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Method and apparatus for testing batteries

  • US 4,827,220 A
  • Filed: 10/26/1987
  • Issued: 05/02/1989
  • Est. Priority Date: 10/26/1987
  • Status: Expired due to Fees
First Claim
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1. A circuit for testing the condition of a battery and having a pair of terminals to which a battery is adapted to be connected, said circuit comprising a series circuit of a plurality of resistors and a switching means, said resistors defining first and second junctions, control means for controlling said switching means to connect said resistors between said terminals, and sensing means for sensing the voltage levels at said first and second junctions of said resistors, said sensing means comprising threshold sensing means for producing first and second logic level outputs in response to determined voltages at said first and second junctions, and means for enabling said sensing means to sense the voltages at said first and second junctions, whereby the condition of a battery connected to said terminals is indicated by the voltages sensed at both said first and second junctions at any given time.

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