Stator assembly, motor and vehicle

Abstract

The invention discloses a stator assembly, a motor and a vehicle, and relates to the technical field of motor cooling. The method is used for at least solving the problems of large pressure loss and poor cooling effect of a stator core cooling liquid flow channel. The stator assembly comprises a stator, a first flow dividing piece and a first end cover, the stator comprises a plurality of first cooling channels arranged in the circumferential direction of the stator, and the first flow dividing piece is located at the first end and used for distributing cooling liquid entering the stator to the first cooling channels. The cooling liquid only flows from the first end of the stator to the second end of the stator assembly, the pressure of the cooling liquid flowing in the first cooling channel is stable, the pressure loss is small, and the cooling liquid can smoothly flow in the first cooling channel. Meanwhile, the cooling liquid does not flow back and forth between the first end and the second end, the cooling liquid flows out through the second end cover after exchanging heat with the stator in the cooling channel, and the cooling effect is improved.

Description

Technical Field

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

[0002] The drive motors of new energy vehicles need to continuously improve their speed, torque density and power density while gradually reducing their size. 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.

[0003] In the prior art, water cooling is used for the motor stator, and the cooling medium exchanges heat with the motor stator while flowing along the cooling channel, thereby reducing the temperature of the motor.

[0004] However, in the related art, the pressure loss of the coolant flow channel is large and the cooling effect is poor. Summary of the invention

[0005] Embodiments of the present invention provide a stator assembly, a motor and a vehicle, which are used to at least solve the problem of large pressure loss and poor cooling effect of a coolant flow channel in a stator core.

[0006] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0007] In a first aspect, the present application provides a stator assembly, comprising a stator, a first diverter and a first end cover, wherein the stator comprises a plurality of first cooling channels arranged along the circumference of the stator, the two ends of the stator in the axial direction are respectively a first end and a second end, the first diverter is located at the first end, and the first diverter is used to distribute the coolant entering the stator to the plurality of first cooling channels, wherein the first end cover is located at the second end, and the first end cover is used to discharge the coolant flowing out of the plurality of first cooling channels.

[0008] The coolant only flows from the first end of the stator to the second end of the stator assembly. The pressure of the coolant flowing in the first cooling channel is stable and the pressure loss is small, so that the coolant can flow smoothly in the first cooling channel. At the same time, the coolant only needs to flow from the first end of the stator to the second end, and will not flow back and forth between the first end and the second end. After the coolant exchanges heat with the stator in the cooling channel, it flows out through the second end cover, avoiding the phenomenon that the coolant temperature rises due to continuous heat exchange between the coolant and the stator. The coolant after heat exchange flows out quickly through stable pressure, thereby improving the cooling effect.

[0009] In a possible embodiment, the stator assembly further includes a shell and a second end cover, wherein the stator and the first diverter are located in the shell, the second end cover is located on the side of the first diverter facing away from the stator, and the second end cover is connected to the shell, the second end cover, the shell, the first diverter and the stator form an annular first diverter cavity, the first diverter cavity is located on the outside of the first diverter, and the first diverter cavity is connected to a plurality of first cooling channels.

[0010] In a possible embodiment, the surface of the first diverter member facing the outer shell includes a plurality of first concave areas and a plurality of first convex areas alternately arranged in sequence along the circumference of the first diverter member, and a partial section of the diverter cavity located between the first concave area and the outer shell is a first diverter section, and the plurality of first diverter sections are respectively connected to a plurality of first cooling channels.

[0011] In a possible embodiment, the stator assembly includes a second diverter, which is located in the outer shell of the second end and on the side of the first end cover facing the stator. The second diverter is connected to the first end cover. The second diverter, the first end cover, and the stator form a first annular cooling cavity. The first cooling cavity is located on the inner side of the second diverter, and the first cooling cavity is connected to the plurality of first cooling channels.

[0012] In a possible implementation manner, the second end of the stator includes a first end winding, and the first end winding is located in the first cooling cavity.

[0013] In a possible implementation manner, a surface of the second flow dividing member facing away from the housing includes a plurality of first grooves arranged along the circumference of the second flow dividing member, and the plurality of first grooves are in communication with the plurality of first cooling channels.

[0014] In a possible implementation manner, the plurality of first grooves are recessed from inside to outside along the radial direction of the stator.

[0015] In a possible implementation manner, the plurality of first groove openings are recessed along the circumferential direction of the stator to the bottom of the first groove.

[0016] In a possible implementation manner, the stator includes a plurality of second cooling channels arranged along the circumference of the stator, and the second flow divider is further used to distribute the cooling liquid entering the stator to the plurality of second cooling channels.

[0017] In a possible implementation, the first end cover, the housing, the second flow divider and the stator form an annular second flow divider cavity, the second flow divider cavity is connected to the plurality of second cooling channels, and along the radial direction of the stator, the second flow divider cavity is located outside the second flow divider.

[0018] In a possible embodiment, the surface of the second diverter facing the outer shell includes a plurality of second concave areas and a plurality of second convex areas alternately arranged in sequence along the circumference of the second diverter, and a partial section of the diverter cavity located between the second concave area and the outer shell is respectively connected to the plurality of second cooling channels.

[0019] In a possible implementation, the first flow divider, the second end cover, and the stator form an annular second cooling cavity, the second cooling cavity is located inside the first flow divider, and the second cooling cavity is connected to the plurality of second cooling channels.

[0020] In a possible implementation manner, the first end of the stator includes a second end winding, and the second end winding is located in the second cooling cavity.

[0021] In a possible implementation manner, a surface of the first flow dividing member facing away from the housing includes a plurality of second grooves arranged along the circumference of the first flow dividing member, and the plurality of second grooves are in communication with the plurality of second cooling channels.

[0022] In a possible implementation, the stator assembly further includes a first liquid inlet, which is disposed on the housing or the second end cover, and is communicated with the first diversion cavity.

[0023] In a possible implementation manner, the stator assembly further includes a first liquid outlet, the first liquid outlet is disposed on the first end cover, and the first liquid outlet is communicated with the first cooling cavity.

[0024] In a possible implementation manner, a plurality of first liquid outlets are provided along the circumference of the first end cover.

[0025] In a possible implementation manner, the plurality of first liquid outlets are evenly distributed.

[0026] In a possible implementation manner, at least one of the plurality of first liquid outlets is located above the first end winding of the stator.

[0027] In a second aspect, a motor is provided, comprising a rotor and a stator assembly provided in any one embodiment of the first aspect, wherein the stator assembly cooperates with the rotor to drive the rotor to rotate.

[0028] In a third aspect, a vehicle is provided, the vehicle comprising the motor provided by any one of the embodiments in the second aspect.

[0029] It should be noted that the technical effects brought about by any implementation method in the second aspect and the third aspect can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a stator assembly provided in one embodiment of the present application;

[0032] Figure 2 for Figure 1 A partial cross-sectional schematic diagram of the stator assembly;

[0033] Figure 3 for Figure 1 A schematic diagram of a radial cross section of a stator assembly;

[0034] Figure 4 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0035] Figure 5 A schematic diagram of a first end cover and a second end cover of a stator assembly provided in one embodiment of the present application;

[0036] Figure 6 A schematic structural diagram of a first end cover provided in another embodiment of the present application;

[0037] Figure 7 for Figure 2 A magnified schematic diagram of point B in the middle.

[0038] Reference numerals: 100 - stator assembly;

[0039] 1-stator, 11-first cooling channel; 12-second cooling channel; 13-first end; 131-second end winding; 14-second end; 141-first end winding;

[0040] 2- Shell;

[0041] 3-first flow divider; 31-first concave area; 32-first convex area; 33-second groove; 34-first flow divider cavity; 35-second cooling cavity;

[0042] 4-second flow divider; 41-second concave area; 42-second convex area; 43-first groove; 44-first cooling cavity; 45-second flow divider cavity;

[0043] 5- first end cover;

[0044] 6- second end cover;

[0045] 71-first liquid inlet; 72-second liquid inlet;

[0046] 81 - first liquid outlet; 82 - second liquid outlet. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, when describing pipelines or channels, the "connected" and "connected" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0051] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0052] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0053] With the rapid development of the new energy vehicle industry, the drive motor needs to continuously improve its speed, torque density and power density while gradually reducing its size to meet the demand for high performance. However, the increase in motor speed, torque density and power density will lead to an increase in heat. Therefore, the heat dissipation and cooling structure of the motor is particularly important in ensuring the reliable, stable and efficient operation of the motor.

[0054] However, in the related art, the motor stator is cooled by water, specifically, a curved cooling channel is set around the motor, and the cooling medium exchanges heat with the stator through flow, thereby reducing the motor temperature. However, in the related art, the coolant is affected by the length of the coolant channel during its flow in the channel, resulting in large cooling fluid loss in the second half of the coolant channel, and the coolant flow rate decreases, which makes it impossible to quickly remove heat by flowing, resulting in reduced heat dissipation efficiency of the motor.

[0055] At the same time, affected by the length of the coolant channel, the temperature of the coolant inside the second half of the coolant channel rises after heat exchange in the first half. There is a situation where the second half cannot continue to exchange heat with the motor, resulting in reduced heat exchange efficiency.

[0056] like Figures 1 to 3 As shown, in order to at least solve the above technical problems, the present application provides a stator assembly 100 .

[0057] The stator assembly 100 includes a stator 1, a first flow divider 3 and a first end cover 5, wherein the stator 1 includes a plurality of first cooling channels 11 arranged along the circumference of the stator 1, the first cooling channels 11 are used to circulate cooling liquid, and the two ends of the stator 1 along the axial direction are a first end 13 and a second end 14 respectively.

[0058] The first flow divider 3 is located at the first end 13 and is used to distribute the coolant entering the stator 1 to the plurality of first cooling channels 11 , wherein the first end cover 5 is located at the second end 14 and is used to discharge the coolant flowing out of the plurality of first cooling channels 11 .

[0059] Through the above technical solution, after the coolant enters the stator assembly 100 from the first end 13, the first flow divider 3 divides the coolant to the multiple first cooling channels 11. After the coolant exchanges heat with the stator 1 in the first cooling channel 11, it flows to the second end 14 and flows out of the stator assembly 100 through the first end cover 5. In this process, the coolant only flows from the first end 13 of the stator 1 to the second end 14 of the stator assembly 100. The pressure of the coolant when flowing in the first cooling channel 11 is stable, and the pressure loss is small, so that the coolant can flow smoothly in the first cooling channel 11.

[0060] At the same time, the coolant only flows from the first end 13 to the second end 14 of the stator 1, and does not flow back and forth between the first end 13 and the second end 14. The coolant flows out through the first end cover 5 after exchanging heat with the stator 1 in the cooling channel, thereby avoiding the phenomenon that the coolant temperature rises due to continuous heat exchange between the coolant and the stator 1. The coolant after heat exchange flows out quickly through stable pressure, thereby improving the cooling effect.

[0061] The embodiments of the present application are described in detail below in conjunction with the accompanying drawings, and before describing the embodiments of the present application in detail, the application scenarios of the embodiments of the present application are first described.

[0062] The stator assembly 100 provided in the present application is applied to a motor. The motor may be a large motor such as a generator set, a mining motor, etc.; the motor may also be a motor requiring high speed and high power density; the motor may also be a motor operating in a harsh environment in industries such as metallurgy and chemical industry; the motor may also be a large-scale power split generator, etc.; the motor may also be a motor applied to a vehicle.

[0063] Among them, the vehicle can be an electric vehicle that uses electricity as energy; the vehicle can also be a hybrid vehicle that uses electricity and other energy at the same time; the vehicle can also be an electric energy bus, electric energy truck, electric energy logistics vehicle, electric energy sedan, electric energy SUV, electric energy unmanned vehicle, etc.

[0064] Combination Figures 1 to 4 As shown, in a possible implementation, the stator assembly 100 further includes a housing 2 and a second end cover 6, wherein the stator 1 and the first diverter 3 are located in the housing 2, the first diverter 3 is connected to the stator 1, and the first diverter 3 is spaced apart from the housing 2, the second end cover 6 is located on the side of the first diverter 3 facing away from the stator 1, and the second end cover 6 is connected to the housing 2 and the first diverter 3. The second end cover 6, the housing 2, the first diverter 3 and the stator 1 form an annular first diverter cavity 34, the first diverter cavity 34 is located outside the first diverter 3, and the first diverter cavity 34 is connected to the plurality of first cooling channels 11.

[0065] Specifically, along the radial direction of the stator 1 , the first flow dividing cavity 34 is located outside the first flow dividing member 3 .

[0066] When the coolant is injected into the first diversion cavity 34 , the coolant in the first diversion cavity 34 is squeezed by the injected coolant and flows evenly into the multiple first diversion channels. The uniform flow distribution can improve the utilization rate of the coolant and reduce the accumulation of the coolant in the first diversion cavity 34 .

[0067] At the same time, the uniform flow distribution can evenly cool the stator 1, prevent local overcooling or overheating of the wall surface, improve the cooling efficiency, and thus improve the work efficiency.

[0068] In a possible embodiment, the surface of the first diverter member 3 facing the outer shell 2 includes a plurality of first concave areas 31 and a plurality of first convex areas 32 alternately arranged in sequence along the circumference of the first diverter member 3, and a partial section of the diverter cavity located between the first concave area 31 and the outer shell 2 is a first diverter section, and the plurality of first diverter sections are respectively connected to the plurality of first cooling channels 11.

[0069] The first concave area 31 and the first convex area 32 can increase the flow area of ​​the coolant in the first flow distribution cavity 34 , thereby promoting the flow and distribution of the coolant.

[0070] When the coolant enters the first diversion cavity 34, the alternating arrangement of the first convex area 32 and the first concave area 31 can increase the disturbance of the coolant, reduce the dead zone that may be formed during the flow of the coolant in the first diversion cavity 34, make the coolant circulate fully, and reduce the waste of coolant.

[0071] At the same time, along the circumference of the first diverter 3, first convex areas 32 are respectively arranged on both sides of a first concave area 31. The first convex area 32 has a guiding effect on the coolant, causing the coolant to flow toward the concave area. When the coolant enters the concave area, it enters the first diverter section, which facilitates the guiding of the coolant to the first cooling channel 11.

[0072] It should be noted that the shape of the motor stator 1 is generally cylindrical, and the housing 2 is arranged outside the stator 1, and has a shape similar to the stator 1, and is also arranged to be cylindrical. In some other possible embodiments, the housing 2 can also be other shapes. This application will further explain by taking the example that the stator 1 and the housing 2 can be approximately cylindrical.

[0073] Continue to see Figure 1-Figure 3 In a possible implementation manner, the stator assembly 100 further includes a first liquid inlet 71 , which is in communication with the first flow-dividing chamber 34 . The first liquid inlet 71 is used to fill the first flow-dividing chamber 34 with coolant.

[0074] Exemplarily, the first liquid inlet 71 may be installed on the housing 2, or the first liquid inlet 71 may be disposed on the second end cover 6. The location of the first liquid inlet 71 may be configured according to actual use conditions.

[0075] The first liquid inlet 71 is suitable for being connected to an external cooling liquid circulation system or an external cooling liquid storage device.

[0076] In a possible implementation, the stator assembly 100 includes a second flow divider 4, which is located in the housing 2 at the second end 14 and on the side of the first end cover 5 facing the stator 1. The second flow divider 4 is connected to the first end cover 5, and the second flow divider 4 is also connected to the stator 1. The second flow divider 4, the first end cover 5, and the stator 1 form an annular first cooling cavity 44, which is located on the inner side of the second flow divider 4, and the first cooling cavity 44 is connected to the plurality of first cooling channels 11.

[0077] Specifically, along the radial direction of the stator 1, the first cooling cavity 44 is located on the inner side of the second flow divider 4, and along the axial direction of the stator 1, the first cooling cavity 44 is located at the second end 14 of the stator 1. The first cooling cavity 44 can cool the second end 14 of the stator 1, thereby reducing the temperature of the stator 1 and improving the overall heat dissipation efficiency.

[0078] In a possible implementation, the second end 14 of the stator 1 includes a first end winding 141 , and the first end winding 141 is located in the first cooling cavity 44 .

[0079] The first end winding 141 is placed in the first cooling cavity 44, and the first end winding 141 can be directly cooled by the coolant to reduce the working temperature of the winding.

[0080] When the motor is not in operation, the first cooling chamber 44 is filled with coolant, and the first end winding 141 is immersed in the coolant. When the motor is in operation, the continuously flowing coolant can remove the heat generated by the first end winding 141. Immersing the first end winding 141 in the coolant can improve the heat exchange efficiency, thereby improving the cooling effect of the first end winding 141.

[0081] like Figure 5 As shown, combined with Figure 2 and Figure 3 As shown, in a possible implementation manner, the surface of the second flow divider 4 facing away from the housing 2 includes a plurality of first grooves 43 arranged along the circumference of the second flow divider 4 , and the plurality of first grooves 43 are connected to the plurality of first cooling channels 11 .

[0082] The coolant in the first cooling channel 11 can flow into the first cooling cavity 44 through the first groove 43. The first groove 43 can make the coolant quickly mixed in the first cooling cavity 44, and the coolant flowing out of multiple first cooling channels 11 is mixed to avoid local overheating and keep the overall temperature of the stator 1 balanced.

[0083] In a possible implementation, the plurality of first grooves 43 are recessed from inside to outside along the radial direction of the stator 1. In this way, the notches of the plurality of first grooves 43 face the axis of the stator 1, and when the notches of the plurality of first grooves 43 discharge coolant into the first cooling cavity 44 at the same time, the coolant can be quickly mixed with the coolant in the first cooling cavity 44.

[0084] like Figure 6 As shown, in a possible embodiment, the plurality of first grooves 43 are connected to the bottom of the first groove 43 along the stator 1 (see Figure 2 When the notches of the plurality of first grooves 43 inject coolant into the first cooling cavity 44, the disturbance of the coolant in the first cooling cavity 44 can be increased, thereby improving the coolant fluidity.

[0085] This can enhance the mixing effect of the coolant in the first cooling cavity 44 and the injected coolant, and can also reduce the stagnant area of ​​the coolant in the first cooling cavity 44, reducing the formation of deposits. In addition, the coolant can flow more evenly to various areas of the first cooling cavity 44, preventing local overheating.

[0086] like Figure 5 and Figure 6 As shown, in a possible implementation, the stator assembly 100 further includes a first liquid outlet 81, which is disposed on the first end cover 5 and communicates with the first cooling cavity 44. The first liquid outlet 81 is used to discharge the coolant in the first cooling cavity 44.

[0087] The first liquid outlet 81 is suitable for connecting to an external coolant circulation system or an external coolant storage device.

[0088] If the cross-sectional area of ​​the first liquid outlet 81 is smaller than that of the first liquid inlet 71 (see Figure 1 ) may cause greater resistance to the coolant during the flow process, thereby increasing energy consumption. The cross-sectional area of ​​the first liquid outlet 81 needs to be greater than or equal to the cross-sectional area of ​​the first liquid inlet 71 to reduce the coolant flow resistance and reduce energy consumption.

[0089] In a possible implementation, a plurality of first liquid outlets 81 are provided along the circumference of the first end cover 5. The plurality of first liquid outlets 81 can allow the coolant to flow out from different first liquid outlets 81, thereby evenly distributing the flow rate and improving the drainage efficiency. At the same time, the redundant provision of the plurality of first liquid outlets 81 can improve the reliability of the first liquid outlets 81.

[0090] In a possible implementation, the plurality of first liquid outlets 81 are evenly distributed, so that the coolant in the first cooling cavity 44 can flow out evenly, avoiding the problem of local outflow, and can also improve the mixing effect of the coolant in the first cooling cavity 44.

[0091] In a possible implementation manner, at least one of the plurality of first liquid outlets 81 is located at the first end winding 141 (see Figure 3 ) above.

[0092] At least one liquid outlet is located above the first end winding 141 so that the cooling liquid can completely immerse the first end winding 141 , thereby ensuring the overall heat dissipation effect of the first end winding 141 .

[0093] Continue to see Figure 1-Figure 3 In a possible implementation, the stator 1 includes a plurality of second cooling channels 12 arranged along the circumference of the stator 1 , and the second flow divider 4 is further used to distribute the coolant entering the second end 14 of the stator 1 to the plurality of second cooling channels 12 .

[0094] Through the above technical solution, after the coolant enters the stator assembly 100 from the second end 14, the second diverter 4 diverts the coolant to multiple second cooling channels 12. After the coolant exchanges heat with the stator 1 in the second cooling channels 12, it flows to the first end 13 and flows out of the stator assembly 100 through the second end cover 6.

[0095] The coolant in the first cooling channel 11 flows from the first end 13 to the second end 14 , and the coolant in the second cooling channel 12 flows from the second end 14 to the first end 13 .

[0096] Exemplarily, the second cooling channel 12 and the first cooling channel 11 are arranged in sequence and spaced apart from each other, so that the heat dissipation can be uniform and the heat dissipation effect can be improved.

[0097] Combination Figure 1-Figure 3 , Figure 7 As shown in a possible embodiment, the first end cover 5, the outer shell 2, the second diverter 4 and the stator 1 form an annular second diverter chamber 45, and the second diverter chamber 45 is connected to the plurality of second cooling channels 12. Along the radial direction of the stator 1, the second diverter chamber 45 is located on the outside of the second diverter 4, and at the same time, the second diverter chamber 45 is located on the outside of the first cooling chamber 44.

[0098] When the coolant is injected into the second diversion chamber 45 , the coolant in the second diversion chamber 45 is squeezed by the injected coolant and flows evenly into the multiple second diversion channels. The uniform flow distribution can improve the utilization rate of the coolant and reduce the accumulation of coolant in the second diversion chamber 45 .

[0099] The first concave area 31 and the first convex area 32 can increase the flow area of ​​the coolant in the first flow distribution cavity 34 , thereby promoting the flow and distribution of the coolant.

[0100] In one possible embodiment, the surface of the second diverter member 4 facing the outer shell 2 includes a plurality of second concave areas 41 and a plurality of second convex areas 42 alternately arranged in sequence along the circumference of the second diverter member 4, and the portion of the diverter cavity located between the second concave area 41 and the outer shell 2 is a second diverter section, and the plurality of second diverter sections are respectively connected to a plurality of second cooling channels 12.

[0101] When the coolant enters the second diversion cavity 45, the alternating arrangement of the second convex area 42 and the second concave area 41 can increase the disturbance of the coolant, reduce the dead zone that may be formed during the flow of the coolant in the second diversion cavity 45, make the coolant circulate fully, and reduce the waste of coolant.

[0102] At the same time, along the circumference of the second diverter 4, second convex areas 42 are respectively arranged on both sides of a second concave area 41. The second convex area 42 has a guiding effect on the coolant, causing the coolant to flow toward the concave area. When the coolant enters the concave area, it enters the second diverter section, which facilitates the guiding of the coolant to the second cooling channel 12.

[0103] In a possible implementation manner, the stator assembly 100 further includes a second liquid inlet 72 (eg, Figure 2 As shown in FIG. 4 , the second liquid inlet 72 is connected to the second flow-dividing chamber 45. The second liquid inlet 72 is used to fill the cooling liquid into the first flow-dividing chamber 34. The second liquid inlet 72 and the first liquid inlet 71 can be arranged at intervals or staggered along the axial direction of the housing.

[0104] Exemplarily, the second liquid inlet 72 may be installed on the housing 2, or the second liquid inlet 72 may be disposed on the first end cover 5. The location of the second liquid inlet 72 may be configured according to actual use conditions.

[0105] The second liquid inlet 72 is suitable for being connected to an external cooling liquid circulation system or an external cooling liquid storage device.

[0106] In a possible implementation, the first flow divider 3 , the second end cover 6 , and the stator 1 form an annular second cooling cavity 35 . The second cooling cavity 35 is located inside the first flow divider 3 . The second cooling cavity 35 is connected to the plurality of second cooling channels 12 .

[0107] Specifically, the second cooling cavity 35 is located inside the first diverter cavity 34 , and both the second cooling cavity 35 and the first diverter cavity 34 are located at the first end 13 of the stator 1 .

[0108] In a possible implementation, the first end 13 of the stator 1 includes a second end winding 131, and the second end winding 131 is located in the second cooling cavity 35. By placing the second end winding 131 in the second cooling cavity 35, the second end winding 131 can be directly cooled by a coolant to reduce the working temperature of the winding.

[0109] In a possible implementation, the surface of the first flow dividing member 3 facing away from the housing 2 includes a plurality of second grooves 33 arranged along the circumference of the first flow dividing member 3 , and the plurality of second grooves 33 are in communication with the plurality of second cooling channels 12 .

[0110] The coolant in the second cooling channel 12 can flow into the second cooling cavity 35 through the second groove 33. The second groove 33 can make the coolant quickly mixed in the second cooling cavity 35, and the coolant flowing out of multiple second cooling channels 12 is mixed to avoid local overheating and keep the overall temperature of the stator 1 balanced.

[0111] In the present application, the first end cap 5 and the second end cap 6 have the same structure, the first diverter 3 and the second diverter 4 also have the same structure, and the difference between the first diverter 3 and the second diverter 4 is only the position. The beneficial effects of the second diverter 4 can be derived from the first diverter 3.

[0112] In a possible implementation manner, the stator assembly 100 further includes a second liquid outlet 82 (eg, Figure 5 As shown), the second liquid outlet 82 is disposed on the second end cover 6, and the second liquid outlet 82 is connected to the second cooling chamber 35 (as shown Figure 4 The second liquid outlet 82 is used to discharge the coolant in the second cooling cavity 35.

[0113] The embodiments and beneficial effects of the second liquid outlet 82 may refer to the embodiments and beneficial effects of the first liquid outlet 81 .

[0114] The present application also provides a motor, which includes a rotor and the above-mentioned stator assembly 100, and the stator assembly 100 cooperates with the rotor to drive the rotor to rotate.

[0115] The present application also provides a vehicle, which includes the above-mentioned motor.

[0116] The embodiments of the motor and the vehicle have been described in the application scenarios of the stator assembly 100 above and will not be described in detail here.

[0117] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprise" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in a claim. Certain measures are recorded in mutually different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0118] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0119] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A stator assembly (100), characterized in that: include: A stator assembly (100) comprises a plurality of first cooling channels (11) arranged along the circumference of the stator assembly (100), wherein two ends of the stator assembly (100) in the axial direction are respectively a first end (13) and a second end (14); A first flow divider (3) located at the first end (13), the first flow divider (3) being used to distribute the cooling liquid entering the stator assembly (100) to the plurality of first cooling channels (11); A first end cover (5) is located at the second end (14), and the first end cover (5) is used to discharge the cooling liquid flowing out of the plurality of first cooling channels (11).

2. The stator assembly (100) according to claim 1, characterized in that: include: A housing (2), wherein the stator assembly (100) and the first flow divider (3) are located inside the housing (2); A second end cover (6), the second end cover (6) is located on a side of the first flow divider (3) facing away from the stator assembly (100), and the second end cover (6) is connected to the housing (2), the second end cover (6), the housing (2), the first flow divider (3) and the stator assembly (100) form an annular first flow divider cavity (34), the first flow divider cavity (34) is located on the outside of the first flow divider (3), and the first flow divider cavity (34) is connected to the plurality of first cooling channels (11).

3. The stator assembly (100) according to claim 2, characterized in that: The surface of the first flow dividing member (3) facing the shell (2) comprises a plurality of first concave areas (31) and a plurality of first convex areas (32) which are arranged alternately in sequence along the circumference of the first flow dividing member (3); a partial section of the flow dividing cavity located between the first concave area (31) and the shell (2) is a first flow dividing section; and the plurality of first flow dividing sections are respectively connected to the plurality of first cooling channels (11).

4. The stator assembly (100) according to claim 2, characterized in that: include: a second flow divider (4), located in the housing (2) at the second end (14) and on a side of the first end cover (5) facing the stator assembly (100), the second flow divider (4) being connected to the first end cover (5); The second flow divider (4), the first end cover (5), and the stator assembly (100) form an annular first cooling cavity (44); the first cooling cavity (44) is located on the inner side of the second flow divider (4); and the first cooling cavity (44) is connected to the plurality of first cooling channels (11).

5. The stator assembly (100) according to claim 4, characterized in that: The second end (14) of the stator assembly (100) includes a first end winding (141), and the first end winding (141) is located in the first cooling cavity (44).

6. The stator assembly (100) according to claim 4, characterized in that: The surface of the second flow dividing member (4) facing away from the housing (2) comprises a plurality of first grooves (43) arranged along the circumference of the second flow dividing member (4), and the plurality of first grooves (43) are in communication with the plurality of first cooling channels (11).

7. The stator assembly (100) according to claim 6, characterized in that: The plurality of first grooves (43) are recessed from inside to outside along the radial direction of the stator assembly (100).

8. The stator assembly (100) according to claim 7, characterized in that: The plurality of first grooves (43) are recessed along the circumferential direction of the stator assembly (100) from the notches to the bottom of the first grooves (43).

9. The stator assembly (100) according to claim 4, characterized in that: The stator assembly (100) comprises a plurality of second cooling channels (12) arranged along the circumference of the stator assembly (100); The second flow divider (4) is also used to distribute the cooling liquid entering the stator assembly (100) to the plurality of second cooling channels (12).

10. The stator assembly (100) according to claim 9, characterized in that: The first end cover (5), the housing (2), the second flow divider (4) and the stator assembly (100) form an annular second flow divider cavity (45), and the second flow divider cavity (45) is connected to the plurality of second cooling channels (12); Along the radial direction of the stator assembly (100), the second flow dividing cavity (45) is located outside the second flow dividing member (4).

11. The stator assembly (100) according to claim 10, characterized in that: The surface of the second flow dividing member (4) facing the outer shell (2) comprises a plurality of second concave areas (41) and a plurality of second convex areas (42) which are arranged alternately in sequence along the circumference of the second flow dividing member (4); a partial section of the flow dividing cavity located between the second concave area (41) and the outer shell (2) is a second flow dividing section; and the plurality of second flow dividing sections are respectively connected to the plurality of second cooling channels (12).

12. The stator assembly (100) according to claim 9, characterized in that The first flow divider (3), the second end cover (6), and the stator assembly (100) form an annular second cooling cavity (35); the second cooling cavity (35) is located inside the first flow divider (3); and the second cooling cavity (35) is connected to the plurality of second cooling channels (12).

13. The stator assembly (100) according to claim 12, characterized in that: The first end (13) of the stator assembly (100) includes a second end winding (131), and the second end winding (131) is located in the second cooling cavity (35).

14. The stator assembly (100) according to claim 12, characterized in that: The surface of the first flow dividing member (3) facing away from the housing (2) comprises a plurality of second grooves (33) arranged along the circumference of the first flow dividing member (3), and the plurality of second grooves (33) are in communication with the plurality of second cooling channels (12).

15. The stator assembly (100) according to claim 2, characterized in that: include: A first liquid inlet (71) is provided on the housing (2) or the second end cover (6), and the first liquid inlet (71) is in communication with the first flow distribution cavity (34).

16. The stator assembly (100) according to claim 5, characterized in that include: A first liquid outlet (81) is provided on the first end cover (5), and the first liquid outlet (81) is in communication with the first cooling chamber (44).

17. The stator assembly (100) according to claim 16, characterized in that A plurality of first liquid outlets (81) are provided along the circumference of the first end cover (5).

18. The stator assembly (100) according to claim 17, characterized in that The multiple first liquid outlets (81) are evenly distributed.

19. The stator assembly (100) according to claim 17, characterized in that: At least one of the plurality of first liquid outlets (81) is located above a first end winding (141) of the stator assembly (100).

20. A motor, characterized in that: It comprises a rotor and a stator assembly (100) according to any one of claims 1 to 19, wherein the stator assembly (100) cooperates with the rotor to drive the rotor to rotate.

21. A vehicle, characterized in that: Includes the motor as claimed in claim 20.

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