Power storage device and vehicle mounted structure of same

Abstract

The purpose of the present invention is to provide a power storage device and a vehicle mounting structure for the power storage device, which contribute to improving the maintainability of the interior of the power storage device. A power storage device according to the present disclosure is provided with: a battery module including a plurality of battery cells; a case that accommodates at least a portion of the battery module; a device constituting member located between the battery module and the case; and an adhesive member that adheres the device-constituting member and the battery module, in which the power storage device has a wire material that includes a first portion disposed inside the power storage device and a second portion disposed outside the power storage device.

Description

Technical Field

[0001] The present disclosure relates to a power storage device and a structure for mounting the power storage device on a vehicle. Background Art

[0002] For example, the power storage device disclosed in Patent Document 1 has a housing formed by left and right longitudinal beams, a front cross member, a rear cross member, a floor pan, and a bottom portion. The battery modules are housed in a small space within the housing, partitioned by a center tunnel and intermediate cross members. In this case, the floor pan also serves as the vehicle's floor panel.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-202946

[0004] For example, in a power storage device such as that described in Patent Document 1, a surface pressure distribution member is disposed between the unit cell and the upper case to distribute input from above to the unit cell, and the surface pressure distribution member is fixed with an adhesive member. This deteriorates the maintainability of the interior of the power storage device. Summary of the Invention

[0005] The present disclosure has been made in view of such problems, and aims to realize an electric storage device and a vehicle-mounted structure for the electric storage device that contribute to improved maintainability of the interior of the electric storage device.

[0006] An electric storage device according to one aspect of the present disclosure includes:

[0007] A battery module, comprising a plurality of single cells;

[0008] a housing, the housing housing at least a portion of the battery module;

[0009] a device component, the device component being located between the battery module and the housing; and

[0010] an adhesive member for bonding the device component and the battery module together;

[0011] in,

[0012] The electricity storage device includes a wire including a first portion arranged inside the electricity storage device and a second portion arranged outside the electricity storage device.

[0013] In the above-mentioned electricity storage device, it is preferable that the wire material has insulating properties.

[0014] In the above-mentioned power storage device, preferably, the first portion of the wire material includes a portion arranged at a position overlapping the battery module when viewed in a direction in which the battery module and the device component are opposed.

[0015] In the above-mentioned power storage device, preferably, the first portion of the wire includes a portion fixed at a position overlapping the battery module when viewed in a direction in which the battery module and the device component are opposed.

[0016] In the above-mentioned electricity storage device, preferably, the first portion of the wire material includes a portion in contact with the adhesive member.

[0017] In the above-mentioned power storage device, preferably, the first portion of the wire is bent when viewed from a direction in which the battery module and the device component face each other.

[0018] In the above-mentioned electricity storage device, it is preferable that the wire material is arranged inside the bonding member.

[0019] Preferably, in the above-mentioned power storage device, the above-mentioned device component is a surface pressure dispersion member.

[0020] in,

[0021] The adhesive member includes a first adhesive member for bonding the surface pressure distribution member to the housing and a second adhesive member for bonding the surface pressure distribution member to the battery module.

[0022] The wire material is arranged inside the first bonding member.

[0023] The power storage device preferably includes a load receiving member that is disposed between the adjacent unit cells and to which the load is transmitted from the surface pressure distribution member.

[0024] In the above-mentioned electricity storage device, it is preferable that the surface pressure distribution member includes a rib that protrudes so as to be arranged between the adjacent unit cells and presses the load receiving member.

[0025] In the above-mentioned electricity storage device, it is preferable that the load receiving member has insulating properties.

[0026] In the power storage device, the unit cells preferably include electrode terminals on at least one of a pair of facing surfaces, wherein the facing surfaces face each other in a direction perpendicular to a direction in which the battery module and the device component face each other.

[0027] In the above-mentioned power storage device, preferably, the device component constitutes at least a portion of the case.

[0028] The above-mentioned structure for mounting an electric storage device on a vehicle preferably includes:

[0029] a first vehicle frame member disposed above the battery module and extending in the vehicle width direction; and

[0030] a second vehicle frame member disposed above the battery module and spaced apart from the first vehicle frame member in the front-rear direction of the vehicle and extending in the vehicle width direction of the vehicle;

[0031] The components of the above device are surface pressure dispersion components,

[0032] The surface pressure distribution member is disposed between the first vehicle frame member and the second vehicle frame member.

[0033] In the above-described structure for mounting an electric storage device on a vehicle, preferably, the first vehicle frame member and the second vehicle frame member are seat cross members.

[0034] An electric storage device according to one aspect of the present disclosure includes:

[0035] A battery module, comprising a plurality of single cells;

[0036] a housing that receives at least a portion of the battery module; and

[0037] an adhesive component for bonding the housing and the battery module together.

[0038] in,

[0039] The above-mentioned power storage device has a wire rod, which includes a first part arranged at a position overlapping with the above-mentioned battery module when viewed from a direction opposite to the above-mentioned shell, and a second part arranged at a position not overlapping with the above-mentioned battery module when viewed from a direction opposite to the above-mentioned shell.

[0040] In the above-mentioned power storage device, the unit cells preferably include electrode terminals on at least one of a pair of facing surfaces, wherein the facing surfaces face each other in a direction perpendicular to a direction in which the battery module and the case face each other.

[0041] According to the present disclosure, it is possible to realize an electric storage device and a vehicle-mounting structure for the electric storage device that contribute to improved maintainability of the interior of the electric storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description and accompanying drawings given below.

[0043] Figure 1This is a diagram showing a state where the power storage device according to the first embodiment is mounted on a vehicle.

[0044] Figure 2 This is an exploded view showing a simplified view of the power storage device according to the first embodiment.

[0045] Figure 3 These are diagrams for explaining the arrangement of a surface pressure distribution member, an adhesive member, a wire material, and the like in the power storage device according to the first embodiment.

[0046] Figure 4 It is a YZ cross-sectional view of a part of the power storage device according to the first embodiment.

[0047] Figure 5 It is a YZ cross-sectional view for explaining the arrangement of the adhesive member, the surface pressure distribution member, and the battery module in the power storage device according to the first embodiment.

[0048] Figure 6 This is an XZ cross-sectional view of the power storage device according to the first embodiment.

[0049] Figure 7 This is an XZ cross-sectional view for explaining the arrangement of the surface pressure distribution member, the adhesive member, and the battery module in the power storage device according to the first embodiment.

[0050] Figure 8 This is an XZ cross-sectional view showing an example of the surface pressure distribution member in the power storage device according to the first embodiment.

[0051] Figure 9 This is an XZ cross-sectional view showing an example of the surface pressure distribution member in the power storage device according to the first embodiment.

[0052] Figure 10 It is an XZ cross-sectional view for explaining the vehicle mounting structure of the power storage device according to the second embodiment.

[0053] Figure 11 This is a perspective view for explaining the arrangement of the surface pressure distribution member in the power storage device according to the second embodiment.

[0054] Figure 12 yes Figure 10 YZ cross-sectional view at position XII-XII.

[0055] Figure 13 yes Figure 10 YZ cross-sectional view at position XIII-XIII.

[0056] Figure 14 This is a diagram for explaining the structure of unit cells adjacent to each other in the X-axis direction in the power storage device according to the third embodiment.

[0057] Figure 15 It is a YZ cross-sectional view for explaining the arrangement of the bonding member, the cooling device, the battery module, etc. in the power storage device according to the fourth embodiment.

[0058] Figure 16 It is a YZ cross-sectional view for explaining the arrangement of bonding members, device components, a battery module, and the like in the power storage device according to the fifth embodiment.

[0059] Figure 17 It 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

[0060] Specific embodiments to which the present disclosure is applied are described in detail below with reference to the accompanying drawings. However, the present disclosure should not be limited to the following embodiments. In addition, the following description and drawings are appropriately simplified for clarity. In addition, in the following description, a three-dimensional (XYZ) coordinate system is used for clarity.

[0061] <Implementation Method 1>

[0062] First, the structure of the power storage device according to this embodiment will be described. Figure 1 : is a diagram showing a state where the power storage device of this embodiment is mounted on a vehicle. Figure 1 As shown, the power storage device 1 is preferably a power storage device mounted on a vehicle 100 .

[0063] Here, the X-axis + side is the front side of the vehicle 100, and the X-axis - side is the rear side of the vehicle 100. The Y-axis + side is the left side of the vehicle 100, and the Y-axis - side is the right side of the vehicle 100. The Z-axis + side is the upper side of the vehicle 100, and the Z-axis - side is the lower side of the vehicle 100.

[0064] Figure 2 This is an exploded view showing a simplified view of the power storage device according to this embodiment. Figure 3 These are diagrams for explaining the arrangement of a surface pressure distribution member, an adhesive member, a wire material, and the like in the power storage device according to the present embodiment. Figure 4 It is a YZ cross-sectional view of a part of the power storage device according to the present embodiment.

[0065] Figure 5 It is a YZ cross-sectional view for explaining the arrangement of the adhesive member, the surface pressure distribution member, and the battery module in the power storage device of the present embodiment. Figure 6 It is an XZ cross-sectional view of the power storage device according to this embodiment. Figure 7 This is an XZ cross-sectional view for explaining the arrangement of the surface pressure distribution member, the adhesive member, and the unit cells in the power storage device of the present embodiment.

[0066] like Figures 2 to 7 As shown, the power storage device 1 includes a battery module 2, a battery pack case 3, a surface pressure distribution member 4, a first adhesive member 5, a second adhesive member 6, and a wire 7. The battery module 2 includes a plurality of unit cells 11.

[0067] For example, Figure 4 As shown, a single cell 11 is formed by housing an electrode assembly within a battery case 12. A first electrode terminal 13, which serves as either a positive electrode terminal or a negative electrode terminal, is provided at the end of the battery case 12 on the Y-axis (+) side, and a second electrode terminal 14, which serves as the other of the positive electrode terminal and the negative electrode terminal, is provided at the end of the battery case 12 on the Y-axis (-) side.

[0068] For example, when the first electrode terminal 13 and the second electrode terminal 14 are provided at the Z-axis positive side end of the battery case 12 , when a load is input to the power storage device 1 from the Z-axis positive side, the first electrode terminal 13 and the second electrode terminal 14 may be short-circuited.

[0069] When the first electrode terminal 13 and the second electrode terminal 14 are provided on the side surfaces of the battery case 12 as in this embodiment, 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 power storage device 1 from the Z-axis positive side.

[0070] The unit cells 11 are stacked in the X-axis direction such that the positive electrode terminals and the negative electrode terminals are alternately arranged in the X-axis direction on the Y-axis + side and the Y-axis − side of the battery module 2 .

[0071] Moreover, if Figure 4 As shown, on the Y-axis positive side of the battery module 2, adjacent first electrode terminals 13 in the X-axis direction are electrically connected via a first bus bar 15, and on the Y-axis negative side of the battery module 2, adjacent second electrode terminals 14 in the X-axis direction are electrically connected via a second bus bar 16. Thus, the single cells 11 constituting the battery module 2 are electrically connected in series.

[0072] like Figures 2 to 7 As shown, the battery pack case 3 houses the battery module 2. The battery 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 module 2, and a flange portion 21b that protrudes outward from the periphery of the housing portion 21a.

[0073] For example, Figures 2 to 7 As shown, the lower case 22 includes a housing portion 22 a recessed toward the Z-axis side to have an internal space capable of housing the battery module 2 , and a flange portion 22 b protruding outward from the periphery of the housing portion 22 a .

[0074] In a state where the battery modules 2 are accommodated in the interior of the accommodating portion 21a of the upper shell 21 and the accommodating portion 22a of the lower shell 22 at a predetermined interval in the Y-axis direction, the flange portion 21b of the upper shell 21 and the flange portion 22b of the lower shell 22 are joined by an adhesive component.

[0075] The surface pressure dispersing member 4 is a representative example of a component of the power storage device 1. The surface pressure dispersing member 4 distributes the load to the surrounding cells 11 to prevent the load input to the power storage device 1 from being concentrated on a single cell 11. Figures 3 to 7 As shown, the surface pressure distribution member 4 is arranged between the battery module 2 and the receiving portion 21a of the upper case 21. Figure 8 and Figure 9 This is an XZ cross-sectional view showing an example of the surface pressure distribution member in the power storage device according to the present embodiment.

[0076] The surface pressure dispersing member 4 may be, for example, Figure 8 A hollow extruded part made of aluminum or the like as shown, or Figure 9 The solid rigid member made of resin or the like as shown is a substantially rectangular plate body that is long in the Y-axis direction. Figure 3 As shown, the surface pressure distribution member 4 can cover substantially the entire area of ​​the battery module 2 in the Y-axis direction.

[0077] like Figures 3 to 7 As shown, the first adhesive member 5 joins the surface pressure dispersion member 4 to the upper shell 21. The first adhesive member 5 is composed of, for example, an adhesive sheet having adhesive properties on the surface on the Z axis + side and the surface on the Z axis - side of the first adhesive member 5. Figure 3 In the figure, a part of the first adhesive member 5 is omitted for simplification.

[0078] For example, Figure 3 As shown, the first adhesive member 5 extends along the X-axis direction on the surface of each surface pressure dispersing member 4 on the Z-axis + side. Furthermore, the first adhesive member 5 is arranged on the surface of each surface pressure dispersing member 4 on the Z-axis + side with a gap in the Y-axis direction. In this case, the surface of the surface pressure dispersing member 4 on the Z-axis + side can be as follows Figure 5 As shown in FIG. 1 and FIG. 2 , the recessed portion for positioning the first adhesive member 5 is formed to extend in the X-axis direction.

[0079] like Figure 4 and Figure 5 As shown, 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, waterproof adhesive.

[0080] Therefore, if Figure 7 As shown, even if there are manufacturing errors in the height of each unit cell 11 in the Z-axis direction (second direction), the flexibility of the second adhesive member 6 can absorb these manufacturing errors, thereby satisfactorily bonding the surface pressure distribution member 4 to each unit cell 11. Therefore, the load input to the surface pressure distribution member 4 from the Z-axis positive side can be well distributed to each unit cell 11 via the surface pressure distribution member 4.

[0081] The wire 7 is used, for example, to cut the first adhesive member 5. The wire 7 may have enough rigidity to cut the first adhesive member 5 and may have insulating properties. The wire 7 may be made of, for example, an insulatingly coated piano wire.

[0082] In this embodiment, a first wire 31 and a second wire 32 are arranged as the wires 7 for each first adhesive member 5. Figure 3 As shown, the first wire 31 includes a first portion 31a and a second portion 31b. Figure 3 In the figure, part of the wire 7 is omitted for simplification.

[0083] like Figure 3 As shown, the first portion 31a is arranged inside the power storage device 1. The first portion 31a is arranged to be curved in a substantially trapezoidal shape when viewed from the Z-axis direction, for example, and surrounds the Y-axis-side portion of the first adhesive member 5.

[0084] Specifically, the X-axis positive end of the first portion 31 a passes approximately through the center of the first adhesive member 5 in the Y-axis direction and is fixed to the X-axis positive end of the battery module 2 along an axis extending in the X-axis direction.

[0085] Moreover, if Figure 3 As shown, the first portion 31a extends toward the X-axis side after being inserted into the Y-axis-side end of the first adhesive member 5 while tilting toward the X-axis side. Specifically, at least a portion of the first portion 31a is fixed so as to overlap the battery module 2 when viewed from the Z-axis direction.

[0086] In addition, if Figure 3 As shown, the first portion 31a protrudes from the first adhesive member 5 toward the X-axis - side and then tilts toward the Y-axis + side as it moves toward the X-axis - side. At this point, the X-axis - side end of the first portion 31a passes approximately through the center of the first adhesive member 5 in the Y-axis direction and is positioned on an axis extending along the X-axis direction.

[0087] like Figure 3As shown, the second portion 31b is disposed outside the power storage device 1. The second portion 31b extends, for example, from the first portion 31a toward the X-axis side. In this case, the X-axis-side end of the second portion 31b can protrude from the battery pack case 3 toward the X-axis side 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.

[0088] like Figure 3 As shown, when viewed from the Z-axis direction, the second wire 32 has a linear symmetry relationship with the first wire 31 with the axis passing through the approximate center of the Y-axis direction of the first adhesive component 5 and extending along the X-axis direction as the symmetry axis, so its detailed description is omitted, but the second wire 32 has a first part 32a and a second part 32b.

[0089] At this time, if Figure 3 As shown, the second portion 31b of the first wire 31 and the second portion 32b of the second wire 32 can be woven in a manner that is easy for a worker to hold. Figure 6 As shown, such an electric storage device 1 can be fixed to a frame 101 of a frame type in a vehicle 100 from below.

[0090] Here, for example, the upper case 21 of the power storage device 1 may constitute the floor surface (floor panel) of the interior of the vehicle 100. Furthermore, when the upper case 21 of the power storage device 1 constitutes the floor surface of the interior of the vehicle 100, a floor mat, a floor muffler, etc. may be disposed on the surface of the upper case 21 of the power storage device 1 on the Z-axis positive side.

[0091] Next, the process of disassembling the power storage device 1 of this embodiment will be described. For example, with the power storage device 1 removed from the vehicle 100 , a worker pulls the second portion 31 b of the first wire 31 and the second portion 32 b of the second wire 32 toward the X-axis − side.

[0092] Therefore, since the first portion 31a of the first wire 31 is configured to surround the Y-axis-side portion of the first adhesive component 5 when viewed from the Z-axis direction, as the first wire 31 is pulled toward the X-axis side, the first wire 31 is deformed into a straight line and the Y-axis-side portion of the first adhesive component 5 is cut off.

[0093] Similarly, since the first portion 32a of the second wire 32 is arranged so as to surround the portion of the first adhesive member 5 on the Y-axis positive side when viewed in the Z-axis direction, when the second wire 32 is pulled toward the X-axis negative side, the second wire 32 deforms into a straight line and cuts the portion of the first adhesive member 5 on the Y-axis positive side. As a result, the first adhesive member 5 can be cut.

[0094] By repeating this process and cutting each first adhesive member 5, the surface pressure distribution member 4 is released from the bond with the upper case 21. Then, the worker opens the upper case 21 relative to the lower case 22 to disassemble the power storage device 1.

[0095] Thus, in the power storage device 1 of this embodiment, the first adhesive member 5 can be easily cut by pulling the first wire 31 and the second wire 32 toward the - side of the X-axis. Therefore, in the power storage device 1 of this embodiment, for example, when recovering the cells 11 within the power storage device 1 or replacing a device such as an SBM (Satellite Battery Module) disposed within the power storage device 1, the power storage device 1 can be easily disassembled, thereby improving the maintainability of the power storage device 1.

[0096] Furthermore, in the power storage device 1 of this embodiment, since the first wire 31 and the second wire 32 have insulating properties, short circuits between the single cells 11 can be suppressed. Furthermore, since the first wire 31 and the second wire 32 are disposed within the first adhesive member 5, the first wire 31 and the second wire 32 can be stabilized within the power storage device 1 while being supported by the first adhesive member 5.

[0097] <Implementation Method 2>

[0098] Figure 10 It is an XZ cross-sectional view for explaining the vehicle mounting structure of the power storage device according to the present embodiment. Figure 11 This is a perspective view for explaining the arrangement of the surface pressure distribution member in the power storage device according to the present embodiment. Figure 12 yes Figure 10 YZ cross-sectional view at position XII-XII. Figure 13 yes Figure 10 YZ cross-sectional view at position XIII-XIII.

[0099] In addition, since the power storage device 41 of this embodiment has substantially the same structure as the power storage device 1 of the first embodiment, repeated description will be omitted and the same reference numerals will be used for the same components. Figures 10 to 13 , wire 7 and the like are omitted.

[0100] The power storage device 41 of the present embodiment is mounted on the vehicle 100 in a structure such that, when viewed from the Z-axis direction, Figures 10 to 13As shown, the power storage device 41 is fixed to the frame 101 of the vehicle 100 so that the surface pressure distribution member 42 is arranged avoiding the area where the first vehicle frame member 101a and the second vehicle frame member 101b constituting part of the frame 101 of the vehicle 100 are arranged.

[0101] That is, Figure 11 As shown, the power storage device 41 has a structure in which, 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 101 a and the second vehicle frame member 101 b are arranged, as viewed from the Z-axis direction.

[0102] The first vehicle frame member 101a and the second vehicle frame member 101b may be, for example, seat crossbars used to fix seats of the vehicle 100. Figure 10 and Figure 13 As shown, it extends along the Y-axis direction.

[0103] like Figures 10 to 13 As shown in FIG. 4 , the surface pressure dispersing member 42 may be arranged so as to span the battery modules 2 adjacent to each other in the Y-axis direction. Figure 10 As shown, the surface pressure distribution member 42 can be arranged in a region on the X-axis positive side relative to the first vehicle frame member 101a and a region between the first vehicle frame member 101a and the second vehicle frame member 101b when viewed in the Y-axis direction.

[0104] At this time, the first adhesive component 5 can, for example, extend along the X-axis direction between each surface pressure distribution component 42 and the upper shell 21, and when viewed from the Z-axis direction, in the area overlapping with each battery module 2, the first adhesive component 5 is arranged in a spaced manner in the Y-axis direction.

[0105] Furthermore, the wire members 7 may be arranged so as to straddle the first adhesive members 5 arranged in the X-axis direction. In addition, the second adhesive member 6 may be arranged between each surface pressure distribution member 42 and the battery module 2 .

[0106] That is, compared to the power storage device 1 of the first embodiment, the power storage device 41 of the present embodiment can be configured such that the first adhesive member 5 and the second adhesive member 6 are omitted in the region where the surface pressure distribution member 42 is not arranged, for example.

[0107] In this manner, the mounting structure of the power storage device 41 in the vehicle 100 of the present embodiment arranges the surface pressure distribution member 42 away from the area where the first vehicle frame member 101a and the second vehicle frame member 101b are arranged, which do not input load from the Z-axis + side to the power storage device 41 when viewed in the Z-axis direction. Therefore, compared to the power storage device 1 of the first embodiment, the power storage device 41 of the present embodiment can be manufactured at a lower cost and can be made lighter.

[0108] <Implementation Method 3>

[0109] Figure 14 This diagram illustrates the structure of adjacent single cells in the X-axis direction in the power storage device of this embodiment. Since power storage device 51 of this embodiment has substantially the same structure as power storage device 1 of Embodiment 1 and power storage device 41 of Embodiment 2, duplicate descriptions will be omitted, and identical components will be described using the same reference numerals.

[0110] like Figure 14 As shown, the power storage device 51 of this embodiment includes a load-bearing member 53 for transmitting the load from the surface pressure dispersing member 52. The load-bearing member 53 can be formed of an adhesive member such as a hot-melt adhesive sheet having insulating and elastic properties, and is disposed, for example, between adjacent battery cells 11 in the X-axis direction to join the adjacent battery cells 11.

[0111] Moreover, if Figure 14 As shown, the end portion of the load receiving member 53 on the positive side of the Z axis contacts the surface pressure distributing member 52, enabling load to be transferred from the surface pressure distributing member 52. In this case, the end portion of the load receiving member 53 on the negative side of the Z axis may or may not contact the heat transfer member 23 disposed between the battery cells 11 and the lower case 22.

[0112] Here, for example, Figure 14 As shown, the load-bearing member 53 may include a notch 53a at the end portion on the Z-axis positive side of the load-bearing member 53 and at the end portion on the Z-axis negative side of the load-bearing member 53. The notch 53a may be configured, for example, to be substantially rectangular when viewed from the Y-axis direction, and to extend in the Y-axis direction by notching the corner portions on the Z-axis positive side and the X-axis positive side of the load-bearing member 53 and the corner portions on the Z-axis negative side and the X-axis positive side of the load-bearing member 53.

[0113] The surface pressure dispersing member 52 may be, for example, Figure 14 As shown, the ribs 52a protrude toward the Z-axis side at intervals in the X-axis direction. The ribs 52a may be configured to be substantially rectangular when viewed from the Y-axis direction and extend in the Y-axis direction when arranged between adjacent cells 11 in the X-axis direction.

[0114] like Figure 14 As shown, the Z-axis-side end of rib 52a can be inserted into the Z-axis-side notch 53a of load-receiving member 53 and contact the bottom of notch 53a. This ensures that the Z-axis-side load input can be reliably transmitted from surface pressure distribution member 52 to load-receiving member 53.

[0115] In this manner, the power storage device 51 of this embodiment can transfer the load input to the Z-axis side from the surface pressure distribution member 52 to the load receiving member 53 , thereby preventing the load input to the Z-axis side from being excessively transferred to the cell 11 .

[0116] Furthermore, the unit cells 11 adjacent to each other in the X-axis direction can be joined via the load receiving member 53 , thereby increasing the rigidity of the battery module.

[0117] The shape of the load receiving member 53 is not limited to the above-described shape, and any shape may be used as long as the load input to the Z-axis side from the surface pressure distribution member 52 can be transmitted. For example, the cutout portion 53 a may be omitted.

[0118] The shape of the surface pressure dispersing member 52 is not limited to the above-described shape, and any shape may be used as long as the load input to the Z-axis side can be transmitted to the load receiving member 53 . For example, the rib 52 a may be omitted.

[0119] <Implementation Method 4>

[0120] Figure 15 This is a YZ cross-sectional view for explaining the arrangement of the bonding member, cooling device, and battery module in the power storage device of this embodiment. Since the power storage device 61 of this embodiment has substantially the same structure as the power storage device 1 of the first embodiment, repeated description will be omitted. Figure 15 As shown, a cooling device 62 is used as a representative example of the device components.

[0121] Therefore, in the electricity storage device 61 of the present embodiment, for example, when the cooling device 62 is replaced, the electricity storage device 61 can be easily disassembled, thereby improving the maintainability of the electricity storage device 61 .

[0122] <Implementation Method 5>

[0123] Figure 16 This is a YZ cross-sectional view for explaining the arrangement of the bonding member, device components, and battery modules in the power storage device of this embodiment. Since the power storage device 71 of this embodiment has substantially the same structure as the power storage device 1 of the first embodiment, repeated description will be omitted. Figure 16 As shown, the device components 72 such as the surface pressure dispersing member and the cooling device are arranged on the − side of the Z axis with respect to the battery module 2 .

[0124] like Figure 16 As shown, device component 72 is bonded to lower case 22 via first adhesive member 73 and to battery module 2 via second adhesive member 74. A wire 75 having the same structure as wire 7 in Embodiment 1 is disposed within first adhesive member 73.

[0125] Therefore, also in the power storage device 71 of the present embodiment, the power storage device 71 can be easily disassembled, and the maintainability of the power storage device 71 can be improved.

[0126] The present disclosure is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit and scope of the present disclosure. For example, the above-described Embodiments 1 to 5 can be appropriately combined and implemented.

[0127] For example, the unit cells 11 in the above embodiment extend in the X-axis direction, but may also extend in the Y-axis direction. Furthermore, the arrangement of the first electrode terminal 13 and the second electrode terminal 14 is not limited and may be provided on any surface of the battery case 12 .

[0128] For example, in the power storage devices 1 , 41 , 51 of the above embodiments, the upper case 21 and the surface pressure distribution member 4 , 42 , 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 the present invention is not limited thereto.

[0129] That is, Figure 17 As shown, the surface pressure distribution member 81 formed in a cap shape may be joined to the upper case 21 by welding or the like. In this case, the second adhesive member 6 may be cut by the wire 7 .

[0130] For example, the arrangement and shape of the surface pressure distribution members 4, 42, 52, and 81 in the above-described embodiment are merely examples, and any arrangement and shape may be employed that can distribute the load input from the Z-axis + side to the power storage devices 1, 41, 51, etc., to each of the battery cells 11. Furthermore, the arrangement and shape of the cooling device 62 and device component 72 in the above-described embodiment are also merely examples.

[0131] In addition, for example, in the power storage device 1 of the above-mentioned embodiment, the surface pressure dispersion component and the cooling device are exemplified as device components, but as long as they are components arranged between the battery module 2 and the battery pack shell 3, the device components can also constitute part of the shell 3.

[0132] Therefore, the arrangement and shape of the first adhesive members 5, 73 and the second adhesive members 6, 74 can be appropriately changed according to the arrangement and shape of the device components and the cooling device. In addition, the arrangement and shape of the wires 7, 75 can also be appropriately changed according to the arrangement and shape of the first adhesive members 5, 73 and the second adhesive members 6, 74.

[0133] In short, the wire material only needs to be arranged and shaped to cut the adhesive member arranged between the battery module 2 and the battery pack case 3 . For example, it does not need to be arranged inside the first adhesive member 5 , 73 or the second adhesive member 6 , 74 .

[0134] As can be seen from the above disclosure, the embodiments of the present disclosure can be modified in a variety of ways. Such modifications should not be considered to depart from the spirit and scope of protection of the present disclosure, and all modifications obvious to those skilled in the art should be considered to fall within the scope of protection claimed in the claims.

Claims

1. A power storage device comprising: A battery module, comprising a plurality of single cells; a housing, the housing housing at least a portion of the battery module; a device component, the device component being located between the battery module and the housing; and an adhesive member for bonding the device component and the battery module, in, The electricity storage device includes a wire including a first portion arranged inside the electricity storage device and a second portion arranged outside the electricity storage device.

2. The power storage device according to claim 1, wherein The wire material has insulation properties.

3. The power storage device according to claim 1, wherein The first portion of the wire material includes a portion that is arranged at a position overlapping with the battery module when viewed from a direction in which the battery module and the device component are opposed.

4. The power storage device according to claim 1, wherein The first portion of the wire includes a portion fixed at a position overlapping the battery module when viewed from a direction in which the battery module and the device component are opposed.

5. The power storage device according to claim 1, wherein The first portion of the wire material includes a portion in contact with the adhesive member.

6. The power storage device according to any one of claims 1 to 5, wherein When viewed from a direction in which the battery module and the device component are opposed to each other, the first portion of the wire is bent.

7. The power storage device according to claim 6, wherein The wire material is arranged inside the bonding member.

8. The power storage device according to claim 7, wherein The device component is a surface pressure dispersion component, The adhesive member includes a first adhesive member for bonding the surface pressure distribution member to the housing and a second adhesive member for bonding the surface pressure distribution member to the battery module. The wire material is arranged inside the first adhesive member.

9. The power storage device according to claim 8, wherein The power storage device includes a load receiving member that is disposed between the adjacent unit cells and to which the load is transmitted from the surface pressure distribution member.

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

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

12. The power storage device according to any one of claims 1 to 5, wherein The unit cells include electrode terminals on at least one of a pair of facing surfaces, wherein the facing surfaces 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 any one of claims 1 to 5, wherein The device constituent component constitutes at least a portion of the housing.

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

15. The vehicle-mounted structure for an electric storage device according to claim 14, wherein: The first vehicle frame member and the second vehicle frame member are seat cross members.

16. An electric storage device comprising: A battery module, comprising a plurality of single cells; a housing that receives at least a portion of the battery module; and an adhesive component for bonding the housing and the battery module, in, The power storage device includes a wire rod, which includes a first portion arranged at a position overlapping with the battery module when viewed from a direction opposite to the shell, and a second portion arranged at a position not overlapping with the battery module when viewed from a direction opposite to the shell.

17. The power storage device according to claim 16, wherein The unit cells include electrode terminals on at least one of a pair of facing surfaces, wherein the facing surfaces face each other in a direction perpendicular to a direction in which the battery module and the case face each other.

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