Lithium ion battery is widely used in energy storage field because of its advantages of high energy density,low self dis-charge rate,long cycle life and large output power.However,due to its intrinsic instability,more and more accidents occur fre-quently in energy storage.From the point of view of thermal run-away and fire propagation,this paper explores the mechanism of thermal runaway.Based on the characteristics of thermal runaway such as gas generation composition and content,expansion force,surface temperature and voltage-drop,the existing early warning(external)methods are summarized.On this basis,the develop-ment idea of early warning(external)of battery thermal runaway in the future is proposed,which provides ideas for early monitor-ing and early warning of thermal runaway of lithium battery.
维普
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