公开(公告)号：US12221001B2

公开(公告)日：2025-02-11

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 ,  H02J7/14 ,  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 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：US12080863B2

公开(公告)日：2024-09-03

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: H01M10/615 ,  B60L3/00 ,  B60L58/27 ,  H01M10/42 ,  H01M10/48 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6571

CPC classification number: H01M10/615 ,  B60L3/0046 ,  B60L58/27 ,  H01M10/425 ,  H01M10/486 ,  H01M10/613 ,  H01M10/625 ,  H01M10/6571 ,  B60L2240/545

Abstract: This application provides a vehicle and a power battery heating apparatus and method thereof. In the 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 to heat a coolant flowing through the power battery. A preset quadrature-axis current and a corresponding preset direct-axis current are obtained to control 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 small torque value is outputted at a motor shaft. The electromagnetic torque causes the motor output shaft to output a pre-tightening force to the transmission mechanism, thereby eliminating an engagement gap and effectively avoiding jitters of the vehicle.

公开(公告)号：US11916504B2

公开(公告)日：2024-02-27

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: H02P1/00 ,  H02P3/00 ,  H02P5/00 ,  H02P27/08 ,  B60L53/22 ,  B60L1/02 ,  H02M7/797 ,  H02P25/22

CPC classification number: H02P27/08 ,  B60L1/02 ,  B60L53/22 ,  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.

公开(公告)号：US11876197B2

公开(公告)日：2024-01-16

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 ,  H01M10/613 ,  H01M10/625 ,  H01M10/635 ,  H01M10/6567 ,  H01M10/663 ,  B60L58/27 ,  H02J7/00 ,  H01M10/48

CPC classification number: H01M10/615 ,  B60L58/27 ,  H01M10/48 ,  H01M10/486 ,  H01M10/613 ,  H01M10/625 ,  H01M10/635 ,  H01M10/6567 ,  H01M10/663 ,  H02J7/0047 ,  H02J7/007194 ,  H01M2220/20

Abstract: In a power battery heating method for a vehicle, 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.