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Battery monitoring system

  • US 5,345,163 A
  • Filed: 03/09/1992
  • Issued: 09/06/1994
  • Est. Priority Date: 06/05/1991
  • Status: Expired due to Term
First Claim
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1. A method of monitoring the charge on an electric storage battery having two terminals with a voltage across the terminals, said method comprising:

  • monitoring the voltage across the terminals of the battery;

    producing a Do Not Charge signal whenever the monitored voltage exceeds a first predetermined voltage;

    maintaining the Do Not Charge signal until the monitored voltage falls below the first predetermined voltage for a period longer than a first predetermined period, then eliminating the Do Not Charge signal and producing an OK To Charge signal; and

    maintaining the OK To Charge signal until the monitored voltage falls below a second predetermined voltage less than the first predetermined voltage for a period longer than a second predetermined period, then eliminating the OK To Charge signal and producing a Must Charge signal.

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