公开(公告)号：US11360136B2

公开(公告)日：2022-06-14

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 ,  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：US11088553B2

公开(公告)日：2021-08-10

申请号：US16671360

申请日：2019-11-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yanhui Fu ,  Qidong Lou ,  Xinxin Jiang ,  Qiandeng Li

IPC: H02J7/00 ,  B60L50/60 ,  B60L58/10

Abstract: The present disclosure provides a control system, comprising a controller and a plurality of power regulating modules; the plurality of power regulating modules comprise at least one first power regulating module and at least one second power regulating module, the first power regulating module is woken up upon receiving an external wake-up signal, the controller is connected to an output end of one of the first power regulating modules, and an output end of the second power regulating module is connected to a load module; the controller is further connected to a wake-up end of the second power regulating module; the first power regulating module connected to the controller supplies power to the controller; the at least one second power regulating module is woken up upon receiving an internal wake-up signal sent by the powered on controller or upon receiving the external wake-up signal.

公开(公告)号：US11760226B2

公开(公告)日：2023-09-19

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: H01M10/00 ,  B60L58/18 ,  G01R31/3835 ,  B60L58/12 ,  H01M10/42 ,  H01M10/48

CPC classification number: B60L58/18 ,  B60L58/12 ,  G01R31/3835 ,  H01M10/4257 ,  H01M10/482 ,  H01M2010/4271

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：US11048316B2

公开(公告)日：2021-06-29

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 ,  G06F1/26 ,  G06F1/30 ,  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：US20210039498A1

公开(公告)日：2021-02-11

申请号：US17083330

申请日：2020-10-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yuqun ZENG ,  Kai Wu ,  Wei Dai ,  Chao Wang ,  Qiandeng Li

IPC: B60L3/04 ,  B60L3/00 ,  H03K17/687

Abstract: The present disclosure provides a high-voltage interlock system and a detection method thereof. The high-voltage interlock system includes a target control device and at least one non-target control device connected in sequence. The target control device includes a detection unit, a current generation controller, a current generator, and a second high-voltage component. A controller in the target control device generates a pulse drive signal for driving the current generation controller, receives a detection result signal output from a current detector, and determines a fault of a high-voltage interlock circuit according to the detection result signal; the current generation controller generates an alternating voltage signal according to the pulse drive signal; the current generator outputs an alternating current signal according to the alternating voltage signal; the current detector acquires a voltage signal across a detection resistor set and outputs the detection result signal.

公开(公告)号：US11656672B2

公开(公告)日：2023-05-23

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: G06F1/26 ,  G06F1/30 ,  G06F1/32 ,  G06F1/3225 ,  G06F1/3234

CPC classification number: G06F1/3225 ,  G06F1/263 ,  G06F1/30 ,  G06F1/3275

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：US11258278B2

公开(公告)日：2022-02-22

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 ,  G01R19/165

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：US11085960B2

公开(公告)日：2021-08-10

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: G01R31/50 ,  G01R31/14 ,  G01R31/389 ,  G01R31/3835 ,  G01R27/14

Abstract: 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.

公开(公告)号：US10814726B2

公开(公告)日：2020-10-27

申请号：US16364395

申请日：2019-03-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuqun Zeng ,  Kai Wu ,  Chao Wang ,  Wei Dai ,  Qiandeng Li

IPC: B60L3/00 ,  H01L47/00 ,  H03K19/20 ,  H01H47/00 ,  H01H47/22

Abstract: A control apparatus comprises a microcontroller, an auxiliary circuit, a delay module and a logical circuit; the microcontroller is connected to a first input end of the logical circuit via the auxiliary circuit and connected to a second input end of the logical circuit via the delay module, and an output end of the logical circuit is connected to a device to be controlled; if the microcontroller is reset in a process of outputting the closing control signal, a delay disabling signal becomes invalid, the delay module is enabled to output the closing control signal within a preset delay time, wherein the delay time is greater than or equal to a reset time. A power supply system is also provided to avoid a risk that an automobile suddenly loses power due to unexpected reset of the microcontroller.

公开(公告)号：US20200274289A1

公开(公告)日：2020-08-27

申请号：US16798365

申请日：2020-02-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jinglin Li ,  Jianwei Zhuo ,  Changjian Liu ,  Qiandeng Li

IPC: H01R13/53 ,  G01R31/316 ,  B60L50/16 ,  H01R13/70 ,  H01R13/66

Abstract: The disclosure provides high voltage interlock circuit and detection method. The circuit comprises: a power module, a positive electrode of the power module being connected to one end of a current generating module; the current generating module, the other end of the current generating module being connected to a first terminal of a high voltage component module to inject a constant DC current into the high voltage component module; a first voltage dividing module, one end of the first voltage dividing module being connected to a second terminal of the high voltage component module, and the other end of the first voltage dividing module being connected to a negative electrode of the power module and a power ground; and a processing module to determine a fault of the high voltage component module based on a first voltage collected from the second terminal of the high voltage component module.