Patent ID: 8022665
Filing Date: 2011-09-20
Classification: H02M

Abstract:
1. A bidirectional power converting device adapted to be coupled between first and second power storage units, said bidirectional power converting device comprising: a coupling circuit including first and second windings each having first and second ends, said first end of said first winding being adapted to be coupled to the first power storage unit, said first end of said second winding being coupled to said second end of said first winding; a first switch having a first end coupled to said second end of said first winding, and a grounded second end, said first switch being operable between an ON-state and an OFF-state; a second switch having a first end coupled to said second end of said first winding, and a second end, said second switch being operable between an ON-state and an OFF-state; a third switch having a first end coupled to said second end of said second switch, and a second end coupled to said second end of said second winding, said third switch being operable between an ON-state and an OFF-state; a fourth switch having a first end coupled to said second end of said third switch, and a second end adapted to be coupled to the second power storage unit, said fourth switch being operable between an ON-state and an OFF-state; and a first capacitor coupled between said second end of said second switch and ground; wherein said first, second, third and fourth switches are operable so that an input voltage supplied by one of the first and second power storage units is converted into an output voltage that is adapted to be supplied to the other one of the first and second power storage units.