A development of the detection unit of Fuel cell impedance

Researches to control water content of Polymer Electrolyte Membrane(PEM) are actively performed for increasing performance & durability of Fuel cell. This Research to control water content focused on measurement of PEM impedance. In this paper, The measurement system of PEM Impedance based on AC impedance method is proposed. Bi-directional DC/DC converter is designed to measurement of PEM impedance. The validity of proposed measurement system of PEM impedance is verified by experiment results in the Fuel cell Stack and FCEV..