Thermal Model of Lithium-Ion Batteries for Hybrid Electric Vehicles

Year 2025, Volume: 4 Issue: 2, 60 - 67, 30.06.2025

Racha Bayzou Adrien Soloy , Thomas Bartoli , Fatima Haıdar

Abstract

This study aims to develop a comprehensive model using MATLAB Simulink software to characterize the thermal behavior of lithium-ion battery packs. The model operates at both the cell and pack levels, enabling the determination of individual cell temperatures and the heat generated by Joule effect, influenced by chemical reactions during charge and discharge cycles. At the pack level, the model assesses temperature variations among cells by simulating heat transfers between them. Detailed principles, equations, and underlying hypotheses for constructing the model are elucidated. Through simulations, the model's performance is evaluated against experimental data. Remarkably, strong correlations are observed in temperature variations of 18650 LFP cylindrical cells within a battery pack, not only under standard charge and discharge conditions but also when subjected to a standardized WLTC (Worldwide harmonized Light vehicles Test Cycle) driving cycle. This indicates the robustness and accuracy of the chosen methodology in model development. The study's findings hold significant implications for optimizing battery pack design and advancing thermal management strategies in various applications such as electric vehicles and renewable energy systems. Future research endeavors may involve further refinement of the model and exploration of additional facets of battery behavior to enhance its predictive capabilities and applicability across diverse scenarios.

Keywords

Hybrid Electric Vehicles (HEV), Li-ion, MATLAB-Simulink, Thermal model

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