Abstract:
본 발명은 연료전지 열화 방지 방법에 관한 것으로서, 운행 중인 연료전지 차량에서 스택 유출수의 불소이온농도 또는 pH 값을 실시간으로 측정하여 스택의 전해질막 상태를 확인하고, 전해질막의 열화 가능성이 있는 것으로 판단되면 현재의 열화 가속화 인자를 확인하여 해당 인자에 대한 막 안정화 조건이 유지될 수 있도록 인자별 설정된 제어 과정에 따라 차량 및 스택의 운전 조건을 제어함으로써, 전해질막의 열화를 효과적으로 방지하고, 스택의 성능 및 내구성을 향상시킬 수 있는 연료전지 열화 방지 방법에 관한 것이다. 연료전지, 스택, MEA, 전해질막, 열화, 불소이온, 불소유출속도
Abstract:
PURPOSE: A manufacturing method of a membrane electrode assembly for a fuel cell is provided to simplify the manufacturing process of the membrane electrode assembly, and to reduce the amount of a white pole catalyst. CONSTITUTION: A manufacturing method of a membrane electrode assembly for a fuel cell to form a nano surface structure on a polymer electrolyte membrane comprises the following steps: plasma treating the surface of the polymer electrolyte membrane(30) located in a chamber for plasma treating using PACVD method, while maintaining the pressure range of the chamber into 1.0×10^(-7)~2.75×10^(-3) pascals; forming a nanostructure(40) with hair patterns on the surface of the polymer electrolyte membrane by plasma treating for 1 seconds~60 minutes; and evaporating a catalyst on the surface of the polymer electrolyte membrane.
Abstract:
PURPOSE: An apparatus and a method for manufacturing a metallic separator are provided to minimize springback generated in a stamping process and excess thinning at a local region. CONSTITUTION: An apparatus for manufacturing a large metallic separator(20) using an incrementally synchronized rapid rubber forming process comprises at least one upper die formed on the upper surface with the predetermined pattern; a transfer unit for transferring the lower die while crossing it in a different direction; and a pressing unit for repetitively pressing the total area of a metal thin plate.
Abstract:
PURPOSE: A membrane-electrode assembly for bonding MEA and GDL of fuel cell stack is provided to facilitate lamination between an electrode catalyst layer and a gas diffusion layer, and to enable mass production of a fuel cell stack. CONSTITUTION: A method for bonding a membrane-electrode assembly(10) and a gas diffusion layer(18) comprises the steps of: coating a catalyst layer(14) at both surfaces of a polymer electrolyte membrane(12); attaching sub-gaskets(16) at the edge area of both surfaces of the polymer electrolyte membrane; and laminating a gas diffusion layer on the surface of the catalyst layer and bonding the surface of the sub gasket and the edge of the gas diffusion layer.
Abstract:
PURPOSE: An end plate for fuel cell stack is provided to lighten a fuel cell stack, to maintain even contact pressure of a stack while exhibiting proper flexural rigidity when it is connected to the fuel cell stack. CONSTITUTION: An end plate for fuel cell stack comprises a core material(20) in which a foam(22) is built in inside each cell of a honeycomb(21), and a plane material(10) which surrounds the core material. The foam built in inside each cell of a honeycomb is the expanded foam or the form consisting of closed cell. A heat-insulating unit is included in a honeycomb or a form.
Abstract:
An apparatus for recovering a catalyst for a fuel cell, and its method are provided to recovery a platinum catalyst easily without the loss of peripheral power by using the spontaneous reduction of a carbon nanotube. A method for recovering a platinum catalyst from an air electrode(14) comprises the steps of passing the exhaust air ejected from the air electrode of a fuel cell stack(10) through a filter filled with a carbon nanotube; performing the spontaneous reduction of a Pt ion at the filter filled with a carbon nanotube and simultaneously adsorbing the reduced Pt nanoparticle to the carbon nanotube so as to recovery Pt; flowing the exhaust air containing a very small amount of Pt ions passed the filter filled with a carbon nanotube into a humidifier(18); and mixing the very small amount of Pt ions and water in the humidifier, and supplying the mixture together with new air to the fuel cell stack.
Abstract:
A metal separator for a fuel cell is provided to prevent the obstruction of the fluid flux through an oiling pipe by forming a sub-flow channel having small width and small cross-sectional area compared with the oiling pipe. A metal separator(100) for a fuel cell is manufactured though a stamping molding process by using two metallic thin films. A cooling channel is formed at the inner side of a first metallic thin film(101) and a second metallic thin film(102) in stamping molding. The respective first and second oiling pipes(104, 105) are formed at the outer side of the first and the second metallic thin films. The respective first and second subsidiary flow channels (107, 108) are formed on the floor side of the first and the second oiling pipes.
Abstract:
A condensate water drain apparatus of a fuel cell stack for automobile is provided to discharge the condensed water smoothly even if the hydrogen exhaust line is horizontally mounted, in platform vehicles in which the height of the fuel cell stack is restrictive. A condensate water drain apparatus of a fuel cell stack for automobile includes a reservoir(10) of the box type which is installed at the hydrogen exhaust line, separating the condensed water included in the hydrogen gas and storing it; a tubular hydrogen inlet(11a,11b) formed at the upper part of the reservoir and a tubular hydrogen outlet(12) formed at the bottom part of the reservoir; at least one sensor(13,14) for sensing the water level fixed to the front side of the reservoir; and a condensate outlet(15) opened and closed according to the set amount sensed through teh sensors.
Abstract:
An intelligent membrane electrode assembly for a fuel battery is provided to measure the resistance and temperature of the membrane electrode assembly and the voltage of a cell easily and to block the heat flow delivered to a catalyst layer of a membrane electrode from an outside low temperature heat source. An intelligent membrane electrode assembly for a fuel battery includes an electrode membrane(100) adhered with an ion exchange membrane support film(202) at both sides of the boundary of the ion exchange membrane and is coated with a catalyst layer(201) at both sides of the ion exchange membrane(200); a flexible substrate adhered to one surface of the ion exchange membrane support film along the outline of the catalyst layer; a substrate circuit terminal adhered to one end part of the flexible substrate; and a connector connected with an outside controller to exchange the signal.
Abstract:
본 발명은 고분자 전해질 연료전지의 성능을 향상시키고, 수소 사용량을 줄임과 동시에 연료전지 제작후에 안정적인 성능을 나타낼 수 있도록 연료전지의 성능을 최대한 확보하기 위한 차량용 연료전지의 활성화 방법에 관한 것이며, 이를 위해 본 발명은, 연료전지를 활성화하기 위해 장비에 장착하는 단계; 상기 연료전지에 수증기를 공급하는 가습기의 가습 상태와 냉각수의 상태를 변화시키는 단계; 상기 연료전지에 반응가스를 공급하고 무부하 상태로 유지시키는 단계; 상기 연료전지에 공급되는 반응가스를 변화시키면서 부하상태로 유지시키는 단계; 상기 연료전지의 상태를 무부하 상태로 변경시키고, 반응가스를 재공급하는 단계; 및 상기 연료전지가 무부하 상태로 작동될 때 측정된 데이터와 부하 상태로 작동될 때의 데이터를 각각 비교하는 단계를 포함하여 구성되는 것을 특징으로 하는 차량용 연료전지의 활성화 방법을 제공한다. 연료전지, 활성화, 무부하,부하