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Step-time battery degradation determination

  • US 10,107,864 B2
  • Filed: 04/11/2016
  • Issued: 10/23/2018
  • Est. Priority Date: 04/11/2016
  • Status: Active Grant
First Claim
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1. A method of determining a remaining battery capacity of a battery comprising;

  • operating a battery as an energy source in an electric power distribution grid through a series of states of charge including idle, charging and discharging states;

    switching from a first state of charge from one of an idle, charging or discharging state to a different one of the idle, charging or discharging states, after a duration of time;

    responsive to the switching, calculating an amount of remaining battery capacity based upon a complete history of accrued battery degradation for the battery including battery degradation accrued during the first state of charge and a type of the first state of charge of the battery;

    repeating the operating, switching and calculating for each state in the series of states of charge until the calculated remaining battery capacity is determined to have reached an end-of-life threshold; and

    responsive to determining that the calculated remaining battery capacity has reached an end-of-life threshold, replacing the battery with a new battery.

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