Smart battery with maintenance and testing functions

  • US 6,072,299 A
  • Filed: 01/26/1999
  • Issued: 06/06/2000
  • Est. Priority Date: 01/26/1998
  • Status: Expired due to Term
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First Claim
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1. A computer-implemented method for self monitoring a rechargeable battery'"'"'s ability to reliably deliver charge to a host device, the method comprising:

  • calculating a state of charge (SOC) that quantifies the ability of the rechargeable battery to deliver charge to a host device, the SOC being dynamically calculated by a monitoring circuit using a discharging SOC equation as charge is drawn from the battery and a charging SOC equation as charge is supplied to the battery;

    charging the rechargeable battery with a battery maintenance and testing device, the battery maintenance and testing device sending an end of charge message through a communication interface coupled to the monitoring circuit when the battery maintenance and testing device detects that the rechargeable battery has stopped accepting charge; and

    adjusting the SOC to a full charge capacity value if the SOC exceeds the full charge capacity value when the end of charge message is received by the rechargeable battery from the battery maintenance and testing system.

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