Electricity storage device

Abstract

Provided is a power storage device capable of suppressing heat generation of one of two power storage modules adjacent to each other when the other power storage module generates heat. A power storage device is provided with: a power storage unit including a first power storage module (10a) and a second power storage module (10b) arranged adjacent to each other in a first direction; and a bracket to which the power storage unit is fixed. The bracket includes: a main body portion extending in a first direction on the outside of the first power storage module (10a) and the second power storage module (10b); and a protruding section (62) that protrudes from the main body section in an intersecting direction that intersects the first direction and enters a gap between the first power storage module (10a) and the second power storage module (10b), the protruding section (62) being provided with a hole section (62 h).

Description

Technical Field

[0001] This disclosure relates to energy storage devices. Background Technology

[0002] As a conventional energy storage device, Japanese Patent Application Publication No. 2018-067485 (Patent Document 1) discloses a structure in which multiple adjacent battery modules (energy storage modules) are connected by a connecting fixing bracket. Each battery module includes multiple stacked individual batteries (energy storage units) and a fixing plate disposed at both ends in the stacking direction of the individual batteries and clamping the multiple individual batteries in the stacking direction. The connecting fixing bracket has a bracket body, which has a flat plate shape that integrally spans the fixing plate of each battery module, and the bracket body contacts the fixing plate.

[0003] [Existing Technical Documents]

[0004] [Patent Literature]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2018-067485 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the structure disclosed in Patent Document 1, when one of the adjacent energy storage modules heats up, the heat is transferred to the other energy storage module through the fixing plate on the side of the first energy storage module, the connecting fixing bracket, and the fixing plate on the side of the other adjacent energy storage module. At this time, the main body of the connecting fixing bracket has a flat plate shape, and a considerable amount of heat is transferred to the other energy storage module, so the other energy storage module may also heat up.

[0008] This disclosure was made in view of the aforementioned problems, and the object of this disclosure is to provide an energy storage device that can suppress the heating of the other energy storage module when one of two adjacent energy storage modules heats up.

[0009] Methods for solving problems

[0010] The energy storage device based on this disclosure includes: an energy storage unit comprising a first energy storage module and a second energy storage module arranged adjacent to each other in a first direction; and a bracket for fixing the energy storage unit, the bracket comprising: a main body extending along the first direction outside the first energy storage module and the second energy storage module; and a protrusion protruding from the main body in a cross direction intersecting the first direction and entering the gap between the first energy storage module and the second energy storage module, the protrusion having a hole.

[0011] According to the above structure, the protrusion disposed in the gap between the first and second energy storage modules forms the shortest heat transfer path along the first direction in which the first and second energy storage modules are arranged. By providing a hole in such a heat transfer path, the cross-sectional area of ​​the heat transfer path can be reduced. Therefore, when one of the first and second energy storage modules heats up, the heat directed towards the other energy storage module can be reduced.

[0012] In the energy storage device based on the present disclosure, the aforementioned hole may also be provided through in a vertical direction orthogonal to the first direction and the intersecting direction. In a top view, the hole may also be elongated in the length direction of the intersecting direction. The hole may also include a first portion located on the upper side and a second portion communicating with the first portion and located below the first portion. The second portion may also be wider than the first portion in the length direction. A stepped portion may also be provided between the inner circumferential surface of the protrusion defining the first portion and the inner circumferential surface of the protrusion defining the second portion.

[0013] Based on the above structure, the mounting clamp can be easily inserted into the elongated hole. By providing a stepped portion, such as an L-shaped mounting clamp, the bracket can be easily moved during installation by hooking the hook portion of the clamp provided at the lower end onto the stepped portion.

[0014] Invention Effects

[0015] According to this disclosure, an energy storage device can be provided that can suppress the heating of the other energy storage module when one of two adjacent energy storage modules heats up. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a vehicle equipped with an energy storage device.

[0017] Figure 2 This is an exploded perspective view of the energy storage device according to the embodiment.

[0018] Figure 3 This is a top view of the interior of the energy storage device according to the embodiment.

[0019] Figure 4 This is a perspective view that schematically shows the bracket and cooler in the energy storage device of the embodiment.

[0020] Figure 5 It is along Figure 3 The cross-sectional view of the VV line shown.

[0021] Figure 6 It is along Figure 3The sectional view of line VI-VI shown. Detailed Implementation

[0022] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Furthermore, in the embodiments shown below, the same or common parts are labeled with the same reference numerals in the drawings, and their descriptions will not be repeated.

[0023] Figure 1 This is a schematic diagram of a vehicle equipped with an energy storage device according to an implementation method. (See reference...) Figure 1 The vehicle 150 involved in the implementation method will be described.

[0024] Vehicle 150 is, for example, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a battery electric vehicle.

[0025] Vehicle 150 includes an energy storage device 100 and an equipment unit 120. The energy storage device 100 is, for example, disposed below the floor of vehicle 150. Furthermore, the configuration of the energy storage device 100 is not limited to the above; the upper component 91 described later (see...) Figure 2 It can also be used as flooring.

[0026] The device unit 120 is, for example, disposed at the end of the energy storage device 100 in the X direction. Specifically, the device unit 120 is disposed on the rear of the upper member 91 in the longitudinal direction of the vehicle 150. The device unit 120 includes, for example, an electronic control unit and a junction box.

[0027] In this disclosure, the X, Y, and Z directions are orthogonal to each other. For example, the X direction is the front-rear direction of vehicle 150, and the Y direction is the width direction of vehicle 150. The X1 direction is from the rear side of vehicle 150 towards the front side of vehicle 150. The X2 direction is from the front side of vehicle 150 towards the rear side of vehicle 150. The Y1 direction is from the right side of vehicle 150 towards the left side of vehicle 150. The Y2 direction is from the left side of vehicle 150 towards the right side of vehicle 150. The Z direction is vertical. The Z1 direction is from the lower side of vehicle 150 towards the upper side of vehicle 150. The Z2 direction is from the upper side of vehicle 150 towards the lower side of vehicle 150. In this disclosure, the Z1 direction is also referred to as "upper" or "upper side," and the Z2 direction is also referred to as "lower" or "lower side."

[0028] Figure 2 This is an exploded perspective view of the energy storage device according to the embodiment. Figure 3 This is a top view of the interior of the energy storage device according to the embodiment. (Refer to...) Figure 2 and Figure 3 The energy storage device 100 of the embodiment will be described.

[0029] like Figure 2 and Figure 3 As shown, the energy storage device 100 includes a housing 90, a plurality of reinforcing members 81 (first reinforcing members), a plurality of reinforcing members 82 (second reinforcing members), an energy storage unit 110, a plurality of brackets 60 (first brackets), and a plurality of brackets 70 (second brackets).

[0030] The housing 90 houses multiple reinforcing members 81, multiple reinforcing members 82, an energy storage unit 110, multiple cooling units R, multiple brackets 60, and multiple brackets 70.

[0031] The housing 90 includes an upper member 91 and a lower housing 92. The lower housing 92 has a generally box-shaped shape with an opening facing upwards.

[0032] The lower housing 92 includes a bottom wall 921 and a peripheral wall 922. The peripheral wall 922 rises from the periphery of the bottom wall 921. The peripheral wall 922 includes side walls 931 to 934. The side walls 931 and 932 are arranged spaced apart in the Y direction. Furthermore, the Y direction is orthogonal to the X direction and parallel to the width direction of the vehicle. In addition, the Y direction corresponds to the first direction. The side walls 933 and 934 are arranged spaced apart in the X direction.

[0033] Reinforcing members 81 and 82 are disposed on the lower housing 92. Reinforcing members 81 and 82 are respectively formed to protrude upwards from the bottom wall 921 of the lower housing 92. Reinforcing members 81 and 82 are respectively fixed (e.g., fastened or welded) to the bottom wall 921. Reinforcing members 81 and 82 are, for example, plate-like metal components.

[0034] The plurality of reinforcing members 81 includes four reinforcing members 81. The four reinforcing members 81 are arranged at intervals in the X direction. The four reinforcing members 81 extend along the Y direction respectively. The number of reinforcing members 81 is not limited to four. One or more reinforcing members 81 may be provided in the lower housing 92.

[0035] The plurality of reinforcing members 82 includes six reinforcing members 82. More specifically, two reinforcing members 82 are arranged at intervals in the Y direction between the reinforcing members 81 arranged along the X direction. The six reinforcing members 82 extend in the X direction respectively. The number of reinforcing members 82 is not limited to six. One or more reinforcing members 82 may be provided in the lower housing 92.

[0036] The housing space within the housing 90 is divided into multiple (nine in this embodiment) spaces by means of multiple reinforcing members 81 and 82. Each of the nine spaces is equipped with a power storage module 10.

[0037] The energy storage unit 110 includes a plurality of energy storage modules 10. The plurality of energy storage modules 10 includes nine energy storage modules 10. The nine energy storage modules 10 are connected in series via a busbar (not shown). Furthermore, the number of energy storage modules 10 is not limited to nine. As described later, the energy storage unit 110 may include two energy storage modules (a first energy storage module and a second energy storage module) that are adjacent to each other in the Y direction.

[0038] Nine energy storage modules 10 are arranged in a 3×3 matrix in the XY plane. Specifically, there are three module columns M consisting of three energy storage modules 10 arranged in the Y direction in the X direction.

[0039] Module column M includes a first energy storage module 10a, a second energy storage module 10b, and a third energy storage module 10c. The first energy storage module 10a is the centrally located energy storage module 10 among the three energy storage modules 10 in module column M. The second energy storage module 10b is the energy storage module 10 located furthest from the Y2 side among the three energy storage modules 10 in module column M. The third energy storage module 10c is the energy storage module 10 located furthest from the Y1 side among the three energy storage modules 10 in module column M. The second energy storage module 10b and the first energy storage module 10a are adjacent in the horizontal direction, and the first energy storage module 10a and the third energy storage module 10c are also adjacent in the horizontal direction.

[0040] Each energy storage module 10 includes side panels 111 and 112 arranged at intervals in the X direction. Side panel 111 is positioned on the X1 side closer to the side than side panel 112.

[0041] Each energy storage module 10 includes a lower module 1 and an upper module 2. The upper module 2 is positioned above the lower module 1 (on the Z1 side). The lower module 1 and the upper module 2 are stacked in the Z direction with the cooler 30 in between. Alternatively, each energy storage module 10 may also include only either the lower module 1 or the upper module 2.

[0042] Multiple cooling units R are configured to allow refrigerant flow. The multiple cooling units R cool the energy storage unit 110. The cooling units R are located in each module row M. In this embodiment, the multiple cooling units R include three cooling units R.

[0043] Each cooling unit R is positioned between the lower module 1 and the upper module 2, and each cooler 30 is positioned between the lower module 1 and the upper module 2.

[0044] Brackets 60 and 70 are respectively fixed to the lower housing 92 via reinforcing members 81. Brackets 60 and 70 respectively fix the energy storage unit 110 to the lower housing 92. More specifically, brackets 60 and 70 respectively fix a module array M consisting of three energy storage modules 10 (first energy storage module 10a, second energy storage module 10b, and third energy storage module 10c) to the lower housing 92. Brackets 60 and 70 may also be formed of, for example, aluminum.

[0045] Brackets 60 and 70 are provided for each module column M. Specifically, multiple brackets 60 include three brackets 60, and multiple brackets 70 include three brackets 70. Furthermore, the number of each of the brackets 60 and 70 is not limited to three. The number of brackets 60 and 70 can vary depending on the number of module rows M.

[0046] Brackets 60 and 70 connect the three energy storage modules 10 (first energy storage module 10a, second energy storage module 10b, and third energy storage module 10c) of module row M, respectively. Brackets 60 and 70 extend in the Y direction across the first energy storage module 10a, second energy storage module 10b, and third energy storage module 10c, respectively. More specifically, bracket 60 is arranged across the side 111 of the three energy storage modules 10 (first energy storage module 10a, second energy storage module 10b, and third energy storage module 10c) arranged in the Y direction. Bracket 70 is arranged across the side 112 of the three energy storage modules 10 (first energy storage module 10a, second energy storage module 10b, and third energy storage module 10c) arranged in the Y direction.

[0047] Brackets 60 and 70 are respectively for the three energy storage modules 10 in module column M, connecting the lower module 1 and the upper module 2.

[0048] The energy storage device 100 also includes bolts 56 and 57. Bolt 56 secures the bracket 60 to the reinforcing member 81. Bolt 57 secures the bracket 70 and the reinforcing member 81.

[0049] The energy storage device 100 also includes a first upper side bolt 51, a second upper side bolt 52, and a first lower side bolt 53 (see reference). Figure 5The energy storage module 10 includes a connecting portion 11 and a connecting portion 12 arranged at intervals in the X direction. The connecting portion 11 is positioned on the X1 side closer to the connecting portion 12. The first upper side bolt 51 and the first lower side bolt 53 securely connect the connecting portion 11 to the bracket 60. The second upper side bolt 52 and the second lower side bolt 54 securely connect the connecting portion 12 to the bracket 70. The connecting portions 11 and 12 may also be end plates, for example. In this case, each energy storage module 10 includes a plurality of energy storage units arranged in the X direction and end plates arranged at both ends in the X direction and clamping the plurality of energy storage units. The energy storage units may also be secondary batteries such as nickel-metal hydride batteries or lithium-ion batteries. The energy storage units may use liquid electrolytes or solid electrolytes. In addition, the energy storage units may also be capacitors capable of charging and discharging.

[0050] Figure 4 This is a perspective view that schematically shows the bracket and cooler in the energy storage device of the embodiment.

[0051] like Figure 4 As shown, the cooling unit R includes three coolers 30. More specifically, each cooling unit R includes a first cooler 30a, a second cooler 30b, and a third cooler 30c. The first cooler 30a cools the first energy storage module 10a. The second cooler 30b cools the second energy storage module 10b. The third cooler 30c cools the third energy storage module 10c. Thus, in this embodiment, a case with nine coolers 30 is illustrated, but the number of coolers 30 is not limited to nine. The number of coolers 30 can vary depending on the number of energy storage modules 10.

[0052] Cooler 30 is disposed between lower module 1 and upper module 2. Cooler 30 includes a lower surface 34 (see reference) arranged at intervals in the Z direction. Figure 5 ) and upper surface 35 (refer to) Figure 5 The upper surface 35 is positioned above the lower surface 34 (on the Z1 side). A heat-conducting material 390 is provided on both the lower surface 34 and the upper surface 35 (see reference). Figure 5 The heat-conducting material 390 has, for example, a higher thermal conductivity than air (air gap). By providing the heat-conducting material 390 on the lower surface 34 and the upper surface 35, the thermal conductivity between the lower module 1 and the upper module 2 and the cooler 30 is improved.

[0053] The cooler 30 has, for example, a plate-like shape. The cooler 30 includes a main body 31, an insertion part 32, and an insertion part 33. The insertion part 32 protrudes from the main body 31 toward the X1 side. The insertion part 33 protrudes from the main body 31 toward the X2 side.

[0054] The bracket 60 has a main body 61, a plurality of first protrusions 62, and a plurality of second protrusions 63. The main body 61 extends along the Y direction outside the first energy storage module 10a, the second energy storage module 10b, and the third energy storage module 10c. The main body 61 has side surfaces 61a and 61b arranged at intervals in the X direction. Side surface 61b is located on the X2 side relative to side surface 61a.

[0055] Multiple unit insertion ports 65 are provided on side 61b. Cooling units R are inserted into the multiple unit insertion ports 65. Specifically, the multiple unit insertion ports 65 have insertion ports 65a, 65b, and 65c. The insertion part 32 of the first cooler 30a is inserted into insertion port 65a. The insertion part 32 of the second cooler 30b is inserted into insertion port 65b. The insertion part 32 of the third cooler 30c is inserted into insertion port 65c.

[0056] Multiple first protrusions 62 protrude from the main body 61 in a cross direction intersecting the Y direction. Specifically, the multiple first protrusions 62 protrude from the main body 61 in the X2 direction. The multiple first protrusions 62 enter the gaps between adjacent energy storage modules in each module row M. The multiple first protrusions 62 include protrusions entering the gap between the first energy storage module 10a and the second energy storage module 10b, and protrusions entering the gap between the first energy storage module 10a and the third energy storage module 10c. Each of the multiple first protrusions 62 is provided with a hole 62h, which will be described later. In top view, the hole 62h has an elongated shape protruding in a cross direction intersecting the Y direction (specifically, the X direction).

[0057] Multiple second protrusions 63 protrude from the main body 61 toward a side opposite to the side where multiple first protrusions 62 protrude from the main body 61. The multiple second protrusions 63 are positioned corresponding to the two ends of each energy storage module 10 in the Y direction. Through holes are provided in the multiple second protrusions 63, and the bracket 60 is fixed to the reinforcing member 81 by inserting bolts 56 through these through holes.

[0058] The bracket 70 has a main body 71, a plurality of first protrusions 72, and a plurality of second protrusions 73. The main body 71 extends along the Y direction outside the first energy storage module 10a, the second energy storage module 10b, and the third energy storage module 10c. The main body 71 has side surfaces 71a and 71b arranged at intervals in the X direction. Side surface 71b is located on the X2 side relative to side surface 71a.

[0059] Multiple unit insertion ports 75 are provided on the side 71a. Cooling units R are inserted into the multiple unit insertion ports 75. Specifically, the multiple unit insertion ports 75 have insertion ports 75a, 75b, and 75c. The insertion part 33 of the first cooler 30a is inserted into insertion port 75a. The insertion part 33 of the second cooler 30b is inserted into insertion port 75b. The insertion port 75c is for the insertion part 33 of the third cooler 30c to be inserted. In this way, by inserting the insertion parts 32 and 33 into the multiple unit insertion ports 65 and 75, the multiple coolers 30 are held in the brackets 60 and 70.

[0060] Multiple first protrusions 72 protrude from the main body 71 in a cross direction intersecting the Y direction. Specifically, the multiple first protrusions 72 protrude from the main body 71 in the X1 direction. The multiple first protrusions 72 enter the gaps between adjacent energy storage modules in each module row M. The multiple first protrusions 72 include protrusions entering the gap between the first energy storage module 10a and the second energy storage module 10b, and protrusions entering the gap between the first energy storage module 10a and the third energy storage module 10c. Each of the multiple first protrusions 72 is provided with a hole 72h, which will be described later. In top view, the hole 72h has an elongated shape protruding in a cross direction intersecting the Y direction (specifically, the X direction).

[0061] Multiple second protrusions 73 protrude from the main body 71 toward a side opposite to the side where multiple first protrusions 72 protrude from the main body 71. The multiple second protrusions 73 are positioned corresponding to the two ends of each energy storage module 10 in the Y direction. Through holes are provided in the multiple second protrusions 73, and the bracket 70 is fixed to the reinforcing member 81 by inserting bolts 57 through these through holes.

[0062] Figure 5 It is along Figure 3 The cross-sectional view of the VV line shown. Figure 6 It is along Figure 3 The sectional view along line VI-VI is shown. (Refer to...) Figure 5 and Figure 6 The details of bracket 60 will be described below. Furthermore, bracket 70 has a shape that is approximately rotationally symmetrical to bracket 60, therefore a detailed description of bracket 70 is omitted. Bracket 70 has a shape that is approximately rotationally symmetrical to bracket 60 if it is rotated 180° in the vertical direction (Z direction).

[0063] like Figure 5As shown, the connecting portion 11 of the energy storage module 10 includes a lower connecting portion 11a and an upper connecting portion 11b. The lower connecting portion 11a is disposed in the lower module 1. The upper connecting portion 11b is disposed in the upper module 2. A hole 13a extending in the Z direction is formed in the lower connecting portion 11a. A hole 13b extending in the Z direction is formed in the upper connecting portion 11b.

[0064] Specifically, the lower side connecting portion 11a and the upper side connecting portion 11b each have a central portion protruding in the Y direction in the vertical direction, and holes 13a and 13b are provided in the aforementioned protruding portions of the lower side connecting portion 11a and the upper side connecting portion 11b, respectively.

[0065] Furthermore, the aforementioned first protrusion 62 has a first overlapping portion 621 that overlaps vertically with one of the adjacent energy storage modules 10 in the Y direction, and a second overlapping portion 622 that overlaps vertically with the other adjacent energy storage module 10 in the Y direction. In this embodiment, the first overlapping portion 621 overlaps with the first energy storage module 10a, and the second overlapping portion 622 overlaps with the second energy storage module 10b.

[0066] A fixing through hole 621h is provided in the first overlapping portion 621, and a fixing through hole 622h is provided in the second overlapping portion 622. The fixing through hole 621h communicates with the holes 13a and 13b of the lower side connecting portion 11a and the upper side connecting portion 11b located on the side of the second energy storage module 10a in the first energy storage module 10a.

[0067] The through hole 622h for fixing is connected to the holes 13a and 13b of the lower side connecting portion 11a and the upper side connecting portion 11b located on the side of the first energy storage module 10a in the second energy storage module 10b.

[0068] The first upper side bolt 51 has its first protrusion 62 in the Y direction inserted at both ends into the aforementioned hole 13b and the fixing through hole 621h, or the aforementioned hole 13b and the fixing through hole 622h. The first lower side bolt 53 has its first protrusion 62 in the Y direction inserted at both ends into the aforementioned hole 13a and the fixing through hole 621h, or the aforementioned hole 13b and the fixing through hole 622h.

[0069] Thus, the two ends of the first protrusion 62 in the Y direction pass through the upper side connecting portion 11b and the lower side connecting portion 11a and are inserted into the first upper side bolt 51 and the first lower side bolt 53, thereby fixing the energy storage module 10 to the bracket 60.

[0070] A hole 62h is provided in the first protrusion 62. The hole 62h is through in the vertical direction. The hole 62h overlaps with the reinforcing member 82 in the vertical direction. The hole 62h is provided in the Y direction between the first overlapping part 621 and the second overlapping part 622.

[0071] Here, when one of the first energy storage module 10a and the second energy storage module 10b heats up, the first protrusion 62 disposed in the gap between the first energy storage module 10a and the second energy storage module 10b is made to have the shortest heat transfer path along the Y direction. By providing the hole 62h in such a heat transfer path, the cross-sectional area of ​​the heat transfer path can be reduced. Therefore, when one of the first energy storage module 10a and the second energy storage module 10b heats up, the heat transfer of the other energy storage module 10a can be reduced.

[0072] like Figure 6 As shown, the hole 62h includes a first portion 62h1 located on the upper side and a second portion 62h2 communicating with the first portion 62h1 and located lower than the first portion 62h1. As described above, in plan view, the hole 62h is elongated in the X direction. The second portion 62h2 is wider than the first portion 62h1 in the length direction. A stepped portion 67 is provided between the inner circumferential surface of the first protrusion 62 defining the first portion 62h1 and the inner circumferential surface of the first protrusion 62 defining the second portion 62h2.

[0073] As described above, the elongated shape of the hole 62h facilitates the insertion of the mounting clamp 200 into it. Furthermore, by providing the aforementioned stepped portion 67, such as an L-shaped mounting clamp 200, the hook portion of the clamp located at the lower end can be easily hooked onto the stepped portion. Therefore, the bracket 60 can be easily moved during installation and other processes.

[0074] Furthermore, bracket 70 is constructed in a manner substantially similar to bracket 60, and bracket 70 performs the same function as bracket 60 as described above.

[0075] The embodiments disclosed herein are illustrative and not restrictive in all respects. The scope of the invention is defined by the claims, which include all modifications within the meaning and scope equivalent to the claims.

[0076] Explanation of reference numerals in the attached figures

[0077] 1. Lower module, 2. Upper module, 10. Energy storage module, 10a. First energy storage module, 10b. Second energy storage module, 10c. Third energy storage module, 11, 12. Connecting parts, 11a. Lower side connecting part, 11b. Upper side connecting part, 13a, 13b. Holes, 30. Cooler, 30a. First cooler, 30b. Second cooler, 30c. Third cooler, 31. Main body, 32, 33. Insertion part, 34. Lower surface, 35. Upper surface, 51. First upper side bolt, 52. Second upper side bolt, 53. First lower side bolt, 54. Second lower side bolt, 56, 57. Bolt, 60. Bracket, 61. Main body, 61a, 61b. Side, 62. First protrusion, 62h. Hole, 62h1. First part, 62h2. Second part, 63. Second protrusion, 6 5. Unit insertion port, 65a, 65b, 65c insertion ports, 67. Stepped portion, 70. Bracket, 71. Main body, 71a, 71b. Sides, 72. First protrusion, 72h. Hole, 73. Second protrusion, 75. Unit insertion port, 75a, 75b, 75c insertion ports, 81, 82. Reinforcing member, 90. Housing, 91. Upper member, 92. Lower housing, 100. Energy storage device, 110. Energy storage unit, 111, 112. Sides, 120. Equipment unit, 150. Vehicle, 200. Mounting fixture, 390. Heat-conducting material, 621. First overlapping portion, 621h. Through hole for fixing, 622. Second overlapping portion, 622h. Through hole for fixing, 921. Bottom wall, 922. Peripheral wall, 931, 932, 933, 934. Side wall, M. Module row, R. Cooling unit.

Claims

1. An electric power storage device, comprising: The power storage unit includes a first power storage module and a second power storage module arranged adjacent to each other in a first direction. a housing for housing the electric power storage units, the housing including: a main body portion extending along the first direction outside the first electric power storage module and the second electric power storage module; and a protruding portion protruding from the main body portion in a direction intersecting the first direction into a gap between the first electric power storage module and the second electric power storage module, a hole portion being provided in the protruding portion.

2. The electric power storage device according to claim 1, wherein the hole portion is provided through in an up-down direction orthogonal to the first direction and the intersecting direction, in a plan view, the hole portion has an elongated shape with the intersecting direction as a length direction, the hole portion includes a first portion on an upper side and a second portion communicating with the first portion and located lower than the first portion, the second portion is wider than the first portion in the length direction, a step portion is provided between an inner peripheral surface of the protruding portion defining the first portion and an inner peripheral surface of the protruding portion defining the second portion. ​ ​

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