Analysis of characteristics of power battery thermal management in hot and cold double working conditions.

MI Guoqiang; XU Hongyu; LIANG Kunfenga; LI Yachao; WANG Moran

Based on the principle of phase change heat transfer and thermal siphon of the refrigerant, a power battery thermal management system with hot and cold double working conditions was presented, and the system did not require a pump to drive. For the certain 17 Ah lithium battery, the heat exchange efficiency of the designed thermal management system was tested through experiment. The results show that the system can realize the operation switching management of cooling and heating two-way modes based on high or low temperatures. Under the heating condition, the power difference of the battery box in many groups of experiments is 1. 2% to 3. 8%, and the heating performance of thermal management system of the battery box is better. Under the cooling condition, the system cooling power reaches the maximum of 88.4 W at the battery temperature of 70 °. Compared with natural cooling, the condenser forced air cooling can increase the cooling power by 10.0%~63.9%.

Journal of Henan University of Science & Technology, Natural Science, 2021, Vol 42, Issue 2, p23

1672-6871

Academic Journal

10.15926/j.cnki.issn1672-6871.2021.02.005