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7632322 |
Hydrogen-producing fuel processing assemblies, heating assemblies, and methods of operating the same
Combustion-based heating assemblies and hydrogen-producing fuel processing assemblies that include at least a reforming region adapted to be heated by the heating assemblies. The heating assembly...
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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,...
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7629066 |
Fuel cell system configured to detect and control excess load use
An adaptable fuel cell system includes a stack generating electric energy through an electrochemical reaction between hydrogen and oxygen and applying the electric energy to a load. A reformer...
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7618728 |
Fuel cell system and method of controlling idle stop of the fuel cell system
A fuel cell system and an idle stop controlling method for the fuel cell system. The fuel cell system includes: a fuel gas supply means for supplying fuel gas; an oxidant gas supply means for...
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7618739 |
Battery and fluid regulating system having chassis with molded electronics
A fluid consuming battery ( 10 ) is provided with a fluid regulating system ( 50 ) for regulating fluid entry into the battery. The battery ( 10 ) includes a fluid consuming cell ( 20 ) having a...
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7618729 |
Liquid fuel direct supply fuel cell system and its operation controlling method and controller
A liquid fuel direct supply fuel cell system capable of being operated under optimal conditions. A plurality of cells each having an anode and a positive electrode disposed oppositely through an...
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7615304 |
SOFC systems to power a liquid or gas fuel pumping station
A fuel cell system for driving a pipeline transmission device. The fuel cell system may include a fuel cell stack in communication with the pipeline, a turbine engine in communication with the fuel...
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7611785 |
Generation method with fuel cell generation system and fuel cell generation system
A generation method using a fuel cell generation system, comprising the steps of: supplying a fuel gas 14 a to a fuel electrode 21 through fuel gas passages 14 at a low pressure, supplying an...
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7611784 |
Integrated switching assemblies for a fuel cell stack
A switch assembly for selectively enabling current flow through a segment of a fuel cell stack. The switch assembly includes a first plate including a first non-conductive substrate having a first...
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7608351 |
System and method for controlling cathode stoichiometry to minimize RH excursions during transients
A system and method for providing dynamic cathode stoichiometry control in a fuel cell during stack load transients to minimize relative humidity excursions. Particularly, changes in the cathode...
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7608354 |
Fuel cell system and control method of same
A gas/liquid separation device is connected to a discharge valve which can discharge fuel gas to the outside of a fuel cell system along with water accumulated in the gas/liquid separation device....
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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...
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7597976 |
Floating base load hybrid strategy for a hybrid fuel cell vehicle to increase the durability of the fuel cell system
A fuel cell system employing a floating base load hybrid strategy for reducing fast voltage transients of a FCPM. A power request signal is applied to an average power calculation processor that...
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7597975 |
Fuel cell operation to minimize RH cycles to improve durability
A fuel cell system that includes an over-arching algorithm for providing a strategy that reduces relative humidity cycling of the cathode outlet gas between wet and dry operation to extend the...
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7597977 |
Diagnostic method for fuel cell
In a diagnostic method for a fuel cell, the amount of cross leak is determined by supplying the anode of the fuel cell with a hydrogen or hydrogen-containing gas, and supplying the cathode with an...
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7588848 |
Fuel cell controller and control method
The following control is performed. During startup of a fuel cell 1 , a fuel gas is supplied to an anode 1 b of the fuel cell 1 and an oxidant gas is supplied to a cathode 1 c of the fuel...
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7588845 |
Advanced control for an electrical heatable wax thermostat in the thermal coolant loop of fuel cell systems
A control algorithm for a by-pass valve in a thermal sub-system of a fuel cell system, where the by-pass valve includes a wax element that is heated by a heating element. A stack power loss is...
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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...
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7579097 |
Fuel cell voltage feedback control system
A method and apparatus according to the present invention controls current that is supplied to a load by a fuel cell stack. A minimum voltage of a plurality of fuel cells in a fuel cell stack is...
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7576660 |
Fuel retention monitoring system for a pressurized hydrogen storage tank on a vehicle and method of use
The invention relates to a fuel retention monitoring system for a pressurized hydrogen storage tank on a vehicle. The vehicle includes a hydrogen dispensing system having a plurality of conduits...
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7569295 |
Fuel cell unit and state display control method
A fuel cell unit for supplying electric power to an electronic apparatus includes a DMFC that generates electric power using methanol as fuel. A microcomputer examines whether or not the fuel cell...
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7564211 |
Electric power generation control system and electric power generation control method for fuel cell
A power generation control system for a fuel cell, including a chargeable/dischargeable unit connected to a fuel cell, for being charged with electric power from the fuel cell and discharging...
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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...
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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...
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7544430 |
Online detection of stack crossover rate for adaptive hydrogen bleed strategy
A system and method for determining when to provide an anode exhaust gas bleed from a fuel cell stack as the fuel cell stack ages. The method determines the amount of nitrogen flowing from a...
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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...
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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...
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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...
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7527886 |
Start up of cascaded fuel cell stack
A cascaded fuel cell stack ( 9 a ) includes a plurality of groups ( 10 - 12 ) of fuel cells ( 13 ) connected electrically in series by means of conductive separator plates ( 58, 59 ) and current...
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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...
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7521138 |
Apparatus and method for hybrid power module systems
A hybrid power module suitable for use in an array of hybrid power modules comprises a fuel cell stack, an energy storage device, charger circuit operable to charge the energy storage device from...
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7519453 |
Energy distribution network
A hydrogen energy system for a facility that is disposed off-board a vehicle. The system includes a hydrogen generator disposed at the facility for generating hydrogen by water electrolysis, a...
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7517599 |
Fuel cell system
The measurement precision of a current detector of the fuel cell in a fuel cell system is improved. Where the fuel cell system 20 has not started operation, the vehicle 10 is operating under...
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7517600 |
Multiple pressure regime control to minimize RH excursions during transients
A control system for a fuel cell stack that controls the relative humidity of the cathode outlet gas during stack power transients to provide better cathode outlet gas relative humidity control by...
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7514171 |
Cathode transient humidity control in a fuel cell system
A fuel cell system that selectively causes cathode input air to by-pass a water vapor transfer (WVT) device during high to low power transients. During normal stack operation, the cathode input air...
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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...
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7485382 |
Parallel stack antifreeze system
A fuel cell stack antifreeze system that purges a plurality of fuel cell stacks connected in parallel includes a compressor that supplies pressurized cathode gas to each of the plurality of fuel...
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7482091 |
Fuel cartridge interconnect for portable fuel cells
A hybrid power supply includes a fuel cell and an interface between the fuel cell and a fuel cartridge or external battery and a switching type DC/DC boost type converter that receives energy from...
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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...
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7479342 |
Fuel cell
A fuel cell body has an anode having an anode-side separator with projections and depressions formed on its surface, a cathode, and a membrane electrode assembly disposed between the anode and the...
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7476457 |
Fuel cells system and method of controlling cells
A system which enables fuel cells to be activated at a working point of high energy conversion efficiency. A control unit calculates a required output of an inverter from an input accelerator...
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7473479 |
Current limiting system and current limiting method for fuel cells
A current limiting system for fuel cells includes a target current limit value setting device which sets a target current limit value for limiting the generated current taken out from the fuel cell...
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7473480 |
Low voltage compressor operation for a fuel cell power system
An apparatus and method for operating a fuel cell power system utilizing a low voltage power source and system power to power an airmover. The fuel cell power system uses a low voltage power source...
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7468215 |
Self-starting fuel cell assembly
A self-starting fuel cell assembly and methods of starting fuel cells are disclosed. In at least certain examples, the fuel cell assembly can be configured to supply voltage to a fuel source, an...
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7465507 |
Portable fuel cell system with releasable and rechargeable batteries
A fuel cell power system has a fuel cell capable of generating electrical power, a battery holder releasably mounting at least one rechargeable battery, and a power controller which receives the...
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7465505 |
Power supply system, fuel pack constituting the system, and device driven by power generator and power supply system
A fuel pack with a space for storing a fuel is provided which includes a case, wherein the case includes a feed port for exhausting the fuel to outside of the fuel pack, and at least a portion of...
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7461707 |
Electric horizontal directional drilling machine system
An electric horizontal directional drilling machine. An electric horizontal directional drilling machine is powered by an electric power assembly. The power assembly is made up of a fuel cell and...
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7456517 |
Methods and apparatus for controlled solid oxide fuel cell (SOFC)/turbine hybrid power generation
A method for operating a pressurized solid oxide fuel cell/turbine (SOFC/turbine) hybrid power generation system in which the hybrid power generation system includes an SOFC generator and a turbine...
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7452393 |
Installation for hydrogen production and methods for using same
An installation and process for producing hydrogen, which includes a purification unit for purifying a hydrogen-rich synthesis gas and for producing hydrogen and a waste gas, along with the...
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7452391 |
Feedforward control processes for variable output hydrogen generators
Hydrogen generators and integrated hydrogen generator/fuel cells systems are operated by determining the condition of the hydrogen generator and the condition of the fuel to the hydrogen generator...
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