Device and method for determining characteristic variables for batteries
First Claim
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.
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Abstract
A method for determining characteristic variables for electrical states of an energy storage battery includes subdividing an electrolyte volume of the battery into at least two electrolyte volume components with associated electrolyte balancing areasabd 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. The method further includes determining the electrolyte concentration of the electrolyte volume components for the defined electrolyte balancing areas and determining the amounts of charge which are held in the electrode plates in each of the electrode plate balancing areas. At least one characteristic variable for associated electrical states of the battery is determined using a mathematical model.
161 Citations
19 Claims
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1. A method for determining characteristic variables for electrical states of an energy storage battery comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A monitoring device for an electrochemical energy storage battery comprising:
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a measurement unit for measurement of the battery terminal voltage, of the battery terminal current and of the battery temperature; and an evaluation unit; wherein the evaluation unit is designed to carry out a method by programming of a microprocessor unit, the method comprising a method for determining characteristic variables for electrical states of an energy storage battery, the method 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.
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Specification