Hyundai Motor Company

Kia Motors Corporation

Keun Je Lee

Sang Yeoul Ahn

Sung Keun Lee

Byung Ki Ahn

Tae Won Lim

Bo Ki Hong

Kook Il Han

Sang Hyun Cho

Byeong Heon Jeong

Jea Suk Park

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 &#x3bc;m at 25 kPa and a thickness of 170 to 250 &#x3bc;m at 1 MPa, a density of 0.20 to 0.60 g/cmat 25 kPa, a porosity of 50 to 90% measured by mercury intrusion, and a through-plane electrical resistance of 30 m&#x3a9;&#xb7;cmor lower measured at a clamping pressure of 1 MPa.

Gas diffusion layer for fuel cell vehicle with improved operational stability

A pinhole detection system of a fuel cell element unit including a density measurement module that calculates a density of a fuel cell element unit using weight and volume data measured from electronic weight balance and 3D scan type volume integrator. Photon energy ranges of X-ray beam and window species of the pinhole detection system automatically are selected from Groupor Groupaccording to the density reference point for a fuel cell element, and a stage on which a fuel cell element unit is disposed to be detected. A drive portion that moves the stage to rotate the fuel cell element unit. An X-ray source is disposed at one side of the stage to apply X-ray to the fuel cell element unit that rotates. An image detector detects an X-ray penetrating the fuel cell element unit, and a computer tomography that reconstructs a three dimensional tomogram.

Pinhole detection system of fuel cell

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.

System for detecting pin hole of fuel cell stack parts

Growing community of inventors

Gyeonggi-do, South Korea

Keun Je Lee