摘要
为探究盐溶液浸泡后锂离子电池的热失控行为,以18650型三元锂离子电池为研究对象,分析不同质量分数盐溶液浸泡后锂离子电池发生热失控时的热失控起始时间、表面温度及明火持续时间等特征参数。研究结果表明:盐溶液质量分数越大,浸泡过程中对锂电池腐蚀作用越强;浸泡后锂离子电池先后发生热失控时所对应的盐溶液种类依次为Na_(2)SO_(4),Na_(2)CO_(3),NaCl;NaCl、Na_(2)SO_(4)及Na_(2)CO_(3)这3种盐溶液浸泡后的锂离子电池热失控燃爆危险性最大所对应的溶液质量分数分别为5.0%,2.0%,5.0%;溶液质量分数越大,NaCl溶液浸泡后的电池热失控产生明火危害越大,Na_(2)CO_(3)溶液浸泡后的电池热失控产生明火危害越小。研究结果有助于辨识盐溶液浸泡后锂离子电池的受损程度和热失控风险,为锂离子电池的安全设计提供重要参考。
In order to explore the thermal runaway behavior of lithium-ion batteries after in salt solution immersion,this study examined 18650-type ternary lithium-ion batteries by analyzing key parameters including thermal runaway onset time,surface temperature,and open-flame duration after immersion in salt solutions with different mass fractions.The results demonstrate that higher salt mass fractions cause stronger corrosion to lithium batteries during immersion.Thermal runaway occurred sequentially in batteries immersed in Na_(2)SO_(4),Na_(2)CO_(3),and NaCl solutions.Maximum explosion and combustion hazards were observed at 5.0%mass fraction for NaCl,2.0%for Na_(2)SO_(4),and 5.0%for Na_(2)CO_(3)immersed batteries.Increasing mass fractions amplified open-flame hazards in NaCl immersed batteries while reducing them in Na_(2)CO_(3)immersed batteries.These findings facilitate the identification of damage levels and thermal runaway risks in salt-immersed lithium-ion batteries,offering critical references for safety-focused battery design.
作者
彭伟
朱思婷
张少杰
PENG Wei;ZHU Siting;ZHANG Shaojie(School of Public Safety and Emergency Management,Anhui University of Science&Technology,Hefei Anhui 231131,China;School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China)
出处
《中国安全生产科学技术》
北大核心
2025年第8期162-167,共6页
Journal of Safety Science and Technology
基金
安徽省高等学校科学研究项目(2024AH040063)
安徽理工大学2024年研究生创新基金项目(2024cx2168)。
关键词
锂离子电池
热失控
盐溶液浸泡
质量分数
安全
lithium-ion batteries
thermal runaway
salt solution immersion
mass fraction
safety
