H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 8/04 (2006.01) G01N 27/22 (2006.01)
Patent
CA 2381964
The invention relates to a method for determining the fuel concentration in the electrolyte of fuel cells that are operated with liquid fuel and especially the concentration of methanol in the electrolyte of direct methanol fuel cells. The capacity of a capacitor is measured using the fuel/electrolyte- mixture as a dielectric. The dielectric constant of the mixture is determined on the basis of said capacity and the fuel concentration is subsequently determined.
L'invention concerne un procédé permettant de déterminer la concentration en combustible dans l'électrolyte de cellules électrochimiques actionnées par combustible liquide, notamment pour déterminer la concentration en méthanol dans l'électrolyte de cellules électrochimiques directes au méthanol. Selon l'invention, la capacité d'un condensateur est mesurée avec le mélange combustible-électrolyte comme diélectrique, la constante de diélectricité du mélange est ensuite déterminée sur la base des résultats obtenus et la concentration en combustible est ensuite déterminée.
Aktiengesellschaft Siemens
Fetherstonhaugh & Co.
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