大容量磷酸铁锂动力电池热失控预警策略研究*

doi:10.16265/j.cnki.issn 1003-3033.2021.11.017

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (11): 120-126.doi: 10.16265/j.cnki.issn 1003-3033.2021.11.017

大容量磷酸铁锂动力电池热失控预警策略研究^*

刘同宇¹, 李师^1,2 工程师, 付卫东² 工程师, 段强领¹ 副教授, 孙金华¹ 教授, 王青松^**1 研究员

1 中国科学技术大学火灾科学国家重点实验室,安徽合肥 230026;
2 郑州深澜动力科技有限公司,河南郑州 450000

收稿日期:2021-08-10 修回日期:2021-10-12 出版日期:2021-11-28 发布日期:2022-05-28
通讯作者: ** 王青松(1977—),男,河南商丘人,博士,研究员,博士生导师,主要从事锂离子电池安全研究。E-mail: pinew@ustc.edu.cn。
作者简介:刘同宇 (1995—),男,吉林通化人,硕士研究生,研究方向为锂离子电池热失控预警。E-mail:lty0277@mail.ustc.edu.cn。
基金资助:
国家自然科学基金资助(51674228,51976209)。

Study on early warning strategy of large LFP traction battery's thermal runaway

LIU Tongyu¹, LI Shi^1,2, FU Weidong², DUAN Qiangling¹, SUN Jinhua¹, WANG Qingsong¹

1 State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei Anhui 230026, China;
2 Zhengzhou Shenlan Power Technology Co., Ltd., Zhengzhou Henan 450000, China

Received:2021-08-10 Revised:2021-10-12 Online:2021-11-28 Published:2022-05-28

摘要/Abstract

摘要： 为探究磷酸铁锂动力电池热失控预警方法,在大型锂离子电池热失控试验集装箱内,研究商用大容量LFP电池(305 Ah)在外部加热和过充条件下的热失控特征;根据样品电池的热失控特征参数,设计开发耦合电池温度、特征气体、烟雾和挥发性有机化合物(VOC)传感器信号的三级预警策略,并试验验证该策略。结果表明:大容量LFP热失控过程存在一系列稳定的特征试验现象,多种特征参数可应用于电池热失控的早期预警;利用开发的分级预警策略,可实时监控LFP的安全状态,在目标电池发生热失控前,可以提前15 min预警,为热失控防控提供应急处置时间。

关键词: 磷酸铁锂(LFP)电池, 大容量, 动力电池, 热失控, 预警策略

Abstract: In order to explore thermal runaway warning method of LFP traction batteries, thermal runaway characteristics triggered by external heating and over charging of large LFP traction batteries for commercial use were experimentally studied in large test containers for lithium-ion batteries. Secondly, a three-stage early warning strategy composed of battery temperature, characteristic gas, smoke and volatile organic compounds (VOC) sensor signals was developed according to thermal runway parameters, and then was tested through a verification experiment. The results show that there are a series of stable phenomena in thermal runaway process of these LFP batteries, and several parameters can be employed for early warning. Using this graded warning strategy can monitor safety states of LFP batteries in real time, and an alert can be sent out 15 minutes in advance, providing more time for emergency prevention and control.

Key words: lithium iron phosphate (LFP), large capacity, traction battery, thermal runaway, early warning strategy

中图分类号:

X932

刘同宇, 李师, 付卫东, 段强领, 孙金华, 王青松. 大容量磷酸铁锂动力电池热失控预警策略研究^*[J]. 中国安全科学学报, 2021, 31(11): 120-126.

LIU Tongyu, LI Shi, FU Weidong, DUAN Qiangling, SUN Jinhua, WANG Qingsong. Study on early warning strategy of large LFP traction battery's thermal runaway[J]. China Safety Science Journal, 2021, 31(11): 120-126.

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大容量磷酸铁锂动力电池热失控预警策略研究^*

Study on early warning strategy of large LFP traction battery's thermal runaway

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