Dynamic Battery Aging Model: Representation of Reversible Capacity Losses Using First Order Model Approach

This article deals about battery capacity ageing model, taking into account battery capacity regeneration during battery rest. In fact the battery capacity losses are modeled as a sum of a reversible part recovered after sufficient rest time and an irreversible part, definitely lost due to battery aging. A 12Ah commercial lithium battery was aged at 45°C with sequences of 5 days under power cycling followed by 2 days of rest, over more than 100 days. The model was implemented using Matlab\Simulink. Simulation results are in agreement with the experimental test, including capacity regeneration and battery capacity losses.