期刊
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
卷 165, 期 -, 页码 -出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2021.106968
关键词
Lithium-ion battery; Phase change material; Maximum temperature; Maximum temperature difference; Dynamic cycle
资金
- National Natural Science Foundation of China [51776067, 51821004, 52006070]
- China Postdoctoral Science Foundation [2020M680481]
- Central University [2019QN023]
The study shows that the battery pack with combined forced convection and PCM cooling has better thermal performance, with both the maximum temperature and maximum temperature difference controlled within the ideal range. Additionally, at an ambient temperature of 26.5°C, the phase change temperature of 35°C is most advantageous for the thermal management system.
A combined thermal management system for lithium-ion battery, which conjugates the air cooling and phase change material (PCM) cooling, is proposed. Based on the three-dimensional flow and heat transfer models coupled with electrochemical reaction, the thermal performances of battery pack during the discharge-charge cycles with natural convection only, combined natural convection and PCM cooling, and combined forced convection and PCM cooling are investigated and compared. The results show that the maximum battery temperature with natural convection only exceeds the optimum temperature at 1C. The thermal performance of battery pack with combined forced convection and PCM is superior to that with combined natural convection and PCM, and the maximum temperature and maximum temperature difference are both controlled within the ideal range at 2C. For combined forced convection and PCM cooling, the recommended PCM thickness is 2 mm for application considering both cooling performance and cost. The phase change temperature of 35 ?C is most advantageous to the proposed thermal management system at the ambient temperature of 26.5 ?C, and the maximum temperature and maximum temperature difference can still fall within the optimal operation criteria even at the ambient temperature of 35 ?C.
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