摘要:
The present invention provides a method for reverse activation of a fuel cell, which can improve fuel cell performance by performing a first fuel cell activation process and then performing a second fuel cell activation process in which a hydrogen inlet and a hydrogen outlet of the fuel cell are shifted to an air (or oxygen) inlet and an air (or oxygen) outlet of the fuel cell.
摘要:
The present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer, which functions to supply hydrogen and air (oxygen) as reactant gases to a fuel cell stack, discharge product water generated by an electrochemical reaction, and transmit generated electricity, being formed with a thinned structure.For this purpose, the present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer being formed with a dual layer structure including a microporous layer and a macroporous substrate, the macroporous substrate being formed of a material selected from the group consisting of carbon fiber felt and carbon fiber paper, the gas diffusion layer being thinned to have a thickness of 200 to 300 μm at 25 kPa and a thickness of 170 to 250 μm at 1 MPa, a density of 0.20 to 0.60 g/cm3 at 25 kPa, a porosity of 50 to 90% measured by mercury intrusion, and a through-plane electrical resistance of 30 mΩ·cm2 or lower measured at a clamping pressure of 1 MPa.
摘要翻译:本发明提供一种燃料电池车辆的气体扩散层,其具有改进的操作稳定性,气体扩散层用于将氢气和空气(氧气)作为反应气体供应到燃料电池堆,排出由电化学反应产生的产物水 并且发送生成的电力,形成有薄的结构。 为此,本发明提供一种燃料电池车辆的气体扩散层,其具有改善的操作稳定性,气体扩散层由具有微孔层和大孔基体的双层结构形成,大孔基体由材料形成 选自由碳纤维毡和碳纤维纸组成的组,气体扩散层在25kPa下变薄至厚度为200-300μm,在1MPa下为170-250μm,密度为0.20至0.60 25kPa下的g / cm 3,通过水银侵蚀测定的孔隙率为50〜90%,夹钳压力为1MPa时测定的通孔面电阻为30mΩ·cm 2·cm 2以下。
摘要:
The present invention provides a method for bonding a membrane electrode assembly (MEA) and a gas diffusion layer (GDL) of a fuel cell stack, which facilitates stacking of an electrode catalyst layer of the MEA and the GDL and, at the same time, facilitates the keeping of the stacked layers for mass production of the fuel cell stack.For this purpose, the present invention provides a method for bonding a membrane electrode assembly and a gas diffusion layer of a fuel cell stack, the method including: coating a catalyst layer on a surface of a polymer electrolyte membrane; attaching a sub-gasket on the circumference of the polymer electrolyte membrane; and stacking a gas diffusion layer onto an outer surface of the catalyst layer by bonding all or a portion of an outer surface of the sub-gasket and the circumference of the gas diffusion layer with a bonding means.
摘要:
A gasket assembly suitable for use in a fuel cell includes a membrane electrode assembly; a separator comprising a manifold structure having a plurality of apertures; and a gasket disposed between the separator and the membrane electrode assembly. The gasket is positioned and configured to prevent the leakage of fluid from the manifold into the membrane electrode assembly and resultant loss in fuel cell performance. A contamination prevention groove is formed on one side of the gasket to form a channel along which any leaking fluid, e.g. antifeeze, can flow.
摘要:
The present invention relates to a device and a method for detecting a pin hole in a part of a fuel cell stack part to accurately detect the presence of pin holes of stack parts thereby ensuring quality of a fuel cell stack. That is, the present invention provides a system for detecting a pin hole in parts of a fuel cell stack that allows for quality assurance of the fuel cell stack and prevents defective parts from being used, by examining each fuel stack part, which largely influence the quality of the fuel cell stack, using an X-ray device and a vision system, in order to determine the presence of a pin hole in the parts, and a method thereof.
摘要:
The present invention features a pinhole detection system of a fuel cell that preferably includes a stage on which a fuel cell element unit is disposed to be detected, a drive portion that is configured to move the stage so as to rotate the fuel cell element unit, a X-ray source that is disposed at one side of the stage to apply X-ray to the fuel cell element unit that rotates, an image detector that detects X-ray penetrating the fuel cell element unit, and a computer tomography that reconstructs tormogram that is detected by the image detector to a three dimension. Preferably, the fuel cell element unit is rotated on the stage, X-ray is applied to the rotating unit to gain the tomogram thereof, and the tomogram is reconstructed to be a three-dimensional image through a computerized tomography (CT scanning) such that the pinhole formed within the unit can be effectively detected.
摘要:
The present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer, which functions to supply hydrogen and air (oxygen) as reactant gases to a fuel cell stack, discharge product water generated by an electrochemical reaction, and transmit generated electricity, being formed with a thinned structure.For this purpose, the present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer being formed with a dual layer structure including a microporous layer and a macroporous substrate, the macroporous substrate being formed of a material selected from the group consisting of carbon fiber felt and carbon fiber paper, the gas diffusion layer being thinned to have a thickness of 200 to 300 μm at 25 kPa and a thickness of 170 to 250 μm at 1 MPa, a density of 0.20 to 0.60 g/cm3 at 25 kPa, a porosity of 50 to 90% measured by mercury intrusion, and a through-plane electrical resistance of 30 mΩ·cm2 or lower measured at a clamping pressure of 1 MPa.
摘要翻译:为此,本发明提供一种燃料电池车辆的气体扩散层,其具有改善的操作稳定性,气体扩散层由具有微孔层和大孔基体的双层结构形成,大孔基体由材料形成 选自由碳纤维毡和碳纤维纸组成的组,气体扩散层在25kPa下变薄至厚度为200-300μm,在1MPa下为170-250μm,密度为0.20至0.60 25kPa下的g / cm 3,通过水银侵蚀测定的孔隙率为50〜90%,夹钳压力为1MPa时测定的通孔面电阻为30mΩ·cm 2以下。
摘要:
The present invention relates to a device and a method for detecting a pin hole in a part of a fuel cell stack part to accurately detect the presence of pin holes of stack parts thereby ensuring quality of a fuel cell stack. That is, the present invention provides a system for detecting a pin hole in parts of a fuel cell stack that allows for quality assurance of the fuel cell stack and prevents defective parts from being used, by examining each fuel stack part, which largely influence the quality of the fuel cell stack, using an X-ray device and a vision system, in order to determine the presence of a pin hole in the parts, and a method thereof.