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Method for battery capacity estimation

  • US 8,084,996 B2
  • Filed: 06/27/2008
  • Issued: 12/27/2011
  • Est. Priority Date: 06/27/2008
  • Status: Active Grant
First Claim
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1. A method of estimating a battery capacity for a battery, the method comprising the steps of:

  • (a) determining a state of charge at a first instant of time and at a second instant of time independent of battery capacity;

    (b) determining a difference in the state of charge between the first instant of time and the second instant of time;

    (c) calculating a net coulomb flow between the first instant of time and the second instant of time; and

    (d) determining the battery capacity as a function of the change in the state of charge and the net coulomb flow.

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