Dana Canada Corporation

Reinz-dichtungs Gmbh

Zentrum Fur Sonnenenergie Und Wasserstoff-forschung Baden Wuetternberg Gemeinnuetzige Stiftung

Raimund Stroebel

Joachim Scherer

Doug Vanderwees

Bernd Gaugler

Michael Bardeleben

Rainer Glueck

Dieter Grafl

Christian Schleier

Bernd Rohland

Joachim Scholta

Lothar Quick

Bernadette Gruenwald

Klaus Eberle

An integrated gas management device (GMD) for a fuel cell has a gas-to-gas humidifier for transferring water from a second gas to a first gas; and a heat exchanger attached to a first end of the humidifier core for cooling the first gas. The GMD may optionally have a thermal isolation plate between the heat exchanger and the first end of the humidifier core. The GMD further has a bypass line to allow the first gas to bypass the humidifier. The first gas may be cathode charge air and the second gas may be cathode exhaust.

Integrated gas management device for a fuel cell system

An electrochemical system has at least one endplate, a terminal bipolar plate as well as a sealing device arranged between the endplate and the terminal bipolar plate. The materials of the terminal bipolar plate and the endplate have different coefficients of thermal expansion and with the sealing device being designed in such a way that during temperature changes, the sealing function is also given by a sliding of the endplate and/or the terminal bipolar plate along the sealing device.

Electrochemical system

An integrated gas management device (GMD) for a fuel cell comprises a gas-to-gas humidifier for transferring water from a second gas to a first gas; a heat exchanger attached to a first end of the humidifier core for cooling the first gas; and/or a water separator attached to a second end of the humidifier core for removing liquid water from the second gas. The GMD may optionally comprise a thermal isolation plate between the heat exchanger and the first end of the humidifier core. The GMD further comprises a bypass line to allow the first gas to bypass the humidifier. The first gas may comprise cathode charge air and the second gas may comprise cathode exhaust.

The present invention relates to a contact plate for fuel cells with a coherent active area () on at least one side of the contact plate, wherein the active area () consists of a contact surface () which over the whole surface comprises a coating () of an electrically conductive, corrosion-resistant material, and of recesses () so that the recesses () form a channel structure, wherein the coating () furthermore at least in the bottom regions () of the recesses () is omitted. The invention further relates to a corresponding fuel cell or to a fuel cell stack with at least one such contact plate as well as to various methods for manufacturing such contact plates which may serve as bipolar plates as well as monopolar plates or end plates. With the contact plate according to the invention, one achieves an optimally reduced contact resistance with a minimal material expense for the coating ().

Contact plate for fuel cells

The invention relates to a device for combined purification and compression of hydrogen containing CO. Said device comprises a polymer electrolyte membrane (PEM) cell with a proton-conducting polymer membrane ( ), an anode on one side of the membrane and a cathode ( ) on the other side thereof. Said anode is in the form of a two-layer anode ( ) which comprises a CO-oxidation-selective catalytic layer ( ) on the side facing away from the membrane and an electrochemically active layer ( ) for oxidation of the hydrogen to form protons on the side facing the membrane. The PEM cell also has a flat, porous gas distribution layer provided on the anode side and attached to a current collector. Consequently, the PEM cell resists differential pressures of at least approximately 10 bar. The invention also relates to a process for combined purification and compression of hydrogen containing CO using said device. The CO in the hydrogen containing CO is oxidized selectively to form CO in the PEM cell, and the hydrogen subsequently extensively free of CO is compressed by the PEM cell by electrochemical means at differential pressures of at least approximately 10 bar. The resultant hydrogen is suitable as fuel in PEM fuel cells for vehicles.

Device and method for combined purification and compression of hydrogen containing CO and the use thereof in fuel cell assemblies

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Ulm, Germany

Raimund Stroebel