In this article, the immersed lithium-ion battery module’s liquid cooling and heat dissipation scheme are studied, and the heat dissipation characteristics of the large-capacity battery module after the battery is grouped are analyzed. The simulation models of the liquid cooling system’s five inlet and outlet layouts are established. The numerical results show that immersed liquid cooling method can effectively prevent and reduce the temperature rise of large-capacity battery modules. The layout of the imports and exports can influence the heat transfer effect, which is of guiding significance for the design of immersed protective fluid heat dissipation of lithium-ion battery modules.

In order to realize the problem of efficient heat dissipation management of lithium battery modules, the thermal management model of liquid cooled lithium-ion battery modules is studied in this paper. The entropy increase characteristics caused by the flow process and heat transfer process of the lithium-ion battery module under three liquid cooling inlet and outlet modes are analyzed by numerical simulation, and the internal mechanism of the local entropy generation characteristics of the lithium-ion battery module is clarified. The numerical results show that the 3×3 MIMO is the best model considering the heat dissipation and fluidity of the protective fluid. In addition, the results of this study can provide effective design guidance for thermal management of lithium-ion batteries.