期刊
JOURNAL OF ENERGY STORAGE
卷 51, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2022.104477
关键词
Lithium ion battery safety; Thermal runaway propagation; Lithium iron phosphate; Ceiling
资金
- National Key R&D Program of China [2021YFB2402001]
- Fundamental Research Funds for innova-tion and entrepreneurship with University of Science and Technology of China [GXXT-2020-079]
- University Synergy Innovation Pro-gram of Anhui Province [WK2320000051]
- Fundamental Research Funds for the Central Universities [Y201768]
- Youth Innovation Promotion Association CAS
This study investigates the thermal runaway propagation behaviors of large format lithium ion battery modules under different inclined ceilings. The results show that a larger ceiling angle provides better heat dissipation condition for the modules, and the threshold value of ceiling angle at which thermal runaway stops propagating is between 10 and 30 degrees.
Currently, the horizontal ceiling structure is widely adopted in large format battery systems. Thus systematically investigating the thermal runaway (TR) propagation behaviors features of large format lithium ion battery modules under different inclined ceilings is of importance for the safety design and protection of battery systems. This work focuses on the experimental phenomenon elucidation and theoretical analysis of the single cell TR and its propagation. Firstly, a single cell test is carried out to investigate the TR behavior features of target battery. Then, four sets of TR propagation tests with different ceiling angles (0 degrees, 10 degrees, 30 degrees, 90 degrees) are performed to explore the effect of inclined ceiling angle on TR propagation. Besides, a set of 0 degrees ceiling angle experiment with fireproof barriers is conducted to study the blocking effect of barriers. Results show that a larger ceiling angle provides a better heat dissipation condition for modules, and the threshold value of ceiling angle at which TR stops propagating is between 10 and 30 degrees. The barriers cannot block the TR propagation but great delay and weaken the propagation process. This study helps to enhance the insight of TR propagation behaviors and provides valuable guidance for the relative researchers and engineers.
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