This scheme is applied to the new energy vehicle square power battery scheme. When the battery temperature is too low, the square battery module is heated by the heating plate, and then the heat is transmitted to the non-uniform heating cell or module through the thermal silicone pad, so as to quickly reach the required temperature of the working condition; When the temperature of the battery is too high, the heat is transferred to the water cold plate or the outside of the shell through the thermal conductive silica gel (pad) to achieve the purpose of rapid cooling.