Patents by Inventor Jun Tak Kim

Jun Tak 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: 20200335736
    Abstract: A method of manufacturing a cylindrical battery case includes performing an ironing process, which is one of the processes of manufacturing the battery case, a plurality of times in order to decrease the surface roughness of the battery case, thereby improving the corrosion characteristics of the battery case. The surface roughness of the cylindrical battery case is decreased by performing a thickness reducing process when a process for forming the outer circumferential surface of a body of the cylindrical battery case is performed at the time of manufacturing the cylindrical battery case. In addition, corrosion characteristics are improved for respective values of the surface roughness.
    Type: Application
    Filed: October 23, 2018
    Publication date: October 22, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Kwang Su Hwang Bo, Je Jun Lee, Sang Sok Jung, Jun Tak Kim, Gil Young Lee, Seong Mo Koo
  • 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: 20200035962
    Abstract: Disclosed is a cylindrical battery cell configured such that the outer surface of a cylindrical case excluding electrode terminals is wrapped by a heat-shrinkable tube, wherein the heat-shrinkable tube includes a tube substrate made of a polyester-based resin, the tube substrate being heat-shrinkable; a reinforcement agent, made of a nylon-based resin, for increasing the tensile stress and operating temperature of the heat-shrinkable tube; and an ultraviolet (UV) absorber for absorbing ultraviolet rays radiated to the heat-shrinkable tube and emitting the absorbed ultraviolet rays as thermal energy to prevent the scission of polymer chains of the nylon-based resin or the polyester-based resin as the result of reaction with oxygen.
    Type: Application
    Filed: December 26, 2017
    Publication date: January 30, 2020
    Applicant: LG Chem, Ltd.
    Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
  • Publication number: 20190280252
    Abstract: Disclosed is a cylindrical battery cell in which a heat-shrinkable tube wraps an outer surface of a cylindrical case of the cylindrical battery cell except electrode terminals, the heat-shrinkable tube including: a base material, which is a polyester resin, capable of shrinking by heat; a supplement, which is a nylon resin, capable of increasing a tensile strength and operating temperature of the heat-shrinkable tube; and an ultraviolet stabilizer capable of inhibiting a chain reaction of free radicals generated by cleavage of polymer chains of the nylon resin or the polyester resin, when the heat-shrinkable tube is exposed to an ultraviolet ray irradiation.
    Type: Application
    Filed: December 26, 2017
    Publication date: September 12, 2019
    Applicant: LG Chem, Ltd.
    Inventors: Jun-Tak Kim, Je-Jun Lee, Kwang-Su Hwang Bo, Sang-Sok Jung, Gil-Young Lee
  • Publication number: 20180233713
    Abstract: A cylindrical battery cell is provided. The cylindrical battery cell configured to have a structure in which a wound type electrode assembly having a positive electrode/separator/negative electrode structure is mounted in a cylindrical can. The cylindrical battery cell includes an inorganic coating portion for accelerating dissipation of heat from the cylindrical can, the inorganic coating portion being provided on at least a part of the outer surface of the cylindrical can.
    Type: Application
    Filed: February 13, 2018
    Publication date: August 16, 2018
    Applicant: LG CHEM, LTD.
    Inventors: Byoung Gu LEE, Do Gyun KIM, Jun Tak KIM, Hang Soo SHIN, Byoung Kook LEE, Sang Sok JUNG
  • Publication number: 20180062122
    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: Application
    Filed: June 27, 2016
    Publication date: March 1, 2018
    Applicant: 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