Exploratory Analysis of Operational Thermal Behavior in Electric Bus Batteries: A Diagnostic Perspective

• Miguel A. Gaybor UNICAMP http://orcid.org/0009-0009-9325-4264
• Hernan R. Ullon UNICAMP https://orcid.org/0000-0002-7372-1373
• Madon C. de Almeida UNICAMP https://orcid.org/0000-0001-6538-8569

DOI: https://doi.org/10.5753/ssv.2024.32619

Resumo

This paper presents an analysis of the thermal behavior of electric bus batteries, emphasizing diagnostic techniques to identify potential issues in the Battery Thermal Management System (BTMS). Using real-time data from a CAN interface reader, the study focuses on temperature fluctuations and patterns that pose risks to the BTMS. Key findings include instances where maximum cell temperatures exceed safe operational limits, indicating a decline in BTMS effectiveness over time. The research also highlights the importance of monitoring the temperature difference (ΔT) between cells to ensure thermal distribution efficiency. Given the often limited data provided by electric vehicle manufacturers, this methodology demonstrates that early signs of thermal anomalies can be detected, offering valuable insights for improving maintenance strategies and ensuring the safety and longevity of electric bus batteries, particularly in climates where thermal management is crucial.

Palavras-chave: Battery Thermal Management System (BTMS), Safety, Battery Electric Bus (BEB), Thermal Diagnostics, Real Time Monitoring

Referências

W. Zichen and D. Changqing, “A comprehensive review on thermal management systems for power lithium-ion batteries,” Renewable and Sustainable Energy Reviews, vol. 139, p. 110685, 2021.

W. Gao, X. Li, M. Ma, Y. Fu, J. Jiang, and C. Mi, “Case study of an electric vehicle battery thermal runaway and online internal short-circuit detection,” IEEE Transactions on Power Electronics, vol. 36, no. 3, pp. 2452–2455, 2021.

P. A. Christensen, P. A. Anderson, G. D. Harper, S. M. Lambert, W. Mrozik, M. A. Rajaeifar, M. S. Wise, and O. Heidrich, “Risk management over the life cycle of lithium-ion batteries in electric vehicles,” Renewable and Sustainable Energy Reviews, vol. 148, p. 111240, 2021.

F. S. Hwang, T. Confrey, C. Reidy, D. Picovici, D. Callaghan, D. Culliton, and C. Nolan, “Review of battery thermal management systems in electric vehicles,” Renewable and Sustainable Energy Reviews, vol. 192, p. 114171, 2024.

C. Zhu, F. Lu, H. Zhang, J. Sun, and C. C. Mi, “A real-time battery thermal management strategy for connected and automated hybrid electric vehicles (cahevs) based on iterative dynamic programming,” IEEE Transactions on Vehicular Technology, vol. 67, no. 9, pp. 8077–8084, 2018.

L. Zhou, A. Garg, W. Li, and L. Gao, “Intelligent temperature control framework of lithium-ion battery for electric vehicles,” Applied Thermal Engineering, vol. 236, p. 121577, 2024.

M. Al-Zareer, I. Dincer, and M. A. Rosen, “A thermal performance management system for lithium-ion battery packs,” Applied Thermal Engineering, vol. 165, p. 114378, 2020.

Solcast. (2024) Global solar irradiance data and pv system poweroutput data. [Online]. Available: [link]