Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization

Benoit Bidoggia, Søren Knudsen Kær

Research output: Contribution to conference without publisher/journalPaper without publisher/journalResearch

Abstract

Fuel cells have started replacing traditional lead-acid battery banks in backup systems. Although these systems are characterized by long periods of standby, they must be able to start at any instant in the shortest time. In the case of low temperature proton exchange membrane fuel cell systems, a precise estimation of hydration status of the fuel cell during standby is important for a fast and safe startup. In this article, the measurement of the complex impedance of the fuel cell is suggested as a method to estimate the membrane hydration status. A 56-cell fuel cell stack has been symmetrically fed with air whose temperature and relative humidity were controlled, and its complex impedance was measured at different frequencies and for different values of relative humidity. After showing that the experiment was repeatable, the fuel cell stack was characterized, a power regression model was applied, and the relationship between module of impedance and relative humidity was found. The results showed that measuring the impedance of a fuel cell during standby can be a viable way for estimating the hydration status of its membrane.
Original languageEnglish
Publication date2012
Number of pages11
Publication statusPublished - 2012
Event7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012 - Monte-Carlo, Monaco
Duration: 22 Mar 201225 Mar 2012

Conference

Conference7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012
CountryMonaco
CityMonte-Carlo
Period22/03/201225/03/2012

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
Hydration
Fuel cells
Membranes
Atmospheric humidity
Lead acid batteries
Temperature
Air
Experiments

Keywords

  • Fuel cells
  • Distributed power generation
  • Uninterruptible power systems
  • Humidity measurement
  • Impedance

Cite this

Bidoggia, B., & Kær, S. K. (2012). Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization. Paper presented at 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012, Monte-Carlo, Monaco.
Bidoggia, Benoit ; Kær, Søren Knudsen. / Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization. Paper presented at 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012, Monte-Carlo, Monaco.11 p.
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Bidoggia, B & Kær, SK 2012, 'Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization', Paper presented at 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012, Monte-Carlo, Monaco, 22/03/2012 - 25/03/2012.

Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization. / Bidoggia, Benoit; Kær, Søren Knudsen.

2012. Paper presented at 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012, Monte-Carlo, Monaco.

Research output: Contribution to conference without publisher/journalPaper without publisher/journalResearch

TY - CONF

T1 - Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization

AU - Bidoggia, Benoit

AU - Kær, Søren Knudsen

PY - 2012

Y1 - 2012

N2 - Fuel cells have started replacing traditional lead-acid battery banks in backup systems. Although these systems are characterized by long periods of standby, they must be able to start at any instant in the shortest time. In the case of low temperature proton exchange membrane fuel cell systems, a precise estimation of hydration status of the fuel cell during standby is important for a fast and safe startup. In this article, the measurement of the complex impedance of the fuel cell is suggested as a method to estimate the membrane hydration status. A 56-cell fuel cell stack has been symmetrically fed with air whose temperature and relative humidity were controlled, and its complex impedance was measured at different frequencies and for different values of relative humidity. After showing that the experiment was repeatable, the fuel cell stack was characterized, a power regression model was applied, and the relationship between module of impedance and relative humidity was found. The results showed that measuring the impedance of a fuel cell during standby can be a viable way for estimating the hydration status of its membrane.

AB - Fuel cells have started replacing traditional lead-acid battery banks in backup systems. Although these systems are characterized by long periods of standby, they must be able to start at any instant in the shortest time. In the case of low temperature proton exchange membrane fuel cell systems, a precise estimation of hydration status of the fuel cell during standby is important for a fast and safe startup. In this article, the measurement of the complex impedance of the fuel cell is suggested as a method to estimate the membrane hydration status. A 56-cell fuel cell stack has been symmetrically fed with air whose temperature and relative humidity were controlled, and its complex impedance was measured at different frequencies and for different values of relative humidity. After showing that the experiment was repeatable, the fuel cell stack was characterized, a power regression model was applied, and the relationship between module of impedance and relative humidity was found. The results showed that measuring the impedance of a fuel cell during standby can be a viable way for estimating the hydration status of its membrane.

KW - Fuel cells

KW - Distributed power generation

KW - Uninterruptible power systems

KW - Humidity measurement

KW - Impedance

M3 - Paper without publisher/journal

ER -

Bidoggia B, Kær SK. Estimation of Membrane Hydration Status for Standby Proton Exchange Membrane Fuel Cell Systems by Impedance Measurement: First Results on Stack Characterization. 2012. Paper presented at 7th International Conference & Exhibition on Ecological Vehicles and Renewable Energies, EVER2012, Monte-Carlo, Monaco.