Rapid impedance measuring device for proton exchange membrane fuel cell

The invention discloses a rapid impedance measuring device for a proton exchange membrane fuel cell. The system comprises a signal processing circuit, a data acquisition card, an upper computer and an excitation current generating device, the upper computer is connected with the data acquisition card and the excitation current generating device, the data acquisition card is connected with the signal processing circuit, the excitation current generating device is connected with a load of the fuel cell in parallel, and the signal processing circuit is connected with the proton exchange membrane fuel cell. The collector is used for collecting output voltage and current of the fuel cell; the upper computer controls the excitation current generating device to generate different types of excitation current, the excitation current of the excitation current generating device is superposed on the output current of the proton exchange membrane fuel cell, and the signal processing circuit collects the output voltage and