公开(公告)号：US20210075069A1

公开(公告)日：2021-03-11

申请号：US16953513

申请日：2020-11-20

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiyang ZUO ,  Zhimin DAN ,  Wei ZHANG ,  Yizhen HOU ,  Teng YU ,  Wenbin LU ,  Xingyuan WU ,  Taosheng ZHU

IPC: H01M10/44 ,  H01M10/48 ,  H01M10/42

Abstract: A battery pack system, a control method thereof and a management device are provided. A battery pack is connected in series with a discharge circuit unit and a charge circuit unit; a battery management unit is to monitor a temperature of the battery pack, to periodically send, when the temperature of the battery pack is lower than a threshold, a turn-on-instruction to the discharge circuit unit and the charge circuit unit alternately to control the discharge circuit unit and the charge circuit unit to be alternately turned on in heating cycles; the discharge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the battery pack to flow into the energy storage unit in discharging-phase; and the charge circuit unit is to be turned on according to the turn-on-instruction to enable electricity of the energy storage unit to flow into the battery pack in charging-phase.

公开(公告)号：US20200350935A1

公开(公告)日：2020-11-05

申请号：US16930659

申请日：2020-07-16

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Yizhen HOU ,  Zhimin DAN ,  Wei ZHANG ,  Jiechao LUO ,  Wenbin LU ,  Jia XU ,  Teng YU

IPC: H04B1/04 ,  H04B1/00 ,  H03H7/01 ,  H01Q1/52 ,  H04B1/10

Abstract: A system comprises an antenna, a port converting device, an information transmission device, a shield case, and a reference voltage end; wherein the antenna, the port converting device, and the information transmission device are connected sequentially, and the information transmission device is disposed within the shield case, and both the shield case and the port converting device is connected with the reference voltage end; the antenna is configured for a conversion between a radio frequency signal and a single-ended signal; the port converting device is configured for a conversion between the single-ended signal and target differential mode signals; the information transmission device is configured to transmit and process the target differential mode signals; and parameters of components in the port converting device is determined according to a preset communication frequency and a voltage amplitude and phase of a differential mode signal.

公开(公告)号：US20230387492A1

公开(公告)日：2023-11-30

申请号：US18450375

申请日：2023-08-15

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xinwei CHEN ,  Yu YAN ,  Zhimin DAN ,  Zhanliang LI ,  Yizhen HOU ,  Wei ZHANG

IPC: H01M10/615 ,  H01M10/633 ,  G01R31/36 ,  G01R31/367

CPC classification number: H01M10/615 ,  H01M10/633 ,  G01R31/3648 ,  G01R31/367 ,  H01M2220/20

Abstract: A battery heating system includes a voltage conversion unit configured to be electrically connected to a power source and to a battery to be heated, and a control unit. The voltage conversion unit receives a first voltage input by the power source or a second voltage input by the battery to be heated. The control unit acquires a charging and discharging frequency of the voltage conversion unit, determines a charge transfer impedance of the battery to be heated according to the charging and discharging frequency, calculates a safe amplitude current of the battery to be heated according to the charge transfer impedance, and sends a control signal to the voltage conversion unit according to the charging and discharging frequency and the safe amplitude current to cause the voltage conversion unit to perform boost or buck processing of the first voltage or the second voltage according to the control signal.

公开(公告)号：US20210325466A1

公开(公告)日：2021-10-21

申请号：US17043703

申请日：2019-11-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jian RUAN ,  Shichao LI ,  Yanhua LU ,  Yizhen HOU ,  Wei ZHANG

IPC: G01R31/367 ,  G01R31/374 ,  H02J7/00

Abstract: A method includes: estimating a first estimated time required for the battery to be charged from the state of charge estimation initial value to an upper limit of the state of charge estimation section; estimating a second estimated time required for the battery to be changed in temperature from the temperature estimation initial value to an upper limit of the temperature estimation section; determining a new state of charge estimation initial value, a new state of charge estimation section, and a new temperature estimation initial value and a new temperature estimation section based on a smaller estimated time between the first estimated time and the second estimated time, until an upper limit of an state of charge estimation section reaches a target state of charge and a smaller estimated time is a first estimated time; and accumulating every determined smaller estimated times to obtain an estimated remaining charging time.

公开(公告)号：US20210249707A1

公开(公告)日：2021-08-12

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 ,  H01M10/625 ,  H01M10/615

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：US20210050719A1

公开(公告)日：2021-02-18

申请号：US16966220

申请日：2019-12-06

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Jinbo CAI ,  Zhimin DAN ,  Wei ZHANG ,  Yizhen HOU ,  Xiong ZHENG

IPC: H02H7/18 ,  H02J7/00

Abstract: The present application provides an electric protection circuit, which relates to the field of battery power. The electric protection circuit includes a battery pack, a main positive switch, a load device and a main negative switch connected in series. The main positive switch and/or the main negative switch include at least one semiconductor switch. The main positive switch and/or the main negative switch in the electric protection circuit are connected in parallel to a protection module, which absorbs electric energy across two terminals of the main positive switch and/or the main negative switch when the main positive switch and/or the main negative switch are turned off. The technical solution of the present application can improve the safety of the electric protection circuit.

公开(公告)号：US20210043990A1

公开(公告)日：2021-02-11

申请号：US17078077

申请日：2020-10-22

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Xiyang ZUO ,  Wei ZHANG ,  Yizhen HOU ,  Guowei LI ,  Xingyuan WU ,  Yanru LI

IPC: H01M10/63 ,  H01M10/615 ,  H01M10/625 ,  H01M10/42 ,  H01M10/48 ,  H02J7/00 ,  H02P3/18 ,  H02P27/06

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：US20200084090A1

公开(公告)日：2020-03-12

申请号：US16540402

申请日：2019-08-14

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Wenbin LU ,  Wei ZHANG ,  Yizhen HOU ,  Jia XU ,  Jiechao LUO ,  Teng YU

IPC: H04L12/24

Abstract: The present disclosure provides a battery management system and a communication method. The method includes: determining, by a main BMU, from a plurality of managed units a fault unit that communicates abnormally with the main BMU, and transmitting, by the main BMU, to a backup BMU a fault frequency at which the fault unit communicates abnormally with the main BMU; selecting, by the backup BMU, from the managed units a managed unit that communicates normally with the backup BMU and the fault unit as a target unit; transmitting, by the backup BMU, frequency-conversion information to the fault unit through the target unit based on the fault frequency; converting, by the fault unit, its frequency to a frequency; transmitting the frequency to the main BMU if the backup BMU communicates normally with the fault unit using the frequency; and communicating, by the main BMU, with the fault unit using the frequency.

公开(公告)号：US20200083722A1

公开(公告)日：2020-03-12

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 ,  G01R31/396 ,  G01R31/382

Abstract: The embodiments of the present disclosure disclose a battery management system. 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：US20190064279A1

公开(公告)日：2019-02-28

申请号：US16112718

申请日：2018-08-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhimin DAN ,  Zhanyu SUN ,  Yizhen HOU ,  Jiechao LUO ,  Wei ZHANG

IPC: G01R31/36 ,  G01R31/14

CPC classification number: G01R31/389 ,  G01R27/025 ,  G01R31/14 ,  G01R31/3278 ,  G01R31/3648

Abstract: An insulation detection circuit, detection method, and battery management system are disclosed in the present disclosure. The insulation detection circuit includes a positive sampling unit, a negative sampling unit, a positive sampling point, a negative sampling point, a reference voltage terminal, and a processor. A first end of the positive sampling unit is connected with positive electrode of the power battery pack to be measured. A second end of the positive sampling unit is connected with the reference voltage terminal and the positive sampling point. A first end of the negative sampling unit is connected with negative electrode of the power battery pack to be measured. A second end of the negative sampling unit is connected with the reference voltage terminal and the negative sampling point. The processor is connected with the positive sampling point and the negative sampling point.