多收费
核工程
锂(药物)
电池(电)
材料科学
电压
离子
热的
法律工程学
电气工程
功率(物理)
热失控
化学
工程类
热力学
物理
内分泌学
医学
有机化学
作者
Lihua Jiang,Zhimin Luo,Tangqin Wu,Liyong Shao,Jinhua Sun,Caiqiu Liu,Guohui Li,Kenan Cao,Qingsong Wang
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2019-01-01
卷期号:166 (6): A1055-A1062
被引量:51
摘要
High-power lithium ion batteries have become the development focus of electric vehicles and large-scale energy storage devices. But it is also particularly critical to further study their hazardous properties under abuse conditions because higher capacity is more catastrophic. In this study, overcharge tests of 43 Ah cubic lithium ion batteries with different charge rates are conducted to study the thermal runaway behavior and parameter characteristics. Material characterization and thermal analysis tests further explain the overcharge mechanism. The emergence of voltage platform during overcharge is considered to be a significant characteristic for the high-power batteries which can be considered as an important criterion for suppressing thermal runaway. The reason for the appearance of the voltage platform is further discussed and the relevant thermal runaway critical parameters near the voltage platform under different overcharge rate are summarized. Thermal runaway risk assessment of overcharge and the critical parameter analysis of early warning are established to provide references for battery management system.
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