Electrochemical low-frequency impedance spectroscopy algorithm for diagnostics of PEM fuel cell degradation |
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| Affiliation: | 1. ITE EFFICACITY, 14-20 Boulevard Newton, Champs-sur-Marne, F-77447 Marne la Vallée, France;2. Université Gustave Eiffel, IFSTTAR / COSYS, SATIE (UMR CNRS 8029), 25 Allée des marronniers, F-78000 Versailles Satory, France;3. FCLAB (FR CNRS 3539), Rue Ernest Thierry Mieg, F-90010 Belfort Cedex, France;4. Université Gustave Eiffel, Université de Lyon, IFSTTAR / AME / ECO7, 25 Avenue François Mitterrand, Case 24, F-69675 Bron Cedex, France;5. UTBM, Rue Ernest Thierry Mieg, F-90010 Belfort Cedex, France;6. ENGIE - CRIGEN, 361 Avenue du Président Wilson BP 33, F-93211 La Plaine Saint-Denis, France |
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| Abstract: | Prognostics and health management for fuel cells in real-world applications are important for optimization of lifetime and operation. A parameter that has been shown to indicate the state of ageing is the low-frequency intercept with the real axis of the Nyquist diagram in a fuel cell's impedance spectrum. This article presents a method for direct identification of this parameter, without the need to carry out a full electrochemical impedance spectroscopy, and with an algorithm that can be realized within a typical fuel-cell control system. The proposed method is based on relay excitation feedback, a proven solution from controller tuning. |
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| Keywords: | Fuel cell Diagnostics Prognostics Relay feedback Impedance |
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