Measurement of fuel cell impedance

Details Measurement of fuel cell impedance Measurement of fuel cell impedance

G - Physics

01

R

G01R 31/36 (2006.01) G01R 27/02 (2006.01)

Patent

CA 2423728

This invention discloses a self-contained, portable, cost-effective apparatus for measuring the real and imaginary components of a fuel cell's complex impedance at discrete frequencies. The apparatus comprises a CPU, a signal generation device, a fuel cell, a load bank, current and voltage sensing circuitry and a waveform acquisition device. The measurements can be done in real time and automated. The fuel cell's internal resistance can be calculated thereby providing an indication of the electrical efficiency of the fuel cell.

L'invention concerne un appareil portable, rentable et autonome permettant de mesurer les composants réels et imaginaires de l'impédance complexe d'une pile à combustible à des fréquences discrètes. Cet appareil comprend une unité centrale, un dispositif d'émission de signaux, une pile à combustible, un banc d'essai, des circuits de détection de courant et de tension et un dispositif d'acquisition de formes d'onde. Les mesures peuvent s'effectuer en temps réel et peuvent être automatisées. La résistance interne de la pile à combustible peut se calculer, de manière à obtenir une indication de l'efficacité électrique de la pile à combustible.

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