Thermal Simulation and Experimental Validation of FSEC Lithium-Ion Battery Packs

Abstract

With the rapid popularization of new energy vehicles around the world, Chinese college formula racing competitions are increasingly receiving widespread attention from college students. As the core component of electric racing cars, the thermal safety of lithium battery systems deserves in-depth research. Battery thermal modeling, real-time and effective thermal monitoring, and thermal management are crucial for the safe, efficient, and reliable operation of battery systems. This article will take the battery system of pure electric racing cars as the research object, combined with FSEC dynamic competition, through experimental and theoretical combination, select battery cells and design modules. A new battery box is designed through CATIA, and the best battery box is obtained through ANSYS static and thermodynamic simulation. The rationality of the battery box is verified through experiments and actual vehicle testing. Through a series of experiments, it is found that: The consistency of each battery cell is relatively stable. In terms of capacity, the capacity of the actual vehicle decreases by 5% during running, which can effectively complete the cycle durability working condition. According to the temperature chart, in an environment of 20 ℃, the temperature rise of the electric vehicle during running does not exceed 25 ℃, and the temperature difference is 4.5 ℃, which is consistent with the simulation model of battery box heat dissipation and meets the requirements of good heat dissipation.