Thermal Equivalent Circuit Modelling and Experimental Validation of Pouch-type Lithium-ion Cell

Abstract

There is a growing demand for advanced energy storage systems. Lithium-ion batteries have become a high-demand energy technology due to their high energy density. However, temperature plays a crucial role in the performance, safety, and lifespan of lithium-ion batteries. Numerical models can be used to analyse thermal behaviour of Li-ion cells to improve effective thermal management system. In this study equivalent circuit model (ECM) model was used in numerical analysis. The ECM is comprised of two resistance-capacitance (RC) networks, one sires resistor, and one voltage source that are all function of state-of-charge (SOC) and temperature. Hybrid pulse power characterization (HPPC) test is applied to extract the ECM parameters. Numerical and experimental tests were performed at 298.15K environmental temperature and 0.25C, 0.5C and 1C constant discharge rates. The numerical model shows good agreement with experimental test data. The developed model can be employed for battery thermal management system (BTMS) design by saving calculation costs efficiently. © 2025 Elsevier B.V., All rights reserved.