Research on Battery Thermal Management of Pouch Cell Using a Phase Change Material-Based Thermal Switch
WANG Zexu,
HE Kehan,
SUN Chen,
LI Kaixuan,
JU Xing
Affiliations
WANG Zexu
Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education (North China Electric Power University), Changping District, Beijing 102206, China
HE Kehan
Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education (North China Electric Power University), Changping District, Beijing 102206, China
SUN Chen
Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education (North China Electric Power University), Changping District, Beijing 102206, China
LI Kaixuan
Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education (North China Electric Power University), Changping District, Beijing 102206, China
JU Xing
Key Laboratory of Power Station Energy Transfer Conversion and System of Ministry of Education (North China Electric Power University), Changping District, Beijing 102206, China
In view of the battery thermal management system, this paper proposed a new battery temperature control device based on the phase change material stearic acid and thermal switches. The device is applied to the pouch cell. The cooling and heat preservation abilities were studied based on numerical simulation. It provides the passive drive for the thermal switch based on the volume change characteristics of the organic phase change material stearic acid during the phase change process, which can effectively dissipate heat when the battery temperature increases. Thermal energy dissipation is decreased when the battery is used in a cold environment. The numerical results show that, compared with the battery without the thermal management system, the temperature control system with the phase change material and thermal switch reduces the battery temperature by 22.46 ℃ at the end of the 4 C rate charge and discharge. When the external ambient temperature is -20 ℃, the novel thermal management system prolongs the battery temperature management time by 390 s.
