Experimental Analysis of Voltage and Multi-Point Temperature Distribution in a 6S Lithium-Ion Battery Pack Under Constant Current Loading
DOI:
https://doi.org/10.26877/asset.v8i2.2751Keywords:
Lihium-ion 18650 battery, 6S3P configuration, Thermal performance, Voltage-current correlation, Battery Management System (BMS).Abstract
Lithium-ion batteries are widely utilized in energy storage applications; however, temperature non-uniformity remains a critical issue affecting performance, safety, and lifespan. This study presents an experimental investigation of the correlation between voltage and multi-point temperature distribution in a 6S lithium-ion battery pack under a constant ±5 A charge–discharge current. Temperature measurements were obtained from three sensor locations to capture spatial thermal variations during operation. The results reveal that the central cell consistently exhibited the highest temperature, reaching approximately 40 °C, while a maximum thermal gradient of 5.7 °C was observed across the pack. Furthermore, a positive correlation between current and temperature indicates uneven heat generation among cells. These findings provide direct experimental evidence of thermal asymmetry in multi-cell configurations and emphasize the importance of optimized sensor placement and enhanced thermal management strategies in Battery Management Systems (BMS).
References
[1] J. Li, Y. Yuan, P. Wang, L. Jia, H. Ju, and R. Chen, “A flexible phase change material based on hydrated salts exhibits high stability and insulation properties for battery thermal management,” Sustain. Energy Fuels, vol. 9, pp. 804–815, 2025.
[2] H. T. Alshamkhani, B. Basem, M. J. Jweeg, and others, “Revolutionizing battery thermal management: hybrid nanofluids and PCM in cylindrical pack cooling,” Mater. Renew. Sustain. Energy, vol. 14, p. 42, 2025.
[3] L. Wang et al., “Thermally conductive phase change electrodes for in situ thermal management of lithium-ion batteries,” J. Mater. Chem. A, vol. 13, pp. 12650–12660, 2025.
[4] Q. Cheng and H. Zhao, “Design and research of heat dissipation system of electric vehicle lithium-ion battery pack based on artificial intelligence optimization algorithm,” Energy Informatics, vol. 7, p. 50, 2024.
[5] W. Li, Y. Zhou, H. Zhang, and X. Tang, “A Review on Battery Thermal Management for New Energy Vehicles,” Energies, vol. 16, no. 13, p. 4845, 2023.
[6] J. Gu, H. K. Kim, and S. Jang, “Study of Cooling Performance of Liquid-Cooled EV Battery Module According to the TIM Compression Ratio,” Int. J. Automot. Technol., vol. 26, 2025.
[7] X. Yang and B. Huang, “Heat Transfer Performance Study on Several Composite Phase Change Materials for Battery Thermal Management,” Int. J. Thermophys., vol. 45, p. 65, 2024.
[8] K. Y. Gomez Diaz, S. E. De Leon Aldaco, J. Aguayo Alquicira, M. Ponce Silva, S. Portillo Contreras, and O. Sanchez Vargas, “Thermal Management Systems for Lithium-Ion Batteries for Electric Vehicles: A Review,” World Electr. Veh. J., vol. 16, no. 7, p. 346, 2025.
[9] A. Rohini, A. S. Abishek, and S. Jeeva, “Analysis on a Battery Thermal Management System of an Lithium-Ion Powered Battery with Heat Sink for an Electric Vehicle,” in Journal of Physics: Conference Series, IOP Publishing, 2024, p. 12017.
[10] T. F. Yang, “Study on thermal aspects of lithium-ion battery packs with phase change-material wrapping,” J. Name, 2024.
[11] X. Zhang et al., “A Comprehensive Analysis of Thermal Heat Dissipation for Lithium-Ion Battery Packs,” Energies, vol. 18, no. 9, p. 2234, 2025.
[12] A. P. Carlucci, H. Darvish, and D. Laforgia, “Detailed Thermal Characterization on a 48-V Lithium-Ion Battery Pack during Charge-Discharge Cycles,” arXiv Prepr. arXiv2310.03421, 2023.
[13] O. S. Mahdy et al., “Quantitative evaluation of thermal runaway in lithium-ion batteries under critical heating conditions to enhance safety,” Sci. Rep., vol. 15, p. 24004, 2025.
[14] S. Argade and A. De, “Optimization study of a Z-type airflow cooling system of a lithium-ion battery pack,” arXiv Prepr. arXiv2407.03062, 2024.
[15] G. N. Newton, “Sustainability of Battery Technologies: Today and Tomorrow,” ACS Sustain. Chem. Eng., 2021.
[16] K. Pushkar, “Thermal Analysis of Lithium Ion Battery Pack with Different Operating Conditions,” 2022.
[17] X. Zhang et al., “Comprehensive Analysis of Thermal Dissipation in Lithium-Ion Battery Packs,” arXiv Prepr. arXiv2502.07070, 2025.
[18] M. M. Hasan, “Advancing energy storage: The future trajectory of lithium-ion battery technology,” J. Name / Rev. Artic., 2025.
[19] M. W. Nazar, N. Iqbal, M. Ali, H. Nazir, and M. Z. B. Amjad, “Thermal Management of Li-ion battery by using active and passive cooling method,” J. Energy Storage, 2023.
[20] J. B. Kudiyirican and R. Kannan, “Exploring the Thermal Dynamics of a 48-V 30-Ah Lithium-ion Battery Pack Through Transient Thermal Analysis,” J. Therm. Sci., 2025.
[21] H. Zhang, “Cooling Optimization Strategy for a 6S4P Lithium-Ion Battery Pack,” Energies, vol. 16, no. 1, p. 460, 2022.
[22] M. Chen and others, “Thermal Safety of Lithium-Ion Batteries: Current Status and Research Progress,” Batteries, vol. 11, no. 3, 2025.
[23] A. S. Thomas, N. Ghosh, B. K. Panigrahi, and A. Garg, “Electrochemical and Thermal Analysis of Lithium-Ion Battery Pack With Different Cell Configurations,” Res. Prepr., 2022.
[24] M. Shahjalal and others, “A review of thermal management for Li-ion batteries: Operating range, heat generation, and uniformity,” Appl. Energy, vol. 289, 2021.
[25] M. K. Tran, A. Mevawalla, A. Aziz, S. Panchal, Y. Xie, and M. A. Fowler, “A Review of Lithium-Ion Battery Thermal Runaway Modeling and Diagnosis Approaches,” Processes, vol. 10, no. 6, p. 1192, 2022.
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