Double-sealing structure type battery pack box body and electric vehicle

Abstract

The invention discloses a double-sealing structure type battery pack box body and an electric automobile, the battery pack box body comprises a lower box body and an upper box body, the upper box body is provided with a first annular side wall, the lower box body is provided with a second annular side wall, the first annular side wall and the second annular side wall are respectively provided with a first annular flange and a second annular flange which extend outwards, a first annular sealing piece is arranged between the two; a second annular sealing piece is arranged between the first annular side wall and the second annular side wall in an up-down pressing connection mode. According to the scheme, the first annular flange and the second annular flange form the space capable of accommodating the first annular sealing element, and the space between the side walls of the upper box body and the lower box body is used as the space for accommodating the second annular sealing element, so that two seals are formed, and double seals of the battery pack box body can be realized on the premise of simple processing and lower cost. The second annular sealing piece adopts an up-down compression joint mode, the assembly is simple, dust, water and the like are more easily prevented from entering, and the sealing effect of the second sealing piece is improved.

Description

technical field [0001] The invention relates to the field of electric technology, in particular to a double-sealed structural battery pack box and an electric vehicle. Background technique [0002] The rapid development of the automobile industry is facing a series of problems such as energy shortage and environmental pollution. Safety, energy saving and environmental protection have become the themes of the development of the automobile industry. To achieve this goal, the development of electric vehicles has become an inevitable trend. The high-voltage battery of electric vehicles has high requirements on the sealing ability of the system, especially the sealing ability of the battery pack, such as dustproof and waterproof need to meet the requirements of IP67. [0003] At present, the sealing schemes for the assembly of the upper and lower boxes of the battery pack mainly include: [0004] 1) The upper and lower boxes of the battery pack are directly bonded with sealant....

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the force of the sealing strip is single, the sealing contact points are relatively small, and the sealing effect is difficult to guarantee.

[0006] For the second method, in order to improve the sealing performance, the structure of the sealing strip is improved in the prior art. For example, Chinese patent 201711429675.8 discloses a "battery pack and its sealing mechanism", and the sealing strip is a "lip structure" , although the sealing performance of the connection between the upper box and the lower box of the battery pack can be improved to a certain extent, the manufacturing process of the "lip structure" is complicated and the processing cost is high

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