Battery thermal modeling and effective cooling/heating methods

This chapter introduces the key issues of battery thermal management system (BTMS) in practical application, including the battery thermal modeling and effective cooling/heating methods. Regarding the adverse impact of high-temperature environment and large discharge rate on lithium-ion batteries, a direct contact liquid-based BTMS equipped with multichannel is developed and optimized. A numerical simulation model is proposed to depict the thermal performance of the BTMS. After the optimization of the key parameters, the proposed BTMS achieves excellent thermal performance and lightweight. Considering the dramatic reduction of the battery performance, for batteries used in low-temperature applications, a hybrid self-heating method (HSHM) is suggested. The HSHM is of great value to be applied extensively to heat the cells thanks to its inexpensive cost, high-temperature increase rate, minimal energy consumption, and other characteristics. Besides, the future work is desirable for the three aspects to further improve the battery thermal control technology. Our work facilitates a guideline for realizing the optimal design and control of BTMS.