Battery box for electric vehicle

Abstract

The invention discloses a battery box for an electric vehicle. The battery box comprises a box body and a cover plate main body, wherein a buckle is mounted at the end part of the cover plate main body through an elastic connecting piece; a clamping groove matched with the buckle is formed in the side wall of the box body; a battery pack is fixed in the box body; a balance system is mounted on the battery pack; a through hole is formed in the side wall of the box body on the same side of the clamping groove; support plates are mounted on two side walls of the through hole respectively; a plurality of swing plates are arranged side by side in an up-and-down manner and are arranged on the two support plates in a rotating manner, a left wing plate and a right wing plate are fixed at two ends of each swing plate respectively, and the end parts of each left wing plate and each right wing plate are balanced with the two ends of the corresponding swing plate; the left wing plates extend upwards, the right wing plates extend downwards, and the lengths of the right wing plates are greater than those of the left wing plates. When the temperature inside the box body is gradually reduced, the swing plates are restored to previous inclined state due to gravity difference at two ends of the swing plates, so that the through hole is sealed again, and the impurities such as external dust are unlikely to enter the box body so as to guarantee normal operation of the battery pack.

Description

technical field [0001] The invention relates to a battery pack of an electric vehicle, in particular to a battery box for an electric vehicle. Background technique [0002] In order to protect the environment, energy conservation and environmental protection and the promotion and application of green energy have emerged in response to the situation. One of the ways to protect the environment is to expand the use of electric vehicles and reduce the use of fuel-efficient vehicles, but now electric vehicles have been in a downturn , The main bottleneck restricting the development of electric vehicles is the life of power batteries. Generally speaking, the battery box of an electric car needs 75 lithium-ion batteries in series to supply power to reach 200AH / 300V. Each lithium-ion battery is connected in series to form a battery pack. Because the aging degree of each lithium-ion battery in the battery pack is very different , in the process of charging the battery pack, there is...

AI Technical Summary

Problems solved by technology

However, after the battery box is loaded with a battery pack, the space between the battery pack and the upper cover of the battery box is small, and the existing equalization system is generally large in size and cannot be placed inside the battery box. Therefore, the existing equalization system is generally placed in the battery box The exterior takes up a lot of space outside the car. Under the premise that the space of the car is so compact, the market is eager to place the equalization system inside the battery box without changing the size of the original battery box, so as to save the space of the car.

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