An air supply system for a fuel cell includes: a fuel cell stack in which multiple unit cells are stacked and that generates electricity through chemical reactions, an air channel to supply incoming air containing oxygen to the fuel cell stack and to transfer air discharged from the fuel cell stack to the outside of the air supply system, and a gas adsorption unit that is disposed on the air channel, positioned near an outlet of the fuel cell stack, and adsorbs oxygen contained in the air introduced into the air channel.

A method for estimating a plurality of parameters pertaining to an electrochemical model of a cell may include: obtaining, by a device, an Electrochemical Impedance Spectroscopy (EIS) spectrum and a Constant Current-Constant Voltage (CC-CV) charge-Constant Current (CC) discharge response of the cell; extracting, by the device, a plurality of features from the EIS spectrum and a plurality of features from the CC-CV charge-CC discharge response of the cell; and estimating, by the device, the plurality of parameters based on at least one of the plurality of features of the EIS spectrum and at least one of the plurality of features of the CC-CV charge-CC discharge response of the cell.

Disclosed is a membrane humidifier for a fuel cell, which can prevent, without a separate gas filtering device, performance deterioration of a fuel cell due to harmful gases during a humidifying process. The humidifier for a fuel cell, according to the present invention, comprises: a housing unit comprising a first fluid inlet via which a first fluid flows in, a first fluid outlet via which the first fluid flows out, a second fluid inlet via which a second fluid flows in, and a second fluid outlet via which the second fluid flows out, wherein the humidity of the first fluid flowing in via the first fluid inlet is different from the humidity of the second fluid flowing in via the second fluid inlet; at least one first cartridge which is installed inside the housing unit, and in which a plurality of hollow fiber membranes are accommodated; and a gas filter which is provided inside the first cartridge or between the inner circumferential surface of the housing unit and the first cartridge so as to be able to collect harmful gases contained in the first fluid and/or the second fluid, and which has a different shape from the hollow fiber membranes.

The invention relates to a coupling device for a tube having a Palladium-based membrane deposited thereon, for use in separation and purification of hydrogen in a hydrogen separator or reactor. The coupling device has an inlet for gas and configured to couple said tube to the inlet; a body part with a cylindrical opening for receiving the tube and for receiving gas flow to the inlet; a nut, the body part and the nut being configured such that the nut can be screwed onto the body part at the opening; a stack of at least two sealing rings. The body part, the nut and sealing rings are configured such that the tube extends through an axial end portion of the nut, the sealing rings into the opening such that, in use, the sealing rings are compressed axially as a result of screwing the nut onto the body part so that the sealing rings sealingly engage the tube.

A fuel cell system includes a polymer electrolyte fuel cell that generates electric power using fuel gas and oxidant gas, a fuel gas supply path through which the fuel gas is supplied to an anode inlet of the fuel cell, a recycle gas path through which anode off-gas discharged from an anode outlet of the fuel cell returns to the fuel gas supply path, a pressure booster that is arranged in the fuel gas supply path between a confluence portion and the anode inlet, the fuel gas supply path and the recycle gas path meeting each other in the confluence portion, and a discharge path through which an impurity mixed into the anode off-gas is discharged outside.

Membrane-based hydrogen purifiers having graphite frame members. The purifiers include a hydrogen-separation membrane module with at least one membrane cell containing at least one hydrogen-selective membrane, which includes a permeate face and an opposed mixed gas face, and a fluid-permeable support structure that physically contacts and supports at least a central region of the permeate face. The membrane cell further includes a permeate-side frame member and a mixed gas-side frame member. The permeate-side frame member is interposed between the hydrogen-selective membrane and the fluid-permeable support structure to physically contact a peripheral region of the permeate face and a peripheral region of the fluid-permeable support structure. The mixed gas-side frame member physically contacts a peripheral region of the mixed gas face. At least one of the permeate-side frame member and the mixed gas-side frame member is a graphite frame member.

An electrochemical cell includes a first hydrogen-rich zone including a cathode, a second hydrogen-poor zone including an anode, an electrical component, and a sorbent configured to capture hydrogen in the second zone and release hydrogen protons into the first zone, an electrolyte located between the cathode and the sorbent, and an electrical circuit arranged to apply voltage bias to remove the captured hydrogen from the sorbent.

One side of a casing of a fuel cell stack is provided with an opening, a filter permeable to a fuel gas, and a cover covering the filter. The cover includes a first vent connecting the inside and the outside of the cover, and a second vent provided below the first vent and connecting the inside and the outside of the cover.

The invention provides a hybrid power system, which integrates an internal combustion engine with a solid oxide fuel cell (SOFC) stack and provides power for the vehicle through the internal combustion engine at first in the preheating stage of the SOFC stack, thereby solving the problem that an SOFC stack is unable to provide power for the vehicle in the preheating stage. At the same time, the internal combustion engine burns fuel gas, outputs high temperature exhaust gas, heats the heat exchanger with the high temperature exhaust gas, then discharges the exhaust gas from an exhaust turbine and inhales air from the outside of the system. The air first passes through an air preheater, then passes through a heat exchanger and then enters the inside of the SOFC stack, preheats the air preheater through an air pipeline and then is discharged. After multiple cycles, the preheating of the SOFC stack is completed. As the air preheater is connected to the heat exchanger in series to heat the air, the heating speed of the air entering the SOFC stack is raised, the preheating time is shortened and a quick start of the SOFC stack is achieved so that the SOFC stack can be used to achieve the purpose of providing power for the vehicle efficiently.

A rebalancing reactor for a redox flow battery system may include a first side through which hydrogen gas is flowed, a second side through which electrolyte from the redox flow battery system is flowed, and a porous layer separating and fluidly coupled to the first side and the second side, wherein, the hydrogen gas and the electrolyte are fluidly contacted at a surface of the porous layer, and a pressure drop across the second side is less than a pressure drop across the porous layer. In this way, rebalancing of electrolyte charges in a redox flow battery system may be performed with increased efficiency and cost effectiveness as compared to conventional rebalancing reactors.