Patents by Inventor Sang Suk JUNG

Sang Suk JUNG 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).

  • Patent number: 11189871
    Abstract: Provided are a lithium secondary battery, which includes an electrode assembly, a battery case accommodating the electrode assembly, a surface layer comprising an engineering plastic located on the outer side of the battery case, and lead terminals connected with the electrode assembly and drawn out of the battery case, and a method of fabricating the same.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: November 30, 2021
    Inventors: Won Pill Hwang, Yong Su Choi, Sang Hun Kim, Sang Suk Jung, Cho Long Kim, Yong Kim
  • Patent number: 11171384
    Abstract: The disclosed secondary battery is capable of preventing a short-circuit pressure at which the safety vent is ruptured from being reduced due to deformation of the safety vent during assembly of the battery. The secondary battery of the present invention includes a can member accommodating an electrode assembly and a top cap assembly covering an opening of the can member. A safety vent is provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases, wherein the safety vent includes a main body and a bending unit, in which an outer edge of the main body is bent, and wherein a buffering space is defined between the bending unit and the main body.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: November 9, 2021
    Inventors: Geon Woo Min, Hang Soo Shin, Do Gyun Kim, Sang Suk Jung, Chan Bae Kim
  • Publication number: 20210336309
    Abstract: The present invention relates to a secondary battery capable of improving venting pressure distribution. A secondary battery including an electrode assembly, a can member that accommodates the electrode assembly, and a top cap assembly that covers an opening of the can member. The top cap assembly includes a top cap positioned at the uppermost portion and a safety vent part positioned below the top cap. The safety vent part includes a rupture portion that is ruptured when an internal pressure within the can member equals or exceeds a predetermined pressure, a rupture notch portion that defines a boundary of the rupture portion, and a bending notch portion which is spaced apart from the rupture notch portion toward a center of the rupture portion on a bottom surface of the rupture portion, and the bending notch portion is bent when the internal pressure within the can member increases.
    Type: Application
    Filed: November 13, 2019
    Publication date: October 28, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Geon Woo Min, Je Jun Lee, Sang Suk Jung
  • Publication number: 20210328290
    Abstract: A secondary battery according to the present invention comprises an electrode assembly in which an electrode and a separator are combined and staked, a can configured to accommodate the electrode assembly therein, and an insulation coating part applied to an inner surface of the can, wherein the insulation coating part has a coating thickness of 1 ?m to 15 ?m.
    Type: Application
    Filed: August 14, 2019
    Publication date: October 21, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Gu Lee, Do Gyun Kim, Kwang Su Hwangbo, Sang Suk Jung
  • Patent number: 11056749
    Abstract: To solve the above-described objects, a method for manufacturing a secondary battery according to an embodiment of the present invention comprises: manufacturing an electrode assembly in which electrodes and a separator are alternately stacked; inserting the electrode assembly into a battery case through an opening; covering the opening of the battery case; injecting an electrolyte into the battery case through an injection hole formed in the battery case; closing the injection hole; performing a pre-formation process; and applying external force to a switch of a gas discharge device formed on one surface of the battery case, thereby linearly moving a gasket of the gas discharge device and opening a gas discharge hole, such that a first gas generated in the battery case is discharged to an outside of the battery case during the performing of the pre-formation process.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: July 6, 2021
    Inventors: Jin Uk Do, Je Jun Lee, Sang Suk Jung, Min Ki Jo
  • Publication number: 20210151838
    Abstract: A rust inhibitor for a gasket, a gasket for a secondary battery including the same, and a secondary battery are provided. The rust inhibitor includes an anti-rust material and a polymer resin, wherein the polymer resin includes at least one of polyethylene or a copolymer which includes 2 or more derived units selected from the group consisting of an ethylene-derived unit, a propylene-derived unit, a butylene terephthalate-derived unit, an ethylene terephthalate-derived unit, and a methyl acrylate-derived unit.
    Type: Application
    Filed: February 25, 2019
    Publication date: May 20, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Gu Lee, Do Gyun Kim, Sang Suk Jung, Hang Soo Shin, Chan Bae Kim
  • Publication number: 20210091434
    Abstract: A gasket for a secondary battery including a base resin and a rust inhibitor, wherein the base resin includes polybutylene terephthalate and the rust inhibitor includes an anti-rust material and a polymer resin, and the base resin and the polymer resin are different.
    Type: Application
    Filed: February 25, 2019
    Publication date: March 25, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Byoung Gu Lee, Do Gyun Kim, Sang Suk Jung, Hang Soo Shin, Chan Bae Kim
  • Publication number: 20210083333
    Abstract: The present invention relates to a washer for a secondary battery including a film layer and an adhesive layer disposed on at least one surface of the film layer, wherein the adhesive layer includes an adhesive component and an indicator component, and the indicator component is fat-soluble, a secondary battery including the same, and a method for manufacturing the washer.
    Type: Application
    Filed: December 21, 2018
    Publication date: March 18, 2021
    Applicant: LG CHEM, LTD.
    Inventors: Byoung Gu LEE, Do Gyun KIM, Je Jun LEE, Sang Suk JUNG, Hang Soo SHIN
  • Publication number: 20210083236
    Abstract: A cylindrical secondary battery may have an insulation layer formed in a region in which the top cap and the first gasket are coupled to each other. The insulation layer may include a ceramic material and a binder. The secondary battery is designed so that, when an external electrical conductive object is electrically connected directly to a positive electrode and a negative electrode of the secondary battery, an electrode tab of the secondary battery is broken as quickly as possible.
    Type: Application
    Filed: March 7, 2019
    Publication date: March 18, 2021
    Applicant: LG Chem, Ltd.
    Inventors: Do Gyun Kim, Sang Suk Jung, Byoung Kook Lee, Byoung Gu Lee, Chan Bae Kim
  • Patent number: 10804507
    Abstract: The present disclosure relates to a pouch case for a secondary battery, and a secondary battery comprising the same, and in particular, to a pouch case for a secondary battery fabricated by laminating an inner resin layer, a middle resin layer and an outer resin layer, wherein the inner resin layer comprises a polyolefin-based resin and a thermosetting moisture absorber, and a secondary battery comprising the same.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: October 13, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Hyung Kyun Yu, Sang Hun Kim, Won Pill Hwang, Soo Ji Hwang, Sang Suk Jung
  • Patent number: 10790486
    Abstract: Provided are a secondary battery that is capable of preventing a can member from corroding and a method for manufacturing the same. The secondary battery includes a can member defining an outer appearance of the secondary battery, a top cap assembly an opening of the can member, a gasket insulating the can member and the top cap assembly from each other, and a fracture part disposed on an inner circumference of the opening. The fracture part is blocked from the outside by the gasket.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: September 29, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Do Gyun Kim, Je Jun Lee, Kwang Su Hwangbo, Sang Suk Jung, Hang Soo Shin, Gil Young Lee
  • Publication number: 20200295318
    Abstract: The present invention relates to a secondary battery, in which a sealing property is improved, and a method for manufacturing the same. The secondary battery includes: a can member having an opening; a top cap assembly sealing the opening; a gasket insulating the opening from the top cap assembly; and a hot melt applied to a surface of the gasket, wherein the hot melt has fluidity and viscosity at a predetermined temperature or more and is hardened at a temperature less than the predetermined temperature.
    Type: Application
    Filed: March 23, 2018
    Publication date: September 17, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Do Gyun Kim, Sang Suk Jung, Byoung Kook Lee, Hang Soo Shin, Geon Woo Min, Byoung Gu Lee, Chan Bae Kim
  • Patent number: 10777840
    Abstract: The present invention relates to an apparatus for sealing a secondary battery. The apparatus comprises: a sealing member thermally fusing and sealing a sealing surface of a pouch in which an electrode assembly is accommodated; and a cooling member cooling the sealing surface.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: September 15, 2020
    Assignee: LG Chem, Ltd.
    Inventors: Sang Hun Kim, Yong Su Choi, Sang Suk Jung, Won Pill Hwang, Cho Long Kim, Yong Kim
  • Publication number: 20200287186
    Abstract: The present invention relates to a battery cell. The battery cell comprises: an electrode assembly provided with an electrode tab; a case which accommodates the electrode assembly and of which at least a portion of an edge is sealed to provide a sealing surface; an electrode lead coupled to the electrode tab and led out of the case; a lead film disposed on each of top and bottom surfaces of the lead electrode disposed on the sealing surface of the case and coupled together with the sealing surface; and a main gas discharge tube disposed in the case and having one end buried in the lead film.
    Type: Application
    Filed: May 26, 2020
    Publication date: September 10, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Cho Long KIM, Yong Su CHOI, Sang Hun KIM, Sang Suk JUNG, Won Pill HWANG, Yong KIM
  • Patent number: 10700324
    Abstract: The present invention relates to a battery cell. The battery cell comprises: an electrode assembly provided with an electrode tab; a case which accommodates the electrode assembly and of which at least a portion of an edge is sealed to provide a sealing surface; an electrode lead coupled to the electrode tab and led out of the case; a lead film disposed on each of top and bottom surfaces of the lead electrode disposed on the sealing surface of the case and coupled together with the sealing surface; and a main gas discharge tube disposed in the case and having one end buried in the lead film.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: June 30, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Cho Long Kim, Yong Su Choi, Sang Hun Kim, Sang Suk Jung, Won Pill Hwang, Yong Kim
  • Publication number: 20200185666
    Abstract: To solve the above problem, a top insulator for a case of a secondary battery, according to an embodiment of the present invention includes: a glass fiber including crossed weft yarns and warp yarns of raw yarns of the glass fiber; and silicone rubber on at least one surface of the glass fiber.
    Type: Application
    Filed: January 3, 2019
    Publication date: June 11, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Byoung Gu LEE, Do Gyun KIM, Sang Suk JUNG, Hang Soo SHIN
  • Publication number: 20200144563
    Abstract: To solve the above problem, a method for manufacturing a top insulator configured to be inserted into a case of a secondary battery, according to an embodiment of the present invention includes: preparing a top insulator fabric by applying a silicone rubber to at least one surface of a glass fiber fabric formed by crossing weft yarns and warp yarns of glass fiber raw yams; and punching the top insulator fabric.
    Type: Application
    Filed: January 3, 2019
    Publication date: May 7, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Byoung Gu LEE, Do Gyun KIM, Sang Suk JUNG, Hang Soo SHIN
  • Patent number: 10615381
    Abstract: 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: Grant
    Filed: June 27, 2016
    Date of Patent: April 7, 2020
    Assignee: 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
  • Publication number: 20200106060
    Abstract: A secondary battery may include: an electrode assembly in which a positive electrode, a negative electrode, and a separator are wound or stacked; an insulator on at least one of an upper portion and a lower portion of the electrode assembly; and a battery case configured to accommodate the electrode assembly, the insulator, and an electrolyte and sealed by a cap assembly, wherein the insulator includes: a peripheral portion having a disk ring shape and made of a rigid material; and a central portion extending inward from an inner circumferential surface of the peripheral portion and including a textile fabric having high-temperature resistance.
    Type: Application
    Filed: October 17, 2018
    Publication date: April 2, 2020
    Applicant: LG CHEM, LTD.
    Inventors: Hang Soo SHIN, Do Gyun KIM, Sang Suk JUNG, Byoung Gu LEE, Chan Bae KIM
  • Publication number: 20200091482
    Abstract: The disclosed secondary battery is capable of preventing a short-circuit pressure at which the safety vent is ruptured from being reduced due to deformation of the safety vent during assembly of the battery. The secondary battery of the present invention includes a can member accommodating an electrode assembly and a top cap assembly covering an opening of the can member. A safety vent is provided in the top cap assembly to discharge a gas when an inner pressure of the can member increases, wherein the safety vent includes a main body and a bending unit, in which an outer edge of the main body is bent, and wherein a buffering space is defined between the bending unit and the main body.
    Type: Application
    Filed: November 7, 2018
    Publication date: March 19, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Geon Woo Min, Hang Soo Shin, Do Gyun Kim, Sang Suk Jung, Chan Bae Kim