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1. 发明申请

US20220348094A1 ENERGY CONVERSION APPARATUS AND VEHICLE 有权
公开(公告)号：US20220348094A1
公开(公告)日：2022-11-03
申请号：US17763916
申请日：2020-08-18
申请人： BYD COMPANY LIMITED
发明人： Hua PAN , Jicheng LI , Feiyue XIE , Yuxin ZHANG , Ning YANG
IPC分类号： B60L53/24 , B60H1/00 , B60L58/26 , B60L58/27 , B60R16/033 , H02M7/797 , H02P25/22
摘要： 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).

2. 发明申请

US20220077518A1 VEHICLE AND POWER BATTERY HEATING APPARATUS AND METHOD THEREOF 有权
公开(公告)号：US20220077518A1
公开(公告)日：2022-03-10
申请号：US17416781
申请日：2019-12-20
申请人： BYD COMPANY LIMITED
发明人： Heping LING , Hua PAN , Yuxin ZHANG , Guo TIAN , Zhao XIE
IPC分类号： H01M10/615 , H02J7/00 , B60L58/27 , H01M10/48 , H01M10/613 , H01M10/625 , H01M10/635 , H01M10/6567 , H01M10/663
摘要： 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.

3. 发明申请

US20220080858A1 VEHICLE AND POWER BATTERY HEATING APPARATUS AND METHOD THEREFOR 有权
公开(公告)号：US20220080858A1
公开(公告)日：2022-03-17
申请号：US17416884
申请日：2019-12-20
申请人： BYD COMPANY LIMITED
发明人： Yubo LIAN , Heping LING , Hua PAN , Yuxin ZHANG , Hao CHEN
IPC分类号： B60L58/27 , B60L3/00
摘要： 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.

4. 发明申请

US20220329195A1 ENERGY CONVERSION DEVICE AND VEHICLE 有权
公开(公告)号：US20220329195A1
公开(公告)日：2022-10-13
申请号：US17763962
申请日：2020-08-18
申请人： BYD COMPANY LIMITED
发明人： Heping LING , Jicheng LI , Changjiu LIU , Feiyue XIE , Yuxin ZHANG
IPC分类号： H02P27/08 , B60L53/22 , B60L1/02 , H02M7/797 , H02P25/22
摘要： 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.

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