Method and apparatus for determining the condition of a battery through the use of multiple battery tests

  • US 6,144,185 A
  • Filed: 03/22/1999
  • Issued: 11/07/2000
  • Est. Priority Date: 03/22/1999
  • Status: Expired due to Fees
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First Claim
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1. A method for determining the state of charge of a battery, the method comprising:

  • a) obtaining voltage readings from the battery when a light load is coupled to the battery;

    b) obtaining voltage readings from the battery when the light load is removed from the battery;

    c) obtaining voltage readings from the battery when a heavy load is coupled to the battery;

    d) obtaining voltage readings from the battery when the heavy load is removed from the battery;

    e) coupling a conductance tester to the battery to obtain cold cranking amp readings from the battery; and

    f) charging the battery and monitoring at least one battery parameter to determine whether the battery is capable of being charged.

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