期刊
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
卷 149, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2019.119178
关键词
Lithium ion battery safety; ARC test; Self-heating reaction; SADT; SOC
资金
- National Key R&D Program of China [2016YFB0100306]
- National Natural Science Foundation of China [51674228, 51976209]
- Fundamental Research Funds for the Central Universities [WK2320000040]
- Open Project Program of State Key Laboratory of Fire Science, University of Science and Technology of China [HZ2019-KF08]
- Youth Innovation Promotion Association CAS [2013286]
Thermal runaway of lithium ion batteries (LIBs) attracts more and more attentions. In this paper, the self-heating reaction of LIBs with different states of charge (SOCs) is investigated by the standard accelerating rate calorimeter (ARC). The onset temperature of self-heating and trigger temperature of thermal runaway are measured. The kinetics of self-heating reaction is obtained, and the self-accelerating decomposition temperatures (SADTs, i.e. the maximum safe storage temperature) are calculated based on thermal explosion model (Semenov model and Thomas model). The results show that the fully-charged LIB (18650-type, Li(Ni0.5Co0.2Mn0.3)O-2/graphite) self-ignites if the storage temperature exceeds 149.6 degrees C under the natural convection condition (the battery surface heat transfer coefficient is 10 W m(-2) K-1). The logarithmic relationship between SADT and heat dissipation condition suggests that it is effective to reduce the fire risk of LIB by modifying the heat dissipation at low heat transfer coefficient (U), while it becomes inefficient when U is high. (C) 2019 Elsevier Ltd. All rights reserved.
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