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Battery evaluation test system

  • US 5,061,898 A
  • Filed: 08/13/1990
  • Issued: 10/29/1991
  • Est. Priority Date: 08/13/1990
  • Status: Expired due to Fees
First Claim
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1. A method of evaluating the present capacity of a rechargeable battery, said method comprising the steps ofconnecting a known test load to the battery so that the battery supplies the test load with electrical current;

  • monitoring the battery voltage while the battery is connected to the test load;

    monitoring the current supplied to the test load by the battery, and determining the ampere-hours of energy delivered by the battery while it is connected to said test load; and

    determining when the acceleration of the monitored battery voltage changes from negative to positive, and then projecting the ampere-hours of energy that would be delivered by the battery for the remainder of the range of useful output voltages from the battery.

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