Abstract:
본 발명은 연료전지를 동력원으로 하는 자동차의 머플러에 관한 것으로서, 현재 연료전지 차량에서는 배기가스를 특별한 장치 없이 머플러를 통해 대기로 방출하고 있는데 동절기 운행 시, 상대습도가 거의 100%에 가까운 연료전지 가스는 배출되면서 차가운 공기와 직접 접촉하면서 구름과 같은 수증기를 생성하게 된다. 이렇게 배기가스에 포함되어 배출되는 다량의 수증기는 주행 시, 차량 미관뿐만 아니라 후방 또는 측면에서 주행하는 차량의 시야를 방해하며 주행 안전성에 심각한 영향을 미칠 수 있다. 본 발명은 이렇게 방출되는 배기가스의 수증기를 차량 외부로 방출되기 전에 외부 공기와의 열전달, 혼합 및 배기가스의 국부적인 가열을 통하여 배기가스가, 상대습도 100% 이하의 가시적인 수중기를 포함하지 않고, 배출할수 있도록 하는 머플러 를 제공하는데 있다. 연료전지, 배기가스
Abstract:
PURPOSE: A detecting device of a gas diffusion layer for a fuel cell is provided to measure the physical properties like dimension, surface pollution level, thickness conductivity, flexural strength at one, thereby quickly conducting pre-examination of a gas diffusion layer. CONSTITUTION: A detecting device of a gas diffusion layer for fuel cell comprises: a lower examination jig part(20) measuring the weight and bending strength of a gas diffusion layer and fix mounting a gas diffusion layer at the same time; an upper examination jig part(30) arranged to be able to be moved up and down by a lifting driving unit(50); a plurality of vision examination parts(32) detecting dimension and surface pollution of the gas diffusion layer; a thickness measurement part(34) measuring the thickness of the gas diffusion layer; an eleelectroconductivity measurement part(36) measuring the electric conductivity of the gas diffusion layer; and a control part(40) detecting defective products of the gas diffusion layer.
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:
A gasket structure for preventing contamination of a stack in a fuel cell is provided to improve cold startability of a fuel cell vehicle by using antifreeze as coolant and prevent a membrane-electrode assembly from being contaminated with the antifreeze. A gasket structure for preventing contamination of a stack in a fuel cell includes: a membrane-electrode assembly(10) comprising a polymeric electrolyte membrane and electrodes; and a gasket(30) which is interposed between a separator(20) and the membrane-electrode assembly, wherein the gasket has an antipollution groove(32) formed along the underside of the gasket so as to prevent the membrane-electrode assembly from being contaminated with antifreeze leaked from an antifreeze manifold(30b) of the separator. The separator is disposed on the front/backside of the membrane-electrode assembly and has manifolds(30a-c) for inflows/outflows of air, hydrogen, and antifreeze.
Abstract:
Provided are a novel polyimide-polybenzimidazole copolymer, a polymer electrolyte membrane comprising the copolymer which is excellent in hydrogen ion conductivity, electrochemical stability and thermal stability even in the anhydrous state of high temperature, and its preparation method. The polyimide-polybenzimidazole copolymer is represented by the formula 1, wherein R is a compound having a diamine group; n is an integer of 5-80; and n+m is 100. Preferably n:m is 20:80 in the polymer membrane. The method comprises the steps of dissolving the polyimide-polybenzimidazole copolymer of the formula 1 in an organic solvent to prepare a polyimide-polybenzimidazole copolymer solution; coating the solution on a substrate to prepare a polymer membrane; and dipping the polymer membrane in an acid solution to prepare a polymer electrolyte membrane.