All-in-one power supply device, all-in-one power assembly and electric vehicle

Abstract

The invention discloses an all-in-one power supply device, an all-in-one power assembly and an electric vehicle, and relates to the technical field of new energy automobiles. A power conversion circuit in the all-in-one power supply device comprises a primary side bridge arm circuit, a first transformer and a secondary side bridge arm circuit. The primary side bridge arm circuit comprises two bridge arms, and bridge arm midpoints of the two bridge arms are respectively used for connecting two ends of a primary side winding of the first transformer; the secondary bridge arm circuit comprises a first bridge arm, a second bridge arm and a third bridge arm, a bridge arm midpoint of the first bridge arm is used for being connected with one end of a secondary winding of the first transformer, and a bridge arm midpoint of the second bridge arm is used for being connected with the other end of the secondary winding of the first transformer and one end of a rotor winding of the electro-magnetic motor through a first switch unit; and the middle point of the third bridge arm is used for connecting the other end of the rotor winding. Therefore, the secondary side bridge arm circuit has the function of supplying power to the rotor winding, a power supply circuit of the rotor winding does not need to be additionally arranged, and the circuit complexity of the electro-magnetic motor is reduced.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicle technology, and in particular to an all-in-one power supply device, an all-in-one power assembly and an electric vehicle. Background Art

[0002] With the popularization of electric vehicles and the development of intelligent driving technology, users are paying more and more attention to the mileage achievement rate of electric vehicles at high speed cruising, that is, the actual endurance of electric vehicles. When electric vehicles are running at high speed, permanent magnet motors need to operate in weak magnetic conditions, resulting in part of the stator current not doing work, reducing the power factor, thereby reducing the powertrain efficiency, resulting in a low mileage achievement rate at high speed cruising. Compared with permanent magnet motors, electromagnetic excitation motors can adjust the magnetic field strength of the rotor in real time, and do not need to operate in weak magnetic conditions when running at high speeds, which can improve the efficiency of the powertrain and effectively improve the mileage achievement rate at high speed cruising.

[0003] However, compared with permanent magnet motors, the circuit complexity of electric excitation motors is higher. Therefore, it is urgent to provide a method to reduce the circuit complexity of electric excitation motors. Summary of the invention

[0004] The present application provides an all-in-one power supply device, an all-in-one powertrain and an electric vehicle, which are used to reduce the circuit complexity of an electromagnetic motor.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an all-in-one power supply device is provided, which is used to receive the alternating current output by the AC charging pile and convert the alternating current into direct current to charge the power battery, and is used to receive the direct current output by the power battery through a power conversion circuit to power the rotor winding of the electric excitation motor. The all-in-one power supply device includes: at least one circuit board, which is used to carry the electrical components of the power conversion circuit; a shell, which is used to accommodate at least one circuit board, and the shell also includes a power battery interface for connecting the power battery, and the all-in-one power supply device charges the power battery or receives power from the power battery through the power battery interface. The power conversion circuit includes a primary bridge arm circuit, a first transformer, and a secondary bridge arm circuit. Among them, the primary bridge arm circuit includes two bridge arms, and the midpoints of the two bridge arms are respectively used to connect the two ends of the primary winding of the first transformer; the secondary bridge arm circuit includes a first bridge arm, a second bridge arm and a third bridge arm, the midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer, and the midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer and one end of the rotor winding through the first switch unit; the midpoint of the third bridge arm is used to connect the other end of the rotor winding.

[0007] In the above technical solution, the two ends of the three bridge arms in the secondary bridge arm circuit are connected to the two ends of the power battery through the power battery interface, and the midpoints of the first bridge arm and the second bridge arm are connected to the two ends of the secondary winding of the first transformer, which can constitute the charging circuit of the power battery. The midpoints of the second bridge arm and the third bridge arm are connected to the two ends of the rotor winding, which can constitute the rotor power supply circuit of the electromagnetic motor. Based on two different circuits, the all-in-one power supply device can charge the power battery and supply power to the rotor winding of the electromagnetic motor. When the AC charging pile is connected to the charging port of the electric vehicle and supplies power to the electric vehicle, the all-in-one power supply device can receive AC power through the AC interface, and after converting the AC power into DC power, transmit it to the power battery through the secondary bridge arm circuit to realize the function of charging the power battery. During the driving process of the electric vehicle, the secondary bridge arm circuit can receive the DC power output by the power battery through the power battery interface, and transmit the DC power to the rotor winding of the electromagnetic motor, thereby realizing the function of supplying power to the rotor winding. After the rotor winding passes through direct current, the magnetic field generated by the magnetic poles on the stator winding will generate an induced electromotive force on the rotor winding, driving the rotor to rotate and provide driving force for the electric vehicle. In this way, there is no need to set up a separate rotor winding power supply circuit. By reusing the secondary bridge arm circuit in the all-in-one power supply device, the purpose of supplying power to the rotor winding of the electromagnetic motor is achieved, thereby saving the number of components of the electromagnetic motor and reducing the circuit complexity of the electromagnetic motor.

[0008] In any possible implementation of the first aspect, the third bridge arm of the secondary bridge arm circuit includes a first capacitor and a second capacitor connected in series. In the above possible technical solutions, when the third bridge arm includes a first capacitor and a second capacitor connected in series, the third bridge arm and the second bridge arm can form a half-bridge circuit. Since the half-bridge circuit only needs to control two switching tubes, the requirements for the driving circuit of the switching tube are lower, which can further reduce the circuit complexity of the all-in-one power supply device.

[0009] In any possible implementation of the first aspect, the first switch unit is used to turn on or off the connection between one end of the secondary winding of the first transformer and the midpoint of the bridge arm of the second bridge arm, and to turn on or off the connection between the midpoint of the bridge arm of the second bridge arm and one end of the rotor winding of the electromagnetic motor. In the above possible technical solutions, by controlling the operating state of the first switch unit, the connection relationship between the secondary bridge arm circuit and the secondary winding and the rotor winding of the first transformer can be controlled, so that the multi-in-one power supply device can meet different usage requirements through different working states. For example, in the process of charging the power battery, the first switch unit turns on the connection between one end of the secondary winding of the first transformer and the midpoint of the bridge arm of the second bridge arm, and in the process of powering the rotor winding, the first switch unit turns on the connection between the midpoint of the bridge arm of the second bridge arm and one end of the rotor winding of the electromagnetic motor.

[0010] In any possible implementation of the first aspect, the all-in-one power supply device further includes a power factor correction circuit. In the process of the power conversion circuit charging the power battery, the first switch unit conducts the connection between the bridge arm midpoint of the second bridge arm and one end of the secondary winding of the first transformer and disconnects the connection between the bridge arm midpoint of the second bridge arm and one end of the rotor winding. The power factor correction circuit is used to convert the AC power output by the AC charging pile into DC power. The power conversion circuit is used to perform voltage conversion on the DC power output by the power factor correction circuit and charge the power battery through the power battery interface. In the above possible technical solution, the first switch unit conducts the connection between the bridge arm midpoint of the second bridge arm and one end of the secondary winding of the first transformer and disconnects the connection between the bridge arm midpoint of the second bridge arm and one end of the rotor winding, that is, only the charging circuit of the power battery is conducted, and the circuit for the power battery to supply power to the rotor winding of the electromagnetic motor is disconnected. After the power factor correction circuit converts the AC power output by the AC charging pile into DC power, the power conversion circuit can transmit the DC power to the power battery through the power battery interface, thereby achieving the purpose of charging the power battery, avoiding the power battery from discharging to the rotor winding during the charging process, and further ensuring the safety of the electric vehicle during charging.

[0011] In any possible implementation of the first aspect, in the process of the all-in-one power supply device receiving the direct current output by the power battery through the power conversion circuit to power the rotor winding, the first switch unit switches on the connection between the midpoint of the second bridge arm of the secondary bridge arm circuit and the rotor winding of the electromagnetic motor and disconnects the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer, and the midpoints of the second bridge arm and the third bridge arm power the rotor winding. In the above possible technical solutions, the first switch unit switches on the connection between the midpoint of the second bridge arm of the secondary bridge arm circuit and the rotor winding of the electromagnetic motor and disconnects the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer, that is, only the power supply circuit of the rotor winding is switched on, and the charging circuit of the power battery is disconnected. The second bridge arm and the third bridge arm receive the direct current output by the power battery at both ends of the bridge arm, and after voltage conversion of the direct current, the direct current after voltage conversion is transmitted to the rotor winding through the midpoint of the bridge arm of the second bridge arm and the midpoint of the bridge arm of the third bridge arm, so as to realize the purpose of supplying power to the rotor winding.

[0012] In any possible implementation of the first aspect, the all-in-one power supply device further includes a DC conversion circuit, which is used to perform a step-down conversion on the DC power output by the power battery, or the DC conversion circuit is used to perform a step-down conversion on the DC power output by the power conversion circuit during the process of the all-in-one power supply device charging the power battery. In the above possible technical solutions, during the process of charging the power battery, or during the process of power supply by the power battery, the DC conversion circuit can step down the received DC power to output matching DC power to the on-board electrical equipment, external electrical equipment or on-board small battery, thereby realizing the function of supplying power to the on-board electrical equipment and external electrical equipment, or charging the on-board small battery.

[0013] In any possible implementation of the first aspect, the DC conversion circuit includes a second transformer and a secondary circuit. The two ends of the primary winding of the second transformer are respectively used to connect the midpoint of the first bridge arm and the midpoint of the third bridge arm of the secondary bridge arm circuit, and the secondary winding of the second transformer is used to power the secondary circuit. In the above possible technical solutions, by connecting the two ends of the primary winding of the second transformer to the midpoint of the first bridge arm and the midpoint of the third bridge arm of the secondary bridge arm circuit, the bridge arm in an idle state can be reused, and the first bridge arm and the third bridge arm simultaneously constitute the primary circuit of the second transformer, and can supply power to the primary winding of the second transformer, which saves the electrical components of the second transformer to a certain extent, is conducive to reducing circuit complexity and improving the integration of the all-in-one power supply device.

[0014] In any possible implementation of the first aspect, the all-in-one power supply device also includes a three-phase inverter circuit, and the midpoints of the three bridge arms of the three-phase inverter circuit are respectively used to connect the three-phase windings of the stator of the electromagnetic motor.

[0015] In any possible implementation of the first aspect, the DC conversion circuit includes a second transformer and a secondary circuit. The two ends of the primary winding of the second transformer are respectively used to connect the bridge arm midpoint of the third bridge arm of the secondary bridge arm circuit and the bridge arm midpoint of the one-phase bridge arm of the three-phase inverter circuit. In the above possible technical scheme, by connecting the two ends of the primary winding of the second transformer to the bridge arm midpoint of the third bridge arm of the secondary bridge arm circuit and the bridge arm midpoint of the one-phase bridge arm of the three-phase inverter circuit, the bridge arm in an idle state can be reused, and the third bridge arm of the secondary conversion circuit and the one-phase bridge arm of the three-phase inverter circuit simultaneously constitute the primary circuit of the second transformer, which can supply power to the primary winding of the second transformer, saving the electrical components of the second transformer to a certain extent, which is conducive to reducing the complexity of the circuit and improving the integration of the multi-in-one power supply device.

[0016] In any possible implementation of the first aspect, the DC conversion circuit includes a second transformer and a secondary circuit. One end of the primary winding of the second transformer is used to connect the bridge arm midpoint of the third bridge arm, and the other end of the primary winding of the second transformer is used to connect the bridge arm midpoint of the first bridge arm and the bridge arm midpoint of the one-phase bridge arm of the three-phase inverter circuit through the second switch unit, and the secondary winding of the second transformer is used to power the secondary circuit. In the above possible technical solution, by controlling the operating state of the second switch unit, the connection relationship between the secondary winding of the second transformer and the first bridge arm of the secondary bridge arm circuit and the one-phase bridge arm in the three-phase inverter circuit can be controlled, so that the multi-in-one power supply device can meet different usage requirements through different working states. For example, in the process of charging the power battery, the second switch unit conducts the connection between one end of the secondary winding of the second transformer and the bridge arm midpoint of the one-phase bridge arm in the three-phase inverter circuit, and in the process of powering the three-phase winding of the stator, the second switch unit conducts the connection between one end of the secondary winding of the second transformer and the bridge arm midpoint of the first bridge arm.

[0017] In any possible implementation of the first aspect, during the process of the DC conversion circuit being used to step down the DC power output by the power battery, the second switch unit switches on the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of the first bridge arm and switches off the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of one phase of the three-phase inverter circuit, and the third bridge arm and the bridge arm of one phase of the three-phase inverter circuit are used to supply power to the primary winding of the second transformer. In the above possible technical solutions, during the process of the DC conversion circuit being used to step down the DC power output by the power battery, the electric vehicle may be in a driving state, the secondary bridge arm circuit of the power conversion circuit is in an idle state, and the three-phase inverter circuit is used to supply power to the three-phase winding of the stator. The first bridge arm in an idle state is reused, and the received DC power is transmitted to the primary winding of the second transformer through the midpoint of the first bridge arm and the midpoint of the third bridge arm, and the primary winding of the second transformer is powered, thereby achieving the purpose of powering the load or the battery, reducing the electrical components of the second transformer to a certain extent, which is beneficial to reducing circuit complexity and improving the integration of the all-in-one power supply device.

[0018] In any possible implementation of the first aspect, during the process in which the DC conversion circuit is used to step down the DC power output by the power conversion circuit, the second switch unit disconnects the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of the first bridge arm and conducts the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of one phase of the three-phase inverter circuit, and the third bridge arm and the first bridge arm are used to supply power to the primary winding of the second transformer. In the above possible technical solutions, during the process in which the DC conversion circuit is used to step down the DC power output by the power conversion circuit, the electric vehicle may be in a parking state, the three-phase winding of the stator does not need to work, the secondary bridge arm circuit of the power conversion circuit is in a working state, and the three-phase inverter circuit is in an idle state. One-phase bridge arm of the three-phase inverter circuit in an idle state is reused, and the received DC power is transmitted to the primary winding of the second transformer through the bridge arm midpoint of the third bridge arm and the bridge arm midpoint of one-phase bridge arm of the three-phase inverter circuit, and power is supplied to the primary winding of the second transformer, thereby achieving the purpose of supplying power to the load or the battery, reducing the electrical components of the second transformer to a certain extent, which is conducive to reducing circuit complexity and improving the integration of the all-in-one power supply device.

[0019] In any possible implementation of the first aspect, the all-in-one power supply device also includes a control circuit board located in the housing, and the control circuit board is used to control each switch tube in the three-phase inverter circuit and each switch tube in the secondary bridge arm circuit. In the above possible technical solution, the six switch tubes in the three-phase inverter circuit form a three-phase bridge arm for supplying power to the three-phase winding of the stator, and each switch tube in the secondary bridge arm circuit forms three bridge arms, two of which can also be reused to supply power to the rotor winding of the electromagnetic motor. Each switch tube in the three-phase inverter circuit and each switch tube in the secondary bridge arm circuit are controlled by the same control circuit board, which not only saves the device volume and cost of the control circuit board, but also solves the coordination problem of the excitation current of the rotor winding and the three-phase winding current of the stator. For example, when the electric vehicle is running at high speed, the control circuit board can simultaneously reduce the stator current and the rotor current.

[0020] In the second aspect of the present application, an all-in-one powertrain is provided, which includes an electromagnetic motor and an all-in-one power supply device described in the first aspect or any possible implementation of the first aspect, and the all-in-one power supply device includes a power conversion circuit and a three-phase inverter circuit. The power conversion circuit includes a primary bridge arm circuit, a first transformer, and a secondary bridge arm circuit. Among them, the primary bridge arm circuit includes two bridge arms, and the bridge arm midpoints of the two bridge arms are respectively used to connect the two ends of the primary winding of the first transformer. The secondary bridge arm circuit includes a first bridge arm, a second bridge arm, and a third bridge arm, the bridge arm midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer, the bridge arm midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer and one end of the rotor winding of the electromagnetic motor through the first switch unit, and the bridge arm midpoint of the third bridge arm is used to connect the other end of the rotor winding; the three bridge arm midpoints of the three-phase inverter circuit are respectively used to connect the three-phase winding of the stator of the electromagnetic motor.

[0021] In a third aspect of the present application, an electric vehicle is provided, comprising a power battery and the all-in-one powertrain described in the second aspect, the all-in-one powertrain being used to receive alternating current to charge the power battery, or the power battery supplies power to the all-in-one powertrain.

[0022] It can be understood that the beneficial effects that can be achieved by the all-in-one powertrain and electric vehicle provided above can correspond to the beneficial effects of the all-in-one power supply device provided above, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the structure of an electric vehicle provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the structure of an all-in-one power supply device provided in an embodiment of the present application;

[0025] Figure 3 A circuit topology diagram of an all-in-one power supply device provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the structure of another all-in-one power supply device provided in an embodiment of the present application;

[0027] Figure 5 A circuit topology diagram of another all-in-one power supply device provided in an embodiment of the present application;

[0028] Figure 6 A schematic diagram of the structure of another all-in-one power supply device provided in an embodiment of the present application;

[0029] Figure 7A circuit topology diagram of another all-in-one power supply device provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of another all-in-one power supply device provided in an embodiment of the present application;

[0031] Fig. 9 A circuit topology diagram of another all-in-one power supply device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will discuss the making and use of each embodiment in detail. However, it should be understood that many applicable inventive concepts provided by this application can be implemented in a variety of specific environments. The specific embodiments discussed are only illustrative of the specific ways to implement and use this application and this technology, and do not limit the scope of this application.

[0033] Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art.

[0034] Before introducing the embodiments of the present application, the background technology involved in the present application is first introduced.

[0035] With the popularization of electric vehicles and the development of intelligent driving technology, users are paying more and more attention to the mileage achievement rate of electric vehicles at high speed cruising, that is, the actual endurance of electric vehicles. When electric vehicles run at high speed, permanent magnet motors need to run in weak magnetic conditions, resulting in part of the stator current not doing work, the power factor is reduced, thereby reducing the efficiency of the powertrain and making the mileage achievement rate of high-speed cruising low. Compared with permanent magnet motors, the rotor current of electromagnetic motors can be adjusted according to the speed, that is, to adjust the magnetic field strength of the rotor. When running at high speed, the rotor current is small, the stator of the electromagnetic motor does not need to run in weak magnetic conditions, and the power factor is high, which can improve the efficiency of the powertrain and effectively improve the mileage achievement rate of high-speed cruising. In addition, in permanent magnet motors, the magnetic poles are generated by permanent magnets, while in electromagnetic motors, the magnetic poles are generated by direct current excitation using the coils of the rotor (i.e., rotor windings). Since permanent magnets are not used, electromagnetic motors do not require the use of rare earth materials during the production process, which is more cost-effective.

[0036] However, compared with permanent magnet motors, the rotor of the electromagnetic motor needs to be powered separately to drive the rotor of the electromagnetic motor to rotate, that is, an additional rotor power supply circuit of the electromagnetic motor needs to be set, which will lead to a higher circuit complexity of the electromagnetic motor. Therefore, it is necessary to reduce the circuit complexity of the electromagnetic motor to further reduce the production cost of the electromagnetic motor.

[0037] In order to solve the above technical problems, the embodiments of the present application provide an all-in-one power supply device, an all-in-one power assembly and an electric vehicle. The all-in-one power supply device provided in the embodiments of the present application can not only receive the AC power output by the AC charging pile and convert the AC power into DC power to charge the power battery, but also receive the DC power output by the power battery through the power conversion circuit to power the rotor winding of the electromagnetic motor, thereby eliminating the need to set up a power supply circuit for the rotor winding of the electromagnetic motor in the electric vehicle, and can simplify the circuit complexity of the electromagnetic motor to a certain extent.

[0038] Figure 1 A schematic diagram of an electric vehicle 01 provided in an embodiment of the present application. Figure 1 As shown, the electric vehicle 01 includes a power battery 10 and an all-in-one power assembly 20. Among them, the all-in-one power assembly 20 includes an all-in-one power supply device 30 and an electromagnetic motor 40. During the charging process of the electric vehicle 01, the all-in-one power supply device 30 is used to convert the received alternating current into direct current and then charge the power battery 10. During the driving process of the electric vehicle 01, the all-in-one power supply device 30 is used to supply the output of the power battery 10 to the electromagnetic motor 40 to drive the electric vehicle 01 to drive. The electromagnetic motor 40 includes a fixed stator winding and a rotatable rotor winding. The stator winding is provided with a pair of magnetic poles, and each pair of magnetic poles is arranged relative to the rotor winding. When the rotor winding is connected to a direct current, the magnetic field generated by the magnetic poles on the stator winding will generate an induced electromotive force on the rotor winding, driving the rotor to rotate and thus providing driving force for the electric vehicle 01.

[0039] The technical solution provided by the embodiments of the present application is further described in detail below in conjunction with the accompanying drawings.

[0040] Figure 2 The structure of an all-in-one power supply device 30 provided in an embodiment of the present application is illustrated. Figure 3 The example is out Figure 2 The circuit topology of the all-in-one power supply device 30 is shown in FIG.

[0041] In one embodiment, if Figure 2 As shown, the all-in-one power supply device 30 includes at least one circuit board ( Figure 2 ), a housing 32 and a power conversion circuit 31, wherein the at least one circuit board is used to carry electrical components of the power conversion circuit 31, and the housing 32 is used to accommodate the at least one circuit board.

[0042] In one embodiment, the all-in-one power supply device 30 further includes a power factor correction circuit 34. The electrical components of the power factor correction circuit 34 and the electrical components of the power conversion circuit 31 are integrated on the same circuit board, or the electrical components of the power factor correction circuit 34 and the electrical components of the power conversion circuit 31 are separately integrated on two circuit boards, and the two circuit boards are both located in the housing 32.

[0043] The electrical components include power devices, resistors, capacitors, and transformers. The power device may be a metal-oxide-semiconductor field-effect transistor (MOSFET), which may also be referred to as a MOS tube, each of which includes a reverse-biased body diode. Alternatively, the power device may include an insulated-gate bipolar transistor (IGBT) and a diode D, wherein the collector of the IGBT is connected to the cathode of the diode D, and the emitter of the IGBT is connected to the anode of the diode D.

[0044] like Figure 2 As shown, the housing 32 also includes a power battery 10 interface for connecting the power battery 10, and the all-in-one power supply device 30 can charge the power battery 10 or receive power from the power battery 10 through the power battery 10 interface. The housing 32 also includes an AC interface for receiving AC power, and the all-in-one power supply device 30 can receive AC power input from the AC charging pile through the AC interface, or output AC power to other AC devices through the AC interface.

[0045] In one embodiment, if Figure 2 and Figure 3 As shown, the power conversion circuit 31 includes a primary bridge arm circuit 311, a first transformer 312 and a secondary bridge arm circuit 313. The primary bridge arm circuit 311 includes two bridge arms, and the bridge arm midpoints of the two bridge arms are respectively used to connect the two ends of the primary winding of the first transformer 312. The secondary bridge arm circuit 313 includes a first bridge arm, a second bridge arm and a third bridge arm, the bridge arm midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer 312, the bridge arm midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer 312 and one end of the rotor winding 41 through the first switch unit 33; the bridge arm midpoint of the third bridge arm is used to connect the other end of the rotor winding 41.

[0046] In an example, any bridge arm in the primary bridge arm circuit 311 and the secondary bridge arm circuit 313 includes an upper bridge arm switch tube and a lower bridge arm switch tube, and the connection point between the upper bridge arm switch tube and the lower bridge arm switch tube is the midpoint of the bridge arm.

[0047] In another example, the third bridge arm of the secondary bridge arm circuit 313 includes a first capacitor C1 and a second capacitor C2 connected in series. The connection point between the first capacitor C1 and the second capacitor C2 is the bridge arm midpoint of the third bridge arm.

[0048] When the third bridge arm includes an upper bridge arm switch tube and a lower bridge arm switch tube connected in series, the third bridge arm and the second bridge arm can constitute a full-bridge circuit; when the third bridge arm includes a first capacitor C1 and a second capacitor C2 connected in series, the third bridge arm and the second bridge arm can constitute a half-bridge circuit. In practical applications, both the half-bridge circuit and the full-bridge circuit can achieve the purpose of voltage conversion. In comparison, since the half-bridge circuit only needs to control two switch tubes, the requirements for the drive circuit of the switch tube are lower, and the circuit complexity of the all-in-one power supply device 30 can be further reduced, so the half-bridge circuit has more advantages in terms of cost. As an example and not a limitation, the embodiment of the present application is described by taking a half-bridge circuit as an example.

[0049] like Figure 3 As shown, the primary bridge arm circuit 311 includes an upper bridge arm switch tube Q1, a lower bridge arm switch tube Q2, an upper bridge arm switch tube Q3, and a lower bridge arm switch tube Q4. The midpoint of the bridge arm in which the upper bridge arm switch tube Q1 and the lower bridge arm switch tube Q2 are connected in series is connected to the first end of the primary winding of the first transformer 312 through the first inductor L1, and the midpoint of the bridge arm in which the upper bridge arm switch tube Q3 and the lower bridge arm switch tube Q4 are connected in series is connected to the second end of the primary winding of the first transformer 312 through the third capacitor C3. The first inductor L2 and the third capacitor C3 are arranged at both ends of the primary winding of the transformer, which is conducive to stabilizing the current, reducing harmonics, and improving the quality of the electric energy passing through the first transformer 312, thereby improving the stability of the all-in-one power supply device 30.

[0050] The first bridge arm of the secondary bridge arm circuit 313 includes an upper bridge arm switch tube Q5 and a lower bridge arm switch tube Q6, and the midpoint of the bridge arm where the upper bridge arm switch tube Q5 and the lower bridge arm switch tube Q6 are connected in series is connected to the first end of the secondary winding of the first transformer 312. The second bridge arm of the secondary bridge arm circuit 313 includes an upper bridge arm switch tube Q7 and a lower bridge arm switch tube Q8, and the midpoint of the bridge arm where the upper bridge arm switch tube Q7 and the lower bridge arm switch tube Q8 are connected in series is connected to the second end of the secondary winding of the first transformer 312 through the first switch unit 33, or is connected to the first end of the rotor winding 41 of the electromagnetic motor 40 through the first switch unit 33. The midpoint of the bridge arm of the third bridge arm of the secondary bridge arm circuit 313 is connected to the second end of the rotor winding 41. The rotor winding 41 includes a resistor R and a second inductor L2 connected in series. One end of the resistor R is connected to the midpoint of the second bridge arm through the first switch unit 33 , and one end of the second inductor L2 is connected to the midpoint of the third bridge arm.

[0051] The power factor correction circuit 34 includes an upper bridge arm switch tube Q9, a lower bridge arm switch tube Q10, an upper bridge arm switch tube Q11, a lower bridge arm switch tube Q12, an upper bridge arm switch tube Q13, a lower bridge arm switch tube Q14, and a third inductor L3 and a fourth inductor L4. Among them, the middle point of the bridge arm in which the upper bridge arm switch tube Q9 and the lower bridge arm switch tube Q10 are connected in series is connected to the first end of the AC interface through the third inductor L3, the middle point of the bridge arm in which the upper bridge arm switch tube Q11 and the lower bridge arm switch tube Q12 are connected in series is connected to the first end of the AC interface through the fourth inductor L4, and the middle point of the bridge arm in which the upper bridge arm switch tube Q13 and the lower bridge arm switch tube Q14 are connected in series is connected to the second end of the AC interface. The power factor correction circuit 34 is used to receive AC power through the AC interface, and convert the AC power into DC power and transmit it to the power conversion circuit 31. The power factor correction circuit 34 is also used to convert the DC power transmitted by the power conversion circuit 31 into AC power and output it to other AC devices through the AC interface.

[0052] In one embodiment, if Figure 3 As shown, the all-in-one power supply device 30 also includes a fourth capacitor C4 and a fifth capacitor C5, the two ends of the fourth capacitor C4 are respectively connected to the two ends of the bridge arm of the primary bridge arm circuit 311, and the two ends of the fifth capacitor C5 are respectively connected to the two ends of the bridge arm of the secondary bridge arm circuit 313. The fourth capacitor C4 and the fifth capacitor C5 are used to filter out clutter interference in the current supplying power to the power battery 10, or to filter out clutter interference in the current output by the power battery 10, which can effectively improve the stability of the all-in-one power supply device 30.

[0053] Based on the above technical solution, the two ends of the three bridge arms in the secondary bridge arm circuit 313 are connected to the two ends (HV+ and HV-) of the power battery 10 through the power battery 10 interface, and the midpoints of the first bridge arm and the second bridge arm are connected to the two ends of the secondary winding of the first transformer 312, which can constitute the charging circuit of the power battery 10. The midpoints of the second bridge arm and the third bridge arm are connected to the two ends of the rotor winding 41, which can also constitute the rotor power supply circuit of the electromagnetic motor 40. Based on two different circuits, the all-in-one power supply device 30 can charge the power battery 10 and supply power to the rotor winding 41 of the electromagnetic motor 40. When the AC charging pile is connected to the charging port of the electric vehicle 01 and charges the electric vehicle 01, the all-in-one power supply device 30 can receive AC power through the AC interface, and after converting the AC power into DC power, transmit it to the power battery 10 through the secondary bridge arm circuit 313 to realize the function of charging the power battery 10. During the driving process of the electric vehicle 01, the secondary bridge arm circuit 313 can receive the direct current output by the power battery 10 through the interface of the power battery 10, and transmit the direct current to the rotor winding 41 of the electromagnetic motor 40, thereby realizing the function of supplying power to the rotor winding 41. After the rotor winding 41 passes through the direct current, the magnetic field generated by the magnetic poles on the stator winding will generate an induced electromotive force on the rotor winding 41, driving the rotor to rotate and provide driving force for the electric vehicle 01. In this way, there is no need to set up a separate rotor winding 41 power supply circuit. By reusing the secondary bridge arm circuit 313 in the multi-in-one power supply device 30, the purpose of supplying power to the rotor winding 41 of the electromagnetic motor 40 is achieved, thereby saving the number of components of the electromagnetic motor 40 and reducing the circuit complexity of the electromagnetic motor 40.

[0054] In one embodiment, if Figure 2 and Figure 3 As shown, the first switch unit 33 is used to turn on or off the connection between one end of the secondary winding of the first transformer 312 and the midpoint of the second bridge arm, and is used to turn on or off the connection between the midpoint of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40.

[0055] In one example, if Figure 3 As shown, the first switch unit 33 is a single-pole double-throw switch. That is, the first switch unit 33 has a fixed end and two selection ends. The fixed end of the first switch unit 33 is connected to the midpoint of the bridge arm of the second bridge arm of the secondary bridge arm circuit 313, the first selection end of the first switch unit 33 is connected to one end of the secondary winding of the first transformer 312, and the second selection end of the first switch unit 33 is connected to one end of the rotor winding 41 of the electromagnetic motor 40.

[0056] When the fixed end of the first switch unit 33 is connected to the first selection end, the first switch unit 33 conducts the connection between one end of the secondary winding of the first transformer 312 and the midpoint of the second bridge arm, and disconnects the connection between the midpoint of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40; when the fixed end of the first switch unit 33 is connected to the second selection end, the first switch unit 33 conducts the connection between the midpoint of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40, and disconnects the connection between one end of the secondary winding of the first transformer 312 and the midpoint of the second bridge arm.

[0057] In another example, the first switch unit 33 includes two switches, one of the two switches is connected between one end of the secondary winding of the first transformer 312 and the midpoint of the second bridge arm, and the other of the two switches is connected between the midpoint of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40.

[0058] When the one switch is turned on, the other switch is in the off state, one end of the secondary winding of the first transformer 312 is connected to the midpoint of the second bridge arm, and the midpoint of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40 are disconnected; when the one switch is disconnected, the other switch is in the on state, one end of the secondary winding of the first transformer 312 is disconnected from the midpoint of the second bridge arm, and the midpoint of the second bridge arm is connected to one end of the rotor winding 41 of the electromagnetic motor 40.

[0059] Based on the above technical solution, by controlling the operating state of the first switch unit 33, the connection relationship between the secondary bridge arm circuit 313 and the secondary winding of the first transformer 312 and the rotor winding 41 can be controlled, so that the multi-in-one power supply device 30 can meet different usage requirements through different working states. For example, in the process of charging the power battery 10, the first switch unit 33 conducts the connection between one end of the secondary winding of the first transformer 312 and the middle point of the bridge arm of the second bridge arm, and in the process of supplying power to the rotor winding 41, the first switch unit 33 conducts the connection between the middle point of the bridge arm of the second bridge arm and one end of the rotor winding 41 of the electromagnetic motor 40.

[0060] Below Figure 3 Taking the illustrated all-in-one power supply device 30 as an example, the operating state of the all-in-one power supply device 30 is described in detail.

[0061] In one possible implementation, Figure 2 and Figure 3As shown, the above-mentioned all-in-one power supply device 30 also includes a power factor correction circuit 34. In the process of the power conversion circuit 31 charging the power battery 10, the first switch unit 33 conducts the connection between the bridge arm midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312 and disconnects the connection between the bridge arm midpoint of the second bridge arm and one end of the rotor winding 41. The power factor correction circuit 34 is used to convert the AC power output by the AC charging pile into DC power, and the power conversion circuit 31 is used to convert the voltage of the DC power output by the power factor correction circuit 34 and charge the power battery 10 through the power battery 10 interface.

[0062] During the process of the power conversion circuit 31 charging the power battery 10, the electric vehicle 01 may be in a parking state, and the rotor winding 41 does not need to work. The first switch unit 33 conducts the connection between the bridge arm midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312 and disconnects the connection between the bridge arm midpoint of the second bridge arm and one end of the rotor winding 41, that is, only the charging circuit of the power battery 10 is conducted, and the circuit for the power battery 10 to supply power to the rotor winding 41 of the electromagnetic motor 40 is disconnected. After the power factor correction circuit 34 converts the AC power output by the AC charging pile into DC power, the power conversion circuit 31 can transmit the DC power to the power battery 10 through the power battery 10 interface, so as to achieve the purpose of charging the power battery 10, avoid the power battery 10 discharging to the rotor winding 41 during the charging process, and further ensure the safety of the electric vehicle 01 during the charging process.

[0063] In another possible implementation, in the process of the all-in-one power supply device 30 receiving the direct current output by the power battery 10 through the power conversion circuit 31 to power the rotor winding 41, the first switch unit 33 turns on the connection between the midpoint of the second bridge arm of the secondary bridge arm circuit 313 and the rotor winding 41 of the electromagnetic motor 40 and disconnects the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312, and the midpoints of the second bridge arm and the third bridge arm power the rotor winding 41.

[0064] During the process of the all-in-one power supply device 30 supplying power to the rotor winding 41, the electric vehicle 01 may be in a driving state, and the AC charging pile cannot charge the power battery 10. The first switch unit 33 conducts the connection between the bridge arm midpoint of the second bridge arm of the secondary bridge arm circuit 313 and the rotor winding 41 of the electromagnetic motor 40, and disconnects the connection between the bridge arm midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312, that is, only the power supply circuit of the rotor winding 41 is conducted, and the charging circuit of the power battery 10 is disconnected. The two ends of the bridge arm of the second bridge arm and the third bridge arm receive the direct current output by the power battery 10, and after voltage conversion of the direct current, the direct current after voltage conversion is transmitted to the rotor winding 41 through the bridge arm midpoint of the second bridge arm and the bridge arm midpoint of the third bridge arm, so as to realize the purpose of supplying power to the rotor winding 41.

[0065] Figure 4 The structure of another all-in-one power supply device 30 provided in the embodiment of the present application is illustrated. Figure 4 As shown, the all-in-one power supply device 30 also includes a DC conversion circuit 35, which is used to step down the DC power output by the power battery 10, or the DC conversion circuit 35 is used to step down the DC power output by the power conversion circuit 31 during the process of the all-in-one power supply device 30 charging the power battery 10.

[0066] In one embodiment, the housing 32 also includes a first interface, and the DC conversion circuit 35 is used to connect a load or a battery through the first interface. The above-mentioned load can be other electrical equipment of the electric vehicle 01, such as vehicle-mounted electrical equipment such as wipers and headlights, or external electrical equipment such as mobile phones and tablet computers. The above-mentioned battery refers to a small storage battery other than the power battery 10 in the electric vehicle 01. The DC conversion circuit 35 is used to step down the DC power output by the power battery 10 or the DC power output by the power conversion circuit 31, and then supply power to the load or the battery through the first interface.

[0067] Based on the above technical solution, during the charging process of the power battery 10, or during the power supply process of the power battery 10, the DC conversion circuit 35 can step down the received DC power to output matching DC power to the on-board electrical equipment, external electrical equipment or the on-board small battery, thereby realizing the function of supplying power to the on-board electrical equipment and external electrical equipment, or charging the on-board small battery.

[0068] Figure 5 The example is out Figure 4 The circuit topology of the all-in-one power supply device 30 is shown in FIG.

[0069] In one embodiment, if Figure 5As shown, the DC conversion circuit 35 includes a second transformer T2 and a secondary circuit. The two ends of the primary winding of the second transformer T2 are respectively used to connect the bridge arm midpoint of the first bridge arm and the bridge arm midpoint of the third bridge arm of the secondary bridge arm circuit 313, and the secondary winding of the second transformer T2 is used to power the secondary circuit.

[0070] The secondary circuit includes an upper bridge arm switch tube Q15, a lower bridge arm switch tube Q16, a fifth inductor L5 and a sixth capacitor C6. In a possible embodiment, the two ends of the upper bridge arm switch tube Q15 and the lower bridge arm switch tube Q16 are connected to the two ends of the secondary winding of the second transformer T2, the fifth inductor L5 and the sixth capacitor C6 are connected in series, and are connected between the midpoint of the secondary winding of the second transformer T2 and the connection point of the upper bridge arm switch tube Q15 and the lower bridge arm switch tube Q16, and the voltage across the sixth capacitor C6 is the voltage output by the DC conversion circuit 35.

[0071] In one example, one end of the primary winding of the second transformer T2 is used to be connected to the midpoint of the bridge arm of the third bridge arm through the seventh capacitor C7, and the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the first bridge arm through the switch K. When the switch K is turned on, the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the first bridge arm, and the first bridge arm and the third bridge arm of the secondary conversion circuit are used to supply power to the primary winding of the second transformer T2. When the switch K is turned off, the other end of the primary winding of the second transformer T2 is disconnected from the midpoint of the bridge arm of the first bridge arm, and the first bridge arm and the third bridge arm of the secondary conversion circuit do not supply power to the primary winding of the second transformer T2.

[0072] When the DC conversion circuit 35 is used to step down the DC power output by the power battery 10, the first transformer 312 in the power conversion circuit 31 is in an idle state. At this time, the first bridge arm in the power conversion circuit 31 is also in an idle state. By controlling the switch K to be closed, the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the first bridge arm. The first bridge arm and the third bridge arm simultaneously constitute the primary circuit of the second transformer T2, and can supply power to the primary winding of the second transformer T2, which saves the electrical components of the second transformer T2 to a certain extent, helps to reduce the circuit complexity, and improves the integration of the all-in-one power supply device 30.

[0073] During the process of the DC conversion circuit 35 being used to step down the DC power output by the power conversion circuit 31, that is, during the process of charging the power battery 10, the first bridge arm in the power conversion circuit 31 is in a working state, and is used to convert the current and voltage output to the power battery 10. By controlling the switch K to be disconnected, the other end of the primary winding of the second transformer T2 is disconnected from the midpoint of the bridge arm of the first bridge arm, thereby avoiding affecting the charging of the power battery 10 and improving the safety of the power battery 10 during the charging process.

[0074] Figure 6 The structure of another all-in-one power supply device 30 provided in an embodiment of the present application is illustrated. Figure 7 for Figure 6 Circuit topology diagram of the all-in-one power supply device 30.

[0075] like Figure 6 As shown, the all-in-one power supply device 30 also includes a three-phase inverter circuit 36, and the midpoints of the three bridge arms of the three-phase inverter circuit 36 ​​are respectively used to connect the three-phase winding 42 of the stator of the electromagnetic motor 40. Among them, the three-phase inverter circuit 36 ​​includes a three-phase bridge arm, and the two ends of the bridge arm of the three-phase bridge arm are used to connect to the two ends of the power battery 10 through the power battery 10 interface on the housing 32. The three-phase inverter circuit 36 ​​is used to receive the direct current output by the power battery 10 and supply power to the three-phase winding 42 of the stator to drive the electromagnetic motor 40 to rotate.

[0076] like Figure 7 As shown, each of the three-phase bridge arms includes two switch tubes in series with the same freewheeling direction. For example, the first phase bridge arm includes an upper bridge arm switch tube Q17 and a lower bridge arm switch tube Q18, the second phase bridge arm includes an upper bridge arm switch tube Q19 and a lower bridge arm switch tube Q20, and the third phase bridge arm includes an upper bridge arm switch tube Q21 and a lower bridge arm switch tube Q22.

[0077] In another embodiment, if Figure 7 As shown, the DC conversion circuit 35 includes a second transformer T2 and a secondary circuit. The two ends of the primary winding of the second transformer T2 are respectively used to connect the bridge arm midpoint of the third bridge arm of the secondary bridge arm circuit 313 and the bridge arm midpoint of one-phase bridge arm of the three-phase inverter circuit 36. As an example but not a limitation, the embodiment of the present application is described by taking the one-phase bridge arm as the third phase bridge arm in the three-phase inverter circuit 36 ​​as an example.

[0078] In one example, one end of the primary winding of the second transformer T2 is used to be connected to the midpoint of the bridge arm of the third bridge arm through the seventh capacitor C7, and the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the third phase bridge arm of the three-phase inverter circuit 36 ​​through the switch K. When the switch K is turned on, the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the third phase bridge arm, and the third bridge arm and the third phase bridge arm of the secondary conversion circuit are used to supply power to the primary winding of the second transformer T2. When the switch K is turned off, the other end of the primary winding of the second transformer T2 is disconnected from the midpoint of the bridge arm of the third phase bridge arm, and the third bridge arm of the secondary conversion circuit and the third phase bridge arm of the three-phase inverter circuit 36 ​​do not supply power to the primary winding of the second transformer T2.

[0079] During the process of the DC conversion circuit 35 being used to step down the DC power output by the power conversion circuit 31, that is, during the process of charging the power battery 10, the three-phase bridge arms in the three-phase inverter circuit 36 ​​are all in an idle state. By controlling the switch K to be closed, the other end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of the third phase bridge arm. The third-phase bridge arm and the third bridge arm simultaneously constitute the primary circuit of the second transformer T2, and can supply power to the primary winding of the second transformer T2, which saves the electrical components of the second transformer T2 to a certain extent, is conducive to reducing the circuit complexity, and improving the integration of the all-in-one power supply device 30.

[0080] During the process in which the DC conversion circuit 35 is used to step down the DC power output by the power battery 10, the three-phase bridge arm in the three-phase inverter circuit 36 ​​may be in an idle state. For example, when driving, the three-phase inverter circuit 36 ​​is used to supply power to the three-phase winding 42 of the stator of the electromagnetic motor 40. By controlling the switch K to disconnect, the other end of the primary winding of the second transformer T2 is disconnected from the midpoint of the bridge arm of the three-phase inverter circuit 36, thereby avoiding affecting the driving of the electromagnetic motor 40 by the three-phase inverter circuit 36, thereby improving the driving safety of the electric vehicle 01.

[0081] In a possible embodiment, the all-in-one power supply device 30 also includes a control circuit board (not shown) located in the shell 32, which is used to control each switch tube in the three-phase inverter circuit 36 ​​and each switch tube in the secondary bridge arm circuit 313.

[0082] The control circuit board may be a chip. For example, the control circuit board may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a micro controller unit (MCU), a programmable logic device (PLD) or other integrated chips.

[0083] It can be seen from the above scheme that the six switch tubes in the three-phase inverter circuit 36 ​​form a three-phase bridge arm for supplying power to the three-phase winding 42 of the stator, and each switch tube in the secondary bridge arm circuit 313 forms three bridge arms, two of which can also be reused to supply power to the rotor winding 41 of the electromagnetic motor 40. Each switch tube in the three-phase inverter circuit 36 ​​and each switch tube in the secondary bridge arm circuit 313 are controlled by the same control circuit board, which not only saves the device volume and cost of the control circuit board, but also solves the problem of matching the excitation current of the rotor winding 41 with the current of the three-phase winding 42 of the stator. For example, when the electric vehicle 01 is running at high speed, the control circuit board can simultaneously reduce the stator current and the rotor current.

[0084] In another embodiment, the function of the above-mentioned control circuit board can also be implemented by a vehicle control unit (VCU) in the electric vehicle 0101, and the embodiment of the present application does not impose any specific restrictions on this.

[0085] Figure 8 The structure of another all-in-one power supply device 30 provided in an embodiment of the present application is illustrated. Fig. 9 for Figure 8 Circuit topology diagram of the all-in-one power supply device 30.

[0086] like Figure 8 and Fig. 9As shown, the DC conversion circuit 35 includes a second transformer T2 and a secondary circuit. One end of the primary winding of the second transformer T2 is used to connect the bridge arm midpoint of the third bridge arm, and the other end of the primary winding of the second transformer T2 is used to connect the bridge arm midpoint of the first bridge arm and the bridge arm midpoint of one phase bridge arm of the three-phase inverter circuit 36 ​​through the second switch unit 37, and the secondary winding of the second transformer T2 is used to power the secondary circuit.

[0087] Among them, the circuit structure of the secondary circuit is the same as the circuit structure in the above-mentioned embodiment, and will not be described in detail here.

[0088] In one example, if Fig. 9 As shown, the second switch unit 37 is a single-pole double-throw switch. That is, the second switch unit 37 has a fixed end and two selection ends. The fixed end of the second switch unit 37 is connected to one end of the primary winding of the second transformer T2, the first selection end of the second switch unit 37 is connected to the bridge arm midpoint of the first bridge arm of the secondary bridge arm circuit 313, and the second selection end of the second switch unit 37 is connected to the bridge arm midpoint of one phase bridge arm of the three-phase inverter circuit 36.

[0089] When the fixed end of the second switch unit 37 is connected to the first selection end, the second switch unit 37 conducts the connection between one end of the primary winding of the second transformer T2 and the midpoint of the first bridge arm of the secondary bridge arm circuit 313, and disconnects the connection between one end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36; when the fixed end of the second switch unit 37 is connected to the second selection end, the second switch unit 37 conducts the connection between one end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36, and disconnects the connection between one end of the primary winding and the midpoint of the bridge arm of the first bridge arm of the secondary bridge arm circuit 313.

[0090] In another example, the second switch unit 37 includes two switches, one of the two switches is connected between one end of the primary winding of the second transformer T2 and the midpoint of the first bridge arm of the secondary bridge arm circuit 313, and the other of the two switches is connected between one end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36.

[0091] When the one switch is turned on, the other switch is in the off state, one end of the primary winding of the second transformer T2 is connected to the midpoint of the first bridge arm of the secondary bridge arm circuit 313, and one end of the primary winding of the second transformer T2 is disconnected from the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36; when the one switch is disconnected, the other switch is in the on state, one end of the primary winding of the second transformer T2 is disconnected from the midpoint of the first bridge arm of the secondary bridge arm circuit 313, and one end of the primary winding of the second transformer T2 is connected to the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36.

[0092] Based on the above technical solution, by controlling the operating state of the second switch unit 37, the connection relationship between the secondary winding of the second transformer T2 and the first bridge arm of the secondary bridge arm circuit 313 and the bridge arm of one phase in the three-phase inverter circuit 36 ​​can be controlled, so that the multi-in-one power supply device 30 can meet different usage requirements through different working states. For example, in the process of charging the power battery 10, the second switch unit 37 conducts the connection between one end of the secondary winding of the second transformer T2 and the midpoint of the bridge arm of one phase in the three-phase inverter circuit 36, and in the process of supplying power to the three-phase winding 42 of the stator, the second switch unit 37 conducts the connection between one end of the secondary winding of the second transformer T2 and the midpoint of the bridge arm of the first bridge arm.

[0093] Below Fig. 9 Taking the illustrated all-in-one power supply device 30 as an example, the operation status of the all-in-one power supply device 30 is described in detail.

[0094] In one example, the DC conversion circuit 35 is used to step down the DC power output by the power battery 10, and the second switch unit 37 turns on the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of the first bridge arm and turns off the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36. The third bridge arm and the bridge arm of one phase of the three-phase inverter circuit 36 ​​are used to power the primary winding of the second transformer T2.

[0095] In the process of the DC conversion circuit 35 being used to step down the DC power output by the power battery 10, the electric vehicle 01 may be in a driving state, the secondary bridge arm circuit 313 of the power conversion circuit 31 is in an idle state, and the three-phase inverter circuit 36 ​​is used to supply power to the three-phase winding 42 of the stator. The second switch unit 37 conducts the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of the first bridge arm and disconnects the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36, that is, the connection with the three-phase inverter circuit 36 ​​is disconnected, and only the connection with the first bridge arm of the secondary bridge arm circuit 313 is conducted. The first bridge arm and the third bridge arm receive the DC power output by the power battery 10 at both ends of the bridge arm, and after voltage conversion of the DC power, the DC power after voltage conversion is transmitted to the primary winding of the second transformer T2 through the midpoint of the bridge arm of the first bridge arm and the midpoint of the bridge arm of the third bridge arm, and power is supplied to the primary winding of the second transformer T2, thereby achieving the purpose of powering the load or the battery.

[0096] In the second example, the DC conversion circuit 35 is used to step down the DC power output by the power conversion circuit 31, and the second switch unit 37 disconnects the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of the first bridge arm and connects the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36. The third bridge arm and the first bridge arm are used to power the primary winding of the second transformer T2.

[0097] In the process of the DC conversion circuit 35 being used to step down the DC power output by the power conversion circuit 31, the electric vehicle 01 may be in a parking state, the three-phase winding 42 of the stator does not need to work, the secondary bridge arm circuit 313 of the power conversion circuit 31 is in a working state, and the three-phase inverter circuit 36 ​​is in an idle state. The second switch unit 37 conducts the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36 ​​and cuts off the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of the first bridge arm, that is, only the connection with the three-phase inverter circuit 36 ​​is conducted, and the connection with the first bridge arm of the secondary bridge arm circuit 313 is disconnected. The third bridge arm and the two ends of the bridge arm of the three-phase inverter circuit 36 ​​receive the direct current transmitted to the power battery 10 by the power conversion circuit 31, and after voltage conversion of the direct current, the direct current after voltage conversion is transmitted to the primary winding of the second transformer T2 through the midpoint of the bridge arm of the third bridge arm and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36, and power is supplied to the primary winding of the second transformer T2, thereby achieving the purpose of powering the load or the battery.

[0098] In a possible embodiment, the above-mentioned all-in-one control device may also include a switch controller (not shown) for controlling the first switch unit 33 or the second switch unit 37, which is used to control the operating state of the above-mentioned first switch unit 33 or the second switch unit 37.

[0099] For example, in the process of the power conversion circuit 31 charging the power battery 10, the first switch unit 33 is controlled to turn on the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312, and the first switch unit 33 is controlled to disconnect the connection between the midpoint of the second bridge arm and one end of the rotor winding 41; at the same time, the second switch unit 37 is controlled to turn off the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the first bridge arm, and the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the bridge arm of one phase of the three-phase inverter circuit 36 ​​is controlled to be turned on.

[0100] For another example, in the process of the multi-in-one power supply device 30 supplying power to the rotor winding 41, the switch controller is used to control the first switch unit 33 to turn on the connection between the midpoint of the second bridge arm of the secondary bridge arm circuit 313 and the rotor winding 41 of the electromagnetic motor 40, and control the first switch unit 33 to disconnect the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer 312; at the same time, control the second switch unit 37 to turn on the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the first bridge arm, and control the second switch unit 37 to disconnect the connection between the other end of the primary winding of the second transformer T2 and the midpoint of the first bridge arm of the one-phase bridge arm of the three-phase inverter circuit 36.

[0101] In another possible embodiment, the functions performed by the switch controller may be implemented by the control circuit board or VCU, which is not specifically limited in the embodiment of the present application.

[0102] In another embodiment of the present application, an all-in-one powertrain 20 is also provided, the all-in-one powertrain 20 includes an electromagnetic motor 40 and an all-in-one power supply device 30 provided in the above embodiment, the all-in-one power supply device 30 includes a power conversion circuit 31 and a three-phase inverter circuit 36. The power conversion circuit 31 includes a primary bridge arm circuit 311, a first transformer 312 and a secondary bridge arm circuit 313. The primary bridge arm circuit 311 includes two bridge arms, and the midpoints of the bridge arms of the two bridge arms are respectively used to connect the two ends of the primary winding of the first transformer 312. The secondary bridge arm circuit 313 includes a first bridge arm, a second bridge arm and a third bridge arm. The midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer 312, the midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer 312 and one end of the rotor winding 41 of the electromagnetic motor 40 through the first switch unit 33, and the midpoint of the third bridge arm is used to connect the other end of the rotor winding 41; the three bridge arm midpoints of the three-phase inverter circuit 36 ​​are respectively used to connect the three-phase winding 42 of the stator of the electromagnetic motor 40.

[0103] In another embodiment of the present application, an electric vehicle 01 is also provided, which includes a power battery 10 and the all-in-one power assembly 20 provided in the above embodiment, and the all-in-one power assembly 20 is used to receive alternating current to charge the power battery 10, or the power battery 10 supplies power to the all-in-one power assembly 20.

[0104] Finally, it should be noted that the above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An all-in-one power supply device, characterized in that: The all-in-one power supply device is used to receive the AC power outputted by the AC charging pile and convert the AC power into DC power to charge the power battery, and is used to receive the DC power outputted by the power battery through the power conversion circuit to power the rotor winding of the electric excitation motor. The all-in-one power supply device includes: at least one circuit board, the at least one circuit board being used to carry electrical components of the power conversion circuit, a housing, the housing being used to accommodate at least one circuit board, the housing further comprising a power battery interface for connecting a power battery, the all-in-one power supply device charging the power battery or receiving power from the power battery through the power battery interface; The power conversion circuit includes a primary bridge arm circuit, a first transformer and a secondary bridge arm circuit; wherein: The primary bridge arm circuit comprises two bridge arms, and the midpoints of the two bridge arms are respectively used to connect two ends of the primary winding of the first transformer; The secondary bridge arm circuit includes a first bridge arm, a second bridge arm and a third bridge arm. The midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer, the midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer and one end of the rotor winding through a first switching unit, and the midpoint of the third bridge arm is used to connect the other end of the rotor winding.

2. The all-in-one power supply device according to claim 1, characterized in that: The third bridge arm of the secondary bridge arm circuit includes a first capacitor and a second capacitor connected in series.

3. The all-in-one power supply device according to claim 1 or 2, characterized in that: The first switch unit is used to turn on or off the connection between one end of the secondary winding of the first transformer and the midpoint of the second bridge arm, and to turn on or off the connection between the midpoint of the second bridge arm and one end of the rotor winding of the electromagnetic motor.

4. The all-in-one power supply device according to claim 3, characterized in that: The all-in-one power supply device also includes a power factor correction circuit; During the process of the power conversion circuit charging the power battery, the first switch unit turns on the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer and disconnects the connection between the midpoint of the second bridge arm and one end of the rotor winding. The power factor correction circuit is used to convert the AC power output by the AC charging pile into DC power. The power conversion circuit is used to perform voltage conversion on the DC power output by the power factor correction circuit and charge the power battery through the power battery interface.

5. The all-in-one power supply device according to claim 3, characterized in that: In the process of the all-in-one power supply device receiving the direct current output by the power battery through the power conversion circuit to power the rotor winding, the first switch unit switches on the connection between the midpoint of the second bridge arm of the secondary bridge arm circuit and the rotor winding of the electromagnetic motor and disconnects the connection between the midpoint of the second bridge arm and one end of the secondary winding of the first transformer, and the midpoints of the second bridge arm and the third bridge arm power the rotor winding.

6. The all-in-one power supply device according to any one of claims 1 to 5, characterized in that: The all-in-one power supply device also includes a DC conversion circuit, which is used to step down the DC power output by the power battery, or the DC conversion circuit is used to step down the DC power output by the power conversion circuit during the process of the all-in-one power supply device charging the power battery.

7. The all-in-one power supply device according to claim 6, characterized in that: The DC conversion circuit includes a second transformer and a secondary circuit; wherein: Two ends of the primary winding of the second transformer are respectively used to connect the bridge arm midpoint of the first bridge arm of the secondary bridge arm circuit and the bridge arm midpoint of the third bridge arm; The secondary winding of the second transformer is used to supply power to the secondary circuit.

8. The all-in-one power supply device according to claim 6, characterized in that: The all-in-one power supply device also includes a three-phase inverter circuit, and the midpoints of the three bridge arms of the three-phase inverter circuit are respectively used to connect the three-phase windings of the stator of the electromagnetic motor.

9. The all-in-one power supply device according to claim 8, characterized in that: The DC conversion circuit includes a second transformer and a secondary circuit; wherein: The two ends of the primary winding of the second transformer are respectively used to connect the bridge arm midpoint of the third bridge arm of the secondary bridge arm circuit and the bridge arm midpoint of one-phase bridge arm of the three-phase inverter circuit.

10. The all-in-one power supply device according to claim 8, characterized in that: The DC conversion circuit includes a second transformer and a secondary circuit; wherein: One end of the primary winding of the second transformer is used to connect the bridge arm midpoint of the third bridge arm; The other end of the primary winding of the second transformer is used to connect the bridge arm midpoint of the first bridge arm and the bridge arm midpoint of one phase bridge arm of the three-phase inverter circuit through the second switch unit; The secondary winding of the second transformer is used to supply power to the secondary circuit.

11. The all-in-one power supply device according to claim 10, characterized in that: In the process where the DC conversion circuit is used to step down the DC power output by the power battery, the second switch unit switches on the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of the first bridge arm and switches off the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of one phase of the three-phase inverter circuit; the third bridge arm and the bridge arm of one phase of the three-phase inverter circuit are used to supply power to the primary winding of the second transformer.

12. The all-in-one power supply device according to claim 10, characterized in that: The DC conversion circuit is used to step down the DC power output by the power conversion circuit. The second switch unit disconnects the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of the first bridge arm and connects the connection between the other end of the primary winding of the second transformer and the midpoint of the bridge arm of one phase of the three-phase inverter circuit. The third bridge arm and the first bridge arm are used to supply power to the primary winding of the second transformer.

13. The all-in-one power supply device according to any one of claims 8 to 12, characterized in that: The all-in-one power supply device also includes a control circuit board located in the shell, and the control circuit board is used to control each switch tube in the three-phase inverter circuit and each switch tube in the secondary bridge arm circuit.

14. An all-in-one powertrain, characterized in that: The all-in-one powertrain comprises an electrically excited motor and the all-in-one power supply device according to any one of claims 1 to 13, wherein the all-in-one power supply device comprises a power conversion circuit and a three-phase inverter circuit; The power conversion circuit includes a primary bridge arm circuit, a first transformer and a secondary bridge arm circuit, wherein: The primary bridge arm circuit comprises two bridge arms, and the midpoints of the two bridge arms are respectively used to connect two ends of the primary winding of the first transformer; The secondary bridge arm circuit comprises a first bridge arm, a second bridge arm and a third bridge arm, wherein the bridge arm midpoint of the first bridge arm is used to connect one end of the secondary winding of the first transformer, the bridge arm midpoint of the second bridge arm is used to connect the other end of the secondary winding of the first transformer and one end of the rotor winding of the electromagnetic motor through the first switch unit, and the bridge arm midpoint of the third bridge arm is used to connect the other end of the rotor winding; The three bridge arm midpoints of the three-phase inverter circuit are respectively used to connect the three-phase windings of the stator of the electromagnetic motor.

15. An electric vehicle, characterized in that: The electric vehicle comprises a power battery and the all-in-one powertrain as claimed in claim 14, wherein the all-in-one powertrain is used to receive alternating current to charge the power battery, or the power battery supplies power to the all-in-one powertrain.

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