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9 条记录 (耗时 0.018 秒)

    Methods and apparatus for extending discharge over-current trip time in a battery protection circuit
    1.
    发明授权
    Methods and apparatus for extending discharge over-current trip time in a battery protection circuit 有权

    公开(公告)号：US10978891B2

    公开(公告)日：2021-04-13

    申请号：US16006449

    申请日：2018-06-12

    申请人： Motorola Solutions, Inc.

    发明人： Robert L. Snyder ,  Donald L. Flowers

    IPC分类号： H02J7/00

    摘要： Methods and apparatus for extending discharge over-current trip time in a battery protection circuit are disclosed. The protection circuit includes a safety circuit that asserts a first discharge over-current indicator when the discharge current of the battery exceeds a first discharge over-current threshold corresponding to a sustained over-current limit, a delay circuit that applies an added delay to the assertion of the first discharge over-current indicator, and a short circuit detection circuit that asserts a second discharge over-current indicator, with no delay added, when the discharge current exceeds a second discharge over-current threshold corresponding to a cell-specific peak output current limit. The battery protection circuit includes a logic circuit configured to assert a discharge over-current control signal to disable the battery responsive to assertion of the first discharge over-current indicator or the second discharge over-current indicator.

    Methods and apparatus for detecting open circuit faults in a battery pack containing parallel cells
    5.
    发明授权
    Methods and apparatus for detecting open circuit faults in a battery pack containing parallel cells 有权

    公开(公告)号：US11362536B2

    公开(公告)日：2022-06-14

    申请号：US16454280

    申请日：2019-06-27

    申请人： Motorola Solutions, Inc.

    发明人： Robert L. Snyder ,  Donald L. Flowers

    IPC分类号： H02J7/00 ,  H02J7/04 ,  G01R31/36 ,  H01M10/48 ,  H01M10/44

    摘要： Methods and apparatus for detecting open circuit fault conditions in a battery pack containing parallel cells include providing a first control signal to a close FET in parallel with a resistive element, the resistive element being in series with a first battery cell in a first cell path between the terminals of the battery pack, the first cell path being in parallel with a second cell path including a second battery cell. While the FET is closed, a test load is applied across the terminals and a first voltage measurement is obtained at a test point in the battery pack. The methods include providing a second control signal to open the FET, applying the test load across the terminals, obtaining a second voltage measurement at the test point, and determining whether a difference between the first and second voltage measurements indicates an open circuit fault condition in the battery pack.

    Methods and apparatus for controlling charge current in a battery pack containing cells of disparate types
    6.
    发明授权
    Methods and apparatus for controlling charge current in a battery pack containing cells of disparate types 有权

    公开(公告)号：US10992146B2

    公开(公告)日：2021-04-27

    申请号：US16229632

    申请日：2018-12-21

    申请人： Motorola Solutions, Inc.

    发明人： Donald L. Flowers ,  Ryan Baker ,  Robert L. Snyder

    IPC分类号： H02J7/00 ,  H01M2/10 ,  H01M10/48 ,  G01R19/165

    摘要： Methods and apparatus for controlling charge current in a battery pack containing cells of disparate types are disclosed. The methods include receiving a charge current for charging a battery pack that includes one or more battery cells of a first cell type, and one or more battery cells of a second cell type. Each battery cell of the first cell type has a first impedance and a first charge current limit. Each battery cell of the second cell type has a second impedance greater than the first impedance and a second charge current limit greater than the first charge current limit. The methods include reducing, by a respective current control circuit associated with each battery cell of the first cell type, the amount of the received charge current through the battery cell of the first cell type to an amount less than the first charge current limit.

    Method and apparatus for a multiplexed contact between electrical devices
    9.
    发明授权
    Method and apparatus for a multiplexed contact between electrical devices 有权
    用于电气设备之间多路复用接触的方法和装置

    公开(公告)号：US09368993B2

    公开(公告)日：2016-06-14

    申请号：US13782090

    申请日：2013-03-01

    申请人： Motorola Solutions, Inc.

    发明人： Viranga L. Wijeratne ,  Donald L. Flowers ,  John E. Herrmann ,  Bradley E. Long ,  Frederick J. Weissinger

    IPC分类号： H02J7/00 ,  H01H47/00 ,  H01M10/46 ,  H01M10/42 ,  H01M10/44

    CPC分类号： H02J7/007 ,  H01M10/425 ,  H01M10/4257 ,  H01M10/44 ,  H01M10/443 ,  H01M10/46 ,  H01M2010/4271 ,  H01M2010/4278 ,  H02J7/0042 ,  Y10T307/858

    摘要： A method and apparatus for multiplexing an electrical contact interface between two electrical devices uses a time differentiated enablement of two or more different circuit elements in a first electrical device that are accessed via the multiplexed contact by a second electrical device. A timing control circuit in the first electrical device enables and disables circuit elements in the first electrical device coupled to a shared information contact over time. The second electrical device interacts with a first circuit element during an initial period upon connection to the first electrical device, and then interacts with a second circuit element after the initial period.

    摘要翻译： 用于复用两个电气设备之间的电接触界面的方法和设备使用通过第二电气设备经由多路复用接点访问的第一电气设备中的两个或多个不同电路元件的时间差分启用。 第一电气设备中的定时控制电路启用和禁用随时间耦合到共享信息联系的第一电气设备中的电路元件。 第二电气设备在连接到第一电气设备时的初始时段期间与第一电路元件相互作用，然后在初始周期之后与第二电路元件相互作用。