In terms of battery raw material testing, it can be used to test the melting point of the diaphragm, the reaction between the cathode material and the electrolyte, the volatilization of the solvent, dehydration and drying, the reaction and decomposition weight loss, and the tensile and puncture resistance of the diaphragm. From the aspect of thermal management design, the thermal diffusion, specific heat and thermal conductivity can be measured. From the aspect of thermal safety of battery, it is possible to study its risk and thermal safety.