Power battery box for electric vehicle

Abstract

The invention relates to the technical field of electric vehicles, in particular to a power battery box for an electric vehicle. The power battery box comprises a box cover and a box body, wherein a lining is connected to the inner wall of the box body and filled with a phase change material; and the box body is formed by extruding molding of an aluminium alloy material. The box body is small in density, lighter in weight, convenient to process and manufacture and low in processing cost; meanwhile, the lining is connected to the inner wall of the box body, and can enhance the integral rigidityand strength of the box body, play the role of vibration and energy absorption and improve the protective capability of the box body; and the lining is filled with the phase change material, and thephase change heat accumulation principle of the phase change material is utilized to assist a heat management system in temperature adjustment of the battery box, so that the temperature in the battery box can meet the requirements on the performance and the service life of a power battery, and the power battery can efficiently work at an appropriate temperature.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to an electric vehicle power battery box. Background technique [0002] With the increasingly serious energy crisis and environmental pollution, countries are paying more and more attention to the development of new energy vehicles, especially pure electric vehicles, which have the characteristics of zero emission, low noise and high energy efficiency, and are one of the ideal energy-saving and environment-friendly vehicles. With the continuous improvement of power battery performance, the cruising range has been significantly improved, and it has been vigorously promoted in European and American countries. Because its impact on the environment is relatively small compared with traditional cars, its prospects are widely optimistic. [0003] As the only power source for pure electric vehicles, the power battery directly affects the performance and service life of the vehicl...

AI Technical Summary

Problems solved by technology

[0004] (1) The technical problem to be solved by the present invention is: the existing battery box uses flexible heating film or PTC to heat, and adopts air cooling or liquid cooling to dissipate heat, which involves many devices and complicated protection, which reduces the reliability of the system , which increases the risk of failure, and the cost is high; at the same time, the battery box is relatively heavy, there is thermal stress deformation, and the rigidity and strength of the box are poor

Images