Venting particle-induced arc of lithium-ion batteries during the thermal runaway

IF 15 1区工程技术 Q1 ENERGY & FUELS Etransportation Pub Date : 2024-07-18 DOI:10.1016/j.etran.2024.100350

Cheng Li, Hewu Wang, Yalun Li, Languang Lu

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Abstract

Thermal runaway of lithium-ion batteries will release a large amount of particles with elevated temperature and high velocity, probably resulting in arc failures. In this study, we adopted an 117Ah fully-charged prismatic battery with Li(Ni₀_.₈Co₀_.₁Mn_0.1)O₂ cathode to collect the vented particles in an inert atmosphere after thermal runaway. All settled particles were classified into six groups to investigate the influence of electrode spacing, particle size and load resistance on the critical breakdown voltage as well as arc characteristics. As a result, a novel breakdown arc failure called venting particle-induced arc was firstly revealed and verified in the battery system. These settled particles significantly decrease the critical breakdown voltage for arc failure. The critical breakdown voltage exhibits a positively quadratic correlation with electrode spacing within 1–8 mm, while it is negatively correlated with particle sizes. Furthermore, a critical voltage map for breakdown arc under various particle sizes and electrode spacing was proposed. The results provide guidance to electrical hazards prevention in the battery system.

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锂离子电池在热失控过程中的微粒诱发电弧排气装置

锂离子电池的热失控会释放出大量温度升高且速度较快的颗粒，很可能导致电弧故障。在本研究中，我们采用了一个 117Ah 充满电的棱柱形电池，其正极为 Li(Ni0.8Co0.1Mn0.1)O2 ，在惰性气氛中收集热失控后排出的颗粒。所有沉降颗粒被分为六组，以研究电极间距、颗粒大小和负载电阻对临界击穿电压和电弧特性的影响。结果，在电池系统中首次发现并验证了一种新型击穿电弧故障，即排气颗粒诱发电弧。这些沉降颗粒大大降低了电弧失效的临界击穿电压。临界击穿电压与 1-8 毫米内的电极间距呈正二次方相关，而与颗粒大小呈负相关。此外，还提出了不同颗粒大小和电极间距下击穿电弧的临界电压图。这些结果为预防电池系统中的电气危害提供了指导。

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来源期刊

Etransportation Engineering-Automotive Engineering

CiteScore

19.80

自引率

12.60%

发文量

审稿时长

39 days

期刊介绍： eTransportation is a scholarly journal that aims to advance knowledge in the field of electric transportation. It focuses on all modes of transportation that utilize electricity as their primary source of energy, including electric vehicles, trains, ships, and aircraft. The journal covers all stages of research, development, and testing of new technologies, systems, and devices related to electrical transportation. The journal welcomes the use of simulation and analysis tools at the system, transport, or device level. Its primary emphasis is on the study of the electrical and electronic aspects of transportation systems. However, it also considers research on mechanical parts or subsystems of vehicles if there is a clear interaction with electrical or electronic equipment. Please note that this journal excludes other aspects such as sociological, political, regulatory, or environmental factors from its scope.