Stator assembly, motor, driving assembly and vehicle

Abstract

The utility model discloses a stator assembly, a motor, a driving assembly and a vehicle, the stator assembly comprises a stator iron core, and a stator groove is formed on the stator iron core; a part of the stator winding is arranged in the stator groove; and the flow guide parts are arranged in the stator grooves, heat exchange flow channels are defined in the flow guide parts, and at least parts of the stator windings arranged in the stator grooves are located in the heat exchange flow channels. According to the stator winding provided by the utility model, the stator winding can exchange heat with the cooling oil flowing through the heat exchange runner so as to reduce the temperature of the stator assembly and improve the use performance of the stator assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a stator component, a motor, a drive assembly and a vehicle. Background Art

[0002] Automotive motors are widely used in pure electric vehicles and hybrid vehicles such as plug-in hybrid vehicles. The heat dissipation performance of automotive motors is directly related to the overall performance, efficiency and safety of the vehicle.

[0003] In the related art, when the motor is working, the winding heats up rapidly in a very short time, and the heat cannot be quickly transferred to the outside of the motor to cool it down, causing heat accumulation and temperature rise in the stator, which will cause the motor performance to deteriorate. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a stator assembly, in which the stator winding can exchange heat with the cooling oil flowing through the heat exchange flow channel to reduce the temperature of the stator assembly and improve the performance of the stator assembly.

[0005] The second objective of the present invention is to provide a motor using the above-mentioned stator assembly.

[0006] The third object of the present utility model is to provide a drive assembly using the above-mentioned stator assembly or motor.

[0007] The fourth objective of the present utility model is to provide a vehicle using the above motor or drive assembly.

[0008] According to the stator assembly of the embodiment of the first aspect of the utility model, it includes: a stator core, on which stator slots are formed; a stator winding, a portion of which is arranged in the stator slots; a guide member, which is arranged in the stator slots, and a heat exchange flow channel is defined in the guide member, and at least a portion of the stator winding arranged in the stator slots is located in the heat exchange flow channel.

[0009] According to the stator assembly of the embodiment of the utility model, by providing a guide member, the stator winding located in the heat exchange flow channel of the guide member can exchange heat with the heat exchange medium flowing through the heat exchange flow channel, thereby reducing the temperature of the stator winding and facilitating the long-term use of the stator winding.

[0010] According to some embodiments of the present invention, a notch is provided on the inner peripheral wall of the stator core, the notch is connected to the stator slot, and the flow guide member closes the notch.

[0011] According to some embodiments of the utility model, the flow guide member includes a first flow guide portion and a second flow guide portion connected to each other, the first flow guide portion and the second flow guide portion jointly define the heat exchange flow channel, the first flow guide portion is fitted in the stator slot, the portion of the stator winding is located in the first flow guide portion, and the second flow guide portion is fitted in the slot.

[0012] According to some embodiments of the present invention, the stator slots extend axially along the stator core and penetrate the axial end faces of the stator core; the heat exchange channel is open at both axial ends of the stator core, and the stator winding passes through the heat exchange channel.

[0013] According to some embodiments of the present invention, end surfaces of the flow guide at both ends along the axial direction of the stator core are respectively flush with end surfaces of the stator slots at both ends along the axial direction of the stator core.

[0014] According to some embodiments of the present invention, the two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further includes: a first heat exchange structure, the first heat exchange structure is arranged at the first end of the stator core in the axial direction, the first heat exchange structure is arranged on the outer peripheral side of the first end of the stator winding located outside the stator slot, and the first heat exchange structure extends along the circumference of the stator core, a circulation space is formed in the first heat exchange structure, the circulation space has a plurality of spray holes, the plurality of spray holes are evenly spaced along the circumference of the first heat exchange structure, and the spray holes are formed on a side surface of the first heat exchange structure facing the stator winding.

[0015] According to some embodiments of the present invention, the two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further includes: a second heat exchange structure, the second heat exchange structure is arranged at the second end of the stator core, the second heat exchange structure and the stator core jointly define a accommodating space, the end of the second end of the stator winding located outside the stator slot is located in the accommodating space, and the accommodating space is connected to the heat exchange flow channel.

[0016] According to some embodiments of the present invention, a receiving groove is formed on the second heat exchange structure, the receiving groove is open on a side facing the stator core, and the receiving groove and the stator core together define the receiving space.

[0017] According to some embodiments of the present invention, the second heat exchange structure includes a first sub-heat exchange structure and a second sub-heat exchange structure, the first sub-heat exchange structure and the second sub-heat exchange structure both extend along the circumference of the stator core, the second sub-heat exchange structure is located radially inside the first sub-heat exchange structure, and the first sub-heat exchange structure, the second sub-heat exchange structure, and the stator core are suitable for jointly defining the accommodating space with the casing of the motor.

[0018] According to some embodiments of the present invention, the two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further includes: a first heat exchange structure, which is arranged at the first end of the stator core in the axial direction, and the first heat exchange structure is arranged on the outer peripheral side of the end of the first end of the stator winding located outside the stator slot, and the first heat exchange structure extends along the circumference of the stator core, a circulation space is formed in the first heat exchange structure, and the circulation space has a plurality of spray holes, and the plurality of spray holes are evenly spaced along the circumference of the first heat exchange structure, and the spray holes are formed on the side surface of the first heat exchange structure facing the stator winding, and at least one connecting flow channel is formed on the stator core, and the connecting flow channel extends along the axial direction of the stator core, and the two ends of the connecting flow channel are respectively connected with the circulation space and the accommodating space.

[0019] According to some embodiments of the present invention, an inlet flow channel is formed on the stator core, and the inlet flow channel is communicated with the connecting flow channel.

[0020] According to some embodiments of the utility model, the connecting flow channel includes a first connecting flow channel section and a second connecting flow channel section arranged at intervals along the axial direction of the stator core, one of the first connecting flow channel section and the second connecting flow channel section is connected to the accommodating space, the other of the first connecting flow channel section and the second connecting flow channel section is connected to the circulation space, and the inlet flow channel is located between the first connecting flow channel section and the second connecting flow channel section.

[0021] According to some embodiments of the utility model, the inlet flow channel extends along the circumference of the stator core; there are multiple connecting flow channels, and the multiple connecting flow channels are arranged at intervals along the circumference of the stator core, and the multiple connecting flow channels are all connected to the inlet flow channel.

[0022] According to some embodiments of the present invention, a first groove is formed on the outer circumferential surface of the stator core, the first groove extends along the circumference of the stator core, and the first groove is suitable for defining the inlet flow channel together with the inner wall surface of the motor casing.

[0023] According to some embodiments of the present invention, at least one second groove is formed on the outer peripheral surface of the stator core, the second groove extends along the axial direction of the stator core, and the second groove is suitable for defining the connecting flow channel together with the inner wall surface of the motor casing.

[0024] The motor according to the second aspect of the present invention comprises the stator assembly according to the first aspect of the present invention.

[0025] The drive assembly according to the third aspect of the present invention includes the stator assembly according to the first aspect, or the motor according to the second aspect.

[0026] The vehicle according to the fourth aspect of the present invention comprises the motor according to the second aspect, or the drive assembly according to the third aspect.

[0027] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0029] Figure 1 is a schematic diagram of a stator assembly according to an embodiment of the utility model;

[0030] Figure 2 yes Figure 1 The enlarged view of the part A shown in the middle circle;

[0031] Figure 3 is a schematic diagram of a stator assembly according to an embodiment of the utility model from another angle;

[0032] Figure 4 yes Figure 3 An enlarged view of the circled section B;

[0033] Figure 5 is a side view of a stator assembly according to an embodiment of the utility model;

[0034] Figure 6 is a schematic diagram of a flow guide of a stator assembly according to an embodiment of the utility model;

[0035] Figure 7 is a front view of a flow guide of a stator assembly according to an embodiment of the utility model;

[0036] Figure 8 is a cross-sectional view of a stator assembly according to an embodiment of the utility model;

[0037] Fig. 9 yes Figure 8 The enlarged view of the C section circled in the middle;

[0038] Fig.10 is a cross-sectional view of a stator assembly according to an embodiment of the utility model at another angle;

[0039] Fig.11 yes Fig.10 An enlarged view of the D section circled in the middle;

[0040] Fig.12 is a schematic diagram of a first heat exchange structure of a stator assembly according to an embodiment of the utility model;

[0041] Fig.13 is a schematic diagram of a second heat exchange structure of a stator assembly according to an embodiment of the utility model;

[0042] Fig.14 is a cross-sectional view of a stator assembly according to another embodiment of the utility model.

[0043] Reference numerals:

[0044] 100. stator assembly;

[0045] 1. stator core; 11. stator slot; 110. slot;

[0046] 12. Inlet flow channel; 13. Connecting flow channel;

[0047] 131. a first communicating flow channel section; 132. a second communicating flow channel section;

[0048] 14. a first groove; 15. a second groove;

[0049] 2. Stator winding; 3. Flow guide; 31. Heat exchange flow channel;

[0050] 32. a first flow guide; 33. a second flow guide;

[0051] 4. first heat exchange structure; 41. circulation space; 42. spray hole;

[0052] 5. Second heat exchange structure; 51. Accommodation space; 52. Accommodation tank;

[0053] 53. a first sub-heat exchange structure; 54. a second sub-heat exchange structure;

[0054] 10. Shell. DETAILED DESCRIPTION

[0055] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 14 A stator assembly 100 according to an embodiment of a first aspect of the present invention is described.

[0056] like Figure 1 ,as well as Figure 3-Figure 10 As shown, the stator assembly 100 according to the embodiment of the first aspect of the utility model includes a stator core 1, a stator winding 2 and a flow guide 3.

[0057] Specifically, a stator slot 11 is formed on the stator core 1, a portion of the stator winding 2 is disposed in the stator slot 11, a flow guide 3 is disposed in the stator slot 11, a heat exchange flow channel 31 is defined in the flow guide 3, and at least a portion of the stator winding 2 disposed in the stator slot 11 is located in the heat exchange flow channel 31. For example, the stator winding 2 can extend along the axial direction of the stator core 1 to be wound in the stator slot 11, and the stator slot 11 can also extend along the axial direction of the stator core 1. The stator slot 11 can be used to accommodate the stator winding 2, and can also position and limit the stator winding 2 to facilitate the assembly of the stator winding 2 and the stator core 1. For example, in Figure 3 , Figure 4 , Figure 6 and Figure 7 In the example, the guide 3 extends along the axial direction of the stator core 1, and at least a portion of the stator winding 2 located in the stator slot 11 is placed in the stator slot 11 after passing through the heat exchange channel 31. The length of the guide 3 may not be specifically limited. For example, when the length of the guide 3 is less than the length of the stator slot 11, a portion of the stator winding 2 passes through the heat exchange channel 31, and another portion of the stator winding 2 is located in the stator slot 11. Of course, the length of the guide 3 may also be the same as the length of the stator slot 11, or the length of the guide 3 may be greater than the length of the stator slot 11, which may be set according to actual conditions.

[0058] When the motor is in operation, a large amount of heat will be generated in the coil of the stator winding 2 while the current generates a magnetic field through the stator winding 2. By setting the flow guide 3, the heat exchange medium can flow in the heat exchange channel 31 to contact the stator winding 2 in the heat exchange channel 31 to perform heat exchange with the stator winding 2, thereby reducing the temperature of the stator winding 2 and facilitating the long-term use of the stator winding 2.

[0059] According to the stator assembly 100 of the embodiment of the utility model, by providing a flow guide 3, the stator winding 2 located in the heat exchange channel 31 of the flow guide 3 can exchange heat with the heat exchange medium flowing through the heat exchange channel 31, thereby reducing the temperature of the stator winding 2, which is beneficial to the long-term use of the stator winding 2.

[0060] According to some embodiments of the present invention, Figure 6-Figure 9, a slot 110 is provided on the inner circumferential wall of the stator core 1, the slot 110 is connected to the stator slot 11, and the guide member 3 closes the slot 110. For example, in Figure 6-Figure 9 In the example of , the stator core 1 is annular, the notch 110 is formed on the radial inner side of the stator slot 11, and the notch 110 is connected to the inside of the stator slot 11. The guide member can be provided in an annular shape extending along the side wall of the stator slot 11, and the guide member 3 is provided along the stator slot 11 perpendicular to the central axis of the stator core 1 (for example, Figure 1 In other words, the flow guide 3 is closed in the circumferential direction of the stator slot 11 around the central axis of the stator core 1. In the following description, the rotor assembly of the motor (not shown) is located on the inner circumference of the stator assembly 100.

[0061] Thus, by setting the guide member 3 to close the slot 110, a heat exchange channel 31 can be defined in the guide member 3, and the heat exchange medium flowing into the heat exchange channel 31 can flow along the extension direction of the guide member 3, and the heat exchange medium will not flow out from the side of the guide member 3 on the circumferential direction of the stator slot 11, thereby limiting the flow direction of the heat exchange medium and ensuring that the stator winding 2 located in the heat exchange channel 31 is in contact with the heat exchange medium, so as to ensure that the heat exchange medium and the stator winding 2 are heat exchanged, and at the same time, the utilization rate of the heat exchange medium is improved. In addition, during the flow of the heat exchange medium, the guide member 3 contacts the inner circumferential wall of the stator slot 11, so that the heat exchange medium can exchange heat with the inner side of the stator core 1, so as to reduce the temperature of the inner side of the stator core 1 and reduce the internal temperature accumulation of the stator core 1, thereby facilitating the heat dissipation of the stator core 1, improving the performance of the stator core 1, and preventing the stator core 1 from being too high and transferring the temperature to the rotor assembly, thereby improving the performance of the motor. Moreover, the flow guide 3 has a simple structure, is easy to produce and process, and has a low cost. In addition, the stator winding 2 can be placed in the stator slot 11 through the notch 110, which is conducive to the rapid assembly of the stator winding 2 and the stator core 1. Of course, when the rotor assembly is located on the radial outer peripheral side of the stator assembly 100, the side of the notch 110 of the stator slot 11 away from the stator slot 11 penetrates the outer peripheral wall of the stator core 1.

[0062] According to some embodiments of the present invention, Figure 6-Figure 9 The guide member 3 includes a first guide portion 32 and a second guide portion 33 connected to each other. The first guide portion 32 and the second guide portion 33 jointly define a heat exchange flow channel 31. The first guide portion 32 is fitted in the stator slot 11, and the above-mentioned part of the stator winding 2 is located in the first guide portion 32. The second guide portion 33 is fitted in the slot 110.

[0063] For example, in Figure 6-Figure 9In the example, the shape of the flow guide 3 is adapted to the shape of the stator slot 11, so that the flow guide 3 can fit in the stator slot 11, and the gap between the inner wall surface of the stator slot 11 and the outer peripheral surface of the flow guide 3 can be reduced. The first flow guide 32 is located radially inside the second flow guide 33, and the second flow guide 33 is close to the central axis of the stator core 1. The cross-sectional shape of the first flow guide 32 is roughly rectangular, and the cross-sectional shape of the second flow guide 33 is roughly a curved and extended rhombus. The cross-sectional area of ​​the second flow guide 33 is smaller than the cross-sectional area of ​​the first flow guide 32, and the side of the second flow guide 33 away from the first flow guide 32 is closed at the slot 110. In this way, the above-mentioned part of the stator winding 2 can be placed in the first guide part 32, and the heat exchange medium can flow in the second guide part 33. In the process of the heat exchange medium flowing along the extension direction of the second guide part 33, on the one hand, it can contact the side of the stator winding 2 facing the central axis of the stator core 1, so that the heat exchange medium and the stator winding 2 can exchange heat to reduce the temperature of the stator winding 2 and take away the heat generated by the stator winding 2. On the other hand, the second guide part 33 is adjacent to the side where the rotor assembly is located, which can reduce the impact of the temperature rise of the stator assembly 100 on the rotor assembly and ensure that the rotor assembly works at a relatively stable ambient temperature. It should be noted that the shape of the stator slot 11 and the shape of the guide member 3 can be specifically set according to actual use to better meet practical applications.

[0064] According to some embodiments of the present invention, Figure 1 and Figure 6 The stator slot 11 extends along the axial direction of the stator core 1 and penetrates the axial end faces of the stator core 1. The heat exchange channel 31 is open at both axial ends of the stator core 1. The stator winding 2 passes through the heat exchange channel 31. For example, Figure 1 and Figure 6 In the example, both ends of the heat exchange channel 31 in the length direction are open, the two end portions of the stator winding 2 are respectively located outside the heat exchange channel 31, and the two end portions of the stator winding 2 are also respectively located outside the stator slot 11, and the middle part of the stator winding 2 is located in the heat exchange channel 31. With such a configuration, the structure of the guide 3 is simple, which is conducive to the production and processing of the guide 3, and is also conducive to the rapid assembly of the stator winding 2 and the guide 3. In addition, the heat exchange medium flowing in the heat exchange channel 31 can contact the stator winding 2 located in the heat exchange channel 31 to take away the heat generated by the stator winding 2. At the same time, the end of the stator winding 2 can be connected to other components to facilitate the use of the stator assembly 100.

[0065] According to some embodiments of the present invention, referring to Fig.10 , the end faces of the flow guide 3 along the axial direction of the stator core 1 are respectively flush with the end faces of the stator slot 11 along the axial direction of the stator core 1. Fig.10In the example, the length of the flow guide 3 is the same as the length of the stator slot 11. With such a configuration, on the one hand, the heat exchange medium in the heat exchange channel 31 can fully contact the stator winding 2 and the inner wall surface of the stator core 1 to reduce the temperature of the stator core 1 and the stator winding 2, so as to facilitate the long-term use of the stator assembly 100. On the other hand, if one end of the flow guide 3 in the length direction extends to the end face of the stator slot 11 along the axial end of the stator core 1, the length of the flow guide 3 is too long, which will be detrimental to the assembly of the stator assembly 100 with other components, and will also cause material waste of the flow guide 3. It can be seen that the moderate length of the heat exchange member saves costs while being beneficial to the heat dissipation of the stator core 1 and the stator winding 2, thereby facilitating the normal use of the stator assembly 100 and the motor and improving the performance of the motor.

[0066] According to some embodiments of the present invention, Figure 1 , Figure 10-12 The two axial ends of the stator winding 2 extend to the outside of the stator slot 11 respectively. The stator assembly 100 further includes a first heat exchange structure 4, which is arranged at a first end of the stator core 1 in the axial direction (for example, Fig.10 The first heat exchange structure 4 is provided at the first end of the stator winding 2 located outside the stator slot 11 (for example, the first end is Fig.10 The left end of the stator winding 2 in the middle, the right end of the stator winding 2 is the outer peripheral side of the end of the stator winding 2, and the first heat exchange structure 4 extends along the circumferential direction of the stator core 1, and a flow space 41 is formed in the first heat exchange structure 4. The flow space 41 has at least one spray hole 42, and the spray hole 42 is formed on the side surface of the first heat exchange structure 4 facing the stator winding 2.

[0067] For example, in Figure 1 , Figure 10-12In the example, the first heat exchange structure 4 is connected to the left end of the stator core 1 (i.e., the first end of the stator core 1), the first heat exchange structure 4 can be set to a circular ring shape, the first heat exchange structure 4 is located on the outer peripheral side of the left end of the stator winding 2 (i.e., the welding end of the stator winding 2), the first heat exchange structure 4 is an internally hollow structure, and the spray hole 42 is formed on the inner peripheral wall of the first heat exchange structure 4. After the heat exchange medium flows into the circulation space 41, it can be sprayed out from the spray hole 42 to contact the end of the stator winding 2, thereby taking away the heat of the welding end of the stator winding 2. In addition, the first heat exchange structure 4 is located on the outer peripheral side of the end of the stator winding 2, which does not affect the wiring of the stator winding 2, thereby facilitating the normal use of the stator winding 2. In addition, it can also avoid the stator winding 2 and the stator core 1 from being immersed in the heat exchange medium for a long time, thereby reducing the oil stirring loss. When the stator winding 2 is used for a motor, the motor efficiency can be improved, and a high-speed motor can be produced. Moreover, the first heat exchange structure 4 has a simple structure and is easy to produce and process. It should be noted that the heat exchange medium can flow into the circulation space 41 in various ways, for example, Fig.10 In the example, the right side of the first heat exchange structure 4 is open to communicate with the outside of the first heat exchange structure 4. Of course, through holes (not shown) can be provided on other sides of the first heat exchange structure 4 to allow the heat exchange medium to flow into the circulation space 41.

[0068] According to some embodiments of the present invention, Fig.12 As shown, there are multiple spray holes 42, and the multiple spray holes 42 are evenly spaced and arranged along the circumference of the first heat exchange structure 4. In the description of the present utility model, the meaning of "multiple" is two or more. For example, in Fig.10 and Fig.12 In the example, multiple spray holes 42 are all connected to the circulation space 41. The heat exchange medium flowing into the circulation space 41 can flow along the extension direction of the first heat exchange structure 4 to various circumferential positions of the first heat exchange structure 4, and then flow out through multiple spray holes 42 to various circumferential positions of the stator winding 2. In this way, the heat exchange medium can dissipate heat from various positions of the stator winding 2 along the circumference of the stator core 1 to reduce the overall temperature of the end of the stator winding 2 and avoid local overheating. In addition, since the spray holes 42 are arranged along the circumference of the first heat exchange structure 4, the stator winding 2 can obtain a uniform cooling effect. It should be noted that the number of spray holes 42, the shape and size of each spray hole 42 can be set according to the specific use to better meet the actual application.

[0069] According to other embodiments of the present invention, Fig.10 and Fig.13The two axial ends of the stator winding 2 extend to the outside of the stator slot 11 respectively. The stator assembly 100 further includes a second heat exchange structure 5, which is arranged at the second end of the stator core 1. The second heat exchange structure 5 and the stator core 1 jointly define a receiving space 51. The end of the second end of the stator winding 2 located outside the stator slot 11 is located in the receiving space 51, and the receiving space 51 is connected to the heat exchange channel 31. For example, in Fig.10 and Fig.13 In the example, the second heat exchange structure 5 is connected to the right end of the stator core 1 (that is, the second end of the stator core 1 mentioned above), and the left side of the second heat exchange structure 5 is open to define a receiving space 51 together with the right end surface of the stator core 1, and the right end of the stator assembly 100 (that is, the hairpin end of the stator winding 2) is located in the receiving space 51.

[0070] With such a configuration, after the heat exchange medium flows into the accommodating space 51 and fills the accommodating space 51, the right end of the stator winding 2 is immersed in the heat exchange medium, forming an immersion heat exchange, so as to reduce the temperature of the hairpin end of the stator winding 2, and the cooling effect on the stator winding 2 is good and the heat exchange efficiency is high. In addition, by configuring the accommodating space 51 to be connected with the heat exchange flow channel 31, the heat exchange medium in the accommodating space 51 can flow into the heat exchange flow channel 31 to flow along the heat exchange flow channel 31, thereby cooling the stator winding 2 in the axial direction of the stator winding 2. In addition, through the joint action of the first heat exchange structure 4 and the second heat exchange structure 5, the hairpin end of the stator winding 2 is immersed in cooling, and the welding end of the stator winding 2 is oil-sprayed in cooling, the cooling efficiency is very high, and the oil stirring loss is reduced while taking into account the cooling performance. Moreover, when the heat exchange channel 31 is located in the stator slot 11, the cooling efficiency of the customized winding and the stator core 1 is further improved, and the performance of the stator assembly 100 is further improved. Furthermore, the second heat exchange structure 5 forms a seal on one end of the flow guide 3 adjacent to the second heat exchange structure 5, so that the heat exchange medium in the accommodating space 51 flows into the heat exchange channel 31.

[0071] According to some embodiments of the present invention, referring to Fig.13 The second heat exchange structure 5 is formed with a receiving groove 52, the side of the receiving groove 52 facing the stator core 1 is open, and the receiving groove 52 and the stator core 1 together define a receiving space 51. Fig.13 In the example, the left side of the second heat exchange structure 5 is open, the second heat exchange structure 5 extends along the circumference of the stator core 1, and the cross-sectional shape of the second heat exchange structure 5 is U-shaped. With such a configuration, the second heat exchange structure 5 has a simple structure and is easy to produce and process. In addition, by providing the receiving groove 52, the internal space of the second heat exchange structure 5 can be reasonably utilized for storing heat exchange medium. It should be noted that the receiving space 51 is connected to the heat exchange channel 31, and the other positions of the receiving space 51 except for the position connected to the heat exchange channel 31 are closed structures to avoid leakage of the heat exchange medium.

[0072] According to other embodiments of the present invention, Fig.14 The second heat exchange structure 5 includes a first sub-heat exchange structure 53 and a second sub-heat exchange structure 54. The first sub-heat exchange structure 53 and the second sub-heat exchange structure 54 both extend along the circumference of the stator core 1. The second sub-heat exchange structure 54 is located radially inside the first sub-heat exchange structure 53. The first sub-heat exchange structure 53, the second sub-heat exchange structure 54, and the stator core 1 are suitable for jointly defining a receiving space 51 with the housing 10 of the motor.

[0073] For example, in Fig.14 In the example, the first sub-heat exchange structure 53 and the second sub-heat exchange structure 54 are both annular, the diameter of the second heat exchange structure 5 is smaller than the diameter of the first heat exchange structure 4, the first sub-heat exchange structure 53 is located on the outer peripheral side of the other end of the stator winding 2 away from the central axis of the stator core 1, and the second sub-heat exchange structure 54 is located on the inner peripheral side of the other end of the stator winding 2 adjacent to the central axis of the stator core 1. When the stator assembly 100 is used for the motor, the left end face of the first sub-heat exchange structure 53 and the left end face of the second sub-heat exchange structure 54 are connected to the right end face of the stator core 1, and the right end face of the first sub-heat exchange structure 53 and the right end face of the second sub-heat exchange structure 54 are connected to the inner wall surface of the motor housing 10, so as to define the accommodation space 51 together with the inner wall surface of the motor housing 10. With such a configuration, the structure of the second heat exchange structure 5 is simpler, which is more conducive to the production and processing of the second heat exchange structure 5, and improves the production efficiency. In addition, the housing 10 of the motor can also be reasonably utilized to reduce the space occupied by the stator assembly 100 in the motor.

[0074] According to some embodiments of the present invention, Figure 1 , Figure 2 ,as well as Figure 10-12 The two axial ends of the stator winding 2 extend to the outside of the stator slot 11 respectively. The stator assembly 100 further includes a first heat exchange structure 4, which is arranged at a first end of the stator core 1 in the axial direction (for example, Fig.10 The first heat exchange structure 4 is provided at the first end of the stator winding 2 located outside the stator slot 11 (for example, the first end is Fig.10The first heat exchange structure 4 is formed on the outer peripheral side of the end portion of the stator core 1 (the left end of the stator winding 2, and the right end of the stator winding 2 is the second end of the stator winding 2), and the first heat exchange structure 4 extends along the circumferential direction of the stator core 1. A circulation space 41 is formed in the first heat exchange structure 4. The circulation space 41 has at least one spray hole 42. The spray hole 42 is formed on the surface of the first heat exchange structure 4 facing the stator winding 2. At least one connecting flow channel 13 is formed on the stator core 1. The connecting flow channel 13 extends along the axial direction of the stator core 1. The two ends of the connecting flow channel 13 are respectively connected to the circulation space 41 and the accommodating space 51.

[0075] For example, in Figure 1 and Figure 2 In the example, the connecting flow channel 13 is arranged near the outer peripheral surface of the stator core 1. After the heat exchange medium flows into the stator core 1, it can flow to the two axial ends of the stator core 1 along the extension direction of the connecting flow channel 13. For example, a heat exchange medium inlet (not shown) can be formed on the motor, and the heat exchange medium inlet is connected to the connecting flow channel 13, so that the heat exchange medium can flow into the connecting flow channel 3 through the heat exchange medium inlet. Or an inlet flow channel 12 connected to the connecting flow channel 13 is formed on the stator core 1 to enable the heat exchange medium to flow smoothly into the heat exchange flow channel 13.

[0076] For example, in Figure 1 and Figure 2 In the example, the left end of the connecting flow channel 13 is connected to the circulation space 41, and the right end of the connecting flow channel 13 is connected to the accommodating space 51. That is, a part of the heat exchange medium in the connecting flow channel 13 can flow into the connecting space from the left end of the connecting flow channel 13, and then be sprayed to the left end of the stator winding 2 through the spray hole 42. Another part of the heat exchange medium in the connecting flow channel 13 can flow from the right end of the connecting flow channel 13 to the accommodating space 51, and fully contact with the right end of the stator winding 2 in the accommodating space 51 for heat exchange, and the heat exchange medium in the accommodating space 51 can flow into the heat exchange flow channel 31 from the right end of the heat exchange flow channel 31, flow along the extension direction of the heat exchange flow channel 31, so as to contact with the stator winding 2 located in the heat exchange flow channel 31 to take away the heat of the stator winding 2, and then the heat exchange medium flows out from the left end of the heat exchange flow channel 31 (the flow path of the heat exchange medium is as shown in FIG. 2 ). Fig.10 That is, the communication channel 13 covers the surface of the stator core 1 and has a strong cooling effect on the stator core 1.

[0077] In this way, the communication channel 13 can not only communicate with the circulation space 41 and the accommodating space 51, but the heat exchange medium flowing through the communication channel 13 can also exchange heat with the stator core 1 to reduce the temperature of the stator core 1, thereby facilitating the long-term use of the stator core 1. In addition, the layout of the communication channel 13 is reasonable, which is conducive to the heat exchange medium flowing to the first heat exchange structure 4 and the second heat exchange structure 5, so as to fully contact various parts of the stator winding 2, so as to further improve the heat dissipation and cooling effect of the stator winding 2.

[0078] According to some embodiments of the present invention, Figure 1 and Figure 2 , an inlet flow channel 12 is formed on the stator core 1, and the inlet flow channel 12 is connected to the connecting flow channel 13. For example, Figure 1 and Figure 2 In the example, the heat exchange medium can flow through the inlet flow channel 12 into the connecting flow channel 13, and flow to the axial ends of the stator core 1 along the extension direction of the connecting flow channel 13. In this way, the inlet flow channel 12 covers the surface of the stator core 1, such as the outer peripheral surface, and has a strong cooling effect on the outer side of the stator core 1. In addition, it is also conducive to the orderly flow of the heat exchange medium in the inlet flow channel 12 and the connecting flow channel 13, so as to smoothly flow to the circulation space 41 and the accommodating space 51. According to some embodiments of the present invention, combined with Figure 1-Figure 3 The connecting flow channel 13 includes a first connecting flow channel section 131 and a second connecting flow channel section 132 which are arranged at intervals along the axial direction of the stator core 1. One of the first connecting flow channel section 131 and the second connecting flow channel section 132 is connected to the accommodating space 51, and the other of the first connecting flow channel section 131 and the second connecting flow channel section 132 is connected to the circulation space 41. The inlet flow channel 12 is located between the first connecting flow channel section 131 and the second connecting flow channel section 132.

[0079] For example, in Figure 1 and Fig.10In the example, the left end of the first connecting flow channel section 131 is connected to the circulation space 41, the right end of the first connecting flow channel section 131 is connected to the inlet flow channel 12, the left end of the second connecting flow channel section 132 is connected to the inlet flow channel 12, and the right end of the second connecting flow channel section 132 is connected to the accommodating space 51. Such a configuration is conducive to the diversion of the heat exchange medium flowing from the inlet flow channel 12 to the connecting flow channel 13 in the connecting flow channel 13, so as to facilitate the heat exchange medium to flow smoothly to the circulation space 41 and the accommodating space 51, thereby being more conducive to cooling the stator winding 2. Moreover, the heat exchange medium in the first connecting flow channel section 131 and the second connecting flow channel section 132 is not easy to affect each other, so as to ensure that the temperature difference between the two ends of the stator winding 2 is small, thereby improving the heat exchange effect at the two ends of the stator winding 2. Optionally, the inlet flow channel 12 is formed at the axial middle position of the stator core 1 so that the lengths of the first connecting flow channel section 131 and the second connecting flow channel section 132 are approximately the same, so that the temperatures of the heat exchange medium flowing to the two end portions of the stator winding 2 are close and the heat exchange effects are close.

[0080] According to some embodiments of the present invention, Figure 1 The inlet flow channel 12 extends along the circumference of the stator core 1 , and there are multiple connecting flow channels 13 . The multiple connecting flow channels 13 are arranged at intervals along the circumference of the stator core 1 , and the multiple connecting flow channels 13 are all connected to the inlet flow channel 12 .

[0081] For example, in Figure 1 In the example, the inlet flow channel 12 is formed into a closed loop extending along the circumference of the stator core 1, and the multiple connecting flow channels 13 are evenly spaced and arranged along the circumference of the stator core 1. As a result, the heat exchange medium flowing into the inlet flow channel 12 can flow along the circumference of the stator core 1, so that the heat exchange medium can flow smoothly into the multiple connecting flow channels 13, so that the heat exchange medium in the multiple connecting flow channels 13 can exchange heat with various places in the circumference of the stator core 1, so as to further reduce the temperature of the stator core 1 and further improve the heat exchange effect on the stator core 1. In addition, the circulation space 41 and the accommodating space 51 are both spaces extending along the circumference of the stator core 1, and the two ends of the multiple connecting flow channels 13 can flow to the corresponding connecting space or accommodating space 51 at various angles along the circumference of the stator core 1, so as to facilitate the flow of the heat exchange medium between the multiple connecting flow channels 13 and the connecting space and the accommodating space 51, and the flow channel layout is more reasonable. It should be noted that the communication flow channel 13 and the inlet flow channel 12 can be set as flow channels formed in the stator core 1 , and can also be set as flow channels formed on the outer peripheral surface of the stator core 1 .

[0082] According to some optional embodiments of the present invention, referring to Figure 1A first groove 14 is formed on the outer circumferential surface of the stator core 1. The first groove 14 extends along the circumferential direction of the stator core 1. The first groove 14 is suitable for defining an inlet flow channel 12 together with the inner wall surface of the housing 10 of the motor. For example, Figure 1 In the example, the first groove 14 can be formed at the middle position of the stator core 1 along the axial direction of the stator core 1. With this arrangement, the structure of the first groove 14 is simple, which is conducive to the formation of the inlet flow channel 12. In addition, the housing 10 of the motor is fully utilized, thereby simplifying the structure of the inlet flow channel 12, reducing the difficulty of motor processing, and improving processing efficiency. Moreover, the contact between the heat exchange medium and the housing 10 can cool the housing 10 of the motor. It should be noted that the cross-sectional shape and size of the first groove 14 can be specifically set according to actual use to better meet practical applications.

[0083] According to some embodiments of the present invention, Figure 1 At least one second groove 15 is formed on the outer peripheral surface of the stator core 1. The second groove 15 extends along the axial direction of the stator core 1. The second groove 15 is suitable for defining a communication flow channel 13 together with the inner wall surface of the motor housing 10. For example, Figure 1 In the example, the extension direction of the second groove 15 is consistent with the axial direction of the stator core 1. With this arrangement, the structure of the second groove 15 is simple, which is conducive to the formation of the connecting flow channel 13. In addition, the length of the second groove 15 is shortened, thereby shortening the flow path of the heat exchange medium on the surface of the stator core 1, which is more conducive to the rapid flow of the heat exchange medium on the stator core 1. In addition, the housing 10 of the motor is fully utilized, thereby simplifying the structure of the connecting flow channel 13, reducing the processing difficulty of the motor and improving the processing efficiency. Moreover, the contact between the heat exchange medium and the housing 10 can cool the housing 10 of the motor. It should be noted that the cross-sectional shape and size of the second groove 15 can be specifically set according to actual use to better meet practical applications.

[0084] The motor (not shown) according to the second embodiment of the utility model comprises the stator assembly 100 according to the first embodiment.

[0085] According to the motor of the embodiment of the present invention, by adopting the above-mentioned stator assembly 100, the working efficiency of the motor is higher, the performance of the motor is improved, and the service life of the motor is extended.

[0086] The drive assembly (not shown) according to the third aspect of the utility model comprises the stator assembly 100 according to the first aspect, or the motor according to the second aspect.

[0087] According to the drive assembly of the embodiment of the utility model, by adopting the above-mentioned stator assembly 100 or motor, the stator assembly 100 or the motor has higher working efficiency and better heat dissipation effect, thereby improving the performance of the drive assembly and extending the service life of the drive assembly.

[0088] A vehicle according to an embodiment of the fourth aspect of the utility model (not shown) includes a motor according to an embodiment of the second aspect, or includes a drive assembly according to an embodiment of the third aspect.

[0089] According to the vehicle of the embodiment of the utility model, by adopting the above-mentioned motor or drive assembly, the performance of the vehicle is improved and it is beneficial for the vehicle to work for a long time.

[0090] The stator assembly 100 , the motor, the drive assembly and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0091] In the description of the present invention, it should 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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 a limitation on the present invention.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means 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 utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0093] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly, characterized in that: include: A stator core, wherein stator slots are formed on the stator core; a stator winding, a portion of which is disposed in the stator slot; A flow guide is arranged in the stator slot, a heat exchange flow channel is defined in the flow guide, and at least a part of the stator winding arranged in the stator slot is located in the heat exchange flow channel.

2. The stator assembly according to claim 1, characterized in that: A notch is provided on the inner peripheral wall of the stator core, the notch is connected to the stator slot, and the flow guide closes the notch.

3. The stator assembly according to claim 2, characterized in that: The flow guide member includes a first flow guide portion and a second flow guide portion connected to each other, the first flow guide portion and the second flow guide portion jointly define the heat exchange flow channel, the first flow guide portion is fitted in the stator slot, the portion of the stator winding is located in the first flow guide portion, and the second flow guide portion is fitted in the slot.

4. The stator assembly according to claim 1, characterized in that: The stator slots extend along the axial direction of the stator core and penetrate through the axial end faces of both ends of the stator core; The heat exchange flow channel is open at both ends along the axial direction of the stator core, and the stator winding passes through the heat exchange flow channel.

5. The stator assembly according to claim 4, characterized in that The end surfaces of the flow guide along the axial direction of the stator core are respectively flush with the end surfaces of the stator slot along the axial direction of the stator core.

6. The stator assembly according to any one of claims 1 to 5, characterized in that: The two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further comprises: A first heat exchange structure, wherein the first heat exchange structure is arranged at a first end in the axial direction of the stator core, the first heat exchange structure is arranged on the outer peripheral side of an end portion of a first end of the stator winding located outside the stator slot, and the first heat exchange structure extends along the circumference of the stator core, a circulation space is formed in the first heat exchange structure, the circulation space has a plurality of spray holes, the plurality of spray holes are evenly spaced and arranged along the circumference of the first heat exchange structure, and the spray holes are formed on a surface of the first heat exchange structure facing the stator winding.

7. The stator assembly according to any one of claims 1 to 5, characterized in that: The two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further comprises: A second heat exchange structure, wherein the second heat exchange structure is arranged at the second end of the stator core, the second heat exchange structure and the stator core jointly define a accommodating space, the end of the second end of the stator winding located outside the stator slot is located in the accommodating space, and the accommodating space is communicated with the heat exchange flow channel.

8. The stator assembly according to claim 7, characterized in that The second heat exchange structure is formed with a receiving groove, the side of the receiving groove facing the stator core is open, and the receiving groove and the stator core together define the receiving space.

9. The stator assembly according to claim 7, characterized in that: The second heat exchange structure includes a first sub-heat exchange structure and a second sub-heat exchange structure, the first sub-heat exchange structure and the second sub-heat exchange structure both extend along the circumference of the stator core, the second sub-heat exchange structure is located radially inside the first sub-heat exchange structure, and the first sub-heat exchange structure, the second sub-heat exchange structure, and the stator core are suitable for jointly defining the accommodating space with the casing of the motor.

10. The stator assembly according to claim 7, characterized in that The two axial ends of the stator winding extend to the outside of the stator slot respectively, and the stator assembly further comprises: A first heat exchange structure, wherein the first heat exchange structure is arranged at a first end in the axial direction of the stator core, the first heat exchange structure is arranged on the outer peripheral side of an end portion of a first end of the stator winding located outside the stator slot, and the first heat exchange structure extends along the circumferential direction of the stator core, a circulation space is formed in the first heat exchange structure, the circulation space has a plurality of spray holes, and the plurality of spray holes are evenly spaced and arranged along the circumferential direction of the first heat exchange structure, the spray holes are formed on a surface of the first heat exchange structure facing the stator winding, and at least one connecting flow channel is formed on the stator core, the connecting flow channel extends along the axial direction of the stator core, and both ends of the connecting flow channel are respectively connected to the circulation space and the accommodating space.

11. The stator assembly according to claim 10, characterized in that An inlet flow channel is formed on the stator core, and the inlet flow channel is communicated with the communication flow channel.

12. The stator assembly according to claim 11, characterized in that The connecting flow channel includes a first connecting flow channel section and a second connecting flow channel section arranged at intervals along the axial direction of the stator core, one of the first connecting flow channel section and the second connecting flow channel section is connected to the accommodating space, the other of the first connecting flow channel section and the second connecting flow channel section is connected to the circulation space, and the inlet flow channel is located between the first connecting flow channel section and the second connecting flow channel section.

13. The stator assembly according to claim 11, characterized in that The inlet flow channel extends along the circumference of the stator core; There are a plurality of the communicating flow channels, and the plurality of the communicating flow channels are arranged at intervals along the circumferential direction of the stator core, and the plurality of the communicating flow channels are all connected to the inlet flow channel.

14. The stator assembly according to claim 11, characterized in that A first groove is formed on the outer circumferential surface of the stator core. The first groove extends along the circumferential direction of the stator core. The first groove is suitable for defining the inlet flow channel together with the inner wall surface of the housing of the motor.

15. The stator assembly according to claim 11, characterized in that At least one second groove is formed on the outer peripheral surface of the stator core. The second groove extends along the axial direction of the stator core. The second groove is suitable for defining the communication flow channel together with the inner wall surface of the housing of the motor.

16. A motor, characterized in that: Comprising a stator assembly according to any one of claims 1-15.

17. A drive assembly, characterized in that: The invention comprises a stator assembly according to any one of claims 1 to 15, or an electric machine according to claim 16.

18. A vehicle, characterized in that: Comprising the motor according to claim 16, or the drive assembly according to claim 17.

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