细水雾对磷酸铁锂储能电池模组性能影响研究

细水雾可有效扑灭储能电站磷酸铁锂电池热失控火灾并抑制其复燃，但在灭火过程中细水雾喷放对处于非热失控状态的正常电池的影响尚未明确，一定程度上限制了其在储能电池消防安全领域的推广应用。以正常326 Ah磷酸铁锂储能电池模组为试验对象，系统研究了细水雾持续喷放对其充放电性能、安全性能及数据监测模块（BMU）功能的影响。结果表明：在15 min的细水雾持续喷放及后续观察期间，3组电池模组均未出现外壳形变、未产生可燃气体、未出现温度升高及电火花等异常现象，且各单体电压平稳，BMU数据采集功能正常，试验前后电池模组充放电性能未出现明显波动，验证了细水雾在磷酸铁锂储能电池模组火灾扑救过程中的可靠性。

Research on the influence of water mist on the performance of lithium iron phosphate energy storage battery modules

Fine water mist can effectively extinguish the fire in the lithium iron phosphate battery for energy storage power stations and inhibit battery re-ignition. However, the impact of water mist spray on neighboring normal batteries in a non-thermal runaway state during the fire extinguishing process has not been clear, which partly limits its popularization and application in the field of fire safety in the energy storage battery. This paper takes a 326 Ah normal LFP battery module as the test object to systematically studies the effect of continuous spraying of water mist on its safety and electric performances and data monitoring module (BMU) function. The experimental results show that the battery modules do not have the phenomenon of bulging, gas production, temperature rising, burning, electric spark, voltage fluctuate wildly, etc, and the BMU data collection function is normal during the 15min of continuous spraying of water mist and the subsequent observation period. In addition, there are no significant fluctuations in the charge-discharge performance of the battery packs before and after the water spray test. The results of this study verify the reliability of the water mist in the fire extinguishing process of the lithium iron phosphate energy storage battery modules.