The invention relates to a method for estimating or predicting an internal battery state of at least one battery unit (203) within an electric energy storage system (201), such as in a vehicle (200), the method comprising:- obtaining operational data of the electric energy storage system relating to operating conditions of the electric energy storage system,- feeding the obtained operational data to a non-linear state observer adapted to estimate and/or predict the internal battery state of the at least one battery unit in a series of time steps, such that an observer error of the non-linear state observer converges towards zero, or towards a value close to zero,- based on at least the obtained operational data, estimating or predicting the internal battery state using the non-linear state observer.The non-linear state observer is a switched multi-gain observer switching between at least two different static observer gains, wherein the observer gain to be used is selected based on a predicted or estimated value of the internal battery state as determined by the nonlinear state observer.


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    Title :

    A METHOD FOR ESTIMATING OR PREDICTING AN INTERNAL BATTERY STATE OF A BATTERY UNIT


    Additional title:

    VERFAHREN ZUR SCHÄTZUNG ODER VORHERSAGE EINES INTERNEN BATTERIEZUSTANDS EINER BATTERIEEINHEIT
    PROCÉDÉ PERMETTANT D'ESTIMER OU DE PRÉDIRE L'ÉTAT INTERNE D'UNE BATTERIE D'UNE UNITÉ DE BATTERIE


    Contributors:

    Publication date :

    2023-12-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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