Abstract: The thermal characteristics and thermal properties of a vehicular lithium ferro phosphate traction batterie is studied by experimental measurement and numerical simulation in this paper. Firstly, the internal resistance and entropy weight coefficient of battery are measured by experiments and Bernardi equation is adopted to calculate the time-varying heat source of battery. Then the calorimeter and transient hot-wire thermal conductivity tester are used to measure thermal property parameters such as the specific heat capacity and thermal conductivity of battery. Finally, a simulation on the temperature rise characteristics of both the cell and the module is conducted by using CFD software with consideration of the boundary conditions of natural convection and thermal radiation. The results show that the temperature-rise under high temperature environment is less than that under low temperature, and under the natural convection condition, the battery module has poorer temperature evenness so needs a better thermal management strategy

Key words: lithium ferro phosphate traction battery; thermal characteristics; thermal properties; experimental measurement; numerical simulation