Reinz-dichtungs Gmbh

Raimund Ströbel

Bernd Gaugler

Joachim Scherer

Claudia Kunz

Kurt Hohe

Christian Schleier

Dominique Tasch

Dieter Grafl

Johann Waldvogel

Ludwig Jörissen

Lothar Quick

Kai Lemke

Albrecht Sailer

Stefan Sommer

Markus Lemm

The present invention relates to a bipolar plate () for electrochemical systems which contains a first plate () with a first flowfield () for media distribution as well as a second plate () with a second flowfield () for media distribution. This first plate in the region of the first flow field at least in regions comprises a plane surface section () from which discrete projections () distanced to one another project arranged in a distributed manner. Furthermore a method for manufacturing this bipolar plate is suggested as well as an electrochemical system which contains this bipolar plate. According to the invention it is possible in an inexpensive manner to manufacture a bipolar plate which permits the construction of fuel cells functioning with a low peripheral consumption (pumps, compressors) and which are safer with regard to their operation.

Bipolar plate and its use, as well as a method for its manufacture and an electrochemical system containing the bipolar plate

The invention deals with an electrochemical system for compressing gases and/or for producing gases by electrolysis, consisting of an electrochemical compressor stack () having layering of several electrochemical cells, which are separated from one another in each case by bipolar plates ('), wherein the bipolar plates have openings for media supply and media discharge () for the electrochemical cells and the electrochemical cell stack can be placed under mechanical compressive strain in direction () of the layering. The bead arrangements (&#x2032;) are resilient and are provided at least in some regions to seal the openings () and/or an electrochemically active region () of the electrochemical cells.

Electrochemical system with fluid passage integrated within a sealing bead

The present invention relates to a bipolar plate for fuel cells, comprising at least a shaped, at least partially electrically conductive foil (), the bipolar plate having a channel structure () formed by the shaping of the foil (), to convey reactants to electrodes of adjacent fuel cells and to carry away reaction products, and a microstructure () is integrated into the foil () to increase the rigidity of the foil (). The invention also relates to a method for manufacturing corresponding bipolar plates.

Bipolar plate for fuel cells, which is formed from a shaped foil, and method for manufacturing same

The present invention relates to bipolar plate () as well as to a fuel cell assembly (). The bipolar plate comprises two outer surfaces () which are electrically connected to one another, for the electrical contacting, as well as the discharge and supply of gases and/or fluids to the surfaces of the fuel cells which are adjacent to the outer surfaces. The bipolar plate comprises a frame () open in the central region as well as an inner part () arranged in the central reign, wherein the frame and the inner part are elastically connected to one another.

Bipolar plate

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Ulm, Germany

Raimund Ströbel