Experimental Study on the Suppression Effect of Different Explosion Suppressant on Thermal Runaway of Lithium-ion Batteries
In order to explore the suppression effect of different explosion suppressants on the thermal runaway of lithium-ion batteries,HFC-227ea and PERFLUORO were used as explosion suppressants to carry out the test of extinguishing and inhib-iting the 18650 ternary lithium-ion battery fires.The test results show that HFC-227ea and PERFLUORO can inhibit the lith-ium-ion battery fire blast,reduce the fire blast temperature,weaken the fire blast effect,and inhibit the thermal runaway propagation;that the capacity to inhibit the propagation of the thermal runaway of the lithium-ion battery module by PER-FLUORO is better than HFC-227ea,and when the mass volume concentration of the HFC-227ea explosion suppression a-gent is lower than 3.06 kg/m3,the thermal runaway propagation of the battery module cannot be inhibited;that PERFLUO-RO can inhibit the ambient temperature after the lithium-ion battery module fire blast happens,and reduce the temperature rate of the temperature rise,decrease the ambient temperature to-22.3℃/s,and play an inhibitory role to the pressure peak after the battery fire blast happens;and that the peak pressure difference between the first fire blast and the second fire blast of the battery module is 0.04 MPa at the best of scenario.
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