Patents by Inventor Albert Shih-Young LIU

Albert Shih-Young LIU 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 state-of-charge estimation
    Patent number: 10690725
    Abstract: A battery pack management system adjusts the relative state-of-charge of respective battery blocks in a battery pack to equalize (i.e., align, balance or otherwise make similar) the peak battery block voltages (i.e., maximum or “upper peak” battery block voltages when the battery pack is being charged and/or minimum or “lower peak” battery block voltages when the battery is being discharged). Upon detecting an anomalous battery block that exhibits outlier upper and lower peak voltages, the battery pack management system adjusts the relative state of charge of respective battery blocks to center their respective upper and lower peak voltages between operating limits, thus maximizing the operating margin of the battery pack as a whole.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: June 23, 2020
    Assignee: ATIEVA, INC.
    Inventors: Steven Diamond, Gabriel Risk, Stanley Hu, Albert Shih-Young Liu, Martin Helliwell
  • Method and apparatus for determining the state-of-charge of a battery
    Patent number: 9885757
    Abstract: A method and apparatus for determining the state-of-charge of a battery. In response to detecting that the battery is in a rest state, a pre-conditioning current is drawn from the battery to affect a correlation between the state-of-charge of the battery and an open-circuit voltage of the battery. Thereafter, the open-circuit voltage of the battery is measured, and used to determine the state-of-charge.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: February 6, 2018
    Assignee: Atieva, Inc.
    Inventors: Albert Shih-Young Liu, Steven Diamond, Sam Weng
  • Determining the state of-charge of batteries via selective sampling of extrapolated open circuit voltage
    Patent number: 8872518
    Abstract: A method for estimating the state-of-charge of a battery. The method includes collecting a plurality of voltage measurements during operation of the system containing the battery and determining a time-constant of relaxation and an open-circuit voltage corresponding to the battery based, at least in part, on the voltage measurements. The method further includes estimating the state-of-charge of the battery based, at least in part, on the open-circuit voltage.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: October 28, 2014
    Assignee: ATIEVA, Inc.
    Inventors: Albert Shih-Young Liu, Li-Wei Chen
  • BATTERY STATE-OF-CHARGE ESTIMATION
    Publication number: 20130257377
    Abstract: A battery pack management system adjusts the relative state-of-charge of respective battery blocks in a battery pack to equalize (i.e., align, balance or otherwise make similar) the peak battery block voltages (i.e., maximum or “upper peak” battery block voltages when the battery pack is being charged and/or minimum or “lower peak” battery block voltages when the battery is being discharged). Upon detecting an anomalous battery block that exhibits outlier upper and lower peak voltages, the battery pack management system adjusts the relative state of charge of respective battery blocks to center their respective upper and lower peak voltages between operating limits, thus maximizing the operating margin of the battery pack as a whole.
    Type: Application
    Filed: March 29, 2012
    Publication date: October 3, 2013
    Inventors: Steven Diamond, Gabriel Risk, Stanley Hu, Albert Shih-Young Liu, Martin Helliwell
  • Method and Apparatus for Determining the State-of-Charge of a Battery
    Publication number: 20120274331
    Abstract: A method and apparatus for determining the state-of-charge of a battery. In response to detecting that the battery is in a rest state, a pre-conditioning current is drawn from the battery to affect a correlation between the state-of-charge of the battery and an open-circuit voltage of the battery. Thereafter, the open-circuit voltage of the battery is measured, and used to determine the state-of-charge.
    Type: Application
    Filed: March 28, 2012
    Publication date: November 1, 2012
    Inventors: Albert Shih-Young Liu, Steven Diamond, Sam Weng
  • DETERMINING THE STATE OF-CHARGE OF BATTERIES VIA SELECTIVE SAMPLING OF EXTRAPOLATED OPEN CIRCUIT VOLTAGE
    Publication number: 20110316547
    Abstract: A method for estimating the state-of-charge of a battery. The method includes collecting a plurality of voltage measurements during operation of the system containing the battery and determining a time-constant of relaxation and an open-circuit voltage corresponding to the battery based, at least in part, on the voltage measurements. The method further includes estimating the state-of-charge of the battery based, at least in part, on the open-circuit voltage.
    Type: Application
    Filed: June 25, 2010
    Publication date: December 29, 2011
    Inventors: Albert Shih-Young LIU, Li-Wei Chen