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    Battery Open-Circuit Voltage Measurement Using Reverse Current Pulse
    31.
    发明申请
    Battery Open-Circuit Voltage Measurement Using Reverse Current Pulse 有权
    使用反向电流脉冲进行电池开路电压测量

    公开(公告)号：US20160272080A1

    公开(公告)日：2016-09-22

    申请号：US14664343

    申请日：2015-03-20

    Applicant: Ford Global Technologies, LLC

    Inventor： Xiaoguang Chang ,  Xu Wang ,  Szushen Ho ,  Chuan He

    IPC: B60L11/18 ,  H02J7/00

    CPC classification number: B60L11/1861 ,  B60L11/1838 ,  H02J7/0047 ,  H02J2007/005 ,  Y02T10/7005 ,  Y02T10/7022 ,  Y02T90/14

    Abstract: A battery management system for a vehicle includes a controller programmed to apply a current pulse to reverse a current flow through a battery to reduce or remove cell polarization. After the current pulse, an open-circuit voltage is measured as the terminal voltage of the battery. The settling time for the terminal voltage to approach the open-circuit voltage is reduced after the current pulse. The magnitude of the current pulse is based on a battery state of charge, a battery temperature, and a current magnitude prior to the current pulse.

    Abstract translation: 用于车辆的电池管理系统包括被编程为施加电流脉冲以逆转通过电池的电流以减少或去除电池极化的控制器。 在电流脉冲之后，测量开路电压作为电池的端子电压。 电流脉冲后，端子电压接近开路电压的稳定时间减小。 电流脉冲的幅度取决于电池充电状态，电池温度和当前脉冲之前的电流大小。

    ELECTRIFIED VEHICLE BATTERY STATE-OF-CHARGE MONITORING WITH AGING COMPENSATION
    32.
    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。

    Traction Battery Air Thermal Management Control System
    33.
    发明申请
    Traction Battery Air Thermal Management Control System 审中-公开
    牵引电池空气热管理控制系统

    公开(公告)号：US20150291054A1

    公开(公告)日：2015-10-15

    申请号：US14253076

    申请日：2014-04-15

    Applicant: Ford Global Technologies, LLC

    Inventor： Xiaohong Nina Duan ,  Chuan He

    IPC: B60L11/18 ,  B60K1/04

    CPC classification number: H01M10/625 ,  B60K1/04 ,  B60L58/26 ,  H01M10/486 ,  H01M10/613 ,  H01M10/6563 ,  H01M2220/20

    Abstract: A vehicle traction battery system may include a battery pack, a fan configured to direct air flow to the pack, and a controller. The controller may be programmed to, in response to a predicted pack temperature being greater than a first predefined temperature, direct the fan to operate at a predefined generally constant speed that does not change with vehicle speed or engine on/off state until the predicted battery pack temperature falls below a second predefined temperature. A method is also provided for cooling the vehicle traction battery system based on a predicted battery pack temperature and a heat generation rate.

    Abstract translation: 车辆牵引电池系统可以包括电池组，用于将空气流引导到组件的风扇和控制器。 控制器可以被编程为响应于预测的包装温度大于第一预定温度，引导风扇以预定的大致恒定的速度操作，该速度不随车辆速度或发动机开/关状态而改变，直到预测的电池 包装温度低于第二预定温度。 还提供了一种基于预测的电池组温度和发热率来冷却车辆牵引电池系统的方法。

    Methods and apparatus for detecting electrical leakage in a vehicle
    35.
    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.

    Estimating battery capacity in an electric vehicle
    36.
    发明授权
    Estimating battery capacity in an electric vehicle 有权

    公开(公告)号：US10322634B2

    公开(公告)日：2019-06-18

    申请号：US14882873

    申请日：2015-10-14

    Applicant: Ford Global Technologies, LLC

    Inventor： Xu Wang ,  Chuan He ,  Xiaoguang Chang

    IPC: H01M10/00 ,  H01M10/02 ,  B60L11/18

    Abstract: Vehicles that use electric power as a motive force may use accurate measurements of battery power for numerous purposes, e.g., battery characteristics, state of charge of the battery, travel distance remaining for the vehicle and the like. A traction battery measurement should be taken when the battery is fully relaxed, i.e., the battery is neither being charged nor providing power and a time period thereafter when the battery chemistry reaches a steady state. A controller or methods may determine if the battery is relaxed and if the battery is not relaxed, delay charging or discharging of the traction battery to allow accurate battery capacity determination. The controller may control a battery charger to ensure the battery is fully relaxed before sensing battery characteristics.

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