Electrochemical low-frequency impedance spectroscopy algorithm for diagnostics of PEM fuel cell degradation. (6th January 2020)

• Record Type: Journal Article
• Authors: Halvorsen, Ivar J.; Pivac, Ivan; Bezmalinović, Dario; Barbir, Frano; Zenith, Federico
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 2(2020)
• Page Start: 1325
• Page End: 1334
• Publication Date: 2020-01-06
• Subjects: Fuel cell -- Diagnostics -- Prognostics -- Relay feedback -- Impedance; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.04.004
• Languages: English
• ISSNs: 0360-3199

Abstract

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.