Abstract: A fuel cell stack manifold having an ejector function of which the manufacturing cost and the weight can be reduced by optimizing hydrogen supply and recirculation channels and removing other members. hardware without a separate ejector structure for additionally attaching an ejector, of which the productivity can be improved by removing from an ejector assembly process. The fuel cell system minimizes joints through which hydrogen may leak, by implementing a new structure of a manifold added with an ejector function by integrally forming/manufacturing a stack manifold having a venturi and diffuser structure and adding a nozzle thereto.

Abstract: A hydrogen feed and recirculation device for a fuel cell system supplies hydrogen from a hydrogen tank and unreacted recirculated hydrogen discharged from a stack to the stack. The hydrogen feed and recirculation device can supply hydrogen to the stack through a first nozzle when hydrogen supply pressure is low and supply the hydrogen to the stack through a second nozzle using a Coanda Effect other than the first nozzle when the hydrogen supply pressure is high to satisfy a required hydrogen supply amount through an entire operating area of the fuel cell and prevent nozzle vibration and noise generation.

Abstract: Disclosed are a chemochromic nanoparticle, a method for manufacturing the chemochromic nanoparticle, and a hydrogen sensor comprising the chemochromic nanoparticle. In particular, the chemochromic nanoparticle has a core-shell structure such that the chemochromic nanoparticle and comprises a core comprising a hydrated or non-hydrated transition metal oxide; and a shell comprising a transition metal catalyst.

Abstract: A fuel cell system having an ejector includes a stack for generating electricity by using air and fuel gas being supplied thereto. A fuel gas circulating line re-circulates the fuel gas from an outlet of the stack to an inlet of the stack. An ejector is mounted to the fuel gas circulating line for supplying fresh fuel gas and circulating the fuel gas. The ejector includes a vacuum suction pipe having one side connected to the fuel gas re-circulating line and a fuel gas spray nozzle mounted to the vacuum suction pipe for spraying the fuel gas to form a vacuum. An inner housing through which the fuel gas sprayed from the fuel gas spray nozzle passes. An outer housing is arranged on an outside of the inner housing to construct a condensed water space with the inner housing. The inner housing drains water from an inside of the inner housing to the condensed water space.

Abstract: A fuel cell system having a hydrogen supply manifold is provided and includes a stack that uses supplied air and fuel gas to generate electricity. A recirculation line recirculates a fuel gas, to an inlet of the stack. An ejector unit is disposed on the recirculation line, supplies fresh fuel gas, and circulates the recirculated gas. The ejector unit includes a middle pressure manifold in which a nozzle mounting portion is formed and a supply passage to transmit fuel gas to the nozzle mounting portion. A control valve is disposed on the middle pressure manifold to adjust fuel supplied to the stack. A nozzle is engaged with an end portion of the nozzle mounting portion to inject fuel gas supplied through the supply passage. Additionally, a low pressure manifold is engaged with the middle pressure manifold to suction and mix exhaust gas of the stack.

Abstract: A method for calculating an amount of hydrogen consumed by a fuel cell vehicle, in order to improve the accuracy of fuel efficiency calculation when the fuel cell vehicle travels under real-world conditions, includes: calculating a hydrogen consumption amount via integration of stack current generated in a fuel cell stack, calculating an amount of unreacted hydrogen purged from the fuel cell stack, and calculating a final hydrogen consumption amount by adding the purged amount of hydrogen to the hydrogen consumption amount calculated via the stack current integration.

Abstract: The present invention relates to a fuel cell system for vehicles and a method for controlling the same which stably maintains an output of a fuel cell by precisely estimating a recirculated hydrogen amount to a stack. A fuel cell system according to the present invention may include: a stack comprising a plurality of unit cells for generating electrical energy by electrochemical reaction of a fuel and an oxidizing agent; a blower for recirculating a gas exhausted from the stack so as to supply the gas back to the stack; an ejector for recirculating the gas exhausted from the stack, receiving hydrogen so as to mix the hydrogen to the recirculated gas, and supplying the mixture to the stack; a sensor module for detecting a driving condition of the vehicle; and a control portion for controlling operations of the blower and the ejector by using the driving condition of the vehicle and performance maps of the blower and the ejector.

Abstract: A fuel cell including a stack in which a plurality of cells are stacked includes an air manifold and a hydrogen manifold on a first side and a second side of the stack, respectively, a jet array including a tubular body inserted in the air manifold or the hydrogen manifold and a plurality of orifices formed in the tubular body and arranged in a longitudinal direction of the tubular body, a pump or a valve for supplying air or hydrogen to the jet array; and a controller that operates the pump or the valve.

Abstract: A fuel cell system includes an air manifold through which air is supplied or exhausted, a fuel gas manifold through which fuel gas is supplied or exhausted, a stack portion that generates electricity by using air and fuel that are supplied by the air manifold and the fuel gas manifold, and an injection array that is disposed along an inside of the air manifold or the fuel gas manifold to inject air or fuel gas.

Abstract: An ejector for supplying a fuel, such as hydrogen, to a stack in a fuel cell system can automatically move a position of a nozzle according to an increase or a decrease of a system load. As a result, it is possible to control a necessary supply of hydrogen and a recirculation flow rate by selecting an area of a nozzle throat in the fuel cell system using the ejector, and specifically, of being automatically controlled to supply hydrogen through a small nozzle at a low load, such that a recirculation amount is increased.

Abstract: A manifold device of a fuel cell stack is provided which prevents moisture condensed in gases supplied to the fuel cell stack from excessively flowing into specific cells of the stack by heating gases supplied into the stack using heat of the stack. The manifold device also prevents flooding that is caused by liquid generated in cells disposed away from a gas inlet by removing a flow rate difference of gases generated in respective cells based on distances from the gas inlet of the stack.

Abstract: A fuel cell system having a hydrogen supply manifold according to an exemplary embodiment of the present invention may include a stack that uses air and fuel gas, which is supplied, to generated electricity, a recirculation line that recirculates a fuel gas, which is partially used by the stack to be exhausted, to an inlet of the stack, and an ejector unit that is disposed on the recirculation line, supplies fresh fuel gas, and circulates the recirculated gas, wherein the ejector unit may include a middle pressure manifold where a nozzle mounting portion is formed at one side and a supply passage is formed to transmit fuel gas to the nozzle mounting portion, a control valve that is disposed on the middle pressure manifold to control fuel that is supplied to the stack, a nozzle that is engaged with an end portion of the nozzle mounting portion to injects fuel gas that is supplied through the supply passage, and a low pressure manifold that is engaged with the middle pressure manifold, a chamber is formed to ho

Abstract: Disclosed herein is a hydrogen detecting sensor that includes a sulfide-metal catalyst, such that hydrogen gas can be detected visibly with naked eyes. Particularly, the hydrogen detecting sensor includes a substrate, a sulfide layer formed on the substrate and chemically discolored when exposed to hydrogen, and a metal catalytic layer formed on the sulfide layer.

Abstract: A hydrogen sensor and a method for manufacturing the same are provided. The hydrogen sensor includes a metal oxide layer formed over a substrate, and a catalytic pattern that is formed over the metal oxide layer. Further, a protective layer is formed over the catalytic pattern.

Abstract: A humidifier for a fuel cell system is provided to improve humidification efficiency of a hollow fiber improving a gas flow inside a membrane module into which tube side air and moist air are introduced. The humidifier includes a membrane module in which hollow fibers are fixed inside a case in a bundle form and a first manifold and a second manifold each assembled at both ends of the case. An inside of the membrane module includes a tube side air supply tube which forms a gas flow in the same direction as the hollow fiber and one side of the tube side air supply tube includes at least one moist air pumping part configured to suction moist air flowing in an exterior of the tube side air supply tube by a flow velocity and a flow pressure of tube side air.

Abstract: A fuel cell is provided which comprises a plurality of manifolds at a first end and a second end of the fuel cell and a separator having passages between the first and the second ends of the fuel cell. In particular, the fuel cell includes a nozzle disposed between at least one of the plurality of manifolds and the passages and having an inlet into which a material is introduced from the at least one of the plurality of manifolds and an outlet from which the introduced material is discharged to the passages.

Abstract: An ejector for supplying a fuel, such as hydrogen, to a stack in a fuel cell system can automatically move a position of a nozzle according to an increase or a decrease of a system load. As a result, it is possible to control a necessary supply of hydrogen and a recirculation flow rate by selecting an area of a nozzle throat in the fuel cell system using the ejector, and specifically, of being automatically controlled to supply hydrogen through a small nozzle at a low load, such that a recirculation amount is increased.

Abstract: A fuel cell stack manifold having an ejector function of which the manufacturing cost and the weight can be reduced by optimizing hydrogen supply and recirculation channels and removing other members. hardware without a separate ejector structure for additionally attaching an ejector, of which the productivity can be improved by removing from an ejector assembly process. The fuel cell system minimizes joints through which hydrogen may leak, by implementing a new structure of a manifold added with an ejector function by integrally forming/manufacturing a stack manifold having a venturi and diffuser structure and adding a nozzle thereto.

Abstract: A fuel cell system having an ejector includes a stack for generating electricity by using air and fuel gas being supplied thereto. A fuel gas circulating line re-circulates the fuel gas from an outlet of the stack to an inlet of the stack. An ejector is mounted to the fuel gas circulating line for supplying fresh fuel gas and circulating the fuel gas. The ejector includes a vacuum suction pipe having one side connected to the fuel gas re-circulating line and a fuel gas spray nozzle mounted to the vacuum suction pipe for spraying the fuel gas to form a vacuum. An inner housing through which the fuel gas sprayed from the fuel gas spray nozzle passes. An outer housing is arranged on an outside of the inner housing to construct a condensed water space with the inner housing. The inner housing drains water from an inside of the inner housing to the condensed water space.

Abstract: The present invention provides an apparatus for controlling hydrogen supply of a fuel cell system and a method for controlling the same. The apparatus includes a jet pump, a proportional control solenoid valve, and a controller. The jet pump is disposed at the side of an inlet of a fuel cell stack and performs supply and recirculation of hydrogen into the fuel cell stack. The proportional control solenoid valve is connected to a hydrogen supply line and fluidly communicates with a nozzle inlet of the jet pump to control the hydrogen supply to the jet pump. The controller controls an operation of the proportional control solenoid valve according to a power of the fuel cell system. Here, the controller controls the operation of the proportional control solenoid valve according to a pulse flow control method at a low power section in which a current power is lower than a predetermined reference power.