Method for controlling output working voltage range of air-cooled fuel cell system

The invention discloses a method for controlling an output working voltage range of an air-cooled fuel cell system, and relates to the technical field of fuel cell power generation. The fuel cell hybrid power system comprises an air-cooled proton exchange membrane fuel cell, a fuel cell controller, a circuit selection module, a DC/DC converter, a lithium battery, a bus and the like. The air-cooled proton exchange membrane fuel cell is sequentially connected with the fuel cell controller, the circuit selection module and the DC/DC converter, so that chemical energy of hydrogen-oxygen reaction of the fuel cell is converted into electric energy, and power is provided for an electric load. The circuit selection module is connected with the fuel cell controller, the lithium battery is connected with the bus in parallel, and the lithium battery and the bus are combined with the fuel cell to form a hybrid power system. According to the invention, the output voltage range of the fuel cell system can be reduced, the p