Method and apparatus for monitoring and indicating the condition of a battery and the related circuitry

  • US 4,665,370 A
  • Filed: 09/15/1980
  • Issued: 05/12/1987
  • Est. Priority Date: 09/15/1980
  • Status: Expired due to Term
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First Claim
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1. A method for automatically monitoring and indicating the condition of a storage battery for an internal combustion engine in a vehicle when the engine is started, comprising the steps of:

  • (a) automatically detecting the non-loaded voltage of the battery prior to starting the engine;

    (b) automatically detecting the voltage of the battery under load when the cranking motor of the internal combustion engine is operated during engine start-up;

    (c) automatically comparing the non-loaded voltage of the battery to the voltage under engine cranking load during enging start-up; and

    ,(d) automatically indicating the relationship of said voltages by an indicator means to provide a visual indication of the condition of the battery every time the cranking motor of the internal combustion engine is operated to start the engine.

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