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| Number | Title | Issue Date |
| 8048548 | Electrocatalyst for alcohol oxidation at fuel cell anodes In some embodiments a ternary electrocatalyst is provided. The electrocatalyst can be used in an anode for oxidizing alcohol in a fuel cell. In some embodiments, the ternary electrocatalyst may include a noble metal particle having a surface decorated with clusters ... | 11/01/2011 |
| 8043736 | Power generator having multiple layers of fuel cells A power generator has a hydrogen source, such as a hydrogen producing fuel and a fuel cell having a proton exchange membrane separating the hydrogen producing fuel from ambient. A valve is disposed between the fuel cell and ambient such that water is controllably pr... | 10/25/2011 |
| 7939214 | Electronic equipment provided with voltage check unit Electronic equipment includes a fuel cell for supplying electrical power. A power source switch controls supply of power to the electronic equipment. A voltage check unit compares a voltage of the fuel cell with a reference voltage and generates a voltage depleted s... | 05/10/2011 |
| 7867642 | Fuel cell start optimization A method of starting a fuel cell stack in subzero conditions that minimizes start times while avoiding cell reversal by using an iterative model to determine the optimal current density time profile for startup. ... | 01/11/2011 |
| 7858214 | Method and apparatus for light internal reforming in a solid oxide fuel cell system In an SOFC stack system, wherein a CPOx reformer supplies reformate to the stack, a portion of the anode tail gas is recycled directly into the anode inlet of the stack, such that the fuel reaching the anodes is a mixture of fresh reformate and recycled anode tail g... | 12/28/2010 |
| 7846569 | Methods for operating a fuel cell system under reduced load conditions Methods for operating a fuel cell system under reduced load conditions. The fuel cell system includes a control system for regulating the power produced by the fuel cell system. The fuel cell system further includes a fuel cell stack adapted to produce electrical po... | 12/07/2010 |
| 7811689 | Biological fuel cell and methods A fuel cell has an anode and a cathode with anode enzyme disposed on the anode and cathode enzyme is disposed on the cathode. The anode is configured and arranged to electrooxidize an anode reductant in the presence of the anode enzyme. Likewise, the cathode is conf... | 10/12/2010 |
| 7790303 | Storage of fuel cell energy during startup and shutdown or other power transitions During fuel cell startup and shutdown or other power reduction transitions of a fuel cell power plant, the excess electric energy generated by consumption of reactants is extracted by a storage control (200) in response to a controller (185) as current... | 09/07/2010 |
| 7781115 | Recuperated atmosphere SOFC/gas turbine hybrid cycle A method of operating an atmospheric-pressure solid oxide fuel cell generator (6) in combination with a gas turbine comprising a compressor (1) and expander (2) where an inlet oxidant (20) is passed through the compressor (1) and e... | 08/24/2010 |
| 7771854 | Fuel cell system and method of detecting failure in a fuel gas channel of fuel cell system When an ignition switch is turned off, a hydrogen supply valve is closed. Operation of a compressor continues, and an air supply valve and an air discharge valve are opened to supply the compressed air into a fuel cell through a hydrogen supply port. The scavenging ... | 08/10/2010 |
| 7767325 | Method and apparatus for the investigation of a fuel cell system A method and an apparatus for the investigation of a fuel cell system comprising at least one fuel cell having an anode side to which a fuel is supplied in operation and a cathode side which is separated from the anode side by a membrane and to which an oxidizing ag... | 08/03/2010 |
| 7767327 | Method of activating vehicle fuel cell The method of activating a vehicle fuel cell for ensuring maximum performance, improves performance of a polymer electrolyte membrane fuel cell, reduces a hydrogen usage, and has stable performance after manufactured. The method includes: placing a fuel cell in an a... | 08/03/2010 |
| 7767326 | Water controller system having stable structure for direct methanol fuel cell Disclosed herein is a water controller system constructed such that water generated from a cathode of a direct methanol fuel cell system and carbon dioxide and an unreacted methanol solution generated from an anode of the direct methanol fuel cell system are introdu... | 08/03/2010 |
| 7754361 | Fuel cell systems with maintenance hydration by displacement of primary power Fuel cell systems that perform maintenance hydration by supplying power to satisfy at least part of an applied load from an energy-consuming assembly while a primary power source is in electrical communication with and available to supply power to the energy-consumi... | 07/13/2010 |
| 7749623 | Method of controlling fuel cell system A fuel cell is obtained, in which oxidation degradation of a catalyst in the cathode can be prevented even if a large volume of air instantaneously penetrates into the cell, and the fuel-cell characteristics also do not deteriorate even though starting-up, shutting-... | 07/06/2010 |
| 7749624 | Method for providing back-pressure for a fuel cell stack A method for controlling the pressure within a fuel cell stack to control the stack relative humidity. In one embodiment, a two-position valve receiving the cathode exhaust is switchable between a fully open and a fully closed position, where the valve is opened whe... | 07/06/2010 |
| 7722970 | Systems and methods for charging a fuel cell vehicle Disclosed are systems and method for charging a fuel cell vehicle comprising a fuel cell, a rotating load, an energy storage, a contactor, a DC-DC converter, and a control unit. When charging of the energy storage is performed, the DC-DC converter connected to the e... | 05/25/2010 |
| 7713642 | System and method for fuel cell operation with in-situ reformer regeneration A system and method for operating a fuel cell, including reacting a fuel with an oxidant within the fuel cell to produce electricity and reaction products comprising steam. The fuel is fed through the fuel cell, wherein a concentration of the steam increases in the ... | 05/11/2010 |
| 7709119 | Method for operating fuel cell In a method for operating a fuel cell including an electrolyte membrane sandwiched by a fuel electrode and an oxidizing agent electrode, the method includes a hydrogen feedback process either before starting operation of the fuel cell or after stopping operation of ... | 05/04/2010 |
| 7709120 | Method to maximize fuel cell stack shorting resistance A method of producing a fuel cell stack is disclosed, the method including the steps of compressing the fuel cell stack at a first pressure and compressing the fuel cell stack at a second pressure higher than the first pressure, wherein a shorting resistance of fuel... | 05/04/2010 |
| 7709118 | Recuperated atmospheric SOFC/gas turbine hybrid cycle A method of operating an atmospheric-pressure solid oxide fuel cell generator (6) in combination with a gas turbine comprising a compressor (1) and expander (2) where an inlet oxidant (20) is passed through the compressor (1) and e... | 05/04/2010 |
| 7704616 | Method for purging fuel cell system A method for purging a fuel cell system comprises detecting a signal for stopping an operation of a fuel cell system, cutting off an electricity output of the fuel cell system, driving a steam generator of a fuel supply unit of the fuel cell system for a certain tim... | 04/27/2010 |
| 7700210 | Increasing thermal dissipation of fuel cell stacks under partial electrical load A method of operating a high temperature fuel cell system containing a plurality of fuel cell stacks includes operating one or more of the plurality of fuel cell stacks at a first output power while operating another one or more of the plurality of the fuel cell sta... | 04/20/2010 |
| 7700209 | Power generation control system for fuel cell A power generation control system which includes: a fuel cell (201); a target power provider (101) for the fuel cell (201); a operation status monitoring system (102) for monitoring output power from the fuel cell (201), in which t... | 04/20/2010 |
| 7695836 | Method for initial activation of polymer electrolyte fuel cell A method for an initial activation of a polymer electrolyte fuel cell includes: humidifying a fuel cell stack; performing a small-current driving operation for applying a small current to the humidified fuel cell stack; and performing an activating operation by repe... | 04/13/2010 |
| 7695837 | Fuel cell system A fuel cell system includes a fuel cell having a fuel gas flow path and an oxidant gas flow path; a compressor for supplying humidified air to the oxidant gas flow path; a back-pressure regulating valve for controlling pressure of humidified air in the oxidant gas f... | 04/13/2010 |
| 7691506 | Fuel cell stack A fuel cell stack which comprises a plurality of unit fuel cells laminated via separators, and is connected to external resistors each allowing a feeble current to flow to each unit fuel cell, whereby such problems as an open-circuit voltage generation and corrosion... | 04/06/2010 |
| 7691507 | Combination fuel cell and ion pump, and methods and infrastructure systems employing same A combination fuel cell and hydrogen or oxygen pump includes an electrochemical cell comprising an anode inlet for receiving fuel, an anode outlet for exhausting fuel, a cathode inlet for receiving oxidant, a cathode outlet for exhausting oxidant, and first and seco... | 04/06/2010 |
| 7691505 | Fuel cell system This cathode-side humidification tank 1038 also functions as a coolant tank. The water in the cathode-side humidification tank 1038 cools the fuel cell 1030 and returns to the cathode-side humidification tank 1038. In the foregoing situat... | 04/06/2010 |
| 7687165 | Solid polymer electrolyte fuel cell assembly, fuel cell stack, and method of operating cell assembly A cell assembly is formed by stacking a first unit cell and a second unit cell to each other. The first unit cell includes a first unified body, and the second unit cell includes a second unified body. In the cell assembly, the first and second unit cells have struc... | 03/30/2010 |
| 7687163 | Soft start fuel cell control strategy A method of operating an electrochemical conversion assembly is provided. According to the method, an assembly warm-up operation is executed by increasing the temperature TSTACK of the membrane electrode assembly. Next, stoichiometry-based control of the ... | 03/30/2010 |
| 7687164 | On-line system identification and control of fuel cell humidification via HFR measurements A fuel cell system is provided, including an HFR measurement device in electrical communication with a fuel cell stack. The HFR measurement is used online to measure an HFR of the fuel cell stack suitable for calculation of a d(HFR)/d(RH) ratio. A humidity regulator... | 03/30/2010 |
| 7687162 | Purging method of fuel cell system A purging apparatus for a fuel cell system according to the present invention comprises a steam supply pass 18 and an air supply pass 19. A purging method for the fuel cell system according to the present invention comprises, at a time of causing a fue... | 03/30/2010 |
| 7682716 | Method for operating fuel cell and fuel cell system A method for operating a direct methanol fuel cell is provided. The fuel cell includes a fuel cell main body having a fuel electrode and an air electrode disposed in opposing positions on either side of an electrolyte film. In this method, an aqueous methanol soluti... | 03/23/2010 |
| 7682717 | Fuel cell system with cooling and method of controlling the same A fuel cell system includes: a fuel cell that generates an electric power and heat by a reaction of a reaction gas; a heat exchanger; a coolant circuit for a coolant between the fuel cell and the heat exchanger; a coolant circulating pump for circulating the coolant... | 03/23/2010 |
| 7682715 | Vehicle equipped with fuel cell system A vehicle equipped with a fuel cell system is disclosed including a vehicle body having a floor, and a fuel cell system disposed below the floor and including a fuel cell stack and a water supply device connected to a water storage tank. The water supply device incl... | 03/23/2010 |
| 7678478 | Fuel cell assembly having long life characteristics A fuel cell assembly (20) has a plurality of characteristics that extend the useful life of the assembly. In one example, flow field layers are non-porous and hydrophobic such that they have an acid absorption rate of less than about 0.10 mg/khr-cm2 | 03/16/2010 |
| 7678477 | Method of operating a fuel cell stack A method of operating a fuel cell stack including disconnecting the primary electrical device and purging gas in the cathode reactant gas flow field by flowing air into the cathode reactant gas flow field. Thereafter, the gas in the cathode reactant flow field is pu... | 03/16/2010 |
| 7674537 | Direct methanol type fuel cell and method of preventing elution of its fuel pole, quality control method and operation method Elution of a fuel electrode material into a fuel in a direct methanol fuel cell is monitored. The elution arises resulting from elution of a perfluorosulfonic acid polymer in the fuel electrode into the fuel in a high-concentration fuel equal to or more than 2 M or ... | 03/09/2010 |
| 7666532 | Fuel cell system and method of starting fuel cell system A reaction gas is supplied to a cathode side of a fuel cell at a flow rate higher than that for a usual operation of the fuel cell to thaw the fuel cell system at startup in a freezing state of the system when the system has experienced a temperature lower than an o... | 02/23/2010 |
