Power battery applied to new energy vehicles

Abstract

The invention discloses a power battery applied to new energy vehicles. The power battery comprises a box body with an open upper end and a cover plate main body matched with the box body in a hinged manner, 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 plurality of radiating holes are formed in the lower section of the box body on the same side of the clamping groove; the radiating holes are inclined downwards along the direction vertical to the side wall of the box body; and the included angle formed by the axis of the radiating holes and the horizontal plane is 20-45 degrees. The radiating holes are inclined downwards in the direction from the inner side wall of the box body to the outer side wall of the box body, and simultaneously the included angle formed by the axis of the radiating holes and the horizontal plane is in the range of 20-45 degrees, so that impurities such as external dust are unlikely to enter the box body, and normal exchange and circulation of external air with heat inside the box body can be guaranteed at the same time 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 power battery applied to a new energy 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...

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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