Patent ID: 7068011

Claim:
A series charger with separate detection of batteries, comprising: a plurality of sets of series-connected batteries forming individual charging loops, each set being a pair of series-connected batteries, the charging loops each being parallel-connected with a respective switch element, a one-way diode being interposed between the switch elements and a positive terminal of a respective battery set; a charging control device having an exchange power unit for converting input AC power into DC power for charging the plurality of series-connected batteries, the charging control device providing a reference voltage source to a control IC connected with a current detector, the control IC individually undergoing a −ΔV process to detect the terminal voltage of the series-connected battery sets within the respective charging loops, a respective switch element being turned on responsive to a corresponding one of the battery sets being fully charged to further charge another of the battery sets, the current detector undergoing a current adjustment for slightly charging the battery sets responsive to all of the battery sets being fully charged; and a power switch coupled between the current detector and the exchange power unit for terminating charging after completion of the slight charging of the battery sets.