Electrochemical-Electromagnetic Coupled Physics-Based Mathematical Modeling of Li-Ion Batteries: A Theoretical Proof of Concept

Abstract

This theoretical study presents a novel proof-of-concept modeling approach that couples a P2D physics-based electrochemical model with a 3D electromagnetic model to analyze the behavior of lithium-ion batteries under AC perturbations in the 0.1 Hz–100 kHz frequency range that generates an impedance response in a cylindrical Li-ion battery cell. The coupling between the two models was done by connecting them in series and adding the separate impedances from both models. By considering effective material properties for the electromagnetics model, and by using the Nyquist and Bode plots as figures of merit, it was shown that such a hybrid coupling can be used to predict the impedance of such a system. This research lays the groundwork for future experimental validation and optimization of battery designs in applications involving AC perturbations, offering insights for enhanced energy storage and conversion systems.