Enhanced voltage-based fuel gauges and methods

  • US 8,203,305 B1
  • Filed: 07/02/2008
  • Issued: 06/19/2012
  • Est. Priority Date: 07/02/2008
  • Status: Active Grant
First Claim
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1. A method of monitoring current delivered by a battery comprising:

  • providing a model of a battery circuit that includes the battery dynamic electrical characteristics;

    monitoring the battery circuit terminal voltage;

    estimating the open circuit voltage of the battery circuit using the battery circuit model and the battery circuit terminal voltage, including during the application of a load on the battery circuit; and

    ,using the battery circuit model, estimating the current being delivered by the battery circuit responsive to the estimated open circuit voltage of the battery circuit and the battery circuit terminal voltage.

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