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 (7): 883-887.

• • 上一篇    下一篇

C2HF5对锂离子电池热失控火焰贫燃侧的作用

赵宸豫1，黄 傲1，付小千1，郭子东2   

  1. （1.中国人民警察大学 研究生院，河北 廊坊 065000；2.中国人民警察大学 防火工程学院，河北 廊坊 065000）
  • 出版日期:2022-07-15 发布日期:2022-07-15
  • 作者简介:作者简介：赵宸豫（1996-），男，河南许昌人，中国人民警察大学硕士研究生，主要从事消防工程研究，河北省廊坊市西昌路220号，065000。
  • 基金资助:
    国家自然科学基金资助项目（51804314，51774296）；河北省自然科学基金资助项目（E2019507007）

Effect of C2HF5 on the lean-burn side of thermal runaway gas flame of lithium-ion battery

ZHAO Chen-yu1, HUANG Ao1, FU Xiao-qian1, GUO Zi-dong2   

  1. （1. Graduate School, China People's Police University, Hebei Langfang 065000, China; 2. School of Fire Protection Engineering, China People's Police University, Hebei Langfang 065000, China）
  • Online:2022-07-15 Published:2022-07-15

摘要： C2HF5作为一种优良的哈龙替代物对熄灭锂离子电池热失控火灾具有良好的效能。基于先前研究获取的锂离子电池热失控气体组分，采用CHEMKIN-Pro针对C2HF5与混气在贫燃侧促进燃烧的现象，从自由基浓度、敏感性两方面进行了模拟研究。结果表明，在贫燃侧，自由基H、O、OH的浓度在Xa=0.04时达到峰值，C2HF5表现为促进作用；在富燃侧，自由基浓度随C2HF5添加量增大而减小，C2HF5表现为抑制作用；在敏感性分析中，基元反应R1：H+O2=O+OH最为敏感，在贫燃侧，低C2HF5添加量下基元反应以促进作用为主，随着C2HF5添加量的增大，其抑制作用不断加强；在富燃侧，C2HF5对火焰表现为抑制作用。C2HF5与火焰的相互作用受到自身燃烧促燃热效应和化学抑制效应二者间竞争关系的控制。

关键词: 关键词：C2HF5, 锂离子电池热失控气体, CHEMKIN-Pro, 贫燃侧, 自由基浓度, 敏感性分析

Abstract: Abstract: As an excellent halon substitute, C2HF5 has a good effect on extinguishing thermal runaway fires of lithium-ion batteries. The gas composition of the thermal runaway gas of the lithium-ion battery was obtained in previous studies.Using CHEMKIN-Pro, the promotion of C2HF5 and mixed gas on the lean burn side was studied from two aspects of radical concentration and sensitivity analysis by simulation. The results show that the concentration of radicals H, O, and OH on the fuel lean side reach the peak at Xa=0.04, with C2HF5 showing a promotion effect; on the fuelrich side, the concentration of radicals decreases with the increase of C2HF5, showing an inhibitory effect;in the sensitivity analysis, the elementary reaction R1: H+O2=O+OH is the most sensitive. On the fuel lean side, under low C2HF5 addition, the elementary reaction is dominated by promotion. As the addition of C2HF5 increases, the inhibitory effect continues to strengthen; on the fuelrich side, the addition of C2HF5 appears as an inhibitory effect. The process of interaction between C2HF5 and flame is controlled by the competitive relationship between self-combustion promotion heat effect and chemical suppression effect.

Key words: Key words: C2HF5, thermal runaway gas for lithium-ion battery, CHEMKIN-Pro, fuel lean side, radical concentration, sensitivity analysis