Multiscale modeling and calibration framework for predicting the mechanical response of Li-ion battery cell components

Artikel i vetenskaplig tidskrift, 2025

The mechanical response of battery cells plays a vital role in design of electric vehicles e.g., when evaluating their crashworthiness or studying the effects of cell swelling during operation. In this paper, we present a multiscale modeling framework for predicting the mechanical response of battery cell components at different length scales. Two design optimization loops for calibrating material model parameters are established. First, the effective mechanical response of the binder-conductive additive-electrolyte material phase inside the electrodes is estimated by performing homogenization of microscale Representative Volume Elements (RVEs), while utilizing experimental data for the effective electrode layer and data for the electrode particles from literature. Secondly, the effective response of the jellyroll is estimated by creating an RVE of the electrodes-separator stack and perform homogenization, while utilizing experimental data for the individual layers.