The Impact of Wide Discharge C-Rates on the Voltage Plateau Performance of Cylindrical Ternary Lithium-Ion Batteries
Author:
Wang Xingxing12ORCID, Chen Yuhang1, Chen Linfei1ORCID, Liu Shengren1, Zhu Yu1, Deng Yelin2
Affiliation:
1. School of Mechanical Engineering, Nantong University, Nantong 226019, China 2. 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.
Funder
National Natural Science Foundation of China Jiangsu Provincial Key Research and Development Program of China Natural Science Horizontal Research Project of Nantong University
Reference41 articles.
1. The role of governmental policy in game between traditional fuel and new energy vehicles;Liao;Comput. Ind. Eng.,2022 2. Wang, X., Liu, S., Zhang, Y., Lv, S., Ni, H., Deng, Y., and Yuan, Y. (2022). A review of the power battery thermal management system with different cooling, heating and coupling system. Energies, 15. 3. Zhou, P., Zhu, L., Fu, D., Du, J., Zhao, X., and Sun, B. (2024). Research on the Performance Improvement Method for Lithium-Ion Battery in High-Power Application Scenarios. Energies, 17. 4. Wang, X., Zhang, Y., Deng, Y., Yuan, Y., Zhang, F., Lv, S., Zhu, Y., and Ni, H. (2023). Effects of Different Charging Currents and Temperatures on the Voltage Plateau Behavior of Li-Ion Batteries. Batteries, 9. 5. Sang, B., Wu, Z., Yang, B., Wei, J., and Wan, Y. (2024). Joint Estimation of SOC and SOH for Lithium-Ion Batteries Based on Dual Adaptive Central Difference H-Infinity Filter. Energies, 17.
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