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 mounting. Background Art

[0002] Japanese Unexamined Patent Application Publication No. 2022-111787 discloses a battery pack for vehicle mounting having a shock absorption portion. SUMMARY OF THE DISCLOSURE

[0003] Currently, a technology has been developed to protect the battery pack by providing a shock absorption portion when an impact is applied to the vehicle. In Japanese Unexamined Patent Application Publication No. 2022-111787, a battery pack is disclosed in which, by using a frame having a deformable portion provided in a tray for housing the battery, when an impact is applied to the vehicle, the shock absorption portion deforms downward more than the battery region to protect the battery region.

[0004] On the other hand, when a load of a collision from the side (hereinafter referred to as "side collision") is input, if the floor retracts, the root of the central passage in which piping and wiring are laid has a tendency to fall downward. At this time, the floor may come into contact with the upper surface of the battery pack.

[0005] The present disclosure has been made to solve such problems, and an object thereof is to provide a battery pack for vehicle mounting that can suppress interference between the floor and the battery when a side collision load is input.

[0006] The battery pack for vehicle mounting of the present disclosure includes a bracket provided on either the front side or the rear side of the battery pack, wherein

[0007] the bracket has at least two connecting portions,

[0008] a first connecting portion is connected to a floor reinforcement,

[0009] a second connecting portion is connected to a floor bracket connected to the floor at a position lower than the first connecting portion,

[0010] the first connecting portion and the second connecting portion are arranged at different positions in the width direction of the bracket.

[0011] Thereby, a battery pack for vehicle mounting can be provided that can suppress interference between the floor and the battery when a side collision load is input.

[0012] Alternatively, the first connecting portion and the second connecting portion may be arranged such that the distances from the center of gravity of the battery pack are equal to each other. Thereby, the loads on the respective connecting portions can be made equal and unevenness can be suppressed.

[0013] Alternatively, it is also possible that the second connecting portion is disposed at a position closer to the exhaust pipe than the first connecting portion. Thereby, the second connecting portion can be disposed on the side where the distance from the vehicle exterior is ensured through the exhaust pipe.

[0014] According to the present disclosure, 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 during a vehicle collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features, advantages, and technical and industrial significance of exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings, in which like reference numerals represent like components.

[0016] Figure 1A is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0017] Figure 1B is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0018] Figure 1C is a cross-sectional view of the vehicle-mounted battery pack of the present disclosure.

[0019] Figure 2 is a top view, a cross-sectional view, and a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0020] Figure 3A is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0021] Figure 3B is a perspective view of the vehicle-mounted battery pack of the present disclosure.

[0022] Figure 3C is a cross-sectional view of the vehicle-mounted battery pack according to the present disclosure.

[0023] Figure 4 is a top view of the vehicle-mounted battery pack of the present disclosure. DETAILED DESCRIPTION

[0024] Use Figure 1A , Figure 1B , Figure 1C to illustrate a structural example of the vehicle-mounted battery pack (hereinafter referred to as "battery pack") of the present disclosure. Figure 1A The battery pack 10 shown in the perspective view is a vehicle-mounted battery pack of a specification mounted under the floor of a vehicle, and has a bracket 20 and is structured to be mounted on the vehicle through the bracket 20.

[0025] The bracket 20 has a step and at least two connecting portions, and the at least two connecting portions are arranged at different positions in the width direction of the bracket 20 (corresponding to "RH" in the figure) while sandwiching the step. Herein, the connecting portion located above in the perspective view (corresponding to "UPR" in the figure) is referred to as the first connecting portion 21, and the connecting portion located below is referred to as the second connecting portion 22.

[0026] It should be noted that in the present embodiment, the bracket 20 is described as a rear bracket provided at 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 at the front side of the battery pack 10 (corresponding to "Fr" in the figure).

[0027] Figure 1B FIG. is a structural example diagram of the floor reinforcement member 23 and the floor bracket 24 connected to the bracket 20. Figure 1C FIG. is a cross-sectional view of the state where the bracket 20, the floor reinforcement member 23, and the floor bracket 24 are connected via the floor 25, showing Figure 1A the cross-section at the single-dot chain line II-II shown in.

[0028] Next, use Figure 2 the upper, middle, and lower diagrams of to illustrate the details of the bracket 20, the floor reinforcement member 23, and the floor bracket 24 of the present disclosure. In addition, in Figure 2 the lower diagram of, the description of the battery pack 10 is omitted, but the battery pack mounting point 11 is connected to the bracket 20.

[0029] Preferably, the floor bracket 24 is installed on the side that bears the side collision load ( Figure 2 the side indicated by the arrow in). In addition, the floor reinforcement member 23 is preferably installed on the opposite side of the floor bracket 24 in a manner capable of suppressing the deformation in the width direction when inputting the side collision load.

[0030] For example, in the case of a plug-in hybrid electric vehicle (PHEV: Plug-in Hybrid Electric Vehicle), by arranging the exhaust pipe on the RH side, the distance on the RH side is ensured. Therefore, the influence of the side collision load on the RH side is relatively reduced. Therefore, the floor bracket 24 is preferably installed on the side with a greater influence of the side collision load on the opposite side of the RH side, whereby the second connecting portion 22 is arranged at a position closer to the exhaust pipe than the first connecting portion 21.

[0031] As Figure 2 shown in the lower diagram of, the bracket 20 has a step between the first connecting portion 21 and the second connecting portion 22. Thereby, the torsion on the side where the side collision load is input can be induced.

[0032] Herein, useFigure 3A , Figure 3B , Figure 3C Describe the deformation of the bracket 20, floor reinforcement 23, floor bracket 24, and floor 25 when a side collision load is input. Figure 3A , Figure 3B , Figure 3C The deformation base points shown in indicate the base points where the bracket 20, floor reinforcement 23, floor bracket 24, and floor 25 rotate and deform in the direction of the arrow when a side collision load is input.

[0033] As Figure 3A shown, when a side collision load is input, the floor reinforcement 23 and the floor bracket 24 rotate with their intersection line as the base point, thereby being able to suppress the development of the deformation of the floor reinforcement 23.

[0034] As Figure 3B shown, when a side collision load is input, the bracket 20 rotates with the root of the step as the base point, thereby being able to suppress the development of the deformation of the bracket 20 at the second connection part 22.

[0035] As Figure 3C shown, when a side collision load is input, the floor 25 rotates in a manner that rises from the deformation base point towards the UPR direction. Through this rotation, it is possible to avoid interference between the floor 25 and the battery pack 10 caused by a collision from the opposite direction of the UPR, that is, a collision from below.

[0036] In addition, preferably, as Figure 4 shown in the top view of the battery pack 10, the first connection part 21 and the second connection part 22 of the bracket 20 are arranged such that the distances from the center of gravity point of the battery pack 10 are equal to each other.

[0037] Considering shunting during spot welding, etc., the spot welds of the floor reinforcement 23, floor bracket 24, and floor 25 around the first connection part 21 and the second connection part 22 are substantially the same. Inputting a larger load to the side where rotation occurs can further induce rotation, so the rising amount of the floor 25 increases. On the other hand, since the load at the spot welds of the floor 25 increases, it will cause the spot welds to peel off and the floor 25 to be perforated.

[0038] In response to this, by arranging the first connection part 21 and the second connection part 22 such that the distances from the center of gravity point of the battery pack 10 are equal, the torques are equal. Therefore, it is possible to make the loads input to the first connection part 21 and the second connection part 22 also equal. Therefore, it is possible to equalize the loads on the floor 25 and the spot welds, so it is possible to suppress the peeling off of the spot welds and the perforation of the floor 25, and to withstand the side collision load at the second connection part 22, suppressing the development of the side collision.

[0039] Thus, it is possible to provide a battery pack for vehicle mounting that can suppress interference between the floor and the battery when a side collision load is input.

[0040] In addition, the present disclosure is not limited to the above content and can be appropriately changed without departing from the gist.

Claims

1. A battery pack for vehicle mounting, comprising a bracket 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 connecting part is connected to the floor reinforcement, the second connecting part is connected to a floor bracket connected to the floor at a position lower than 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.

2. The battery pack for vehicle mounting according to claim 1, wherein, the first connecting part and the second connecting part are arranged such that the distances from the center of gravity of the battery pack are equal to each other.

3. The battery pack for vehicle mounting according to claim 1, wherein, the second connecting part is arranged at a position closer to the exhaust pipe than the first connecting part.

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