Power storage device

Abstract

To provide a power storage device capable of preventing condensation from a cooler from dripping onto the electrode terminals of the storage cells.SOLUTION: A power storage device 100 includes: an energy storage module 10 including energy storage cells 11; a cooler 30 placed above the energy storage module 10; and a heat-insulating material 40. The energy storage cell 11 has a short side 11a and a short side 11b, a positive electrode terminal 12 that is placed on the short side 11a, and a negative terminal 13 that is placed on the short side 11b. The heat insulating material 40 is placed below the cooler 30 and above each of the positive electrode terminal 12 and the negative terminal 13.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] JP 2023-529400 A (Patent Document 1) discloses a battery pack including a plurality of cells, a tray, a temperature equalizer plate, and cooling ducts. The cells are housed in a storage space of the tray. The temperature equalizer plate covers an upper opening of the storage space of the tray. The cooling ducts are arranged on the outer surface of the temperature equalizer plate (the surface opposite the storage space). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2023-529400 Summary of the Invention [Problem to be solved by the invention]

[0004] Although not described in Patent Document 1, an electrode terminal may be provided on the side of the energy storage cell. In this case, it is conceivable that condensation water generated on the temperature equalizing plate (cooler) drips and adheres to the electrode terminal.

[0005] The present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide an energy storage device that can prevent condensation water from a cooler from dripping onto electrode terminals provided on energy storage cells. [Means for solving the problem]

[0006] A first aspect of the present disclosure provides an energy storage device including an energy storage module including at least one energy storage cell, a cooler disposed above the energy storage module, and an arrangement member disposed below the cooler. The arrangement member is a heat insulating member. The at least one energy storage cell has an upper surface, a lower surface, a side surface disposed between the upper surface and the lower surface, and an electrode terminal disposed on the side surface. The heat insulating member is disposed below the cooler and above the electrode terminal.

[0007] In the electricity storage device according to the first aspect of the present disclosure, as described above, the heat insulating member is provided below the cooler and above the electrode terminals, and thus the heat insulating member is provided between the cooler and the electrode terminals, and can prevent condensation water from the cooler from dripping onto the electrode terminals.

[0008] Furthermore, the heat insulating member can prevent the electrode terminals from being excessively cooled by the cooler.

[0009] A second aspect of the present disclosure provides an energy storage device including an energy storage module including at least one energy storage cell, a cooler disposed above the energy storage module, and an arrangement member disposed below the cooler. The arrangement member is a filling member. The at least one energy storage cell has an upper surface, a lower surface, a side surface disposed between the upper surface and the lower surface, and an electrode terminal disposed on the side surface. The filling member fills the space below the cooler and above the electrode terminal. Note that "the filling member fills the space" means "the filling member completely fills the space."

[0010] In the electricity storage device according to the second aspect of the present disclosure, as described above, the filling member is provided below the cooler and above the electrode terminals, thereby providing a shield between the cooler and the electrode terminals, thereby preventing condensation from the cooler from dripping onto the electrode terminals.

[0011] Furthermore, since the space above the electrode terminal is filled with the filler, the amount of air present in the space can be minimized, thereby minimizing the amount of condensed water that may be caused by the air condensing and adhering to the electrode terminal.

[0012] The filling member may include a thermally conductive member. With this configuration, the electrode terminals can be effectively cooled by the cooler through the thermally conductive member.

[0013] The at least one energy storage cell may include a first energy storage cell and a second energy storage cell arranged adjacent to each other. The cooler may be arranged above the energy storage module, straddling the first energy storage cell and the second energy storage cell. The electrode terminal may include a first electrode terminal provided on a side surface of the first energy storage cell facing the second energy storage cell, and a second electrode terminal provided on a side surface of the second energy storage cell facing the first energy storage cell. The arranging member is provided above each of the first electrode terminal and the second electrode terminal. With this configuration, the arranging member is arranged so as to block the first electrode terminal and the second electrode terminal from the cooler. As a result, condensation water on the cooler can be prevented from dripping onto the first electrode terminal and the second electrode terminal.

[0014] At least one of the storage cells may be provided with an exhaust valve located below the electrode terminals. This configuration can prevent the placement member from interfering with the flow of gas (smoke) exhausted from the exhaust valve (and the exhaust of gas from the exhaust valve), compared to when the exhaust valve is located above the electrode terminals (toward the placement member).

[0015] The at least one energy storage cell may include a plurality of energy storage cells arranged in the arrangement direction. The arranging member extends in the arrangement direction so as to straddle the plurality of energy storage cells arranged in the arrangement direction. With this configuration, the arranging member is provided so as to cover the electrode terminals of each energy storage cell from above, thereby preventing condensation water from dripping onto each electrode terminal. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to prevent condensation water from the cooler from dripping onto the electrode terminals provided on the power storage cells. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a diagram showing a vehicle on which an electricity storage device according to a first embodiment is mounted. [Figure 2] 1 is an exploded perspective view showing the configuration of an electricity storage device according to a first embodiment. [Figure 3] FIG. 2 is a perspective view showing the configuration of a storage cell. [Figure 4] 3 is a cross-sectional view taken along the Y direction of the electricity storage device according to the first embodiment. FIG. [Figure 5] 1 is a first diagram showing a cross section of the electricity storage device according to the first embodiment taken along the X direction. FIG. [Figure 6] FIG. 2 is a second diagram showing a cross section of the electricity storage device according to the first embodiment taken along the X direction. [Figure 7] FIG. 1 is a first diagram showing a cross section of a power storage device according to a second embodiment taken along the X direction. [Figure 8] FIG. 2 is a second diagram showing a cross section of the electricity storage device according to the second embodiment taken along the X direction. [Figure 9] 10 is a cross-sectional view taken along the Y direction of the electricity storage device according to the second embodiment. FIG. [Figure 10] 10 is a cross-sectional view taken along the X direction of the power storage device according to a modified example of the first embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference numerals, and description thereof will not be repeated.

[0019] Hereinafter, embodiments and modifications 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. Note that the embodiments and modifications described below may be selectively combined as appropriate.

[0020] [First embodiment] An electricity storage device 100 according to the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a side view that schematically shows a vehicle 200 that includes the electricity storage device 100 according to the first embodiment. In this specification, the X direction, Y direction, and Z direction are directions that are perpendicular to one another. For example, the X direction and Y direction are the front-rear direction and the vehicle width direction of the vehicle 200 when the electricity storage device 100 is mounted on the vehicle 200, respectively. The Z direction is the up-down (vertical) direction. The Y direction is an example of an "arrangement direction" in the present disclosure.

[0021] 1, power storage device 100 is a device for storing electric power for driving vehicle 200, for example. Power storage device 100 is arranged in an underbody 210 (floor panel) of vehicle 200. Examples of vehicle 200 include a hybrid vehicle, a plug-in hybrid vehicle, a fuel cell vehicle, and an electric vehicle. Note that power storage device 100 may also be provided in an electric device other than a vehicle (for example, a stationary power storage device).

[0022] 2 is an exploded perspective view showing the configuration of the energy storage device 100 according to the first embodiment. The energy storage device 100 includes an energy storage module 10, a case 20, a cooler 30, a heat insulating member 40, and a thermally conductive material 50.

[0023] The energy storage module 10 includes a cell unit 10a and a cell unit 10b. Each of the cell units 10a and 10b includes a plurality of energy storage cells 11 (FIG. 3). The cell unit 10a and the cell unit 10b are arranged adjacent to each other in the X direction. The cell unit 10a is arranged on the X1 side (e.g., the front of the vehicle) of the cell unit 10b. A space S1 is formed between the cell unit 10a and the cell unit 10b. The number of cell units may be three or more. The energy storage cell 11 of the cell unit 10a is an example of a "first energy storage cell" in the present disclosure. The energy storage cell 11 of the cell unit 10b is an example of a "second energy storage cell" in the present disclosure.

[0024] The case 20 houses the power storage module 10. The case 20 includes an upper case 21 and a lower case 22. The power storage module 10 is housed in a space formed by assembling the upper case 21 to the lower case 22. The cooler 30 is also housed in the case 20.

[0025] The cooler 30 is disposed above (on the Z1 side of) the power storage module 10. The cooler 30 is disposed across the cell unit 10a and the cell unit 10b. The cooler 30 is provided so as to cover the cell unit 10a, the cell unit 10b, and the space S1 from the Z1 side. The cooler 30 has a plate shape formed to extend along the XY plane.

[0026] The heat insulating member 40 is disposed below the cooler 30. Specifically, the heat insulating member 40 is attached to the lower surface 31 of the cooler 30 with an adhesive or the like. The heat insulating member 40 is disposed in the space S1 when the cooler 30 is placed on the power storage module 10. Examples of the heat insulating member 40 include foam plastic heat insulating materials such as extruded polystyrene foam, fiber heat insulating materials such as cellulose fiber, glass wool, and natural material heat insulating materials such as carbonized cork. The heat insulating member 40 has a lower thermal conductivity than the heat conducting material 50, for example. The heat insulating member 40 may have a lower thermal conductivity than the metals (iron, aluminum, etc.) that form the case 20, the cooler 30, etc.

[0027] The thermally conductive material 50 is applied to the upper surface 11e (FIG. 3) of each of the multiple energy storage cells 11 (FIG. 3). As a result, the thermally conductive material 50 is provided so as to cover each of the cell units 10a and 10b from above. In other words, the thermally conductive material 50 arranged on the cell unit 10a and the thermally conductive material 50 arranged on the cell unit 10b are provided separately from each other. The thermally conductive material 50 is sandwiched between the cooler 30 and each of the cell units 10a and 10b. The thermally conductive material 50 is formed, for example, from a thermally conductive adhesive material.

[0028] 3 is a perspective view showing the configuration of the energy storage cell 11. The energy storage cell 11 has a short side surface 11a, a short side surface 11b, a long side surface 11c, a long side surface 11d, an upper surface 11e, and a lower surface 11f.

[0029] The short side surfaces 11a and 11b are arranged in the X direction. Specifically, the short side surfaces 11a and 11b are one end surface and the other end surface of the power storage cell 11 in the X direction, respectively.

[0030] The long side surfaces 11c and 11d are arranged in the Y direction. Specifically, the long side surfaces 11c and 11d are one end surface and the other end surface of the power storage cell 11 in the Y direction, respectively.

[0031] The upper surface 11e and the lower surface 11f are arranged in the Z direction. Specifically, the upper surface 11e and the lower surface 11f are the end surface on the Z1 side and the end surface on the Z2 side of the power storage cell 11, respectively.

[0032] Each of the short side surface 11a, the short side surface 11b, the long side surface 11c, and the long side surface 11d is disposed between the upper surface 11e and the lower surface 11f, and connects the upper surface 11e and the lower surface 11f.

[0033] The energy storage cell 11 is formed to be elongated in the X direction. Specifically, the width W1 of the energy storage cell 11 in the X direction is larger than the width W2 of the energy storage cell 11 in the Y direction. Furthermore, the width W1 is larger than the height H of the energy storage cell 11 in the Z direction. Furthermore, the height H is larger than the width W2.

[0034] The energy storage cell 11 further has a positive electrode terminal 12 and a negative electrode terminal 13. The positive electrode terminal 12 is provided on the short side surface 11a. The negative electrode terminal 13 is provided on the short side surface 11b. The positive electrode terminal 12 is provided to protrude in the X direction from the short side surface 11a. The negative electrode terminal 13 is provided to protrude in the X direction from the short side surface 11b. Each of the positive electrode terminal 12 and the negative electrode terminal 13 is an example of an "electrode terminal" in the present disclosure.

[0035] The energy storage cell 11 further includes a cell exhaust valve 14 that exhausts gas inside the energy storage cell 11. The cell exhaust valve 14 is configured to exhaust gas (smoke) inside the energy storage cell 11 to the outside of the energy storage cell 11 when the internal pressure of the energy storage cell 11 increases. The cell exhaust valve 14 is provided on the short side surface 11b of the energy storage cell 11. The cell exhaust valve 14 is an example of an "exhaust section" in the present disclosure.

[0036] The cell exhaust valve 14 is provided below the negative electrode terminal 13. Specifically, the cell exhaust valve 14 is located near the bottom surface 11f of the power storage cell 11. The negative electrode terminal 13 is located below the positive electrode terminal 12. In other words, the cell exhaust valve 14 is located below the positive electrode terminal 12.

[0037] 4 is a side view of the cell unit 10a seen from the X2 side, and is also a cross-sectional view formed when cutting the space S1 along the Y direction. The energy storage device 100 further includes an adhesive 60 and a plurality of bus bars 70. The configuration of the cell unit 10b is the same as that of FIG.

[0038] As shown in Figure 4, storage cells 11 arranged so that their short sides 11a face the X2 side (the space S1 side, the front side of the paper) and storage cells 11 arranged so that their short sides 11b face the X2 side are arranged alternately in the Y direction.

[0039] As a result, the positive electrode terminals 12 and negative electrode terminals 13 of the energy storage cells 11 adjacent to each other in the Y direction are arranged adjacent to each other. The bus bar 70 connects the positive electrode terminals 12 and negative electrode terminals 13 adjacent to each other in the Y direction. In addition, a plurality of cell exhaust valves 14 are arranged in the Y direction. Although not shown in the figure, the plurality of cell exhaust valves 14 are also arranged in the Y direction on the X1 side (the back side of the paper).

[0040] The adhesive 60 is provided between the energy storage module 10 and the lower case 22. The adhesive 60 bonds the lower surface 11f of each of the plurality of energy storage cells 11 to the lower case 22. In this way, each of the plurality of energy storage cells 11 is fixed to the lower case 22.

[0041] In a conventional electricity storage device, condensed water generated in the cooler may drip and adhere to the electrode terminals.

[0042] Therefore, in this embodiment, the heat insulating member 40 is provided below the cooler 30 and above each of the positive electrode terminal 12 and the negative electrode terminal 13. The heat insulating member 40 is provided at a position overlapping each of the positive electrode terminal 12 and the negative electrode terminal 13 in the Z direction. Specifically, when viewing the heat insulating member 40 from point P, which is away from each of the positive electrode terminal 12 and the negative electrode terminal 13 and the heat insulating member 40 on the Z1 side, each of the positive electrode terminal 12 and the negative electrode terminal 13 is covered by the heat insulating member 40 and is not exposed. The heat insulating member 40 is an example of an "arrangement member" in the present disclosure.

[0043] The heat insulating member 40 is in contact with the cooler 30 and is spaced apart from each of the positive electrode terminal 12 and the negative electrode terminal 13 .

[0044] The heat insulating member 40 extends in the Y direction so as to straddle the multiple storage cells 11 arranged in the Y direction. As a result, the heat insulating member 40 is provided so as to extend in the Y direction along each of the cell units 10a and 10b, making it possible to increase the rigidity of each of the cell units 10a and 10b. Specifically, the heat insulating member 40 extends from the Y1-side end to the Y2-side end of each of the cell units 10a and 10b.

[0045] The heat insulating member 40 has a thickness t1 in the Z direction. The thickness t1 is greater than, for example, a thickness t2 of the cooler 30 in the Z direction. This ensures the heat insulating properties of the heat insulating member 40 compared to when the thickness t1 is equal to or less than the thickness t2. This makes it possible to suppress the formation of condensation water caused by the cooling of moisture in the air in the space S1. Furthermore, since the thickness t1 of the heat insulating member 40 is relatively large, it is possible to increase the amount of water droplets that drip from the cooler 30 that are absorbed by the heat insulating member 40.

[0046] FIG. 5 is a cross-sectional view at a position where the short side surfaces 11a face each other. In FIG. 5, the storage cells 11 of each of the cell units 10a and 10b are arranged so that the short side surface 11a faces the space S1. The short side surface 11a facing the space S1 is an example of a "side surface" in the present disclosure. The positive electrode terminal 12 provided on the short side surface 11a facing the space S1 is an example of an "electrode terminal" in the present disclosure. The positive electrode terminal 12 provided on the short side surface 11a of the storage cells 11 of the cell unit 10a facing the space S1 (cell unit 10b) is an example of a "first electrode terminal" in the present disclosure. The positive electrode terminal 12 provided on the short side surface 11a of the storage cells 11 of the cell unit 10b facing the space S1 (cell unit 10a) is an example of a "second electrode terminal" in the present disclosure.

[0047] 5, the heat insulating member 40 is provided above the positive electrode terminal 12 on the cell unit 10a side and the positive electrode terminal 12 on the cell unit 10b side. Specifically, the heat insulating member 40 extends in the X direction so as to straddle the positive electrode terminal 12 on the cell unit 10a side and the positive electrode terminal 12 on the cell unit 10b side.

[0048] 5, the heat insulating member 40 is in close contact with each of the short side surfaces 11a of the storage cells 11 on the cell unit 10a side and the short side surfaces 11a of the storage cells 11 on the cell unit 10b side. This makes it possible to prevent gaps from being formed between the short side surfaces 11a and the heat insulating member 40. The heat insulating member 40 is sandwiched between the storage cells 11 adjacent to each other in the X direction. The heat insulating member 40 may be an elastic body.

[0049] FIG. 6 is a cross-sectional view at a position where the short side surfaces 11b face each other (for example, at a position where the storage cell 11 adjacent in the Y direction to the storage cell 11 shown in FIG. 5 is provided). In FIG. 6, the storage cells 11 of each of the cell units 10a and 10b are arranged so that the short side surface 11b faces the space S1 side. The short side surface 11b facing the space S1 side is an example of a "side surface" in the present disclosure. The negative electrode terminal 13 provided on the short side surface 11b facing the space S1 side is an example of an "electrode terminal" in the present disclosure. The negative electrode terminal 13 provided on the short side surface 11b of the storage cell 11 of the cell unit 10a facing the space S1 side (cell unit 10b side) is an example of a "first electrode terminal" in the present disclosure. Furthermore, the negative electrode terminal 13 provided on the short side surface 11b of the storage cell 11 of the cell unit 10b facing the space S1 side (cell unit 10a side) is an example of the "second electrode terminal" of the present disclosure.

[0050] In FIG. 6, the heat insulating member 40 extends in the X direction so as to straddle the negative electrode terminal 13 on the cell unit 10a side and the negative electrode terminal 13 on the cell unit 10b side.

[0051] In FIG. 6, the heat insulating member 40 is in close contact with both the short side surface 11b of the storage cell 11 on the cell unit 10a side and the short side surface 11b of the storage cell 11 on the cell unit 10b side.

[0052] The arrangement of the storage cells 11 is not limited to the examples shown in Figures 5 and 6. The short side surfaces 11a and 11b may face each other in the X direction.

[0053] As described above, in the first embodiment, the heat insulating member 40 is provided below the cooler 30 and above each of the positive electrode terminal 12 and the negative electrode terminal 13. As a result, the heat insulating member 40 is provided so as to isolate (separate) the cooler 30 from each of the positive electrode terminal 12 and the negative electrode terminal 13, and therefore, condensation water on the cooler 30 can be prevented from dripping onto each of the positive electrode terminal 12 and the negative electrode terminal 13.

[0054] Furthermore, the heat insulating member 40 can prevent the air above the electrode terminals (12, 13) from being cooled by the cooler 30, thereby preventing condensation from forming in the air.

[0055] Furthermore, the heat insulating member 40 is provided above the electrode terminals (12, 13) of each of the cell units 10a and 10b that protrude into the space S1. This makes it possible to easily prevent condensation water from adhering to the electrode terminals (12, 13) that are arranged in the space S1 in a configuration in which the cooler 30 is arranged to straddle the cell units 10a and 10b.

[0056] [Second embodiment] A second embodiment of the present disclosure will be described with reference to Figures 7 to 9. In the second embodiment, a thermally conductive member 140 is used instead of the heat insulating member 40 of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and will not be described repeatedly.

[0057] As shown in FIG. 7 , the power storage device 300 of the second embodiment includes a thermally conductive member 140. The thermally conductive member 140 may be made of the same material as the thermally conductive material 50, or may be made of a different material from the thermally conductive material 50. The thermally conductive member 140 has a higher thermal conductivity than, for example, metals (iron, aluminum, etc.) that form the case 20, the cooler 30, etc. The thermally conductive member 140 is made of, for example, a gel-like thermally conductive material. The thermally conductive member 140 is an example of the "placement member" and "filler member" of the present disclosure.

[0058] The thermally conductive member 140 is provided above the positive electrode terminal 12 on the cell unit 10a side and the positive electrode terminal 12 on the cell unit 10b side. Specifically, the thermally conductive member 140 fills the space S2 above the positive electrode terminal 12 in the space S1. In other words, the space S2 is completely filled with the thermally conductive member 140. Therefore, the thermally conductive member 140 is in contact with the positive electrode terminal 12 and short side surface 11a on the cell unit 10a side, the positive electrode terminal 12 and short side surface 11a on the cell unit 10b side, and the underside 31 of the cooler 30.

[0059] The thermally conductive member 140 is formed to extend in the Z direction. Specifically, the thermally conductive member 140 extends from the lower surface 31 of the cooler 30 to below the positive electrode terminal 12.

[0060] 8, the thermally conductive member 140 is provided above the negative electrode terminal 13 on the cell unit 10a side and the negative electrode terminal 13 on the cell unit 10b side. Specifically, the thermally conductive member 140 fills the space S3 above the negative electrode terminal 13 in the space S1. In other words, the space S3 is completely filled with the thermally conductive member 140. Therefore, the thermally conductive member 140 is in contact with the negative electrode terminal 13 and short side surface 11b on the cell unit 10a side, the negative electrode terminal 13 and short side surface 11a on the cell unit 10b side, and the underside 31 of the cooler 30.

[0061] The thermally conductive member 140 extends from the lower surface 31 of the cooler 30 to the lower end 13a of the negative electrode terminal 13. The lower end 141 of the thermally conductive member 140 is located above the cell exhaust valve 14. The lower end 141 of the thermally conductive member 140 may be located above or below the lower end 13a of the negative electrode terminal 13. The position in the Z direction of the lower end 141 of the thermally conductive member 140 may differ depending on the position in the Y direction (for example, depending on the position of the short side surface 11a and the position of the short side surface 11b).

[0062] As shown in FIG. 9, the thermally conductive member 140 is formed to extend in the Y direction so as to straddle the power storage cells 11 arranged in the Y direction.

[0063] The other configurations are the same as those in the first embodiment, and therefore will not be described repeatedly.

[0064] As described above, in the second embodiment, the thermally conductive member 140 fills the spaces (S2, S3) above the electrode terminals (12, 13). This allows the thermally conductive member 140 to efficiently exchange heat between the cooler 30 and the electrode terminals (12, 13).

[0065] Furthermore, since the spaces (S2, S3) are filled with the thermally conductive member 140, it is possible to prevent condensation of air in the spaces (S2, S3). As a result, it is possible to further prevent condensation water from adhering to the electrode terminals (12, 13).

[0066] [Variations] In the first embodiment, an example has been described in which the heat insulating member 40 is fixed to the cooler 30, but the present disclosure is not limited to this. The heat insulating member 40 may be fixed to, for example, the short side surfaces (11a, 11b).

[0067] In the first embodiment, an example in which the heat insulating member 40 is provided is shown, but the present disclosure is not limited to this. For example, a heat insulating filler (e.g., a gel-like heat insulating material) may be filled in the space between the cooler 30 and the electrode terminals (12, 13). In this case, the heat insulating material is an example of the "filler" of the present disclosure.

[0068] In the second embodiment, an example in which the gel-like thermally conductive member 140 is filled has been described, but the present disclosure is not limited to this. For example, a sheet-like or block-like thermally conductive member may be disposed in the space between the cooler 30 and the electrode terminals (12, 13).

[0069] In the first embodiment, an example in which the heat insulating member 40 is provided between the electrode terminals (12, 13) on the space S1 side and the cooler 30 has been described, but the present disclosure is not limited to this. The position of the heat insulating member is not limited to the space S1.

[0070] For example, as shown in FIG. 10 , a heat insulating member 41 may be provided below a protrusion 131 on the X1 side of the cooler 130. In the example shown in FIG. 10 , the heat insulating member 41 is disposed above an electrode terminal (negative electrode terminal 13 in FIG. 10 ) provided on the opposite side of the space S1 in the cell unit 10a. In addition, a heat insulating member 42 may be provided below a protrusion 132 on the X2 side of the cooler 130. In the example shown in FIG. 10 , the heat insulating member 42 is disposed above an electrode terminal (negative electrode terminal 13 in FIG. 10 ) provided on the opposite side of the space S1 in the cell unit 10b. The protrusion 131 protrudes from the cell unit 10a toward the X1 side. The protrusion 132 protrudes from the cell unit 10b toward the X2 side. This modification may also be applied to the second embodiment. Each of the heat insulating members 41 and 42 is an example of an “arrangement member” in the present disclosure.

[0071] In the first and second embodiments, examples have been shown in which the storage cells 11 (cell units) are arranged in the X direction, but the present disclosure is not limited to this. The storage cells 11 (cell units) do not have to be arranged in the X direction.

[0072] In the first and second embodiments, an example has been shown in which the plurality of energy storage cells 11 are arranged in the Y direction (vehicle width direction), but the present disclosure is not limited to this. The plurality of energy storage cells 11 may also be arranged in the X direction (vehicle front-rear direction).

[0073] In the first and second embodiments described above, an example was shown in which the cell exhaust valve 14 was provided on the short side surface 11b of the energy storage cell 11, but the present disclosure is not limited to this. For example, the cell exhaust valve may be provided on the short side surface 11a or the bottom surface 11f of the energy storage cell 11.

[0074] In the first and second embodiments, the positive electrode terminal 12 and the negative electrode terminal 13 are provided on the short side surface 11a and the short side surface 11b, respectively. However, the present disclosure is not limited to this. The positive electrode terminal 12 and the negative electrode terminal 13 may be provided on either the short side surface 11a or the short side surface 11b.

[0075] In the first and second embodiments, the positive electrode terminal 12 and the negative electrode terminal 13 are disposed at different heights in the Z direction, but the present disclosure is not limited to this. The positive electrode terminal 12 and the negative electrode terminal 13 may be disposed at the same height in the Z direction.

[0076] In the first and second embodiments described above, examples have been shown in which the cell exhaust valves 14 are positioned below the positive electrode terminal 12 and the negative electrode terminal 13, but the present disclosure is not limited to this. For example, as long as all of the cell exhaust valves 14 are provided on the short side surfaces (11a, 11b) opposite the space S1, the cell exhaust valves 14 may be positioned at the same position in the Z direction as the positive electrode terminal 12 or the negative electrode terminal 13 or higher.

[0077] In the first embodiment described above, an example was shown in which the heat insulating member 40 extends in the Y direction so as to straddle the electrode terminals (12, 13) on the cell unit 10a side and the electrode terminals (12, 13) on the cell unit 10b side, but the present disclosure is not limited to this. The heat insulating member provided above the electrode terminals (12, 13) on the cell unit 10a side and the heat insulating member provided above the electrode terminals (12, 13) on the cell unit 10b side may be provided separately. This modified example may also be applied to the second embodiment described above.

[0078] In the first embodiment, an example has been shown in which the heat insulating member 40 extends in the Y direction so as to straddle the plurality of energy storage cells 11 arranged in the X direction, but the present disclosure is not limited to this. A plurality of heat insulating members provided for each energy storage cell 11 may be arranged in the Y direction. This modification may also be applied to the second embodiment.

[0079] The configurations (processing) of the above-described embodiment and the above-described modifications may be combined with each other.

[0080] 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 description of the above embodiments, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0081] 10 Energy storage module, 11 Energy storage cell, 11a Short side, 11b Short side, 11e Top surface, 11f Bottom surface, 12 Positive electrode terminal (electrode terminal), 13 Negative electrode terminal (electrode terminal), 14 Cell exhaust valve (exhaust valve), 30, 130 Cooler, 40, 41, 42 Heat insulating member (positioning member), 100, 300 Energy storage device, 140 Thermally conductive member (filling member) (positioning member).

Claims

1. a storage module including at least one storage cell; a cooler disposed above the power storage module; a placement member disposed below the cooler, the placement member is a heat insulating member, The at least one storage cell is The top surface and The underside and a side surface disposed between the upper surface and the lower surface; an electrode terminal disposed on the side surface, The heat insulating member is provided below the cooler and above the electrode terminals.

2. a storage module including at least one storage cell; a cooler disposed above the power storage module; a placement member disposed below the cooler, the placement member is a filling member, The at least one storage cell is The top surface and The underside and a side surface disposed between the upper surface and the lower surface; an electrode terminal disposed on the side surface, The filling member fills a space below the cooler and above the electrode terminals.

3. The power storage device according to claim 2 , wherein the filling member includes a thermally conductive member.

4. the at least one storage cell includes a first storage cell and a second storage cell arranged adjacent to each other; the cooler is disposed above the power storage module and straddles the first power storage cell and the second power storage cell, The electrode terminal is a first electrode terminal provided on the side surface of the first storage cell that faces the second storage cell; a second electrode terminal provided on the side surface of the second storage cell that faces the first storage cell, 4. The power storage device according to claim 1, wherein the arrangement member is provided above each of the first electrode terminal and the second electrode terminal.

5. 4. The power storage device according to claim 1, wherein the at least one power storage cell is provided with an exhaust valve located below the electrode terminal.

6. the at least one storage cell includes a plurality of storage cells arranged in an arrangement direction, 4. The power storage device according to claim 1, wherein the arranging member extends in the arrangement direction so as to straddle the plurality of power storage cells arranged in the arrangement direction.

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