Patents by Inventor Se Joon Im

Se Joon Im has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11410813
    Abstract: A semiconductor device includes: a first electrode; a second electrode; and a multi-layered stack including a hafnium oxide layer of a tetragonal crystal structure which is positioned between the first electrode and the second electrode, wherein the multi-layered stack includes: a seed layer for promoting tetragonal crystallization of the hafnium oxide layer and having a tetragonal crystal structure; and a booster layer for boosting a dielectric constant of the hafnium oxide layer.
    Type: Grant
    Filed: May 4, 2020
    Date of Patent: August 9, 2022
    Assignee: SK hynix Inc.
    Inventors: Se-Hun Kang, Han-Joon Kim, Ki-Vin Im
  • Patent number: 10847819
    Abstract: An apparatus for preventing moisture condensation includes a fuel cell stack and an enclosure in which the fuel cell stack is disposed. A heater and a temperature sensor are provided in the enclosure. A controller is configured to control the heater to be turned on when an insulation resistance between the fuel cell stack and the enclosure is less than a preset resistance value. The controller controls the heater not to be turned on when a surface temperature of the enclosure measured by the temperature sensor exceeds a preset temperature.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: November 24, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Jung Han Yu, Jung Do Suh, Ju Han Kim, Duck Whan Kim, Se Joon Im, Young Woo Noh
  • Patent number: 10461348
    Abstract: A fuel cell system and a method of controlling the same are provided. The fuel cell system includes a supplying pipe that supplies hydrogen and air to a stack and a gas concentration sensor that senses hydrogen and air impurities supplied to the supplying pipe. A supplying valve is disposed in the supplying pipe to adjust the hydrogen and air supply and a discharging pipe discharges the hydrogen and the air from the stack. A discharging valve is disposed in the discharging pipe to adjust the discharging of the hydrogen and the air. A controller operates with the gas concentration sensor to detect introduction of the impurities. Exhaust valves are disposed at the front and rear end of the stack to remove a polluted fuel when the impurities are introduced. When performance deteriorates due to the impurities, a cause of deterioration is determined, and stack performance is recovered.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: October 29, 2019
    Assignee: Hyundai Motor Company
    Inventors: Se Joon Im, Jun Yeol Paek
  • Publication number: 20180331377
    Abstract: An apparatus for preventing moisture condensation includes a fuel cell stack and an enclosure in which the fuel cell stack is disposed. A heater and a temperature sensor are provided in the enclosure. A controller is configured to control the heater to be turned on when an insulation resistance between the fuel cell stack and the enclosure is less than a preset resistance value. The controller controls the heater not to be turned on when a surface temperature of the enclosure measured by the temperature sensor exceeds a preset temperature.
    Type: Application
    Filed: July 24, 2018
    Publication date: November 15, 2018
    Inventors: Jung Han YU, Jung Do SUH, Ju Han KIM, Duck Whan KIM, Se Joon IM, Young Woo NOH
  • Patent number: 10062914
    Abstract: An apparatus for preventing moisture condensation includes a fuel cell stack and an enclosure in which the fuel cell stack is disposed. A heater and a temperature sensor are provided in the enclosure. A controller is configured to control the heater to be turned on when an insulation resistance between the fuel cell stack and the enclosure is less than a preset resistance value. The controller controls the heater not to be turned on when a surface temperature of the enclosure measured by the temperature sensor exceeds a preset temperature.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: August 28, 2018
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Jung Han Yu, Jung Do Suh, Ju Han Kim, Duck Whan Kim, Se Joon Im, Young Woo Noh
  • Patent number: 9819034
    Abstract: Disclosed is a stack for simulating a cell voltage reversal behavior in a fuel cell. The stack is configured to have a structure in which a separator of a portion of a plurality of cells in the stack have an inlet of a hydrogen flow field partially blocked to induce hydrogen starvation only in the portion of the plurality of cells.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: November 14, 2017
    Assignee: Hyundai Motor Company
    Inventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im
  • Publication number: 20170170501
    Abstract: A fuel cell system and a method of controlling the same are provided. The fuel cell system includes a supplying pipe that supplies hydrogen and air to a stack and a gas concentration sensor that senses hydrogen and air impurities supplied to the supplying pipe. A supplying valve is disposed in the supplying pipe to adjust the hydrogen and air supply and a discharging pipe discharges the hydrogen and the air from the stack. A discharging valve is disposed in the discharging pipe to adjust the discharging of the hydrogen and the air. A controller operates with the gas concentration sensor to detect introduction of the impurities. Exhaust valves are disposed at the front and rear end of the stack to remove a polluted fuel when the impurities are introduced. When performance deteriorates due to the impurities, a cause of deterioration is determined, and stack performance is recovered.
    Type: Application
    Filed: May 2, 2016
    Publication date: June 15, 2017
    Inventors: Se Joon Im, Jun Yeol Paek
  • Publication number: 20170141418
    Abstract: Disclosed is a stack for simulating a cell voltage reversal behavior in a fuel cell. The stack is configured to have a structure in which a separator of a portion of a plurality of cells in the stack have an inlet of a hydrogen flow field partially blocked to induce hydrogen starvation only in the portion of the plurality of cells.
    Type: Application
    Filed: November 15, 2016
    Publication date: May 18, 2017
    Inventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im
  • Publication number: 20160380281
    Abstract: A device and a method are provided for controlling an operation of a fuel cell system to improve a momentary output of a fuel cell system and decrease a performance deviation between fuel cells. The device momentarily reduces a cell voltage of a fuel cell or changes a fuel cell system to a state close to a shut-down, return the fuel cell system to a normal condition again, and then enable the fuel cell system to be operated normally by applying the “saw-tooth phenomenon” and the “hysteresis phenomenon.” Thus, a momentary output of the fuel cell system is improved to performance of a highest output level or more expressible in a previous state and a performance deviation between fuel cells is decreased.
    Type: Application
    Filed: December 6, 2015
    Publication date: December 29, 2016
    Inventor: Se Joon Im
  • Patent number: 9496566
    Abstract: Disclosed is a stack for simulating a cell voltage reversal behavior in a fuel cell. The stack is configured to have a structure in which a separator of a portion of a plurality of cells in the stack have an inlet of a hydrogen flow field partially blocked to induce hydrogen starvation only in the portion of the plurality of cells.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: November 15, 2016
    Assignee: Hyundai Motor Company
    Inventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im
  • Patent number: 9466846
    Abstract: A fuel cell system is disclosed. More specifically, the fuel cell system may include a stack that includes an electrical generation assembly of a fuel cell, an air supply unit that supplies air to a cathode of the fuel cell, a humidifier that humidifies exhaust air that is exhausted from the cathode and supply air that is supplied from the air supply unit, a hydrogen supply unit that supplies the anode of the fuel cell with hydrogen, and a water trap that traps condensate that is generated by the anode and exhausts it. In particular, the supply air is supplied to an upstream side of the humidifier and the condensate that is trapped in the water trap is supplied to an upstream side of the humidifier.
    Type: Grant
    Filed: June 26, 2012
    Date of Patent: October 11, 2016
    Assignee: Hyundai Motor Company
    Inventors: Hyo Sub Shim, Se Joon Im, HyunJae Lee, Deukkuen Ahn, Jong Hyun Lee
  • Patent number: 9455458
    Abstract: A hydrogen supply apparatus of fuel cell stack is provided. In particular, a plurality of unit cells includes a membrane electrode assembly, a separating plate disposed on two sides of the membrane electrode assembly, a coolant path, an air path, a fuel path, and an air inlet manifold communicated with the air path. An end plate is disposed on each end of the plurality of unit cells and forms an air inlet manifold in a location corresponding to the air inlet manifold of the separating plate. Additionally, a hydrogen supply apparatus is provided in the air inlet manifold of the separating plate and the air inlet manifold of the end plate that selectively supplies additional hydrogen to the cathode through the air path when needed.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: September 27, 2016
    Assignee: Hyundai Motor Company
    Inventors: Junghan Yu, Hyun Suk Choo, Se Joon Im
  • Publication number: 20160149237
    Abstract: An apparatus for preventing moisture condensation includes a fuel cell stack and an enclosure in which the fuel cell stack is disposed. A heater and a temperature sensor are provided in the enclosure. A controller is configured to control the heater to be turned on when an insulation resistance between the fuel cell stack and the enclosure is less than a preset resistance value. The controller controls the heater not to be turned on when a surface temperature of the enclosure measured by the temperature sensor exceeds a preset temperature.
    Type: Application
    Filed: March 30, 2015
    Publication date: May 26, 2016
    Inventors: Jung Han YU, Jung Do SUH, Ju Han KIM, Duck Whan KIM, Se Joon IM, Young Woo NOH
  • Publication number: 20150188164
    Abstract: A hydrogen supply apparatus of fuel cell stack is provided. In particular, a plurality of unit cells includes a membrane electrode assembly, a separating plate disposed on two sides of the membrane electrode assembly, a coolant path, an air path, a fuel path, and an air inlet manifold communicated with the air path. An end plate is disposed on each end of the plurality of unit cells and forms an air inlet manifold in a location corresponding to the air inlet manifold of the separating plate. Additionally, a hydrogen supply apparatus is provided in the air inlet manifold of the separating plate and the air inlet manifold of the end plate that selectively supplies additional hydrogen to the cathode through the air path when needed.
    Type: Application
    Filed: October 24, 2014
    Publication date: July 2, 2015
    Inventors: Junghan Yu, Hyun Suk Choo, Se Joon Im
  • Publication number: 20140065507
    Abstract: Disclosed is a stack for simulating a cell voltage reversal behavior in a fuel cell. The stack is configured to have a structure in which a separator of a portion of a plurality of cells in the stack have an inlet of a hydrogen flow field partially blocked to induce hydrogen starvation only in the portion of the plurality of cells.
    Type: Application
    Filed: November 29, 2012
    Publication date: March 6, 2014
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im
  • Publication number: 20130130135
    Abstract: A fuel cell system is disclosed. More specifically, the fuel cell system may include a stack that includes an electrical generation assembly of a fuel cell, an air supply unit that supplies air to a cathode of the fuel cell, a humidifier that humidifies exhaust air that is exhausted from the cathode and supply air that is supplied from the air supply unit, a hydrogen supply unit that supplies the anode of the fuel cell with hydrogen, and a water trap that traps condensate that is generated by the anode and exhausts it. In particular, the supply air is supplied to an upstream side of the humidifier and the condensate that is trapped in the water trap is supplied to an upstream side of the humidifier.
    Type: Application
    Filed: June 26, 2012
    Publication date: May 23, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Hyo Sub Shim, Se Joon Im, HyunJae Lee, Deukkuen Ahn, Jong Hyun Lee
  • Publication number: 20130029238
    Abstract: The present invention provides a startup control device and method for a fuel cell system. The startup control device includes a concentration meter, a hydrogen feed rate controller, and a controller. The concentration meter measures the concentration of oxygen located in the anode of a fuel cell stack. The hydrogen feed rate controller is disposed at an inlet of the anode. The controller receives an oxygen concentration signal value from the concentration meter while controlling the hydrogen feed rate controller to adjust a hydrogen feed rate to the anode.
    Type: Application
    Filed: August 1, 2011
    Publication date: January 31, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Se Joon Im, Jae Jun Ko, Young Min Kim, Ik Jae Son, Jong Hyun Lee
  • Publication number: 20120141896
    Abstract: Disclosed are a fuel cell system and a method of controlling the system to efficiently remove air flowing into an anode side and a cathode side during a stop of a fuel cell vehicle to prevent an overvoltage of a fuel cell stack that is generated at the time of a start-up thereby enhancing a durability of a fuel cell stack. The fuel cell system illustratively includes a concentration detector mounted at a cathode side and/or an anode side of a fuel cell stack to detect the oxygen concentration in the air; a controller that outputs a control signal to release air when the oxygen concentration is greater than a set value; and an absorber that absorbs air from the cathode side and/or the anode side through an absorption line in response to the control signal output from the controller to thereby release the absorbed air to the outside.
    Type: Application
    Filed: August 1, 2011
    Publication date: June 7, 2012
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Se Joon Im, Jong Hyun Lee
  • Publication number: 20120123620
    Abstract: The present invention provides a purging device and method for improving cold start performance of a fuel cell by direct heating, in which a gas mixture of hydrogen and air is supplied to a cathode of a fuel cell stack after shutdown of a fuel cell system to generate heat by a reaction of hydrogen and air, and the generated heat is used to increase the temperature of the fuel cell stack and, at the same time, remove water from the fuel cell stack.
    Type: Application
    Filed: May 18, 2011
    Publication date: May 17, 2012
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Jae Jun Ko, Young Min Kim, Se Joon Im, Jong Hyun Lee
  • Patent number: 8053131
    Abstract: The present invention provides an apparatus and method for determining deterioration of a fuel cell, the method including measuring in real time fluoride ion concentration or pH value of outflow water from a fuel cell stack during operation in a fuel cell vehicle, calculating a fluoride emission rate from the measured value and, if the calculated fluoride emission rate is out of a predetermined normal range, determining deterioration of an electrolyte membrane of the fuel cell stack.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: November 8, 2011
    Assignees: Hyundai Motor Company, Industry-Academy Cooperation Foundation, SCNU
    Inventors: Ik Jae Son, Byung Ki Ahn, Tae Won Lim, Jong Hyun Lee, Kwon Pil Park, Ho Lee, Chang Won Jung, Seung Chan Oh, Jae Jun Ko, Young Min Kim, Sae Hoon Kim, Jong Jin Yoon, Se Joon Im