公开(公告)号：US20200025833A1

公开(公告)日：2020-01-23

申请号：US16286557

申请日：2019-02-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Fuming YE ,  Fupeng CAI ,  Qiandeng LI ,  Changjian LIU

IPC: G01R31/396 ,  G01R31/367

Abstract: The disclosure discloses a sampling detection circuit and a method for detecting a circuit malfunction. The method includes: receiving a detection instruction and controlling a plurality of equalization modules to be turned off in response to the detection instruction; collecting first sampled data of sampled equalization modules; controlling odd numbered equalization modules among the sampled equalization modules to be turned on and even numbered equalization modules among the sampled equalization modules to be turned off; collecting second sampled data of the sampled equalization modules; controlling the odd numbered equalization modules among the sampled equalization modules to be turned off and the even numbered equalization modules among the sampled equalization modules to be turned on; collecting third sampled data of the sampled equalization modules; and determining, according to the first sampled data, second sampled data and third sampled data, a malfunction in a sampling detection circuit and locating the malfunction.

公开(公告)号：US20240213765A1

公开(公告)日：2024-06-27

申请号：US18595097

申请日：2024-03-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing YANG ,  Zhaoguang WANG ,  Qiandeng LI

IPC: H02H7/18 ,  H02H1/00

CPC classification number: H02H7/18 ,  H02H1/0007

Abstract: A battery pack active fuse control apparatus includes a battery management system and a shunt resistor, where the battery management system includes a short-circuit current detect circuit and a short-circuit current process circuit that are constantly powered. The shunt resistor and an active fuse are connected in series with a power supply loop of a battery pack. The short-circuit current detect circuit is connected to the shunt resistor and the short-circuit current process circuit. The short-circuit current process circuit is connected to the active fuse. The short-circuit current process circuit, upon receiving the short-circuit overcurrent signal, controls the active fuse to break.

公开(公告)号：US20210036388A1

公开(公告)日：2021-02-04

申请号：US16965414

申请日：2019-11-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yu LIU ,  Jinglin LI ,  Qiandeng LI

IPC: H01M10/633 ,  H01M10/615

Abstract: The embodiments of the present disclosure disclose a battery heating system and method, and relate to the field of batteries. The battery heating system may include: a temperature sampling module configured to collect a target sampling temperature; a control module configured to control a heating module to enter a first heating mode when the target sampling temperature is not lower than a preset expected heating temperature; the heating module configured to enter the first heating mode to intermittently heat the battery module set by using a first portion of external electric energy, so as to maintain the target sampling temperature at the preset expected heating temperature.

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：US20200225275A1

公开(公告)日：2020-07-16

申请号：US16577350

申请日：2019-09-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Baohai DU ,  Guoxiu WU ,  Weiqiang LI ,  Qiandeng LI

IPC: G01R31/12 ,  G01R31/3835 ,  G01R31/00

Abstract: The present disclosure provides an insulation detection circuit, a detection method and a battery management system. The insulation detection circuit includes an isolated power module, first positive and negative sampling modules, second positive and negative sampling modules, and a processor. A first end of the second positive sampling module is connected to a positive electrode of the isolated power module and a second end of the positive switch module, a second end of the second positive sampling module is connected to a second reference voltage terminal; a first end of the second negative sampling module is connected to the second reference voltage terminal, a second end of the second negative sampling module is respectively connected to a negative electrode of the isolated power module and a second end of the negative switch module; and the processor is connected to sampling points.

公开(公告)号：US20200006961A1

公开(公告)日：2020-01-02

申请号：US16411390

申请日：2019-05-14

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Fangjie ZHOU ,  Qiandeng LI ,  Fuming YE

IPC: H02J7/00

Abstract: Some embodiments relate to battery management technologies, and disclose a battery management system and an energy storage power station. The battery management system comprises: a plurality of CSC groups corresponding to a plurality of battery packs respectively, CSCs in each CSC group being connected to the battery units in a battery pack respectively; a plurality of SBMUs corresponding to the plurality of CSC groups respectively, each SBMU being connected to every CSC in a CSC group; an MBMU and an IMM, the MBMU being connected to every SBMU and connected to the IMM; the IMM further being connected to a plurality of the batteries, and used to acquire insulation parameter values of the plurality of the batteries.

公开(公告)号：US20200006955A1

公开(公告)日：2020-01-02

申请号：US16382778

申请日：2019-04-12

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Fupeng CAI ,  Fuming YE ,  Qiandeng LI ,  Changjian LIU

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/44 ,  H01M2/10 ,  H01M2/34

Abstract: A battery pack management system includes a controller, an isolation unit, a plurality of battery pack management units, and a plurality of battery packs. The plurality of battery pack management units are connected in series by a first daisy chain, and the plurality of battery pack management units are also connected in series by a second daisy chain. The first daisy chain transmits sampled data that is collected by the battery pack management units from corresponding battery packs and transmits control instructions of the controller. The second daisy chain transmits a failure prompt signal which is generated by a battery pack management unit that detects a failure. A first battery pack management unit and a last battery pack management unit of the plurality of battery pack management units connected in series are connected to the controller through the isolation unit.

公开(公告)号：US20210231726A1

公开(公告)日：2021-07-29

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

Abstract: A circuit includes: an isolation power module, a first sampling module, a first sampling point, a second sampling module, a second sampling point, 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：US20210199706A1

公开(公告)日：2021-07-01

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

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：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.