公开(公告)号：EP4033630A1

公开(公告)日：2022-07-27

申请号：EP20867753.4

申请日：2020-08-18

Applicant: BYD Company Limited

Inventor： PAN, Hua ,  LI, Jicheng ,  XIE, Feiyue ,  ZHANG, Yuxin ,  YANG, Ning

IPC: H02J7/00 ,  B60R16/03 ,  H02P27/06

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 battery (2) and a second end of the battery (2) respectively, and a second end of the first DC charging and discharging port (3) is connected with the second end of the battery (2).

公开(公告)号：EP4415255A2

公开(公告)日：2024-08-14

申请号：EP24185479.3

申请日：2019-12-20

Applicant: BYD Company Limited

Inventor： LING, Heping ,  PAN, Hua ,  ZHANG, Yuxin ,  TIAN, Guo ,  XIE, Zhao

IPC: H02P29/66

CPC classification number: H01M10/625 ,  H01M10/615 ,  B60L58/27 ,  Y02T90/40 ,  Y02T10/70 ,  Y02E60/10 ,  Y02T10/72 ,  H01M2220/2020130101 ,  H01M10/633 ,  H01M10/667 ,  H01M10/6568 ,  B60L15/025 ,  B60L15/20 ,  B60L2210/4220130101 ,  B60L2210/4420130101 ,  B60L2240/42120130101 ,  B60L2240/42320130101 ,  B60L2240/42520130101 ,  B60L2240/42920130101 ,  B60L2240/52520130101 ,  B60L2240/52920130101 ,  B60L2240/54520130101 ,  B60L2240/66220130101 ,  B60L2240/8020130101 ,  B60L2260/2220130101 ,  H02P25/20 ,  H02P29/62 ,  H02P29/024 ,  H02P29/66 ,  Y02T10/64 ,  Y02T90/16 ,  H01M10/486 ,  H01M10/48

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 (20) is lower than a preset temperature value, and a heating condition of the power battery (20) meets a preset condition, a three-phase inverter (11) is controlled to cause a three-phase alternating current motor (12) to generate heat according to heating energy, to heat a coolant flowing through the power battery (20), 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 (20), so as to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter (11) to adjust a phase current of the three-phase alternating current motor (12) 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：EP4299360A1

公开(公告)日：2024-01-03

申请号：EP21938885.7

申请日：2021-10-19

Applicant: BYD Company Limited

Inventor： LIAN, Yubo ,  LING, Heping ,  PAN, Hua ,  ZHANG, Yuxin ,  XIE, Zhao

IPC: B60L15/20

Abstract: Provided are an electric drive system control method, an electric drive system, and a vehicle, relating to the technical field of vehicles. The method includes the following steps. That the vehicle is in a traveling condition is determined according to a vehicle state parameter. In response to a vehicle heat-up demand signal, a rotation speed value, a shaft end torque value, a present direct axis current value, and a present quadrature axis current value of a motor are obtained. A target torque curve is determined according to the shaft end torque value. A target traveling heating calibration curve is determined according to the vehicle heat-up demand and the rotation speed value. An intersection of the target torque curve and the target traveling heating calibration curve is used as a target traveling condition point. A target quadrature axis current value and a target direct axis current value are determined according to the target traveling condition point. A synthetic current vector amplitude value of the target quadrature axis current value and the target direct axis current value is greater than a synthetic current vector amplitude value of the present quadrature axis current value and the present direct axis current value. According to the target direct axis current value and the target quadrature axis current value, the motor is controlled to operate.

公开(公告)号：EP4043254A1

公开(公告)日：2022-08-17

申请号：EP20867338.4

申请日：2020-08-18

Applicant: BYD Company Limited

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

IPC: B60H1/02 ,  B60L15/20 ,  B60L58/27

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 windings 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 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 is zero.

公开(公告)号：EP4415255A3

公开(公告)日：2024-11-20

申请号：EP24185479.3

申请日：2019-12-20

Applicant: BYD Company Limited

Inventor： LING, Heping ,  PAN, Hua ,  ZHANG, Yuxin ,  TIAN, Guo ,  XIE, Zhao

IPC: B60L58/27 ,  B60L15/02 ,  B60L15/20 ,  H02P21/00 ,  H01M10/615 ,  B60L58/34 ,  H01M10/625 ,  H01M10/633 ,  H01M10/6568 ,  H01M10/667 ,  H01M10/48 ,  H02P25/20 ,  H02P29/024 ,  H02P29/62 ,  H02P29/66

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 (20) is lower than a preset temperature value, and a heating condition of the power battery (20) meets a preset condition, a three-phase inverter (11) is controlled to cause a three-phase alternating current motor (12) to generate heat according to heating energy, to heat a coolant flowing through the power battery (20), 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 (20), so as to control, according to the preset direct-axis current and the preset quadrature-axis current, the three-phase inverter (11) to adjust a phase current of the three-phase alternating current motor (12) 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：EP4253125A1

公开(公告)日：2023-10-04

申请号：EP21934472.8

申请日：2021-10-19

Applicant: BYD Company Limited

Inventor： LING, Heping ,  PAN, Hua ,  ZHANG, Yuxin ,  QIU, Guowei ,  HONG, Chen

IPC: B60L15/20

Abstract: The present invention relates to the technical field of vehicles, and provides a control method for an electric drive system of a vehicle, an electric drive system, and a vehicle. The method includes: acquiring a current heat generation power of an electric drive system according to a current operating point of a vehicle; determining a current adjustment amplitude according to a required heating power of the vehicle and the current heat generation power; acquiring a current direct axis current value and a current quadrature axis current value of the electric motor at the current operating point of the vehicle according to a three-phase current value and a position value of the electric motor; controlling the current direct axis current value to oscillate at a preset change frequency and the current adjustment amplitude and taking the current value as a target direct axis current value; and acquiring a target quadrature axis current value according to the target direct axis current value and the shaft torque of the electric motor; acquiring an electric motor drive signal according to the target direct axis current value, the target quadrature axis current value, the current direct axis current value, and the current quadrature axis current value; and sending the electric motor drive signal to an electric motor controller, to control the operation of the electric motor.

公开(公告)号：EP3900977A1

公开(公告)日：2021-10-27

申请号：EP19899570.6

申请日：2019-12-20

Applicant: BYD Company Limited

Inventor： LING, Heping ,  PAN, Hua ,  ZHANG, Yuxin ,  TIAN, Guo ,  XIE, Zhao

IPC: B60L58/27

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, 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：EP3895933A1

公开(公告)日：2021-10-20

申请号：EP19901114.9

申请日：2019-12-20

Applicant: BYD Company Limited

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

IPC: B60L58/27

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.