METHOD FOR ESTIMATING THE OPEN-CIRCUIT VOLTAGE OF AN ELECTROCHEMICAL ACCUMULATOR OF A BATTERY SYSTEM

The invention relates to a method for determining the open-circuit voltage of an electrochemical accumulator. The method comprises the steps of continuously measuring (202) a voltage signal, continuously calculating (203) a logarithmic signal of the voltage depending on said voltage signal as a func...

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Bibliographic Details
Main Authors BAGHDADI, Issam, CHAABANE, Fedi
Format Patent
LanguageEnglish
French
German
Published 08.06.2022
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:The invention relates to a method for determining the open-circuit voltage of an electrochemical accumulator. The method comprises the steps of continuously measuring (202) a voltage signal, continuously calculating (203) a logarithmic signal of the voltage depending on said voltage signal as a function of the value in logarithmic form of time, checking (205) whether the logarithmic signal contains a point of inflection and, in the event of detecting at least one point of inflection at a second time, estimating (207a) the open-circuit voltage parameter symmetrically about the point of inflection as a function at least of the value of the logarithmic signal at the second time. The invention is applicable in particular to the management of motor vehicle drivetrain battery systems.
Bibliography:Application Number: EP20190794599