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    CONTROL AND MONITORING OF VEHICLE BATTERY BASED ON COULOMBIC EFFICIENCY RATIO
    21.
    发明申请
    CONTROL AND MONITORING OF VEHICLE BATTERY BASED ON COULOMBIC EFFICIENCY RATIO 有权

    公开(公告)号：US20250135946A1

    公开(公告)日：2025-05-01

    申请号：US18493916

    申请日：2023-10-25

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yongjie Zhu ,  Meng Jiang ,  Andrew C. Baughman ,  Xueyu Zhang ,  Chunhao J. Lee ,  Yue-Yun Wang

    IPC: B60L58/13 ,  B60L3/00 ,  B60L53/62 ,  G01R31/392 ,  G01R31/52

    Abstract: A method for monitoring a battery module in a vehicle includes selecting an upper cut-off voltage and a lower cut-off voltage for the battery module. The method includes charging the battery cell from an original state to a first benchmark voltage greater than an upper cut-off voltage, via a first charging process. The method includes discharging the battery cell from the first benchmark voltage to a second benchmark voltage less than a lower cut-off voltage, via a first discharging process. The battery module is then charged from the second benchmark voltage to the first benchmark voltage, via a second charging process. The method includes obtaining a ratio of a discharging capacity to a charging capacity of the battery module. Operation of the vehicle is controlled based in part on the ratio, including taking at least one remedial action if the ratio is less than a predefined threshold.

    DETERMINATION OF BATTERY MODULE AND SUB-PACK ASSOCIATION IN ELECTRICAL ENERGY STORAGE SYSTEMS
    23.
    发明申请
    DETERMINATION OF BATTERY MODULE AND SUB-PACK ASSOCIATION IN ELECTRICAL ENERGY STORAGE SYSTEMS 有权

    公开(公告)号：US20220069376A1

    公开(公告)日：2022-03-03

    申请号：US17007981

    申请日：2020-08-31

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrew C. Baughman ,  Thomas Timpf, JR. ,  Christine E. Cabrera

    IPC: H01M10/633 ,  H01M10/613 ,  H01M10/625 ,  H01M10/42 ,  H01M10/48

    Abstract: A battery system with cell groups arranged in modules and with plurality of modules arranged in individual battery sub-packs includes a controller network configured to monitor the sub-packs. The network includes a plurality of cell monitoring units (CMUs); each CMU connected to one module for processing data for respective cell groups. The network also includes multiple voltage sensors on each CMU, with each sensor detecting voltage across one cell group. The network additionally includes an electronic controller programmed with an algorithm and in wireless communication with each CMU. The algorithm identifies when electrical power is disconnected from the RESS and directs electrical current through a selected sub-pack after power is restored. The algorithm also interrogates voltage sensors of a particular CMU, detects a change in voltage triggered by the current, and records a cross-reference between the particular CMU and the selected sub-pack when the change in voltage is detected.

    METHOD AND SYSTEM FOR NOISE-TOLERANT RC RESPONSE PREDICTION
    24.
    发明申请
    METHOD AND SYSTEM FOR NOISE-TOLERANT RC RESPONSE PREDICTION 审中-公开

    公开(公告)号：US20200217899A1

    公开(公告)日：2020-07-09

    申请号：US16239188

    申请日：2019-01-03

    Applicant: GM Global Technology Operations LLC

    Inventor： Yue Fan ,  Russell K. Steele ,  Andrew C. Baughman ,  Peter Kung Chiang

    IPC: G01R31/389 ,  H02J7/00 ,  B60L58/12 ,  B60L58/14 ,  G01R31/00 ,  G01R31/367

    Abstract: An electrical system includes a voltage bus, voltage sensor(s) measuring a first voltage between a positive bus rail and electrical ground, and a second voltage between a negative bus rail and electrical ground, a bias resistor, and a controller. When the switch is closed, the controller measures four or more discrete voltage samples of the first and second voltages. The samples are grouped into first and second sample groups each having three discrete voltage samples, with the second and third voltage samples of the first group being the first and second samples of the second group. The controller estimates a steady-state voltage of the first and second voltages using the sample groups, prior to the first and second voltages converging on actual steady-state voltage values. The controller executes a corresponding control action when the steady-state voltage estimate is stable or unstable relative to a defined stability threshold.

    Battery cell voltage sensing circuit diagnostics
    25.
    发明授权
    Battery cell voltage sensing circuit diagnostics 有权

    公开(公告)号：US09857431B2

    公开(公告)日：2018-01-02

    申请号：US14339003

    申请日：2014-07-23

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrew C. Baughman

    IPC: G01R31/36 ,  G01R31/02

    CPC classification number: G01R31/3658 ,  G01R31/026

    Abstract: A system and method are disclosed for diagnosing an open circuit of a cell voltage sensing board. The board includes, for each cell, a line balancing resistor, a line sense resistor, and a gate. Each gate connects and disconnects a given line balancing resistor to and from a corresponding cell. A cell voltage is measured for a selected battery cell, and a controller determines if the selected battery cell is an uppermost or lowermost cell in the battery stack. A line sense resistance value is calculated for the selected battery cell using a first set of equations when the selected battery cell is the uppermost cell, a second set of equations when the selected battery cell is the lowermost cell, and a third set of equations when the selected battery cell is neither. A control action is executed when the calculated line sense resistance exceeds a calibrated resistance threshold.

    Method and system for determining a battery element voltage
    27.
    发明授权
    Method and system for determining a battery element voltage 有权
    用于确定电池元件电压的方法和系统

    公开(公告)号：US09213068B2

    公开(公告)日：2015-12-15

    申请号：US13803683

    申请日：2013-03-14

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrew C. Baughman ,  James C. Gibbs

    IPC: G01N27/416 ,  G01R31/36 ,  H01M10/48 ,  H01M10/42

    CPC classification number: G01R31/362 ,  H01M10/48 ,  H01M2010/4271 ,  H01M2220/20

    Abstract: A method for estimating the voltage of a battery element of a vehicle battery system is provided. The method comprises providing a balancing/sensing circuit having a series combination of a balancing switch and a balancing resistive element electrically connected in parallel with the battery element, and measuring the voltage across the combination of the balancing switch and balancing resistive element when the balancing switch is presumed to be in a “closed” state. The method further comprises deriving a compensated value for the measured voltage using empirically-derived data, wherein the compensated value compensates for a voltage drop occurring in the balancing/sensing circuit when the balancing switch is in the “closed” state and represents an estimate of the voltage of the battery element. A battery system is also provided that includes a battery element, a balancing/sensing circuit, a sensor, and a control module configured to perform the method described above.

    Abstract translation: 提供了一种用于估计车载电池系统的电池元件的电压的方法。 该方法包括提供平衡/感测电路，其具有与电池元件并联电连接的平衡开关和平衡电阻元件的串联组合，并且当平衡开关和平衡电阻元件的平衡开关 被认定处于“封闭”状态。 该方法还包括使用经验导出的数据导出测量电压的补偿值，其中当平衡开关处于“关闭”状态时，补偿值补偿在平衡/感测电路中发生的电压降，并且代表 电池元件的电压。 还提供一种电池系统，其包括电池元件，平衡/感测电路，传感器和被配置为执行上述方法的控制模块。

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