Patent ID: 8907616

Claim:
A hybrid power supply system comprising a plurality of power modules electrically connected with each other in series; each of the plurality of power modules comprises a fuel cell unit and a lithium-ion battery unit; each fuel cell unit comprises at least two fuel cell monomers electrically connected with each other in series; and each lithium-ion battery unit comprises one or more lithium ion battery monomers electrically connected with each other in parallel; wherein each fuel cell unit is electrically connected with each lithium-ion battery unit in parallel and able to directly charge the lithium-ion battery unit; each of the plurality of power modules further comprises a battery management unit electrically connected with the fuel cell unit and the lithium-ion battery unit; each of the one or more lithium ion battery monomers has a cut-off charge voltage and a cut-off discharge voltage; and the battery management unit comprises: a detection circuit adapted to detect operating voltages, current, and temperature of the fuel cell unit and the lithium-ion battery unit; a control circuit adapted to compare the voltage of the lithium-ion battery unit with the cut-off charge voltage or the cut-off discharge voltage; an over-charge protective circuit adapted to prevent the lithium-ion battery unit from being overcharged by the fuel cell unit; and an over-discharge protective circuit adapted to prevent the lithium-ion battery unit and the fuel cell unit from being discharged exceeding the cut-off discharge voltage thereof.