A Simplified Analysis to Predict the Fire Hazard of Primary Lithium Battery

Author: Chen, M. Y., Liu, J. H., Ouyang, D. X., Cao, S. C., Wang, Z., Wang, J.

Journal: Applied Sciences-Basel

Keywords: lithium battery, heat release rate, t(2) fire, simulation, induced thermal runaway, ion battery, propagation, cells, behavior, safety, abuse

Abstract:

To better understand the fire risk of primary lithium batteries, the combustion properties of different numbers of primary lithium batteries were investigated experimentally in this work. Based on the t(2) fire principle and total heat release results from the experiments, a simplified analysis was developed to predict the fire hazard, and especially the heat release rate, of primary lithium batteries. By comparing the experiment and simulation results, the simulation line agrees well with the heat release rate curve based on the oxygen consumption measurements of a single primary lithium battery. When multiple batteries are burned, each battery ignites at different times throughout the process. The ignition time difference parameter is introduced into the simulation to achieve similar results as during multiple batteries combustion. These simulation curves conform well to the experimental curves, demonstrating that this heat release rate simulation analysis is suitable for application in batteries fires.