公开(公告)号：US20200235586A1

公开(公告)日：2020-07-23

申请号：US16587126

申请日：2019-09-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Dachun YANG ,  Baohai DU ,  Yanhui FU ,  Qiandeng LI

IPC: H02J7/00 ,  G06F13/40 ,  H02M3/335 ,  H02H9/00

Abstract: Embodiments of the present disclosure relate to the field of battery technologies, and disclose a pre-charging circuit for a high voltage battery pack and a pre-charging method therefor. In some embodiments of the present disclosure, during a charging process, a control module switches on a charging switching module and switches off a charging pre-charging module after determining that a voltage at the first end of the charging switching module and a voltage at the second end of the charging switching module comply with a first constraint relationship; during a discharging process, the control module switches on the main positive switching module and switches off the main positive pre-charging module after determining that a voltage at the first end of the main positive switching module and a voltage at the second end of the main positive switching module comply with a second constraint relationship.

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：US20200088799A1

公开(公告)日：2020-03-19

申请号：US16357563

申请日：2019-03-19

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Kai WU ,  Guoxiu WU ,  Shushuai HU ,  Qiandeng LI ,  Yanhui FU

IPC: G01R31/36 ,  H01M2/10 ,  H01M10/42 ,  G01R31/382

Abstract: The present disclosure relates to a sampling assembly and a battery pack. The assembly comprises: a circuit board comprising a sampling unit; a first detector comprising a first and second connecting ends arranged at interval, wherein the first detector is connected to the circuit board via the first and second connecting ends to transmit information on first voltage between the first and second connecting ends to the circuit board, and the first detector is connectable in series to and between the two terminals to be detected; and a second detector located in a magnetic field generated by current flowing through the first detector and can generate information on second voltage according to the magnetic field, wherein the second detector comprises an output terminal and is connectable to the circuit board via the output terminal to transmit the information on second voltage to the sampling unit.