Hexis Ag

Andreas Mai

Roland Denzler

Hanspeter Kuratli

Dirk Haberstock

Josef Sfeir

Boris Iwanschitz

Christoph Meier

Fabian Brogle

Fleischhauer Felix

Markus Linder

Felix Fleischhauer

A fuel cell module includes fuel cells, a gas supply system, a first accumulator, a second accumulator, and power connection. The fuel cells are arranged in a cell stack having a first axial end and a second axial end. The gas supply system is configured to supply gas for the operation of the fuel cells, the fuel cells being stacked in an axial direction. The first accumulator is arranged at the first axial end of the cell stack. The second accumulator is arranged at the second axial end of the cell stack. The power connection is electrically conductively connected to the second accumulator, and is arranged at the gas supply system. The cell stack is arranged within an insulation sheath and the gas supply system is arranged partly outside the insulation sheath and the power connection is arranged outside the insulation sheath.

Fuel cell module

A method for producing a metallic interconnector for a fuel cell stack, including an air guiding surface with a first gas distributor structure and a fuel gas guiding surface with a second gas distributor structure, the first gas distributor structure and the second gas distributor structure each formed by grooves and webs, includes providing a sheet metal blank, forming the sheet metal blank by a plastic molding process, the first gas distributor structure and the second gas distributor structure being formed in such a manner that the grooves and webs of the first gas distributor structure are arranged complementary to the grooves and webs of the second gas distributor structure at a predeterminable percentage of area of the air guiding surface and the fuel gas guiding surface of at least 50% and at most 99%.

Method of producing a metallic interconnector for a fuel cell stack and a metallic interconnector produced by the method

A fuel cell module includes fuel cells and an air supply system. The fuel cells are arranged in a cell stack. The air supply system is configured to supply air into an air distribution space for operating or cooling the fuel cells. The fuel cells are stacked in an axial direction. The air supply system is configured such that cooling results due to the air supplied to the fuel cells not being of uniform strength in the axial direction. The air supply system is arranged completely radially outside the cell stack.

Fuel cell module and method of operating a fuel cell module

In a method for regulating a fuel cell stack (), a current-voltage characteristic of the fuel cell stack is detected and evaluated to determine an operating point of the fuel cell stack, wherein a current-voltage characteristic of the fuel cell stack () is detected at time intervals in operation whose gradient has a minimum, a characteristic value (R) for the minimum of the gradient is respectively determined from the detected current-voltage characteristic and a desired value for the operating point is determined by addition of a predefined offset value (R) to the characteristic value, and wherein the fuel cell stack () is regulated by the desired value determined in this manner.

Method and regulation apparatus for regulating a fuel cell or a fuel cell stack

Disclosed is method of operating a fuel cell which can output an electrical maximum power dependent on the operating temperature for a given fuel gas flow, and which exhibits aging in dependence on the operating duration which brings about an increase of the electrical internal resistance with progressive operating duration. In the disclosed method, the starting value (T) of the operating temperature for a new fuel cell or for a new fuel cell stack is typically smaller than or equal to the operating temperature, at which the electrical maximum power is achieved and the fuel cell or the fuel cell stack is regulated such that the decrease of the output electrical power as a consequence of aging is partly or completely compensated in that the operating temperature (T) of the fuel cell or of the fuel cell stack is increased with progressive aging.

Method and regulation apparatus for operating a fuel cell or a fuel cell stack

A fuel cell system () having a cell stack () for the carrying out of electrochemical reactions is provided which is provided with inlets () for an oxidant () and for fuel gas () and with outlets () for exhaust gases (). The fuel cell system () additionally includes an apparatus () having a gas-permeable structure which contains a substance which reacts with gaseous chromium species, wherein the apparatus is in communication with at least one of the outlets to direct exhaust gases through the apparatus and to separate chromium species which are carried along by the exhaust gases.

Growing community of inventors

Constance, Germany

Andreas Mai