This paper focuses on the safety of lithium-ion batteries during mechanical crush loading, as excessive loads can lead to internal short circuits and thermal runaway. The study uses discrete layered finite element models to analyze the internal stress and deformation of the battery cell, addressing challenges in material parameter measurements, meshing, and validation for future model improvements. The analysis demonstrates the advantages of using layer discrete models for qualitative and quantitative validation, and a sensitivity analysis of mechanical material parameters is conducted to examine their impact on the overall model.
An analysis of the current state and obstacles in discrete layered finite element simulation of crushing cylindrical lithium-ion cells / Spielbauer, M.; Peteler, F.; Németh, A.; Soellner, J.; Berg, P.; Bohlen, O.; Jossen, A. / Journal of Energy Storage 2023 (Open Access) - DOI