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    ACTIVE ISOLATION DETECTION USING ADAPTIVE BIAS RESISTANCE
    1.
    发明申请
    ACTIVE ISOLATION DETECTION USING ADAPTIVE BIAS RESISTANCE 有权

    公开(公告)号：US20210041505A1

    公开(公告)日：2021-02-11

    申请号：US16533180

    申请日：2019-08-06

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Yue Fan ,  Shifang Li ,  Russell K. Steele ,  James E. Tarchinski

    IPC: G01R31/36 ,  G01R31/364 ,  G01R31/385

    Abstract: An active isolation detection method may be used with an electrical system having a battery pack connected to a high-voltage bus. The bus has positive and negative bus rails, each having a respective rail-to-ground voltage. The method may include connecting variable resistance element to the high-voltage bus, and determining input information indicative electrical characteristics of the battery pack, the high-voltage bus, and/or a charging station. The method includes varying a bias resistance of the high-voltage bus, via control of the variable resistance element, e.g., via duty cycle control of a binary switch in series with a bias resistor, to produce a varied bias resistance based on the input information. A target voltage shift is achieved on the high-voltage bus as a target level of change in one of the rail-to-ground voltages. An isolation resistance of the electrical system is determined via the controller using the varied bias resistance.

    VEHICLE AND ELECTRICAL SYSTEM WITH DUAL BATTERY MODULES
    2.
    发明申请
    VEHICLE AND ELECTRICAL SYSTEM WITH DUAL BATTERY MODULES 审中-公开

    公开(公告)号：US20200055404A1

    公开(公告)日：2020-02-20

    申请号：US16102802

    申请日：2018-08-14

    Applicant: GM Global Technology Operations LLC

    Inventor： Brendan M. Conlon ,  Shifang Li ,  Kris Sevel ,  Russell K. Steele

    IPC: B60L11/18

    Abstract: An electrical system includes cables, a DC charge connector, first and second battery modules, a splice device, and a controller. Each battery module has first, second, third, and fourth electrical connectors receiving a respective one of the cables. The battery modules are connected to each other via the cables, and further have first, second, third, and fourth switches that connect battery cell strings to one or more connectors. The charge connector is connected to one of the cables between the first electrical connectors. The splice device connects the charge connector to the first connector of the first battery module and to a pair of the cables. A charging current may be split between the battery modules. The controller selectively establishes parallel charging, parallel drive, and separate drive and charging modes for each battery module. The system may have an independent drive mode.

    Intelligent vehicle systems and control logic for intrusive detection of high-voltage pathway failures
    3.
    发明授权
    Intelligent vehicle systems and control logic for intrusive detection of high-voltage pathway failures 有权

    公开(公告)号：US12263833B2

    公开(公告)日：2025-04-01

    申请号：US17713491

    申请日：2022-04-05

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Emil Francu ,  Russell K. Steele ,  Andrew M. Zettel ,  Rohit Singhal

    IPC: B60W20/50 ,  B60K6/40 ,  B60R16/023 ,  B60W50/02 ,  B60W50/038 ,  G07C5/08

    Abstract: A method of operating a motor vehicle includes a vehicle controller receiving, from a first feedback sensor of an HV component, a first feedback signal indicative of an electrical characteristic of the HV component, and then detecting an HV system fault if the first feedback signal is less than a predefined electrical threshold. Upon detecting the system fault, the controller commands the HV component to operate at a commanded set-point; after sending the command, the controller receives, from a second feedback sensor of the HV component, a second feedback signal indicative of an operating characteristic of the HV component. An HV pathway failure is detected if the second feedback signal is not equal to or within a predefined operating range of the commanded set-point. Upon detecting the pathway failure in an HV electrical pathway of the HV component, the vehicle controller transmits a command signal to take a remedial action.

    Dual inductive/conductive DC-coupled charging system
    4.
    发明授权
    Dual inductive/conductive DC-coupled charging system 有权

    公开(公告)号：US10124686B2

    公开(公告)日：2018-11-13

    申请号：US15211659

    申请日：2016-07-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrew J. Namou ,  Russell K. Steele ,  Douglas S. Cesiel

    IPC: H02J7/00 ,  B60L11/18

    Abstract: An electrical system connectable to an offboard power supply includes a battery pack, parallel DC-coupled conductive and inductive charging systems, and a controller. The controller initiates charging of the battery pack using analog low-voltage signals. A charging preference may prioritize charging via a designated one of the charging systems. Another electrical system includes a battery pack connected to a DC voltage bus, a charge coupler connectable to the offboard power supply to establish a plug-in charging connection, parallel DC-coupled conductive and inductive charging systems, and a controller. The controller commands charging using the analog low-voltage control signals, doing so via the conductive charging system when the charge coupler is plugged into the power supply and via the wireless charger when the charge coupler is not plugged into the power supply and the controller detects proximity of the system to the primary induction coil.

    Method and system for noise-tolerant RC response prediction
    7.
    发明授权
    Method and system for noise-tolerant RC response prediction 有权

    公开(公告)号：US10816606B2

    公开(公告)日：2020-10-27

    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 ,  B60L58/12 ,  G01R31/00 ,  G01R31/367 ,  B60L58/14 ,  H02J7/00 ,  H02P27/06

    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.

    DUAL INDUCTIVE/CONDUCTIVE DC-COUPLED CHARGING SYSTEM
    8.
    发明申请
    DUAL INDUCTIVE/CONDUCTIVE DC-COUPLED CHARGING SYSTEM 审中-公开

    公开(公告)号：US20180015833A1

    公开(公告)日：2018-01-18

    申请号：US15211659

    申请日：2016-07-15

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Andrew J. Namou ,  Russell K. Steele ,  Douglas S. Cesiel

    IPC: B60L11/18

    CPC classification number: B60L11/182 ,  B60L11/1811 ,  B60L11/1816 ,  B60L11/1833 ,  B60L11/1835 ,  B60L11/185 ,  B60L11/1864 ,  H02J7/00

    Abstract: An electrical system connectable to an offboard power supply includes a battery pack, parallel DC-coupled conductive and inductive charging systems, and a controller. The controller initiates charging of the battery pack using analog low-voltage signals. A charging preference may prioritize charging via a designated one of the charging systems. Another electrical system includes a battery pack connected to a DC voltage bus, a charge coupler connectable to the offboard power supply to establish a plug-in charging connection, parallel DC-coupled conductive and inductive charging systems, and a controller. The controller commands charging using the analog low-voltage control signals, doing so via the conductive charging system when the charge coupler is plugged into the power supply and via the wireless charger when the charge coupler is not plugged into the power supply and the controller detects proximity of the system to the primary induction coil.

    METHOD AND APPARATUS FOR CONTROLLING A DC/DC POWER CONVERTER
    9.
    发明申请
    METHOD AND APPARATUS FOR CONTROLLING A DC/DC POWER CONVERTER 有权

    公开(公告)号：US20170144553A1

    公开(公告)日：2017-05-25

    申请号：US14950066

    申请日：2015-11-24

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Russell K. Steele ,  James F. Crawford ,  Alexander Bilinski

    IPC: B60L11/18 ,  H02M3/04

    CPC classification number: B60L11/18 ,  B60L3/0046 ,  B60L3/0092 ,  B60L11/1868 ,  B60L2210/10 ,  B60L2240/547 ,  H02M3/04

    Abstract: A vehicle including a high-voltage electric battery assembly including first and second battery cell modules and DC/DC electric power converter assembly is described. The DC/DC electric power converter assembly selectively converts electric power from the first battery cell module and the second battery cell module. A second end of the DC/DC electric power converter is electrically connected to a low-voltage system. The low-voltage system includes a first subsystem configured to provide a critical vehicle operation. A controller includes algorithmic code executable to monitor the high-voltage battery assembly, including, upon detecting a fault in the first battery cell module of the high-voltage battery assembly, controlling the DC/DC electric power converter assembly to electrically convert electric power from the second battery cell module to low-voltage electric power that is transferred to the first subsystem.

    Battery electric system having switchable architecture with thermal runaway protection
    10.
    发明授权
    Battery electric system having switchable architecture with thermal runaway protection 有权

    公开(公告)号：US11685266B2

    公开(公告)日：2023-06-27

    申请号：US17463703

    申请日：2021-09-01

    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

    Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Robert J. Heydel ,  Russell K. Steele

    IPC: B60L50/60 ,  H02J7/00

    CPC classification number: B60L50/60 ,  H02J7/0013 ,  H02J7/0029 ,  H02J7/00032

    Abstract: A rechargeable energy storage system (RESS) includes a battery controller and battery modules, each respective module having battery cells, a cell sense board, and a semiconductor switch. The switch is connected in parallel with the cells within the respective module, and configured to conduct an electrical current during a thermal runaway propagation (TRP) event in which one or more cells is in an open-circuit state. This action bypasses the module and enables electrical components to be powered by the RESS during the TRP event. A battery electric system includes a direct current (“DC”) voltage bus, an electrical component connected thereto, the battery controller, and the RESS. A method for constructing the RESS includes connecting a respective semiconductor switch in parallel with the at least one battery cell of each respective one of the multiple battery modules, and electrically connecting the multiple battery modules together to construct the RESS.

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