Power storage device and vehicle mounting structure of the same

Abstract

To realize a power storage device which contributes to improvement of maintainability of the interior of the power storage device.SOLUTION: A power storage device (1) according to the disclosure includes: a battery module (2) including a plurality of battery cells (11); a case (3) which houses at least a part of the battery module (2); a device component located between the battery module (2) and the case (3); and an adhesive member which bonds the device component and the battery module (2) to each other. The power storage device has a wire (7) including a first portion disposed inside the power storage device (1) and a second portion disposed outside the power storage device (1).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to an electricity storage device and a vehicle mounting structure for the electricity storage device. [Background technology]

[0002] For example, the power storage device in Patent Document 1 has a case formed by left and right rockers, a front cross member, a rear cross member, a floor pan, and a bottom, and the battery module is housed in a small space inside the case partitioned by a center tunnel and an intermediate cross member.In this case, the power storage device in Patent Document 1 has a configuration in which the floor pan also serves as the floor panel of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-202946 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, in a power storage device such as that described in Patent Document 1, if a surface pressure distribution member is placed between the battery cell and the upper case to distribute the input to the battery cell from above and fixed with an adhesive member, the maintenance of the inside of the power storage device becomes difficult.

[0005] The present disclosure has been made in consideration of such problems, and provides an electricity storage device and a vehicle mounting structure for the electricity storage device that contribute to improving the ease of maintenance of the interior of the electricity storage device. [Means for solving the problem]

[0006] A power storage device according to one embodiment of the present disclosure includes: a battery module including a plurality of battery cells; a case that accommodates at least a portion of the battery module; a device component positioned between the battery module and the case; an adhesive member that bonds the device component and the battery module; A power storage device comprising: The wire includes a first portion disposed inside the power storage device and a second portion disposed outside the power storage device.

[0007] In the above-described electricity storage device, the wire preferably has insulating properties.

[0008] In the above-described electricity storage device, it is preferable that the first portion of the wire includes a portion that is arranged at a position that overlaps the battery module when viewed from the direction in which the battery module and the device component face each other.

[0009] In the above-described electricity storage device, it is preferable that the first portion of the wire includes a portion that is fixed at a position that overlaps the battery module when viewed from the direction in which the battery module and the device component face each other.

[0010] In the above-described power storage device, it is preferable that the first portion of the wire includes a portion that contacts the adhesive member.

[0011] In the above-described electricity storage device, the first portion of the wire is preferably curved when viewed from the direction in which the battery module and the device component face each other.

[0012] In the above-described electricity storage device, it is preferable that the wire is disposed inside the adhesive member.

[0013] In the above-described power storage device, the device component is a surface pressure dispersion member, the adhesive members include a first adhesive member that joins the surface pressure distribution member and the case, and a second adhesive member that joins the surface pressure distribution member and the battery module, The wire is preferably disposed inside the first adhesive member.

[0014] The above-described power storage device preferably includes a load receiving member disposed between adjacent battery cells and to which a load is transmitted from the surface pressure distribution member.

[0015] In the above-described electric storage device, it is preferable that the surface pressure distribution member includes a rib that protrudes so as to be disposed between adjacent battery cells and presses against the load-receiving member.

[0016] In the above-described electricity storage device, the load-receiving member preferably has insulating properties.

[0017] In the above-described power storage device, the battery cells preferably have electrode terminals on at least one of a pair of surfaces that face each other in a direction perpendicular to the direction in which the battery module and the device component face each other.

[0018] In the above-described power storage device, the device component preferably forms at least a part of the case.

[0019] The vehicle mounting structure for the above-mentioned power storage device, a first vehicle frame member disposed above the battery module and extending in a vehicle width direction; a second vehicle frame member disposed above the battery module and spaced apart from the first vehicle frame member in the front-to-rear direction of the vehicle, and extending in a vehicle width direction of the vehicle; Equipped with The device component is a surface pressure dispersion member, The surface pressure distribution member is disposed between the first vehicle frame member and the second vehicle frame member.

[0020] In the above-described vehicle mounting structure for an electric storage device, the first vehicle frame member and the second vehicle frame member are preferably seat cloths.

[0021] A power storage device according to one embodiment of the present disclosure includes: a battery module including a plurality of battery cells; a case that accommodates at least a portion of the battery module; an adhesive member that bonds the case and the battery module; A power storage device comprising: The wire includes a first portion that is positioned so as to overlap the battery module when viewed from the direction in which the battery module and the case face each other, and a second portion that is positioned so as not to overlap the battery module when viewed from the direction in which the battery module and the case face each other.

[0022] In the above-described power storage device, the battery cells preferably have electrode terminals on at least one of a pair of surfaces that face each other in a direction perpendicular to the direction in which the battery module and the case face each other. [Effects of the Invention]

[0023] According to the present disclosure, it is possible to realize an electricity storage device and a vehicle mounting structure for the electricity storage device that contribute to improving the ease of maintenance of the interior of the electricity storage device. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a diagram showing a state in which the electricity storage device of the first embodiment is mounted on a vehicle. [Figure 2] 1 is an exploded view showing a simplified view of an electricity storage device according to a first embodiment. [Figure 3] 3 is a diagram illustrating the arrangement of surface pressure distribution members, adhesive members, wire rods, and the like in the electricity storage device of the first embodiment. FIG. [Figure 4] 2 is a partial YZ cross-sectional view of the electricity storage device according to the first embodiment. FIG. [Figure 5] 4 is a YZ cross-sectional view for explaining the arrangement of adhesive members, surface pressure distribution members, and battery cells in the electricity storage device of the first embodiment. FIG. [Figure 6] 2 is an XZ cross-sectional view of the electricity storage device according to the first embodiment. FIG. [Figure 7] 4 is an XZ cross-sectional view for explaining the arrangement of surface pressure dispersion members, adhesive members, and battery cells in the electricity storage device of the first embodiment. FIG. [Figure 8] 4 is an XZ cross-sectional view showing an example of a surface pressure distribution member in the electricity storage device according to the first embodiment. FIG. [Figure 9] 4 is an XZ cross-sectional view showing an example of a surface pressure distribution member in the electricity storage device according to the first embodiment. FIG. [Figure 10] 10 is an XZ cross-sectional view illustrating a vehicle mounting structure for an electricity storage device according to a second embodiment. FIG. [Figure 11] FIG. 10 is a perspective view illustrating the arrangement of a surface pressure distribution member in an electricity storage device according to a second embodiment. [Figure 12] 12 is a YZ cross-sectional view taken along the line XII-XII in FIG. 10. [Figure 13] 13 is a YZ cross-sectional view taken along the line XIII-XIII in FIG. 10. [Figure 14] 10 is a diagram illustrating the configuration between adjacent battery cells in the X-axis direction in the power storage device of the third embodiment. FIG. [Figure 15] 10 is a YZ cross-sectional view illustrating the arrangement of adhesive members, a cooling device, a battery module, and the like in the electricity storage device of the fourth embodiment. FIG. [Figure 16] 10 is a YZ cross-sectional view illustrating the arrangement of adhesive members, device components, battery modules, etc. in the electricity storage device of the fifth embodiment. FIG. [Figure 17] FIG. 10 is an XZ cross-sectional view showing an example of a surface pressure distribution member in an electricity storage device according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0025] Specific embodiments to which the present disclosure is applied will be described in detail below with reference to the drawings. However, the present disclosure is not limited to the following embodiments. For clarity of explanation, the following description and drawings have been simplified as appropriate. For clarity of explanation, the following description will be made using a three-dimensional (XYZ) coordinate system.

[0026] <First Embodiment> First, the configuration of the power storage device of this embodiment will be described. Fig. 1 is a diagram showing a state in which the power storage device of this embodiment is mounted on a vehicle. The power storage device 1 is suitable as a power storage device mounted on a vehicle 100, for example, as shown in Fig. 1.

[0027] Here, the positive side of the X axis is the front side of the vehicle 100, and the negative side of the X axis is the rear side of the vehicle 100. The positive side of the Y axis is the left side of the vehicle 100, and the negative side of the Y axis is the right side of the vehicle 100. The positive side of the Z axis is the top side of the vehicle 100, and the negative side of the Z axis is the bottom side of the vehicle 100.

[0028] Fig. 2 is an exploded view showing a simplified version of the electricity storage device of the present embodiment. Fig. 3 is a diagram for explaining the arrangement of surface pressure dispersion members, adhesive members, wire rods, etc. in the electricity storage device of the present embodiment. Fig. 4 is a partial YZ cross-sectional view of the electricity storage device of the present embodiment.

[0029] Fig. 5 is a YZ cross-sectional view for explaining the arrangement of adhesive members, surface pressure distribution members, and battery modules in the electricity storage device of the present embodiment. Fig. 6 is an XZ cross-sectional view of the electricity storage device of the present embodiment. Fig. 7 is an XZ cross-sectional view for explaining the arrangement of surface pressure distribution members, adhesive members, and battery cells in the electricity storage device of the present embodiment.

[0030] 2 to 7, the energy storage device 1 includes a battery module 2, a pack case 3, a surface pressure distribution member 4, a first adhesive member 5, a second adhesive member 6, and wires 7. The battery module 2 includes a plurality of battery cells 11.

[0031] 4, the battery cell 11 is configured by housing an electrode body inside a battery case 12. A first electrode terminal 13, either a positive electrode terminal or a negative electrode terminal, is provided at the end of the battery case 12 on the + side of the Y axis, and a second electrode terminal 14, either a positive electrode terminal or a negative electrode terminal, is provided at the end of the battery case 12 on the - side of the Y axis.

[0032] For example, if the first electrode terminal 13 and the second electrode terminal 14 are provided at the end of the battery case 12 on the +Z axis side, there is a possibility that the first electrode terminal 13 and the second electrode terminal 14 will short-circuit when a load is input to the energy storage device 1 from the +Z axis side.

[0033] In the present embodiment, when the first electrode terminal 13 and the second electrode terminal 14 are provided on the side surface of the battery case 12, a short circuit between the first electrode terminal 13 and the second electrode terminal 14 can be suppressed when a load is input to the energy storage device 1 from the +Z-axis side.

[0034] Such battery cells 11 are stacked in the X-axis direction on each of the positive and negative sides of the Y-axis of the battery module 2 so that the positive and negative terminals are alternately arranged in the X-axis direction.

[0035] 4, on the positive side of the Y axis of the battery module 2, first electrode terminals 13 adjacent in the X axis direction are electrically connected by a first bus bar 15, and on the negative side of the Y axis of the battery module 2, second electrode terminals 14 adjacent in the X axis direction are electrically connected by a second bus bar 16. In this way, the battery cells 11 constituting the battery module 2 are electrically connected in series.

[0036] 2 to 7, the pack case 3 houses the battery modules 2. The pack case 3 includes an upper case 21 and a lower case 22. The upper case 21 includes, for example, a housing portion 21a that protrudes toward the positive side of the Z axis and has an internal space capable of housing the battery modules 2, and a flange portion 21b that protrudes outward from the periphery of the housing portion 21a.

[0037] As shown in Figures 2 to 7, for example, the lower case 22 has a storage section 22a that is recessed toward the Z-axis negative side and has an internal space capable of storing the battery module 2, and a flange section 22b that protrudes outward from the periphery of the storage section 22a.

[0038] With the battery modules 2 arranged at a predetermined interval in the Y-axis direction housed inside the housing portion 21a of the upper case 21 and the housing portion 22a of the lower case 22, the flange portion 21b of the upper case 21 and the flange portion 22b of the lower case 22 are joined with an adhesive member.

[0039] The surface pressure distribution member 4 is a representative example of a device component of the energy storage device 1. The surface pressure distribution member 4 distributes a load input from the Z-axis + side to the surrounding battery cells 11 so that the load is not concentrated on one battery cell 11. As shown in Figs. 3 to 7, the surface pressure distribution member 4 is disposed between the battery module 2 and the housing portion 21a of the upper case 21. Here, Figs. 8 and 9 are XZ cross-sectional views showing an example of a surface pressure distribution member in the energy storage device of this embodiment.

[0040] The surface pressure distribution member 4 may be, for example, a hollow extruded member made of aluminum or the like as shown in Fig. 8, or a solid rigid member made of resin or the like as shown in Fig. 9, and is a substantially rectangular plate body that is long in the Y-axis direction. In this case, the surface pressure distribution member 4 may, for example, cover substantially the entire area of ​​the battery module 2 in the Y-axis direction as shown in Fig. 3.

[0041] 3 to 7, the first adhesive member 5 joins the surface pressure distribution member 4 and the upper case 21. The first adhesive member 5 is made of, for example, an adhesive sheet having adhesive properties on the Z-axis positive side surface and the Z-axis negative side surface of the first adhesive member 5. Note that in FIG. 3, some of the first adhesive members 5 are omitted for simplification.

[0042] 3, the first adhesive members 5 extend in the X-axis direction on the surface on the +Z-axis side of each surface pressure distribution member 4. The first adhesive members 5 are arranged at intervals in the Y-axis direction on the surface on the +Z-axis side of each surface pressure distribution member 4. In this case, it is preferable that the surface on the +Z-axis side of each surface pressure distribution member 4 has a recess formed therein that extends in the X-axis direction to position the first adhesive members 5, as shown in FIG.

[0043] 4 and 5, the second adhesive member 6 joins the battery module 2 and the surface pressure distribution member 4. The second adhesive member 6 may have adhesiveness and flexibility, and may be made of, for example, butyl.

[0044] 7, even if there is a manufacturing error in the height of each battery cell 11 in the Z-axis direction (second direction), the flexibility of the second adhesive member 6 can absorb the manufacturing error and the surface pressure distribution member 4 can be well bonded to each battery cell 11. Therefore, the load input to the surface pressure distribution member 4 from the +Z-axis side can be well distributed to each battery cell 11 via the surface pressure distribution member 4.

[0045] The wire 7 is used, for example, to cut the first adhesive member 5. The wire 7 may have, for example, sufficient rigidity to cut the first adhesive member 5 and may also have insulating properties. The wire 7 may be made of, for example, an insulating-coated piano wire.

[0046] In this embodiment, a first wire 31 and a second wire 32 are arranged as wires 7 for each first adhesive member 5. As shown in Fig. 3, the first wire 31 has a first portion 31a and a second portion 31b. Note that Fig. 3 omits some of the wires 7 for simplification.

[0047] 3, the first portion 31a is disposed inside the energy storage device 1. For example, the first portion 31a is curved into a substantially trapezoidal shape when viewed from the Z-axis direction, and is disposed so as to surround the negative Y-axis side portion of the first adhesive member 5.

[0048] In detail, the end portion of the first portion 31a on the X-axis positive side is fixed to the end portion of the battery module 2 on the X-axis positive side, on an axis that passes through approximately the center of the first adhesive member 5 in the Y-axis direction and extends in the X-axis direction.

[0049] 3, the first portion 31a is inclined toward the negative Y-axis side as it approaches the negative X-axis side, and then extends toward the negative X-axis side while being inserted into the negative Y-axis end of the first adhesive member 5. In other words, at least a part of the first portion 31a is fixed in a state where it is positioned so as to overlap with the battery module 2 when viewed from the Z-axis direction.

[0050] 3, the first portion 31a protrudes from the first adhesive member 5 toward the negative X-axis side and then tilts toward the positive Y-axis side as it moves toward the negative X-axis side. In this case, the negative X-axis side end of the first portion 31a passes through approximately the center of the first adhesive member 5 in the Y-axis direction and is positioned on an axis extending in the X-axis direction.

[0051] 3, the second portion 31b is disposed outside the energy storage device 1. The second portion 31b extends, for example, from the first portion 31a toward the negative X-axis side. In this case, it is preferable that the negative X-axis side end of the second portion 31b protrudes toward the negative X-axis side from the pack case 3 via an adhesive member that joins the flange portion 21b of the upper case 21 and the flange portion 22b of the lower case 22.

[0052] As shown in Figure 3, when viewed from the Z-axis direction, the second wire 32 is in an axisymmetric relationship with the first wire 31, with the axis of symmetry passing through approximately the center of the first adhesive member 5 in the Y-axis direction and extending in the X-axis direction. Therefore, although detailed explanation is omitted, the second wire 32 has a first portion 32a and a second portion 32b.

[0053] In this case, the second portion 31b of the first wire 31 and the second portion 32b of the second wire 32 may be woven so as to be easily gripped by an operator, as shown in Fig. 3. The electricity storage device 1 may be fixed from below to a frame-shaped frame 101 of a vehicle 100, for example, as shown in Fig. 6.

[0054] Here, for example, upper case 21 of power storage device 1 may form the floor surface (floor panel) of the passenger compartment of vehicle 100. When upper case 21 of power storage device 1 forms the floor surface of the passenger compartment of vehicle 100, a floor mat, a floor silencer, or the like may be disposed on the surface of upper case 21 of power storage device 1 on the +Z axis side.

[0055] Next, a description will be given of a flow of disassembling the energy storage device 1 of this embodiment. For example, with the energy storage device 1 removed from the vehicle 100, an operator pulls the second portion 31b of the first wire 31 and the second portion 32b of the second wire 32 toward the negative side of the X-axis.

[0056] As a result, the first portion 31a of the first wire 31 is arranged to surround the Y-axis -side portion of the first adhesive member 5 when viewed from the Z-axis direction, and as the first wire 31 is pulled toward the X-axis -side, it deforms linearly and cuts the Y-axis -side portion of the first adhesive member 5.

[0057] Similarly, the first portion 32a of the second wire 32 is disposed so as to surround the portion of the first adhesive member 5 on the +Y-axis side when viewed from the Z-axis direction, and therefore, as the second wire 32 is pulled in on the -X-axis side, it deforms linearly and cuts the portion of the first adhesive member 5 on the +Y-axis side. As a result, the first adhesive member 5 can be cut.

[0058] By repeating this process and cutting each of the first adhesive members 5, the bonding between the surface pressure distribution members 4 and the upper case 21 is released. Then, when the worker opens the upper case 21 from the lower case 22, the electricity storage device 1 can be disassembled.

[0059] In this way, in the energy storage device 1 of this embodiment, when the first wires 31 and the second wires 32 are pulled toward the negative side of the X-axis, the first adhesive members 5 can be easily cut. Therefore, the energy storage device 1 of this embodiment can be easily disassembled when, for example, recycling the battery cells 11 inside the energy storage device 1 or replacing equipment such as an SBM (Satellite Battery Module) arranged inside the energy storage device 1, and the maintainability of the energy storage device 1 can be improved.

[0060] Moreover, in the energy storage device 1 of this embodiment, the first wire 31 and the second wire 32 have insulating properties, which can prevent short circuits between the battery cells 11. Furthermore, the first wire 31 and the second wire 32 are arranged inside the first adhesive member 5, so that the first wire 31 and the second wire 32 can be stabilized inside the energy storage device 1 while being supported by the first adhesive member 5.

[0061] <Embodiment 2> Fig. 10 is an XZ cross-sectional view for explaining the vehicle mounting structure of the electricity storage device of this embodiment. Fig. 11 is a perspective view for explaining the arrangement of the surface pressure dispersing member in the electricity storage device of this embodiment. Fig. 12 is a YZ cross-sectional view at position XII-XII in Fig. 10. Fig. 13 is a YZ cross-sectional view at position XIII-XIII in Fig. 10.

[0062] Since the power storage device 41 of this embodiment has substantially the same configuration as the power storage device 1 of the first embodiment, duplicated explanations will be omitted and the same members will be described using the same reference numerals. Note that the wire rod 7 and the like are omitted from Figs. 10 to 13.

[0063] The mounting structure of the storage device 41 on the vehicle 100 in this embodiment is configured such that, when viewed from the Z-axis direction, the storage device 41 is fixed to the frame 101 of the vehicle 100 so that the surface pressure distribution member 42 is positioned avoiding the area where the first vehicle frame member 101a and the second vehicle frame member 101b that form part of the frame 101 of the vehicle 100 are positioned, as shown in Figures 10 to 13.

[0064] In other words, as shown in FIG. 11, when the power storage device 41 is fixed to the frame 101 of the vehicle 100, the surface pressure distribution member 42 is arranged so as to avoid the area where the first vehicle frame member 101a and the second vehicle frame member 101b are arranged, as viewed from the Z-axis direction.

[0065] The first vehicle frame member 101a and the second vehicle frame member 101b may be, for example, seat cloths used to secure seats in the vehicle 100, and extend in the Y-axis direction as shown in Figures 10 and 13.

[0066] 10 to 13, the surface pressure distribution members 42 may be arranged so as to bridge adjacent battery modules 2 in the Y-axis direction. As shown in Fig. 10, the surface pressure distribution members 42 may be arranged, for example, in an area on the positive side of the X-axis with respect to the first vehicle frame member 101a, and in an area between the first vehicle frame member 101a and the second vehicle frame member 101b, as viewed from the Y-axis direction.

[0067] In this case, the first adhesive members 5 may extend in the X-axis direction between each surface pressure distribution member 42 and the upper case 21, and may be arranged at intervals in the Y-axis direction in an area that overlaps with each battery module 2 when viewed from the Z-axis direction.

[0068] The wires 7 are preferably arranged so as to bridge the first adhesive members 5 arranged in the X-axis direction. The second adhesive members 6 are preferably arranged between each of the surface pressure distribution members 42 and the battery modules 2.

[0069] In other words, compared to the energy storage device 1 of embodiment 1, the energy storage device 41 of this embodiment can be configured, for example, by omitting the first adhesive member 5 and the second adhesive member 6 in the area where the surface pressure distribution member 42 is not arranged.

[0070] As described above, in the mounting structure of the electric storage device 41 of the present embodiment on the vehicle 100, the surface pressure distribution member 42 is arranged to avoid the area where the first vehicle frame member 101a and the second vehicle frame member 101b are arranged, where no load is input from the Z axis + side to the electric storage device 41, as viewed from the Z axis direction. Therefore, the electric storage device 41 of the present embodiment can be manufactured more inexpensively and more lightweight than the electric storage device 1 of the first embodiment.

[0071] <Third Embodiment> 14 is a diagram illustrating the configuration between adjacent battery cells in the X-axis direction in the power storage device of the present embodiment. Note that the power storage device 51 of the present embodiment has substantially the same configuration as the power storage device 1 of the first embodiment and the power storage device 41 of the second embodiment, so duplicated explanations will be omitted and the same members will be described using the same reference numerals.

[0072] 14, the electricity storage device 51 of this embodiment includes a load-receiving member 53 to which a load is transmitted from the surface pressure distribution member 52. The load-receiving member 53 can be formed of an adhesive member such as an elastomer sheet having insulating properties and elasticity, and is disposed between adjacent battery cells 11 in the X-axis direction to join the adjacent battery cells 11, for example.

[0073] 14, the end of the load receiving member 53 on the +Z axis side is in contact with the surface pressure distribution member 4 so as to be able to transmit the load from the surface pressure distribution member 4. In this case, the end of the load receiving member 53 on the -Z axis side may or may not be in contact with the heat transfer member 23 arranged between the battery cell 11 and the lower case 22.

[0074] 14, the load receiving member 53 may have cutouts 53a at an end portion on the +Z-axis side of the load receiving member 53 and an end portion on the -Z-axis side of the load receiving member 53. The cutouts 53a may have a substantially rectangular shape when viewed from the Y-axis direction, for example, and extend in the Y-axis direction so as to cut out a corner portion on the +Z-axis side and the +X-axis side of the load receiving member 53 and a corner portion on the -Z-axis side and the +X-axis side of the load receiving member 53.

[0075] 14, the surface pressure distribution member 52 may include ribs 52a that protrude toward the negative Z-axis side and are spaced apart in the X-axis direction. The ribs 52a may have a substantially rectangular shape when viewed from the Y-axis direction, and may extend in the Y-axis direction while being positioned between battery cells 11 adjacent to each other in the X-axis direction.

[0076] 14, the end of the rib 52a on the negative Z-axis side is preferably inserted into the cutout 53a on the positive Z-axis side of the load-receiving member 53 and is in contact with the bottom of the cutout 53a. This ensures that the load input to the negative Z-axis side can be transmitted from the surface pressure dispersing member 52 to the load-receiving member 53.

[0077] In this way, the storage device 51 of this embodiment can transmit the load input to the negative side of the Z axis from the surface pressure distribution member 52 to the load-receiving member 53, and can prevent the load input to the negative side of the Z axis from being excessively transmitted to the battery cell 11.

[0078] Furthermore, adjacent battery cells 11 in the X-axis direction can be joined via the load-receiving members 53, thereby improving the rigidity of the battery module.

[0079] The shape of the load-receiving member 53 is not limited to the above-mentioned shape, and may be any shape that can transmit the load input to the negative Z-axis side from the surface pressure dispersing member 52; for example, the cutout portion 53a may be omitted.

[0080] Furthermore, the shape of the surface pressure dispersion member 52 is not limited to the above-mentioned shape, and may be any shape that can transmit the load input to the negative Z-axis side to the load receiving member 53, and for example, the rib 52a may be omitted.

[0081] <Fourth Embodiment> 15 is a YZ cross-sectional view for explaining the arrangement of adhesive members, a cooling device, battery modules, etc. in the power storage device of this embodiment. Since the power storage device 61 of this embodiment has substantially the same configuration as the power storage device 1 of embodiment 1, etc., redundant explanations will be omitted, but as shown in FIG. 15, a cooling device 62 is used as a representative example of the device components.

[0082] As a result, the electricity storage device 61 of this embodiment can be easily disassembled when, for example, replacing the cooling device 62, and the maintainability of the electricity storage device 61 can be improved.

[0083] <Fifth Embodiment> 16 is a YZ cross-sectional view for explaining the arrangement of adhesive members, device components, battery modules, etc. in the energy storage device of this embodiment. Energy storage device 71 of this embodiment has substantially the same configuration as energy storage device 1 of embodiment 1, etc., so duplicated explanations will be omitted, but as shown in FIG. 16, device components 72 such as surface pressure dispersion members and cooling devices are arranged on the negative side of the Z axis with respect to battery modules 2.

[0084] 16 , the device component 72 is joined to the lower case 22 via a first adhesive member 73, and is joined to the battery module 2 via a second adhesive member 74. Then, for example, a wire 75 having the same configuration as the wire 7 of the first embodiment is disposed inside the first adhesive member 73.

[0085] As a result, the power storage device 71 of this embodiment can also be easily disassembled, and the maintainability of the power storage device 71 can be improved.

[0086] The present disclosure is not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present disclosure. For example, the above-described embodiments 1 to 5 may be combined as appropriate.

[0087] For example, although the battery cells 11 in the above embodiment extend in the X-axis direction, they may also extend in the Y-axis direction. In addition, the arrangement of the first electrode terminals 13 and the second electrode terminals 14 is not limited, as long as they are provided on any surface of the battery case 12.

[0088] For example, in the energy storage devices 1, 41, and 51 of the above embodiments, the upper case 21 and the surface pressure distribution member 4, 42, and 52 are joined by the first adhesive member 5, and the surface pressure distribution member 4 and the battery module 2 are joined by the second adhesive member 6, but this is not limited to this.

[0089] 17, a hat-shaped surface pressure distribution member 81 may be joined to the upper case 21 by welding or the like. In this case, it is preferable that the second adhesive member 6 be configured so as to be cut by the wire 7.

[0090] For example, the arrangement and shape of the surface pressure distribution members 4, 42, 52, 81 in the above-described embodiments are merely examples, and any arrangement and shape may be used as long as it can distribute the load input to the power storage devices 1, 41, 51, etc. from the Z-axis + side to each battery cell 11. Furthermore, the arrangement and shape of the cooling device 62 and device component 72 in the above-described embodiments are also merely examples.

[0091] Furthermore, for example, in the energy storage device 1 of the above embodiment, a surface pressure distribution member and a cooling device are exemplified as device components, but any component placed between the battery module 2 and the pack case 3 may be used, and the device components may form part of the case 3.

[0092] Therefore, the arrangement and shape of the first adhesive members 5, 73 and the second adhesive members 6, 74 may be changed as appropriate depending on the arrangement and shape of the device components and the cooling device. In addition, the arrangement and shape of the wires 7, 75 may be changed as appropriate depending on the arrangement and shape of the first adhesive members 5, 73 and the second adhesive members 6, 74.

[0093] In short, the wire may be arranged or shaped in any way that allows it to cut the adhesive member arranged between the battery module 2 and the pack case 3, and does not have to be arranged, for example, inside the first adhesive member 5, 73 or the second adhesive member 6, 74. [Explanation of symbols]

[0094] 1. Energy storage device 2 Battery Module 3-pack case 4. Surface pressure dispersion member 5 First adhesive member 6 Second adhesive member 7 Wire rod 11 Battery Cells 12 Battery case 13 First electrode terminal 14 Second electrode terminal 15 First bus bar 16 Second busbar 21 upper case, 21a housing portion, 21b flange portion 22 lower case, 22a housing portion, 22b flange portion 23 Heat transfer material 31 first wire, 31a first portion, 31b second portion 32 second wire, 32a first portion, 32b second portion 41 Energy storage device 42 Surface pressure dispersion member 51 Power storage device 52 surface pressure dispersion member, 52a rib 53 load-receiving member, 53a notch 61 Power storage device 62 Cooling device 71 Energy storage device 72 Device components 73 First adhesive member 74 Second adhesive member 75 Wire rod 81 Surface pressure dispersion member 100 vehicles 101 frame, 101a first vehicle frame member, 101b second vehicle frame member

Claims

1. a battery module including a plurality of battery cells; a case that accommodates at least a portion of the battery module; a device component positioned between the battery module and the case; an adhesive member that bonds the device component and the battery module; A power storage device comprising: A power storage device having a wire including a first portion disposed inside the power storage device and a second portion disposed outside the power storage device.

2. The power storage device according to claim 1 , wherein the wire has insulating properties.

3. The power storage device according to claim 1 , wherein the first portion of the wire includes a portion that is arranged at a position that overlaps the battery module when viewed from a direction in which the battery module and the device component face each other.

4. The power storage device according to claim 1 , wherein the first portion of the wire includes a portion that is fixed at a position that overlaps the battery module when viewed from a direction in which the battery module and the device component face each other.

5. The power storage device according to claim 1 , wherein the first portion of the wire includes a portion that contacts the adhesive member.

6. The power storage device according to claim 1 , wherein the first portion of the wire is curved when viewed from a direction in which the battery module and the device component face each other.

7. The power storage device according to claim 6 , wherein the wire is disposed inside the adhesive member.

8. The device component is a surface pressure dispersion member, the adhesive members include a first adhesive member that joins the surface pressure distribution member and the case, and a second adhesive member that joins the surface pressure distribution member and the battery module, The power storage device according to claim 7 , wherein the wire is disposed inside the first adhesive member.

9. The power storage device according to claim 8 , further comprising a load receiving member disposed between adjacent battery cells, the load being transmitted from the surface pressure distribution member to the load receiving member.

10. The power storage device according to claim 9 , wherein the surface pressure distribution member includes a rib that protrudes so as to be disposed between adjacent battery cells and presses against the load receiving member.

11. The power storage device according to claim 10 , wherein the load-receiving member has insulating properties.

12. The power storage device according to claim 1 , wherein the battery cells each include an electrode terminal on at least one of a pair of surfaces that face each other in a direction perpendicular to a direction in which the battery module and the device component face each other.

13. The power storage device according to claim 1 , wherein the device component constitutes at least a part of the case.

14. The vehicle mounting structure for the electricity storage device according to any one of claims 1 to 5, a first vehicle frame member disposed above the battery module and extending in a vehicle width direction of the vehicle; a second vehicle frame member disposed above the battery module and spaced apart from the first vehicle frame member in the front-to-rear direction of the vehicle, and extending in a vehicle width direction of the vehicle; Equipped with The device component is a surface pressure dispersion member, The structure for mounting an electricity storage device on a vehicle, wherein the surface pressure distribution member is disposed between the first vehicle frame member and the second vehicle frame member.

15. The vehicle mounting structure for an electric storage device according to claim 14, wherein the first vehicle frame member and the second vehicle frame member are seat cloths.

16. a battery module including a plurality of battery cells; a case that accommodates at least a portion of the battery module; an adhesive member that bonds the case and the battery module; A power storage device comprising: an electric storage device having a wire including: a first portion arranged in a position overlapping the battery module when viewed from a direction in which the battery module and the case face each other; and a second portion arranged in a position not overlapping the battery module when viewed from a direction in which the battery module and the case face each other.

17. The power storage device according to claim 16 , wherein the battery cell includes an electrode terminal on at least one of a pair of surfaces that face each other in a direction perpendicular to the direction in which the battery module and the case face each other.

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