公开(公告)号：US20230130303A1

公开(公告)日：2023-04-27

申请号：US18085490

申请日：2022-12-20

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian Huang ,  Zhimin Dan ,  Xianxi Pan ,  Xiyang Zuo

IPC: H02P29/68 ,  H02P27/06 ,  H02P21/14

Abstract: The embodiments of the present disclosure provide a control method, a device, a power system, and an electric vehicle. The method is applied to a motor controller of the power system. The power system further includes a power battery, a motor, and an inverter. The method includes: sending a first control signal to the inverter when a cell temperature of the power battery satisfies a preset heating condition for the power battery; where the first control signal is configured to control the inverter to convert an electricity provided by the power battery into an alternating current with a frequency changing randomly, and the alternating current with the frequency changing randomly is configured to supply power to the motor.

公开(公告)号：US20230120625A1

公开(公告)日：2023-04-20

申请号：US18059446

申请日：2022-11-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qidong Lou ,  Jinbo Cai ,  Wei Zhang ,  Zhimin Dan

IPC: H02J7/00 ,  H02J7/02

Abstract: A charging device, a charging control method, an energy management system and a storage medium are provided. The charging device includes: a charging circuit including a voltage stability control circuit, an output port and an input port; the voltage stability control circuit being connected to a high-voltage alternating current through the input port and connected to a battery through the output port, and configured to convert the high-voltage alternating current into a low-voltage direct current, charge the battery with a positive pulse current during a first period and charge the battery with a negative pulse current during a second period; and an energy absorption circuit connected in parallel with the charging circuit and configured to absorb the negative pulse current.

公开(公告)号：US11606058B2

公开(公告)日：2023-03-14

申请号：US17878424

申请日：2022-08-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian Huang ,  Zhimin Dan ,  Bao Li ,  Xiyang Zuo

IPC: H02P29/60 ,  B60L50/60 ,  B60L58/27

Abstract: Disclosed is a motor, a control method, a power system, and an electric vehicle. Each phase stator winding of the motor includes two sub-winding sets. When a traction battery needs to be heated, the two sub-winding sets of the motor store electrical energy and provide alternating currents to the traction battery through an inverter, so that the traction battery uses its internal resistance for heating. In addition, the two sub-winding sets generate opposite magnetic fields which cancel each other out, so that the strength of the magnetic field inside each phase stator winding and the air gap magnetic flux are reduced, thereby alleviating the heat generation and NVH problems of the motor.

公开(公告)号：US11600992B2

公开(公告)日：2023-03-07

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: H02H7/00 ,  H02H7/20 ,  H02H7/18 ,  H02J7/00 ,  H02H7/22

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：US20230049854A1

公开(公告)日：2023-02-16

申请号：US17858857

申请日：2022-07-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiong ZHENG ,  Xianxi Pan ,  Feilong CAl ,  Zhimin Dan

IPC: G01L5/00 ,  G01R19/00

Abstract: Embodiments of this application provide a torque obtaining method and device, a motor controller, and a readable storage medium. The torque obtaining method includes: obtaining a rotation speed of a motor; obtaining a current of the motor; obtaining a flux linkage of the motor; determining an electromagnetic torque of the motor based on the current and the flux linkage; and inputting the rotation speed and the electromagnetic torque into a preset status observer, and obtaining an observed value of an actual output torque of the motor, where the observed value is output by the status observer. The obtaining method is intended to obtain the actual output torque effectively, simply, and accurately.

公开(公告)号：US11418046B2

公开(公告)日：2022-08-16

申请号：US16976137

申请日：2019-12-06

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H02J7/00 ,  H03K17/567 ,  H03K17/687

Abstract: A charge and discharge circuit includes: a charging loop, including a battery pack, a first switch module and a charging device connected in series, where, the charging loop is configured to charge the battery pack using the charging device, and precharge the charging device; and a discharging loop, including the battery pack, a second switch module and an electric device connected in series, where, the discharging loop is configured to make the battery pack discharge to the electric device, and precharge the electric device; where, the first switch module and the second switch module each include at least one switch, and a part of switches in the first switch module and the second switch module are semiconductor switches, and the other part of the switches in the first switch module and the second switch module are relays.

公开(公告)号：US20220219568A1

公开(公告)日：2022-07-14

申请号：US17541296

申请日：2021-12-03

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiaojian HUANG ,  Xiong Zheng ,  Xiyang Zuo ,  Zhimin Dan ,  Bao Li

IPC: B60L58/27 ,  H01M10/615 ,  H05B1/02 ,  B60L53/20 ,  H01M10/657 ,  H01M10/63 ,  H01M10/48 ,  H01M10/42 ,  H02P27/06

Abstract: The present application provides a battery thermal management system, a control method and device of a battery heating system, a device, and a medium. The method includes: acquiring a temperature rise rate parameter of the battery; determining proportions of a square wave signal and a sine wave signal in a first control signal of the switch components according to the temperature rise rate parameter; generating the first control signal of the switch components according to the proportions of the square wave signal and the sine wave signal; outputting the first control signal to the switch components to control switching on or off of the switch components via the first control signal, so as to generate an alternating current in a loop connecting the battery and the motor and heat the battery using the alternating current.

公开(公告)号：US11353515B2

公开(公告)日：2022-06-07

申请号：US16559644

申请日：2019-09-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiao Wang ,  Chao Zeng ,  Jia Xu ,  Zhimin Dan ,  Yizhen Hou ,  Wei Zhang ,  Guoliang Hu

IPC: G01R31/392 ,  G01R31/3842 ,  G01K3/00 ,  G01K3/10 ,  G01K13/00 ,  H01M10/42 ,  H01M10/48 ,  H02J7/00

Abstract: The disclosure provides a thermal runaway detection circuit and method, and relates to batteries. The thermal runaway detection circuit includes: a sensing module including a sensing cable; a detection module connected to the sensing cable and including at least one set of voltage dividing resistors; a processing module connected to the detection module, wherein the processing module is configured to obtain thermal runaway detection data, and determine whether thermal runaway occurs in the battery pack based on the thermal runaway detection data, wherein the thermal runaway detection data includes battery pack data and sampled data collected from sampling points, and the sampling points are disposed between the two connected voltage dividing resistor sets. The technical solutions in the present disclosure can improve safety of the battery pack.

公开(公告)号：US11351888B2

公开(公告)日：2022-06-07

申请号：US16972574

申请日：2019-01-22

Applicant: Contemporary Amperex Technology Co., Limited

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

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

Abstract: In a battery heating system an inverter includes a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm connected in parallel, each of a upper bridge arm and a lower bridge arm is provided with a switch module, the switch module is connected in parallel with a buffer module; and a motor controller in the inverter is provided for providing driving signals to the switch module of a target upper bridge arm and the switch module of a target lower bridge arm to control the switch module of the upper bridge arm of any bridge arm among the three phases of bridge arms and the switch module of the lower bridge arm of at least one bridge arm among the bridge arms except the bridge arm where the switch module of the target upper bridge arm is located to be periodically turned on and off.

公开(公告)号：US11329866B2

公开(公告)日：2022-05-10

申请号：US17155109

申请日：2021-01-22

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: H04L12/24 ,  H04L41/0668 ,  H04B1/713

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.