Aimed at the thermal runaway accident of lithium-ion batteries in the process of civil aviation transportation,through the simulation of a low-temperature and low-pressure environment during the civil aircraft flight,the thermal runaway of a lithium-ion battery is triggered by contact heating of an external heat source,and the thermal runaway characteristics of lithium-ion battery in a variable pressure and variable temperature environment are explored.Results show that the thermal runaway time of lithium-ion battery advances with an increase in the flight altitude.Within a certain temperature range,temperature has a greater impact on the thermal runaway time than air pressure.When the ambient temperature decreases to a certain extent,it will no longer affect the peak temperature of thermal runaway.The CO concentration increases with an increase in the flight altitude.The solid particles produced by thermal runaway are different at a limit of 0 ℃.When the flight altitude is 8 km(80 kPa,10 ℃),the combustion of thermal runaway products is stronger.
关键词
锂离子电池/热失控/燃烧产物/低温/低气压
Key words
Lithium-ion battery/thermal runaway/product of combustion/low temperature/low air pressure
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