Daimler Ag

Thomas Diedrich

Gert Hinsenkamp

Patrick Mangold

Martin Heumos

The invention relates to a fuel cell stack () of a fuel cell system that is to be hermetically sealed off from the environment after operation is ended so that only a finite amount of air oxygen remains in the fuel cells, thus preventing the fuel cells from excessively aging. According to the invention, locking means () are provided that are disposed on or in an end plate () or distributor plate of the fuel cell stack (). The locking means () are therefore thermally coupled to the end plate () and may freeze up at cold ambient temperatures. In a preferred embodiment, the locking means () comprise an elastomer body () able to cover and uncover a channel () in the plate ().

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Gerwisch, Germany

Thomas Diedrich