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Effects of Overdischarge Rate on Thermal Runaway of NCM811 Li-Ion Batteries

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  • Dong Wang

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Lili Zheng

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Xichao Li

    (Energy Storage Business Department, CRRC Qingdao Sifang Rolling Stock Research Institute Co. Ltd., Qingdao 266031, China)

  • Guangchao Du

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Zhichao Zhang

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Yan Feng

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Longzhou Jia

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

  • Zuoqiang Dai

    (College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 260071, China
    Engineering Technology Center of Power Integration and Energy Storage System, Qingdao University, Qingdao 260071, China
    National and Local Joint Engineering Technology Center for Intelligent Power Integration Technology for Electric Vehicles (Qingdao), Qingdao 260071, China)

Abstract

Overdischarge often occurs during the use of battery packs, owing to cell inconsistency in the pack. In this study, the overdischarge behavior of 2.9 Ah cylindrical NCM811 [Li(Ni 0.8 Co 0.1 Mn 0.1 )O 2 ] batteries in an adiabatic environment was investigated. A higher overdischarge rate resulted in a faster temperature increase in the batteries. Moreover, the following temperatures increased: T u , at which the voltage decreased to 0 V; T i , at which the current decreased to 0 A; and the maximum temperature during the battery overdischarge (T m ). The following times decreased: t u , when the voltage decreased from 3 to 0 V, and t i , when the current decreased to 0 A. The discharge capacity of the batteries was 3.06–3.14 Ah, and the maximum discharge depth of the batteries was 105.51–108.27%. Additionally, the characteristic overdischarge behavior of the batteries in a high-temperature environment (55 °C) was investigated. At high temperatures, the safety during overdischarging decreased, and the amount of energy released during the overdischarge phase and short-circuiting decreased significantly. Shallow overdischarging did not significantly affect the battery capacity recovery. None of the overdischarging cases caused fires, explosions, or thermal runaway in the batteries. The NCM811 batteries achieved good safety performance under overdischarge conditions: hence, they are valuable references for battery safety research.

Suggested Citation

  • Dong Wang & Lili Zheng & Xichao Li & Guangchao Du & Zhichao Zhang & Yan Feng & Longzhou Jia & Zuoqiang Dai, 2020. "Effects of Overdischarge Rate on Thermal Runaway of NCM811 Li-Ion Batteries," Energies, MDPI, vol. 13(15), pages 1-14, July.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:15:p:3885-:d:391828
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    References listed on IDEAS

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    1. Ximing Cheng & Tao Li & Xusong Ruan & Zhenpo Wang, 2019. "Thermal Runaway Characteristics of a Large Format Lithium-Ion Battery Module," Energies, MDPI, vol. 12(16), pages 1-18, August.
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    Cited by:

    1. Tao Yin & Longzhou Jia & Xichao Li & Lili Zheng & Zuoqiang Dai, 2022. "Effect of High-Rate Cycle Aging and Over-Discharge on NCM811 (LiNi0.8Co0.1Mn0.1O2) Batteries," Energies, MDPI, vol. 15(8), pages 1-15, April.
    2. Carla Menale & Stefano Constà & Vincenzo Sglavo & Livia Della Seta & Roberto Bubbico, 2022. "Experimental Investigation of Overdischarge Effects on Commercial Li-Ion Cells," Energies, MDPI, vol. 15(22), pages 1-16, November.

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