Vehicle control method, medium, controller and vehicle

Abstract

Provided is a vehicle, comprising a vehicle high-voltage circuit (1).The vehicle high-voltage circuit (1) comprises an alternating-current power supply (10), an on-board charger (20), a power battery (30) and a compressor module (40); the alternating-current power supply (10), the on-board charger (20) and the power battery (30) are sequentially connected; the compressor module (40) comprises a first quantity of compressor windings and a second quantity of compressor half-bridges, wherein the first quantity is greater than the second quantity; and a first convergence end formed by connecting the compressor half-bridges in parallel is connected to a positive electrode of the power battery (30), first ends of the compressor windings are connected together, the compressor half-bridges have one-to-one correspondence to target compressor windings, the middle point of each compressor half-bridge is connected to a second end of the corresponding target compressor winding, and a second end of a remaining compressor winding is connected to the on-board charger (20).

Description

Vehicle control method, medium, controller and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on August 28, 2023, with application number 202322332511.0 and title “Vehicle High-Voltage Circuit and Vehicle,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of vehicles, and in particular, to a vehicle high-voltage circuit and a vehicle. Background Art

[0004] Onboard chargers and compressors are essential components of electric vehicles. Currently, these systems require numerous parts and wiring harnesses, increasing the probability of failure in the vehicle's high-voltage system and occupying a significant amount of space and mass within the vehicle.

[0005] Summary of the Invention

[0006] The present disclosure aims to provide a vehicle high-voltage circuit and a vehicle to improve the integration level of an on-board charger and a compressor.

[0007] To achieve the above objectives, the present disclosure provides, in a first aspect, a vehicle high-voltage circuit, comprising an AC power supply, an on-board charger, a power battery, and a compressor module:

[0008] The AC power supply, the on-board charger and the power battery are connected in sequence;

[0009] The compressor module comprises a first number of compressor windings and a second number of compressor half-bridges, wherein the first number is greater than the second number, and the compressor windings comprise the second number of target compressor windings and a third number of remaining compressor windings;

[0010] The first bus end of the compressor half-bridges after being connected in parallel is connected to the positive electrode of the power battery, the first ends of the compressor windings are connected in common, the compressor half-bridges correspond to the target compressor windings one-to-one, the midpoint of each compressor half-bridge is connected to the second end of the corresponding target compressor winding, and the second ends of the remaining compressor windings are connected to the on-board charger to reuse the half-bridge in the on-board charger as the compressor half-bridge corresponding to the remaining compressor windings.

[0011] Optionally, the vehicle high-voltage circuit further includes a controller,

[0012] The controller is connected to the compressor module and the on-board charger, and is used to control the compressor half-bridge and the on-board charger to charge and discharge the AC power supply and the power battery.

[0013] Optionally, the on-board charger includes:

[0014] A PFC circuit, connected to the AC power supply, for converting AC power into DC power;

[0015] A DCDC converter is connected to the output end of the PFC circuit, the compressor module and the power battery, and is used to achieve DC voltage conversion.

[0016] Optionally, the DCDC converter includes a primary circuit, a transformer and a secondary circuit;

[0017] The primary circuit is connected to the PFC circuit and the transformer;

[0018] The secondary circuit is connected to the transformer and the power battery.

[0019] Optionally, the primary circuit includes a bus capacitor, a first primary half-bridge, a second primary half-bridge, a first resonant capacitor, and a first resonant inductor;

[0020] The bus capacitor, the first primary half-bridge and the second primary half-bridge are connected in parallel, and the midpoint between the first primary half-bridge and the second primary half-bridge is connected to a series circuit of a first resonant capacitor, a first resonant inductor and the primary winding of the transformer.

[0021] Optionally, the secondary circuit includes a DC filter capacitor, a first secondary half-bridge, a second secondary half-bridge, a second resonant capacitor, and a second resonant inductor;

[0022] The first secondary half-bridge, the second secondary half-bridge and the DC filter capacitor are connected in parallel, and a midpoint between the first secondary half-bridge and the second secondary half-bridge is connected to a series circuit consisting of a second resonant capacitor, a second resonant inductor and the secondary winding of the transformer;

[0023] The DC filter capacitor is connected in parallel with the power battery.

[0024] Optionally, each of the remaining compressor windings corresponds to a phase secondary half-bridge, and the second end of each of the remaining compressor windings is connected to the midpoint of the corresponding phase secondary half-bridge to reuse the secondary half-bridge as the compressor half-bridge corresponding to the remaining compressor windings, wherein the sum of the number of the secondary half-bridges and the second number is greater than or equal to the first number.

[0025] Optionally, the PFC circuit includes:

[0026] One-phase power frequency half-bridge;

[0027] At least one phase correction half-bridge, wherein the at least one phase correction half-bridge is connected in parallel with the power frequency half-bridge and the bus capacitor of the primary circuit of the DCDC converter;

[0028] At least one correction winding, wherein the correction winding corresponds to the correction half-bridge one by one, the first end of each correction winding is connected to the midpoint of the corresponding correction half-bridge, the second ends of the correction windings are connected together and then connected to one end of the AC power supply, and the other end of the AC power supply is connected to the midpoint of the power frequency half-bridge.

[0029] Optionally, the vehicle high-voltage circuit further includes a heating module,

[0030] The heating module is connected to the compressor module and the controller.

[0031] Optionally, the heating module includes a first heating power device, a second heating power device, a first resistor and a second resistor.

[0032] The first heating power device and the first resistor are connected in series to form a first heating branch, and the second heating power device and the second resistor are connected in series to form a second heating branch;

[0033] The first heating branch, the second heating branch and the compressor half-bridge are connected in parallel.

[0034] A second aspect of the present disclosure provides a vehicle, which includes the vehicle high-voltage circuit provided by the first aspect of the present disclosure.

[0035] In the above technical solution, an AC power source, an onboard charger, and a power battery are connected in sequence; the compressor module includes a first number of compressor windings and a second number of compressor half-bridges, wherein the first number is greater than the second number, and the compressor windings include a second number of target compressor windings and a third number of remaining compressor windings; the first bus terminal of the parallel-connected compressor half-bridges is connected to the positive electrode of the power battery, the first ends of the compressor windings are connected in common, the compressor half-bridges correspond one-to-one with the target compressor windings, the midpoint of each compressor half-bridge is connected to the second end of the corresponding target compressor winding, and the second ends of the remaining compressor windings are connected to the onboard charger. In this way, the half-bridges in the onboard charger can be reused as the compressor half-bridges corresponding to the remaining compressor windings, thereby improving the integration of the onboard charger and the compressor, reducing the number of electrical components in the onboard charger and the compressor, and the wiring harnesses connecting the electrical components, simplifying the structure of the vehicle's high-voltage circuit, reducing the probability of failure of the vehicle's high-voltage system, and reducing the volume and mass of the vehicle's high-voltage system.

[0036] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0038] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0039] FIG1 is a block diagram of a vehicle high-voltage circuit according to an exemplary embodiment of the present disclosure.

[0040] FIG2 is a schematic diagram of a vehicle high-voltage circuit according to an exemplary embodiment of the present disclosure.

[0041] FIG3 is a circuit diagram of a DCDC converter and a compressor module according to an exemplary embodiment of the present disclosure.

[0042] FIG4 is a schematic diagram of current flow when a power battery supplies power to a compressor module according to an exemplary embodiment of the present disclosure.

[0043] FIG5 is a schematic diagram of current flow when an AC power source charges a power battery according to an exemplary embodiment of the present disclosure.

[0044] FIG6 is a schematic diagram of current flow when a power battery charges an AC power source according to an exemplary embodiment of the present disclosure.

[0045] FIG7 is a circuit diagram of a vehicle high-voltage circuit provided by an exemplary embodiment of the present disclosure.

[0046] FIG8 is a schematic diagram of a vehicle provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0047] The specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0048] FIG1 is a block diagram of a vehicle high-voltage circuit 1 according to an exemplary embodiment of the present disclosure. As shown in FIG1 , the vehicle high-voltage circuit 1 includes an AC power source 10 , an on-board charger (OBC) 20 , a power battery 30 , and a compressor module 40 .

[0049] The AC power source 10, the onboard charger 20 and the power battery 30 are connected in sequence;

[0050] A compressor module 40 comprising a first number of compressor windings and a second number of compressor half-bridges, wherein the first number is greater than the second number, the compressor windings comprising a second number of target compressor windings and a third number of remaining compressor windings;

[0051] The first bus end of the compressor half-bridges after parallel connection is connected to the positive pole of the power battery 30, the first ends of the compressor windings are connected in common, the compressor half-bridges correspond to the target compressor windings one-to-one, the midpoint of each compressor half-bridge is connected to the second end of the corresponding target compressor winding, and the second ends of the remaining compressor windings are connected to the on-board charger 20 to reuse the half-bridge in the on-board charger 20 as the compressor half-bridge corresponding to the remaining compressor windings.

[0052] By way of example, the AC power source 10 may be a 220V AC power source, and the power battery 30 may include multiple batteries connected in series. A half-bridge is a circuit structure in which two power devices are connected in a totem pole configuration, with the midpoint serving as the output. As shown in FIG2 , the compressor half-bridge may include: a first compressor half-bridge comprising a first power device Q1 and a second power device Q2, and a second compressor half-bridge comprising a third power device Q3 and a fourth power device Q4. The number of compressor half-bridges in the compressor module 40 in FIG2 is two, meaning the second number may be two. By way of example, the compressor windings in the compressor module 40 may be air conditioner motor windings, which may be a three-phase motor, meaning the first number may be three. The third number is the difference between the first number and the second number. Accordingly, in FIG2 , the compressor windings may include two target compressor windings and one remaining compressor winding. The target compressor windings may be the A-phase winding and the B-phase winding in FIG2 , and the remaining compressor winding may be the C-phase winding in FIG2 .

[0053] In the plane shown in Figure 2, the first end of each compressor winding is the left end, and the second end is the right end. The first busbar of the compressor half-bridge is the upper right busbar of the compressor half-bridges connected in parallel. The second end of the A-phase winding is connected to the midpoint of the first compressor half-bridge, the second end of the B-phase winding is connected to the midpoint of the second compressor half-bridge, and the second end of the C-phase winding can be connected to the onboard charger 20. The onboard charger 20 can be used to convert DC power into AC power and convert DC voltage into DC voltage. To achieve these functions, the onboard charger 20 includes a large number of rectifier / inverter modules, that is, multiple half-bridge structures. The compressor half-bridge in the compressor module 40 also performs rectification and inversion functions. Therefore, by connecting the second end of the C-phase winding to the onboard charger 20, the half-bridge in the onboard charger 20 can be reused as the compressor half-bridge corresponding to the C-phase winding.

[0054] Reusing the half-bridge in the onboard charger 20 as the compressor half-bridge for the remaining compressor windings improves the integration of the onboard charger and compressor, reduces the number of electrical components in the onboard charger and compressor, and ensures their normal operation. The reduction in electrical components (power devices) also reduces the number of wiring harnesses and connectors used to connect them, simplifying the structure of the vehicle's high-voltage circuit. This simplified circuit structure reduces the likelihood of short circuits caused by wear between wiring harnesses, reduces interference signals between lines, avoids affecting information transmission in the wiring harness, and reduces the probability of failure in the vehicle's high-voltage system. It also effectively reduces the volume and mass of the vehicle's high-voltage system, improving the transport capacity and space utilization of electric vehicles to a certain extent.

[0055] In the above technical solution, an AC power source, an onboard charger, and a power battery are connected in sequence; the compressor module includes a first number of compressor windings and a second number of compressor half-bridges, wherein the first number is greater than the second number, and the compressor windings include a second number of target compressor windings and a third number of remaining compressor windings; the first bus terminal of the parallel-connected compressor half-bridges is connected to the positive electrode of the power battery, the first ends of the compressor windings are connected in common, the compressor half-bridges correspond one-to-one with the target compressor windings, the midpoint of each compressor half-bridge is connected to the second end of the corresponding target compressor winding, and the second ends of the remaining compressor windings are connected to the onboard charger. In this way, the half-bridges in the onboard charger can be reused as the compressor half-bridges corresponding to the remaining compressor windings, thereby improving the integration of the onboard charger and the compressor, reducing the number of electrical components in the onboard charger and the compressor, and the wiring harnesses connecting the electrical components, simplifying the structure of the vehicle's high-voltage circuit, reducing the probability of failure of the vehicle's high-voltage system, and reducing the volume and mass of the vehicle's high-voltage system.

[0056] In an optional embodiment, the vehicle high-voltage circuit 1 may further include a controller,

[0057] The controller is connected to the compressor module 40 and the on-board charger 20 and is used to control the compressor half-bridge and the on-board charger 20 so as to charge and discharge the AC power source 10 and the power battery 30 .

[0058] For example, the controller can control the on and off of the power devices in the compressor module 40, and can also control the on and off of the power devices in the vehicle-mounted charger 20. In this way, the controller can control the AC power supply 10 to charge the power battery 30, can control the power battery 30 to charge the AC power supply 10, and can also control the power battery 30 to provide power to the compressor module 40.

[0059] Optionally, as shown in FIG2 , the onboard charger 20 may include:

[0060] A PFC (Power Factor Correction) circuit 201, which is connected to the AC power supply 10 and is used to convert AC power into DC power;

[0061] The DCDC converter (DC converter) 202 is connected to the output end of the PFC circuit 201, the compressor module 40 and the power battery 30 to realize DC voltage conversion.

[0062] Optionally, the DCDC converter 202 may include a primary circuit 2021 , a transformer 2022 , and a secondary circuit 2023 ;

[0063] The primary circuit 2021 is connected to the PFC circuit 201 and the transformer 2022;

[0064] The secondary circuit 2023 is connected to the transformer 2022 and the power battery 30 .

[0065] Optionally, the primary circuit 2021 may include a bus capacitor C1, a first primary half-bridge, a second primary half-bridge, a first resonant capacitor C3, and a first resonant inductor L1;

[0066] The bus capacitor C1, the first primary half-bridge and the second primary half-bridge are connected in parallel, and the midpoint between the first primary half-bridge and the second primary half-bridge is connected to a series circuit of the first resonant capacitor C3, the first resonant inductor L1 and the primary winding of the transformer 2022.

[0067] As shown in FIG3 , the first primary half-bridge may be composed of a fifth power device Q5 and a sixth power device Q6, and the second primary half-bridge may be composed of a seventh power device Q7 and an eighth power device Q8. One end of the first resonant capacitor C3 may be connected to the midpoint of the first primary half-bridge, the other end of the first resonant capacitor C3 may be connected to the first end of the first resonant inductor L1 (the left end of the first resonant inductor L1 in the plane direction shown in FIG3 ), the second end of the first resonant inductor L1 (the right end of the first resonant inductor L1 in the plane direction shown in FIG3 ) may be connected to one end of the primary winding of the transformer 2022, and the other end of the primary winding of the transformer 2022 may be connected to the midpoint of the second primary half-bridge.

[0068] Optionally, the secondary circuit 2023 includes a DC filter capacitor C2, a first secondary half-bridge, a second secondary half-bridge, a second resonant capacitor C4, and a second resonant inductor L2;

[0069] The first secondary half-bridge, the second secondary half-bridge and the DC filter capacitor C2 are connected in parallel, and the midpoint between the first secondary half-bridge and the second secondary half-bridge is connected to a series circuit consisting of a second resonant capacitor C4, a second resonant inductor L2 and a secondary winding of the transformer 2022;

[0070] The DC filter capacitor C2 is connected in parallel with the power battery 30 .

[0071] As shown in FIG3 , the first secondary half-bridge may be formed by a ninth power device Q9 and a tenth power device Q10, and the second secondary half-bridge may be formed by an eleventh power device Q11 and a twelfth power device Q12. One end of the second resonant capacitor C4 may be connected to the midpoint of the second secondary half-bridge, the other end of the second resonant capacitor C4 may be connected to the first end of the second resonant inductor L2 (the right end of the second resonant inductor L2 in the plane direction shown in FIG3 ), the second end of the second resonant inductor L2 (the left end of the second resonant inductor L2 in the plane direction shown in FIG3 ) may be connected to one end of the secondary winding of the transformer 2022, and the midpoint of the first secondary half-bridge may be connected to the other end of the secondary winding of the transformer 2022.

[0072] Optionally, each remaining compressor winding corresponds to a phase secondary half-bridge, and the second end of each remaining compressor winding is connected to the midpoint of the corresponding phase secondary half-bridge to reuse the secondary half-bridge as the compressor half-bridge corresponding to the remaining compressor winding.

[0073] The sum of the number of secondary half bridges and the second number is greater than or equal to the first number.

[0074] For example, the second secondary half-bridge in Figure 3 can be reused as the compressor half-bridge corresponding to the remaining compressor winding (C-phase winding), connecting the second end of the C-phase winding to the midpoint of the second secondary half-bridge. If the number of remaining compressor windings is two, two secondary half-bridges can be reused as the compressor half-bridges corresponding to the two remaining compressor windings, respectively, connecting the second end of each remaining compressor winding to the midpoint of the corresponding secondary half-bridge of one phase.

[0075] Figure 4 is a schematic diagram of the current flow from a power battery to a compressor module, according to an exemplary embodiment of the present disclosure. The arrows in Figure 4 indicate the direction of current flow. Direct current flows from the positive electrode of the power battery 30, passes through the first power device Q1 and the third power device Q3, where it is converted into alternating current to power the compressor windings. The current then flows back to the negative electrode of the power battery 30 through the twelfth power device Q12.

[0076] Optionally, the PFC circuit 201 may include:

[0077] One-phase power frequency half-bridge;

[0078] At least one phase correction half bridge, the at least one phase correction half bridge being connected in parallel with the power frequency half bridge and the bus capacitor C1 of the primary circuit 2021 of the DCDC converter 202;

[0079] At least one correction winding, the correction winding and the correction half bridge correspond one to one, the first end of each correction winding is connected to the middle point of the corresponding correction half bridge, the second end of the correction winding is connected to one end of the AC power supply 10 after being connected in common, and the other end of the AC power supply 10 is connected to the middle point of the power frequency half bridge.

[0080] As shown in FIG5 , the PFC circuit 201 includes a two-phase correction half-bridge. The first correction half-bridge may be composed of a thirteenth power device Q13 and a fourteenth power device Q14, the second correction half-bridge may be composed of a fifteenth power device Q15 and a sixteenth power device Q16, and the power frequency half-bridge may be composed of a seventeenth power device Q17 and an eighteenth power device Q18.

[0081] The correction winding may include an E-phase correction winding and an F-phase correction winding, each of which has a respective first end and a second end (in the plane direction shown in FIG5 , the first end is the right end and the second end is the left end). The second ends of the E-phase correction winding and the F-phase correction winding are connected in common to connect to one end of the AC power supply 10. In addition, the first ends of the E-phase correction winding and the F-phase correction winding are respectively connected to the midpoint of the corresponding correction half-bridge. After the correction half-bridge is connected in parallel with the power frequency half-bridge, the corresponding first end and second end are generated. The first end of the correction half-bridge after being connected in parallel with the power frequency half-bridge is the upper right end of the correction half-bridge after being connected in parallel with the power frequency half-bridge in the plane direction shown in FIG5 , and the second end of the correction half-bridge after being connected in parallel with the power frequency half-bridge is the lower right end of the correction half-bridge after being connected in parallel with the power frequency half-bridge in the plane direction shown in FIG5 . After the correction half-bridge is connected in parallel with the power frequency half-bridge, the corresponding first end and second end are connected to the two ends of the bus capacitor C1.

[0082] The direction of the arrow in Figure 5 is the direction of current. The AC power output by the AC power supply 10 can be rectified by the PFC circuit 201 inside the on-board charger 20, converting the AC power into DC power, and then boosted by the DCDC converter 202. The output high-voltage DC power is used to charge the power battery 30.

[0083] As shown in Figure 5, taking the upper end of the AC power supply 10 as the positive pole as an example, on the primary winding side of the transformer 2022, current flows through the E-phase winding and the F-phase winding into the thirteenth power device Q13 and the fifteenth power device Q15, respectively. The current then flows sequentially through the fifth power device Q5, the first resonant capacitor C3, the first resonant inductor L1, the primary winding of the transformer 2022, the eighth power device Q8, and the eighteenth power device Q18, before returning to the lower end (negative pole) of the AC power supply 10. On the secondary winding side of the transformer 2022, current flows out of the secondary winding of the transformer 2022, passes through the ninth power device Q9, and enters the positive pole of the power battery 30. The current then flows out of the negative pole of the power battery 30, passes through the twelfth power device Q12, the second resonant capacitor C4, and the second resonant inductor L2, and returns to the secondary winding of the transformer 2022.

[0084] The direction of the arrow in Figure 6 is the direction of current. The DC power output by the power battery 30 can be stepped down by the DCDC converter 202 inside the on-board charger 20, and inverted by the PFC circuit 201 to convert the DC power into AC power. The output AC power is used to charge the AC power supply 10.

[0085] As shown in Figure 6, on the secondary winding side of transformer 2022, current flows from the positive electrode of power battery 30, flows sequentially through the ninth power device Q9, the secondary winding of transformer 2022, the second resonant inductor L2, the second resonant capacitor C4, and the twelfth power device Q12, and then flows back to the negative electrode of power battery 30. On the primary winding side of transformer 2022, current flows from the primary winding of transformer 2022, flows through the first resonant inductor L1, the first resonant capacitor C3, the fifth power device Q5, then flows through the fifteenth power device Q15 and the F-phase winding, and through the thirteenth power device Q13 and the E-phase winding, into one end of the AC power source 10. The current then flows out of the other end of the AC power source 10, flows sequentially through the eighteenth power device Q18 and the eighth power device Q8, and then flows back to the primary winding of transformer 2022.

[0086] Optionally, the vehicle high-voltage circuit 1 may further include a heating module 50 , which is connected to the compressor module 40 and the controller.

[0087] For example, the controller may control the heating module 50 to start working when the ambient temperature is lower than a temperature threshold, so as to ensure the normal operation of the vehicle high-voltage system.

[0088] As shown in FIG7 , the heating module 50 may include a first heating power device Q19 , a second heating power device Q20 , a first resistor R1 and a second resistor R2 .

[0089] The first heating power device Q19 and the first resistor R1 are connected in series to form a first heating branch, and the second heating power device Q20 and the second resistor R2 are connected in series to form a second heating branch;

[0090] The first heating branch, the second heating branch and the compressor half bridge are connected in parallel.

[0091] Among them, the controller can control the first heating power device Q19 and the second heating power device Q20 to be turned on when the ambient temperature is lower than the temperature threshold, so as to convert electrical energy into thermal energy through the first resistor R1 and the second resistor R2, thereby ensuring the normal operation of the vehicle high-voltage circuit 1.

[0092] Optionally, the power devices referred to in this disclosure may be any one of MOS transistors (MOSFETs, insulated gate field effect transistors), IGBTs (insulated gate bipolar transistors), and triodes. To protect the power devices from damage due to reverse voltage, each power device may be connected in parallel with a parasitic diode.

[0093] The present disclosure further provides a vehicle 2, comprising the vehicle high-voltage circuit 1 according to any of the above embodiments. A schematic diagram of the vehicle 2 may be shown in FIG8 .

[0094] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0095] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0096] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle high voltage circuit (1), characterized in that: The vehicle high-voltage circuit (1) comprises an AC power source (10), an on-board charger (20), a power battery (30) and a compressor module (40): The AC power source (10), the on-board charger (20) and the power battery (30) are connected in sequence; The compressor module (40) comprises a first number of compressor windings and a second number of compressor half-bridges, wherein the first number is greater than the second number, and the compressor windings comprise the second number of target compressor windings and a third number of remaining compressor windings; The first bus terminal of the compressor half-bridges connected in parallel is connected to the positive electrode of the power battery (30), the first ends of the compressor windings are connected in common, the compressor half-bridges correspond to the target compressor windings one by one, the midpoint of each compressor half-bridge is connected to the second end of the corresponding target compressor winding, and the second ends of the remaining compressor windings are connected to the on-board charger (20) so as to reuse the half-bridges in the on-board charger (20) as the compressor half-bridges corresponding to the remaining compressor windings.

2. The vehicle high voltage circuit (1) according to claim 1, characterized in that: The vehicle high voltage circuit (1) further comprises a controller, The controller is connected to the compressor module (40) and the on-board charger (20) and is used to control the compressor half-bridge and the on-board charger (20) so as to charge and discharge the AC power source (10) and the power battery (30).

3. The vehicle high voltage circuit (1) according to claim 1 or 2, characterized in that: The vehicle-mounted charger (20) comprises: A PFC circuit (201), the PFC circuit (201) being connected to the AC power source (10) and used to achieve conversion between AC power and DC power; A DCDC converter (202) is connected to the output end of the PFC circuit (201), the compressor module (40) and the power battery (30) and is used to achieve direct current voltage conversion.

4. The vehicle high voltage circuit (1) according to claim 3, characterized in that: The DCDC converter (202) comprises a primary circuit (2021), a transformer (2022) and a secondary circuit (2023); The primary circuit (2021) is connected to the PFC circuit (201) and the transformer (2022); The secondary circuit (2023) is connected to the transformer (2022) and the power battery (30).

5. The vehicle high voltage circuit (1) according to claim 4, characterized in that: The primary circuit (2021) comprises a bus capacitor (C1), a first primary half bridge, a second primary half bridge, a first resonant capacitor (C3), and a first resonant inductor (L1); The bus capacitor (C1), the first primary half-bridge and the second primary half-bridge are connected in parallel, and the middle point of the first primary half-bridge and the second primary half-bridge is connected to a series circuit of a first resonant capacitor (C3), a first resonant inductor (L1) and a primary winding of the transformer (2022).

6. The vehicle high voltage circuit (1) according to claim 4, characterized in that: The secondary circuit (2023) comprises a DC filter capacitor (C2), a first secondary half bridge, a second secondary half bridge, a second resonant capacitor (C4), and a second resonant inductor (L2); The first secondary half bridge, the second secondary half bridge and the DC filter capacitor (C2) are connected in parallel, and a midpoint between the first secondary half bridge and the second secondary half bridge is connected to a series circuit of a second resonant capacitor (C4), a second resonant inductor (L2) and a secondary winding of the transformer (2022); The DC filter capacitor (C2) is connected in parallel with the power battery (30).

7. The vehicle high voltage circuit (1) according to claim 6, characterized in that: Each of the remaining compressor windings corresponds to a phase of the secondary half-bridge, and the second end of each of the remaining compressor windings is connected to the midpoint of the corresponding phase of the secondary half-bridge to reuse the secondary half-bridge as the compressor half-bridge corresponding to the remaining compressor windings, wherein the sum of the number of the secondary half-bridges and the second number is greater than or equal to the first number.

8. The vehicle high voltage circuit (1) according to claim 3, characterized in that: The PFC circuit (201) comprises: One-phase power frequency half bridge; At least one phase correction half bridge, the at least one phase correction half bridge being connected in parallel with the power frequency half bridge and the bus capacitor (C1) of the primary circuit (221) of the DCDC converter (202); At least one correction winding, the correction winding and the correction half bridge corresponding to each other, the first end of each correction winding is respectively connected to the middle point of the corresponding correction half bridge, the second ends of the correction windings are connected together and then connected to one end of the AC power supply (10), and the other end of the AC power supply (10) is connected to the middle point of the power frequency half bridge.

9. The vehicle high voltage circuit (1) according to any one of claims 2 to 8, characterized in that: The vehicle high-voltage circuit (1) further includes a heating module (50), The heating module (50) is connected to the compressor module (40) and the controller.

10. The vehicle high voltage circuit (1) according to claim 9, characterized in that: The heating module (50) comprises a first heating power device (Q19), a second heating power device (Q20), a first resistor (R1) and a second resistor (R2), The first heating power device (Q19) and the first resistor (R1) are connected in series to form a first heating branch, and the second heating power device (Q20) and the second resistor (R2) are connected in series to form a second heating branch; The first heating branch, the second heating branch and the compressor half bridge are connected in parallel.

11. A vehicle (2), characterized in that: The vehicle comprises the vehicle high-voltage circuit (1) as claimed in any one of claims 1 to 10.

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