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AssigneeKoninklijke Philips Electronics N.V.
InventorsHans Feil, Hendrik Johannes Bergveld, Johann Reiner Godefridus Cornelis Maria Van Beek
Estimating the term…
Disclosed is a method of estimating the state of charge of a rechargeable lithium battery. The first step of said method is to determine whether the battery is in an equilibrium state or in a non-equilibrium state. If the battery is determined to be in an equilibrium state, the voltage across the battery is measured and converted into an equilibrium state-of-charge value. If the battery is in a non-equilibrium state, the charge withdrawn from or supplied to the battery is calculated by means of current integration, and this charge is subtracted from or added to a state-of-charge value calculated earlier. Also disclosed is a method of estimating the time that an application can be used under predefined conditions.
A method of estimating the state-of-charge for a rechargeable lithium battery, comprising the steps of:
An electronic network model of a rechargeable battery comprising at least one RC circuit wherein the values of the resistor and the capacitor are related to a time-dependent part of the overpotential of the battery, at least two resistors wherein the value of one resistor is related to the remaining capacity of the battery which corresponds to the overpotential, and a voltage source whose value is related to the remaining capacity of the battery which corresponds to the equilibrium voltage.
Dependencies are inferred from the claim text.