| Citation: | ZHANG Q S，LIU T T，ZHAO Z H. Quantitative method of influence of thermal runaway gas combustion on thermal runaway propagation of lithium-ion battery[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（1）：17-22 （in Chinese） doi: 10.13700/j.bh.1001-5965.2021.0212
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In order to quantify the effect of thermal runaway gas produced in the thermal runaway process of lithium-ionbattery on thermal runaway propagation, based on the energy conservation equation and the equivalent substitution method, this paper presents a method to calculate the contribution of thermal runaway gas combustion to thermal runaway propagation. The self-designed experimental platform of thermal runaway gas energy release calculation was used to pick the commercial 18650 battery and collect the parameters required for the calculation. According to the experiment results, the energy released during the combustion of the first cell’s thermal runaway gas accounts for 5.42% of the energy needed by the second cell’s thermal runaway, resulting in a 42% increase in the second cell’s self-heat production and a 29% reduction in thermal runaway time. The research results are helpful to further explore the energy transfer efficiency in the process of runaway heat transfer, and provide theoretical support for cell level and system level battery safety design.
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