车用锂离子电池直冷热管理系统用冷媒研究进展

The direct-cooling thermal management system is one of the feasible solutions for the future advanced thermal management system of electric vehicles, which has great potential in terms of vehicle weight reduction and temperature consistency management. Refrigerants are the critical components for direct-cooling thermal management system that directly impact the refrigeration capacity, efficiency and safety. Selecting an effective and suitable refrigerant is especially important for direct-cooling thermal management systems. In this paper, the refrigerants for the direct-cooling thermal management system in recent years is reviewed. First, the thermal management requirements of the lithium-ion batteries and the performance of the direct-cooling thermal management systems are introduced based on electric vehicle applications. Then the definitions and characteristics of commonly used refrigerants are systematically analyzed. The next part introduces the research progress of the pure refrigerants and mixed refrigerants in detail. Finally, the problems and future prospects of the refrigerants are summarized, and feasible research directions for refrigerants in thefuture direct-cooling thermal management systems are proposed.