In recent years,lithium-ion battery fire accidents have occurred frequently,and the consequences of fire accidents are also extremely serious.Developing high-efficiency fire extinguish-ing agents for lithium-ion batteries has become one of the re-search hotspots.In this paper,a kind of cellulose based flame-retardant hydrogel was synthesized by using polymer materials,crosslinking agent and flame retardant,and mixed with water in proportion to form a hydrogel fire extinguishing agent.The fire ex-tinguishing experiment shows that,compared with pure water mist,this kind of hydrogel extinguishing agent can reduce the sur-face temperature of the battery more quickly and put out the open fire.At high temperature,it can cover the battery surface,play a role of continuous cooling,and effectively reduce the height of the second temperature peak.Moreover,the addition of flame retar-dants can further increase the cooling rate,which has a good fire extinguishing effect on lithium iron phosphate batteries and can be used for emergency fire extinguishing of lithium-ion batteries.
维普
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