Numerical Calculation of Temperature Field of Energy Storage Battery Based on Finite Element Method and Analysis of Influencing Factors

The heat dissipation performance of energy storage batteries is of great importance to the efficiency, life and safety of the batteries. An energy storage battery module with 60 series large cylindrical battery cells and a rated capacity of 11.52 KWh is designed. A numerical calculation model of the fluid-temperature field coupling of the battery module is established based on the finite element method, and the heat generation power of the battery cells at different charge/discharge multipliers is estimated by the measured data, which is used as the homogeneous heat source for the numerical calculation model, and the air flow rate of the air duct inside the battery module is analyzed. The air flow rate of the air duct inside the battery module and the distribution law of the temperature field of the battery pack are analyzed, and the validity of the numerical calculation results is verified by using the charging and discharging temperature rise and wind speed tests of the prototype energy storage battery module.