Battery modeling: influence of current collector geometry on the behavior of large lithium-ion pouch cells

摘要

In this work, current density and temperature distribution across the electrodes of a large Li-ion pouch cell are examined by using an extended two-dimensional polarization model. Different design studies are carried out under variation of geometrical parameters such as the size of the cell tabs and the thickness of the current collectors. Simulations are showing, that the cell can be optimized with a small increase in depth-of-charge imbalance by altering the thickness of the current collectors. The simulation is validated by measurement data of a commercial 40 Ah Li-ion pouch cell with nickel-manganese-cobalt-oxide chemistry.