0086] Furthermore, as described above, by placing the panel member 60 below the multiple energy storage modules 10 and covering the multiple energy storage modules 10 from below with the panel member 60, it is possible to prevent the multiple energy storage modules 10 from directly interfering with the road surface.

[0087] Furthermore, in the case where the panel component 61 has a closed cross section extending along the first direction, for example, when an impact is input to the panel component 60 from a road surface or the like, the closed cross section deforms to absorb the impact. This can further enhance the protection of the electricity storage module 10.

[0088] In the above embodiment, the first component 62 and the second component 63 are made of the same type of material having the same shape, but the first component 62 and the second component 63 may be made of metal materials with different thermal expansion coefficients. In this case, the strength is maintained by making them of metal materials, and thermal expansion of one side of the first component 62 and the second component 63 can be suppressed. Therefore, the reaction force acting when the expanded parts butt against each other can be suppressed, and distortion of each other can be suppressed.

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

[0090] 8, energy storage device 1A according to embodiment 2 differs from energy storage device 1 according to embodiment 1 in that protrusions 618, 619 that protrude toward fastening member 70 are provided in an area for fastening panel component 61. The other configurations are substantially the same.

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

[0092] Even when configured in this manner, the power storage device 1A according to the second embodiment can achieve substantially the same effects as those of the first embodiment.

[0093] Furthermore, the provision of the protrusions 618, 619 can prevent foreign objects from interfering with the fastening member 70 from the road surface side and prevent water from entering the fastening portion.

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

[0095] 9, an energy storage device 1B according to embodiment 3 differs from the energy storage device 1 according to embodiment 1 in the configuration of a panel member 60B. 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 multiple first panel components 62B are arranged side by side at intervals in the second direction. The first panel components 62B are provided so as to extend in the first direction. The first panel components 62B are fixed to the second panel components 63B.

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

[0099] The flange portions 622B, 623B are fixed to the second panel component member 63B by welding or fastening members, etc. In this way, the plurality of first panel component members 62B are fixed to the second panel component member 63B.

[0100] Even when configured as described above, the energy storage device 1B of embodiment 3 achieves substantially the same effect as embodiment 1 by arranging multiple first panel components 62B extending in the first direction side by side in the second direction.

[0101] In the above-mentioned first to third embodiments, the case where the panel member covers the multiple power storage modules from below has been described as an example, but the position of the panel member is not limited to below the multiple power storage modules. As long as it is possible to cover the panel member (to be arranged alongside the panel member), the panel member may be located above the multiple power storage modules or to the side of the multiple power storage modules.

[0102] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, and includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0103] 1, 1A, 1B Electricity storage device, 2 Floor panel, 3 Front wheel, 4 Rear wheel, 10 Electricity storage module, 11 First electricity storage stack, 12 Second electricity storage stack, 13 Electricity storage cell, 20 Frame member for electricity storage module, 21 Cross member, 22 Main body, 23 First flange, 24 Second flange, 25, 26 Frame member, 25a, 25b, 26a, 26b End, 27 End forming member, 30 Mounting member, 31 First mounting member, 32 Second mounting member, 50 Cooler, 51 Main body, 52 Flow path forming portion, 53 Inlet flow path forming portion, 54 Outlet flow path forming portion, 55 Main flow path forming portion, 56 Coolant introduction portion, 57 Coolant discharge portion, 59 Evacuation portion, 60, 60B Panel member, 61 Panel component member, 62 First component member, 62B First panel component, 63 Second component, 63B Second panel component, 64 End forming member, 65, 66 Side end forming member, 67 Fixing member, 70 Fastening member, 100 Vehicle, 251, 261 Flange portion, 551 First flow passage forming portion, 552 Second flow passage forming portion, 611 First cylindrical portion, 611a Upper wall portion, 611a1 First portion, 611a2 Second portion, 611a3 Step portion, 611b Bottom wall portion, 612 Second cylindrical portion, 612a Upper wall portion, 612b Bottom wall portion, 613, 614, 615, 616 Side wall portion, 617 Connection portion, 618, 619 Protruding portion, 621B Main body portion, 622B, 623B Flange portion, 671 Main body portion, 672 Third brim, 673 4th flange part, 6131 1st extension part, 6132 2nd extension part, 6151 3rd extension part, 6152 4th extension part.

Claims

1. A plurality of power storage modules; a pair of frame members extending along a first direction and arranged side by side in a second direction perpendicular to the first direction such that the plurality of power storage modules are located therebetween; a plurality of cross members each connecting the pair of frame members so as to define an area in which each of the plurality of power storage modules is disposed; a panel member covering the plurality of power storage modules, The 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 extending along the first direction and arranged side by side in the second direction.

2. The plurality of panel components include a first component and a second component adjacent to each other in the second direction, an end portion of the first component member located on the second component member side and an end portion of the second component member located on the first component member side include abutting portions that abut against each other in a direction in which the plurality of power storage modules and the panel member are arranged, The power storage device according to claim 1 , wherein a gap between the first component and the second component is sealed by the abutting portion.

3. 3. The power storage device according to claim 2, wherein a labyrinth structure is formed by the end of the first component member located on the second component member side and the end of the second component member located on the first component member side.

4. The power storage device according to claim 3 , wherein the first component member and the second component member are made of the same type of material having the same shape.

5. The power storage device according to claim 2 , wherein the first component member and the second component member are made of metal members having different thermal expansion coefficients.

6. The power storage device according to claim 1 , wherein each of the plurality of panel components has a closed cross section extending along the first direction.

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