Patent application number | Description | Published |
20080254332 | FUEL CELL STACK AND MANUFACTURING METHOD OF THE SAME - A fuel cell stack includes a membrane electrode assembly including an anode electrode, a cathode electrode, and an electrolyte membrane positioned between the anode electrode and the cathode electrode; a separator including a channel for a flow of fuel and oxidant and closely adhered to the membrane electrode assembly; and a gasket with a two-layer structure stacked between the separator and the membrane electrode assembly. | 10-16-2008 |
20080268316 | Fuel cell stack and manufacturing method thereof - A fuel cell stack and a manufacturing method thereof are disclosed. In one embodiment, the fuel cell stack includes: i) a membrane electrode assembly configured of an anode electrode, a cathode electrode, and a polymer electrolyte membrane positioned therebetween, ii) a first plate including a fuel flow channel facing the anode electrode and contacting the anode electrode and iii) a second plate including an oxidant flow channel facing the cathode electrode and contacting the cathode electrode, wherein the membrane electrode assembly, the first bipolar plate, and the second bipolar plate each includes a stack direction display parts, which are arranged in a line. At least one embodiment of the invention is capable of preventing an anode surface and a cathode surface of a part from being reversely stacked in manufacturing a stack type fuel cell. | 10-30-2008 |
20080274389 | CATHODE END PLATE AND BREATHABLE FUEL CELL STACK USING THE SAME - A cathode end plate for a breathable fuel cell stack including a first plate including a plurality of first openings and a second plate contacting one side of the first plate and including a plurality of second openings exposing two or more first openings of the plurality of first openings. | 11-06-2008 |
20080280183 | END PLATE FOR FUEL CELL STACK AND AIR BREATHING FUEL CELL STACK USING THE SAME - An end plate of an air breathing fuel cell stack and an air breathing fuel cell stack including the same. The air breathing fuel cell stack includes a membrane electrode assembly, including an anode electrode, a cathode electrode, and an electrolyte positioned between the anode electrode and the cathode electrode; and an end plate contacting the membrane electrode assembly. The end plate includes a first surface contacting the membrane electrode assembly, an opposing second surface; and a collector positioned at the first surface and contacting the cathode electrode. | 11-13-2008 |
20080292927 | Humidity controllable cathode end plate and air breathing fuel cell stack the same - The present embodiments relate to a humidity controllable cathode end plate and an air breathing fuel cell stack using the same capable of preventing stack performance degradation due to the dryness of a cathode and a membrane. The air breathing fuel cell stack according the present embodiments including: a membrane electrode assembly configured of an anode, a cathode, and an electrolyte membrane positioned between the anode and the cathode; a fuel supply unit coupled to the anode to supply fuel; and a cathode end plate coupled to the cathode so that the humidity of the cathode is maintained and including a first opening part for influxing ambient air and a second opening part for outfluxing the ambient air. | 11-27-2008 |
20090011317 | FUEL CELL SYSTEM AND FUEL CARTRIDGE HAVING FUEL BUFFER MODULE - Disclosed is a fuel cartridge. The fuel cartridge according to the present disclosure comprises a fuel container having a first port configured to flow fuel therethrough; and a buffer module configured to be coupled to the fuel container, wherein the buffer module comprises a second port configured to engage with the first port, a tubing connection comprising a first and a second end, wherein the first end is coupled to or forms the second port, a third port coupled to or formed by the second end of the tubing connection, and a buffer container in fluid communication with the second and third ports via the tubing connection, wherein the buffer container is configured to store fuel therein when an inflow of the fuel to the buffer module is greater than an outflow from the buffer module. | 01-08-2009 |
20090123808 | FUEL CELL STACK - The present disclosure relates to a fuel cell stack capable of making fuel flow within the stack uniform. One embodiment of the present disclosure is configured to provide a fuel cell stack comprising: a stack comprising a plurality of fuel cells disposed in a stack body, a fuel manifold in the stack body fluidly connected to the plurality of fuel cells, an oxidant manifold in the stack body fluidly connected to the plurality of fuel cells, and a baffle disposed in the fuel manifold comprising a longitudinal recess wherein a cross-section of the recess reduces in one direction. | 05-14-2009 |
20100136377 | FUEL CELL SYSTEM AND DRIVING METHOD THEREOF - A method of driving a fuel cell system according to embodiments of the present invention includes supplying a first amount of oxidizer (which is less than a normal amount of oxidizer) to a fuel cell stack while continuously supplying fuel to the fuel cell stack, supplying a second amount of oxidizer (which is more than the normal amount) to the fuel cell stack, and supplying a third amount of oxidizer (which is the normal amount of oxidizer supplied in a normal driving state) to the fuel cell stack. | 06-03-2010 |
20100159296 | Fuel cell system and driving method thereof - Disclosed are a fuel cell system, and a method of driving the system. The fuel cell system includes a fuel cell stack having a plurality of unit cells producing electricity, a switching unit connecting the plurality of unit cells to a discharge resistor, a switching controller synchronously operated when the voltage of the fuel cell stack reaches an open circuit voltage after power generation of the fuel cell stack is stopped. The switching controller generates select control signals to control the switching unit. The fuel cell system further includes a sensing unit measuring respective cell voltages of the plurality of unit cells and generating cell voltage sensing signals to control activation periods of the select control signals. | 06-24-2010 |
20100178581 | FUEL CELL STACK AND FUEL CELL SYSTEM USING THE SAME - A fuel cell stack and a fuel cell system using the same are disclosed. The fuel cell stack may include an electricity generation unit generating electrical energy by an electrochemical reaction of fuel and oxidizer. The fuel cell stack may include a regulation member made of porous materials to disperse coolant flowed in through a cooling channel formed in the fuel cell stack. | 07-15-2010 |
20100239922 | FUEL CELL SYSTEM AND METHOD OF DRIVING THE SAME - A fuel cell system and a method for driving the fuel cell system are disclosed. In one aspect, the fuel cell system may include a fuel stack, a fuel supply unit, an oxidizer supply unit, a humidifying unit, and a controller configured to measure the temperature of unit cells within the fuel cell stack and configured to detect the lowest measured temperature. The fuel cell stack may include a membrane electrode assembly and a plurality of unit cells. The membrane electrode assembly may include a membrane, a cathode disposed at a first side of the membrane and an anode disposed at a second side of the membrane. In another aspect, a method of driving a fuel cell system may include sequentially supplying a humidified fuel and an oxidizer to a fuel cell stack, measuring the temperature of each of a plurality of unit cells in the fuel cell stack, detecting to detect a unit cell having the lowest temperature among the measured temperature of each of the plurality of unit cells and decreasing humidification temperature of the fuel to be lower than the lowest temperature. | 09-23-2010 |