公开(公告)号：US11413965B2

公开(公告)日：2022-08-16

申请号：US17482455

申请日：2021-09-23

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yanhui Fu ,  Guoxiu Wu ,  Baohai Du ,  Changjian Liu

IPC: B60L3/00 ,  H03K17/687

Abstract: The application discloses a high voltage interlock circuit and a detection method thereof. The circuit comprises: a first switching module; a second switching module, comprising a first driving unit and a first switching unit arranged in isolation, the first switching unit is arranged between a second power supply and a second power ground; a third switching module, comprising a second driving unit and a second switching unit arranged in isolation; a fourth switching module, arranged between the fourth power supply and the first power ground; a controller. The embodiments of the application improve the accuracy of fault detection.

公开(公告)号：US20220120796A1

公开(公告)日：2022-04-21

申请号：US17566715

申请日：2021-12-31

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yanhui Fu ,  Le Chu

IPC: G01R27/14

Abstract: The present application discloses a circuit and a method for detecting insulation resistance. The circuit includes: a first voltage dividing module, a second voltage dividing module, a third voltage dividing module, a fourth voltage dividing module, a first switch module, a fifth voltage dividing module, a second switch module, a third switch module, and a detecting module, where the first voltage dividing module comprises a first voltage dividing unit and a second voltage dividing unit, and the third voltage dividing module comprises a third voltage dividing unit and a fourth voltage dividing unit. According to the embodiments of the present application, errors caused by fluctuations in the pull-up of the reference power supply can be avoided, and the accuracy of the circuit for detecting insulation resistance can be effectively improved.

公开(公告)号：US11435389B2

公开(公告)日：2022-09-06

申请号：US17491110

申请日：2021-09-30

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yanhui Fu ,  Baohai Du ,  Guoxiu Wu

IPC: G01R31/00 ,  B60L3/00 ,  G01R31/52

Abstract: Embodiments of this application relate to the technical field of electronics, and disclose an electrical control device detection circuit, a detection method, and an electric vehicle. In some embodiments of this application, the detection circuit is configured to detect a drive circuit of the electrical control device. The drive circuit includes a high-side switch unit. The detection circuit includes a first detection module and a control module. A first end of the first detection module is connected to a first end of the electrical control device. A second end of the first detection module is connected to a second end of the electrical control device. A third end of the first detection module is connected to the control module.

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：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.

公开(公告)号：US11927639B2

公开(公告)日：2024-03-12

申请号：US17490055

申请日：2021-09-30

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Weiqiang Li ,  Yanhui Fu ,  Xingchang Wang ,  Changjian Liu

IPC: G01R31/00 ,  B60R16/03 ,  G01R31/36 ,  G01R31/52

CPC classification number: G01R31/36 ,  B60R16/03 ,  G01R31/006 ,  G01R31/52

Abstract: The application provides a high-voltage interlocking device and method for detecting the high-voltage interlocking device. The high-voltage interlocking device includes a first resistance module; a first switch module, a second connection end of the first switch module being connected to a first reference potential through a third resistance module, and a control terminal of the first switch module being configured to receive a first driving signal, to enable the first switch module to be turned on or off; a second resistance module, another end of the second resistance module being connected to a second reference potential; a fourth resistance module; a second switch module, a second connection end of the second switch module being connected to a third reference potential through a fifth resistance module; a fault detection module, configured to determine a fault of the high-voltage component underdetection according to a first detection signal.

公开(公告)号：US11867748B2

公开(公告)日：2024-01-09

申请号：US17552348

申请日：2021-12-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baohai Du ,  Changjian Liu ,  Yanhui Fu

IPC: G01R31/00 ,  G01R31/28 ,  G01R31/52 ,  G05B23/02 ,  B60L50/60

CPC classification number: G01R31/282 ,  B60L50/60 ,  G05B23/02 ,  B60L2240/40

Abstract: This application discloses an electrical control device detection circuit, a detection method, and an electric vehicle. The detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module, a high-side switch unit, and a low-side switch unit. The detection circuit includes: a detection power module, a first switch module, a second switch module, 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 a fault occurs in the drive circuit of the electrical control device.

公开(公告)号：US20220107353A1

公开(公告)日：2022-04-07

申请号：US17552348

申请日：2021-12-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Baohai Du ,  Changjian Liu ,  Yanhui Fu

IPC: G01R31/28 ,  G05B23/02 ,  B60L50/60

Abstract: This application discloses an electrical control device detection circuit, a detection method, and an electric vehicle. The detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module, a high-side switch unit, and a low-side switch unit. The detection circuit includes: a detection power module, a first switch module, a second switch module, 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 a fault occurs in the drive circuit of the electrical control device.

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.