The invention relates to a battery unit (10) for use in a vehicle electrical system (50) of a motor vehicle, comprising a battery module (20) for producing a first voltage between a positive pole (12) and a negative pole (11), a battery sensor (52), which is electrically connected to the negative pole (11), and a control element (30), which has a first terminal (31) electrically connected to the positive pole (12) and which comprises a DC-to-DC converter (35). The DC-to-DC converter (35) generates a second voltage between a second terminal (32) of the control element (30) and the negative pole (11) in dependence on at least one state variable of the battery module (20), and the battery sensor (52) is electrically connected to the second terminal (32), the battery sensor (52) having means for measuring the second voltage and means for measuring a current flowing through the negative pole (11), or the battery sensor (52) comprising a current sensor and being connected to a control unit which has means for measuring the second voltage and/or means for determining a current flowing through the negative pole (11). The invention also relates to a method for operating a battery unit (10) according to the invention in a vehicle electrical system (50) of a motor vehicle, wherein the second voltage is generated by the DC-to-DC converter (35) of the control element (30) in dependence on the state variable of the battery module (20).


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    Title :

    BATTERY UNIT AND METHOD FOR OPERATING A BATTERY UNIT


    Contributors:

    Publication date :

    2021-05-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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 / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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