公开(公告)号：US20180275704A1

公开(公告)日：2018-09-27

申请号：US15467807

申请日：2017-03-23

申请人： O2Micro Inc.

发明人： Guoxing LI ,  Quanwang LIU

IPC分类号： G05F1/59 ,  G05F1/567 ,  G05F1/573

CPC分类号： G05F1/59 ,  G05F1/567 ,  G05F1/573

摘要： A dual input power management method includes: monitoring whether a first input terminal has a power supply and whether a second input terminal has a power supply, and accordingly generating a first monitor signal and a second monitor signal; generating a priority signal based on the first monitor signal, the second monitor signal, and an enable signal, to determine an input priority of the first input terminal and the second input terminal; generating a control signal based on a feedback signal indicative of an output voltage and a reference signal; and regulating the output voltage based on the priority signal and the control signal.

公开(公告)号：US20150015209A1

公开(公告)日：2015-01-15

申请号：US14328355

申请日：2014-07-10

申请人： O2Micro, Inc.

发明人： Guoxing LI ,  Yan LI ,  Weidong XUE ,  Anquan XIAO

IPC分类号： H02J7/00

CPC分类号： H02J7/0016 ,  H02J7/007

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20220120819A1

公开(公告)日：2022-04-21

申请号：US17368637

申请日：2021-07-06

申请人： O2Micro, Inc.

发明人： Yan LI ,  Hui LIU ,  Guoxing LI

IPC分类号： G01R31/3835

摘要： A controller for detecting voltages of battery cells in a battery pack includes converters coupled to the battery cells and switching units. An anode of each battery cell is coupled to a respective converter through a respective first path, and a cathode of each battery cell is coupled to the respective converter through a respective second path. The switching units are coupled between the battery cells and the converters. The converters are coupled to anodes of the battery cells through the switching units. When a switching unit corresponding to a battery cell is turned on, an anode of the battery cell provides an operating current and a sampling current through a respective first path to a respective converter, and the operating current flows from the anode of the battery cell through the respective converter to ground.

公开(公告)号：US20210349150A1

公开(公告)日：2021-11-11

申请号：US17382213

申请日：2021-07-21

申请人： O2Micro, Inc.

发明人： Guoxing LI

IPC分类号： G01R31/367 ,  G01R31/374 ,  G01R31/3842

摘要： In a status detection system, a data acquisition circuit monitors statuses of a battery to generate status data. A storage medium stores a set of lookup tables. A lookup table of the lookup tables includes a set of datasets corresponding to a set of time frames. Each dataset includes digital values of parameters of the battery obtained in a corresponding time frame of the time frames. A controller receives the status data and updates the lookup tables based on the status data. The controller also obtains a current dataset of the parameters based on the status data, searches the lookup table for a previous dataset that matches the current dataset, compares a current value of a parameter in the current dataset with a previous value of the parameter in the previous dataset, and determines whether a potential fault is present in the battery based on a result of the comparison.

公开(公告)号：US20210199722A1

公开(公告)日：2021-07-01

申请号：US17204759

申请日：2021-03-17

申请人： O2Micro Inc.

发明人： Guoxing LI ,  Xiaojun ZENG ,  Yingguo ZHANG

IPC分类号： G01R31/36 ,  H02J7/00 ,  G01R31/385

摘要： A method for detecting whether a battery management system is abnormal includes: calculating a value of a theoretical time constant corresponding to a first cell; determining a preset range of the theoretical time constant; controlling a first switch to turn off for a first time period, turn on for a second time period, turn off for a third time period; measuring a voltage on a first capacitor at end of first time period, to produce a measured voltage of first cell; measuring voltages on first capacitor at least at one time point in third time period, to produce measured capacitance voltages; determining a value of a measured time constant according to at least one of measured capacitance voltages and the measured voltage of first cell; and determining the battery management system is abnormal, if the value of the measured time constant exceeds the preset range of the theoretical time constant.

公开(公告)号：US20160241055A1

公开(公告)日：2016-08-18

申请号：US15140257

申请日：2016-04-27

申请人： O2Micro Inc.

发明人： Guoxing LI ,  Yan LI ,  Weidong XUE ,  Anquan XIAO

IPC分类号： H02J7/00

CPC分类号： H02J7/0016 ,  H02J7/007

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20210270906A1

公开(公告)日：2021-09-02

申请号：US17182087

申请日：2021-02-22

申请人： O2Micro, Inc.

发明人： Chih-Chung CHOU ,  Guoxing LI ,  Hua-Yi WANG ,  Fu-Jen HSIEH ,  Lian CHEN

IPC分类号： G01R31/3842 ,  H02J7/00 ,  G01R31/367

摘要： In a battery management controller, analog-to-digital conversion circuitry converts analog signals, indicative of a battery voltage, a battery current, and a battery temperature, to digital signals. A memory stores a remaining-capacity lookup table that includes multiple groups of data. Each group of data includes a voltage, a current, a temperature, and a parameter associated with a remaining capacity corresponding to the voltage, the current and the temperature. A processor searches the lookup table for a current parameter value and an end-of-discharge parameter value based on the digital signals, and determines a full available charge capacity of the battery based on the current parameter value and the end-of-discharge parameter value. The processor also counts the number of charges flowing through the battery based on a battery current. The processor further determines an available state of charge of the battery according to the full available charge capacity and the number of charges.

公开(公告)号：US20190280341A1

公开(公告)日：2019-09-12

申请号：US16279739

申请日：2019-02-19

申请人： O2Micro, Inc.

发明人： Guoxing LI

IPC分类号： H01M10/42 ,  H01M10/48 ,  G01R31/382 ,  G01R31/36

摘要： In a protection circuit, a decision circuit generates a configuration signal indicative of an application requirement associated with a battery pack, generates an indication signal indicative of the battery pack's status, sets the indication signal to a first state if an abnormal condition is detected, and sets the indication signal to a second state if the battery pack is in a normal condition. A control circuit receives a supply signal indicative of a voltage at an input terminal of a switch, provides a protection signal to a control terminal of the switch to control the switch, and sets the protection signal to a first level or a second level according to the indication and configuration signals. The first level is equal to a level of the supply signal, and the second level is equal to the supply signal minus a predetermined voltage reference.

公开(公告)号：US20190326746A1

公开(公告)日：2019-10-24

申请号：US16365395

申请日：2019-03-26

申请人： O2Micro, Inc.

发明人： Guoxing LI

IPC分类号： H02H7/18 ,  G01R31/3835 ,  H01M10/48 ,  G01R31/364

摘要： A system includes multiple protection modules. Each protection module includes monitoring terminals that monitor battery cells' status, an output terminal that outputs a protection signal if an abnormal condition in the cells is detected, a switching terminal that receives a switching signal, and detection circuitry that switches from a normal-working mode to a fast-test mode if receiving the switching signal, delays outputting the protection signal for a first time interval if the abnormal condition is detected in the normal-working mode, and delays outputting the protection signal for a second time interval, less than the first time interval, if the abnormal condition is detected in the fast-test mode. In the protection modules, the switching terminal of a first protection module and a monitoring terminal of the first protection module are coupled to a second protection module and receive a protection signal from the output terminal of the second protection module.

公开(公告)号：US20190312444A1

公开(公告)日：2019-10-10

申请号：US16360538

申请日：2019-03-21

申请人： O2Micro, Inc.

发明人： Guoxing LI

IPC分类号： H02J7/00

摘要： A balance circuit for a set of battery cells includes a set of switch circuits and control circuitry coupled to the switch circuits. Each switch circuit of the switch circuits is coupled to a corresponding battery cell of the battery cells, and enables a bypass current to flow out a positive terminal of the corresponding battery cell if the switch circuit is turned on. The switch circuit includes a first switch having a first diode and a second switch having a second diode reversely coupled to the first diode. The second switch disables the bypass current if the second switch is turned off The control circuitry balances the battery cells by controlling the switch circuits.