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UTC Fuel Cells, LLC Patents
Assignee:
UTC Fuel Cells, LLC
Address:
South Windsor, CT
No. of patents:
161
Patents:


1 2 3 4










Patent Number Title Of Patent Date Issued
RE39710 System for providing assured power to a critical load July 3, 2007
A power system (8) is provided for economically supplying uninterrupted electrical power to one or more critical loads (14). One or more fuel cell power plants (18) provide one substantially continuous source of power, and a utility grid (10) provides another source of power. The fuel
RE39348 Method of using a water transport plate October 17, 2006
A water transport plate is provided with optimized physical characteristics to greatly improve fuel cell operation. In a preferred method of manufacturing, graphite powder, reinforcing fibers, cellulosic fibers, and a thermosetting resin are mixed with a liquid to form a slurry and s
D492650 Fuel cell enclosure July 6, 2004
8206490 Contaminant separator and isolation loop for a fuel reactant stream for a fuel cell June 26, 2012
A separator scrubber (58) and isolation loop (78) decontaminates a fuel reactant stream of a fuel cell (12). Water passes over surfaces of an ammonia dissolving means (61) within the scrubber (58) while the fuel reactant stream simultaneously passes over the surfaces to remove contam
8057847 Method for preparing membranes and membrane electrode assemblies with hydrogen peroxide decompos November 15, 2011
A method for making a membrane electrode assembly includes the steps of providing a membrane electrode assembly including an anode including a hydrogen oxidation catalyst; a cathode; a membrane disposed between the anode and the cathode; and depositing a peroxide decomposition catalyst
7977004 Compliant seals for solid oxide fuel cell stack July 12, 2011
A seal assembly for a solid oxide fuel cell stack, includes at least two fuel cell stack components having opposed surfaces and a seal member disposed between the surfaces, wherein the seal member is a compliant seal member that is mechanically compliant in both in-plane and out-of-p
7442453 Decontamination procedure for a fuel cell power plant October 28, 2008
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 electrical production of a plant fuel
7399547 Fuel and air flow control in a multi-stack fuel cell power plant July 15, 2008
A fuel cell power plant includes a plurality of fuel cell stacks which are operatively associated with each other so that both the air stream and fuel stream for the stacks are shared by each of the stacks in the power plant. The air and fuel streams are fed into an initial stack stage i
7282290 Freeze tolerant fuel cell power plant with a direct contact heat exchanger October 16, 2007
A power plant (10) includes at least one fuel cell (12), a coolant loop (18) including a freeze tolerant accumulator (22) for storing and separating a water immiscible fluid and water coolant, a direct contact heat exchanger (56) for mixing the water immiscible fluid and the water co
7282285 Method and apparatus for the operation of a cell stack assembly during subfreezing temperatures October 16, 2007
A cell stack assembly (102) coolant system comprises a coolant exhaust conduit (110) in fluid communication with a coolant exhaust manifold (108) and a coolant pump (112). A coolant inlet conduit (120) enables transportation of the coolant to the coolant inlet manifold. The coolant s
7201992 Fuel cell with passive water balance April 10, 2007
A fuel cell includes a membrane electrode assembly (46) having a first reactant flow field (80) secured adjacent a first or second surface (48, 50) of the assembly (46) for directing flow of a first reactant adjacent the first or second surface of the assembly (46). The first reactant fl
7195742 Preferential oxidation reactor and process March 27, 2007
An apparatus for preferential oxidation of carbon monoxide in a reformate flow includes a reactor defining a flow path for a reformate flow; at least one catalyst bed disposed along the flow path; and a distributor for distributing oxygen from an oxygen source to the at least one cat
7179557 Direct antifreeze cooled fuel cell power plant with passive water management February 20, 2007
The plant (60) includes at least one fuel cell (10, 62) having a wetproofed anode support (20) and a cathode support (24) for directing reactant streams adjacent catalysts (14, 16). A porous anode cooler plate (26) has its fuel channels (28A, 28B, 28C, 28D) secured adjacent the anode
7172647 Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell pow February 6, 2007
A liquid-gas separator assembly is used in separating gas bubbles from a liquid coolant. The assembly includes a cylindrical housing containing a central tube which is surrounded by an annular chamber. The annular chamber is defined by the outer surface of the central tube and the inner
7166263 Ceria-based mixed-metal oxide structure, including method of making and use January 23, 2007
A homogeneous ceria-based mixed-metal oxide, useful as a catalyst support, a co-catalyst and/or a getter has a relatively large surface area per weight, typically exceeding 150 m.sup.2/g, a structure of nanocrystallites having diameters of less than 4 nm, and including pores larger t
7150929 Fuel cell coolers with inverse flow and condensation zone December 19, 2006
A fuel cell system having a fuel cell stack (9) employing a phosphoric acid or other electrolyte, includes a non-reactive zone (11) in each of a group of fuel cells between corresponding coolant plates (55), the coolant entering the coolant plates in an area adjacent to the non-react
7147945 System for determining a gas composition within a shut down fuel cell power plant and method of December 12, 2006
The invention is a system (10) and method for determining a gas composition within a fuel cell (12) of a shut down fuel cell power plant. The system (10) includes at least one fuel cell (12), a sensor circuit (86) secured in electrical connection with the fuel cell (12), wherein the
7144649 Interconnect for solid oxide fuel cells December 5, 2006
A fuel cell stack includes a plurality of fuel cells each having an anode layer, an electrolyte layer, and a cathode layer, the fuel cells each having a first effective thermal expansion coefficient; a plurality of bipolar plates positioned between adjacent fuel cells having an anode
7141324 Hydrogen passivation shut down system for a fuel cell power plant November 28, 2006
The invention is a hydrogen passivation shut down system for a fuel cell power plant (10). An anode flow path (24) is in fluid communication with an anode catalyst (14) for directing hydrogen fuel to flow adjacent to the anode catalyst (14), and a cathode flow path (38) is in fluid c
7135247 Easily isolated, oversized fuel cell stack cooler plates November 14, 2006
A plurality of cooler plates (9) are disposed between fuel cells (8) in a stack (7) and have protrusions (12, 13) which include coolant inlet and outlet channels (15). The protrusions are surrounded by an elastomeric sealant material (35, 36) which forms a seal with the manifold structur
7128992 Dual pump fuel cell temperature management system October 31, 2006
The outflow of coolers or water transport plates of a fuel cell stack (15) is fed to the inlet of a gas/liquid separator (12), the liquid output of which is connected through a primary pump (11a) to a liquid accumulator (21). A secondary pump (44) connected to the liquid output (20) of t
7128768 Hydrogen generator for hydrogen desulfurization of hydrocarbon feeds October 31, 2006
A hydrogen-rich reformate gas generator (36), such as a mini-CPO, POX, ATR or other hydrogen generator provides warm, dry, hydrogen-rich reformate gas to a hydrogen desulfurizer (17) which provides desulfurized feedstock gas to a major reformer (14) (such as a CPO) which, after processin
7118820 Method and apparatus for humidification control of an energy recovery device in a fuel cell powe October 10, 2006
An arrangement is provided in a fuel cell power plant (10) for dispensing (58 74, 60, 64) a liquid medium, such as water (66), into a process oxidant (air) stream (53) that flows through one gas channel (42) in an energy recovery device (ERD) (32). An exhaust gas stream (48) containing
7118819 Coolant mixture separator assembly for use in a polymer electrolyte membrane (PEM) fuel cell pow October 10, 2006
A liquid-gas separator assembly is used in separating gas bubbles from a liquid coolant which liquid coolant is used in a polymer electrolyte membrane (PEM) fuel cell power plant. The assembly includes a cylindrical housing containing a central tube which is surrounded by an annular
7112386 Membrane electrode assemblies with hydrogen peroxide decomposition catalyst September 26, 2006
A membrane electrode assembly includes an anode including a hydrogen oxidation catalyst; a cathode; a membrane disposed between the anode and the cathode; and a peroxide decomposition catalyst positioned in at least one position selected from the group consisting of the anode, the ca
7112384 Fuel cell manifold seal with rigid inner layer September 26, 2006
A multi-layer seal system for a manifold (10) of a proton exchange membrane fuel cell includes a silicone rubber filler layer (22) between endplates (9) to compensate for the uneven edges of cell elements, an elastomer gasket (15) disposed within a groove (24) in the contact surfaces
7112379 Vacuum assisted startup of a fuel cell at sub-freezing temperature September 26, 2006
A vehicle (150) includes a fuel cell stack (151) started below freezing, by connection (158) to the vehicle propulsion system (159) within a few seconds of starting the flow of fuel (179) and oxidant (173), or when open circuit voltage (155, 156) is detected. The fuel in excess of st
7108937 Reducing PEM fuel cell hard freeze cycles September 19, 2006
The reactant gas manifolds (12 15) of a PEM fuel cell are modified to provide insulated manifolds (14a) having inner and outer walls (30, 31) closed off by a peripheral wall (35) to provide a chamber (36) which may be filled with a vacuum, a low thermal conductivity gas, a VIP (59) or a
7108929 Fuel and air flow control in a multi-stack fuel cell power plant September 19, 2006
A fuel cell power plant includes a plurality of fuel cell stacks which are operatively associated with each other so that both the air stream and fuel stream for the stacks are shared by each of the stacks in the power plant. The air and fuel streams are fed into an initial stack stage i
7100376 Fuel cell in combined heat and electric power system September 5, 2006
A fuel cell system having a fuel cell stack (9) employs a group of fuel cells between corresponding cooler plates (55). The system utilizes single phase coolant, the outflow of the coolant plates (55) being divided into a flow (78) just sufficient to provide adequate steam (68, 79) t
7090940 Freeze tolerant fuel cell power plant with a direct contact heat exchanger August 15, 2006
A freeze tolerant fuel cell power plant (10) includes at least one fuel cell (12), a coolant loop (18) including a freeze tolerant accumulator (22) for storing and separating a water immiscible fluid and water coolant, a direct contact heat exchanger (56) for mixing the water immisci
7087330 Storing water in substrates for frozen, boot-strap start of fuel cells August 8, 2006
Fuel cells (16) include a proton exchange membrane (18) with cathode catalyst (24) and anode catalyst (20) on opposing surfaces thereof. An anode support plate (21) includes a hydrophilic substrate (22) and a cathode support plate (25) includes a hydrophilic substrate (26) and a cont
7087329 Electric storage augmentation of fuel cell system transient response August 8, 2006
A fuel cell stack (7) with output lines (8, 9) has a bank of supercapacitors (10) or batteries (10a) connected across the output lines, either directly or through a DC/DC converter (22). The fuel cell stack receives fuel either from a reformer (13) or a source (13a) of hydrogen. Powe
7081313 Cathode-to-cathode fuel cell stacks July 25, 2006
A plurality of fuel cell stacks (8, 8a, 9, 9a) have their cathode ends (11, 12) contiguous with either a common current collector (15a 15d) or respective current collectors (15a, 15b) which may be separated by electrical isolation (27a, 27b). The cathode-to-cathode relationship prote
7078118 Performance enhancing break-in method for a PEM fuel cell July 18, 2006
A performance enhancing break-in method for a proton exchange membrane ("PEM") fuel cell (12) includes cycling potentials of an anode electrode (14) and a cathode electrode (16) from a first potential to a second potential and back to the first potential, and repeating the cycling for
7067214 PEM fuel cell stack assembly with isolated internal coolant manifold June 27, 2006
A PEM fuel cell assembly includes cooler plates (10) with internal coolant manifolds (25) isolated from the cell stack assembly by an isolation gap (28) to minimize the risk of contamination of the cells by antifreeze. The internal coolant manifolds are formed by seal assemblies (24), ea
7067209 High temperature reactant recycling for PEM fuel cell humidification June 27, 2006
A fuel cell stack has an air inlet manifold (21), an air turnaround manifold (22) and an air exit manifold (23); a coolant inlet is adjacent said air exit manifold; a fuel inlet manifold (16) is connected through a turnaround manifold (17) to a fuel exit manifold (18) remote from said
7063907 Passive water management system for a fuel cell power plant June 20, 2006
The invention includes an anode fuel flow field (100) adjacent a fuel cell (12) electrolyte (18) that defines a fuel path (102) between a fuel inlet (108) and a fuel outlet (110) and includes a cooler plate (118) in heat exchange relationship with the anode fuel flow field (100) that def
7061139 System for providing assured power to a critical load June 13, 2006
A first AC power source comprising a power plant (18), and a second power source, typically grid (10), are normally connected via a high speed isolation switching means (19) to provide sufficient AC power to a critical load (14). The power plant (18) comprises a power generating mean
7056609 System and method for starting a fuel cell stack assembly at sub-freezing temperature June 6, 2006
A method for operating a fuel cell stack assembly having a plurality of fuel cells arranged in a stack to define opposed end fuel cells, wherein the plurality of fuel cells include intermediate fuel cells between the opposed end fuel cells, including feeding fuel and oxidant to the i
7049018 Method of operating a fuel cell system under freezing conditions May 23, 2006
A fuel cell system having a stack of proton exchange membrane fuel cells is operated in sub-freezing temperatures by draining any liquid water from the fuel cell water flow passages upon or after the previous shut-down of the stack before freezing can occur, and, thereafter a) starti
7041408 Varied fuel cell oxidant flow channel depth resulting in fewer cooler plates May 9, 2006
In a fuel cell stack (11a), a larger number of fuel cells (18 21, 33 36) are interposed between successive cooler plates (13 15) without creating excessively high temperatures in those fuel cells (33 36) which are remote from the cooler plates, by virtue of increased air flow in air
7041405 Fuel cell voltage control May 9, 2006
An auxiliary load (148) for a fuel cell stack (102) is alternatively connected and disconnected from the fuel cell external circuit (177, 178) by a switch (200) in response to a switch control (201), repetitively, during startup and shutdown. The switch may be an insulated gate bipolar
7037612 Moisture stabilization for a fuel cell power plant system May 2, 2006
An arrangement and process are provided for regulating the humidification or dew point of inlet air supplied (124, 224, 324, 424) to combustion-supported reaction means (20, 120) of a fuel processing system in a fuel cell power plant (110, 210, 310, 410). In addition to flowing exhau
7033557 Method for removal of contaminants from a hydrogen processor feed stream, as in a fuel cell powe April 25, 2006
Method and apparatus are provided for removing contaminants from a hydrogen processor feed stream, as in a fuel cell power plant (110). Inlet oxidant (38), typically air, required by a catalytic hydrogen processor (34) in a fuel processor (14) for a fuel cell stack assembly (12) in t
7014933 Cathode saturation arrangement for fuel cell power plant March 21, 2006
The heat from various portions of a fuel cell power plant (110) are redistributed in a manner allowing desired modification of/to the heat removal means (152,156), e. g., radiator (152), included in the coolant loop for the fuel cell stack assembly (CSA) (12). A humidifier (70) added
6991864 Storage of fuel cell energy during startup and shutdown January 31, 2006
During startup or shutdown of a fuel cell power plant, the electric energy generated by consumption of reactants is extracted by a storage control (200) in response to a controller (185) as current applied to an energy storage system 201 (a battery). In a boost embodiment, an inductor (2
6989208 Fuel cell power plant used as reformate generator January 24, 2006
A method for operating a fuel cell power plant to provide end-use electricity, end-use heat and end-use reformate includes the steps of providing a fuel cell power plant that consumes reformate to provide electricity and heat, said fuel cell power plant having a nominal reformate flo
6986959 Low temperature fuel cell power plant operation January 17, 2006
A fuel cell power plant system includes the ability to operate an enthalpy recovery device even under cold conditions. A bypass arrangement allows for selectively bypassing one or more portions of the enthalpy recovery device under selected conditions. In one example, the enthalpy recove
6986958 Fuel cell stack melting of coolant water during frozen startup January 17, 2006
A PEM fuel cell system (19) has a multifunction oxidant manifold (98) disposed contiguously beneath a fuel cell stack (20), serving as coolant accumulator (28). An electric heater (45) is powered by the fuel cell electrical output (47, 51) during frozen startup. Auxiliary pump (54) and
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