Inverter, motor controller, powertrain, and vehicle

Abstract

An inverter (10), a motor controller (40), a powertrain (50), and a vehicle (60). The inverter is applied to the motor controller. The inverter comprises power transistors (11) and capacitor cores (19), and each power transistor comprises a power transistor body (100) and a direct-current terminal (35) connected to the power transistor body; each capacitor core and the corresponding power transistor are arranged in a first direction, and the first direction is basically perpendicular to the power transistor body; the capacitor core comprises a core conductive piece (200); the core conductive piece comprises a connecting end (36); the connecting end is provided on an axial first end of the capacitor core; the direct-current terminal is adjacent to the axial first end of the capacitor core; the connecting end is connected to the direct-current terminal. The described arrangement reduces the size of the inverter.

Description

Inverters, motor controllers, powertrains and vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 29, 2023, with application number 202311867170.5 and application name “Inverter, motor controller, powertrain and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic and electrical technology, and in particular to an inverter, a motor controller, a powertrain, and a vehicle. Background Art

[0003] Inverters convert direct current (DC) to alternating current (AC). They serve as core components in drive motors and charging systems and are widely used in vehicles. In existing technologies, improper placement of capacitors and power transistors often results in irregularly shaped motor controller housings or large overall size.

[0004] Summary of the Invention

[0005] The purpose of this application is to provide an inverter, a motor controller, a powertrain and a vehicle to solve the problem of large inverter size.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] In a first aspect, the present application provides an inverter, comprising:

[0008] A power tube, the power tube comprising a power tube body and a DC terminal connected to the power tube body;

[0009] A capacitor core, wherein the capacitor core and the power tube are arranged in a first direction, wherein the first direction is substantially perpendicular to the power tube body, wherein the capacitor core comprises a core conductive sheet, wherein the core conductive sheet comprises a connecting end, wherein the connecting end is provided at the first axial end of the capacitor core, wherein the DC terminal is adjacent to the first axial end of the capacitor core, and wherein the connecting end is connected to the DC terminal.

[0010] In one embodiment, the inverter further includes a first heat sink, and in the first direction, the first heat sink is disposed between the capacitor core and the power tube body.

[0011] In one embodiment, the inverter further includes a first driving board, and in the first direction, the first driving board is disposed between the capacitor core and the first heat sink.

[0012] In one embodiment, the core conductive sheet includes a first conductive sheet and a second conductive sheet, the first conductive sheet has a first connecting end, the second conductive sheet has a second connecting end, and the first connecting end and the second connecting end are arranged near the axial first end of the capacitor core;

[0013] The first connection end and the second connection end are arranged on a first side surface of the capacitor core, and the first side surface is close to the power tube; the first connection end and the second connection end are stacked and spaced apart at the first axial end of the capacitor core; the DC terminal includes a first connection terminal and a second connection terminal, the first connection terminal is connected to the first connection end, and the second connection terminal is connected to the second connection end.

[0014] In one embodiment, the first conductive sheet further has a third connection end, and the second conductive sheet further has a fourth connection end. The third connection end and the fourth connection end are close to the second side surface of the capacitor core, and the second side surface is far away from the power tube.

[0015] In one embodiment, the power tube includes a first sub-power tube and a second sub-power tube, the power tube body includes a first sub-power tube body and a second sub-power tube body, the first sub-power tube includes the first sub-power tube body and the first connecting terminal, the second sub-power tube includes the second sub-power tube body and the second connecting terminal, and the first sub-power tube body and the second sub-power tube body are stacked at intervals in the first direction.

[0016] In one embodiment, the first sub-power tube further includes a first AC terminal, and the second sub-power tube further includes a second AC terminal. The first AC terminal and the second AC terminal are arranged near the second axial end of the capacitor core, and the first AC terminal and the second AC terminal are electrically connected.

[0017] In one embodiment, the first sub-power tube further includes a first signal end, the first signal end extending in a direction away from the second sub-power tube body, and the second sub-power tube further includes a second signal end, the second signal end extending in a direction away from the first sub-power tube body;

[0018] The inverter also includes a first drive board and a second drive board. The first drive board is arranged on a side of the first sub-power tube body away from the second sub-power tube body in the first direction and is connected to the first signal end. The second drive board is arranged on a side of the second sub-power tube body away from the first sub-power tube body in the first direction and is connected to the second signal end.

[0019] In one embodiment, the inverter further includes a second heat sink, which is disposed between the first sub-power tube body and the second sub-power tube body. The second heat sink includes a first surface and a second surface opposite to each other. The first sub-power tube body is disposed on the first surface, and the second sub-power tube body is disposed on the second surface.

[0020] The top of the second heat dissipation plate is close to the first axial end of the capacitor core, and the bottom of the second heat dissipation plate is close to the second axial end of the capacitor core.

[0021] In one embodiment, there are multiple first sub-power tubes, and the multiple first sub-power tubes are arranged in parallel along the second direction; there are multiple second sub-power tubes, and the multiple second sub-power tubes are arranged in parallel along the second direction, each first sub-power tube is electrically connected to one second sub-power tube in a one-to-one correspondence in the first direction, and the second direction intersects with the first direction.

[0022] In one embodiment, the inverter further includes a third heat sink, and the third heat sink is disposed between the second sub-power tube body and the second driving plate.

[0023] 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, the axis of the outlet pipe is approximately perpendicular to the third heat sink, the inlet pipe is used for supplying coolant to flow in, and the outlet pipe is used for supplying coolant to flow out.

[0024] In one embodiment, a first through hole and a second through hole are formed on the second driving plate, the liquid inlet pipe is passed through the first through hole, and the liquid outlet pipe is passed through the second through hole.

[0025] In one embodiment, the first driving board and the second driving board are connected via at least one connector.

[0026] In one embodiment, the inverter further includes a box, and the capacitor core and the power tube are jointly encapsulated in the box.

[0027] In one embodiment, the inverter further includes a box, a capacitor housing, and an adhesive member. The capacitor core is encapsulated in the capacitor housing to form a capacitor module. The capacitor module and the power tube are arranged in the box through the adhesive member.

[0028] In one embodiment, the size of the inverter in the first direction is L1, the size of the inverter in the second direction is L2, and the following condition is satisfied: 0.9≤L1 / L2≤1.1, and the second direction intersects the first direction.

[0029] In a second aspect, the present application further provides a motor controller comprising the inverter as described in the first aspect.

[0030] In a third aspect, the present application also provides a powertrain, comprising a motor controller as described in the second aspect.

[0031] In a fourth aspect, the present application also provides a vehicle comprising the powertrain as described in the third aspect.

[0032] By arranging a power tube and a capacitor core, the power tube includes a power tube body and a DC terminal connected to the power tube body. The capacitor core and the power tube are arranged in a first direction, which is basically perpendicular to the power tube body, equivalent to the power tube body being in a vertical state relative to the capacitor core, and the connection end of the core conductive sheet of the capacitor core is arranged at the axial first end of the capacitor core, and the DC terminal is adjacent to the axial first end of the capacitor core, so that the side of the power tube body connected to the DC terminal is basically flush with the axial first end of the capacitor core, the structural design is more compact, the spatial layout is more reasonable, and the volume of the inverter is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] FIG1 is an exploded structural diagram of an inverter according to an embodiment;

[0035] FIG2 is a first assembly diagram of an inverter according to an embodiment;

[0036] FIG3 is a second assembly diagram of an inverter according to an embodiment;

[0037] FIG4 is a third assembly diagram of an inverter according to an embodiment;

[0038] FIG5 is a fourth assembly diagram of an inverter according to an embodiment;

[0039] FIG6 is a schematic diagram of a vehicle.

[0040] Description of reference numerals:

[0041] 10-inverter, 11-power tube, 12-first sub-power tube, 121-first signal terminal, 100-power tube body; 122-first sub-power tube body, 123-first AC terminal, 1231-first connecting portion, 124-first connecting terminal, 1241-first DC connecting portion, 13-second sub-power tube, 131-second signal terminal, 132-second sub-power tube body, 133-second AC terminal, 1331-second connecting portion, 134-second connecting terminal, 1341-second DC connecting portion, 14-first drive board, 15-second drive board, 30-connector, 31-threaded fastener, 16-first heat sink, 17-second heat sink, 18-third heat sink, 19-capacitor core, 1901-first side, 1902-second side, 20-liquid inlet pipe, 21-liquid outlet pipe, 22-box, 23-accommodating chamber, 24-first connecting end, 25-second connecting end, 27-third connecting end, 28-fourth connecting end, 26-connecting plate, 261-first detection slot, 262-second detection slot, X-first direction, Z-third direction, Y-second direction, 200-core conductive sheet, 240-first conductive sheet, 250-second conductive sheet, 35-DC terminal, 36-connecting end, 40-motor controller, 50-powertrain, 60-vehicle. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this application includes any and all combinations of one or more of the relevant listed items.

[0045] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0046] An embodiment of the present application provides an inverter 10 , as shown in FIG1 , FIG2 and FIG3 , which includes a power tube 11 , a heat sink, a capacitor core 19 and a core conductive sheet 200 .

[0047] The power tube 11 includes a power tube body and a DC terminal 35 connected to the power tube body.

[0048] The capacitor core 19 and the power tube 11 are arranged in a first direction X, which is substantially perpendicular to the power tube body. The capacitor core 19 includes a core conductive sheet 200, which includes a connection terminal 36. The connection terminal 36 is provided at a first axial end of the capacitor core 19. The DC terminal 35 is adjacent to the first axial end of the capacitor core 19 and is connected to the DC terminal 35. The first direction is preferably substantially perpendicular to the axial direction of the capacitor core 19.

[0049] It should be noted that all substantially vertical angles in this application are angles of about 90°, such as any angle between 85° and 90°.

[0050] In the related art, the power tube 11 and the driving board are generally arranged in sequence in the axial direction of the capacitor core 19, which will cause the axial space of the capacitor core 19 to be too large and difficult to assemble; and the core conductive sheet 200 is generally led out from the side of the capacitor core 19, and the DC terminal 35 of the power tube 11 is also led out from the same side, such as a side in the first direction X, and then the core conductive sheet 200 and the DC terminal 35 are connected. The connection between the core conductive sheet 200 and the DC terminal 35 is generally a connecting sheet perpendicular to the axial direction of the capacitor core 19. The two connecting sheets are relatively thin, and the axial height of the capacitor core 19 is relatively high. In this way, the axial space at the connection between the core conductive sheet 200 and the DC terminal 35 cannot be fully utilized.

[0051] In the related art, the power tube 11 is also arranged on the side of the capacitor core 19, that is, the power tube 11 and the capacitor core 19 are arranged in sequence along the first direction X, and the power tube body is generally parallel to the first direction X. It can be understood that the power tube 11 is flat, and in the axial direction of the capacitor core 19, the size of the power tube 11 is much smaller than the size of the capacitor core 19. This flattening method results in a lot of space corresponding to the power tube 11 in the axial direction of the capacitor core 19 that cannot be well utilized, resulting in a larger overall size of the controller.

[0052] By setting the power tube 11 and the capacitor core 19, the power tube 11 includes a power tube body and a DC terminal 35 connected to the power tube body. The capacitor core 19 and the power tube 11 are arranged in a first direction X. The first direction X is basically perpendicular to the power tube body, which is equivalent to the power tube body being in a vertical state relative to the capacitor core 19. The connection end 36 of the core conductive sheet 200 of the capacitor core 19 is provided at the axial first end of the capacitor core 19, and the DC terminal 35 is adjacent to the axial first end of the capacitor core 19, so that the side of the power tube body connected to the DC terminal 35 is basically flush with the axial first end of the capacitor core 19. The structural design is more compact, the spatial layout is more reasonable, and the volume of the inverter is reduced.

[0053] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 3 , the inverter 10 further includes a first heat sink 16 . In the first direction X, the first heat sink 16 is disposed between the capacitor core 19 and the power tube body 100 .

[0054] Because the capacitor core 19 and power transistor 11 are arranged along the first direction X, the connection end 36 and DC terminal 35 are also connected in the first direction X. Compared to the axial dimensions of the capacitor core 19 and power transistor body 100, the axial dimensions of the connection end 36 and DC terminal 35 are much smaller. The first heat sink 16 is disposed between the capacitor core 19 and power transistor body 100. The first heat sink 16 occupies the space where the core conductive sheet 200 and DC terminal 35 are connected, making the layout of the entire inverter 10 more compact in the first direction X.

[0055] Optionally, the first heat sink 16 is in a polygonal, circular, elliptical, or irregular shape. The shape of the first heat sink 16 may be, but is not limited to, a quadrilateral, pentagon, hexagon, octagon, circular, or elliptical.

[0056] Optionally, the connection between the connection end 36 and the DC terminal 35 may also reuse the size of the first heat sink 16 in the first direction X.

[0057] Specifically, the above arrangement of the first heat sink 16 improves the heat dissipation capability of the inverter 10 .

[0058] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 3 , the inverter 10 further includes a first driving plate 14 . In the first direction X, the first driving plate 14 is disposed between the capacitor core 19 and the first heat sink 16 .

[0059] The first driving board 14 is disposed between the capacitor core 19 and the first heat sink 16 . The first driving board 14 also occupies the space where the core conductive sheet 200 and the DC terminal 35 are connected, making the layout of the entire inverter 10 more compact in the first direction X.

[0060] Optionally, the first driving plate 14 is in the shape of a polygon, a circle, an ellipse, or an irregular shape. The shape of the first driving plate 14 may be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, or the like.

[0061] Specifically, the above arrangement of the first driving board 14 saves space of the inverter 10 .

[0062] In one embodiment, referring to Figures 1, 2, and 3, the core conductive sheet 200 includes a first conductive sheet 240 and a second conductive sheet 250. The first conductive sheet 240 has a first connection end 24. The second conductive sheet 250 has a second connection end 25. The first connection end 24 and the second connection end 25 are disposed near the first axial end of the capacitor core 19. The first connection end 24 and the second connection end 25 are disposed on a first side surface 1901 of the capacitor core 19, and the first side surface 1901 is adjacent to the power tube 11. The first connection end 24 and the second connection end 25 are stacked and spaced apart at the first axial end of the capacitor core 19. The DC terminal 35 includes a first connection terminal 124 and a second connection terminal 134. The first connection terminal 124 is connected to the first connection end 24. The second connection terminal 134 is connected to the second connection end 25. The connection terminal 36 includes a first connection end 24 and a second connection end 25.

[0063] Optionally, the first conductive sheet 240 and the second conductive sheet 250 are respectively connected to the first axial end of the capacitor core 19 and the second axial end of the capacitor core 19. The first conductive sheet 240 and the second conductive sheet 250 are both at least partially disposed near the first axial end of the capacitor core 19, and the first conductive sheet 240 and the second conductive sheet 250 are stacked and spaced apart near the portion of the first axial end of the capacitor core 19.

[0064] Optionally, the first connection terminal 124 is electrically connected to the first connection end 24. The second connection terminal 134 is electrically connected to the second connection end 25. Optionally, the first conductive sheet 240 and the second conductive sheet 250 are spaced apart. Optionally, the first conductive sheet 240 and the second conductive sheet 250 are spaced apart in a stacked manner along the third direction Z near the first axial end of the capacitor core 19.

[0065] Specifically, the above-described arrangement of the first conductive sheet 240 and the second conductive sheet 250 saves space in the inverter 10 , improves the compactness of components of the inverter 10 , and improves the conversion process from direct current to alternating current.

[0066] Optionally, the first connection end 24 and the second connection end 25 are spaced apart. Optionally, the first connection end 24, the third connection end 27, the second connection end 25 and the fourth connection end 28 are all made of copper.

[0067] Specifically, the above arrangement of the first conductive sheet 240 and the second conductive sheet 250 saves space in the inverter 10 and improves the conversion process from direct current to alternating current.

[0068] In one embodiment, referring to Figures 1, 2, and 3, the first conductive sheet 240 further includes a third connection end 27, and the second conductive sheet 250 further includes a fourth connection end 28. The third connection end 27 and the fourth connection end 28 are close to the second side surface 1902 of the capacitor core 19, and the second side surface 1902 is away from the power tube 11. The connection end 36 also includes the third connection end 27 and the fourth connection end 28.

[0069] Optionally, the third connection terminal 27 and the fourth connection terminal 28 are both made of copper. Optionally, the third connection terminal 27 and the fourth connection terminal 28 are spaced apart. Specifically, the above arrangement saves space for the inverter 10.

[0070] In one embodiment, referring to Figures 1, 2, and 3, the power tube 11 includes a first sub-power tube 12 and a second sub-power tube 13. The power tube body 100 includes a first sub-power tube body 122 and a second sub-power tube body 132. The first sub-power tube 12 includes a first sub-power tube body 122 and a first connection terminal 124. The second sub-power tube 13 includes a second sub-power tube body 132 and a second connection terminal 134. The first sub-power tube body 122 and the second sub-power tube body 132 are stacked in a first direction X with an interval between them.

[0071] Optionally, the first sub-power tube body 122 is electrically connected to the first connection terminal 124. The second sub-power tube body 132 is electrically connected to the second connection terminal 134. Optionally, current can be transmitted between the first sub-power tube body 122 and the first connection terminal 124, and current can be transmitted between the second sub-power tube body 132 and the second connection terminal 134.

[0072] Specifically, the above arrangement of the first sub-power tube 12 and the second sub-power tube 13 saves space of the inverter 10 and improves the conversion process from direct current to alternating current.

[0073] Specifically, the first sub-power tube body 122 and the second sub-power tube body 132 are stacked at intervals in the first direction X, which can reduce the number of power tubes 11 arranged in the second direction Y. This design ensures that the size of the power tube 11 in the second direction Y does not exceed the size of the capacitor core 19.

[0074] In one embodiment, referring to Figures 1, 2, and 3, the first connection terminal 124 optionally includes a first DC connection portion 1241. One end of the first DC connection portion 1241 is connected to the first sub-power transistor body 122, and the other end extends toward the first connection plate and is connected to the first connection end. The second connection terminal 134 includes a second DC connection portion 1341. One end of the second DC connection portion 1341 is connected to the second sub-power transistor body 132, and the other end extends toward the second connection plate and is connected to the second connection end.

[0075] Optionally, current can be transmitted between the first DC connection portion 1241 and the first sub-power tube body 122 , and current can be transmitted between the second DC connection portion 1341 and the second sub-power tube body 132 .

[0076] 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, there are multiple first DC connection portions 1241 and multiple second DC connection portions 1341.

[0077] Optionally, the first DC connection portion 1241 and the second DC connection portion 1341 are arranged at intervals. Optionally, the first DC connection portion 1241 and the second DC connection portion 1341 are arranged at equal intervals.

[0078] Optionally, the above arrangement of the first DC connection portion 1241 and the second DC connection portion 1341 saves space in the inverter 10 and improves the compactness of components of the inverter 10 .

[0079] In one embodiment, referring to Figures 1, 2, and 3, the first sub-power transistor 12 further includes a first AC terminal 123, and the second sub-power transistor 13 further includes a second AC terminal 133. The first AC terminal 123 and the second AC terminal 133 are disposed near the second axial end of the capacitor core 19. The first AC terminal 123 and the second AC terminal 133 are electrically connected. This design allows the first sub-power transistor 12 and the second sub-power transistor 13 to be connected to form a single-phase bridge arm, and the two sub-power transistors are stacked in the first direction X. When the first sub-power transistor 12 is turned on, the second sub-power transistor body 132 connected to the first sub-power transistor body 122 is reverse biased, generating a recovery current in the second sub-power transistor body 132 that is opposite to the current within the first sub-power transistor 12. The magnetic field generated by the reverse recovery current offsets the magnetic field generated by the current within the first sub-power transistor body 122. This reduces stray inductance in the power module circuit and improves the electromagnetic compatibility of the power module.

[0080] Optionally, the first sub-power tube body 122 is connected to the first AC terminal 123, and the second sub-power tube body 132 is connected to the second AC terminal 133. Optionally, current can be transmitted between the first sub-power tube body 122 and the first AC terminal 123, and current can be transmitted between the second sub-power tube body 132 and the second AC terminal 133. Optionally, the first AC terminal 123 and the second AC terminal 133 are stacked along the third direction Z.

[0081] Specifically, the above arrangement of the first AC terminal 123 and the second AC terminal 133 saves space of the inverter 10 and improves the conversion process from direct current to alternating current.

[0082] 1 , 2 and 3 , the first AC terminal 123 further includes a first connecting portion 1231 . One end of the first connecting portion 1231 is connected to the first sub-power tube body 122 , and the other end extends toward the second sub-power tube 13 .

[0083] The second AC terminal 133 includes a second connecting portion 1331 . One end of the second connecting portion 1331 is connected to the second sub-power tube body 132 , and the other end extends toward the first sub-power tube 12 and is connected to the first connecting portion 1231 .

[0084] Optionally, the first AC terminal 123 and the second AC terminal 133 are located on the same side of the third direction Z. Specifically, the first AC terminal 123 and the second AC terminal 133 provide a circuit for converting DC power into AC power for the inverter 10 .

[0085] Optionally, there are multiple first AC terminals 123 and multiple second AC terminals 133. Optionally, the first connecting portion 1231 is bent. Optionally, the second connecting portion 1331 is bent. Optionally, the first connecting portion 1231 is L-shaped. Optionally, the second connecting portion 1331 is L-shaped.

[0086] Specifically, the above arrangement of the first connecting portion 1231 and the second connecting portion 1331 saves space in the inverter 10 and improves the compactness of the components of the inverter 10 .

[0087] Optionally, referring to FIG. 1 , FIG. 2 and FIG. 3 , the first connection portion 1231 and the second connection portion 1331 are stacked and connected along a third direction Z, and the second direction Y intersects the first direction X.

[0088] Optionally, there are multiple first connection parts 1231 and multiple second connection parts 1331. Optionally, each first connection part 1231 and each second connection part 1331 are stacked in a one-to-one correspondence. Optionally, the first connection parts 1231 and the second connection parts 1331 are stacked along the third direction Z and electrically connected.

[0089] Specifically, the above-described arrangement of the first connecting portion 1231 and the second connecting portion 1331 saves space in the inverter 10 and improves the compactness of components of the inverter 10 .

[0090] In one embodiment, referring to Figures 1, 2, and 3, the first sub-power transistor 12 further includes a first signal terminal 121 extending in a direction away from the second sub-power transistor body 132. The second sub-power transistor 13 further includes a second signal terminal 131 extending in a direction away from the first sub-power transistor body 122.

[0091] The inverter 10 further includes a first driver board 14 and a second driver board 15. The first driver board 14 is disposed on a side of the first sub-power transistor body 122 that is away from the second sub-power transistor body 13 in the first direction X, and is connected to the first signal terminal 121. The second driver board 15 is disposed on a side of the second sub-power transistor body 132 that is away from the first sub-power transistor body 122 in the first direction X, and is connected to the second signal terminal 131.

[0092] Optionally, there are multiple first signal terminals 121 and multiple second signal terminals 131. Optionally, the multiple first signal terminals 121 are spaced apart along the second direction Y, and the multiple second signal terminals 131 are spaced apart along the second direction Y. Optionally, each first signal terminal 121 is disposed in a one-to-one correspondence with one second signal terminal 131 along the first direction X.

[0093] Optionally, the second driving plate 15 is in the shape of a polygon, a circle, an ellipse, or an irregular shape. The shape of the second driving plate 15 may be, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, an ellipse, or the like.

[0094] Optionally, the first drive board 14 is provided with a first row of pins, and the first drive board 14 is electrically connected to the second drive board 15 through the first row of pins, and signals or currents are transmitted through the first row of pins. Optionally, the second drive board 15 is provided with a second row of pins, and the second drive board 15 is electrically connected to other external components through the second row of pins, and signals or currents are transmitted through the second row of pins.

[0095] Specifically, the prior art has one driving board, but the driving board in the present application is split into a first driving board 14 and a second driving board 15, thereby reducing the area of ​​a single driving board and ensuring that the sizes of the first driving board 14 and the second driving board 15 do not exceed the entire module boundary.

[0096] During the assembly process of the inverter 10 , the present application connects a power tube 11 between the first driving board 14 and the second driving board 15 , thereby improving the flexibility of the driving board arrangement.

[0097] In one embodiment, referring to Figures 1, 2, and 3, the inverter 10 further includes a second heat sink 17. The second heat sink 17 is disposed between the first sub-power tube body 122 and the second sub-power tube body 132. The second heat sink 17 includes a first surface and a second surface that are opposite to each other. The first sub-power tube body 122 is disposed on the first surface, and the second sub-power tube body 132 is disposed on the second surface.

[0098] The top of the second heat dissipation plate 17 is close to the first axial end of the capacitor core 19 , and the bottom of the second heat dissipation plate 17 is close to the second axial end of the capacitor core 19 .

[0099] Optionally, the first driving board 14 is disposed between the capacitor core 19 and the second heat sink 17. The second heat sink 17, the first driving board 14, and one side surface of the capacitor core 19 in the third direction Z together constitute a first connection surface. The second heat sink 17, the first driving board 14, and one side surface of the capacitor core 19 in the second direction Y together constitute a second connection surface.

[0100] Optionally, a first mating groove is formed at one end of the second heat dissipation plate 17 along the third direction Z, and the surface of the bottom wall of the first mating groove is recessed relative to the first connection surface. Optionally, a second mating groove is formed at the other end of the second heat dissipation plate 17 along the third direction Z, and the structure of the second mating groove is the same as that of the first mating groove.

[0101] Optionally, the second heat sink 17 is disposed between the first sub-power tube 12 and the second sub-power tube 13 in the first direction X. Specifically, the second heat sink 17 improves the heat dissipation capability of the inverter 10 .

[0102] In one embodiment, referring to Figures 1, 2, and 3, there are multiple first sub-power tubes 12, and the multiple first sub-power tubes 12 are arranged in parallel along the second direction Y. There are multiple second sub-power tubes 13, and the multiple second sub-power tubes 13 are arranged in parallel along the second direction Y. Each first sub-power tube 12 is electrically connected to a second sub-power tube 13 in a one-to-one correspondence along the first direction X, and the second direction Y intersects the first direction X.

[0103] Optionally, the plurality of first sub-power tubes 12 are arranged at intervals along the second direction Y, and the plurality of second sub-power tubes 13 are arranged at intervals along the second direction Y.

[0104] Optionally, the plurality of first sub-power tubes 12 are arranged at equal intervals along the second direction Y, and the plurality of second sub-power tubes 13 are arranged at equal intervals along the second direction Y.

[0105] Specifically, the arrangement of the first sub-power tube 12 and the second sub-power tube 13 makes the layout of the first sub-power tube 12 and the second sub-power tube 13 compact and orderly.

[0106] Optionally, the above arrangement of the plurality of first sub-power tubes 12 and the plurality of second sub-power tubes 13 saves space in the inverter 10 and improves the compactness of the components of the inverter 10 .

[0107] In one embodiment, referring to FIG1 , FIG2 and FIG3 , the inverter 10 further includes a third heat sink 18 . The third heat sink 18 is disposed between the second sub-power tube body 132 and the second driving plate 15 .

[0108] Optionally, the first heat sink 16 and the third heat sink 18 improve the heat dissipation capability of the inverter 10 .

[0109] It should be noted that, in this application, optionally, the first sub-power tube 12 further includes a first packaging body and a first sub-power tube body 122. The first packaging body forms a first packaging cavity, and the first sub-power tube body 122 is packaged in the first packaging cavity.

[0110] The second sub-power tube 13 further includes a second packaging body and a second sub-power tube body 132. The second packaging body forms a second packaging cavity, and the second sub-power tube body 132 is packaged in the second packaging cavity.

[0111] Optionally, the shape of the first packaging cavity is one of a polygon, a circle, an ellipse, and an irregular shape. The shape of the first packaging cavity may specifically include, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, and an ellipse. Optionally, the shape of the second packaging cavity is one of a polygon, a circle, an ellipse, and an irregular shape. The shape of the second packaging cavity may specifically include, but is not limited to, a quadrilateral, a pentagon, a hexagon, an octagon, a circle, and an ellipse.

[0112] Specifically, the configuration of the first packaging body and the second packaging body improves the fixing level of the first sub-power tube body 122 and the second sub-power tube body 132 .

[0113] In one embodiment, referring to Figures 1, 2, and 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, while the axis of the outlet pipe 21 is approximately perpendicular to the third heat sink 18. The inlet pipe 20 is used to allow coolant to flow in, and the outlet pipe 21 is used to allow coolant to flow out.

[0114] Optionally, the axis of the liquid inlet pipe 20 is perpendicular to the third heat sink 18 , and the axis of the liquid outlet pipe 21 is perpendicular to the third heat sink 18 .

[0115] Specifically, the above-mentioned arrangement of the liquid inlet pipe 20 and the liquid outlet pipe 21 improves the heat dissipation capability of the inverter 10 .

[0116] In one embodiment, referring to Figures 1, 2 and 3, a first through hole and a second through hole are formed on the second driving plate 15. A liquid inlet pipe 20 is provided through the first through hole, and a liquid outlet pipe 21 is provided through the second through hole.

[0117] Optionally, the first through hole can be a polygonal hole, a circular hole, an elliptical hole, an irregular hole, etc. Optionally, the first through hole can be, but is not limited to, a quadrangular hole, a pentagonal hole, a hexagonal hole, an octagonal hole, a circular hole, an elliptical hole, etc.

[0118] Optionally, the second through hole can be a polygonal hole, a circular hole, an elliptical hole, an irregular hole, etc. Optionally, the second through hole can be, but is not limited to, a quadrangular hole, a pentagonal hole, a hexagonal hole, an octagonal hole, a circular hole, an elliptical hole, etc.

[0119] 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.

[0120] It should be noted that in the present application, optionally, the second heat dissipation plate 17 is provided with a first heat exchange cavity, the first heat dissipation plate 16 is provided with a second heat exchange cavity, and the third heat dissipation plate 18 is provided with a third heat exchange cavity, and the first heat exchange cavity, the second heat exchange cavity and the third heat exchange cavity are interconnected.

[0121] Optionally, the first heat exchange cavity is used for supplying coolant flow, the second heat exchange cavity is used for supplying coolant flow, and the third heat exchange cavity is used for supplying coolant flow. The flow direction of the coolant in the first heat exchange cavity, the second heat exchange cavity, and the third heat exchange cavity is not limited.

[0122] Specifically, the above-mentioned designs of the first heat exchange chamber, the second heat exchange chamber, and the third heat exchange chamber improve the heat dissipation effect of the inverter 10 .

[0123] In one embodiment, referring to FIG. 1 , FIG. 2 and FIG. 3 , the first driving board 14 and the second driving board 15 are connected via at least one connector 30 .

[0124] Optionally, the provision of at least one connector 30 improves the stability of the connection between the first driving board 14 and the second driving board 15 .

[0125] It should be noted that, in the present application, optionally, the second heat dissipation plate 17 , the first heat dissipation plate 16 and the third heat dissipation plate 18 are connected and fixed.

[0126] Optionally, the inverter 10 further includes a plurality of threaded fasteners 31. The plurality of threaded fasteners 31 are spaced apart. The second heat sink 17 is provided with a first mounting hole. The first heat sink 16 is provided with a second mounting hole. The third heat sink 18 is provided with a third mounting hole. The threaded fasteners 31 pass through the first mounting hole, the second mounting hole, and the third mounting hole in sequence to interconnect the second heat sink 17, the first heat sink 16, and the third heat sink 18, ensuring a tight connection between the second heat sink 17, the first heat sink 16, and the third heat sink 18.

[0127] In one embodiment, referring to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 and FIG. 5 , the inverter 10 further includes a box 22 , and the capacitor core 19 and the power tube 11 are encapsulated together in the box 22 .

[0128] Specifically, the above configuration provides support and insulation functions for the capacitor core 19 and the power tube 11 .

[0129] In one embodiment, please refer to Figures 1, 2, 3, 4 and 5, the inverter 10 also includes a box 22, a capacitor housing and an adhesive part (not shown), the capacitor core 19 is encapsulated in the capacitor housing to form a capacitor module, and the capacitor module and the power tube 11 are arranged in the box 22 through the adhesive part.

[0130] Optionally, the housing 22 encloses a housing cavity 23, and the inverter 10 further includes an adhesive member. The housing cavity 23 accommodates the capacitor core 19, the power tube 11, the first drive board 14, and the second drive board 15. The adhesive member is coated on the periphery of the capacitor core 19, the power tube 11, the first drive board 14, and the second drive board 15. The housing 22 surrounds the periphery of the adhesive member, thereby encapsulating the capacitor core 19 and the power tube 11 together, thereby improving the encapsulation effect of the capacitor core 19 and the power tube 11. Optionally, the adhesive member is a liquid glue, and the material of the adhesive member can be epoxy resin.

[0131] Optionally, the box 22 is made of plastic, and the inverter 10 is integrally cast with glue and fixed in the box 22 .

[0132] Optionally, the cross-sectional shape of the box body 22 may be polygonal, circular, elliptical, irregular, etc. Optionally, the cross-sectional shape of the box body 22 may be, but is not limited to, a quadrilateral, pentagon, hexagon, octagon, circular, elliptical, etc.

[0133] Specifically, all components within the housing 22 have the same height in the second direction Y, and the dimensions of the other components of the inverter 10 in the first direction X and the third direction Z are the same as those of the power tube 11. Specifically, only a few threaded fasteners are used to secure the components during the assembly of the inverter 10, simplifying the installation process and reducing costs.

[0134] In one embodiment, referring to FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the size of the power tube 11 in the second direction Y is the same as the size of the capacitor core 19 in the second direction Y, and the first direction X intersects the second direction Y.

[0135] Optionally, the size of the power tube 11 in the third direction Z is the same as the size of the capacitor core 19 in the third direction Z, and the first direction X intersects the second direction Y. Optionally, the height of all parts in the inverter 10 in the third direction Z is the same and is the same height as the power tube 11.

[0136] Specifically, the above arrangement is conducive to platformization of the inverter 10 , saves space of the inverter 10 , and improves the compactness of components of the inverter 10 .

[0137] In one embodiment, referring to Figures 1, 2, 3 and 4, the dimension of the inverter 10 in the first direction X is L1, and the dimension of the inverter 10 in the second direction Y is L2, satisfying: 0.9≤L1 / L2≤1.1, and the second direction Y intersects the first direction X.

[0138] Optionally, the first direction X, the second direction Y and the third direction Z are all perpendicular to each other.

[0139] Optionally, the L1 / L2 result may be, but is not limited to, 0.9, 1.0, and 1.1.

[0140] Optionally, the specific size of the inverter 10 in the first direction X can be appropriately extended to adapt according to the capacity and voltage requirements of the capacitor core 19, thereby improving the adaptability of the inverter 10. In addition, this size design is suitable for complex assembly environments and is conducive to creating platform products.

[0141] In one embodiment, referring to Figures 1, 2, 3, and 4, the inverter 10 optionally further includes a connecting plate 26. The connecting plate 26 is adapted to connect to the stator windings of the motor. The connecting plate 26 includes a first section and a second section. The first section connects to the electrical connection points of the corresponding first and second power sub-tubes 12, 13. The second section extends out of the housing 22 in a direction parallel to the axial direction of the capacitor core 19.

[0142] Optionally, each connecting plate 26 is stacked and connected to a second AC terminal 133. Optionally, the number of connecting plates 26 is three, and each connecting plate 26 is connected to a second AC terminal 133 in the second direction Y. Specifically, the above design of the connecting plate 26 saves space for the inverter 10. Each connecting plate 26 is provided with a first detection slot 261 and a second detection slot 262 opposite to each other, and the first detection slot 261 and the second detection slot 262 are staggered. Optionally, each connecting plate 26 is provided with a first detection slot 261 and a second detection slot 262 opposite to each other, 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, an irregular-shaped slot, etc. Optionally, the first detection slot 261 can be specifically, but not limited to, a quadrilateral slot, a pentagonal slot, a hexagonal slot, an octagonal slot, a circular slot, an elliptical slot, etc. Optionally, the second detection slot 262 may be a polygonal slot, a circular slot, an elliptical slot, an irregularly shaped slot, etc. Optionally, the second detection slot 262 may be, but is not limited to, a quadrilateral slot, a pentagonal slot, a hexagonal slot, an octagonal slot, a circular slot, an elliptical slot, etc.

[0143] Specifically, the first detection slot 261 and the second detection slot 262 are used for the coreless Hall chip to detect current, thereby improving the convenience of detection.

[0144] FIG. 6 shows a vehicle 60 .

[0145] The embodiment of the present application further provides a motor controller 40 , comprising the inverter 10 as described above.

[0146] The embodiment of the present application further provides a powertrain 50 , comprising the motor controller 40 as described above.

[0147] The embodiment of the present application further provides a vehicle 60 , comprising the powertrain 50 as described above.

[0148] Optionally, the vehicle 60 is a family car, a commercial vehicle, etc.

[0149] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientation or positional relationship of the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0150] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that implementing all or part of the processes of the above embodiment and making equivalent changes based on the present application still fall within the scope covered by the present application.

Claims

1. An inverter (10), characterized in that, Comprising: A power transistor (11), the power transistor (11) including a power transistor body (100) and a DC terminal (35) connected to the power transistor body (100); A capacitor core (19), the capacitor core (19) being arranged with the power transistor (11) in a first direction, the first direction being substantially perpendicular to the power transistor body (100), the capacitor core (19) including a core conductive sheet (200), the core conductive sheet (200) including a connection end (36), the connection end (36) being provided at an axial first end of the capacitor core (19), the DC terminal (35) being adjacent to the axial first end of the capacitor core (19), and the connection end (36) being connected to the DC terminal (35).

2. The inverter (10) according to claim 1, characterized in that, The inverter (10) further includes a first heat sink (16), and in the first direction, the first heat sink (16) is provided between the capacitor core (19) and the power transistor body (100).

3. The inverter (10) according to claim 2, characterized in that, The inverter (10) further includes a first drive board (14), and in the first direction, the first drive board (14) is provided between the capacitor core (19) and the first heat sink (16).

4. The inverter (10) according to claim 2, characterized in that, The core conductive sheet (200) includes a first conductive sheet (240) and a second conductive sheet (250), the first conductive sheet (240) having a first connection end (24), the second conductive sheet (250) having a second connection end (25), and the first connection end (24) and the second connection end (25) being arranged close to the axial first end of the capacitor core (19); The first connection end (24) and the second connection end (25) are provided on a first side surface (1901) of the capacitor core (19), the first side surface (1901) being close to the power transistor (11); the first connection end (24) and the second connection end (25) are arranged in a stacked and spaced manner at the axial first end of the capacitor core (19); the DC terminal (35) includes a first connection terminal (124) and a second connection terminal (134), the first connection terminal (124) being connected to the first connection end, and the second connection terminal (134) being connected to the second connection end (25).

5. The inverter (10) according to claim 4, characterized in that, The first conductive sheet (240) further has a third connection end (27), the second conductive sheet (250) further has a fourth connection end (28), the third connection end (27) and the fourth connection end (28) being close to a second side surface (1902) of the capacitor core (19), the second side surface (1902) being away from the power transistor (11).

6. The inverter (10) according to claim 4, characterized in that, The power tube (11) includes a first sub-power tube (12) and a second sub-power tube (13). The power tube body (100) includes a first sub-power tube body (122) and a second sub-power tube body (132). The first sub-power tube (12) includes the first sub-power tube body (122) and the first connection terminal (124). The second sub-power tube (13) includes the second sub-power tube body (132) and the second connection terminal (134). The first sub-power tube body (122) and the second sub-power tube body (132) are arranged in a stacked manner at intervals in the first direction.

7. The inverter (10) according to claim 6, characterized in that, The first sub-power tube (12) further includes a first AC terminal (123). The second sub-power tube (13) further includes a second AC terminal (133). The first AC terminal (123) and the second AC terminal (133) are arranged near the second axial end of the capacitor core (19), and the first AC terminal (123) and the second AC terminal (133) are electrically connected.

8. The inverter (10) according to claim 6, characterized in that, The first sub-power tube (12) further includes a first signal terminal (121). The first signal terminal (121) extends in a direction away from the second sub-power tube body (132). The second sub-power tube (13) further includes a second signal terminal (131). The second signal terminal (131) extends in a direction away from the first sub-power tube body (122). The inverter (10) further includes a first drive board (14) and a second drive board (15). The first drive board (14) is arranged on one side of the first sub-power tube body (122) away from the second sub-power tube (13) in the first direction and is connected to the first signal terminal (121). The second drive board (15) is arranged on one side of the second sub-power tube body (132) away from the first sub-power tube body (122) in the first direction and is connected to the second signal terminal (131).

9. The inverter (10) according to claim 6, characterized in that, The inverter (10) further includes a second heat sink (17). The second heat sink (17) is arranged between the first sub-power tube body (122) and the second sub-power tube body (132). The second heat sink (17) includes a first surface and a second surface facing away from each other. The first sub-power tube body (122) is arranged on the first surface, and the second sub-power tube body (132) is arranged on the second surface. The top of the second heat sink (17) is close to the first axial end of the capacitor core (19), and the bottom of the second heat sink (17) is close to the second axial end of the capacitor core (19).

10. The inverter (10) according to claim 6, characterized in that, The number of the first sub-power tubes (12) is multiple, and the multiple first sub-power tubes (12) are arranged in parallel along a second direction; the number of the second sub-power tubes (13) is multiple, and the multiple second sub-power tubes (13) are arranged in parallel along the second direction. Each first sub-power tube (12) is electrically connected to one second sub-power tube (13) in a one-to-one correspondence in a first direction, and the second direction intersects with the first direction.

11. The inverter (10) according to claim 8, characterized in that, The inverter (10) further includes a third heat dissipation plate (18), and the third heat dissipation plate (18) is disposed between the second sub-power tube body (132) and the second drive board (15).

12. The inverter (10) according to claim 11, characterized in that, The third heat dissipation plate (18) includes a liquid inlet pipe (20) and a liquid outlet pipe (21). The axis of the liquid inlet pipe (20) is approximately perpendicular to the third heat dissipation plate (18), and the axis of the liquid outlet pipe (21) is approximately perpendicular to the third heat dissipation plate (18). The liquid inlet pipe (20) is used for allowing a coolant to flow in, and the liquid outlet pipe (21) is used for allowing the coolant to flow out.

13. The inverter (10) according to claim 12, characterized in that, A first through hole and a second through hole are formed in the second drive board (15). The liquid inlet pipe (20) passes through the first through hole, and the liquid outlet pipe (21) passes through the second through hole.

14. The inverter (10) according to claim 8, characterized in that, The first drive board (14) and the second drive board (15) are connected by at least one connector (30).

15. The inverter (10) according to any one of claims 1 to 14, characterized in that, The inverter (10) further includes a box body (22), and the capacitor core (19) and the power tubes (11) are jointly potted in the box body (22).

16. The inverter (10) according to any one of claims 1 to 14, characterized in that, The size of the inverter (10) in the first direction is L1, and the size of the inverter (10) in the second direction is L2, satisfying: 0.9 ≤ L1 / L2 ≤ 1.

1. The second direction intersects with the first direction.

17. A motor controller (40), characterized in that, Including the inverter (10) according to any one of claims 1 to 14.

18. A powertrain (50), characterized in that, Including the motor controller (40) according to claim 17.

19. A vehicle (60), characterized in that, Including the power assembly (50) according to claim 18.

Images