Experimental study on the effect of electrolyte flame retardant additives on the nail penetration safety of lithium-ion battery

Abstract

Abstract: The changes of battery voltage and temperature during nail penetration test are investigated by using the battery with NCM material and with NCM and LFP mixed material as the positive electrode. It is found that the vent temperature of NCM battery was 744.8 ℃, and the vent temperature of NCM and LFP mixed material battery was 380.3 ℃. The changes of voltage and temperature of battery with electrolyte flame retardant additives. during nail penetration test are studied after adding flame retardant additives, the vent temperature of NCM battery is 618.7 ℃, which dropped by 126.1 ℃ comparing with batteries without flame retardant additives; the vent temperature of NCM and LFP mixed material battery is 277.6 ℃, which dropped by 102.7 ℃ comparing with batteries without flame retardant additives, indicating that the flame retardant additive can significantly inhibit the thermal runaway of the battery and significantly improve the safety of battery during nail penetration.

Key words: lithium-ion battery, nail penetration, flame retardant additive, safety

Yu Jihang, Zhou Peijun, Jiang Yangsheng. Experimental study on the effect of electrolyte flame retardant additives on the nail penetration safety of lithium-ion battery[J]. Fire Science and Technology, 2022, 41(9): 1209-1212.

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Experimental study on the effect of electrolyte flame retardant additives on the nail penetration safety of lithium-ion battery

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