Patent ID: 8896315
Filing Date: 2014-11-25
Classification: G01R,H01M,H02J,Y02E

Abstract:
1. A charge balancing method for use with a plurality of battery cells electrically connected together for balancing a charge state of a particular battery cell or a particular group of battery cells from said plurality of battery cells, said method comprising: providing a plurality of transformers, wherein each transformer in said plurality of transformers is comprised of a primary winding and a plurality of secondary windings, wherein one of said plurality of secondary windings for each said primary winding is connected in series and comprise a group of series connected secondary windings; operatively connecting each said group of series connected secondary windings to a distinct said particular battery cell or distinct said particular group of battery cells; simultaneously applying a plurality of waveforms to said plurality of transformers; and using said plurality of transformers to selectively vary said plurality of waveforms and apply a charge current to said particular battery cell or said particular group of battery cells for selectively balancing said charge state of said particular battery cell or said particular group of battery cells.