Patents by Inventor Shunhui Lei

Shunhui Lei 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).

  • Lithium battery protection circuitry
    Patent number: 9166399
    Abstract: A lithium battery protection circuit coupled to a lithium battery is provided. The lithium battery protection circuit includes an over-charge protection circuit and a logic circuit coupled to over-charge protection circuit. The logic circuit has a first logic output and a second logic output. The lithium battery protection circuit also includes a level shift circuit coupled to the logic circuit through the first logic output and the second logic output, and the level shift circuit is configured to convert the first logic output and the second logic output to high voltage levels in an over-charge protection state. Further, the lithium battery protection circuit includes a substrate switching circuit coupled to the level shift circuit and a power transistor coupled between a negative end of the lithium battery and an external circuit negative electrode.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: October 20, 2015
    Assignees: CSMC TECHNOLOGIES FAB1 CO., LTD., CSMC TECHNOLOGIES FAB2 CO., LTD.
    Inventor: Shunhui Lei
  • LITHIUM BATTERY PROTECTION CIRCUITRY
    Publication number: 20130099755
    Abstract: A lithium battery protection circuit coupled to a lithium battery is provided. The lithium battery protection circuit includes an over-charge protection circuit and a logic circuit coupled to over-charge protection circuit. The logic circuit has a first logic output and a second logic output. The lithium battery protection circuit also includes a level shift circuit coupled to the logic circuit through the first logic output and the second logic output, and the level shift circuit is configured to convert the first logic output and the second logic output to high voltage levels in an over-charge protection state. Further, the lithium battery protection circuit includes a substrate switching circuit coupled to the level shift circuit and a power transistor coupled between a negative end of the lithium battery and an external circuit negative electrode.
    Type: Application
    Filed: November 29, 2011
    Publication date: April 25, 2013
    Applicants: CSMC TECHNOLOGIES FAB2 CO., LTD., CSMC TECHNOLOGIES FAB1 CO., LTD.
    Inventor: Shunhui Lei