Power storage device

Abstract

To provide a power storage device which enables suppression of occurrence of a short circuit caused by leakage of a cooling medium from a cooler.SOLUTION: A power storage device 10 includes: at least one power-storage cell 100; an upper cover 320 arranged above the at least one power-storage cell; a cooler 200 above the upper cover, the cooler cooling the at least one power-storage cell; and a junction box 842 provided above the upper cover. The cooler 200 is in thermal contact with both the at least one power-storage cell and the junction box.SELECTED DRAWING: Figure 8

Description

[Technical Field]

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

[0002] For example, JP 2022-525014 A discloses a power battery pack including a plurality of cells and a housing device. The side of the case of each cell is provided with an external terminal and an explosion-proof valve. A module top plate with a cooling structure is disposed on the top surface of the cells. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2022-525014 Summary of the Invention [Problem to be solved by the invention]

[0004] In the power battery pack described in JP 2022-525014 A, for example, a junction box may be provided above the storage device, in which case a cooler is required to cool the junction box.

[0005] An object of the present disclosure is to provide an electricity storage device that makes it possible to omit a dedicated cooler for cooling a junction box. [Means for solving the problem]

[0006] A storage device according to one aspect of the present disclosure includes at least one storage cell, an upper cover arranged above the at least one storage cell, a cooler that cools the at least one storage cell, and a junction box provided above the upper cover, wherein the cooler is in thermal contact with both the at least one storage cell and the junction box. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an electricity storage device that makes it possible to omit a dedicated cooler for cooling a junction box. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram schematically illustrating a vehicle including a power storage device according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective view schematically showing the power storage device and a frame member. [Figure 3] FIG. 2 is an exploded perspective view schematically illustrating the electricity storage device. [Figure 4] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 5] FIG. 5 is a cross-sectional view taken along line VV in FIG. [Figure 6] FIG. 2 is a plan view schematically illustrating a cooler. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 2 is a cross-sectional view showing a schematic diagram of an equipment unit. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The present disclosure will be described with reference to the accompanying drawings, in which the same or corresponding elements are designated by the same reference numerals.

[0010] Fig. 1 is a diagram schematically showing a vehicle including a power storage device according to an embodiment of the present disclosure. Fig. 2 is a perspective view schematically showing the power storage device and a frame member. Fig. 3 is an exploded perspective view schematically showing the power storage device. Fig. 4 is a cross-sectional view taken along line IV-IV in Fig. 2. Fig. 5 is a cross-sectional view taken along line VV in Fig. 4.

[0011] 1, a vehicle 1 includes a vehicle body 2 and a power storage device 10. Examples of the vehicle 1 include a hybrid electric vehicle, a plug-in hybrid electric vehicle, and an electric vehicle (battery electric vehicle).

[0012] 1 and 2, the vehicle body 2 includes a frame member 20. The frame member 20 is disposed at the bottom of the vehicle body 2. The frame member 20 has a pair of first frames 21, a pair of second frames 22, a first cross frame 23, and a second cross frame 24.

[0013] The pair of first frames 21 face each other in a first direction. Each first frame 21 has a shape extending along a second direction that is perpendicular to both the first direction and the up-down direction. For example, the first direction may be a direction parallel to the front-to-rear direction of the vehicle 1, and the second direction may be a direction parallel to the left-to-right direction (width direction) of the vehicle 1.

[0014] The pair of second frames 22 face each other in the second direction. Each second frame 22 has a shape extending along the first direction. An end of each second frame 22 in the first direction is connected to the first frame 21. The pair of second frames 22, together with the pair of first frames 21, are formed in a substantially rectangular tubular shape that surrounds the power storage device 10.

[0015] The first cross frame 23 is disposed between the pair of first frames 21 and connects the pair of second frames 22 to each other.

[0016] The second cross frame 24 is disposed between the pair of first frames 21 and connects the pair of second frames 22. The second cross frame 24 is spaced apart from the first cross frame 23 in the first direction. Each of the first cross frame 23 and the second cross frame 24 constitutes, for example, a seat cross.

[0017] The energy storage device 10 is attached to a frame member 20. As shown in FIG. 2, the energy storage device 10 is disposed below the first cross frame 23 and the second cross frame 24. As shown in FIGS. 1 to 5, the energy storage device 10 includes four energy storage stacks 11 to 14, a cooler 200, a housing 300, an opposing member 700, and an equipment unit 800. The number of energy storage stacks is not limited to four. In FIG. 3, the energy storage stacks 11 to 14 are not shown.

[0018] Each of the power storage stacks 11 to 14 includes at least one power storage cell 100. In this embodiment, each of the power storage stacks 11 to 14 includes a plurality of (for example, 50) power storage cells 100 arranged side by side along a first direction. Each of the power storage stacks 11 to 14 is formed in the shape of a rectangular parallelepiped that is long in the first direction. As shown in FIG. 2, the four power storage stacks 11 to 14 are arranged side by side along a second direction.

[0019] 4, a pair of end plates 51 are provided on both sides of the plurality of storage cells 100 in the first direction to sandwich the plurality of storage cells 100 from both sides in the first direction. A monitoring unit (Smart Battery Management) 52 is arranged on the outside of each end plate 51 in the first direction.

[0020] As shown in FIG. 5, each storage cell 100 has an electrode assembly 110, a cell case 120, and a pair of external terminals .

[0021] The electrode assembly 110 may be formed as a wound body in which a positive electrode sheet and a negative electrode sheet are wound with a separator interposed therebetween, or may be formed as a laminate in which a positive electrode sheet and a negative electrode sheet are stacked with a separator interposed therebetween. The electrode assembly 110 is formed in a shape that is long in the second direction.

[0022] The cell case 120 houses the electrode assembly 110. The cell case 120 is formed in a rectangular parallelepiped shape. The cell case 120 is made of a metal such as aluminum. The cell case 120 includes a valve mounting surface 121 and a terminal mounting surface 122.

[0023] A safety valve SV is provided on the valve installation surface 121. In this embodiment, the valve installation surface 121 is formed by the lower surface of the cell case 120. That is, the safety valve SV is provided on the lower surface of the cell case 120 in the energy storage cell 100. Note that in Fig. 5, the discharge direction of gas that can be discharged from the safety valve SV is indicated by a two-dot chain line.

[0024] An external terminal 130 is provided on the terminal installation surface 122. In this embodiment, the terminal installation surface 122 is configured by a side surface of the cell case 120 in the second direction.

[0025] Each external terminal 130 is provided on a terminal installation surface 122 (a side surface in the second direction in this embodiment) of the cell casing 120. One of the pair of external terminals 130 is provided on the terminal installation surface 122 on one side of the cell casing 120 in the second direction. The other of the pair of external terminals 130 is provided on the terminal installation surface 122 on the other side of the cell casing 120 in the second direction.

[0026] The housing 300 houses at least one energy storage cell 100. In this embodiment, the housing 300 houses four energy storage stacks 11 to 14. As shown in Fig. 5 , the housing 300 has a lower case 310, an upper cover 320, a panel member 330, a space forming member 350, and a cross member 360.

[0027] The lower case 310 is open upward and has a bottom surface 312 and a peripheral wall 314.

[0028] The bottom surface 312 is located below each of the power storage stacks 11 to 14. The bottom surface 312 may be formed in a flat plate shape.

[0029] Peripheral wall 314 stands upright from the peripheral edge of bottom surface 312. Peripheral wall 314 has a shape that surrounds the lower part of each of power storage stacks 11-14.

[0030] The upper cover 320 is disposed above at least one energy storage cell 100. In this embodiment, the upper cover 320 is disposed above the four energy storage stacks 11 to 14. The upper cover 320 accommodates the four energy storage stacks 11 to 14 together with the lower case 310. Specifically, the upper cover 320 accommodates the four energy storage stacks 11 to 14 together with the lower case 310 in a sealed state. The peripheral edge of the upper cover 320 is connected to the peripheral edge of the lower case 310 by bolts or the like via a sealing member.

[0031] The upper cover 320 has a top portion 321 and four recesses 322 .

[0032] The top portion 321 is formed flat and overlaps the ends of the power storage stacks in the second direction in the up-down direction.

[0033] Each recess 322 is recessed downward from the top portion 321. Each recess 322 is formed flat. Each recess is formed above the center of each power storage stack in the second direction. As shown in FIG. 5 , the length of each recess 322 in the second direction is shorter than the length of the power storage cell 100 in the second direction. Each recess 322 is in contact with the upper surface of the cell casing 120 via a thermally conductive adhesive 910.

[0034] The top surface of the cell casing 120 has a contact surface 123 and a separation surface 124 .

[0035] The contact surface 123 is in direct or indirect contact with the upper cover 320. In this embodiment, the contact surface 123 is in contact with the recess 322 via a thermally conductive adhesive 910.

[0036] The separation surface 124 is formed on the outer side of the contact surface 123 in the second direction. The separation surface 124 is spaced apart from the upper cover 320. The separation surface 124 may be formed flush with the contact surface 123.

[0037] The panel member 330 is provided below the lower case 310. The panel member 330 has a function of protecting the lower case 310. The panel member 330 may be formed in a flat plate shape. As shown in Fig. 5, the peripheral edge of the panel member 330 is connected to the lower case 310 via a bracket 80.

[0038] The space forming member 350 forms a space S together with the bottom surface 312 of the lower case 310. The space forming member 350 is provided between the bottom surface 312 of the lower case 310 and at least one energy storage cell 100. Specifically, the space forming member 350 is provided between the bottom surface 312 and each of the energy storage stacks 11 to 14. That is, in this embodiment, four spaces S are formed inside the housing 300.

[0039] Each space S functions as a smoke exhaust path (hereinafter referred to as a "smoke exhaust path S"). The smoke exhaust path S is a path for discharging gas discharged from the safety valve SV to the outside of the housing 300. Each smoke exhaust path S is connected to a common space within the housing 300 at the end of the smoke exhaust path S in the first direction.

[0040] The space forming member 350 has through holes h provided below the safety valves SV. When gas is discharged from the safety valves SV of the energy storage cells 100, the gas flows into the smoke exhaust path S through the through holes h. In this embodiment, the space forming member 350 has the through holes h provided in portions facing the respective safety valves SV.

[0041] As shown in FIG. 4, an explosion-proof valve 390 is provided in a portion of the peripheral wall 314 that faces the smoke exhaust path S in the first direction. The explosion-proof valve 390 is provided in the common space within the housing 300. The explosion-proof valve 390 releases pressure within the housing 300. The explosion-proof valve 390 opens when the pressure within the housing 300 reaches or exceeds a reference value. The explosion-proof valve 390 is configured as a check valve. As shown in FIG. 4, when gas is exhausted from any of the energy storage cells 100, the gas spreads in the first direction through the smoke exhaust path S and is exhausted to the outside of the housing 300 through the explosion-proof valve 390.

[0042] As shown in FIG. 5, the space forming member 350 has a base portion 351 and a support portion 352.

[0043] The base portion 351 is connected to the bottom surface 312 of the lower case 310 by welding or the like. The base portion 351 is formed flat. The base portion 351 extends in the first direction.

[0044] The support portion 352 protrudes from the base portion 351. The support portion 352 supports the plurality of energy storage cells 100 in each energy storage stack. The support portion 352 supports the plurality of energy storage cells 100 via adhesive members 920.

[0045] The support portion 352 is provided with a mounting portion 353. As shown in Fig. 5, the mounting portion 353 is recessed downward from the support portion 352. A through-hole h is formed in the mounting portion 353 at a location facing the safety valve SV.

[0046] As shown in FIG. 5, an insulating plate 250 may be placed on the placing portion 353. The insulating plate 250 is provided between each through-hole h of the space forming member 350 and the safety valve SV of the energy storage cell 100. Each insulating plate 250 is made of, for example, mica, which is a natural inorganic mineral solidified by heat pressing. Each insulating plate 250 has a shape that covers the through-hole h. A notch may be formed in each insulating plate 250 at a portion that overlaps the edge of the through-hole h. The insulating plate 250 may be attached to the bottom surface of the cell casing 120 so as to cover the safety valve SV.

[0047] The cross member 360 is connected by welding or the like to a portion of the base 351 between a pair of adjacent power storage stacks. For example, FIG. 5 shows a cross member 360 connected to the base 351 provided in a portion between a plurality of first power storage cells 101 (see FIG. 5) included in the power storage stack 11 arranged outermost in the second direction and a plurality of second power storage cells 102 (see FIG. 5) included in the power storage stack 12 adjacent to the power storage stack 11. The cross member 360 extends along the first direction. The cross member 360 is connected to the peripheral wall 314. The cross member 360 may be connected to the pair of first frames 21 via brackets (not shown).

[0048] As shown in FIG. 5, the cross member 360 has a reinforcing portion 362 and a connecting bottom surface 364 .

[0049] The reinforcing portion 362 has a shape that is convex in a direction away from the base portion 351. The reinforcing portion 362 is disposed below the external terminals 130 of the energy storage cell 100. The reinforcing portion 362 overlaps in the up-down direction with both of a pair of external terminals 130 that face each other in the second direction.

[0050] The connection bottom surface 364 extends outward in the second direction from the lower end of the reinforcing portion 362. The connection bottom surface 364 is connected to the base portion 351 by welding or the like. The connection bottom surface 364 is formed flat.

[0051] The cooler 200 cools at least one energy storage cell 100. As shown in FIGS. 4, 5, and 8, the cooler 200 is disposed on the upper surface of the upper cover 320. The cooler 200 is in thermal contact with at least one energy storage cell 100 via the upper surface of the upper cover 320. In this embodiment, the cooler 200 cools each of the energy storage stacks 11 to 14 via the upper surface of the upper cover 320. A cooling medium (water, etc.) flows inside the cooler 200.

[0052] 4 and 5, the cooler 200 forms at least a part of the floor 30 of the vehicle compartment. In addition to the cooler 200, the floor 30 of the vehicle compartment may include floor components (insulating material, cushioning material, carpet, etc.) placed on the cooler 200. Note that the floor components are not shown in FIG. 2.

[0053] Fig. 6 is a plan view schematically showing the cooler. Fig. 7 is a cross-sectional view taken along line VII-VII in Fig. 6. As shown in Figs. 6 and 7, the cooler 200 has four cooling sections 210, a folded section 220, and a connecting section 230.

[0054] Each cooling section 210 has a shape that extends elongatedly in the first direction. Each cooling section 210 cools one energy storage stack. Note that in FIG. 6, each energy storage stack 11 to 14 is indicated by a two-dot chain line. Each cooling section 210 is disposed in a recess 322 of the upper cover 320. A thermally conductive adhesive 910 is provided between each cooling section 210 and the recess 322. The thermally conductive adhesive 910 extends along the first direction. Each cooling section 210 is in thermal contact with the upper surface of each energy storage cell 100. In this embodiment, each cooling section 210 is in contact with the upper surface of each energy storage cell 100 via the thermally conductive adhesive 910 and the upper cover 320. In addition, thermal contact includes a state in which the cooling unit 210 contacts the storage cell 100 only via the upper cover 320, and a state in which the cooling unit 210 contacts the storage cell 100 indirectly via a thermally conductive member (such as an adhesive or a fixing member).

[0055] As shown in FIGS. 5 and 6, each cooling section 210 has an upstream flow path 211 and a downstream flow path 212.

[0056] The upstream flow path 211 is provided on the upstream side in the flow direction of the cooling medium. The downstream flow path 212 is provided on the downstream side in the flow direction of the cooling medium. As shown in FIG. 6, the upstream flow path 211 and the downstream flow path 212 have a shape that extends along a first direction. The upstream flow path 211 and the downstream flow path 212 are adjacent to each other in a second direction. The cooling medium flows through the upstream flow path 211 from one side to the other side in the first direction, and flows through the downstream flow path 212 from the other side to one side in the first direction.

[0057] The turning portion 220 connects the downstream end of the upstream flow passage 211 and the upstream end of the downstream flow passage 212. Therefore, as shown by the arrows in Fig. 6, the cooling medium flows through the upstream flow passage 211, the turning portion 220, and the downstream flow passage 212 in this order.

[0058] The connecting portion 230 connects the four cooling portions 210 to one another. As shown in FIG.

[0059] The connecting portion main body 232 connects the four cooling portions 210 to one another. Therefore, the cooling media that have flowed through each downstream flow path 212 join together inside the connecting portion main body 232. The connecting portion main body 232 may be formed in a substantially rectangular parallelepiped shape.

[0060] The partition wall 234 divides the interior of the connecting portion main body 232 into two spaces. In this embodiment, as shown in FIG. 7, the partition wall 234 divides the interior of the connecting portion main body 232 into upper and lower halves. The upstream ends of the upstream flow paths 211 are connected to the space above the partition wall 234 in the connecting portion main body 232 (hereinafter referred to as the "upstream space S11"), and the downstream ends of the downstream flow paths 212 are connected to the space below the partition wall 234 in the connecting portion main body 232 (hereinafter referred to as the "downstream space S12"). Therefore, the cooling medium that flows into the upstream space S11 flows into each upstream flow path 211. The cooling medium that flows out of each downstream flow path 212 flows into the downstream space S12.

[0061] As shown in FIGS. 6 and 7, an inlet portion 236 and an outlet portion 238 are connected to the connecting portion 230.

[0062] The inlet portion 236 communicates between the upstream space S11 inside the connecting portion main body 232 and the outside of the connecting portion main body 232. Therefore, the cooling medium flows from the outside of the connecting portion main body 232 into the upstream space S11 inside the connecting portion main body 232 through the inlet portion 236. In this embodiment, the inlet portion 236 is connected to the upper surface of the connecting portion main body 232.

[0063] The outflow portion 238 communicates between the downstream space S12 in the connecting portion main body 232 and the outside of the connecting portion main body 232. Therefore, the cooling medium flows out from the downstream space S12 of the connecting portion main body 232 to the outside of the connecting portion main body 232 through the outflow portion 238. In this embodiment, the outflow portion 238 is connected to the upper part of the connecting portion main body 232 and the partition wall 234. Note that the cooling medium flowing out of the connecting portion main body 232 through the outflow portion 238 has a higher temperature than the cooling medium flowing into the connecting portion main body 232 through the inflow portion 236.

[0064] The facing member 700 faces the upper surface of the cell casing 120. More specifically, as shown in Fig. 5, the facing member 700 faces the separation surface 124 of the cell casing 120. The facing member 700 includes a dam portion 710. The dam portion 710 prevents moisture from flowing from the separation surface 124 outward in the second direction, i.e., toward the external terminal 130.

[0065] The equipment unit 800 is disposed, for example, at an end in the first direction. In this embodiment, the equipment unit 800 is disposed on the rear part of the upper cover 320 in the longitudinal direction of the vehicle 1. As shown in Fig. 8, the equipment unit 800 has an equipment base 810, a lid 820, an equipment cover 830, a junction box 842, an electronic control unit 844, an electricity supply unit 846, and a unit cooler 848. Note that the electronic control unit 844 and the unit cooler 848 are not shown in Fig. 3.

[0066] The device base 810 is provided on the upper cover 320. The device base 810 is open upward. As shown in FIG. 8, the device base 810 has a bottom portion 812 and an upright portion 814.

[0067] The bottom portion 812 is disposed above the upper cover 320. The bottom portion 812 supports the junction box 842. The bottom portion 812 may be formed flat.

[0068] The standing portion 814 stands upright from the front end of the bottom portion 812. The standing portion 814 faces the second cross frame 24. The standing portion 814 is located behind the second cross frame 24.

[0069] 3 and 8, a base support member 391 that supports an equipment base 810 is disposed between the lower case 310 and the upper cover 320. A connector block 630 is disposed below the base support member 391.

[0070] The junction box 842 is housed in the equipment base 810. The junction box 842 is placed on the bottom 812. The junction box 842 houses a relay, a fuse, and the like.

[0071] 3 and 8 , the cooler 200 has an interposition portion 218 interposed between the upper cover 320 and the bottom portion 812 of the equipment base 810. The interposition portion 218 is configured as part of the cooling portion 210. The junction box 812 is cooled by the interposition portion 218. The interposition portion 218 is in thermal contact with the junction box 842 via the bottom portion 812 of the equipment base 810. A thermally conductive adhesive may be provided between the junction box 842 and the bottom portion 812 and / or between the bottom portion 812 and the interposition portion 218. The interposition portion 218 is in thermal contact with each of the energy storage cells 100 via the upper cover 320 and the thermally conductive adhesive 910.

[0072] The electronic control unit 844 is disposed above the junction box 842 .

[0073] The lid 820 is connected to the upper end of the equipment base 810 so as to close the opening of the equipment base 810. The lid 820 accommodates the equipment base 810, a junction box 842, and an electronic control unit 844. The lid 820 has a support portion 822, a step portion 824, and an inclined portion 826.

[0074] The support portion 822 is configured at the front portion of the lid 820. The support portion 822 is formed flat.

[0075] The step portion 824 stands upright from the rear end portion of the support portion 822. The step portion 824 is located in front of the electronic control unit 844 and faces the electronic control unit 844 in the front-rear direction (first direction).

[0076] The inclined portion 826 is inclined gradually downward from the upper end of the stepped portion 824 toward the rear. The inclined portion 826 is located above the electronic control unit 844 and faces the electronic control unit 844 in the vertical direction.

[0077] The power supply unit 846 is disposed on the lid 820. As shown in FIG.

[0078] The unit cooler 848 is disposed on the power supply unit 846. The unit cooler 848 cools the power supply unit 846.

[0079] The equipment cover 830, together with the lid 820, houses a power supply unit 846 and a unit cooler 848. The equipment cover 830 is connected to the equipment base 810.

[0080] In the energy storage device 10 described above, when gas is discharged downward from the safety valve SV due to a short circuit or the like in any of the energy storage cells 100, the gas destroys the heat insulating plate 250 and flows into the smoke exhaust path S through the through-holes h of the space forming member 350. This prevents the contents of the energy storage cells 100 (so-called debris) contained in the gas from adhering to the external terminals 130 of the energy storage cells 100, etc.

[0081] Then, the gas that has flowed into the smoke exhaust path S spreads in a first direction and is discharged from the housing 300 through the explosion-proof valve 390 as shown in Fig. 4. Here, each of the through-holes h provided at a position facing the safety valve SV of the other energy storage cells 100 different from the energy storage cell 100 that has discharged the gas is blocked by the heat insulating plate 250, and therefore the gas spreading through the smoke exhaust path S is prevented from coming into contact with the valve installation surface 121 of the other energy storage cells 100. Therefore, the energy storage cells 100 other than the energy storage cell 100 that has discharged the gas are prevented from being heated by the gas.

[0082] In addition, because the cooler 200 is provided on the top surface of the upper cover 320, even if the cooling medium leaks from the cooler 200, the cooling medium is prevented from coming into contact with the energy storage cells 100. Furthermore, because the cooler 200 constitutes part of the floor 30 of the vehicle compartment, it is possible to reduce the number of parts that constitute the floor of the vehicle compartment from the vehicle body 2.

[0083] Furthermore, since the cooler 200 has the intervening portion 218, both the energy storage cells 100 and the junction box 842 are cooled by a single cooler 200.

[0084] It will be appreciated by those skilled in the art that the exemplary embodiments described above are examples of the following aspects.

[0085] [Aspect 1] at least one storage cell; an upper cover disposed above the at least one energy storage cell; a cooler that cools the at least one power storage cell; a junction box provided above the upper cover, The cooler is in thermal contact with both the at least one power storage cell and the junction box.

[0086] In this electricity storage device, both the electricity storage cells and the junction box are cooled by a single cooler, which makes it possible to omit a cooler dedicated to cooling the junction box.

[0087] [Aspect 2] 2. The power storage device according to aspect 1, wherein the cooler is disposed above the upper cover.

[0088] In this aspect, even if the cooling medium leaks from the cooler, the cooling medium is prevented from coming into contact with the power storage cells.

[0089] [Aspect 3] an equipment base provided on the upper cover and supporting the junction box; the cooler includes an interposition portion interposed between the upper cover and the equipment base, The energy storage device according to aspect 2, wherein the interposition portion is in thermal contact with the at least one energy storage cell via the upper cover and in thermal contact with the junction box via the equipment base.

[0090] [Aspect 4] an electronic control unit disposed above the junction box; a cover that accommodates the junction box and the electronic control unit together with the equipment base; a power supply unit mounted on the lid; a unit cooler that cools the power supply unit; The power storage device according to aspect 3, further comprising: an equipment cover that, together with the lid, houses the power supply unit and the unit cooler.

[0091] [Aspect 5] a lower case that is open upward and that houses the at least one energy storage cell together with the upper cover, the lower case including a bottom surface that is located below the at least one energy storage cell; a space forming member provided between the bottom surface of the lower case and the at least one power storage cell, the space forming member forming a space together with the bottom surface of the lower case, The at least one storage cell is An electrode body; a cell case that accommodates the electrode assembly; a safety valve provided on the lower surface of the cell case, 5. The power storage device according to any one of aspects 1 to 4, wherein the space forming member has a through-hole provided below the safety valve.

[0092] In this embodiment, gas discharged downward from the safety valve of the storage cell flows through the through hole into the space formed between the bottom surface of the lower case and the space-forming member, thereby preventing the contents of the storage cell (so-called debris) contained in the gas from adhering to the storage cell.

[0093] [Aspect 6] the at least one storage cell includes a plurality of storage cells; Each of the storage cells further has an external terminal electrically connected to the electrode body, 6. The energy storage device according to aspect 5, wherein the external terminal is provided on a side surface of the cell case in a second direction perpendicular to both a first direction and a vertical direction in which the plurality of energy storage cells are arranged.

[0094] In this embodiment, the external terminals are provided on the side surfaces of the cell case, thereby reducing the height of the storage cell.

[0095] It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The scope of the present disclosure is defined by the claims rather than the description of the above embodiments, and further includes all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0096] REFERENCE SIGNS LIST 1 vehicle, 2 vehicle body, 10 energy storage device, 11 to 14 energy storage stack, 20 frame member, 21 first frame, 22 second frame, 23 first cross frame, 24 second cross frame, 51 end plate, 52 monitoring unit, 100 energy storage cell, 101 first energy storage cell, 102 second energy storage cell, 110 electrode body, 120 cell case, 121 valve installation surface, 122 terminal installation surface, 123 contact surface, 124 separation surface, 130 external terminal, 200 cooler, 210 cooling section, 211 upstream flow path, 212 downstream flow path, 218 interposition section, 220 folded section, 230 connection section, 232 connection section body, 234 partition wall, 236 inlet section, 238 outlet section, 250 heat insulating plate, 300 housing, 310 Lower case, 312 bottom surface, 314 peripheral wall, 320 upper cover, 321 top portion, 322 recess, 330 panel member, 350 space forming member, 351 base portion, 352 support portion, 353 mounting portion, 360 cross member, 362 reinforcing portion, 364 connecting bottom surface, 370 support member, 371 elastic member, 390 explosion-proof valve, 391 base support member, 630 connector block, 700 opposing member, 710 weir portion, 800 equipment unit, 810 equipment base, 812 bottom portion, 814 rising portion, 820 lid, 822 support portion, 824 step portion, 826 inclined portion, 830 equipment cover, 842 junction box, 844 electronic control unit, 846 power supply unit, 848 Unit cooler, 910 thermally conductive adhesive, 920 adhesive material, h through hole, S space (smoke exhaust route), SV safety valve.

Claims

1. at least one storage cell; an upper cover disposed above the at least one energy storage cell; a cooler that cools the at least one power storage cell; a junction box provided above the upper cover, The cooler is in thermal contact with both the at least one power storage cell and the junction box.

2. The power storage device according to claim 1 , wherein the cooler is disposed above the upper cover.

3. an equipment base provided on the upper cover and supporting the junction box; the cooler includes an interposition portion interposed between the upper cover and the equipment base, The power storage device according to claim 2 , wherein the interposition portion is in thermal contact with the at least one power storage cell via the upper cover, and is in thermal contact with the junction box via the equipment base.

4. an electronic control unit disposed above the junction box; a cover that accommodates the junction box and the electronic control unit together with the equipment base; a power supply unit mounted on the lid; a unit cooler that cools the power supply unit; The power storage device according to claim 3 , further comprising: an equipment cover that houses the power supply unit and the unit cooler together with the lid.

5. a lower case that is open upward and that houses the at least one energy storage cell together with the upper cover, the lower case including a bottom surface that is located below the at least one energy storage cell; a space forming member provided between the bottom surface of the lower case and the at least one power storage cell, the space forming member forming a space together with the bottom surface of the lower case, The at least one storage cell is An electrode body; a cell case that accommodates the electrode assembly; a safety valve provided on the lower surface of the cell case, The power storage device according to claim 1 , wherein the space forming member has a through-hole provided below the safety valve.

6. the at least one storage cell includes a plurality of storage cells; Each of the storage cells further has an external terminal electrically connected to the electrode body, The energy storage device according to claim 5 , wherein the external terminals are provided on side surfaces of the cell cases in a second direction perpendicular to both a first direction and a vertical direction in which the plurality of energy storage cells are arranged.

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