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    ELECTRIFIED VEHICLE BATTERY STATE-OF-CHARGE MONITORING WITH AGING COMPENSATION
    31.
    发明申请
    ELECTRIFIED VEHICLE BATTERY STATE-OF-CHARGE MONITORING WITH AGING COMPENSATION 审中-公开
    电动车辆电池充电状态监测与老化补偿

    公开(公告)号：US20160103185A1

    公开(公告)日：2016-04-14

    申请号：US14513400

    申请日：2014-10-14

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Xiaoguang Chang ,  Chuan He ,  Xu Wang ,  Josephine S. Lee

    IPC: G01R31/36

    CPC classification number: G01R31/3835 ,  G01R31/367 ,  G01R31/374 ,  G01R31/392

    Abstract: Determination of an electric vehicle battery state-of-charge (SOC) based on measuring open circuit voltage is subject to error as the relationship changes over time. A method is provided for updating the relationship during aging. A charging current is applied to the battery cell. A favorable charging condition is detected in response to a predetermined charging current. A charging slope vector is compiled during the charging condition comprising a plurality of slope values over respective state-of-charge increments. A plurality of SOC-OCV slope vectors are determined corresponding to a plurality of stored SOC-OCV aging curves, each SOC-OCV slope vector comprising a plurality of slope values over equivalent state-of-charge increments. One of the stored SOC-OCV aging curves is selected having an SOC-OCV slope vector best fitting the charging slope vector for use in converting measured OCV values to battery cell SOC values.

    Abstract translation: 基于测量开路电压来确定电动车辆电池的充电状态（SOC）随着时间的变化而发生错误。 提供了一种在老化过程中更新关系的方法。 充电电流被施加到电池单元。 响应于预定的充电电流来检测良好的充电条件。 在充电状态期间编译充电斜率矢量，其中包括在各自的充电增量上的多个斜率值。 对应于多个存储的SOC-OCV老化曲线确定多个SOC-OCV斜率矢量，每个SOC-OCV斜率矢量包括超过等效荷电增量的多个斜率值。 选择存储的SOC-OCV老化曲线之一，其具有最佳拟合用于将测量的OCV值转换为电池单元SOC值的充电斜率矢量的SOC-OCV斜率矢量。

    Battery Power Capability Estimation at Vehicle Start
    33.
    发明申请
    Battery Power Capability Estimation at Vehicle Start 有权
    车辆启动时的电池功率能力估计

    公开(公告)号：US20150064510A1

    公开(公告)日：2015-03-05

    申请号：US14014992

    申请日：2013-08-30

    Applicant: Ford Global Technologies, LLC

    Inventor： Xu Wang ,  Yonghua Li ,  Richard Dyche Anderson ,  Kevin Vander Laan ,  Xiaoguang Chang

    IPC: H01M10/48

    CPC classification number: H01M10/48 ,  H01M10/486 ,  H01M10/63 ,  H01M10/633 ,  H01M2220/20

    Abstract: A vehicle is disclosed comprising a battery and a controller. Projected battery impedance parameters are calculated based on predetermined parameter values and historical parameter values generated by a battery parameter estimation model. The values may be weighted according to time data associated with the historical impedance parameter values and a temperature of the battery. Recent historical impedance parameter values may affect the projected battery impedance parameter values more than older historical impedance parameter values. The model is initialized with projected parameter values at vehicle initialization. Battery power capability is calculated using the projected parameter values for a period of time following vehicle initialization. After the period of time following vehicle initialization, battery power capability is calculated using impedance parameters generated by the model. The period of time following vehicle initialization may end when the model output has converged to a stable solution.

    Abstract translation: 公开了一种包括电池和控制器的车辆。 基于由电池参数估计模型生成的预定参数值和历史参数值来计算投影电池阻抗参数。 这些值可以根据与历史阻抗参数值和电池温度相关联的时间数据进行加权。 最近的历史阻抗参数值可能会比旧的历史阻抗参数值影响预计的电池阻抗参数值。 该模型在车辆初始化时用投影参数值进行初始化。 使用车辆初始化之后的一段时间内的投影参数值来计算电池功率能力。 在车辆初始化后的一段时间内，使用模型生成的阻抗参数来计算电池功率能力。 车辆初始化后的时间段可能在模型输出收敛到稳定的解决方案时结束。

    Balancing cells of a traction battery using statistical analysis
    37.
    发明授权
    Balancing cells of a traction battery using statistical analysis 有权

    公开(公告)号：US11225170B2

    公开(公告)日：2022-01-18

    申请号：US16691774

    申请日：2019-11-22

    Applicant: Ford Global Technologies, LLC

    Inventor： Rui Wang ,  Xiao Guang Yang ,  Yuan Zhang ,  Xu Wang

    IPC: B60L58/22 ,  B60L58/12 ,  H02J7/00 ,  B60K6/28

    Abstract: A vehicle includes a traction battery having a plurality of battery cells and a balance circuit configured to selectively discharge one or more of the battery cells. A controller is programmed to estimate charge capacities of the battery cells and determine a standard deviation of the estimated capacities. The controller is further programmed to determine a skewness of the estimated capacities. The controller is also programmed to, in response to the skewness exceeding a first threshold, command the balance circuit to discharge one or more of the battery cells when a state of charge (SOC) of the traction battery is less than a second threshold, and, in response to the skewness being less than the first threshold, command the balance circuit to discharge one or more of the battery cells when the SOC of the traction battery is greater than the second threshold.

    System and method for battery cell balancing
    38.
    发明授权
    System and method for battery cell balancing 有权

    公开(公告)号：US10992145B2

    公开(公告)日：2021-04-27

    申请号：US16021420

    申请日：2018-06-28

    Applicant: Ford Global Technologies, LLC

    Inventor： Rui Wang ,  Xu Wang ,  Patterson Kaduvinal Abraham

    IPC: H02J7/00 ,  B60Q9/00 ,  B60L58/20

    Abstract: A system comprises a processor, configured to perform balancing on a commanded cell referring to a reference cell, and responsive to detecting balancing time exceeding a threshold time and state of charge (SOC) difference being above a tolerance, abort the balancing, and generate an error message. The threshold time depends on an average balancing time calculated using the SOC difference, a predetermined commanded cell capacity, and a predetermined balancing current.

    System and method for indicating battery age
    39.
    发明授权
    System and method for indicating battery age 有权

    公开(公告)号：US10793008B2

    公开(公告)日：2020-10-06

    申请号：US14887867

    申请日：2015-10-20

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Xiaohong Nina Duan ,  Xu Wang

    IPC: H01M10/48 ,  H01M10/42 ,  B60L58/13 ,  B60L58/16 ,  B60L11/18 ,  B60K35/00 ,  B60K6/20

    Abstract: A vehicle includes a traction battery and a controller. The controller is programmed to output an age value of the traction battery based on a ratio of a reference capacity value to an initial reference capacity. The reference capacity value is derived from a mean and a standard deviation of a plurality of historical battery capacity values and has a predetermined probability of being less than an actual battery capacity. The controller is programmed to adjust a battery control strategy based on the age value. The vehicle includes an instrument cluster that is configured to display the age value.

    Methods and apparatus for detecting electrical leakage in a vehicle
    40.
    发明授权
    Methods and apparatus for detecting electrical leakage in a vehicle 有权

    公开(公告)号：US10725115B2

    公开(公告)日：2020-07-28

    申请号：US14515999

    申请日：2014-10-16

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Xiaoguang Chang ,  Xu Wang ,  Chuan He

    IPC: G01R31/50 ,  G01R31/00

    Abstract: A vehicle includes a battery pack, an electric motor, and a contactor to electrically connect the pack and motor. The contactor is configured with a control circuit to electrically connect the pack and motor. The control circuit includes a leak detection sensor. The vehicle further includes a controller to output a leakage resistance associated with the pack. The leakage resistance is based on a voltage of the pack and a leak voltage detected by the sensor while the contactor is closed.

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