Generally speaking, the heat dissipation of the battery when charging the electric vehicle is mainly the use of air cooling cooling method, that is, in natural cooling (natural cooling is to install a heat dissipation device with high thermal conductivity on the power battery pack, and use the gap between it and the battery cell to directly distribute the heat generated when the battery is charged and discharged into the air), on the basis of adding a fan with heat sink. To increase the heat dissipation area, and the use of fans to speed up the air circulation, the battery charge and discharge generated by the heat acceleration in the air.