A Thermal Behaviour of Battery Cell Using Different Electrochemical Models (ECM and NTGK)

In this study, we examine the thermal behaviours of lithium-ion battery cells using two widely employed electro-chemistry models: the Equivalent Circuit Model (ECM) and the Newman-Tiedemann-Gauthier-Kim (NTGK) model. Given the critical importance of temperature regulation for the efficiency and lifespan of lithium-ion batteries, this research aims to identify the numerical method that best predicts cell thermal behaviour under constant discharge conditions with 2C, 1C and 0.5C rate. By comparing the outputs of the ECM and NTGK models, we assess their accuracy in predicting key parameters such as State-of-Charge (SoC), current output, voltage, temperature and heat generation. The findings offer valuable insights into the effectiveness of each model in simulating the thermal dynamics of battery cells, providing a basis for optimizing battery performance and longevity in real-world applications.