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：US20210107377A1

公开(公告)日：2021-04-15

申请号：US17130768

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jianwei ZHUO ,  Zhongliang GUO ,  Guoxiu WU ,  Qiandeng LI

IPC: B60L58/18 ,  G01R31/3835 ,  B60L58/12 ,  H01M10/42 ,  H01M10/48

Abstract: Embodiments of this application disclose a rechargeable battery monitoring system, a battery pack, and an electric vehicle. The rechargeable battery monitoring system includes multiple CMCs, a BMU, and a first bus. Each CMC is connected to the first bus and configured to monitor at least one battery module of a battery pack. The BMU is connected to the first bus and configured to communicate with at least one CMC. The rechargeable battery monitoring system further includes multiple pull-up and/or pull-down modules disposed on a communication path between two adjacent CMCs as part of the first bus. This rechargeable battery monitoring system can stabilize a level on the communication path between the two adjacent CMCs, mitigate an impact caused by external interference onto communication, and improve communication quality.

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.