Stator assembly, motor and vehicle

Abstract

The invention relates to a stator assembly, a motor and a vehicle. The stator assembly comprises a stator core and a cooling oil ring. The stator core is internally provided with a plurality of cooling channels, the plurality of cooling channels are arranged at intervals along the circumferential direction of the stator core, the cooling channels extend along the axial direction of the stator core, the cooling oil ring is arranged at the end part of the stator core, and the cooling oil ring and the stator core are coaxially arranged. The cooling oil ring is provided with a plurality of oil inlet channels and a plurality of oil outlet channels, the oil inlet channels and the oil outlet channels are alternately arranged in the circumferential direction of the cooling oil ring, and the oil inlet channels and the oil outlet channels communicate with the cooling channel. The stator assembly is reasonable in structural design and good in heat dissipation effect.

Description

Technical Field

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

[0002] With the continuous development of new energy vehicles and the gradual increase in market demand for the driving capabilities of new energy vehicles, the drive motors of new energy vehicles need to continuously improve their speed, torque density and power density while gradually compressing their volume. The higher the speed, torque density and power density of the motor, the higher the heat it generates. Therefore, the heat dissipation and cooling structure of the motor are essential for the reliable, stable and efficient operation of the motor. The cooling of the motor can be divided into air cooling, water cooling and oil cooling.

[0003] Traditional motor cooling mostly uses water cooling, and a very small number of low-performance motors use economical air cooling. However, since the water cooling solution is indirect cooling, the cooling water cannot directly contact the heat dissipation parts, which has certain defects. However, the oil cooling solution is becoming the first choice for high-performance motor cooling solutions due to its natural electrical insulation and high degree of freedom in structural design.

[0004] In the related art, manufacturers usually arrange oil pipes or oil collecting plates near the top of the motor stator and the end of the winding, and set oil spray holes on the oil pipes or oil collecting plates, and the cooling oil is sprayed from the oil spray holes to the end of the emergency winding outside the stator core. However, after the oil is sprayed to the top of the stator core, the oil flows along the outer surface of the stator core to the bottom of the stator core under the action of gravity. The flowing oil cannot cover the entire area of ​​the outer surface of the stator core, and the flow speed is low, and the windings at both ends of the stator core cannot be fully cooled. Therefore, the cooling structure design of the motor in the related art is unreasonable, resulting in poor heat dissipation effect of the motor. Summary of the invention

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an embodiment of the present invention provides a stator assembly with reasonable structural design and good heat dissipation effect.

[0007] An embodiment of the present invention further provides a motor.

[0008] An embodiment of the present invention further provides a vehicle.

[0009] The stator assembly of an embodiment of the present invention includes: a stator core, wherein a plurality of cooling channels are arranged in the stator core at intervals along the circumference of the stator core, and the cooling channels extend along the axial direction of the stator core; a cooling oil ring, wherein the cooling oil ring is arranged at the end of the stator core and coaxially with the stator core, wherein a plurality of oil inlet channels and a plurality of oil outlet channels are arranged on the cooling oil ring, wherein the plurality of oil inlet channels and the plurality of oil outlet channels are alternately arranged along the circumference of the cooling oil ring, and the oil inlet channels and the oil outlet channels are both connected to the cooling channels.

[0010] According to the stator assembly of the embodiment of the present invention, since the cooling oil ring is alternately arranged with multiple oil inlet channels and multiple oil outlet channels in the circumferential direction, and the oil inlet channels, oil outlet channels and cooling channels are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core can be fully and evenly cooled. On the other hand, since the cooling oil ring is arranged at the end of the stator core, the end position of the stator core and the end position of the winding can be conveniently cooled, and the uniformity during cooling is good. Therefore, the structural design of the stator assembly of the embodiment of the present invention is reasonable, and the stator core and the winding can be fully and evenly cooled, thereby improving the heat dissipation effect of the stator core.

[0011] In some embodiments, the cooling oil ring includes a first oil ring and a second oil ring, the first oil ring and the second oil ring are respectively arranged at two ends of the stator core in the axial direction, the first oil ring is provided with a plurality of first oil inlet channels and a plurality of first oil outlet channels, the second oil ring is provided with a plurality of second oil inlet channels and a plurality of second oil outlet channels, the first oil inlet channel is connected to the second oil inlet channel through the corresponding cooling channel, the second oil inlet channel is connected to the second oil outlet channel, and the second oil outlet channel is connected to the first oil outlet channel through the corresponding cooling channel.

[0012] In some embodiments, a first oil injection hole is provided on the inner circumferential wall of the first oil ring, and the first oil injection hole is connected to the first oil outlet channel; and / or a second oil injection hole is provided on the inner circumferential wall of the second oil ring, and the second oil injection hole is connected to the second oil outlet channel.

[0013] In some embodiments, a plurality of oil spray holes are provided on the inner wall of the cooling oil ring, the plurality of oil spray holes are arranged at intervals along the circumference of the cooling oil ring, and the plurality of oil spray holes correspond one-to-one to and are connected with the plurality of oil outlet channels.

[0014] In some embodiments, the length direction of the cooling channel is arranged parallel to the axial direction of the stator core; or, the cooling channel is spirally wrapped around the stator core; or, the cooling channel is arranged in a winding manner on the stator core.

[0015] In some embodiments, the stator core includes a plurality of core punching sheets, which are stacked to form the stator core. The core punching sheets are provided with through holes, and the through holes of the plurality of core punching sheets are connected in series to form the cooling channel.

[0016] In some embodiments, a plug-in column is provided on the cooling oil ring, and a matching hole is provided at the end of the stator core, and the plug-in column is inserted into the matching hole.

[0017] In some embodiments, the stator assembly further includes a winding, wherein the winding is disposed on the stator core, an end of the winding protrudes from the stator core along the axial direction of the stator core, and the cooling oil ring is sleeved on the end of the winding.

[0018] In some embodiments, a cross-sectional area of ​​the oil inlet passage along an axial direction orthogonal to the stator core is equal to a cross-sectional area of ​​the oil outlet passage along an axial direction orthogonal to the stator core.

[0019] According to another embodiment of the present invention, a motor comprises: a motor housing, on which an oil inlet is provided; a stator assembly, which is the stator assembly described in any one of the embodiments of the present invention, and is arranged in the motor housing, and the oil inlet is connected to the oil inlet channel.

[0020] According to the motor of the embodiment of the present invention, since the cooling oil ring is alternately arranged with multiple oil inlet channels and multiple oil outlet channels in the circumferential direction, and the oil inlet channels, oil outlet channels and cooling channels are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core can be fully and evenly cooled. On the other hand, since the cooling oil ring is arranged at the end of the stator core, the end position of the stator core and the end position of the winding can be conveniently cooled, and the uniformity during cooling is good. Therefore, the structural design of the stator assembly of the motor of the embodiment of the present invention is reasonable, so that the stator core and the winding can be fully and evenly cooled, the heat dissipation effect of the motor is improved, and the risk of high temperature aging failure of the insulation of the motor system can be effectively reduced, and the power density and torque density of the motor can be improved.

[0021] In some embodiments, an annular groove is provided on the outer peripheral wall of the cooling oil ring, the annular groove is located on the side of the cooling oil ring away from the stator core, and the annular groove is connected to the plurality of oil inlet channels, and the oil inlet is connected to the annular groove.

[0022] In some embodiments, a first groove is formed on the outer wall of the cooling oil ring, and the first groove and the inner wall of the motor housing define the oil inlet channel, or a second groove is formed on the outer wall of the cooling oil ring, and the second groove and the inner wall of the motor housing define the oil outlet channel.

[0023] A vehicle according to another embodiment of the present invention includes the stator assembly or the motor according to the embodiment of the present invention.

[0024] According to the vehicle of the embodiment of the present invention, since the cooling oil ring in the motor is alternately arranged with multiple oil inlet channels and multiple oil outlet channels in the circumferential direction, and the oil inlet channels, oil outlet channels and cooling channels are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core can be fully and evenly cooled. On the other hand, since the cooling oil ring is arranged at the end of the stator core, the end position of the stator core and the end position of the winding can be conveniently cooled, and the uniformity during cooling is good. Therefore, the motor structure design of the vehicle of the embodiment of the present invention is reasonable, and the stator core and winding can be fully and evenly cooled, thereby improving the heat dissipation effect of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an isometric view of a stator assembly according to an embodiment of the present invention.

[0026] Figure 2 is a cross-sectional view of a motor according to an embodiment of the present invention.

[0027] Figure 3 It is a partial schematic diagram of a stator assembly according to an embodiment of the present invention.

[0028] Figure 4 4 is a front view of a stator assembly according to an embodiment of the present invention.

[0029] Figure 5 Schematic diagram of a first oil ring of a stator assembly according to an embodiment of the present invention.

[0030] Figure 6 Schematic diagram of a second oil ring of a stator assembly according to an embodiment of the present invention.

[0031] Figure 7 Schematic diagram of a second oil ring of a stator assembly according to another embodiment of the present invention.

[0032] Figure 8 Schematic diagram of a second oil ring of a stator assembly according to another embodiment of the present invention.

[0033] Fig. 9 Schematic diagram of a cooling channel of a stator core of a stator assembly according to an embodiment of the present invention.

[0034] Fig.10 It is a schematic diagram of the cooling process of the stator assembly according to an embodiment of the present invention.

[0035] Fig.11 It is a schematic diagram of the cooling process of a stator assembly according to another embodiment of the present invention.

[0036] Reference numerals:

[0037] 10. Stator assembly;

[0038] 1. stator core; 11. core punching sheet; 12. cooling channel; 121. through hole;

[0039] 2. Cooling oil ring; 21. First oil ring; 22. Second oil ring; 23. Oil inlet channel; 231. First oil inlet channel; 2311. First groove; 232. Second oil inlet channel; 2321. Second convex block; 24. Oil outlet channel; 241. First oil outlet channel; 2411. First convex block; 242. Second oil outlet channel; 2421. Second groove; 25. Oil injection hole; 251. First oil injection hole; 252. Second oil injection hole; 26. Connecting column; 27. Annular groove; 271. First annular groove; 272. Second annular groove;

[0040] 3. Winding;

[0041] 20. Motor housing; 201. Oil inlet. DETAILED DESCRIPTION

[0042] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0043] Please refer to the following Figures 1 to 11 A stator assembly 10 , a motor, and a vehicle according to embodiments of the present invention are described.

[0044] like Figures 1 to 11 As shown, the stator assembly 10 according to the embodiment of the present invention comprises: a stator core 1 and a cooling oil ring 2. A plurality of cooling channels 12 are arranged in the stator core 1, and the plurality of cooling channels 12 are arranged at intervals along the circumference of the stator core 1, and the cooling channels 12 are arranged along the axial direction of the stator core 1 (such as Figure 2 The cooling oil ring 2 is provided at the end of the stator core 1 and is coaxially arranged with the stator core 1. The cooling oil ring 2 is provided with a plurality of oil inlet channels 23 and a plurality of oil outlet channels 24. The plurality of oil inlet channels 23 and the plurality of oil outlet channels 24 are alternately arranged along the circumference of the cooling oil ring 2. The oil inlet channels 23 and the oil outlet channels 24 are both connected to the cooling channel 12.

[0045] It is understandable that if Figures 1 to 5As shown, a plurality of oil inlet channels 23 and a plurality of oil outlet channels 24 are alternately arranged along the circumference of the cooling oil ring 2, that is, an oil outlet channel 24 is provided between each two adjacent oil inlet channels 23, or an oil inlet channel 23 is provided between each two adjacent oil outlet channels 24. One oil inlet channel 23 or one oil outlet channel 24 may correspond to one or more cooling channels 12. In other words, the opening of the cooling channel 12 is located on the end face of the stator core 1, and when the cooling oil ring 2 is installed at the end of the stator core 1, the opening of the oil inlet channel 23 and the opening of the oil outlet channel 24 may be opposite to one or more cooling channels 12.

[0046] According to the stator assembly 10 of the embodiment of the present invention, since the cooling oil ring 2 is circumferentially arranged with multiple oil inlet channels 23 and multiple oil outlet channels 24, and the oil inlet channels 23, the oil outlet channels 24 and the cooling channels 12 are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core 1 can be fully and evenly cooled. On the other hand, since the cooling oil ring 2 is arranged at the end of the stator core 1, the end position of the stator core 1 and the end position of the winding 3 can be conveniently cooled, and the uniformity during cooling is good. Therefore, the structural design of the stator assembly 10 of the embodiment of the present invention is reasonable, and the stator core 1 and the winding 3 can be fully and evenly cooled, thereby improving the heat dissipation effect of the stator core 1.

[0047] Specifically, Figure 2 As shown, the stator assembly 10 also includes a winding 3, which is arranged on the stator core 1, and the end of the winding 3 protrudes from the stator core 1 along the axial direction of the stator core 1. The cooling oil ring 2 is sleeved on the end of the winding 3, so that the stator assembly 10 of the embodiment of the present invention can uniformly cool the stator core 1 and the end of the winding 3 at the same time, further improving the heat dissipation effect of the stator assembly 10.

[0048] In some embodiments, Figures 1 to 4 As shown, the cooling oil ring 2 can be arranged at one end of the stator core 1 (such as Figure 2 The cooling oil ring 2 may be arranged at the front end or rear end of the stator core 1, or at both ends of the stator core 1. In the embodiment of the present invention, the cooling oil ring 2 includes a first oil ring 21 and a second oil ring 22, which are arranged at both ends of the stator core 1 in the axial direction, respectively. The first oil ring 21 is provided with a plurality of first oil inlet channels 231 and a plurality of first oil outlet channels 241, and the second oil ring 22 is provided with a plurality of second oil inlet channels 232 and a plurality of second oil outlet channels 242. It can be understood that the plurality of first oil inlet channels 231 and the plurality of first oil outlet channels 241 are alternately arranged along the circumference of the first oil ring 21. The plurality of second oil inlet channels 232 and the plurality of second oil outlet channels 242 are alternately arranged along the circumference of the second oil ring 22.

[0049] like Figures 3 to 5 As shown, the first oil inlet channel 231 is connected to the second oil inlet channel 232 through the corresponding cooling channel 12, the second oil inlet channel 232 is connected to the second oil outlet channel 242, and the second oil outlet channel 242 is connected to the first oil outlet channel 241 through the corresponding cooling channel 12. For example, the first oil ring 21 is arranged at the front end of the stator core 1, and the second oil ring 22 is arranged at the rear end of the stator core 1. The cooling oil can be passed into the cooling channel 12 through the first oil inlet channel 231 of the first oil ring 21, and then the cooling oil moves along the length direction of the cooling channel 12 and flows out from the other end of the cooling channel 12, and the outflowing cooling oil can enter the second oil inlet channel 232 of the second oil ring 22. Since the second oil inlet channel 232 is connected to the second oil outlet channel 242 adjacent to it, the cooling oil can be discharged to the second oil ring 22 through the second oil outlet channel 242, and finally the cooling oil is returned to the first oil outlet channel 241 through another cooling channel 12. Therefore, the cooling oil flows in the first oil ring 21, the stator core 1 and the second oil ring 22, and the side wall and both ends of the stator core 1 and the two ends of the winding 3 can be fully and evenly cooled, thereby further improving the heat dissipation effect of the stator assembly 10.

[0050] Optionally, the cross-sectional area of ​​the oil inlet channel 23 along the axial direction perpendicular to the stator core 1 is equal to the cross-sectional area of ​​the oil outlet channel 24 along the axial direction perpendicular to the stator core 1, so that the flow rate consistency of the cooling oil in the oil inlet channel 23 and the oil outlet channel 24 is better, thereby improving the uniformity of cooling the stator assembly 10.

[0051] In some embodiments, Figure 5 As shown, a first oil injection hole 251 is provided on the inner peripheral wall of the first oil ring 21. The first oil injection hole 251 is opposite to and communicates with the first oil outlet channel 241 along the radial direction of the first oil ring 21. It can be understood that the cooling oil can be sprayed into the front end of the winding 3 through the first oil injection hole 251, thereby cooling the winding 3 and improving the heat dissipation effect of the winding 3. Figure 2 , Figure 4 and Figure 5 As shown, a first annular groove 271 is provided on the outer peripheral wall of the first oil ring 21 . The first annular groove 271 is located on a side of the first oil ring 21 away from the stator core 1 . The first annular groove 271 is communicated with the first oil inlet channel 231 .

[0052] Alternatively, if Figure 7 and Figure 8 As shown, the inner peripheral wall of the second oil ring 22 is provided with a second oil injection hole 252, and the second oil injection hole 252 is connected to the second oil outlet channel 242. It can be understood that the cooling oil can be sprayed into the rear end of the winding 3 through the second oil injection hole 252, thereby cooling the winding 3 and improving the heat dissipation effect of the winding 3.

[0053] In a specific embodiment, Figure 3 and Fig.10 As shown, the first oil ring 21 is provided with a first oil injection hole 251 on the inner circumferential wall, and the second oil ring 22 is not provided with a second oil injection hole 252. When the stator assembly 10 is cooled, the cooling oil can be passed into the cooling channel 12 through the first oil inlet channel 231 of the first oil ring 21, and then the cooling oil moves along the length direction of the cooling channel 12 and flows out from the other end of the cooling channel 12, and the outflowing cooling oil can enter the second oil inlet channel 232 of the second oil ring 22, and be discharged to the second oil ring 22 through the second oil outlet channel 242, and then the cooling oil flows back to the first oil outlet channel 241 through another cooling channel 12. Since the first oil ring 21 is provided with a first oil injection hole 251 on the inner circumferential wall, the cooling oil can be sprayed on the winding 3 to further dissipate heat from the winding 3.

[0054] In another specific embodiment, Figure 3 and Fig.11 As shown, a first oil injection hole 251 is provided on the inner circumferential wall of the first oil ring 21, and a second oil injection hole 252 is provided on the second oil ring 22. When the stator assembly 10 is cooled, the cooling oil can be passed into the cooling channel 12 through the first oil inlet channel 231 of the first oil ring 21, and then the cooling oil moves along the length direction of the cooling channel 12 and flows out from the other end of the cooling channel 12, and the outflowing cooling oil can enter the second oil inlet channel 232 of the second oil ring 22. Since the second oil ring 22 is provided with the second oil injection hole 252, part of the cooling oil is sprayed out from the second oil injection hole 252 to dissipate heat from the rear end of the winding 3. Another part of the cooling oil is discharged to the second oil ring 22 through the second oil outlet channel 242, and then the cooling oil flows back to the first oil outlet channel 241 through another cooling channel 12. Since the first oil injection hole 251 is provided on the inner circumferential wall of the first oil ring 21, the cooling oil can be sprayed on the winding 3 to further dissipate heat from the front end of the winding 3. like Figure 4 and Figure 8 As shown, the second oil injection hole 252 is opposite to and communicates with the second annular groove 272 in the radial direction of the second oil ring 22 , and the second oil injection hole 252 and the second oil inlet channel 232 are staggered in the circumferential direction of the second oil ring 22 .

[0055] Alternatively, if Figure 5As shown, a plurality of oil injection holes 25 are provided on the inner wall of the cooling oil ring 2, and the plurality of oil injection holes 25 are arranged at intervals along the circumference of the cooling oil ring 2, and the plurality of oil injection holes 25 correspond one-to-one to and are connected with the plurality of oil outlet channels 24. Specifically, there are a plurality of first oil injection holes 251 and they are arranged at intervals along the circumference of the first oil ring 21. For example, the plurality of first oil injection holes 251 correspond one-to-one to the plurality of first oil inlet channels 231, thereby improving the uniformity of cooling the front end of the winding 3. There are a plurality of second oil injection holes 252 and they are arranged at intervals along the circumference of the second oil ring 22. For example, the plurality of second oil injection holes 252 correspond one-to-one to the plurality of second oil inlet channels 232, thereby improving the uniformity of cooling the rear end of the winding 3.

[0056] Optionally, the length direction of the cooling channel 12 is arranged parallel to the axial direction of the stator core 1, so as to facilitate the processing and manufacturing of the stator core 1, and the structure is simple and the cost is low.

[0057] Alternatively, if Figure 4 As shown, the cooling channel 12 is spirally wound around the stator core 1. It can be understood that there is a certain angle between the cooling channel 12 and the axial direction of the stator core 1, so that the path of the cooling channel 12 in the stator core 1 can be extended, so that the cooling effect of the stator core 1 is better.

[0058] Alternatively, if Fig. 9 As shown, the cooling channel 12 is arranged in a winding manner on the stator core 1. For example, the cooling channel 12 may be in a wavy or serpentine shape, so that the path of the cooling channel 12 in the stator core 1 can be extended, so that the cooling effect of the stator core 1 is better.

[0059] In some embodiments, Figure 4 As shown, the stator core 1 includes a plurality of core punching sheets 11, which are stacked to form the stator core 1. The core punching sheets 11 are provided with through holes 121, and the through holes 121 of the plurality of core punching sheets 11 are connected in series to form a cooling channel 12. It can be understood that, as Fig. 9 As shown, adjacent core punching sheets 11 can be staggered at a certain angle along the circumferential direction, so that the cooling channel 12 formed by a plurality of through holes 121 in series can have different flow paths, thereby facilitating the processing and manufacturing of the cooling channel 12, and the manufacturing process is simple and the cost is low. In addition, the stator assembly 10 of the embodiment of the present invention can avoid processing an equivalent oil channel on the surface of the motor housing 20 by setting the cooling channel 12 to the above structure, thereby saving the manufacturing cost of the motor.

[0060] For example, the core punching sheets 11 can be reliably connected by welding, riveting or bonding. Each core punching sheet 11 is staggered in the circumferential direction according to a certain rule to form a spiral cooling channel 12, thereby increasing the heat dissipation area of ​​the cooling channel 12 and improving the heat dissipation efficiency.

[0061] In some embodiments, Figure 7 and Figure 8 As shown, the cooling oil ring 2 is provided with a plug-in column 26, and the end of the stator core 1 is provided with a matching hole (not shown), and the plug-in column 26 is plugged into the matching hole, so that the installation of the cooling oil ring 2 and the stator core 1 can be convenient, and the structural design is simple, and the connection reliability is high. For example, there can be multiple plug-in columns 26, and the multiple plug-in columns 26 are arranged at intervals along the circumference of the cooling oil ring 2, and accordingly, there can be multiple matching holes, and the multiple matching holes are arranged at intervals along the circumference of the stator core 1 and correspond to the plug-in columns 26 one by one.

[0062] Optionally, the first oil ring 21 and the second oil ring 22 can be made of oil-resistant and high-temperature-resistant plastics. For example, the first oil ring 21 and the second oil ring 22 can be made of PA66, PPA or PPS.

[0063] In some embodiments, Figure 5 As shown, the outer peripheral wall of the cooling oil ring 2 is provided with an annular groove 27, which is located on the side of the cooling oil ring 2 away from the stator core 1, and the annular groove 27 is connected to multiple oil inlet channels 23, and the oil inlet 201 is connected to the annular groove 27 (the first annular groove 271). It can be understood that the cooling oil can enter the annular groove 27 through the oil inlet 201. Since the annular groove 27 is connected to multiple oil inlet channels 23, the cooling oil can be evenly distributed to each cooling channel 12 of the stator core 1, so that the end of the winding 3 and the stator core 1 can be fully and evenly cooled. Figure 1 and Figure 4 As shown, the outer peripheral wall of the second oil ring 22 is provided with a second annular groove 272 , which is located on the side of the second oil ring 22 away from the stator core 1 , and is connected to the second oil inlet channel 232 and the second oil outlet channel 242 .

[0064] Alternatively, if Figure 2 and Figure 5As shown, the outer peripheral wall of the cooling oil ring 2 is provided with a first groove 2311, and the first groove 2311 and the inner wall of the motor housing 20 define an oil inlet channel 23. For example, the outer peripheral wall of the first oil ring 21 is provided with a first groove 2311 and a first protrusion 2411, and the first groove 2311 and the first protrusion 2411 are alternately arranged in the circumferential direction of the first oil ring 21, and the peripheral wall of the first groove 2311 and the inner wall of the motor housing 20 define a first oil inlet channel 231, and the first protrusion 2411 of the first oil ring 21 is opened in the axial direction to form a first oil outlet channel 241, that is, the first protrusion 2411 is opened along one end close to the stator core 1, and the first protrusion 2411 is closed along one end away from the stator core 1 to form the first oil outlet channel 241. The stator assembly 10 of the embodiment of the present invention can facilitate the processing and manufacturing of the first oil ring 21 by setting the first oil ring 21 as the above structure, and the manufacturing cost is low.

[0065] Alternatively, if Figure 2 and Figure 6 As shown, the outer peripheral wall of the cooling oil ring 2 is provided with a second groove 2421, and the second groove 2421 and the inner wall of the motor housing 20 define an oil outlet channel 24. The outer peripheral wall of the second oil ring 22 is provided with a second groove 2421 and a second protrusion 2321, and the second groove 2421 and the second protrusion 2321 are alternately arranged in the circumferential direction of the second oil ring 22, and the peripheral wall of the second groove 2421 and the inner wall of the motor housing 20 define a second oil outlet channel 242, and the second protrusion 2321 of the second oil ring 22 penetrates in the axial direction thereof to form a second oil inlet channel 232. The stator assembly 10 of the embodiment of the present invention can facilitate the processing and manufacturing of the second oil ring 22 by setting the second oil ring 22 to the above structure, and the manufacturing cost is low.

[0066] like Figure 4 As shown, a motor according to another embodiment of the present invention comprises a motor housing 20 and a stator assembly 10. The motor housing 20 is provided with an oil inlet 201, the stator assembly 10 is the stator assembly 10 of the present invention, the stator assembly 10 is arranged in the motor housing 20, and the oil inlet 201 is connected to the oil inlet channel 23 (first oil inlet channel 231).

[0067] According to the motor of the embodiment of the present invention, since the cooling oil ring 2 is alternately arranged with multiple oil inlet channels 23 and multiple oil outlet channels 24 in the circumferential direction, and the oil inlet channels 23, the oil outlet channels 24 and the cooling channels 12 are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core 1 can be fully and evenly cooled. On the other hand, since the cooling oil ring 2 is arranged at the end of the stator core 1, the end position of the stator core 1 and the end position of the winding 3 can be conveniently cooled, and the uniformity during cooling is good. Therefore, the structural design of the stator assembly 10 of the motor of the embodiment of the present invention is reasonable, and the stator core 1 and the winding 3 can be fully and evenly cooled, thereby improving the heat dissipation effect of the motor.

[0068] In some embodiments, Figure 5 As shown, an annular groove 27 is provided on the outer peripheral wall of the cooling oil ring 2 . The annular groove 27 is located on the side of the cooling oil ring 2 away from the stator core 1 . The annular groove 27 is connected to multiple oil inlet channels 23 , and the oil inlet port 201 is connected to the annular groove 27 .

[0069] A vehicle according to another embodiment of the present invention includes the stator assembly 10 or the motor according to the embodiment of the present invention.

[0070] According to the vehicle of the embodiment of the present invention, since the cooling oil ring 2 in the motor is alternately arranged with multiple oil inlet channels 23 and multiple oil outlet channels 24 in the circumferential direction, and the oil inlet channels 23, the oil outlet channels 24 and the cooling channels 12 are connected to form a circulating cooling circuit, the outer peripheral wall of the stator core 1 can be fully and evenly cooled. On the other hand, since the cooling oil ring 2 is arranged at the end of the stator core 1, the end position of the stator core 1 and the end position of the winding 3 can be conveniently cooled, and the uniformity during cooling is good. Therefore, the motor structure design of the vehicle of the embodiment of the present invention is reasonable, and the stator core 1 and the winding 3 can be fully and evenly cooled, thereby improving the heat dissipation effect of the motor.

[0071] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention 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 should not be understood as limiting the present invention.

[0072] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0073] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0074] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0075] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0076] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A stator assembly, characterized in that: include: A stator core, wherein a plurality of cooling channels are provided in the stator core, the plurality of cooling channels are arranged at intervals along the circumference of the stator core, and the cooling channels extend along the axial direction of the stator core; a first oil ring and a second oil ring, the first oil ring and the second oil ring are respectively arranged at two ends of the stator core in the axial direction, the first oil ring is provided with a plurality of first oil inlet channels and a plurality of first oil outlet channels, the plurality of the first oil inlet channels and the plurality of the first oil outlet channels are alternately arranged along the circumference of the first oil ring, the second oil ring is provided with a plurality of second oil inlet channels and a plurality of second oil outlet channels, the plurality of the second oil inlet channels and the plurality of the second oil outlet channels are alternately arranged along the circumference of the second oil ring, the first oil inlet channel is communicated with the second oil inlet channel through the corresponding cooling channel, the second oil outlet channel is communicated with the first oil outlet channel through the corresponding cooling channel, A second annular groove is provided on the outer peripheral wall of the second oil ring. The second annular groove is located on a side of the second oil ring away from the stator core. The second oil inlet channel and the second oil outlet channel are connected to the second annular groove.

2. The stator assembly according to claim 1, characterized in that A first annular groove is provided on the outer peripheral wall of the first oil ring, and the first annular groove is located on the side of the first oil ring away from the stator core. The first annular groove can be communicated with the oil inlet of the motor housing, and the first oil inlet channel is communicated with the first annular groove. A first oil injection hole is provided on the inner peripheral wall of the first oil ring, and the first oil injection hole is opposite to and communicated with the first oil outlet channel along the radial direction of the first oil ring.

3. The stator assembly according to claim 1, characterized in that: The inner circumferential wall of the second oil ring is provided with a second oil injection hole, which is opposite to and connected to the second annular groove in the radial direction of the second oil ring, and the second oil injection hole and the second oil inlet channel are staggered in the circumferential direction of the second oil ring.

4. The stator assembly according to claim 2, characterized in that: The outer wall surface of the first oil ring has first grooves and first protrusions alternately arranged along its circumference, the peripheral wall of the first groove and the inner wall of the motor housing define the first oil inlet channel, and the first protrusion has a hole along one end close to the stator core to form the first oil outlet channel.

5. The stator assembly according to claim 1, characterized in that: The outer wall surface of the second oil ring has second grooves and second protrusions alternately arranged along its circumference, the peripheral wall of the second groove and the inner wall of the motor housing define the second oil outlet channel, and the second protrusion penetrates in its axial direction to form the second oil inlet channel.

6. The stator assembly according to claim 1, characterized in that The length direction of the cooling channel is arranged parallel to the axial direction of the stator core; Alternatively, the cooling channel is spirally wound around the stator core; Alternatively, the cooling channel is arranged in a winding manner on the stator core.

7. The stator assembly according to claim 1, characterized in that The stator core comprises a plurality of core punching sheets, which are stacked to form the stator core. The core punching sheets are provided with through holes, and the through holes of the plurality of core punching sheets are connected in series to form the cooling channel.

8. The stator assembly according to claim 1, characterized in that The cross-sectional area of ​​the oil inlet passage along the axial direction perpendicular to the stator core is equal to the cross-sectional area of ​​the oil outlet passage along the axial direction perpendicular to the stator core.

9. A motor, characterized in that: include: A motor housing, wherein the motor housing is provided with an oil inlet; A stator assembly, wherein the stator assembly is the stator assembly described in any one of claims 1 to 8, wherein the stator assembly is disposed in the motor housing, and the oil inlet is connected to the first oil inlet channel.

10. A vehicle, characterized in that: include: The stator assembly according to any one of claims 1 to 8 or the motor according to claim 9.

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