Electric vehicle battery system that can be increased or decreased by using the lower body as the battery box

Abstract

The invention relates to an electric vehicle battery system that can be increased or decreased by using the lower vehicle body as a battery box, comprising a single battery pack (100), a main control box (200), a connecting wire harness (300), and an underfloor (400) , the upper layer of the floor, the lower body (600), and the sealing plate (700), which are characterized in that: the single battery pack (100) is connected to the lower body (600) by bolts (108), and the main control box (200) is connected by bolts (108) is connected with the lower car body (600), the lower floor (400) is welded together with the lower car body (600), relatively fixed, and the single battery pack connector (301) is installed on the lower floor (400) by threaded connection. ), the main control box connector (303) is also installed on the lower floor (400) through threaded connection, and the present invention uses the lower vehicle body as the box body of the battery box, so that the theoretical design of the stiffness and strength of the whole vehicle is more reasonable; Inventing multiple single battery packs to form a battery system reduces the requirements for the structure and installation structure of the single battery packs.

Description

technical field [0001] The invention relates to the structure of an electric vehicle battery system, in particular to an electric vehicle battery system which utilizes the structure of the lower vehicle body as a battery box and can increase or decrease independent battery packs as required. Background technique [0002] The battery box is an important part of the electric vehicle. The design of the battery box structure and the skeleton structure around the battery box are directly related to the rigidity, strength and other performance of the vehicle, and also have a great relationship with the safe working condition of the battery pack; the traditional The battery box and its surrounding structures are basically an independent battery box installed on the underframe of the vehicle body. The battery packs connected in series and parallel are accommodated in the box. The weight is relatively large, which has higher requirements on the structure and performance of the box; s...

AI Technical Summary

Problems solved by technology

[0002] The battery box is an important part of the electric vehicle. The design of the battery box structure and the skeleton structure around the battery box are directly related to the rigidity, strength and other performance of the vehicle, and also have a great relationship with the safe working condition of the battery pack; the traditional The battery box and its surrounding structures are basically an independent battery box installed on the underframe of the vehicle body. The battery packs connected in series and parallel are accommodated in the box. The weight is relatively large, which has higher requirements on the structure and performance of the box; second, the number of battery cells in the independent battery box is relatively large. During use, if some battery cells have problems, the entire battery box will All need to be replaced; thirdly, electric vehicles on the market are now equipped with battery boxes of different capacities according to different cruising ranges, which require different configurations of the same car, and a variety of battery boxes are required to match; fourthly, the battery box The size is large. In order to meet the rigidity of the whole vehicle, some battery boxes have to be very rigid, so as to contribute to the stiffness of the whole vehicle. Some girders around the battery box are made very strong, resulting in a certain waste of space structure.

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