公开(公告)号：US20200072896A1

公开(公告)日：2020-03-05

申请号：US16364390

申请日：2019-03-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Le CHU ,  Qiandeng LI ,  Yanhui FU ,  Qidong LOU

IPC: G01R31/14 ,  G01R31/02 ,  G01R31/389 ,  G01R31/3835 ,  G01R27/14

Abstract: Disclosed is an insulation detection method that 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.

公开(公告)号：US20220229112A1

公开(公告)日：2022-07-21

申请号：US17585326

申请日：2022-01-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yanhui FU ,  Le CHU ,  Changjian LIU

IPC: G01R31/327 ,  G01R31/52 ,  G01R31/00 ,  G05B23/02

Abstract: This application relates to the technical field of electronics, and discloses a detection circuit and a detection method of an electrical control device, and an electric vehicle. In some embodiments of this application, the detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module and a low-side switch unit. The detection circuit includes: a first detection module, a second detection module, and a control module. The control module is configured to obtain an electrical signal at a third end of the first detection module, and/or an electrical signal at a second end of the second detection module; and determine, based on the electrical signal at the third end of the first detection module, and/or the electrical signal at the second end of the second detection module, whether the drive circuit of the electrical control device is faulty.

公开(公告)号：US20200274374A1

公开(公告)日：2020-08-27

申请号：US16799729

申请日：2020-02-24

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jianwei ZHUO ,  Le CHU ,  Jirong HUO ,  Yanhui FU ,  Qiandeng LI

IPC: H02J7/00

Abstract: 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.

公开(公告)号：US20200271726A1

公开(公告)日：2020-08-27

申请号：US16658081

申请日：2019-10-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jirong HUO ,  Yanhui FU ,  Le CHU ,  Qiandeng Li

IPC: G01R31/36

Abstract: The present application provides a high voltage detection circuit and method. The high voltage detection circuit include: 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; the processor module configured to determine whether a positive switch unit or a negative switch unit is in malfunction according to a desired operation state of the positive switch unit, a desired operation state of the negative switch unit and the detection signal.

公开(公告)号：US20210231726A1

公开(公告)日：2021-07-29

申请号：US17051447

申请日：2020-01-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Baohai DU ,  Le CHU ,  Jiayu YU ,  Qiandeng LI

IPC: G01R31/14 ,  G01R31/389 ,  G01R31/396 ,  G01R31/36 ,  G01R31/3842 ,  G01R27/02 ,  H01M10/48 ,  H01M10/42

Abstract: A circuit includes: an isolation power module, a first sampling module, a first sampling point, a second sampling module, a second sampling point, 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.

公开(公告)号：US20210199706A1

公开(公告)日：2021-07-01

申请号：US17204260

申请日：2021-03-17

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuqun ZENG ,  Kai WU ,  Jirong HUO ,  Le CHU ,  Yanhui FU ,  Qiandeng LI

IPC: G01R31/00 ,  H02H1/00

Abstract: 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.

公开(公告)号：US20200089304A1

公开(公告)日：2020-03-19

申请号：US16357552

申请日：2019-03-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Kai WU ,  Le CHU ,  Jianwei ZHUO ,  Qiandeng LI

IPC: G06F1/3225 ,  G06F1/30 ,  G06F1/26 ,  G06F1/3234

Abstract: 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.

公开(公告)号：US20230139265A1

公开(公告)日：2023-05-04

申请号：US17940762

申请日：2022-09-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Hui CHEN ,  Yanhui FU ,  Le CHU ,  Maobo GUO

IPC: H02J7/00 ,  H02H9/04

Abstract: A discharge circuit includes a first branch configured to be connected to a protected unit and a second branch connected in parallel to the first branch. The first branch includes a first overvoltage protection device configured to passively discharge a surge voltage. The second branch includes a second overvoltage protection device and a control switch connected in series. The control switch is configured to be connected to a control unit, and to be opened or closed based on a control signal of the control unit.

公开(公告)号：US20230064240A1

公开(公告)日：2023-03-02

申请号：US17562079

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Fangjie ZHOU ,  Yizhen HOU ,  Xiyang ZUO ,  Qiandeng LI ,  Le CHU

IPC: G01R31/389 ,  G01R31/392 ,  G01N27/02

Abstract: 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.

公开(公告)号：US20220255546A1

公开(公告)日：2022-08-11

申请号：US17732569

申请日：2022-04-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jirong HUO ,  Yanhui FU ,  Changjian LIU ,  Le CHU

IPC: H03K17/28 ,  B60L58/10

Abstract: Embodiments of this application relate to the field of electricity, and disclose a drive circuit. In some embodiments of this application, the drive circuit includes a high-side driver module and a delay module, the delay module is configured to output a delay signal of preset duration to the high-side driver module in a case that a control module is being reset; and the high-side driver module is configured to: according to the delay signal of preset duration, remain in a first state within the preset duration, the first state being the same as a second state; where the second state is a working state of the high-side driver module before the control module is reset, and the second state includes being on or off.