Energy Storage Science and Technology ›› 2025, Vol. 14 ›› Issue (1): 140-151.doi: 10.19799/j.cnki.2095-4239.2024.0651

• Energy Storage System and Engineering • Previous Articles     Next Articles

Fire suppression experiment of lithium iron phosphate battery with composite water extinguishing agent

Ke LI1(), Shunbing ZHU1,2(), Zhige TAO1, He WANG1   

  1. 1.Nanjing University of Technology
    2.Jiangsu Provincial Key Laboratory of Intrinsic Safety and Control Technology for Hazardous Chemicals, Nanjing 211816, Jiangsu, China
  • Received:2024-07-15 Revised:2024-08-02 Online:2025-01-28 Published:2025-02-25
  • Contact: Shunbing ZHU E-mail:2901626385@qq.com;13913399658@139.com

Abstract:

In order to explore the suppression effect of composite water extinguishing agents on lithium-ion battery fires, fire extinguishing experiments were conducted using water-soluble salts and surfactants at varying concentrations of a single component. Based on the results, four complex solutions (CS) were synthesized. The study focused on the surface tension and pyrolysis characteristics of fire extinguishing agents to determine the mechanism behind fire suppression. Simultaneously, various experiments were conducted to investigate characteristics of fine water mist parameters in extinguishing lithium-ion battery fires, focusing on the impact of working pressure and atomization cone angle on the effect of fire suppression. The results showed that applying four compound extinguishing agents can effectively inhibit the thermal runaway propagation of lithium-ion batteries. The results of the comprehensive evaluation of various extinguishing parameters and the effectiveness of extinguishing agents indicated that the CS-4 extinguishing agent, which is formulated with 0.15% FC-4 (nonafluorobutanesulfonyl fluoride), 1% APG0810 (alkyl glucoside), 0.32% CH4N2O (urea), and 2% NaHCO3 (sodium bicarbonate), demonstrated an outstanding comprehensive extinguishing effect. High-pressure fine water mist had a stronger flame suppression ability, whereas the flame under low-pressure fine water mist appeared to be intensified after being initially suppressed. The fire suppression efficiency of the fire extinguishing agent showed a V-shaped trend with the increase of water mist atomization cone angle, and the best effect was achieved when the atomization cone angle was 60°. The comprehensive research on the characteristic parameters of composite water extinguishing agents and water mist extinguishing systems can provide references for developing fire control strategies and extinguishing agents for lithium-ion battery fires and the safety protection of lithium battery energy storage power stations.

Key words: lithium-ion battery, high efficiency extinguishing agent, fire fighting effectiveness, fire extinguishing mechanism, water mist

CLC Number: