While Design Battery only generates cuboid battery geometries, for charging simulations, it is possible to use arbitrary battery geometries. They can be generated with the GeoDict structure generators or can stem from 3D scans.

Regarding the current collectors of non-cuboid geometries, it is necessary that they cover the whole surface of the structure in x-direction.

That is, the anode current collector needs to cover the whole structure in negative x-direction. The cathode current collector needs to cover the whole structure in positive x-direction.

For geometries with circular cross sections, current collectors can be positioned as shown in the figure below. The volume field visualization on the right shows the ion concentration in the solids for this geometry.

Additionally, the geometry needs to be chosen in such a way that no short-circuit of both current collectors exists. This means, the cathode and anode current collectors must not touch each other and must also not be connected directly via active material.