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Safely extinguishing Lithium battery fires

机译:安全扑灭锂电池起火

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摘要

Lithium batteries present a more frequent fire hazard each day as the number of consumer and industrial goods powered by Lithium batteries increases. Lithium-Ion is safe but with millions of consumers using batteries, failures are bound to happen. A small Li-Ion fire can be handled like any other combustible fire. However, as water flows away from the target it therefore requires continuous discharge until the fire is extinguished and cooled. When a Lithium-Ion cell goes into thermal runaway (increases in temperature) there are multiple possible sources of heat, for example: 1. Combustion - burning of electrolyte, packaging etc 2. Ohmic - resistive heating caused by high current flow through short circuits 3. Thermodynamic-ifthe electrodes are no longer isolated then the system will revert to its lowest energy state for that temperature as long as the activation energy is met 4. Chemical - reaction of the electrode material with other components of the battery (electrolyte), thermal decomposition of the metal oxide electrode, especially cobalt oxide.
机译:随着由锂电池供电的消费品和工业产品数量的增加,锂电池每天都存在着更频繁的火灾隐患。锂离子电池很安全,但随着数百万消费者使用电池,故障肯定会发生。小型锂离子火可以像其他可燃火一样处理。但是,当水从目标流走时,因此需要连续排放,直到火被扑灭和冷却。当锂离子电池进入热失控状态(温度升高)时,有多种可能的热源,例如:1.燃烧-电解质,包装等的燃烧2.欧姆-高电流通过短路引起的电阻加热3.热力学-如果不再隔离电极,则只要满足激活能,系统就会恢复到该温度下的最低能量状态。4.化学-电极材料与电池其他组件(电解质)的反应,金属氧化物电极,特别是氧化钴的热分解。

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    《Fire》 |2019年第1421期|43-43|共1页
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