Electronic battery testing device and method for testing batteries

  • US 6,037,778 A
  • Filed: 11/05/1997
  • Issued: 03/14/2000
  • Est. Priority Date: 11/05/1997
  • Status: Expired due to Term
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First Claim
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1. A method for evaluating the condition of a direct current energy storage unit, said method comprising:

  • (a) applying a first load to said unit for a first time period,(b) measuring a first voltage of said unit at the end of said first time period,(c) applying a second load to said unit for a second time period, said second load being greater than said first load,(d) measuring a second voltage of said unit at the end of said second time period,(e) analyzing the condition of said unit based on the voltage drop between said first voltage and said second voltage, and(f) monitoring a recovery voltage of the unit for a predetermined time period after removing the second load.

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