Patents by Inventor Sei-Woon Oh

Sei-Woon 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).

  • Publication number: 20220184875
    Abstract: 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: Application
    Filed: March 4, 2022
    Publication date: June 16, 2022
    Applicant: 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
  • Patent number: 11362383
    Abstract: A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are alternately stacked and a battery case accommodating the electrode assembly therein, wherein the battery case comprises a stepped part that is disposed to be stepped, an outer surface of the battery case is sealed to allow a folded part to be seated on the outer surface of the stepped part, and the electrode assembly comprises a stepped protrusion that is stepped in a shape corresponding to an inner surface of the stepped part disposed on the battery case.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: June 14, 2022
    Inventors: Sei Woon Oh, Jung Ah Shim, Hyun Min Kim, Seong Yoon Lim
  • Patent number: 11305476
    Abstract: 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: Grant
    Filed: March 13, 2017
    Date of Patent: April 19, 2022
    Inventors: Sei Woon Oh, Hyun Min Kim, Sun Hwak Woo, Yeo Kyung Yoon, Eun Ju Lee, Ji Eun Lee, Soo Ji Hwang
  • Patent number: 11205771
    Abstract: 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: Grant
    Filed: November 30, 2018
    Date of Patent: December 21, 2021
    Inventors: Sei Woon Oh, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
  • Publication number: 20210391565
    Abstract: 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: Application
    Filed: January 20, 2020
    Publication date: December 16, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Minkyung Kim, Yeo Kyung Yoon, Sun Hwak Woo
  • Publication number: 20210336272
    Abstract: 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: Application
    Filed: July 2, 2021
    Publication date: October 28, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Yeo Kyung Yoon, Sun Hwak Woo, Yu Ra Jeong
  • Patent number: 11069943
    Abstract: 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: Grant
    Filed: November 6, 2017
    Date of Patent: July 20, 2021
    Inventors: Sei-Woon Oh, Hyun-Min Kim, Seong-Yoon Lim, Sun-Hwak Woo
  • Patent number: 10978683
    Abstract: 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: Grant
    Filed: August 18, 2016
    Date of Patent: April 13, 2021
    Inventors: Ji Won Min, Sun Hwak Woo, Seok Koo Kim, Sei Woon Oh, Eun Ju Lee
  • Patent number: 10944135
    Abstract: The present invention provides a battery module including: a battery cell laminate in which a plurality of battery cells having a structure in which an electrode assembly is inside a sealed battery case with an electrolyte solution are arranged with the sides being in contact with each other; and a cooling/buffering member, mounted beneath the battery cell laminate to support a load of the battery cell laminate, and formed of a porous structure to emit heat generated from the battery cell laminate during a charge and discharge process down the battery cell laminate.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: March 9, 2021
    Assignee: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Soo Youl Kim, Hyun Min Kim, Jung Ah Shim
  • Patent number: 10933575
    Abstract: 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: Grant
    Filed: April 11, 2017
    Date of Patent: March 2, 2021
    Inventors: Sei-Woon Oh, Sun-Hwak Woo, Soo-Ji Hwang, Hyun-Min Kim, Eun-Ju Lee
  • Publication number: 20210036272
    Abstract: 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: Application
    Filed: October 19, 2018
    Publication date: February 4, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Sung Hwan Cho, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
  • Publication number: 20200358042
    Abstract: A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are alternately stacked and a battery case accommodating the electrode assembly therein, wherein the battery case comprises a stepped part that is disposed to be stepped, an outer surface of the battery case is sealed to allow a folded part to be seated on the outer surface of the stepped part, and the electrode assembly comprises a stepped protrusion that is stepped in a shape corresponding to an inner surface of the stepped part disposed on the battery case.
    Type: Application
    Filed: July 23, 2020
    Publication date: November 12, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Jung Ah Shim, Hyun Min Kim, Seong Yoon Lim
  • Publication number: 20200335766
    Abstract: 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: Application
    Filed: November 30, 2018
    Publication date: October 22, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Soo Hyun Lim, Sun Hwak Woo, Jinseo Park
  • Publication number: 20200335813
    Abstract: Disclosed is an electrode assembly, including: a positive electrode having a plurality of positive patterns formed by being pattern-coated with a positive active material at a predetermined interval and including positive uncoated regions where the positive active material is not coated; a negative electrode having a plurality of negative patterns formed by being pattern-coated with a negative active material at a predetermined interval and including negative uncoated regions where the negative active material is not coated; and a separator disposed between the positive electrode and the negative electrode, in which the electrode assembly is formed in a zigzag shape by bending the positive uncoated region and the negative uncoated region.
    Type: Application
    Filed: November 2, 2018
    Publication date: October 22, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Yura Jeong, Yeo Kyung Yoon
  • Patent number: 10811665
    Abstract: 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: Grant
    Filed: October 18, 2016
    Date of Patent: October 20, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Hyun Min Kim, Eun Ju Lee, Sun Hwak Woo
  • Patent number: 10811687
    Abstract: 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: Grant
    Filed: November 23, 2016
    Date of Patent: October 20, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyun Min Kim, Hee Seok Jeong, Ju Ri Kim, Sei Woon Oh
  • Patent number: 10804580
    Abstract: The present disclosure discloses a cell assembly including: a plurality of cells arranged at predetermined intervals; and a cushion pad disposed between the cells to be in surface contact with the cells and configured to absorb volumetric expansion of the cells, wherein the cushion pad has a thermal conductivity of 1.5 W/mK or higher.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: October 13, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Soo-Youl Kim, Sei-Woon Oh
  • Patent number: 10790477
    Abstract: A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are alternately stacked and a battery case accommodating the electrode assembly therein, wherein the battery case comprises a stepped part that is disposed to be stepped, an outer surface of the battery case is sealed to allow a folded part to be seated on the outer surface of the stepped part, and the electrode assembly comprises a stepped protrusion that is stepped in a shape corresponding to an inner surface of the stepped part disposed on the battery case.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: September 29, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Sei Woon Oh, Jung Ah Shim, Hyun Min Kim, Seong Yoon Lim
  • Patent number: 10784490
    Abstract: 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√ón (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: Grant
    Filed: October 13, 2016
    Date of Patent: September 22, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hee Seok Jeong, Hyun Min Kim, Ju Ri Kim, Sei Woon Oh
  • Publication number: 20200274136
    Abstract: 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: Application
    Filed: July 1, 2019
    Publication date: August 27, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Min Kyung Kim, Sei Woon Oh, Sun Hwak Woo, Jin Seo Park