Importance

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Abstract

The fuel cell battery, which contains a stack of planar cells, has the following features: a) Electrochemically active plates--so-called PENs--and interconnectors are arranged in an alternating sequence. b) The PENs and accordingly the interconnectors have in each case a first edge and a second edge, between which a straight or curved zone with a largely constant width extends. c) This zone is subdividable into sectors through which the two edges are connected. d) The interconnectors have profilings by means of which two fluids can be separately conducted through the cells. e) In each sector there are provided entry points for the first fluid at the first edge, entry points for the second fluid at the second edge as well as outlet points for both fluids. f) The outlet points open into a common passage. g) The second fluid is provided as a heat carrier medium for reaction heat which is liberated during an operation at the PEN. h) The interconnectors are single layered and their profiling is in each case executed in such a manner that both fluids are always conducted in contact with the PEN. i) At the first edge a turning region is provided by means of which a reversal of the flow direction of the second fluid results. k) Furthermore, the dimensioning of the cells is executed in such a manner that harmful thermal stresses in the PEN are not exceeded during the operation.

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First Claim