Battery box with waterproof structure

Abstract

The invention provides a battery box with a waterproof structure. The battery box comprises a battery box upper cover and a battery box lower box body connected through a fastening part, wherein a sealing strip is arranged between the battery box upper cover and the battery box lower box body; a stepped structure including two times of downward bending and one time of outward turning is arranged on the edge of the battery box upper cover to form a first upper cover lower bending part, an upper outer turning edge and a second upper cover lower bending part connected in sequence; the edge of the battery box lower box body is integrally bent upwards, then pressed downwards completely, and then turned outwards to form a lower box inner turning edge, a lower box upper bending part, a lower box body top complete-pressing edge and a lower box outer turning edge connected in sequence. According to the battery box, the sealing strip is mounted in a sealed space formed by the bending turning edges of the battery box upper cover and the battery box lower box body, so that the sealing strip can be prevented from extending towards two sides, and the compression amount of the sealing strip can be ensured; and the adjustment of the compression amount of the sealing strip can be realized by controlling the distance from the bottom of the second upper cover lower bending part to the inner turning edge of the box body.

Description

technical field [0001] The invention relates to the technical field of lithium batteries for automobiles, in particular to a waterproof structure for a battery box. Background technique [0002] The manufacturing process of the battery box for an electric vehicle includes: first connecting a plurality of batteries in series and / or in parallel to form a battery module, and then connecting a plurality of battery modules in series and / or in parallel to form a battery box. The battery box is the power source of electric vehicles and is its core component. The safety of the battery box directly affects the safety of the entire vehicle. [0003] According to different cooling methods, the battery box includes water-cooled battery box and air-cooled battery box. Since the output voltage of the battery box for electric vehicles is as high as 200V, and the intrusion of water will cause a short circuit, the battery box must be strictly sealed to prevent water from entering. , The...

AI Technical Summary

Problems solved by technology

[0005] First, the protection level that this sealing structure can achieve is generally below IP66, which cannot meet the higher protection level requirements:

[0006] Second, for a battery box with a large box volume, the gasket is generally made of multiple gaskets, and seal failure is prone to occur at the interface between the gasket and the gasket;

[0007] Third, the sealing gasket is locked and compressed between the upper cover and the lower box, which is prone to excessive or insufficient compression of the gasket, resulting in seal failure;

[0008] Fourth, the gasket extends to both sides during the compression process, so that the gasket does not reach the required compression amount after being locked in place, thus affecting the sealing performance

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