Vehicle battery pack

Abstract

To provide a vehicle battery pack capable of suppressing interference between a floor panel and a battery when a side impact load is input.SOLUTION: A vehicle battery pack according to the present disclosure includes a bracket 20 provided on either the front or rear side of a battery pack 10, the bracket includes at least two fastening portions, a first fastening portion 21 is fastened to a floor reinforcement 23, a second fastening portion 22 is fastened to a floor bracket 24 fastened to a floor panel 25 at a position lower than the first fastening portion, and the first fastening portion and the second fastening portion are positioned at different positions in the width direction of the bracket.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a battery pack for mounting on a vehicle. [Background technology]

[0002] Patent Document 1 discloses a battery pack for mounting on a vehicle that is provided with a shock absorbing portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2022-111787 A Summary of the Invention [Problem to be solved by the invention]

[0004] A technology has been developed that provides a shock absorbing part to protect the battery pack when a shock is applied to the vehicle. Patent Document 1 discloses a battery pack that uses a frame provided with a deformable part on the tray that contains the battery, so that when a shock is applied to the vehicle, the shock absorbing part deforms downward from the battery area to protect the battery area.

[0005] On the other hand, when the load of a side collision (hereinafter referred to as a "side impact") is input, if the floor panel contracts, the base of the center tunnel, in which the piping and wiring are routed, tends to fall downward, which may come into contact with the top surface of the battery pack.

[0006] The present disclosure has been made to solve such problems, and aims to provide a battery pack for mounting on a vehicle that can suppress interference between the floor panel and the battery when a side impact load is input. [Means for solving the problem]

[0007] The present disclosure provides a vehicle-mounted battery pack including a bracket provided on either the front side or the rear side of the battery pack, the bracket having at least two fastening parts, a first fastening part fastening to a floor reinforcement and a second fastening part fastening to a floor bracket fastened to a floor panel at a position lower than the first fastening part, the first fastening part and the second fastening part being disposed at different positions in the width direction of the bracket. In this way, it is possible to provide a vehicle-mounted battery pack capable of suppressing interference between the floor panel and the battery when a side collision load is input.

[0008] The first fastening portion and the second fastening portion may be disposed so as to be equidistant from the center of gravity of the battery pack, thereby making it possible to equalize the loads of the fastening portions and suppress bias.

[0009] The second fastening portion may be disposed closer to the exhaust pipe than the first fastening portion, thereby making it possible to dispose the second fastening portion on a side where the exhaust pipe ensures a distance from the outside of the vehicle. Effect of the Invention

[0010] The present disclosure makes it possible to provide a battery pack for mounting on a vehicle that can suppress interference between a floor panel and a battery when a side impact load is input during a vehicle collision. [Brief description of the drawings]

[0011] [Figure 1] 1A and 1B are a perspective view and a cross-sectional view of a battery pack to be mounted on a vehicle according to the present disclosure. [Diagram 2] 1A and 1B are a top view, a cross-sectional view, and a perspective view of a battery pack for mounting on a vehicle according to the present disclosure. [Diagram 3] 1A and 1B are a perspective view and a cross-sectional view of a battery pack to be mounted on a vehicle according to the present disclosure. [Figure 4] FIG. 2 is a top view of a vehicle-mounted battery pack according to the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] An example of the configuration of a vehicle-mounted battery pack (hereinafter referred to as "battery pack") according to the present disclosure will be described with reference to Fig. 1. Battery pack 10 shown in the perspective view of Fig. 1(a) is a vehicle-mounted battery pack designed to be mounted under the floor of a vehicle, and includes a bracket 20 and is configured to be attached to the vehicle by the bracket 20.

[0013] Bracket 20 has a step and at least two fastening portions provided at different positions on either side of the step in the width direction (corresponding to "RH" in the figure) of bracket 20. Here, the fastening portion located at the top of the perspective view (corresponding to "UPR" in the figure) is referred to as first fastening portion 21, and the fastening portion located at the bottom is referred to as second fastening portion 22.

[0014] In this embodiment, bracket 20 is described as a rear bracket provided on the rear side of battery pack 10 (corresponding to the opposite direction of "Fr" in the figure), but the present disclosure is not limited to this, and bracket 20 can also be suitably used as a front bracket provided on the front side of battery pack 10 (corresponding to "Fr" in the figure).

[0015] Fig. 1(b) is a diagram showing an example of the configuration of a floor reinforcement 23 and a floor bracket 24 that are fastened to the bracket 20. Fig. 1(c) is a cross-sectional view of the bracket 20, the floor reinforcement 23, and the floor bracket 24 fastened via a floor panel 25, showing a cross section taken along dashed line II-II shown in Fig. 1(a).

[0016] Next, the bracket 20, the floor reinforcement 23, and the floor bracket 24 according to the present disclosure will be described in detail with reference to Fig. 2(a) to (c). Note that although the battery pack 10 is not shown in Fig. 2(c), it is fastened to the bracket 20 at the battery pack attachment point 11.

[0017] The floor bracket 24 is preferably attached to the side that receives the side impact load (the side indicated by the arrow in Fig. 2(a) to (c)). The floor reinforcement 23 is preferably attached to the opposite side of the floor bracket 24 so as to suppress deformation in the width direction when the side impact load is input.

[0018] For example, in the case of a plug-in hybrid vehicle (PHEV), the exhaust pipe is located on the RH side to ensure a certain distance on the RH side, so the RH side is relatively less affected by the side impact load. Therefore, it is preferable that the floor bracket 24 is attached to the side opposite the RH side where the impact of the side impact load is greater, and thus the second fastening portion 22 is located closer to the exhaust pipe than the first fastening portion 21.

[0019] 2(c), the bracket 20 has a step between the first fastening portion 21 and the second fastening portion 22. This makes it possible to induce a twist on the side to which the side collision load is input.

[0020] Here, the deformation of the bracket 20, floor reinforcement 23, floor bracket 24, and floor panel 25 when a side impact load is input will be explained with reference to Figures 3(a) to (c). The deformation base points shown in Figures 3(a) to (c) indicate the base points at which the bracket 20, floor reinforcement 23, floor bracket 24, and floor panel 25 each undergo rotational deformation in the direction of the arrow when a side impact load is input.

[0021] As shown in Figure 3(a), when a side impact load is input, the floor reinforcement 23 and the floor bracket 24 rotate around their boundary as a base point, thereby suppressing the progression of deformation of the floor reinforcement 23.

[0022] As shown in FIG. 3(b), when a side impact load is input, bracket 20 rotates around the base portion of the step as a base point, thereby suppressing the progression of deformation of bracket 20 at second fastening portion 22.

[0023] As shown in Figure 3(c), when a side impact load is input, the floor panel 25 rotates so as to lift up in the UPR direction from the deformation base point, thereby avoiding interference between the floor panel 25 and the battery pack 10 in the direction opposite to the UPR, i.e., due to a downward impact.

[0024] As shown in the top view of battery pack 10 in FIG. 4, first fastening portion 21 and second fastening portion 22 of bracket 20 are preferably disposed so as to be equidistant from the center of gravity of battery pack 10.

[0025] The floor reinforcement 23, floor bracket 24, and floor panel 25 spot welding points around the first fastening portion 21 and the second fastening portion 22 are almost equal when current diversion during spot welding is taken into consideration. Inputting a larger load to the rotating side can induce more rotation, increasing the lift amount of the floor panel 25. On the other hand, the load on the floor panel 25 and the spot welding points increases, leading to spot peeling and holes in the floor panel 25.

[0026] In contrast, by providing the first fastening portion 21 and the second fastening portion 22 so that they are the same distance from the center of gravity of the battery pack 10, the moments are equal, and therefore the loads input to the first fastening portion 21 and the second fastening portion 22 can be equalized. Therefore, the load on the floor panel 25 and the spot impact point can be equalized, so that the second fastening portion 22 can withstand the side impact load and suppress the progression of the side impact while suppressing spot peeling and holes in the floor panel 25.

[0027] In this way, it is possible to provide a battery pack for mounting on a vehicle that can suppress interference between the floor panel and the battery when a side collision load is input.

[0028] The present disclosure is not limited to the above, and can be modified as appropriate without departing from the spirit and scope of the present disclosure. [Explanation of symbols]

[0029] 10 Battery pack 11 Battery pack attachment point 20 Bracket 21 1st fastening part 22 Second fastening part 23 Floor Reinforcement 24 Floor bracket 25 Floor Panel 26 Volts

Claims

1. A battery pack for mounting on a vehicle, comprising a bracket provided on either the front side or the rear side of the battery pack, The bracket has at least two fastening points; The first fastening portion is fastened to the floor reinforcement, The second fastening portion is fastened to a floor bracket fastened to a floor panel at a position lower than the first fastening portion, The first fastening portion and the second fastening portion are disposed at different positions in a width direction of the bracket. Vehicle battery pack.

2. The first fastening portion and the second fastening portion are disposed so as to be equidistant from the center of gravity of the battery pack. The battery pack for mounting on a vehicle according to claim 1 .

3. The second fastening portion is disposed at a position closer to the exhaust pipe than the first fastening portion. The battery pack for mounting on a vehicle according to claim 1 .

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