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    SOC ESTIMATING APPARATUS AND METHOD
    2.
    发明申请
    SOC ESTIMATING APPARATUS AND METHOD 有权

    公开(公告)号：US20210389381A1

    公开(公告)日：2021-12-16

    申请号：US17269392

    申请日：2020-02-10

    申请人： LG CHEM, LTD.

    发明人： Young-Jin KIM

    IPC分类号： G01R31/3842 ,  G01R31/392 ,  H01M10/48

    摘要： A SOC estimating apparatus according to an embodiment of the present disclosure includes: a measuring unit configured to measure at least one of voltage, current and temperature of a battery; a noise generating unit configured to generate noise corresponding to the voltage of the battery based on a plurality of preset voltage regions; a filtering unit configured to receive the noise generated by the noise generating unit and filter the generated noise to correspond to the voltage of the battery based on the plurality of preset voltage regions; and a SOC estimating unit configured to estimate a SOC of the battery based on at least one of voltage, current and temperature of the battery and the noise filtered by the filtering unit.

    DEVICE FOR ESTIMATING STATE OF CHARGE OF BATTERY
    3.
    发明申请
    DEVICE FOR ESTIMATING STATE OF CHARGE OF BATTERY 有权

    公开(公告)号：US20210263107A1

    公开(公告)日：2021-08-26

    申请号：US17251597

    申请日：2019-12-18

    申请人： LG CHEM, LTD.

    发明人： Young-Jin KIM

    IPC分类号： G01R31/3842

    摘要： A device for estimating state of charge of battery of the present disclosure includes: a sensing unit configured to measure at least one of a first voltage and an OCV of a battery; and a processor operably coupled to the sensing unit. The processor is configured to estimate a second voltage of the battery based on the OCV of the battery or a previously estimated first SOC, calculate a counted voltage error by counting a voltage error between the first voltage and the second voltage of the battery, correct the second voltage of the battery depending on whether the counted voltage error is included in a reference error range, and estimate a first SOC of the battery based on the second voltage or the corrected second voltage.

    BATTERY MANAGEMENT SYSTEM, BATTERY MANAGEMENT METHOD, BATTERY PACK AND ELECTRIC VEHICLE
    4.
    发明申请
    BATTERY MANAGEMENT SYSTEM, BATTERY MANAGEMENT METHOD, BATTERY PACK AND ELECTRIC VEHICLE 有权

    公开(公告)号：US20210199724A1

    公开(公告)日：2021-07-01

    申请号：US17263717

    申请日：2020-02-07

    申请人： LG CHEM, LTD.

    发明人： Young-Jin KIM

    IPC分类号： G01R31/382 ,  H01M10/42 ,  H01M10/48 ,  G01K7/22

    摘要： Provided are a battery management system, a battery management method, a battery pack and an electric vehicle. The battery management system includes a sensing unit to generate battery information indicating a current, a voltage and a temperature of a battery, and a control unit. The control unit determines a temporary estimate for a SOC in a current cycle using a time update process of an extended Kalman filter based on a previous estimate indicating a SOC in a previous cycle and the battery information. The control unit determines open circuit voltage (OCV) information based on the temporary estimate. The control unit determines a definitive estimate indicating the SOC in the current cycle using a measurement update process of the extended Kalman filter based on the temporary estimate, the OCV information and the battery information.

    METHOD, APPARATUS AND RECORDING MEDIUM FOR ESTIMATING PARAMETERS OF BATTERY EQUIVALENT CIRCUIT MODEL
    5.
    发明申请
    METHOD, APPARATUS AND RECORDING MEDIUM FOR ESTIMATING PARAMETERS OF BATTERY EQUIVALENT CIRCUIT MODEL 有权

    公开(公告)号：US20210165046A1

    公开(公告)日：2021-06-03

    申请号：US16610208

    申请日：2018-11-10

    申请人： LG CHEM, LTD.

    发明人： Young-Jin KIM ,  Sun-Young CHA

    IPC分类号： G01R31/367 ,  G01R31/389

    摘要： Disclosed is a method and apparatus for estimating parameters of a battery equivalent circuit model. The battery equivalent circuit model includes a first resistor, a second resistor and a capacitor. The method according to an embodiment of the present disclosure includes reading a pulse discharge profile corresponding to a parameter estimation condition from a plurality of pre-stored pulse discharge profiles, wherein the pulse discharge profile includes a first number of terminal voltages sequentially measured from a battery having a specific SOC in a predetermined cycle while the battery is discharged with a specific constant current from an OCV corresponding to the specific SOC to a lower limit of discharge voltage at a specific temperature, extracting a second number of terminal voltages between the OCV and a threshold voltage from the first number of terminal voltages, and estimating a resistance value of the first resistor and a resistance value of the second resistor based on the OCV, the constant current and the second number of terminal voltages.

    APPARATUS AND METHOD FOR ESTIMATING STATE OF CHARGE OF SECONDARY BATTERY
    6.
    发明申请
    APPARATUS AND METHOD FOR ESTIMATING STATE OF CHARGE OF SECONDARY BATTERY 有权

    公开(公告)号：US20210055348A1

    公开(公告)日：2021-02-25

    申请号：US16640184

    申请日：2018-09-09

    申请人： LG CHEM, LTD.

    发明人： Young-Jin KIM ,  Sun-Young CHA

    IPC分类号： G01R31/367 ,  G01R31/3842 ,  G01R31/388 ,  G01R31/374

    摘要： Provided is an apparatus and method for estimating a state of charge of a secondary battery. The apparatus includes a sensor unit configured to measure a voltage and a current of the secondary battery in a predetermined cycle, and a control unit operably coupled to the sensor unit. The control unit is configured to estimate the state of charge of the secondary battery in the predetermined cycle based on the voltage and the current measured by the sensor unit. The control unit is further configured to determine an operating state of the secondary battery as any one of a linear operating state and a non-linear operating state based on a threshold voltage and the measured voltage, and then determine first process noise indicating inaccuracy of a current integration model and second process noise indicating inaccuracy of an equivalent circuit model according to the determined operating state.