Patents by Inventor Joo Hak Lee

Joo Hak Lee 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: 6780207
    Abstract: A method for manufacturing a lithium polymer secondary battery including cells each having an anode, a cathode, and an isolation film, which is capable of minimizing the gap between each electrode and the isolation film, and uniformly distributing stress over the entire surface of each electrode. This method involves preparing anode plates having a desired size, cathode plates having a desired size, and an isolation film having a desired size; wrapping one of the anode plates by the isolation film, wrapping one of the cathode plates by the isolation film; wherein it is overlapped with the anode plate, thereby forming one of the cells, and stacking remaining plates at both sides of the formed cell while rotating the formed cell, and simultaneously wrapping by the isolation film so that they are alternately arranged in a state in which the isolation film is tensioned by a desired tension.
    Type: Grant
    Filed: January 13, 2003
    Date of Patent: August 24, 2004
    Assignee: Saehan Enertech Incorporation
    Inventors: Seung Woo Han, Young Jae Kim, Joo Hak Lee, Jong Cheon Kim, Suk Ho Jin, Kab Youl Lee