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The Impact of Wide Discharge C-Rates on the Voltage Plateau Performance of Cylindrical Ternary Lithium-Ion Batteries

Author

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  • Xingxing Wang

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China
    School of Rail Transportation, Soochow University, Suzhou 215131, China)

  • Yuhang Chen

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Linfei Chen

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Shengren Liu

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Yu Zhu

    (School of Mechanical Engineering, Nantong University, Nantong 226019, China)

  • Yelin Deng

    (School of Rail Transportation, Soochow University, Suzhou 215131, China)

Abstract

Battery voltage plateau characteristics are crucial for designing and controlling battery management systems. Utilising the plateau period attributes to their fullest extent can enable optimal battery control, enhance battery performance, and prolong battery lifespan. This research aimed to investigate the performance of cylindrical ternary lithium batteries at various discharge rates, focusing on the variations in terminal voltage, capacity, and temperature. The battery performance at different discharge rates was meticulously examined through cyclic charge/discharge experiments. The convexity of the voltage curve was used to analyse the voltage plateau characteristics at different rates. The findings revealed significant differences in battery performance under varying discharge rates. Higher discharge rates resulted in shorter discharge times and lower battery voltages at corresponding residual capacities. The discharge time, capacity, and voltage during the plateau phase decreased as the discharge rate increased. At discharge rates of 1 C, 3 C, 5 C, 7 C, 9 C, and 11 C, the proportion of discharged battery capacity ranged from 86.45% to 78.42%. At the same time, voltage and temperature variations during the plateau period decreased significantly compared to those before and after discharge. This research provides a crucial reference point for advancing battery design and thermal management systems.

Suggested Citation

  • Xingxing Wang & Yuhang Chen & Linfei Chen & Shengren Liu & Yu Zhu & Yelin Deng, 2024. "The Impact of Wide Discharge C-Rates on the Voltage Plateau Performance of Cylindrical Ternary Lithium-Ion Batteries," Energies, MDPI, vol. 17(14), pages 1-17, July.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:14:p:3488-:d:1436122
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    References listed on IDEAS

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    1. Wu, Tingting & Wang, Changhong & Hu, Yanxin & Liang, Zhixuan & Fan, Changxiang, 2023. "Research on electrochemical characteristics and heat generating properties of power battery based on multi-time scales," Energy, Elsevier, vol. 265(C).
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