Power battery system box body

Abstract

The invention discloses a power battery system box body. The box body comprises a battery box upper cover and a lower box body; a sealing ring is arranged between the battery box upper cover and the lower box body; an upper cover of the battery box is a non-bearing part and is formed by stamping a light-weight plate; the lower box body serves as a main accommodating component of the battery moduleand is formed by splicing and welding two side plates, a front plate, a rear plate and a bottom plate; the inner supporting beam assembly is arranged in the lower box body, so that the shock resistance of the box body is greatly improved; every two adjacent inner supporting assemblies form a battery module mounting chamber; a two-layer bracket is arranged at the rear end of the lower box body, sothat the space utilization rate is increased; and the box body anti-collision structure mounted on the outer side of the lower box body improves the anti-collision performance of the box body of thepower battery system. In conclusion, the space utilization rate is high, and the bearing requirement of a pure electric vehicle for a power battery system and auxiliary devices of the power battery system can be met; therefore, the problems that the space utilization rate of a power battery system box body of an existing pure electric passenger vehicle is not high, and the bearing performance andthe anti-collision performance are poor are solved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a case body of a power battery system. Background technique [0002] At present, lithium-ion batteries have the advantages of high specific energy, many cycle times, and long storage time. They are not only widely used in portable electronic devices such as mobile phones, digital cameras, and laptop computers, but also widely used in electric vehicles and electric bicycles. As well as large and medium-sized pure electric passenger vehicles such as electric tools, the safety performance requirements of lithium-ion batteries are getting higher and higher. [0003] The power battery system is the energy storage and supply system of pure electric passenger vehicles. It is an important component of pure electric passenger vehicles. Auxiliary components. Therefore, the space layout of the power battery system box is relatively strict, which can neither affect th...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a battery that can meet the load requirements of the pure electric vehicle for the power battery system and its auxiliary devices; solve the problem that the space utilization rate of the power battery system of the existing pure electric passenger car is not high. , bearing performance, poor crashworthiness and other problems of the power battery system box,

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