Patent application number | Description | Published |
20090075130 | FUEL CELL SYSTEM AND METHOD FOR OPERATING SAME - A fuel cell system has recycle lines for recycling exhaust from the cathode and exhaust from the anode, with a recirculation device in each of the recycle lines. The recirculation devices are operated by a drive, such as a drive motor, with the drive and the two recirculation devices arranged on a common shaft. | 03-19-2009 |
20100028722 | Fuel Cell System with Ultrasonic Detector - The invention relates to a fuel cell system, having at least one channel system ( | 02-04-2010 |
20100111725 | FLUID FLOW MACHINE - A fluid flow machine includes a housing with a connecting piece for a working fluid on an intake side, and a pressure side. At least one impeller is mounted on a shaft, which is held in the housing by radial and axial bearings, and a cooling arrangement is provided for at least one bearing. A revolving part of the axial bearing is designed as a cooling fluid transportation device, wherein a suction connection leads to the intake side of the impeller. | 05-06-2010 |
20100239956 | Unit for a Fuel Cell System, and a Fuel Cell System - A flow unit such as may be provided as a recirculation device for an anode circuit of a fuel cell system has at least one moving element by which a two-phase flow with a liquid phase can be conveyed. At least one separator is arranged in or adjacent to the unit. | 09-23-2010 |
20110003238 | Pump and Fuel Cell System Having a Pump - A pump has a shaft, an impeller arranged on the shaft, and a labyrinth seal which is arranged between stationary and moving parts of the pump. A plurality of blades are arranged on the rotor and a labyrinth seal extends at least between the shaft and a rear portion of the blades. A gap in the labyrinth seal is designed such that liquid water can be actively carried away, with the labyrinth seal for this purpose being designed at least in places with a channel in the form of a spiral and/or a staircase. The invention also relates to a fuel cell system having such a pump. | 01-06-2011 |
20110008692 | Fuel Cell System - The potential energy from a hydrogen tank is used in a gas jet pump, which draws in anode waste gas via an inlet and recirculates it to an anode inlet. To ensure that this system operates effectively even under low loads, a part of the waste gas is supplied to a compressor, and the compressed waste gas is supplied to the motive jet inlet of a gas jet pump, which may be the same one to which the hydrogen from the tank is also supplied. Different gas jet pumps may also be used, for the hydrogen from the tank on the one hand, and the compressed waste gas on the other hand. | 01-13-2011 |
20110045368 | Apparatus for Recirculation of a Cathode Gas in a Fuel Cell Arrangement, Method for Shutting Down Such a Fuel Cell Arrangement - An apparatus for recirculation of a cathode gas in a fuel cell arrangement having a cathode gas supply for supplying the cathode gas to a cathode area, and a cathode gas outlet for carrying the partially consumed cathode gas out of the cathode area, includes a recirculation line for recirculation of the partially consumed cathode gas from a junction point in the cathode gas outlet into a supply point in the cathode gas supply. Blocking apparatus is provided to block the cathode gas supply in the flow direction upstream of the supply point and to block the cathode gas outlet in the flow direction downstream from the junction point, such that a closed circuit for the partially consumed cathode gas is formed when the blocking apparatus is closed. | 02-24-2011 |
20110053013 | Method for Operating a Fuel Cell System with a Recirculation Blower Arranged in a Fuel Circuit Thereof - In a method for operating a fuel cell system having recirculation blower arranged in a fuel cell circuit, fuel discharged from the anode exhaust is fed back to the inlet side of the fuel cell system via the recirculation blower. The direction of flow in the fuel return line is reversed in at least a portion of the return line, in an alternating manner. | 03-03-2011 |
20110164974 | Compressor and Method for Operating a Compressor and Fuel Cell Device with a Compressor - A compressor with a housing having an air guide section and a bearing section, and a moving part having a compressor wheel and a shaft connected to the compressor wheel in a pivot-proof manner. The shaft is pivot-supported in the bearing section, and the compressor wheel is accommodated in a first chamber of the air guide section in a pivoting manner. The shaft is driveable by an electric motor and at least one radial bearing and one axial bearing are provided for supporting the shaft in the bearing section, wherein the axial bearing has at least one magnetic bearing. The axial bearing includes at least one first bearing and a second bearing, the first bearing configured in the region of the compressor wheel and the second bearing is configured in the region of an end of the moving part facing away from the compressor wheel. | 07-07-2011 |
20130157154 | Fuel Cell System Having an Integral Turbine/Compressor Unit - A fuel cell system includes at least one fuel cell having an anode chamber, a cathode chamber, a hydrogen pressure reservoir, a recirculation line connecting an outlet of the anode chamber to an inlet of the anode chamber, a recirculation conveyor with a compressor wheel in the region of the recirculation line, and a turbine for expanding the hydrogen that is under pressure before entry into the anode chamber. The recirculation conveyor is driven at least partially by the turbine. The turbine and the compressor wheel are formed in one component. | 06-20-2013 |
20140087278 | Fuel Cell System - The potential energy from a hydrogen tank is used in a gas jet pump, which draws in anode waste gas via an inlet and recirculates it to an anode inlet. To ensure that this system operates effectively even under low loads, a part of the waste gas is supplied to a compressor, and the compressed waste gas is supplied to the motive jet inlet of a gas jet pump, which may be the same one to which the hydrogen from the tank is also supplied. Different gas jet pumps may also be used, for the hydrogen from the tank on the one hand, and the compressed waste gas on the other hand. | 03-27-2014 |
20140326738 | COMPRESSED GAS TANK AND METHOD FOR PRODUCING SAME - A compressed gas tank ( | 11-06-2014 |
20140370412 | Charging Device for a Fuel Cell, in Particular of a Motor Vehicle - A charging device for a fuel cell includes a turbine having a housing part with a receiving chamber in which a turbine wheel of the turbine is received so as to be rotatable relative to the housing part about an axis of rotation. The turbine wheel includes impeller vanes via which a medium, in particular a gaseous waste gas of the fuel cell, can flow against the turbine wheel in an inlet region, and which are curved forwards at least in the inlet region. | 12-18-2014 |