Power module for on-board charger, on-board charger and vehicle

Abstract

The present application discloses a power module for an on-board charger, an on-board charger, and a vehicle, belonging to the technical field of on-board chargers. The power module of the on-board charger includes a power factor correction circuit, a resonant conversion circuit, and a DC conversion circuit. The power module 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, 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. 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 configure various functional circuits, thereby reducing the space occupied by the individual parts of each device and improving the integration.

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] The rapid development of electric vehicles is placing increasing demands on onboard chargers for new energy vehicles. These chargers must not only provide basic functions such as charging and reverse discharge, but also require increased power density, greater integration, and reduced device size. Currently, the integration level of onboard chargers still needs to be improved. Summary of the Invention

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

[0004] In a first aspect, the present application provides a power module for an on-board charger, the on-board charger including 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;

[0005] 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.

[0006] 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.

[0007] According to an embodiment of the present application, the switch chips in the first power switch unit, the second power switch unit, and the third power switch unit are integrated into the same semiconductor structure.

[0008] According to one embodiment of the present application, a packaging shell of the power module is provided with a heat dissipation structure.

[0009] According to one embodiment of the present application, the heat dissipation structure includes a water cooling unit.

[0010] 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.

[0011] According to one 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.

[0012] 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 different directions on the first line and the second line. The first line and the second line are alternately arranged along the circumference of the power module.

[0013] 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.

[0014] 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.

[0015] 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 multiple circuit boards. Each circuit board is connected to a power module for driving the power module.

[0016] According to one embodiment of the present application, the circuit boards are connected in a stacked manner.

[0017] 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.

[0018] According to one embodiment of the present application, 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 the second direction, and the first direction and the second direction are perpendicular.

[0019] In a third aspect, the present application provides a vehicle comprising the aforementioned on-board charger.

[0020] According to the power module, on-board charger, and vehicle for an 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.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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:

[0023] Figure 1 This is a circuit topology diagram of the on-board charger provided in an embodiment of the present application;

[0024] Figure 2 Schematic diagram of the structure of the power module provided in the embodiment of the present application;

[0025] Figure 3 This is a layout diagram of power devices of an on-board charger provided in an embodiment of the present application;

[0026] Figure 4 This is a schematic diagram of the power flow of the power devices of the on-board charger provided in an embodiment of the present application;

[0027] Figure 5 This is an exploded schematic diagram of the on-board charger circuit board unit provided in an embodiment of the present application;

[0028] Figure 6 This is one of the three-dimensional views of the on-board charger circuit board unit provided in an embodiment of the present application;

[0029] Figure 7 This is the second three-dimensional diagram of the on-board charger circuit board unit provided in an embodiment of the present application;

[0030] Figure 8 This is a side view of the on-board charger circuit board unit provided in an embodiment of the present application.

[0031] Reference numerals:

[0032] 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 resonant 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 supply board 63, drive power supply 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

[0033] The following describes in detail embodiments of the present application. 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 are not to be construed as limiting the present application.

[0034] In the following description, a "circuit" refers to a conductive loop consisting of at least one element or subcircuit connected electrically or electromagnetically. When an element or circuit is said to be "coupled to" or "connected to" another element, or when an element / circuit is said to be "coupled to" or "connected between" two nodes, it can be directly coupled or connected to the other element or there can be intervening elements. The connection between the elements can be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there are no intervening elements between the two elements.

[0035] In the description, the terms "first," "second," etc. are used to distinguish similar objects, not to describe a particular order or precedence. It should be understood that the numerical descriptors used in this manner are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," etc. are generally of a class and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0036] In addition, descriptions with reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0037] Reference Figure 1 , Figure 1 The circuit topology of a vehicle charger is shown. 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.

[0038] The switching devices involved in the embodiments of the present application may also be referred to as power switches; illustratively, the switching devices may be MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors) or IGBTs (Insulated Gate Bipolar Transistors). The present application does not limit the specific types and models of the switching devices.

[0039] As an example, Figure 1 As shown, the on-board charger includes a power factor correction circuit 10, a resonant converter circuit 20, and a DC converter circuit 30. The power factor correction circuit 10 includes a switching unit, an inductor, and a capacitor. The switching unit is a full bridge consisting of a first switching device Q1, a second switching device Q2, a third switching device Q3, and a fourth switching device Q4. One end of the inductor is connected to the midpoint of an arm of the full bridge, and the other end is used to connect to an external device (such as the power grid, a load, or another vehicle). The capacitor is connected between the full bridge and the resonant converter circuit 20.

[0040] 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 output the AC power to the grid, loads, and other vehicles. The inverter output is generally 220VAC.

[0041] The resonant converter 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 consisting of a fifth switching device Q5, a sixth switching device Q6, a seventh switching device Q7, and an eighth switching device Q8; the secondary circuit includes a full-bridge consisting of a ninth switching device Q9, a tenth switching device Q10, an eleventh switching device Q11, and a twelfth switching device Q12.

[0042] The conductive output side of the secondary circuit of the transformer in the resonant converter circuit 20 can be connected to the vehicle's battery pack. In charging mode, the resonant converter circuit 20 uses resonance to step down the high-voltage DC voltage (e.g., 800V) to the voltage required by the high-voltage battery pack (e.g., 400V). In this example, the resonant converter circuit 20 uses a CLLC architecture, enabling bidirectional charging. In reverse charging mode, the resonant converter circuit 20 uses resonance to step up the voltage of the high-voltage battery pack (e.g., 400V) to a high-voltage DC voltage (e.g., 800V).

[0043] The DC converter circuit 30 also includes a transformer, its primary circuit, and its secondary circuit. The primary circuit comprises a full-bridge consisting of a thirteenth switching device Q13, a fourteenth switching device Q14, a fifteenth switching device Q15, and a sixteenth switching device Q16; the secondary circuit comprises a half-bridge consisting of a seventeenth switching device Q17 and an eighteenth switching device Q18. The DC converter circuit 30 converts the battery pack voltage (e.g., 400V) to a low voltage (e.g., 13.8V) for transmission to the low-voltage battery.

[0044] Reference Figure 2 , Figure 2 The structure of a power module 40 is shown. This application proposes a power module 40 for an on-board 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. 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.

[0045] by Figure 1 Taking the illustrated circuit topology of an on-board charger 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 disposed externally to the power module 40. 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.

[0046] 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 disposed 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. 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.

[0047] The third power switch unit may include a thirteenth switching device Q13, a fourteenth switching device Q14, a fifteenth switching device Q15, a sixteenth switching device Q16, a seventeenth switching device Q17, and an eighteenth switching device Q18. The transformer and related components in the DC conversion circuit 30 are disposed outside the power module 40. The thirteenth switching device Q13, the fourteenth switching device Q14, the fifteenth switching device Q15, and the sixteenth switching device Q16 are connected to the primary side of the transformer according to the circuit topology, and the seventeenth switching device Q17 and the eighteenth switching device Q18 are connected to the secondary side of the transformer according to the circuit topology.

[0048] 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 of which is connected to each internal power switch and is also used to connect to external devices to form a corresponding circuit topology.

[0049] In related technologies, each switching device is typically a discrete component, resulting in low space utilization. In this embodiment, the first, second, and third power switching units are integrated into a single unit, resulting in a more compact structure and reduced space usage. Furthermore, a single control circuit and driver circuit board can be used for driving, saving space and increasing power density.

[0050] In some embodiments, the first power switch unit, the second power switch unit, and the third power switch unit are integrally packaged.

[0051] The first, second, and third power switch units are integrally packaged, meaning that the first, second, and third power switch units are integrated into a single package. For example, the power module 40 includes a housing, within which a packaging space is formed. The first, second, and third power switch units are disposed within the packaging space.

[0052] In some embodiments, the switch chips in the first power switch unit, the second power switch unit, and the third power switch unit are integrated into the same semiconductor structure.

[0053] As an example, a semiconductor structure is encapsulated in the packaging space within the power module 40, and the semiconductor structure includes multiple switch chips, each of which serves as a switch device. Thus, the semiconductor structure can integrate the first to eighteenth switch devices Q1-Q18.

[0054] The switch chips can be arranged in the same layer to facilitate wiring of the switch chips. Alternatively, the switch chips can be stacked to further reduce the occupied plane space.

[0055] In some embodiments, the package housing of the power module 40 is provided with a heat dissipation structure.

[0056] 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 may be further equipped with a fan to increase the air flow rate of the package shell to improve the heat dissipation efficiency.

[0057] As an example, the heat dissipation structure includes a water cooling unit.

[0058] The water cooling unit may include a water cooling plate, on which the power module 40 is disposed. Water circulation may be configured in the water cooling plate, so that the power module 40 is quickly cooled by the water flow, thereby improving heat dissipation efficiency.

[0059] 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 .

[0060] The electronic device unit includes components other than the power switches in the on-board charger, such as transformers, inductors, capacitors, or control chips. The electronic device unit and the power switches in the power module 40 are connected according to a 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 be referenced in the aforementioned embodiments, which also have corresponding effects and are not further described in this embodiment.

[0061] 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.

[0062] Continue to refer to Figure 1 The first power switch unit includes the first to fourth switch devices Q1 to Q4, the second power switch unit includes the fifth to twelfth switch devices Q5 to Q12, and the third power switch unit includes the thirteenth to eighteenth switch devices Q13 to Q18. The resonant unit may include capacitors and inductors. The connection method of each capacitor, inductor, first transformer and second transformer with the corresponding power switch can also be continued to refer to Figure 1 .

[0063] In some embodiments, the electronic device unit includes a plurality of power components, each of which is arranged around the power module 40 .

[0064] The power components may include devices for power transmission such as transformers, inductors, and capacitors. The power components are arranged around the power module 40, which can make the entire power layout more compact and the components and the power module 40 relatively concentrated.

[0065] Reference Figure 3 , Figure 3 A diagram showing the layout of power components in a vehicle-mounted charger is shown. As an example, the multiple power components include an input electromagnetic filter component 51, a correction inductor component 52, a busbar capacitor component 53, a transformer resonant component 54, a battery component 55, a transformer DC conversion component 56, and an output electromagnetic filter component 57.

[0066] Combine Figure 1 The correction inductor component 52 may include the inductor on 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 on 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.

[0067] Reference Figure 4 , Figure 4 Shown Figure 3 Corresponding power flow diagram. In some embodiments, multiple first lines and multiple second lines are provided between the power module 40 and each power component, the power flows in different directions on the first lines and the second lines, and the first lines and the second lines are alternately arranged along the circumference of the power module 40.

[0068] The power flow of the first circuit can be from the power assembly to the power module 40, and the power flow of the first circuit can be from the power module 40 to the power assembly. When arranging the power assemblies, the power flow is made to go out from the integrated power module 40, then go in, then go out again, then go in again, and repeat this cycle many times. The overall power flow is a chrysanthemum-shaped ring 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 assemblies and the power module 40 are arranged in a centralized manner, the power density can be increased while reducing crosstalk.

[0069] In other examples, the positions of the power components may also be arranged in a rectangle, square, or diamond shape.

[0070] In some embodiments, the on-board charger further includes multiple control circuits and drive circuits. The control circuits and drive circuits are configured as multiple circuit boards. Each circuit board is connected to the power module 40 to drive the power module 40 .

[0071] The control circuit and the driving circuit board are provided 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 and a sampling monitoring circuit.

[0072] As an example, the main control circuit may include a control chip and chip peripheral circuits. The control chip can be implemented using an MCU (Microcontroller Unit) chip; it can also be 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 limit the specific implementation hardware of the controller.

[0073] 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 the driving positive voltage and driving negative voltage required to drive the power switch, and the signal output circuit may be used to provide a corresponding driving signal to the power switch based on the driving power supply.

[0074] The sampling and monitoring circuit may include current sampling and / or temperature sampling, and is used to detect the operating status of the on-board charger to adjust the operation of each power switch in the power module 40 .

[0075] The control and drive circuits can each be configured on a separate PCB. For example, the main control circuit uses one PCB, the drive circuit uses another, and the sampling and monitoring circuit uses another. These three PCBs are interconnected. By dividing the control and drive circuits into multiple PCBs, the flexibility of PCB layout is increased, which helps improve space utilization.

[0076] Reference Figures 5 to 8 , Figure 5 An exploded schematic diagram of a unit consisting of a control circuit, a driver 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 perspective view 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 consisting of a control circuit, a driving circuit board and a power module 40 is shown.

[0077] 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.

[0078] 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 corresponding main control circuit.

[0079] The DC control board 62 can be connected to the power module through the drive adapter board 66 to drive the power switch corresponding to the DC conversion circuit 30.

[0080] 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.

[0081] 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.

[0082] The relay board 67 is used to set relays and corresponding devices for controlling the on and off of each circuit in the control circuit and the drive circuit to start or close the corresponding circuit.

[0083] 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.

[0084] 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 it as an independent circuit board facilitates layout and saves space.

[0085] The electromagnetic filter board 70 can be connected between the control circuit, the drive circuit and the external circuit to filter the signal or power supply and reduce electromagnetic interference.

[0086] The specific circuit topology and components of each of the above-mentioned circuit boards can be set according to needs, and this embodiment does not limit this.

[0087] In some embodiments, the circuit boards are connected in a stacked manner.

[0088] 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.

[0089] 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 drive power board 64, the drive board 65, the drive 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.

[0090] like Figures 5 to 8 As shown, the first direction can be the vertical direction y, and the second direction can be the horizontal direction x. The DC control board 62, charger control board 61, drive power board 64, drive board 65, drive adapter board 66, and power module 40 are stacked in the vertical direction, which can shorten the wiring and reduce the space occupied in the horizontal direction.

[0091] Auxiliary power board 63, relay board 67, sampling board 68, and capacitor board 69 are primarily auxiliary components. Their direct connection to the charger control board 61 simplifies wiring and, to a certain extent, reduces horizontal space usage through stacking. Due to its large area, electromagnetic filter board 70 is placed horizontally with the charger control board 61 for ease of connection. This results in an onboard charger with ultra-high density, ultra-compact size, and ultra-high integration.

[0092] An embodiment of the present application further provides a vehicle, including the aforementioned on-board charger. The specific structure and principle of the on-board charger can refer to the aforementioned embodiments, which also have corresponding technical effects, and this embodiment will not be repeated here.

[0093] The present application provides a power module for an on-board charger, an on-board charger, and a vehicle. 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 configure various functional circuits, thereby reducing the space occupied by the individual parts of each device and improving the integration.

[0094] 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 intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A vehicle-mounted charger, characterized in that: The on-board charger includes an electronic device unit and a power module, the electronic device unit is connected to the power module, 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; 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; 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; The on-board charger also includes 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. 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 supply 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 supply board, the relay board, the sampling board and the capacitor board are arranged on the second side of the charger control board, and 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.

2. The on-board charger according to claim 1, characterized in that: The packaging shell of the power module is provided with a heat dissipation structure.

3. The on-board charger according to claim 2, characterized in that: The heat dissipation structure includes a water cooling unit.

4. The on-board charger according to any one of claims 1 to 3, characterized in that: The electronic device unit includes a plurality of power components, each of which is arranged around the power module.

5. The on-board charger according to claim 4, 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 different directions on the first line and the second line. The first line and the second line are alternately arranged along the circumference of the power module.

6. The on-board charger according to claim 5, characterized in that: The power component includes 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.

7. The on-board charger according to any one of claims 1 to 3, 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.

8. A vehicle, characterized in that: The vehicle charger comprises the vehicle charger according to any one of claims 1 to 7.

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