US 11,811,029 B2
Charging method and battery pack
Chien-Wen Chen, Hsinchu County (TW)
Assigned to SIMPLO TECHNOLOGY CO., LTD., Hsinchu County (TW)
Filed by SIMPLO TECHNOLOGY CO., LTD., Hukou Township, Hsinchu County (TW)
Filed on Dec. 2, 2021, as Appl. No. 17/540,579.
Claims priority of application No. 110119103 (TW), filed on May 26, 2021.
Prior Publication US 2022/0384864 A1, Dec. 1, 2022
Int. Cl. H01M 10/48 (2006.01)
CPC H01M 10/48 (2013.01) 13 Claims
OG exemplary drawing
 
1. A charging method for charging multiple cells of a battery pack using a charging voltage, the method comprising steps of:
setting a value of the charging voltage to a rated charging voltage value, and setting a potential failure voltage difference ΔVPF;
using the rated charging voltage value to charge the cells of the battery pack, and detecting a voltage difference ΔVTDV between the cells;
obtaining a first charging voltage value smaller than the rated charging voltage value according to the voltage difference ΔVTDV between the cells, and decreasing the value of the charging voltage from the rated charging voltage value to the first charging voltage value for charging the cells;
obtaining a second charging voltage value smaller than the first charging voltage value according to the voltage difference ΔVTDV between the cells, and decreasing the value of the charging voltage from the first charging voltage value to the second charging voltage value for charging the cells; and
decreasing the charging voltage to a protection charging voltage value for the potential failure voltage difference ΔVPF when the voltage difference ΔVTDV between the cells satisfies the potential failure voltage difference ΔVPF,
wherein the voltage difference ΔVTDV between the cells is one of the voltage differences between arbitrary two of the cells.