International Journal of Energy Research, Vol.45, No.2, 2303-2320, 2021
Toward safe and rapid battery charging: Design optimal fast charging strategies thorough aphysics-basedmodel considering lithium plating
The application of lithium-ion batteries is limited by long charging time and charging-related degradations. An enhanced fast-charging strategy can overcome these limitations. This work proposes a novel fast-charging strategy to charge lithium-ion batteries safely. This strategy contains a voltage-spectrum-based charging current profile that is optimized based on a physics-based battery model and a genetic algorithm. The battery model considers major degradation events during charging: lithium plating, plated lithium-induced reactions, SEI growth, as well as other degradations in the electrodes and the electrolyte. Proposed voltage-spectrum-based fast charging profiles are investigated with a different resolution of voltage intervals. The results show a charging profile with 15 voltage intervals and an adaptive resolution in the lower voltage range significantly can reduce charging time as well as mitigate battery degradation and avoid lithium plating. Promising results show that the charging time can be reduced without significantly lithium plating, and other side reactions compared to a constant charging strategy.