Study of energy release from pyrolysis gas combustion of li-ion battery in confined space

Abstract

Abstract: In order to quantify the influence of pyrolysis gas combustion of 18650 li-ion battery with 100% state of charge on the ambient temperature of confined space, a heat generation model of pyrolysis gas combustion of li-ion battery in confined space was established. The heat release rate of pyrolysis gas combustion was estimated based on the flame height, and the ambient temperature change caused by pyrolysis gas combustion in confined space was simulated by Fluent software. The results showed that the peak heat release rate of pyrolysis gas combustion is （312.26±23.41） W, the heat generated is （1 610.01±176.24） J，and the temperature rise in the confined space is 254.74 K. The simulation results are basically consistent with the experimental data, which verifies the reliability of the model.

Key words: li-ion battery, pyrolysis gas combustion, flame height, heat release rate, Fluent simulation

ZHANG Qing-song, ZHAI Qi-yue, ZHAO Zi-heng. Study of energy release from pyrolysis gas combustion of li-ion battery in confined space[J]. Fire Science and Technology, 2021, 40(12): 1711-1714.

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Study of energy release from pyrolysis gas combustion of li-ion battery in confined space

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