阅读说明：本技术 能量转换装置、动力系统及车辆 (Energy conversion device, power system and vehicle ) 是由 滕景翠 梁树林 刘宇 王超 于 2019-06-30 设计创作，主要内容包括：本发明涉及电子技术领域,提供一种能量转换装置、动力系统及车辆,能量转换装置包括：电感,其一端与外部充电口连接；桥臂变换器,其连接在外部电池和外部充电口之间,桥臂变换器包括并联的第一相桥臂、第二相桥臂、第三相桥臂,电感的另一端与第一相桥臂连接；变压单元,其输入端分别与第二相桥臂和第三相桥臂连接；以及,第一双向H桥,其连接在变压单元的输出端与外部电池之间。通过本发明的实施,车辆的电机驱动电路和电池充电电路复用桥臂变换器,提高电路集成度,从而降低了电路成本,减小了电路体积,解决了现有的电机驱动与充电系统总体电路集成度低、体积大且成本高的问题。(The invention relates to the technical field of electronics, and provides an energy conversion device, a power system and a vehicle, wherein the energy conversion device comprises: an inductor, one end of which is connected with an external charging port; the bridge arm converter is connected between an external battery and an external charging port and comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm which are connected in parallel, and the other end of the inductor is connected with the first-phase bridge arm; the input end of the voltage transformation unit is respectively connected with the second phase bridge arm and the third phase bridge arm; and a first bidirectional H-bridge connected between the output terminal of the transforming unit and the external battery. Through the implementation of the invention, the motor driving circuit and the battery charging circuit of the vehicle multiplex the bridge arm converter, and the circuit integration level is improved, thereby reducing the circuit cost, reducing the circuit volume and solving the problems of low overall circuit integration level, large volume and high cost of the existing motor driving and charging system.)

1. An energy conversion device, comprising:

an inductor, one end of which is connected with an external charging port;

the bridge arm converter is connected between an external battery and the external charging port and comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm which are connected in parallel, and the other end of the inductor is connected with the first-phase bridge arm;

the input end of the voltage transformation unit is respectively connected with the second phase bridge arm and the third phase bridge arm; and the number of the first and second groups,

a first bidirectional H-bridge connected between an output terminal of the voltage transforming unit and the external battery;

the external battery is connected with an external motor through the bridge arm converter, and the external charging port is connected with the external battery through the inductor, the bridge arm converter, the voltage transformation unit and the first bidirectional H bridge;

the external battery drives the external motor through an energy conversion device, the external charging port is externally connected with a power supply, and the external battery is charged through the energy conversion device.

2. The energy conversion apparatus according to claim 1, wherein the external battery, the bridge arm inverter, and the external motor form a drive circuit that drives the external motor; the external charging port, the inductor, the bridge arm converter, the voltage transformation unit and the first bidirectional H-bridge form a charging circuit for charging the external battery; the driving circuit and the charging circuit multiplex the bridge arm converter.

3. The energy conversion device of claim 1, wherein the first phase leg comprises a first power switch and a second power switch connected in series, a first midpoint of the first power switch and the second power switch being connected to the inductor;

the second phase bridge arm comprises a third power switch and a fourth power switch which are connected in series, and second middle points of the third power switch and the fourth power switch are connected with the transformation unit;

the third phase bridge arm comprises a fifth power switch and a sixth power switch which are connected in series, and third middle points of the fifth power switch and the sixth power switch are connected with the transformation unit;

a first end of the first power switch, a first end of the third power switch and a first end of the fifth power switch are connected in common to form a first bus end of the bridge arm converter; a second end of the second power switch, a second end of the fourth power switch, and a second end of the sixth power switch are connected in common to form a second bus end of the bridge arm converter, and the second bus end is connected to the external charging port; the first junction end is connected with one end of the external battery, and the second junction end is connected with the other end of the external battery;

the external motor comprises a motor coil, the first midpoint is connected with a first phase coil of the motor coil, the second midpoint is connected with a second phase coil of the motor coil, and the third midpoint is connected with a third phase coil of the motor coil.

4. The energy conversion device of claim 3, further comprising:

a first capacitor connected between the first bus terminal and the second bus terminal.

5. The energy conversion device of claim 3, wherein the voltage transforming unit comprises:

a primary coil having one end connected to the second midpoint and the other end connected to the third midpoint;

a first secondary coil connected with the first bidirectional H-bridge.

6. The energy conversion device of claim 5, wherein the voltage transforming unit comprises:

and the second secondary coil is connected with the storage battery or the vehicle-mounted discharge port through a second bidirectional H bridge.

7. The energy conversion device of claim 5, wherein a first inductance is disposed between the primary winding and the second midpoint and a second capacitance is disposed between the primary winding and the third midpoint.

8. The energy conversion device of claim 5, wherein the first bidirectional H-bridge comprises:

a seventh phase bridge arm comprising a seventh power switch and an eighth power switch connected in series, wherein fourth midpoints of the seventh power switch and the eighth power switch are connected with one end of the first secondary coil;

the eighth-phase bridge arm comprises a ninth power switch and a tenth power switch which are connected in series, and fifth midpoints of the ninth power switch and the tenth power switch are connected with the other end of the first secondary coil;

a first end of the seventh power switch and a first end of the ninth power switch are connected in common to form a third bus end of the first bidirectional H bridge; a second end of the eighth power switch and a second end of the tenth power switch are connected in common to form a fourth bus end of the first bidirectional H-bridge; the third bus end is connected with one end of the external battery, and the fourth bus end is connected with the other end of the external battery.

9. The energy conversion device of claim 8, wherein a second inductor is disposed between the first secondary winding and the fourth midpoint, and a third capacitor is disposed between the first secondary winding and the fifth midpoint.

10. The energy conversion device of claim 8, further comprising:

a fourth capacitor connected between the third bus terminal and the fourth bus terminal.

11. The energy conversion device of claim 1, wherein the external charging port is an ac charging port, the energy conversion device further comprising:

the first rectifying module is respectively connected with the alternating current charging port, the inductor and the bridge arm converter;

the alternating current charging port, the first rectifying module, the inductor, the bridge arm converter, the voltage transformation unit, the first bidirectional H bridge and the external battery form an alternating current charging circuit or an alternating current discharging circuit.

12. The energy conversion device of claim 1, wherein the external charging port is an ac charging port and a dc charging port, the energy conversion device further comprising:

the second rectifying module is respectively connected with the alternating current charging port, the inductor and the bridge arm converter; the direct current charging port is respectively connected with the inductor and the bridge arm converter;

the alternating current charging port, the second rectifying module, the inductor, the bridge arm converter, the transformation unit, the first bidirectional H bridge and the external battery form an alternating current charging circuit or an alternating current discharging circuit;

the direct current charging port, the inductor, the bridge arm converter, the transformation unit, the first bidirectional H bridge and the external battery form a direct current charging circuit or a direct current discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging or discharging circuit.

13. The energy conversion device of claim 1, wherein the external charging port is an ac charging port and a dc charging port, the energy conversion device further comprising:

a bidirectional bridge arm connected to the ac charging port and the bridge arm converter, respectively;

the direct current charging port is respectively connected with the inductor and the bridge arm converter;

the alternating current charging port, the inductor, the bridge arm converter, the bidirectional bridge arm, the transformation unit, the first bidirectional H bridge and the external battery form an alternating current charging circuit or an alternating current discharging circuit;

the direct current charging port, the inductor, the bridge arm converter, the transformation unit, the first bidirectional H bridge and the external battery form a direct current charging circuit or a direct current discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging circuit or a direct current discharging circuit.

14. The energy conversion device of claim 13, further comprising: the bidirectional bridge arm includes:

and the sixth middle points of the eleventh power switch and the twelfth power switch are connected with the external charging port, the first end of the eleventh power switch is connected with the first bus end of the bridge arm converter, and the second end of the twelfth power switch is connected with the second bus end of the bridge arm converter.

15. A power system comprising the energy conversion device of any one of claims 1-14 and a control module, wherein the energy conversion device comprises:

the vehicle-mounted charging module comprises an inductor, and the inductor is connected with an external charging port;

the motor control module comprises a bridge arm converter, and the bridge arm converter is respectively connected with the external charging port, the inductor, an external motor and an external battery;

the bidirectional DC/DC module comprises a transformation unit and a first bidirectional H bridge, wherein one end of the transformation unit is connected with the bridge arm converter, the other end of the transformation unit is connected with one end of the first bidirectional H bridge, and the other end of the first bidirectional H bridge is connected with the external battery;

the external battery is connected with the motor through the bridge arm converter, and the external charging port is connected with the external battery through the inductor, the bridge arm converter, the voltage transformation unit and the first bidirectional H bridge;

the control module is used for controlling the energy conversion device to drive the external motor, and when the external charging port is externally connected with a power supply, the control module is also used for controlling the energy conversion device to charge the external battery.

16. The power system of claim 15, wherein the energy conversion device further comprises a switch module, and the control module is configured to control the switch module to switch between the dc charging mode and the driving mode;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the external charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the external charging port, the inductor, the first phase bridge arm of the bridge arm converter and the external battery form a direct current charging circuit or a direct current discharging circuit.

17. The powertrain system of claim 15, wherein the external charging port is an ac charging port, and the energy conversion device further comprises a first rectifier module, and the first rectifier module is connected to the ac charging port, the inductor, and the bridge arm converter, respectively;

the control module is used for controlling the switch module to realize the switching between an alternating current charging mode and a driving mode;

in the ac charging mode, the control module is configured to control an ac charging circuit or an ac discharging circuit formed by the ac charging port, the first rectifying module, the inductor, the bridge arm converter, the voltage transforming unit, the first bidirectional H-bridge, and the external battery;

in the driving mode, the external battery, the bridge arm inverter, and the external motor form a driving circuit.

18. The powertrain system of claim 15, wherein the external charging ports are an ac charging port and a dc charging port, and the energy conversion device further comprises a second rectifying module, and the second rectifying module is respectively connected to the ac charging port, the inductor, and the bridge arm converter; the direct current charging port is respectively connected with the inductor and the bridge arm converter;

the control module is used for controlling the switch module to realize the switching of an alternating current charging mode, a direct current charging mode and a driving mode;

in the ac charging mode, the control module is configured to control an ac charging circuit or an ac discharging circuit formed by the ac charging port, the second rectifying module, the inductor, the bridge arm converter, the voltage transforming unit, the first bidirectional H-bridge, and the external battery;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the dc charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging circuit or a direct current discharging circuit.

19. The powertrain system of claim 15, wherein the energy conversion device further comprises a bidirectional bridge arm, the bidirectional bridge arm being connected to the external charging port and the bridge arm converter, respectively;

the control module is used for controlling the switch module to realize the switching of an alternating current charging mode, a direct current charging mode and a driving mode;

in the alternating current charging mode, the control module is used for controlling an alternating current charging circuit or an alternating current discharging circuit formed by the alternating current charging port, the inductor, the bridge arm converter, the bidirectional bridge arm, the voltage transformation unit, the first bidirectional H bridge and the external battery;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the dc charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging circuit or a direct current discharging circuit.

20. The powertrain system of claim 15, wherein the on-board charging module, motor control module, and the bi-directional DC/DC module are integrated in a first housing.

21. The power system of claim 20, further comprising:

a speed reducer dynamically coupled with the external motor, the speed reducer and the external motor being integrated in a second case.

22. The power system of claim 21, further comprising: and a first capacitor of the energy conversion device is connected with the external motor control module in parallel, and the first capacitor is integrated in the first box body.

23. The power system of claim 22, wherein the first case is fixedly coupled to the second case.

24. An energy conversion device, comprising:

the charging connection end group comprises a first charging connection end and a second charging connection end;

the bridge arm converter comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm, wherein the first-phase bridge arm, the second-phase bridge arm and the third-phase bridge arm are connected in parallel to form a first bus end and a second bus end, and the second bus end is connected with the second charging connecting end;

one end of the inductor is connected with the first charging connecting end, and the other end of the inductor is connected with the midpoint of the first phase bridge arm;

the driving output connection end group comprises a first driving output connection end, a second driving output connection end and a third driving output connection end, the first driving output connection end is connected with the middle point of the first phase bridge arm, the second driving output connection end is connected with the middle point of the second phase bridge arm, and the third driving output connection end is connected with the middle point of the third phase bridge arm;

the input end of the voltage transformation unit is respectively connected with the midpoint of the second phase bridge arm and the midpoint of the third phase bridge arm;

the input end of the first bidirectional H bridge is connected with the output end of the voltage transformation unit; and the number of the first and second groups,

the energy storage connecting end group comprises a first energy storage connecting end and a second energy storage connecting end, the first energy storage connecting end is connected with the first confluence end, the second energy storage connecting end is connected with the second confluence end, and the output end of the first bidirectional H bridge is connected with the first energy storage connecting end and the second energy storage connecting end respectively.

25. The energy conversion device of claim 24, wherein the set of charging connections, the set of drive output connections, and the set of energy storage connections employ one of a connecting wire, a connector, or a connecting interface.

26. The energy conversion device of claim 24,

the first phase bridge arm comprises a first power switch and a second power switch which are connected in series, and the middle points of the first power switch and the second power switch are connected with the inductor;

the second phase bridge arm comprises a third power switch and a fourth power switch which are connected in series, and the middle points of the third power switch and the fourth power switch are connected with the transformation unit;

the third phase bridge arm comprises a fifth power switch and a sixth power switch which are connected in series, and the middle points of the fifth power switch and the sixth power switch are connected with the transformation unit;

a first end of the first power switch, a first end of the third power switch and a first end of the fifth power switch are connected in common to form the first bus end; and the second end of the second power switch, the second end of the fourth power switch and the second end of the sixth power switch are connected in common to form the second bus end.

27. The energy conversion device of claim 24, wherein the voltage transforming unit comprises:

one end of the primary coil is connected with the midpoint of the second phase bridge arm, and the other end of the primary coil is connected with the midpoint of the third phase bridge arm;

a first secondary coil connected with the first bidirectional H-bridge.

28. The energy conversion device of claim 27, wherein the voltage transformation unit further comprises:

and the second secondary coil is connected with the storage battery or the vehicle-mounted discharge port through a second bidirectional H bridge.

29. The energy conversion device of claim 27, wherein the first bidirectional H-bridge comprises:

a seventh phase bridge arm comprising a seventh power switch and an eighth power switch connected in series, wherein the midpoint of the seventh power switch and the midpoint of the eighth power switch are connected with one end of the first secondary coil;

the eighth-phase bridge arm comprises a ninth power switch and a tenth power switch which are connected in series, and the middle points of the ninth power switch and the tenth power switch are connected with the other end of the first secondary coil;

a first end of the seventh power switch and a first end of the ninth power switch are connected in common to form a third bus end of the first bidirectional H bridge; a second end of the eighth power switch and a second end of the tenth power switch are connected in common to form a fourth bus end of the first bidirectional H-bridge; the first energy storage connecting end is connected with the third confluence end, and the second energy storage connecting end is connected with the fourth confluence end.

30. A power system comprising the energy conversion device of any one of claims 24-29 and a control module, wherein the energy conversion device comprises:

the vehicle-mounted charging module comprises an inductor and a charging connecting end group, the charging connecting end group comprises a first charging connecting end and a second charging connecting end, and one end of the inductor is connected with the first charging connecting end;

the motor control module comprises a bridge arm converter and a driving output connecting end group, the bridge arm converter comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm, the middle point of the first-phase bridge arm is connected with the other end of the inductor, the first-phase bridge arm, the second-phase bridge arm and the third-phase bridge arm are connected in parallel to form a first junction end and a second junction end, and the second junction end is connected with the second charging connecting end; the driving output connecting end group comprises a first driving output connecting end, a second driving output connecting end and a third driving output connecting end, the first driving output connecting end is connected with the middle point of the first phase bridge arm, the second driving output connecting end is connected with the middle point of the second phase bridge arm, and the third driving output connecting end is connected with the middle point of the third phase bridge arm;

the bidirectional DC/DC module comprises a transformation unit, a first bidirectional H bridge and an energy storage connecting end group, wherein the input end of the transformation unit is respectively connected with the midpoint of the second phase bridge arm and the midpoint of the third phase bridge arm, and the output end of the transformation unit is connected with the input end of the first bidirectional H bridge; the energy storage connecting end group comprises a first energy storage connecting end and a second energy storage connecting end, the first energy storage connecting end is connected with the first confluence end, the second energy storage connecting end is connected with the second confluence end, and the output end of the first bidirectional H bridge is connected with the first energy storage connecting end and the second energy storage connecting end respectively.

31. The power system according to claim 30, wherein the first charging connection terminal and the second charging connection terminal are respectively connected to an external charging port, the first driving output connection terminal, the second driving output connection terminal and the third driving output connection terminal are respectively connected to a first phase coil, a second phase coil and a third phase coil of an external motor, and an external battery is respectively connected to the first energy storage connection terminal and the second energy storage connection terminal;

the energy conversion device also comprises a switch module, and the control module is used for controlling the switch module to realize the switching between a direct current charging mode and a driving mode;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the external charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the direct current external charging port, the inductor, the first phase bridge arm of the bridge arm converter and the external battery form a direct current charging circuit or a direct current discharging circuit.

32. The power system of claim 31, wherein the external charging port is an ac charging port, and the energy conversion device further comprises a first rectifying module, the first rectifying module being connected to the ac charging port, the first charging connection terminal, and the second charging connection terminal, respectively;

the control module is used for controlling the switch module to realize the switching between an alternating current charging mode and a driving mode;

in the ac charging mode, the control module is configured to control an ac charging circuit or an ac discharging circuit formed by the ac charging port, the first rectifying module, the inductor, the bridge arm converter, the voltage transforming unit, the first bidirectional H-bridge, and the external battery;

in the driving mode, the external battery, the bridge arm inverter, and the external motor form a driving circuit.

33. The power system of claim 31, wherein the external charging port is an ac charging port and a dc charging port, and the energy conversion device further comprises a second rectifying module, the second rectifying module being connected to the ac charging port, the first charging connection terminal, and the second charging connection terminal, respectively; the direct current charging port is respectively connected with the first charging connecting end and the second charging connecting end;

the control module is used for controlling the switch module to realize the switching of an alternating current charging mode, a direct current charging mode and a driving mode;

in the ac charging mode, the control module is configured to control an ac charging circuit or an ac discharging circuit formed by the ac charging port, the second rectifying module, the inductor, the bridge arm converter, the voltage transforming unit, the first bidirectional H-bridge, and the external battery; or the alternating current charging port, the second rectifying module, the inductor and the first phase bridge arm form an alternating current charging circuit or an alternating current discharging circuit;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the dc charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging circuit or a direct current discharging circuit.

34. The powertrain system of claim 31, wherein the energy conversion device further comprises a bidirectional leg, the bidirectional leg being connected to the second charging connection terminal, the first bus terminal, and the second bus terminal, respectively;

the control module is used for controlling the switch module to realize the switching of an alternating current charging mode, a direct current charging mode and a driving mode;

in the alternating current charging mode, the control module is used for controlling an alternating current charging circuit or an alternating current discharging circuit formed by the alternating current charging port, the inductor, the bridge arm converter, the bidirectional bridge arm, the voltage transformation unit, the first bidirectional H bridge and the external battery;

in the driving mode, the external battery, the bridge arm inverter and the external motor form a driving circuit;

in the dc charging mode, the dc charging port, the inductor, the bridge arm converter, the transforming unit, the first bidirectional H-bridge, and the external battery form a dc charging circuit or a dc discharging circuit; or the direct current charging port, the inductor, the first phase bridge arm and the external battery form a direct current charging circuit or a direct current discharging circuit.

35. The powertrain system of claim 30, wherein the on-board charging module, motor control module, and the bi-directional DC/DC module are integrated in a first housing.

36. The power system of claim 35, further comprising:

a speed reducer dynamically coupled with the external motor, the speed reducer and the external motor being integrated in a second case.

37. The power system of claim 36, wherein the first case is fixedly coupled to the second case.

38. A vehicle comprising a powertrain as claimed in any one of claims 15 to 23 or comprising a powertrain as claimed in any one of claims 30 to 37.

Technical Field

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

Background

In recent years, the investment in electric vehicles has been increasing, technologies related to electric vehicles have been rapidly developed, the market acceptance of electric vehicles has been increasing, and battery charging and motor driving have been attracting much attention as core technologies in electric vehicles. At present, a battery charging circuit and a motor driving circuit in the existing electric automobile on the market are generally separated, the battery charging circuit is used for charging the battery of the electric automobile, the motor driving circuit is used for driving the motor of the electric automobile, and the two circuits are mutually independent and independent.

However, although the battery charging and motor driving processes of the electric vehicle can be completed by using two circuits respectively, the two circuits in the above method are independent of each other, so that the control circuit including the battery charging circuit and the motor driving circuit has a complicated structure, a low integration level, a large volume and a high cost.

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

Disclosure of Invention

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

The present application is achieved as an energy conversion apparatus, comprising:

an inductor, one end of which is connected with an external charging port;

the bridge arm converter is connected between an external battery and an external charging port and comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm which are connected in parallel, and the other end of the inductor is connected with the first-phase bridge arm;

the input end of the voltage transformation unit is respectively connected with the second phase bridge arm and the third phase bridge arm; and the number of the first and second groups,

a first bidirectional H-bridge connected between an output terminal of the voltage transforming unit and an external battery;

the external charging port is connected with the external battery through an inductor, the bridge arm converter, the voltage transformation unit and the first bidirectional H bridge;

the external battery drives the external motor through the energy conversion device, the external charging port is externally connected with the power supply, and the external battery is charged through the energy conversion device.

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:

the vehicle-mounted charging module comprises an inductor, and the inductor is connected with an external charging port;

the motor control module comprises a bridge arm converter, and the bridge arm converter is respectively connected with an external charging port, an inductor, an external motor and an external battery;

the bidirectional DC/DC module comprises a transformation unit and a first bidirectional H bridge, wherein one end of the transformation unit is connected with the bridge arm converter, the other end of the transformation unit is connected with one end of the first bidirectional H bridge, and the other end of the first bidirectional H bridge is connected with an external battery;

the external charging port is connected with the external battery through an inductor, the bridge arm converter, the voltage transformation unit and the first bidirectional H bridge;

the control module is used for controlling the energy conversion device to drive the motor, and when the external charging port is externally connected with a power supply, the control module is also used for controlling the energy conversion device to charge an external battery.

Another object of the present application is to provide an energy conversion apparatus, comprising:

the charging connection end group comprises a first charging connection end and a second charging connection end;

the bridge arm converter comprises a first phase bridge arm, a second phase bridge arm and a third phase bridge arm, wherein the first phase bridge arm, the second phase bridge arm and the third phase bridge arm are connected in parallel to form a first bus end and a second bus end, and the second bus end is connected with the second charging connecting end;

one end of the inductor is connected with the first charging connecting end, and the other end of the inductor is connected with the midpoint of the first phase bridge arm;

the driving output connecting end group comprises a first driving output connecting end, a second driving output connecting end and a third driving output connecting end, the first driving output connecting end is connected with the middle point of the first phase bridge arm, the second driving output connecting end is connected with the middle point of the second phase bridge arm, and the third driving output connecting end is connected with the middle point of the third phase bridge arm;

the input end of the voltage transformation unit is respectively connected with the midpoint of the second phase bridge arm and the midpoint of the third phase bridge arm;

the input end of the first bidirectional H bridge is connected with the output end of the voltage transformation unit; and the number of the first and second groups,

the energy storage connecting end group comprises a first energy storage connecting end and a second energy storage connecting end, the first energy storage connecting end is connected with the first confluence end, the second energy storage connecting end is connected with the second confluence end, and the output end of the first bidirectional H bridge is connected with the first energy storage connecting end and the second energy storage connecting end respectively.

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:

the vehicle-mounted charging module comprises an inductor and a charging connecting end group, the charging connecting end group comprises a first charging connecting end and a second charging connecting end, and one end of the inductor is connected with the first charging connecting end;

the motor control module comprises a bridge arm converter and a driving output connecting end group, wherein the bridge arm converter comprises a first-phase bridge arm, a second-phase bridge arm and a third-phase bridge arm, the middle point of the first-phase bridge arm is connected with the other end of the inductor, the first-phase bridge arm, the second-phase bridge arm and the third-phase bridge arm are connected in parallel to form a first junction end and a second junction end, and the second junction end is connected with the second charging connecting end; the driving output connecting end group comprises a first driving output connecting end, a second driving output connecting end and a third driving output connecting end, the first driving output connecting end is connected with the middle point of the first phase bridge arm, the second driving output connecting end is connected with the middle point of the second phase bridge arm, and the third driving output connecting end is connected with the middle point of the third phase bridge arm;

the bidirectional DC/DC module comprises a transformation unit, a first bidirectional H bridge and an energy storage connecting end group, wherein the input end of the transformation unit is respectively connected with the midpoint of a second-phase bridge arm and the midpoint of a third-phase bridge arm, and the output end of the transformation unit is connected with the input end of the first bidirectional H bridge; the energy storage connecting end group comprises a first energy storage connecting end and a second energy storage connecting end, the first energy storage connecting end is connected with the first confluence end, the second energy storage connecting end is connected with the second confluence end, and the output end of the first bidirectional H bridge is connected with the first energy storage connecting end and the second energy storage connecting end respectively.

Another object of the present application is to provide a vehicle including the power system described above.

The application provides an energy conversion device, a power system and a vehicle, wherein the energy conversion device can work in a driving mode and a charging mode in a time-sharing manner by adopting an inductor, a bridge arm converter, a transformation unit and a first bidirectional H bridge, when used for driving the motor, the battery, the bridge arm converter and the motor form a driving circuit for driving the motor, when used for charging, the charging port, the inductor, the bridge arm inverter, the transforming unit, the first bidirectional H-bridge, and the battery form a charging circuit, and therefore, in the driving circuit and the charging circuit, the bridge arm converter is multiplexed, thereby simplifying the circuit structure and improving the integration level, therefore, the purposes of volume reduction and cost reduction are achieved, and the problems of complex structure, low integration level, large volume and high cost of the conventional overall control circuit comprising a battery charging circuit and a motor driving circuit are solved.

The bridge arm converter in the scheme can be split into two parts, the first phase of bridge arm is matched with the inductor and used as a boost DC, and the rest two phases of bridge arms form a bidirectional H bridge for converting direct current into alternating current.

Meanwhile, the bidirectional DC in the scheme utilizes the two remaining bridge arms of the bridge arm converter as a front bidirectional H bridge, so that the demand of a switching tube is reduced, the cost is reduced, and the integration level of the circuit is also improved.

Drawings

FIG. 1 is a schematic block diagram of an apparatus according to a first embodiment of the present disclosure;

FIG. 2 is a schematic diagram of the structure of the apparatus provided in the first embodiment of the present application;

FIG. 3 is a schematic diagram of another circuit structure of the apparatus according to the first embodiment of the present application;

FIG. 4 is a schematic block diagram of an apparatus according to the first embodiment of the present application;

FIG. 5 is a schematic diagram of an apparatus provided in a second embodiment of the present application;

FIG. 6 is a schematic circuit diagram of an apparatus according to a third embodiment of the present application;

FIG. 7 is a schematic diagram of another circuit structure of the apparatus provided in the third embodiment of the present application;

FIG. 8 is a schematic circuit diagram of an apparatus according to a fourth embodiment of the present application;

FIG. 9 is a schematic diagram of another circuit structure of the apparatus provided in the fourth embodiment of the present application;

FIG. 10 is a schematic circuit diagram of an apparatus according to a fifth embodiment of the present application;

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

FIG. 12 is a schematic circuit diagram of an apparatus according to a sixth embodiment of the present application;

FIG. 13 is a schematic diagram of another circuit structure of an apparatus provided in the sixth embodiment of the present application;

FIG. 14 is a schematic diagram of another circuit structure of an apparatus according to a sixth embodiment of the present application;

FIG. 15 is a schematic circuit diagram of an apparatus according to a seventh embodiment of the present application;

FIG. 16 is a schematic diagram of another circuit structure of the apparatus according to the seventh embodiment of the present application;

fig. 17 is a schematic circuit diagram of an apparatus according to an eighth embodiment of the present application;

FIG. 18 is a schematic diagram of another circuit structure of the apparatus according to the eighth embodiment of the present application;

FIG. 19 is a schematic diagram of the operation of the apparatus provided by the embodiments of the present application;

FIG. 20 is a schematic diagram of another operational principle of the apparatus provided by the embodiments of the present application;

FIG. 21 is a schematic diagram of a modular configuration of a powertrain provided in a ninth embodiment of the present application;

FIG. 22 is a schematic illustration of a powertrain provided in a twelfth embodiment of the present application;

FIG. 23 is a block diagram of an apparatus provided in a thirteenth embodiment of the present application;

fig. 24 is a schematic circuit diagram of an apparatus according to a fourteenth embodiment of the present application;

fig. 25 is a schematic circuit diagram of an apparatus according to a fifteenth embodiment of the present application;

FIG. 26 is a schematic circuit diagram of an apparatus according to a sixteenth embodiment of the present application;

fig. 27 is a schematic circuit diagram of an apparatus according to a seventeenth embodiment of the present application;

fig. 28 is a schematic structural diagram of a power system provided in an eighteenth 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 to 3 show a module structure of an energy conversion apparatus 1 provided in a first embodiment of the present application, and for convenience of description, only parts related to the present embodiment are shown, and detailed description is as follows:

as shown in fig. 1, an energy conversion apparatus 1 provided in the embodiment of the present application includes an inductor 12, a bridge arm converter 13, a transformation unit 14, and a first bidirectional H-bridge 15.

Specifically, referring to fig. 1, the bridge arm converter 13 includes a first phase bridge arm 131, a second phase bridge arm 132, and a third phase bridge arm 133 connected in this order. One end of the external charging port 2 is connected with one end of the inductor 12, and the other end of the external charging port 2 is connected with the bridge arm converter 13; the other end of inductor 12 is connected to first phase leg 131. The first phase bridge arm 131, the second phase bridge arm 132 and the third phase bridge arm 133 are connected in parallel, the second phase bridge arm 132 and the third phase bridge arm 133 are respectively connected with the input end of the transformation unit 14, the output end of the transformation unit 14 is connected with the input end of the first bidirectional H bridge 15, and the output end of the first bidirectional H bridge 15 is connected with the external battery 3. The arm inverter 13 is also connected between the external battery 3 and the external motor 4.

The energy conversion device 1 operates in a driving mode and a charging mode in a time-sharing manner.

When the energy conversion device 1 operates in the driving mode, as shown in fig. 2, in the driving mode, the external battery 3, the arm converter 13, and the external motor 4 form a driving circuit for driving the external motor 4, the external battery 3 supplies direct current to the arm converter 13, the first phase arm 131 in the arm converter 13 converts the direct current into three-phase alternating current, the three-phase alternating current is input to the external motor 4 to drive the external motor 4 to operate, the external motor 4 outputs alternating current, and the direct current is converted and output via the second phase arm 132 and the third phase arm 133 in the arm converter 13 and flows back to the external battery 3.

When the energy conversion device 1 operates in the charging mode, as shown in fig. 3, in the charging mode, the external charging port 2, the inductor 12, the arm converter 13, the voltage transforming unit 14, and the first bidirectional H-bridge 15 form a charging circuit for charging the external battery 3. In the above charging mode, the external charging port 2 may provide the charging circuit with power supplied from the external charging port 2.

When the external charging port 2 supplies a dc power, as shown in fig. 3, the external charging port 2, the inductor 12, the bridge arm converter 13, the transformer unit 14, the first bidirectional H-bridge 15, and the external battery 3 form a dc charging circuit, at this time, the dc power output from the external charging port 2 is boosted through the inductor 12 and the first phase bridge arm 131 in the bridge arm converter 13 and outputs the dc power, the second phase bridge arm 132 and the third phase bridge arm 133 in the bridge arm converter 13 convert the dc power output from the first phase bridge arm 131 and output an ac power, the transformer unit 14 converts a high-frequency ac power and outputs another high-frequency ac power, and the first bidirectional H-bridge 15 rectifies the high-frequency ac power output from the transformer unit 14 and outputs the dc power to charge the external battery 3.

Alternatively, the external charging port 2, the inductor 12, the first-phase arm 131, and the external battery 3 form a dc charging circuit, and at this time, the dc power output from the external charging port 2 is boosted by the inductor 12 and the first-phase arm 131 in the arm converter 13, and is output as dc power to charge the external battery 3.

Wherein, for the inductor 12, in the above charging mode, the inductor 12 is used for storing and releasing electric energy.

For the bridge arm converter 13, the bridge arm converter 13 at least comprises three-phase bridge arms connected in parallel, each phase of bridge arm is connected with the external battery 3 and the external motor 4, each phase of bridge arm comprises two power switches connected in series, and in the driving mode, the bridge arm converter 13 is used for converting electric energy input by the external battery 3 and outputting three-phase alternating current to drive the external motor 4; in the above charging mode, the bridge arm converter 13 is configured to convert the electric energy in the charging circuit and output a direct current or a high-frequency alternating current, and increase the charging power to charge the external battery 3.

It should be noted that, referring to fig. 4, the bridge arm converter 13 in the present embodiment may also be another multiphase bridge arm converter, such as: a six-phase bridge arm converter. In this case, the arm converter 13 includes six-phase arms, namely, a first-phase arm 131, a second-phase arm 132, a third-phase arm 133, a fourth-phase arm 134, a fifth-phase arm 135, and a sixth-phase arm 136, which are connected in parallel to each other, each of which is connected to the external battery 3 and the external motor 4, and each of which includes two power switches connected in series. As shown in fig. 4, the bridge arms connected to the transformer unit are not limited to the second phase bridge arm 132 and the third phase bridge arm 133, and may be other bridge arms capable of converting the dc power output from the first phase bridge arm 131 into ac power, for example, the third phase bridge arm 133 and the fourth phase bridge arm 134, and are not particularly limited here.

For the voltage transformation unit 14, in the above charging mode, the voltage transformation unit 14 is configured to convert an alternating current input in the charging loop into another alternating current for output, so as to implement isolation of circuits on both sides of the voltage transformation unit 14.

For the first bidirectional H-bridge 15, the first bidirectional H-bridge 15 at least includes two parallel-connected bridge arms, each of which includes two power switches connected in series, and in the charging mode, the first bidirectional H-bridge 15 is configured to rectify the alternating current in the charging loop to output a direct current so as to charge the external battery 3.