A method and an apparatus (10) for equalizing the state of charge among a plurality of series-connected batteries (B1-BN). A module (12A-12N) is connected in parallel with each of the batteries (B1-BN), respectively. Each module (12A-12N) contains a voltage divider circuit (40) so that the voltage across...http://www.google.es/patents/US5504415?utm_source=gb-gplus-sharePatente US5504415 - Method and apparatus for automatic equalization of series-connected batteries
Method and apparatus for automatic equalization of series-connected batteries
