Research on thermal runaway of lithium-ion batteries for electric bicycles in semi enclosed spaces
This article presents a saddle bracket model covered with flame-retardant protective curtains,based on the ISO 9705 test platform,a thermal runaway device for electric bicycles was constructed.The thermal runaway characteristics of 20 Ah/48 V LFP battery and 35 Ah/60 V NCM battery for electric bicycles were studied in a semi enclosed space of 197.0 L.The results showed that under experimental conditions,the peak heat release rate of LFP batteries battery was 151.40 kW,and the highest flame temperature measured at 30 cm outside the pressure relief port was 597.5℃;The peak heat release rate of NCM battery can reach 0.86 MW,and the highest flame temperature measured at 30 cm outside the pressure relief port is 630.3℃.
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