Patent application number | Description | Published |
20110086292 | JOINING DEVICE FOR FUEL CELL STACK AND FUEL CELL STACK PROVIDED WITH THE SAME - The present invention features a fuel cell stack that preferably includes an electricity generating assembly having a plurality of unit cells that are suitably disposed one after another; a pair of end plates pressedly disposed respectively at upper and lower ends of the electricity generating assembly; and a joining device suitably engaging the end plates by a rope, where pressure is applied to the electricity generating assembly by means of tension of the rope, and the length and tension of the rope is suitably controlled. | 04-14-2011 |
20120140880 | SYSTEM FOR DETECTING PIN HOLE OF FUEL CELL STACK PARTS - 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. | 06-07-2012 |
20130266891 | JOINING DEVICE FOR FUEL CELL STACK AND FUEL CELL STACK PROVIDED WITH THE SAME - The present invention features a fuel cell stack that preferably includes an electricity generating assembly having a plurality of unit cells that are suitably disposed one after another; a pair of end plates pressedly disposed respectively at upper and lower ends of the electricity generating assembly; and a joining device suitably engaging the end plates by a rope, where pressure is applied to the electricity generating assembly by means of tension of the rope, and the length and tension of the rope is suitably controlled. | 10-10-2013 |
20140038068 | METHOD FOR RECOVERING PERFORMANCE OF FUEL CELL - Disclosed is a method for recovering performance of a fuel cell, which can recover the catalytic properties of a cathode in a reusable state by supplying hydrogen to the cathode of a degraded fuel cell stack for a predetermined period of time and storing the fuel cell stack for a predetermined period of time such that an oxide formed on the surface of platinum (Pt) is removed and, at the same time, the platinum is re-precipitated. | 02-06-2014 |
20140119499 | PINHOLE DETECTION SYSTEM OF FUEL CELL - 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 Group 1 or Group 2 according 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. | 05-01-2014 |
20140170510 | SYSTEM AND METHOD FOR RECOVERING PERFORMANCE OF FUEL CELL - A method for recovering performance of a degraded polymer electrolyte fuel cell stack through electrode reversal. In detail, oxide films formed on the surface of platinum of a cathode is removed through an electrode reversal process that creates a potential difference between an anode and the cathode by supplying air to the anode instead of hydrogen and supplying a fuel to the cathode instead of air, thus rapidly recovering the performance of a degraded polymer electrolyte fuel cell stack. | 06-19-2014 |
20150104721 | PERFORMANCE RECOVERY METHOD FOR FUEL CELL STACK - A method for recovering the performance of a fuel cell stack mounted within a vehicle is provided. A method includes a recovery process of continuously applying a predetermined load using a load device when an air supply is stopped and hydrogen is supplied to a fuel cell stack to output current from the fuel cell stack. Further, protons and electrons generated by hydrogen oxidation reaction at an anode are moved to a cathode, to produce hydrogen at the cathode and simultaneously remove oxide on the catalyst surface of the cathode. | 04-16-2015 |
20150357660 | PINHOLE DETECTION SYSTEM OF FUEL CELL - 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. | 12-10-2015 |