Patents by Inventor Xiaoquan Bie

Xiaoquan Bie 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).

  • Battery monitor with correction for internal OHMIC measurements of battery cells in parallel connected battery strings
    Patent number: 8933702
    Abstract: A battery monitor determines an internal resistance of a battery cell of a battery having parallel connected battery strings which accounts for errors introduced by the parallel connected battery strings. When determining the internal resistance of a battery cell, the battery monitor determines a baseline intercell resistance of an intercell connecting the negative terminal of the battery cell to the positive terminal of an adjacent battery. The battery monitor then applies a momentary load across the battery cell and immediately prior to releasing the load, measures the voltage across the battery cell (loaded voltage) and the voltage across the intercell. The battery monitor then calculates the current flowing through the intercell (intercell current) by dividing the measured voltage across the intercell by the determined intercell resistance.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: January 13, 2015
    Assignee: Liebert Corporation
    Inventors: Edward W. Deveau, Xiaoquan Bie
  • BATTERY MONITOR WITH CORRECTION FOR INTERNAL OHMIC MEASUREMENTS OF BATTERY CELLS IN PARALLEL CONNECTED BATTERY STRINGS
    Publication number: 20120119745
    Abstract: A battery monitor determines an internal resistance of a battery cell of a battery having parallel connected battery strings which accounts for errors introduced by the parallel connected battery strings. When determining the internal resistance of a battery cell, the battery monitor determines a baseline intercell resistance of an intercell connecting the negative terminal of the battery cell to the positive terminal of an adjacent battery. The battery monitor then applies a momentary load across the battery cell and immediately prior to releasing the load, measures the voltage across the battery cell (loaded voltage) and the voltage across the intercell. The battery monitor then calculates the current flowing through the intercell (intercell current) by dividing the measured voltage across the intercell by the determined intercell resistance.
    Type: Application
    Filed: May 12, 2011
    Publication date: May 17, 2012
    Applicant: LIEBERT CORPORATION
    Inventors: Edward W. Deveau, Xiaoquan Bie