Patents by Inventor Martin Helliwell

Martin Helliwell 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
  • 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