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    • 6. 发明申请
    • BATTERY SYSTEM FOR AN ELECTRIC VEHICLE, METHOD FOR DIAGNOSING A BATTERY SYSTEM, AND ELECTRIC VEHICLE
    • US20230073493A1
    • 2023-03-09
    • US17774573
    • 2020-10-02
    • Robert Bosch GmbH
    • Chrysanthos TzivanopoulosJohannes SwobodaThomas Schaedlich
    • B60L50/60G01R31/3835G01R31/327G01R31/396H02J7/00
    • The invention relates to a battery system (10) for an electric vehicle, comprising a battery pack (5) having a positive pole (22), a negative pole (21), at least one battery cell (2) and a pack voltage divider (25), and comprising at least one coupling network having a negative terminal (11) and a positive terminal (12), wherein the pack voltage divider (25) comprises a positive pack resistor (RP2) and a positive sub-pack-resistor (RSP2) which are connected to one another in series between the positive pole (22) and a reference point (50), and a negative pack resistor (RP1) and a negative sub-pack-resistor (RSP1) which are connected to one another in series between the negative pole (21) and the reference point (50). The at least one coupling network comprises a coupling voltage divider (15) having a positive coupling resistor (RK2) and a positive sub-coupling-resistor (RSK2) which are connected to one another in series between the positive terminal (12) and the reference point (50), and having a negative coupling resistor (RK1) an a negative sub-coupling-rcsistor (RSK1) which are connected to one another in series between the negative terminal (11) and the reference point (50). The invention also relates to a method for diagnosing a battery system (10) according to the invention, wherein a positive pack voltage (UP2) falling at the positive sub-pack-resistor (RSP2) is measured, a negative pack voltage (UP1) falling at the negative sub-pack-rcsistor (RSP I) is measured, a positive coupling voltage (UK2) falling at the positive sub-coupling-resistor (RSK2) is measured, a negative coupling voltage (UK1) falling at the negative sub-coupling-resistor (RSK1) is measured, and an evaluation of the measured voltages (UP1, UP2, UK1, UK2) is carried out. The invention also relates to an electric vehicle comprising a battery system (10) according to the invention.