首页|气凝胶灭火剂抑制锂离子储能电池热失控特性研究

气凝胶灭火剂抑制锂离子储能电池热失控特性研究

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通过对比试验探究了气凝胶灭火剂对锂离子储能电池热失控的抑制效果.研究满荷电状态下的 100 Ah磷酸铁锂储能电池热失控演变过程特征参数,识别出 3个灾害演变特征拐点作为灭火剂施加的指导节点.在相同节点分别施加灭火参数一致的气凝胶灭火剂与细水雾开展灭火对比测试.结果表明:触发明火前施加灭火剂均可有效阻断电池内部放热副反应,两者表现出相似的冷却效能;电池起火后,气凝胶灭火剂展现出更为出色的明火抑制效果,其接触电池表面形成的致密泡沫可有效阻隔氧气,实现快速灭火;对于已经触发热失控的情形,气凝胶灭火剂凭借预热覆盖效果,显著缩短电池射流火持续时间,可大幅降低电池火灾危害.
Inhibition of thermal runaway of energy storage battery by aerogel-based fire extinguishing agent
The suppression effect of aerogel-based fire extinguish-ing agent on thermal runaway of lithium-ion battery has been in-vestigated through comparative experiments.The thermal run-away characteristics of fully charged 100 Ah lithium iron phos-phate batteries have been studied,and three inflection points were identified as the guidance for the application of fire extinguishing agents.The fire mitigation effect of aerogel-based fire extinguish-ing agent and water mist was compared under same condition.Re-sults show that both agents exhibit similar cooling efficiency and thermal runaway can be effectively mitigated when released be-fore battery ignition.The aerogel-based fire extinguishing agent shows more excellent fire suppression effect.Once attach to the high temperature surface,the agent will form dense foam and can effectively block oxygen.In the case of thermal runaway,the aerogel-based fire extinguishing agent can significantly shorten the duration of jet fire,leading to the reduced fire hazard.

lithium-iron phosphate batterythermal runaway char-acteristicsaerogel-based fire extinguishing agentwater misten-ergy storage batteryjet fire

刘通、唐国才、王亮、朱国庆

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中国矿业大学 安全工程学院, 江苏 徐州 221116

中国科学技术大学 火灾科学国家重点实验室,安徽 合肥 230026

磷酸铁锂电池 热失控特征 气凝胶灭火剂 细水雾 储能电池 射流火

国家重点研发计划火灾科学国家重点实验室开放基金中央高校基本科研业务费专项"双一流"建设提升自主创新能力项目

2023YFC3009900HZ2023-KF022023QN10312022ZZCX05K05

2024

消防科学与技术
中国消防协会

消防科学与技术

CSTPCD北大核心
影响因子：0.846
ISSN：1009-0029
年,卷(期)：2024.43(1)
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