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28 August 2024 Study on the thermal runaway test method for power batteries of electric bicycles and fire characteristics
Song Guo, Lichang Fan, Guobin Gong, Longhui Wu, Zhengqi Wang, Kaibing Shao, Xiong Zhang
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Proceedings Volume 13251, Ninth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2024); 1325126 (2024) https://doi.org/10.1117/12.3040382
Event: 9th International Conference on Electromechanical Control Technology and Transportation (ICECTT 2024), 2024, Guilin, China
Abstract
In this study, a thermal runway test method for power batteries of electric bicycles was introduced, including the trigger mode for the thermal runway of batteries and the layout of sensors such as visual sensors, infrared sensors, and smoke sensors. Subsequently, relevant fire tests were carried out to validate the functional reliability of the battery management system (BMS). Additionally, the combustion characteristics, temperature characteristics, smoke, and debris status of electric bicycle fire triggered by the thermal runaway of power batteries were explored. Then, the typical phenomena (e.g., smoke emission, fire breakout, explosion, and deflagration) in the process of fire were analyzed through two lenses of time interval and temperature. It was found through tests that fire broke out 36 s after the thermal runway of the power battery of the electric bicycle, and explosion and deflagration took place 1 min and 23 s after the thermal runaway, which occurred 6 times during the whole process with an impact scope of 4.48 m. During the combustion, the maximum height of flame combustion was greater than 2.5 m, the maximum width of flame combustion was about 1.3 m, and the highest infrared temperature could reach 956.5℃. Analyzing the change laws of fire temperature of electric bicycles and the flame propagation characteristics based on test results will be of great reference significance to the fire safety design and protection of electric bicycles.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Song Guo, Lichang Fan, Guobin Gong, Longhui Wu, Zhengqi Wang, Kaibing Shao, and Xiong Zhang "Study on the thermal runaway test method for power batteries of electric bicycles and fire characteristics", Proc. SPIE 13251, Ninth International Conference on Electromechanical Control Technology and Transportation (ICECTT 2024), 1325126 (28 August 2024); https://doi.org/10.1117/12.3040382
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KEYWORDS
Batteries
Fire
Flame
Combustion
Infrared radiation
Safety
Temperature sensors
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