Absstract of: US2025201871A1
Systems and methods are provided for a cell of a redox flow battery system. The electrode cell includes a membrane frame assembly, a bipolar plate frame assembly, and a thermal weld positioned between the membrane frame assembly and the bipolar plate frame assembly. The thermal weld includes material from a frame of the membrane frame assembly and a frame of the bipolar plate frame assembly.
Absstract of: US2025201866A1
A bipolar plate alignment system includes a bipolar plate, a gasket seal, and an adhesive film. The bipolar plate is formed to include a seal groove and a plate alignment feature extending outwardly from a perimeter of the bipolar plate. The gasket seal is sized to fit within the seal groove and is formed to include a seal alignment feature extending outwardly from a perimeter of the gasket seal.
Absstract of: US2025201885A1
Metal chelates, methods of making the metal chelate, electrolyte formulations comprising metal chelates, and electrochemical devices for energy storage using or including at least one metal chelate are disclosed. The disclosure also relates to a method to provide a metal to an electrolyte in a flow battery to plate an electrode while the electrode is in the battery.
Absstract of: US2025201875A1
In some examples, a water recovery system is configured to extract water from an exhaust of a fuel cell assembly. The water recovery system includes a condenser configured to transfer heat from the exhaust, an extractor configured to extract water from the exhaust, and a turbine configured to extract energy from the exhaust. The condenser is configured to transfer the heat to a turbine exhaust of the turbine and provide the exhaust to the extractor. The extractor is configured to provide the exhaust to the turbine. In examples, a compressor is configured to compress the exhaust prior to the heat transfer by the condenser.
Absstract of: US2025201888A1
Disclosed are an insulating manifold for electrochemical reaction configured to receive gas from an external source, and an electrochemical reaction system in which there is no electrical contact between a stack and a manifold. The insulating manifold for the electrochemical reaction includes a plate-shaped base manifold having at least a first fluid conduit and a second fluid conduit extending therethrough vertically; a housing disposed on top of the base manifold and having a vertical wall and an open bottom surface, wherein a lower edge of the housing is coupled to a top of the base manifold; and upper and lower insulating plates respectively defining an upper surface and a lower surface of an inner space defined by the base manifold and the housing.
Absstract of: US2025201878A1
A cold start system of a fuel cell vehicle can include an auxiliary component of a fuel cell vehicle, a fuel cell stack, and a controller that calculates an output voltage of the fuel cell stack based on an available output of the fuel cell vehicle, calculates a voltage offset based on a general performance of the fuel cell stack, and calculates a final voltage by adding up the calculated output voltage and voltage offset of the fuel cell stack.
Absstract of: US2025201882A1
In an apparatus and method for recovering degradation of an anode catalyst, the apparatus increases a hydrogen flow rate supplied to the anode of the operating fuel cell stack above a normal value, estimates a nitrogen concentration of the anode based on the hydrogen concentration of the anode, and pulse-controls an output voltage of the fuel cell stack in response that the nitrogen concentration of the anode reaches a preset value, electrochemically oxidizing carbon monoxide adsorbed on the surface of the anode catalyst.
Absstract of: US2025201877A1
A cold start control method of a fuel cell stack, and system thereof, can include determining by a controller whether cold start is required, opening an air cut-off valve by the controller when the cold start is required, determining by the controller whether an output voltage of a fuel cell stack is recovered, and satisfying a cold start completion criteria of the fuel cell stack by controlling an opening amount of the air cut-off valve when the output voltage of the fuel cell stack is recovered.
Absstract of: US2025201874A1
An apparatus for controlling water emission of a vehicle includes: a water amount determination part configured to determine an amount of water held in the vehicle through a sensor; a surrounding situation recognition part configured to recognize nearby vehicles including a trailing vehicle driving within a predetermined distance behind the vehicle; and a vehicle controller configured to control at least one of an emission time or an emission amount of the water, depending on the amount of water and a presence or absence of the nearby vehicles.
Absstract of: US2025201872A1
A method of manufacturing a unit cell for a fuel cell stack includes an operation of preparing a separator and an operation of inputting the prepared separator into a mold and forming a protrusion that protrudes toward one side of the separator at a point thereof.
Absstract of: US2025201883A1
A membrane electrode assembly processing apparatus and a membrane electrode assembly manufacturing apparatus may include a composite punching roller configured to punch out a membrane electrode assembly unit from a membrane electrode assembly continuous film including at least one membrane electrode assembly unit and to apply an adhesive to an outer peripheral area of an electrode layer of the membrane electrode assembly unit.
Absstract of: US2025201867A1
An example embodiment of the present disclosure provides a separator for an electrochemical device including a fluid inlet, a fluid outlet, and a plurality of streamlined walls configured to provide at least a portion of a flow path connected to the fluid inlet and the fluid outlet, and at least two of the plurality of streamlined walls, including one streamlined wall closer to the fluid inlet than another streamline wall, have a shape in which straight lines connecting one end and the other end are not parallel to each other.
Absstract of: US2025201873A1
An apparatus for cooling a fuel cell stack includes: a first refrigerant line through which a working fluid flows; a fuel cell stack provided in the first refrigerant line; a condenser provided in the first refrigerant line and disposed at a downstream side of the fuel cell stack; a pressure control valve provided in the first refrigerant line and disposed at a downstream side of the condenser; and a fluid pump provided in the first refrigerant line and disposed at a downstream side of the pressure control valve.
Absstract of: US2025201185A1
A display device may include: a display panel including a pixel having a light-emitting device, where the pixel may be driven in a first or second frequency mode; and a gate driver circuit configured to supply at least one gate signal and at least one light emission control signal to the pixel. The light-emitting device may emit light by a driving current flowing from a first power voltage to a second power voltage in response to a data signal. The pixel may receive a reset signal having a voltage level less than a threshold voltage of the light-emitting device after the data signal is received while the display device is driven in the second frequency mode. The at least one light emission control signal may have a low voltage level at a portion of a period during which the at least one gate signal has a high voltage level.
Absstract of: US2025201881A1
According to one embodiment, a fuel cell system includes: a fuel cell stack; a storage part that stores a water component including circulating water supplied to the fuel cell stack, and generated water generated in and discharged from the fuel cell stack; a gas outlet pipe that sends a gas discharged from the fuel cell stack to the storage part; a pressure acquisition part that acquires a pressure of the gas discharged from the fuel cell stack; a drain pipe connected to the storage part to allow the water component discharged from the storage part to flow therethrough; a drain valve on the drain pipe; and a control device. The control device controls opening and closing of the drain valve based on a pressure of a gas acquired by the pressure acquisition part.
Absstract of: US2025201868A1
A cell stack of a fuel cell includes single cells stacked in a thickness direction. Each single cell includes a membrane electrode gas diffusion layer assembly and plate-shaped separators that sandwich the membrane electrode gas diffusion layer assembly from opposite sides in the thickness direction. Adjacent ones of the separators of the single cells, which are stacked in the thickness direction, are welded to each other at the tips of the protrusions. One of the tips of the protrusions of the adjacent separators includes a convex portion, and the other one of the tips includes a concave portion. The tips of the protrusions of the adjacent separators are in contact with each other such that the convex portion interlocks with the concave portion.
Absstract of: US2025201880A1
To provide a fuel cell system configured to increase efficiency. A fuel cell system, wherein the fuel cell system comprises a fuel cell, a cooling system and a control device; wherein the cooling system comprises a cooling water pump and a reserve tank; wherein, when a temperature of cooling water is equal to or lower than a low-temperature determination threshold value, the control device is configured to perform temperature increase control for increasing the temperature of the cooling water to a target temperature; wherein, after the temperature increase control, the control device is configured to cool the temperature of the cooling water to a normal use temperature lower than the target temperature; and wherein the target temperature is set based on at least one of a pressure resistance of the cooling system or an operating pressure of the reserve tank.
Absstract of: US2025201886A1
An electrochemical cell device includes a cell stack, a support body, and a fixing material. The cell stack includes two or more cells each having a first end and extending from the first end in a first direction. The support body supports one end portion of the cell including the first end. The fixing material is located between the cell stack and the support body. The two or more cells include a first cell. The fixing material includes a first portion located closer to the first cell than the support body is and including a protruding portion protruding in the first direction or a direction opposite to the first direction.
Absstract of: US2025202268A1
A fuel cell system includes a fuel cell, a control device, an auxiliary power source serving as a first power storage device, and a receiving power storage device serving as a second power storage device. Under control of the control device, power output from the fuel cell is supplied to an external load and is also charged to the auxiliary power source, in a state in which supply of liquid fuel to the fuel cell is being carried out. Further, in addition to the power output from the fuel cell, post-stoppage power recovered by the receiving power storage device is discharged and supplied to the external load. Power charged in the auxiliary power source is discharged and supplied to the external load in a state in which supply of liquid fuel to the fuel cell is stopped.
Absstract of: US2025201876A1
Disclosed herein are aspects of an adaptive purge technique for purging fuel cells adjusts the time delay between subsequent purges based in part on one or more parameters of the fuel cells. A difference between two like parameters is measured before and after actuation of a valve used to permit entry of a purge gas. The degree of difference between the two parameters is used to determine a time delay, i.e., a time at which the valve should again be actuated to permit the next purge of the fuel cell. In additional to the time delay, the parameters may be used to determine a time interval, or duration, in which the valve is actuated to remain open during a purge event.
Absstract of: US2025198005A1
A method for producing a coated chromium-containing component includes providing a coating mixture of a solvent and a source of praseodymium and/or a source of terbium, contacting the surface of the component with the coating mixture, optionally drying, and heating the component in an oxidising atmosphere at a temperature of 450° C. or higher. Examples include coated components for a device, and electrochemical devices with coated components, the components having a surface coating including at least one layer that includes a praseodymium material and/or terbium material. The method produces coatings that reduce chromium evaporation and are useful as barriers on a chromium-containing components.
Absstract of: US2025201879A1
A method for a soft-start strategy of a fuel cell includes: providing a fuel cell, wherein the fuel cell is connected to load, providing a capacitor, wherein the capacitor is connected in between the fuel cell and the load, wherein the fuel cell includes an anode and a cathode and the anode and the cathode are in a preconditioned state, the method further including filling the cathode with a mass rate derived from a proportion of an input gas and a used gas, and a predefined current, such that the predefined current does not exceed a maximum current during a precharge of the capacitor.
Absstract of: US2025201884A1
The present invention relates to a membrane-electrode-assembly for a proton exchange membrane (PEM) fuel cell or an electrolyzer comprising the following components: a first gas-permeable electrode layer, a first self-supporting nanoporous catalyst layer comprising a noble metal, and a membrane, wherein the first self-supporting nanoporous catalyst layer extends between the first gas-permeable electrode layer and the membrane, characterized in that the first self-supporting nanoporous catalyst layer is formed by a plurality of grains of a first catalyst compound, wherein gaps are formed in between the grains such as to form an increased surface area of the first self-supporting nanoporous catalyst layer for enhancing catalytic reactions, wherein the first self-supporting nanoporous catalyst layer is self-supported by the noble metal.
Absstract of: US2025201869A1
A flow plate for a fuel cell includes a substrate including a flow inlet and a flow outlet, and a flow field in fluid communication with both the flow inlet and the flow outlet including flow channels. The flow channels include at least two serpentine channels, each of the at least two serpentine channels defining a channel inlet and a channel outlet and including at least one curved section inducing a change in the flow direction in the respective serpentine channel, and the flow channels also including a straight interdigitated channel extending between the at least two serpentine channels, and defining a channel inlet and a closed channel end.
Nº publicación: US2025201887A1 19/06/2025
Applicant:
LAIR LIQUIDE SA POUR LETUDE ET L\u2019EXPLOITATION DES PROCEDES GEORGES CLAUDE [FR]
L'Air Liquide, Societe Anonyme pour l'Etude et l\u2019Exploitation des Procedes Georges Claude
Absstract of: US2025201887A1
The invention relates to a proton-exchange membrane fuel cell comprising a stack of a plurality of cells, the stack being sandwiched between a first clamping plate and a second clamping plate in order to apply a predetermined clamping pressure to the stack, one of the clamping plates comprising at least one tapered seat leading into a through-hole, the stack comprising at least one clamping device that comprises a tie rod and a tapered washer received by the tapered seat in such a way that the tapered portions are facing one another, the tie rod being held in position by a first of its ends by the tapered washer so as to apply a clamping pressure to the stack.