Air cooled electric automobile battery thermal-management device containing phase change material

Abstract

The invention discloses an air cooled electric automobile battery thermal-management device containing a phase change material. The device comprises an interlayer sleeved on the outer wall of a battery, wherein an inner casing of the interlayer is fit with the outer wall of the battery; a porous medium is filled between the inner casing and an outer casing of the interlayer; the phase change material is filled in holes of the porous medium; radiating fins are arranged on the outer casing of the interlayer. Heat emitted from the battery is transmitted to the inner casing of the interlayer through heat conduction, transmitted to the outer casing of the interlayer through a porous medium frame and finally emitted out through the radiating fins in an air cooled way, and the phase change material filled in the holes of the porous medium can ensure that the temperature of the battery is kept within a constant optimal operation temperature range. The device has a simple structure, is easy to manufacture and convenient to popularize and apply, and simultaneously, can ensure that the temperature in the battery is uniformly distributed and that the temperature of the battery is kept within an optimal operation temperature range.

Description

technical field [0001] The invention relates to the field of battery heat management, in particular to an air-cooled electric vehicle battery heat management device containing phase change materials. Background technique [0002] Batteries are one of the core components of electric vehicles and hybrid vehicles, and their performance directly affects the performance of electric vehicles and hybrid vehicles. However, due to technical constraints, it is difficult to make major breakthroughs in the performance of power batteries in the short term. Therefore, if the electric vehicle is to be commercialized, it is necessary to ensure that the battery works under optimal conditions to improve its performance and prolong its life. The power battery pack used in electric vehicles is composed of multiple battery modules connected in series and parallel. During the charging and discharging process of the battery, heat will be generated, which will increase the overall temperature of th...

AI Technical Summary

Problems solved by technology

[0002] Batteries are one of the core components of electric vehicles and hybrid vehicles, and their performance directly affects the performance of electric vehicles and hybrid vehicles. However, due to technical constraints, it is difficult to make major breakthroughs in the performance of power batteries in the short term. , if the electric vehicle is to be commercialized, it is necessary to ensure that the battery works under optimal conditions to improve its performance and prolong its life

The power battery pack used in electric vehicles is composed of multiple battery modules connected in series and parallel. During the charging and discharging process of the battery, heat will be generated, which will increase the overall temperature of the battery pack, and when the temperature is too high, it will seriously affect the performance of the battery. life, or even directly lead to battery failure

At the same time, when charging and discharging, the heat release or uneven heat dissipation of each single cell in the battery pack will cause temperature differences in the battery pack, and batteries with high local temperatures will age faster, and long-term operation will destroy the consistency of the battery pack, thus causing battery pack failure

On the other hand, when the battery works at low temperature, the battery voltage and discharge capacity will be greatly reduced, and the temperature is low to a certain extent, which may cause the electric vehicle to fail to start or run normally.

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