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| Number | Title | Issue Date |
| 7537847 | Fuel cell system and method for operating same A fuel cell system of the present invention comprises a fuel cell which is supplied with a fuel gas and an oxidizing gas to generate electricity, a fuel gas supply interrupting device for interrupting the fuel gas supply to an anode inlet of the fuel cell, and an an... | 05/26/2009 |
| 7537848 | Method for model based exhaust mixing control in a fuel cell application A system and method for controlling a bleed valve and a compressor in a fuel cell system during an anode exhaust gas bleed so as to maintain the concentration of hydrogen within a mixed cathode exhaust gas and anode gas below a predetermined percentage. The system u... | 05/26/2009 |
| 7534510 | Fuel compositions Fuel compositions, methods of making the compositions, and fuel cell systems including a fuel composition are disclosed. In some embodiments, a fuel composition includes a polymer, and a fuel such as methanol, wherein the composition has a hardness of at least about... | 05/19/2009 |
| 7534511 | Thermal control of fuel cell for improved cold start Improvements in startup time for an electrochemical fuel cell system from freezing and sub-freezing temperatures are obtained by utilizing an insulated fuel cell stack in combination with an thermal control subsystem. Temperature of the insulated electrochemical fue... | 05/19/2009 |
| 7531253 | Method for monitoring the operational state of a fuel cell stack The invention relates to a method for monitoring the operational state of a fuel cell stack comprising a plurality of series-connected single cells. In order to significantly reduce measuring costs and apparatus a low-frequency current or voltage signal is impressed... | 05/12/2009 |
| 7527882 | Method for detecting undersupply of fuel gas and method for controlling fuel cell A reference electrode is provided adjacent to an anode of a membrane electrode assembly. The potential difference between the reference electrode and the anode is measured by a control unit. The control unit compares the measured value and a map of the anode potenti... | 05/05/2009 |
| 7524571 | Method for controlling nitrogen fraction in a fuel cell A correlation between a variance in a voltage output of fuel cell(s) of a fuel cell stack and a level of nitrogen in the anode side of the fuel cell stack provides an indirect indication of the nitrogen level in the anode side. Base on this correlation, the variance... | 04/28/2009 |
| 7514165 | Fuel cell system fluid recovery A system and method are provided for fluid collection within a fuel cell system. The fluid collection device includes a fluid collection container which has a gas inlet, a gas outlet, at least one fluid inlet, and a fluid outlet. The at least one fluid inlet allows ... | 04/07/2009 |
| 7514166 | Reduction of SOFC anodes to extend stack lifetime One embodiment of the invention provides a method of operating a solid oxide fuel cell, including providing a solid oxide fuel cell comprising an anode electrode containing nickel, and electrochemically reducing an anode side of the fuel cell. Another embodiment of ... | 04/07/2009 |
| 7507488 | System and method for drying a fuel cell stack at system shutdown A system and method for drying a fuel cell stack after stack shutdown. In one embodiment, a cooling fluid is pumped through the fuel cell stack after the system is shutdown to use the heat still available in the cooling fluid immediately after shutdown to provide th... | 03/24/2009 |
| 7494730 | Apparatus for cooling fuel cell An apparatus for cooling a fuel cell, which generates power by supplying air and a fuel gas, in which a cooling liquid is circulated between the fuel cell and a heat exchanger is disclosed. The cooling apparatus of the present invention separates the gas introduced ... | 02/24/2009 |
| 7488547 | Fuel cell, components and systems Alkali fuel cells, systems, and related methods, and flow-through, high-surface area electrodes, are employed to generate electricity. The electrode can include a porous substrate comprising a first side for fluid ingress, a second side for fluid egress, and a plura... | 02/10/2009 |
| 7482074 | Fuel cell system, mobile unit equipped with the system, and control method for the fuel cell system A fuel cell system FC replenishes a fuel cell stack with air or hydrogen by temporarily driving a compressor or a low-pressure valve even during an intermittent operation mode. If air is supplied for replenishment, the amount of air remaining in an air supply system... | 01/27/2009 |
| 7479334 | Method for operating vehicle-mounted fuel cell stack Temperature of power generating cells is measured, and, if the measured temperature is lower than a preset standard operating temperature, control is performed for zeroing an allocated amount of cooling air via an air allocation mechanism. During a startup period, c... | 01/20/2009 |
| 7479333 | Fuel cell stack with multiple groups of cells and flow passes There is described a method of flowing reactants through a fuel cell stack having a plurality of fuel cells, the method comprising: dividing the stack into a plurality of groups, each of the groups connected together electrically in series; selecting a number of the... | 01/20/2009 |
| 7479335 | Anode humidification A technique includes providing fuel and oxidant flows to a fuel cell. The technique includes humidifying the anode of the fuel cell, including saturating the oxidant flow and maintaining a temperature of the oxidant flow above a temperature of the fuel cell such tha... | 01/20/2009 |
| 7470478 | Direct methanol feed fuel cell and system Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially tr... | 12/30/2008 |
| 7470479 | Method and apparatus for warming-up fuel cell and fuel cell vehicle A method for warming up a fuel cell system comprising; a fuel cell which generates electric current due to an electrochemical reaction between hydrogen and oxygen, and which supplies the electric current to a load, an air supply pipe for supplying air to the fuel ce... | 12/30/2008 |
| 7462413 | Method of operating a fuel cell system A method and apparatus for the operation of a fuel cell system to avoid the freezing of water resident in one or more fuel cells during periods of system inactivity. Each fuel cell includes at least an anode, a cathode and a membrane configured to establish electrol... | 12/09/2008 |
| 7455920 | Fuel cell system The fuel cell system comprises a fuel cell (1) that has an electrolyte membrane and generates power by using a fuel gas and an oxidizing agent gas; a storage device (51) for water that humidifies the fuel cell; and a controller (100). The contro... | 11/25/2008 |
| 7452618 | Fuel cell cogeneration system A fuel cell cogeneration system includes a fuel cell, a cooling water heat exchanger provided on a cooling water pathway, a stored hot water pathway through which stored hot water that exchanges heat with cooling water flows, a stored hot water tank, a stored hot wa... | 11/18/2008 |
| 7449258 | Integrated fuel cell stack thermostat A fuel cell system includes a fuel cell stack and a thermostat. The thermostat is mounted to the fuel cell stack to regulate a flow of coolant. ... | 11/11/2008 |
| 7442217 | Integrated fuel processor for rapid start and operational control A fuel processor for rapid start and operational control. The fuel processor includes a reformer, a shift reactor, and a preferential oxidation reactor for deriving hydrogen for use in creating electricity in a plurality of H2—O2 fuel cells. ... | 10/28/2008 |
| 7442452 | Fuel cell system and gas leak detection method When a command for stopping electric generation by a fuel cell is issued, shutoff valves are closed (at time t1), and then a time-dependent change in pressure (P) in a closed passage area including the fuel cell is detected. A pressure change speed (dP1 | 10/28/2008 |
| 7442457 | Fuel cell system with compressor and also a method for operating such a fuel cell system A fuel cell system comprising a plurality of fuel cells combined together to form a fuel cell stack, with the fuel cell stack having an anode side with an inlet for a fuel and an outlet for non-consumed fuel and exhaust gases arising at the anode side as well as a c... | 10/28/2008 |
| 7442455 | Apparatus and method for protecting fuel cell A memory unit stores maps of predetermined determination threshold values for detection values detected by a hydrogen sensor according to an operating state of a fuel cell such as a difference in pressure between reaction gases at an anode and a cathode, supply pres... | 10/28/2008 |
| 7442454 | Fuel cell system A fuel cell is protected from performance degradation and damage by determining when an ion exchange resin filter needs replacement before the occurrence of an increase in the electric conductivity of water used in the fuel cell system. The replacement time of the i... | 10/28/2008 |
| 7442453 | Decontamination procedure for a fuel cell power plant A decontamination procedure for a fuel cell power plant (10) includes operating the plant to produce electrical power for an operating period, and then terminating operation of the plant (10) for a decontamination period, and then, whenever optimal ele... | 10/28/2008 |
| 7442458 | Fuel cell system and activation system thereof A fuel cell system is equipped with a fuel cell for generating power by an electrochemical reaction of a fuel gas and an oxidizer gas, a fuel gas supply mechanism for supplying the fuel gas to the fuel cell, a supply amount adjustment mechanism for adjusting a suppl... | 10/28/2008 |
| 7443133 | Fuel cell management system and audio system provided with the management system A management information display unit that is able to form management information for managing the power supply state of fuel cells and displays the management information while allowing the management information to be identified as to which electronic device perta... | 10/28/2008 |
| 7438986 | Fuel cell system with improved humidification system A method for operating a fuel cell power plant. The fuel cell can include a reactant passage (22) with an upstream portion and a downstream portion for providing reactant to an electrode (16, 18), at least one liquid passage (24), and a plate ( | 10/21/2008 |
| 7435490 | Oxygen getters for anode protection in a solid-oxide fuel cell stack In a fuel cell assembly, nickel-based anodes are readily oxidized when exposed to oxygen as may happen through atmospheric invasion of the assembly during cool-down following shutdown of the assembly. Repeated anode oxidation and reduction can be destructive of the ... | 10/14/2008 |
| 7435493 | Fuel cell and method for operating the same In a cell stack of fuel cells according to the present invention, an output power density is measured at each of an upstream-side electricity generating section, which is located at an upstream-side of flow of fuel, and a downstream-side electricity generating secti... | 10/14/2008 |
| 7432002 | Method for regeneration of performance in a fuel cell A process for improved performance in at least one fuel cell, having a loss in power output of at least 5% of an initial power output, wherein the fuel cell comprises a cathode, an anode, an anode chamber, a cathode chamber, a fuel comprising an anolyte that flows t... | 10/07/2008 |
| 7431238 | Arrangement and method for the generation of water on board an aircraft An arrangement and a method are proposed for the generation of water on board an aircraft with the use of one or more fuel cells, whereby low-temperature fuel cells are provided as fuel cells. It is proposed that several single-cell or few-cell fuel cells may... | 10/07/2008 |
| 7427451 | Fuel cell system A fuel cell system has a fuel cell (1) performing power generation as a result of reactions in supplied gases, a humidifying device (34) for humidifying at least one supplied gas by using water from water tank (31), and a coolant temperature reg... | 09/23/2008 |
| 7427448 | Portable device, case for portable device, and fuel cell structure A fuel cell is disposed inside a camera housing in the vicinity of a front panel, an upper panel, and a side panel in parallel with the respective panels. The invention provides broader cell area and adequate power can be supplied reliably. ... | 09/23/2008 |
| 7425379 | Passive electrode blanketing in a fuel cell A fuel cell module is provided having a fuel cell stack, a parasitic load connectable across the electrodes, and a reactant reservoir for storing an amount of a first reactant such as hydrogen. When the fuel cell module is shutdown, the stored amount of the first re... | 09/16/2008 |
| 7425380 | Fuel cell system and related method A fuel cell system and related method are disclosed having a system controller 37 that executes enthalpy calculation based on status signals, related to anode off-gas and cathode off-gas, detected by a temperature detector 29, a pressure detector 30... | 09/16/2008 |
| 7419734 | Method and apparatus for fuel cell systems An array of fuel cell systems are electrically couplable in series and/or parallel combinations to provide a variety of output powers, output current and/or output voltages. The fuel cell systems are “hot swappable” and redundant fuel cell systems may automatica... | 09/02/2008 |
