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    Modeling changes in the state-of-charge open circuit voltage curve by using regressed parameters in a reduced order physics based model

    Modeling changes in the state-of-charge open circuit voltage curve by using regressed parameters in a reduced order physics based model

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    A method for modeling changes in the state of charge vs. open circuit voltage (SOC-OCV) curve for a lithium-ion battery cell as it ages. During battery pack charging, voltage and current data are gathered for a battery cell. A set of state equations are used to determine the stoichiometry and state of charge of the cathode half-cell based on the charging current profile over time. The voltage and current data, along with the stoichiometry and state of charge of the cathode half-cell, are then used to estimate maximum and minimum solid concentration values at the anode, using an error function parameter regression/optimization. With stoichiometric conditions at both the cathode and anode calculated, the cell's capacity and a new SOC-OCV curve can be determined.

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    Titel :

    Modeling changes in the state-of-charge open circuit voltage curve by using regressed parameters in a reduced order physics based model

    Beteiligte:
    LASKOWSKY PATRICIA M (Autor:in) / KOCH BRIAN J (Autor:in) / FRISCH DAMON R (Autor:in) / REBBA RAMESH (Autor:in) / JOHNSON KURT M (Autor:in)
    Erscheinungsdatum :

    2015-09-08

    Medientyp :

    Patent

    Format :

    Elektronische Ressource

    Sprache :

    Englisch

    Klassifikation :

    IPC:    H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES

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