Patent ID: 8552583

Claim:
A power supply system comprising: a power generator configured to generate electrical energy; a storage device configured to store the electrical energy; an inverter configured to convert a DC power into an AC power and transferring the AC power to a system; a unidirectional converter configured to transfer power input through one side of the unidirectional converter to the other side of the unidirectional converter with its voltage changed, the unidirectional converter being connected to the inverter through the other side of the unidirectional converter; a bidirectional interleaved converter configured to transfer the power input through one side of the bidirectional interleaved converter to the other side of the bidirectional interleaved converter through an interleaving method with its voltage changed or to transfer the power input through the other side of the bidirectional interleaved converter to the one side of the bidirectional interleaved converter through the interleaving method with its voltage changed, the bidirectional interleaved converter being connected to the other side of the unidirectional converter through the other side of the bidirectional interleaved converter; and a path forming device configured to form a power transfer path between the power generator, the one side of the unidirectional converter, the one side of the bidirectional interleaved converter, and the storage device, wherein the path forming device comprises: a first switch unit having a first terminal, a second terminal and a third terminal, and interconnecting the first terminal of the first switch unit to the second terminal of the first switch unit or the third terminal of the first switch unit, wherein the first terminal of the first switch unit is connected to the power generator, and the second terminal of the first switch unit is connected to the unidirectional converter, and a second switch unit having a first terminal, a second terminal and a third terminal, and interconnecting the second terminal of the second switch unit to the first terminal of the second switch unit or the third terminal of the second switch unit, wherein the first terminal of the second switch unit is connected to the storage device, the second terminal of the second switch unit is connected to the bidirectional interleaved converter, and the third terminal of the second switch unit is connected to the third terminal of the first switch unit.