Patent application number | Description | Published |
20090017745 | Ventilation apparatus for fuel cell vehicle - The present invention provides a ventilation apparatus for a fuel cell vehicle, which can rapidly remove high-temperature air generated in the inside of a stack case by moving the same to an air cleaner using a suction pressure of air supplied for the operation of the fuel cell vehicle, reduce the risk incurred due to hydrogen leakage by moving leaking hydrogen to the air cleaner, and maintain the temperature of a fuel cell stack constant. | 01-15-2009 |
20090214928 | Fuel cell stack of fuel cell vehicle - The present invention provides a method of assembling a fuel cell stack, in which a fixing block and a fixing pin are used to assemble the fuel cell stack instead of a bolt, thereby reducing the time and process required for assembly of the fuel cell stack, enabling an assembly process using an automated device to be realized, and facilitating mass production. | 08-27-2009 |
20100279206 | Sealing structure of fuel cell separator - The present invention provides a sealing structure of a sealing portion for maintaining the airtightness of a coolant passage in two stacked separators of a fuel cell, wherein a groove in which an adhesive is to be filled is formed on a surface of one of two separators, and dam portions are formed on both sides of the groove to prevent the adhesive applied in the groove from overflowing into a connection passage and a coolant passage. Accordingly, the adhesive overflowing from the groove when the two separators are bonded to each other by applying a pressure is collected in the dam portions to form three sealing lines, thus improving the airtightness of the sealing portion. Moreover, it is possible to solve the problem that the performance of the fuel cell stack is deteriorated when an antifreeze/coolant leaks from the coolant passage to an MEA, in which the fuel cell reaction takes place, or the leaking coolant contaminates a catalyst of the MEA. | 11-04-2010 |
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 |
20120070760 | LOCAL HYDROPHILIC GAS DIFFUSION LAYER AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment. | 03-22-2012 |
20120094197 | HUMIDIFIER FOR FUEL CELL AND FUEL CELL SYSTEM USING THE SAME AS AUXILIARY HUMIDIFIER - The present invention provides a humidifier, which is used as an auxiliary humidifier of a fuel cell together with an existing gas-to-gas humidifier to improve humidification performance in a low efficiency region of the gas-to-gas humidifier, thus increasing the output of the fuel cell and providing high efficiency operation. Particularly, the humidifier comprises: an inlet assembly provided in an air exhaust pipe, through which water-supersaturated exhaust gas is discharged from a fuel cell stack, to supply water condensed from the exhaust gas to the fuel cell stack; an outlet assembly provided in an air supply pipe, through which a reactant gas to be humidified and supplied to the fuel cell stack passes, to supply the water transferred through a pumping pipe to the air supply pipe such that the reactant gas is humidified; and a pumping pipe including a porous material disposed therein and electrodes for applying a voltage to both ends of the porous material and disposed between the inlet assembly and the outlet assembly such that the water is transferred through a capillary path in the porous material with a pumping force by electroosmosis when the electrodes apply a voltage. | 04-19-2012 |
20120100410 | FUEL CELL SEPARATOR - The present invention provides a fuel cell separator, in which a vortex generating structure is formed on the surface of a channel of the separator to induce a vortex of fluid (i.e., hydrogen and air) flowing through the channel, thus facilitating the supply of reactant gases and the removal of water droplets from a gas diffusion layer (GDL). | 04-26-2012 |
20120122008 | MANIFOLD INSERT HAVING DISTRIBUTION GUIDES AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a manifold insert having a plurality of distribution guides which reduce output voltage deviation due to flow instability between unit cells and prevent local flow instability of electrodes by stably distributing the flow of fluid (such as air, hydrogen, and coolant) supplied to a fuel cell stack, thereby maintaining a stable performance of the unit cells, and a fuel cell stack comprising the same. In particular, manifold insert having distribution guides is provided, the manifold insert being configured to form a flow field from an inlet port of fluid to an outlet port connected to a fuel cell stack, the manifold insert including: a plurality of distribution guides for dividing the flow field from the inlet port to the outlet port such that the fuel cell stack is divided into a plurality of regions according to the distance from the inlet port, wherein the distribution guides have surfaces that are at least partially curved such that the flow of the fluid from the inlet port to the outlet port is changed by the curved surfaces and form a plurality of guide flow fields for guiding the fluid to the divided regions of the fuel cell stack such that the fluid is supplied to the divided regions of the fuel cell stack along the plurality of guide flow fields at different flow rates. | 05-17-2012 |
20120135327 | MONITORING THE OPERATIONAL STATE OF A FUEL CELL STACK - A technique is described herein for monitoring the operational state of a fuel cell stack by the detection of nonlinearity in such a manner that an external test signal for frequency response is generated and applied to the fuel cell stack during operation, the resulting signal output from the fuel cell stack is measured, and the harmonic content of the measured signal is analyzed, the method including: applying a multiple frequency test signal comprising at least two sinusoidal waves as the test signal for frequency response to the fuel cell stack; and analyzing the resulting current or voltage signal output from the fuel cell stack. | 05-31-2012 |
20130017468 | MANIFOLD BLOCK FOR FUEL CELL STACKAANM Kim; Duck WhanAACI SeoulAACO KRAAGP Kim; Duck Whan Seoul KRAANM Kum; Young BumAACI SeoulAACO KRAAGP Kum; Young Bum Seoul KRAANM Kim; Sae HoonAACI YonginAACO KRAAGP Kim; Sae Hoon Yongin KRAANM Yu; Jung HanAACI YonginAACO KRAAGP Yu; Jung Han Yongin KR - The present invention provides a manifold block for a fuel cell stack, coupled to a fuel cell stack module and having a gas passage and a cooling water passage. The manifold block includes an insulating member and an insulating cover. The insulating member is inserted into the cooling water passage and contacts an inner surface of the cooling water passage. The insulating member has a tube-like shape and electrically insulates the inner surface of the cooling water passage. The insulating cover is inserted into the cooling water passage and contacts an inner surface of the insulating member. The insulating cover fixes and protects the insulating member. | 01-17-2013 |
20130020205 | APPARATUS AND METHOD FOR FORMING OXIDATION LAYER ON MANIFOLD BLOCK FOR FUEL CELL STACK - Disclosed is an apparatus and method for forming an oxidation layer on a manifold block for a fuel cell stack, which forms an oxidation layer uniformly over the entire surface of a long and complicated internal flow field of a manifold block. In particular, the apparatus for forming an oxidation layer on a manifold block for a fuel cell stack includes: an electrolyte bath which contains an electrolyte required for the formation of the oxidation layer, an electrode for supplying a required electron flow for the formation of the oxidation layer from a power supply to the manifold block immersed in the electrolyte of the electrolyte bath and to the electrolyte, and an air supply for supplying oxygen to the electrolyte. Even more particularly, the electrode connected to the electrolyte is inserted into each internal flow field of the manifold block to provide an effective electron flow therein. | 01-24-2013 |
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 |
20130295481 | MANIFOLD BLOCK FOR FUEL CELL STACK - Disclosed is a manifold block for a fuel cell, which provides excellent electrical insulation for a coolant flow channel in an internal flow channel. More specifically, a manifold block for a fuel cell stack, includes a coolant interface formed of a polymer insulating material and coolant flow channels; and a reactant gas interface formed of a metal material and including reactant gas flow channels. In particular, the reactant and coolant interfaces are mounted to a stack module and, at the same time, are integrally bonded to each other. | 11-07-2013 |
20130295482 | HYDROGEN SUPPLY SYSTEM FOR FUEL CELL WITH INTEGRATED MANIFOLD BLOCK - Disclosed is a hydrogen supply system for a fuel cell, which has an integrated manifold block in which components for hydrogen supply are integrated and modulated. In particular, a hydrogen supply line, a hydrogen discharge line, and a hydrogen recirculation line are formed in a manifold block mounted on the outside of a plurality of stack modules of a fuel cell stack. Additionally, components of the hydrogen supply system including components for supplying and discharging hydrogen and components for recirculating hydrogen are integrally mounted in predetermined positions of the hydrogen supply line, the hydrogen discharge line, and the hydrogen recirculation line to modularize the manifold block and the components of the hydrogen supply system. | 11-07-2013 |
20130302723 | LOCAL HYDROPHILIC GAS DIFFUSION LAYER AND FUEL CELL STACK COMPRISING THE SAME - The present invention provides a local hydrophilic gas diffusion layer configured to enhance the water removal performance of a fuel cell For this purpose, the present invention provides a gas diffusion layer in which a region under each of a pair of lands, which receives a clamping pressure of the fuel cell stack, is subjected to local hydrophilic treatment by a simple process, thereby enhancing the water removal performance of the fuel cell stack. In particular, the local hydrophilic gas diffusion layer has a first region under each land of the separator which receives the clamping pressure; and a second region under the gas channel of the separator, wherein the first region is subjected to hydrophilic treatment. | 11-14-2013 |
20130316560 | CELL VOLTAGE MEASURING CONNECTOR FOR FUEL CELL STACK - A connector that may be prevented from detaching from separating plates of a stack even when vibrations or an external impact of a vehicle occurs by maintaining a locking state in which locking bosses of a CPA are inserted into lock grooves of terminals of separating plates. In addition, connecting points of connecting pieces of connecting terminals are spaced apart to not contact each other with respect to a contact line. The connecting terminals are not detached from the separating plates even when the separating plates is a ultra-slim film having a thickness of about 0.1 mm or less, making it possible to increase a reliability of a product. | 11-28-2013 |
20140158281 | METHOD FOR MANUFACTURING MANIFOLD FOR FUEL CELL - A method for manufacturing a manifold for a fuel cell with a multilayer structure by injection-molding individual manifolds, each having welding projections and welding guides, and bonding the injection-molded individual manifolds by vibration welding includes arranging welding projections of an upper individual manifold and welding guides of a lower individual manifold to be engaged with each other while maintaining a uniform gap between each other to bond a plurality of individual manifolds in an up and down stacking structure, pressing the lower individual manifold upward, and applying vibration to the upper individual manifold in the left and right direction, thus bonding the upper and lower individual manifolds. Among the welding projections of the upper individual manifold, a non-horizontal welding projection whose longitudinal direction does not coincide with the vibration direction of the individual manifold has a variable height. | 06-12-2014 |
20140162157 | APPARATUS FOR DIAGNOSING FAULT OF FUEL CELL STACK - A failure diagnosis apparatus that includes an alternating current (AC) absorption unit that is connected to the fuel cell stack and switched based on an applied AC signal to enable a current from the fuel cell stack to flow. In addition, an AC signal generator is configured to generate the AC signal and supply the generated AC signal to the AC absorption unit. As the current from the fuel cell stack is absorbed by the AC absorption unit based on an alternating signal, a stack current input into a diagnosis processing unit includes an AC component, thus the diagnosis processing unit may diagnose fuel cell stack failure by analyzing a frequency of the AC component. | 06-12-2014 |
20140186746 | APPARATUS FOR INSULATING EXPOSED CHARGING PART OF FUEL CELL STACK - An apparatus for insulating a plurality of exposed live parts of a fuel cell stack, includes a plurality of protectors. Each of the plurality of protectors is made of an insulating material and configured to insulate a corresponding one of the plurality of exposed live parts to which a corresponding one of current collector terminals disposed in an end plate of the fuel cell stack and a corresponding one of connections of a busbar are connected. | 07-03-2014 |