Patents by Inventor Jun Tak Kim
Jun Tak Kim 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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Patent number: 12244021Abstract: Disclosed are a fuel cell catalyst of which only a portion, which has relatively low catalytic activity and in which the greatest amount of platinum elution occurs and platinum oxide is easily formed, is selectively coated with a protective layer, and thus degradation due to the long-term operation of a fuel cell can be effectively prevented while also minimizing a deterioration in catalytic activity; a manufacturing method therefor; and a membrane-electrode assembly including same. The fuel cell catalyst of the present invention comprises: a nanoparticle containing platinum; and a protective layer which is selectively coated on only a portion of the surface of the nanoparticle and can suppress the oxidation of the platinum through electronic interaction with the nanoparticle.Type: GrantFiled: June 26, 2020Date of Patent: March 4, 2025Assignees: KOLON INDUSTRIES, INC., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Jun Young Kim, Nak-Won Kong, Kah-Young Song, Hee-Tak Kim, Dong Wook Lee
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Publication number: 20250070593Abstract: A device for controlling a line connection type fuel cell system and a method for the same are provided. The device for controlling a line connection type fuel cell system includes a plurality of fuel cell modules, an Alternating Current (AC) voltage generator, and a controller to activate the AC voltage generator to generate an AC voltage corresponding to power supplied from a system, and to control the plurality of fuel cell modules to generate a current in synchronization with the AC voltage.Type: ApplicationFiled: November 12, 2024Publication date: February 27, 2025Inventors: Yong Doo Son, Jung Tak Kang, Won Jung Kim, Jun Seok Seo
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Patent number: 12222798Abstract: A method of managing system health is provided. The method includes calculating a reconstruction missing value with respect to the second domain data, determining a degree of degradation of the system on the basis of the reconstruction missing value, predicting a second remaining useful life (RUL) prediction value {tilde over (y)} of the system on the basis of the second domain data, based on a result of the determination of the degree of degradation, optimizing a degradation compensation function on the basis of a distribution of a first RUL prediction value y of the system predicted based on the first domain data in a pre-learning process of the diagnosis model, and predicting a final RUL prediction value {tilde over (y)}? obtained by compensating for the second RUL prediction value {tilde over (y)}, by using the optimized degradation compensation function.Type: GrantFiled: October 13, 2022Date of Patent: February 11, 2025Assignee: Electronics and Telecommunications Research InstituteInventors: Nack Woo Kim, Byung Tak Lee, Jun Gi Lee, Hyun Yong Lee
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Publication number: 20240417821Abstract: A cylindrical battery case for a secondary battery includes a body having a steel sheet including a nickel coating layer formed thereon, a step portion on the body, and a taper and a flange extending from the body. A surface roughness (Ra) of the battery case ranges from 0.022 ?m to 0.040 ?m. Also provided is a device including such a secondary battery. The device is selected from a group consisting of an electronic device, an electric vehicle, a hybrid electric vehicle, and a power storage system.Type: ApplicationFiled: August 27, 2024Publication date: December 19, 2024Inventors: Kwang Su Hwang Bo, Ju Jun Lee, Sang Sok Jung, Jun Tak Kim, Gil Young Lee, Seong Mo Koo
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Patent number: 12091725Abstract: A method of manufacturing a cylindrical battery case includes performing an ironing process, which is one of the processes of manufacturing the battery case, a plurality of times in order to decrease the surface roughness of the battery case, thereby improving the corrosion characteristics of the battery case. The surface roughness of the cylindrical battery case is decreased by performing a thickness reducing process when a process for forming the outer circumferential surface of a body of the cylindrical battery case is performed at the time of manufacturing the cylindrical battery case. In addition, corrosion characteristics are improved for respective values of the surface roughness.Type: GrantFiled: October 23, 2018Date of Patent: September 17, 2024Assignee: LG Energy Solution, Ltd.Inventors: Kwang Su Hwang Bo, Je Jun Lee, Sang Sok Jung, Jun Tak Kim, Gil Young Lee, Seong Mo Koo
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Publication number: 20240139858Abstract: An ultrasonic welding apparatus includes a housing; a horn part coupled to the housing and configured to transmit an ultrasonic wave in one direction; a tip part coupled to the horn part and configured to apply the ultrasonic wave transmitted from the horn part to an object to be welded, and to apply the ultrasonic wave at an angle of 80° or greater and 100° or less with respect to a direction in which the horn part transmits the ultrasonic wave; an anvil part configured to support the object to be welded; and a suction connected to the anvil part and configured to suck a foreign matter generated resulting from ultrasonic welding, in which the tip part is configured to be driven by linear vibration with respect to the object to be welded, and achieves the effects of easily removing foreign matter and improving welding quality.Type: ApplicationFiled: November 18, 2022Publication date: May 2, 2024Applicant: LG Energy Solution, LTD.Inventors: Jun Tak KIM, Jinseo PARK, Kwang Cheol PARK
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Publication number: 20230411811Abstract: A secondary battery includes a jelly roll type electrode assembly in which a first electrode, a second electrode, and a separator are wound together; a battery case that houses the electrode assembly; and a swelling tape attached to the outer peripheral surface of the electrode assembly. The first electrode includes a first electrode current collector and a first active material layer formed by applying an electrode active material onto the first electrode current collector. The first electrode current collector includes an exposed portion exposed to the outer peripheral surface of the electrode assembly. The swelling tape brings the exposed portion into close contact with the inner wall of the battery case.Type: ApplicationFiled: November 3, 2021Publication date: December 21, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Jeong Eon PARK, Do Gyun KIM, Jun Tak KIM, Roun KIM
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Patent number: 11476523Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.Type: GrantFiled: December 26, 2017Date of Patent: October 18, 2022Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
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Patent number: 11367911Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.Type: GrantFiled: December 26, 2017Date of Patent: June 21, 2022Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
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Publication number: 20200335736Abstract: A method of manufacturing a cylindrical battery case includes performing an ironing process, which is one of the processes of manufacturing the battery case, a plurality of times in order to decrease the surface roughness of the battery case, thereby improving the corrosion characteristics of the battery case. The surface roughness of the cylindrical battery case is decreased by performing a thickness reducing process when a process for forming the outer circumferential surface of a body of the cylindrical battery case is performed at the time of manufacturing the cylindrical battery case. In addition, corrosion characteristics are improved for respective values of the surface roughness.Type: ApplicationFiled: October 23, 2018Publication date: October 22, 2020Applicant: LG Chem, Ltd.Inventors: Kwang Su Hwang Bo, Je Jun Lee, Sang Sok Jung, Jun Tak Kim, Gil Young Lee, Seong Mo Koo
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Patent number: 10615381Abstract: The present invention relates to a cap assembly for a secondary battery mounted on an opening of a can. The cap assembly comprises: a top cap; a safety element disposed on a lower portion of the top cap; a safety vent disposed on a lower portion of the safety element; and a gasket surrounding edges of the top cap, the safety element, and the safety vent and mounted on the opening of the can, wherein an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent.Type: GrantFiled: June 27, 2016Date of Patent: April 7, 2020Assignee: LG Chem, Ltd.Inventors: Byoung Kook Lee, Hang Soo Shin, Do Gyun Kim, Je Jun Lee, Jun Tak Kim, Byoung Gu Lee, Sang Suk Jung
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Publication number: 20200035962Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.Type: ApplicationFiled: December 26, 2017Publication date: January 30, 2020Applicant: LG Chem, Ltd.Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
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Publication number: 20190280252Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.Type: ApplicationFiled: December 26, 2017Publication date: September 12, 2019Applicant: LG Chem, Ltd.Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
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Publication number: 20180233713Abstract: A cylindrical battery cell is provided. The cylindrical battery cell configured to have a structure in which a wound type electrode assembly having a positive electrode/separator/negative electrode structure is mounted in a cylindrical can. The cylindrical battery cell includes an inorganic coating portion for accelerating dissipation of heat from the cylindrical can, the inorganic coating portion being provided on at least a part of the outer surface of the cylindrical can.Type: ApplicationFiled: February 13, 2018Publication date: August 16, 2018Applicant: LG CHEM, LTD.Inventors: Byoung Gu LEE, Do Gyun KIM, Jun Tak KIM, Hang Soo SHIN, Byoung Kook LEE, Sang Sok JUNG
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Publication number: 20180062122Abstract: The present invention relates to a cap assembly for a secondary battery mounted on an opening of a can. The cap assembly comprises: a top cap; a safety element disposed on a lower portion of the top cap; a safety vent disposed on a lower portion of the safety element; and a gasket surrounding edges of the top cap, the safety element, and the safety vent and mounted on the opening of the can, wherein an impact absorption part absorbing an impact from the gasket is disposed between an inner wall of the gasket and an outer circumferential surface of the safety vent.Type: ApplicationFiled: June 27, 2016Publication date: March 1, 2018Applicant: LG Chem, Ltd.Inventors: Byoung Kook Lee, Hang Soo Shin, Do Gyun Kim, Je Jun Lee, Jun Tak Kim, Byoung Gu Lee, Sang Suk Jung