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Patent Agency Ranking
1.发明授权公开(公告)号：US10978891B2
公开(公告)日：2021-04-13
申请号：US16006449
申请日：2018-06-12
Applicant: Motorola Solutions, Inc.
Inventor： Robert L. Snyder , Donald L. Flowers
IPC: H02J7/00
Abstract: 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.
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2.发明授权公开(公告)号：US11362536B2
公开(公告)日：2022-06-14
申请号：US16454280
申请日：2019-06-27
Applicant: Motorola Solutions, Inc.
Inventor： Robert L. Snyder , Donald L. Flowers
Abstract: 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.
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公开(公告)号：US10992146B2
公开(公告)日：2021-04-27
申请号：US16229632
申请日：2018-12-21
Applicant: Motorola Solutions, Inc.
Inventor： Donald L. Flowers , Ryan Baker , Robert L. Snyder
IPC: H02J7/00 , H01M2/10 , H01M10/48 , G01R19/165
Abstract: 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.
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公开(公告)号：US10103556B2
公开(公告)日：2018-10-16
申请号：US14944002
申请日：2015-11-17
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Robert L. Snyder , Muhamad Ridzuan Bin Azizan , Roger L. Boyer , Donald L. Flowers
Abstract: Methods and apparatus for a protection circuit for a battery and a battery connected device during charging are provided. In one embodiment, the apparatus includes a load-blocking switch connected between a rechargeable battery and an electronic device and a charge-blocking switch connected between the rechargeable battery and a charger. The apparatus also includes a safety circuit to detect a voltage across and the current flowing through the rechargeable battery. The safety circuit opens the load-blocking switch and the charge-blocking switch when it detects that the voltage across or the current flowing through the battery exceeds a predetermined threshold.
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公开(公告)号：US20170141592A1
公开(公告)日：2017-05-18
申请号：US14944002
申请日：2015-11-17
Applicant: MOTOROLA SOLUTIONS, INC.
Inventor： Robert L. Snyder , Muhamad Ridzuan Bin Azizan , Roger L. Boyer , Donald L. Flowers
CPC classification number: H02J7/0031 , H02H3/08 , H02H3/087 , H02H3/20 , H02H3/202 , H02H7/18 , H02J7/0042 , H02J2007/0037 , H02J2007/0039
Abstract: Methods and apparatus for a protection circuit for a battery and a battery connected device during charging are provided. In one embodiment, the apparatus includes a load-blocking switch connected between a rechargeable battery and an electronic device and a charge-blocking switch connected between the rechargeable battery and a charger. The apparatus also includes a safety circuit to detect a voltage across and the current flowing through the rechargeable battery. The safety circuit opens the load-blocking switch and the charge-blocking switch when it detects that the voltage across or the current flowing through the battery exceeds a predetermined threshold.
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