A multiphysics understanding of internal short circuit mechanisms in lithium-ion batteries upon mechanical stress abuse

Lithium-ion batteries (LIBs) have played an increasingly dominant role in the current mobile society. Due to risky safety testing procedure, ultra-rigorous demands of facility, and complicated multiphysics nature issues, lack high-fidelity models describe behaviors lithium-ion upon abusive loading has significantly deferred further application LIBs. Herein, by assistance from ex-situ observation using X-ray Computed Tomography scanning technique postmortem characterization battery samples, we reveal formation process various internal short circuit (ISC) modes guiding our modeling. Strain-based ISC mode-dependent criteria are first developed establish mechanical-electrical coupling relationship. Particularly, a fully multiphysics-coupled model capable identifying describing entire evolution initial deformation final thermal runaway (TR) The demonstrates promising generalization SOC situations. Finally, is applied for 100% LIB mechanism deformation-different modes-TR. Results highlight power computational modeling understand underlying issues energy storage systems broader context.