Patents by Inventor Ju-Ri Kim
Ju-Ri 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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Publication number: 20250258244Abstract: A method for diagnosing a battery assembly according to one aspect of the present disclosure diagnoses a battery assembly including a battery bank comprising a plurality of battery cells connected in parallel with each other, and the method includes generating a differential profile representing a relationship between a differential capacity, which is obtained by differentiating a capacity of the battery bank with respect to a voltage of the battery bank, and the voltage of the battery bank; and diagnosing a state of the battery bank based on a difference value between a differential capacity value of a target peak located in a predetermined voltage section among a plurality of peaks of the differential profile and a differential capacity value of a valley adjacent to the target peak.Type: ApplicationFiled: February 7, 2025Publication date: August 14, 2025Inventors: Min-Seok KIM, Ju-Ri KIM, Yoon-Jung BAE, Hee-Seok JEONG
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Publication number: 20250258243Abstract: A method for diagnosing a battery assembly according to one aspect of the present disclosure diagnoses a battery assembly including a battery bank provided by connecting a plurality of battery cells in parallel with each other, and the method includes generating a second differential profile representing a relationship between a second differential capacity, which is obtained by taking a second derivative of a capacity of the battery bank with respect to a voltage of the battery bank, and the voltage of the battery bank; and detecting a target peak located in a predetermined voltage section among a plurality of peaks of the second differential profile and diagnosing a state of the battery bank based on a second differential capacity value of the target peak.Type: ApplicationFiled: February 6, 2025Publication date: August 14, 2025Inventors: Min-Seok KIM, Ju-Ri KIM, Yoon-Jung BAE, Hee-Seok JEONG
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Publication number: 20250251463Abstract: A battery diagnosing apparatus according to one embodiment of the present disclosure includes: a profile acquisition unit that acquires a battery profile representing a correspondence between a voltage and a capacity of a battery; and a control unit that divides a capacity section of the battery profile into a plurality of sections, derives a target value for one target index related to a differential capacity peak or a charging end voltage among a plurality of diagnosis indices set in advance, from each of the divided sections, compares a correspondence between the derived plurality of target values with a preset reference profile that represents a correspondence between a plurality of target indices, and diagnoses a state of the battery based on a result of the comparison.Type: ApplicationFiled: January 31, 2025Publication date: August 7, 2025Inventors: Yoon-Jung Bae, Ju-Ri Kim, Tae-In Kim, Seon-Ho Pak, Kyung-Eun Sun, Hee-Seok Jeong
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Patent number: 12132200Abstract: The present disclosure provides a positive electrode for a secondary battery which includes a positive electrode active material and a lithium-based alloy. Also, the present disclosure provides a method of preparing the positive electrode for a secondary battery which includes the steps of forming a positive electrode material mixture layer including a positive electrode active material and forming a coating layer including a lithium-based alloy on the positive electrode material mixture layer, or forming a positive electrode material mixture layer by coating a positive electrode collector with a slurry for forming a positive electrode, which includes a positive electrode active material and a lithium-based alloy, and rolling the positive electrode collector.Type: GrantFiled: September 6, 2019Date of Patent: October 29, 2024Assignee: LG Energy Solution, Ltd.Inventors: Ju Ri Kim, Seok Koo Kim, Sun Kyu Kim, Young Sik Kim, Jooyong Song, Hyun Woo Kim, Young Jun Lim
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Patent number: 11876229Abstract: Disclosed is a negative electrode including: a current collector; a negative electrode active material layer disposed on at least one surface of the current collector, including a silicon-based active material and a conductive material, and containing no binder polymer; and a coating layer disposed on the surface of the negative electrode active material layer and in at least a part of the inside of the pores of the negative electrode active material layer, and containing a coating layer polymer forming a chemical bond with silicon (Si) of the silicon-based active material, wherein the content of the coating layer polymer is 0.3-2 parts by weight based on 100 parts by weight of the negative electrode active material layer, and the coating layer polymer is a mixture of polyacrylic acid with polyvinyl alcohol.Type: GrantFiled: January 28, 2020Date of Patent: January 16, 2024Assignee: LG Energy Solution, Ltd.Inventors: Ji-Won Min, Seok-Koo Kim, Joon Kwon, Sun-Kyu Kim, Ju-Ri Kim, Kyung-Eun Sun
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Publication number: 20230291017Abstract: A flexible printed circuit board for pouch cell internal pressure measurement includes a sensing part on which a pressure sensor is mounted; a board part provided with connector pins connected to a plurality of conductor lines, respectively; and an extension part extending from the sensing part to the board part. The extension part includes a protective sheath of a metal material that surrounds an outer surface of an insulating film in a predetermined section.Type: ApplicationFiled: December 14, 2021Publication date: September 14, 2023Applicant: LG Energy Solution, Ltd.Inventors: Ki-Young Lee, Dong-Wan Ko, Do-Yul Kim, Ju-Ri Kim
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Patent number: 11658285Abstract: A method of manufacturing a negative electrode for a secondary battery includes a first step of preparing a lithium metal sheet coated with a lithium metal or to which the lithium metal is adhered in a form of a thin film on a release film and wound into a roll, a second step of laminating the lithium metal sheet to allow the lithium metal to be adjacent to a negative electrode material mixture, to thereby manufacture a negative electrode in which lithium metal is laminated and a third step of applying pressure to the negative electrode. The release film is coated with silicon. The negative electrode manufacturing method uniformly laminates or bonds lithium metal which is difficult to handle on the negative electrode material mixture of the secondary battery and advantageously enhances the speed of the pre-lithiation by using the patterned lithium metal.Type: GrantFiled: April 5, 2019Date of Patent: May 23, 2023Assignee: LG ENERGY SOLUTION, LTD.Inventors: Ju Ri Kim, In Chul Kim, Joo Yong Song, Seok Koo Kim
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Publication number: 20230078943Abstract: A negative electrode, a method for manufacturing the negative electrode, a secondary battery, and a method for manufacturing the secondary battery, wherein the negative electrode includes a negative electrode current collector, and a negative electrode active material layer. The negative electrode active material layer includes a first negative electrode active material layer on at least one surface of the negative electrode current collector and a second negative electrode active material layer on the first negative electrode active material layer. The first negative electrode active material layer includes ethylene carbonate.Type: ApplicationFiled: May 3, 2021Publication date: March 16, 2023Applicant: LG ENERGY SOLUTION, LTD.Inventors: Ji Hoon RYU, Ju Ri KIM, Hyun Min KIM
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Patent number: 11424474Abstract: The present invention relates to an apparatus for manufacturing a secondary battery, the apparatus comprising a radical unit sheet supply part that supplies a semi-finished radical unit sheet on which a first electrode sheet is laminated on an outermost portion thereof, a film sheet supply part that supplies a film sheet coated with a stabilized lithium metal power (SLMP) layer to attach the film sheet to each of top and bottom surfaces of the semi-finished radical unit sheet, a film sheet pressing part that allows the SLMP layer applied to the film sheet to be bonded to each of the top and bottom surfaces of the semi-finished radical unit sheet, and a film sheet removing part that removes the film sheet from the SLMP layer bonded to the semi-finished radical unit sheet to manufacture a finished radical unit sheet.Type: GrantFiled: February 28, 2018Date of Patent: August 23, 2022Assignee: LG ENERGY SOLUTION, LTD.Inventors: In Chul Kim, Seok Koo Kim, Ju Ri Kim, Jooyong Song
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Publication number: 20220255059Abstract: The technology relates to a negative electrode for a secondary battery, and a secondary battery including same. The negative electrode comprises a composite material layer having a double-layer structure, but includes silicon oxide and carbon nanotubes in only one layer, such that it is possible to increase the capacity of a battery while preventing structural deterioration of the negative electrode due to changes in electrode volume during charging and discharging.Type: ApplicationFiled: January 25, 2021Publication date: August 11, 2022Applicant: LG ENERGY SOLUTION, LTD.Inventors: Ki Won SUNG, Eun Ju LEE, Ju Ri KIM
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Publication number: 20220052345Abstract: Disclosed is a negative electrode including: a current collector; a negative electrode active material layer disposed on at least one surface of the current collector, including a silicon-based active material and a conductive material, and containing no binder polymer; and a coating layer disposed on the surface of the negative electrode active material layer and in at least a part of the inside of the pores of the negative electrode active material layer, and containing a coating layer polymer forming a chemical bond with silicon (Si) of the silicon-based active material, wherein the content of the coating layer polymer is 0.3-2 parts by weight based on 100 parts by weight of the negative electrode active material layer, and the coating layer polymer is a mixture of polyacrylic acid with polyvinyl alcohol.Type: ApplicationFiled: January 28, 2020Publication date: February 17, 2022Applicant: LG CHEM, LTD.Inventors: Ji-Won MIN, Seok-Koo KIM, Joon KWON, Sun-Kyu KIM, Ju-Ri KIM, Kyung-Eun SUN
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Publication number: 20210242457Abstract: A negative electrode for a lithium secondary battery including a current collector; a negative electrode mixture layer disposed on at least one surface of the current collector; a lithium diffusion rate-controlling layer formed on a surface of the negative electrode mixture layer by atomic layer deposition opposite the current collector; and a lithium layer disposed on a surface of the lithium diffusion rate-controlling layer opposite the negative electrode mixture layer. A method for prelithiating the negative electrode for a lithium secondary battery and a method for manufacturing a lithium secondary battery comprising the negative electrode. The negative electrode includes a lithium diffusion rate-controlling layer between a lithium thin film and a negative electrode mixture layer, and thereby can control the lithium diffusion rate during a prelithiation process and inhibit lithium loss or side reactions of lithium, thus enhancing cycle characteristics.Type: ApplicationFiled: September 26, 2019Publication date: August 5, 2021Applicant: LG CHEM, LTD.Inventors: Yeon Suk HONG, Ju Ri KIM
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Publication number: 20210234160Abstract: The present disclosure provides a positive electrode for a secondary battery which includes a positive electrode active material and a lithium-based alloy. Also, the present disclosure provides a method of preparing the positive electrode for a secondary battery which includes the steps of forming a positive electrode material mixture layer including a positive electrode active material and forming a coating layer including a lithium-based alloy on the positive electrode material mixture layer, or forming a positive electrode material mixture layer by coating a positive electrode collector with a slurry for forming a positive electrode, which includes a positive electrode active material and a lithium-based alloy, and rolling the positive electrode collector.Type: ApplicationFiled: September 6, 2019Publication date: July 29, 2021Applicants: LG Chem, Ltd., UNIST (Ulsan National Institute of Science and Technology)Inventors: Ju Ri Kim, Seok Koo Kim, Sun Kyu Kim, Young Sik Kim, Jooyong Song, Hyun Woo Kim, Young Jun Lim
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Patent number: 10910637Abstract: Provided are a positive electrode and a lithium secondary battery which have high energy capacity and include a nickel-containing positive electrode active material, and an additive including metal particles and lithium oxide.Type: GrantFiled: June 27, 2018Date of Patent: February 2, 2021Inventors: Jooyong Song, Seok Koo Kim, In Chul Kim, Ju Ri Kim, Myung Ki Lee
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Patent number: 10811687Abstract: The present invention relates to a secondary battery electrode including: a collector positioned between an external wire and an electrode active material to transfer electrons; and an electrode mixture layer coated on the collector, wherein the electrode mixture layer includes a cross-linked polymer, an electrode active material, and a binder, and the cross-linked polymer is formed by a cross-linked bond between a first polymerization unit and a second polymerization unit to have an interpenetrating polymer network (IPN), and a manufacturing method thereof.Type: GrantFiled: November 23, 2016Date of Patent: October 20, 2020Assignee: LG Chem, Ltd.Inventors: Hyun Min Kim, Hee Seok Jeong, Ju Ri Kim, Sei Woon Oh
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Patent number: 10784490Abstract: The present invention provides a battery cell including: an electrode assembly having a structure in which a positive electrode, a negative electrode, and a separator are laminated, each of the positive electrode and the negative electrode having 2×n (n?2), wherein a positive tab is provided in each of odd-numbered sides, and a negative electrode tab is provided in each of even-numbered sides, and the positive electrodes and the negative electrode tabs are alternately formed along the sides; electrode terminals respectively disposed on a first side and a second side of the electrode assembly, in which outermost electrodes are disposed, or third sides which are side surfaces of the electrode assembly, being perpendicular to the first side and the second side, and a battery case having a structure of surrounding an external surface of the electrode assembly.Type: GrantFiled: October 13, 2016Date of Patent: September 22, 2020Assignee: LG Chem, Ltd.Inventors: Hee Seok Jeong, Hyun Min Kim, Ju Ri Kim, Sei Woon Oh
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Publication number: 20200227729Abstract: Provided are a positive electrode and a lithium secondary battery which have high energy capacity and include a nickel-containing positive electrode active material, and an additive including metal particles and lithium oxide.Type: ApplicationFiled: June 27, 2018Publication date: July 16, 2020Applicant: LG Chem, Ltd.Inventors: Jooyong Song, Seok Koo Kim, In Chul Kim, Ju Ri Kim, Myung Ki Lee
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Publication number: 20200083555Abstract: The present invention relates to an apparatus for manufacturing a secondary battery, the apparatus comprising a radical unit sheet supply part that supplies a semi-finished radical unit sheet on which a first electrode sheet is laminated on an outermost portion thereof, a film sheet supply part that supplies a film sheet coated with a stabilized lithium metal power (SLMP) layer to attach the film sheet to each of top and bottom surfaces of the semi-finished radical unit sheet, a film sheet pressing part that allows the SLMP layer applied to the film sheet to be bonded to each of the top and bottom surfaces of the semi-finished radical unit sheet, and a film sheet removing part that removes the film sheet from the SLMP layer bonded to the semi-finished radical unit sheet to manufacture a finished radical unit sheet.Type: ApplicationFiled: February 28, 2018Publication date: March 12, 2020Inventors: In Chul Kim, Seok Koo Kim, Ju Ri Kim, Jooyong Song
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Publication number: 20190237750Abstract: A method of manufacturing a negative electrode for a secondary battery includes a first step of preparing a lithium metal sheet coated with a lithium metal or to which the lithium metal is adhered in a form of a thin film on a release film and wound into a roll, a second step of laminating the lithium metal sheet to allow the lithium metal to be adjacent to a negative electrode material mixture, to thereby manufacture a negative electrode in which lithium metal is laminated and a third step of applying pressure to the negative electrode. The release film is coated with silicon. The negative electrode manufacturing method uniformly laminates or bonds lithium metal which is difficult to handle on the negative electrode material mixture of the secondary battery and advantageously enhances the speed of the pre-lithiation by using the patterned lithium metal.Type: ApplicationFiled: April 5, 2019Publication date: August 1, 2019Applicant: LG CHEM, LTD.Inventors: Ju Ri KIM, In Chul KIM, Joo Yong SONG, Seok Koo KIM
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Publication number: 20180261844Abstract: The present invention relates to a secondary battery electrode including: a collector positioned between an external wire and an electrode active material to transfer electrons; and an electrode mixture layer coated on the collector, wherein the electrode mixture layer includes a cross-linked polymer, an electrode active material, and a binder, and the cross-linked polymer is formed by a cross-linked bond between a first polymerization unit and a second polymerization unit to have an interpenetrating polymer network (IPN), and a manufacturing method thereof.Type: ApplicationFiled: November 23, 2016Publication date: September 13, 2018Applicant: LG Chem, Ltd.Inventors: Hyun Min Kim, Hee Seok Jeong, Ju Ri Kim, Sei Woon Oh