Simulation and Experimental investigation of Battery Thermal Management System for a Hybrid Vehicle

Abstract As a essential component in battery pack, thermal management system plays a vital role in controlling battery temperature, prolonging battery lifetime, enhencing battery safety. A battery liquid cooling system for hybrid vehicle is described in this paper. Based on vehicle thermal requirement, the battery thermal system design is optimized by 3D CFD simulation and thermal analysis in STAR-CCM+. Simulation result shows that the targets of battery thermal system can be fulfilled. Two use cases are analyzed in battery bench test, same as the simulation use cases. Comparing simulation result with bench test, it shows that the deviation of battery maximum temperature in high-temperature conditions is 1.8% and in low-temperature condition is 11%. A complete development process of battery TMS is illustrated in this paper and provide research direction for cooling plate optimization and bench test method.