Electric Vehicle Battery Heating System
Phase change material cooling system
The phase change material cooling system uses phase change materials as the heat transfer medium, and uses the characteristics of phase change materials that can store and release energy when the phase change occurs to achieve the effect of low-temperature heating and high-temperature heat dissipation for the power battery. However, the thermal conductivity of phase change materials is relatively low. In order to change the inherent defects of materials, people fill some metal materials into phase change materials. For example, in some studies, very thin aluminum plates are filled into phase change materials to improve thermal conductivity. the goal of. In order to improve the thermal conductivity of phase change materials, it has also been proposed to fill carbon fibers, carbon nanotubes, etc. into phase change materials.
Heat pipe cooling system
As an efficient heat conduction element, a heat pipe can quickly and efficiently transfer heat energy from one place to another, that is, it can quickly and effectively transfer heat between two objects.
In the thermal management system of electric vehicles, many scholars at home and abroad have also applied the heat pipe, a heat conduction element, to the heat dissipation of power batteries. Compared with the traditional forced convection heat dissipation system, in the heat dissipation system that introduces heat pipes, the power battery can not only be maintained within the normal operating temperature range, but also the temperature uniformity between each battery cell can be maintained, which is forced cooling. The effect that the cooling system cannot achieve. However, its mass and volume are too large, and there is a heat transfer limit
