Abstract: In order to study the risk of thermal runaway of lithium battery in air transportation quantitatively and provide theoretical guidance for its mass transportation,thermal runaway experiments were carried out on lithium batteries under different states of charge and negative pressure to determine the gas release characteristics of lithium battery under different conditions. GC-MS was used to determine the gas composition in different SOC and negative pressure environment, and gas chromatograph was used to determine the content of each component of the gas released from the thermal runaway lithium ion battery under different conditions.The experimental results showed that different charge states have significant effect on the amount of gas released when the lithium battery initially exploded. When the state of charge is 10% or less,the amount of gas released from the lithium battery and the initial explosion temperature are higher. Different SOC has little influence on the composition of the gas, but have great influence on the content of the components. The amount of gas increases with the increase of negative pressure.

Key words: lithium-ion battery, state of charge, negative pressure environment, thermal runaway