PEMFC Fault Diagnosis, Modeling, and Mitigation

This paper introduces fault diagnosis and separation, mitigation, and modeling of a proton exchange membrane fuel cell (PEMFC). Experimental tests of a single PEMFC were performed during this study. Flooding and drying faults were implemented to be detected from the cell voltage and impedance response of the cell. The impedance response at low frequency was used to identify the cause of the fault. The slope of the magnitude and/or the negative phase response of the cell impedance at low frequency were observed to allow separation of a fault. A cell impedance model based on resistive capacitive (C model) and resistive constant-phase-element (CPE model) circuits is developed. The CPE model has a better approximation of the cell impedance. However, the C model is easy to implement since it is well known in most simulation tools (MATLAB/Simulink or PSpice). A power electronic control is designed and tested to mitigate the faults. Pulsing the cell current at low frequency was seen to increase the cell power by 8% during drying.

[1]  David A. Harrington,et al.  Characterisation of proton exchange membrane fuel cell (PEMFC) failures via electrochemical impedance spectroscopy , 2006 .

[2]  J. W. Van Zee,et al.  The Effect of Temperature and Pressure on the Performance of a PEMFC Exposed to Transient CO Concentrations , 2003 .

[3]  J. C. Amphlett,et al.  Carbon monoxide poisoning of proton-exchange membrane fuel cells , 1997, IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203).

[4]  P.N. Enjeti,et al.  An advanced power converter topology to significantly improve the CO tolerance of the PEM fuel cell power systems , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[5]  Trung Van Nguyen,et al.  Diagnostic Tool to Detect Electrode Flooding in Proton-Exchange-Membrane Fuel Cells , 2003 .

[6]  T. Pajkossy,et al.  Tafel current at fractal electrodes: Connection with admittance spectra , 1990 .

[7]  Belkacem Ould-Bouamama,et al.  Model based PEM fuel cell state-of-health monitoring via ac impedance measurements , 2006 .

[8]  Fernando H. Garzon,et al.  PEMFC reconfigured anodes for enhancing CO tolerance with air bleed. , 2004 .

[9]  Shimshon Gottesfeld,et al.  A New Approach to the Problem of Carbon Monoxide Poisoning in Fuel Cells Operating at Low Temperatures , 1988 .

[10]  Z. Qi,et al.  CO-tolerance of low-loaded Pt/Ru anodes for PEM fuel cells , 2003 .

[11]  Frano Barbir,et al.  Relationship between pressure drop and cell resistance as a diagnostic tool for PEM fuel cells , 2005 .

[12]  R. G. Colclaser,et al.  Transient modeling and simulation of a tubular solid oxide fuel cell , 1999 .