Study on heat dissipation structure of air-cooled Lithium ion battery module

Abstract

The battery cooling system is an important part of the battery thermal management system. Its main function is that when the battery temperature is too high, it can carry out effective heat dissipation to reduce the battery surface temperature, and reduce the temperature difference to ensure the stability of the battery temperature field. In this paper, a simplified model of air - cooled lithium - ion battery module is established, and based on computational fluid dynamics (CFD) theory, Fluent software was used to simulate the temperature field and flow field of the battery module in different inlet directions. The influence of the distance between the battery and the air inlet wind speed on heat dissipation was simulated. Under the condition of comprehensive consideration of the battery volume energy density and heat dissipation energy consumption, the final result is that the heat dissipation structure of the air-cooled battery module reaches the optimal when the lateral ventilation is used, the battery spacing is 5 mm, and the wind speed is set at 4 m/s.