Patents by Inventor Sun-hwak Woo
Sun-hwak Woo 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: 11532805Abstract: SUMMARY A method of preparing an electrode for a secondary battery according to an embodiment of the present disclosure includes the steps of: injecting a first slurry prepared by dissolving a first active material in a first solvent and a second slurry prepared by dissolving a second active material in a second solvent into a single coating device; and coating the first slurry and the second slurry onto a current collector through the single coating device, wherein the first solvent and the second solvent have different physical properties, and form a layered structure of a first layer including the first slurry and a second layer including the second slurry on the current collector, respectively.Type: GrantFiled: January 20, 2020Date of Patent: December 20, 2022Inventors: Sei Woon Oh, Minkyung Kim, Yeo Kyung Yoon, Sun Hwak Woo
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Patent number: 11394016Abstract: A punching system for an electrode base material is disclosed, in which the electrode base material coated with an active material on a surface of a collector is molded or cut in a predetermined shape. The punching system comprises: an unwinder on which the electrode base material in the form of a roll is mounted and around which the electrode base material is unwound; a punching device spaced a predetermined distance from the unwinder, the punching device being configured to mold or cut the electrode base material supplied from the unwinder in a predetermined shape; and a curl correcting device disposed between the unwinder and the punching device to inject or suction air onto a surface of the electrode base material while the electrode base material moves to the punching device so as to planarize the electrode base material. A punching method for an electrode base material is also disclosed.Type: GrantFiled: July 1, 2019Date of Patent: July 19, 2022Inventors: Min Kyung Kim, Sei Woon Oh, Sun Hwak Woo, Jin Seo Park
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Publication number: 20220184875Abstract: The present invention provides a manufacturing device of a battery case including a first mold including a first space part having a shape corresponding to a storage part formed therein; a second mold including a second space part having a shape corresponding to the storage part and a through-hole communicating with the second space part formed therein, and coupled to the first mold with a laminate sheet interposed therebetween; and an air pressure regulator mounted in the through-hole in a state in which the first space part and the second space part are isolated from the outside, and increasing or decreasing an air pressure of the second space part through the through-hole to stretch and modify the laminate sheet into a shape corresponding to the first space part or the second space part.Type: ApplicationFiled: March 4, 2022Publication date: June 16, 2022Applicant: LG Energy Solution, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo, Yeo Kyung Yoon, Eun Ju Lee, Ji Eun Lee, Soo Ji Hwang
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Patent number: 11305476Abstract: The present invention provides a manufacturing device of a battery case including a first mold including a first space part having a shape corresponding to a storage part formed therein; a second mold including a second space part having a shape corresponding to the storage part and a through-hole communicating with the second space part formed therein, and coupled to the first mold with a laminate sheet interposed therebetween; and an air pressure regulator mounted in the through-hole in a state in which the first space part and the second space part are isolated from the outside, and increasing or decreasing an air pressure of the second space part through the through-hole to stretch and modify the laminate sheet into a shape corresponding to the first space part or the second space part.Type: GrantFiled: March 13, 2017Date of Patent: April 19, 2022Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo, Yeo Kyung Yoon, Eun Ju Lee, Ji Eun Lee, Soo Ji Hwang
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Patent number: 11205771Abstract: The present invention provides a method for preparing an electrode for a secondary battery, including the steps of: (i) mixing and kneading an active material, a binder, and a conductive material together with a solvent to prepare a slurry in the form of a paste having a solid content of 70 to 90 wt %; (ii) positioning the slurry in the form of a paste on a current collector; and (iii) passing the current collector through a rolling apparatus together with the slurry in the form of a paste to simultaneously press it while forming an electrode coating layer on the current collector.Type: GrantFiled: November 30, 2018Date of Patent: December 21, 2021Inventors: Sei Woon Oh, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
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Publication number: 20210391565Abstract: SUMMARY A method of preparing an electrode for a secondary battery according to an embodiment of the present disclosure includes the steps of: injecting a first slurry prepared by dissolving a first active material in a first solvent and a second slurry prepared by dissolving a second active material in a second solvent into a single coating device; and coating the first slurry and the second slurry onto a current collector through the single coating device, wherein the first solvent and the second solvent have different physical properties, and form a layered structure of a first layer including the first slurry and a second layer including the second slurry on the current collector, respectively.Type: ApplicationFiled: January 20, 2020Publication date: December 16, 2021Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Minkyung Kim, Yeo Kyung Yoon, Sun Hwak Woo
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Publication number: 20210336272Abstract: The present invention provides a one-sided electrode for a secondary battery comprising a current collector, an electrode mixture layer applied to one surface of the current collector, and an electrode distortion-preventing layer formed on the other surface of the current collector to which no electrode mixture is applied. The one-sided electrode according to the present invention exhibits significantly reduced warping or curling after a rolling process and has the advantages of facilitating subsequent processes and enabling enhanced productivity.Type: ApplicationFiled: July 2, 2021Publication date: October 28, 2021Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Yeo Kyung Yoon, Sun Hwak Woo, Yu Ra Jeong
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Patent number: 11069943Abstract: Disclosed herein is an electrode assembly configured to have a rectangular structure including two long sides and two short sides when viewed in a plan view, wherein the electrode assembly includes positive electrode tabs protruding from two or more regions of a first long side that are spaced apart from each other, the first long side being one of the two long sides, and negative electrode tabs protruding from two or more regions of a second long side that are spaced apart from each other, the second long side being the other of the two long sides, and wherein the positive electrode tabs are coupled to a positive electrode lead located at the first long side whereas the negative electrode tabs are coupled to a negative electrode lead located at the second long side.Type: GrantFiled: November 6, 2017Date of Patent: July 20, 2021Inventors: Sei-Woon Oh, Hyun-Min Kim, Seong-Yoon Lim, Sun-Hwak Woo
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Patent number: 10978683Abstract: The present invention provides a method of manufacturing n battery cells (n?2), each including a respective reference electrode for measuring a relative electrode potential, including: (i) manufacturing a reference cell composed of an electrolyte solution, the reference electrodes, and a lithium electrode; (ii) charging the reference cell; (iii) charging the reference cell to 40% to 60% of a capacity discharged in the process (ii), thereby performing formation on the reference electrodes; (iv) manufacturing the n battery cells, each of the battery cells including a respective one of the reference electrodes, an electrode assembly, the electrolyte solution and a battery case; and (v) in each of the battery cells, measuring a relative potential of the respective one of the reference electrodes and a positive electrode of the respective electrode assembly, and a relative potential of the respective one of the reference electrodes and a negative electrode of the respective electrode assembly.Type: GrantFiled: August 18, 2016Date of Patent: April 13, 2021Inventors: Ji Won Min, Sun Hwak Woo, Seok Koo Kim, Sei Woon Oh, Eun Ju Lee
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Patent number: 10933575Abstract: An apparatus and method are provided for forming a pouch case with improved forming quality and minimized surface contact between the forming apparatus and the pouch case in the forming process to form a pouch cup. The apparatus includes a mold on which a pouch case with a plate shape can be placed, wherein the mold bulges upwards, a chamber open at bottom to the pouch case and the mold, the chamber having an inner space in which the mold can be received by lift-up of the mold or lift-down of the chamber, wherein the chamber is seated on an edge portion of the pouch case, and the chamber is equipped with a fluid input valve at top and a fluid output valve at bottom, and a fluid supply unit configured to supply a fluid via the fluid input valve to carry out pressure forming of the pouch case.Type: GrantFiled: April 11, 2017Date of Patent: March 2, 2021Inventors: Sei-Woon Oh, Sun-Hwak Woo, Soo-Ji Hwang, Hyun-Min Kim, Eun-Ju Lee
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Publication number: 20210036272Abstract: A rechargeable battery includes an electrode assembly; a case having a sealing portion surrounding the electrode assembly; and a lead electrically connected to the electrode assembly and extending in a first direction, wherein the lead includes a first region in contact with the electrode assembly and located inside the case; a second region exposed to an outside of the case; and a third region located between the first region and the second region and overlapping the sealing portion of the case, wherein the third region has a width greater than that of the first region and the second region in a second direction and has a thickness smaller than that of the first region and the second region in a third direction, and wherein the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction.Type: ApplicationFiled: October 19, 2018Publication date: February 4, 2021Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Sung Hwan Cho, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
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Publication number: 20200335766Abstract: The present invention provides a method for preparing an electrode for a secondary battery, including the steps of: (i) mixing and kneading an active material, a binder, and a conductive material together with a solvent to prepare a slurry in the form of a paste having a solid content of 70 to 90 wt %; (ii) positioning the slurry in the form of a paste on a current collector; and (iii) passing the current collector through a rolling apparatus together with the slurry in the form of a paste to simultaneously press it while forming an electrode coating layer on the current collector.Type: ApplicationFiled: November 30, 2018Publication date: October 22, 2020Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
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Patent number: 10811665Abstract: The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.Type: GrantFiled: October 18, 2016Date of Patent: October 20, 2020Assignee: LG Chem, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Eun Ju Lee, Sun Hwak Woo
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Publication number: 20200274136Abstract: A punching system for an electrode base material is disclosed, in which the electrode base material coated with an active material on a surface of a collector is molded or cut in a predetermined shape. The punching system comprises: an unwinder on which the electrode base material in the form of a roll is mounted and around which the electrode base material is unwound; a punching device spaced a predetermined distance from the unwinder, the punching device being configured to mold or cut the electrode base material supplied from the unwinder in a predetermined shape; and a curl correcting device disposed between the unwinder and the punching device to inject or suction air onto a surface of the electrode base material while the electrode base material moves to the punching device so as to planarize the electrode base material. A punching method for an electrode base material is also disclosed.Type: ApplicationFiled: July 1, 2019Publication date: August 27, 2020Applicant: LG Chem, Ltd.Inventors: Min Kyung Kim, Sei Woon Oh, Sun Hwak Woo, Jin Seo Park
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Patent number: 10727541Abstract: The present invention provides a secondary battery in which an electrode assembly is sealed within a battery case together with an electrolyte, wherein a gas-absorbing polymer having an azo group is included in the battery cell so as to absorb gas generated within the battery.Type: GrantFiled: January 6, 2017Date of Patent: July 28, 2020Assignee: LG Chem, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo
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Patent number: 10388946Abstract: Provided is an electrode, comprising: an electrode current collector, a metal nanowire formed on a surface of the electrode current collector, and a conductive layer surrounding the outside of the metal nanowire, wherein a gap is formed between the metal nanowire and the conductive layer, so that the metal nanowire and the conductive layer are spaced apart from each other without direct contact between them.Type: GrantFiled: January 11, 2016Date of Patent: August 20, 2019Assignee: LG CHEM, LTDInventors: Sun-Hwak Woo, Young-Geun Choi, Hye-Bin Kim, Ji-Hye Yang
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Publication number: 20190252737Abstract: The present invention provides a secondary battery in which an electrode assembly is sealed within a battery case together with an electrolyte, wherein a gas-absorbing polymer having an azo group is included in the battery cell so as to absorb gas generated within the battery.Type: ApplicationFiled: January 6, 2017Publication date: August 15, 2019Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo
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Publication number: 20190181415Abstract: Disclosed herein is an electrode assembly configured to have a rectangular structure including two long sides and two short sides when viewed in a plan view, wherein the electrode assembly includes positive electrode tabs protruding from two or more regions of a first long side that are spaced apart from each other, the first long side being one of the two long sides, and negative electrode tabs protruding from two or more regions of a second long side that are spaced apart from each other, the second long side being the other of the two long sides, and wherein the positive electrode tabs are coupled to a positive electrode lead located at the first long side whereas the negative electrode tabs are coupled to a negative electrode lead located at the second long side.Type: ApplicationFiled: November 6, 2017Publication date: June 13, 2019Applicant: LG Chem, Ltd.Inventors: Sei-Woon Oh, Hyun-Min Kim, Seong-Yoon Lim, Sun-Hwak Woo
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Publication number: 20180264708Abstract: The present invention provides a manufacturing device of a battery case including a first mold including a first space part having a shape corresponding to a storage part formed therein; a second mold including a second space part having a shape corresponding to the storage part and a through-hole communicating with the second space part formed therein, and coupled to the first mold with a laminate sheet interposed therebetween; and an air pressure regulator mounted in the through-hole in a state in which the first space part and the second space part are isolated from the outside, and increasing or decreasing an air pressure of the second space part through the through-hole to stretch and modify the laminate sheet into a shape corresponding to the first space part or the second space part.Type: ApplicationFiled: March 13, 2017Publication date: September 20, 2018Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo, Yeo Kyung Yoon, Eun Ju Lee, Ji Eun Lee, Soo Ji Hwang
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Publication number: 20180269458Abstract: The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.Type: ApplicationFiled: October 18, 2016Publication date: September 20, 2018Applicant: LG Chem, Ltd.Inventors: Sei Woon Oh, Hyun Min Kim, Eun Ju Lee, Sun Hwak Woo