Vehicle power storage device

Abstract

To obtain a vehicle power storage device capable of excellently maintaining a mounting state of a battery module in a configuration including a plurality of battery modules.SOLUTION: A vehicle power storage device 10 includes: beam-shaped members 28 extending in one direction; battery modules 36 disposed on both sides of the beam-shaped member 28 with the beam-shaped member 28 interposed therebetween; a first bracket 40 coupling a battery module 26 disposed on one side of the beam-shaped member 28 and beam-shaped member 28; and second bracket 41 coupling the battery module 36 disposed on the other side of the beam-shaped member 28 and beam-shaped member 28. The first bracket 40 and the second bracket 41 are disposed to face each other in a direction intersecting the one direction, and include load transmission portions 40B, 41B disposed at an interval along the one direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a vehicle power storage device. [Background technology]

[0002] Patent Document 1 discloses an energy storage device in which a plurality of energy storage units (battery modules) are arranged in a battery case. In the energy storage device disclosed in Patent Document 1, a plurality of beam members are arranged in the battery case, and the energy storage units are fastened to the beam members with bolts via a plurality of second members provided on the energy storage units. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-064815 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the structure disclosed in Patent Document 1, the second members are scattered on the side walls of the energy storage unit, and therefore, in the event of a vehicle collision, the load input to the second members may not be transmitted, and stress may be concentrated on the second members.

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a vehicle power storage device that includes a plurality of battery modules and that can maintain the battery modules in a good mounting state. [Means for solving the problem]

[0006] The vehicle energy storage device of claim 1 comprises a beam-shaped member extending in one direction, battery modules arranged on both sides of the beam-shaped member with the beam-shaped member sandwiched therebetween, a first bracket connecting the battery module arranged on one side of the beam-shaped member to the beam-shaped member, and a second bracket connecting the battery module arranged on the other side of the beam-shaped member to the beam-shaped member, wherein the first bracket and the second bracket are arranged opposite each other in a direction intersecting the one direction and are provided with load transmission portions arranged at intervals along the one direction.

[0007] In the vehicle energy storage device according to claim 1, battery modules are arranged on both sides of a beam-shaped member, with the beam-shaped member sandwiched between them. The battery module arranged on one side of the beam-shaped member and the beam-shaped member are connected by a first bracket, and the battery module arranged on the other side of the beam-shaped member and the beam-shaped member are connected by a second bracket. The first bracket and the second bracket are arranged facing each other in a direction intersecting the one direction. The first bracket and the second bracket also include load transmission portions arranged at intervals along the one direction. As a result, even if a collision load is input in one direction during a vehicle collision, the load transmission portions of the first bracket and the second bracket come into contact with each other, so that the collision load can be distributed and borne by the two brackets, and the brackets can be prevented from falling off the beam-shaped member.

[0008] The vehicle energy storage device of claim 2 is the same as claim 1, except that the first bracket has a first base portion extending in the one direction, the second bracket has a second base portion extending in the one direction, and the load transmission portion includes a first load transmission portion protruding from the first base portion toward the second bracket, and a second load transmission portion protruding from the second base portion toward the first bracket.

[0009] In the vehicle power storage device according to claim 2, the first bracket includes a first base portion extending in one direction and a first load transmission portion protruding from the first base portion toward the second bracket. The second bracket includes a second base portion extending in one direction and a second load transmission portion protruding from the second base portion toward the first bracket. As a result, when a collision load or the like is input in one direction and the first load transmission portion and the second load transmission portion come into contact with each other, the collision load can be transmitted to the anti-collision side via the first base portion and the second base.

[0010] The vehicle energy storage device of claim 3 is the same as claim 2, wherein a fastener for fastening the first bracket to the beam-like member is attached to the first load transmission portion, and a fastener for fastening the second bracket to the beam-like member is attached to the second load transmission portion, and the fasteners are arranged along the one direction.

[0011] In the vehicle power storage device according to claim 3, the first bracket is fastened to the beam-like member by a fastener attached to the first load transmission part, and the second bracket is fastened to the beam-like member by a fastener attached to the second load transmission part. Here, because the fasteners are arranged in one direction, when a collision load or the like is input to the first load transmission part and the second load transmission part, the collision load can be distributed to the first bracket, the second bracket, and the beam-like member via the fasteners.

[0012] The vehicle power storage device according to claim 4 is the same as claim 2 or 3, wherein the first load transmission portions and the second load transmission portions are formed in plurality at intervals along the one direction and are arranged close to each other in a staggered manner.

[0013] In the vehicle energy storage device according to claim 4, the first load transmission portion and the second load transmission portion are arranged close to each other and staggered, so that the first load transmission portion and the second load transmission portion can be brought into contact with each other immediately after a collision load is input.

[0014] The vehicle energy storage device of claim 5 is the same as claim 4, wherein the beam-shaped member, the first bracket, and the second bracket extend in the vehicle width direction, the first bracket has a protruding portion that protrudes further outward in the vehicle width direction than the battery module, and the amount of protrusion of the protruding portion relative to the battery module is set to a dimension larger than the gap in the vehicle width direction between the first load transmission portion and the second load transmission portion.

[0015] In the vehicle power storage device according to claim 5, the beam-shaped member, the first bracket, and the second bracket extend in the vehicle width direction, so that the collision load can be dispersed in the event of a side collision of the vehicle. Also, the amount of protrusion of the protruding portion relative to the battery module is set to a dimension larger than the gap between the first load transmission portion and the second load transmission portion in the vehicle width direction, so that the first load transmission portion and the second load transmission portion can come into contact with each other before an object strikes the battery module, and the collision load can be borne early. [Effects of the Invention]

[0016] As described above, the vehicle power storage device according to the present invention can maintain a good mounting state of the battery modules in a configuration including a plurality of battery modules. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a perspective view showing a main part of a vehicle equipped with a vehicle power storage device according to an embodiment; [Figure 2] 1 is an exploded perspective view showing a vehicle power storage device according to an embodiment; [Figure 3] FIG. 3 is a cross-sectional view showing a state cut along line 3-3 in FIG. 2. [Figure 4] 1 is a plan view of a vehicle power storage device according to an embodiment of the present invention; [Figure 5] FIG. 5 is an enlarged view of a main part of FIG. 4. [Figure 6] 6 is an enlarged view of a main part corresponding to FIG. 5, showing a bracket in a first modified example. FIG. [Figure 7] 6 is an enlarged view of a main part corresponding to FIG. 5, showing a bracket in a second modified example. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0018] A vehicle power storage device 10 according to an embodiment will be described with reference to the drawings. Note that arrows UP, FR, and RH shown as appropriate in each drawing respectively indicate the upward direction in the vehicle vertical direction, the forward direction in the vehicle longitudinal direction, and the right direction in the vehicle lateral direction (vehicle width direction) of a vehicle V equipped with the vehicle power storage device 10. Furthermore, in the following description, when the directions up / down, front / rear, and left / right are simply used, they will respectively indicate front / rear in the vehicle longitudinal direction, up / down in the vehicle vertical direction, and left / right in the vehicle lateral direction (vehicle width direction), unless otherwise specified.

[0019] Fig. 1 is a perspective view showing a main part of a vehicle V equipped with a vehicle power storage device 10 according to an embodiment. As shown in Fig. 1, a pair of left and right rockers 12 are provided in the center of the vehicle V in the vehicle longitudinal direction. Each of the rockers 12 extends in the vehicle longitudinal direction and constitutes a skeletal member with a closed cross-sectional structure.

[0020] The front ends of the rockers 12 are connected by a front cross member 14 extending in the vehicle width direction. The rear ends of the rockers 12 are connected by a rear cross member 16 extending in the vehicle width direction, so that the longitudinal center portion of the vehicle V is formed into a substantially rectangular frame shape in plan view by the rockers 12, the front cross member 14, and the rear cross member 16.

[0021] A front module FM that constitutes a power unit compartment is provided further forward of the rocker 12, and a rear module RM that constitutes the rear of the vehicle V is provided further rearward of the rocker 12. Details of the front module FM and the rear module RM will not be explained here. The front module FM and the rear module RM may each be formed by welding a plurality of skeletal members together, or some of the skeletal members may be formed integrally by casting or the like.

[0022] Here, a vehicle power storage device 10 is provided within a frame formed by the rocker 12, the front cross member 14, and the rear cross member 16. The vehicle power storage device 10 is configured to be able to store electric power to be supplied to a motor that is a drive source of the vehicle V. Note that the vehicle V in this embodiment is an electric vehicle (BEV: Battery Electric Vehicle), which runs on power generated by a power unit, a fuel cell electric vehicle (FCEV: Fuel Cell Electric Vehicle), a hybrid vehicle (HEV: Hybrid Electric Vehicle), a plug-in hybrid electric vehicle (PHEV: Plug-in Hybrid Electric Vehicle), or the like.

[0023] 2 is an exploded perspective view showing a vehicle power storage device 10 according to an embodiment. The vehicle power storage device 10 of this embodiment includes, as an example, a battery case 20. The battery case 20 is formed in a substantially rectangular box shape in a plan view, and includes a front wall portion 20A extending in the vehicle width direction in front of the vehicle, a rear wall portion 20B extending in the vehicle width direction in the vehicle rear of the vehicle, and a pair of side wall portions 20C connecting both end portions of the front wall portion 20A and the rear wall portion 20B in the front-rear direction.

[0024] Two cross-side brackets 22 are provided on the front surface of the front wall portion 20A, spaced apart in the vehicle width direction. Each cross-side bracket 22 is formed in a substantially L-shape when viewed in the vehicle width direction, and a portion extending in the vehicle vertical direction is fixed to the front wall portion 20A. In addition, a portion of the cross-side bracket 22 extending in the vehicle longitudinal direction is fixed to the lower surface of the front cross member 14 (see FIG. 1).

[0025] A rocker-side bracket 24 is provided on the side wall 20C of the battery case 20. The rocker-side bracket 24 is formed to have approximately the same length as the side wall 20C, extends in the vehicle longitudinal direction, and is formed in a substantially L-shape when viewed from the vehicle longitudinal direction. The portions of the rocker-side bracket 24 that extend in the vertical direction are fixed to the side wall 20C. The portion of the rocker-side bracket 24 that extends in the vehicle width direction is fixed to the underside of the rocker 12 (see FIG. 1).

[0026] Here, the bottom wall of the battery case 20 is provided with a plurality of vertical reinforcements 26 extending in the vehicle longitudinal direction, and a plurality of horizontal reinforcements 28 as beam-shaped members extending in the vehicle width direction (one direction).

[0027] Two vertical reinforcements 26 are provided at a distance apart in the vehicle width direction in the front part of the battery case 20, and two are provided at a distance apart in the vehicle width direction in the rear part of the battery case 20. In addition, two vertical reinforcements 26 are also provided at a distance apart in the vehicle width direction in the central part of the battery case 20 in the vehicle front-rear direction.

[0028] The lateral reinforcements 28 are provided at positions that divide the battery case 20 into three equal parts in the vehicle longitudinal direction. Specifically, the lateral reinforcement 28 provided on the front side is provided between the front vertical reinforcement 26 and the central vertical reinforcement 26. Furthermore, the lateral reinforcement 28 provided on the rear side is provided between the central vertical reinforcement 26 and the rear vertical reinforcement 26. Furthermore, each of the two lateral reinforcements 28 is formed to be longer in the vehicle vertical direction than the vertical reinforcement 26.

[0029] 1, the battery case 20 includes a cover 30, and a battery pack 34 is housed inside the battery case 20. In addition, devices 32 are provided on the upper surface of the cover 30 at the rear of the battery case 20. The devices 32 include, for example, an ECU (Electronic Control Unit), a BMS (Battery Management System), and a JB (Junction Box).

[0030] 2, the battery pack 34 is configured to include a plurality of battery modules 36. In the present embodiment, as an example, the battery pack 34 is configured to include 18 battery modules 36. Each battery module 36 is modularized in a state where a plurality of cells are stacked.

[0031] Six battery modules 36 are housed in the area surrounded by the front wall 20A, the front lateral reinforcement 28, and the side wall 20C of the battery case 20. Six battery modules 36 are also housed in the area surrounded by the front and rear lateral reinforcements 28 and the side wall 20C. Furthermore, six battery modules 36 are housed in the area surrounded by the rear wall 20B, the rear lateral reinforcement 28, and the side wall 20C. In this way, the battery modules 36 are arranged on both the front and rear sides of the lateral reinforcement 28, with the lateral reinforcement 28 in between.

[0032] Here, the multiple battery modules 36 are connected in the vehicle width direction by a front mounting bracket 40 and a rear mounting bracket 41. The front mounting bracket 40 is attached to the front end of the battery module 36, and the rear mounting bracket 41 is attached to the rear end of the battery module 36. Furthermore, the battery modules 36 arranged one above the other are connected by the front mounting bracket 40 and the rear mounting bracket 41. In other words, a structure is formed in which six battery modules 36 are connected by the front mounting bracket 40 and the rear mounting bracket 41. The front mounting bracket 40 and the rear mounting bracket 41 will be described in detail later.

[0033] 3 is a cross-sectional view taken along line 3-3 in FIG. 2. As shown in FIG. 3, a reinforcing portion 21 having a generally L-shaped cross section is provided inside the battery case 20. The reinforcing portion 21 extends in the vehicle front-rear direction and is joined to the bottom and side wall portions 20C of the battery case 20. The bottom and side wall portions 20C of the battery case 20 and the reinforcing portion 21 form a closed cross section. Note that while FIG. 3 only shows the reinforcing portion 21 on the right side of the vehicle, a similar reinforcing portion is also provided on the left side of the vehicle.

[0034] Here, the lateral reinforcement 28 is installed between the reinforcing portions 21. That is, the right end portion of the lateral reinforcement 28 is joined to the reinforcing portion 21 on the right side, and the left end portion of the lateral reinforcement 28 is joined to the reinforcing portion 21 on the left side.

[0035] A weld nut 42 is provided inside the lateral reinforcement 28, and a bolt 44 serving as a fastener is threaded into the weld nut 42. The bolt 44 is inserted into the front mounting bracket 40 from above the vehicle, passes through the front mounting bracket 40, and is threaded into the weld nut 42. In this manner, the front mounting bracket 40 is fastened to the lateral reinforcement 28. Although not shown, the rear mounting bracket 41 is also fastened to the lateral reinforcement 28 by a bolt and a weld nut in a similar manner.

[0036] The front mounting bracket 40 extends in the vehicle width direction, and the right end of the front mounting bracket 40 is located to the right of the rightmost battery module 36. Although not shown, the left end of the front mounting bracket 40 is located to the left of the leftmost battery module 36. For this reason, the front mounting bracket 40 is structured to protrude further in the vehicle width direction than the battery pack 34.

[0037] An impact absorbing member 45 is disposed further outward in the vehicle width direction than the rocker 12. Although a cross section of the impact absorbing member 45 is not shown, the impact absorbing member 45 has a shape that is divided into multiple internal spaces so that it can deform when a collision load is input and absorb the collision load. The impact absorbing member 45 extends in the front-to-rear direction of the vehicle adjacent to the rocker 12, and the upper surface of the impact absorbing member 45 is set at a position higher than the lateral reinforcement 28. Therefore, when viewed from the vehicle width direction, the upper part of the impact absorbing member 45 overlaps with the front mounting bracket 40.

[0038] 4 is a plan view of the vehicle energy storage device 10 according to the embodiment. As shown in this Fig. 4, a front mounting bracket 40 is attached to the front end of the battery module 36, and a rear mounting bracket 41 is attached to the rear end of the battery module 36.

[0039] Here, of the battery modules 36 adjacent in the vehicle longitudinal direction with the lateral reinforcement 28 sandwiched between them, the front mounting bracket 40 of the battery module 36 arranged on the rear side corresponds to the "first bracket" in the present invention. Also, the rear mounting bracket 41 of the battery module 36 arranged on the front side corresponds to the "second bracket" in the present invention. The front mounting bracket 40 and the rear mounting bracket 41 are formed to have the same shape, and the front mounting bracket 40 is attached to the battery module 36 by flipping it 180 degrees in a plan view to form the rear mounting bracket 41.

[0040] The front mounting bracket 40 includes a base portion 40A and a load transmission portion 40B, which correspond to the "first base portion" and the "first load transmission portion" in the present invention. The rear mounting bracket 41 includes a base portion 41A and a load transmission portion 41B, which correspond to the "second base portion" and the "second load transmission portion" in the present invention.

[0041] The base portion 40A extends in the vehicle width direction, with a portion of the base portion 40A fitting between the upper and lower battery modules 36. Bolts 46 are inserted into the front corners of the upper battery module 36, and these bolts 46 are screwed into the base portion 40A, thereby fastening the upper battery module 36 to the front mounting bracket 40. Bolts 46 are also inserted into the rear corners of the upper battery module 36, and these bolts 46 are screwed into the base portion 41A, thereby fastening the upper battery module 36 to the rear mounting bracket 41.

[0042] The battery module 36 arranged on the lower side has bolts (not shown) inserted into its four corners, just like the upper battery module 36, and the bolts are screwed into the base portion 40A and base portion 41A from below, thereby fastening the lower battery module 36 to the front mounting bracket 40 and rear mounting bracket 41.

[0043] Furthermore, vertical fixing portions 40C protrude from the base portion 40A of the front mounting bracket 40 toward between adjacent battery modules 36. The vertical fixing portions 40C are provided between the right-side battery module 36 and the central battery module 36, and between the left-side battery module 36 and the central battery module 36, respectively, and extend from the base portion 40A toward the rear of the vehicle. The vertical fixing portions 40C are fastened to the vertical reinforcement 26 with bolts (not shown).

[0044] Vertical fixing portions 41C similar to the vertical fixing portions 40C are provided on the base portion 41A of the rear mounting bracket 41. The vertical fixing portions 41C are provided between the right-side battery module 36 and the central battery module 36, and between the left-side battery module 36 and the central battery module 36, respectively, and extend from the base portion 41A toward the front of the vehicle. The vertical fixing portions 41C are fastened to the vertical reinforcement 26 with bolts (not shown).

[0045] In this way, the lateral reinforcement 28 and the vertical reinforcement 26 are connected by the base portion 40A of the front mounting bracket 40, and the lateral reinforcement 28 and the vertical reinforcement 26 are connected by the base portion 41A of the rear mounting bracket 41. This reinforces the bottom of the battery case 20, improving its strength against vibrations from the road surface.

[0046] Here, the front mounting bracket 40 is provided with a plurality of load transmission portions 40B that protrude from the base portion 40A toward the rear mounting bracket 41. In this embodiment, as an example, six load transmission portions 40B are provided on the front mounting bracket 40. The load transmission portions 40B are arranged at intervals along the vehicle width direction, and in this embodiment, as an example, the load transmission portions 40B are provided at positions corresponding to corners of the battery module 36.

[0047] The rear mounting bracket 41 is provided with a plurality of load transmission portions 41B that protrude from the base portion 41A toward the front mounting bracket 40. In this embodiment, as an example, the rear mounting bracket 41 is provided with six load transmission portions 41B.

[0048] The load transmission portion 40B and the load transmission portion 41B will be described in detail below. Fig. 5 is an enlarged view of the main portion of Fig. 4. As shown in Fig. 5, the load transmission portion 40B provided on the front mounting bracket 40 has a tip formed in a substantially arc shape in a plan view. The outer edge on the right side of the load transmission portion 40B extends in the vehicle longitudinal direction, and the outer edge on the left side is inclined so as to be positioned to the right as it moves from the rear of the vehicle to the front of the vehicle. The tip of the load transmission portion 40B is fastened to the lateral reinforcement 28 by a bolt 44.

[0049] The load transmission portion 41B provided on the rear mounting bracket 41 has a tip formed in a substantially arc shape in a plan view. The left outer edge of the load transmission portion 41B extends in the vehicle front-to-rear direction, and the right outer edge is inclined so as to be positioned leftward as it moves from the front of the vehicle to the rear of the vehicle. The tip of the load transmission portion 41B is fastened to the lateral reinforcement 28 with a bolt 44.

[0050] Here, the load transmission portion 40B of the front mounting bracket 40 and the load transmission portion 41B of the rear mounting bracket 41 are disposed close to each other and alternately. Specifically, from the left side, the load transmission portion 41B and the load transmission portion 40B are disposed alternately.

[0051] In addition, the left outer edge of the load transmission part 40B and the right outer edge of the load transmission part 41B are arranged close to each other, and are configured to come into surface contact when a load is input in the vehicle width direction.

[0052] Furthermore, the bolts 44 that fasten the load transmission portion 40B and the bolts 44 that fasten the load transmission portion 41B are arranged in a substantially straight line along the vehicle width direction.

[0053] (action) Next, the operation of the vehicle power storage device 10 according to this embodiment will be described.

[0054] 2, in the vehicle energy storage device 10 according to this embodiment, battery modules 36 are arranged on both the front and rear sides of a lateral reinforcement 28, which is a beam-shaped member. The battery module 36 arranged on one side of the lateral reinforcement 28 and the lateral reinforcement 28 are connected by a front mounting bracket 40, which is a first bracket. The battery module 36 arranged on the other side of the lateral reinforcement 28 and the lateral reinforcement 28 are connected by a rear mounting bracket 41, which is a second bracket.

[0055] 5, the front mounting bracket 40 and the rear mounting bracket 41 are disposed opposite each other in the vehicle longitudinal direction, which intersects with the vehicle width direction. Furthermore, the front mounting bracket 40 and the rear mounting bracket 41 are provided with load transmission portions 40B, 41B spaced apart along the vehicle width direction. Even if a collision load is input in the vehicle width direction during a collision of the vehicle V, the load transmission portion 40B of the front mounting bracket 40 and the load transmission portion 41B of the rear mounting bracket 41 come into contact with each other, so that the collision load can be distributed and borne by the two brackets, preventing the battery module 36 from falling off the lateral reinforcement 28. As a result, the battery modules 36 can be maintained in a good mounting state in a configuration including multiple battery modules 36.

[0056] In this embodiment, the front mounting bracket 40 includes a base portion 40A extending in one direction and a load transmission portion 40B protruding from the base portion 40A toward the rear mounting bracket 41. The rear mounting bracket 41 includes a base portion 41A extending in one direction and a load transmission portion 41B protruding from the base portion toward the front mounting bracket 40. As a result, when a collision load or the like is input in one direction and the load transmission portion 40B comes into contact with the load transmission portion 40B, the collision load can be transmitted to the anti-collision side via the front mounting bracket 40 and the rear mounting bracket 41.

[0057] Furthermore, in this embodiment, the front mounting bracket 40 is fastened to the lateral reinforcement 28 by bolts 44 attached to the front mounting bracket 40, and the rear mounting bracket 41 is fastened to the lateral reinforcement 28 by bolts 44 attached to the rear mounting bracket 41. Here, because the bolts 44 are arranged along the vehicle width direction in plan view, when a collision load or the like is input to the load transmission parts 40B and 41B, the collision load can be distributed to the front mounting bracket 40, the rear mounting bracket 41, and the lateral reinforcement 28 via the bolts 44.

[0058] Furthermore, in this embodiment, the load transmission portion 40B of the front mounting bracket 40 and the load transmission portion 41B of the rear mounting bracket 41 are positioned close to each other but different from each other, so that the load transmission portion 40B and the load transmission portion 41B can come into contact with each other immediately after the collision load is input.

[0059] In this embodiment, the inclined surfaces of the load transmitting portions 40B and 41B are configured to face each other in the vehicle width direction, but this is not limiting. For example, modified configurations shown in Figures 6 and 7 may be employed.

[0060] (First Modification) Fig. 6 is an enlarged view of a main portion corresponding to Fig. 5 and shows a bracket in a first modified example. As shown in Fig. 6, a front mounting bracket 62 constituting a vehicle power storage device 60 in this modified example is configured to include a base portion 62A and a load transmission portion 62B, where the base portion 62A and the load transmission portion 62B correspond to the "first base portion" and the "first load transmission portion" in the present invention. Further, a rear mounting bracket 64 is configured to include a base portion 64A and the load transmission portion 64B, where the base portion 64A and the load transmission portion 64B correspond to the "second base portion" and the "second load transmission portion" in the present invention.

[0061] Here, in this modified example, the shapes of the load transmission portions 62B and 64B are different from those of the embodiment. Specifically, the load transmission portions 62B of the front mounting bracket 62 are formed in the same shape except for the rightmost load transmission portion 62B, and the right outer edge and the left outer edge extend in the vehicle longitudinal direction. Furthermore, the load transmission portions 64B of the rear mounting bracket 64 are formed in the same shape as the load transmission portions 62B except for the leftmost load transmission portion 64B, and the left and right outer edges extend in the vehicle longitudinal direction substantially parallel to the load transmission portions 62B.

[0062] Furthermore, the load transmission portion 64B located at the leftmost position of the vehicle includes a protruding portion 64C, which protrudes further to the left side of the vehicle than the other load transmission portions 64B.

[0063] Here, the amount of protrusion L1 by which the load transmission part 64B located on the leftmost side of the vehicle protrudes further to the left side of the vehicle than the battery module 36 is set to a dimension larger than the gap L2 in the vehicle width direction between the load transmission part 62B and the load transmission part 64B.

[0064] In this embodiment, the protrusion amount L1 of the protrusion 64C relative to the battery module 36 is set to a dimension larger than the gap L2 in the vehicle width direction between the load transmission portion 62B and the load transmission portion 64B, so that the load transmission portion 62B and the load transmission portion 64B can come into contact with each other before the colliding object hits the battery module 36, and the collision load can be borne early.

[0065] (Second Modification) Fig. 7 is an enlarged view of a main portion corresponding to Fig. 5 and shows a bracket in a second modified example. As shown in Fig. 7, a front mounting bracket 72 constituting a vehicle power storage device 70 of this modified example is configured to include a base portion 72A and a load transmission portion 72B, and the base portion 72A and the load transmission portion 72B correspond to the "first base portion" and the "first load transmission portion" in the present invention. Furthermore, a rear mounting bracket 74 is configured to include a base portion 74A and the load transmission portion 74B, and the base portion 74A and the load transmission portion 74B correspond to the "second base portion" and the "second load transmission portion" in the present invention.

[0066] Here, in this modified example, the load transmission portion 74B of the rear mounting bracket 74 has a wedge-shaped portion 74C. Also, the load transmission portion 72B of the front mounting bracket 72 has a recessed portion that is recessed in a shape corresponding to the wedge-shaped portion 74C.

[0067] In this modified example, in the event of a side collision of the vehicle, the wedge-shaped portion 74C of the load transmission portion 74B fits into the recess of the load transmission portion 72B, thereby more effectively transmitting the collision load between the front mounting bracket 72 and the rear mounting bracket 74.

[0068] Although the vehicle power storage devices 10, 60, and 70 according to the embodiments and modifications have been described above, the present invention is not limited thereto and can be embodied in various forms without departing from the spirit of the present invention. For example, in the above-described embodiments, as shown in FIG. 2, two battery modules 36 are connected vertically, but the present invention is not limited thereto. Also, although three battery modules 36 are connected horizontally, the present invention is not limited thereto.

[0069] In the above embodiment, as shown in Fig. 4, the front mounting bracket 40 and the rear mounting bracket 41 are each formed from a single component extending in the vehicle width direction, but this is not limiting. For example, the mounting brackets may be formed by mechanically connecting multiple components.

[0070] Furthermore, in the above embodiment, the front mounting bracket 40 and the rear mounting bracket 41 are attached to the lateral reinforcement 28 extending in the vehicle width direction, but this is not limiting. For example, mounting brackets extending in the vehicle longitudinal direction may be prepared and attached to the vertical reinforcement. In this case, the load transmission parts are arranged at intervals in the vehicle longitudinal direction, and contact between the load transmission parts during a frontal or rear-end collision of the vehicle prevents the battery module from falling off.

[0071] The following notes are provided regarding the above embodiment.

[0072] (Appendix 1) a first bracket connecting the battery module arranged on one side of the beam member to the beam member; and a second bracket connecting the battery module arranged on the other side of the beam member to the beam member, wherein the first bracket and the second bracket are arranged opposite each other in a direction intersecting the one direction and are provided with load transmission parts arranged at intervals along the one direction. (Appendix 2) The vehicle energy storage device described in Appendix 1, wherein the first bracket has a first base portion extending in the one direction, the second bracket has a second base portion extending in the one direction, and the load transmission portion includes a first load transmission portion protruding from the first base portion toward the second bracket, and a second load transmission portion protruding from the second base portion toward the first bracket. (Appendix 3) A vehicle energy storage device as described in Appendix 2, wherein a fastener for fastening the first bracket to the beam-like member is attached to the first load transmission portion, and a fastener for fastening the second bracket to the beam-like member is attached to the second load transmission portion, and the fasteners are arranged along the one direction. (Appendix 4) The vehicle power storage device according to claim 2 or 3, wherein the first load transmission portion and the second load transmission portion are formed in plurality at intervals along the one direction and are arranged close to each other in a staggered manner. (Appendix 5) The vehicle energy storage device according to any one of Appendix 2 to Appendix 4, wherein the beam-shaped member, the first bracket, and the second bracket extend in the vehicle width direction, the first bracket has a protruding portion that protrudes further outward in the vehicle width direction than the battery module, and the amount of protrusion of the protruding portion relative to the battery module is set to a dimension that is larger than the gap in the vehicle width direction between the first load transmission portion and the second load transmission portion. [Explanation of symbols]

[0073] 10, 60, 70 Vehicle power storage device 28 Lateral reinforcement (beam-like member) 36 Battery Module 40, 62, 64 Front mounting bracket (first bracket) 40A, 62A, 72A Base part (first base part) 40B, 62B, 72B Load transmission part (first load transmission part) 41, 64, 74 Rear mounting bracket (second bracket) 41A, 64A, 74A base part (second base part) 41B, 64B, 74B Load transmission part (second load transmission part) 44 Bolts (fasteners)

Claims

1. a beam-like member extending in one direction; battery modules disposed on both sides of the beam-shaped member with the beam-shaped member interposed therebetween; a first bracket that connects the battery module disposed on one side of the beam-shaped member to the beam-shaped member; a second bracket that connects the battery module disposed on the other side of the beam-shaped member to the beam-shaped member; and the first bracket and the second bracket are disposed opposite to each other in a direction intersecting the one direction and include load transmission portions disposed at intervals along the one direction. Vehicle power storage device.

2. the first bracket includes a first base portion extending in the one direction, the second bracket includes a second base portion extending in the one direction, The load transmission portion includes a first load transmission portion that protrudes from the first base portion toward the second bracket, and a second load transmission portion that protrudes from the second base portion toward the first bracket. The vehicle power storage device according to claim 1 .

3. a fastener for fastening the first bracket to the beam-like member is attached to the first load transmission portion; a fastener for fastening the second bracket to the beam-like member is attached to the second load transmission portion; The fasteners are arranged along the one direction. The vehicle power storage device according to claim 2 .

4. The first load transmission portion and the second load transmission portion are formed in plurality at intervals along the one direction and are arranged close to each other in a staggered manner. The vehicle power storage device according to claim 2 or 3.

5. the beam-like member, the first bracket, and the second bracket extend in a vehicle width direction, the first bracket includes a protruding portion that protrudes outward in a vehicle width direction beyond the battery module; a protrusion amount of the protrusion with respect to the battery module is set to a dimension larger than a gap between the first load transmission portion and the second load transmission portion in the vehicle width direction; The vehicle power storage device according to claim 4.

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