Patent ID: 7327147
Filing Date: 2008-02-05
Classification: G01R

Abstract:
1. A method for determining characteristic variables for electrical states of an energy storage battery comprising: subdividing an electrolyte volume of the battery into at least two electrolyte volume components with associated electrolyte balancing areas, which are located horizontally one above the other; defining at least two electrode plate balancing areas by subdividing the total resistance of electrode plates in the battery into resistance components for the defined electrode plate balancing areas and by subdividing the total energy storage capacity of the electrode plates into energy storage capacity components for the defined electrode plate balancing areas, which are located horizontally one above the other in the same way as the electrolyte balancing areas; determining the electrolyte concentration of the electrolyte volume components for the defined electrolyte balancing areas; determining the amounts of charge which are held in the electrode plates in each of the electrode plate balancing areas; and determining at least one characteristic variable for associated electrical states of the battery using a mathematical model for describing an electrical equivalent circuit which utilizes at least the variables of the resistance components, the energy storage capacity components, the electrolyte concentration, and the amounts of charge held.