Patent application number | Description | Published |
20080253940 | CARBON MONOXIDE TREATMENT APPARATUS FOR FUEL CELL - A carbon monoxide treatment apparatus according to an exemplary embodiment of the present invention includes: a reactor body; a partitioning plate located inside the reactor body for partitioning an internal space of the reactor body into a first section and a second section; a channel member in the first section for transporting an introduced gas including a reformed gas and an oxidant gas to the second section; and a reaction unit around the channel member of the first section for reducing a concentration level of carbon monoxide in the introduced gas moving through the first section by utilizing a preferential oxidation reaction of the carbon monoxide and the oxidant gas of the introduced gas, wherein moisture of the introduced gas that has been partially condensed when passing through the channel member is stored in the second section. | 10-16-2008 |
20080299440 | FUEL CELL STACK - A planar fuel cell stack, having generators that generate electricity by an electrochemical reaction of a fuel and an oxidizing agent, the generators arranged on a same plane. A beading unit and a protruding portion are formed on a fastening plate and a separator so as to improve structural stiffness thereof. Accordingly, the constituent elements of the stack are fastened with a substantially uniform conjoining pressure compared to a conventional planar stack, and the thickness of the stack of the present invention can be thinner than that of the conventional planar stack. | 12-04-2008 |
20090208788 | Fuel cell system - A fuel cell system includes a reformer for generating hydrogen gas from fuel containing hydrogen using a chemical catalytic reaction and thermal energy. At least one electricity generator generates electrical energy by an electrochemical reaction of the hydrogen gas and oxygen. A fuel supply assembly supplies fuel to the reformer, and an oxygen supply assembly supplies oxygen to the at least one electricity generator. A heat exchanger is connected to the reformer and to the at least one electricity generator. The heat exchanger supplies thermal energy of the reformer, during initial operation of the system, to the at least one electricity generator so as to pre-heat the at least one electricity generator. | 08-20-2009 |
20100330449 | FUEL CELL SYSTEM AND STACK THEREOF - A fuel cell system includes a fuel supply, an air supply, a plurality of unit cells being stacked, and a stack. The stack includes: a plurality of unit cells, each comprising separators and a membrane assembly (MEA) disposed between the separators; a fuel inlet configured to introduce a fuel to the unit cell; an unreacted fuel outlet configured to emit unreacted fuel from the stack; a fuel bypass path; a fuel distribution path configured to distribute the fuel to each of the unit cells; and an unreacted fuel inducing path configured to channel the unreacted fuel to the unreacted fuel outlet. | 12-30-2010 |
20110039179 | FUEL CELL STACK AND FUEL CELL SYSTEM USING THE SAME - A fuel cell stack that includes: stacked cells that generate electricity; an exchange plate disposed at a first side of the stacked cells, having a channel in fluid communication with an injection flow path and a discharge flow path, which extend between the cells; and a pump that is disposed at an opposing second surface of the stacked cells, to force coolant (air) through the injection flow path, the exchange plate, and the discharge flow path. | 02-17-2011 |
20110143247 | Fuel cell stack and fuel cell system including the same - A fuel cell stack and a fuel cell system, the fuel cell stack including a plurality of membrane electrode assemblies, the membrane electrode assemblies being configured to generate electrical energy by an electrochemical reaction of a fuel and an oxidizer; and a plurality of bipolar plates positioned adjacent to the membrane electrode assemblies and between the membrane electrode assemblies, the bipolar plates including a fuel channel at one side thereof and an oxidizer channel at a second, opposite side thereof, wherein the bipolar plates include a plurality of cooling channels penetrating therethrough, the cooling channels having a curvature along a length thereof. | 06-16-2011 |
20110236775 | Fuel Cell System - A fuel cell system quickly and efficiently preheats a frozen stack. The fuel cell system includes: a reformer which generates a reformate gas by reforming a fuel and is heated by a heat source unit; a stack which generates electricity by electrochemically reacting an oxidizer with hydrogen in the reformate gas; and a fluid flow controller which moves air around the reformer into an area around the stack, and which controls airflow on the basis of a temperature change of the stack, wherein the air is heated by the surface temperature of the reformer. | 09-29-2011 |
20110236777 | FUEL CELL SYSTEM TO PREHEAT FUEL CELL STACK - A fuel cell system including: a reformer to convert a fuel into hydrogen; a reformer chamber to contain air heated by the reformer; a fuel cell stack to convert the hydrogen into electricity; a first pump to supply an oxidant to the stack; and a second pump to supply the heated air to the stack, to preheat the stack. The system may also include a controller to control the operation of the system, such that the heated air is not supplied until it reaches a predetermined temperature, and the oxidant is not supplied and the stack is not operated, until the stack reaches a predetermined temperature. | 09-29-2011 |
20110244342 | FUEL CELL SYSTEM - The fuel cell system includes a fuel cell stack, a fuel supply supplying a fuel to the fuel cell stack, and an oxidizing agent supply supplying an oxidizing agent to the fuel cell stack. The fuel cell stack includes a first end plate, a moisture exchanger, an electrical generator, and a second end plate. The moisture exchanger includes a first area where a dried supply oxidizing agent flows, a second area where a humid emission fuel flows, and a third area where a humid emission oxidizing agent flows, and the first area exchanges moisture with the second and third areas using a moisture exchange layer. | 10-06-2011 |
20110305965 | Stack for fuel cell system - A stack for a fuel cell system, including: a membrane electrode assembly, a separator that includes a fuel passage that supplies a fuel to an anode electrode of the membrane electrode assembly and an oxidant passage that supplies an oxidant to a cathode electrode of an adjacent membrane electrode assembly, a first manifold that is formed by connecting first penetration holes that penetrate the separator in a stacking direction and that is connected to the fuel passage, a second manifold that is formed by connecting second penetration holes that penetrate the separator in the stacking direction and that is connected to the oxidant passage and a baffle that is disposed in at least one of the first manifold and the second manifold. The baffle has a membrane structure to control the fluid flow inside of the at least one of the first manifold and the second manifold. | 12-15-2011 |
20110305967 | FUEL CELL STACK - A fuel cell stack including a plurality of membrane-electrode assemblies, a plurality of separators in close contact with the membrane-electrode assemblies between the membrane-electrode assemblies, and gaskets provided on the separators. Each of the separators includes an anode separator having first through holes and a cathode separator in contact with the anode separator and having the second through holes. Each of the gaskets includes a penetrating portion filled in the first through holes and penetrating the anode separator and the cathode separator and a sealing portion coupled to the penetrating portion and protruding from outer surfaces of the anode and cathode separators in a thickness direction of the anode separator and the cathode separator. | 12-15-2011 |
20110305968 | FUEL CELL STACK - A fuel cell stack includes: a plurality of membrane-electrode assemblies; first and second end plates respectively positioned outside outermost ones of the membrane-electrode assemblies; and a plurality of separators respectively positioned between the membrane-electrode assemblies and between the outermost ones of the membrane-electrode assemblies and the first and second end plates. The first end plate includes an oxidizing agent inlet, an oxidizing agent outlet, and a moisture supplying flow path connecting the oxidizing agent inlet and the oxidizing agent outlet. The moisture supplying flow path includes a first end portion adjacent to the oxidizing agent outlet and a second end portion adjacent to the oxidizing agent inlet, the first end portion being larger than the second end portion and being a different distance away from a surface of the first end plate facing away from the second end plate than the second end portion. | 12-15-2011 |
20120028138 | FUEL CELL SYSTEM AND DRIVING METHOD FOR THE SAME - A fuel cell system includes a fuel cell stack that includes a plurality of unit cells, each including a membrane-electrode assembly including an electrolyte membrane, a cathode at one side of the electrolyte membrane, and an anode at an opposite side of the electrolyte membrane, and separators at respective sides of the membrane-electrode assembly, a fuel supply for supplying a fuel to the fuel cell stack, an oxidizing agent supply for supplying an oxidizing agent to the fuel cell stack, and a controller for controlling operation of the fuel supply and the oxidizing agent supply, for measuring a voltage of each of the unit cells, and for turning off a load coupled to the fuel cell stack after determining that the voltages of the unit cells reached a reference voltage. | 02-02-2012 |
20130004873 | FUEL CELL SYSTEM AND DRIVING METHOD THEREOF - A fuel cell system and a method for driving a fuel cell system are disclosed. The fuel cell system includes a fuel cell stack with a plurality of unit cells, a temperature measurer configured for determining a temperature of the fuel cell stack, a cell voltage measurer configured for determining voltages of one or more of the plurality of unit cells, and a control unit configured for monitoring the unit cell voltages of the plurality of unit cells to detect a minimum unit cell voltage when a measured temperature of the fuel cell stack is below zero, and configured for controlling the load current so that the detected minimum unit cell voltage may be maintained at a predetermined threshold voltage. | 01-03-2013 |
20130078545 | FUEL CELL STACK - A fuel cell stack is disclosed. The fuel cell stack includes a membrane electrode assembly, separation plates on either side of the membrane electrode assembly, current collectors on either side of the separation plates and configured to electrically convey current to an outside circuit, first and second end plates sandwiching the current collectors and configured to apply a connecting pressure, and manifolds formed to pass through the membrane electrode assembly, at least one of the separation plates, at least one of the current collectors, and at least one of the end plates, the manifolds configured to conduct reaction gas, and cutoff blocks inserted into a portion forming manifolds of the end plates to separate the current collectors and the end plates on a passage in which the reaction gas is circulated. | 03-28-2013 |