The German Research Foundation (DFG) is funding the Research Training Group "SiMET - Simulation of mechanical-electrical-thermal processes in lithium-ion batteries" (GRK 2218) at the Karlsruhe Institute of Technology (KIT) in collaboration with Offenburg University of Applied Sciences and the Helmholtz Institute Ulm. SiMET will now run until 2026 following the successful completion of the renewal review in 2021. In SiMET, doctoral students from various disciplines jointly research and develop cross-scale and multidisciplinary models and simulation methods for lithium-ion batteries. The models cover a broad spectrum of approaches and make it possible, for example, to simulate the operating behavior under various conditions, to show the effect of changes in the manufacturing process on the cell properties or to contribute to the understanding of damage effects and aging processes.