Patents by Inventor Chang-Sin Yeo

Chang-Sin Yeo 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: 9444089
    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 and is divided into a first mandrel part located at one side of a central region of the mandrel, in which an end of the sheet type stack is fixedly fitted, and a second mandrel part located at the other side of the central region of the mandrel, and the first mandrel part and the second mandrel part each include a main body part having a region in which the sheet type stack is fitted in an engaged state and an exchange part, detachably mounted to the main body part, having an end of a major axis of the mandrel.
    Type: Grant
    Filed: August 6, 2013
    Date of Patent: September 13, 2016
    Assignee: LG CHEM, LTD.
    Inventors: Jae Cheol Jeong, Hak Kyun Kim, Dong-Myung Kim, Sunhwan Kim, Chang Sin Yeo
  • Patent number: 9160030
    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: Grant
    Filed: August 1, 2013
    Date of Patent: October 13, 2015
    Assignee: LG CHEM, LTD.
    Inventors: Jae Cheol Jeong, Hak Kyun Kim, Dong-Myung Kim, Sunhwan Kim, Chang Sin Yeo
  • Publication number: 20130323556
    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 and is divided into a first mandrel part located at one side of a central region of the mandrel, in which an end of the sheet type stack is fixedly fitted, and a second mandrel part located at the other side of the central region of the mandrel, and the first mandrel part and the second mandrel part each include a main body part having a region in which the sheet type stack is fitted in an engaged state and an exchange part, detachably mounted to the main body part, having an end of a major axis of the mandrel.
    Type: Application
    Filed: August 6, 2013
    Publication date: December 5, 2013
    Applicant: LG CHEM, LTD.
    Inventors: Jae Cheol JEONG, Hak Kyun KIM, Dong-Myung KIM, Sunhwan KIM, Chang Sin YEO
  • 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
  • Patent number: 7479347
    Abstract: Disclosed herein is a prismatic battery having an electrode assembly mounted in a prismatic battery case, wherein an electrolyte injection hole formed in a base plate mounted to an open upper end of the battery case is constructed such that an inside upper end of the electrolyte injection hole is formed in a downward taper (incline) structure, and a metal ball is forcibly inserted into the electrolyte injection hole such that the metal ball is plastically deformed to seal the electrolyte injection hole. The prismatic battery according to the present invention provides high coupling force between the metal ball and the electrolyte injection hole due to the plastic deformation and forced insertion of the metal ball and high sealability of the electrolyte injection hole. Also, the formation of a groove at the upper end of the forcibly inserted metal ball and the generation of cracks at the interface between the metal ball and the inside surface of the electrolyte injection hole are effectively prevented.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: January 20, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Chang-Sin Yeo, Sung Ryul Kwon, Hyunjin Kim, Seung Tae Lee, Jin-Woo Jeon
  • Publication number: 20070264565
    Abstract: Disclosed herein is a prismatic battery having an electrode assembly mounted in a prismatic battery case, wherein an electrolyte injection hole formed in a base plate mounted to an open upper end of the battery case is constructed such that an inside upper end of the electrolyte injection hole is formed in a downward taper (incline) structure, and a metal ball is forcibly inserted into the electrolyte injection hole such that the metal ball is plastically deformed to seal the electrolyte injection hole. The prismatic battery according to the present invention provides high coupling force between the metal ball and the electrolyte injection hole due to the plastic deformation and forced insertion of the metal ball and high sealability of the electrolyte injection hole. Also, the formation of a groove at the upper end of the forcibly inserted metal ball and the generation of cracks at the interface between the metal ball and the inside surface of the electrolyte injection hole are effectively prevented.
    Type: Application
    Filed: November 13, 2006
    Publication date: November 15, 2007
    Applicant: LG CHEM, LTD.
    Inventors: Chang-Sin YEO, Sung Ryul KWON, Hyunjin KIM, Seung Tae LEE, Jin-Woo JEON