Patents by Inventor Hak Kyun KIM

Hak Kyun 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).

  • MANDREL FOR PREPARATION OF JELLY-ROLL TYPE ELECTRODE ASSEMBLY
    Publication number: 20130316206
    Abstract: Disclosed herein is a mandrel configured to be used in a winding process for manufacturing a jelly roll type electrode assembly using a long sheet type stack of a cathode/separator/anode structure, wherein the mandrel is oval in a section perpendicular to a rotational central axis of the mandrel, a length ratio of a major axis to a minor axis of the mandrel being 1.5 or more, and a tilt of an outer side of the mandrel is continuously changed from an end of the minor axis of the mandrel to an end of the major axis of the mandrel in the section perpendicular to the rotational central axis of the mandrel.
    Type: Application
    Filed: August 1, 2013
    Publication date: November 28, 2013
    Applicant: LG CHEM, LTD.
    Inventors: Jae Cheol JEONG, Hak Kyun KIM, Dong-Myung KIM, Sunhwan KIM, Chang Sin YEO