Patents by Inventor Kyung Bin YOO
Kyung Bin YOO 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: 20180175388Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a lithium metal oxide including elements the same as those of the first cathode active material particle, and the second cathode active material particle has a uniform composition from a central portion to a surface.Type: ApplicationFiled: December 14, 2017Publication date: June 21, 2018Inventors: Kook Hyun Han, Kyung Bin Yoo, Duck Chul Hwang
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Publication number: 20180145313Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a constant concentration composition.Type: ApplicationFiled: November 17, 2017Publication date: May 24, 2018Inventors: Duck Chul Hwang, Kyung Bin Yoo, Kook Hyun Han
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Publication number: 20180145323Abstract: A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separator interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a continuous concentration gradient in at least one region between a central portion and a surface portion. The second cathode active material particle includes a lithium metal oxide including at least two metals except for lithium which have constant concentrations from a central portion to a surface, and the second cathode active material particle includes an excess amount of nickel among the metals except for lithium.Type: ApplicationFiled: November 17, 2017Publication date: May 24, 2018Inventors: Kyung Bin Yoo, Kook Hyun Han, Duck Chul Hwang
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Publication number: 20170200944Abstract: Provided is a lithium secondary battery containing a cathode active material capable of preventing decreases in power and cycle life occurring at the time of adding a sulfur based additive used in order to improve high-temperature storage characteristics to an electrolyte.Type: ApplicationFiled: December 21, 2016Publication date: July 13, 2017Inventors: Duck Chul Hwang, Kyung Bin Yoo, Kook Hyun Han
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Publication number: 20170170474Abstract: Provided is a lithium secondary battery including a cathode containing a cathode active material in which a central part has a different concentration from a surface part, and a conductive material having a specific composition ratio, and specifically, a lithium secondary battery including a cathode containing a cathode active material in which a central part of one or more kinds of metals configuring the cathode active material has a different concentration from a surface part thereof, and two or more kinds of conductive materials mixed at a specific ratio, thereby having excellent stability and high low-temperature characteristic and high output characteristic as compared to a conventional lithium secondary battery.Type: ApplicationFiled: December 7, 2016Publication date: June 15, 2017Inventors: Kook Hyun HAN, Kyung Bin YOO, Duck Chul HWANG
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Publication number: 20170077513Abstract: A lithium secondary battery includes a cathode electrode, an anode electrode, and a separation film installed between the cathode electrode and the anode electrode, wherein the cathode electrode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a concentration gradient region between a core part and a surface part thereof, and the separation film includes a base film and a ceramic coating layer formed on at least one surface of the base film, such that it is possible to achieve a significantly improved effect in both of the lifespan property and penetration durability.Type: ApplicationFiled: September 9, 2016Publication date: March 16, 2017Inventors: Kook-Hyun HAN, Kyung-Bin YOO, Duck-Chul HWANG
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Publication number: 20170047609Abstract: Disclosed is a lithium secondary battery including a cathode electrode, an anode electrode, and a separation film installed between the cathode electrode and the anode electrode, wherein the cathode electrode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a continuous concentration gradient region between a core part and a surface part thereof, the anode electrode includes a ceramic coating layer on at least one surface thereof, and the separation film includes a base film, and a ceramic coating layer formed on at least one surface of the base film, such that it is possible to achieve a significantly improved effect in both of the lifespan property and penetration durability.Type: ApplicationFiled: August 9, 2016Publication date: February 16, 2017Inventors: Kook-Hyun Han, Kyung-Bin Yoo, Duck-Chul Hwang
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Publication number: 20160365570Abstract: Disclosed is a lithium secondary battery including a cathode, an anode, and a separation film installed between the cathode and the anode, wherein the cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a continuous concentration gradient region between a core part and a surface part thereof, and the separation film includes a base film, and a ceramic coating layer formed on at least one surface of the base film, such that lifespan property is significantly improved, while exhibiting excellent penetration safety.Type: ApplicationFiled: June 10, 2016Publication date: December 15, 2016Inventors: Kook-Hyun Han, Kyung-Bin Yoo, Duck-Chul Hwang
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Patent number: 9496570Abstract: Disclosed herein is an apparatus for controlling a fuel cell heating value. The apparatus includes stack condition sensors which senses conditions of respective fuel cell stacks, and a control unit. Based on conditions of the fuel cell stacks sensed by the stack condition sensors, when at least one conditioning target stack having a heating value that is out of a preset heating value threshold range is sensed, the control unit forms a conditioning target stack group including the sensed at least one conditioning target stack or at least two conditioning target stack groups including the sensed at least one conditioning target stack and connects each of the conditioning target stack groups to at least one of at least two heating value conditioning units.Type: GrantFiled: May 14, 2014Date of Patent: November 15, 2016Assignee: SK INNOVATION CO., LTD.Inventors: Seong Je Wu, Kyung Bin Yoo, Young Dae Kim
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Publication number: 20160190567Abstract: Disclosed is a lithium secondary battery, including a cathode, an anode and a non-aqueous electrolyte, wherein the cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a concentration gradient region between a core part and a surface part thereof, and the anode includes hard carbon having an average lattice distance (d002) in the range of 3.6 to 3.8 ? and graphite having-an average lattice distance (d002) in the range of 3.356 to 3.360 ?, such that output and high-temperature storage properties may be improved.Type: ApplicationFiled: December 29, 2015Publication date: June 30, 2016Inventors: Duck-Chul Hwang, Kyung-Bin Yoo, Kook-Hyun Han
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Publication number: 20160181599Abstract: Disclosed is a lithium secondary battery, including a cathode, an anode and a non-aqueous electrolyte, wherein the cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a concentration gradient region between a core part and a surface part thereof, and the anode includes graphite having an average lattice distance d002 of 3.356 to 3.365 ?, thereby having excellent high-temperature storage and life-span properties.Type: ApplicationFiled: December 22, 2015Publication date: June 23, 2016Inventors: Duck-Chul Hwang, Kyung-Bin Yoo, Kook-Hyun Han
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Publication number: 20160172671Abstract: The present invention relates to a lithium secondary battery, and more specifically, to a lithium secondary battery including a cathode, an anode and a non-aqueous electrolyte solution, where the cathode includes a cathode active material including a lithium-metal oxide which is doped with a transition metal and includes at least one type of metal having a concentration gradient region between a central portion and a surface portion, and thus having a significantly increased charge/discharge capacity and output at a low temperature to exhibit excellent properties in the low-temperature environment.Type: ApplicationFiled: December 14, 2015Publication date: June 16, 2016Inventors: Kyung-Bin Yoo, Kook-Hyun Han, Duck-Chul Hwang
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Publication number: 20160164077Abstract: Disclosed is a lithium secondary battery, including a cathode, an anode and a non-aqueous electrolyte, wherein the cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a concentration gradient region between a core part and a surface part thereof, and the non-aqueous electrolyte includes a lithium salt, a polyfunctional nitrile compound and an organic solvent, such that the high-temperature storage and lifespan properties may be improved.Type: ApplicationFiled: December 2, 2015Publication date: June 9, 2016Inventors: Duck-Chul Hwang, Kyung-Bin Yoo, Kook-Hyun Han
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Publication number: 20160149210Abstract: Disclosed is a lithium secondary battery, including a cathode, an anode and a non-aqueous electrolyte, wherein the cathode includes a cathode active material containing lithium-metal oxide of which at least one of metals has a continuous concentration gradient from a core part to a surface part thereof, and is doped with transitional metal, such that the charge/discharge capacities and the power are significantly increased, and thereby it is possible to exhibit excellent performance under low temperature environments.Type: ApplicationFiled: November 20, 2015Publication date: May 26, 2016Inventors: Kyung-Bin YOO, Duck-Chul HWANG, Jin-Sub LIM, Kook-Hyun HAN
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Patent number: 9312553Abstract: Disclosed herein is an apparatus for controlling a fuel cell system, including: a plurality of stack state detecting units for detecting respective states of a plurality of fuel cell stacks; a switching unit for connecting at least parts of the plurality of fuel cell stacks to each other in series or in parallel; and a control unit for detecting at least one degraded stack based on the states of the stacks detected by the plurality of stack state detecting units, and forming at least one degraded stack unit including the detected at least one degraded stack by controlling the operation of the switching unit, so the apparatus can quickly and easily connect the stacks to each other in series, in parallel or in series-parallel using cheap electric switches instead of using a plurality of power conditioning system (PCS).Type: GrantFiled: April 23, 2014Date of Patent: April 12, 2016Assignee: SK INNOVATION CO., LTD.Inventors: Kyung Bin Yoo, Young Dae Kim, Seong Je Wu, Su Hyun Lee, Byung Hee Kang, Jeong Pyo Lee
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Publication number: 20150349308Abstract: Provided is a lithium secondary battery in which a separator is not provided. The lithium secondary battery includes a cathode in which a cathode active material layer is formed on a cathode current collector; an anode in which an anode active material layer is formed on an anode current collector; and an inorganic layer positioned between the cathode and the anode facing each other and containing inorganic particles and a binder. The inorganic layer is in a state in which the inorganic layer is bound to both of the cathode active material layer and the anode active material layer.Type: ApplicationFiled: June 1, 2015Publication date: December 3, 2015Inventors: Duck Chul Hwang, Sang Jin Kim, Kyung Bin Yoo, Jin Sub Lim, Yong Hyun Cho, Kook Hyun Han
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Publication number: 20150270563Abstract: Disclosed herein is an apparatus for controlling a fuel cell system, which includes multiple hot boxes including multiple fuel cell stacks, using a reconfigurable network having linear switching complexity, includes: a power conversion system for supplying outputs of normal stacks among the multiple fuel cell stacks to a load; at least one auxiliary power conversion system for supplying an output of at least one deteriorated stack among the multiple stacks to a load; a reconfigurable switch network for connecting in series or in parallel stacks of any hot box to stacks of another hot box; and a control unit for controlling an operation of the reconfigurable switch network by detecting a state of each of the stacks.Type: ApplicationFiled: March 17, 2015Publication date: September 24, 2015Inventors: Byung Hee KANG, Seong Je WU, Kyung Bin YOO, Naehyuck CHANG, Jaemin KIM
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Publication number: 20150188167Abstract: Disclosed herein is an apparatus for controlling a fuel cell heating value. The apparatus includes stack condition sensors which senses conditions of respective fuel cell stacks, and a control unit. Based on conditions of the fuel cell stacks sensed by the stack condition sensors, when at least one conditioning target stack having a heating value that is out of a preset heating value threshold range is sensed, the control unit forms a conditioning target stack group including the sensed at least one conditioning target stack or at least two conditioning target stack groups including the sensed at least one conditioning target stack and connects each of the conditioning target stack groups to at least one of at least two heating value conditioning units.Type: ApplicationFiled: May 14, 2014Publication date: July 2, 2015Applicant: SK Innovation Co., Ltd.Inventors: Seong Je WU, Kyung Bin YOO, Young Dae KIM
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Publication number: 20150064588Abstract: Disclosed herein is an apparatus for controlling a fuel cell system, including: a plurality of stack state detecting units for detecting respective states of a plurality of fuel cell stacks; a switching unit for connecting at least parts of the plurality of fuel cell stacks to each other in series or in parallel; and a control unit for detecting at least one degraded stack based on the states of the stacks detected by the plurality of stack state detecting units, and forming at least one degraded stack unit including the detected at least one degraded stack by controlling the operation of the switching unit, so the apparatus can quickly and easily connect the stacks to each other in series, in parallel or in series-parallel using cheap electric switches instead of using a plurality of power conditioning system (PCS).Type: ApplicationFiled: April 23, 2014Publication date: March 5, 2015Applicant: SK Innovation Co., Ltd.Inventors: Kyung Bin YOO, Young Dae KIM, Seong Je WU, Su Hyun LEE, Byung Hee KANG, Jeong Pyo LEE