Abstract: The invention relates to a modular flow frame 10 for an electrochemical cell, in particular for a cell of a redox flow battery stack, comprising a main frame body 14, which defines a frame opening 18, wherein the main frame body has a preferably substantially U-shaped cross-sectional profile which is open on one side in the direction of the frame opening, so that a profiled receiving space 26 open toward the frame opening is formed, moreover comprising an insert 16 which is arranged in the profiled receiving space of the main frame body, the insert having channel structures for distributing fluids in the frame opening. The invention further relates to a flow frame electrode unit, a cell, a cell stack and a method for producing a flow frame.

Abstract: A fuel cell system comprises at least one fuel cell with a high-temperature polymer electrolyte membrane. The fuel cell is supplied with liquefied petroleum gas from a supply of liquefied petroleum gas. The liquefied petroleum gas can be directly fed into an anode reaction chamber of the fuel cell without complex reforming. Water vapor is admixed to the liquefied petroleum gas before it enters the anode reaction chamber.

Abstract: A reformer fuel cell system having a plurality of components, that are a plurality of partial reformer systems forming a reformer for the generation of a hydrogen-rich gas and a fuel cell for the generation of electric current with use being made of the hydrogen-rich gas. A burner device is arranged outside of the reformer and the fuel cell is provided for the generation of a hot exhaust gas. An exhaust gas supply assembly supplies the exhaust gas to at least two of the components wherein the exhaust gas supply assembly defines the flow path of the exhaust gas such that the exhaust gas flows to and/or through the components according to the level of their particular operating temperature in descending temperature order. In this manner, it is easily possible to directly heat up the individual components to the level of their particular operating temperature in a selective manner.

Abstract: A fuel cell system comprises at least one fuel cell with a high-temperature polymer electrolyte membrane. The fuel cell is supplied with liquefied petroleum gas from a supply of liquefied petroleum gas. The liquefied petroleum gas can be directly fed into an anode reaction chamber of the fuel cell without complex reforming. Water vapor is admixed to the liquefied petroleum gas before it enters the anode reaction chamber.

Abstract: A reformer fuel cell system having a plurality of components, that are a plurality of partial reformer systems forming a reformer for the generation of a hydrogen-rich gas and a fuel cell for the generation of electric current with use being made of the hydrogen-rich gas. A burner device is arranged outside of the reformer and the fuel cell is provided for the generation of a hot exhaust gas. An exhaust gas supply assembly supplies the exhaust gas to at least two of the components wherein the exhaust gas supply assembly defines the flow path of the exhaust gas such that the exhaust gas flows to and/or through the components according to the level of their particular operating temperature in descending temperature order. In this manner, it is easily possible to directly heat up the individual components to the level of their particular operating temperature in a selective manner.

Abstract: The invention relates to a fuel cell system comprising a plurality of individual polymer electrolyte membrane fuel cells (2) arranged one on top of the other in the form of a stack (3) wherein, between adjacent individual fuel cells (2) of the stack (3), there is provided one intermediate space (10) each for receiving a cooling medium (13), or adjacent individual fuel cells (2) are confined by bipolar plates (7) having passages (12) for receiving a cooling medium, and cooling medium distribution spaces (15) and cooling medium collection spaces (18) being provided on lateral faces (23) of the stack. For cooling the fuel cell stack (1), cooling medium flows into a cooling medium distribution space (15) through the intermediate spaces between the individual fuel cells or the passages in the bipolar plates and finally into a cooling medium collection space from where it leaves the fuel cell system.