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Niedertemperatur-Brennstoffzelle mit integriertem Wassermanagementsystem fuer den passiven Austrag von Produktwasser

Low-temperature fuel cell, has diaphragm arranged between electrodes, and capillary structure including capillaries that exhibit hydraulic diameter, which permits evacuation of product water by capillaries using capillary force
 
: Bromberger, K.; Koenig, C.; Ackermann, V.

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Frontpage ()

DE 102009011239 A: 20090302
DE 102009011239 A: 20090302
H01M0008
German
Patent, Electronic Publication
Fraunhofer ISE ()

Abstract
(A1) Die Erfindung betrifft eine Niedertemperatur-Brennstoffzelle mit integriertem Wassermanagementsystem fuer den passiven Austrag von Produktwasser, die mindestens eine Membran-Elektroden-Einheit aufweist, die mindestens eine anodenseitige und eine kathodenseitige Elektrode sowie mindestens eine zwischen den Elektroden angeordnete Membran, anodenseitig und kathodenseitig angeordnete Stromableiterstrukturen sowie anodenseitig und kathodenseitig angeordnete Verteilungsstrukturen fuer Brennstoff und Oxidans aufweist. Hierbei weist die kathodenseitige Verteilungsstruktur eine Kapillarstruktur zum Abtransport des Produktwassers sowie Gaszufuehrungskanaele auf. Die Erfindung stellt somit ein in der Verteilungsstruktur integriertes Wassermanagementsystem bereit.

 

DE 102009011239 A1 UPAB: 20100925 NOVELTY - The cell has an anode-side electrode and a cathode-side electrode with a diaphragm electrode unit, and a diaphragm arranged between the electrodes. Distribution structures for fuel and oxidants are arranged at an anode-side and a cathode-side. The cathode-side distribution structure comprises fuel feed canals (4) and a capillary structure for an evacuation of product water by the cathode. Capillaries (3) of the capillary structure exhibit a hydraulic diameter, which permits evacuation of the product water by the capillaries using capillary force. DETAILED DESCRIPTION - The fuel feed canals comprises oval, rectangular, square, hexagonal, triangular and star or trapezoidal cross section. The distribution medium consists of a hydrophilic coating, and a hydrophilic capillary material such as micro-porous foam, fabric, fleece, ceramics, metal, polymer or natural fiber. An INDEPENDENT CLAIM is also included for a method for evacuation of the product water in a low-temperature fuel cell. USE - Low-temperature fuel cell. ADVANTAGE - The capillaries of the capillary structure exhibit the hydraulic diameter, which permits the evacuation of the product water by the capillaries by using capillary force, thus achieving efficient evacuation of the product water without impairing gas supply of the cathode, increasing the efficiency of the fuel cell during continuous operation, and hence improving the water management in the fuel cell.

: http://publica.fraunhofer.de/documents/N-148766.html