Device and method for determining characteristic variables for batteries

  • US 20050189948A1
  • Filed: 02/04/2005
  • Published: 09/01/2005
  • Est. Priority Date: 02/04/2004
  • Status: Active Grant
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First Claim
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1. Method for determination of characteristic variables for electrical states of an energy storage battery, having the following steps:

  • a) Subdividing the electrolyte volume (v) of the energy storage battery into at least two electrolyte volume components (vi) with associated electrolyte balancing areas (Si);

    b) Defining of at least two electrode plate balancing areas (Pk) by subdividing the total resistance (RM) of the electrode plates in the energy storage battery into resistance components (RkM) for the defined electrode plate balancing areas (Pk), and the total energy storage capacity (KM) of the electrode plates in the energy storage battery into energy storage capacity components (KkM) for the defined electrode plate balancing areas (Pk);

    c) Determining of the electrolyte concentration (ri) of the electrolyte volume components (vi) for the defined electrolyte balancing areas (Si);

    d) Determining of the amounts of charge (KEkM) which are in each case held in the electrode plates in the electrode plate balancing areas (Pk); and

    e) Determining of at least one characteristic variable for associated electrical states of the energy storage battery by means of a mathematical model for describing an electrical equivalent circuit at least by means of the variables of the resistance components (RkM), of the energy storage capacity components (KkM), of the electrolyte concentration (ri) and of the amounts of charge (KEkM) held.

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