主动防护的锂离子电池内短路概率估算  

Internal-Short-Circuit Probability Evaluation of Lithium-Ion Battery Based on Active Protection

作　　者：陈明彪[1,2,3,4] 黎华玲 宋文吉 冯自平[1,2,3,4] CHEN Ming-biao;LI Hua-ling;SONG Wen-ji;FENG Zi-ping(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;CAS Key Laboratory of Renewable Energy,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China;Guangzhou Institute of Energy Testing,Guangzhou 511447,China)

机构地区：[1]中国科学院广州能源研究所,广州510640 [2]中国科学院可再生能源重点实验室,广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广州510640 [4]中国科学院大学,北京100049 [5]广州能源检测研究院,广州511447

出　　处：《新能源进展》2022年第5期440-446,共7页Advances in New and Renewable Energy

基　　金：广东省自然科学基金项目(2019A1515011484);广东省市场监督管理局科技项目(2022CZ07)。

摘　　要：锂离子电池内短路引起的热安全问题,是影响其进一步发展的关键问题。提出一种预测内短路发生概率的主动防护方法,通过建立内短路概率估算模型,利用蒙特卡罗法计算概率,并分析不同因素对内短路发生概率的影响。结果发现:(1)离子电导率对发生内短路概率有较大影响。循环次数为3500次且温度为10℃时,当离子电导率分别为参考值的1倍和2倍时,内短路发生概率分别为70.6%和30.8%。(2)必要锂枝晶体积越大,则发生内短路的概率越低。(3)通过概率估算结果可建立安全区间。相对安全区间和危险区间,其分界线类似弧线。研究结果可为主动规避内短路提供新思路。Thermal safety caused by the internal short circuit(ISC)of lithium-ion battery is the key problem affecting its further development.An active protection method for predicting ISC probability was proposed.By establishing an estimation model of ISC probability,the Monte Carlo method was used to calculate the probability,and the influence of different factors on the ISC probability was analyzed.It was found that:(1)The ion conductivity had a great influence on the ISC probability.When the cycle number was 3500,and the temperature was 10oC,the ISC probability was about 70.6%and 30.8%when the ion conductivity was one time and two times of the reference value,respectively.(2)The larger the volume of necessary lithium dendritic crystals,the lower the probability of an internal short circuit.(3)Safety zone can be established based on the evaluation of ISC probability.The boundary between the relatively safe zone and the hazard zone was similar to an arc.The research results provide a new idea for actively avoiding an internal short circuit.

关 键 词：锂离子电池 内短路 概率 主动防护 

分 类 号：TK02[动力工程及工程热物理] TM911[电气工程—电力电子与电力传动]