Patents by Inventor Sang Jih Kim

Sang Jih 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).

  • Publication number: 20240186644
    Abstract: An activation method for a lithium secondary battery includes: a primary charging process charging a lithium secondary battery; a first degassing process discharging an internal gas containing oxygen to an outside of the lithium secondary battery or moving the internal gas containing oxygen to a gas pocket part after the primary charging process; an aging process aging the lithium secondary battery after the first degassing process; and a second degassing process removing gas from the aged lithium secondary battery.
    Type: Application
    Filed: November 22, 2022
    Publication date: June 6, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Sung Hoon YU, Eui Kyung LEE, Sang Jih KIM, Suk Hyun HONG, Ju Hyeon CHO
  • Patent number: 11973242
    Abstract: A degassing apparatus for a secondary battery, and a degassing method using same, is provided. The degassing apparatus includes a drive motor and a jig arm configured to pressurize a first surface of a gas pocket of a battery cell and a second surface opposite the first surface by controlling a separation distance by the operation of a driving motor. The degassing apparatus is capable of performing an effective degassing and sealing process for the battery cell without positional movement of the battery cell during cell activation or after cell activation.
    Type: Grant
    Filed: July 22, 2020
    Date of Patent: April 30, 2024
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Sang Jih Kim, Joon Sung Bae, Beom Koon Lee, Dong Hun Bae, Eui Kyung Lee, Suk Hyun Hong
  • Patent number: 11949062
    Abstract: A pressing jig for removing gas generated in an activation process of a battery cell includes a plate-shaped lower plate on which the battery cell that has undergone the activation process is placed and fixed, and an upper plate that presses the battery cell placed on the lower plate from above. At least one of the upper plate or the lower plate has a structure in which n (n?3) separated sub-plates are assembled to form a single plate, and the sub-plates independently press the battery cell. The pressing jig can suppress trapping of internal gas by sequentially pressing the battery cell.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: April 2, 2024
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Suk Hyun Hong, Joon Sung Bae, Eui Kyung Lee, Sang Jih Kim, Beom Koon Lee, Dong Hun Bae
  • Publication number: 20240072289
    Abstract: A secondary battery activation device capable of effectively removing gas generated inside a secondary battery cell during an activation process of a secondary battery and a secondary battery manufacturing method using the same are provided. The secondary battery activation device includes a first pressing unit comprising a first pressing plate and a plurality of first elastic pressing members located on a first surface of the first pressing plate, and a second pressing unit comprising a second pressing plate and a plurality of second elastic pressing members located on a second surface of the second pressing plate, the second surface of the second pressing plate being arranged to face the first surface of the first pressing plate.
    Type: Application
    Filed: November 23, 2022
    Publication date: February 29, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Eui Kyung LEE, Nak Gi SUNG, Sang Jih KIM, Suk Hyun HONG
  • Publication number: 20240063439
    Abstract: An activation method for a lithium secondary battery having an electrode lead includes: a pre-aging process aging the lithium secondary battery at room temperature; a formation process charging the lithium secondary battery; and a roll-pressing process of pressurizing the lithium secondary battery using a pressure roller. The roll-pressing process includes pressing from a center of the lithium secondary battery toward an end of the lithium secondary battery where the electrode lead is located.
    Type: Application
    Filed: November 2, 2022
    Publication date: February 22, 2024
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Sang Jih KIM, Nak Gi SUNG, Eui Kyung LEE, Suk Hyun HONG
  • Patent number: 11728506
    Abstract: A device for charging and discharging a battery cell capable of suppressing a swelling phenomenon of a terrace portion of a battery cell during a formation process of the battery cell includes first and second plates configured to receive a battery cell therebetween and to press two surfaces of the battery cell; first and second grippers connected to the first and second plates, respectively, the first and second grippers protrude to face each other and configured to contact a lead region of the battery cell; and first and second pressing pads positioned inward of the first and second grippers, the first and second pressing pads being configured to contact a terrace region of the battery cell. A method of charging and discharging a battery cell using the same is also provided.
    Type: Grant
    Filed: November 22, 2021
    Date of Patent: August 15, 2023
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Suk Hyun Hong, Joon Sung Bae, Eui Kyung Lee, Sang Jih Kim, Beom Koon Lee, Dong Hun Bae
  • Publication number: 20230187684
    Abstract: The present invention relates to a method for manufacturing a secondary battery and an apparatus for manufacturing a secondary battery. The method for manufacturing the secondary battery according to the present invention comprises: an accommodation process of accommodating an electrode assembly, in which electrodes and separators are alternately stacked, an electrolyte, and one side portion of electrode leads connected to the electrodes, in a pouch to form a cell; an activation process of charging the cell to activate the cell; a pressing process of sequentially pressing the cell through pressing rolls after the activation process to press the cell; and a degassing process of discharging an internal gas of the cell to the outside after the pressing process.
    Type: Application
    Filed: July 5, 2021
    Publication date: June 15, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Suk Hyun Hong, Eui Kyung Lee, Joon Sung Bae, Sang Jih Kim, Beom Koon Lee, Dong Hun Bae
  • Publication number: 20230135483
    Abstract: A device for charging and discharging a battery cell includes first and second plates spaced from each other, the first and second plates being configured to press respective first and second surfaces of a battery cell locatable therebetween, and first and second pressing blocks located on the first and second plates, respectively, the first and second pressing blocks protruding from the first and second plates to face each other. The first and second pressing blocks are locatable in a space between a body and a gas pocket of the battery cell. A method using the device is also provided.
    Type: Application
    Filed: November 22, 2021
    Publication date: May 4, 2023
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Suk Hyun HONG, Joon Sung BAE, Eui Kyung LEE, Sang Jih KIM, Beom Koon LEE, Dong Hun BAE
  • Publication number: 20230045436
    Abstract: The present invention provides a gas removing device, which removes a gas generated inside a pouch, in which an electrode assembly is accommodated. The gas removing device includes a pair of vacuum tubes configured to press opposing surfaces of a pouch so as to form a vacuum surface on the pouch; a heating member provided on a pressing surface of each of the vacuum tubes, which presses the pouch, is configured to seal only a portion of an edge of the vacuum surface so as to form a sealed part and an unsealed part; a cutting member configured to cut the vacuum surface of the pouch and form a cutoff hole; and a gas discharging member configured to discharge a gas from inside the pouch to the outside through the unsealed part, the cutoff hole, and the vacuum tubes.
    Type: Application
    Filed: September 16, 2021
    Publication date: February 9, 2023
    Applicant: LG Energy Solution, Ltd.
    Inventors: Sang Jih Kim, Joon Sung Bae, Eui Kyung Lee, Suk Hyun Hong, Beom Koon Lee, Dong Hun Bae
  • Publication number: 20230029709
    Abstract: A device for charging and discharging a battery cell capable of suppressing a swelling phenomenon of a terrace portion of a battery cell during a formation process of the battery cell includes first and second plates configured to receive a battery cell therebetween and to press two surfaces of the battery cell; first and second grippers connected to the first and second plates, respectively, the first and second grippers protrude to face each other and configured to contact a lead region of the battery cell; and first and second pressing pads positioned inward of the first and second grippers, the first and second pressing pads being configured to contact a terrace region of the battery cell. A method of charging and discharging a battery cell using the same is also provided.
    Type: Application
    Filed: November 22, 2021
    Publication date: February 2, 2023
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Suk Hyun HONG, Joon Sung BAE, Eui Kyung LEE, Sang Jih KIM, Beom Koon LEE, Dong Hun BAE
  • Publication number: 20220278352
    Abstract: A pressing jig for removing gas generated in an activation process of a battery cell includes a plate-shaped lower plate on which the battery cell that has undergone the activation process is placed and fixed, and an upper plate that presses the battery cell placed on the lower plate from above. At least one of the upper plate or the lower plate has a structure in which n (n?3) separated sub-plates are assembled to form a single plate, and the sub-plates independently press the battery cell. The pressing jig can suppress trapping of internal gas by sequentially pressing the battery cell.
    Type: Application
    Filed: January 8, 2021
    Publication date: September 1, 2022
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Suk Hyun HONG, Joon Sung BAE, Eui Kyung LEE, Sang Jih KIM, Beom Koon LEE, Dong Hun BAE
  • Publication number: 20220115688
    Abstract: A formation jig includes a pressing plate configured to press a battery cell, the pressing plate having a first through hole; a pressing support plate configured to support the battery cell when the pressing plate presses an upper or lower portion of the battery cell, the pressing support plate having a second through hole and a third through hole; a first screw configured to pass through first through hole of the pressing plate and the second through hole of the pressing support plate and to move the pressing plate in a gap-adjusting direction by rotation thereof; and a second screw configured to pass through the third through hole of the pressing support plate and to move the pressing support plate in the gap-adjusting direction by rotation thereof. A diameter of the second through hole is larger than a diameter of the first through hole.
    Type: Application
    Filed: October 22, 2020
    Publication date: April 14, 2022
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Dong Hun BAE, Joon Sung BAE, Eui Kyung LEE, Sang Jih KIM, Suk Hyun HONG, Beom Koon LEE
  • Publication number: 20220077537
    Abstract: A degassing apparatus for a secondary battery, and a degassing method using same, is provided. The degassing apparatus includes a drive motor and a jig arm configured to pressurize a first surface of a gas pocket of a battery cell and a second surface opposite the first surface by controlling a separation distance by the operation of a driving motor. The degassing apparatus is capable of performing an effective degassing and sealing process for the battery cell without positional movement of the battery cell during cell activation or after cell activation.
    Type: Application
    Filed: July 22, 2020
    Publication date: March 10, 2022
    Applicant: LG ENERGY SOLUTION, LTD.
    Inventors: Sang Jih KIM, Joon Sung BAE, Beom Koon LEE, Dong Hun BAE, Eui Kyung LEE, Suk Hyun HONG
  • Patent number: 11245160
    Abstract: A secondary battery and a method for manufacturing the same are provided. An electrode assembly accommodated in the secondary battery having various shapes is manufactured. In particular, a method for manufacturing a secondary battery includes an electrode stack preparation step of preparing an electrode stack which includes a first unit cell having a first area and a second unit cell having a second area that is less than the first area, and which has a structure in which the second unit cell is disposed on one surface of the first unit cell. The method further includes a curved surface formation step of pressing at least a part of an independent portion, which does not overlap the second unit cell, of the first unit cell to form a curved surface on the at least the part of the independent portion.
    Type: Grant
    Filed: November 5, 2018
    Date of Patent: February 8, 2022
    Assignee: LG ENERGY SOLUTION, LTD.
    Inventors: Sang Jih Kim, Sang Baek Ryu
  • Publication number: 20200287193
    Abstract: A secondary battery and a method for manufacturing the same are provided. An electrode assembly accommodated in the secondary battery having various shapes is manufactured. In particular, a method for manufacturing a secondary battery includes an electrode stack preparation step of preparing an electrode stack which includes a first unit cell having a first area and a second unit cell having a second area that is less than the first area, and which has a structure in which the second unit cell is disposed on one surface of the first unit cell. The method further includes a curved surface formation step of pressing at least a part of an independent portion, which does not overlap the second unit cell, of the first unit cell to form a curved surface on the at least the part of the independent portion.
    Type: Application
    Filed: November 5, 2018
    Publication date: September 10, 2020
    Inventors: Sang Jih Kim, Sang Baek Ryu