公开(公告)号：US11287454B2

公开(公告)日：2022-03-29

申请号：US17057433

申请日：2019-12-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yizhen Hou ,  Zhimin Dan ,  Wei Zhang ,  Jinbo Cai ,  Xiong Zheng

IPC: G01R19/25 ,  G01R19/00 ,  G01R19/32

Abstract: The present disclosure discloses a current sampling method and a current sampling circuit. The method comprises: obtaining a detected temperature of each semiconductor switch device of a plurality of parallel semiconductor switch devices; determining that the plurality of parallel semiconductor switch devices are in a current equalization state based on the detected temperature of each semiconductor switch device; obtaining an equalized current flowing through a target semiconductor switch device in the current equalization state, the target semiconductor switch device being any one of the plurality of parallel semiconductor switch devices; determining a total current of a main circuit connected to the plurality of parallel semiconductor switch devices according to the equalized current.

公开(公告)号：US11251630B2

公开(公告)日：2022-02-15

申请号：US16559645

申请日：2019-09-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Zhang ,  Zhimin Dan ,  Yizhen Hou ,  Jia Xu ,  Jiechao Luo ,  Wenbin Lu ,  Teng Yu

IPC: H02J7/00 ,  G01R31/382 ,  G01R31/396 ,  H01M10/42

Abstract: The battery management system comprises: a battery management unit, configured to receive status information of a battery module and status information of a battery pack, and transmit a control instruction to cell measurement circuits; the cell measurement circuits, configured to collect the status information of the battery module, transmit the status information of the battery module to the battery management unit, receive and execute the control instruction transmitted from the battery management unit; sensing units, configured to collect the status information of the battery pack, and transmit the status information of the battery pack to the battery management unit; wherein a wireless communication unit is disposed in the battery management unit, and a wireless communication unit is disposed in at least a portion of the cell measurement circuits and/or at least a portion of the sensing units.

公开(公告)号：US11139514B2

公开(公告)日：2021-10-05

申请号：US17057261

申请日：2018-12-28

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiyang Zuo ,  Zhimin Dan ,  Yizhen Hou ,  Wei Zhang ,  Xingyuan Wu ,  Taosheng Zhu

IPC: H01M10/637 ,  H01M10/615 ,  H01M10/625 ,  B60L58/24 ,  B60L58/18

Abstract: A battery pack heating apparatus for double vehicle heating and a control method. In the embodiments of the present application, the apparatus is portably arranged outside a vehicle, and includes: an energy storage device; a current sensor; a first diode, an input end of the first diode connected with a second end of the current sensor; a first heating interface; a first switching device connected between the second end of the current sensor and a positive electrode of the first heating interface; a second diode, an output end of the second diode connected with the second end of the current sensor; a second heating interface; a second switching device connected between the second end of the current sensor and a negative electrode of the second heating interface; and a heating control module configured to control on-off states of the first and the second switching devices.

公开(公告)号：US11120958B2

公开(公告)日：2021-09-14

申请号：US16981260

申请日：2019-11-15

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin Dan ,  Delong Shi ,  Yizhen Hou ,  Wei Zhang ,  Liansong Wang

IPC: H01H47/32 ,  B60L50/60 ,  B60L3/00 ,  H01H47/00 ,  H01H47/18

Abstract: The embodiments of the present disclosure disclose a relay holding circuit and a battery management system. the relay holding circuit may include: a high-voltage isolated power source, a power source driving module, and a microprocessor of a battery management system; the high-voltage isolated power source may be respectively connected to two electrodes of a battery pack, an output terminal of the power source driving module, the microprocessor, and a first terminal of a first switching device; an input terminal of the power source driving module may be connected to the microprocessor; the microprocessor may be further connected to a primary battery, the microprocessor may output a low-level signal to the power source driving module when the primary battery supplies power abnormally.

公开(公告)号：US11102651B2

公开(公告)日：2021-08-24

申请号：US16555020

申请日：2019-08-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wenbin Lu ,  Zhimin Dan ,  Yizhen Hou ,  Wei Zhang ,  Jia Xu ,  Jiechao Luo ,  Teng Yu

IPC: H04L9/08 ,  H04W12/06 ,  H04L9/30 ,  H04L9/14 ,  H04L29/06 ,  H04W12/033 ,  H04W12/041 ,  H04W12/71 ,  H04W12/0471 ,  H04L9/32

Abstract: The embodiments of the present disclosure disclose a method for data transmission, comprising: authenticating, by a target node in a battery management system, a source node in response to a request for data transmission from the source node; selecting, by the target node, any two prime numbers from a pre-stored set of prime numbers if the authentication is passed, generating a public key and a private key according to the two prime numbers, and transmitting the public key to the source node; performing, by the source node, a first encryption byte-by-byte for source data to be transmitted using the public key, performing a second encryption for the first encrypted data using a first encryption algorithm stored by the source node itself, and transmitting the second encrypted data to the target node.

公开(公告)号：US10971771B2

公开(公告)日：2021-04-06

申请号：US16297233

申请日：2019-03-08

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin Dan ,  Xiyang Zuo ,  Wei Zhang ,  Yizhen Hou ,  Guowei Li ,  Xingyuan Wu ,  Yanru Li

IPC: H02P27/08 ,  H02P6/14 ,  H01M10/63 ,  H01M10/615 ,  H01M10/625 ,  H01M10/42 ,  H01M10/48 ,  H02J7/00 ,  H02P3/18 ,  H02P27/06 ,  H03K19/20

Abstract: The present disclosure provides a battery heating system and a control method thereof. The battery heating system includes a main positive switch, a main negative switch, an inverter, a motor, and a battery management unit. The inverter includes a first phase bridge arm, a second phase bridge arm and a third phase bridge arm connected in parallel. A motor controller in the inverter is configured to output a drive signal to a target upper-bridge-arm switch unit and a target lower-bridge-arm switch unit, so as to control the target upper-bridge-arm switch unit and the target lower-bridge-arm switch unit to be periodically turned on and off. The battery management unit is configured to collect state parameters of the battery pack. When the state parameters of the battery pack meet preset heating conditions, a control signal is sent to the motor controller to control the motor controller to output the drive signal.

公开(公告)号：US10895593B2

公开(公告)日：2021-01-19

申请号：US16233095

申请日：2018-12-27

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Wei Zhang ,  Zhimin Dan ,  Yizhen Hou ,  Meng Li ,  Weiping Sun ,  Teng Yu

IPC: G01R31/12 ,  G01R31/3835 ,  G01R27/02 ,  G01R31/00 ,  G01R31/50 ,  G01R31/389

Abstract: The present disclosure provides a parameter selection method, apparatus, and computer readable storage medium for an insulation detection circuit. The parameter selection method includes determining an allowable injection frequency range of an AC signal to be injected, according to a predetermined resistance range of an insulation resistance of the power battery under test and a predetermined resistance calculation cycle of the insulation resistance; and selecting an output frequency of the signal generation module according to a lowest frequency to be generated by the signal generation module and the allowable injection frequency range.

公开(公告)号：US10884061B2

公开(公告)日：2021-01-05

申请号：US16112719

申请日：2018-08-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jiechao Luo ,  Wei Zhang ,  Zhanyu Sun ,  Yizhen Hou ,  Zhimin Dan

IPC: G01R31/364 ,  G01R31/327 ,  H01H47/00 ,  G01R31/36

Abstract: A relay diagnosis circuit, diagnosis method, and battery management system are disclosed in the present disclosure. The relay diagnosis circuit may include a first sampling unit, a second sampling unit, a first sampling point, a second sampling point, a reference voltage terminal, and a processor. A first end of the first sampling unit is connected with voltage output end of the power battery pack to be measured and a first end of a relay. A second end of the first sampling unit is connected with the reference voltage terminal and the first sampling point. A first end of the second sampling unit is connected with a second end of the relay. A second end of the second sampling unit is connected with the reference voltage terminal and the second sampling point.

公开(公告)号：US20240363918A1

公开(公告)日：2024-10-31

申请号：US18765330

申请日：2024-07-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhanliang Li ,  Yuanmiao Zhao ,  Yu Yan ,  Zhimin Dan ,  Xiaojian Huang ,  Xinwei Chen

IPC: H01M10/637 ,  B60L58/27 ,  H01M10/615 ,  H01M10/625 ,  H01M10/63 ,  H02J7/00 ,  H02P27/08 ,  H02P29/60

CPC classification number: H01M10/637 ,  H01M10/615 ,  H01M10/625 ,  H01M10/63 ,  H02J7/0063 ,  H02P27/08 ,  H02P29/60 ,  B60L58/27 ,  H01M2220/20

Abstract: Disclosed is a control method of a heating system for a battery. The control method includes: alternately controlling a switch module to be in a first switch state within a first duration and in a second switch state within a second duration; discharging to a power supply module by an energy storage module through a first loop within the first half time T of the first duration, and charging the energy storage module by the power supply module through the first loop within the second half time T of the first duration; and discharging to the power supply module by the energy storage module through a second loop within the first half time T of the second duration, and charging the energy storage module by the power supply module through the second loop within the second half time T of the second duration.

公开(公告)号：US12119697B2

公开(公告)日：2024-10-15

申请号：US18594808

申请日：2024-03-04

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Yuanmiao Zhao ,  Zhimin Dan ,  Yu Yan ,  Zhanliang Li ,  Xiaojian Huang ,  Xinwei Chen

IPC: H02J7/00 ,  B60L58/18 ,  H02J7/14

CPC classification number: H02J7/00712 ,  B60L58/18 ,  H02J7/0014 ,  B60L2240/547

Abstract: A voltage regulation circuit for traction battery includes a traction battery, a heating module, a charge/discharge interface, and a voltage regulation module. The heating module includes a power storage element and a switch module. The traction battery is connected in parallel to the switch module. An external charging and discharging device is connected in parallel to the traction battery through the charge/discharge interface. The voltage regulation module includes a plurality of switches and a power storage regulation element, and the plurality of switches and the power storage regulation element are disposed between the charge/discharge interface and the traction battery. The voltage regulation module and the switch module are configured to regulate, in response to a voltage regulation control signal, a charge/discharge voltage between the traction battery and the power storage element and a charge voltage of the external charging and discharging device for the traction battery.