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    Methods to Determine Battery Cell Voltage Relaxation Time Based on Cell Usage History and Temperature
    3.
    发明申请
    Methods to Determine Battery Cell Voltage Relaxation Time Based on Cell Usage History and Temperature 审中-公开
    基于电池使用历史和温度确定电池电池电压松弛时间的方法

    公开(公告)号：US20160011269A1

    公开(公告)日：2016-01-14

    申请号：US14330458

    申请日：2014-07-14

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

    Inventor： Xu Wang ,  Xiaoguang Chang ,  Chuan He

    IPC: G01R31/36

    CPC classification number: G01R31/367 ,  G01R31/3835

    Abstract: Lithium ion battery state of charge (SOC) is a function of open circuit voltage (OCV). Battery internal diffusion process needs to be nearly completed to be able to measure battery open circuit voltage. The length of the minimum settling time depends on the battery type, usage and temperature. Described are methods to determine electric vehicle battery voltage relaxation time based on battery temperature and usage history.

    Abstract translation: 锂离子电池充电状态（SOC）是开路电压（OCV）的函数。 电池内部扩散过程需要几乎完成，以便能够测量电池的开路电压。 最小建立时间的长度取决于电池的类型，用途和温度。 描述了基于电池温度和使用历史确定电动车辆电池电压松弛时间的方法。

    In-range current sensor fault detection
    5.
    发明授权
    In-range current sensor fault detection 有权

    公开(公告)号：US10124789B2

    公开(公告)日：2018-11-13

    申请号：US14015344

    申请日：2013-08-30

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

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

    IPC: B60W20/10 ,  B60W20/00 ,  B60L11/18 ,  B60W10/26 ,  B60L3/00 ,  B60W20/50 ,  B60W10/08 ,  G01R35/00

    Abstract: A current sensor fault detection system is disclosed which enables detection of a current sensor fault while the current sensor is operating and providing a current sensor output which is within a normal operating range. The current sensor is monitored by at least one controller which compares a change in battery state of charge error with a predetermined threshold. The change in battery state of charge error is a difference between a first change in battery state of charge calculated by integrating battery current with respect to a time and a second change in battery state of charge calculated based on the battery open circuit voltage during the time.

    Method to Adjust Battery Minimum State of Charge Limits Based on Battery Power Capability
    7.
    发明申请
    Method to Adjust Battery Minimum State of Charge Limits Based on Battery Power Capability 有权
    基于电池功率能力调整电池最小充电限制状态的方法

    公开(公告)号：US20150306971A1

    公开(公告)日：2015-10-29

    申请号：US14264554

    申请日：2014-04-29

    Applicant: Ford Global Technologies, LLC

    Inventor： Xiaoguang Chang ,  Chuan He ,  Xu Wang

    IPC: B60L11/18

    CPC classification number: B60L11/1862 ,  B60L11/1857 ,  B60L11/1866 ,  B60L2240/545 ,  B60L2240/547 ,  B60L2240/549 ,  B60W10/00 ,  H02J7/1461 ,  H02J2007/0037 ,  H02J2007/004 ,  Y02T10/7011 ,  Y02T10/7016 ,  Y02T10/7044 ,  Y02T10/7061

    Abstract: A hybrid-electric vehicle includes a traction battery. A controller may operate the traction battery within certain state of charge and voltage limits. The controller may define a minimum operating voltage or state of charge below which no power may be requested from the traction battery. The minimum voltage and state of charge may be based on an electrical resistance of the traction battery. The voltage may also be based on a minimum power level required to crank the engine while meeting emissions standards. As the battery ages, the minimum voltage level may be adjusted such that the minimum power level is available at the minimum voltage level.

    Abstract translation: 混合电动车辆包括牵引电池。 控制器可以在一定的充电状态和电压限制内操作牵引电池。 控制器可以定义最小工作电压或充电状态，在该状态下，不能从牵引电池请求电力。 最小电压和充电状态可以基于牵引电池的电阻。 电压也可以基于在满足排放标准的情况下起动发动机所需的最小功率水平。 随着电池老化，可以调节最小电压电平，使得最小功率电平在最小电压电平下可用。

    IN-RANGE CURRENT SENSOR FAULT DETECTION
    8.
    发明申请
    IN-RANGE CURRENT SENSOR FAULT DETECTION 审中-公开
    内部电流传感器故障检测

    公开(公告)号：US20150066262A1

    公开(公告)日：2015-03-05

    申请号：US14015344

    申请日：2013-08-30

    Applicant: FORD GLOBAL TECHNOLOGIES, LLC

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

    IPC: B60W20/00 ,  B60W10/26 ,  B60L11/18

    CPC classification number: B60W10/26 ,  B60L3/0038 ,  B60L11/1861 ,  B60L11/1864 ,  B60L2240/547 ,  B60L2240/549 ,  B60L2240/80 ,  B60L2270/12 ,  B60W10/08 ,  B60W20/50 ,  B60W2510/244 ,  B60W2710/08 ,  G01R35/00 ,  Y02T10/7005 ,  Y02T10/7044 ,  Y02T10/7061

    Abstract: A current sensor fault detection system is disclosed which enables detection of a current sensor fault while the current sensor is operating and providing a current sensor output which is within a normal operating range. The current sensor is monitored by at least one controller which compares a change in battery state of charge error with a predetermined threshold. The change in battery state of charge error is a difference between a first change in battery state of charge calculated by integrating battery current with respect to a time and a second change in battery state of charge calculated based on the battery open circuit voltage during the time.

    Abstract translation: 公开了一种电流传感器故障检测系统，其能够在电流传感器工作时检测电流传感器故障，并提供在正常工作范围内的电流传感器输出。 至少一个控制器监测电流传感器，该控制器将电池电量状态的变化与预定的阈值进行比较。 电池充电状态的变化是电池电流相对于时间积分的电池状态的第一变化与在时间期间基于电池开路电压计算出的电池电量状态的第二变化的差 。

    Methods and apparatus for detecting electrical leakage in a vehicle
    9.
    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
    10.
    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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