Motor stator, motor, power assembly and vehicle

Abstract

The utility model discloses a motor stator, a motor, a power assembly and a vehicle, the motor stator comprises a stator iron core, a casing, a first sealing cover, a second sealing cover, an insulating sleeve and a stator winding, and the stator iron core is provided with a stator groove extending along the axial direction of the stator iron core; a housing which accommodates the stator core; a first accommodating cavity is formed in a region between the first sealing cover and one side of the stator iron core; a second accommodating cavity is formed in a region between the second sealing cover and the other side of the stator iron core; the insulation sleeve is inserted in the stator groove, the insulation sleeve is provided with a first cooling channel extending along the axial direction of the stator core, and the first cooling channel is communicated with the first accommodating cavity and the second accommodating cavity; the stator winding is inserted in the first cooling channel, the first end of the stator winding is accommodated in the first accommodating cavity, and the second end of the stator winding is accommodated in the second accommodating cavity. The motor stator provided by the utility model is good in overall cooling effect, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a motor stator, a motor, a powertrain and a vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, the performance requirements for motors are getting higher and higher. The motor consists of a stator and a rotor. The stator is the stationary part of the motor, and the stator core is used to form a magnetic flux path and embed the stator winding. The stator core of the existing motor is generally made of silicon steel punchings with a high silicon content, which are stacked in groups. Losses will occur during the operation of the motor. These losses will serve as a heat source to heat the motor components, causing the motor temperature to rise, reducing operating efficiency and reliability.

[0003] The existing motor cools the stator core and the stator winding by spraying the cooling medium. However, since the cooling medium is only sprayed onto the surface of the stator core and the stator winding, the cooling effect is poor and the heat dissipation efficiency is low. Utility Model Content

[0004] The purpose of the present application is to provide a motor stator, a motor, a power assembly and a vehicle to solve the problems of poor cooling effect and low heat dissipation efficiency of the motor stator.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides a motor stator, comprising:

[0007] A stator core, wherein the stator core is provided with stator slots extending along the axial direction of the stator core;

[0008] a casing, the casing accommodating the stator core;

[0009] A first sealing cover, wherein the first sealing cover is disposed on one side of the stator core along the axial direction, and an area between the first sealing cover and one side of the stator core forms a first accommodating cavity;

[0010] A second sealing cover, wherein the second sealing cover is arranged at the other side of the stator core in the axial direction, and the area between the second sealing cover and the other side of the stator core forms a second accommodating cavity;

[0011] An insulating sleeve, inserted in the stator slot, the insulating sleeve is provided with a first cooling channel extending along the axial direction of the stator core, the first cooling channel communicating with the first accommodating cavity and the second accommodating cavity;

[0012] The stator winding is inserted in the first cooling channel, the first end of the stator winding is accommodated in the first accommodating cavity, and the second end of the stator winding is accommodated in the second accommodating cavity.

[0013] In one embodiment, a plurality of stator slots are provided, and the plurality of stator slots are spaced apart along the circumference of the stator core. The insulating sleeve includes a plurality of sleeves, and the plurality of sleeves are arranged along the circumference of the stator core. A sleeve is inserted into each of the stator slots, and the first cooling channel is provided in each of the sleeves.

[0014] In one embodiment, the insulating sleeve is integrally provided.

[0015] In one embodiment, the motor stator further includes a first sealing ring and a second sealing ring, wherein the first sealing ring abuts between the inner wall of the first sealing cover and the first end of the stator core, and the second sealing ring abuts between the inner wall of the second sealing cover and the second end of the stator core.

[0016] In one embodiment, the insulating sleeve is provided with a first convex edge and a second convex edge around the circumference of the stator core, and the first convex edge and the second convex edge are respectively provided at two ends of the insulating sleeve along the axial direction of the stator core;

[0017] The first sealing cover is provided with a third flange around the circumference of the stator core, the second sealing cover is provided with a fourth flange around the circumference of the stator core, the third flange is located at the first end of the stator core, the fourth flange is located at the second end of the stator core, the first flange and the third flange are spaced apart in the radial direction of the stator core, and the second flange and the fourth flange are spaced apart in the radial direction of the stator core;

[0018] The first sealing ring is disposed between the first protrusion and the third protrusion, and the second sealing ring is disposed between the second protrusion and the fourth protrusion.

[0019] In one embodiment, the stator slots are provided in plurality, and the plurality of stator slots are arranged at intervals along the circumference of the stator core, the insulating sleeve comprises a plurality of sleeves, and the plurality of sleeves are arranged along the circumference of the stator core, one sleeve is inserted into each of the stator slots, and each of the sleeves is provided with the first cooling channel;

[0020] The first protrusion is connected to the same end of the plurality of sleeves, and the second protrusion is connected to the other end of the plurality of sleeves.

[0021] In one embodiment, a second cooling channel is provided inside the stator core and / or between the outer wall of the stator core and the inner wall of the casing, and the second cooling channel communicates with the first accommodating cavity and the second accommodating cavity.

[0022] In one embodiment, the second cooling channel is disposed in the stator core, the second cooling channel extends along the axial direction of the stator core, and the second cooling channel passes through the first end and the second end of the stator core.

[0023] In one embodiment, a cooling groove is provided on the inner wall of the casing, and the groove wall of the cooling groove and the outer wall of the stator core form the second cooling channel.

[0024] In one embodiment, a plurality of the second cooling channels are provided, and the plurality of the second cooling channels are arranged along the circumferential direction of the stator core.

[0025] In one embodiment, the stator core includes a plurality of stacked magnetic conductive sheets, and an adhesive layer is provided between two adjacent magnetic conductive sheets.

[0026] In one embodiment, the stator core includes a plurality of stacked magnetic conductive sheets, the magnetic conductive sheets include a first magnetic conductive sheet and a second magnetic conductive sheet, the first magnetic conductive sheet includes a first sheet body and a second sheet body that are separately arranged, the second magnetic conductive sheet includes a third sheet body and a fourth sheet body that are separately arranged, a first lug is provided at one end of the first sheet body, the second sheet body is provided with a second lug, the third sheet body is provided with a third lug, and the fourth sheet body is provided with a fourth lug, the first lug is connected to the third lug via a first connecting member, and the second lug is connected to the fourth lug via a second connecting member.

[0027] In a second aspect, the present application further provides a motor, comprising the motor stator as described in the first aspect.

[0028] In a third aspect, the present application also provides a powertrain, comprising the motor as described in the second aspect.

[0029] In a fourth aspect, the present application also provides a vehicle, comprising the motor as described in the second aspect or the powertrain as described in the third aspect.

[0030] The motor stator provided in the present application comprises a first sealing cover and a stator core forming a first accommodating cavity, a second sealing cover and a stator core forming a second accommodating cavity, an insulating sleeve is inserted in a stator slot on the stator core, a first cooling channel in the insulating sleeve is connected with the first accommodating cavity and the second accommodating cavity, and a stator winding is inserted in the first cooling channel, so that the interior, the first end and the second end of the stator core, and the stator winding can be cooled, so that the overall cooling effect of the motor stator is good and the heat dissipation efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. 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.

[0032] Figure 1 A three-dimensional diagram of a motor stator according to an embodiment of the present application;

[0033] Figure 2 A partial structural cross-sectional view of a motor stator according to an embodiment of the present application;

[0034] Figure 3 A top view of a stator core, an insulating sleeve, and a stator winding according to an embodiment of the present application;

[0035] Figure 4 A three-dimensional diagram of an insulating sleeve according to an embodiment of the present application;

[0036] Figure 5 A three-dimensional diagram of a first sealing cover according to an embodiment of the present application;

[0037] Figure 6 A cross-sectional view of a motor stator according to an embodiment of the present application;

[0038] Figure 7 A cross-sectional view of a stator core and a stator winding according to an embodiment of the present application;

[0039] Figure 8 This is a structural diagram of a magnetic conductive sheet according to one embodiment of the present application.

[0040] Description of reference numerals:

[0041] 100, stator core; 110, stator slot; 120, magnetic conductive sheet; 121, first sheet; 121a, first lug; 121b, first plug hole; 122, second sheet; 122a, second lug; 122b, second plug hole; 130, adhesive layer; 210, housing; 211, inlet; 212, cooling groove; 220, first sealing cover; 221, third flange; 230, second sealing cover; 231, fourth flange; 240, first accommodating cavity; 250, second accommodating cavity; 300, insulating sleeve; 310, first cooling channel; 320, sleeve; 330, first flange; 340, second flange; 400, stator winding; 500, first sealing ring; 600, second sealing ring; 700, second cooling channel. DETAILED DESCRIPTION

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

[0043] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

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

[0045] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] The present application provides a vehicle, the vehicle includes a powertrain and a frame, the powertrain is connected to the frame. The powertrain provides power to the vehicle to drive the vehicle. The vehicle includes a fuel vehicle, a pure electric vehicle and a hybrid vehicle.

[0047] In pure electric vehicles and hybrid electric vehicles, the motor is the main power source of the vehicle, and the performance of the motor is an important factor affecting the power of the whole vehicle. The motor includes a motor stator and a motor rotor, and the motor rotor is arranged in the motor stator. The main function of the motor stator is to generate a rotating magnetic field, and the main function of the motor rotor is to be cut by the magnetic lines of force in the rotating magnetic field and then output current to convert into mechanical energy.

[0048] Amorphous materials such as iron, silicon, and boron have the advantage of low iron loss and are used in motors. However, due to many problems such as poor thermal conductivity and low thermal expansion coefficient of amorphous materials themselves, a large amount of Joule heat is generated in the winding itself during motor operation, resulting in a decrease in motor performance.

[0049] refer to Figure 1 , Figure 2 and Figure 3The present application provides a motor stator, including a stator core 100, a housing 210, a first sealing cover 220, a second sealing cover 230, an insulating sleeve 300 and a stator winding 400. The stator core 100 is provided with a stator slot 110 extending along the axial direction of the stator core 100; the housing 210 is used to accommodate the stator core 100; the first sealing cover 220 is arranged on one side of the stator core 100 along the axial direction, and the area between the first sealing cover 220 and one side of the stator core 100 forms a first accommodating cavity 240; the second sealing cover 230 is arranged on the other side of the stator core 100 along the axial direction, and the second The area between the sealing cover 230 and the other side of the stator core 100 forms a second accommodating cavity 250; the insulating sleeve 300 is inserted in the stator slot 110, and the insulating sleeve 300 is provided with a first cooling channel 310 extending axially along the stator core 100, and the first cooling channel 310 connects the first accommodating cavity 240 and the second accommodating cavity 250; the stator winding 400 can generate a magnetic field after power is supplied, and the stator winding 400 is inserted in the first cooling channel 310, and the first end of the stator winding 400 is accommodated in the first accommodating cavity 240, and the second end of the stator winding 400 is accommodated in the second accommodating cavity 250. The motor stator provided in the present application comprises a first sealing cover 220 and a stator core 100 to form a first accommodating cavity 240, a second sealing cover 230 and a stator core 100 to form a second accommodating cavity 250, an insulating sleeve 300 is inserted into a stator slot 110 on the stator core 100, a first cooling channel 310 in the insulating sleeve 300 is connected with the first accommodating cavity 240 and the second accommodating cavity 250, and a stator winding 400 is inserted into the first cooling channel 310, so that the interior, the first end and the second end of the stator core 100, and the stator winding 400 can be cooled, so that the overall cooling effect of the motor stator is good and the heat dissipation efficiency is improved.

[0050] It should be noted that the first sealing cover 220 and the second sealing cover 230 can be connected to the two axial sides of the housing 210 respectively, so that the area between the first sealing cover 220 and the stator core 100 forms the first accommodating cavity 240, and the area between the second sealing cover 230 and the stator core 100 forms the second accommodating cavity 250. Or the first sealing cover 220 and the second sealing cover 230 are both arranged inside the housing 210, and the first sealing cover 220 is directly sleeved on one axial side of the stator core 100, and the second sealing cover 230 is directly sleeved on the other axial side of the stator core 100, so that the first sealing cover 220 and the stator core 100 enclose the first accommodating cavity 240, and the second sealing cover 230 and the stator core 100 enclose the second accommodating cavity 250.

[0051] Specifically, a coolant flows in the first accommodating cavity 240, the second accommodating cavity 250 and the first cooling channel 310 to cool the stator core 100 and the stator winding 400. The coolant may be a cooling liquid or a cooling gas.

[0052] refer to Figure 2 , Figure 3 and Figure 4 The stator core 100 is provided with a plurality of stator slots 110, which are arranged at intervals along the circumference of the stator core 100. The insulating sleeve 300 includes a plurality of sleeves 320, which are arranged along the circumference of the stator core 100. A sleeve 320 is inserted in each stator slot 110, and a first cooling channel 310 is provided in each sleeve 320 to improve the cooling effect of the stator winding 400 as a whole. Specifically, the insulating sleeve 300 is integrally formed by injection molding, which is convenient for manufacturing, and the insulating sleeve 300 has insulation and heat conduction functions. The stator winding 400 is inserted into each sleeve 320 of the insulating sleeve 300, so that the stator windings 400 in each stator slot 110 are insulated from each other, and the stator windings 400 are prevented from short-circuiting, thereby improving the insulation performance and voltage resistance of the motor stator. After the stator winding 400 is inserted into the insulating sleeve 300 , the coolant in the first accommodating cavity 240 and the second accommodating cavity 250 may flow into the first cooling channel 310 to further cool the stator winding 400 .

[0053] Among them, the insulating sleeve 300 is provided with a first flange 330 and a second flange 340 around the circumference of the stator core 100, and the first flange 330 and the second flange 340 are respectively provided at both ends of the insulating sleeve 300 along the axial direction of the stator core 100, the first flange 330 is connected to the same end of the plurality of sleeves 320, and the second flange 340 is connected to the other end of the plurality of sleeves 320, so that the insulating sleeve 300 forms an integral structure, which facilitates the one-time insertion of the insulating sleeve 300 into the stator slot 110, and is easy to install. In addition, the first flange 330 and the second flange 340 provide support for the plurality of sleeves 320, thereby improving the overall structural strength of the insulating sleeve 300.

[0054] In the motor stator provided in the present application, the motor stator further includes a first sealing ring 500 and a second sealing ring 600, wherein the first sealing ring 500 is disposed between the inner wall of the first sealing cover 220 and the first end of the stator core 100, and the second sealing ring 600 is disposed between the inner wall of the second sealing cover 230 and the second end of the stator core 100. Specifically, the first sealing ring 500 is disposed around the circumference of the stator core 100, and the second sealing ring 600 is disposed around the circumference of the stator core 100, so as to achieve sealing between the first sealing cover 220 and the stator core 100, and between the second sealing cover 230 and the stator core 100, and suppress leakage of coolant in the first accommodating cavity 240 and the second accommodating cavity 250.

[0055] refer to Figure 2 , Figure 4 and Figure 5A third flange 221 is provided on the first sealing cover 220 around the circumference of the stator core 100, a fourth flange 231 is provided on the second sealing cover 230 around the circumference of the stator core 100, the third flange 221 is located at the first end of the stator core 100, the fourth flange 231 is located at the second end of the stator core 100, the first flange 330 and the third flange 221 are spaced apart along the radial direction of the stator core 100, the second flange 340 and the fourth flange 231 are spaced apart along the radial direction of the stator core 100; the first sealing ring 500 is abutted between the first flange 330 and the third flange 221, and the second sealing ring 600 is abutted between the second flange 340 and the fourth flange 231. In the present application, the first sealing ring 500 is pressed against the first end of the stator core 100 and the first sealing cover 220 in the axial direction of the stator core 100, and the first sealing ring 500 is pressed against the first flange 330 and the third flange 221 in the radial direction of the stator core 100, thereby realizing axial and radial sealing between the first sealing cover 220 and the stator core 100; the second sealing ring 600 is pressed against the second end of the stator core 100 and the second sealing cover 230 in the axial direction of the stator core 100, and the second sealing ring 600 is pressed against the second flange 340 and the fourth flange 231 in the radial direction of the stator core 100, thereby realizing axial and radial sealing between the second sealing cover 230 and the stator core 100, and further improving the sealing performance of the first accommodating cavity 240 and the second accommodating cavity 250.

[0056] In the motor stator provided in the present application, a second cooling channel 700 is provided inside the stator core 100 and / or between the outer wall of the stator core 100 and the inner wall of the housing 210, and the second cooling channel 700 communicates with the first accommodating cavity 240 and the second accommodating cavity 250. The first accommodating cavity 240 and the second accommodating cavity 250 are filled with coolant, and the interior or the peripheral surface of the stator core 100 can be further cooled through the second cooling channel 700, so that the overall cooling effect of the motor stator is good and the heat dissipation efficiency is improved.

[0057] In one embodiment, reference Figure 6 and Figure 7 The second cooling channel 700 is disposed in the stator core 100, and the second cooling channel 700 extends along the axial direction of the stator core 100, and the second cooling channel 700 passes through the first end and the second end of the stator core 100. The coolant in the first accommodating cavity 240 and the second accommodating cavity 250 flows into the second cooling channel 700 on the stator core 100 to cool the inside of the stator core 100; and the second cooling channel 700 is disposed along the axial direction of the stator core 100, so as to facilitate the arrangement of the second cooling channel 700 and to cool the stator core 100 in the axial direction.

[0058] Specifically, an inlet 211 connected to the first accommodating cavity 240 or the second accommodating cavity 250 is opened on the casing 210. The coolant enters the casing 210 through the inlet 211, and then flows into the first accommodating cavity 240, the second accommodating cavity 250 and the second cooling channel 700. The stator core 100 and the stator winding 400 are cooled by the flowing coolant.

[0059] refer to Figure 2 ,and Figure 7 In contrast, a cooling groove 212 is provided on the inner wall of the housing 210, and the groove wall of the cooling groove 212 and the outer wall of the stator core 100 form a second cooling channel 700. Specifically, the second cooling channel 700 of this embodiment is provided between the stator core 100 and the housing 210, and by providing the cooling groove 212 on the inner wall of the housing 210, the groove wall of the cooling groove 212 and the outer wall of the stator core 100 form the second cooling channel 700, so as to cool the outer peripheral wall of the stator core 100.

[0060] The second cooling channel 700 may also be provided on the outer peripheral wall of the stator core 100, and can also cool the stator core 100. Alternatively, cooling grooves 212 may be provided on both the inside of the stator core 100 and the inner wall of the housing 210 to cool both the inside and the outer peripheral wall of the stator core 100, thereby further improving the cooling efficiency of the motor stator.

[0061] In the motor stator provided in the present application, a plurality of second cooling channels 700 are provided, and the plurality of second cooling channels 700 are provided along the circumferential direction of the stator core 100. Specifically, the plurality of second cooling channels 700 are evenly distributed in the stator core 100 or on the outer peripheral wall of the stator core 100, so that the stator core 100 is evenly cooled and the heat dissipation effect is improved.

[0062] refer to Figure 2 , Figure 3 and Figure 8 The stator core 100 includes a plurality of stacked magnetic conductive sheets 120, and an adhesive layer 130 is provided between two adjacent magnetic conductive sheets 120. Specifically, the stator core 100 is formed by stacking a plurality of magnetic conductive sheets 120. Since the magnetic conductive sheets 120 are made of thin magnetic conductive materials, the plurality of magnetic conductive sheets 120 are bonded by the adhesive layer 130, thereby improving the overall structural strength of the stator core 100, effectively reducing the generation of noise and vibration, and improving the running stability and comfort of the motor.

[0063] In one embodiment, the magnetic conductive sheet 120 includes a first magnetic conductive sheet and a second magnetic conductive sheet, the first magnetic conductive sheet includes a first sheet body 121 and a second sheet body 122 which are separately arranged, the second magnetic conductive sheet includes a third sheet body and a fourth sheet body which are separately arranged, a first lug 121a is provided at one end of the first sheet body 121, the second sheet body 122 is provided with a second lug 122a, the third sheet body is provided with a third lug, and the fourth sheet body is provided with a fourth lug, the first lug 121a is connected to the third lug through a first connecting member, and the second lug 122a is connected to the fourth lug through a second connecting member. Specifically, the conductor sheet is formed by splicing a plurality of sheets, which can greatly reduce the manufacturing cost and facilitate the manufacture of magnetic conductive sheets 120 with a larger diameter. At the same time, lugs are provided on each sheet so that any magnetic conductive sheet 120 has at least two lugs, and are respectively inserted into the first plug hole 121b and the second plug hole 122b through the first connecting member and the second connecting member to achieve connection between the plurality of magnetic conductive sheets 120, so as to facilitate fixing the stator core 100 to the casing 210. The first connecting member and the second connecting member are made of non-magnetic materials.

[0064] The motor provided in the present application includes a motor stator and a motor rotor, wherein the motor rotor is arranged in a stator core 100, and the motor rotor includes a rotating shaft and a rotor core sleeved on the rotating shaft, and the rotor core is fixedly connected to the rotating shaft. Specifically, the rotor core is made of a magnetic conductive material with high tensile strength, and a plurality of slots are arranged in its axial direction, and permanent magnets are placed in the slots, and the rotor core is fixed to the rotating shaft by an interference fit or a key fit; the outer peripheral surface of the rotor core is covered with a carbon fiber film to improve the structural strength of the motor rotor, thereby improving the performance and efficiency of the motor.

[0065] 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 described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0066] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A motor stator, characterized in that: include: A stator core, wherein the stator core is provided with stator slots extending along the axial direction of the stator core; a casing, the casing accommodating the stator core; A first sealing cover, wherein the first sealing cover is disposed on one side of the stator core along the axial direction, and an area between the first sealing cover and one side of the stator core forms a first accommodating cavity; A second sealing cover, wherein the second sealing cover is arranged at the other side of the stator core in the axial direction, and the area between the second sealing cover and the other side of the stator core forms a second accommodating cavity; An insulating sleeve, inserted in the stator slot, the insulating sleeve is provided with a first cooling channel extending along the axial direction of the stator core, the first cooling channel communicating with the first accommodating cavity and the second accommodating cavity; The stator winding is inserted in the first cooling channel, the first end of the stator winding is accommodated in the first accommodating cavity, and the second end of the stator winding is accommodated in the second accommodating cavity.

2. The motor stator according to claim 1, characterized in that: There are a plurality of stator slots, which are spaced apart along the circumference of the stator core. The insulating sleeve includes a plurality of sleeves, which are spaced apart along the circumference of the stator core. One sleeve is inserted into each of the stator slots, and each sleeve is provided with the first cooling channel.

3. The motor stator according to claim 1, characterized in that: The insulating sleeve is integrally arranged.

4. The motor stator according to claim 1, characterized in that: The motor stator further comprises a first sealing ring and a second sealing ring, wherein the first sealing ring abuts between the inner wall of the first sealing cover and the first end of the stator core, and the second sealing ring abuts between the inner wall of the second sealing cover and the second end of the stator core.

5. The motor stator according to claim 4, characterized in that: The insulating sleeve is provided with a first convex edge and a second convex edge around the circumference of the stator core, and the first convex edge and the second convex edge are respectively provided at two ends of the insulating sleeve along the axial direction of the stator core; The first sealing cover is provided with a third flange around the circumference of the stator core, the second sealing cover is provided with a fourth flange around the circumference of the stator core, the third flange is located at the first end of the stator core, the fourth flange is located at the second end of the stator core, the first flange and the third flange are spaced apart in the radial direction of the stator core, and the second flange and the fourth flange are spaced apart in the radial direction of the stator core; The first sealing ring is disposed between the first protrusion and the third protrusion, and the second sealing ring is disposed between the second protrusion and the fourth protrusion.

6. The motor stator according to claim 5, characterized in that: The stator slots are provided in plurality, and the plurality of stator slots are arranged at intervals along the circumferential direction of the stator core; the insulating sleeve comprises a plurality of sleeves, and the plurality of sleeves are arranged along the circumferential direction of the stator core; one sleeve is inserted into each of the stator slots, and each of the sleeves is provided with the first cooling channel; The first protrusion is connected to the same end of the plurality of sleeves, and the second protrusion is connected to the other end of the plurality of sleeves.

7. The motor stator according to claim 1, characterized in that: A second cooling channel is provided inside the stator core and / or between the outer wall of the stator core and the inner wall of the casing, and the second cooling channel communicates with the first accommodating cavity and the second accommodating cavity.

8. The motor stator according to claim 7, characterized in that: The second cooling channel is disposed in the stator core, the second cooling channel extends along the axial direction of the stator core, and the second cooling channel passes through the first end and the second end of the stator core.

9. The motor stator according to claim 7, characterized in that: A cooling groove is provided on the inner wall of the housing, and the groove wall of the cooling groove and the outer wall of the stator core form the second cooling channel.

10. The motor stator according to claim 7 or 9, characterized in that: A plurality of the second cooling channels are provided, and the plurality of the second cooling channels are arranged along the circumferential direction of the stator core.

11. The motor stator according to claim 1, characterized in that: The stator core comprises a plurality of stacked magnetic conductive sheets, and an adhesive layer is provided between two adjacent magnetic conductive sheets.

12. The motor stator according to claim 1, characterized in that: The stator core includes a plurality of stacked magnetic conductive sheets, the magnetic conductive sheets include a first magnetic conductive sheet and a second magnetic conductive sheet, the first magnetic conductive sheet includes a first sheet body and a second sheet body which are separately arranged, the second magnetic conductive sheet includes a third sheet body and a fourth sheet body which are separately arranged, a first lug is provided at one end of the first sheet body, the second sheet body is provided with a second lug, the third sheet body is provided with a third lug, and the fourth sheet body is provided with a fourth lug, the first lug is connected to the third lug via a first connecting member, and the second lug is connected to the fourth lug via a second connecting member.

13. A motor, characterized in that: The invention comprises a motor stator as claimed in any one of claims 1 to 12.

14. A powertrain, characterized in that: Comprising the motor as claimed in claim 13.

15. A vehicle, characterized in that: Comprising the electric machine as claimed in claim 13 or the powertrain as claimed in claim 14.

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