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Use-adaptive fuel gauging for battery powered electronic devices

  • US 7,107,160 B2
  • Filed: 10/09/2001
  • Issued: 09/12/2006
  • Est. Priority Date: 10/09/2001
  • Status: Expired due to Fees
First Claim
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1. A method of fuel gauging in an electronic device having a battery, the method comprising:

  • adapting the fuel gauging in the device to a use model, the use model comprising how the device is actually used by a user, wherein adapting the fuel gauging comprises;

    checking a charge level of the battery each time the battery is replaced;

    monitoring a net energy extracted from the battery as a function of time during use of the device by the user;

    updating an estimated total available battery energy, wherein the estimated total available battery energy is derived from the net energy extracted; and

    adapting the fuel gauging to the updated estimated total available battery energy,wherein checking the battery charge level comprises;

    detecting a battery replacement event;

    measuring the charge level of the battery; and

    comparing the measured charge level to an expected charge level range.

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