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Two Modelling Approaches of Lithium-Ion Pouch Cells for Simulating the Mechanical Behaviour Fast and Detailed

For the simulation of the mechanical behaviour of pouch cells, there are varieties of modelling approaches, which differ greatly in the level of detail. In macroscopic models the single plies constituting the cell are not discretized separately, but are homogenized in thickness (pouch cell) or in radial direction (cylindrical cell), respectively. The main advantage of macroscopic models lies in their computational efficiency. However, these models fail in predicting short-circuit on a component-based level. Determination of the component behaviour is only possible to a very limited extent, which means that a component-based short-circuit criterion is also not an option.