This paper experimentally investigated the temperature characteristics,the mass loss,the change characteristics of heat production behaviors,the spatial efflux temperature and heat flow distribution characteristics for non-contact trigger power lithium-ion batteries of radiant heater during thermal failure.Batteries of 50 Ah Li(Ni0.6Co0.2Mn0.2)O2 were taken as the research object to carry out relevant tests based on a lithium-ion battery combustion experiment platform.The results show that 2 eruptions occurred during the battery thermal runaway experiment;The battery surface maximum temperature is 489.2 ℃ the highest average temperature rise rate is 27.7 K·s-1;the maximum mass loss rate is 32.7 g·s-1;the battery body total heat release is 1.05 MJ;the highest ambient temperature is 705.3 ℃the flue gas total heat release is 6.56 MJ·m-2,and the maximum ambient temperature of efflux space is higher than the maximum temperature of battery surface.These mean that the flammable gas with high temperature and high-speed aggravate the risk of thermal runaway.These results have significances for the early warning of battery failure,the thermal runaway suppression,and the fire risk control.
new energy vehicleslithium-ion batteriesthermal runawayheat radiationheat efflux characteristics
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