Patent ID: 7982429
Filing Date: 2011-07-19
Classification: H02J,Y02T

Abstract:
1. A charge equalization apparatus, comprising: N transformers connected in parallel to N respective series-connected batteries, and configured to each include one primary winding and two secondary windings and to charge batteries, other than the overcharged batteries, with energy discharged from the overcharged batteries; a first charge storage device and a second charge storage device each connected in parallel to the N series-connected battery and the N transformer; a first redistribution switch and a second redistribution switch connected in series between the first and second charge storage devices and the N transformers; charge control switches each connected to both ends of a primary winding of each of the N transformers; N first semiconductor switching elements each connected to a first secondary winding of each of the N transformers and a positive electrode of each of the N batteries; and N second semiconductor switching elements each connected to a second secondary winding of each of the N transformers and a positive electrode of each of the N batteries.