Assessment of thermal runaway in commercial lithium iron phosphate cells due to overheating in an oven test

摘要

Overheating by oven exposure testing is a fundamental method to determine the severity of thermal runaway(TR)in lithium-ion cells.The TR behavior of lithium iron phosphate(LFP)cells under convection oven exposure is quantified and a comparison is made of their stability and severity against that of lithium metal oxide cells under similar conditions presented in the literature.The convection oven test is carried out at 180°C and 220°C,the TR response of the LFP cells is shown to be significantly more stable and less severe than lithium cobalt oxide cells tested in the literature.Also,under an oven abuse test a cylindrical cell is shown to have near uniform surface temperature along its length.