Battery mounting structure for frame vehicles

Abstract

To inhibit failure of a battery even if a torsional angle of a side frame supporting a battery pack becomes large in a frame vehicle.SOLUTION: In a battery mounting structure of a frame vehicle 1, a battery pack 10 is supported by a pair of left and right side frames 3, 5 provided in the frame vehicle 1 and extending in a vehicle front-rear direction. The battery mounting structure includes: a plurality of lateral members 20 extending in a vehicle width direction and bridging the pair of right and left side frames 3, 5; a longitudinal member 30 supported by the plurality of lateral members 20 so as to extend in the vehicle front-rear direction at an intermediate position of the side frames 3, 5; and support members 40 which are provided at intervals in the vehicle front-rear direction in the longitudinal member 30 and support the battery pack 10 such that gaps are formed between the support members 40 and the lateral members 20 in a vertical direction. The battery pack 10 is connected to the side frames 3, 5 via a rubber bush 50.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a battery mounting structure in an electric vehicle, and more particularly to a battery mounting structure in a frame-equipped electric vehicle (hereinafter also simply referred to as a "frame vehicle"). [Background technology]

[0002] Conventionally, in electric vehicles that are powered by electricity supplied from a battery, the battery has typically been mounted in such a way that a battery pack, in which secondary batteries such as lithium-ion batteries are systemized and assembled into a case, is supported by a pair of left and right side frames that extend in the fore-and-aft direction of the vehicle.

[0003] For example, Patent Document 1 discloses a fixing structure for a battery pack of an electric vehicle in which a bracket fixed to a housing (case) of the battery pack is fastened to a pair of left and right side frames that extend in the fore-and-aft direction of the vehicle and form part of the skeleton of the vehicle body in a so-called monocoque vehicle. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-101589 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a mounting structure in which a battery pack is simply fastened to a side frame, as in Patent Document 1, is applied to a so-called frame vehicle in which the body (cabin) is mounted on the side frame via a cab mount or the like, rather than to a monocoque vehicle, the following problems may arise.

[0006] That is, unlike a monocoque vehicle in which the side frame is integrated with the body and thus the torsional rigidity of the side frame is relatively high, in a frame vehicle, the side frame and the body are separate, so the torsional rigidity of the side frame alone is relatively low. Therefore, in a frame vehicle, if a mounting structure is adopted in which the battery pack is simply fastened to the side frame, as in a monocoque vehicle, the torsional angle of the side frame is large while driving (when going over a step, etc.), and the battery pack fastened to it is significantly twisted, which may lead to battery failure.

[0007] Here, in order to absorb the torsion of the side frame, it is possible to support the battery pack on the side frame via a rubber mount. However, to support a battery pack weighing several hundred kg, a stiff spring characteristic of several hundred N / mm is required, and it is difficult for a rubber mount with such stiff spring characteristic to absorb the torsion (vertical displacement) of the side frame.

[0008] The present invention has been made in consideration of these points, and its purpose is to provide a battery mounting structure that can prevent battery failure even when the torsion angle of the side frame supporting the battery pack becomes large in a frame vehicle in which the side frame and the body are separated. [Means for solving the problem]

[0009] In order to achieve the above-mentioned objective, in the battery mounting structure for a frame vehicle of the present invention, the battery pack is supported by a vertical member located midway between a pair of left and right side frames, where the influence of the torsional angle between the two frames is least likely to occur.

[0010] Specifically, the present invention is directed to a battery mounting structure for a frame vehicle in which a battery pack is supported by a pair of left and right side frames extending in the front-rear direction of the vehicle, the side frames being provided on the frame vehicle.

[0011] The battery mounting structure of this frame vehicle comprises a plurality of lateral members extending in the vehicle width direction and spanning the pair of left and right side frames, a vertical member supported by the plurality of lateral members so as to extend in the fore-aft direction of the vehicle at a midpoint in the vehicle width direction between the pair of left and right side frames, and support members which are provided on the vertical members at intervals in the fore-aft direction of the vehicle and support the battery pack so as to create a vertical gap between the lateral members, and the battery pack is connected to the side frames via rubber bushings.

[0012] In this configuration, the vertical displacement of the center of the lateral member, which is located at the midpoint between the pair of left and right side frames in the vehicle width direction, is the average of the displacements of the left and right side frames, so that even if the torsional angle of the side frames increases, almost no displacement occurs. Therefore, the vertical member supported by the multiple lateral members so as to extend in the vehicle front-rear direction at the midpoint between the pair of left and right side frames in the vehicle width direction is hardly affected (no displacement occurs) even if the torsional angle of the side frames increases.

[0013] Since the battery pack is supported by the multiple support members provided on the vertical members, it is hardly affected even if the torsion angle of the side frames increases. Also, since the support members support the battery pack so that a vertical gap is created between the battery pack and the horizontal members, the battery pack is not affected even if the horizontal members are significantly tilted when the torsion angle of the side frames increases. Therefore, even if the torsion angle of the side frames increases, the battery pack is not significantly twisted, which can prevent battery failure.

[0014] When viewed in a cross section perpendicular to the fore-and-aft direction of the vehicle, the battery pack is supported at a single point, midway between the pair of left and right side frames, which may appear to make the battery pack unstable; however, because the battery pack is connected to the side frames via rubber bushings, the rubber bushings can regulate the swaying of the battery pack.

[0015] In the battery mounting structure for a frame vehicle, the support member may be a bolt that fastens the longitudinal member and the battery pack.

[0016] As described above, the battery pack is supported by the vertical members which are hardly affected even when the torsional angle of the side frame becomes large, so there is no problem in rigidly connecting the battery pack and the vertical members with bolts. According to this configuration, the structure can be simplified by fastening the vertical members and the battery pack with bolts.

[0017] Furthermore, in the battery mounting structure for a frame vehicle, the support member may be a rubber mount having flexibility around the vehicle longitudinal axis.

[0018] To support a battery pack weighing several hundred kg, a stiff spring characteristic of several hundred N / mm is required; however, it is possible to have stiff spring characteristics in the vertical direction while having soft spring characteristics around the vehicle's fore-and-aft axis. With this configuration, by supporting the battery pack around the vehicle's fore-and-aft axis with a flexible rubber mount, the rubber mount can absorb displacement of the battery pack around the vehicle's fore-and-aft axis. Effect of the Invention

[0019] As described above, according to the battery mounting structure for a frame vehicle of the present invention, battery failure can be suppressed even when the twist angle of the side frame supporting the battery pack becomes large. [Brief description of the drawings]

[0020] [Figure 1] 1 is a plan view showing a schematic view of a vehicle frame to which a battery mounting structure according to a first embodiment of the present invention is applied. [Diagram 2] 2 is a cross-sectional view taken along line II-II of FIG. 1. [Diagram 3] FIG. 3(a) is a diagram showing a schematic view of an example of a support member, and FIG. 3(b) is a detailed view of part B in FIG. 3(a). [Figure 4] FIG. 4(a) is a schematic diagram of a rubber bushing, and FIG. 4(b) is a cross-sectional view taken along line bb in FIG. 4(a). [Diagram 5] 11 is a perspective view showing a schematic view of the behavior of the battery pack when the twist angle of the side frame increases. FIG. [Figure 6] 1. FIG. 4 is a schematic diagram showing the behavior of the battery pack when the twist angle of the side frame increases, where FIG. 4(a) is a cross-sectional view taken along line VI(a)-VI(a) in FIG. 1, FIG. 4(b) is a cross-sectional view taken along line VI(b)-VI(b) in FIG. 1, and FIG. 4(c) is a cross-sectional view taken along line VI(c)-VI(c) in FIG. 1. [Figure 7] FIG. 7(a) is a diagram showing a schematic diagram of an example of a support member according to the second embodiment of the present invention, and FIG. 7(b) is a detailed diagram of part B in FIG. 7(a). [Figure 8] FIG. 11 is a plan view illustrating a battery mounting structure according to a modified example of the present invention. [Figure 9] 9 is a cross-sectional view taken along line IX-IX in FIG. 8. [Figure 10] FIG. 11 is a cross-sectional view showing a battery mounting structure according to another embodiment. [Figure 11] FIG. 1 is a diagram for explaining a typical battery mounting structure for a conventional frame vehicle. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, an arrow Fw indicates the front side in the vehicle longitudinal direction, an arrow Lf indicates the left side in the vehicle width direction, and an arrow Up indicates the upper side.

[0022] (Embodiment 1) -Frame vehicle- Fig. 1 is a plan view showing a frame of a vehicle 1 to which a battery mounting structure according to this embodiment is applied, and Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1. Note that left and right wheels 7 are omitted from Fig. 1. As shown in Fig. 1, the vehicle 1 includes a pair of left and right side frames 3, 5 extending in the front-rear direction of the vehicle.

[0023] This vehicle 1 is configured as an electric automobile driven by an electric motor (not shown) using a battery 11 as a main power source, and is also configured as a so-called frame vehicle in which a body (cabin) (not shown) is mounted on the side frames 3, 5 via a cab mount (not shown) attached to a plurality of mount attachment portions 9 fixed to the side frames 3, 5. Therefore, in the following description, the vehicle 1 is also referred to as a "frame vehicle 1."

[0024] This frame vehicle 1 employs a battery mounting structure in which a battery pack 10, in which a battery 11 is systemized and housed in a case, is supported by a pair of left and right side frames 3, 5, as shown in Figs.

[0025] -Battery mounting structure- Next, the battery mounting structure in the frame vehicle 1 will be described in detail. Prior to that, however, in order to facilitate understanding of this embodiment, a battery mounting structure in a conventional frame vehicle will be described.

[0026] Figure 11 is a diagram that illustrates a typical battery mounting structure of a conventional frame vehicle 101. In the conventional frame vehicle 101, as shown in Figure 11(a), a structure is adopted in which a battery pack 110 is simply fastened to side frames 103, 105 via frame support points 140, but such a battery mounting structure may cause the following problems.

[0027] That is, unlike a monocoque vehicle, which has high torsional rigidity due to the side frames and body being integrated, in the frame vehicle 101, the side frames 103, 105 are separated from the body, so the torsional rigidity of only the side frames 103, 105 is relatively low. Therefore, in the frame vehicle 101, when traveling (e.g., when going over a step), if the torsional angle of the side frames 103, 105 increases from the state shown in Fig. 11(b) to, for example, as shown in Fig. 11(c), such that the front end of the left side frame 103 drops and the rear end rises, while the front end of the right side frame 105 rises and the rear end drops, the battery pack 110 fastened to the side frames 103, 105 is significantly twisted, which may lead to battery failure.

[0028] Here, in order to absorb the torsion of the side frames 103, 105, it is possible to configure the frame support points 140 with rubber mounts and support the battery pack 110 with the side frames 103, 105 via the rubber mounts. However, in order to support the battery pack 110 weighing several hundred kg, a stiff spring characteristic of several hundred N / mm is required, and it is difficult for a rubber mount having such stiff spring characteristics to absorb the torsion (vertical displacement) of the side frames 103, 105.

[0029] Therefore, in the battery mounting structure of the frame vehicle 1 of this embodiment, as shown in Figures 1 and 2, the battery pack 10 is supported by a vertical member 30 provided at the midpoint between the pair of left and right side frames 3, 5, where the influence of the torsional angle of the two frames is least likely to occur.

[0030] More specifically, the battery mounting structure of this embodiment includes multiple (five in the example of FIG. 1) lateral members 20 (20A, 20B, 20C, 20D, 20E), a vertical member 30, a support member 40, and a rubber bushing 50.

[0031] Each of the lateral members 20A, 20B, 20C, 20D, 20E is formed in a hollow rectangular shape made of, for example, metal, extending in the vehicle width direction, and is suspended across the pair of left and right side frames 3, 5 by being bolted to the undersides of the side frames 3, 5. These lateral members 20A, 20B, ... are suspended across the pair of left and right side frames 3, 5 in the frame vehicle 1, and perform the same function as a cross member that supports a radiator (not shown), spare tire 8, etc.

[0032] The vertical member 30, like the horizontal member 20, is formed into a hollow rectangular shape made of, for example, metal. The vertical member 30 is fastened to the upper surface of the horizontal member 20 by, for example, bolts, and is thereby supported by the side frames 3, 5 via the multiple horizontal members 20A, 20B, .... More specifically, as shown in Figs. 1 and 2, the vertical member 30 is supported by the multiple horizontal members 20A, 20B, ... so as to extend in the vehicle front-rear direction at a middle position (on the vehicle center line CL) in the vehicle width direction of the pair of left and right side frames 3, 5.

[0033] FIG. 3(a) is a schematic diagram of an example of the support member 40, and FIG. 3(b) is a detailed diagram of part B in FIG. 3(a). As shown in FIG. 1, a plurality of support members 40 (five in the example of FIG. 1) are provided on the vertical member 30 at intervals in the vehicle front-rear direction. These support members 40 support the battery pack 10 so that a vertical gap C is generated between the upper surface of the horizontal member 20 and the lower surface of the battery pack 10, as shown in FIG. 3(a). Note that, in FIG. 1, the support member 40 is provided at a position where the horizontal member 20 and the vertical member 30 intersect, but the support member 40 may be provided at any position on the vertical member 30 in the vehicle front-rear direction.

[0034] 3(b), the support member 40 is composed of a bolt 40A. The bolt 40A is welded to the lower surface of the battery pack 10, for example, and is inserted into a bolt hole formed in the upper surface of the vertical member 30 and tightened with a nut 31 to connect the lower surface of the battery pack 10 and the upper surface of the vertical member 30 in such a manner that a vertical gap C is generated between the upper surface of the horizontal member 20 and the lower surface of the battery pack 10.

[0035] Fig. 4(a) is a schematic diagram of the rubber bushing 50, and Fig. 4(b) is a cross-sectional view taken along line bb in Fig. 4(a). In Fig. 4(b), the vibration absorbing rubber 57 and the stopper rubber 59 are not shown in cross section, but are hatched to make the drawing easier to see. As shown in Fig. 4(b), the rubber bushing 50 includes a first shaft portion 51, a second shaft portion 53, a cylindrical portion 55, the vibration absorbing rubber 57, and the stopper rubber 59.

[0036] The first shaft portion 51 is a metal member formed into a cylindrical shape with a relatively large diameter, and the second shaft portion 53 is a metal member formed into a cylindrical shape with a relatively small diameter. The first shaft portion 51 and the second shaft portion 53 are connected in the axial direction via a step portion. The first shaft portion 51 is inserted into the tube portion 55, and the outer peripheral surface of the first shaft portion 51 and the inner peripheral surface of the tube portion 55 are elastically connected via a vibration absorbing rubber 57, as shown in FIG. 4(b). In addition, a stopper rubber 59 is provided on the outer peripheral surface of the first shaft portion 51 so as to be spaced from the inner peripheral surface of the tube portion 55 in the tube diameter direction.

[0037] 4(a), the tip of the second shaft portion 53 is connected to an end of the battery pack 10, while the end of the tube portion 55 on the outer side in the vehicle width direction is connected to a side surface of the side frame 3. In this way, the battery pack 10 is elastically connected to the side frame 3 via the rubber bush 50.

[0038] In the rubber bush 50 configured in this manner, when the first shaft portion 51 is displaced relative to the tubular portion 55, in other words, when the battery pack 10 is displaced relative to the side frame 3, the stopper rubber 59 comes into contact with the tubular portion 55, thereby restricting the maximum amount of movement of the battery pack 10 during driving and preventing impact noise caused by contact between the first shaft portion 51 and the tubular portion 55. In addition, since the outer peripheral surface of the first shaft portion 51 and the inner peripheral surface of the tubular portion 55 are elastically connected via the vibration absorbing rubber 57, it is possible to control resonance of the battery pack 10 caused by input from the road surface.

[0039] In FIG. 1, the rubber bushings 50 are provided at the positions where the lateral members 20A, 20C, and 20E are installed, but this is not limited to the above and the rubber bushings 50 may be provided at any position in the fore-and-aft direction of the vehicle, and the number of rubber bushings 50 is not limited to six.

[0040] -Actions and Effects- Fig. 5 is a perspective view showing a typical behavior of the battery pack 10 when the twist angle of the side frames 3, 5 increases. Fig. 6 is a typical view showing a typical behavior of the battery pack 10 when the twist angle of the side frames 3, 5 increases, where Fig. 5(a) is a cross-sectional view taken along line VI(a)-VI(a) in Fig. 1, Fig. 6(b) is a cross-sectional view taken along line VI(b)-VI(b) in Fig. 1, and Fig. 6(c) is a cross-sectional view taken along line VI(c)-VI(c) in Fig. 1.

[0041] For example, as shown in FIG. 5, even if the torsional angle of the side frames 3, 5 increases, such as when the front end of the left side frame 3 lowers and the rear end rises, while the front end of the right side frame 5 rises and the rear end lowers, in the battery mounting structure of this embodiment, the battery pack 10 hardly displaces.

[0042] More specifically, as shown in FIG. 6(a), when the left side frame 3 is lowered while the right side frame 5 is raised, the lateral member 20A is significantly tilted downward to the left. However, even if the lateral member 20A is significantly tilted downward to the left, the vertical displacement of the center of the lateral member 20A, which is the intermediate position (vehicle center line CL) in the vehicle width direction of the pair of left and right side frames 3, 5, is the average value of the displacements of the left and right side frames 3, 5. Therefore, even if the torsion angle of the side frames 3, 5 becomes large, almost no displacement occurs in the center of the lateral member 20A. Similarly, the lateral member 20B adjacent to the lateral member 20A is also tilted downward to the left, but almost no displacement occurs in the center of the lateral member 20B.

[0043] 6(c), when the left side frame 3 rises while the right side frame 5 drops, the lateral member 20E tilts significantly downward to the right, but even if the lateral member 20E tilts significantly downward to the right, there is almost no displacement in the center of the lateral member 20E, which is the intermediate position in the vehicle width direction (vehicle center line CL) between the pair of left and right side frames 3, 5. Similarly, the lateral member 20D adjacent to the lateral member 20E also tilts downward to the right, but there is almost no displacement in the center of the lateral member 20D.

[0044] Furthermore, since the central portions of the side frames 3, 5 in the fore-and-aft direction of the vehicle are hardly displaced, the lateral member 20C spanning said central portions is hardly displaced, as shown in FIG. 6(b). Naturally, therefore, almost no displacement occurs in the central portion of the lateral member 20C.

[0045] In this way, since almost no displacement occurs in the central parts of each lateral member 20A, 20B, 20C, 20D, 20E, in the battery mounting structure of the frame vehicle 1 of this embodiment, the vertical member 30 supported by the multiple lateral members 20A, 20B, ... so as to extend in the fore-and-aft direction of the vehicle at the intermediate position (vehicle center line CL) is hardly affected (no displacement occurs) even when the torsion angle of the side frames 3, 5 becomes large.

[0046] Thus, since the battery pack 10 is supported by the multiple support members 40 provided on the vertical members 30, it is hardly affected even if the torsion angle of the side frames 3, 5 becomes large. Moreover, since the support members 40 support the battery pack 10 so that a vertical gap C is generated between each of the horizontal members 20A, 20B, ..., the battery pack 10 is not affected even if each of the horizontal members 20A, 20B, ... is significantly tilted. Therefore, even if the torsion angle of the side frames 3, 5 becomes large, the battery pack 10 is not significantly twisted, and this makes it possible to suppress breakdowns of the battery 11.

[0047] When viewed in a cross section perpendicular to the fore-and-aft direction of the vehicle, the battery pack 10 may appear unstable because it is supported at a single point by the support member 40 at the center of the lateral member 20; however, because the battery pack 10 is connected to the side frames 3, 5 via rubber bushings 50, the rubber bushings 50 can regulate the shaking of the battery pack 10.

[0048] In addition, in the battery mounting structure of this embodiment, the support member 40 is formed by the bolt 40A that fastens the vertical member 30 and the battery pack 10. However, as described above, the battery pack 10 is supported by the vertical member 30 which is hardly affected even when the torsional angle of the side frames 3, 5 becomes large. Therefore, there is no problem in rigidly connecting the battery pack 10 and the vertical member 30 with the bolt 40A, and the structure can be simplified by fastening the vertical member 30 and the battery pack 10 with the bolt.

[0049] (Embodiment 2) This embodiment differs from the above-described first embodiment in that the support member 40 is configured as a rubber mount. The following will mainly describe the differences from the first embodiment.

[0050] Fig. 7(a) is a schematic diagram of an example of the support member 40 according to this embodiment, and Fig. 7(b) is a detailed diagram of part B in Fig. 7(a). In this embodiment, as shown in Fig. 7(b), the support member 40 is configured with a rubber mount 40B. The rubber mount 40B has a metal upper plate 41 and a lower plate 43, and a vibration-proof rubber 45 connecting the two plates 41 and 43. The upper plate 41 is attached to the lower surface of the battery pack 10 by welding or the like, while the lower plate 43 is attached to the upper surface of the vertical member 30 by welding or the like.

[0051] Since the vibration-proof rubber 45 supports the battery pack 10 weighing several hundred kg, it has a stiff spring characteristic of several hundred N / mm in the vertical direction, but has flexibility around the vehicle longitudinal axis (see the thick arrow in FIG. 7(b)). Therefore, the rubber mount 40B is capable of absorbing the displacement of the battery pack 10 in the rotational direction while supporting the battery pack 10 weighing several hundred kg.

[0052] -Actions and Effects- According to this embodiment, even if the torsion angle of the side frames 3, 5 supporting the battery pack 10 becomes large, not only can damage to the battery 11 be prevented, but the displacement of the battery pack 10 around the vehicle's fore-and-aft axis can be absorbed by the rubber mount 40B.

[0053] (Modification) In this modified example, the mounting position of the rubber bushing 50 is different from that of the above-described first and second embodiments. The following description will focus on the points that differ from the first and second embodiments.

[0054] Fig. 8 is a plan view showing a battery mounting structure according to a modified example of the present invention, and Fig. 9 is a cross-sectional view taken along line IX-IX in Fig. 8. The battery mounting structure according to the modified example of the present invention includes eight rubber bushes 50, but since the rubber bushes 50 are provided at positions different from the positions at which the lateral members 20 are installed as shown in Fig. 8, the rubber bushes 50 can be set at the lower parts of the side frames 3 and 5 without interfering with the lateral members 20 as shown in Fig. 9.

[0055] In this way, according to this modified example, with the simple configuration of providing the rubber bushings 50 at a position different from the position at which the lateral member 20 is installed, it is possible to increase the freedom of the mounting layout of the rubber bushings 50 on the side frames 3, 5.

[0056] (Other embodiments) The present invention is not limited to the embodiments, and can be embodied in various other forms without departing from the spirit or main characteristics thereof.

[0057] In each of the above embodiments, the lateral member 20 is suspended across a pair of left and right side frames 3, 5 by fastening it to the underside of the side frames 3, 5 with bolts. However, this is not limited to this. For example, as shown in FIG. 10, the lateral member 20 may be suspended across a pair of left and right side frames 3, 5 by fastening it to the upper surfaces of the side frames 3, 5 with bolts.

[0058] As such, the above-described embodiment is merely illustrative in all respects and should not be interpreted as being limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0059] According to the present invention, even if the torsional angle of the side frame becomes large, it is possible to suppress battery damage due to torsion, and therefore it is extremely useful when applied to the battery mounting structure of a frame vehicle in which the battery pack is supported by the side frame. [Explanation of symbols]

[0060] 1 Frame car 3 Side frame 5 Side frame 10 Battery pack 20 Transverse Member 30 Vertical members 40 Support member 40A Volts 40B Rubber Mount 50 Rubber bush C Gap

Claims

1. A battery mounting structure for a frame vehicle, in which a battery pack is supported by a pair of left and right side frames extending in a front-rear direction of the vehicle, the battery mounting structure comprising: A plurality of lateral members extending in a vehicle width direction and spanning the pair of left and right side frames; a longitudinal member supported by the plurality of lateral members so as to extend in a vehicle front-rear direction at a middle position in a vehicle width direction between the pair of left and right side frames; a plurality of support members provided on the vertical member at intervals in the vehicle front-rear direction, the support members supporting the battery pack such that a vertical gap is generated between the support members and the horizontal member; A battery mounting structure for a frame vehicle, wherein the battery pack is connected to the side frame via a rubber bushing.

2. In the battery mounting structure for a frame vehicle according to claim 1, 2. A battery mounting structure for a frame vehicle, wherein the support members are bolts that fasten the vertical members and the battery pack.

3. In the battery mounting structure for a frame vehicle according to claim 1, A battery mounting structure for a frame vehicle, wherein the support member is a rubber mount having flexibility around the vehicle's fore-aft axis.

Images