Evaluate the deflagration potential for commercial cylinder Li-ion cells under adiabatic confinement testing

Abstract

The pressure elevation related to the variances in temperature for cylinder Li-ion cells including LiCoO2, LiMnO2, LiFePO4, and LiNi1/3Mn1/3Co1/3O2 cathodes was compared with their explosive behaviors. 50 and 100% state of charges Li-ion cells were examined the pressure rising rates in an open-circuit voltage condition using adiabatic calorimetry. A charged cell underwent an extremely runaway reaction at elevated temperatures and caused a thermal explosion due to high potential energy of the battery system and interaction with the components. This study presented the relationships between temperature and pressure in a Li-ion cell proceeding on a thermal explosion in the adiabatic confinement testing. The layer-structure LiCoO2 cell has the significant deflagration potential for condensed phase explosion. Moreover, the considerable quantities of gas eruption from a charged cell can be resulted in battery rupture and flames from a confined energy storage system. The critical temperature to thermal explosion model for a cylinder Li-ion cell was evaluated to classify their runaway reaction and deflagration potential.