Effect of liquid cooling system structure on lithium-ion battery pack temperature fields

Abstract

In this article, we studied liquid cooling systems with different channels, carried out simulations of lithium-ion battery pack thermal dissipation, and obtained the thermal distribution. According to the results shown in the study, the number of channels is inversely proportional to the highest temperature and the temperature dispersion. A liquid cooling system with a square channel can achieve a lower highest temperature than that of a liquid cooling section with a circular channel. Simultaneously, the highest temperature is also negatively correlated with the rectangular channel aspect ratio. In addition, as the aspect ratio increases, the temperature dispersion of the battery pack initially decreases and then increases. Furthermore, from the entrance, along the direction of coolant flow, the temperature dispersion of a single lithium-ion battery will initially increase and then gradually decrease, which indicates that the No. 5 lithium-ion battery is the most balanced module in the battery pack.