Patents by Inventor Young Bum Kum

Young Bum Kum 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: 11177491
    Abstract: A fuel cell having a structure for detachably mounting a cell-monitoring connector thereon includes separators arranged to be spaced apart from each other in a first direction, each of the separators including a receiving recess arranged in one side thereof, and hook-shaped gaskets respectively disposed on the separators and located around the receiving recess. The cell-monitoring connector includes a housing, at least a portion of the housing being received in a receiving space defined by the receiving recess, and connection terminals inserted into the housing to be connected to the separators. The housing includes a body inserted into the receiving space in a second direction that intersects the first direction, and a lever portion including a latching protrusion configured to be latched to or separated from a corresponding gasket among the hook-shaped gaskets by a pressing operation.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: November 16, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Molex, LLC, Yura Corporation
    Inventors: Ki Wook Ohm, Kwi Seong Jeong, Duck Whan Kim, Suk Min Baeck, Ju Han Kim, Seung Jun Yeon, Young Bum Kum, Yong Suk Heo, Ho Sung Lee, Joon Woo Kim
  • Patent number: 11014201
    Abstract: A laser welding apparatus for laser-welding a first welding target and a second welding target seated on the first welding target includes a first jig on which the first welding target is seated, a second jig configured to press the first welding target such that the first welding target is adhered to the first jig, a third jig configured to press the second welding target such that the second welding target is adhered to the first welding target, one or more connection members connecting the second jig and the third jig such that the second welding target is pressed by the second jig when the first welding target is pressed by the first jig, and a laser head configured to laser-weld the first welding target and the second welding target by irradiating a laser beam to a specific welding part of the second welding target.
    Type: Grant
    Filed: July 18, 2018
    Date of Patent: May 25, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Dong Yang Piston Co., Ltd.
    Inventors: Duck Whan Kim, Kwi Seong Jeong, Jung Han Yu, Young Bum Kum, Young Je Lee, Tae Min Lee, Yong Woo Choi, Chang Jun Lee
  • Patent number: 10985396
    Abstract: A fuel cell stack is provided and includes a fuel cell assembly in which a plurality of fuel cells are stacked between upper and lower current collectors. The fuel cell stack includes an enclosure that pressurizes and seals the fuel cell assembly in a stacked direction of the fuel cells.
    Type: Grant
    Filed: June 20, 2018
    Date of Patent: April 20, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Suk Min Baeck, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 10910659
    Abstract: A method and system for diagnosing a state of fuel cell are provided. The system includes a signal measurement unit that has a high pass filter with a predetermined cut-off frequency and a voltage measurement circuit, and that measures a first AC voltage to measure the fuel cell state diagnosis signal and a noise measurement unit including a band pass filter that has a predetermined pass band and a voltage measurement circuit, and that measures a second AC voltage to measure the fuel cell state diagnosis noise. A controller calculates a signal to noise ratio (SNR) of fuel cell state diagnosis data based on the first and second AC voltages, determines the corresponding fuel cell state diagnosis data to be reliable when the SNR value is greater than a predetermined reference value, and applies the fuel cell state diagnosis data to a control of a fuel cell vehicle.
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: February 2, 2021
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sangbok Won, Young Bum Kum, Kwi Seong Jeong
  • Publication number: 20200185740
    Abstract: A fuel cell having a structure for detachably mounting a cell-monitoring connector thereon includes separators arranged to be spaced apart from each other in a first direction, each of the separators including a receiving recess arranged in one side thereof, and hook-shaped gaskets respectively disposed on the separators and located around the receiving recess. The cell-monitoring connector includes a housing, at least a portion of the housing being received in a receiving space defined by the receiving recess, and connection terminals inserted into the housing to be connected to the separators. The housing includes a body inserted into the receiving space in a second direction that intersects the first direction, and a lever portion including a latching protrusion configured to be latched to or separated from a corresponding gasket among the hook-shaped gaskets by a pressing operation.
    Type: Application
    Filed: August 29, 2019
    Publication date: June 11, 2020
    Inventors: Ki Wook Ohm, Kwi Seong Jeong, Duck Whan Kim, Suk Min Baeck, Ju Han Kim, Seung Jun Yeon, Young Bum Kum, Yong Suk Heo, Ho Sung Lee, Joon Woo Kim
  • Patent number: 10581095
    Abstract: A manifold block mounted to a fuel cell stack for supplying and distributing air and hydrogen to the stack, the manifold block comprises: a main body including a hydrogen inlet, a hydrogen outlet, an air inlet and an air outlet; a hydrogen outlet cover welded to an outer surface of the main body and including a condensation chamber connected to the hydrogen outlet; an air inlet cover welded to an inner surface of the main body and including an air inflow portion connected to the air inlet; and an air outlet cover welded to the inner surface of the main body and including an air outflow portion connected to the air outlet.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: March 3, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Duck Whan Kim, Jung Han Yu, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 10566636
    Abstract: An end cell heater assembly includes: a case which has a first surface joined to an end plate of a fuel cell stack; a planar heating element installed in an accommodating groove formed in a second surface of the case; a terminal plate which is stacked and interposed between the planar heating element and an end cell of the fuel cell stack, joined and electrically connected to the end cell, and transferring heat generated by the planar heating element to the end cell; and a terminal which is integrally formed with the terminal plate so as to output electrical energy generated by the fuel cell stack and transferred through the terminal plate, to the outside.
    Type: Grant
    Filed: December 14, 2016
    Date of Patent: February 18, 2020
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Hanon Systems
    Inventors: Ju Han Kim, Sun Heum Baek, Young Bum Kum, Dae Jong Kim, Kil Sang Jang
  • Patent number: 10411270
    Abstract: A bus plate unit is provided. The bus plate unit electrically connects a unit stack for a fuel cell having a (+) and a (?) stack terminal at both sides. The unit includes a (+) bus plate having a first end portion bent toward a first side surface of the unit stack and electrically coupled to a (+) stack terminal of the unit stack. A second end portion has a (+) bus terminal and abuts an upper first side of the unit stack. A (?) bus plate has a first end portion bent toward a second side surface of the unit stack and electrically coupled to the (?) stack terminal of the unit stack. A second end portion provides a (?) bus terminal and is proximate to the upper second side of the unit stack. An insulating layer encloses a surface of the (+) bus plate and the (?) bus plate.
    Type: Grant
    Filed: August 30, 2016
    Date of Patent: September 10, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Duck Whan Kim, Seungjun Yeon, JuHan Kim, Young Bum Kum
  • Publication number: 20190229358
    Abstract: A method and system for diagnosing a state of fuel cell are provided. The system includes a signal measurement unit that has a high pass filter with a predetermined cut-off frequency and a voltage measurement circuit, and that measures a first AC voltage to measure the fuel cell state diagnosis signal and a noise measurement unit including a band pass filter that has a predetermined pass band and a voltage measurement circuit, and that measures a second AC voltage to measure the fuel cell state diagnosis noise. A controller calculates a signal to noise ratio (SNR) of fuel cell state diagnosis data based on the first and second AC voltages, determines the corresponding fuel cell state diagnosis data to be reliable when the SNR value is greater than a predetermined reference value, and applies the fuel cell state diagnosis data to a control of a fuel cell vehicle.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 25, 2019
    Inventors: Sangbok Won, Young Bum Kum, Kwi Seong Jeong
  • Publication number: 20190184502
    Abstract: A laser welding apparatus for laser-welding a first welding target and a second welding target seated on the first welding target includes a first jig on which the first welding target is seated, a second jig configured to press the first welding target such that the first welding target is adhered to the first jig, a third jig configured to press the second welding target such that the second welding target is adhered to the first welding target, one or more connection members connecting the second jig and the third jig such that the second welding target is pressed by the second jig when the first welding target is pressed by the first jig, and a laser head configured to laser-weld the first welding target and the second welding target by irradiating a laser beam to a specific welding part of the second welding target.
    Type: Application
    Filed: July 18, 2018
    Publication date: June 20, 2019
    Inventors: Duck Whan Kim, Kwi Seong Jeong, Jung Han Yu, Young Bum Kum, Young Je Lee, Tae Min Lee, Yong Woo Choi, Chang Jun Lee
  • Publication number: 20190181485
    Abstract: A fuel cell stack is provided and includes a fuel cell assembly in which a plurality of fuel cells are stacked between upper and lower current collectors. The fuel cell stack includes an enclosure that pressurizes and seals the fuel cell assembly in a stacked direction of the fuel cells.
    Type: Application
    Filed: June 20, 2018
    Publication date: June 13, 2019
    Inventors: Suk Min Baeck, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 10276884
    Abstract: A method and system for diagnosing a state of fuel cell are provided. The system includes a signal measurement unit that has a high pass filter with a predetermined cut-off frequency and a voltage measurement circuit, and that measures a first AC voltage to measure the fuel cell state diagnosis signal and a noise measurement unit including a band pass filter that has a predetermined pass band and a voltage measurement circuit, and that measures a second AC voltage to measure the fuel cell state diagnosis noise. A controller calculates a signal to noise ratio (SNR) of fuel cell state diagnosis data based on the first and second AC voltages, determines the corresponding fuel cell state diagnosis data to be reliable when the SNR value is greater than a predetermined reference value, and applies the fuel cell state diagnosis data to a control of a fuel cell vehicle.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: April 30, 2019
    Assignee: Hyundai Motor Company
    Inventors: Sangbok Won, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 10277025
    Abstract: A safety apparatus uses a fuel cell and a high voltage battery as a power source, and includes: a first voltage sensor that measures a voltage of a positive side of a voltage bus; a second voltage sensor that measures a voltage of a negative side of the voltage bus; and a controller that determines an electrical insulation between the positive side of the voltage bus and the electrical chassis based on the voltage of the positive side of the voltage bus and determines an electrical insulation between the negative side of the voltage bus and the electrical chassis based on the voltage of the negative side of the voltage bus.
    Type: Grant
    Filed: August 28, 2015
    Date of Patent: April 30, 2019
    Assignee: Hyundai Motor Company
    Inventors: JuHan Kim, Young Bum Kum, Yong Sun Park, Soon Il Jeon, Nam Woo Lee, Sae Hoon Kim
  • Patent number: 10249895
    Abstract: An apparatus includes a stack voltage monitor that measures a voltage of each channel of a plurality of channels of a fuel cell stack. Each of the channel of the plurality of channels includes a predetermined number of unit cells. The stack voltage monitor calculates impedance of each of the channel from the measured voltage. The apparatus further includes a controller that diagnoses a state of the fuel cell stack based on the impedance of each of the channel.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: April 2, 2019
    Assignee: HYUNDAI MOTOR COMPANY
    Inventors: Sang Bok Won, Young Bum Kum, Kwi Seong Jeong
  • Publication number: 20190013535
    Abstract: An apparatus and a method for discharging a residual electric energy of a fuel cell can rapidly discharge and remove a residual electric energy of a fuel cell for safety after the fuel cell is operated or when a collision is detected. The apparatus for discharging the residual electric energy of the fuel cell includes: a discharge relay connected with a fuel cell and turned on when starting or stopping a vehicle or a collision detecting sensor detects a collision; and a non-linear protecting element connected with the discharge relay in order to discharge a residual electric energy from the fuel cell.
    Type: Application
    Filed: September 11, 2018
    Publication date: January 10, 2019
    Inventors: Ju Han Kim, Jung Do Suh, Yong Sun Park, Young Bum Kum, Sei Hyun Lee
  • Patent number: 10106051
    Abstract: An apparatus for diagnosing a state of a fuel cell stack is provided. The apparatus may diagnose the state of the fuel cell stack without including the DC-DC converter which boosts the DC voltage and the inverter which converts the boosted DC voltage into the AC voltage. In particular, the apparatus may diagnose the state of the fuel cell by applying the rectangular wave of the single frequency having a duty ration of about 0.5 to the fuel cell stack, measuring the voltage of the fuel cell stack, detecting the even multiple harmonic component of the frequency of the rectangular wave by performing the frequency conversion on the measured voltage, and then diagnosing the state of the fuel cell stack based on the magnitude of the detected harmonic component.
    Type: Grant
    Filed: December 7, 2014
    Date of Patent: October 23, 2018
    Assignee: Hyundai Motor Company
    Inventors: Kwi Seong Jeong, Sang Bok Won, Young Bum Kum, Jae Jun Ko
  • Patent number: 10084199
    Abstract: A fuel cell stack enclosure is provided that includes side covers configured to be joined with each of end of a stack module respectively. A lower cover is also configured to be provided under the stack module and formed to partially cover a lower portion and a first side portion of an outer surface of the side cove. An upper cover may be provided over the stack module, and be formed to partially cover an upper portion and a second side portion of the outer surface of the side cover to enclose the stack module along with the lower cover while joining with the side covers.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: September 25, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Duck Whan Kim, Young Bum Kum, Jung Do Suh, Yong Suk Heo, Jung Han Yu
  • Publication number: 20180248207
    Abstract: A manifold block mounted to a fuel cell stack for supplying and distributing air and hydrogen to the stack, the manifold block comprises: a main body including a hydrogen inlet, a hydrogen outlet, an air inlet and an air outlet; a hydrogen outlet cover welded to an outer surface of the main body and including a condensation chamber connected to the hydrogen outlet; an air inlet cover welded to an inner surface of the main body and including an air inflow portion connected to the air inlet; and an air outlet cover welded to the inner surface of the main body and including an air outflow portion connected to the air outlet.
    Type: Application
    Filed: November 6, 2017
    Publication date: August 30, 2018
    Inventors: Duck Whan KIM, Jung Han YU, Young Bum KUM, Kwi Seong JEONG
  • Publication number: 20180108925
    Abstract: An apparatus includes a stack voltage monitor that measures a voltage of each channel of a plurality of channels of a fuel cell stack. Each of the channel of the plurality of channels includes a predetermined number of unit cells. The stack voltage monitor calculates impedance of each of the channel from the measured voltage. The apparatus further includes a controller that diagnoses a state of the fuel cell stack based on the impedance of each of the channel.
    Type: Application
    Filed: December 8, 2016
    Publication date: April 19, 2018
    Inventors: Sang Bok Won, Young Bum Kum, Kwi Seong Jeong
  • Patent number: 9929418
    Abstract: A system and method for diagnosing the state of a fuel cell stack are provided. The method includes simultaneously applying currents having respective first and second frequencies to a fuel cell stack and computing Fourier transforms of output currents and voltages from the fuel cell stack based on the applied currents. A real part of a first frequency impedance and an imaginary part of a second frequency impedance are calculated using amplitudes and phases of currents and voltages having the first frequency and the second frequency among the computed output currents and voltages. Further, a state of the fuel cell stack is determined by magnitude of the calculated real part of the first frequency impedance and by magnitude of the calculated imaginary part of the second frequency impedance.
    Type: Grant
    Filed: November 30, 2014
    Date of Patent: March 27, 2018
    Assignee: Hyundai Motor Company
    Inventors: Kwi Seong Jeong, Haeng Jin Ko, Young Bum Kum, Sang Bok Won