Patents by Inventor Bo Ki Hong
Bo Ki Hong 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).
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Publication number: 20140162167Abstract: A gas diffusion layer (GDL) for fuel cell applications that can prevented channels of a bipolar plate from being intruded. The gas diffusion layer is manufactured by cutting a GDL material at a certain angle such that a machine direction of the inherent high stiffness of the GDL material is not in parallel with a major flow field direction of a bipolar plate to prevent the GDL intrusion into the channels of the bipolar plate without modifying an existing method for manufacturing the gas diffusion layer. With the gas diffusion layer, the electrochemical performance of the fuel cell can be improved and manufacturing process can be improved even in the case where the width of the rolled GDL material is small.Type: ApplicationFiled: February 18, 2014Publication date: June 12, 2014Applicant: HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Kook Il Han
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Patent number: 8703354Abstract: Disclosed is a membrane electrode assembly with enhanced hydrophobicity and a method for manufacturing the same. In particular, a nano pattern with a high aspect ratio is formed in a catalyst support on the surface of a catalyst layer constituting the membrane electrode assembly using plasma etching. A hydrophobic thin film is then formed on the nano pattern formed in the catalyst support.Type: GrantFiled: November 8, 2012Date of Patent: April 22, 2014Assignees: Hyundai Motor Company, Korea Institute of Science and TechnologyInventors: Bo Ki Hong, Sae Hoon Kim, Myoung Woon Moon, Kwang Ryeol Lee, Kyu Hwan Oh, Eun Kyu Her
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Publication number: 20140077462Abstract: Disclosed is an integrated fluorine gasket manufactured by injection molding for hydrogen fuel cells. In particular, a fluorine compound having a fluorine content of about 60 to 75 parts by weight based on 100 parts by weight of a fluoroelastomer is disposed in a gasket. The resulting fluorine gasket is integrated with a thin bipolar plate having a thickness of about 200 ?m or less to have a thickness of about 750 ?m or less by injection molding on the thin bipolar plate and by cross-linking.Type: ApplicationFiled: December 14, 2012Publication date: March 20, 2014Applicants: HYUNDAI MOTOR COMPANY, E.I. DU PONT DE NEMOURS AND COMPANY, DONGA MANUFACTURING CORP.Inventors: Bo Ki Hong, Byeong Heon Jeong, Seung Kyung Ko, Stephen Bowers, Ho Jin Lee, Yoon Gue Choi
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Publication number: 20140065507Abstract: 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: ApplicationFiled: November 29, 2012Publication date: March 6, 2014Applicant: HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Se Joon Im
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Publication number: 20140030815Abstract: Disclosed is a pinhole inspection apparatus, system and method for a membrane electrode assembly of a fuel cell, which can easily detect the position of a pinhole using water and a pH test paper from discoloration caused when the water is in contact with the pH test paper through the pinhole, thus solving the existing problems and allowing the membrane electrode assembly to be reused after the inspection. In particular, a lower fixture is configured to support the membrane electrode assembly and water is uniformly distributed on an upper surface of the membrane electrode assembly. A pH test paper is inserted between the membrane electrode assembly and the lower fixture and discolored upon coming in contact with water that passes through a pinhole in the membrane electrode assembly, thus detecting the presence and position of the pinhole.Type: ApplicationFiled: November 27, 2012Publication date: January 30, 2014Applicant: HYUNDAI MOTOR COMPANYInventors: Ji Yeon Park, Bo Ki Hong, Sang Yeoul Ahn
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Publication number: 20140004443Abstract: Disclosed is a membrane electrode assembly with enhanced hydrophobicity and a method for manufacturing the same. In particular, a nano pattern with a high aspect ratio is formed in a catalyst support on the surface of a catalyst layer constituting the membrane electrode assembly using plasma etching. A hydrophobic thin film is then formed on the nano pattern formed in the catalyst support.Type: ApplicationFiled: November 8, 2012Publication date: January 2, 2014Inventors: Bo Ki Hong, Sae Hoon Kim, Myoung Woon Moon, Kwang Ryeol Lee, Kyu Hwan Oh, Eun Kyu Her
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Patent number: 8597857Abstract: The present invention provides a metallic porous body for a fuel cell, which includes a flat portion formed to be integrated with a gasket or a separator and a gasket, and thus the metallic porous body has improved handling and working properties and can be accurately and precisely stacked, thus improving the stability of cell performance, the air-tightness, and the productivity of a fuel cell stack. As such, the present invention provides a metallic porous body for a fuel cell including a porous portion, which is in contact with a reactive area of a membrane electrode assembly and corresponds to a reactive area of each unit cell, and a flat portion having a flat surface structure formed along outer edges of the metallic porous body other than the porous portion corresponding to the reactive area.Type: GrantFiled: May 18, 2011Date of Patent: December 3, 2013Assignee: Hyundai Motor CompanyInventors: Byeong-Heon Jeong, Bo Ki Hong
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Publication number: 20130252124Abstract: A system for activating a fuel cell includes a flow meter for measuring the amount of water discharged from an outlet of the air electrode and an outlet of the fuel electrode; a pressure sensor for measuring the pressure at the respective outlets; and a back pressure regulator receiving flow values measured by the flow meters and pressure values measured by the pressure sensors, which are fed back from a controller, and regulating a pressure difference (?P=PCathode?PAnode) to be a value greater than 0. With the system, the activation time of a fuel cell and the amount of hydrogen used for the activation can be reduced, thus improving the productivity and manufacturing cost.Type: ApplicationFiled: May 9, 2013Publication date: September 26, 2013Applicant: Hyundai Motor CompanyInventors: Sang Yeoul Ahn, Sae Hoon Kim, Tae Won Lim, Bo Ki Hong, Byung Ki Ahn
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Patent number: 8455121Abstract: A system for activating a fuel cell includes a flow meter for measuring the amount of water discharged from an outlet of the air electrode and an outlet of the fuel electrode; a pressure sensor for measuring the pressure at the respective outlets; and a back pressure regulator receiving flow values measured by the flow meters and pressure values measured by the pressure sensors, which are fed back from a controller, and regulating a pressure difference (?P=PCathode?PAnode) to be a value greater than 0. With the system, the activation time of a fuel cell and the amount of hydrogen used for the activation can be reduced, thus improving the productivity and manufacturing cost.Type: GrantFiled: July 15, 2009Date of Patent: June 4, 2013Assignee: Hyundai Motor CompanyInventors: Tae Won Lim, Sae Hoon Kim, Sang Yeoul Ahn, Bo Ki Hong, Byung Ki Ahn
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Publication number: 20130089807Abstract: Disclosed is a fuel cell with enhanced mass transfer characteristics in which a highly hydrophobic porous medium, which is prepared by forming a micro-nano dual structure in which nanometer-scale protrusions with a high aspect ratio are formed on the surface of a porous medium with a micrometer-scale roughness by plasma etching and then by depositing a hydrophobic thin film thereon, is used as a gas diffusion layer, thereby increasing hydrophobicity due to the micro-nano dual structure and the hydrophobic thin film. When this highly hydrophobic porous medium is used as a gas diffusion layer for a fuel cell, it is possible to reduce water flooding by efficiently discharging water produced by an electrochemical reaction of the fuel cell and to improve the performance of the fuel cell by facilitating the supply of reactant gases such as hydrogen and air (oxygen) to a membrane-electrode assembly (MEA).Type: ApplicationFiled: June 19, 2012Publication date: April 11, 2013Applicants: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Sae Hoon Kim, Kook Il Han, Kwang Ryeol Lee, Myoung Woon Moon
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Patent number: 8316721Abstract: The present invention provides an apparatus and method for non-destructive measurement of bending stiffness of a gas diffusion layer (GDL) for a fuel cell by measuring a sagging length of a GDL sample, which can be used for a fuel cell, without damaging or destroying the GDL sample.Type: GrantFiled: October 25, 2010Date of Patent: November 27, 2012Assignee: Hyundai Motor CompanyInventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Byeong Heon Jeong, Sang Yeoul Ahn
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Publication number: 20120276335Abstract: The present invention provides a porous medium with increased hydrophobicity and a method of manufacturing the same, in which a micro-nano dual structure is provided by forming nanoprotrusions with a high aspect ratio by performing plasma etching on the surface of a porous medium with a micrometer-scale surface roughness and a hydrophobic thin film is deposited on the surface of the micro-nano dual structure, thus significantly increasing hydrophobicity. When this highly hydrophobic porous medium is used as a gas diffusion layer of a fuel cell, it is possible to efficiently discharge water produced during electrochemical reaction of the fuel cell, thus preventing flooding in the fuel cell. Moreover, it is possible to sufficiently supply reactant gases such as hydrogen and air (oxygen) to a membrane electrode assembly (MEA), thus improving the performance of the fuel cell.Type: ApplicationFiled: August 16, 2011Publication date: November 1, 2012Applicants: KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY, HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Sae Hoon Kim, Kwang Ryeol Lee, Myoung Woon Moon
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Publication number: 20120141902Abstract: The present invention provides a fuel cell stack with enhanced freeze-thaw durability. In particular, the fuel cell stack includes a gas diffusion layer between a membrane-electrode assembly and a bipolar plate. The gas diffusion layer has a structure that reduces contact resistance in a fuel cell and is cut at a certain angle such that the machine direction (high stiffness direction) of GDL roll is not in parallel with the major flow field direction of the bipolar plate, resulting in an increased GDL stiffness in a width direction perpendicular to a major flow field direction of a bipolar plate.Type: ApplicationFiled: April 1, 2011Publication date: June 7, 2012Applicants: KIA MOTORS CORPORATION, HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Kook Il Han, Sae Hoon Kim, Jae Jun Ko
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Publication number: 20120115072Abstract: The present invention provides a metallic porous body for a fuel cell, which includes a flat portion formed to be integrated with a gasket or a separator and a gasket, and thus the metallic porous body has improved handling and working properties and can be accurately and precisely stacked, thus improving the stability of cell performance, the air-tightness, and the productivity of a fuel cell stack. As such, the present invention provides a metallic porous body for a fuel cell including a porous portion, which is in contact with a reactive area of a membrane electrode assembly and corresponds to a reactive area of each unit cell, and a flat portion having a flat surface structure formed along outer edges of the metallic porous body other than the porous portion corresponding to the reactive area.Type: ApplicationFiled: May 18, 2011Publication date: May 10, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Byeong-Heon Jeong, Bo Ki Hong
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Publication number: 20120088179Abstract: A method of clamping a fuel cell stack includes a stack preliminary clamping step, a stack pre-treatment step of performing a gas flow rate variation cycle or a clamping pressure variation cycle, wherein the gas flow rate variation cycle repeatedly changes a flow rate of a gas supplied to an anode and a cathode included in the preliminarily clamped stack, and wherein the clamping pressure variation cycle repeatedly increases and decreases the clamping pressure by pressurization and pressure release of the preliminarily clamped stack using the pressure tool, and a stack main clamping step of correcting a variation in clamping pressure occurring due to a variation in thickness of a gas diffusion layer to mainly clamp the stack after the stack pre-treatment step.Type: ApplicationFiled: November 22, 2010Publication date: April 12, 2012Applicant: Hyundai Motor CompanyInventors: Bu Ho Kwak, Bo Ki Hong, Kook Il Han, Ji Yeon Park
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Publication number: 20110314928Abstract: The present invention provides an apparatus and method for non-destructive measurement of bending stiffness of a gas diffusion layer (GDL) for a fuel cell by measuring a sagging length of a GDL sample, which can be used for a fuel cell, without damaging or destroying the GDL sample.Type: ApplicationFiled: October 25, 2010Publication date: December 29, 2011Applicant: HYUNDAI MOTOR COMPANYInventors: Bo Ki Hong, Kook Il Han, Ji Yeon Park, Byeong Heon Jeong, Sang Yeoul Ahn
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Publication number: 20110136044Abstract: A gas diffusion layer (GDL) for fuel cell applications that can prevented channels of a bipolar plate from being intruded. The gas diffusion layer is manufactured by cutting a GDL material at a certain angle such that a machine direction of the inherent high stiffness of the GDL material is not in parallel with a major flow field direction of a bipolar plate to prevent the GDL intrusion into the channels of the bipolar plate without modifying an existing method for manufacturing the gas diffusion layer. With the gas diffusion layer, the electrochemical performance of the fuel cell can be improved and manufacturing process can be improved even in the case where the width of the rolled GDL material is small.Type: ApplicationFiled: February 10, 2010Publication date: June 9, 2011Applicant: HYUNDAI MOTOR COMPANYInventors: Kook Il Han, Bo Ki Hong
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Publication number: 20100129689Abstract: A system for activating a fuel cell includes a flow meter for measuring the amount of water discharged from an outlet of the air electrode and an outlet of the fuel electrode; a pressure sensor for measuring the pressure at the respective outlets; and a back pressure regulator receiving flow values measured by the flow meters and pressure values measured by the pressure sensors, which are fed back from a controller, and regulating a pressure difference (?P=PCathode?PAnode) to be a value greater than 0. With the system, the activation time of a fuel cell and the amount of hydrogen used for the activation can be reduced, thus improving the productivity and manufacturing cost.Type: ApplicationFiled: July 15, 2009Publication date: May 27, 2010Applicant: HYUNDAI MOTOR COMPANYInventors: Tae Won Lim, Sae Hoon Kim, Sang Yeoul Ahn, Bo Ki Hong, Byung Ki Ahn
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Publication number: 20100129696Abstract: The present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer, which functions to supply hydrogen and air (oxygen) as reactant gases to a fuel cell stack, discharge product water generated by an electrochemical reaction, and transmit generated electricity, being formed with a thinned structure. For this purpose, the present invention provides a gas diffusion layer for a fuel cell vehicle with improved operational stability, the gas diffusion layer being formed with a dual layer structure including a microporous layer and a macroporous substrate, the macroporous substrate being formed of a material selected from the group consisting of carbon fiber felt and carbon fiber paper, the gas diffusion layer being thinned to have a thickness of 200 to 300 ?m at 25 kPa and a thickness of 170 to 250 ?m at 1 MPa, a density of 0.20 to 0.Type: ApplicationFiled: August 18, 2009Publication date: May 27, 2010Applicants: Hyundai Motor Company, Kia Motors CorporationInventors: Bo Ki Hong, Kook II Han, Sang Yeoul Ahn, Keun Je Lee, Byeong Heon Jeong
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Publication number: 20100000679Abstract: The present invention provides a method for bonding a membrane electrode assembly (MEA) and a gas diffusion layer (GDL) of a fuel cell stack, which facilitates stacking of an electrode catalyst layer of the MEA and the GDL and, at the same time, facilitates the keeping of the stacked layers for mass production of the fuel cell stack. For this purpose, the present invention provides a method for bonding a membrane electrode assembly and a gas diffusion layer of a fuel cell stack, the method including: coating a catalyst layer on a surface of a polymer electrolyte membrane; attaching a sub-gasket on the circumference of the polymer electrolyte membrane; and stacking a gas diffusion layer onto an outer surface of the catalyst layer by bonding all or a portion of an outer surface of the sub-gasket and the circumference of the gas diffusion layer with a bonding means.Type: ApplicationFiled: January 13, 2009Publication date: January 7, 2010Applicant: HYUNDAI MOTOR COMPANYInventors: Kook Il Han, Keun Je Lee, Sae Hoon Kim, Bo Ki Hong, Byung Ki Ahn