Inverter, electric drive assembly, and vehicle

Abstract

Disclosed are an inverter, an electric drive assembly and a vehicle, wherein the inverter comprises a housing, a first circuit board and a second circuit board, the first circuit board being mounted on the housing, the second circuit board being connected to the first circuit board, and the second circuit board and the first circuit board being arranged in a stacked manner; the electric drive assembly comprises the inverter; and the vehicle comprises the inverter or the electric drive assembly.

Description

Inverters, electric drive assemblies and vehicles

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202421607397.6, filed in China on July 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of inverter technology, and more particularly to an inverter, an electric drive assembly, and a vehicle. Background Technology

[0004] In electric vehicles, inverters generally have two main functions: inversion and rectification. The inversion function converts the high-voltage DC power input from the battery into three-phase AC power to drive the motor. The rectification function converts the three-phase AC power generated by the range extender-driven generator into high-voltage DC power to charge the battery or directly power the drive motor.

[0005] Because inverters need to have both inverter and rectification functions, the inverters installed in existing electric vehicles have complex structures, many parts, high manufacturing costs, and large sizes. Summary of the Invention

[0006] The purpose of this disclosure is to provide an inverter, electric drive assembly, and vehicle that have a simple structure, fewer parts, low manufacturing cost, and small size.

[0007] On the one hand, this disclosure provides an inverter in the embodiments, including:

[0008] case;

[0009] A first circuit board is mounted on the housing; and

[0010] The second circuit board is connected to the first circuit board and is stacked in the thickness direction of the inverter.

[0011] In some embodiments, the inverter further includes:

[0012] The filter is mounted to the housing using potting compound;

[0013] A capacitor, electrically connected to the filter, is mounted to the housing using potting compound; and

[0014] A high-voltage input connector is electrically connected to the filter and is mounted on the housing.

[0015] In some embodiments, the copper busbars connecting the filter and the capacitor are connected by welding.

[0016] In some embodiments, the electrical connection between the filter and the capacitor is encapsulated by potting.

[0017] In some embodiments, a portion of the filter structure is potted and / or the capacitor is fully potted.

[0018] In some embodiments, the housing is provided with a first baffle, and the high-voltage input connector and the filter are located on both sides of the first baffle; and / or

[0019] The housing is provided with a second retaining wall, which surrounds the outer perimeter of the second circuit board.

[0020] In some embodiments, the inverter further includes a power module electrically connected to the capacitor, and the first circuit board integrates a control circuit and a drive circuit for the power module and is electrically connected to the power module.

[0021] In some embodiments, the first circuit board is provided with a first connector, and the second circuit board is provided with a second connector. The first circuit board and the second circuit board are communicatively connected through the first connector and the second connector that are plugged into each other.

[0022] In some embodiments, the housing is provided with a third retaining wall, and the second circuit board integrates a low-voltage signal connector, the low-voltage signal connector and the second connector are located on both sides of the third retaining wall.

[0023] In some embodiments, the second circuit board integrates a port filter circuit for filtering low-voltage signals.

[0024] In some embodiments, the housing is provided with a fourth retaining wall, and the control circuit and the drive circuit of the power module are located on both sides of the fourth retaining wall.

[0025] In some embodiments, the control circuit is positioned opposite the second circuit board in the thickness direction of the inverter.

[0026] In some embodiments, each of the three-phase bridge arms of the power module is provided with a first input copper busbar, and the connection surface of the first input copper busbar is parallel to the thickness direction of the inverter.

[0027] The capacitor has a first output copper busbar, the connection surface of the first output copper busbar is parallel to the thickness direction of the inverter, and the connection surface of the first output copper busbar and the connection surface of the first input copper busbar abut against each other and are welded together.

[0028] In some embodiments, each of the three-phase bridge arms of the power module is provided with a second input copper busbar, the connection surface of the second input copper busbar is perpendicular to the thickness direction of the inverter, and the capacitor has a second output copper busbar, the connection surface of the second output copper busbar is parallel to the thickness direction of the inverter;

[0029] The second output copper busbar and the second input copper busbar are connected by a transition copper busbar. One connecting surface of the transition copper busbar abuts against and is welded to the connecting surface of the second output copper busbar, and the other connecting surface of the transition copper busbar abuts against and is welded to the connecting surface of the second input copper busbar.

[0030] In some embodiments, the housing is provided with a water pipe fixing part and / or a first wire harness fixing part.

[0031] In some embodiments, an outer housing is also included, which covers the outside of the filter and the capacitor and is connected to the housing, with a portion of the high-voltage input connector located outside the outer housing and a portion of the high-voltage input connector extending into the outer housing.

[0032] In some embodiments, the outer casing is provided with an air filter fixing part and / or a second wiring harness fixing part.

[0033] On the other hand, this disclosure provides an electric drive assembly, including the inverter described above, in embodiments.

[0034] In another aspect, this disclosure provides a vehicle in the embodiments, including the inverter or the electric drive assembly described above.

[0035] The beneficial effects achieved by the technical solutions provided in the embodiments of this disclosure are as follows:

[0036] By stacking the first and second circuit boards in the thickness direction of the inverter, the space in the thickness direction of the inverter is utilized more efficiently, thereby simplifying the overall structure, reducing the number of parts, lowering the manufacturing cost, and reducing the size. Attached Figure Description

[0037] Figure 1 is a schematic diagram of the inverter according to an embodiment of this disclosure;

[0038] Figure 2 is a schematic diagram of the inverter with the outer casing omitted according to an embodiment of the present disclosure;

[0039] Figure 3 is a schematic diagram of the inverter described in this embodiment of the present disclosure, omitting the outer casing and potting compound;

[0040] Figure 4 is a schematic diagram of the structure of the housing, the first circuit board and the second circuit board in cooperation according to an embodiment of the present disclosure;

[0041] Figure 5 is a schematic diagram of the disassembly structure of the housing and the second circuit board according to an embodiment of this disclosure;

[0042] Figure 6 is a schematic diagram of the disassembly structure of the housing and the second circuit board according to an embodiment of this disclosure;

[0043] Figure 7 is a schematic diagram of the structure of the first output copper bus, the second output copper bus, the first input copper bus, the second input copper bus, and the adapter copper bus according to an embodiment of the present disclosure.

[0044] Figure 8 is a schematic diagram of the structure of the first output copper busbar, the second output copper busbar, the first input copper busbar, and the second input copper busbar in accordance with the embodiments of this disclosure.

[0045] In the diagram: 1. Housing; 11. First retaining wall; 12. Second retaining wall; 13. Third retaining wall; 14. Fourth retaining wall; 15. Water pipe fixing part; 16. First wiring harness fixing part; 2. Filter; 3. Capacitor; 31. First output copper busbar; 32. Second output copper busbar; 4. High-voltage input connector; 5. Power module; 51. First input copper busbar; 52. Second input copper busbar; 6. First circuit board; 61. First connector; 7. Second circuit board; 71. Low-voltage signal connector; 72. Second connector; 8. Adapter copper busbar; 9. Outer casing; 91. Air filter fixing part; 92. Second wiring harness fixing part. Detailed Implementation

[0046] The embodiments of this disclosure are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0047] In the description of this disclosure, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0048] In the description of this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] The technical solution of this disclosure will be further described below with reference to the accompanying drawings and specific embodiments.

[0050] As shown in Figures 1-8, this disclosure provides an inverter in an embodiment, including a housing 1, a first circuit board 6, and a second circuit board 7. The first circuit board 6 and the second circuit board 7 are respectively mounted on the housing 1, the second circuit board 7 and the first circuit board 6 are connected, and are stacked in the thickness direction of the inverter.

[0051] In the embodiments disclosed herein, by stacking the first circuit board 6 and the second circuit board 7 in the thickness direction of the inverter, the space in the thickness direction of the inverter is utilized more efficiently, thereby simplifying the overall structure, reducing the number of parts, lowering the manufacturing cost, and reducing the volume.

[0052] In the embodiments of this disclosure, the second circuit board 7 is located between the housing 1 and the first circuit board 6, which facilitates the connection and assembly of the second circuit board 7 with other components.

[0053] In other embodiments, the second circuit board 7 may also be located on the side of the first circuit board 6 away from the housing 1.

[0054] Specifically, the inverter also includes a filter 2, a capacitor 3, and a high-voltage input connector 4. The filter 2 and capacitor 3 are both mounted to the housing 1 using potting compound. The high-voltage input connector 4 is mounted on the housing 1, and the capacitor 3 and high-voltage input connector 4 are electrically connected to the filter 2.

[0055] In the embodiments of this disclosure, the filter 2 and capacitor 3 are respectively mounted on the housing 1 with potting compound, thereby eliminating their respective outer plastic shell structures and fixing screws that are fixed to the housing 1, realizing integration, meeting the design requirements of heat dissipation, insulation, and moisture protection of the filter 2 and capacitor 3 cores, further simplifying the overall structure, reducing the number of parts, lowering the manufacturing cost, and reducing the volume.

[0056] In the embodiments disclosed herein, four independent components—housing 1, filter 2, capacitor 3, and high-voltage input connector 4—are encapsulated into a single unit using epoxy potting compound, achieving the integration of high-voltage DC components. The filter 2 and capacitor 3 eliminate the need for auxiliary materials such as filter housings, capacitor housings, Y-capacitor housings, fixing screws, heat dissipation substrates, and thermal grease found in traditional solutions, and are directly encapsulated and fixed using epoxy resin. This simultaneously meets the key design requirements of heat dissipation, insulation, and moisture protection for the cores of the filter 2 and capacitor 3.

[0057] In other embodiments, potting compounds made primarily of other types of thermosetting resins, such as polyester resin and vinyl ester, can be used for potting and encapsulation, depending on actual usage requirements.

[0058] Specifically, the copper busbars connecting filter 2 and capacitor 3 are connected by welding. The positive and negative copper busbars between filter 2 and capacitor 3 are connected by welding, eliminating the need for fixing screws and simplifying the design.

[0059] In the embodiments of this disclosure, the positive and negative copper busbars between the filter 2 and the capacitor 3 are connected by laser welding, which improves the effect and reliability of the connection assembly. In other embodiments, the positive and negative copper busbars between the filter 2 and the capacitor 3 can also be electrically connected by resistance welding.

[0060] More specifically, the electrical connection between filter 2 and capacitor 3 is encapsulated using potting compound. In the prior art, plastic insulating parts are required between the positive and negative copper busbars and the housing 1 due to electrical safety requirements. Encapsulating the electrical connection between filter 2 and capacitor 3 using potting compound eliminates the need for a plastic insulating base. Furthermore, when using epoxy potting compound for encapsulation, the high dielectric strength of the epoxy potting compound allows for a further reduction in the nominal design gap between the copper busbar and the housing 1, thus further reducing the size of the electrical control unit.

[0061] Specifically, part of the structure of filter 2 is encapsulated with potting compound. Filter 2 is partially encapsulated within housing 1, efficiently and reliably ensuring key design requirements such as heat dissipation and insulation.

[0062] More specifically, capacitor 3 is fully encapsulated with potting compound. Capacitor 3 is fully encapsulated to ensure moisture protection for the core after its durability is achieved.

[0063] In the embodiments of this disclosure, the high-voltage input connector 4 is electrically connected to the filter 2 by screws, which makes disassembly and assembly more convenient and the cost lower.

[0064] In other embodiments, the high-voltage input connector 4 and the filter 2 can also be electrically connected by laser welding or resistance welding. The potting volume of the filter 2 and the capacitor 3 can also be set according to actual usage requirements, and can be fully potted or partially potted.

[0065] Specifically, the housing 1 is provided with a first baffle 11, and the high-voltage input connector 4 and the filter 2 are located on both sides of the first baffle 11. By providing the first baffle 11, it is ensured that the potting compound will not seep into the high-voltage connector and affect its sealing and electrical contact performance.

[0066] More specifically, the housing 1 is provided with a second barrier 12, which surrounds the outer perimeter of the second circuit board 7. The second barrier 12, which is 360° fully enclosed on the side of the second circuit board 7 away from the first circuit board 6, can isolate crosstalk signals introduced from the outside through the low-voltage signal connector 71 within the enclosed space formed by the second circuit board 7 and the housing 1, thereby reducing their signal interference to the power module 5 and the first circuit board 6.

[0067] In embodiments of this disclosure, the first barrier 11 extends between the filter 2 and the capacitor 3, thereby reducing signal interference from the high-voltage input circuit to the capacitor 3.

[0068] Specifically, the inverter also includes a power module 5, which is mounted on the first circuit board 6 and electrically connected to the capacitor 3. The first circuit board 6 integrates a control circuit and a drive circuit for the power module 5 and is electrically connected to the power module 5.

[0069] In the embodiments of this disclosure, the first circuit board 6 integrates the control circuit and the drive circuit of the power module 5, eliminating the inter-board connection structure and parts between the control board and the drive board, further simplifying the overall structure, reducing the number of parts, lowering the manufacturing cost, and reducing the size.

[0070] Specifically, the first circuit board 6 is provided with a first connector 61, and the second circuit board 7 is provided with a second connector 72. The first circuit board 6 and the second circuit board 7 are communicatively connected through the interlocking first connector 61 and second connector 72. The first circuit board 6 and the second circuit board 7 are communicatively connected through a male-female B2B connector, which further improves the compactness of the electronic control structure design and reduces the size and weight of the electronic control system.

[0071] In the embodiments disclosed herein, the first connector 61 is a male connector, the second connector 72 is a female connector, the first circuit board 6 and the second circuit board 7 are parallel to each other and spaced apart, and both are perpendicular to the thickness direction of the inverter. The first connector 61 and the second connector 72 are located between the first circuit board 6 and the second circuit board 7, and the insertion direction of the first connector 61 and the second connector 72 is parallel to the thickness direction of the inverter.

[0072] In other embodiments, the first connector 61 may be a female connector and the second connector 72 may be a male connector. The insertion direction of the first connector 61 and the second connector 72 may also be set to any other angle with the thickness direction of the inverter, depending on the design requirements.

[0073] Specifically, the housing 1 is provided with a third baffle 13, and the second circuit board 7 integrates a low-voltage signal connector 71. The low-voltage signal connector 71 and the second connector 72 are located on both sides of the third baffle 13. This arrangement reduces the interference of external interference signals to the B2B connector through the low-voltage signal connector 71.

[0074] In the embodiments of this disclosure, a low-voltage signal connector 71 that mates with the vehicle interface is integrated on the second circuit board 7, and the second circuit board 7 is located between the housing 1 and the first circuit board 6, which facilitates the connection and assembly of the low-voltage signal connector 71 with other components.

[0075] More specifically, the second circuit board 7 integrates a port filter circuit, which is used to filter low-voltage signals.

[0076] In embodiments of this disclosure, the port filter circuit is disposed adjacent to the low-voltage signal connector 71, thereby making the low-voltage signal filtering design more targeted.

[0077] Specifically, the housing 1 is provided with a fourth baffle 14, and the control circuit and the drive circuit of the power module 5 are located on both sides of the fourth baffle 14. The fourth baffle 14 separates and isolates the control circuit of the first circuit board 6 from the drive circuit of the power module 5.

[0078] More specifically, in the thickness direction of the inverter, the control circuit is directly opposite the second circuit board 7. This arrangement facilitates the placement of the fourth retaining wall 14, thereby enabling more reliable compartmentalization and isolation between the control circuit and the drive circuit of the power module 5.

[0079] In the embodiments of this disclosure, as shown in FIG4, the control circuit is directly above the second circuit board 7 in the thickness direction of the inverter. Due to the arrangement design, the third baffle 13 can be a part of the second baffle 12. By setting the first baffle 11, the second baffle 12, the third baffle 13 and the fourth baffle 14 on the housing 1, the vehicle's EMC (Electromagnetic Compatibility) requirements can be met by simply optimizing the design of the housing structure's compartment baffles without introducing or adding additional shielding covers or other parts.

[0080] Specifically, each of the three phase arms of the power module 5 is equipped with a first input copper busbar 51. The connection surface of the first input copper busbar 51 is parallel to the thickness direction of the inverter. The capacitor 3 has a first output copper busbar 31. The connection surface of the first output copper busbar 31 is parallel to the thickness direction of the inverter. The connection surfaces of the first output copper busbar 31 and the first input copper busbar 51 abut against each other and are welded together. This arrangement reduces the distance between the first output copper busbar 31 and the first input copper busbar 51, thereby significantly reducing the parasitic inductance of the connection circuit system.

[0081] More specifically, each of the three phase arms of the power module 5 is equipped with a second input copper busbar 52. The connection surface of the second input copper busbar 52 is perpendicular to the thickness direction of the inverter. The capacitor 3 has a second output copper busbar 32, the connection surface of which is parallel to the thickness direction of the inverter. The second output copper busbar 32 and the second input copper busbar 52 are connected by a connecting copper busbar 8. One connection surface of the connecting copper busbar 8 abuts against and is welded to the connection surface of the second output copper busbar 32, and the other connection surface of the connecting copper busbar 8 abuts against and is welded to the connection surface of the second input copper busbar 52. This arrangement reduces the distance between the second output copper busbar 32 and the second input copper busbar 52, thereby significantly reducing the parasitic inductance of the connection circuit system.

[0082] In the embodiments disclosed herein, the first input copper busbar 51 and the second input copper busbar 52 of the power module 5 are customized with laser-welded interfaces. The first input copper busbar 51 and the second input copper busbar 52 are positive and negative copper busbars, respectively, and are arranged at 90° to each other. Each of the three-phase bridge arms of the power module 5 has a set of first input copper busbar 51 and second input copper busbar 52. The first output copper busbar 31 and the second output copper busbar 32 of the capacitor 3 are positive and negative copper busbars, respectively, and are arranged along the thickness direction of the inverter. They are parallel to the first input copper busbar 51 of the power module 5 and have a certain gap between them. The power module 5 is arranged along the thickness direction of the inverter. After installation in the specified direction, the first output copper busbar 31 is pressed onto the first input copper busbar 51 in the direction perpendicular to the thickness of the inverter and then laser-welded. The laser-welded seam occupies almost no space perpendicular to the thickness of the inverter, thus ensuring a sufficiently close distance between the adapter copper busbar 8 and both the first input copper busbar 51 and the first output copper busbar 31, significantly reducing the parasitic inductance of the connection circuit system. Similarly, after the first output copper busbar 31 and the first input copper busbar 51 are welded, the adapter copper busbar 8 is assembled along the thickness of the inverter, and laser-welded from both the thickness direction of the inverter and the direction perpendicular to the thickness of the inverter. This structure achieves a fully stacked copper busbar connection structure and scheme from the output of capacitor 3 to the input side of power module 5. Compared to traditional screw-connection schemes, the parasitic inductance of the power module 5 input side electrical connection path system in this embodiment is expected to be reduced by more than 60%, greatly improving the efficiency of dual-electric control drive and power generation, increasing battery range, reducing range extender fuel consumption, and effectively enhancing product competitiveness.

[0083] Specifically, the housing 1 is provided with a water pipe fixing part 15 and / or a first wiring harness fixing part 16, so as to facilitate the fixing of the vehicle's water pipes and wiring harnesses.

[0084] In the embodiments disclosed herein, the housing 1 is provided with a water pipe fixing part 15 and a first wire harness fixing part 16, and the water pipe fixing part 15 and the first wire harness fixing part 16 are boss structures.

[0085] Specifically, the inverter also includes an outer casing 9, which covers the outside of the filter 2 and the capacitor 3 and is connected to the housing 1. Part of the high-voltage input connector 4 is located outside the outer casing 9, and part of the high-voltage input connector 4 extends into the outer casing 9. By providing the outer casing 9, the filter 2 and the capacitor 3 can be effectively protected.

[0086] More specifically, the outer casing 9 is provided with an air filter fixing part 91 and / or a second wiring harness fixing part 92, thereby facilitating the fixing of the vehicle air filter and the vehicle wiring harness.

[0087] In the embodiments of this disclosure, the outer casing 9 is provided with an air filter fixing part 91 and a second wire harness fixing part 92, and the air filter fixing part 91 and the second wire harness fixing part 92 are boss structures.

[0088] In the embodiments disclosed herein, filter 2, capacitor 3, and high-voltage input connector 4 are mounted on one side of housing 1, and first circuit board 6 and second circuit board 7 are mounted on the other side of housing 1. Water pipe fixing part 15, first wiring harness fixing part 16, air filter fixing part 91, and second wiring harness fixing part 92 are located on the same side of housing 1, and connection holes are respectively provided on them. Fasteners installed in the connection holes are used to fix the corresponding parts of the vehicle. For the vehicle parts, no other auxiliary fixing parts are needed to fix the relevant parts, making the layout of the vehicle parts more flexible and the integration higher. The number of auxiliary fixing parts of the vehicle is reduced and the volume occupied is smaller, thereby reducing costs, increasing the usable space of the passenger compartment, and improving the competitiveness of the product.

[0089] This disclosure also provides an electric drive assembly in the embodiments, including the inverter described above.

[0090] This disclosure also provides a vehicle in the embodiments, including the inverter or the electric drive assembly described above.

[0091] Specifically, the vehicle also includes a vehicle body, an inverter installed on the vehicle body, a vehicle water pipe fixed to a water pipe fixing part 15, a vehicle wiring harness fixed to a first wiring harness fixing part 16 and a second wiring harness fixing part 92, and a vehicle air filter fixed to an air filter fixing part 91.

[0092] According to the embodiments of this disclosure, in the inverter of a vehicle, by stacking the first circuit board 6 and the second circuit board 7 in the thickness direction of the inverter, the space in the thickness direction of the inverter is utilized more efficiently, thereby simplifying the overall structure, reducing the number of parts, lowering the manufacturing cost, and reducing the volume.

[0093] Obviously, the above embodiments of this disclosure are merely examples for clear illustration and are not intended to limit the implementation of this disclosure. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of the claims of this disclosure.

Claims

1. An inverter, characterized in that, include: Shell (1); A first circuit board (6) is mounted on the housing (1); The second circuit board (7) is connected to the first circuit board (6) and is stacked in the thickness direction of the inverter.

2. The inverter according to claim 1, characterized in that, The inverter also includes: The filter (2) is mounted on the housing (1) using potting compound; A capacitor (3) is electrically connected to the filter (2) and is mounted on the housing (1) by potting compound; A high-voltage input connector (4) is electrically connected to the filter (2) and mounted on the housing (1).

3. The inverter according to claim 2, characterized in that, The copper busbars connecting the filter (2) and the capacitor (3) are connected by welding.

4. The inverter according to claim 2, characterized in that, The electrical connection between the filter (2) and the capacitor (3) is encapsulated by potting.

5. The inverter according to claim 2, characterized in that, Part of the structure of the filter (2) is encapsulated with potting compound and / or the capacitor (3) is fully encapsulated with potting compound.

6. The inverter according to any one of claims 2 to 5, characterized in that, The housing (1) is provided with a first baffle (11), and the high-voltage input connector (4) and the filter (2) are located on both sides of the first baffle (11); and / or The housing (1) is provided with a second baffle (12), which surrounds the outer periphery of the second circuit board (7).

7. The inverter according to any one of claims 2 to 6, characterized in that, The inverter also includes a power module (5), which is electrically connected to the capacitor (3). The first circuit board (6) integrates a control circuit and a drive circuit for the power module (5) and is electrically connected to the power module (5).

8. The inverter according to any one of claims 1 to 7, characterized in that, The first circuit board (6) is provided with a first connector (61), and the second circuit board (7) is provided with a second connector (72). The first circuit board (6) and the second circuit board (7) are connected in communication through the first connector (61) and the second connector (72) that are plugged into each other.

9. The inverter according to claim 8, characterized in that, The housing (1) is provided with a third barrier (13), and the second circuit board (7) integrates a low-voltage signal connector (71). The low-voltage signal connector (71) and the second connector (72) are located on both sides of the third barrier (13).

10. The inverter according to any one of claims 1 to 9, characterized in that, The second circuit board (7) integrates a port filter circuit, which is used to filter low-voltage signals.

11. The inverter according to claim 7, characterized in that, The housing (1) is provided with a fourth barrier wall (14), and the control circuit and the drive circuit of the power module (5) are located on both sides of the fourth barrier wall (14).

12. The inverter according to claim 7, characterized in that, In the thickness direction of the inverter, the control circuit is directly opposite the second circuit board (7).

13. The inverter according to claim 7, characterized in that, The three-phase bridge arms of the power module (5) are each provided with a first input copper busbar (51), the connection surface of the first input copper busbar (51) is parallel to the thickness direction of the inverter, and the capacitor (3) has a first output copper busbar (31), the connection surface of the first output copper busbar (31) is parallel to the thickness direction of the inverter. The connecting surface of the first output copper busbar (31) and the connecting surface of the first input copper busbar (51) abut against each other and are welded together.

14. The inverter according to claim 13, characterized in that, The three-phase bridge arms of the power module (5) are each provided with a second input copper busbar (52), the connection surface of the second input copper busbar (52) is perpendicular to the thickness direction of the inverter, and the capacitor (3) has a second output copper busbar (32), the connection surface of the second output copper busbar (32) is parallel to the thickness direction of the inverter; The second output copper busbar (32) and the second input copper busbar (52) are connected by a transition copper busbar (8). One connecting surface of the transition copper busbar (8) abuts against and is welded to the connecting surface of the second output copper busbar (32), and the other connecting surface of the transition copper busbar (8) abuts against and is welded to the connecting surface of the second input copper busbar (52).

15. The inverter according to any one of claims 1 to 14, characterized in that, The housing (1) is provided with a water pipe fixing part (15) and / or a first wire harness fixing part (16).

16. The inverter according to any one of claims 2 to 7, characterized in that, It also includes an outer casing (9), which covers the outside of the filter (2) and the capacitor (3) and is connected to the housing (1). Part of the high voltage input connector (4) is located outside the outer casing (9), and part of the high voltage input connector (4) extends into the outer casing (9).

17. The inverter according to claim 16, characterized in that, The outer casing (9) is provided with an air filter fixing part (91) and / or a second wire harness fixing part (92).

18. An electric drive assembly, characterized in that, Including the inverter according to any one of claims 1 to 17.

19. A vehicle, characterized in that, Including the inverter according to any one of claims 1 to 17 or the electric drive assembly according to claim 18.

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