KEY PATENTS
ELECTROPHORETIC-DEPOSITED SURFACES
2015-08-04
Young Soo Joung, Cullen R. Buie, US Patent: US9096942
A method of altering a property of a surface Includes suspending a plurality of low surface, energy particles in a solvent, agglomerating the suspension of particles, and subjecting the suspension of particle agglomerates to electrophoretic deposition onto a substrate for a predetermined time. The altered surface may be superhydrophilic or superhydrophobic.
FUEL CELL SYSTEM HAVING FUEL CIRCULATION STRUCTURE, METHOD OF OPERATING THE SAME, AND ELECTRONIC APPARATUS INCLUDING THE FUEL CELL SYSTEM
Young Soo Joung, Hye-jung Cho, Sang-Ho Yoon, US Patent: US8993196
In a fuel cell system including a fuel cartridge and a fuel supply module, the fuel cartridge includes at least two ports, wherein a first port from among the at least two ports is a fuel inlet port and a second port from among the at least two ports is a fuel outlet port. The fuel cartridge may also include a fuel pouch or the fuel cartridge itself may be the fuel pouch. The fuel supply module may include a fuel circulation structure that circulates the fuel before the fuel is supplied to the stack. The fuel cell system may be equipped with an electronic apparatus and serve as a source of power.
2015-03-31
FUEL CELL SYSTEM
2014-05-27
Seong Kee Yoon, Young Soo Joung, Jung Kurn Park, Hye Jung Cho, In Seob Song, US Patent: US8735008
A fuel cell system includes: a fuel supply unit supplying a fuel; an air supply unit supplying air; a stack including a membrane electrode assembly (MEA) having an air path and a fuel path; a gas-liquid separator connected to an outlet of the fuel path and an outlet of the air path for separating gas-liquid into high-temperature liquid and moisture gas; a mixer mixing the high-temperature liquid separated by the gas-liquid separator and a fuel supplied from the fuel supply unit and connecting the gas-liquid separator and the MEA; a moisture absorbent connected to the gas-liquid separator to absorb condensed liquid in the high-temperature moisture gas; and a heat exchanger to vaporize the liquid absorbed by the moisture absorbent.
RECYCLER FOR DIRECT METHANOL FUEL CELL AND METHOD OF OPERATING THE SAME
2014-05-13
Young Soo Joung, Hye Jung Cho, US Patent: US8722261
Note: Strategic Patent Designation from Fuel Cell Group of SAIT
A recycler for a direct methanol fuel cell (DMFC) that uses methanol as a direct feed fuel includes: a housing in which a gas-liquid mixture recovered from a stack is accommodated; a rotor rotatably mounted in the housing; and a motor to rotate the rotor, wherein, when the rotor is rotated by the motor, a phase separation occurs such that liquid in the gas-liquid mixture is collected mainly in an outer region of the housing and gas is collected in the center region of the housing due to the centrifugal force. Accordingly, as it is unnecessary to align a liquid outlet port of the housing with a gravitational direction, the recycler can be employed in a mobile apparatus whose orientation occasionally changes. Also, the recycler does not use a membrane whose performance is rapidly reduced over time so that effective performance can be maintained for a long operation time.
POWER UNIT AND CARTRIDGE, AND FUEL CELL SYSTEM COMPRISING POWER UNIT AND CARTRIDGE
2014-05-13
Hye Jung Cho, Young Soo Joung, Hyuk Chang, US Patent: US872228
Note: Registered in Standards - IEC TC 105 WG#10; International Electrochemical Commission (IEC), Technical Committee No.105 (TC105) – Fuel cell Technologies, Working Group #10, Portable Fuel Cell Appliance – Interchangeability.
Aspects of the present invention provide a power unit and/or a cartridge of a fuel cell system, which may secure against fuel leakage, may ensure operational safety, and may ensure coupling safety
FUEL BATTERY SYSTEM AND FUEL BATTERY OPERATION METHOD
2014-04-08
Jae Yong Lee, Hye Jung Cho, Young-Jae Kim, Hu Lei, Young Soo Joung, US Patent: US8691455
To provide a fuel battery system and a fuel battery operation method using it. The fuel battery system for supplying power to a load is provided with a fuel battery equipped with at least one unit cell, an open/close switch with its one end and the other end connected to different electrodes of the fuel battery, and a circuit part controlling a switch operation, and the fuel battery operation method uses the above. The fuel battery is provided with a plurality of unit cells connected in series, an end of the switch being connected to an anode of the first unit cell of the plurality of unit cells, and the other end being connected to a cathode of the last unit cell. Further, a converter, a secondary battery, a battery charging apparatus and a switching means are provided between the load and the fuel battery.
FUEL CELL SYSTEM
2013-07-09
Seong Kee Yoon, Young Soo Joung, Jung Kurn Park, Hye Jung Cho, In Seob Song, US Patent: US8481221
A fuel cell system includes: a fuel supply unit supplying a fuel; an air supply unit supplying air; a stack including a membrane electrode assembly (MEA) having an air path and a fuel path; a gas-liquid separator connected to an outlet of the fuel path and an outlet of the air path for separating gas-liquid into high-temperature liquid and moisture gas; a mixer mixing the high-temperature liquid separated by the gas-liquid separator and a fuel supplied from the fuel supply unit and connecting the gas-liquid separator and the MEA; a moisture absorbent connected to the gas-liquid separator to absorb condensed liquid in the high-temperature moisture gas; and a heat exchanger to vaporize the liquid absorbed by the moisture absorbent.
DIRECT METHANOL FUEL CELL SYSTEM
2013-06-25
Young Soo Joung, Young Sung Na, Hye Jung Cho, US Patent: US8470487
A fuel cell system according to exemplary embodiments of the present invention includes a fuel cell stack that generates electrical energy through the electrochemical reaction of fuel and oxidant, a fuel supply unit for supplying the fuel to the fuel cell stack, and an oxidant supply unit for supplying the oxidant to the fuel cell stack. The fuel supply unit includes a fuel permeation membrane between a space where fuel recovered from the fuel cell stack is positioned and a space where stored fuel is positioned. The fuel cell system enables easy control of the concentration of fuel supplied to the fuel cell stack.
FUEL CELL SYSTEM AND RECOVERY UNIT FOR FUEL CELL SYSTEM
2013-04-17
Young Soo Joung, Hye Jung Cho, Jung Kurn Park, In Seob Song, Seong Kee Yoon, China Patent: CN101807706
A fuel cell system includes: a fuel cell stack for generating electrical energy by reacting oxidant and mixed fuel, and for discharging non-reacted fuel, oxidant, moisture, and carbon dioxide; a mixer for preparing the mixed fuel by mixing at least a portion of the non-reacted fuel, oxidant and moisture with concentrated fuel and for supplying the mixed fuel to the fuel cell stack; a fuel supply unit for supplying the concentrated fuel to the mixer; an oxidant supply unit for supplying the oxidant to the fuel cell stack; a first heat exchanger between an outlet of the fuel cell stack and the mixer; and a second heat exchanger between the mixer and an inlet of the fuel cell stack.
FUEL CELL SYSTEM: A NEW FUEL MANAGEMENT SYSTEM
2013-02-20
Young Seung Na, In Seob Song, Young Soo Joung, Mi Jeong Song, Hye Jung Cho, China Patent: CN101853957, (2013-02-20).
The present invention has been made in an effort to provide a fuel cell system having an advantage of stably supplying fuel with low power. According to a first aspect of the invention, there is provided a fuel supply unit for a fuel cell system. The fuel supply unit includes a concentration control unit comprising: a fuel storage chamber configured to provide a stored fuel; a recovered fuel passage member configured to allow passage of a recovered fuel; and a fuel permeation membrane positioned between the fuel storage chamber and the passage member, the fuel permeation membrane being made of a material which is permeable for the stored fuel by diffusion.
FUEL CELL CARTRIDGE HAVING RESIDUAL FUEL MEASURING UNIT AND METHOD OF MEASURING RESIDUAL FUEL OF FUEL CELL SYSTEM HAVING THE SAME
Hye Jung Cho, Young Jae Kim, Young Soo Joung, Jae Yong Lee, US Patent # US8349487
A fuel cell cartridge includes a fuel pouch to store fuel, the fuel pouch including a fuel outlet; a pressing unit to press the fuel pouch; a variable resistor provided near the fuel pouch; a sensor provided on the pressing unit to read a resistance value of the variable resistor; and a contact pad to transmit an output voltage determined by the resistance value outside the fuel cell cartridge.
2013-01-08
HYBRID VOLTAGE SUPPLY APPARATUS, METHOD OF CONTROLLING THE SAME, AND ELECTRONIC SYSTEM EMPLOYING THE SAME AS POWER SUPPLY
Hu Lei, Young Jae Kim, Hye Jung Cho, Jae Yong Lee, Young Soo Joung, US Patent: US8153313
A hybrid voltage supply apparatus, a method of controlling the same, and an electronic system employing the hybrid voltage supply apparatus as a power supply are provided. The hybrid voltage supply apparatus includes a hybrid voltage supply apparatus including a main power supply, an auxiliary power supply, and a first voltage adjustment unit which operates in any one of a feed-forward driving mode and a feed-back driving mode according to at least one operating parameter of the main power supply, and adjusts an output voltage of the main power supply to a first predetermined DC voltage.
2012-04-10
FUEL CELL SYSTEM AND METHOD OF OPERATING THE SAME
2011-12-07
Young Jae Kim, Lee Jae Yong, Jin Ho Kim, Hye Jung Cho, Hu Lei, Young Soo Joung, China Patent: CN101165958
A fuel cell system to rapidly increase the temperature of unit cells. The fuel cell system includes; a plurality of current generating unit cells; a load circuit to supply the current to a load; a short circuit to connect the cells to an electrically closed loop without passing through the load; a thermo sensor to measure the temperature of the cells, and a controller that controls the delivery of the current to the load circuit and the short circuit, according to the temperature measured by the thermo sensor. The fuel cell system can rapidly increase the temperature of the unit cells when the temperature of the unit cells is below an operating temperature, thereby reducing the time required for the fuel cell to generate a stable output voltage.
FUEL CELL SYSTEM HAVING PRESSURIZING SYSTEM
2011-09-06
Young Soo Joung, Hye Jung Cho, Jae Yong Lee, Young Jae Kim, US Patent #: US8012649
A fuel cell system having a fuel pressurizing system. The fuel cell system includes: a cartridge comprising a fuel storage pack; a main body; and a pressurizing unit disposed in the main body to pressurize the fuel storage pack when the cartridge is mated to the main body. The cartridge further includes a pressurizing plate to transmit pressure received from the pressurizing unit to the fuel storage pack when the cartridge is mated to the main body and to preventing the fuel storage pack from being pressurized when the cartridge is separated from the main body. The main body can include a case on which the fuel storage pack and the pressurizing plate are received.