2026/07/29 by Alexander Graf, Johannes Macher, Matthias Pferschy +4
Engineering · #Advanced Battery Technologies Research #Cellular and Composite Structures #Elasticity and Material Modeling
paper · pdf · doi:10.1016/j.jpowsour.2026.241031
openalex publication_date 2026/07/29 · openalex created_date 2026/07/30 · openalex updated_date 2026/08/01
In this work, a novel Thin Layer Compression testing rig by the company ZwickRoell was used to characterize the compression behavior of individual sheets of electrode foils from a commercial Li-ion battery cell. These electrode foils consist of a metallic current collector layer sandwiched between two active material coating layers. A custom mathematical correction method was developed, facilitated by the Thin Layer Compression testing rig, to separate the obtained data into the responses of the individual foil layers. This method enabled extraction of the stress–strain response of only the active material coating without the necessity of changing the structure of the electrode foils for the measurements. Finite element models replicating the sandwich structure of the electrode foils were created for the commercial solvers LS-DYNA and ABAQUS, where separate material models were implemented for current collector layers and active material coating layers based on the compression experiments and data from the literature. The force–deformation results of the simulations in LS-DYNA and ABAQUS show good agreement with the experimentally obtained data, despite the significant differences of how material models and elements are implemented in the two finite element method solvers.