A power supply circuit, a power supply system, and a vehicle

Abstract

The embodiment of the present application provides a power supply circuit, a power supply system and a vehicle. The power supply circuit comprises: the converter module comprises a transformer, and a primary side conversion circuit and a secondary side conversion circuit connected to two sides of the transformer respectively, the secondary side conversion circuit is used for being connected with a high-voltage bus; and a compressor, the compressor is connected with the primary side conversion circuit; wherein the transformer is used for isolating the compressor and the high-voltage bus. The power supply circuit provided by the embodiment of the present application can isolate the compressor and the high-voltage bus through the transformer, and the safety factor of the vehicle is improved.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, specifically relating to a power supply circuit, a power supply system, and a vehicle. Background Technology

[0002] Electric vehicles include a power battery and an air conditioning system, which is used to adjust the temperature of the electric vehicle.

[0003] In related technologies, the compressor module in an air conditioning system is typically connected to a high-voltage bus, and the power battery supplies power to the compressor module through the high-voltage bus. However, when the compressor module malfunctions, this malfunction may cause safety issues such as voltage leakage and short circuits in other critical components connected to the high-voltage bus, reducing the vehicle's safety factor. Summary of the Invention

[0004] This application aims to provide a power supply circuit, power supply system, and vehicle to solve the problem that existing compressors are directly connected to high-voltage busbars, which reduces the vehicle's safety factor.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a power supply circuit, comprising:

[0007] A converter module, comprising a transformer, and a primary-side conversion circuit and a secondary-side conversion circuit respectively connected to both sides of the transformer, wherein the secondary-side conversion circuit is used to connect to a high-voltage bus.

[0008] and a compressor module, which is connected to one side of the primary-side conversion circuit;

[0009] The transformer is used to isolate the compressor module from the high-voltage bus.

[0010] Optionally, the compressor module is connected in parallel with the primary-side conversion circuit.

[0011] Optionally, the compressor module includes a drive unit and a control bridge arm connected to the drive unit; the drive unit is used to drive the compressor to work.

[0012] The primary-side conversion circuit includes multiple bridge arms connected in parallel, and at least one of the bridge arms is multiplexed as the control bridge arm of the drive element.

[0013] Optionally, the control arm includes a first arm, and the primary-side conversion circuit includes a second arm and a third arm;

[0014] The first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel.

[0015] The midpoints of the first bridge arm, the second bridge arm, and the third bridge arm are respectively connected to the drive unit, and the midpoints of the second bridge arm and the third bridge arm are also connected to the transformer.

[0016] Optionally, the first bridge arm includes a first switch and a second switch connected in series, the second bridge arm includes a third switch and a fourth switch connected in series, and the third bridge arm includes a fifth switch and a sixth switch connected in series.

[0017] Optionally, the primary-side conversion circuit further includes a first capacitor and a first inductor, one end of the first capacitor being connected to the midpoint of the second bridge arm, the other end of the first capacitor being connected to one end of the first inductor, and the other end of the first inductor being connected to one end of the transformer.

[0018] Optionally, the power supply circuit further includes a power factor correction circuit, which is connected to the first bridge arm, the second bridge arm, and the third bridge arm; the power factor correction circuit is used to connect to an external AC power source.

[0019] Optionally, the power supply circuit further includes a controller, which is connected to the control terminal of the power factor correction circuit, the control terminal of the first bridge arm, the control terminal of the second bridge arm, the control terminal of the third bridge arm, and the control terminal of the secondary-side conversion circuit; the high-voltage bus is used to connect to the power battery.

[0020] The controller is configured to:

[0021] When the power demand of the drive unit is greater than the output power of the external AC power supply, the controller activates the power factor correction circuit, the first bridge arm, the second bridge arm, the third bridge arm, and the secondary-side conversion circuit to supply power to the drive unit through the external AC power supply and the power battery;

[0022] When the power demand of the drive unit is less than the output power of the external AC power supply, the controller activates the power factor correction circuit, the first bridge arm, the second bridge arm, the third bridge arm, and the secondary-side conversion circuit to supply power to the drive unit and the power battery through the external AC power supply.

[0023] When the output power of the external AC power supply is 0, the controller activates the first bridge arm, the second bridge arm, the third bridge arm, and the secondary conversion circuit to supply power to the drive unit through the power battery.

[0024] Optionally, the power factor correction circuit includes a fourth bridge arm, a fifth bridge arm, and a sixth bridge arm connected in parallel;

[0025] The midpoints of the fourth, fifth, and sixth bridge arms are respectively connected to the external AC power supply, and the fourth, fifth, and sixth bridge arms are connected in parallel with the first, second, and third bridge arms.

[0026] Optionally, the fourth bridge arm includes a seventh switch and an eighth switch connected in series;

[0027] The fifth bridge arm includes a ninth switch and a tenth switch connected in series;

[0028] The sixth bridge arm includes an eleventh switch and a twelfth switch connected in series.

[0029] Optionally, it also includes a second capacitor, which is connected in parallel with the fourth bridge arm, the fifth bridge arm, and the sixth bridge arm.

[0030] Optionally, it also includes a second inductor and a third inductor, one end of the second inductor being connected to the midpoint of the fourth bridge arm, and the other end of the second inductor being connected to the external AC power supply;

[0031] One end of the third inductor is connected to the midpoint of the fifth bridge arm, and the other end of the second inductor is connected to the external AC power supply.

[0032] Optionally, the power supply circuit further includes a heater connected to the input of the power factor correction circuit.

[0033] Optionally, the power supply circuit further includes a controller, which is connected to the control terminal of the power factor correction circuit, the control terminal of the primary-side conversion circuit, and the control terminal of the secondary-side conversion circuit; the high-voltage bus is used to connect to the power battery.

[0034] The controller is also configured to:

[0035] When the power demand of the heater is greater than the output power of the external AC power supply, the controller, the primary-side conversion circuit, and the secondary-side conversion circuit are activated to supply power to the heater through the external AC power supply and the power battery.

[0036] When the power demand of the heater is less than the output power of the external AC power supply, the controller activates the power factor correction circuit, the primary-side conversion circuit, and the secondary-side conversion circuit to supply power to the heater and the power battery through the external AC power supply.

[0037] When the output power of the external AC power supply is 0, the controller activates the primary-side conversion circuit and the secondary-side conversion circuit to supply power to the heater through the power battery.

[0038] Optionally, the secondary-side conversion circuit includes a sixth bridge arm and a seventh bridge arm connected in parallel, the midpoint of the sixth bridge arm and the seventh bridge arm being connected to the transformer, and the output terminals of the sixth bridge arm and the seventh bridge arm being connected to the power battery.

[0039] Optionally, the secondary-side conversion circuit includes a seventh bridge arm and an eighth bridge arm connected in parallel, the midpoint of the seventh bridge arm and the eighth bridge arm being connected to the transformer, and the seventh bridge arm and the eighth bridge arm also being connected to the high-voltage bus.

[0040] Optionally, it also includes a third capacitor, which is connected in parallel with the seventh bridge arm and the eighth bridge arm.

[0041] Optionally, the seventh bridge arm includes a thirteenth and a fourteenth switch connected in series; the eighth bridge arm includes a fifth and a sixteenth switch connected in series.

[0042] Optionally, it also includes a fourth capacitor and a fourth inductor, one end of the fourth capacitor being connected to the midpoint of the eighth bridge arm, the other end of the fourth capacitor being connected to one end of the fourth inductor, and the other end of the fourth inductor being connected to the transformer.

[0043] Optionally, the transformer includes: a primary winding and a secondary winding coupled to each other;

[0044] The primary-side coil is connected to the primary-side conversion circuit, and the secondary-side coil is connected to the secondary-side conversion circuit.

[0045] Secondly, this application also discloses a power supply system, including the power supply circuit, power battery and high-voltage bus described in any of the above claims;

[0046] The power supply circuit is connected to the high-voltage bus, and the high-voltage bus is connected to the power battery.

[0047] Thirdly, this application also discloses a vehicle, which includes the aforementioned power supply system.

[0048] In this embodiment, by connecting the compressor module to one side of the primary-side conversion circuit, a transformer is provided between the compressor module and the high-voltage bus. This transformer can isolate the compressor module from the high-voltage bus, preventing faults generated by the compressor module from being transmitted to other critical components connected to the high-voltage bus. This reduces the occurrence of safety issues such as voltage leakage and short circuits in other critical components, thereby improving the vehicle's safety factor.

[0049] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0050] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0051] Figure 1 This is a structural block diagram of a power supply circuit provided in an embodiment of this application;

[0052] Figure 2 This is a circuit diagram of a power supply circuit provided in an embodiment of this application;

[0053] Figure 3 This is a schematic diagram of the first control strategy provided in the embodiments of this application;

[0054] Figure 4 This is a schematic diagram of the second control strategy provided in the embodiments of this application;

[0055] Figure 5 This is a schematic diagram of the third control strategy provided in the embodiments of this application.

[0056] Figure reference numerals: 1 - Power supply circuit; 10 - Power factor correction circuit; Q7 - Seventh switch; Q8 - Eighth switch; Q9 - Ninth switch; Q10 - Tenth switch; Q11 - Eleventh switch; Q12 - Twelfth switch; C2 - Second capacitor; L2 - Second inductor; L3 - Third inductor; 20 - Converter module; 201 - Transformer; 2011 - Primary coil; 2012 - Secondary coil; 202 - Primary conversion circuit; Q3 - Third switch; Q4 - Fourth switch; Q5 - Fifth switch; Q6 - Sixth switch Switch; C1 - First capacitor; L1 - First inductor; 203 - Secondary switching circuit; Q13 - Thirteenth switching transistor; Q14 - Fourteenth switching transistor; Q15 - Fifteenth switching transistor; Q16 - Sixteenth switching transistor; C3 - Third capacitor; C4 - Fourth capacitor; L4 - Fourth inductor; 30 - Compressor module; 301 - Driver; Q1 - First switching transistor; Q2 - Second switching transistor; C2 - Third capacitor; C3 - Fourth capacitor; L3 - Third inductor; L4 - Fourth inductor; 40 - Heater; 2 - External AC power supply; 3 - Power battery. Detailed Implementation

[0057] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0058] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] In this application, the term "midpoint" is not limited to the center position of the bridge arm, but can be extended to mean the position between the two switching transistors of each bridge arm.

[0061] This application provides a power supply circuit 1, which will be described in detail below with reference to the accompanying drawings.

[0062] Reference Figures 1-2 The power supply circuit 1 provided in this application embodiment may specifically include: a converter module 20, the converter module 20 including a transformer 201, and a primary-side conversion circuit 202 and a secondary-side conversion circuit 203 respectively connected to both sides of the transformer 201, the secondary-side conversion circuit 203 being used to connect to the high-voltage bus; and a compressor module 30, the compressor module 30 being connected to the primary-side conversion circuit 202; wherein, the transformer 201 is used to isolate the compressor module 30 and the high-voltage bus.

[0063] Specifically, the converter module 20 includes a transformer 201 and a primary-side conversion circuit 202 and a secondary-side conversion circuit 203 connected to both sides of the transformer 201. The primary-side conversion circuit 202 is used to connect to an external AC power supply or other circuits, and the secondary-side conversion circuit 203 is used to connect to the high-voltage bus in the vehicle. The high-voltage bus is used to connect to the power battery 3. The compressor module 30 is connected to one side of the primary-side conversion circuit 202. The compressor module 30 specifically refers to the compressor module 30 in the vehicle's air conditioning system, which can drive the compressor to work. In this way, the transformer 201 is located between the compressor module 30 and the high-voltage bus, which can isolate the high-voltage bus and the compressor module 30.

[0064] In this embodiment, by connecting the compressor module 30 to one side of the primary-side conversion circuit 202, a transformer 201 is provided between the compressor module 30 and the high-voltage bus. In this way, the transformer 201 can electrically isolate the compressor module 30 from the high-voltage bus, preventing faults generated by the compressor module 30 from being transmitted to other critical components connected to the high-voltage bus through the high-voltage bus. This reduces the occurrence of safety problems such as voltage leakage and short circuits on other critical components, thereby improving the safety factor of the vehicle.

[0065] In some alternative embodiments, the compressor module 30 is connected in parallel with the primary-side conversion circuit 202. For example... Figure 2 As shown, the compressor module 30 is connected in parallel with the primary-side conversion circuit 202. The transformer 201 is located between the compressor module 30, which is connected in parallel with the primary-side conversion circuit 202, and the high-voltage bus. The electrical isolation function of the transformer 201 remains unchanged, which ensures that any electrical fault generated by the compressor module 30 will not be transmitted to other critical components through the high-voltage bus, thereby maintaining the original electrical safety characteristics.

[0066] Optionally, the compressor module 30 includes a drive unit 301 and a control bridge arm connected to the drive unit 301. The drive unit 301 is used to drive the compressor to work. The primary-side conversion circuit 202 includes multiple bridge arms connected in parallel, and at least one bridge arm is multiplexed as the control bridge arm of the drive unit 301.

[0067] Specifically, the drive unit 301 is a motor, and the control arm is connected to the drive unit 301. The control arm controls the opening and closing of the drive unit 301, thereby controlling the opening and closing of the compressor. The primary-side conversion circuit 202 includes multiple arms connected in parallel, which convert direct current (DC) to alternating current (AC) or vice versa. The control arm of the drive unit 301 is connected in parallel with the multiple arms of the primary-side conversion circuit 202, and the drive unit 301 can reuse at least one arm of the primary-side conversion circuit 202 as its control arm. In this embodiment, by reusing at least one arm of the primary-side conversion circuit 202 as its control arm, the drive unit 301 can reduce the number of components in the vehicle, lower costs, and improve the vehicle's integration level.

[0068] Optionally, the control arm includes: a first arm; the primary-side conversion circuit 202 includes a second arm and a third arm; the first arm, the second arm and the third arm are connected in parallel; the midpoints of the first arm, the second arm and the third arm are respectively connected to the drive unit 301; and the midpoints of the second arm and the third arm are also connected to the transformer 201.

[0069] Specifically, the drive unit 301 is an AC motor, and its specific structure can be referred to in the prior art; this application embodiment does not specifically limit it. The AC terminals of the drive unit 301 are respectively connected to the midpoints of the first bridge arm of the drive unit 301 and the second and third bridge arms in the primary-side conversion circuit 202. By controlling the first, second, and third bridge arms, DC power can be converted into three-phase AC power to supply power to the drive unit 301. In this embodiment, by reusing the second and third bridge arms in the primary-side conversion circuit 202, the number of components in the vehicle can be reduced, costs can be lowered, and the integration level of the vehicle can be improved.

[0070] Furthermore, the first bridge arm includes a first switch Q1 and a second switch Q2 connected in series; the second bridge arm includes a third switch Q3 and a fourth switch Q4 connected in series; and the third bridge arm includes a fifth switch Q5 and a sixth switch Q6 connected in series. The AC terminals of the drive unit 301 are respectively connected between the first switch Q1 and the second switch Q2, between the third switch Q3 and the fourth switch Q4, and between the fifth switch Q5 and the sixth switch Q6. By controlling the first switch Q1, the second switch Q2, the third switch Q3, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6, DC power can be converted into AC power and supplied to the drive unit 301 or the transformer 201.

[0071] Furthermore, the primary-side conversion circuit 202 also includes a first capacitor C1 and a first inductor L1. One end of the first capacitor C1 is connected to the midpoint of the second bridge arm, and the other end of the first capacitor C1 is connected to one end of the first inductor L1. The other end of the first inductor L1 is connected to one end of the transformer 201.

[0072] Optionally, the power supply circuit 1 further includes a power factor correction circuit 10, which is connected to the first bridge arm, the second bridge arm, and the third bridge arm; the power factor correction circuit 10 is used to connect to an external AC power supply 2.

[0073] Specifically, the input terminal of the power factor correction circuit 10 is used to connect to an external AC power source 2. The external AC power source 2 can be an AC charging pile, power grid, AC charging station, etc. The power factor correction circuit 10 is used to process the AC power provided by the external AC power source into DC power and provide it to the first bridge arm, the second bridge arm, and the third bridge arm. By controlling the first bridge arm, the second bridge arm, and the third bridge arm, the DC power can be converted into AC power and provided to the drive unit 301 or the transformer 201.

[0074] In some optional embodiments, the power supply circuit 1 further includes a controller, which is connected to the control terminal of the power factor correction circuit 10, the control terminal of the first bridge arm, the control terminal of the second bridge arm, the control terminal of the third bridge arm, and the control terminal of the secondary-side conversion circuit 203, respectively; the high-voltage bus is used to connect to the power battery 3; the controller is configured to: when the power demand of the drive unit 301 is greater than the output power of the external AC power supply 2, the controller activates the power factor correction circuit 10, the first bridge arm, the second bridge arm, the third bridge arm, and the secondary-side conversion circuit 203 to supply power to the external AC power supply 2. The power battery 3 supplies power to the drive unit 301. When the power demand of the drive unit 301 is less than the output power of the external AC power supply 2, the controller activates the power factor correction circuit 10, the first bridge arm, the second bridge arm, the third bridge arm and the secondary-side conversion circuit 203 to supply power to the drive unit 301 through the external AC power supply 2 and to charge the power battery 3 through the external AC power supply 2. When the output power of the external AC power supply 2 is 0, the controller activates the first bridge arm, the second bridge arm, the third bridge arm and the secondary-side conversion circuit 203 to supply power to the drive unit 301 through the power battery 3.

[0075] Reference Figure 3 The diagram illustrates a first control strategy in an embodiment of this application. Figure 3 As shown, the controller is configured such that when the power demand of the drive unit 301 exceeds the output power of the external AC power supply 2, the controller activates the power factor correction circuit 10 to convert the AC power supplied by the external AC power supply 2 into DC power. The first, second, and third bridge arms then convert this DC power into three-phase AC power, which is supplied to the drive unit 301. Simultaneously, the controller activates the secondary-side conversion circuit 203, which, through the secondary-side conversion circuit 203, the first, second, and third bridge arms, and the transformer 201, inverts the DC power from the power battery 3 into the three-phase AC power required by the drive unit 301. In other words, the compressor is charged simultaneously through the external AC power supply 2 and the power supply circuit 1.

[0076] Reference Figure 4 The diagram illustrates a second control strategy in an embodiment of this application. Figure 4 As shown, the controller is configured such that when the power demand of the drive unit 301 is less than the output power of the external AC power supply 2, the controller activates the power factor correction circuit 10 to convert the AC power supplied by the external AC power supply 2 into DC power. The first, second, and third bridge arms then convert this DC power into three-phase AC power, a portion of which is supplied to the drive unit 301. Simultaneously, the controller also activates the secondary-side conversion circuit 203, which transforms another portion of the AC power through the transformer 201, and then converts the remaining three-phase AC power back into DC power through the secondary-side conversion circuit 203 to power the power battery 3. In other words, the external AC power supply 2 powers both the drive unit 301 and the power battery 3.

[0077] Reference Figure 5 The diagram illustrates a third control strategy in an embodiment of this application, such as... Figure 5 As shown, when the controller is configured such that the output power of the external AC power supply 2 is 0, that is, when the power factor correction circuit 10 is not connected to the external AC power supply 2, the controller starts the secondary conversion circuit 203. Through the secondary conversion circuit 203, the first bridge arm, the second bridge arm, the third bridge arm, and the transformer 201, the DC power of the power battery 3 is inverted into the three-phase AC power required by the drive unit 301, that is, the drive unit 301 is powered by the power battery 3.

[0078] In this embodiment, when the power demand of the drive unit 301 is greater than the output power of the external AC power supply 2, the compressor is powered simultaneously by the external AC power supply 2 and the power supply circuit 1. When the power demand of the drive unit 301 is less than the output power of the external AC power supply 2, the power battery 3 is charged while the drive unit 301 is powered by the external AC power supply 2, which maximizes the utilization of the output power of the external AC power supply 2 and improves the energy utilization rate of the external AC power supply 2.

[0079] In one embodiment of this application, the power factor correction circuit 10 includes a fourth bridge arm, a fifth bridge arm, and a sixth bridge arm connected in parallel; the midpoints of the fourth bridge arm, the fifth bridge arm, and the sixth bridge arm are respectively connected to an external AC power supply 2, and the fourth bridge arm, the fifth bridge arm, and the sixth bridge arm are connected in parallel to the first bridge arm, the second bridge arm, and the third bridge arm.

[0080] Specifically, the AC terminals of the external AC power supply 2 are connected to the midpoints of the fourth, fifth, and sixth bridge arms, respectively. The AC power from the external AC power supply 2 can be processed by controlling the fourth, fifth, and sixth bridge arms.

[0081] Furthermore, the fourth bridge arm includes a seventh switch Q7 and an eighth switch Q8 connected in series; the fifth bridge arm includes a ninth switch Q9 and a tenth switch Q10 connected in series; and the sixth bridge arm includes an eleventh switch Q11 and a twelfth switch Q12 connected in series. The AC terminals of the external AC power supply 2 are connected between the seventh switch Q7 and the eighth switch Q8, between the ninth switch Q9 and the tenth switch Q10, and between the eleventh switch Q11 and the twelfth switch Q12, respectively. By controlling the switching on and off of the seventh switch Q7 and the eighth switch Q8, the ninth switch Q9 and the tenth switch Q10, and the seventh switch Q7 and the eighth switch Q8, the AC power from the external AC power supply 2 is processed.

[0082] In some embodiments, the power factor correction circuit 10 further includes a second capacitor C2, which is connected in parallel with the fourth bridge arm, the fifth bridge arm, and the sixth bridge arm.

[0083] In some optional embodiments, the power factor correction circuit 10 further includes a second inductor L2 and a third inductor L3. One end of the second inductor L2 is connected to the midpoint of the fourth bridge arm, and the other end of the second inductor L2 is connected to an AC terminal of the external AC power supply 2. One end of the third inductor L3 is connected to the midpoint of the fifth bridge arm, and the other end of the third inductor L3 is connected to an AC terminal of the external AC power supply 2.

[0084] Optionally, the power supply circuit 1 also includes a heater 40, which is connected to the input terminal of the power factor correction circuit 10. The heater 40 is an AC heater 40. When the input terminal of the power correction circuit is connected to an external AC power supply 2, the AC heater 40 can be powered by the external AC power supply 2, or the DC power from the power battery 3 can be converted to AC power by the converter module 20 to power the AC heater 40. In practical applications, by connecting the AC heater 40 to the input terminal of the power factor correction circuit 10, the AC heater 40 can reuse the converter module 20 in the power supply circuit 1, which can reduce the number of parts in the vehicle, reduce costs, improve the integration level of the vehicle, and increase the feasibility of reusing the retired heater 40 in the vehicle.

[0085] In some optional embodiments, the power supply circuit 1 further includes a controller, which is connected to the control terminal of the power factor correction circuit 10, the control terminal of the primary-side conversion circuit 202, and the control terminal of the secondary-side conversion circuit 203, respectively. A high-voltage bus is used to connect to the power battery 3. The controller is also configured to: when the power demand of the heater 40 is greater than the output power of the external AC power supply 2, activate the power factor correction circuit 10, the primary-side conversion circuit 202, and the secondary-side conversion circuit 203 to supply power to the heater 40 through the external AC power supply 2 and the power battery 3; when the power demand of the heater 40 is less than the output power of the external AC power supply 2, activate the power factor correction circuit 10, the primary-side conversion circuit 202, and the secondary-side conversion circuit 203 to supply power to the heater 40 through the external AC power supply 2 and to supply power to the power battery 3 through the external AC power supply 2; when the output power of the external AC power supply 2 is 0, activate the power factor correction circuit 10, the primary-side conversion circuit 202, and the secondary-side conversion circuit 203 to supply power to the heater 40 through the power battery 3.

[0086] Specifically, when the power demand of heater 40 exceeds the output power of external AC power supply 2, the AC power from external AC power supply 2 is supplied to heater 40. Simultaneously, the controller activates the primary-side conversion circuit 202 and the secondary-side conversion circuit 203 to invert the DC power from power battery 3 into AC power to supply heater 40. When the power demand of heater 40 is less than the output power of external AC power supply 2, a portion of the AC power from external AC power supply 2 is supplied to heater 40, while the remaining portion, after being processed by the power factor correction circuit 10, primary-side conversion circuit 202, and secondary-side conversion circuit 203 activated by the controller, is used to charge power battery 3. When power factor correction circuit 10 is not connected to external AC power supply 2, the controller activates the primary-side conversion circuit 202 and secondary-side conversion circuit 203 to invert the DC power from power battery 3 into AC power to supply heater 40.

[0087] In this embodiment, when the power demand of heater 40 is greater than the output power of external AC power supply 2, heater 40 is powered simultaneously by external AC power supply 2 and power supply circuit 1. When the power demand of heater 40 is less than the output power of external AC power supply 2, power supply 2 powers heater 40 while charging power battery 3, maximizing the utilization of output power of external AC power supply 2 and improving the energy utilization rate of external AC power supply 2.

[0088] In some embodiments, the secondary-side conversion circuit 203 includes a seventh bridge arm and an eighth bridge arm connected in parallel. The midpoints of the seventh bridge arm and the eighth bridge arm are respectively connected to the transformer 201, and the output terminals of the seventh bridge arm and the eighth bridge arm are connected to the high-voltage bus.

[0089] Specifically, the midpoint of the seventh and eighth bridge arms is connected to the transformer 201, and the output terminals of the seventh and eighth bridge arms are connected to the high-voltage bus. The AC power supplied to the transformer 201 can be converted to DC power by controlling the seventh and eighth bridge arms to supply the high-voltage bus, or the DC power supplied by the power battery 3 can be converted to AC power to supply the transformer 201.

[0090] Furthermore, the secondary-side switching circuit 203 also includes a third capacitor C3, which is connected in parallel with the seventh and eighth bridge arms.

[0091] Furthermore, the seventh bridge arm includes a thirteenth switch Q13 and a fourteenth switch Q14 connected in series, and the eighth bridge arm includes a fifteenth switch Q15 and a sixteenth switch Q16 connected in series. By controlling the on / off state of the thirteenth switch Q13, the fourteenth switch Q14, the fifteenth switch Q15, and the sixteenth switch Q16, the mutual conversion between direct current and alternating current can be realized.

[0092] In some alternative embodiments, the secondary-side switching circuit 203 further includes a fourth capacitor C4 and a fourth inductor L4, one end of the fourth capacitor C4 being connected to the midpoint of the eighth bridge arm, the other end of the fourth capacitor C4 being connected to one end of the fourth inductor L4, and the other end of the fourth inductor L4 being connected to the transformer 201.

[0093] Optionally, the transformer 201 includes a primary coil 2011 and a secondary coil 2012 coupled to each other; the primary coil 2011 is connected to the primary-side conversion circuit 202, and the secondary coil 2012 is connected to the secondary-side conversion circuit 203. Specifically, the primary coil 2011 and the secondary coil 2012 are electromagnetically coupled to each other; the first end of the primary coil 2011 is connected to the other end of the first inductor L1 of the primary-side conversion circuit 202, the second end of the primary coil 2011 is connected to the midpoint of the second bridge arm of the primary-side conversion circuit 202, the first end of the secondary coil 2012 is connected to the midpoint of the seventh bridge arm of the secondary-side conversion circuit 203, and the second end of the secondary coil 2012 is connected to the other end of the fourth inductor L4 of the secondary-side conversion circuit 203.

[0094] It should be noted that the embodiments in this application only illustrate the integration scheme of the compressor module 30, the heater 40 and the primary-side conversion circuit 202 of the power supply circuit 1. In actual applications, feasible components such as compressors and drive motors can be integrated with the vehicle charging circuit.

[0095] The switching transistors mentioned in the above embodiments can be MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), JFET (Junction Field-Effect Transistor), etc.

[0096] In summary, the power supply circuit of the embodiments of this application may include at least the following advantages:

[0097] In this embodiment, by connecting the compressor module 30 to the primary-side conversion circuit 202 in the converter module 20, the transformer 201 of the converter module 20 can electrically isolate the compressor module 30 from the power battery 3, preventing faults generated by the compressor module 30 from being directly transmitted to the power battery 3, thereby reducing the occurrence of safety problems such as voltage leakage and short circuits, and improving the safety factor of the vehicle.

[0098] This application also provides a power supply system, which may specifically include the power supply circuit 1, power battery 3 and high-voltage bus of any of the above embodiments.

[0099] The secondary conversion circuit 203 of power supply circuit 1 is connected to the high-voltage bus, the high-voltage bus is connected to the power battery 3, and the power factor correction circuit 10 of power supply circuit 2 is connected to the external AC power supply 2.

[0100] It should be noted that in this embodiment, the structure of the power supply circuit 1 is the same as that of the power supply circuit 1 in any of the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0101] This application also provides a vehicle, which may specifically include the power supply system described in the embodiments.

[0102] Specifically, the vehicle can be an electric vehicle, a hybrid electric vehicle, etc.

[0103] It should be noted that in this embodiment, the structure of the power supply system is the same as that in the above embodiments, and its beneficial effects are similar, so it will not be described in detail here.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0105] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A power supply circuit, characterized in that, include: The converter module (20) includes a transformer (201), and a primary-side conversion circuit (202) and a secondary-side conversion circuit (203) respectively connected to both sides of the transformer (201). The secondary-side conversion circuit (203) is used to connect to the high-voltage bus. and a compressor module (30), which is connected to one side of the primary-side conversion circuit (202); The transformer (201) is used to isolate the compressor module (30) from the high-voltage bus.

2. The power supply circuit according to claim 1, characterized in that, The compressor module (30) is connected in parallel with the primary-side conversion circuit (202).

3. The power supply circuit according to claim 1, characterized in that, The compressor module (30) includes a drive unit (301) and a control bridge arm connected to the drive unit (301); the drive unit (301) is used to drive the compressor to work; The primary-side conversion circuit (202) includes multiple bridge arms connected in parallel, at least one of the bridge arms being multiplexed as the control bridge arm of the drive (301).

4. The power supply circuit according to claim 3, characterized in that, The control arm includes a first arm, and the primary-side conversion circuit (202) includes a second arm and a third arm; The first bridge arm, the second bridge arm, and the third bridge arm are connected in parallel; The midpoints of the first bridge arm, the second bridge arm, and the third bridge arm are respectively connected to the drive unit (301), and the midpoints of the second bridge arm and the third bridge arm are also connected to the transformer (201).

5. The power supply circuit according to claim 4, characterized in that, The first bridge arm includes a first switch (Q1) and a second switch (Q2) connected in series, the second bridge arm includes a third switch (Q3) and a fourth switch (Q4) connected in series, and the third bridge arm includes a fifth switch (Q5) and a sixth switch (Q6) connected in series.

6. The power supply circuit according to claim 4, characterized in that, The primary-side conversion circuit (202) further includes a first capacitor (C1) and a first inductor (L1). One end of the first capacitor (C1) is connected to the midpoint of the second bridge arm, and the other end of the first capacitor (C1) is connected to one end of the first inductor (L1). The other end of the first inductor (L1) is connected to one end of the transformer (201).

7. The power supply circuit according to claim 4, characterized in that, The power supply circuit (1) further includes a power factor correction circuit (10), which is connected to the first bridge arm, the second bridge arm and the third bridge arm; the power factor correction circuit (10) is used to connect to an external AC power supply (2).

8. The power supply circuit according to claim 7, characterized in that, The power supply circuit (1) also includes a controller, which is connected to the control terminal of the power factor correction circuit (10), the control terminal of the first bridge arm, the control terminal of the second bridge arm, the control terminal of the third bridge arm, and the control terminal of the secondary-side conversion circuit (203); the high-voltage bus is used to connect to the power battery (3). The controller is configured to: When the power demand of the drive unit (301) is greater than the output power of the external AC power supply (2), the controller activates the power factor correction circuit (10), the first bridge arm, the second bridge arm, the third bridge arm and the secondary conversion circuit (203) to supply power to the drive unit (301) through the external AC power supply (2) and the power battery (3); When the power demand of the drive unit (301) is less than the output power of the external AC power supply (2), the controller activates the power factor correction circuit (10), the first bridge arm, the second bridge arm, the third bridge arm and the secondary conversion circuit (203) to supply power to the drive unit (301) through the external AC power supply (2) and to supply power to the power battery (3) through the external AC power supply (2); When the output power of the external AC power supply (2) is 0, the controller starts the first bridge arm, the second bridge arm, the third bridge arm and the secondary conversion circuit (203) to supply power to the drive unit (301) through the power battery (3).

9. The power supply circuit according to claim 7, characterized in that, The power factor correction circuit (10) includes a fourth bridge arm, a fifth bridge arm, and a sixth bridge arm connected in parallel; The midpoints of the fourth, fifth, and sixth bridge arms are respectively connected to the external AC power supply (2), and the fourth, fifth, and sixth bridge arms are connected in parallel with the first, second, and third bridge arms.

10. The power supply circuit according to claim 9, characterized in that, The fourth bridge arm includes a seventh switch (Q7) and an eighth switch (Q8) connected in series; the fifth bridge arm includes a ninth switch (Q9) and a tenth switch (Q10) connected in series; and the sixth bridge arm includes an eleventh switch (Q11) and a twelfth switch (Q12) connected in series.

11. The power supply circuit according to claim 9, characterized in that, It also includes a second capacitor (C2), which is connected in parallel with the fourth bridge arm, the fifth bridge arm and the sixth bridge arm.

12. The power supply circuit according to claim 9, characterized in that, It also includes a second inductor (L2) and a third inductor (L3), one end of the second inductor (L2) is connected to the midpoint of the fourth bridge arm, and the other end of the second inductor (L2) is connected to the external AC power supply (2); One end of the third inductor (L3) is connected to the midpoint of the fifth bridge arm, and the other end of the second inductor (L3) is connected to the external AC power supply (2).

13. The power supply circuit according to claim 7, characterized in that, The power supply circuit (1) also includes a heater (40), which is connected to the input terminal of the power factor correction circuit (10).

14. The power supply circuit according to claim 13, characterized in that, The power supply circuit (1) also includes a controller, which is connected to the control terminal of the power factor correction circuit (10), the control terminal of the primary-side conversion circuit (202), and the control terminal of the secondary-side conversion circuit (203); the high-voltage bus is used to connect to the power battery (3); The controller is also configured to: When the power demand of the heater (40) is greater than the output power of the external AC power supply (2), the controller activates the power factor correction circuit (10), the primary-side conversion circuit (202) and the secondary-side conversion circuit (203) to supply power to the heater (40) through the external AC power supply (2) and the power battery (3); When the power demand of the heater (40) is less than the output power of the external AC power supply (2), the controller activates the power factor correction circuit (10), the primary-side conversion circuit (202) and the secondary-side conversion circuit (203) to supply power to the heater (40) through the external AC power supply (2) and to supply power to the power battery (3) through the external AC power supply (2). When the output power of the external AC power supply (2) is 0, the controller activates the power factor correction circuit (10), the primary-side conversion circuit (202) and the secondary-side conversion circuit (203) to supply power to the heater (40) through the power battery (3).

15. The power supply circuit according to claim 1, characterized in that, The secondary-side conversion circuit (203) includes a seventh bridge arm and an eighth bridge arm connected in parallel. The midpoint of the seventh bridge arm and the eighth bridge arm is connected to the transformer (201). The seventh bridge arm and the eighth bridge arm are also connected to the high-voltage bus.

16. The power supply circuit according to claim 15, characterized in that, It also includes a third capacitor (C3), which is connected in parallel with the seventh bridge arm and the eighth bridge arm.

17. The power supply circuit according to claim 15, characterized in that, The seventh bridge arm includes a thirteenth switch (Q13) and a fourteenth switch (Q14) connected in series; the eighth bridge arm includes a fifth switch (Q15) and a sixteenth switch (Q16) connected in series.

18. The power supply circuit according to claim 15, characterized in that, It also includes a fourth capacitor (C4) and a fourth inductor (L4), one end of the fourth capacitor (C4) being connected to the midpoint of the eighth bridge arm, the other end of the fourth capacitor (C4) being connected to one end of the fourth inductor (L4), and the other end of the fourth inductor (L4) being connected to the transformer (210).

19. The power supply circuit according to any one of claims 1-18, characterized in that, The transformer (201) includes: a primary winding (2011) and a secondary winding (2012) that are coupled to each other; The primary coil (2011) is connected to the primary conversion circuit (202), and the secondary coil (2012) is connected to the secondary conversion circuit (203).

20. A power supply system, characterized in that, The power supply system includes the power supply circuit (1), power battery (3), and high-voltage bus as described in any one of claims 1-19; The power supply circuit (1) is connected to the high-voltage bus, and the high-voltage bus is connected to the power battery (3).

21. A vehicle, characterized in that, include: The power supply system as described in claim 20.

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