Electric driving system

Abstract

The electric drive system comprises a shell, a motor body is arranged in the shell, and the shell is further internally provided with a controller high-voltage copper bar, a power source, a power source and a power source. A stator connection; two ends of the wiring structure are respectively connected with the controller high-voltage copper bar and the stator connecting piece; the controller high-voltage copper bar, the wiring structure and the stator connecting piece are arranged in the same direction in the radial direction of the motor body. According to the invention, the space occupation of the housing in the axial direction of the motor is reduced, the axial length of the motor is further reduced, the connection distance between the high-voltage copper bar of the controller and the stator connecting piece is reduced, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric drive system. BACKGROUND

[0002] With the continuous development of electric bridge / motor technology, the system integration requirement is higher and higher, and the motor is more and more integrated and miniaturized, but the connection difficulty between different components is increased. At present, the main driving motor generally arranges the controller high-voltage copper bar above the stator outlet end, and increases the copper bar high-voltage seat in the end cover to ensure the connection of the controller high-voltage copper bar and the stator connecting piece. The existing structure increases the length of the motor along the axial direction, increases the use of parts, and causes the overall size of the general electric bridge / motor to be larger, and the cost is higher. SUMMARY

[0003] The present application provides an electric drive system to solve the problem of large overall size of the motor.

[0004] An electric drive system, comprising a shell, a motor body is arranged in the shell, and the shell further comprises:

[0005] a controller high-voltage copper bar;

[0006] a stator connecting piece;

[0007] a wiring structure, two ends of the wiring structure are connected with the controller high-voltage copper bar and the stator connecting piece respectively;

[0008] wherein the controller high-voltage copper bar, the wiring structure and the stator connecting piece are arranged in the same direction in the radial direction of the motor body.

[0009] Further, the preset phase connection part of the controller high-voltage copper bar and the preset phase connection part of the stator connecting piece are located in the same plane and are aligned with each other, and the phase sequence of the preset phase connection part of the controller high-voltage copper bar is consistent with the phase sequence of the preset phase connection part of the stator connecting piece.

[0010] Further, the stator connecting piece is connected with a stator, the number of stator phases of the stator is greater than or equal to 3, and the phase sequence of the preset phase connection part of the stator connecting piece is located in the middle of the arrangement sequence of all phase connection parts of the stator connecting piece.

[0011] Further, the stator connecting piece is a stator three-phase connecting piece, the controller high-voltage copper bar comprises a first V-phase connecting part, the stator connecting piece comprises a second V-phase connecting part, the first V-phase connecting part and the second V-phase connecting part are located in the same plane and are aligned with each other.

[0012] Further, the inner cavity of the shell comprises a controller cavity, a communication channel and a motor cavity, the communication channel communicates the motor cavity and the controller cavity, the controller high-voltage copper bar is arranged in the controller cavity, the stator connecting piece is arranged in the motor cavity, and at least part of the wiring structure is located in the communication channel.

[0013] Further, the electric drive system further comprises an end cover, the end cover is connected with the side of the shell to form an end cover cavity, and the end cover cavity is independent of the communication channel.

[0014] Further, the wiring structure comprises a copper bar, and two ends of the copper bar are connected with the controller high-voltage copper bar and the stator connecting piece respectively.

[0015] Further, the number of the copper bars is multiple, and the copper bars are arranged in sequence and spaced apart along a direction perpendicular to an axial plane of the motor body, two ends of the copper bar are respectively provided with a first conductive piece and a second conductive piece, the first conductive piece is bent towards the direction in which the copper bar is arranged, so that the interval between adjacent first conductive pieces and the interval between adjacent second conductive pieces are different.

[0016] Further, the number of the copper bars is multiple, and the copper bars are arranged in sequence and spaced apart along a direction perpendicular to an axial plane of the motor body, two ends of the copper bar are respectively provided with a first conductive piece and a second conductive piece, the first conductive piece is bent towards the direction in which the copper bar is arranged, so that the interval between adjacent first conductive pieces and the interval between adjacent second conductive pieces are different.

[0017] Further, the wiring structure further comprises a fixing block, the copper bar is arranged in the fixing block, and the fixing block is fixed on the inner wall of the shell, at least part of the fixing block is arranged in the communication channel to block the communication channel.

[0018] Further, the wiring structure further comprises a first sealing piece, and the first sealing piece is filled in an interference manner between the communication channel and the fixing block.

[0019] Further, the wiring structure further comprises a second sealing piece, and the second sealing piece is filled in an interference manner between the fixing block and the copper bar.

[0020] Further, both ends of the fixing block are provided with lugs, the lugs are provided with threaded holes or through holes, the lugs are threadedly connected with the inner wall of the shell through the threaded holes, or the lugs are connected with the inner wall of the shell through the through holes.

[0021] Further, the bottom of the fixing block is provided with a fixing seat bottom cover, the fixing seat bottom cover is detachably connected with the fixing block, and the second sealing piece is located in the space enclosed by the fixing seat bottom cover and the fixing block.

[0022] Further, the fixing block is made of plastic.

[0023] Further, the wiring structure comprises a high-voltage wire.

[0024] The technical scheme has at least the following advantages:

[0025] The controller high-voltage copper bar and the stator connecting piece are arranged in the same direction in the radial direction of the motor, so that the space occupation of the shell in the axial direction of the motor is reduced, the axial length of the motor is reduced, the connection distance of the controller high-voltage copper bar and the stator connecting piece is reduced, and the cost is reduced.

[0026] The first V-phase connecting part and the second V-phase connecting part are located in the same plane and are aligned, so that the copper bar usage of the controller high-voltage copper bar is saved, and the cost is reduced.

[0027] The controller high-voltage copper bar and the stator connecting piece are directly connected through the copper bar, the high-voltage connecting wire can be cancelled, the number of parts is reduced, and the cost is reduced. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the technical scheme in the specific embodiments or prior art, the drawings needed in the description of the specific embodiments or prior art will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 It is a structural schematic diagram of the utility model;

[0030] Figure 2 It is a schematic diagram of relative positions of the first V-phase connecting part and the second V-phase connecting part;

[0031] Figure 3 It is a schematic diagram of the wiring structure;

[0032] Figure 4 It is a schematic diagram of the wiring structure;

[0033] Figure 5 It is a schematic diagram of the second sealing part arrangement position.

[0034] 1 - controller high-voltage copper bar; 11 - first U-phase connecting part; 12 - first V-phase connecting part; 13 - first W-phase connecting part; 2 - shell; 3 - wiring structure; 31 - copper bar; 311 - U-phase connecting piece; 312 - V-phase connecting piece; 313 - W-phase connecting piece; 32 - fixed block; 33 - first sealing part; 34 - fixed seat bottom cover; 35 - second connecting piece; 36 - mounting space; 4 - end cover; 5 - stator connecting piece; 51 - second U-phase connecting part; 52 - second V-phase connecting part; 53 - second W-phase connecting part. Detailed Implementation

[0035] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. 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.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal connection between two components; and they can refer to wireless connections or wired connections. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0039] Example 1

[0040] This embodiment proposes an electric drive system, such as Figure 1 As shown, the motor body is included, and in this embodiment, the motor body is a three-phase drive motor.

[0041] The motor body includes a housing 2, inside which are a controller high-voltage copper busbar 1, a wiring structure 3, and a stator connector 5. The controller high-voltage copper busbar 1 and the stator connector 5 are connected through the wiring structure 3.

[0042] The inner cavity of the shell 2 comprises a controller cavity and a motor cavity, the controller is installed in the controller cavity, and the motor is installed in the motor cavity, wherein the controller high-voltage copper bar 1 is installed on the controller, the stator connecting piece 5 is installed on the stator of the motor body, and the number of stator phases of the stator is 3 (that is, the motor body here is a three-phase motor). Therefore, the controller high-voltage copper bar 1 is arranged in the controller cavity, the motor is arranged in the motor cavity, and the controller high-voltage copper bar 1 and the stator connecting piece 5 are connected through the wiring structure 3 in the embodiment, so as to realize the electrical connection between the controller and the driving motor body.

[0043] In at least one embodiment, the controller high-voltage copper bar 1 and the stator connecting piece 5 are arranged in the same direction in the radial direction of the motor, that is, as shown in the spatial rectangular coordinate system, the controller high-voltage copper bar 1 is arranged above the Z direction of the stator connecting piece 5. Figure 1

[0044] The preset phase connecting part of the controller high-voltage copper bar 1 and the preset phase connecting part of the stator connecting piece 5 are located in the same plane and are aligned with each other, and the phase sequence of the preset phase connecting part of the controller high-voltage copper bar 1 is consistent with the phase sequence of the preset phase connecting part of the stator connecting piece 5.

[0045] In the embodiment, the phase connecting part of the controller high-voltage copper bar 1 comprises a first U-phase connecting part 11, a first V-phase connecting part 12 and a first W-phase connecting part 13, and the phase connecting part of the stator connecting piece 5 comprises a second U-phase connecting part 51, a second V-phase connecting part 52 and a second W-phase connecting part 53, wherein the first U-phase connecting part 11 is connected with the second U-phase connecting part 51, the first V-phase connecting part 12 is connected with the second V-phase connecting part 52, and the first W-phase connecting part 13 is connected with the second W-phase connecting part 53, so as to realize the connection with the U-phase, the V-phase and the W-phase of the motor.

[0046] ​In this embodiment, the first U-phase connecting part 11, the first V-phase connecting part 12 and the first W-phase connecting part 13 are arranged in sequence along the X direction of the space rectangular coordinate system, and the first V-phase connecting part 12 is located between the first U-phase connecting part 11 and the first W-phase connecting part 13; the second U-phase connecting part 51, the second V-phase connecting part 52 and the second W-phase connecting part 53 are arranged in sequence along the X direction of the space rectangular coordinate system, and the second V-phase connecting part 52 is located between the second U-phase connecting part 51 and the second W-phase connecting part 53. Considering that the spacing between the first U-phase connecting part 11 and the first W-phase connecting part 13 and the first V-phase connecting part 12 is different from the spacing between the second U-phase connecting part 51 and the second W-phase connecting part 53 and the second V-phase connecting part 52, the relative positions of the controller high-voltage copper bar 1 and the stator connecting part 5 are anchored through the first V-phase connecting part 12 and the second V-phase connecting part 52, and the distance between the controller high-voltage copper bar 1 and the stator connecting part 5 is the shortest. Compared with the prior art, the position of the controller copper bar 1 is arranged more inward in the axial direction of the motor, and the first V-phase connecting part 12 and the second V-phase connecting part 52 are both located in the same motor plane and are aligned, so that the connection of the controller copper bar 1 and the stator connecting part 5 does not need to increase the switching structure, that is, it is not necessary to arrange the switching structure in additional space, thereby saving the copper bar usage of the controller copper bar 1 and reducing the use of parts. Therefore, compared with the prior art, the arrangement mode of the embodiment saves the space of the shell 2 in the axial direction of the motor, thereby reducing the length of the motor in the axial direction, and thus reducing the cost.

[0047] The position relationship of the first V-phase connecting part 12 and the second V-phase connecting part 52 realizing that the first V-phase connecting part 12 and the second V-phase connecting part 52 are both located in the same motor radial plane and are aligned in the radial plane of the motor is shown in FIG. 2, wherein the X direction is the axial direction of the motor body, the XOZ plane is the radial plane of the motor body, and the first V-phase connecting part 12 and the second V-phase connecting part 52 are arranged in alignment. Figure 2

[0048] In the prior art, since the controller high-voltage copper bar 1 is arranged directly above the stator outgoing terminal, a connecting seat is arranged in the end cover 4 as a switching part to realize the connection between the controller high-voltage copper bar 1 and the stator connecting part 5. According to the arrangement mode of the embodiment, the switching seat mounting position in the end cover 4 is cancelled, the thickness and size of the end cover 4 can be reduced, and the raw material cost is reduced. The end cover 4 is installed on the left side of the shell 2 and is used to fix the motor rotor and form a sealed cavity in the inner cavity of the shell 2.

[0049] In at least one embodiment, the wiring mechanism includes a wiring structure 3, and the wiring structure 3 is arranged in the cavity of the shell 2 and is not connected with the end cover 4.

[0050] The wiring structure 3 blocks the communication passage Figure 1 ​The communication passage is used for communicating the controller cavity and the motor cavity, and the connection of the end cover 4 and the shell 2 forms an end cover cavity. The end cover cavity and the communication passage are independent of each other in the embodiment.

[0051] The controller cavity, the motor cavity and the communication passage in the embodiment are all surrounded by the inner wall of the shell 2, and the wiring structure 3 is fixed on the inner wall of the shell 2. Since the first V-phase connecting part 12 and the second V-phase connecting part 52 are both located in the same plane and the controller copper bar 1 is located directly above the stator connecting part 5, the wiring structure 3 can be completely arranged inside the shell 2.

[0052] As shown in Figure 3 and Figure 4 , the wiring structure 3 includes a copper bar 31, and the two ends of the copper bar 31 are connected with the controller high-voltage copper bar 1 and the stator connecting part 5 respectively. The two ends of the copper bar 31 are respectively provided with a first conductive part 311 and a second conductive part 312, and the copper bar 31 is connected to the controller high-voltage copper bar 1 and the stator connecting part 5 through the first conductive part 311 and the second conductive part 312 respectively. The first conductive part 311 and the second conductive part 312 can be made of conductive materials such as iron, aluminum, etc., or can be the copper bar itself.

[0053] In at least one embodiment, as shown in Figure 2 , the distance between the first U-phase connecting part 11 and the first V-phase connecting part 12 is greater than the distance between the second U-phase connecting part 51 and the second V-phase connecting part 52, and the distance between the first W-phase connecting part 13 and the first V-phase connecting part 12 is greater than the distance between the second W-phase connecting part 53 and the second V-phase connecting part 52. The number of copper bars 3 is 3, corresponding to U-phase, V-phase and W-phase respectively, and arranged in sequence along the direction perpendicular to the axial plane of the motor body. As shown in Figure 3 , the first conductive part 311 and the second conductive part 312 are arranged at the two ends of the copper bar 3, the first conductive part 311 is used for connecting with the first U-phase connecting part 11, the first V-phase connecting part 12 or the first W-phase connecting part 13, and the second conductive part 312 is used for connecting with the second U-phase connecting part 51, the second V-phase connecting part 52 or the second W-phase connecting part 53.

[0054] In the embodiment, the first conductive part 311 is bent towards the direction perpendicular to the axial plane of the motor body, i.e. the X direction, and the distance between adjacent first conductive parts 311 is greater than the distance between adjacent second conductive parts 312, so as to adapt to the positions of the second U-phase connecting part 51, the second V-phase connecting part 52, the second W-phase connecting part 53, the first U-phase connecting part 11, the first V-phase connecting part 12 and the first W-phase connecting part 13.

[0055] In at least one embodiment, the number of copper bars is multiple, and the copper bars are sequentially and spacedly arranged along a direction perpendicular to an axial plane of the motor body. The two ends of the copper bars are respectively provided with a first conductive member and a second conductive member. The interval between any two adjacent first conductive members is the same, and the interval between any two adjacent second conductive members is the same. That is, as shown in Figure 4 the first conductive member 311 and the second conductive member 312 are not bent, and in this case, the interval between the first U-phase connecting portion 11 and the first V-phase connecting portion 12 is equal to the interval between the second U-phase connecting portion 51 and the second V-phase connecting portion 52, and the interval between the first W-phase connecting portion 13 and the first V-phase connecting portion 12 is equal to the interval between the second W-phase connecting portion 53 and the second V-phase connecting portion 52.

[0056] The stator connecting member 3 is welded with a fixing nut, which facilitates the connection of the second conductive member.

[0057] In the embodiment, the wiring structure 3 includes a fixing block 32, and the copper bars 31 pass through the fixing block 32. The fixing block 32 is fixed to the inner wall of the shell 2. Specifically, both ends of the fixing block 32 outwardly extend with lugs, and the lugs are provided with bolt holes, so that the fixing block 32 is fixed in the shell 2 by means of threaded connection.

[0058] In at least one embodiment, the fixing block 32 is a plastic part, and the fixing block 32 is arranged on the copper bars 31 by injection molding.

[0059] In at least one embodiment, part of the fixing block 32 is arranged in the communication channel to block the communication channel. The lug of the fixing block 32 is located at the upper end of the communication channel, and the fixing block 32 enters the communication channel to block the communication channel. A first sealing member 33 is sleeved on the outer wall of the fixing block 32. In the embodiment, the first sealing member 33 is a sealing ring, which is interference-fitted between the communication channel and the fixing block 32, and is used to prevent the cooling oil in the motor cavity from entering the controller cavity through the gap between the fixing block 32 and the inner wall of the communication channel.

[0060] The fixing block 32 and the copper bars 31 are also interference-fitted with a second sealing member 35. In the embodiment, the second sealing member 35 is used to prevent the cooling oil in the motor cavity from entering the controller cavity through the gap between the copper bars 32 and the fixing block 32.

[0061] In at least one embodiment, if the cooling mode of the motor is water cooling, the first sealing member 33 and the second sealing member 35 are not required.

[0062] In this embodiment, in order to realize the replaceability of the second sealing member 35, a fixing seat bottom cover 34 is arranged at the bottom of the fixing block 32, and the fixing seat bottom cover 34 is detachably connected with the fixing block 32, which can be screw connection, clamping and the like. The second sealing member 35 is located inside the installation space 36 surrounded by the fixing seat bottom cover 34 and the fixing block 32. When the second sealing member 35 is damaged, the fixing seat bottom cover 34 can be disassembled to replace the second sealing member 35, and the second sealing member 35 has a certain protection effect, so that the overall high-voltage connection structure is simpler and more stable, and the cost is lower.

[0063] The two ends of the copper bar 31 are exposed relative to the fixing block 32, and the assembly with the shell 2 is realized through the fixing block 32, which can save the use of plastic, and the first sealing member 33 and the second sealing member 35 can play the role of separating the motor cavity and the controller cavity.

[0064] As shown in Figure 3 , the lug is provided with a threaded hole, so that the fixing block 32 is threadedly connected with the inner wall of the shell through the threaded hole; as shown in Figure 4 , the lug is provided with a through hole, and the fixing block is connected with the pin hole of the inner wall of the shell through the through hole.

[0065] In at least one embodiment, the controller high-voltage copper bar 1 and the stator connecting piece 5 can also be connected through a high-voltage connecting line, and the high-voltage connecting line is arranged in the communication channel in the form of winding.

[0066] Embodiment 2

[0067] The embodiment provides an electric drive system, which comprises a motor body, the motor body of the embodiment is a five-phase drive motor or a four-phase drive motor, and comprises a shell 2. The shell 2 is internally provided with a controller high-voltage copper bar 1 and a stator connecting piece 5. The controller high-voltage copper bar 1 and the stator connecting piece 5 are arranged in the same direction along the radial direction of the motor body.

[0068] When the drive motor is a five-phase drive motor, the stator connecting piece 5 is a stator five-phase connecting piece, which corresponds to A, B, C, D and E respectively.

[0069] The phase connection part of the controller high-voltage copper bar 1 includes a first A-phase connection part, a first B-phase connection part, a first C-phase connection part, a first D-phase connection part, and a first E-phase connection part, and the phase connection part of the stator connecting piece 5 includes a second A-phase connection part, a second B-phase connection part, a second C-phase connection part, a second D-phase connection part, and a second E-phase connection part. In this embodiment, the preset phase connection parts of the controller high-voltage copper bar 1 and the stator connecting piece 5 are located in the same plane, that is, the combination of the preset phase connection parts of the controller high-voltage copper bar 1 and the stator connecting piece 5 can be the first A-phase connection part and the second A-phase connection part, the first B-phase connection part and the second B-phase connection part, the first C-phase connection part and the second C-phase connection part, the first D-phase connection part and the second D-phase connection part, or the first E-phase connection part and the second E-phase connection part.

[0070] In this embodiment, the preset phase connection parts of the controller high-voltage copper bar 1 and the stator connecting piece 5 are located in the same plane, that is, the combination of the preset phase connection parts of the controller high-voltage copper bar 1 and the stator connecting piece 5 can be the first A-phase connection part and the second A-phase connection part, the first B-phase connection part and the second B-phase connection part, the first C-phase connection part and the second C-phase connection part, the first D-phase connection part and the second D-phase connection part, or the first E-phase connection part and the second E-phase connection part.

[0071] When the driving motor is a four-phase driving motor, the stator connecting piece 5 is a stator four-phase connecting piece, corresponding to U, V, W, and N respectively.

[0072] For the stator four-phase connecting piece, the preset phase connection parts in the middle part are the second V-phase connection part and the second W-phase connection part, and the preset phase connection parts in the middle part of the controller high-voltage copper bar 1 are the first V-phase connection part and the first W-phase connection part. In this embodiment, the second V-phase connection part and the first V-phase connection part are located in the same plane, or the second W-phase connection part and the first W-phase connection part are located in the same plane.

[0073] When the driving motor is a two-phase driving motor, the stator connecting piece 5 is a stator two-phase connecting piece, corresponding to A and B respectively. For the stator two-phase connecting piece, the preset phase connection parts are the second A-phase connection part and the second B-phase connection part, and the preset phase connection parts in the middle part of the controller high-voltage copper bar 1 are the first A-phase connection part and the first B-phase connection part. Then, the second A-phase connection part and the first A-phase connection part are located in the same plane, or the second B-phase connection part and the first B-phase connection part are located in the same plane.

[0074] When the driving motor is a single-phase driving motor, the stator connecting piece 5 is a stator single-phase connecting piece, and the preset phase connection part is the second A-phase connection part. The preset phase connection part in the middle part of the controller high-voltage copper bar 1 is the first A-phase connection part. Then, the second A-phase connection part and the first A-phase connection part are located in the same plane.

[0075] The remaining structure is the same as that of embodiment 1, and this embodiment will not be described in detail.

[0076] Obviously, the above embodiments are merely example for clearly illustrating but not limitation to the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments need not and can not be enumerated. The obvious changes or variations derived from the above description are still within the protection scope of the present application.

Claims

1. An electric drive system comprising a housing, a motor body being provided in the housing, characterized in that: The shell is also provided with: The controller high-voltage copper bar; The stator connecting piece; The wiring structure, both ends of which are connected with the controller high-voltage copper bar and the stator connecting piece respectively; The controller high-voltage copper bar, the wiring structure and the stator connecting piece are arranged in the same direction in the radial direction of the motor body.

2. The electric drive system of claim 1, wherein: The preset phase connecting part of the controller high-voltage copper bar and the preset phase connecting part of the stator connecting piece are located in the same plane and are aligned with each other, and the phase sequence of the preset phase connecting part of the controller high-voltage copper bar is consistent with the phase sequence of the preset phase connecting part of the stator connecting piece.

3. The electric drive system of claim 2, wherein: The stator connecting piece is connected with the stator, the number of stator phases of the stator is greater than or equal to 3, and the phase sequence of the preset phase connecting part of the stator connecting piece is located in the middle of the arrangement sequence of all phase connecting parts of the stator connecting piece.

4. The electric drive system of claim 3, wherein: The stator connecting piece is a stator three-phase connecting piece, the controller high-voltage copper bar includes a first V-phase connecting part, the stator connecting piece includes a second V-phase connecting part, and the first V-phase connecting part and the second V-phase connecting part are located in the same plane and are aligned with each other.

5. The electric drive system of claim 1, wherein: The inner cavity of the shell includes a controller cavity, a communication channel and a motor cavity, the communication channel communicates the motor cavity and the controller cavity, the controller high-voltage copper bar is arranged in the controller cavity, the stator connecting piece is arranged in the motor cavity, and at least part of the wiring structure is located inside the communication channel.

6. The electric drive system of claim 5, wherein: The electric drive system further includes an end cover, the end cover is connected with the side of the shell to form an end cover cavity, and the end cover cavity is independent of the communication channel.

7. The electric drive system of claim 5, wherein: The wiring structure includes a copper bar, both ends of the copper bar are connected with the controller high-voltage copper bar and the stator connecting piece respectively.

8. The electric drive system of claim 7, wherein: The number of the copper bars is multiple, and the copper bars are arranged in sequence and at intervals along a direction perpendicular to the axial plane of the motor body, both ends of the copper bar have a first conductive part and a second conductive part, the first conductive part is bent towards the direction in which the copper bar is arranged, so that the interval between adjacent first conductive parts and the interval between adjacent second conductive parts are different.

9. The electric drive system of claim 7, wherein: The number of the copper bars is multiple, and the copper bars are arranged in sequence and at intervals along a direction perpendicular to the axial plane of the motor body, both ends of the copper bar have a first conductive part and a second conductive part, the interval between adjacent first conductive parts is the same, and the interval between adjacent second conductive parts is the same.

10. The electric drive system of claim 7, wherein: The wiring structure further includes a fixing block, the copper bar is arranged in the fixing block, and the fixing block is fixed on the inner wall of the shell, at least part of the fixing block is arranged in the communication channel and used for plugging the communication channel.

11. The electric drive system of claim 10, wherein: The wiring structure further includes a first sealing member, and the first sealing member is filled in the communication channel and the fixing block in an interference manner.

12. The electric drive system of claim 10, wherein: The wiring structure further includes a second sealing member, and the second sealing member is filled in the fixing block and the copper bar in an interference manner.

13. The electric drive system of claim 10, wherein: Both ends of the fixing block are provided with lugs, the lugs are provided with threaded holes or through holes, the lugs are threadedly connected with the inner wall of the shell through the threaded holes, or the lugs are connected with the inner wall of the shell through the through holes.

14. The electric drive system of claim 12, wherein: The fixed block is provided with a fixed seat bottom cover which is detachably connected with the fixed block, and the second sealing element is located inside the space surrounded by the fixed seat bottom cover and the fixed block.

15. The electric drive system according to any one of claims 10-14, characterized by: The fixed block is made of plastic.

16. The electric drive system of claim 1, wherein: The wiring structure comprises a high-voltage wire.

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