Patents by Inventor Jeon-Keun Oh
Jeon-Keun Oh 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: 20100007308Abstract: The present invention relates to a charge equalization apparatus, which can enable the primary windings and the secondary windings of transformers to be easily manufactured, can control the flow of charges into batteries depending on the charged states of series-connected batteries, and can prevent overcurrent from flowing into batteries that are currently being charged.Type: ApplicationFiled: February 5, 2008Publication date: January 14, 2010Inventors: Joong Hui Lee, Soo Yeup Jang, Jeon Keun Oh, Gun Woo Moon, Chong Eun Kim, Hong Sun Park, Chol Ho Kim
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Publication number: 20090322155Abstract: The present invention relates, in general, to a charge equalization apparatus with series-connected battery cells and, more particularly, to a charge equalization apparatus, in which series-connected battery cells (B1 to BN) are connected in parallel with the primary windings (Mi 1 to M1N) of transformers (T1 to TN), switches (S1 to SN) for controlling the flow of current of the primary windings are connected in series with the primary windings (M1 1 to M1N), and multiple secondary windings (M21 to M2N) corresponding to the primary windings are connected in parallel with each other.Type: ApplicationFiled: June 12, 2007Publication date: December 31, 2009Applicants: SK Energy Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Jeon Keun Oh, Joong Hui Lee, Soo Yeup Jang, Gun Woo Moon, Chong Eun Kim, Hong Sun Park
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Publication number: 20090302803Abstract: The present invention relates, in general, to a battery voltage equalization apparatus and method, and, more particularly, to a charge equalization apparatus and method, which decrease the withstand voltages of semiconductor switching elements while maintaining charge equalization performance, thus making it easy to implement the secondary windings of transformers while reducing the costs of the charge equalization apparatus. The charge equalization apparatus includes N first transformers (T1 to Tn) connected in series with N series-connected batteries (B1 to Bn) and adapted to decrease voltages of overcharged batteries among the N batteries. A charge storage device (Cdump) stores energy supplied from the first transformers. A second transformer (TS) redistributes energy stored in the charge storage device to the N series-connected batteries.Type: ApplicationFiled: June 13, 2007Publication date: December 10, 2009Applicants: SK ENERGY CO., LTD., KOREA INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jeon Keun Oh, Joong Hui Lee, Soo Yeup Jang, Gun Woo Moon, Chong Eun Kim, Hong Sun Park
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Publication number: 20090297944Abstract: This invention relates to a lithium secondary battery, the tab shape of which is improved, thus increasing the safety and improving the electrical properties thereof. The lithium secondary battery includes an electrode group composed of a first electrode, a second electrode, and a separator disposed between the first electrode and the second electrode, a first electrode tab connected to the first electrode, and a second electrode tab connected to the second electrode. The first electrode tab includes a first portion connected to the first electrode and a second portion, which is not the first portion, the width of the first portion being less than the width of the second portion.Type: ApplicationFiled: January 24, 2008Publication date: December 3, 2009Inventors: Jeon Keun Oh, Eun Joo Lee, Jae Myoung Lee, Ghi Soo Han
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Publication number: 20090237030Abstract: The present invention relates to a charge equalization apparatus, which allows the primary and secondary windings of a transformer to be easily fabricated, can control the flow of charge to batteries depending on the charged states of series-connected batteries, and can prevent overcurrent from flowing into a battery currently being charged.Type: ApplicationFiled: June 13, 2007Publication date: September 24, 2009Applicants: SK Energy Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Jeon Keun Oh, Joong Hui Lee, Soo Yeup Jang, Gun Woo Moon, Chong Eun Kim, Hong Sun Park
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Publication number: 20080299449Abstract: The present invention relates to a cooling structure of a lithium ion secondary battery system. The cooling structure of a lithium ion secondary battery system according to the present invention provides cooling channels for lithium battery unit cells accommodated by a laterally partitioned arrangement of main frames, each having a heat radiation part and lattice-shaped paths, and partitioning frames, and allows air, blown by a cooling fan, to cool the lithium battery unit cells while passing through the cooling channels and the lattice-shaped paths. Each of the main frames has a pair of passage slots formed in both sides thereof to allow the air blown by the cooling fan to be directly blown to each accommodated lithium battery unit cell, thus forming each secondary cooling channel communicating with the pair of passage slots.Type: ApplicationFiled: January 3, 2007Publication date: December 4, 2008Applicant: SK ENERGY CO., LTD.Inventors: Jung Sik Yun, Jeon Keun Oh, Yu Rim Do
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Publication number: 20080290877Abstract: The present invention relates to an apparatus and method for testing batteries, which can prevent errors from occurring due to the tolerance of voltage sensors when the charged states of batteries are measured, and can charge a battery having a charged state deteriorated due to the difference in the resistance of each battery. The apparatus includes a voltage circuit for measuring voltages of N batteries. A resistance circuit decreases voltages of batteries, which are greater than a reference voltage. A connection switch unit selects any one of the N batteries. A divert change unit separates polarities of each battery and changes positions of an cathode and a anode of the battery depending on separated polarities. A selection switch unit selectively connects the cathode and anode of the battery to an cathode and a anode of the voltage circuit or the resistance circuit.Type: ApplicationFiled: November 24, 2006Publication date: November 27, 2008Applicant: SK Energy Co., Ltd.Inventors: Jeon Keun Oh, Joong Hui Lee, Soo Yeup Jang
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Patent number: 7417004Abstract: This invention relates to a catalyst for synthesis of dimethyl ether and its preparation methods. More specifically, this invention relates to a catalyst with improved formulation for a highly efficient synthesis of dimethyl ether via dehydration of methanol. These catalysts are composed of hydrophobic zeolites, cations selected from alkali metal, alkaline earth metal, or ammonium along with alumina, silica, or silica-alumina.Type: GrantFiled: August 30, 2004Date of Patent: August 26, 2008Assignee: SK Energy Co., Ltd.Inventors: Ki-Won Jun, Hyun-Seog Roh, Jae-Woo Kim, Jeon Keun Oh, Jin Hwan Bang
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Publication number: 20080193838Abstract: Disclosed herein is a case which protects a plurality of flexible lithium polymer unit cells, has a compact structure to reduce volume, has a simple assembly process, and minimizes heat generated during a high-power charging or discharging operation. The battery case includes a pouch support frame to support a pouch of a unit cell having the pouch and electrode terminals. A heat radiating part having the shape of a shelf is provided on a surface of the pouch support frame, and defines a space for dispersing heat generated from the pouch. A terminal support having the shape of a wall is provided on an edge of the heat radiating part, thus supporting the electrode terminals of the unit cell.Type: ApplicationFiled: March 22, 2006Publication date: August 14, 2008Applicant: SK ENERGY CO., LTDInventor: Jeon-keun Oh
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Publication number: 20080187828Abstract: A lithium secondary battery includes an electrode assembly having at least one tab which projects from one side of the electrode assembly, an external finishing material surrounding and sealing the tab except a distal end portion thereof and the electrode assembly, and polymer films interposed between the external finishing material and the tab to improve adhesion therebetween. When the tab has a thickness no less than a predetermined thickness, the tab is formed to have a sectional shape which ensures that an inside angle defined by one of upper and lower surfaces of the tab and an adjacent side surface of the tab becomes an obtuse angle, and the polymer films are formed to have protuberances on the inner surfaces thereof, so as to improve bondability between the tab and the polymer films.Type: ApplicationFiled: May 9, 2006Publication date: August 7, 2008Applicant: SK Energy Co., LTDInventors: Jeon Keun Oh, Eun Sung Park, Eun Joo Lee
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Publication number: 20080160400Abstract: Disclosed herein is a structure of layering unit cells for a lithium polymer battery, in which electrode terminals are provided on surfaces of the respective unit cells for the lithium polymer battery, and are alternately layered, thus allowing the unit cells to be connected in series through only a layering operation without an additional connecting device. The battery system includes first and second unit cells each having a pouch and anode and cathode terminals which are connected to a surface of the pouch and are oppositely bent in upward and downward directions. In this case, the cathode terminal of the second unit cell is directly connected to the anode terminal of the first unit cell.Type: ApplicationFiled: March 22, 2006Publication date: July 3, 2008Applicant: SK ENERGY CO., LTDInventor: Jeon-Keun Oh
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Publication number: 20070166611Abstract: Disclosed herein are a high power lithium unit cell and a high power lithium battery pack having the high power lithium unit cell. The present invention increases the width of an electrode terminal of a lithium battery, thus reducing heat generation and a potential drop due to resistance of the electrode terminal, therefore efficiently eliminating the generated heat.Type: ApplicationFiled: December 12, 2005Publication date: July 19, 2007Applicant: SK CORPORATIONInventors: Jeon-keun Oh, Joong-Hul Lee, Eun Park
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Publication number: 20070149432Abstract: Disclosed is a cleaning agent for heater tubes, which is capable of eliminating deposits such as soot particulates in tubes installed in industrial heaters that typically use oil, coal or gas. The cleaning agent of the present invention is prepared by formulating a chemical composition comprising ammonium nitrate into pellets. Also, the present invention discloses a method of cleaning heater tubes using the cleaning agent. When being utilized for cleaning the heater tubes, the cleaning agent can improve mechanical and chemical cleaning effects, thus shortening of working time and reducing a required amount of the chemical composition, as well as preventing rapid evaporation of the chemical composition, thus increasing cleaning effect. In addition, the cleaning agent can eliminate the cementing effect of sulfur oxides or vanadic oxides in the heater tubes and thus control stably emission of NOx, by selectively containing other additives including magnesium and urea.Type: ApplicationFiled: February 20, 2007Publication date: June 28, 2007Inventors: Jeon-Keun Oh, Wha-Sik Min, Sam-Ryong Park, Gi-Won Park
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Publication number: 20070117709Abstract: This invention relates to a catalyst for synthesis of dimethyl ether and its preparation methods. More specifically, this invention relates to a catalyst with improved formulation for a highly efficient synthesis of dimethyl ether via dehydration of methanol. These catalysts are composed of hydrophobic zeolites, cations selected from alkali metal, alkaline earth metal, or ammonium along with alumina, silica, or silica-alumina.Type: ApplicationFiled: August 30, 2004Publication date: May 24, 2007Inventors: Ki-Won Jun, Hyun-Seog Roh, Jae-Woo Kim, Jeon-Keun Oh, Jin Bang
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Patent number: 7189289Abstract: Disclosed is a cleaning agent for heater tubes, which is capable of eliminating deposits such as soot particulates in tubes installed in industrial heaters that typically use oil, coal or gas. The cleaning agent of the present invention is prepared by formulating a chemical composition comprising ammonium nitrate into pellets. Also, the present invention discloses a method of cleaning heater tubes using the cleaning agent. When being utilized for cleaning the heater tubes, the cleaning agent can improve mechanical and chemical cleaning effects, thus shortening of working time and reducing a required amount of the chemical composition, as well as preventing rapid evaporation of the chemical composition, thus increasing cleaning effect. In addition, the cleaning agent can eliminate the cementing effect of sulfur oxides or vanadic oxides in the heater tubes and thus control stably emission of NOx, by selectively containing other additives including magnesium and urea.Type: GrantFiled: February 6, 2003Date of Patent: March 13, 2007Assignee: SK CorporationInventors: Jeon-Keun Oh, Wha-Sik Min, Sam-Ryong Park, Gi-Won Park
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Publication number: 20050143279Abstract: Disclosed is a cleaning agent for heater tubes, which is capable of eliminating deposits such as soot particulates in tubes installed in industrial heaters that typically use oil, coal or gas. The cleaning agent of the present invention is prepared by formulating a chemical composition comprising ammonium nitrate into pellets. Also, the present invention discloses a method of cleaning heater tubes using the cleaning agent. When being utilized for cleaning the heater tubes, the cleaning agent can improve mechanical and chemical cleaning effects, thus shortening of working time and reducing a required amount of the chemical composition, as well as preventing rapid evaporation of the chemical composition, thus increasing cleaning effect. In addition, the cleaning agent can eliminate the cementing effect of sulfur oxides or vanadic oxides in the heater tubes and thus control stably emission of NOx, by selectively containing other additives including magnesium and urea.Type: ApplicationFiled: February 6, 2003Publication date: June 30, 2005Inventors: Jeon-Keun Oh, Wha-Sim Min, Sam-Ryong Park, Gi-Won Park