Patents by Inventor Sangdae Hwang

Sangdae Hwang 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).

  • Secondary battery
    Patent number: 7687199
    Abstract: A secondary battery which can prevent leakage of an electrolytic solution by improving the sealing property of an electrolytic solution injection hole formed at a cap plate comprises: an electrode assembly including a cathode plate, a separator and an anode plate; a can having an upper opening for receiving the electrode assembly; and a cap assembly which is combined with the upper opening of the can, and which includes a cap plate provided with an electrolytic solution injection hole at one side thereof. A groove is formed in an axial direction on an inner circumferential surface of the electrolytic solution injection hole. Thus, the contact area between a stopper and the electrolytic solution injection hole is increased, thereby improving the sealing property of the electrolytic solution injection hole.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: March 30, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Jinwook Kim, Jaeil Seong, Hideaki Yoshio, Sangdae Hwang, Jiwan Jeong
  • Secondary battery
    Publication number: 20090075169
    Abstract: A secondary battery which can prevent leakage of an electrolytic solution by improving the sealing property of an electrolytic solution injection hole formed at a cap plate comprises: an electrode assembly including a cathode plate, a separator and an anode plate; a can having an upper opening for receiving the electrode assembly; and a cap assembly which is combined with the upper opening of the can, and which includes a cap plate provided with an electrolytic solution injection hole at one side thereof. A groove is formed in an axial direction on an inner circumferential surface of the electrolytic solution injection hole. Thus, the contact area between a stopper and the electrolytic solution injection hole is increased, thereby improving the sealing property of the electrolytic solution injection hole.
    Type: Application
    Filed: February 4, 2008
    Publication date: March 19, 2009
    Inventors: Jinwook Kim, Jaeil Seong, Hideaki Yoshio, Sangdae Hwang, Jiwan Jeong