Patents by Inventor Kalyi Sheng

Kalyi Sheng 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).

  • Systems and methods for cell balancing
    Patent number: 8461806
    Abstract: A cell balancing circuit comprises a first cell having a first voltage, a second cell in series with the first cell and having a second voltage that is greater than the first voltage, and a bypass path in parallel with the second cell for enabling a bypass current for the second cell if a difference between the first voltage and the second voltage is greater than a predetermined threshold. The bypass current is enabled for a balancing time period that is proportional to the difference between the first voltage and the second voltage.
    Type: Grant
    Filed: October 15, 2007
    Date of Patent: June 11, 2013
    Assignee: O2Micro Inc
    Inventors: Flavius Lupu, Constantin Bucur, Xiaojun Zeng, Kalyi Sheng, Anquan Xiao
  • Systems and methods for cell balancing
    Publication number: 20090096420
    Abstract: A cell balancing circuit comprises a first cell having a first voltage, a second cell in series with the first cell and having a second voltage that is greater than the first voltage, and a bypass path in parallel with the second cell for enabling a bypass current for the second cell if a difference between the first voltage and the second voltage is greater than a predetermined threshold. The bypass current is enabled for a balancing time period that is proportional to the difference between the fist voltage and the second voltage.
    Type: Application
    Filed: October 15, 2007
    Publication date: April 16, 2009
    Inventors: Flavius Lupu, Constantin Bucur, Xiaojun Zeng, Kalyi Sheng, Anquan Xiao