文章基本信息

标题：Modeling Li-ion Battery First Venting Events Before Thermal Runaway
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作者：Ting Cai ; Vivian Tran ; Anna G. Stefanopoulou 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2021
卷号：54
期号：20
页码：528-533
DOI：10.1016/j.ifacol.2021.11.226
语种：English
出版社：Elsevier
摘要：AbstractLi-ion battery failure and thermal runaway usually follow gas venting events, which can be categorized into the first venting and thermal runaway venting. Since first venting events occur prior to thermal runaway, identifying the first venting event is essential for early detection of a battery failure. This study presents a model for CO2gas generation at elevated temperature, which can be used to predict the occurrence of venting based on the buildup of cell internal pressure. The model considers the pressure of the generated gas and electrolyte vapor saturation pressure. To validate the model, an external short circuit (ESC) experiment is conducted for a nickel manganese cobalt (NMC) pouch cell that led to cell venting without thermal runaway. The model’s output can be used in conjunction with CO2sensors and electro-mechanical cell measurements to detect first venting events, and hopefully estimate the probability of an upcoming thermal runaway based on the amount of CO2released.
关键词：KeywordsLi-ion BatteryModelingSafetyGas Release