Power module for vehicle-mounted charger, vehicle-mounted charger and vehicle

Abstract

The invention discloses a power module for a vehicle-mounted charger, the vehicle-mounted charger and a vehicle, and belongs to the technical field of vehicle-mounted chargers. According to the power module of the vehicle-mounted charger, the vehicle-mounted charger comprises a power factor correction circuit, a resonant conversion circuit and a direct current conversion circuit, and the power module is integrated with a first power switch unit, a second power switch unit and a third power switch unit; wherein the first power switch unit is used for constructing a power factor correction circuit, the second power switch unit is used for constructing a resonant conversion circuit, and the third power switch unit is used for constructing a direct current conversion circuit. The power switches of all circuit parts in the vehicle-mounted charger are integrated together to form the power module, and other elements are connected with the power module to form all functional circuits, so that the space occupied by the independent part of each device is reduced, and the integration level is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of on-board chargers, and in particular relates to a power module for an on-board charger, an on-board charger and a vehicle. Background Art

[0002] At present, electric vehicles are developing rapidly, and the requirements for on-board chargers of new energy vehicles are getting higher and higher. Not only must basic functions such as charging and reverse discharge be realized, but also the power density must be further improved, the integration level must be improved, and the size of the equipment must be reduced. At present, the integration level of on-board chargers needs to be improved. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a power module for an on-board charger, an on-board charger and a vehicle, wherein the power switches of various circuit parts in the on-board charger are integrated together, thereby reducing the space occupied by the individual parts of each device, thereby improving the integration.

[0004] In a first aspect, the present application provides a power module for an on-board charger, the on-board charger comprising a power factor correction circuit, a resonant conversion circuit and a DC conversion circuit, the power module integrating a first power switch unit, a second power switch unit and a third power switch unit; Among them, the first power switch unit is used to construct a power factor correction circuit, the second power switch unit is used to construct a resonant conversion circuit, and the third power switch unit is used to construct a DC conversion circuit.

[0005] According to one embodiment of the present application, the first power switch unit, the second power switch unit and the third power switch unit are integrally packaged.

[0006] According to an embodiment of the present application, each switch chip in the first power switch unit, the second power switch unit and the third power switch unit is integrated into the same semiconductor structure.

[0007] According to an embodiment of the present application, a packaging shell of the power module is provided with a heat dissipation structure.

[0008] According to one embodiment of the present application, the heat dissipation structure includes a water cooling unit.

[0009] In a second aspect, the present application provides an on-board charger, which includes an electronic device unit and the aforementioned power module, wherein the electronic device unit is connected to the power module.

[0010] According to an embodiment of the present application, the electronic device unit includes a plurality of power components, and each power component is arranged around the power module.

[0011] According to one embodiment of the present application, at least one first line and at least one second line are provided between the power module and each power component, the power flows in the first line and the second line are different, and the first line and the second line are alternately arranged along the circumference of the power module.

[0012] According to one embodiment of the present application, the power component includes an input electromagnetic filtering component, a correction inductor component, a bus capacitor component, a transformer resonance component, a battery component, a transformer DC conversion component and an output electromagnetic filtering component.

[0013] According to one embodiment of the present application, the electronic device unit includes an inductor, a first transformer, a resonant unit and a second transformer. The inductor is connected to the first power switch unit in the power module to construct a power factor correction circuit. The first transformer and the resonant unit are connected to the second power switch unit in the power module to construct a resonant conversion circuit. The second transformer is connected to the third power switch unit in the power module to construct a DC conversion circuit.

[0014] According to one embodiment of the present application, the on-board charger further includes a control circuit and a drive circuit. The control circuit and the drive circuit are configured as a plurality of circuit boards. Each circuit board is connected to a power module for driving the power module.

[0015] According to an embodiment of the present application, the circuit boards are connected in a stacked manner.

[0016] According to one embodiment of the present application, the multiple circuit boards include a charger control board, a DC control board, an auxiliary power supply board, a drive power supply board, a drive board, a drive adapter board, a relay board, a sampling board, a capacitor board and an electromagnetic filter board that are interconnected.

[0017] According to one embodiment of the present application, a charger control board has a first side and a second side opposite to each other along a first direction, a DC control board is arranged on the first side of the charger control board, a driving power board, a driving board, a driving adapter board and a power module are stacked in sequence on the second side of the charger control board, an auxiliary power board, a relay board, a sampling board and a capacitor board are arranged on the second side of the charger control board, an electromagnetic filter board and a DC control board are connected along a second direction, and the first direction and the second direction are perpendicular.

[0018] In a third aspect, the present application provides a vehicle, comprising the on-board charger according to the aforementioned method.

[0019] According to the power module, on-board charger and vehicle for the on-board charger of the present application, the power switches of various circuit parts in the on-board charger are integrated together to form a power module, and the remaining components are connected to the power module to be configured into various functional circuits, thereby reducing the space occupied by the individual parts of each device and improving the integration.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 is a circuit topology diagram of the on-board charger provided in an embodiment of the present application; Figure 2 is a schematic diagram of the structure of a power module provided in an embodiment of the present application; Figure 3 It is a layout diagram of power devices of a vehicle charger provided in an embodiment of the present application; Figure 4 It is a schematic diagram of the power flow of the power device of the on-board charger provided in the embodiment of the present application; Figure 5 It is an exploded schematic diagram of a vehicle charger circuit board unit provided in an embodiment of the present application; Figure 6 It is one of the three-dimensional diagrams of the vehicle charger circuit board unit provided in the embodiment of the present application; Figure 7 This is the second stereoscopic diagram of the on-board charger circuit board unit provided in the embodiment of the present application; Figure 8 It is a side view of the vehicle charger circuit board unit provided in an embodiment of the present application.

[0022] Reference numerals: Power factor correction circuit 10, resonant conversion circuit 20, DC conversion circuit 30, power module 40, input electromagnetic filter component 51, correction inductor component 52, bus capacitor component 53, transformer resonance component 54, battery component 55, transformer DC conversion component 56, output electromagnetic filter component 57, charger control board 61, DC control board 62, auxiliary power board 63, drive power board 64, drive board 65, drive adapter board 66, relay board 67, sampling board 68, capacitor board 69, electromagnetic filter board 70, first to eighteenth switching devices Q1~Q18. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0024] In the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "coupled to" or "connected to" another element or an element / circuit is said to be "coupled to" or "connected to" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0025] In the description, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the numerical descriptors used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0026] In addition, descriptions with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0027] Reference Figure 1 , Figure 1 A circuit topology of a vehicle charger is shown. To more clearly illustrate the integrated solution proposed in this application, Figure 1 The circuit topology shown is used as an example for explanation. Of course, the circuit topology of the on-board charger can also be of other types, which can also adopt the integrated solution proposed in this application.

[0028] The switching device involved in the embodiments of the present application may also be referred to as a power switch; illustratively, the switching device may be a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) or an IGBT (Insulated Gate Bipolar Transistor). The present application does not limit the specific type and model of the switching device.

[0029] As an example, Figure 1 As shown, the on-board charger includes a power factor correction circuit 10, a resonant conversion circuit 20 and a DC conversion circuit 30. The power factor correction circuit 10 includes a switch unit, an inductor and a capacitor, wherein the switch unit is a full bridge composed of a first switch device Q1, a second switch device Q2, a third switch device Q3 and a fourth switch device Q4. One end of the inductor is connected to the midpoint of the bridge arm of the full bridge, and the other end is used to connect to the outside (such as a power grid, a load or other vehicles). The capacitor is connected between the full bridge and the resonant conversion circuit 20.

[0030] The power factor correction circuit 10 can convert external AC power into DC power to charge the vehicle. Alternatively, the power factor correction circuit 10 can also convert the vehicle's DC power into AC power and reversely output AC power to the power grid, loads, and other vehicles. The general inverter output is 220VAC.

[0031] The resonant conversion circuit 20 includes a transformer, a primary circuit of the transformer and a secondary circuit of the transformer. The primary circuit includes a full bridge composed of a fifth switch device Q5, a sixth switch device Q6, a seventh switch device Q7 and an eighth switch device Q8; the secondary circuit includes a full bridge composed of a ninth switch device Q9, a tenth switch device Q10, an eleventh switch device Q11 and a twelfth switch device Q12.

[0032] The conductive output side of the secondary circuit of the transformer in the resonant conversion circuit 20 can be connected to the vehicle battery pack. In the charging mode, the resonant conversion circuit 20 steps down the high-voltage DC (such as 800V) to the voltage required by the high-voltage battery pack (such as 400V) through resonance. The resonant conversion circuit 20 in this example adopts a CLLC architecture, which can achieve bidirectional charging. In the reverse charging mode, the resonant conversion circuit 20 boosts the voltage of the high-voltage battery pack (such as 400V) to a high-voltage DC (such as 800V) through resonance.

[0033] The DC conversion circuit 30 also includes a transformer, a primary circuit of the transformer, and a secondary circuit of the transformer. The primary circuit includes a full bridge composed of a thirteenth switch device Q13, a fourteenth switch device Q14, a fifteenth switch device Q15, and a sixteenth switch device Q16; the secondary circuit includes a half bridge composed of a seventeenth switch device Q17 and an eighteenth switch device Q18. The DC conversion circuit 30 can convert the voltage of the battery pack (such as 400V) into a low voltage (such as 13.8V) and transmit it to the low-voltage battery.

[0034] Reference Figure 2 , Figure 2 The structure of a power module 40 is shown. The present application proposes a power module 40 for a vehicle charger. In this embodiment, the power module 40 integrates a first power switch unit, a second power switch unit and a third power switch unit; wherein the first power switch unit is used to construct a power factor correction circuit 10, the second power switch unit is used to construct a resonant conversion circuit 20, and the third power switch unit is used to construct a DC conversion circuit 30.

[0035] by Figure 1 Taking the circuit topology of the vehicle charger shown as an example, the first power switch unit may include a first switch device Q1, a second switch device Q2, a third switch device Q3 and a fourth switch device Q4. The inductor and capacitor in the power factor correction circuit 10 are arranged outside the power module 40, and the first power switch unit is connected to the inductor and capacitor according to the circuit topology to form the power factor correction circuit 10.

[0036] The second power switch unit may include a fifth switch device Q5, a sixth switch device Q6, a seventh switch device Q7, an eighth switch device Q8, a ninth switch device Q9, a tenth switch device Q10, an eleventh switch device Q11 and a twelfth switch device Q12. The transformer and related components in the resonant conversion circuit 20 are arranged outside the power module 40, the fifth switch device Q5, the sixth switch device Q6, the seventh switch device Q7 and the eighth switch device Q8 are connected to the primary side of the transformer according to the circuit topology, and the ninth switch device Q9, the tenth switch device Q10, the eleventh switch device Q11 and the twelfth switch device Q12 are connected to the secondary side of the transformer according to the circuit topology.

[0037] The third power switch unit may include a thirteenth switch device Q13, a fourteenth switch device Q14, a fifteenth switch device Q15, a sixteenth switch device Q16, a seventeenth switch device Q17 and an eighteenth switch device Q18. The transformer and related components in the DC conversion circuit 30 are arranged outside the power module 40, the thirteenth switch device Q13, the fourteenth switch device Q14, the fifteenth switch device Q15 and the sixteenth switch device Q16 are connected to the primary side of the transformer according to the circuit topology, and the seventeenth switch device Q17 and the eighteenth switch device Q18 are connected to the secondary side of the transformer according to the circuit topology.

[0038] The housing of the power module 40 may be provided with connection terminals, such as a gate connection terminal, a source connection terminal and a drain connection terminal. Each connection terminal is connected to each internal power switch and is also used to connect to external devices to form a corresponding circuit topology.

[0039] In the related art, each switch device is usually a discrete device with low space utilization. In this embodiment, after the first power switch unit, the second power switch unit and the third power switch unit are integrated into one, the structure is more compact and the space occupied is small. In addition, a control circuit and a drive circuit board can be used for driving, which saves space and improves power density.

[0040] In some embodiments, the first power switch unit, the second power switch unit, and the third power switch unit are integrally packaged.

[0041] The first power switch unit, the second power switch unit, and the third power switch unit are packaged in one body, which means that the first power switch unit, the second power switch unit, and the third power switch unit are integrated into one body and packaged in one package. For example, the power module 40 includes a shell, and a packaging space is formed inside the shell. The first power switch unit, the second power switch unit, and the third power switch unit are arranged in the packaging space.

[0042] In some embodiments, each switch chip in the first power switch unit, the second power switch unit, and the third power switch unit is integrated into the same semiconductor structure.

[0043] As an example, a semiconductor structure is packaged in the packaging space inside the power module 40, and the semiconductor structure includes a plurality of switch chips, and the switch chip serves as a switch device. Thus, the semiconductor structure can integrate the first to eighteenth switch devices Q1-Q18.

[0044] The switch chips may be arranged in the same layer to facilitate the routing of the switch chips, or the switch chips may be stacked to further reduce the occupied plane space.

[0045] In some embodiments, the package housing of the power module 40 is provided with a heat dissipation structure.

[0046] The heat dissipation structure may include heat dissipation teeth and other structures to improve the heat dissipation effect by increasing the contact area between the package shell and the air. Alternatively, the package shell is further equipped with a fan, which is used to increase the air flow rate of the package shell to improve the heat dissipation efficiency.

[0047] As an example, the heat dissipation structure includes a water cooling unit.

[0048] The water cooling unit may include a water cooling plate, and the power module 40 is disposed on the water cooling plate. Water circulation may be configured in the water cooling plate, and the power module 40 is quickly cooled by the water flow, thereby improving the heat dissipation efficiency.

[0049] An embodiment of the present application further provides an on-board charger, which includes an electronic device unit and the aforementioned power module 40 , wherein the electronic device unit is connected to the power module 40 .

[0050] The electronic device unit includes devices other than the power switch in the on-board charger, such as a transformer, an inductor, a capacitor or a control chip. The electronic device unit and each power switch in the power module 40 are connected according to the circuit topology to form the on-board charger circuit. The circuit topology of the on-board charger and the structure of the power module 40 can refer to the aforementioned embodiments, which also have corresponding effects, and this embodiment will not be repeated here.

[0051] In some embodiments, the electronic device unit includes an inductor, a first transformer, a resonant unit, and a second transformer. The inductor is connected to the first power switch unit in the power module to construct a power factor correction circuit 10, the first transformer and the resonant unit are connected to the second power switch unit in the power module to construct a resonant conversion circuit 20, and the second transformer is connected to the third power switch unit in the power module to construct a DC conversion circuit 30.

[0052] Continue to refer to Figure 1 The first power switch unit includes the first to fourth switch devices Q1~Q4, the second power switch unit includes the fifth to twelfth switch devices Q5~Q12, and the third power switch unit includes the thirteenth to eighteenth switch devices Q13~Q18. The resonant unit may include a capacitor and an inductor, and the connection method of each capacitor, inductor, first transformer and second transformer with the corresponding power switch may also continue to refer to Figure 1 .

[0053] In some embodiments, the electronic device unit includes a plurality of power components, each of which is arranged around the power module 40 .

[0054] The power components may include devices for power transmission such as transformers, inductors and capacitors, etc. The power components are arranged around the power module 40, so that the entire power layout is relatively compact, and the devices and the power module 40 are relatively concentrated.

[0055] Reference Figure 3 , Figure 3 The power device layout diagram of a vehicle charger is shown. As an example, the multiple power components include an input electromagnetic filter component 51, a correction inductor component 52, a bus capacitor component 53, a transformer resonance component 54, a battery component 55, a transformer DC conversion component 56 and an output electromagnetic filter component 57.

[0056] Combination Figure 1 The correction inductor component 52 may include the inductor of the input side of the full bridge formed by the first to fourth switching devices Q1~Q4, and the bus capacitor component 53 may include the capacitor of the output side of the full bridge formed by the first to fourth switching devices Q1~Q4. The transformer resonance component 54 may include a transformer, a resonant inductor, a resonant capacitor, and a sampling element between the primary full bridge formed by the fifth to eighth switching devices Q5~Q8 and the secondary full bridge formed by the ninth to twelfth switching devices Q9~Q12. The transformer DC conversion component 56 may include a transformer between the primary full bridge formed by the thirteenth to sixteenth switching devices Q13~Q16 and the secondary half bridge formed by the seventeenth to eighteenth switching devices Q17~Q18. Of course, the composition of each power component may not be limited to Figure 1 Components shown.

[0057] Reference Figure 4 , Figure 4 Shows Figure 3 In some embodiments, a plurality of first lines and a plurality of second lines are provided between the power module 40 and each power component, the power flows in the first lines and the second lines are different, and the first lines and the second lines are alternately arranged along the circumference of the power module 40 .

[0058] The power flow direction of the first circuit can be from the power component to the power module 40, and the power flow direction of the first circuit can be from the power module 40 to the power component. When arranging the power components, the power flow is made to go out from the integrated power module 40, go in, go out again, go in again, and cycle many times. The overall power stroke is a daisy-shaped annular power loop, which is similar to the ring formed by the petals of a chrysanthemum. The current directions of the two adjacent circuits are opposite, which can reduce crosstalk. Therefore, when the power components and the power module 40 are centrally arranged, the crosstalk can be reduced while the power density is increased.

[0059] In other examples, the positions of the power components may also be arranged in shapes such as rectangles, squares, or diamonds.

[0060] In some embodiments, the on-board charger further includes a plurality of control circuits and drive circuits. The control circuits and drive circuits are configured as a plurality of circuit boards. Each circuit board is connected to the power module 40 for driving the power module 40 .

[0061] The control circuit and the driving circuit board are configured with a control circuit and a driving circuit, which are mainly used to control and drive the power module 40, and may include a corresponding main control circuit, a driving circuit, a sampling monitoring circuit, and the like.

[0062] As an example, the main control circuit may include a control chip and chip peripheral circuits. The control chip may be implemented using an MCU (Microcontroller Unit) chip; it may also be implemented based on a DSP (Digital Signal Processor) chip, an FPGA (Field-Programmable Gate Array) or a custom controller chip; the embodiments of the present application do not impose any restrictions on the specific implementation hardware of the controller.

[0063] The driving circuit may include a driving power supply circuit and a signal output circuit, etc. The driving power supply circuit may be used to provide a driving positive voltage and a driving negative voltage required to drive the power switch, and the signal output circuit is used to provide a corresponding driving signal to the power switch based on the driving power supply.

[0064] The sampling monitoring circuit may include current sampling and / or temperature sampling, which is used to detect the operating state of the on-board charger to adjust the operation of each power switch in the power module 40 .

[0065] The control circuit and the drive circuit can configure each part of the circuit separately on a PCB board, for example, the main control circuit uses a PCB board, the drive circuit uses a PCB board, and the sampling and monitoring circuit uses a PCB board, and the three circuit boards are connected to each other. Therefore, by dividing the control circuit and the drive circuit into multiple PCB boards, the flexibility of PCB board configuration can be improved, which is conducive to improving space utilization.

[0066] Reference Figures 5 to 8 , Figure 5 An exploded schematic diagram of a control circuit, a drive circuit board and a power module 40 is shown. Figure 6 One of the three-dimensional diagrams of a unit composed of a control circuit, a driving circuit board and a power module 40 is shown, Figure 7 The second stereogram shows a unit composed of a control circuit, a driving circuit board and a power module 40. Figure 8 A side view of a unit composed of a control circuit, a driving circuit board and a power module 40 is shown.

[0067] In some embodiments, the multiple circuit boards include a charger control board 61, a DC control board 62, an auxiliary power board 63, a drive power board 64, a drive board 65, a drive adapter board 66, a relay board 67, a sampling board 68, a capacitor board 69 and an electromagnetic filter board 70 that are interconnected.

[0068] The auxiliary power board 63 is connected to each circuit board to supply power to each circuit board. The charger control board 61 is the core control board of the vehicle charger and may be provided with a main control chip and a corresponding main control circuit.

[0069] The DC control board 62 can be connected to the power module through the driving adapter board 66 to drive the power switch corresponding to the DC conversion circuit 30 .

[0070] The driving board 65 can be connected to the power module through the driving adapter board 66 to drive the power switches corresponding to the power factor correction circuit 10 and the resonant conversion circuit 20 .

[0071] The driving power supply board 64 is used to be connected to the driving power supply board 64 and the driving board 65 respectively, and is used to provide a driving positive voltage and a driving negative voltage required for driving the power switch.

[0072] The relay board 67 is used to set relays and corresponding devices, and is used to control the on and off of each circuit in the control circuit and the drive circuit to start or close the corresponding circuit.

[0073] The sampling board 68 is used to set the devices required for the on-board charger to implement the sampling function, such as the sampling circuit.

[0074] The capacitor plate 69 is used to set capacitors and corresponding devices. This part of the capacitors can be the capacitors required to be configured in the control circuit and the drive circuit. Setting them independently as a circuit board facilitates layout and saves space.

[0075] The electromagnetic filter board 70 can be connected between the control circuit and the drive circuit and the external circuit to filter the signal or power supply and reduce electromagnetic interference.

[0076] The specific circuit topology and components of the above-mentioned circuit boards can be set according to requirements, and this embodiment does not limit this.

[0077] In some embodiments, the circuit boards are connected in a stacked manner.

[0078] It is understandable that circuit board stacking can reduce the space occupied on a single plane and improve the integration, making the on-board charger have ultra-high density, ultra-small size and ultra-high integration.

[0079] As an example, the charger control board 61 has a first side and a second side opposite to each other along a first direction, the DC control board 62 is arranged on the first side of the charger control board 61, the driving power board 64, the driving board 65, the driving adapter board 66 and the power module 40 are stacked in sequence on the second side of the charger control board 61, the auxiliary power board 63, the relay board 67, the sampling board 68 and the capacitor board 69 are arranged on the second side of the charger control board 61, the electromagnetic filter board 70 and the DC control board 62 are connected along the second direction, and the first direction and the second direction are perpendicular.

[0080] like Figures 5 to 8 As shown, the first direction may be the vertical direction y, and the second direction may be the horizontal direction x. The DC control board 62, the charger control board 61, the drive power board 64, the drive board 65, the drive adapter board 66 and the power module 40 are stacked in the vertical direction, which can shorten the wiring and reduce the space occupied in the horizontal direction.

[0081] The auxiliary power board 63, relay board 67, sampling board 68 and capacitor board 69 are mainly auxiliary units. They are directly connected to the charger control board 61 to simplify the wiring. At the same time, the horizontal space occupation can be reduced to a certain extent by stacking. The electromagnetic filter board 70 is arranged at the same level as the charger control board 61 for easy connection due to its large area. This makes the on-board charger have ultra-high density, ultra-small size and ultra-high integration.

[0082] An embodiment of the present application further provides a vehicle, including the vehicle-mounted charger according to the above. The specific structure and principle of the vehicle-mounted charger can refer to the above embodiments, which also have corresponding technical effects, and this embodiment will not be repeated here.

[0083] The present application provides a power module for an on-board charger, an on-board charger and a vehicle, wherein the power switches of various circuit parts in the on-board charger are integrated together to form a power module, and the remaining components are connected to the power module to form various functional circuits, thereby reducing the space occupied by the individual parts of each device and improving the integration.

[0084] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A power module for a vehicle charger, characterized in that: The on-board charger includes a power factor correction circuit, a resonant conversion circuit and a DC conversion circuit, and the power module integrates a first power switch unit, a second power switch unit and a third power switch unit; Among them, the first power switch unit is used to construct the power factor correction circuit, the second power switch unit is used to construct the resonant conversion circuit, and the third power switch unit is used to construct the DC conversion circuit.

2. The power module according to claim 1, characterized in that: The first power switch unit, the second power switch unit and the third power switch unit are integrally packaged.

3. The power module according to claim 2, characterized in that: Each switch chip in the first power switch unit, the second power switch unit and the third power switch unit is integrated into the same semiconductor structure.

4. The power module according to any one of claims 1 to 3, characterized in that: The packaging shell of the power module is provided with a heat dissipation structure.

5. The power module according to claim 4, characterized in that: The heat dissipation structure includes a water cooling unit.

6. A vehicle-mounted charger, characterized in that: The on-board charger comprises an electronic device unit and a power module according to any one of claims 1 to 4, wherein the electronic device unit is connected to the power module.

7. The vehicle-mounted charger according to claim 6, characterized in that: The electronic device unit includes a plurality of power components, each of which is arranged around the power module.

8. The vehicle-mounted charger according to claim 7, characterized in that: At least one first line and at least one second line are provided between the power module and each of the power components. The power flows in the first line and the second line are different. The first line and the second line are alternately arranged along the circumference of the power module.

9. The vehicle-mounted charger according to claim 8, characterized in that: The power component comprises an input electromagnetic filter component, a correction inductor component, a bus capacitor component, a transformer resonance component, a battery component, a transformer DC conversion component and an output electromagnetic filter component.

10. The vehicle-mounted charger according to any one of claims 7 to 9, characterized in that: The electronic device unit includes an inductor, a first transformer, a resonant unit and a second transformer. The inductor is connected to the first power switch unit in the power module to construct the power factor correction circuit. The first transformer and the resonant unit are connected to the second power switch unit in the power module to construct a resonant conversion circuit. The second transformer is connected to the third power switch unit in the power module to construct a DC conversion circuit.

11. The vehicle-mounted charger according to any one of claims 7 to 9, characterized in that: The on-board charger further includes a control circuit and a drive circuit. The control circuit and the drive circuit are configured as a plurality of circuit boards. Each of the circuit boards is connected to the power module for driving the power module.

12. The vehicle-mounted charger according to claim 11, characterized in that: The circuit boards are stacked and connected.

13. The vehicle-mounted charger according to claim 12, characterized in that: The multiple circuit boards include a charger control board, a DC control board, an auxiliary power board, a drive power board, a drive board, a drive adapter board, a relay board, a sampling board, a capacitor board and an electromagnetic filter board which are connected to each other.

14. The vehicle-mounted charger according to claim 13, characterized in that: The charger control board has a first side and a second side opposite to each other along a first direction, the DC control board is arranged on the first side of the charger control board, the drive power board, the drive board, the drive adapter board and the power module are stacked in sequence on the second side of the charger control board, the auxiliary power board, the relay board, the sampling board and the capacitor board are arranged on the second side of the charger control board, the electromagnetic filter board and the DC control board are connected along a second direction, and the first direction and the second direction are perpendicular.

15. A vehicle, characterized in that: It comprises an on-board charger according to any one of claims 6-14.

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