Power storage device

Abstract

Provided is an electricity storage device that, when one of two adjacent electricity storage modules generates heat, can suppress heat generation in the other electricity storage module. [Solution] The energy storage device comprises an energy storage unit including a first energy storage module 10a and a second energy storage module 10b arranged adjacent to each other in a first direction, and a bracket to which the energy storage unit is fixed, and includes a main body extending along the first direction outside the first energy storage module 10a and the second energy storage module 10b, and a protrusion 62 protruding from the main body in a direction intersecting the first direction and fitting into the gap between the first energy storage module 10a and the second energy storage module 10b, and the protrusion 62 has a hole 62h provided in it.

Description

[Technical Field]

[0001] The present disclosure relates to an electricity storage device. [Background technology]

[0002] As a conventional energy storage device, Japanese Patent Application Laid-Open No. 2018-067485 (Patent Document 1) discloses a structure in which multiple adjacent battery modules (energy storage modules) are connected by a connecting and fixing bracket. Each battery module includes multiple stacked unit cells (energy storage cells) and fixing plates arranged on both ends of the unit cells in the stacking direction and sandwiching the multiple unit cells in the stacking direction. The connecting and fixing bracket has a flat bracket body that entirely spans the fixing plates of each battery module, and the bracket body is in contact with the fixing plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2018-067485 Summary of the Invention [Problem to be solved by the invention]

[0004] In the structure disclosed in Patent Document 1, when one of adjacent energy storage modules generates heat, the heat is transferred to the other energy storage module through the fixing plate on that module's side, the connecting and fixing bracket, and the fixing plate on the other of the adjacent energy storage modules. In this case, because the main body of the connecting and fixing bracket has a flat plate shape, a considerable amount of heat is transferred to the other energy storage module, which raises concerns that the other energy storage module will also generate heat.

[0005] The present disclosure has been made in consideration of the above-mentioned problems, and an object of the present disclosure is to provide an energy storage device that can suppress heat generation in one of two adjacent energy storage modules when the other energy storage module generates heat. [Means for solving the problem]

[0006] The present disclosure provides an energy storage device comprising: an energy storage unit including a first energy storage module and a second energy storage module arranged adjacent to each other in a first direction; and a bracket to which the energy storage unit is fixed. The device further comprises: a main body extending along the first direction on the outside of the first energy storage module and the second energy storage module; and a protrusion protruding from the main body in a direction intersecting the first direction and adapted to fit into a gap between the first energy storage module and the second energy storage module. The protrusion has a hole.

[0007] According to the above configuration, the shortest heat transfer path is the path along the first direction in which the first and second power storage modules are aligned, through the protrusion disposed in the gap between the first and second power storage modules. By providing holes in such a heat transfer path, the cross-sectional area of ​​the heat transfer path can be reduced. As a result, when one of the first and second power storage modules generates heat, the amount of heat directed toward the other of the first and second power storage modules can be reduced.

[0008] In the power storage device according to the present disclosure, the hole may be provided penetrating in a vertical direction perpendicular to the first direction and the intersecting direction. When viewed from above, the hole may have an elongated shape with the intersecting direction as its longitudinal direction. The hole may include a first portion located on an upper side and a second portion communicating with the first portion and located below the first portion. The second portion may be wider in the longitudinal direction than the first portion. A step may be provided between an inner circumferential surface of the protrusion defining the first portion and an inner circumferential surface of the protrusion defining the second portion.

[0009] According to the above configuration, it is easy to insert the mounting jig into the elongated hole. By providing the step, for example, in the case of an L-shaped mounting jig, by hooking the hook portion of the jig provided at the bottom end onto the step portion, the bracket can be easily moved during mounting. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to provide an energy storage device that can suppress heat generation in one of two adjacent energy storage modules when the other energy storage module generates heat. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a schematic diagram of a vehicle equipped with an electricity storage device according to an embodiment. [Figure 2] FIG. 2 is an exploded perspective view of the electricity storage device according to the embodiment. [Figure 3] FIG. 2 is a top view of the inside of the power storage device according to the embodiment. [Figure 4] FIG. 2 is a perspective view schematically showing a bracket and a cooler in the electricity storage device according to the embodiment. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV shown in FIG. [Figure 6] FIG. 4 is a cross-sectional view taken along line VI-VI shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the embodiments described below, the same or common parts are denoted by the same reference numerals in the drawings, and the description thereof will not be repeated.

[0013] 1 is a schematic diagram of a vehicle equipped with a power storage device according to an embodiment. Referring to FIG. 1, a vehicle 150 according to an embodiment will be described.

[0014] Vehicle 150 is, for example, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a battery electric vehicle.

[0015] The vehicle 150 includes the power storage device 100 and the equipment unit 120. The power storage device 100 is disposed, for example, below a floor panel of the vehicle 150. Note that the arrangement of the power storage device 100 is not limited to the above, and an upper member 91 (see FIG. 2 ), which will be described later, may function as the floor panel.

[0016] The equipment unit 120 is disposed, for example, at an end of the electricity storage device 100 in the X direction. Specifically, the equipment unit 120 is disposed on the rear of the upper member 91 in the front-rear direction of the vehicle 150. The equipment unit 120 includes, for example, an electronic control unit and a junction box.

[0017] In the present disclosure, the X direction, Y direction, and Z direction are perpendicular to one another. For example, the X direction is the front-to-rear direction of the vehicle 150, and the Y direction is the width direction of the vehicle 150. The X1 direction is the direction from the rear side of the vehicle 150 toward the front side of the vehicle 150. The X2 direction is the direction from the front side of the vehicle 150 toward the rear side of the vehicle 150. The Y1 direction is the direction from the right side of the vehicle 150 toward the left side of the vehicle 150. The Y2 direction is the direction from the left side of the vehicle 150 toward the right side of the vehicle 150. The Z direction is the up-down (vertical) direction. The Z1 direction is the direction from the bottom side of the vehicle 150 toward the top side of the vehicle 150. The Z2 direction is the direction from the top side of the vehicle 150 toward the bottom side of the vehicle 150. In the present disclosure, the Z1 direction is also referred to as the top or upper side, and the Z2 direction is also referred to as the bottom or lower side.

[0018] Fig. 2 is an exploded perspective view of the power storage device according to the embodiment. Fig. 3 is a top view of the inside of the power storage device according to the embodiment. The power storage device 100 according to the embodiment will be described with reference to Figs. 2 and 3.

[0019] As shown in Figures 2 and 3, the energy storage device 100 includes a storage case 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).

[0020] The housing case 90 houses a plurality of reinforcing members 81, a plurality of reinforcing members 82, an electricity storage unit 110, a plurality of cooling units R, a plurality of brackets 60, and a plurality of brackets 70.

[0021] The housing case 90 includes an upper member 91 and a lower case 92. The lower case 92 has a generally box-like shape that opens upward.

[0022] The lower case 92 includes a bottom wall 921 and a peripheral wall 922. The peripheral wall 922 stands upright from the peripheral edge of the bottom wall 921. The peripheral wall 922 includes side walls 931 to 934. The side walls 931 and 932 are arranged at an interval in the Y direction. The Y direction is perpendicular to the X direction and parallel to the width direction of the vehicle. The Y direction corresponds to the first direction. The side walls 933 and 934 are arranged at an interval in the X direction.

[0023] Reinforcing members 81 and 82 are provided on lower case 92. Each of reinforcing members 81 and 82 is formed so as to protrude upward from a bottom wall 921 of lower case 92. Each of reinforcing members 81 and 82 is fixed (for example, fastened or welded) to bottom wall 921. Each of reinforcing members 81 and 82 is, for example, a plate-shaped member made of metal.

[0024] The plurality of reinforcing members 81 includes four reinforcing members 81. The four reinforcing members 81 are arranged at intervals in the X direction. Each of the four reinforcing members 81 extends in the Y direction. The number of reinforcing members 81 is not limited to four. It is sufficient that one or more reinforcing members 81 are provided in the lower case 92.

[0025] The plurality of reinforcing members 82 includes six reinforcing members 82. More specifically, two reinforcing members 82 are arranged in the Y direction between reinforcing members 81 aligned in the X direction, with a gap therebetween. Each of the six reinforcing members 82 extends in the X direction. The number of reinforcing members 82 is not limited to six. It is sufficient that one or more reinforcing members 82 are provided in the lower case 92.

[0026] The storage space within the storage case 90 is divided into a plurality of spaces (nine in this embodiment) by the plurality of reinforcing members 81, 82. One power storage module 10 is disposed in each of the nine spaces.

[0027] 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 by bus bars (not shown). The number of energy storage modules 10 is not limited to nine. As will be described later, the energy storage unit 110 may include two energy storage modules (a first energy storage module and a second energy storage module) adjacent to each other in the Y direction.

[0028] The nine energy storage modules 10 are arranged in a 3 × 3 matrix on the XY plane. Specifically, three module rows M, each consisting of three energy storage modules 10 aligned in the Y direction, are arranged in the X direction.

[0029] The module row M includes a first power storage module 10a, a second power storage module 10b, and a third power storage module 10c. The first power storage module 10a is the central power storage module 10 of the three power storage modules 10 in the module row M. The second power storage module 10b is the power storage module 10 of the three power storage modules 10 in the module row M that is positioned closest to the Y2 side. The third power storage module 10c is the power storage module 10 of the three power storage modules 10 in the module row M that is positioned closest to the Y1 side. The second power storage module 10b and the first power storage module 10a are adjacent to each other in the horizontal direction, and the first power storage module 10a and the third power storage module 10c are adjacent to each other in the horizontal direction.

[0030] Each power storage module 10 includes a side surface 111 and a side surface 112 that are spaced apart in the X direction. The side surface 111 is located closer to the X1 side than the side surface 112.

[0031] Each energy storage module 10 includes a lower module 1 and an upper module 2. The upper module 2 is disposed higher (on the Z1 side) than the lower module 1. The lower module 1 and the upper module 2 are stacked in the Z direction with the cooler 30 sandwiched between them. Note that each energy storage module 10 may include only either the lower module 1 or the upper module 2.

[0032] The plurality of cooling units R are provided so that a refrigerant can flow. The plurality of cooling units R cool the power storage units 110. A cooling unit R is provided for each module row M. In the present embodiment, the plurality of cooling units R includes three cooling units R.

[0033] Each cooling unit R is disposed between a lower module 1 and an upper module 2, and each cooler 30 is disposed between a lower module 1 and an upper module 2.

[0034] Each of the brackets 60 and 70 is fixed to the lower case 92 via a reinforcing member 81. Each of the brackets 60 and 70 fixes the power storage unit 110 to the lower case 92. More specifically, each of the brackets 60 and 70 fixes a module row M made up of three power storage modules 10 (first power storage module 10a, second power storage module 10b, and third power storage module 10c) to the lower case 92. Each of the brackets 60 and 70 may be made of aluminum, for example.

[0035] Each of the brackets 60 and 70 is provided for each module row M. Specifically, the plurality of brackets 60 includes three brackets 60, and the plurality of brackets 70 includes three brackets 70. Note that the number of each of the brackets 60 and 70 is not limited to three. The number of each of the brackets 60 and 70 can vary depending on the number of module rows M.

[0036] Each of the brackets 60 and 70 couples (connects) three power storage modules 10 (the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c) in the module row M. Each of the brackets 60 and 70 extends in the Y direction so as to straddle the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c. More specifically, the bracket 60 is provided so as to straddle the side surfaces 111 of the three power storage modules 10 (the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c) aligned in the Y direction. The bracket 70 is provided so as to straddle the side surfaces 112 of the three power storage modules 10 (the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c) aligned in the Y direction.

[0037] Each of the brackets 60 and 70 connects the lower module 1 and the upper module 2 of each of the three energy storage modules 10 in the module row M.

[0038] The power storage device 100 further includes a bolt 56 and a bolt 57. The bolt 56 fastens the bracket 60 to the reinforcing member 81. The bolt 57 fastens the bracket 70 to the reinforcing member 81.

[0039] The energy storage device 100 further includes a first upper-side bolt 51, a second upper-side bolt 52, a first lower-side bolt 53 (see FIG. 5 ), and a second lower-side bolt (not shown). The energy storage module 10 includes a connecting portion 11 and a connecting portion 12 spaced apart in the X direction. The connecting portion 11 is located closer to the X1 side than the connecting portion 12. The first upper-side bolt 51 and the first lower-side bolt 53 fasten the connecting portion 11 to the bracket 60. The second upper-side bolt 52 and the second lower-side bolt 54 fasten the connecting portion 12 to the bracket 70. The connecting portions 11 and 12 may be formed, for example, by end plates. In this case, each energy storage module 10 includes a plurality of energy storage cells arranged in the X direction and end plates arranged at both ends in the X direction and sandwiching the plurality of energy storage cells therebetween. The energy storage cells may be secondary batteries such as nickel-metal hydride batteries or lithium-ion batteries. The power storage cell may use a liquid electrolyte or a solid electrolyte, and may be a chargeable and dischargeable capacitor.

[0040] FIG. 4 is a perspective view schematically showing a bracket and a cooler in the electricity storage device according to the embodiment.

[0041] As shown in FIG. 4 , 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 power storage module 10a. The second cooler 30b cools the second power storage module 10b. The third cooler 30c cools the third power storage module 10c. As described above, in the present embodiment, a case in which nine coolers 30 are provided is illustrated as an example, but the number of coolers 30 is not limited to nine. The number of coolers 30 can vary depending on the number of power storage modules 10.

[0042] The cooler 30 is disposed between the lower module 1 and the upper module 2. The cooler 30 includes a lower surface 34 (see FIG. 5) and an upper surface 35 (see FIG. 5) spaced apart in the Z direction. The upper surface 35 is disposed higher (on the Z1 side) than the lower surface 34. A thermally conductive material 390 (see FIG. 5) is provided on the lower surface 34 and the upper surface 35. The thermally conductive material 390 has higher thermal conductivity than, for example, air (an air gap). By providing the thermally conductive material 390 on the lower surface 34 and the upper surface 35, the thermal conductivity between the cooler 30 and each of the lower module 1 and the upper module 2 is improved.

[0043] The cooler 30 has, for example, a plate-like outer shape. The cooler 30 includes a main body 31, an insertion portion 32, and an insertion portion 33. The insertion portion 32 protrudes from the main body 31 toward the X1 side. The insertion portion 33 protrudes from the main body 31 toward the X2 side.

[0044] 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 in the Y direction outside the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c. The main body 61 has side surfaces 61a and 61b spaced apart in the X direction. The side surface 61b is located closer to the X2 side than the side surface 61a.

[0045] A plurality of unit insertion openings 65 are provided on the side surface 61b. The cooling units R are inserted into the plurality of unit insertion openings 65. Specifically, the plurality of unit insertion openings 65 include insertion openings 65a, 65b, and 65c. The insertion portion 32 of the first cooler 30a described above is inserted into the insertion opening 65a. The insertion portion 32 of the second cooler 30b described above is inserted into the insertion opening 65b. The insertion portion 32 of the third cooler 30c described above is inserted into the insertion opening 65c.

[0046] The multiple first protrusions 62 protrude from the main body 61 in an intersecting direction intersecting with the Y direction. Specifically, the multiple first protrusions 62 protrude from the main body 61 in the X2 direction. The multiple first protrusions 62 fit into gaps between adjacent power storage modules in each module row M. The multiple first protrusions 62 include a protrusion that fits into the gap between the first power storage module 10a and the second power storage module 10b and a protrusion that fits into the gap between the first power storage module 10a and the third power storage module 10c. Each of the multiple first protrusions 62 is provided with a hole 62h, which will be described later. When viewed from above, the hole 62h has an elongated shape that protrudes in an intersecting direction intersecting with the Y direction (specifically, the X direction).

[0047] The second protrusions 63 protrude from the main body 61 toward the side opposite to the side from which the first protrusions 62 protrude. The second protrusions 63 are disposed at positions corresponding to both ends of each energy storage module 10 in the Y direction. The second protrusions 63 are provided with through holes, and the bracket 60 is fixed to the reinforcing member 81 by inserting bolts 56 into the through holes.

[0048] 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 in the Y direction outside the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c. The main body 71 has side surfaces 71a and 71b spaced apart in the X direction. The side surface 71b is located closer to the X2 side than the side surface 71a.

[0049] A plurality of unit insertion openings 75 are provided on the side surface 71a. The cooling units R are inserted into the plurality of unit insertion openings 75. Specifically, the plurality of unit insertion openings 75 include insertion openings 75a, 75b, and 75c. The insertion portion 33 of the first cooler 30a described above is inserted into the insertion opening 75a. The insertion portion 33 of the second cooler 30b described above is inserted into the insertion opening 75b. The insertion portion 33 of the third cooler 30c described above is inserted into the insertion opening 75c. In this way, the insertion portions 32, 33 are inserted into the plurality of unit insertion openings 65, 75, whereby the plurality of coolers 30 are held by the brackets 60, 70.

[0050] The multiple first protrusions 72 protrude from the main body 71 in an intersecting direction intersecting with the Y direction. Specifically, the multiple first protrusions 72 protrude from the main body 71 in the X1 direction. The multiple first protrusions 72 fit into gaps between adjacent power storage modules in each module row M. The multiple first protrusions 72 include a protrusion that fits into the gap between the first power storage module 10a and the second power storage module 10b and a protrusion that fits into the gap between the first power storage module 10a and the third power storage module 10c. Each of the multiple first protrusions 72 is provided with a hole 72h, which will be described later. When viewed from above, the hole 72h has an elongated shape that protrudes in an intersecting direction intersecting with the Y direction (specifically, the X direction).

[0051] The second protrusions 73 protrude from the main body 71 toward the side opposite to the side from which the first protrusions 72 protrude. The second protrusions 73 are disposed at positions corresponding to both ends of each energy storage module 10 in the Y direction. The second protrusions 73 are provided with through holes, and bolts 57 are inserted into the through holes to fix the bracket 70 to the reinforcing member 81.

[0052] Fig. 5 is a cross-sectional view taken along line VV in Fig. 3. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 3. Details of bracket 60 will be described with reference to Figs. 5 and 6. Note that bracket 70 has a shape that is approximately rotationally symmetrical to bracket 60, and therefore details of bracket 70 will be omitted. Bracket 70 has a shape that is approximately rotationally symmetrical when bracket 60 is rotated 180° with the up-and-down direction (Z direction) as the axial direction.

[0053] As shown in Fig. 5, 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 provided in the lower module 1. The upper connecting portion 11b is provided in the upper module 2. The lower connecting portion 11a has a hole 13a extending in the Z direction. The upper connecting portion 11b has a hole 13b extending in the Z direction.

[0054] Specifically, the lower connecting portion 11a and the upper connecting portion 11b each have a portion in the center in the vertical direction that protrudes in the Y direction, and holes 13a, 13b are provided in the protruding portions of each of the lower connecting portion 11a and the upper connecting portion 11b.

[0055] Furthermore, the first protrusion 62 has a first overlapping portion 621 that overlaps in the vertical direction with one of the adjacent power storage modules 10 in the Y direction, and a second overlapping portion 622 that overlaps in the vertical direction with the other of the adjacent power storage modules 10 in the Y direction. In the present embodiment, the first overlapping portion 621 overlaps with the first power storage module 10a, and the second overlapping portion 622 overlaps with the second power storage module 10b.

[0056] 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 is in communication with the holes 13a, 13b of the lower connecting portion 11a and the upper connecting portion 11b, which are located on the second power storage module 10b side of the first power storage module 10a.

[0057] The fixing through-hole 622h communicates with the holes 13a, 13b of the lower connecting portion 11a and the upper connecting portion 11b of the second power storage module 10b located on the first power storage module 10a side.

[0058] The first upper-side bolts 51 are inserted through the holes 13b and the fixing through-holes 621h, or the holes 13b and the fixing through-holes 622h, at both ends of the first protruding portion 62 in the Y direction. The first lower-side bolts 53 are inserted through the holes 13a and the fixing through-holes 621h, or the holes 13b and the fixing through-holes 622h, at both ends of the first protruding portion 62 in the Y direction.

[0059] In this way, the first upper-side bolt 51 and the first lower-side bolt 53 are inserted through the upper-side connecting portion 11b and the lower-side connecting portion 11a into both ends of the first protrusion 62 in the Y direction, thereby fixing the storage module 10 to the bracket 60.

[0060] A hole 62h is provided in the first protrusion 62. The hole 62h penetrates in the up-down direction. The hole 62h overlaps with the reinforcing member 82 in the up-down direction. The hole 62h is provided between the first overlapping portion 621 and the second overlapping portion 622 in the Y direction.

[0061] Here, when one of the first power storage module 10a and the second power storage module 10b generates heat, the shortest heat transfer path is the path along the Y direction through the first protrusion 62 disposed in the gap between the first power storage module 10a and the second power storage module 10b. By providing the holes 62h in such a heat transfer path, the cross-sectional area of ​​the heat transfer path can be reduced. As a result, when one of the first power storage module 10a and the second power storage module 10b generates heat, the heat of the other of the first power storage module 10a and the second power storage module 10b can be reduced.

[0062] 6, the hole 62h includes a first portion 62h1 located on the upper side and a second portion 62h2 that is connected to the first portion 62h1 and located below the first portion 62h1. As described above, the hole 62h has an elongated shape with its longitudinal direction aligned with the X direction when viewed from above. The second portion 62h2 is wider in the longitudinal direction than the first portion 62h1. A step 67 is provided between the inner circumferential surface of the first protrusion 62 that defines the first portion 62h1 and the inner circumferential surface of the first protrusion 62 that defines the second portion 62h2.

[0063] As described above, the elongated shape of the hole 62h makes it easy to insert the mounting jig 200 into the hole 62h. Furthermore, the provision of the stepped portion 67 makes it easy to hook a hook portion of a jig provided at the bottom end, such as an L-shaped mounting jig 200, onto the stepped portion. This allows the bracket 60 to be easily moved during mounting, etc.

[0064] The bracket 70 is configured in substantially the same manner as the bracket 60, and has the same effect as the bracket 60 described above.

[0065] The embodiments disclosed herein are illustrative in all respects and are not restrictive. 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]

[0066] REFERENCE SIGNS LIST 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 connection portion, 11a lower connection portion, 11b upper connection portion, 13a, 13b hole, 30 cooler, 30a first cooler, 30b second cooler, 30c third cooler, 31 main body portion, 32, 33 insertion portion, 34 lower surface, 35 upper surface, 51 first upper bolt, 52 second upper bolt, 53 first lower bolt, 54 second lower bolt, 56, 57 bolt, 60 bracket, 61 main body portion, 61a, 61b side surface, 62 first protrusion portion, 62h hole portion, 62h1 first portion, 62h2 second portion, 63 second protrusion portion, 65 Unit insertion port, 65a, 65b, 65c insertion port, 67 step portion, 70 bracket, 71 main body portion, 71a, 71b side surface, 72 first protrusion portion, 72h hole portion, 73 second protrusion portion, 75 unit insertion port, 75a, 75b, 75c insertion port, 81, 82 reinforcing member, 90 storage case, 91 upper member, 92 lower case, 100 power storage device, 110 power storage unit, 111, 112 side surface, 120 equipment unit, 150 vehicle, 200 mounting jig, 390 thermally conductive material, 621 first overlapping portion, 621h fixing through hole, 622 second overlapping portion, 622h fixing through hole, 921 bottom wall, 922 peripheral wall, 931, 932, 933, 934 side wall, M Module row, R cooling unit.

Claims

1. an energy storage unit including a first energy storage module and a second energy storage module arranged adjacent to each other in a first direction; a bracket to which the electricity storage unit is fixed, a main body portion extending along the first direction outside the first power storage module and the second power storage module, and a protrusion portion protruding from the main body portion in an intersecting direction intersecting the first direction and entering a gap between the first power storage module and the second power storage module, The protrusion is provided with a hole.

2. the hole is provided to penetrate in a vertical direction perpendicular to the first direction and the intersecting direction, When viewed from above, the hole has an elongated shape with the intersecting direction as its longitudinal direction, the hole includes a first portion located on an upper side and a second portion communicating with the first portion and located below the first portion, the second portion is wider in the longitudinal direction than the first portion; The power storage device according to claim 1 , wherein a step is provided between an inner circumferential surface of the protrusion that defines the first portion and an inner circumferential surface of the protrusion that defines the second portion.

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