Method for predicting the loading capability of an electrochemical element

  • US 6,909,261 B2
  • Filed: 05/29/2002
  • Issued: 06/21/2005
  • Est. Priority Date: 06/01/2001
  • Status: Active Grant
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First Claim
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1. A method for predicting loading capability of a battery comprising:

  • measuring current I, voltage U and temperature T of the battery;

    forming an equivalent circuit with an equivalent circuit diagram comprising elements Uo, R, and CS, wherein Uo is voltage at t=o, R is resistance and CS is capacitance;

    correcting input voltage U′

    of the equivalent circuit diagram with respect to measured battery voltage U, the correcting containing as variables only current I, voltage U and temperature T and as a nonlinear term a logarithmic dependency on I;

    varying parameters of components of the equivalent circuit diagram and state variables;

    comparing measured values with corresponding values of responses of the equivalent circuit diagram of the battery; and

    determining the loading capability from matched parameters and state variables.

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