System and method for measuring fuel cell voltage and high...

Details System and method for measuring fuel cell voltage and high... System and method for measuring fuel cell voltage and high...

G - Physics

01

R

G01R 31/36 (2006.01)

Patent

CA 2477465

A method and apparatus are provided for measuring impedance and voltage characteristics of cells of multi-cell electrochemical devices, for example a battery or a fuel cell stack. Voltages are measured across individual cells, or groups of cells. At the same time, a load is connected in series with the electrochemical device. Both the device for measuring the voltages and the load are controlled together, preferably by means of a controller, which can include some form of microprocessor. This enables the load to be controlled to provide a desired combination of DC and AC current characteristics. By setting appropriate DC and AC current characteristics, desired characteristics of the impedance of individual cells can be measured.

La présente invention concerne un procédé et un appareil destinés à mesurer les caractéristiques d'impédance et de tension des cellules de dispositifs électrochimiques à cellules multiples, tels qu'un accumulateur ou un empilement de piles à combustible. Les tensions sont mesurées aux bornes de cellules individuelles ou de groupes de cellules. En même temps, une charge est reliée en série au dispositif électrochimique. Le dispositif de mesure des tensions et la charge sont commandés ensemble, de préférence au moyen d'un contrôleur qui peut comprendre une forme quelconque de microprocesseur. Ceci permet de régler la charge afin d'obtenir une combinaison désirée de caractéristiques de courant continu et de courant alternatif. En fixant des caractéristiques appropriées de courant continu et courant alternatif, on peut mesurer des caractéristiques désirées de l'impédance de cellules individuelles.

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