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Updated: May 10, 2025

In Situ Gas Analysis and Fire Characterization of Lithium-Ion Cells During Thermal Runaway Using an Environmental Chamber
Published on: March 31, 2023
Research on ignition criterion and combustion behavior of aluminum alloy for lithium battery
Xiuping Ding1, Xi Wang1, Chenhui Zhu1
1State Key Laboratory for Advanced Metals and Materials, University of Science and Technology, Beijing, 100083, China.
Abstract:
Thermal runaway represents a critical factor of catastrophic failure in power battery systems, posing significant safety risks in electric vehicle applications. Aluminum alloy casings serve as a primary protective barrier, and comprehensive investigation of their combustion characteristics is crucial for mitigating potential safety hazards in lithium-ion battery systems. The present study systematically examines the influence of dimensional variations and flame-retardant Ni-based surface modifications on the combustion mechanisms of 5052 aluminum alloy employed in lithium-ion battery configurations. Experimental findings reveal that the ignition temperature of the aluminum alloy decreased with oxygen pressure increased. The application of Ni-based flame-retardant coating markedly increasing the ignition threshold to 1007.8 ± 18.8 K. A robust predictive model characterizing the combustion threshold of the aluminum alloy and its flame-resistant coating was developed, demonstrating exceptional statistical validity with R2 values consistently exceeding 0.95. Microscopic morphological analysis of the combustion zones revealed that the incorporation of flame-retardant coating facilitates the formation of a more comprehensive oxide film and denser solidification zone microstructure.
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