Fuel cell stack with decreased open circuit voltage

H - Electricity – 01 – M

Patent

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Details

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

Patent

CA 2462696

A fuel cell stack which comprises a plurality of unit fuel cells (1) laminated via separators (4), and is connected to external resistors (6) each allowing a feeble current to flow to each unit fuel cell (1), whereby such problems as an open-circuit voltage generation and corrosion that may be caused by fuel gas remaining after operation shutdown can be resolved. A switch (8) is preferably attached in series with an external resistor (6).

L'invention concerne une pile de cellules électrochimiques comportant une pluralité de cellules électrochimiques (1) laminées par l'intermédiaire de séparateurs (4). Ladite pile de cellules électrochimiques est connectée à des résistances extérieures (6) permettant chacune le passage d'un courant faible vers chaque cellule électrochimique (1). La pile de cellules électrochimiques selon l'invention permet de résoudre des problèmes tels que la production d'une tension de circuit ouvert ou la corrosion, pouvant être causés par la présence de gaz combustibles résiduels à la fin de l'opération. Un interrupteur (8) est de préférence monté en série avec une résistance extérieure (6).

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