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| Number | Title | Issue Date |
| 7820313 | Fuel source recognition and gating apparatus and associated method A gating device (100) and associated method (900) for identifying a fuel container (101) used to refill a fuel cell (102) are presented. A fuel source identification device (103) identifies a fuel container (101) to verify t... | 10/26/2010 |
| 7807307 | System and method for distributing fuel to multiple fuel cells A Personal Area Network (PAN) (100) including multiple communication devices (104, 106, 108) is provided. The communication devices are capable of communicating with each other and a connection point. The communication devices derive energy from multip... | 10/05/2010 |
| 7781084 | Cathode humidification of a PEM fuel cell through exhaust gas recirculation into a positive displacement compressor A fuel cell stack receiving oxidant into a compressor progressively pressurizing the oxidant from an inlet pressure to a discharge pressure where a fluid connection exists between oxidant effluent from the fuel cell stack and the progressively pressurized oxidant wi... | 08/24/2010 |
| 7781107 | Fuel cell system As a freezing judgment mechanism, comprised in a gas-liquid separator are electrodes and, an iron core, a magnetic absorption substance located within the water, and guides and for controlling the operation of the magnetic absorption substance. The control unit appl... | 08/24/2010 |
| 7781114 | High electrical performance direct oxidation fuel cells & systems A direct oxidation fuel cell (DOFC) system, comprises at least one fuel cell assembly including a cathode and an anode with an electrolyte positioned therebetween, adapted for performing selected electrochemical reactions; a source of concentrated liquid fuel in flu... | 08/24/2010 |
| 7771855 | Fuel cell system including a two-position back-pressure valve A fuel cell system that employs a two-position valve at the cathode exhaust gas output for controlling the pressure within the fuel cell stack to control the stack relative humidity. In one embodiment, the two-position valve is switchable between a fully open and a ... | 08/10/2010 |
| 7767328 | Fuel cell optimum operation point tracking system in power supply device using fuel cell and power supply device provided with this fuel cell optimum operation point tracking system The present invention provides a fuel cell optimum operating point tracking system capable of ensuring optimum operation of a fuel cell, by detecting the optimum operation voltage of the fuel cell taking not only temperature dependence of the output characteristics ... | 08/03/2010 |
| 7758985 | Fuel cell sensors and methods Control systems, sensors and methods for controlling the fuel concentration in a fuel cell or a fuel cell stack are provided. In certain examples, the control system may be configured to detect a performance degradation, and the fuel concentration provided to the fu... | 07/20/2010 |
| 7749626 | Fuel cell power generating system with two fuel cells of different types and method of controlling the same A solid oxide fuel cell stack generates power by an electrochemical reaction of oxygen with hydrogen or hydrogen and carbon monoxide in a reformed gas which is produced from a natural gas by a reformer, and supplies waste heat and an anode exhaust gas containing ste... | 07/06/2010 |
| 7749627 | Fuel cells and methods for operating said fuel cells A fuel cell that uses one or more types of fuel comprises a fuel cell stack, a reservoir connected to the fuel cell stack, and a supply valve that controls the supply of the fuel from its fuel source. Furthermore, methods for operating a fuel cell includes the steps... | 07/06/2010 |
| 7740963 | Liquid fuel type fuel cell system and its operating method A direct methanol type fuel cell system provided with a tank for storing an antifreeze that is injected into at least said unit cell or a cell stack and held in place at the time of stand-by operation of the direct methanol type fuel cell system. At the time of star... | 06/22/2010 |
| 7740964 | Adaptive anode nitrogen management control A method is provided for controlling the concentration of nitrogen in a fuel cell stack. The method includes providing a fuel cell stack with cathode passages and anode passages including a valve in communication with the anode passages. The method further comprises... | 06/22/2010 |
| 7736777 | Control assembly for controlling a fuel cell system during shutdown and restart A fuel cell system and method in which the fuel cell system receives and an input oxidant gas and an input fuel gas, and in which a fuel processing assembly is provided and is adapted to at least humidify the input fuel gas which is to be supplied to the anode of th... | 06/15/2010 |
| 7718287 | Compact anode flow shift design for small fuel cell vehicles An anode inlet unit for a split fuel cell stack or two fuel cell stacks having two anode inlets. The anode inlet unit has particular application for a small vehicle that requires less power. In one embodiment, the anode inlet unit only includes three injectors. Two ... | 05/18/2010 |
| 7718286 | Abnormality detecting device of fuel cell system An abnormality detecting device of a fuel cell system according to the invention includes a hydrogen off-gas circulation passage for making hydrogen off-gas discharged from a fuel cell flow back to an anode; a discharge passage for discharging part of the hydrogen o... | 05/18/2010 |
| 7687168 | Fuel cell system for setting predetermined operation state when substitutional value control is impossible A fuel cell system installed in a fuel-cell movable body. The system includes a fuel cell for generating electric power using reaction gases; a plurality of sensors for measuring states of the fuel cell; an abnormal state detecting device for detecting an abnormal s... | 03/30/2010 |
| 7687167 | Power supply unit A clean power supply unit with a high fuel utilization rate using a fuel cell is provided. The power supply unit of the present invention comprises a fuel cell using methanol as fuel; a secondary battery for supplying power to a load; a fuel cell control part for co... | 03/30/2010 |
| 7674541 | Hydrogen gas supply device and fuel cell apparatus The hydrogen gas supply device capable of detecting that the hydrogen gas storage volume of a tank has decreased to a predetermined value or less including a plurality of tanks each filled with a hydrogen storage alloy, an information obtaining device for obtaining ... | 03/09/2010 |
| 7670700 | Fuel cell system, related method and current measuring device for fuel cell system A fuel cell system, control method and current measuring device for a power unit are disclosed. The fuel cell system includes a fuel cell having local areas, a current measuring device associated with at least one of the local areas to measure localized current rela... | 03/02/2010 |
| 7662494 | Fuel cell system When an operation of a fuel cell system (100) is stopped, a flow of cathode off-gas into a circulation passage (28) is stopped. A stopped state of the flow of the cathode off-gas into the circulation passage (28) is held even after a start-up of... | 02/16/2010 |
| 7655332 | System and method for optimizing fuel cell purge cycles A system for optimizing the purge cycle of a fuel cell stack responsive to the performance of the fuel cell. The system includes a controller that measures a process parameter indicative of the rate at which water is being produced in the fuel cell. If the measured ... | 02/02/2010 |
| 7655331 | Fuel cell supply including information storage device and control system The present invention is directed to a fuel cell system with various features for optimal operations of an electronic device, a battery charger or a fuel refilling device. The fuel cell system includes an information storage device associated with the fuel supply, p... | 02/02/2010 |
| 7645533 | Fuel cell power plant Water contained in cathode effluent from a cathode (1B) of the fuel cell power plant is condensed by a condenser (8) and recovered to a water tank (10). Water in the water tank (10) is supplied from a pump (17) to a humidifier (... | 01/12/2010 |
| 7632584 | Systems including replaceable fuel cell apparatus and methods of using replaceable fuel cell apparatus A system in accordance with a present invention includes a host device and a fuel cell apparatus with an information storage device. A method of operating a host device in accordance with a present invention includes the step(s) of writing data to, and/or accessing ... | 12/15/2009 |
| 7632583 | Apparatus for improving the performance of a fuel cell electric power system Current pulsing improves the performance of fuel cells in a fuel cell stack based power system. Voltage clamping limits the voltage peaks that occur after a current pulse. In a hybrid power system, an electric storage device supplies the loads during current pulsing... | 12/15/2009 |
| 7629067 | Hydrogen-producing fuel processing systems and fuel cell systems with a liquid leak detection system Liquid leak detection systems, and fuel cell systems and hydrogen-producing fuel processing systems containing the same. The liquid leak detection systems are adapted to detect liquid leaks from the fuel cell and/or fuel processing systems and to respond thereto, su... | 12/08/2009 |
| 7608353 | Method for detecting compressor surge in a fuel cell system using a mass flow meter A method for detecting compressor surge in a fuel cell system. The system includes a turbomachine compressor that delivers charge air to the cathode side of a fuel cell module. A bi-directional mass flow meter measures the airflow through the compressor, and provide... | 10/27/2009 |
| 7604884 | Fuel cell system A fuel cell generates electric power based on electrochemical reaction of reaction gases. A gas feed stopping device stops the feed of reaction gases into the fuel cell. At the time the power generation by the fuel cell is terminated, the fuel cell continues power g... | 10/20/2009 |
| 7595123 | Fuel cell system Electric power is generated by pressurizing an internal pressure of a first fuel tank (C) or a second fuel tank (C2) by pressurized air of an air pump (AP) for supplying air to an air electrode (8) of a cell (1), and supplying fuel fluid to a fu... | 09/29/2009 |
| 7588847 | Advanced controls concept for hybrid fuel cell systems A system for controlling the power output of a fuel cell stack and a battery in a hybrid fuel cell system. The system includes a power damping filter that receives a power request signal, and damps the request to reduce large changes in the power request. A battery ... | 09/15/2009 |
| 7585578 | Fuel cell system A system controller drives a gas circulator with a purge valve closed to supply hydrogen to a fuel cell stack and then increases anode operating pressure and cathode operating pressure to target operating pressures after a predetermined condition is satisfied. This ... | 09/08/2009 |
| 7582371 | Fuel cell system having fuel and water controlling means A fuel cell system includes: a dilute tank that stores an aqueous solution of liquid fuel and supplies the solution to the anode of a fuel cell; a fuel tank connected to the dilute tank via a first controlling section; a water tank connected to the dilute tank via a... | 09/01/2009 |
| 7575825 | Power supply system and control method of the same A power supply unit operation is switched depending on a load requirement. Namely, when the load requirement is smaller than a predetermined value, operation of a fuel cell system is stopped and electric power is obtained from a secondary battery during an intermitt... | 08/18/2009 |
| 7563528 | Fuel cell system and method of scavenging same A fuel cell system includes a fuel cell, an oxidant gas passage, a cathode off-gas passage, a fuel gas passage, a circulation passage, an anode off-gas passage, a fuel shutoff valve, a supply device, a humidifier and a control device. The supply device supplies a sc... | 07/21/2009 |
| 7563529 | Energy storage system A closed loop energy storage system configured with a hydrogen tank, an oxygen tank, a fuel cell stack and an electrolyzer. A heat exchanger freeze-dries the hydrogen and oxygen prior to their storage in their respective tanks. The heat exchanger also uses excess fu... | 07/21/2009 |
| 7563527 | Fuel cell-atmospheric-pressure turbine hybrid system A fuel cell-atmospheric-pressure turbine hybrid system uses the thermal energy of a cell exhaust gas discharged from an atmospheric-pressure, high-temperature fuel cell effectively, does not need any additional emergency protective device, and enables the use of lig... | 07/21/2009 |
| 7553572 | Fuel cell device and fuel cell management system A fuel cell device including a fuel cell stack unit, a fuel reform unit, a material feed unit, a cooling water supply unit, and a control unit further includes a memory section, constructed of a rewritable memory, for storing information necessary for maintenance or... | 06/30/2009 |
| 7553571 | Management system for a fuel cell and method thereof A fuel cell system includes a fuel cell, a fuel supply system, and a fuel cell control system. The fuel cell converts fuel into electrical energy. The fuel supply system is connected to the fuel cell and the fuel cell control system is coupled to the fuel cell and t... | 06/30/2009 |
| 7547481 | Fuel-circulating fuel cell system A fuel cell stack 1 in a fuel-circulating fuel cell system is supplied with fuel and an oxidizing agent to generate electricity. The fuel discharged from the fuel cell stack 1 is supplied to the fuel cell stack 1 again through a fuel-circulating... | 06/16/2009 |
| 7531258 | Fuel cell system and method for discharging reaction gas from fuel cell A fuel cell system includes: a fuel cell in which electrical power generation is performed through chemical reactions of reaction gases being supplied thereto; a discharge path through which the reaction gases are discharged; a discharge valve provided on the discha... | 05/12/2009 |
