Experimental Thermal Hazard Investigation of Pressure and EC/PC/EMC Mass Ratio on Electrolyte

Changcheng Liu, Kaihui Zheng, Yong Zhou, Kai Zhu and Que Huang
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Changcheng Liu: School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China
Kaihui Zheng: School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China
Yong Zhou: State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
Kai Zhu: Business School, University of Shanghai for Science & Technology, Shanghai 200093, China
Que Huang: School of Environment and Safety Engineering, North University of China, Taiyuan 030051, China

Energies, 2021, vol. 14, issue 9, 1-19

Abstract: Electrolytes are involved in the thermal runaway (TR) process of cells, which is a potential hazard in lithium-ion batteries (LIBs). Therefore, the effects of different mass ratio of carbonate solvents (ethylene carbonate (EC)/propylene carbonate (PC)/ethyl methyl carbonate (EMC)) with LiBF 4 and different environmental pressure on the combustion characteristics of electrolyte such as flame centerline temperature, mass loss rate (MLR) and heat release rate (HRR) were analyzed. The combustion process could be divided into four stages: ignition, stable combustion stage, stable combustion with flame color change stage and extinguishing; with the decrease of pressure, the MLR of electrolyte declined and the combustion time prolonged, while the temperature of flame centerline increased.

Keywords: electrolyte; lithium-ion battery; mass ratio; environmental pressure; combustion characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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