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公开(公告)号：US20220120796A1
公开(公告)日：2022-04-21
申请号：US17566715
申请日：2021-12-31
IPC分类号： G01R27/14
摘要： The present application discloses a circuit and a method for detecting insulation resistance. The circuit includes: a first voltage dividing module, a second voltage dividing module, a third voltage dividing module, a fourth voltage dividing module, a first switch module, a fifth voltage dividing module, a second switch module, a third switch module, and a detecting module, where the first voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit, and the third voltage dividing module comprises a third voltage dividing unit and a fourth voltage dividing unit. According to the embodiments of the present application, errors caused by fluctuations in the pull-up of the reference power supply can be avoided, and the accuracy of the circuit for detecting insulation resistance can be effectively improved.
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公开(公告)号：US11048316B2
公开(公告)日：2021-06-29
申请号：US16357552
申请日：2019-03-19
发明人： Yuqun Zeng , Kai Wu , Le Chu , Jianwei Zhuo , Qiandeng Li
IPC分类号： G06F1/3225 , G06F1/26 , G06F1/30 , G06F1/3234
摘要： The present application provides a power-down detection circuit and a control method. A low-voltage side power supply is connected to provide an output voltage of the low-voltage side power supply to a power-down detection sub-circuit and provide a standard supply voltage to the power-down detection sub-circuit, a controller and a memory via a voltage conversion circuit. The power-down detection sub-circuit is configured to obtain the output voltage of the low-voltage side power supply, and determine, according to the output voltage of the low-voltage side power supply, whether a power-down event occurs in the low-voltage side power supply. If it is determined that a power-down event occurs, a power-down signal is sent to the controller. The controller receives the power-down signal, and controls the memory to record current information of a high voltage bus sensed by a high-voltage side current sensor.
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公开(公告)号：US11656672B2
公开(公告)日：2023-05-23
申请号：US17315260
申请日：2021-05-07
发明人： Yuqun Zeng , Kai Wu , Le Chu , Jianwei Zhuo , Qiandeng Li
IPC分类号： G06F1/26 , G06F1/30 , G06F1/32 , G06F1/3225 , G06F1/3234
CPC分类号： G06F1/3225 , G06F1/263 , G06F1/30 , G06F1/3275
摘要： The present application provides a method for controlling a power-down detection circuit, a controller and a computer readable storage medium. The method includes: receiving, by a controller of a power-down detection circuit, a power-down signal, wherein the power-down signal is sent from a power-down detection sub-circuit of the power-down detection circuit when it is determined by the power-down detection sub-circuit that an output voltage of a low-voltage side power supply of the power-down detection circuit is smaller than a threshold, and wherein the power-down detection sub-circuit and the controller are powered by the low-voltage side power supply; controlling, by the controller, a memory of the power-down detection circuit to record fault information, wherein the fault information comprises current information of a high voltage bus sensed by a high-voltage side current sensor of the power-down detection circuit; and performing, by the controller, a fault diagnosis based on the fault information.
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公开(公告)号：US11258278B2
公开(公告)日：2022-02-22
申请号：US16799729
申请日：2020-02-24
发明人： Jianwei Zhuo , Le Chu , Jirong Huo , Yanhui Fu , Qiandeng Li
IPC分类号： H02J7/00 , G01R19/165
摘要： The present disclosure discloses a detection circuit and method. The detection circuit comprises: a controller, a battery pack, a main positive switch module, a main negative switch module and at least one detection loop. The controller collects voltages of a positive electrode and a negative electrode of the battery pack and a voltage between external sides of the main positive switch module and the main negative switch module when turning on the main positive or negative switch module and after turning on any detection loop, and obtains resistance values of insulation resistors of the external sides according to resistance values of insulation resistors of internal sides of the main positive and negative switch module, as well as the voltages of the positive electrode and the negative electrode and the voltage between the external sides of the main positive switch module and the main negative switch module, which are collected twice.
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公开(公告)号：US11085960B2
公开(公告)日：2021-08-10
申请号：US16364390
申请日：2019-03-26
发明人： Le Chu , Qiandeng Li , Yanhui Fu , Qidong Lou
IPC分类号： G01R31/50 , G01R31/14 , G01R31/389 , G01R31/3835 , G01R27/14
摘要： An insulation detection method includes: a first and second equivalent resistances are calculated; the less one of the first and second equivalent resistances is taken as a first insulation resistance, which is an insulation resistance of the high voltage circuit on the side where the battery pack locates relative to the reference potential terminal; when the first insulation resistance is normal, the switch unit is closed, and a second insulation resistance is calculated according to the first and second equivalent resistances, voltages of a first and second sampling point when the switch unit is closed; the second insulation resistance is an insulation resistance of the high voltage circuit on the side where the load locates relative to the reference potential terminal; the insulation state of the high voltage circuit on the side where the load locates is determined according to the second insulation resistance.
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公开(公告)号：US11733279B2
公开(公告)日：2023-08-22
申请号：US17566715
申请日：2021-12-31
IPC分类号： G01R27/14
CPC分类号： G01R27/14
摘要： The present application discloses a circuit and a method for detecting insulation resistance. The circuit includes: a first voltage dividing module, a second voltage dividing module, a third voltage dividing module, a fourth voltage dividing module, a first switch module, a fifth voltage dividing module, a second switch module, a third switch module, and a detecting module, where the first voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit, and the third voltage dividing module comprises a third voltage dividing unit and a fourth voltage dividing unit. According to the embodiments of the present application, errors caused by fluctuations in the pull-up of the reference power supply can be avoided, and the accuracy of the circuit for detecting insulation resistance can be effectively improved.
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公开(公告)号：US11448683B2
公开(公告)日：2022-09-20
申请号：US17051447
申请日：2020-01-15
发明人： Baohai Du , Le Chu , Jiayu Yu , Qiandeng Li
IPC分类号： G01R31/00 , G01R31/14 , G01R31/389 , G01R31/396 , G01R31/3842 , G01R27/02 , G01R31/36 , H01M10/42 , H01M10/48
摘要： A circuit includes: an isolation power module, a first and second sampling modules, a first and second sampling points, a processor. A first terminal of the first sampling module is connected to a positive electrode of a battery pack and first terminal of a positive switch module, a second terminal of the first sampling module is connected to a negative electrode of the battery pack and a first terminal of the negative switch module, a third terminal of the first sampling module is connected to a first reference voltage end; a first terminal of the second sampling module is connected to a second terminal of the positive switch module and a positive electrode of the isolation power module, a second terminal of the second sampling module is connected to a second terminal of the negative switch module and a negative electrode of the isolation power module.
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公开(公告)号：US10983154B2
公开(公告)日：2021-04-20
申请号：US16519127
申请日：2019-07-23
发明人： Yuqun Zeng , Kai Wu , Jirong Huo , Le Chu , Yanhui Fu , Qiandeng Li
摘要： Disclosed are a load state detection circuit and method. A microcontroller is connected to a switch unit which is connected between a detecting power supply and a load to be tested. A voltage sampling point is formed at either terminal of the load to be tested, and the voltage sampling circuit is connected between the voltage sampling point and the microcontroller. The voltage sampling circuit is configured to sample a voltage at the voltage sampling point. The microcontroller is configured to connect the load to be tested and the detecting power supply by controlling the switch unit, and determine whether a fault exists in the load to be tested according to a received voltage at the voltage sampling point sampled by the voltage sampling circuit, before connecting the load to be tested with the drive power supply.
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9.发明授权公开(公告)号：US11650261B2
公开(公告)日：2023-05-16
申请号：US17562079
申请日：2021-12-27
发明人： Fangjie Zhou , Yizhen Hou , Xiyang Zuo , Qiandeng Li , Le Chu
IPC分类号： G01R31/389 , G01N27/02 , G01R31/392
CPC分类号： G01R31/389 , G01N27/026 , G01R31/392
摘要： Embodiments of the present application provide a detection apparatus of electrochemical impedance spectroscopy and a battery management system, the detection apparatus including a waveform generator, where the waveform generator is integrated in a battery monitoring chip; an excitation resistor; a detection resistor; and an MOS switch, wherein the waveform generator is configured to generate a pulse waveform, a gate electrode of the MOS switch is configured to receive the pulse waveform; the excitation resistor is configured to enable the battery to generate an excitation current when the gate electrode of the MOS switch receives the pulse waveform; the detection resistor is configured to convert the excitation current into an excitation voltage, the excitation voltage is configured to calculate an electrochemical impedance of the battery, The detection apparatus of electrochemical impedance spectroscopy in embodiments of the present application can lower cost and volume of EIS detection.
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公开(公告)号：US11150302B2
公开(公告)日：2021-10-19
申请号：US16658081
申请日：2019-10-19
发明人： Jirong Huo , Yanhui Fu , Le Chu , Qiandeng Li
摘要： The present application provides a high voltage detection circuit and method. The high voltage detection circuit includes a current adjustment module configured to be turned on or off to adjust a current in a high voltage circuit, a first detection module configured to provide a detection signal and transmit the detection signal to a processor module and the processor module configured to determine whether a master positive switch or a master negative switch is in malfunction according to a desired operation state of the master positive switch, a desired operation state of the master negative switch and the detection signal.
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