Investigation on overcharge-caused thermal runaway of lithium-ion batteries in real-world electric vehicles

被引：105

作者：

Hong, Jichao ^{[1
,2
]}

Wang, Zhenpo ^{[3
]}

Qu, Changhui ^{[3
]}

Zhou, Yangjie ^{[3
]}

Shan, Tongxin ^{[3
]}

Zhang, Jinghan ^{[3
]}

Hou, Yankai ^{[3
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Shunde Grad Sch, Foshan 528000, Guangdong, Peoples R China

[3] Beijing Inst Technol, Natl Engn Lab Elect Vehicles, Beijing 100081, Peoples R China

来源：

APPLIED ENERGY | 2022年 / 321卷

基金：

中国国家自然科学基金;

关键词：

Lithium-ion batteries; Overcharge; Thermal runaway; Accident investigation; State of health; PHASE-CHANGE MATERIAL; FAILURE-MECHANISM; MANAGEMENT-SYSTEM; FAULT-DIAGNOSIS; MODEL; SAFETY; ABUSE; PACK; BEHAVIOR; CELL;

D O I：

10.1016/j.apenergy.2022.119229

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Overcharge is one of the most typical triggers leading to battery thermal runaway during real-world vehicular operation. An in-depth exploration of the real-scenario-oriented failure mechanism of battery overcharge is critical to safeguard the safe and durable operation of electric vehicles. With environmental changes and drivers' random behaviors under real occasions considered, this paper demonstrates the multi-factor overcharge-to-thermal-runaway modelling theory based on electro-chemical thermal coupling analysis. A case study of a real-world electric vehicle that experienced an overcharge-caused thermal runaway accident is presented, and the pre-accident battery overcharge characteristics are dissected referring to the accident investigation reports. Furthermore, the multi-stage pre-accident characterization is performed by dividing overcharge into three feature stages, such as charge, fully-charged instant, and overcharge. Various characterization parameters directly measurable and indirectly calculated are extracted, then a variable evaluation of the state of health degradation under overcharge is implemented. Moreover, a rudimentary probability model of overcharge-caused thermal runaway is proposed combining all potential motivating factors, including environments and drivers' behaviors. This is the first of this kind to apply the actual accident case on overcharge-caused thermal runaway research, which can guide the battery overcharge protection to safeguard drivers and passengers.

引用

页数：13

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