Test system and test method for obtaining polarization loss distribution of proton exchange membrane fuel cell

The invention belongs to the field of fuel cells, and particularly relates to a test system and a test method for acquiring polarization loss distribution of a proton exchange membrane fuel cell. Comprising the following steps: acquiring voltage, temperature, current density and high-frequency impedance at different positions of a fuel cell reaction area and humidity and pressure of cathode and anode sides through a multifunctional test board module; calculating reversible electromotive force and activation polarization loss at different positions of the fuel cell according to the obtained temperature, humidity, pressure and current density; obtaining ohmic polarization loss at different positions of the fuel cell according to the obtained current density and high-frequency impedance; and calculating mass transfer polarization loss at different positions of the fuel cell according to the obtained voltage, reversible electromotive force, activation polarization loss and ohmic polarization loss. Compared with t