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Systems and methods for state of charge estimation

  • US 9,651,624 B2
  • Filed: 03/13/2013
  • Issued: 05/16/2017
  • Est. Priority Date: 12/17/2012
  • Status: Expired due to Fees
First Claim
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1. A method comprising:

  • receiving a voltage from a battery;

    converting the voltage to a first state of charge; and

    converting the voltage to an estimated state of charge using a first algorithm when the first state of charge of the battery is in a first range and converting the voltage to said estimated state of charge using a second algorithm when the first state of charge of the battery is in a second range,wherein converting the voltage to said estimated state of charge using the second algorithm comprises;

    accessing a stored state of charge associated with the voltage;

    determining if the battery is in a charging state or a discharging state; and

    applying an offset state of charge to the stored state of charge when the battery is in one of the charging state or discharging state to produce said estimated state of charge.

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