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公开(公告)号：US09515508B2
公开(公告)日：2016-12-06
申请号：US13804594
申请日：2013-03-14
Applicant: O2Micro Inc.
Inventor： Weidong Xue , Anquan Xiao , Xiaohu Tang , Xiaofei Gong
CPC classification number: H02J7/007 , H01M10/482 , H01M2010/4271 , H02J7/0014 , H02J7/0016 , H02J7/0018 , H02J2007/0037
Abstract: A battery management system includes detecting circuitry and control circuitry coupled to the detecting circuitry. The detecting circuitry detects cell voltages of battery cells of a battery pack. The control circuitry alternates between a normal state and a charging prohibition state. In the normal state, charging of the battery cells is enabled and the cell voltages increase, and if a voltage of a battery cell of the battery cells exceeds a predetermined overcharge threshold, then the control circuitry transitions to the charging prohibition state. In the charging prohibition state, charging of the battery cells is disabled, and the voltage of the battery cell decreases if at least one cell of the battery cells has a voltage less than a balance threshold. If the voltage of the battery cell falls to a predetermined overcharge-released threshold, then the control circuitry transitions to the normal state and enables charging of the battery cells.
Abstract translation: 电池管理系统包括耦合到检测电路的检测电路和控制电路。 检测电路检测电池组的电池单体的电池电压。 控制电路在正常状态和充电禁止状态之间交替。 在正常状态下，能够使电池单体充电，并且电池电压增加，并且如果电池单电池的电压超过预定的过充电阈值，则控制电路转换到充电禁止状态。 在充电禁止状态下，如果电池单元的至少一个电池具有小于平衡阈值的电压，则电池单元的充电被禁用，并且电池单元的电压降低。 如果电池单元的电压下降到预定的过充电阈值，则控制电路转换到正常状态并使电池单元能够充电。
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公开(公告)号：US09368981B2
公开(公告)日：2016-06-14
申请号：US14328355
申请日：2014-07-10
Applicant: O2Micro, Inc.
Inventor： Guoxing Li , Yan Li , Weidong Xue , Anquan Xiao
CPC classification number: H02J7/0016 , H02J7/007
Abstract: A battery module includes: a battery pack including multiple cells; control circuits corresponding to the cells, each control circuit including a control unit for managing the corresponding cell and a compensation unit for generating a corresponding compensation current such that the sum of the corresponding consumed current and the corresponding compensation current is equal to a target total current, where the control circuits include a first control circuit and a second control circuit, where the first control circuit includes a first control unit operating with a first consumed current, the second control circuit includes a second control unit operating with a second consumed current, and where the first control circuit conditionally generates a first compensation current and the second control circuit conditionally generates a second compensation current based on a comparison of the first consumed current and the second consumed current.
Abstract translation: 电池模块包括：包括多个电池的电池组; 每个控制电路包括用于管理相应单元的控制单元和用于产生相应的补偿电流的补偿单元，使得相应的消耗电流和相应的补偿电流之和等于目标总电流 ，其中所述控制电路包括第一控制电路和第二控制电路，其中所述第一控制电路包括以第一消耗电流工作的第一控制单元，所述第二控制电路包括以第二消耗电流操作的第二控制单元，以及 其中第一控制电路有条件地产生第一补偿电流，并且第二控制电路基于第一消耗电流和第二消耗电流的比较有条件地产生第二补偿电流。
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3.发明授权公开(公告)号：US12095047B2
公开(公告)日：2024-09-17
申请号：US18237840
申请日：2023-08-24
Applicant: O2Micro Inc.
Inventor： Yan Li , Weidong Xue
IPC: H01M10/42 , G01R19/165 , G01R31/3835 , G01R31/396 , H02J7/00 , H03K5/24
CPC classification number: H01M10/4264 , G01R19/16542 , G01R31/3835 , G01R31/396 , H02J7/0016 , H02J7/0019 , H03K5/24 , H01M2010/4271 , H01M2010/4278
Abstract: An open cell detection system includes a battery management system. The battery management system includes a control unit that transmits an open cell detection signal, to enable a balance unit for a first time period and to disable it for a second time period, and to enable an under-voltage comparison unit and an over-voltage comparison unit for a third time period. The under-voltage comparison unit compares a voltage with a first open cell threshold and outputs a first comparison result in the third time period. The over-voltage comparison unit compares a voltage with a second open cell threshold and outputs a second comparison result in the third time period. A judging unit determines whether a connection between a first battery unit and the battery management system is inoperative based on the first and second comparison results.
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Patent Agency Ranking
公开(公告)号：US09698611B2
公开(公告)日：2017-07-04
申请号：US15140257
申请日：2016-04-27
Applicant: O2Micro Inc.
Inventor： Guoxing Li , Yan Li , Weidong Xue , Anquan Xiao
CPC classification number: H02J7/0016 , H02J7/007
Abstract: A battery module includes: a battery pack including multiple cells; control circuits corresponding to the cells, each control circuit including a control unit for managing the corresponding cell and a compensation unit for generating a corresponding compensation current such that the sum of the corresponding consumed current and the corresponding compensation current is equal to a target total current, where the control circuits include a first control circuit and a second control circuit, where the first control circuit includes a first control unit operating with a first consumed current, the second control circuit includes a second control unit operating with a second consumed current, and where the first control circuit conditionally generates a first compensation current and the second control circuit conditionally generates a second compensation current based on a comparison of the first consumed current and the second consumed current.
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5.发明授权公开(公告)号：US11927642B2
公开(公告)日：2024-03-12
申请号：US17325048
申请日：2021-05-19
Applicant: O2Micro, Inc.
Inventor： Yingguo Zhang , Weidong Xue , Xiaojun Zeng
CPC classification number: G01R31/396 , G01R31/36 , H01M10/425 , H01M10/441 , H01M10/482 , H02J7/0019 , H02J7/0036 , H01M2010/4271 , H02J7/0016 , H02J7/0048
Abstract: An open cell detection method includes: (a) generating a control signal by a control unit, to turn on a first balance switch for a first time period; (b) generating the control signal with the control unit, to turn off the first balance switch for a second time period; (c) measuring a voltage value on a first capacitor, with a measure unit; (d) if the voltage value on the first capacitor is less than an open cell threshold, then determining with the control unit that the first cell has an open cell failure; (e) for each cell of the cells, repeating steps (a)-(d); and (f) if at least one cell of the cells has an open cell failure, then determining with the control unit that the battery management system has an open cell failure.
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公开(公告)号：US11469453B2
公开(公告)日：2022-10-11
申请号：US16881533
申请日：2020-05-22
Applicant: O2Micro Inc.
Inventor： Yan Li , Weidong Xue
IPC: H02J7/00 , H01M10/42 , G01R19/165 , G01R31/3835 , G01R31/396 , H03K5/24
Abstract: An open cell detection system includes a battery management system. The battery management system includes a control unit that transmits an open cell detection signal, to enable a balance unit for a first time period and to disable it for a second time period, and to enable an under-voltage comparison unit and an over-voltage comparison unit for a third time period. The under-voltage comparison unit compares a voltage with a first open cell threshold and outputs a first comparison result in the third time period. The over-voltage comparison unit compares a voltage with a second open cell threshold and outputs a second comparison result in the third time period. A judging unit determines whether a connection between a first battery unit and the battery management system is inoperative based on the first and second comparison results.
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公开(公告)号：US11777154B2
公开(公告)日：2023-10-03
申请号：US17940931
申请日：2022-09-08
Applicant: O2Micro Inc.
Inventor： Yan Li , Weidong Xue
IPC: H01M10/42 , G01R19/165 , G01R31/3835 , G01R31/396 , H02J7/00 , H03K5/24
CPC classification number: H01M10/4264 , G01R19/16542 , G01R31/3835 , G01R31/396 , H02J7/0016 , H02J7/0019 , H03K5/24 , H01M2010/4271 , H01M2010/4278
Abstract: An open cell detection system includes a battery management system. The battery management system includes a control unit that transmits an open cell detection signal, to enable a balance unit for a first time period and to disable it for a second time period, and to enable an under-voltage comparison unit and an over-voltage comparison unit for a third time period. The under-voltage comparison unit compares a voltage with a first open cell threshold and outputs a first comparison result in the third time period. The over-voltage comparison unit compares a voltage with a second open cell threshold and outputs a second comparison result in the third time period. A judging unit determines whether a connection between a first battery unit and the battery management system is inoperative based on the first and second comparison results.
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8.发明授权公开(公告)号：US11038356B2
公开(公告)日：2021-06-15
申请号：US15959064
申请日：2018-04-20
Applicant: O2Micro, Inc.
Inventor： Yingguo Zhang , Weidong Xue , Xiaojun Zeng
Abstract: An open cell detection method includes: (a) generating a control signal by a control unit, to turn on a first balance switch for a first time period; (b) generating the control signal with the control unit, to turn off the first balance switch for a second time period; (c) measuring a voltage value on a first capacitor, with a measure unit; (d) if the voltage value on the first capacitor is less than an open cell threshold, then determining with the control unit that the first cell has an open cell failure; (e) for each cell of the cells, repeating steps (a)-(d); and (f) if at least one cell of the cells has an open cell failure, then determining with the control unit that the battery management system has an open cell failure.
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