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公开(公告)号：US11955821B2
公开(公告)日：2024-04-09
申请号：US18142525
申请日：2023-05-02
申请人： O2Micro, Inc.
发明人： Guoxing Li
CPC分类号： H02J7/0024 , H02J7/0013 , H02J7/36
摘要： In a portable device, a first battery has a positive terminal coupled to, through a first switch, an interface used to receive input power, and a negative terminal coupled to a reference terminal. A second battery has a positive terminal coupled to the interface, and a negative terminal coupled to the reference terminal through a second switch, and to the first battery's positive terminal through a third switch. A control circuitry controls the switches such that the device has multiple operation modes including at least a one-battery charging mode and a two-battery-in-series charging mode. In the one-battery charging mode, the circuitry turns off the third switch, and controls the other switches such that one battery is charged by the input power. In the two-battery-in-series charging mode, the control circuitry turns on the third switch and turns off the other switches, such that two batteries are charged by the input power.
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公开(公告)号：US20230402664A1
公开(公告)日：2023-12-14
申请号：US18237840
申请日：2023-08-24
申请人： O2Micro Inc.
发明人： Yan LI , Weidong XUE
IPC分类号： H01M10/42 , G01R19/165 , G01R31/3835 , G01R31/396 , H02J7/00 , H03K5/24
CPC分类号： H01M10/4264 , G01R19/16542 , G01R31/3835 , G01R31/396 , H02J7/0019 , H03K5/24 , H02J7/0016 , H01M2010/4278 , H01M2010/4271
摘要： 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：US11768245B2
公开(公告)日：2023-09-26
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
CPC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.
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公开(公告)号：US11677260B2
公开(公告)日：2023-06-13
申请号：US16597306
申请日：2019-10-09
申请人： O2Micro, Inc.
发明人： Guoxing Li
CPC分类号： H02J7/36 , H02J7/0013
摘要： In a portable device, a first battery has a positive terminal coupled to, through a first switch, an interface used to receive input power, and a negative terminal coupled to a reference terminal. A second battery has a positive terminal coupled to the interface, and a negative terminal coupled to the reference terminal through a second switch, and to the first battery's positive terminal through a third switch. A control circuitry controls the switches such that the device has multiple operation modes including at least a one-battery charging mode and a two-battery-in-series charging mode. In the one-battery charging mode, the circuitry turns off the third switch, and controls the other switches such that one battery is charged by the input power. In the two-battery-in-series charging mode, the control circuitry turns on the third switch and turns off the other switches, such that two batteries are charged by the input power.
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公开(公告)号：US11073565B2
公开(公告)日：2021-07-27
申请号：US16280828
申请日：2019-02-20
申请人： O2Micro, Inc.
发明人： Sterling Du , Yong Song , Yi Yuan , Ruobing Ren
IPC分类号： G01R31/3842 , G01R31/36
摘要： A method for calculating a remaining capacity of a battery includes: recording a sleep time of a battery monitor in sleep mode; reading an open circuit voltage measured and stored in sleep mode when the sleep time is greater than a preset time period and determining a first remaining capacity ratio based on the open circuit voltage; calculating charges consumed based on a preset current and the sleep time; calculating a second remaining capacity ratio based on charges consumed, a stored first remaining capacity value and a preset total capacity; reading values of battery parameters; determining a third remaining capacity ratio based on the values of battery parameters; and determining a current remaining capacity ratio based on the first remaining capacity ratio, the second remaining capacity ratio and the third remaining capacity ratio.
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公开(公告)号：US20210029788A1
公开(公告)日：2021-01-28
申请号：US16518316
申请日：2019-07-22
申请人： O2Micro, Inc.
发明人： Rong HU , Yung-Lin LIN , Hiroshi YAMAZAKI , Naoyuki FUJITA
摘要： A controller for controlling a light source module including a first LED array and a second LED array includes a power input terminal, a first power output terminal and a second power output terminal. The power input terminal is operable for receiving electric power from a power converter. The first power terminal is coupled to the first LED array, and the second power output terminal is coupled to the second LED array. The controller is operable for delivering the electric power to the first LED array via the first power output terminal in a first sequence of discrete time slots, and for delivering the electric power to the second LED array via the second power output terminal in a second sequence of discrete time slots. The first sequence of discrete time slots and the second sequence of discrete time slots are mutually exclusive.
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公开(公告)号：US10893591B2
公开(公告)日：2021-01-12
申请号：US16846092
申请日：2020-04-10
申请人： O2Micro, Inc.
发明人： Sheng-tai Lee , Kaiping Ran
IPC分类号： H05B45/34 , H05B45/345 , H05B45/10 , H05B45/24 , H05B45/395 , H05B45/00 , H05B45/14
摘要： A controller includes a voltage detection terminal, a current detection terminal and a voltage sensing terminal. The voltage detection terminal senses a second output voltage. The current detection terminal senses a current of a light source. The second output voltage is sensed prior to the current of the light source. The voltage sensing terminal receives a voltage sensing signal indicative of a first output voltage. The controller adjusts the voltage sensing signal based on the second output voltage, to enable the second output voltage in a preset voltage range; when the second output voltage is in the preset voltage range, the controller adjusts the adjusted voltage sensing signal based on a difference between the current of the light source and a target current value, to enable the current of the light source to maintain the target current value.
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公开(公告)号：US10534037B2
公开(公告)日：2020-01-14
申请号：US15939091
申请日：2018-03-28
申请人： O2Micro Inc.
发明人： Yi Yuan , Yingguo Zhang , Zhibin Hua , Hua-Yi Wang , Ping Liu
IPC分类号： G01R31/36 , G01R31/382 , G06F17/00 , G01R19/165 , G01R31/3842
摘要： A device includes an interface and a processor. The interface receives information for a parameter indicative of a status of a battery. The processor calculates a remaining capacity of the battery, calculates a capacity ratio of the calculated remaining capacity to a capacity reference of the battery, compares the parameter with a parameter reference to generate a first comparison result, compares the capacity ratio with a ratio reference to generate a second comparison result, sets an amount according to the first and second comparison results, and changes the calculated remaining capacity by the amount.
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公开(公告)号：US10277052B2
公开(公告)日：2019-04-30
申请号：US15823011
申请日：2017-11-27
申请人： O2Micro Inc.
发明人： Guoxing Li
摘要： A controller for controlling power delivery to a battery includes a first terminal that provides a first signal to enable a bypass path to deliver power from an interface to charge the battery, and includes a second terminal that provides a second signal to enable a conversion circuit to convert input power received at the interface to output power to charge the battery. The controller also includes circuitry that determines whether a first adapter or a second adapter is connected to the interface, generates the second signal if the second adapter is connected to the interface, generates the first signal and a request if the first adapter is connected to the interface, and provides the request to the first adapter through the interface. The request includes information indicative of a target level and an instruction that causes the first adapter to provide power at the target level to the interface.
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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
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.
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