The impact of constant current-pulse strategy on fast charging of lithium-ion batteries

作者：Wenhao Huang, Furong Liu, Wenxuan Yin, Xiang Cheng, Changjun Xie · 年份：2025 · DOI：10.1109/iecon58223.2025.11220996 · 被引用次数：1 · 研究领域：Advanced Battery Technologies Research、Advanced DC-DC Converters、Advancements in Battery Materials

Traditional constant current-constant voltage (CC-CV) charging exhibits slow charging speeds at high states of charge (SOC), primarily due to the gradual decrease in charging current during the constant voltage (CV) phase as battery capacity increases. To reduce charging time during the high SOC period, this paper proposes a method for equivalent constant current and pulse charging by adjusting the average current rate and charging time while keeping the charging capacity unchanged in the constant voltage stage. Initially, traditional CC-CV charging was conducted on the lithium-ion batteries. Then, under the same initial constant current phase, constant current-constant current (CC-CC) and constant current-pulse current (CC-PC) charging simulations were performed, measuring the temperature rise and lithium plating conditions for each method. Finally, the charging behavior of pulse charging at different frequencies was compared. The results show that the CC-PC strategy achieves a significant balance between charging speed and lithium plating suppression: the total charging time is optimized to 3972 seconds, a 35% improvement over CC-CV. Additionally, compared to CC-CC, it reduces the risk of lithium plating and lowers the temperature rise. Furthermore, this method demonstrates good performance under both high and low frequencies.