Method and apparatus for electronically evaluating the internal temperature of an electrochemical cell or battery

  • US 6,137,269 A
  • Filed: 09/01/1999
  • Issued: 10/24/2000
  • Est. Priority Date: 09/01/1999
  • Status: Expired due to Term
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First Claim
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1. Apparatus for determining the internal temperature of an electrochemical cell or battery comprising:

  • electrical excitation circuitry adapted to apply time-varying electrical excitation to said cell or battery;

    response sensing circuitry configured to sense time-varying electrical response of said cell or battery generated as a result of said time-varying electrical excitation; and

    computation circuitry responsive to said time-varying excitation and to said time-varying response and adapted to calculate the time constant of a particular parallel G-C subcircuit comprising part of an electrical circuit representation of said cell or battery, said time constant characterized by varying inversely with internal temperature, said computation circuitry further adapted to evaluate said internal temperature from the computed value of said time constant.

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