Low-Cost Converter-Based Electrochemical Impedance Spectroscopy (EIS) for Fuel Cells Application

Le résumé fourni par la source

Diagnosing Fuel Cell (FC) systems remain challenging due to the electrochemical, thermal, and fluidic natural intersect of the Fuel Cell internal process. One widely recognized technique is the Electrochemical Impedance Spectroscopy (EIS), which can provide information on the internal process non-invasively, through the FC impedance. However, conventional EIS methods rely on costly equipment and are often not practical for real-time or high numerous FC stacks. Based on that, this paper proposes a low-cost converter-based EIS algorithm that enables online impedance measurement using only duty-cycle control. In addition to the detailed explanation of the algorithm, this work introduces a study on the impact of duty-cycle perturbation amplitude, by analyzing its effect on impedance accuracy, converter dynamics and quality of the perturbation signal. Moreover, simulation results showed that high values of duty cycle perturbation amplitude tend to lead to a more accurate impedance calculation. The algorithm is validated experimentally on a commercial Proton Exchange Membrane Fuel Cell (PEMFC) under multiple load conditions.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.