公开(公告)号：US20230064607A1

公开(公告)日：2023-03-02

申请号：US17858862

申请日：2022-07-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiong ZHENG ,  Xianxi PAN ,  Zhimin DAN ,  Hong WANG

IPC: H02P27/08 ,  H02M7/5395

Abstract: This application provides an electric motor control method and device, a system, and an electric vehicle. The method includes: obtaining an input power and an output power of an electric motor; calculating a loss power based on the input power and the output power; determining a target d-axis current of the electric motor, where the target d-axis current is calculated by a calculation module based on the loss power, the calculation module includes a tracking differentiator, and the calculation module operates in a controller; and determining a duty ratio based on the target d-axis current and a preset q-axis current, and inputting the duty ratio into an inverter so that the inverter drives, based on the duty ratio, the electric motor to operate.

公开(公告)号：US20230064434A1

公开(公告)日：2023-03-02

申请号：US17706648

申请日：2022-03-29

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Zhanliang LI ,  Zhimin DAN ,  Miaomiao ZHANG ,  Yu YAN ,  Zhenhui HUANG

IPC: B60S5/06 ,  G05B15/02 ,  G06T7/70

Abstract: Embodiments of the present application provide a battery swapping method, module, device and medium. The method includes: acquiring a first image captured for a vehicle within a battery swapping area, and acquiring a first location of a battery on the vehicle; determining a second location of the vehicle in the battery swapping area according to the first image; determining, according to the first location and the second location, a target location of the battery in the battery swapping area to control a battery swapping device to move to the target location for battery swapping. According to the embodiments of the present application, battery swapping can be completed in a case where a user parks the vehicle randomly in the battery swapping area. Thus, convenience of the battery swapping process is improved.

公开(公告)号：US20230062270A1

公开(公告)日：2023-03-02

申请号：US17562259

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Zhanliang LI ,  Yuanmiao ZHAO ,  Xiyang ZUO ,  Xiaojian HUANG ,  Zhimin DAN ,  Yu YAN

IPC: H01M10/615 ,  H01M10/625 ,  H01M10/63 ,  H01M50/249

Abstract: The present application relates to a method for heating a battery pack, where the battery pack is connected to an inductive load via a converter and the method includes: controlling on and off of a switch module in the converter upon receiving a heating request, so as to control discharging and charging between the battery pack and the inductive load, connecting the battery pack and an auxiliary heating mechanism in parallel during a discharging stage of the battery pack; and disconnecting the auxiliary heating mechanism from the battery pack during a charging stage of the battery pack. The present application further relates to a battery heating system and an electric apparatus.

公开(公告)号：US20230037865A1

公开(公告)日：2023-02-09

申请号：US17562562

申请日：2021-12-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian HUANG ,  Zhimin DAN ,  Xianxi PAN ,  Jinfeng GAO

IPC: B60L58/27 ,  H01M10/615 ,  H01M10/44 ,  H01M10/625

Abstract: The present application provide a control method of a power battery heating system. The method includes: controlling all upper bridge arms of a first bridge arm group and all lower bridge arms of a second bridge arm group to be turned on, and all lower bridge arms of the first bridge arm group and all upper bridge arms of the second bridge arm group to be turned off, so as to form a first loop; controlling all the lower bridge arms of the first bridge arm group and all the upper bridge arms of the second bridge arm group to be turned on, and all the upper bridge arms of the first bridge arm group and all the lower bridge arms of the second bridge arm group to be turned off, so as to form a second loop. The method is used to heat the power battery.

公开(公告)号：US20220368270A1

公开(公告)日：2022-11-17

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：US20220368262A1

公开(公告)日：2022-11-17

申请号：US17878368

申请日：2022-08-01

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xiaojian HUANG ,  Xiyang ZUO ,  Zhimin DAN ,  Bao LI

IPC: H02P25/22 ,  H02K3/28 ,  B60L50/51 ,  B60L58/27

Abstract: An electric motor, a power system, a control method, and an electric vehicle. The electric motor comprises a first N-phase winding set and a second N-phase winding set, wherein the first N-phase winding set and the second N-phase winding set are both used for being connected to a traction battery by means of a conversion module. When the traction battery starts to be heated, the first N-phase winding set and the second N-phase winding set are powered on. The direction of a magnetic field generated by the first winding set and the direction of a magnetic field generated by the second winding set have a phase difference, such that the magnetic fields counteract each other; and a magnetic field intensity in a stator winding of each phase is reduced, and an air-gap magnetic flux is also reduced, thereby alleviating the problems of electric motor heating and electric motor NVH.

公开(公告)号：US20220239127A1

公开(公告)日：2022-07-28

申请号：US17459220

申请日：2021-08-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Weiping SUN ,  Zhimin DAN ,  Zhanliang LI ,  Shuyun XIONG ,  Yu YAN

IPC: H02J7/00 ,  B60L58/12 ,  G01R31/382

Abstract: Embodiments of the present application provides a method for pre-charging a power conversion device and a power conversion device. The power conversion device is configured to perform power conversion between a charging pile and a traction battery, and the method includes: receiving, by the power conversion device, a first message sent by a battery management system of the traction battery, and the first message is configured to indicate that the battery management system is ready for charging; performing, by the power conversion device, a pre-charging, and the pre-charging includes: charging a capacitor in the power conversion device; and forwarding, by the power conversion device, the first message to the charging pile after the pre-charging is completed. The technical solution of the embodiments of the present application can ensure a normal charging process.

公开(公告)号：US20220239120A1

公开(公告)日：2022-07-28

申请号：US17543061

申请日：2021-12-06

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Weiping SUN ,  Zhimin DAN ,  Zhanliang LI ,  Shuyun XIONG ,  Xiyang ZUO

IPC: H02J7/00

Abstract: Embodiments of the present application provide a pre-charging method of a power conversion device and a power conversion device. The power conversion device is used for a power conversion between a charging pile and a power battery and the method includes: receiving, by the power conversion device, a first message transmitted by a battery management system of the power battery, where the first message is used to indicate a charging readiness of the battery management system; and forwarding, by the power conversion device, the first message to the charging pile and performing a pre-charging, where the pre-charging includes charging a capacitor in the power conversion device. The technical solution in embodiments of the present application is capable of ensuring normal performing of a charging process.

公开(公告)号：US20210354592A1

公开(公告)日：2021-11-18

申请号：US17385879

申请日：2021-07-26

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Xiyang ZUO ,  Zhimin DAN ,  Xiong ZHENG ,  Bao LI ,  Tiancong WANG

IPC: B60L58/27 ,  B60L58/12 ,  H01M10/615 ,  H01M10/625 ,  H01M10/633 ,  H01M10/657 ,  H01M10/42

Abstract: A battery pack heating system includes: a main positive switch, a main negative switch, an inverter, an external port, a motor, a control module for auxiliary charging branch, a vehicle control unit, a motor control unit, and a battery management module. The battery management module is configured to send, when an acquired state parameter of the battery pack meets a preset low-temperature-low-power condition, a low-temperature-low-power heating request instruction to the vehicle control unit and the control module respectively. The control module is configured to send a first control signal to control the auxiliary charging branch to be connected. The vehicle control unit is configured to send a second control signal to enable the motor control unit to control on-off of the switch modules in the inverter, and a third control signal to enable the battery management module to control on-off of the main positive switch.

公开(公告)号：US20210116486A1

公开(公告)日：2021-04-22

申请号：US17134564

申请日：2020-12-28

Applicant: Contemporary Amperex Technology Co., Limited

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

IPC: G01R27/20 ,  H01H47/00 ,  H01M10/42 ,  B60L50/60 ,  B60L3/00 ,  B60L3/12 ,  G01R31/327

Abstract: Provided is a method and device for obtaining internal side and external side insulation resistances of a relay. The method includes: controlling an insulation resistance obtaining circuit to output an AC signal; when both a main relay and a pre-charge relay are switched off, obtaining a first phase shift of the AC signal between two sampling points according to first collected electrical signals; obtaining an internal side insulation resistance of the main relay according to the first collected electrical signals and the first phase shift; controlling the pre-charge relay to be switched on; when the main relay is switched off and the pre-charge relay is switched on, obtaining a second phase shift of the AC signal between the two sampling points according to second collected electrical signals; and obtaining an external side insulation resistance of the main relay according to the second collected electrical signals and the second phase shift.