Patent ID: 8129938

Claim:
A multi power supply system ( 100 ) for a portable device ( 200 ), comprising a universal serial bus (USB) output port ( 110 ), a solar power unit ( 130 ) and an auxiliary electric power unit ( 150 ), wherein the universal serial bus (USB) output port ( 110 ) is a power output port for outputting power from the multi power supply system ( 100 ) to the portable device ( 200 ); the multi power supply system ( 100 ) characterized in that: the multi power supply system ( 100 ) further comprises a power transmission unit ( 140 ) and a rectifying circuit ( 120 ), wherein,the auxiliary electric power unit ( 150 ) is coupled to the power transmission unit the power transmission unit ( 140 ) is coupled to the rectifying circuit ( 120 ) for supplying an auxiliary electric power from the auxiliary electric power unit ( 150 ) to the rectifying circuit ( 120 ) and supplying a charging power from the rectifying circuit ( 120 ) to the auxiliary electric power unit ( 150 ); the solar power unit ( 130 ) is coupled to the rectifying circuit ( 120 ) to provide a solar/electric energy conversion for supplying a solar electric power to the rectifying circuit ( 120 ); the rectifying circuit ( 120 ) is directly coupled to the power transmission unit ( 140 ), the solar power unit ( 130 ) and the universal serial bus (USB) output port ( 110 ) for simultaneously providing four functions of (a) integrating the auxiliary electric power and the solar electric power; (b) stabilizing the power received from the auxiliary electric power and the solar electric power; (c) supplying an output current at a specific output voltage to the universal serial bus (USB) output port ( 110 ); and (d) charging the auxiliary electric power unit ( 150 ) via the power transmission unit ( 140 ) by the solar electric power.