Fuel cell stack assembled with single cells categorized in a...

H - Electricity – 01 – M

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H01M 8/00 (2006.01) H01M 8/02 (2006.01) H01M 8/04 (2006.01) H01M 8/24 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2410190

A pressure loss in an oxidative gas passage of each of single cells is obtained by causing gas to flow through the oxidative gas passage and calculating a difference between gas pressures detected by first and second pressure gauges. This pressure loss is compared with predetermined ranks so as to carry out classification according to the ranks. The pressure loss in the oxidative gas passage has a predetermined permissible range that is divided into two or more small ranges, which are referred to as a first rank, a second rank, ...., and an n-th rank respectively. The single cell that is to be measured at the moment is classified into a certain one of the ranks depending on which one of the first to n-th ranks corresponds to the pressure loss in the oxidative gas passage. Classification is similarly carried out as to a pressure loss in a fuel gas passage as well. Those of the single cells which are equivalent in rank are gathered up and combined to fabricate a fuel cell.

Une perte de pression dans un passage de gaz oxydant de chacune des cellules, est obtenue en faisant circuler le gaz à travers le passage de gaz oxydant et en calculant la différence entre les pressions de gaz détectées par le premier et le second manomètres. Cette perte de pression est comparée aux catégories prédéterminées. La perte de pression dans le passage de gaz oxydant présente une plage admissible prédéterminée qui est divisée en deux ou plusieurs petites plages, désignées sous le nom de "première catégorie", "deuxième catégorie"..., et "n ième catégorie", respectivement. La cellule unique doit être mesurée au moment de sa classification dans l'une des catégories qui correspond à la perte de pression dans le passage de gaz oxydant. La classification est effectuée de la même manière que pour une perte de pression dans un passage de gaz combustible. Les cellules uniques de la même catégorie sont rassemblées et combinées to fabriquer une pile à combustible.

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