The Development of Optimal Charging Protocols for Lithium-Ion Batteries to Reduce Lithium Plating

The study proposes two novel fast-charging strategies for lithium-ion batteries that prevent or minimize the occurrence of lithium plating. A new impedance tracking (IT) method that detects the onset of lithium plating is used to derive the charge profiles for both offline and online application at an ambient temperature of 20 degrees C for an NCA/graphite-based 18,650 type commercial cell. Charging performance and capacity fade trends for the proposed charging strategies are evaluated against the standard constant current/constant voltage (CC-CV) charging profile. Experimental results indicate that the proposed strategies can extend the battery life by more than 75% when compared to the CC-CV profile with only a marginal increase in associated charge time.

Automated summary

The study introduces two novel fast-charging strategies for lithium-ion batteries to prevent lithium plating, resulting in over 75% extension in battery life with only a marginal increase in charge time compared to the standard CC-CV charging profile.