| Staxera GmbH Patent applications |
| Patent application number | Title | Published |
|---|
| 20110300463 | CONTROL EQUIPMENT FOR INTENDING AN ACTUAL FUEL CONVERSION FOR A GAS CELL ARRANGEMENT PROCEDURE FOR THE DETERMINATION OF A FUEL CONVERSION OF A GAS CELL ARRANGEMENT AND GAS CELL ARRANGEMENT - The present invention describes a control device for determining an actual fuel turnover for a fuel cell arrangement comprising a voltage reception device for receiving values of a voltage applying over the fuel cell arrangement, a fuel flow setting device for setting a flow of fuel supplied or suppliable to a fuel cell arrangement and/or a current setting device for setting an electrical current output by the fuel cell arrangement, as well as a memory for storing calibration data describing a nominal relation between the fuel turnover of the fuel cell arrangement and a voltage applying over the fuel cell arrangement. The control device is adapted to receive a first voltage value; to control a variation of the flow of fuel supplied to the fuel cell arrangement and/or the current output by the fuel cell arrangement after receiving the first voltage value; and to receive a second voltage value after the variation. In addition, the control device is adapted to determine the actual fuel turnover of the fuel cell arrangement based on the first voltage value, the second voltage value and the calibration data. Moreover, the invention pertains to a corresponding method and a fuel cell arrangement. | 12-08-2011 |
| 20110275002 | INTERCONNECTOR ARRANGEMENT FOR A FUEL CELL STACK - The invention relates to an interconnector arrangement for a fuel cell stack, which can be brought into electrical contact with at least one membrane electrode assembly and which is arranged to separate a cathode flow field of the fuel cell stack from an anode flow field of the fuel cell stack. The invention is characterized in that the interconnector arrangement comprises a hollow space separated from the anode flow field and from the cathode flow field such that a flow of gas through the hollow space may not be more than five percent of flow-off gas through the cathode flow field or the anode flow field. The invention also relates to a fuel cell stack and to a method for manufacturing an interconnector arrangement. | 11-10-2011 |
| 20110269048 | REPEATING UNIT FOR A FUEL CELL STACK - A repeating unit ( | 11-03-2011 |
| 20110229788 | FUEL CELL STACK - The invention relates to a fuel cell stack with a plurality of membrane electrode assemblies (MEAs) and a plurality of bipolar plates, wherein at least one surface of a first bipolar plate runs in undulating fashion, meandering fashion or zig-zag-shaped fashion and extreme points of the surface of the bipolar plate make contact with a first surface of a MEA at contact points. The invention provides that at least some of the contact points are associated with mating contact points on a second surface of the MEA, which surface is opposite the first surface of the MEA, with a surface of a second bipolar plate making contact with said mating contact points, and that the contact points and the associated mating contact points are positioned one above the other in the stacking direction. The invention also relates to a method for producing a fuel cell stack. The invention furthermore relates to a bipolar plate for a fuel cell stack, with an undulating, meandering or zig-zag-shaped upper surface, a lower surface, a left-hand wall, and a right-hand wall. | 09-22-2011 |
| 20110070509 | FUEL CELL SYSTEM HAVING TWO FUEL CELL STACKS CONNECTED IN SERIES - The invention relates to a fuel cell system comprising a first exothermally operated fuel cell stack and a second non-exothermally operated fuel cell stack, wherein anode waste gas containing water molecules from the first fuel cell stack can be supplied to the second fuel cell stack, and wherein hydrocarbons can be admixed to the anode waste gas by way of a feed line. According to the invention, it is contemplated that the anode waste gas of the first fuel cell stack can be supplied to the second fuel cell stack in an uncooled state. The invention further relates to a method for operating a fuel cell system. | 03-24-2011 |
| 20110045362 | OXIDATION-RESISTANT COMPOSITE CONDUCTOR AND MANUFACTURING METHOD FOR THE COMPOSITE CONDUCTOR - A composite conductor for electric current comprises a core made of a first material and a jacket made of a second material, wherein the second material has a lower electrical conductivity than the first material. The second material is oxidation-resistant at temperatures up to at least 600° C., in particular at temperatures up to at least 800° C., in particular at temperatures up to at least 900° C. A fuel cell system comprises at least one fuel cell, to which a composite conductor according to the present invention is connected. A manufacturing method for a composite conductor comprises following steps: Provision of a core made of a first material and encasing the core by a second material having a lower electrical conductivity than the first material. The second material is oxidation-resistant at temperatures up to at least 600° C., in particular at temperatures up to at least 800° C., in particular at temperatures up to at least 900° C. | 02-24-2011 |
| 20100285383 | REPEATER UNIT FOR A FUEL CELL STACK - The invention relates to a repeating unit for a fuel cell stack comprising a membrane electrode assembly and a flow field designed to supply an active surface of the membrane electrode assembly with gas and comprising at least a gas passage orifice. According to the invention it is contemplated that a gas-tight gas flow barrier is disposed between the active surface and the gas passage orifice so that gas passing through the first gas passage orifice flows around the gas flow barrier, wherein the projection of the gas flow barrier towards the periphery of the active surface is at least half as long as the projection of the gas passage orifice towards the periphery of the active surface. | 11-11-2010 |
| 20100196777 | BRACING OF A HIGH TEMPERATURE FUEL CELL STACK - The invention relates to a bracing plate for bracing a fuel cell stack. According to the invention it is contemplated that the bracing plate is formed of a plurality of layers, a first layer facing the fuel cell stack and a second layer disposed adjacent to the first layer and arranged on the side opposing the fuel cell stack being provided, the second layer having a higher bending rigidity than the first layer. | 08-05-2010 |
| 20100129733 | INTERCONNECTOR ARRANGEMENT AND METHOD FOR PRODUCING A CONTACT ARRANGEMENT FOR A FUEL CELL STACK - The invention relates to an interconnector arrangement for a fuel cell stack, which arrangement can be brought into electrical contact with at least one membrane electrode assembly of the fuel cell stack. The invention is characterized in that the interconnector arrangement comprises a nickel foam which is interposed between at least one housing part of the interconnector arrangement and the membrane electrode assembly to establish an electrically conducting connection. The invention also relates to a method for manufacturing a contact arrangement for a fuel cell stack. | 05-27-2010 |
| 20100104914 | CONTACT ARRANGEMENT AND METHOD FOR ASSEMBLING A FUEL CELL STACK FROM AT LEAST ONE CONTACT ARRANGEMENT - The invention relates to a contact arrangement for a fuel cell stack, especially for an SOFC fuel cell stack, comprising an interconnector arrangement which is arranged to establish an electrically conducting connection via at least one contact element on the anode side and at least one such element on the cathode side between an anode of a first membrane electrode assembly and a cathode of a second membrane electrode assembly. The invention is characterized in that at least one component to be sintered is provided on only one side of the interconnector arrangement, on the side of the interconnector arrangement facing the anode or the one facing the cathode, the component being coupled to the first or second membrane electrode assembly in such a manner that the electrically conducting connection can be established via the contact element on the anode side or via that on the cathode side by sintering the component to be sintered. The invention also relates to a method for assembling a fuel cell stack form at least one such contact arrangement. The invention further relates to a fuel cell stack, especially an SOFC fuel cell stack, comprising said contact arrangement, the fuel cell stack preferably being assembled according to the aforementioned method. | 04-29-2010 |
| 20100068602 | FUEL CELL STACK AND SEAL FOR A FUEL CELL STACK, AS WELL AS A PRODUCTION METHOD FOR IT - The invention relates to a sealing for the gas-tight connection of two elements of a fuel cell stack comprising an electrically non-conducting spacer component and at least one solder component solid or viscous over its entire extension at the operating temperature of the fuel cell stack and coupling the spacer component to at least one of the elements to be connected of the fuel cell stack in a gas-tight manner. According to the invention it is envisaged that the spacer component is formed of a ceramic material. The invention further relates to a fuel cell stack in which, according to the invention, it is envisaged that a distribution of forces compressing the fuel cell stack in the axial direction is directly transmitted to at least one of the elements to be connected by the spacer component. The invention further relates to production methods for seals and fuel cell stacks. | 03-18-2010 |
| 20100062290 | METHOD FOR TESTING THE IMPERMEABILITY OF A FUEL CELL STACK - The invention relates to a method for testing the leak-tightness of a fuel cell stack comprising the steps of operating the fuel cell stack using defined gas supply rates, a defined modification of at least one gas supply rate, detecting at least one cell or cell group voltage and analysing the variation in time of the at least one cell or cell group voltage. | 03-11-2010 |
| 20090297904 | SOFC Stack - The invention relates to a SOFC stack with bipolar plates ( | 12-03-2009 |
