Inverters, motor controllers, powertrains, and vehicles

Abstract

An inverter, a motor controller, a power assembly and a vehicle, the inverter is used for the motor controller, comprising a box, a capacitor core, a power module and a glue joint, the glue joint is wrapped around the outer periphery of the capacitor core and the power module, the box is surrounded around the outer periphery of the glue joint, the application reduces the volume of the inverter.

Description

Technical Field

[0001] This application relates to the field of electronic and electrical technology, specifically to an inverter, a motor controller, a powertrain, and a vehicle. Background Technology

[0002] Inverters convert direct current (DC) to alternating current (AC) and are widely used in vehicles as core components for driving motors or charging systems. In related technologies, inverters include a bus capacitor and a power module, which are separately manufactured as two modules. The bus capacitor is individually packaged, while the power module includes a power module and a heat sink. The power module contains multiple power transistors, which are generally individually packaged, but sometimes two power transistors forming a single-phase bridge arm are jointly packaged. Thus, the power module consists of multiple independently packaged power transistors or multiple components composed of two power transistors jointly packaged. The power module is generally positioned between two heat sinks. Both the bus capacitor and the power module are fixed to the inverter housing with screws, resulting in screw mounting positions on the capacitor casing of the bus capacitor or the mounting blocks of the power module, increasing the inverter's size. Summary of the Invention

[0003] The purpose of this application is to provide an inverter, a motor controller, a powertrain, and a vehicle that solves the problem of large inverter size.

[0004] To achieve the objectives of this application, the following technical solution is provided:

[0005] In a first aspect, this application provides an inverter, including a housing, a capacitor core, a power module, and an adhesive component, wherein the adhesive component covers the outer periphery of the capacitor core and the power module, and the housing surrounds the outer periphery of the adhesive component.

[0006] In one embodiment, the inverter further includes a drive board, and the adhesive component also covers the outer periphery of the drive board.

[0007] In one embodiment, the power module includes a first power transistor and a second power transistor, which are spaced apart in a first direction; the first power transistor includes a first signal terminal extending in a direction away from the second power transistor, and the second power transistor includes a second signal terminal extending in a direction away from the first power transistor.

[0008] The driver board includes a first sub-driver board and a second sub-driver board. The first sub-driver board is disposed on the side of the first power transistor away from the second power transistor in the first direction and is connected to the first signal terminal. The second sub-driver board is disposed on the side of the second power transistor away from the first power transistor in the first direction and is connected to the second signal terminal.

[0009] In one embodiment, the power module includes a first power transistor and a second power transistor, which are stacked at intervals in a first direction and are electrically connected.

[0010] In one embodiment, the power module further includes a first heat sink, which is disposed between the first power transistor and the second power transistor. The first heat sink includes a first side and a second side facing away from each other, with the first power transistor disposed on the first side and the second power transistor disposed on the second side.

[0011] In one embodiment, the axis of the capacitor core is parallel to the first heat sink. The first power transistor includes a first body, and the second power transistor includes a second body. The first power transistor includes a first DC terminal connected to the first body, and the second power transistor includes a second DC terminal connected to the second body. The capacitor core includes a first end and a second end in the axial direction. The first end is connected to a first connecting piece, and the second end is connected to a second connecting piece. The second connecting piece extends to a position close to the first end. The first DC terminal is connected to the first connecting piece, and the second DC terminal is connected to the second connecting piece.

[0012] In one embodiment, the first DC terminal and the second DC terminal are at least partially stacked along a second direction, which intersects the first direction.

[0013] In one embodiment, the first DC terminal includes a first DC connection portion, one end of which is connected to the first body, and the other end extends toward and is connected to the first connecting piece; the second DC terminal includes a second DC connection portion, one end of which is connected to the second body, and the other end extends toward and is connected to the second connecting piece.

[0014] In one embodiment, there are multiple first power transistors arranged side-by-side along a third direction; there are also multiple second power transistors arranged side-by-side along the third direction, with each first power transistor and one second power transistor corresponding one-to-one in the first direction, and the third direction intersecting the first direction.

[0015] In one embodiment, the power module further includes a second heat sink and a third heat sink, wherein the second heat sink is disposed between the first sub-drive board and the first power transistor, and the third heat sink is disposed between the second power transistor and the second sub-drive board.

[0016] In one embodiment, the third heat sink includes an inlet pipe and an outlet pipe. The axis of the inlet pipe is approximately perpendicular to the third heat sink, and the axis of the outlet pipe is approximately perpendicular to the third heat sink. The inlet pipe is used to allow coolant to flow in, and the outlet pipe is used to allow coolant to flow out.

[0017] In one embodiment, the second sub-drive board has a first through hole and a second through hole, the liquid inlet pipe passes through the first through hole, and the liquid outlet pipe passes through the second through hole.

[0018] In one embodiment, the first sub-driver board and the second sub-driver board are connected by at least one connector.

[0019] In one embodiment, the inverter has a dimension L1 in a first direction and a dimension L2 in a third direction, satisfying: 0.9 ≤ L1 / L2 ≤ 1.1, and the first direction intersects with the third direction.

[0020] In one embodiment, the inverter further includes a capacitor housing, the capacitor core is encapsulated in the capacitor housing to form a capacitor module, and the capacitor module and the power module are disposed in the housing by the adhesive component.

[0021] In one embodiment, the inverter further includes a connecting plate adapted to connect the stator winding of a motor. The connecting plate includes a first section and a second section. The first section is connected to the electrical connection portion corresponding to the first power transistor and the second power transistor. The second section extends out of the housing in a direction parallel to the axial direction of the capacitor core.

[0022] In one embodiment, the adhesive component further covers the portion of the connecting plate located within the housing.

[0023] In one embodiment, the ends of the first connecting piece and the second connecting piece away from the power module extend out of the housing in a direction perpendicular to the axial direction of the capacitor core.

[0024] Secondly, this application also provides a motor controller, including at least two inverters as described in the first aspect and a control board, wherein the at least two inverters are connected to the control board, and the control board is disposed outside the enclosure.

[0025] Thirdly, this application also provides a powertrain including a motor controller as described in the second aspect.

[0026] Fourthly, this application also provides a vehicle including the powertrain described in the third aspect.

[0027] By setting up a housing, capacitor cores, power modules, and adhesive components, with the adhesive components covering the outer periphery of the capacitor cores and power modules, and the housing surrounding the outer periphery of the adhesive components, the capacitor cores and power modules are encapsulated together, saving on fixing and mounting components for capacitors and power modules and reducing the size of the inverter. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is an exploded view of an inverter according to one embodiment;

[0030] Figure 2 This is a first assembly drawing of an inverter according to one embodiment;

[0031] Figure 3 This is a second assembly drawing of an inverter according to one embodiment;

[0032] Figure 4 This is a third assembly drawing of an inverter according to one embodiment;

[0033] Figure 5 This is a fourth assembly drawing of an inverter according to one embodiment;

[0034] Figure 6 This is a schematic diagram of the inverter structure after potting, according to one embodiment.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10-Inverter, 11-Power Module, 12-First Power Transistor, 121-First Signal Terminal, 122-First Body, 123-First AC Terminal, 1231-First Connection Part, 124-First DC Terminal, 1241-First DC Connection Part, 13-Second Power Transistor, 131-Second Signal Terminal, 132-Second Body, 133-Second AC Terminal, 1331-Second Connection Part, 134-Second DC Terminal, 1341- Second DC connection part, 14-first sub-drive board, 15-second sub-drive board, 16-second heat sink, 17-first heat sink, 18-third heat sink, 19-capacitor core, 20-inlet pipe, 21-outlet pipe, 22-box, 23-accommodating cavity, 24-first connecting piece, 25-second connecting piece, 26-connecting plate, 261-first detection slot, 262-second detection slot, X-first direction, Z-second direction, Y-third direction. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] This application provides an inverter 10, please refer to... Figure 1 , Figure 2 and Figure 3 It includes a housing 22, a capacitor core 19, and a power module 11.

[0042] An adhesive component covers the outer periphery of the capacitor core 19 and the power module 11, and a housing 22 surrounds the outer periphery of the adhesive component. Optionally, the adhesive component is a liquid adhesive, and the material of the adhesive component can be epoxy resin.

[0043] By setting up a housing 22, a capacitor core 19, a power module 11, and an adhesive component, with the adhesive component covering the outer periphery of the capacitor core 19 and the power module 11, and the housing 22 surrounding the outer periphery of the adhesive component, the capacitor core 19 and the power module 11 are encapsulated together, saving the need for fixing and mounting components for the capacitor core 19 and the power module 11, and reducing the size of the inverter 10.

[0044] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The inverter 10 also includes a drive board, and adhesive parts are also wrapped around the outer periphery of the drive board.

[0045] Optionally, the adhesive not only serves to fix the drive board, but also insulates the drive board from other parts of the inverter 10.

[0046] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 11 includes a first power transistor 12 and a second power transistor 13, which are spaced apart in a first direction X. The first power transistor 12 includes a first signal terminal 121 extending away from the second power transistor 13, and the second power transistor 13 includes a second signal terminal 131 extending away from the first power transistor 12. Optionally, there can be multiple first signal terminals 121 and multiple second signal terminals 131. Optionally, the multiple first signal terminals 121 are spaced apart in a third direction Y, and the multiple second signal terminals 131 are spaced apart in a third direction Y. Optionally, each first signal terminal 121 and one second signal terminal 131 are arranged in a one-to-one correspondence in the first direction X.

[0047] The driver board includes a first sub-driver board 14 and a second sub-driver board 15. The first sub-driver board 14 is disposed on the side of the first power transistor 12 away from the second power transistor 13 in the first direction X, and is connected to the first signal terminal 121. Optionally, the shape of the first sub-driver board 14 is one of polygonal, circular, elliptical, and irregular shapes. The shape of the first sub-driver board 14 may specifically be, but is not limited to, quadrilateral, pentagonal, hexagonal, octagonal, circular, and elliptical shapes.

[0048] The second sub-driver board 15 is disposed on the side of the second power transistor 13 away from the first power transistor 12 in the first direction X, and is connected to the second signal terminal 131. Optionally, the shape of the second sub-driver board 15 is one of polygonal, circular, elliptical, and irregular shapes. The shape of the second sub-driver board 15 may be, but is not limited to, quadrilateral, pentagonal, hexagonal, octagonal, circular, and elliptical shapes.

[0049] Optionally, the first sub-drive board 14 is provided with a first row of pins, which are electrically connected to the second sub-drive board 15 to transmit signals or current. Optionally, the second sub-drive board 15 is provided with a second row of pins, which are electrically connected to other external components to transmit signals or current.

[0050] Specifically, in the prior art, there is one driver board. In this application, the driver board is divided into a first sub-driver board 14 and a second sub-driver board 15, thereby reducing the area of ​​a single driver board and ensuring that the size of the first sub-driver board 14 and the second sub-driver board 15 does not exceed the boundary of the entire module.

[0051] During the assembly of the inverter 10, this application connects a power module 11 between the first sub-drive board 14 and the second sub-drive board 15, which improves the flexibility of the drive board layout.

[0052] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 11 includes a first power transistor 12 and a second power transistor 13. The first power transistor 12 and the second power transistor 13 are stacked at intervals in a first direction X, and the first power transistor 12 and the second power transistor 13 are electrically connected.

[0053] The first power transistor 12 and the second power transistor 13, which are electrically connected, form a phase bridge arm. The electrical connection between them is the AC terminal of this phase bridge arm, used to connect to the stator winding of the motor. The first power transistor 12 and the second power transistor 13 are stacked at intervals. When the first power transistor 12 is turned on, the second power transistor 13 connected to the first power transistor 12 is reverse biased, thereby generating a recovery current in the second power transistor 13 that is opposite to the current inside the first power transistor 12. The reverse recovery current cancels out the magnetic field generated by the current inside the first power transistor 12, thus reducing the stray inductance in the power module 11 circuit and improving the electromagnetic compatibility of the power module 11.

[0054] Optionally, the above-mentioned arrangement of the first power transistor 12 and the second power transistor 13 saves space in the inverter 10 and improves the compactness of the inverter 10 components compared to the solution of laying out the power transistors.

[0055] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The power module 11 also includes a first heat sink 17, which is disposed between the first power transistor 12 and the second power transistor 13. The first heat sink 17 includes a first side and a second side facing away from each other. The first power transistor 12 is disposed on the first side and the second power transistor 13 is disposed on the second side.

[0056] Optionally, the first surface faces the first sub-drive board 14. Specifically, the first heat sink 17 improves the heat dissipation capacity of the inverter 10.

[0057] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The axis of capacitor core 19 is parallel to the first heat sink 17. The first power transistor 12 includes a first body 122, and the second power transistor 13 includes a second body 132. The first power transistor 12 includes a first DC terminal 124 connected to the first body 122, and the second power transistor 13 includes a second DC terminal 134 connected to the second body 132. The capacitor core 19 includes a first end and a second end in the axial direction. The first end is connected to a first connecting piece 24, and the second end is connected to a second connecting piece 25. The second connecting piece 25 extends to a position close to the first end. The first DC terminal 124 and the first connecting piece 24 are connected, and the second DC terminal 134 and the second connecting piece 25 are connected.

[0058] Optionally, the first sub-driving board 14 is disposed between the capacitor core 19 and the first heat sink 17. The first heat sink 17, the first sub-driving board 14 and the capacitor core 19 together form a first connecting surface on one side in the third direction Y, and the first heat sink 17, the first sub-driving board 14 and the capacitor core 19 together form a second connecting surface on one side in the second direction Z.

[0059] Optionally, the first heat sink 17 has a first mating groove at one end along the second direction Z, and the surface of the bottom wall of the first mating groove is recessed relative to the first connecting surface. Optionally, the first heat sink 17 has a second mating groove at the other end along the second direction Z, and the structure of the fourth mating groove is the same as that of the first mating groove.

[0060] In one embodiment, the first DC terminal 124 and the second DC terminal 134 are at least partially stacked along the second direction Z, which intersects the first direction X. Optionally, the second direction Z is perpendicular to the first direction X.

[0061] Specifically, the above-mentioned arrangement of the first DC terminal 124 and the second DC terminal 134 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0062] Optional, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The first power transistor 12 includes a first body 122, which is connected to a first signal terminal 121. The second power transistor 13 includes a second body 132, which is connected to a second signal terminal 131. The first body 122 and the second body 132 are stacked in the first direction X.

[0063] Optionally, there may be multiple first bodies 122 and multiple second bodies 132. Optionally, there may be multiple first signal terminals 121 and multiple second signal terminals 131. Optionally, each first body 122 and each second body 132 may be configured in a one-to-one correspondence. Optionally, each first body 122 may include a first chip, and each second body 132 may include a second chip. The types of the first and second chips are not limited in this application.

[0064] Optionally, multiple first signal terminals 121 are spaced apart. Optionally, multiple second signal terminals 131 are spaced apart. Optionally, multiple first signal terminals 121 are located at opposite ends of the first body 122 along the second direction Z. Optionally, multiple second signal terminals 131 are located at opposite ends of the second body 132 along the second direction Z.

[0065] Specifically, the above-mentioned arrangement of the first body 122 and the second body 132 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0066] Optional, please refer to Figure 1 , Figure 2 and Figure 3 The first power transistor 12 includes a first body 122, which is connected to a first signal terminal 121. The second power transistor 13 includes a second body 132, which is connected to a second signal terminal 131. The first body 122 and the second body 132 are stacked in the first direction X.

[0067] Optionally, the first body 122 and the first signal terminal 121 can transmit signals, and the second body 132 and the second signal terminal 131 can transmit signals.

[0068] Specifically, the first body 122 and the second body 132 are stacked in the first direction X, saving space for the inverter 10.

[0069] Optional, please refer to Figure 1 , Figure 2 and Figure 3 The first AC terminal 123 includes a first connecting part 1231, one end of which is connected to the first body 122, and the other end extends toward the second power tube 13;

[0070] The second AC terminal 133 includes a second connection portion 1331, one end of which is connected to the second body, and the other end extends toward the first power transistor 12 and is connected to the first connection portion 1231.

[0071] Optionally, the first AC terminal 123 and the second AC terminal 133 are located on the same side in the second direction Z. Specifically, the first AC terminal 123 and the second AC terminal 133 provide the inverter 10 with a circuit for converting DC to AC power.

[0072] Optionally, there may be multiple first AC terminals 123 and multiple second AC terminals 133. Optionally, the first connecting portion 1231 may be bent. Optionally, the second connecting portion 1331 may be bent. Optionally, the first connecting portion 1231 may be L-shaped. Optionally, the second connecting portion 1331 may be L-shaped.

[0073] Specifically, the above-mentioned arrangement of the first connection part 1231 and the second connection part 1331 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0074] Optional, please refer to Figure 1 , Figure 2 and Figure 3 The first connecting part 1231 and the second connecting part 1331 are stacked and connected along the second direction Z, and the second direction Z intersects with the first direction X.

[0075] Optionally, there are multiple first connecting portions 1231 and multiple second connecting portions 1331. Optionally, each first connecting portion 1231 and each second connecting portion 1331 are stacked in a one-to-one correspondence along the second direction Z. Optionally, the first connecting portions 1231 and the second connecting portions 1331 are stacked in a two-way direction Z and are electrically connected.

[0076] Specifically, the above-mentioned arrangement of the first connection part 1231 and the second connection part 1331 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0077] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3The first DC terminal 124 includes a first DC connection portion 1241, one end of which is connected to the first body 122, and the other end extends toward and is connected to the first connecting piece 24; the second DC terminal 134 includes a second DC connection portion 1341, one end of which is connected to the second body 132, and the other end extends toward and is connected to the second connecting piece 25.

[0078] Optionally, current can be transmitted between the first DC connection portion 1241 and the first body 122, and current can be transmitted between the second DC connection portion 1341 and the second body 132.

[0079] Optionally, there may be multiple first power transistors 12 and multiple second power transistors 13. Optionally, there may be multiple first bodies 122 and multiple second bodies 132.

[0080] Optionally, the second side is opposite to the first side along the second direction Z of the inverter 10.

[0081] Specifically, the first DC terminal 124 and the second DC terminal 134 provide the inverter 10 with a circuit for converting DC power to AC power.

[0082] Optionally, there may be multiple first DC terminals 124 and multiple second DC terminals 134.

[0083] Optionally, the first DC connection portion 1241 is bent. Optionally, the second DC connection portion 1341 is bent. Optionally, the first DC connection portion 1241 is L-shaped. Optionally, the second DC connection portion 1341 is L-shaped. Optionally, the connecting piece includes a plurality of first connecting pieces 24 and a plurality of second connecting pieces 25, both the first connecting pieces 24 and the second connecting pieces 25 are connected to the capacitor core 19, the first connecting pieces 24 are connected to the first DC connection portion 1241, and the second connecting pieces 25 are connected to the second DC connection portion 1341.

[0084] Optionally, there may be multiple first DC connection parts 1241 and multiple second DC connection parts 1341.

[0085] Optionally, the first DC connection portion 1241 and the second DC connection portion 1341 are arranged at intervals along the first direction X. Optionally, the first DC connection portion 1241 and the second DC connection portion 1341 are arranged at equal intervals along the first direction X.

[0086] Optionally, the above-described arrangement of the first DC connection part 1241 and the second DC connection part 1341 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0087] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 There are multiple first power transistors 12, which are arranged side by side along the third direction Y; there are multiple second power transistors 13, which are arranged side by side along the third direction Y, and each first power transistor 12 and one second power transistor 13 are arranged in a one-to-one correspondence in the first direction X, where the third direction Y intersects with the first direction X.

[0088] Optionally, a plurality of first power transistors 12 are spaced apart along a third direction Y, and a plurality of second power transistors 13 are spaced apart along a third direction Y.

[0089] Optionally, a plurality of first power transistors 12 are arranged at equal intervals along the third direction Y, and a plurality of second power transistors 13 are arranged at equal intervals along the third direction Y.

[0090] Specifically, the arrangement of the first power transistor 12 and the second power transistor 13 makes their layout compact and orderly.

[0091] Optionally, the above arrangement of multiple first power transistors 12 and multiple second power transistors 13 saves space in the inverter 10 and improves the compactness of the inverter 10 components.

[0092] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The power module 11 also includes a second heat sink 16 and a third heat sink 18. The second heat sink 16 is disposed between the first sub-drive board 14 and the first power transistor 12, and the third heat sink 18 is disposed between the second power transistor 13 and the second sub-drive board 15.

[0093] Optionally, the second heat sink 16 and the third heat sink 18 improve the heat dissipation capacity of the inverter 10.

[0094] It should be noted that, in this application, optionally, the first power transistor 12 further includes a first package and a first body 122, the first package forming a first package cavity, and the first body 122 being packaged within the first package cavity;

[0095] The second power transistor 13 also includes a second package and a second body 132. The second package has a second encapsulation cavity, and the second body 132 is encapsulated in the second encapsulation cavity.

[0096] Optionally, the shape of the first encapsulation cavity is one of a polygon, a circle, an ellipse, and an irregular shape. The specific shape of the first encapsulation cavity may be, but is not limited to, quadrilateral, pentagonal, hexagonal, octagonal, circular, and elliptical. Optionally, the shape of the second encapsulation cavity is one of a polygon, a circle, an ellipse, and an irregular shape. The specific shape of the second encapsulation cavity may be, but is not limited to, quadrilateral, pentagonal, hexagonal, octagonal, circular, and elliptical.

[0097] Specifically, the aforementioned first and second encapsulation bodies improve the fixation level of the first body 122 and the second body 132.

[0098] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The third heat sink 18 includes an inlet pipe 20 and an outlet pipe 21. The axis of the inlet pipe 20 is approximately perpendicular to the third heat sink 18, and the axis of the outlet pipe 21 is approximately perpendicular to the third heat sink 18. The inlet pipe 20 is used to supply coolant inflow, and the outlet pipe 21 is used to supply coolant outflow.

[0099] Optionally, the axis of the inlet pipe 20 is perpendicular to the third heat sink 18, and the axis of the outlet pipe 21 is perpendicular to the third heat sink 18.

[0100] Specifically, the above-mentioned configuration of the inlet pipe 20 and outlet pipe 21 improves the heat dissipation capacity of the inverter 10.

[0101] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The second sub-drive plate 15 has a first through hole and a second through hole. The liquid inlet pipe 20 passes through the first through hole and the liquid outlet pipe 21 passes through the second through hole.

[0102] Optionally, the first through hole can be a polygonal hole, a circular hole, an elliptical hole, or an irregularly shaped hole. Optionally, the first through hole can specifically be, but is not limited to, a quadrilateral hole, a pentagonal hole, a hexagonal hole, an octagonal hole, a circular hole, or an elliptical hole.

[0103] Optionally, the second through hole can be a polygonal hole, a circular hole, an elliptical hole, or an irregularly shaped hole. Specifically, the second through hole can be, but is not limited to, a quadrilateral hole, a pentagonal hole, a hexagonal hole, an octagonal hole, a circular hole, or an elliptical hole.

[0104] Specifically, the above-mentioned arrangement of the first through hole and the second through hole improves the stability of fixing the liquid inlet pipe 20 and the liquid outlet pipe 21.

[0105] It should be noted that, in this application, optionally, the first heat sink 17 has a first heat exchange cavity, the second heat sink 16 has a second heat exchange cavity, and the third heat sink 18 has a third heat exchange cavity, and the first heat exchange cavity, the second heat exchange cavity and the third heat exchange cavity are interconnected.

[0106] Optionally, the first heat exchange chamber, the second heat exchange chamber, and the third heat exchange chamber are used for coolant flow. The direction of coolant flow in the first, second, and third heat exchange chambers is not limited.

[0107] Specifically, the above-mentioned design of the first heat exchange cavity, the second heat exchange cavity and the third heat exchange cavity improves the heat dissipation effect of the inverter 10.

[0108] In one embodiment, please refer to Figure 1 , Figure 2 and Figure 3 The first sub-drive board 14 and the second sub-drive board 15 are connected by at least one connector.

[0109] Optionally, the inclusion of at least one connector enhances the stability of the connection between the first sub-driver board 14 and the second sub-driver board 15.

[0110] It should be noted that, in this application, optionally, the first heat sink 17, the second heat sink 16, and the third heat sink 18 are connected and fixed.

[0111] Optionally, the inverter 10 also includes a plurality of threaded fasteners, which are spaced apart. The first heat sink 17 is provided with a first mounting hole, the second heat sink 16 is provided with a second mounting hole, and the third heat sink 18 is provided with a third mounting hole. The threaded fasteners pass through the first mounting hole, the second mounting hole, and the third mounting hole in sequence to connect the first heat sink 17, the second heat sink 16, and the third heat sink 18 to each other, so that the first heat sink 17, the second heat sink 16, and the third heat sink 18 are tightly connected to each other.

[0112] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 The inverter 10 has a dimension of L1 in the first direction X and a dimension of L2 in the third direction Y, satisfying: 0.9≤L1 / L2≤1.1, and the third direction Y intersects with the first direction X.

[0113] Optionally, the first direction X, the second direction Z, and the third direction Y are all perpendicular to each other.

[0114] Optionally, the result of L1 / L2 can be, but is not limited to, 0.9, 1.0, and 1.1. Optionally, when the result of L1 / L2 is 1.0, the size of the inverter 10 in the first direction X is the same as the size of the inverter 10 in the third direction Y.

[0115] Optionally, all components within the inverter 10 have the same dimensions in the second direction Z, which are essentially the same as the dimensions of the power module 11 in the second direction Z.

[0116] Optionally, the specific dimensions of the inverter 10 in the first direction X can be appropriately extended to adapt to the capacitance and voltage requirements of the capacitor core 19, thereby improving the adaptability of the inverter 10. Furthermore, this size design is suitable for complex assembly environments and is conducive to creating platform-based products.

[0117] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The inverter 10 also includes a capacitor housing, and the capacitor core 19 is encapsulated in the capacitor housing to form a capacitor module. The capacitor module and the power module 11 are mounted in the housing 22 by adhesive.

[0118] Optionally, the enclosure 22 is made of plastic, and the inverter 10 is fixed in the enclosure 22 by being potted with plastic.

[0119] Optionally, the cross-sectional shape of the box 22 can be polygonal, circular, elliptical, or irregular. Specifically, the cross-sectional shape of the box 22 can be, but is not limited to, quadrilateral, pentagonal, hexagonal, octagonal, circular, and elliptical.

[0120] Specifically, the height of all parts in the second direction Z inside the housing 22 is the same, and the dimensions of the other parts of the inverter 10 in the first direction X and the third direction Y are the same as those of the power module 11.

[0121] Specifically, the inverter 10 uses only a few threaded fasteners to secure parts during assembly, simplifying the installation process and reducing costs.

[0122] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The inverter 10 also includes a connecting plate 26, which is suitable for connecting the stator winding of the motor. The connecting plate 26 includes a first section and a second section. The first section is connected to the electrical connection part of the corresponding first power transistor 12 and second power transistor 13. The second section extends out of the housing in a direction parallel to the axial direction of the capacitor core.

[0123] Optionally, each connecting plate 26 is stacked and connected to a second AC terminal 133. Optionally, there are three connecting plates 26, each connected to a second AC terminal 133 in the second direction Z. Specifically, the above design of the connecting plates 26 saves space in the inverter 10. Each connecting plate 26 has a first detection slot 261 and a second detection slot 262 facing away from each other, and the first detection slot 261 and the second detection slot 262 are staggered. Optionally, each connecting plate 26 has a first detection slot 261 and a second detection slot 262 facing away from each other along the third direction Y, and the first detection slot 261 and the second detection slot 262 are staggered. Optionally, the first detection slot 261 can be a polygonal slot, a circular slot, an elliptical slot, or an irregularly shaped slot, etc. Optionally, the first detection slot 261 can specifically be, but is not limited to, a quadrilateral slot, a pentagonal slot, a hexagonal slot, an octagonal slot, a circular slot, and an elliptical slot, etc. Optionally, the second detection slot 262 can be a polygonal slot, a circular slot, an elliptical slot, or an irregularly shaped slot. Specifically, the second detection slot 262 can be, but is not limited to, a quadrilateral slot, a pentagonal slot, a hexagonal slot, an octagonal slot, a circular slot, or an elliptical slot. Specifically, the first detection slot 261 and the second detection slot 262 are used for coreless Hall effect chip current detection, improving the convenience of detection.

[0124] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The adhesive component also covers the portion of the connecting plate 26 located inside the housing 22.

[0125] Optionally, the adhesive component enhances the fixation and insulation of the connecting plate 26. Optionally, the housing 22 has a receiving cavity 23 that houses the adhesive component.

[0126] In one embodiment, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The first connecting piece 24 and the second connecting piece 25 extend from the end away from the power module in a direction perpendicular to the axial direction of the capacitor core 19 out of the housing 22.

[0127] Specifically, the different wiring methods of the connecting plate 26, the first connecting piece 24, and the second connecting piece 25 make it easier to install the battery pack and the motor. In addition, it makes the wires connecting the inverter 10, the battery pack, and the motor shorter and easier to arrange.

[0128] A motor controller includes at least two inverters 10 as described above and a control board, wherein the at least two inverters 10 are connected to the control board and the control board is disposed outside the housing 22.

[0129] A powertrain including a motor controller as described above.

[0130] This application also provides a vehicle including the powertrain as described above.

[0131] Optionally, the vehicle can be a private car or a commercial vehicle.

[0132] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship of the drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0133] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes in accordance with this application still fall within the scope of this application.

Claims

1. An inverter, characterized in that, It includes a housing, a capacitor core, a power module, and an adhesive component, wherein the adhesive component covers the outer periphery of the capacitor core and the power module, and the housing surrounds the outer periphery of the adhesive component; The inverter also includes a drive board, and the adhesive component is also covered on the outer periphery of the drive board; The power module includes a first power transistor and a second power transistor, which are spaced apart in a first direction; the first power transistor includes a first signal terminal that extends in a direction away from the second power transistor, and the second power transistor includes a second signal terminal that extends in a direction away from the first power transistor. The driver board includes a first sub-driver board and a second sub-driver board. The first sub-driver board is disposed on the side of the first power transistor away from the second power transistor in the first direction and is connected to the first signal terminal. The second sub-driver board is disposed on the side of the second power transistor away from the first power transistor in the first direction and is connected to the second signal terminal.

2. The inverter according to claim 1, characterized in that, The power module includes a first power transistor and a second power transistor, which are stacked at intervals in a first direction and are electrically connected.

3. The inverter according to claim 2, characterized in that, The power module further includes a first heat sink, which is disposed between the first power transistor and the second power transistor. The first heat sink includes a first side and a second side facing away from each other. The first power transistor is disposed on the first side, and the second power transistor is disposed on the second side.

4. The inverter according to claim 3, characterized in that, The axis of the capacitor core is parallel to the first heat sink. The first power transistor includes a first body, and the second power transistor includes a second body. The first power transistor includes a first DC terminal connected to the first body, and the second power transistor includes a second DC terminal connected to the second body. The capacitor core includes a first end and a second end in the axial direction. The first end is connected to a first connecting piece, and the second end is connected to a second connecting piece. The second connecting piece extends to a position close to the first end. The first DC terminal is connected to the first connecting piece, and the second DC terminal is connected to the second connecting piece.

5. The inverter according to claim 4, characterized in that, The first DC terminal and the second DC terminal are at least partially stacked along a second direction, which intersects with the first direction.

6. The inverter according to claim 4, characterized in that, The first DC terminal includes a first DC connection portion, one end of which is connected to the first body, and the other end extends toward and is connected to the first connecting piece; the second DC terminal includes a second DC connection portion, one end of which is connected to the second body, and the other end extends toward and is connected to the second connecting piece.

7. The inverter according to claim 1, characterized in that, The number of first power transistors is multiple, and the multiple first power transistors are arranged side by side along a third direction; the number of second power transistors is multiple, and the multiple second power transistors are arranged side by side along the third direction, and each first power transistor and one second power transistor are arranged in a one-to-one correspondence in the first direction, and the third direction intersects with the first direction.

8. The inverter according to claim 1, characterized in that, The power module further includes a second heat sink and a third heat sink, the second heat sink being disposed between the first sub-drive board and the first power transistor, and the third heat sink being disposed between the second power transistor and the second sub-drive board.

9. The inverter according to claim 8, characterized in that, The third heat sink includes an inlet pipe and an outlet pipe. The axis of the inlet pipe is approximately perpendicular to the third heat sink, and the axis of the outlet pipe is approximately perpendicular to the third heat sink. The inlet pipe is used to allow coolant to flow in, and the outlet pipe is used to allow coolant to flow out.

10. The inverter according to claim 9, characterized in that, The second sub-drive board has a first through hole and a second through hole, the liquid inlet pipe passes through the first through hole, and the liquid outlet pipe passes through the second through hole.

11. The inverter according to claim 1, characterized in that, The first sub-driver board and the second sub-driver board are connected by at least one connector.

12. The inverter according to any one of claims 1 to 11, characterized in that, The inverter has a dimension L1 in the first direction and a dimension L2 in the third direction, satisfying: 0.9≤L1 / L2≤1.1, and the first direction intersects with the third direction.

13. The inverter according to claim 1, characterized in that, The inverter also includes a capacitor housing, and the capacitor core is encapsulated in the capacitor housing to form a capacitor module. The capacitor module and the power module are disposed in the housing by the adhesive component.

14. The inverter according to claim 2, characterized in that, The inverter also includes a connecting plate adapted to connect the stator winding of the motor. The connecting plate includes a first section and a second section. The first section is connected to the electrical connection points of the corresponding first power transistor and the second power transistor. The second section extends out of the housing in a direction parallel to the axial direction of the capacitor core.

15. The inverter according to claim 14, characterized in that, The adhesive component also covers the portion of the connecting plate located inside the housing.

16. The inverter according to claim 6, characterized in that, The first connecting piece and the second connecting piece extend from the housing in a direction perpendicular to the axial direction of the capacitor core at their ends away from the power module.

17. A motor controller, characterized in that, It includes at least two inverters as described in any one of claims 1 to 16 and a control board, wherein at least two of the inverters are connected to the control board and the control board is disposed outside the enclosure.

18. A powertrain, characterized in that, Includes the motor controller as described in claim 17.

19. A vehicle, characterized in that, Including the powertrain as described in claim 18.

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