Parameter extraction of polymer electrolyte membrane fuel cell based on quasi-dynamic model and periphery signals

A dynamic experiment is carried out to verify the model. Relative errors within [-5, 5]% between simulating and experimental results are observed, showing the effectiveness of the results. Properties of internal states with respect to time and frequency are simulated. A net water transport coefficient β∈[0.13, 0.21] is predicted. The normalized transfer functions of small disturbance signals from the cell current to internal states are low-frequency-pass functions. A cutoff frequency (0.0003-0.37 Hz) and a resonating frequency (3.55 Hz), which retain under different operation conditions, is found.