公开(公告)号：US11448683B2

公开(公告)日：2022-09-20

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: G01R31/00 ,  G01R31/14 ,  G01R31/389 ,  G01R31/396 ,  G01R31/3842 ,  G01R27/02 ,  G01R31/36 ,  H01M10/42 ,  H01M10/48

Abstract: 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.

公开(公告)号：US10983154B2

公开(公告)日：2021-04-20

申请号：US16519127

申请日：2019-07-23

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuqun Zeng ,  Kai Wu ,  Jirong Huo ,  Le Chu ,  Yanhui Fu ,  Qiandeng Li

IPC: G01R31/00 ,  H02H1/00 ,  H02H3/16

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：US11650261B2

公开(公告)日：2023-05-16

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 ,  G01N27/02 ,  G01R31/392

CPC classification number: G01R31/389 ,  G01N27/026 ,  G01R31/392

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：US11150302B2

公开(公告)日：2021-10-19

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: G01R31/00 ,  G01R31/36

Abstract: 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.

公开(公告)号：US20210263580A1

公开(公告)日：2021-08-26

申请号：US17315260

申请日：2021-05-07

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Kai Wu ,  Le Chu ,  Jianwei Zhuo ,  Qiandeng Li

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

Abstract: 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.

公开(公告)号：US20210104781A1

公开(公告)日：2021-04-08

申请号：US17123017

申请日：2020-12-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO.,LIMITED

Inventor： Yanhui Fu ,  Le Chu ,  Zhongliang Guo ,  Qiandeng Li

IPC: H01M10/42 ,  H02J7/00 ,  H01M50/204 ,  H01M50/249 ,  H01M10/48

Abstract: This application relate to a rechargeable battery monitoring system, a battery pack, and an electric vehicle. A rechargeable battery includes battery units and an MSD switch. The battery units are serially-connected, and the MSD switch is connected between adjacent battery units. The monitoring system includes a BMU and an equal number of CMCs that have one-to-one correspondence with the battery units. The CMCs are divided into CMC groups that meet preset conditions. The monitoring system further includes an equal number of daisy chain buses that are in one-to-one correspondence with the CMC groups. Each CMC group is connected to the BMU through one daisy chain bus. This embodiment helps a battery pack and an electric vehicle to avoid damage caused by a chip on the CMC in a process of plugging or unplugging the MSD switch, and help the CMC accurately monitor the battery units in the rechargeable battery.