阅读说明：本技术 一种车辆及其能量转换装置与动力系统 (Vehicle and energy conversion device and power system thereof ) 是由 滕景翠 刘宇 梁树林 王超 罗红斌 于 2019-06-30 设计创作，主要内容包括：本申请涉及电子技术领域,提供了一种车辆及其能量转换装置与动力系统。在本申请中,通过采用包括电机线圈、桥臂变换器和双向桥臂的集驱动和充电功能的能量转换装置,使得该能量转换装置可工作于驱动模式、直流充电模式以及交流充电模式,进而实现采用同一系统进行车辆的电机驱动和电池充电,尤其是采用同一电路拓扑便可实现直流充电和交流充电,元器件复用程度高,系统集成度高且结构简单,从而降低了系统成本,减小了系统体积,解决了现有的电机驱动与充电系统总体结构复杂、集成度低、体积大且成本高的问题。(The application relates to the technical field of electronics, and provides a vehicle, an energy conversion device and a power system thereof. In the application, the energy conversion device integrating the driving and charging functions and comprising the motor coil, the bridge arm converter and the bidirectional bridge arm is adopted, so that the energy conversion device can work in a driving mode, a direct current charging mode and an alternating current charging mode, further the motor driving and battery charging of a vehicle can be realized by adopting the same system, especially, the direct current charging and the alternating current charging can be realized by adopting the same circuit topology, the multiplexing degree of components is high, the system integration degree is high, the structure is simple, the system cost is reduced, the system volume is reduced, and the problems of complex overall structure, low integration degree, large volume and high cost of the existing motor driving and charging system are solved.)

1. An energy conversion device is characterized by comprising a motor coil, a bridge arm converter and a bidirectional bridge arm;

the bridge arm converter is respectively connected with the motor coil and the bidirectional bridge arm;

the motor coil, the bridge arm converter and the bidirectional bridge arm are all connected with an external charging port, and the bridge arm converter and the bidirectional bridge arm are all connected with an external battery;

the motor coil, the bridge arm converter and an external charging port form a direct current charging circuit to charge an external battery;

the motor coil, the bridge arm converter, the bidirectional bridge arm and an external charging port form an alternating current charging circuit to charge an external battery;

the motor coil, the bridge arm converter and an external battery form a motor driving circuit.

2. The energy conversion device of claim 1, wherein the motor coils comprise three-phase windings, each phase winding comprises N coil branches, first ends of the N coil branches in each phase winding are connected with the bridge arm converter after being connected in common, second ends of the N coil branches in each phase winding are connected with second ends of the N coil branches in the other two-phase windings in a one-to-one correspondence manner to form N neutral points, and the charging ports are connected with the M neutral points; wherein N is an integer greater than 1, and M is a positive integer less than N.

3. The energy conversion device of claim 2, wherein the value of N is 4.

4. The energy conversion device of claim 2, further comprising a neutral switch for controlling M of the N neutral points of the motor coil to be connected to the charging port.

5. The energy conversion device according to claim 1, further comprising a switch module having one end connected to the charging port and the other end connected to the motor coil, the bridge arm converter, and the bidirectional bridge arm, respectively.

6. The energy conversion device of claim 5, wherein the charging port comprises a direct current charging port and an alternating current charging port;

the switch module comprises a first switch unit and a second switch unit, and the direct current charging port, the first switch unit, the motor coil and the bridge arm converter form a direct current charging circuit or a direct current discharging circuit for the battery; the alternating current charging port, the second switch unit, the motor coil, the bridge arm converter and the bidirectional bridge arm form an alternating current charging circuit or an alternating current discharging circuit for the battery.

7. The energy conversion device according to claim 6, wherein the first switching unit includes a first switch and a second switch, and the second switching unit includes a third switch and a fourth switch;

one end of the first switch is connected with the direct current charging port, and the other end of the first switch is connected with the motor coil; one end of the second switch is connected with the direct current charging port, and the other end of the second switch is connected with the bridge arm converter;

one end of the third switch is connected with the alternating current charging port, the other end of the third switch is connected with the motor coil, one end of the fourth switch is connected with the alternating current charging port, and the other end of the fourth switch is connected with the bidirectional bridge arm.

8. The energy conversion device of claim 5, wherein the charging port comprises a AC/DC charging port, the switching module comprises a third switching unit, a fourth switching unit,

one end of the third switch unit is connected with the alternating current/direct current charging port, the other end of the third switch unit is connected with the motor coil, one end of the fourth switch unit is connected with the alternating current/direct current charging port, and the other end of the fourth switch unit is connected with the bridge arm converter or the bidirectional bridge arm;

when the fourth switch unit is connected with the bridge arm converter, the alternating current/direct current charging port, the third switch unit, the fourth switch unit, the motor coil and the bridge arm converter form a direct current charging circuit or a direct current discharging circuit for the battery;

when the fourth switch unit is connected with the bidirectional bridge arm, the alternating current/direct current charging port, the third switch unit, the fourth switch unit, the motor coil, the bridge arm converter and the bidirectional bridge arm form an alternating current charging circuit or an alternating current discharging circuit for the battery.

9. The energy conversion device according to claim 8, wherein the third switching unit includes a fifth switch, one end of which is connected to the ac/dc charging port and the other end of which is connected to the motor coil;

the fourth switch unit comprises a single-pole double-throw switch, the single-pole double-throw switch comprises a movable end and two immovable ends, the movable end is connected with the alternating current and direct current charging port, one immovable end is connected with the bridge arm converter, and the other immovable end is connected with the bidirectional bridge arm;

or the fourth switch unit comprises two switches, one end of one switch is connected with the alternating current/direct current charging port, and the other end of the switch is connected with the bridge arm converter; one end of the other switch is connected with the alternating current/direct current charging port, and the other end of the other switch is connected with the bidirectional bridge arm.

10. The energy conversion device according to any one of claims 1 to 9, further comprising a first capacitor connected in parallel with the bidirectional leg;

the alternating current charging circuit, the direct current charging circuit and the motor driving circuit share the first capacitor.

11. The energy conversion device according to claim 6 or 7, wherein the switch module further comprises a fifth switch unit, one end of the fifth switch unit is connected to the battery, and the other end of the fifth switch unit is connected to the bridge arm converter and the bidirectional bridge arm, respectively.

12. The energy conversion device according to claim 6 or 7, further comprising a bidirectional DC module, wherein the bidirectional DC module comprises a first DC terminal and a second DC terminal, the first DC terminal is connected to the bidirectional bridge arm, the switch module further comprises a sixth switch unit, one end of the sixth switch unit is connected to the second DC terminal, and the other end of the sixth switch unit is connected to the battery.

13. The energy conversion device of claim 12, wherein the bi-directional DC module further comprises a third DC terminal, the third DC terminal being connected to a battery or a vehicle outlet.

14. The energy conversion device according to claim 13, wherein the bidirectional DC module includes a first converter, a second converter, a third converter, and a transformation unit, a primary side, a first secondary side, and a second secondary side of the transformation unit are respectively connected to the first converter, the second converter, and the third converter, the first converter is connected in parallel to the bidirectional bridge arm, the second converter is connected in parallel to the battery, and the third converter is connected in parallel to the battery or the on-vehicle discharge port.

15. The energy conversion arrangement according to claim 14, wherein the third converter comprises a first sub-converter and a second sub-converter, both connected to the second secondary side of the voltage transformation unit.

16. The energy conversion device of claim 13, wherein the bi-directional DC module comprises a first DC/DC conversion circuit and a second DC/DC conversion circuit;

one end of the first DC/DC conversion circuit is connected with the bidirectional bridge arm, and the other end of the first DC/DC conversion circuit is connected with the sixth switch unit;

one end of the second DC/DC conversion circuit is connected with the bidirectional bridge arm, and the other end of the second DC/DC conversion circuit is connected with the storage battery.

17. The energy conversion device of claim 1, wherein the bridge arm converter comprises:

the three-phase bridge arm is formed by a first power switch unit and a second power switch unit which are connected in series, a third power switch unit and a fourth power switch unit which are connected in series, and a fifth power switch unit and a sixth power switch unit which are connected in series;

the first end of the first power switch unit, the first end of the third power switch unit and the first end of the fifth power switch unit are connected in common to form a positive end of the bridge arm converter, and the positive end of the bridge arm converter is connected with the positive end of the bidirectional bridge arm;

a second end of the second power switch unit, a second end of the fourth power switch unit and a second end of the sixth power switch unit are connected together to form a negative end of the bridge arm converter, and the negative end of the bridge arm converter is connected with the negative end of the bidirectional bridge arm;

the connection point of the second end of the first power switch unit and the first end of the second power switch unit is connected with the first phase coil of the motor coil, the connection point of the second end of the third power switch unit and the first end of the fourth power switch unit is connected with the second phase coil of the motor coil, and the connection point of the second end of the fifth power switch unit and the first end of the sixth power switch unit is connected with the third phase coil of the motor coil.

18. The energy conversion device according to claim 1, wherein the bidirectional leg comprises a seventh power switch unit and an eighth power switch unit connected in series; the first end of the seventh power switch unit is the positive end of the bidirectional bridge arm, the second end of the eighth power switch unit is the negative end of the bidirectional bridge arm, and a connection point of the second end of the seventh power switch unit and the first end of the eighth power switch unit is the midpoint of the bidirectional bridge arm.

19. The energy conversion device of claim 1, further comprising an inductor, one end of the inductor being connected to the charging port and the other end of the inductor being connected to the motor coil;

the charging port, the inductor, the motor coil and the bridge arm converter form a direct current charging circuit for the battery;

the charging port, the inductor, the motor coil, the bridge arm converter and the bidirectional bridge arm form an alternating current charging circuit for the battery.

20. The energy conversion device of claim 1, wherein the type of switches in the leg converter is different from the type of switches in the bidirectional leg.

21. A power system comprising the energy conversion device of any one of claims 1-20 and a control module, wherein the energy conversion device comprises:

a motor including a motor coil;

the motor control module comprises a bridge arm converter, the bridge arm converter is connected with one end of the motor coil, and the other end of the motor coil is connected with an external charging port; and the number of the first and second groups,

the vehicle-mounted charging module comprises a bidirectional bridge arm, the bidirectional bridge arm is connected with the bridge arm converter in parallel to form a first common end and a second common end, the first common end is connected with one end of an external battery, the second common end is connected with the other end of the battery, and the charging port is connected with the second common end and the bidirectional bridge arm;

the control module is used for controlling a charging port, the motor coil, the bridge arm converter to form a direct current charging circuit for an external battery, and is used for controlling the charging port, the motor coil, the bridge arm converter and the bidirectional bridge arm to form an alternating current charging circuit for the external battery; the motor driving circuit is used for controlling the motor coil, the bridge arm converter and an external battery to form; the direct current charging circuit, the alternating current charging circuit and the driving circuit share the motor coil and the bridge arm converter.

22. The power system of claim 21, wherein the energy conversion device further comprises a switch module, and the control module controls the switch module to switch the direct current charging mode, the alternating current charging mode and the driving mode;

in the direct-current charging mode, the charging port, the motor coil and the bridge arm converter form a direct-current charging circuit or a direct-current discharging circuit for the battery;

in the alternating current charging mode, the charging port, the motor coil, the bridge arm converter and the bidirectional bridge arm form an alternating current charging circuit or an alternating current discharging circuit for the battery;

in the driving mode, the motor coil, the bridge arm converter and the battery form a motor driving circuit.

23. The power system of claim 22, wherein the charging port comprises a direct current charging port and an alternating current charging port, and the switching module comprises a first switching unit and a second switching unit;

the control module controls the first switch unit to be connected and controls the second switch unit to be disconnected, and the direct-current charging port, the first switch unit, the motor coil and the bridge arm converter form a direct-current charging circuit for the battery so as to enter a direct-current charging mode;

the control module controls the first switch unit to be disconnected and controls the second switch unit to be connected, and the alternating current charging port, the second switch unit, the motor coil, the bridge arm converter and the bidirectional bridge arm form an alternating current charging circuit for the battery so as to enter an alternating current charging mode;

the control module controls the first switch unit and the second switch unit to be switched off, and the motor coil, the bridge arm converter and the battery form a motor driving circuit to enter a driving mode.

24. The powertrain system of claim 22, wherein the charging port comprises a ac/dc charging port, and the switch module comprises a third switch unit and a fourth switch unit;

the control module controls the third switch unit to be conducted and controls the fourth switch unit to be connected with the bridge arm converter, and the alternating current/direct current charging port, the third switch unit, the fourth switch unit, the motor coil and the bridge arm converter form a direct current charging circuit for the battery so as to enter a direct current charging mode;

the control module controls the third switch unit to be conducted and controls the fourth switch unit to be connected with a bidirectional bridge arm, and the alternating current/direct current charging port, the third switch unit, the fourth switch unit, the motor coil and the bridge arm converter form an alternating current charging circuit for the battery so as to enter an alternating current charging mode;

the control module controls the third switch unit and the fourth switch unit to be disconnected, and the motor coil, the bridge arm converter and the battery form a motor driving circuit to enter a driving mode.

25. The powertrain system of claim 21, wherein the energy conversion device further comprises a neutral switch;

the motor coil comprises three-phase windings, each phase winding comprises N coil branches, first ends of the N coil branches in each phase winding are connected with the bridge arm converter after being connected in common, second ends of the N coil branches in each phase winding are correspondingly connected with second ends of the N coil branches in other two-phase windings one by one to form N neutral points, and the charging port is connected with the M neutral points; wherein N is an integer greater than 1, and M is a positive integer less than N;

the control module controls the neutral point switch such that M neutral points of the N neutral points of the motor coil are connected to a charging port.

26. The powertrain system of claim 22, wherein the leg converter comprises a three-phase leg; when the energy conversion device works in the direct current charging mode, the control module sends a first control signal, a second control signal and a third control signal to the bridge arm converter, and the first control signal, the second control signal and the third control signal sequentially have a difference of a preset phase;

the control module controls the two power switch units of the first phase bridge arm to be alternately conducted according to the first control signal; the control module controls the two power switch units of the second phase bridge arm to be alternately conducted according to the second control signal; and the control module controls the two power switch units of the third phase bridge arm to be alternately conducted according to the third control signal so as to realize direct current charging.

27. The powertrain system of claim 22, wherein the leg converter comprises a three-phase leg; when the energy conversion device works in the alternating current charging mode, the control module sends a fourth control signal, a fifth control signal and a sixth control signal to the bridge arm converter, and the fourth control signal, the fifth control signal and the sixth control signal sequentially have a difference of a preset phase;

the control module controls the two power switch units of the bidirectional bridge arm to be alternately conducted according to the alternating current frequency; the control module controls the two power switch units of the first phase bridge arm to be alternately conducted according to the fourth control signal; the control module controls the two power switch units of the second phase bridge arm to be alternately conducted according to the fifth control signal; and the control module controls the two power switch units of the third phase bridge arm to be alternately conducted according to the sixth control signal so as to realize alternating current charging.

28. The powertrain system of claim 21, wherein the motor control module and the onboard charging module are integrated in a first housing.

29. The power system of claim 28, further comprising a speed reducer, wherein the speed reducer is in power coupling with the motor, and the speed reducer and the motor are integrated in a second housing.

30. The powertrain system of claim 28, wherein the bi-directional DC module of the energy conversion device is electrically connected to the on-board charging module and the battery, respectively, the bi-directional DC module being integrated in the first housing.

31. The power system of claim 28, wherein a capacitor of the energy conversion device is connected in parallel with the motor control module, the capacitor being integrated in the first tank.

32. The power system of claim 29, wherein the first case is fixedly coupled to the second case.

33. A vehicle characterised in that the vehicle comprises a power system according to any one of claims 21 to 32.

Technical Field

The application belongs to the technical field of electronics, and particularly relates to a vehicle, an energy conversion device and a power system.

Background

With the development and rapid popularization of electric vehicles, motor control and battery charging of electric vehicles become more and more important. At present, the motor drive and the battery charge of the existing electric automobile are separated independently, that is, the motor drive circuit and the battery charge circuit are two independent and unrelated circuits, the motor drive circuit is only used for motor drive and cannot be used for battery charge, and the battery charge circuit can only be used for battery charge and cannot be used for motor drive.

However, although the above method can effectively ensure normal operation of motor driving and battery charging of the vehicle, the above method has a complicated circuit structure, low integration, large volume and high cost because the motor driving circuit and the battery charging circuit are independent and unrelated to each other.

In summary, the prior art has the problems of complex overall circuit structure, low integration level, large volume and high cost of the motor driving and charging system.

Disclosure of Invention

The application aims to provide a vehicle, an energy conversion device and a power system, and aims to solve the problems that in the prior art, a motor driving and charging system is complex in overall structure, low in integration level, large in size and high in cost.

The energy conversion device comprises a motor coil, a bridge arm converter and a bidirectional bridge arm;

the bridge arm converter is respectively connected with the motor coil and the bidirectional bridge arm;

the motor coil, the bridge arm converter and the bidirectional bridge arm are all connected with an external charging port, and the bridge arm converter and the bidirectional bridge arm are all connected with an external battery;

the motor coil, the bridge arm converter and an external charging port form a direct current charging circuit to charge an external battery;

the motor coil, the bridge arm converter, the bidirectional bridge arm and an external charging port form an alternating current charging circuit to charge an external battery;

the motor coil, the bridge arm converter and an external battery form a motor driving circuit.

Another object of the present application is to provide a power system, which includes the above energy conversion device and a control module, wherein the energy conversion device includes:

a motor including a motor coil;

the motor control module comprises a bridge arm converter, the bridge arm converter is connected with one end of the motor coil, and the other end of the motor coil is connected with an external charging port; and the number of the first and second groups,

the vehicle-mounted charging module comprises a bidirectional bridge arm, the bidirectional bridge arm is connected with the bridge arm converter in parallel to form a first common end and a second common end, the first common end is connected with one end of an external battery, the second common end is connected with the other end of the battery, and the charging port is connected with the second common end and the bidirectional bridge arm;

the control module is used for controlling a charging port, the motor coil, the bridge arm converter to form a direct current charging circuit for an external battery, and is used for controlling the charging port, the motor coil, the bridge arm converter and the bidirectional bridge arm to form an alternating current charging circuit for the external battery; the motor driving circuit is used for controlling the motor coil, the bridge arm converter and an external battery to form; the direct current charging circuit, the alternating current charging circuit and the driving circuit share the motor coil and the bridge arm converter.

It is another object of the present application to provide a vehicle including the powertrain described above.

In the application, the energy conversion device integrating the driving and charging functions and comprising the motor coil, the bridge arm converter and the bidirectional bridge arm is adopted, so that the energy conversion device can work in a driving mode, a direct current charging mode and an alternating current charging mode, further the motor driving and battery charging of a vehicle can be realized by adopting the same system, especially, the direct current charging and the alternating current charging can be realized by adopting the same circuit topology, the multiplexing degree of components is high, the system integration degree is high, the structure is simple, the system cost is reduced, the system volume is reduced, and the problems of complex overall structure, low integration degree, large volume and high cost of the existing motor driving and charging system are solved.

Drawings

Fig. 1 is a schematic block diagram of an energy conversion device according to a first embodiment of the present application;

fig. 2 is a schematic circuit diagram of an energy conversion device according to a first embodiment of the present application;

fig. 3 is a schematic circuit diagram of an energy conversion device according to a second embodiment of the present application;

fig. 4 is a schematic block diagram of an energy conversion device according to a second embodiment of the present application;

fig. 5 is a schematic block diagram of an energy conversion device according to a third embodiment of the present application;

fig. 6 is a schematic circuit diagram of an energy conversion device according to a third embodiment of the present application;

fig. 7 is a schematic circuit diagram of an energy conversion device according to a third embodiment of the present application;

fig. 8 is a schematic circuit diagram of an energy conversion device according to a fourth embodiment of the present application;

fig. 9 is a schematic block diagram of an energy conversion device according to a fifth embodiment of the present application;

fig. 10 is a schematic circuit diagram of an energy conversion device according to a fifth embodiment of the present application;

fig. 11 is a schematic circuit diagram of an energy conversion device according to a fifth embodiment of the present application;

fig. 12 is a schematic block diagram of an energy conversion device according to a sixth embodiment of the present application;

fig. 13 is a schematic block diagram of an energy conversion device according to a seventh embodiment of the present application;

fig. 14 is a schematic circuit diagram of an energy conversion device according to a seventh embodiment of the present application;

fig. 15 is a schematic block diagram of an energy conversion device according to an eighth embodiment of the present application;

fig. 16 is a schematic block diagram of an energy conversion device according to a ninth embodiment of the present application;

fig. 17 is a schematic circuit diagram of an energy conversion device according to a ninth embodiment of the present application;

fig. 18 is a timing chart illustrating an operation of an energy conversion apparatus according to a ninth embodiment of the present application;

FIG. 19 is a schematic block diagram of a powertrain provided in a tenth embodiment of the present application;

FIG. 20 is a schematic block diagram of a powertrain provided in an eleventh embodiment of the present application;

fig. 21 is a schematic structural diagram of a power system provided in a twelfth embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Implementations of the present application are described in detail below with reference to the following detailed drawings:

fig. 1 shows a module structure of an energy conversion device provided in a first embodiment of the present application, and for convenience of description, only the parts related to the present embodiment are shown, and detailed description is as follows:

as shown in fig. 1, the energy conversion device provided by the embodiment of the present application includes a motor coil 11, a bridge arm converter 12, and a bidirectional bridge arm 13.

The bridge arm converter 12 is respectively connected with the motor coil 11 and the bidirectional bridge arm 13; motor coil 11, arm converter 12, and bidirectional arm 13 are all connected to external charging port 10, and arm converter 12 and bidirectional arm 13 are all connected to external battery 200.

Specifically, the motor coil 11, the bridge arm inverter 12 and the external charging port 10 form a dc charging circuit to charge the external battery 200;

the motor coil 11, the bridge arm converter 12, the bidirectional bridge arm 13 and the external charging port 10 form an alternating current charging circuit to charge the external battery 200;

motor coil 11, arm inverter 12, and external battery 200 form a motor drive circuit.