Abstract: Light weight and efficient airbag filter devices are made from expanded metal strips. In some embodiments, an expanded metal strip is a bi-directionally expanded metal sheet where the blade alternately comes from the top-down direction as well as from the bottom-up direction, so that one continuous strip of steel can be expanded facing up in one section and then facing down in the next section without cutting or removing the strip from the processing line. In some embodiments, an expanded metal strip may be crimped variably based upon the layer's length. In some embodiments, bi-directional expanding may be combined with variable crimping of the individual sections/layers allowing for a single strip of metal to be both expanded in two directions and crimped layer by layer during a continuous process on one sheet of metal.

Abstract: A contact used to electrically connect High-temperature density fuel cells together is provided. The contact includes at least one hollow cord which each has at least three contact surfaces with the fuel cell, of which two contact surfaces connect neighboring anode surfaces and the third contact surface connects the interconnector of the next High-temperature density fuel cell. A method for producing a fuel cells system including high-power density fuel cells is also provided.

Abstract: A fuel cell and/or electrolyzer, and a method of producing a fuel cell and/or electrolyzer. The fuel cell and/or electrolyzer has an electrolyte layer, one side of which is in contact with a cathode layer and the other side of which is in contact with an anode layer. The anode layer is electrically and/or mechanically in contact with a first interconnector. In the area of a free side of the cathode layer a contacting device is arranged, which is connected in an electrically conductive and mechanically material-to-material and/or positive manner with a second interconnector as well as with the cathode layer.

Abstract: For manufacturing an individual fuel cell, first a knit or a similar porous support structure, such as, for example, a fabric, weave or plait of one or more metal wires is produced, upon which subsequently an cathode-electrolyte-anode unit is applied coat-by-coat and step-by-step. A fuel cell stack can then be assembled from the individual cells, with the individual cells separated from one another by bipolar plates. Locally different resistances to flow are provided to influence the reaction sequence in the individual fuel cell in a desired manner.