Battery mounting structure

Abstract

To obtain a battery mounting structure capable of improving productivity. [Solution] A battery case 32 is disposed between a pair of left and right rockers 36 that constitute part of a center frame 34 of a center module 16. An inner flange 48 protrudes from an inner wall 36B of the rocker 36, and an outer flange 50 protrudes from an outer wall 36A of the battery case 32. The outer flange 50 and the inner flange 48 are fixed in a state where they overlap in the vertical direction of the vehicle. Therefore, compared to a comparative example in which weld nuts or the like are provided to fasten the battery case 32 within the rocker 36, productivity can be improved since these are not necessary.

Description

[Technical Field]

[0001] The present invention relates to a battery mounting structure. [Background technology]

[0002] For example, Patent Document 1 below discloses a technology for fastening a battery to a frame that surrounds the battery in a battery mounting structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] WO2020 / 044792 publication Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above prior art, it is necessary to provide a weld nut or the like for fastening the battery case inside the locker, which results in poor productivity.

[0005] In consideration of the above, an object of the present invention is to provide a battery mounting structure that can improve productivity. [Means for solving the problem]

[0006] The battery mounting structure of the present invention described in claim 1 comprises a pair of left and right rockers extending along the fore-and-aft direction of the vehicle on both outer sides in the vehicle width direction, and a battery case arranged between the pair of left and right rockers and containing a battery inside, and is configured to include a pair of left and right fixed pieces that protrude from the inner parts of the pair of left and right rockers in the vehicle width direction in directions approaching each other, and a pair of left and right fixing pieces that protrude from both outer parts in the vehicle width direction of the battery case and are fixed in a state where they overlap the pair of left and right fixed pieces in the vertical direction of the vehicle.

[0007] The battery mounting structure of the present invention described in claim 1 includes a pair of left and right rockers and a battery case. The pair of left and right rockers extend along the front-rear direction of the vehicle on both outer sides in the vehicle width direction, and the battery case containing the battery is disposed between the pair of left and right rockers.

[0008] In this way, in the present invention, the fixed piece protrudes from the inner part of the rocker in the vehicle width direction and is fixed in a state where it overlaps with the fixing piece protruding from the outer part of the battery case in the vehicle width direction in the vertical direction of the vehicle. Therefore, there is no need to provide weld nuts or the like to fasten (fix) the battery case within the rocker, which makes it possible to improve productivity. [Effects of the Invention]

[0009] As described above, the battery mounting structure of the present invention can improve productivity. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view showing the configuration of a vehicle to which a battery mounting structure according to an embodiment of the present invention is applied; [Figure 2] 1 is a perspective view showing a vehicle to which a battery mounting structure according to an embodiment of the present invention is applied. [Figure 3] FIG. 3 is a schematic end view taken along line AA in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0011] A battery mounting structure according to one embodiment of the present invention will be described with reference to the drawings. In these drawings, the arrow FR indicates the front side of the vehicle, the arrow UP indicates the upper side of the vehicle, and the arrow RH indicates the right side in the vehicle width direction. Furthermore, unless otherwise specified, when the front-rear, up-down, and left-right directions are used in the following description, they refer to the front and rear in the front-rear direction of the vehicle, the up-down in the up-down direction of the vehicle, and the left and right in the left-right direction (width direction) of the vehicle, respectively.

[0012] <Battery mounting structure configuration> First, a vehicle to which the battery mounting structure according to this embodiment is applied will be described.

[0013] Fig. 1 shows an exploded perspective view of a vehicle 12 to which a battery mounting structure 10 according to this embodiment is applied. In this embodiment, as shown in Fig. 1, the vehicle 12 is divided into a front portion of the vehicle (hereinafter referred to as a "front module") 14, a central portion of the vehicle (hereinafter referred to as a "center module") 16, and a rear portion of the vehicle (hereinafter referred to as a "rear module") 18.

[0014] (front module) In this embodiment, for example, the front module 14 is configured to include a pair of left and right wheel arches 22 that can accommodate the front wheels 20, and a cross member 24 that extends in the vehicle width direction and connects the pair of left and right wheel arches 22.

[0015] The wheel arch 22 and the cross member 24 are integrally molded (integrated) by die-casting using an aluminum alloy, a magnesium alloy, or the like. In addition to metal, the wheel arch 22 and the cross member 24 may also be integrally molded using a resin such as carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GFRP).

[0016] (rear module) In this embodiment, for example, the rear module 18 is configured to include a pair of left and right wheel arches 28 that can accommodate rear wheels 26, and a pair of cross members 30 that extend in the vehicle width direction, connect the pair of left and right wheel arches 28, and are arranged at the front and rear of the vehicle.

[0017] The wheel arch 22 and the cross member 30 are integrally molded by die casting using an aluminum alloy, a magnesium alloy, or the like. Alternatively, they may be integrally molded using a resin such as CFRP.

[0018] (Center module) In this embodiment, for example, the center module 16 includes a battery case 32. The battery case 32 is made of a light metal such as an aluminum alloy and has a rectangular plate shape with its longitudinal direction extending in the front-to-rear direction of the vehicle in a plan view. An auxiliary section 33, in which auxiliary components (not shown) are arranged, is protruded from the rear end of the battery case 32 along the vehicle width direction.

[0019] The battery case 32 is supported by a center frame 34. The center frame 34 has, for example, a rectangular frame shape with the longitudinal direction in the vehicle front-rear direction in a plan view, and is integrally configured (integrated) including a pair of left and right rockers 36 extending in the vehicle front-rear direction on both vehicle widthwise outer sides of the battery case 32, a front cross member 38 connecting the front ends of the pair of left and right rockers 36, and a rear cross member 40 connecting the rear ends of the pair of left and right rockers 36. The center frame 34 is also provided with a pair of center cross members 42 arranged at the front and rear of the vehicle, extending along the vehicle width direction in the center of the vehicle front-rear direction.

[0020] The center frame 34 is formed by extrusion molding or the like using an aluminum alloy, a magnesium alloy, or the like material. It may also be formed from a resin other than metal, such as CFRP.

[0021] In this embodiment, a connecting portion 44 is provided at the front end of the center frame 34, and the front module 14 is connected to the front end of the center frame 34 via this connecting portion 44. Furthermore, a connecting portion 46 is provided at the rear end of the center frame 34, and the rear module 18 is connected to the rear end of the center frame 34 via this connecting portion 46.

[0022] (Battery mounting structure configuration) Here, the configuration of the battery mounting structure in this embodiment will be described.

[0023] In this embodiment, as shown in FIG. 3(A), the rockers 36 that form part of the center frame 34 of the center module 16 are, for example, cylindrical and include an outer wall portion 36A, an inner wall portion (inner portion) 36B, an upper wall portion 36C, and a lower wall portion 36D.

[0024] The outer wall portion 36A forms the outer side of the rocker 36 in the vehicle width direction, and the inner wall portion 36B forms the inner side of the rocker 36 in the vehicle width direction and is disposed opposite the outer wall portion 36A. The upper wall portion 36C forms the upper end portion of the rocker 36 and connects the upper ends of the outer wall portion 36A and the inner wall portion 36B. The lower wall portion 36D forms the lower end portion of the rocker 36 and connects the lower ends of the outer wall portion 36A and the inner wall portion 36B and is disposed opposite the upper wall portion 36C.

[0025] In this embodiment, an inner flange (fixed piece) 48 protrudes inward in the vehicle width direction from approximately the center in the vehicle up-down direction of the inner wall portion 36B of the rocker 36. Meanwhile, an outer flange (fixed piece) 50 protrudes outward in the vehicle width direction from approximately the center in the vehicle up-down direction of the outer wall portion (outer portion) 32A of the battery case 32 in the vehicle width direction. As shown in Fig. 3(B) , the outer flange 50 overlaps below the inner flange 48, so that the outer flange 50 and the inner flange 48 can be fastened (fixed).

[0026] For example, although not shown, fastening holes are formed in the inner flange 48 and the outer flange 50 in the longitudinal direction of the vehicle, stud bolts are provided on the inner flange 48 corresponding to the fastening holes, and fastening bolts are inserted from the outer flange 50 and fastened via the stud bolts. In this state, at least a portion of the battery case 32 overlaps with the rocker 36 in a side view of the vehicle.

[0027] <Actions and effects of the battery mounting structure> Next, the operation and effects of the battery mounting structure according to this embodiment will be described.

[0028] In this embodiment, as shown in Fig. 2, the battery case 32 is disposed between a pair of left and right rockers 36 that form part of the center frame 34 of the center module 16. As shown in Fig. 3(A), in this embodiment, an inner flange 48 protrudes from the inner wall portion 36B of the rocker 36, and an outer flange 50 protrudes from the outer wall portion 36A of the battery case 32. Then, as shown in Fig. 3(B), the outer flange 50 and the inner flange 48 are fixed in a state where they overlap in the vertical direction of the vehicle.

[0029] Therefore, in this embodiment, as a comparative example (not shown), productivity can be improved by eliminating the need for weld nuts or the like to fasten the battery case 32 within the locker 36.

[0030] In this embodiment, the inner flange 48 protrudes from approximately the center, in the vertical direction of the vehicle, of the inner wall portion 36B of the rocker 36, and the outer flange 50 protrudes from approximately the center, in the vertical direction of the vehicle, of the outer wall portion 36A of the battery case 32. With the outer flange 50 and the inner flange 48 overlapping and fixed in the vertical direction of the vehicle, at least a portion of the battery case 32 overlaps with the rocker 36 in a side view of the vehicle.

[0031] As a result, in this embodiment, it is possible to improve the side collision performance of the battery case 32. Therefore, it is not necessary to provide a cross member to the battery case 32 itself to improve its rigidity, and it is therefore possible to increase the battery capacity accordingly.

[0032] Furthermore, in this embodiment, an inner flange 48 is provided on the rocker 36, an outer flange 50 is provided on the battery case 32, and the inner flange 48 and the outer flange 50 are overlapped and fixed to each other. That is, in this embodiment, a gap of at least the size of the outer flange 50 is created between the inner wall portion 36B of the rocker 36 and the outer wall portion 36A of the battery case 32, making it possible to improve the cooling performance of the battery case 32.

[0033] In addition, in this embodiment, the outer flange 50 of the battery case 32 is fastened to the inner flange 48 of the rocker 36 of the center frame 34 by overlapping it from below, so the battery case 32 can be attached and detached from below.

[0034] 1 and 2, in this embodiment, a connecting portion 44 is provided at the front end of the center frame 34, and the front module 14 is connected to the front end of the center frame 34 via this connecting portion 44. In addition, a connecting portion 46 is provided at the rear end of the center frame 34, and the rear module 18 is connected to the rear end of the center frame 34 via this connecting portion 46.

[0035] In this embodiment, the front module 14 and the rear module 18 are each molded as a single unit, which allows for improved rigidity compared to when the front module 14 and the rear module 18 are made up of multiple members. By joining the front module 14 and the rear module 18, which have improved rigidity, to the center frame 34, the rigidity of the center module 16 can be improved.

[0036] Although one example of the present invention has been described above, the present invention is not limited to the above, and it goes without saying that the present invention can be implemented in various modified forms within the scope of the gist of the present invention. [Explanation of symbols]

[0037] 10 Battery mounting structure 12 vehicles 32 Battery case 32A External wall part (outside part) 36 Rocca 36B Inner wall part (inner part) 48 Inner flange (fixed piece) 50 Outer flange (fixing piece)

Claims

[Claim 1] a pair of left and right rockers extending along the front-rear direction of the vehicle on both outer sides in the vehicle width direction; a battery case disposed between the pair of left and right rockers and accommodating a battery therein; Equipped with a pair of left and right fixed pieces respectively protruding in directions approaching each other from inner portions of the pair of left and right rockers in the vehicle width direction; a pair of left and right fixing pieces that protrude from both outer sides of the battery case in the vehicle width direction and are fixed to the pair of left and right fixed pieces in a state where they overlap each other in the vehicle up-down direction; a battery mounting structure comprising:

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