Patent ID: 8692515
Filing Date: 2014-04-08
Classification: H02J,Y02T

Abstract:
1. A series-connected rechargeable cell device, comprising: a plurality of rechargeable cells that are series-connected, and that are divided into a plurality of series-connected cell groups placed continuously in order of connecting; and a voltage-balance correcting circuit that balances the voltages of the cells, and that is provided with: the inter-group voltage-balance correcting circuit including: a plurality of transformer coils each having ends respectively connected to series-connection ends of each of the series-connected cell groups, that are magnetically coupled at the transformation ratio of 1:1, and a plurality of switching circuits, disposed between the transformer coils and the cell groups, respectively, that apply a current to each of the transformer coils simultaneously by being turned ON/OFF in phase in accordance with a periodic pulse signal.