On-vehicle battery pack

Abstract

To provide an on-vehicle battery pack capable of increasing battery loading capacity while suppressing damage to an upper cover caused by burrs.SOLUTION: An on-vehicle battery pack includes a metal lower case, a resin upper cover, a bolt that fastens the lower case and upper cover, and a metal plate arranged between the upper cover and the bolts, with the portion of the metal plate that comes into contact with the upper cover being chamfered.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] A configuration is disclosed in which a lower case and an upper cover of the battery pack are fastened together with bolts. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4670382 Summary of the Invention [Problem to be solved by the invention]

[0004] If the upper cover is made of resin, there is a concern that cracks may occur near the R part between the vertical wall of the upper cover and the flange when the bolt is fastened, or that the resin part of the bolt seating surface may be scraped off. For this reason, a metal plate is often inserted between the upper cover and the bolt as a countermeasure, but since the metal plate is manufactured by pressing, burrs are generated.

[0005] One possible solution to prevent burrs from damaging the plastic upper cover is to bend the metal plate into an L-shape. However, bending the metal plate into an L-shape reduces the space available for arranging the battery cells, which creates the problem of reduced battery load capacity.

[0006] The present disclosure has been made in consideration of the above, and aims to provide an in-vehicle battery pack that can increase battery loading capacity while suppressing damage to the upper cover caused by burrs. [Means for solving the problem]

[0007] The vehicle battery pack of the present disclosure comprises a metal lower case, a resin upper cover, bolts fastening the lower case and the upper cover, and a metal plate arranged between the upper cover and the bolts, and the portion of the metal plate that comes into contact with the upper cover is chamfered. Effect of the Invention

[0008] According to the present disclosure, by chamfering the portion of the metal plate that comes into contact with the upper cover, damage to the upper cover caused by burrs can be suppressed. Also, by chamfering the portion of the metal plate that comes into contact with the upper cover, the space for arranging the battery pack is increased compared to when the metal plate is formed into an L-shape, and therefore the battery loading capacity can be increased. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a cross-sectional view showing the configuration of an in-vehicle battery pack according to an embodiment. [Diagram 2] FIG. 2 is a perspective view showing the configuration of an upper cover and a metal plate of the vehicle-mounted battery pack according to the embodiment. [Diagram 3] FIG. 3 is a perspective view showing the configuration of a metal plate of the vehicle-mounted battery pack according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing the configuration of a conventional vehicle-mounted battery pack. [Diagram 5] FIG. 5 is a perspective view showing the configuration of a metal plate of a conventional vehicle-mounted battery pack. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] An in-vehicle battery pack according to an embodiment of the present disclosure will be described with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by a person skilled in the art, or those that are substantially the same.

[0011] (Automotive battery pack) The configuration of an in-vehicle battery pack according to an embodiment will be described with reference to Figures 1 to 5. The in-vehicle battery pack according to an embodiment is mounted on, for example, a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHEV), or an electric vehicle (BEV: Battery Electric Vehicle).

[0012] 1 to 3, the vehicle-mounted battery pack according to the embodiment includes a lower case 1, an upper cover 2, bolts 3, and a metal plate 4. Although not shown in the figures, a plurality of battery cells are arranged in the storage space defined by the lower case 1 and the upper cover 2.

[0013] The lower case 1 is a member that constitutes the bottom surface of the storage space for the battery cells. The lower case 1 is made of a metal material.

[0014] The upper cover 2 is a member that constitutes the side and top surfaces of the storage space for the battery cells. The upper cover 2 is made of a resin material.

[0015] The bolt 3 is a member for fastening and fixing the lower case 1 and the upper cover 2. A metal plate 4 is disposed between the upper cover 2 and the bolt 3.

[0016] The metal plate 4 is a member for preventing scraping or cracking of the resin-made upper cover 2 when the lower case 1 and the upper cover 2 are fastened together with the bolts 3. The metal plate 4 has a chamfered portion at the portion that comes into contact with the upper cover 2. That is, the metal plate 4 has a chamfered portion 41 at the portion that comes into contact with the upper cover 2. The chamfered portion 41 is formed for the purpose of removing burrs from the edge when the metal plate 4 is manufactured by, for example, press working.

[0017] 4 and 5 show an example of the configuration of a conventional vehicle-mounted battery pack. As shown in the figures, the conventional vehicle-mounted battery pack includes a metal lower case 101, a resin upper cover 102, and bolts 103 that fasten the lower case 101 and the upper cover 102 together. In addition, the conventional vehicle-mounted battery pack has a metal plate 104 disposed between the upper cover 102 and the bolts 103.

[0018] 4, metal plate 104 is bent into an L shape so as to prevent burrs from damaging resin upper cover 102. Therefore, in a conventional vehicle-mounted battery pack, as shown in part B in the figure, a certain gap is formed between the L-shaped portion of metal plate 104 and the vertical wall of upper cover 102. As a result, in a conventional vehicle-mounted battery pack, the space for arranging battery cells is reduced by the amount of this certain gap.

[0019] Therefore, in the vehicle-mounted battery pack according to the embodiment, the metal plate 4 is not made L-shaped, but the portion of the metal plate 4 that comes into contact with the upper cover 2 is chamfered. By chamfering the portion of the metal plate 4 that comes into contact with the upper cover 2 in this way, the standing wall of the upper cover 2 can be moved toward the outside of the vehicle (by a predetermined gap at part B in FIG. 4). As a result, the internal space of the vehicle-mounted battery pack can be expanded compared to the conventional L-shaped metal plate 104 (see FIG. 4).

[0020] According to the vehicle-mounted battery pack of the embodiment described above, by chamfering the portion of the metal plate 4 that comes into contact with the upper cover 2, damage to the upper cover 2 caused by burrs can be suppressed. Furthermore, by chamfering the portion of the metal plate 4 that comes into contact with the upper cover 2, the space for arranging the battery cells is increased compared to when the metal plate 4 is formed into an L-shape, and therefore the battery loading capacity can be increased. In other words, according to the vehicle-mounted battery pack of the embodiment, it is possible to suppress harm to the upper cover 2 by the metal plate 4 without reducing the battery loading capacity.

[0021] Further advantages and modifications may readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof. [Explanation of symbols]

[0022] 1,101 Lower case 2,102 Upper cover 3,103 Volts 4,104 Metal Plates 41 Chamfer

Claims

[Claim 1] A metal lower case and Resin upper cover, a bolt for fastening the lower case and the upper cover together; a metal plate disposed between the upper cover and the bolt; Equipped with A portion of the metal plate that comes into contact with the upper cover is chamfered. Automotive battery pack.

Images