主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (10): 1354-1357.

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磷酸铁锂电池热失控行为研究进展

龚子涵，周霄辉，孙均利，王淮斌   

  1. (中国人民警察大学 物证鉴定中心,河北 廊坊 065000)
  • 出版日期:2022-10-15 发布日期:2022-10-15
  • 通讯作者: 国家自然科学基金青年科学基金项目（52106284）；河北省自然科学基金项目（B2021507001）；中国人民警察大学国家基金培育课题（ZRJJPY202101）
  • 作者简介:作者简介：龚子涵（1998- ），男，山东临沂人，中国人民警察大学物证鉴定中心硕士研究生，主要从事锂离子电池安全及火灾调查研究，河北省廊坊市西昌路220号，065000。

A review on thermal runaway behavior ofLithium-ion phosphate battery

Gong Zihan, Zhou Xiaohui,Sun Junli, Wang Huaibin   

  1. (Institute of Forensic Science, China People's Police University, Hebei Langfang 065000, China)
  • Online:2022-10-15 Published:2022-10-15

摘要： 摘 要：磷酸铁锂(LiFePO4)电池具有安全性好、成本低、放电电压平稳、寿命长等优点，尤其适用于大型、高功率的锂离子电池体系。然而，近些年关于LiFePO4电池热失控事故的报道逐渐增多，LiFePO4电池的安全性成为人们关注的焦点。对LiFePO4电池热失控机理、材料热稳定性以及失控过程中的热行为研究进展进行了分析综述，期望能提高人们对LiFePO4电池安全性的认识，并对其安全性能的改善进行了展望。

关键词: 关键词：磷酸铁锂, 锂电池, 热失控, 机理, 热行为, 安全性

Abstract: Abstract: The influence of internal angle configuration on downward fire spread characteristics of polyurethane insulation material (FPU) is analyzed by small-scale experimental research, and the influence of different angle configurations on typical characteristic parameters of fire spread of FPU insulation material is studied and discussed, including flame shape, mass loss rate, near-field temperature and fire spread rate. The results show that, under the constraint condition of the side wall, the burning degree of the sample when the angle is 30° is obviously higher than that of 150°; For the confined space formed by the internal angle configuration, the burning degree of FPU sample under the small angle configuration is greater than that under the large angle configuration. Influenced by the limiting effect of the side wall, the mass loss rate and fire spreading rate of FPU both decrease at first and then increase with the increase of the included angle. Due to the stretching effect of stack effect, there are two temperature peaks, and the first temperature peak is higher than the second.

Key words: Key words: internal angle configuration, polyurethane insulation material, fire spread, stack effect