关键词: 电池热管理；液冷；AMESim；热分析

Abstract: The heat dissipation of lithium-ion battery pack has been an important factor affecting the power performance and safety of electro mobile. In this paper, a one-dimensional simulation model of liquid cooling system of lithium-ion battery pack was built based on AMESim software, in order to explore the effect of different cooling pipeline designs on the heat dissipation of lithium-ion battery pack. By comparing and analyzing the cooling effect of four different cooling structures, it is found that the maximum temperature and temperature difference of 4th structure are the lowest and the cooling effect is the best. The results show that the position of inlet and outlet of the flow passage, the branching situation of each branch and the contact area of the flow passage and the battery pack have different degrees of influence on the heat dissipation performance of the battery pack. The cooling effect of the battery pack can be significantly improved, the maximum temperature of the battery pack can be reduced, and the temperature uniformity of the battery pack can be improved by reasonable flow passage arrangement. This provides a reference for the structure design of liquid cooling system of lithium-ion battery.

Key words: Battery thermal management; Liquid cooling; AMESim; Thermal analysis