公开(公告)号：US20220080858A1

公开(公告)日：2022-03-17

申请号：US17416884

申请日：2019-12-20

Applicant: BYD COMPANY LIMITED

Inventor： Yubo LIAN ,  Heping LING ,  Hua PAN ,  Yuxin ZHANG ,  Hao CHEN

IPC: B60L58/27 ,  B60L3/00

Abstract: This application 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, 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, so that electromagnetic torque with a relatively small torque value is outputted at a motor shaft. The electromagnetic torque cannot cause the vehicle to move, also cannot cause a damage to parts and components of a transmission mechanism of the vehicle. It only causes the motor output shaft to output a pre-tightening force to the transmission mechanism, thereby eliminating an engagement gap and effectively avoiding jitter of the vehicle.

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

IPC: H02P21/22 ,  H02P21/14 ,  H02P29/62 ,  B60H1/14

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.

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.

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

IPC: B60L53/24 ,  B60H1/00 ,  B60L58/26 ,  B60L58/27 ,  B60R16/033 ,  H02M7/797 ,  H02P25/22

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).

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.

公开(公告)号：US20220329195A1

公开(公告)日：2022-10-13

申请号：US17763962

申请日：2020-08-18

Applicant: BYD COMPANY LIMITED

Inventor： Heping LING ,  Jicheng LI ,  Changjiu LIU ,  Feiyue XIE ,  Yuxin ZHANG

IPC: H02P27/08 ,  B60L53/22 ,  B60L1/02 ,  H02M7/797 ,  H02P25/22

Abstract: An energy conversion device is provided. The energy conversion device includes a reversible pulse-width modulation (PWM) rectifier (102) and a motor coil (103). The motor coil (103) includes L sets of winding units, and each set of winding unit is connected with the reversible PWM rectifier (102), where L≥2 and is a positive integer. At least two sets of heating circuits of a to-be-heated device are formed by an external power supply (100), the reversible PWM rectifier (102), and the winding units in the motor coil (103). The energy conversion device controls the reversible PWM rectifier (102) according to a control signal, so that a current outputted from the external power supply (100) flows through at least two sets of winding units in the motor coil (103) to generate heat, and cause a vector sum of resultant current vectors of the at least two sets of the winding units on a quadrature axis of a synchronous rotating reference frame based on rotor field orientation of the motor to be zero.