Method and device for improving the service life of a fuel cell at transitions in operation

Method and device for improving the service life of a fuel cell at transitions in operation

The subject of the present invention relates to a method and a protector for reducing degradation of fuel cell systems at transitions in operation, in particular at electrodes or catalysts in a combustion chamber of a stack of a PEM fuel cell system in startup and shutoff events of the fuel cell sys...

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Hauptverfasser: WAHL FLORIAN, SCHAEFERT ARTHUR, MAASS SEBASTIAN, INTORP JENS, BAUMANN FRANK, FRIEDE WOLFGANG, WIEDEMANN GUNTER, LIMBECK UWE
Format: Patent
Sprache:eng
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BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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creator WAHL FLORIAN
SCHAEFERT ARTHUR
MAASS SEBASTIAN
INTORP JENS
BAUMANN FRANK
FRIEDE WOLFGANG
WIEDEMANN GUNTER
LIMBECK UWE
description The subject of the present invention relates to a method and a protector for reducing degradation of fuel cell systems at transitions in operation, in particular at electrodes or catalysts in a combustion chamber of a stack of a PEM fuel cell system in startup and shutoff events of the fuel cell system. A switchable material delivery device is provided for varying a delivery of material to the fuel cell system, so that a transition from a first state of the fuel cell system to a second state of the fuel cell system can be initiated, such that a potential difference between different electrodes can be effected. At least one reducing mechanism is provided for reducing the potential difference between the different electrodes during the transition, in which the reducing mechanism includes at least one compensating device for an unequal gas distribution by reducing the proportions causing degradation, to reduce degradation. The compensation device includes at least one short-circuiting unit, with which the different electrodes can be short-circuited, in order to reduce the potential difference.
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subjects BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
title Method and device for improving the service life of a fuel cell at transitions in operation
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