Simulation analysis of battery thermal management system for electric vehicles based on direct cooling cycle optimization

With the growing demand for high energy flux density in vehicle power batteries, the increased heat generation during the charge and discharge processes of power battery packs presents new challenges for battery thermal management systems (BTMS). The control of battery module temperatures is crucial for determining both the lifespan of the modules and driving safety. Therefore, this paper designs a novel Integrated Thermal Management System (ITMS) for electric vehicles, aiming to address the cooling issues of power battery packs under hightemperature and high-speed operating conditions. Compared to previous studies, this system can reduce the temperature difference between battery modules without compromising the coefficient of performance (COP). Simulation results on the AMESim platform validate that the new ITMS effectively controls the maximum temperature of the battery modules, reduces the temperature difference between them, and does not increase system energy consumption. In fact, the system even enhances the COP to some extent. Furthermore, this paper proposes an accompanying control strategy to further improve the thermal management performance. Specifically, the system reduces the maximum temperature of the battery modules by 7.0 degrees C and the temperature difference between the modules by 7.4 degrees C.