Robert Boschgmbh

Norman Krings

Juergen Hackenberg

Alexander Reitzle

Herbert Gruhn

Andreas Hebach

A fuel cell, having a first electrode, a second electrode, and a membrane element, in which the membrane element is disposed between the first electrode and the second electrode. At least one of the electrodes has a flow field plate and at least one flow conduit, through which a reactant can be conducted, extends in at least one outer surface of the flow field plate. The flow field plate has at least one microreaction chamber, and the microreaction chamber is disposed in the outer surface and on the flow conduit. A catalyst is disposed on at least a part of the microreaction chamber in such a way that the catalyst has contact simultaneously with the membrane element and the inflowing reactant.

Fuel cell flow field plate having catalyst disposed in microreaction chambers, and method for producing thereof

The invention relates to a pressure-relief valve of a housing for an electrical/electronic unit, particularly for a housing of a control unit of a motor vehicle, comprising a pressure equalization element, which comprises a membrane. It is provided that at least one hydrophobic layer () is located on the membrane (). The invention further relates to a housing () for an electrical/electronic unit (), particularly of a control unit () of a motor vehicle, comprising such a pressure-relief valve ().

Pressure-relief valve of a housing for an electrical/electronic unit

In a method for setting the distance between an electrode and a workpiece in electrochemical metal working, the electrode is moved by an oscillating drive system, in which an acceleration signal of the oscillating drive system is picked up, the acceleration signal is divided into individual sections, characteristic magnitudes of the individual sections of the acceleration signal are determined, the characteristic magnitudes of the individual sections are compared to one another and the distance of the electrode from the workpiece is adjusted in response to a deviation of the characteristic magnitudes from the specified values. A device for carrying out the method includes an electrode, that is connected to a drive axis, an oscillating motion being able to be transferred to the electrode via the drive axis. A sensor is situated on the drive axis which picks up acceleration signals.

Method for setting a distance between an electrode and a workpiece

The invention relates to a fuel cell, having a first electrode, a second electrode, and a membrane element, in which the membrane element is disposed between the first electrode and the second electrode. At least one of the electrodes has a flow field plate and at least one flow conduit, through which a reactant can be conducted, extends in at least one outer surface of the flow field plate. According to the invention, it is provided that the flow field plate has at least one microreaction chamber, and the microreaction chamber is disposed in the outer surface and on the flow conduit. A catalyst is disposed on at least a part of the microreaction chamber in such a way that the catalyst has contact simultaneously with the membrane element and the inflowing reactant.

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Ludwigsburg, Germany

Norman Krings