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公开(公告)号：US20220289053A1
公开(公告)日：2022-09-15
申请号：US17635620
申请日：2020-08-13
Applicant: BYD COMPANY LIMITED
Inventor： Yubo LIAN , Heping LING , Jicheng LI , Hua PAN , Feiyue XIE
Abstract: The present invention relates to the technical field of vehicles, and provides an energy conversion device and a vehicle. The energy conversion device includes a reversible pulse-width modulation (PWM) rectifier, a motor coil connected with the reversible PWM rectifier, a one-way conduction module, and a capacitor. A DC charging circuit or a DC discharging circuit is formed by an external DC port with an external battery by using the energy conversion device, and a driving circuit is formed by the external battery with the reversible PWM rectifier and the motor coil in the energy conversion device. The one-way conduction module is connected between a first end of the capacitor and a second end of the external DC port, or the one-way conduction module is connected between a second end of the capacitor and a first end of the external DC port.
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2.发明公开公开(公告)号：US20230344375A1
公开(公告)日：2023-10-26
申请号：US18215725
申请日：2023-06-28
Applicant: BYD COMPANY LIMITED
Inventor： Heping LING , Hua PAN , Yuxin ZHANG , Guowei QIU , Chen HONG
CPC classification number: H02P21/22 , H02P21/14 , H02P29/62 , B60H1/143 , B60L2240/423 , B60L2240/425 , B60L2240/429 , B60L2240/427 , B60L15/20
Abstract: A control method for an electric drive system of a vehicle, includes: acquiring a shaft torque of the electric motor and a present operating point of the vehicle in response to a vehicle heating demand signal; acquiring a present heat generation power of the electric drive system accordingly; determining a current adjustment amplitude accordingly; acquiring a three-phase current value and a position value of the electric motor, and a present direct axis current value and a present quadrature axis current value of the electric motor at the present operating point accordingly; controlling the present direct axis current value to oscillate at a change frequency and the current adjustment amplitude to obtain a target direct axis current value; acquiring a target quadrature axis current value accordingly; acquiring an electric motor drive signal accordingly.
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公开(公告)号：US20220077709A1
公开(公告)日：2022-03-10
申请号：US17416745
申请日：2019-12-17
Applicant: BYD COMPANY LIMITED
Inventor： Changjiu LIU , Hua PAN , Ronghua NING , Yang LIU , Ning YANG
Abstract: The present disclosure provides a power battery charging method, a motor control circuit, and a vehicle. The motor control circuit includes a first switch module, a three-phase inverter, and a control module, where a power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop, the three-phase alternating current motor inputs or outputs a current by using a wire N extending from a connection point of three phase coils, and the control module controls the three-phase inverter, so that the motor control circuit receives a voltage of the power supply module and outputs a direct current. In the technical solutions, a wire N extends from the three-phase alternating current motor, and further forms different charging loops with the three-phase inverter, the three-phase alternating current motor, and the power battery. When it is detected that the voltage of the power supply module is not higher than a voltage of the power battery, the original three-phase inverter and three-phase alternating current motor are adopted to boost the voltage of the power supply module before the power battery is charged, and in this way, no extra external boost circuit needs to be added, which reduces costs of the additional circuit.
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4.发明公开公开(公告)号：US20240223118A1
公开(公告)日：2024-07-04
申请号：US18606204
申请日：2024-03-15
Applicant: BYD COMPANY LIMITED
Inventor： Yubo LIAN , Heping LING , Hua PAN , Feiyue XIE , Lijun ZHANG
CPC classification number: H02P27/085 , H02J7/0063 , H02P29/62 , H02J2207/20
Abstract: A motor drive apparatus includes a three-phase inverter and a three-phase motor. A first terminal of the three-phase inverter is connected to a positive electrode of a power battery. A second terminal of the three-phase inverter is connected to a negative electrode of the power battery Three phase coils of the three-phase motor are respectively connected to midpoints of three phase legs of the three-phase inverter. The motor drive apparatus is configured to simultaneously control (i) a process of charging the power battery by a power supply module, (ii) a torque of the three-phase motor at a zero output, and (iii) the three-phase inverter and the three-phase motor to heat a heat exchange medium flowing through at least one of the three-phase inverter or the three-phase motor.
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公开(公告)号：US20240072562A1
公开(公告)日：2024-02-29
申请号：US18505826
申请日：2023-11-09
Applicant: BYD COMPANY LIMITED
Inventor： Changjiu LIU , Hua PAN , Ronghua NING , Yang LIU , Ning YANG
CPC classification number: H02J7/007182 , H02J7/04 , H02P27/08 , B60L50/51
Abstract: A motor control circuit includes a first switch module, a three-phase inverter, and a control module. A power supply module, the first switch module, the three-phase inverter, and a three-phase alternating current motor form a current loop; midpoints of three phase legs of the three-phase inverter are respectively connected to three phase coils of the three-phase alternating current motor; the three-phase alternating current motor is configured to input or output a current by using a wire N extending from a connection point of the three phase coils; the control module is connected to the three-phase inverter, first switch module, three-phase alternating current motor, and power supply module; the control module is configured to control the three-phase inverter to enable the motor control circuit to receive a voltage of the power supply module and output a direct current, and to boost a voltage of the power supply module.
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Patent Agency Ranking
公开(公告)号：US20230038790A1
公开(公告)日：2023-02-09
申请号：US17790398
申请日：2020-12-10
Applicant: BYD COMPANY LIMITED
Inventor： Heping LING , Hua PAN , Feiyue XIE , Ri HUANG , Yihao ZHENG
IPC: B60L58/27 , H02P27/08 , H02J7/00 , H01M10/42 , H01M10/44 , H01M10/615 , H01M10/625 , H01M10/63
Abstract: The present disclosure relates to the technical field of vehicles, and provides a vehicle and an energy conversion device and a control method therefor. The energy conversion device includes a motor controller, a bus capacitor, a first switch module, a motor, and a second switch module. By controlling the first switch module and the second switch module to be turned on/off, a motor driving circuit can be formed by a battery pack, the first switch module, the bus capacitor, the motor controller, and the motor, and a charging and discharging circuit can be formed by the battery pack, the second switch module, the motor, the motor controller, and the bus capacitor.
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公开(公告)号：US20240042868A1
公开(公告)日：2024-02-08
申请号：US18382261
申请日：2023-10-20
Applicant: BYD COMPANY LIMITED
Inventor： Yubo LIAN , Heping LING , Hua PAN , Yuxin ZHANG , Zhao XIE
IPC: B60L15/20
CPC classification number: B60L15/20 , B60L2240/425 , B60L2240/423
Abstract: A method for controlling an electric drive system, includes: determining that the vehicle is in a traveling condition; obtaining a rotation speed value, a shaft end torque value, a present direct axis current value, and a present quadrature axis current value of the motor when receiving a vehicle heat-up demand signal; determining a target torque curve according to the shaft end torque value, and determining a target traveling heating calibration curve according to the vehicle heat-up demand signal and the rotation speed value; determining an intersection of the target torque curve and the target traveling heating calibration curve as a target traveling condition point; determining a target quadrature axis current value and a target direct axis current value according to the target traveling condition point; and controlling, according to the target direct axis current value and the target quadrature axis current value, the motor to operate.
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公开(公告)号：US20220348094A1
公开(公告)日：2022-11-03
申请号：US17763916
申请日：2020-08-18
Applicant: BYD COMPANY LIMITED
Inventor： Hua PAN , Jicheng LI , Feiyue XIE , Yuxin ZHANG , Ning YANG
Abstract: An energy conversion device is provided. The device includes: a reversible pulse width modulation (PWM) rectifier (11) and a motor coil (12), where the motor coil (12) includes at least a first winding unit and a second winding unit, and the first winding unit and the second winding unit are both connected with the reversible PWM rectifier (11). The first winding unit is connected with at least one of neutral lines in the second winding unit, where at least one neutral line of at least one of the winding units is connected with a first end of a first direct current (DC) charging and discharging port (3), the reversible PWM rectifier (11) is connected with a first end of a external battery (2) and a second end of the external battery (2) respectively, and a second end of the first DC charging and discharging port (3) is connected with the second end of the external battery (2).
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公开(公告)号：US20220077518A1
公开(公告)日：2022-03-10
申请号：US17416781
申请日：2019-12-20
Applicant: BYD COMPANY LIMITED
Inventor： Heping LING , Hua PAN , Yuxin ZHANG , Guo TIAN , Zhao XIE
IPC: H01M10/615 , H02J7/00 , B60L58/27 , H01M10/48 , H01M10/613 , H01M10/625 , H01M10/635 , H01M10/6567 , H01M10/663
Abstract: The present disclosure provides a vehicle and a power battery heating apparatus and method thereof. In the power battery heating method, when a current temperature value of a power battery is lower than a preset temperature value, and a heating condition of the power battery meets a preset condition, a three-phase inverter is controlled to cause a three-phase alternating current motor to generate heat according to heating energy, to heat a coolant flowing through the power battery, a preset quadrature-axis current that causes a torque value outputted by the motor to be an appropriate value is obtained, and a corresponding preset direct-axis current is obtained according to heating power of the power battery, so as to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter to adjust a phase current of the three-phase alternating current motor in the heating process, where a direction of the preset direct-axis current changes periodically in the heating process, thereby making quantities of times of switching-on and switching-off of an upper leg and a lower leg of power switching devices of the same phase equal, and service life of devices balanced.
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公开(公告)号：US20230238603A1
公开(公告)日：2023-07-27
申请号：US18008091
申请日：2021-06-04
Applicant: BYD COMPANY LIMITED
Inventor： Yubo LIAN , Heping LING , Hua PAN , Lei YAN , Feiyue XIE
IPC: H01M10/637 , B60L53/24 , B60L58/27 , H02P27/06 , H01M10/44
CPC classification number: H01M10/637 , B60L53/24 , B60L58/27 , H02P27/06 , H01M10/44
Abstract: The present disclosure relates to a battery energy processing device and method and a vehicle. The battery energy processing device includes: a bridge arm converter, having a first bus terminal connected with a positive electrode of a battery and a second bus terminal connected with a negative electrode of the battery; a motor winding, having a first end connected with a midpoint of the bridge arm converter; an energy storage device, respectively connected with a second end of the motor winding and the second bus terminal; and a controller, configured to control, in a first preset state, the bridge arm converter to charge and discharge the battery, so as to realize heating of the battery. In this way, the charging and discharging of the battery can be controlled, and internal resistance of the battery causes the battery to generate a large amount of heat, which causes a temperature rise of the battery, thereby realizing the heating of the battery.
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