Battery pack mounted on vehicle

Abstract

The present disclosure relates to a vehicle-mounted battery pack provided with a bracket provided on either the front side or the rear side of the battery pack, the bracket having at least two connecting parts, a first connecting part connected to a floor reinforcement, and a second connecting part connected to a floor bracket connected to a floor at a position below the first connecting part, the first connecting part and the second connecting part are arranged at different positions in the width direction of the bracket.

Description

Technical Field

[0001] The present disclosure relates to a battery pack for vehicle installation. Background Art

[0002] Japanese Patent Application Laid-Open No. 2022-111787 discloses a vehicle-mounted battery pack including a shock absorbing portion. Summary of the invention

[0003] At present, a technology has been developed to protect the battery pack when an impact is applied to the vehicle by providing an impact absorbing part. In Japanese Patent Laid-Open No. 2022-111787, a battery pack is disclosed, which uses a frame with an easily deformable part provided on a tray for storing batteries, and when an impact is applied to the vehicle, the impact absorbing part deforms downward than the battery area, thereby protecting the battery area.

[0004] On the other hand, when a load from a side collision (hereinafter referred to as a "side collision") is input, if the floor retreats, the base of the center tunnel where the pipes and wires are laid tends to fall down. At this time, there is a possibility that the floor may contact the upper surface of the battery pack.

[0005] The present disclosure has been made to solve such a problem, and an object of the present disclosure is to provide a vehicle-mounted battery pack capable of suppressing interference between a floor and a battery when a side collision load is input.

[0006] The vehicle-mounted battery pack disclosed in the present invention includes a bracket, which is provided on either the front side or the rear side of the battery pack, wherein: The bracket has at least two connecting parts, The first connection portion is connected to the floor reinforcement member, The second connecting portion is connected to a floor bracket connected to the floor at a position lower than the first connecting portion. The first connection portion and the second connection portion are arranged at different positions in the width direction of the bracket.

[0007] Thus, it is possible to provide a vehicle-mounted battery pack that can suppress interference between the floor and the battery when a side collision load is input.

[0008] Furthermore, the first connection portion and the second connection portion may be arranged at equal distances from the center of gravity of the battery pack. This makes it possible to make the loads on the connection portions equal and suppress unevenness.

[0009] Furthermore, the second connection portion may be arranged at a position closer to the exhaust pipe than the first connection portion. Thus, the second connection portion can be arranged on a side where a distance from the vehicle outer side is ensured by the exhaust pipe.

[0010] According to the present disclosure, it is possible to provide a vehicle-mounted battery pack that can suppress interference between a floor and a battery when a side impact load is input during a vehicle collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings, wherein like reference numerals represent like elements.

[0012] Figure 1A It is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0013] Figure 1B It is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0014] Figure 1C It is a cross-sectional view of the vehicle-mounted battery pack of the present disclosure.

[0015] Figure 2 These are a plan view, a cross-sectional view, and a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0016] Figure 3A It is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0017] Figure 3B It is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0018] Figure 3C It is a cross-sectional view of a vehicle-mounted battery pack according to the present disclosure.

[0019] Figure 4 It is a top view of the vehicle-mounted battery pack of the present disclosure. DETAILED DESCRIPTION

[0020] use Figure 1A , Figure 1B , Figure 1C A configuration example of a vehicle-mounted battery pack (hereinafter referred to as a “battery pack”) of the present disclosure will be described. Figure 1A The battery pack 10 shown in the perspective view of FIG. 1 is a vehicle-mounted battery pack of a specification to be mounted under the floor of the vehicle, and has a bracket 20 and has a structure to be mounted on the vehicle via the bracket 20 .

[0021] The bracket 20 has a step and at least two connecting parts, and the at least two connecting parts are provided at different positions in a width direction (corresponding to "RH" in the figure) of the bracket 20 so as to sandwich the step. Here, the connecting part located at the upper side (corresponding to "UPR" in the figure) of the three-dimensional diagram is referred to as the first connecting part 21, and the connecting part located at the lower side is referred to as the second connecting part 22.

[0022] It should be noted that, in the present embodiment, the bracket 20 is described as a rear bracket provided on the rear side of the battery pack 10 (corresponding to the opposite direction of "Fr" in the figure), but the present invention is not limited thereto. The bracket 20 can also be appropriately used as a front bracket provided on the front side of the battery pack 10 (corresponding to "Fr" in the figure).

[0023] Figure 1B 1 is a diagram showing a configuration example of a floor reinforcement 23 and a floor bracket 24 connected to the bracket 20 . Figure 1C is a cross-sectional view showing a state where the bracket 20, the floor reinforcement 23, and the floor bracket 24 are connected via the floor 25. Figure 1A The cross section at the single-dot chain line II-II is shown in FIG.

[0024] Next, use Figure 2 The details of the bracket 20, the floor reinforcement 23, and the floor bracket 24 of the present disclosure are explained with reference to the upper, middle, and lower figures. Figure 2 In the figure on the lower side, the battery pack 10 is omitted, but is connected to the bracket 20 at the battery pack mounting point 11.

[0025] Preferably, the floor bracket 24 is installed on the side that receives the side collision load ( Figure 2 ). In addition, the floor reinforcement 23 is preferably mounted on the opposite side of the floor bracket 24 in a manner that can suppress deformation in the width direction when a side collision load is input.

[0026] For example, in the case of a plug-in hybrid electric vehicle (PHEV), the distance on the RH side is ensured by setting the exhaust pipe on the RH side. Therefore, the influence of the side collision load on the RH side is relatively small. Therefore, the floor bracket 24 is preferably installed on the side opposite to the RH side where the influence of the side collision load is larger, thereby configuring the second connecting portion 22 to be closer to the exhaust pipe than the first connecting portion 21.

[0027] like Figure 2 As shown in the lower side view of FIG. 1 , the bracket 20 has a step between the first connection portion 21 and the second connection portion 22. This can induce torsion on the side to which the side collision load is input.

[0028] Here, use Figure 3A , Figure 3B , Figure 3C Deformations of the bracket 20 , the floor reinforcement 23 , the floor bracket 24 , and the floor 25 when a side collision load is input will be described. Figure 3A , Figure 3B , Figure 3CThe deformation base points shown in refractory FIG. 2 represent base points at which the bracket 20 , the floor reinforcement 23 , the floor bracket 24 , and the floor panel 25 are rotationally deformed in the directions of arrows when a side collision load is input.

[0029] like Figure 3A As shown, when a side collision load is input, the floor reinforcement 23 and the floor bracket 24 rotate with their boundary line as a base point, thereby suppressing the deformation progress of the floor reinforcement 23.

[0030] like Figure 3B As shown, when a side collision load is input, the bracket 20 rotates with the base portion of the step as a base point, thereby suppressing the deformation of the bracket 20 from progressing at the second connection portion 22 .

[0031] like Figure 3C As shown, when a side collision load is input, the floor 25 rotates so as to rise from the deformation base point in the UPR direction. This rotation can avoid interference between the floor 25 and the battery pack 10 in the opposite direction to the UPR, that is, caused by a downward collision.

[0032] In addition, preferably Figure 4 As shown in the plan view of the battery pack 10 , the first connecting portion 21 and the second connecting portion 22 of the bracket 20 are arranged at equal distances from the center of gravity of the battery pack 10 .

[0033] Considering the flow diversion during spot welding, the spot welding points of the floor reinforcement 23, the floor bracket 24, and the floor 25 around the first connection part 21 and the second connection part 22 are substantially the same. Inputting a larger load to the rotating side can further induce rotation, so the lifting amount of the floor 25 increases. On the other hand, since the load at the floor 25 and the spot welding points increases, the welding points may be peeled off and the floor 25 may be pierced.

[0034] In this regard, by providing the first connection portion 21 and the second connection portion 22 at equal distances from the center of gravity of the battery pack 10, the moments are equal. Therefore, the loads input to the first connection portion 21 and the second connection portion 22 can also be equalized. Therefore, the loads on the floor panel 25 and the spot welding points can be equalized, so that the welding points can be prevented from peeling off and the floor panel 25 can be prevented from being punctured. In addition, the side collision load is borne at the second connection portion 22, and the development of the side collision can be prevented.

[0035] In this way, it is possible to provide a vehicle-mounted battery pack that can suppress interference between the floor and the battery when a side collision load is input.

[0036] In addition, the present disclosure is not limited to the above contents, and can be appropriately modified within a scope not departing from the gist.

Claims

1. A battery pack for vehicle installation, comprising a bracket, the bracket being provided on either the front side or the rear side of the battery pack, wherein: The bracket has at least two connecting parts, The first connection portion is connected to the floor reinforcement member, The second connecting portion is connected to a floor bracket connected to the floor at a position lower than the first connecting portion. The first connection portion and the second connection portion are arranged at different positions in the width direction of the bracket.

2. The vehicle-mounted battery pack according to claim 1, wherein: The first connection portion and the second connection portion are arranged so that the distances from the center of gravity of the battery pack are equal to each other.

3. The vehicle-mounted battery pack according to claim 1, wherein: The second connection portion is arranged at a position closer to the exhaust pipe than the first connection portion.

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