SYSTEM AND METHOD FOR CELL BALANCING AND CHARGING

摘要

An apparatus for charging a plurality of series-connected battery cells, includes first and second input terminals for providing a charging voltage to the series-connected battery cells. A transformer includes a first side associated with the charging voltage and a second side including a plurality of portions. Each of the portions is connected across at least two of the series-connected battery cells. A first switch in series between each of the portions of the second side and a first battery cell of at least two of the series-connected battery cells provides a charge current to the first battery cell during a part of a current cycle on the first side of the transformer. A second switch in series between each of the portions of the second side and a second battery cell of at least two of the series-connected battery cells provides a charge current to the second battery cell during a second portion of the cycle of the current on the first side of the transformer.