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| Thermal Runaway and Combustion Characteristics of NCM Ternary Lithium-ion Batteries under Different Induced Conditions |
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| DOI：10.7643/issn.1672-9242.2022.07.011 |
| KeyWord:ternary lithium-ion battery thermal runaway SOC acupuncture |
| Author | Institution |
| NIU Hui-chang |
New Energy Thermo-safety Research Center, Guangzhou Institute of Industry Technology, Guangdong Guangzhou, , China |
| WU Jing-yi |
School of Mechanical and Automotive Engineering, South China University of Technology, Guangdong Guangzhou , China |
| LI Zhao |
New Energy Thermo-safety Research Center, Guangzhou Institute of Industry Technology, Guangdong Guangzhou, , China |
| LI Lei |
New Energy Thermo-safety Research Center, Guangzhou Institute of Industry Technology, Guangdong Guangzhou, , China |
| JIANG Sai-hua |
School of Mechanical and Automotive Engineering, South China University of Technology, Guangdong Guangzhou , China |
| JI Dan |
New Energy Thermo-safety Research Center, Guangzhou Institute of Industry Technology, Guangdong Guangzhou, , China |
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| Abstract: |
| The research on the thermal runaway and combustion characteristics of ternary lithium-ion batteries under different induced conditions are helpful to understand the safety of energy storage batteries in the field of marine engineering and equipment, and provide a theoretical basis for the fire safety design of marine engineering. Mechanical abuse and thermal abuse scenarios of ternary lithium-ion batteries were simulated by acupuncture and heating respectively. The temperature, voltage and mass loss during thermal runaway of lithium-ion batteries with different state of charge (0%, 25%, 50%, 75% and 100%SOC) were measured. The batteries after thermal runaway were disassembled and the macroscopic and microscopic variation characteristics of the electrode residues were discussed. It is found that with the increase of battery SOC, the thermal runaway reactivity increases, and the battery surface temperature, temperature rising rate and mass loss rate also increase. The thermal runaway reaction of the two electrode coils triggered by acupuncture and heating are different, and the pair of electrode coils are shaped as "shell" and "crescent" respectively. The thermogravimetric analysis of the pole piece residues showed that the mass loss of battery of 50%SOC and 100%SOC were 36.73%, 18.75%, and 38.28%, 30.38%, respectively. Thermal runaway behavior of ternary lithium-ion batteries varies with battery SOC and induced conditions, and the thermal runaway reaction of batteries is more severe at high SOC. Under certain conditions, acupuncture triggers thermal runaway than heating more easily, but the reaction rate of batteries triggered by heating is faster. Informations on electrodes and thermogravimetric analysis of residues after thermal runaway can provide evidence for fire cause investigation. |
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