Motor stator, motor and vehicle

Abstract

The invention relates to a motor stator, a motor and a vehicle, the motor stator comprises a stator core, the stator core is provided with a plurality of mounting grooves arranged at intervals along the circumferential direction, and the mounting grooves extend along the axial direction of the stator core; the insulating layer is attached to the inner side of the mounting groove in the circumferential direction to form a first cooling flow channel extending in the same direction as the mounting groove, and a first liquid inlet and a first liquid outlet are formed in the first cooling flow channel; and the winding is fixedly arranged in the first cooling flow channel, and a gap is formed between at least part of the winding and the insulating layer. The insulating layer is arranged in the mounting groove in the circumferential direction to form the first cooling flow channel, the winding is arranged in the first cooling flow channel, and a gap is formed between at least part of the winding and the insulating layer, so that cooling liquid flows between the winding and the insulating layer, and the cooling effect is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular, to a motor stator, a motor, and a vehicle. Background Art

[0002] The motor uses cooling oil as a cooling medium to dissipate heat from the stator winding of the motor. The stator winding is arranged in the stator core, and insulating paper is arranged between the stator winding and the stator core for insulation. In related technologies, the coolant is wrapped around the outside of the insulating paper, and the heat generated by the winding can only be conducted to the coolant through the insulating paper. However, the thermal conductivity of the insulating paper is extremely low, that is, the thermal resistance of this part is large, resulting in the internal temperature of the winding still being very high and the cooling effect being poor. Summary of the Invention

[0003] The purpose of the present disclosure is to provide a motor stator, a motor and a vehicle, which can solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned objectives, the present disclosure provides a motor stator, comprising: a stator core, on which a plurality of mounting slots are arranged at intervals along the circumferential direction, and the mounting slots extend along the axial direction of the stator core; an insulating layer, circumferentially fitted on the inner side of the mounting slots to form a first cooling channel extending in the same direction as the mounting slots, the first cooling channel being provided with a first liquid inlet and a first liquid outlet; and a winding, fixedly arranged in the first cooling channel, with at least a portion of the winding being spaced apart from the insulating layer.

[0005] Optionally, both ends of the first cooling channel extend axially out of the mounting groove.

[0006] Optionally, a liquid conducting groove is provided on the outer side of the stator core along the circumferential direction, and the liquid conducting groove is communicated with the first liquid inlet.

[0007] Optionally, the liquid guiding groove is arranged in the middle of the stator core in the axial direction.

[0008] Optionally, the stator core includes a first core lamination and a second core lamination, the second core lamination is relatively arranged on both sides of the first core lamination, and the outer diameter of the first core lamination is smaller than the outer diameter of the second core lamination to form the liquid guide groove.

[0009] Optionally, the stator core also includes a third core lamination, which is arranged between the first core lamination and the second core lamination and has an outer diameter the same as the outer diameter of the second core lamination. The third core lamination is provided with a liquid guide port and a connecting groove, the liquid guide port is arranged at intervals along the circumferential direction and is located within the range of the liquid guide groove to communicate with the liquid guide groove, one end of the connecting groove is communicated with the liquid guide port, and the other end is communicated with the mounting groove, the first liquid inlet is arranged at a position corresponding to the first cooling channel and the third core lamination and is communicated with the connecting groove, and the first liquid outlet is arranged at both ends of the first cooling channel.

[0010] Optionally, the mounting groove includes a first section arranged on the first core lamination, a second section arranged on the second core lamination, and a third section arranged on the third core lamination. The width of the first section and the second section is reduced at one end close to the liquid guide groove to form a card slot. The winding is clamped in the card slot and has a gap between it and the end of the card slot close to the liquid guide groove.

[0011] Optionally, two opposite sides of the first section and the second section extending in the radial direction are provided with protrusions extending toward the inner side of the installation groove, and the protrusions interfere with the winding.

[0012] Optionally, the stator core includes a yoke and a tooth portion, the mounting groove is arranged on the tooth portion, and the yoke is provided with a second cooling channel arranged at intervals along the circumference of the stator core, one end of the second cooling channel is connected to the liquid guide groove, and the other end extends along the axial direction of the stator core to the end of the stator core.

[0013] Optionally, a nozzle is provided at one end of the second cooling channel away from the liquid guiding groove, and the nozzle is inclined toward the end of the winding.

[0014] Optionally, the stator core further includes a fourth core lamination, and the nozzle is arranged on the fourth core lamination.

[0015] The second object of the present disclosure is to provide a motor, comprising: the above-mentioned motor stator, wherein a mounting cavity is provided at the center of the motor stator; a core shaft, extending along the axial direction of the stator core and with both ends extending out of the mounting cavity, a third cooling channel being provided in the core shaft, and a second liquid inlet and a second liquid outlet being provided on the third cooling channel; and a rotor core, circumferentially arranged on the outside of the core shaft, wherein the rotor core is arranged in the mounting cavity.

[0016] Optionally, a plurality of fourth cooling flow channels are arranged in the rotor core in a circumferential direction, the fourth cooling flow channels extend along an axial direction of the rotor core, the fourth cooling flow channels are arranged with the magnetic steel, opposite sides of the rotor core extending along the axial direction are respectively provided with a first magnetic shield plate and a second magnetic shield plate, the first magnetic shield plate and the second magnetic shield plate are arranged with cooling cavities in communication with the fourth cooling flow channels, and the cooling cavities are arranged with a third liquid inlet and a third liquid outlet.

[0017] Optionally, the second liquid inlet is arranged at an end of the third cooling flow channel, and the second liquid outlet is arranged at a side of the third cooling flow channel and in communication with the third liquid inlet on the first magnetic shield plate and the second magnetic shield plate.

[0018] Optionally, the cooling cavities include first cavities and second cavities arranged in a circumferential direction, the third liquid inlet is arranged on the first cavities, the third liquid outlet is arranged on the second cavities, the first cavities on the first magnetic shield plate are arranged opposite the second cavities on the second magnetic shield plate, and the second cavities on the first magnetic shield plate are arranged opposite the first cavities on the second magnetic shield plate.

[0019] Optionally, the third liquid outlet is arranged to be inclined towards an end of the winding.

[0020] Optionally, the motor further includes a housing, the motor stator is arranged in the housing, the housing is arranged with a fourth liquid outlet, a fourth liquid inlet in communication with the first liquid inlet, and a fifth liquid inlet in communication with the second liquid inlet.

[0021] A third object of the present disclosure is to provide a vehicle, comprising the motor described above.

[0022] Through the above technical solution, the insulating layer is arranged in the mounting groove in a circumferential direction to form the first cooling flow channel, the winding is arranged in the first cooling flow channel, and there is a gap between at least part of the winding and the insulating layer, so that the cooling liquid flows between the winding and the insulating layer, thereby increasing the cooling effect.

[0023] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0025] Figure 1 is a structural schematic view of a motor stator in the present disclosure;

[0026] Figure 2 is an exploded view of the stator core of the present disclosure;

[0027] Figure 3 is a schematic structural diagram of the third core lamination in the present disclosure;

[0028] Figure 4 is a schematic diagram of the installation of the insulation layer in the present disclosure;

[0029] Figure 5 is a schematic structural diagram of the insulating layer in the present disclosure;

[0030] Figure 6 is an exploded view of the insulation layer in the present disclosure;

[0031] Figure 7 is a cross-sectional view of the stator core of the present disclosure;

[0032] Figure 8 yes Figure 7 A partial enlarged view of point A in the middle;

[0033] Figure 9 is a side view of the wire-outlet end portion of the stator core in the present disclosure;

[0034] Figure 10 yes Figure 9 The main view;

[0035] Figure 11 is a side view of the liquid guide groove portion of the present disclosure;

[0036] Figure 12 yes Figure 11 The main view;

[0037] Figure 13 is a longitudinal cross-sectional view of the motor rotor in the present disclosure;

[0038] Figure 14 is a transverse cross-sectional view of the motor rotor in the present disclosure;

[0039] Figure 15 is a schematic structural diagram of the second magnetic isolation plate in the present disclosure;

[0040] Figure 16 It is a structural schematic diagram of the motor in the present disclosure.

[0041] Description of Reference Numerals

[0042] 1. stator core; 101. first core lamination; 102. second core lamination; 103. third core lamination; 1031. connecting slot; 104. fourth core lamination; 105. yoke; 106. tooth;

[0043] 2. Mounting slot; 21. First section; 22. Second section; 23. Third section; 24. Fourth section; 25. Card slot;

[0044] 3. Liquid guide groove; 4. Liquid guide port; 5. Second cooling channel; 51. Nozzle; 6. Insulation layer; 61. First cooling channel; 62. First liquid inlet; 63. First liquid outlet; 7. Winding; 8. Protrusion; 9. Mandrel; 10. Rotor core; 11. First magnetic shielding plate; 12. Second magnetic shielding plate;

[0045] 13. Third cooling channel; 131. Second liquid inlet; 132. Second liquid outlet;

[0046] 14. Fourth cooling channel; 15. Magnetic steel;

[0047] 16. Cooling cavity; 161. First cavity; 162. Second cavity; 163. Third liquid inlet; 164. Third liquid outlet;

[0048] 17. Shell; 171. Fourth liquid inlet; 172. Fifth liquid inlet; 173. Fourth liquid outlet. DETAILED DESCRIPTION

[0049] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0050] In this disclosure, unless otherwise indicated, directional terms such as "inside" and "outside" refer to the inside and outside relative to the outline of a component or structure. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not imply order or importance. Furthermore, in the description with reference to the accompanying drawings, the same reference numerals in different drawings represent the same element.

[0051] like Figure 1-12 As shown, the present disclosure provides a motor stator, including: a stator core 1, on which a plurality of mounting slots 2 are arranged at intervals along the circumferential direction, and the mounting slots 2 extend along the axial direction of the stator core 1; an insulating layer 6, which is circumferentially fitted on the inner side of the mounting slot 2 to form a first cooling channel 61 extending in the same direction as the mounting slot 2, and the first cooling channel 61 is provided with a first liquid inlet 62 and a first liquid outlet 63; and a winding 7, which is fixedly arranged in the first cooling channel 61, and at least part of the winding 7 is spaced apart from the insulating layer 6.

[0052] Through the above technical solution, the insulating layer 6 is circumferentially arranged within the mounting groove 2 to form a first cooling channel 61. The winding 7 is disposed within the first cooling channel 61, and a gap is provided between at least a portion of the winding 7 and the insulating layer 6, allowing coolant to flow between the winding 7 and the insulating layer 6, thereby enhancing the cooling effect. For example, one end of the winding 7 is welded to the mounting groove 2, and the other end is clamped to secure the winding 7, preventing it from shaking and maintaining a gap between the winding 7 and the insulating layer 6. The insulating layer 6 is made of insulating paper, which provides insulation and sealing, preventing the coolant from flowing out of the side of the mounting groove 2.

[0053] As an optional implementation, Figure 9 As shown, both ends of the first cooling channel 61 extend axially out of the mounting slot 2 to cool the ends of the winding 7 and increase the cooling area.

[0054] As an optional implementation, Figure 1 As shown, a liquid guide groove 3 is provided on the outer side of the stator core 1 along the circumferential direction. The liquid guide groove 3 is connected to the first liquid inlet 62. The liquid guide groove 3 is arranged along the circumferential direction, and the coolant enters the liquid guide groove 3. In this way, the coolant can enter multiple first cooling channels 61 at the same time to provide cooling for multiple first cooling channels 61.

[0055] Alternatively, as Figure 1 As shown, the liquid guide groove 3 is arranged in the middle of the stator core 1 in the axial direction. The coolant entering the liquid guide groove 3 flows to both sides, cooling the windings 7 and the stator core 1 on both sides at the same time, reducing the coolant stroke and increasing the cooling effect.

[0056] Alternatively, as Figure 2 As shown, the stator core 1 includes a first core lamination 101 and a second core lamination 102. The second core lamination 102 is relatively arranged on both sides of the first core lamination 101. The outer diameter of the first core lamination 101 is smaller than the outer diameter of the second core lamination 102 to form a liquid guide groove 3. The second core lamination 102 with a larger outer diameter is bonded to the outer side of the first core lamination 101 with a smaller outer diameter to form an inwardly concave liquid guide groove 3. The first core lamination 101 and the second core lamination 102 are manufactured separately for easy processing.

[0057] Alternatively, as Figure 2-6 and Figure 11-12As shown, the stator core 1 also includes a third core lamination 103, which is arranged between the first core lamination 101 and the second core lamination 102 and has an outer diameter that is the same as the outer diameter of the second core lamination 102. The third core lamination 103 is provided with a liquid guide port 4 and a connecting groove 1031. The liquid guide ports 4 are arranged at intervals along the circumferential direction and are located within the range of the liquid guide groove 3 to communicate with the liquid guide groove 3. That is, the liquid guide ports 4 are located on both side walls of the liquid guide groove 3, one end of the connecting groove 1031 is connected to the liquid guide port 4, and the other end is connected to the mounting groove 2. The first The liquid inlet 62 is arranged at a position corresponding to the first cooling channel 61 and the third core lamination 103 and is connected to the connecting groove 1031, that is, the first liquid inlet 62 is arranged on the side of the first cooling channel 61 close to the connecting groove 1031, and the first liquid outlet 63 is arranged at both ends of the first cooling channel 61. The coolant in the liquid guide groove 3 enters the liquid guide port 4, and enters the installation groove 2 through the connecting groove 1031, and then enters the first cooling channel 61 from the first liquid inlet 62. The coolant flows along the first cooling channel 61 and is sprayed out from the first liquid outlet 63 at both ends.

[0058] Alternatively, as Figure 2 and Figure 7-8 As shown, the mounting groove 2 includes a first section 21 arranged on the first core lamination 101, a second section 22 arranged on the second core lamination 102, and a third section 23 arranged on the third core lamination 103. The width of the first section 21 and the second section 22 is reduced near the end of the liquid guide groove 3 to form a card slot 25. The winding 7 is clamped in the card slot 25 and there is a gap between the end of the card slot 25 near the liquid guide groove 3. The winding 7 is clamped in the card slot 25 to further position the winding 7. There is a gap between the winding 7 and the card slot 25 for coolant to flow through. The third section 23 is mainly used to connect with the liquid guide port 4 for liquid supply, so the card slot 25 is not provided on the third section 23 to increase the liquid supply area.

[0059] Alternatively, as Figure 2 and Figure 7-8As shown, the first section 21 and the second section 22 are provided with protrusions 8 extending toward the inner side of the mounting groove 2 on opposite sides extending radially. The protrusions 8 are in contact with the winding 7. The protrusions 8 are used to further support and position the winding 7. By positioning with the protrusions 8, there is a gap between the other parts of the winding 7 and the insulating layer 6 for the coolant to flow through, thereby increasing the cooling area. No protrusions 8 are provided in the third section 23 located on the third core lamination 103. The coolant can completely enter the third section 23, and then enter the first section 21 and the second section 22 axially from the third section 23 without being blocked by the protrusions 8. The insulating layer 6 is folded with a crease corresponding to the protrusion 8 so that the insulating layer 6 is completely fitted with the inner wall of the mounting groove 2, and the crease can play a role in fixing the insulating layer 6. High-temperature resistant epoxy glue can be applied between the insulating layer 6 and the mounting groove 2 to further fix the insulating layer 6 to the inner wall of the mounting groove 2. Because there is no protrusion 8 on the third section 23, the portion of the insulating layer 6 corresponding to the third section 23 has no crease, and a first liquid inlet 62 is provided on this portion. In order to facilitate the processing and manufacturing of the insulating layer 6, the insulating layer 6 can be provided in sections, such as Figure 6 shown.

[0060] As an optional implementation, Figure 1-2 and Figure 7-10 As shown, the stator core 1 includes a yoke 105 and a tooth portion 106, and the mounting groove 2 is provided on the tooth portion 106. The yoke 105 is provided with a second cooling channel 5 arranged at intervals along the circumference of the stator core 1. One end of the second cooling channel 5 is connected to the liquid guide groove 3, and the other end extends along the axial direction of the stator core 1 to the end of the stator core 1. The yoke 105 is provided with a second cooling channel 5 for cooling the yoke 105. The coolant enters the second cooling channel 5 from the liquid guide groove 3 to cool the stator core 1.

[0061] Alternatively, as Figure 9-10 As shown, a nozzle 51 is provided at one end of the second cooling channel 5 away from the liquid guide groove 3, and the nozzle 51 is inclined toward the end of the winding 7, for example, the inclination angle is 45°. The coolant in the second cooling channel 5 is sprayed out from the nozzle 51 and sprayed to the end of the winding 7 to cool the end of the winding 7.

[0062] Alternatively, as Figure 2 As shown, the stator core 1 also includes a fourth core lamination 104, and the nozzle 51 is arranged on the fourth core lamination. The nozzle 51 is arranged on the fourth core lamination 104 to facilitate processing and manufacturing. Of course, the fourth core lamination is provided with a fourth section 24 of the mounting groove 2, and the fourth section 24 is connected to the second section 22. The fourth section 24 is provided with a protrusion 8 and a slot 25.

[0063] like Figure 13-16As shown, the second object of the present disclosure is to provide a motor, comprising: the above-mentioned motor stator, a mounting cavity is provided in the center of the motor stator; a core shaft 9, extending along the axial direction of the stator core 1 and extending out of the mounting cavity at both ends, a third cooling channel 13 is provided in the core shaft 9, and a second liquid inlet 131 and a second liquid outlet 132 are provided on the third cooling channel 13; and a rotor core 10, which is circumferentially arranged on the outside of the core shaft 9 and rotates synchronously with the core shaft 9, the rotor core 10 is arranged in the mounting cavity, and a third cooling channel 13 is provided in the core shaft 9 to cool the core shaft 9.

[0064] Alternatively, as Figure 13-15 As shown, a plurality of fourth cooling channels 14 are provided in the rotor core 10 at intervals along the circumferential direction. The fourth cooling channels 14 extend along the axial direction of the rotor core 10. A magnet 15 is provided in the fourth cooling channel 14. For example, part of the fourth cooling channel 14 contacts the magnet 15 to position the magnet 15, so that there is a gap between the magnet 15 and the inner wall of the fourth cooling channel 14 for the coolant to flow through. A first magnetic isolation plate 11 and a second magnetic isolation plate 12 are provided on opposite sides of the axial extension of the rotor core 10 respectively. The first magnetic isolation plate 11 and the second magnetic isolation plate 12 rotate synchronously with the core shaft 9, for example, are connected to the core shaft 9 through a positioning pin. A cooling cavity 16 connected to the fourth cooling channel 14 is provided in the first magnetic isolation plate 11 and the second magnetic isolation plate 12, and a third liquid inlet 163 and a third liquid outlet 164 are provided on the cooling cavity 16. The function of the magnet 15 is to generate a magnetic field, which is a necessary condition for the normal operation of the motor. It can convert electrical energy into mechanical energy to enable the motor to operate. The first magnetic isolation plate 11 and the second magnetic isolation plate 12 are arranged on both sides of the rotor core 10 to isolate the magnetic field. The coolant enters the cooling cavity 16 from the third liquid inlet 163, and then enters the fourth cooling channel 14 to cool the magnet 15 and the rotor core 10.

[0065] Alternatively, as Figure 13 As shown, the second liquid inlet 131 is arranged at the end of the third cooling channel 13, the second liquid outlet 132 is arranged on the side of the third cooling channel 13 and is connected to the third liquid inlet 163 on the first magnetic isolation plate 11 and the second magnetic isolation plate 12, and two groups of second liquid outlets 132 are arranged at axial intervals along the third cooling channel 13 to correspond to the third liquid inlets 163 on the first magnetic isolation plate 11 and the second magnetic isolation plate 12 respectively, and multiple third liquid inlets 163 are arranged at circumferential intervals, and each group of second liquid outlets 132 is provided with multiple third liquid inlets 163 to correspond to multiple third liquid inlets 163.

[0066] Alternatively, as Figure 15As shown, the cooling cavity 16 includes a first cavity 161 and a second cavity 162 arranged at intervals along the circumferential direction, a third liquid inlet 163 is opened on the first cavity 161, and a third liquid outlet 164 is opened on the second cavity 162. The first cavity 161 located on the first magnetic isolation plate 11 is opposite to the second cavity 162 located on the second magnetic isolation plate 12. The second cavity 162 located on the first magnetic isolation plate 11 is opposite to the first cavity 161 located on the second magnetic isolation plate 12. The first magnetic isolation plate 11 and the second magnetic isolation plate 12 have the same structure, but when installing, the second magnetic isolation plate 12 needs to be rotated a certain angle so that the second magnetic isolation plate 12 on the second magnetic isolation plate 12 is opposite to the first magnetic isolation plate 11. The cavity 162 corresponds to the first cavity 161 on the first magnetic isolation plate 11, that is, the coolant enters the first cavity 161 from the third liquid inlet 163 on the first magnetic isolation plate 11, and then enters the second cavity 162 in the second magnetic isolation plate 12 through the fourth cooling channel 14, and is ejected from the third liquid outlet 164 on the second magnetic isolation plate 12. The same is true on the other side. The coolant enters from the third liquid inlet 163 on the second magnetic isolation plate 12 and is ejected from the third liquid outlet 164 on the first magnetic isolation plate 11. This arrangement can ensure that the coolant enters from one side and is ejected from the other side, and will not enter from both sides of the same channel at the same time, causing coolant conflict.

[0067] Optionally, the third liquid outlet 164 is tilted toward the end of the winding 7 , for example, at an angle of 45°, so that the coolant is sprayed to the end of the winding 7 to cool the end of the winding 7 .

[0068] Alternatively, as Figure 16 As shown, the motor also includes a housing 17, and the motor stator is arranged in the housing 17. The housing 17 is provided with a fourth liquid outlet 173, a fourth liquid inlet 171 connected to the first liquid inlet 62, and a fifth liquid inlet 172 connected to the second liquid inlet 131. The two ends of the core shaft 9 are rotatably connected to the housing 17 through bearings. The stator core 1 is fixedly arranged on the inner wall of the housing 17, and the liquid guide groove 3 and the inner wall of the housing 17 are enclosed to form a closed chamber. The coolant enters the liquid guide groove 3 from the fourth liquid inlet 171 on the housing 17 and enters the third cooling channel 13 from the fifth liquid inlet 172. The cooled coolant flows into the interior of the housing 17 and flows out from the fourth liquid outlet 173.

[0069] The third object of the present disclosure is to provide a vehicle, comprising: the above-mentioned motor, which has a good heat dissipation effect and can avoid vehicle failure caused by excessive motor temperature.

[0070] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0071] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0072] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A motor stator, characterized in that: include: A stator core, wherein the stator core is provided with a plurality of mounting slots spaced apart along the circumferential direction, and the mounting slots extend along the axial direction of the stator core; an insulating layer, circumferentially arranged on the inner side of the mounting groove to form a first cooling channel extending in the same direction as the mounting groove, wherein the first cooling channel is provided with a first liquid inlet and a first liquid outlet; and The winding is fixedly arranged in the first cooling channel, and at least a portion of the winding is spaced from the insulating layer.

2. The motor stator according to claim 1, characterized in that: Both ends of the first cooling channel extend axially out of the mounting groove.

3. The motor stator according to claim 1, characterized in that: A liquid guide groove is provided on the outer side of the stator core along the circumferential direction, and the liquid guide groove is communicated with the first liquid inlet.

4. The motor stator according to claim 3, characterized in that: The liquid guiding groove is arranged in the middle of the stator core in the axial direction.

5. The motor stator according to claim 4, characterized in that: The stator core includes a first core lamination and a second core lamination. The second core lamination is relatively arranged on both sides of the first core lamination. The outer diameter of the first core lamination is smaller than the outer diameter of the second core lamination to form the liquid guide groove.

6. The motor stator according to claim 5, characterized in that: The stator core also includes a third core lamination, which is arranged between the first core lamination and the second core lamination and has an outer diameter that is the same as the outer diameter of the second core lamination. The third core lamination is provided with a liquid guide port and a connecting groove. The liquid guide ports are arranged at intervals along the circumferential direction and are located within the range of the liquid guide groove so as to communicate with the liquid guide groove. One end of the connecting groove is communicated with the liquid guide port, and the other end is communicated with the mounting groove. The first liquid inlet is provided at a position corresponding to the first cooling channel and the third core lamination and is communicated with the connecting groove. The first liquid outlet is provided at both ends of the first cooling channel.

7. The motor stator according to claim 6, characterized in that: The mounting groove includes a first section arranged on the first core lamination, a second section arranged on the second core lamination, and a third section arranged on the third core lamination. The width of the first section and the second section at one end close to the liquid guide groove is reduced to form a card slot. The winding is clamped in the card slot and there is a gap between the winding and the end of the card slot close to the liquid guide groove.

8. The motor stator according to claim 7, characterized in that: Two opposite sides of the first section and the second section extending in the radial direction are provided with protrusions extending toward the inner side of the installation groove, and the protrusions are in contact with the winding.

9. The motor stator according to claim 3, characterized in that: The stator core includes a yoke and a tooth portion, the mounting groove is arranged on the tooth portion, and the yoke is provided with a second cooling channel arranged at intervals along the circumference of the stator core. One end of the second cooling channel is connected to the liquid guide groove, and the other end extends along the axial direction of the stator core to the end of the stator core.

10. The motor stator according to claim 9, characterized in that: A nozzle is provided at one end of the second cooling channel away from the liquid guide groove, and the nozzle is inclined toward the end of the winding.

11. The motor stator according to claim 10, characterized in that: The stator core further includes a fourth core lamination, and the nozzle is arranged on the fourth core lamination.

12. A motor, characterized in that: include: The motor stator according to any one of claims 1 to 11, wherein a mounting cavity is provided at the center of the motor stator; a core shaft extending along the axial direction of the stator core and with both ends extending out of the mounting cavity, wherein a third cooling channel is provided in the core shaft and a second liquid inlet and a second liquid outlet are provided on the third cooling channel; as well as The rotor core is circumferentially arranged outside the core shaft, and the rotor core is arranged in the installation cavity.

13. The motor according to claim 12, characterized in that A plurality of fourth cooling channels are circumferentially spaced apart in the rotor core, and the fourth cooling channels extend axially along the rotor core. Magnets are provided in the fourth cooling channels, and a first magnetic isolation plate and a second magnetic isolation plate are respectively provided on opposite sides of the rotor core extending axially. A cooling cavity connected to the fourth cooling channel is provided in the first magnetic isolation plate and the second magnetic isolation plate, and a third liquid inlet and a third liquid outlet are provided in the cooling cavity.

14. The motor according to claim 13, characterized in that The second liquid inlet is arranged at the end of the third cooling channel, and the second liquid outlet is arranged at the side of the third cooling channel and is connected to the third liquid inlets on the first magnetic isolation plate and the second magnetic isolation plate.

15. The motor according to claim 14, characterized in that The cooling cavity includes a first cavity and a second cavity arranged at intervals along the circumferential direction, the third liquid inlet is opened on the first cavity, and the third liquid outlet is opened on the second cavity. The first cavity located on the first magnetic isolation plate is arranged opposite to the second cavity located on the second magnetic isolation plate, and the second cavity located on the first magnetic isolation plate is arranged opposite to the first cavity located on the second magnetic isolation plate.

16. The motor according to claim 13, characterized in that The third liquid outlet is arranged obliquely toward the end of the winding.

17. The motor according to claim 12, characterized in that The motor further includes a housing, the motor stator is disposed in the housing, and the housing is provided with a fourth liquid outlet, a fourth liquid inlet communicated with the first liquid inlet, and a fifth liquid inlet communicated with the second liquid inlet.

18. A vehicle, characterized in that: include: The motor according to any one of claims 12 to 17.

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