Application ID: 60291
Large lithium-ion batteries are widely deployed in electric vehicles and for stationary energy storage applications. In the (stacked) pouch battery cell design, all current exits the cell on the cell “tabs”, and as the cell size and power increases, the voltage gradients in the highly conductive metal foil current collectors may come into play, resulting in a non-uniform current distribution and electrode utilization in the cell
A non-uniform utilization results in sub-optimal use of the battery electrodes and may also result in non-uniform and accelerated electrode aging.
This tutorial models the current distribution and electrode utilization in a large format lithium-ion battery pouch cell, and how it depends on the cell current. The model is in 3D.