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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
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.
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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
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.
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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.
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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.
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公开(公告)号：US20230060510A1
公开(公告)日：2023-03-02
申请号：US17858832
申请日：2022-07-06
Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED
Inventor： Xiong ZHENG , Xianxi PAN , Yu LUO , Zhimin DAN
Abstract: This application provides a method and device for updating calibration data of an electric motor, an electronic device, and a storage medium. The method includes: obtaining an initial calibration datum of the electric motor; determining whether a deviation between the initial calibration datum and a theoretical calculation datum exceeds a first threshold; recalibrating the electric motor based on the preset calibration parameter when the deviation between the initial calibration datum and the theoretical calculation datum exceeds the first threshold, and obtaining an updated calibration datum; determining whether a deviation between the updated calibration datum and the initial calibration datum exceeds a second threshold; and updating the initial calibration datum based on the updated calibration datum when the deviation between the updated calibration datum and the initial calibration datum does not exceed the second threshold, thereby updating and rectifying the initial calibration datum.
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Patent Agency Ranking
公开(公告)号：US20210367441A1
公开(公告)日：2021-11-25
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 , H03K17/687 , H03K17/567
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.
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公开(公告)号：US20230067971A1
公开(公告)日：2023-03-02
申请号：US17858864
申请日：2022-07-06
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xiong ZHENG , Xianxi PAN , Yu LUO , Zhimin DAN
Abstract: This application provides a permanent-magnet synchronous machine control method and device, and a permanent-magnet synchronous machine control system. The method includes: obtaining a d-axis current id and a q-axis current iq in a permanent-magnet synchronous machine control loop at a current moment; obtaining a fifth-order harmonic current id5th and a seventh-order harmonic current id7th in the d-axis current id in the permanent-magnet synchronous machine control loop at the current moment, and a fifth-order harmonic current iq5th and a seventh-order harmonic current iq7th in the q-axis current iq in the permanent-magnet synchronous machine loop at the current moment; determining a d-axis current idk+1 at a next moment in each switch state; determining a q-axis current iqk+1 at the next moment in each switch state based on the first current idk, the second current iqk, and the second voltage in each switch state; and determining a control policy of the permanent-magnet synchronous machine.
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8.发明申请公开(公告)号：US20210359348A1
公开(公告)日：2021-11-18
申请号：US17390879
申请日：2021-07-31
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Xiong ZHENG , Zhimin Dan , Xiyang Zuo , Bao Li , Tiancong Wang
IPC: H01M10/44 , H02J7/00 , H02P29/68 , H01M10/615 , H01M10/625 , H01M10/633 , B60L58/27 , B60L3/00 , B60L58/12 , B60L15/20 , B60L53/62
Abstract: The present application provides a switch control device and method, a motor controller, and a battery pack heating control system. The switch control device includes: a processing module configured to select, when it is determined that a switch control cycle switches from a previous cycle to a current cycle, a target upper bridge arm switch module for the current cycle from upper bridge arm switch modules other than a target upper bridge arm switch module for the previous cycle and/or select a target lower bridge arm switch module for the current cycle from lower bridge arm switch modules other than a target lower bridge arm switch module for the previous cycle; wherein the processing module is further configured to: during each switch control cycle, control the target upper bridge arm switch module and the target lower bridge arm switch module to be turned on and off.
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公开(公告)号：US20210354593A1
公开(公告)日：2021-11-18
申请号：US17390873
申请日：2021-07-31
Applicant: Contemporary Amperex Technology Co., Limited
Inventor： Tiancong WANG , Xiyang I. ZUO , Zhimin DAN , Xiong ZHENG , Bao LI
IPC: B60L58/27 , H02J7/00 , H02P29/68 , H01M10/615 , H01M10/625 , H01M10/633 , H01M10/44
Abstract: The application provides a control system and method for a battery pack heating system. The control system includes: a battery management system configured to acquire a state parameter of a battery pack, and send heating request information to a vehicle controller when determining the state parameter of the battery pack meets a preset heating condition; a motor controller configured to send, to the vehicle controller, feedback information indicating that a motor of the battery pack heating system is in a non-operating state, when determining the motor is in the non-operating state, and control, in response to a first control signal, a target upper bridge arm switch module and a target lower bridge arm switch module to be periodically turned on or off; and the vehicle controller configured to send the first control signal to the motor controller in response to the heating request information and the feedback information.
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公开(公告)号：US20210293860A1
公开(公告)日：2021-09-23
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
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.
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