Power storage device

Abstract

To improve assemblability of a cooling pipe.SOLUTION: The power storage device 100 includes a power storage unit 110, a cooling pipe 41 through which a refrigerant passes, a cooling unit R that cools the power storage unit 110 by the refrigerant, a housing case 90 that includes an upper case 91 and a lower case 92 disposed below the upper case 91 and houses the power storage unit 110, and a bracket 70 that is fixed to the lower case 92 and fixes the power storage unit 110. A pipe insertion port into which the cooling pipe 41 is inserted and a unit insertion port into which the cooling unit R is inserted are formed in the bracket 70. A flow path through which the refrigerant passes is formed inside the bracket 70. The flow path connects the pipe insertion port and the unit insertion port.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] For example, JP 2024-508504 A (Patent Document 1) discloses a battery pack (energy storage device) comprising a battery module, a heat sink (cooler), a pack refrigerant pipe (cooling piping) directly connected to the heat sink and through which a refrigerant passes, a pack frame (lower case), and a pack cover (upper case). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2024-508504 Summary of the Invention [Problem to be solved by the invention]

[0004] When directly connecting a pack refrigerant pipe (cooling pipe) to a heat sink (cooler), if the installation position of the cooler deviates from the predetermined position determined by the design, the length of the cooling pipe or the installation position of the cooling pipe must be adjusted in order to connect the cooling pipe and the cooler. Because this is time-consuming for the person assembling the cooling pipe, there is a demand for improving the ease of assembling the cooling pipe.

[0005] An object of the present disclosure is to improve the ease of assembly of cooling piping. [Means for solving the problem]

[0006] An energy storage device according to one aspect of the present disclosure includes an energy storage unit, a cooling pipe through which a refrigerant passes, a cooling unit that cools the energy storage unit with the refrigerant, an upper case, and a lower case disposed below the upper case, and includes an accommodating case that accommodates the energy storage unit, and a fixing member that is fixed to the lower case and fixes the energy storage unit. The fixing member is formed with a pipe insertion opening through which the cooling pipe is inserted and a unit insertion opening through which the cooling unit is inserted. A flow path through which the refrigerant passes is formed inside the fixing member. The flow path connects the pipe insertion opening and the unit insertion opening.

[0007] Preferably, the power storage unit includes a power storage module. The power storage module includes a lower module and an upper module disposed above the lower module. The cooling unit is disposed between the lower module and the upper module. Preferably, the fixing member connects the lower module and the upper module.

[0008] Preferably, the power storage unit includes a first power storage module and a second power storage module horizontally adjacent to the first power storage module. The cooling unit includes a first cooler that cools the first power storage module with a refrigerant and a second cooler that cools the second power storage module with a refrigerant. The unit insertion opening includes a first insertion opening into which the first cooler is inserted and a second insertion opening into which the second cooler is inserted. The flow path includes a first flow path connecting the piping insertion opening and the first insertion opening, and a second flow path that branches from the first flow path at a branch point located on the first flow path and connects the branch point and the second insertion opening.

[0009] Preferably, the first power storage module includes a first lower module and a first upper module disposed above the first lower module. The second power storage module includes a second lower module and a second upper module disposed above the second lower module. The first cooler is disposed between the first lower module and the first upper module. The second cooler is disposed between the second lower module and the second upper module.

[0010] Preferably, the fixing member connects the first lower module and the first upper module, and connects the second lower module and the second upper module. Preferably, the cooling unit is welded to the fixing member. [Effects of the Invention]

[0011] According to the present disclosure, the assembly of the cooling pipe can be improved. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a side view schematically illustrating a vehicle including an electricity storage device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a schematic exploded perspective view of the power storage device 100 shown in FIG. [Figure 3] 1 is a view of the inside of the power storage device 100 viewed from above the power storage device 100 with the upper case 91 removed from the power storage device 100. FIG. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 4 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] 2 is a perspective view schematically showing a cooler 30, brackets 60 and 70, and cooling pipes 41 and 42. FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 4 is a cross-sectional view taken along line XX in FIG. [Figure 11] FIG. 4 is a cross-sectional view taken along line XI-XI in FIG. [Figure 12] FIG. 4 is a cross-sectional view taken along line XII-XII in FIG. 3. [Figure 13] FIG. 2 is a plan view schematically showing a path through which a refrigerant flows. [Figure 14]FIG. 4 is a cross-sectional view taken along line XIV-XIV in FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated.

[0014] [Embodiment] A power storage device according to an embodiment of the present disclosure will be described with reference to FIGS.

[0015] 1 is a side view schematically illustrating a vehicle equipped with a power storage device according to an embodiment of the present disclosure. The power storage device 100 according to the embodiment of the present disclosure is mounted on a vehicle 150. The vehicle 150 runs using electric power stored in the power storage device 100. Examples of the vehicle 150 include a hybrid vehicle, a plug-in hybrid vehicle, a fuel cell vehicle, and an electric vehicle. The power storage device 100 is disposed below a floor panel of the vehicle 150.

[0016] The vehicle 150 includes an equipment unit 120. The equipment unit 120 includes, for example, an electronic control unit and a junction box.

[0017] The use of the power storage device 100 is not limited to vehicle use, and the power storage device 100 may be mounted on a device other than a vehicle and store electric power for driving the device.

[0018] Fig. 2 is a schematic exploded perspective view of the power storage device 100 shown in Fig. 1. Fig. 3 is a view of the interior of the power storage device 100 viewed from above the power storage device 100 with the upper case 91 removed from the power storage device 100. Note that, for ease of viewing the drawing, reinforcing members 81 and 82 are hatched in Fig. 3.

[0019] 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 (see FIG. 1 ), 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.

[0020] 2 and 3, the power storage device 100 according to this embodiment is, for example, a battery pack. The power storage device 100 includes a housing case 90, a plurality of reinforcing members 81, a plurality of reinforcing members 82, a power storage unit 110, a plurality of cooling units R, cooling pipes 41 and 42, a plurality of brackets 60, and a plurality of brackets 70. Each of the brackets 60 and 70 is an example of the "fixing member" in the present disclosure.

[0021] The storage case 90 accommodates a plurality of reinforcing members 81, a plurality of reinforcing members 82, the power storage unit 110, a plurality of cooling units R, cooling pipes 41 and 42, a plurality of brackets 60, and a plurality of brackets 70. More specifically, the storage case 90 includes an upper case 91 and a lower case 92. The lower case 92 is disposed below the upper case 91. The space formed by the upper case 91 and the lower case 92 accommodates the plurality of reinforcing members 81, a plurality of reinforcing members 82, the power storage unit 110, a plurality of cooling units R, cooling pipes 41 and 42, a plurality of brackets 60, and a plurality of brackets 70.

[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 is formed in a substantially rectangular cylindrical shape. The peripheral wall 922 includes side walls 931 to 934. The side walls 931 and 932 are spaced apart in the Y direction. The side wall 931 is located on the Y1 side of the side wall 932. The side walls 933 and 934 are spaced apart in the X direction. The side wall 933 is located on the X1 side of the side wall 934.

[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 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] In this embodiment, the multiple reinforcing members 81 include 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] In this embodiment, the multiple reinforcing members 82 include six reinforcing members 82. More specifically, two reinforcing members 82 are arranged in the Y direction between the reinforcing members 81 aligned in the X direction. 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 power storage unit 110 includes a plurality of power storage modules 10. In this embodiment, the plurality of power storage modules 10 includes nine power storage modules 10. The number of power storage modules 10 is not limited to nine. The power storage unit 110 may include one or more power storage modules 10.

[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 nine energy storage modules 10 are connected in series by bus bars. The bus bars include a first bus bar, a second bus bar, and a third bus bar. The first bus bar electrically connects the energy storage modules 10 arranged in the Y direction. The second bus bar electrically connects the lower module 1 and the upper module 2 arranged in the vertical direction. The third bus bar electrically connects the module rows M arranged in the X direction.

[0033] The cooling units R cool the energy storage units 110 with refrigerant supplied from the cooling pipes 41. A cooling unit R is provided for each module row M. That is, in this embodiment, the plurality of cooling units R includes three cooling units R. Each cooling unit R includes three coolers 30. More specifically, each cooling unit R includes a first cooler 30a (see FIG. 8), a second cooler 30b (see FIG. 8), and a third cooler 30c (see FIG. 8). The first cooler 30a is the cooler 30 that cools the first energy storage module 10a. The second cooler 30b is the cooler 30 that cools the second energy storage module 10b. The third cooler 30c is the cooler 30 that cools the third energy storage module 10c. Therefore, in this embodiment, the energy storage device 100 includes nine coolers 30. The number of coolers 30 is not limited to nine. The number of coolers 30 may vary depending on the number of power storage modules 10. Each cooler 30 is disposed between a lower module 1 and an upper module 2. That is, each cooling unit R is disposed between a lower module 1 and an upper module 2.

[0034] The cooling pipes 41 are pipes through which a refrigerant passes. The cooling pipes 41 are pipes through which a refrigerant passes to be supplied to each cooling unit R. More specifically, the cooling pipes 41 are pipes through which a refrigerant passes to be supplied to each cooler 30. The cooling pipes 41 include a main pipe 410 and three sub-pipes 411 branched from the main pipe 410. The main pipe 410 extends in the X direction between the second power storage module 10b and the first power storage module 10a. The three sub-pipes 411 extend along the respective side surfaces 112 of the three first power storage modules 10a lined up in the X direction. Each sub-pipe 411 is connected to a flow path 750 (see FIG. 11 ) formed in a bracket 70 provided on the side surface 112. The cooling pipes 41 have a cylindrical shape.

[0035] The cooling pipe 42 is a pipe through which a refrigerant passes. The cooling pipe 42 is a pipe through which a refrigerant discharged from each cooling unit R passes. More specifically, the cooling pipe 42 is a pipe through which a refrigerant discharged from each cooler 30 passes. The cooling pipe 42 includes a main pipe 420 and three sub-pipes 421 branching from the main pipe 420. The main pipe 420 extends in the X direction between the first power storage module 10a and the third power storage module 10c. The three sub-pipes 421 extend along the respective side surfaces 111 of the three first power storage modules 10a arranged in the X direction. Each sub-pipe 421 is connected to a flow path 650 (see FIG. 14 ) formed in a bracket 60 provided on the side surface 111. The cooling pipe 42 has a cylindrical shape.

[0036] 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.

[0037] Each of the brackets 60 and 70 is provided for each module row M. That is, in this embodiment, 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.

[0038] Each of the brackets 60 and 70 connects three power storage modules 10 (first power storage module 10a, second power storage module 10b, and 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, second power storage module 10b, and 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 (first power storage module 10a, second power storage module 10b, and 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 (first power storage module 10a, second power storage module 10b, and third power storage module 10c) aligned in the Y direction.

[0039] Each of the brackets 60 and 70 connects the lower module 1 and the upper module 2 of each of the three storage modules 10 in the module row M.

[0040] 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.

[0041] The power storage device 100 further includes bolts 51, 52, 53 (see FIG. 4), and 54 (see FIG. 4). The power storage module 10 includes connecting portions 11 and 12 that are spaced apart in the X direction. The connecting portion 11 is located closer to the X1 side than the connecting portion 12. The bolts 51 and 53 fasten the connecting portion 11 to the bracket 60. The bolts 52 and 54 fasten the connecting portion 12 to the bracket 70.

[0042] A method for fixing the electricity storage unit 110 (see FIG. 2) will be described with reference to FIGS.

[0043] A method for fixing each of the brackets 60 and 70 to the power storage module 10 will be described with reference to Figures 4 and 5. Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. Figure 5 is a cross-sectional view taken along line VV in Figure 3. Figure 4 shows a method for fixing each of the brackets 60 and 70 to the first power storage module 10a. Figure 5 shows a method for fixing each of the brackets 60 and 70 to the second power storage module 10b.

[0044] 4 and 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.

[0045] A hole 612a having an opening on the lower side (Z2 side) and extending upward (Z1 side) is formed in the bracket 60. In addition, a hole 612b having an opening on the upper side (Z1 side) and extending downward (Z2 side) is formed in the bracket 60.

[0046] Hole 612a is located above hole 13a (on the Z1 side). More specifically, the position of hole 612a on the XY plane is the same as the position of hole 13a on the XY plane. Hole 612b is located below hole 13b (on the Z2 side). More specifically, the position of hole 612b on the XY plane is the same as the position of hole 13b on the XY plane.

[0047] The shaft 531 of the bolt 53 is inserted into the hole 13a from below (Z2 side). The shaft 531 passes through the hole 13a and is inserted into the hole 612a from below (Z2 side). The lower module 1 is fixed to the bracket 60 by the bolt 53.

[0048] The shaft 511 of the bolt 51 is inserted into the hole 13b from above (Z1 side). The shaft 511 passes through the hole 13b and is inserted into the hole 612b from above (Z1 side). The upper module 2 is fixed to the bracket 60 by the bolt 51.

[0049] 4, the lower module 1 of the first power storage module 10a and the upper module 2 of the first power storage module 10a are fixed to the bracket 60, whereby the lower module 1 of the first power storage module 10a and the upper module 2 of the first power storage module 10a are connected via the bracket 60. Referring to FIG. 5, the lower module 1 of the second power storage module 10b and the upper module 2 of the second power storage module 10b are fixed to the bracket 60, whereby the lower module 1 of the second power storage module 10b and the upper module 2 of the second power storage module 10b are connected via the bracket 60.

[0050] That is, the bracket 60 connects the lower module 1 of the first power storage module 10a to the upper module 2 of the first power storage module 10a, and also connects the lower module 1 of the second power storage module 10b to the upper module 2 of the second power storage module 10b. The lower module 1 of the first power storage module 10a is an example of a "first lower module" in the present disclosure. The upper module 2 of the first power storage module 10a is an example of a "first upper module" in the present disclosure. The lower module 1 of the second power storage module 10b is an example of a "second lower module" in the present disclosure. The upper module 2 of the second power storage module 10b is an example of a "second upper module" in the present disclosure.

[0051] 4 and 5, the connecting portion 12 of the energy storage module 10 includes a lower connecting portion 12a and an upper connecting portion 12b. The lower connecting portion 12a is provided in the lower module 1. The upper connecting portion 12b is provided in the upper module 2. The lower connecting portion 12a has a hole 14a extending in the Z direction. The upper connecting portion 12b has a hole 14b extending in the Z direction.

[0052] A hole 712a having an opening on the lower side (Z2 side) and extending upward (Z1 side) is formed in the bracket 70. In addition, a hole 712b having an opening on the upper side (Z1 side) and extending downward (Z2 side) is formed in the bracket 70.

[0053] Hole 712a is located above (on the Z1 side of) hole 14a. More specifically, the position of hole 712a on the XY plane is the same as the position of hole 14a on the XY plane. Hole 712b is located below (on the Z2 side of) hole 14b. More specifically, the position of hole 712b on the XY plane is the same as the position of hole 14b on the XY plane.

[0054] The shaft 541 of the bolt 54 is inserted into the hole 14a from below (Z2 side). The shaft 541 passes through the hole 14a and is inserted into the hole 712a from below (Z2 side). The lower module 1 is fixed to the bracket 70 by the bolt 54.

[0055] The shaft 521 of the bolt 52 is inserted into the hole 14b from above (Z1 side). The shaft 521 passes through the hole 14b and is inserted into the hole 712b from above (Z1 side). The upper module 2 is fixed to the bracket 70 by the bolt 52.

[0056] 4, the lower module 1 of the first power storage module 10a and the upper module 2 of the first power storage module 10a are fixed to the bracket 70, whereby the lower module 1 of the first power storage module 10a and the upper module 2 of the first power storage module 10a are connected via the bracket 70. Referring to FIG. 5, the lower module 1 of the second power storage module 10b and the upper module 2 of the second power storage module 10b are fixed to the bracket 70, whereby the lower module 1 of the second power storage module 10b and the upper module 2 of the second power storage module 10b are connected via the bracket 70.

[0057] That is, the bracket 70 connects the lower module 1 of the first power storage module 10a to the upper module 2 of the first power storage module 10a, and also connects the lower module 1 of the second power storage module 10b to the upper module 2 of the second power storage module 10b.

[0058] 4 or 5 may be employed as a method for fastening each of the brackets 60 and 70 to the third power storage module 10c. In this embodiment, the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c are fixed to the brackets 60 and 70, respectively, using the fixing method shown in FIG. 4 or 5. That is, the lower module 1 of the third power storage module 10c and the upper module 2 of the third power storage module 10c are also connected to each other by the brackets 60 and 70. By fixing the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c to the bracket 60, the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c are connected to each other via the bracket 60. Furthermore, by fixing the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c to the bracket 70, the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c are connected via the bracket 70. In other words, the brackets 60 and 70 connect the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c, respectively.

[0059] A method for fixing the bracket 60 to the lower case 92 will be described with reference to Fig. 6. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 3. In Fig. 6, the cooling pipes 42 are omitted.

[0060] Bracket 60 is fastened to reinforcing member 81 and fixed to lower case 92 via reinforcing member 81. Specifically, bracket 60 has a hole 615 extending in the Z direction. Reinforcing member 81 has a hole 815 formed therein. Hole 815 is located below hole 615 (on the Z2 side). More specifically, the position of hole 615 on the XY plane is the same as the position of hole 815 on the XY plane.

[0061] The shaft 561 of the bolt 56 is inserted into the hole 615 from above (Z1 side), passes through the holes 615 and 815, and is screwed into the nut 562 provided on the lower side (Z2 side) of the reinforcing member 81. The bracket 60 is fixed to the reinforcing member 81 by the bolt 56 and the nut 562. As described above, the reinforcing member 81 is fixed to the bottom wall 921 (see FIG. 2 ) of the lower case 92. Therefore, the bracket 60 is fixed to the lower case 92 via the reinforcing member 81.

[0062] As described above, the bracket 60 connects 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) in each module row M. The bracket 60 connecting the three power storage modules 10 in the module row M is fixed to the lower case 92 via the reinforcing member 81, thereby fixing the three power storage modules 10 included in the module row M. In other words, the bracket 60 fixes the three power storage modules 10 included in the module row M (the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c).

[0063] A method for fixing the bracket 70 to the lower case 92 will be described with reference to Fig. 7. Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 3. In Fig. 7, the cooling pipe 41 is omitted.

[0064] Bracket 70 is fastened to reinforcing member 81 and fixed to lower case 92 via reinforcing member 81. Specifically, bracket 70 has a hole 715 extending in the Z direction. Reinforcing member 81 has a hole 817. Hole 817 is located below (on the Z2 side of) hole 715. More specifically, the position of hole 715 on the XY plane is the same as the position of hole 817 on the XY plane.

[0065] The shaft 571 of the bolt 57 is inserted into the hole 715 from above (Z1 side), passes through the holes 715 and 817, and is screwed into the nut 572 provided on the lower side (Z2 side) of the reinforcing member 81. The bracket 70 is fixed to the reinforcing member 81 by the bolt 57 and the nut 572. As described above, the reinforcing member 81 is fixed to the bottom wall 921 (see FIG. 2 ) of the lower case 92. Therefore, the bracket 70 is fixed to the lower case 92 via the reinforcing member 81.

[0066] As described above, the bracket 70 connects 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) in each module row M. The bracket 70 connecting the three power storage modules 10 in the module row M is fixed to the lower case 92 via the reinforcing member 81, thereby fixing the three power storage modules 10 included in the module row M. In other words, the bracket 70 fixes the three power storage modules 10 included in the module row M (the first power storage module 10a, the second power storage module 10b, and the third power storage module 10c).

[0067] The cooling structure of the power storage device 100 (see FIG. 2) will be described in detail with reference to FIGS. 8 to 14. FIG.

[0068] Fig. 8 is a perspective view that schematically shows the cooler 30, the brackets 60 and 70, and the cooling pipes 41 and 42. Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 3 .

[0069] 8, cooler 30 is made of metal (for example, aluminum) and has, for example, a plate-like outer shape.

[0070] Referring to FIG. 9 , the cooler 30 is disposed between the lower module 1 and the upper module 2. The cooler 30 includes a lower surface 34 and an upper surface 35 spaced apart in the Z direction. The upper surface 35 is disposed above (on the Z1 side of) the lower surface 34. The lower surface 34 is the end surface of the cooler 30 on the Z2 side. The upper surface 35 is the end surface of the cooler 30 on the Z1 side. A thermally conductive material 390 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.

[0071] The refrigerant supplied from the cooling pipes 41 passes through the cooler 30. As the refrigerant supplied from the cooling pipes 41 passes through the cooler 30, the lower module 1 and the upper module 2 that sandwich the cooler 30 are cooled.

[0072] The first cooler 30a is a cooler 30 provided in the first power storage module 10a. The first cooler 30a is disposed between the lower module 1 of the first power storage module 10a and the upper module 2 of the first power storage module 10a, and cools the first power storage module 10a with a refrigerant supplied from a cooling pipe 41.

[0073] The second cooler 30b is a cooler 30 provided in the second power storage module 10b. The second cooler 30b is disposed between the lower module 1 of the second power storage module 10b and the upper module 2 of the second power storage module 10b, and cools the second power storage module 10b with a refrigerant supplied from a cooling pipe 41.

[0074] The third cooler 30c is a cooler 30 provided in the third power storage module 10c. The third cooler 30c is disposed between the lower module 1 of the third power storage module 10c and the upper module 2 of the third power storage module 10c, and cools the third power storage module 10c with a refrigerant supplied from a cooling pipe 41.

[0075] 8 again, the cooler 30 includes a main body portion 31, an insertion portion 32, and an insertion portion 33. The insertion portion 32 protrudes from the main body portion 31 toward the X1 side. The insertion portion 33 protrudes from the main body portion 31 toward the X2 side.

[0076] The bracket 60 includes a side surface 61 and a side surface 62 that are spaced apart in the X direction. The side surface 62 is located closer to the X2 side than the side surface 61. A unit insertion opening 65 is formed in the side surface 62. The unit insertion opening 65 connects the inside of the bracket 60 to the outside of the bracket 60. The cooling unit R is inserted into the unit insertion opening 65. More specifically, the unit insertion opening 65 includes an insertion opening 65a, an insertion opening 65b, and an insertion opening 65c. Each of the insertion openings 65a, 65b, and 65c connects the inside of the bracket 60 to the outside of the bracket 60. The insertion portion 32 of the first cooler 30a is inserted into the insertion opening 65a. The insertion portion 32 of the second cooler 30b is inserted into the insertion opening 65b. The insertion portion 32 of the third cooler 30c is inserted into the insertion opening 65c. The insertion opening 65a is an example of a "first insertion opening" in the present disclosure. The insertion opening 65b is an example of a "second insertion opening" in the present disclosure. The cooling unit R is welded to the bracket 60.

[0077] The bracket 60 includes a lower surface 63 and an upper surface 64 that are spaced apart in the Z direction. The upper surface 64 is disposed higher (on the Z1 side) than the lower surface 63. A pipe insertion opening 66 is formed in the upper surface 64. The pipe insertion opening 66 connects the inside of the bracket 60 to the outside of the bracket 60. A sub-pipe 421 of the cooling pipe 42 is inserted into the pipe insertion opening 66.

[0078] The bracket 70 includes a side surface 71 and a side surface 72 that are spaced apart in the X direction. The side surface 72 is located closer to the X2 side than the side surface 71. A unit insertion opening 75 is formed in the side surface 71. The unit insertion opening 75 connects the inside of the bracket 70 to the outside of the bracket 70. The cooling unit R is inserted into the unit insertion opening 75. More specifically, the unit insertion opening 75 includes an insertion opening 75a, an insertion opening 75b, and an insertion opening 75c. Each of the insertion openings 75a, 75b, and 75c connects the inside of the bracket 70 to the outside of the bracket 70. The insertion portion 33 of the first cooler 30a is inserted into the insertion opening 75a. The insertion portion 33 of the second cooler 30b is inserted into the insertion opening 75b. The insertion portion 33 of the third cooler 30c is inserted into the insertion opening 75c. The insertion opening 75a is an example of a "first insertion opening" in the present disclosure. The insertion opening 75b is an example of a "second insertion opening" in the present disclosure. The cooling unit R is welded to the bracket 70.

[0079] The bracket 70 includes a lower surface 73 and an upper surface 74 that are spaced apart in the Z direction. The upper surface 74 is disposed higher (on the Z1 side) than the lower surface 73. A pipe insertion opening 76 is formed in the upper surface 74. The pipe insertion opening 76 connects the inside of the bracket 70 with the outside of the bracket 70. A sub-pipe 411 of the cooling pipe 41 is inserted into the pipe insertion opening 76.

[0080] The path through which the refrigerant flows from the cooling pipe 41 to the first cooler 30a will be described with reference to Fig. 10 and Fig. 11. Fig. 10 is a cross-sectional view taken along line XX in Fig. 3. Fig. 11 is a cross-sectional view taken along line XI-XI in Fig. 3. In Fig. 10 and Fig. 11, the path through which the refrigerant flows is indicated by dotted lines. Note that, in consideration of ease of viewing the drawings, the cooling pipe 42 is omitted from Fig. 11.

[0081] Referring to FIG. 11, a flow path 750 through which a refrigerant flows is formed inside the bracket 70. The flow path 750 connects the pipe insertion opening 76 and the unit insertion opening 75 (see FIGS. 8 and 10). More specifically, the flow path 750 includes a first supply flow path 751, a second supply flow path 752, and a third supply flow path 753. The first supply flow path 751 connects the pipe insertion opening 76 and the insertion opening 75a (see FIG. 10). The second supply flow path 752 branches off from the first supply flow path 751 at a branch point P1 and connects the branch point P1 to the insertion opening 75b (see FIG. 8). The branch point P1 is located on the first supply flow path 751. The third supply flow path 753 branches off from the first supply flow path 751 at the branch point P1 and connects the branch point P1 to the insertion opening 75c (see FIG. 8). The first supply flow path 751 is an example of the "first flow path" in the present disclosure. The second supply flow path 752 is an example of the "second flow path" in the present disclosure.

[0082] 10 and 11, the sub-pipe 411 is inserted into the pipe insertion port 76 from above (Z1 side). More specifically, the power storage device 100 (see FIG. 2) further includes a joint 470. The joint 470 has a hole 471 formed therein that extends in the Z direction and through which the sub-pipe 411 passes. The sub-pipe 411 is inserted into the hole 471 from above (Z1 side). The sub-pipe 411 passes through the hole 471 and is inserted into the pipe insertion port 76 from above (Z1 side). The sub-pipe 411 passes through the pipe insertion port 76 and is connected to the first supply flow path 751 of the flow path 750.

[0083] 11, the sub-pipe 411 is fixed to the bracket 70 by a joint 470 and a bolt 59. More specifically, the power storage device 100 (see FIG. 2) further includes the bolt 59. The joint 470 has a hole 472 formed therein, which extends in the Z direction and through which the bolt 59 passes. The bracket 70 has a hole 77 formed therein, which extends in the Z direction. The position of the hole 472 on the XY plane is the same as the position of the hole 77 on the XY plane. The shaft 591 of the bolt 59 is inserted into the hole 472 from above (the Z1 side). The shaft 591 passes through the hole 472 and is inserted into the hole 77 from above (the Z1 side). By fixing the joint 470 through which the sub-pipe 411 passes to the bracket 70 by the bolt 59, the sub-pipe 411 is also fixed to the bracket 70.

[0084] 10 , the insertion portion 33 of the first cooler 30a is inserted into the insertion opening 75a from the X1 side. The insertion portion 33 of the first cooler 30a passes through the insertion opening 75a and is connected to a first supply flow path 751 of the flow path 750. The first cooler 30a is welded to the bracket 70. As an example, the insertion portion 33 of the first cooler 30a is joined to the bracket 70 with a brazing material 790. By welding the first cooler 30a to the bracket 70, the first cooler 30a is fixed to the bracket 70.

[0085] Since the sub-pipe 411 and the first cooler 30a are connected to the first supply passage 751, the refrigerant supplied from the sub-pipe 411 passes through the first supply passage 751 and is supplied to the first cooler 30a.

[0086] 11, the second supply flow path 752 and the third supply flow path 753 branch off from the first supply flow path 751 at a branch point P1. Therefore, the refrigerant supplied from the sub-pipe 411 is also supplied to the second supply flow path 752 and the third supply flow path 753.

[0087] The path through which the refrigerant flows from the cooling pipe 41 to the second cooler 30b will be described with reference to Figures 11 and 12. Figure 12 is a cross-sectional view taken along line XII-XII in Figure 3. In Figure 12, the path through which the refrigerant flows is indicated by a dotted line.

[0088] 12, the insertion portion 33 of the second cooler 30b is inserted into the insertion opening 75b from the X1 side. The insertion portion 33 of the second cooler 30b passes through the insertion opening 75b and is connected to the second supply flow path 752 of the flow path 750. The second cooler 30b is welded to the bracket 70. As an example, the insertion portion 33 of the second cooler 30b is joined to the bracket 70 with a brazing material 790. By welding the second cooler 30b to the bracket 70, the second cooler 30b is fixed to the bracket 70.

[0089] Referring to Figures 11 and 12, the second supply flow path 752 branches off from the first supply flow path 751, and the second cooler 30b is connected to the second supply flow path 752, so that the refrigerant supplied from the sub-pipe 411 passes through the first supply flow path 751 and the second supply flow path 752 and is supplied to the second cooler 30b.

[0090] The path along which the refrigerant flows from the cooling pipe 41 to the third cooler 30c will be described with reference to FIGS.

[0091] 8, the insertion portion 33 of the third cooler 30c is inserted into the insertion opening 75c from the X1 side. The insertion portion 33 of the third cooler 30c passes through the insertion opening 75c and is connected to the third supply flow path 753 of the flow path 750 (see FIG. 11). The third cooler 30c is also welded to the bracket 70. As an example, the insertion portion 33 of the third cooler 30c is joined to the bracket 70 with a brazing material 790 (see FIGS. 10 and 12). By welding the third cooler 30c to the bracket 70, the third cooler 30c is fixed to the bracket 70.

[0092] Referring to Figure 11, the third supply flow path 753 branches off from the first supply flow path 751, and the third cooler 30c (see Figure 8) is connected to the third supply flow path 753, so that the refrigerant supplied from the sub-pipe 411 passes through the first supply flow path 751 and the third supply flow path 753 and is supplied to the third cooler 30c.

[0093] The path through which the refrigerant flows within the cooler 30 will be described with reference to Fig. 13. Fig. 13 is a plan view schematically showing the path through which the refrigerant flows. In Fig. 13, the path through which the refrigerant flows is indicated by dotted lines.

[0094] The refrigerant supplied from the sub-pipe 411 via the flow path 750 (see FIG. 11) flows into each cooler 30 from the X2 side. The refrigerant flows in parallel through the first cooler 30a, the second cooler 30b, and the third cooler 30c. A flow path is formed inside the cooler 30 so that the refrigerant travels back and forth in the X direction while proceeding to the X1 side. The refrigerant that has flowed into the cooler 30 flows along the flow path inside the cooler 30, passes through a flow path 650 (see FIG. 14) formed inside the bracket 60, and is discharged to the cooling pipe 42 (see FIG. 8).

[0095] The path through which the refrigerant flows from the first cooler 30a to the cooling pipe 42 will be described with reference to Fig. 10 and Fig. 14. Fig. 14 is a cross-sectional view taken along line XIV-XIV in Fig. 3. In Fig. 14, the path through which the refrigerant flows is indicated by a dotted line. Note that, in consideration of ease of viewing the drawing, the cooling pipe 41 is omitted from Fig. 14.

[0096] Referring to FIG. 14, a flow path 650 through which a refrigerant flows is formed inside the bracket 60. The flow path 650 connects the pipe insertion opening 66 and the unit insertion opening 65 (see FIGS. 8 and 10). More specifically, the flow path 650 includes a first discharge flow path 651, a second discharge flow path 652, and a third discharge flow path 653. The first discharge flow path 651 connects the pipe insertion opening 66 and the insertion opening 65a (see FIG. 10). The second discharge flow path 652 branches from the first discharge flow path 651 at a branch point Q1 and connects the branch point Q1 and the insertion opening 65b (see FIG. 8). The branch point Q1 is located on the first discharge flow path 651. The third discharge flow path 653 branches from the first discharge flow path 651 at the branch point Q1 and connects the branch point Q1 and the insertion opening 65c (see FIG. 8). The first discharge flow path 651 is an example of a "first flow path" in the present disclosure. The second discharge flow path 652 is an example of a "second flow path" in the present disclosure.

[0097] 10 and 14, the sub-pipe 421 is inserted into the pipe insertion port 66 from above (Z1 side). More specifically, the power storage device 100 (see FIG. 2) further includes a joint 460. The joint 460 has a hole 461 formed therein, extending in the Z direction, through which the sub-pipe 421 passes. The sub-pipe 421 is inserted into the hole 461 from above (Z1 side). The sub-pipe 421 passes through the hole 461 and is inserted into the pipe insertion port 66 from above (Z1 side). The sub-pipe 421 passes through the pipe insertion port 66 and is connected to a first discharge flow path 651 of the flow path 650.

[0098] 14, the sub-pipe 421 is fixed to the bracket 60 by a joint 460 and a bolt 58. More specifically, the power storage device 100 (see FIG. 2) further includes the bolt 58. The joint 460 has a hole 462 formed therein, which extends in the Z direction and through which the bolt 58 passes. The bracket 60 has a hole 67 formed therein, which extends in the Z direction. The position of the hole 462 on the XY plane is the same as the position of the hole 67 on the XY plane. The shaft 581 of the bolt 58 is inserted into the hole 462 from above (the Z1 side). The shaft 581 passes through the hole 462 and is inserted into the hole 67 from above (the Z1 side). By fixing the joint 460 through which the sub-pipe 421 passes to the bracket 60 by the bolt 58, the sub-pipe 421 is also fixed to the bracket 60.

[0099] 10 , the insertion portion 32 of the first cooler 30a is inserted into the insertion opening 65a from the X2 side. The insertion portion 32 of the first cooler 30a passes through the insertion opening 65a and is connected to the first discharge flow path 651 of the flow path 650. The first cooler 30a is welded to the bracket 60. As an example, the insertion portion 32 of the first cooler 30a is joined to the bracket 60 with a brazing material 790. By welding the first cooler 30a to the bracket 60, the first cooler 30a is fixed to the bracket 60.

[0100] Since the sub-pipe 421 and the first cooler 30a are connected to the first discharge flow path 651, the refrigerant discharged from the first cooler 30a passes through the first discharge flow path 651 and is discharged to the sub-pipe 421.

[0101] 14, the second discharge flow path 652 and the third discharge flow path 653 branch off from the first discharge flow path 651 at a branch point Q1. Therefore, the refrigerant that has flowed through the second discharge flow path 652 and the third discharge flow path 653 to the branch point Q1 passes through the first discharge flow path 651 and is discharged to the sub-pipe 421.

[0102] The path along which the refrigerant flows from the second cooler 30b to the cooling pipe 42 will be described with reference to FIGS.

[0103] 12, the insertion portion 32 of the second cooler 30b is inserted into the insertion opening 65b from the X2 side. The insertion portion 32 of the second cooler 30b passes through the insertion opening 65b and is connected to the second discharge flow path 652 of the flow path 650. The second cooler 30b is welded to the bracket 60. As an example, the insertion portion 32 of the second cooler 30b is joined to the bracket 60 with a brazing material 790. By welding the second cooler 30b to the bracket 60, the second cooler 30b is fixed to the bracket 60.

[0104] Referring to Figures 12 and 14, the second discharge flow path 652 branches off from the first discharge flow path 651, and the second cooler 30b is connected to the second discharge flow path 652, so that the refrigerant discharged from the second cooler 30b passes through the second discharge flow path 652 and the first discharge flow path 651 and is discharged into the sub-pipe 421.

[0105] The path through which the refrigerant flows from the third cooler 30c to the cooling pipe 42 will be described with reference to FIGS.

[0106] 8, the insertion portion 32 of the third cooler 30c is inserted into the insertion opening 65c from the X2 side. The insertion portion 32 of the third cooler 30c passes through the insertion opening 65c and is connected to the third discharge flow path 653 of the flow path 650 (see FIG. 14). The third cooler 30c is welded to the bracket 60. As an example, the insertion portion 32 of the third cooler 30c is joined to the bracket 60 with a brazing material 790 (see FIGS. 10 and 12). By welding the third cooler 30c to the bracket 60, the third cooler 30c is fixed to the bracket 60.

[0107] Referring to Figure 14, the third discharge flow path 653 branches off from the first discharge flow path 651, and the third cooler 30c (see Figure 8) is connected to the third discharge flow path 653, so that the refrigerant discharged from the third cooler 30c passes through the third discharge flow path 653 and the first discharge flow path 651 and is discharged into the sub-pipe 421.

[0108] As described above, in the energy storage device 100 of this embodiment, the bracket 70 (60) is fixed to the lower case 92 and fixes the energy storage unit 110. The bracket 70 (60) is formed with a pipe insertion opening 76 (66) through which the cooling pipe 41 (42) is inserted and a unit insertion opening 75 (65) through which the cooling unit R is inserted. A flow path 750 (650) through which the refrigerant flows is formed inside the bracket 70 (60), and the flow path 750 (650) connects the pipe insertion opening 76 (66) and the unit insertion opening 75 (65). Therefore, the insertion position of the cooling pipe 41 (42) is determined regardless of the insertion position of the cooling unit R. Therefore, the energy storage device 100 of this embodiment can improve the ease of assembly of the cooling pipe 41 (42) compared to a case in which the cooling unit R and the cooling pipe 41 (42) are directly connected.

[0109] Furthermore, in the energy storage device 100 of this embodiment, the cooling unit R and the cooling pipe 41 (42) are connected via a flow path 750 (650) formed in the bracket 70 (60). Therefore, the energy storage device 100 of this embodiment can absorb any deviation in the mounting position of the cooling unit R in the X direction within the range in which the cooling unit R can be inserted into the unit insertion opening 75 (65). Furthermore, the energy storage device 100 of this embodiment can absorb any deviation in the length of the cooling unit R in the X direction (manufacturing variations) within the range in which the cooling unit R can be inserted into the unit insertion opening 75 (65). Furthermore, the energy storage device 100 of this embodiment can absorb any deviation in the mounting position of the cooling pipe 41 (42) in the up-down direction within the range in which the cooling pipe 41 (42) can be inserted into the pipe insertion opening 76 (66). Furthermore, the power storage device 100 of this embodiment can absorb deviations (manufacturing variations) in the vertical length of the cooling pipes 41 (42) within the range in which the cooling pipes 41 (42) can be inserted into the pipe insertion openings 76 (66).

[0110] Furthermore, in the energy storage device 100 of this embodiment, the energy storage unit 110 includes an energy storage module 10 including a lower module 1 and an upper module 2. The cooling unit R is disposed between the lower module 1 and the upper module 2. Therefore, the energy storage device 100 of this embodiment can efficiently cool the lower module 1 and the upper module 2.

[0111] In the energy storage device 100 of this embodiment, the cooling unit R is disposed between the lower module 1 and the upper module 2. The bracket 70 (60) connects the lower module 1 and the upper module 2. Therefore, the energy storage device 100 of this embodiment can prevent the lower module 1, the upper module 2, and the cooling unit R from being misaligned.

[0112] Furthermore, in the energy storage device 100 of this embodiment, the energy storage unit 110 includes a first energy storage module 10a and a second energy storage module 10b horizontally adjacent to the first energy storage module 10a. The cooling unit R includes a first cooler 30a that cools the first energy storage module 10a with a refrigerant and a second cooler 30b that cools the second energy storage module 10b with a refrigerant. The bracket 70 is formed with a pipe insertion opening 76 into which the cooling pipe 41 is inserted, an insertion opening 75a into which the first cooler 30a is inserted, and an insertion opening 75b into which the second cooler 30b is inserted. The flow path 750 includes a first supply flow path 751 that connects the pipe insertion opening 76 and the insertion opening 75a, and a second supply flow path 752 that branches from the first supply flow path 751 at a branch point P1 and connects the branch point P1 and the insertion opening 75b. As a result, the refrigerant flows in parallel through the first cooler 30a and the second cooler 30b. Therefore, the energy storage device 100 of this embodiment can suppress heat transfer to the second energy storage module 10b when thermal runaway occurs in the first energy storage module 10a.

[0113] Furthermore, in the energy storage device 100 of this embodiment, the first energy storage module 10a and the second energy storage module 10b are connected via a bracket 70. Furthermore, a coolant supplied from the cooling pipe 41 passes through a flow path 750 formed in the bracket 70. Therefore, in the energy storage device 100 of this embodiment, when the first energy storage module 10a is experiencing thermal runaway, heat transfer to the second energy storage module 10b via the bracket 70 can be suppressed.

[0114] Furthermore, in the energy storage device 100 of this embodiment, the first energy storage module 10a includes a first lower module and a first upper module arranged above the first lower module. The second energy storage module 10b includes a second lower module and a second upper module arranged above the second lower module. The first cooler 30a is arranged between the first lower module and the first upper module, and the second cooler 30b is arranged between the second lower module and the second upper module. Therefore, the energy storage device 100 of this embodiment can efficiently cool the first lower module and the first upper module. Furthermore, the energy storage device 100 of this embodiment can efficiently cool the second lower module and the second upper module.

[0115] In the energy storage device 100 of this embodiment, the first cooler 30a is disposed between the first lower module and the first upper module, and the second cooler 30b is disposed between the second lower module and the second upper module. The bracket 70 (60) connects the first lower module and the first upper module, and also connects the second lower module and the second upper module. Therefore, the energy storage device 100 of this embodiment can suppress misalignment of the first lower module, the first upper module, the second lower module, the second upper module, the first cooler 30a, and the second cooler 30b.

[0116] Furthermore, in the power storage device 100 of this embodiment, the cooling unit R is welded to the bracket 70 (60). This makes it possible for the power storage device 100 of this embodiment to prevent the cooling unit R from coming off the bracket 70 (60).

[0117] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present disclosure is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0118] 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 portion, 11a, 12a lower connecting portion, 11b, 12b upper connecting portion, 13a, 13b, 14a, 14b, 461, 462, 471, 472, 615, 715, 815, 817 hole, 30 cooler, 30a first cooler, 30b second cooler, 30c third cooler, 31 main body portion, 32, 33 insertion portion, 34, 63, 73 lower surface, 35, 64, 74 upper surface, 41, 42 cooling pipe, 51 to 54, 56 to 59 bolt, 60, 70 Brackets, 61, 62, 71, 72, 111, 112 Sides, 65, 75 Unit insertion ports, 65a, 65b, 65c, 75a, 75b, 75c Insertion ports, 66, 76 Pipe insertion ports, 67, 77, 612a, 612b, 712a, 712b Holes, 81, 82 Reinforcing members, 90 Storage cases, 91 Upper cases, 92 Lower cases, 100 Energy storage devices, 110 Energy storage units, 120 Equipment units, 150 Vehicles, 390 Thermal conductive materials, 410, 420 Main piping, 411, 421 Sub-piping, 460, 470 Joints, 511, 521, 531, 541, 561, 571, 581, 591 Shafts, 562, 572 Nut, 650, 750 flow path, 651 first discharge flow path, 652 second discharge flow path, 653 third discharge flow path, 751 first supply flow path, 752 second supply flow path, 753 third supply flow path, 790 brazing material, 921 bottom wall, 922 peripheral wall, 931 to 934 side walls, M module row, P1, Q1 branch point, R cooling unit.

Claims

1. A power storage unit; A cooling pipe through which a refrigerant passes; a cooling unit that cools the electricity storage unit with the refrigerant; a housing case including an upper case and a lower case disposed below the upper case, the housing case housing the power storage unit; a fixing member fixed to the lower case to fix the power storage unit, the fixing member is formed with a pipe insertion opening into which the cooling pipe is inserted and a unit insertion opening into which the cooling unit is inserted, A flow path through which the refrigerant passes is formed inside the fixing member, The flow path connects the pipe insertion port and the unit insertion port.

2. the power storage unit includes a power storage module; the power storage module includes a lower module and an upper module disposed above the lower module, The power storage device according to claim 1 , wherein the cooling unit is disposed between the lower module and the upper module.

3. The power storage device according to claim 2 , wherein the fixing member connects the lower module and the upper module.

4. the power storage unit includes a first power storage module and a second power storage module horizontally adjacent to the first power storage module, the cooling unit includes a first cooler that cools the first power storage module with the refrigerant, and a second cooler that cools the second power storage module with the refrigerant; the unit insertion opening includes a first insertion opening into which the first cooler is inserted and a second insertion opening into which the second cooler is inserted, 2. The energy storage device according to claim 1, wherein the flow path includes a first flow path connecting the piping insertion port and the first insertion port, and a second flow path branching from the first flow path at a branch point located on the first flow path and connecting the branch point and the second insertion port.

5. the first power storage module includes a first lower module and a first upper module disposed above the first lower module, the second power storage module includes a second lower module and a second upper module disposed above the second lower module, the first cooler is disposed between the first lower module and the first upper module; The power storage device according to claim 4 , wherein the second cooler is disposed between the second lower module and the second upper module.

6. The power storage device according to claim 5 , wherein the fixing member connects the first lower module and the first upper module, and connects the second lower module and the second upper module.

7. 7. The power storage device according to claim 1, wherein the cooling unit is welded to the fixing member.

Images