LITHIUM-ION BATTERY NON-CONSTANT-VOLTAGE CHARGING METHOD FOR CORRECTING AND COMPENSATING VOLTAGE

Lithium-ion battery non-constant-voltage charging method for correcting and compensating voltage, the battery stops charging when it is charged to limited charge voltage of the battery; the limited charge voltage of the battery positive and negative electrodes is set as 3U 0 -U S -U SO ; U SO is the standard stabilized voltage drop from U 0 which the battery is charged to by constant-current and constant-voltage charging; U S is the stabilized voltage drop from U 0 which the battery is charged to by constant-current charging; U 0 is standard charge cut-off voltage; U SO is selected by starting timing when the lithium-ion battery stops constant-current and constant-voltage charging and starts to be laid up, from some time point, the open-circuit voltage-drop of the lithium-ion battery would be smaller than some certain value during some certain time period, which means the battery voltage has already been in a stable state, then select the voltage corresponding to the first time point of the time period as standard stabilized voltage of the battery U SO ; the battery would be rapidly charged and charged close to saturation, and have better cycle life than the battery charged by constant-current and constant-voltage charging method of the same charging rate; or with the same cycle frequency, the battery charged with the charging method of the present invention would have larger discharge capacity.