Stator cooling structure, stator, motor, power assembly and vehicle

Abstract

The invention discloses a stator cooling structure, a stator, a motor, a power assembly and a vehicle, and belongs to the technical field of vehicles. The stator cooling structure comprises a shell, the shell is used for containing a stator, a cooling cavity is defined by the shell and the stator, the shell is provided with a first cooling medium channel, the stator is provided with a second cooling medium channel, and the first cooling medium channel is communicated with the second cooling medium channel. And the first cooling medium channel is communicated with the cooling chamber through the second cooling medium channel.

Description

Stator cooling structure, stator, motor, powertrain and vehicle Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a stator cooling structure, a stator, a motor, a powertrain, and a vehicle. Background Technology

[0002] The electric motor is a core component of a vehicle, enabling it to drive the vehicle. Axial flux motors, as a type of electric motor, are also known as disc motors.

[0003] Axial flux motors generate considerable heat during operation. To improve their efficiency, the stator needs to be cooled. Current technology involves injecting a cooling medium into the axial flux motor to cool the stator.

[0004] However, the above cooling method has the drawback that the cooling medium cannot make sufficient contact with the stator, resulting in poor cooling effect of the stator. Summary of the Invention

[0005] This application discloses a stator cooling structure, a stator, a motor, a powertrain, and a vehicle, to solve or at least partially solve the problem in the prior art where the cooling medium cannot fully contact the stator, resulting in poor stator cooling effect.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, this application discloses a stator cooling structure, the stator cooling structure including a housing for accommodating a stator, the housing and the stator enclosing each other to form a cooling chamber, the housing being provided with a first cooling medium channel, the stator being provided with a second cooling medium channel, the first cooling medium channel communicating with the cooling chamber through the second cooling medium channel.

[0008] Optionally, the second cooling medium channel is disposed in the stator core of the stator, and the cooling medium in the second cooling medium channel is used to cool one side of the stator core.

[0009] Optionally, the second cooling medium channel includes a first sub-cooling medium channel, which extends radially along the stator and communicates with the first cooling medium channel and the cooling chamber.

[0010] Optionally, the first sub-cooling medium channel includes a plurality of channels, which are arranged at intervals along the circumference of the stator.

[0011] Optionally, the second cooling medium channel further includes a second sub-cooling medium channel, which extends circumferentially along the stator and is connected to the first sub-cooling medium channel and the first cooling medium channel, so that the cooling medium in the first cooling medium channel can enter the first sub-cooling medium channel through the second sub-cooling medium channel.

[0012] Optionally, the second sub-cooling medium channel includes a plurality of channels, which are arranged at radial intervals along the stator.

[0013] Optionally, both the first sub-cooling medium channel and the second sub-cooling medium channel are disposed in the stator core of the stator.

[0014] Optionally, the cooling chamber includes a first cooling chamber and a second cooling chamber, both of which are connected to the first sub-cooling medium channel; the first cooling chamber and the second cooling chamber are spaced apart along the radial direction of the stator, and the first cooling chamber is located outside the second cooling chamber; the first cooling chamber is used to cool the radially outer side of the stator, and the second cooling chamber is used to cool the radially inner side of the stator.

[0015] Optionally, the stator cooling structure further includes a cooling assembly disposed in the first cooling chamber and / or the second cooling chamber, the cooling assembly being able to connect the first cooling medium channel and the second cooling medium channel.

[0016] Optionally, the cooling assembly includes a first cooling element and a second cooling element, which are spaced apart along the radial direction of the stator; the first cooling element is disposed in the first cooling chamber to divide the first cooling chamber into a first sub-cooling chamber and a second sub-cooling chamber, and the cooling medium can enter the second sub-cooling chamber from the first sub-cooling chamber; the second cooling element is disposed in the second cooling chamber to divide the second cooling chamber into a third sub-cooling chamber and a fourth sub-cooling chamber, and the cooling medium can enter the fourth sub-cooling chamber from the third sub-cooling chamber; both the first sub-cooling chamber and the third sub-cooling chamber are in communication with the first sub-cooling medium channel.

[0017] Optionally, the stator winding of the stator at least partially protrudes radially outward from the stator core to form a first end winding, and the stator winding at least partially protrudes radially inward from the stator core to form a second end winding; the second sub-cooling chamber is used to accommodate the first end winding so that the cooling medium contacts the first end winding for heat exchange, and the third sub-cooling chamber is used to accommodate the second end winding so that the cooling medium contacts the second end winding for heat exchange.

[0018] Optionally, the pressure of the cooling medium in the first sub-cooling chamber is greater than the pressure of the cooling medium in the second sub-cooling chamber; the pressure of the cooling medium in the third sub-cooling chamber is greater than the pressure of the cooling medium in the fourth sub-cooling chamber.

[0019] Optionally, the first cooling component includes a first spray ring, on which a first spray hole is provided. The first spray hole is used to spray the cooling medium of the first sub-cooling chamber into the second sub-cooling chamber.

[0020] Optionally, the first spray hole includes a plurality of first spray holes, which are spaced apart circumferentially, axially and / or radially along the first spray ring.

[0021] Optionally, the second cooling component includes a second spray ring, which is provided with a second spray hole for spraying the cooling medium of the third sub-cooling chamber into the fourth sub-cooling chamber.

[0022] Optionally, the second spray hole includes a plurality of holes, which are spaced apart circumferentially, axially and / or radially along the second spray ring.

[0023] Optionally, the first spray ring extends radially along the stator so that the first sub-cooling chamber and the second sub-cooling chamber are spaced apart along the axial direction of the stator; the second spray ring extends radially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are spaced apart along the axial direction of the stator.

[0024] Optionally, the first spray ring extends radially along the stator so that the first sub-cooling chamber and the second sub-cooling chamber are spaced apart along the axial direction of the stator; the second spray ring extends axially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are spaced apart along the radial direction of the stator.

[0025] Optionally, the first spray ring extends along the axial direction of the stator so that the first sub-cooling chamber and the second sub-cooling chamber are distributed radially spaced along the stator; the second spray ring extends radially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are distributed axially spaced along the stator.

[0026] Optionally, the first spray ring extends along the axial direction of the stator so that the first sub-cooling chamber and the second sub-cooling chamber are distributed radially spaced along the stator; the second spray ring extends along the axial direction of the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are distributed radially spaced along the stator.

[0027] Optionally, the stator cooling structure further includes a second sealing ring disposed between the cooling assembly and the housing, so as to seal the cooling assembly and the housing.

[0028] Optionally, it also includes a seal that, together with the housing and the stator, forms the first cooling chamber and the second cooling chamber.

[0029] Optionally, the sealing element includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring being radially spaced along the stator and located outside the second sealing ring; the first sealing ring, together with the housing and the stator, forms the first cooling chamber; the second sealing ring, together with the housing and the stator, forms the second cooling chamber.

[0030] Optionally, the seal further includes a sealing portion disposed between the first sealing ring and the second sealing ring and connected to the first sealing ring and the second sealing ring respectively.

[0031] Optionally, the stator core is provided with a mounting groove extending radially along the stator core on the side near the sealing part, the mounting groove being used to mount the stator winding; the sealing part is a sealing strip, the sealing strip being adapted to be sealed and connected with the mounting groove.

[0032] Optionally, multiple mounting slots are provided, and the multiple mounting slots are spaced apart circumferentially along the stator core; multiple sealing strips are provided, and the multiple sealing strips are spaced apart circumferentially along the sealing element, with one sealing strip embedded in one mounting slot.

[0033] Optionally, the first sealing ring, the second sealing ring, and the sealing strip together form an integrally molded structure.

[0034] Optionally, the seal and the cooling assembly are integrally formed.

[0035] Optionally, the stator cooling structure further includes a first sealing ring, which is disposed between the sealing element and the housing to make the sealing element and the housing sealed together.

[0036] Optionally, the housing includes an end plate, a first side plate, and a second side plate; the end plate is disposed at the end of the stator away from the seal, the first side plate and the second side plate extend circumferentially along the end plate and are spaced apart radially from the stator, and the first side plate is located outside the second side plate; wherein, the end plate, the first side plate, the seal, and the stator enclose to form the first cooling chamber, and the end plate, the second side plate, the seal, and the stator enclose to form the second cooling chamber.

[0037] Optionally, the first cooling medium channel includes a cooling medium inlet channel and a cooling medium outlet channel. The cooling medium inlet channel is connected to the first sub-cooling chamber and the third sub-cooling chamber respectively through the second cooling medium channel, and the cooling medium outlet channel is connected to the second sub-cooling chamber and the fourth sub-cooling chamber respectively.

[0038] Optionally, the cooling medium inlet channel is disposed on the end plate and / or the first side plate; and / or, the cooling medium outlet channel is disposed on the end plate and / or the first side plate.

[0039] Optionally, the cooling medium inlet channel is disposed on the end plate, and the cooling medium inlet channel includes an inlet and a first outlet; the inlet is used to communicate with an external cooling device; the first outlet is communicated with the second cooling medium channel.

[0040] Optionally, the cooling medium outflow channel is disposed on the end plate, and the cooling medium outflow channel includes a second liquid outlet, a third connecting port and a fourth connecting port. The second liquid outlet is used to communicate with an external cooling device. The third connecting port and the fourth connecting port are arranged radially spaced along the stator. The third connecting port communicates with the second sub-cooling chamber, and the fourth connecting port communicates with the fourth sub-cooling chamber.

[0041] Optionally, the cooling medium inlet channel is a liquid inlet, and / or the cooling medium outlet channel is a liquid outlet.

[0042] Secondly, this application also discloses a stator, the stator including the stator cooling structure described in the first aspect.

[0043] Optionally, the stator includes a stator core; a stator winding wound around the stator core, the stator winding protruding at least partially outward from the radial side of the stator core to form a first end winding, and the stator winding protruding at least partially outward from the radial side of the stator core to form a second end winding; the cooling chamber is used to cool the first end winding and / or the second end winding.

[0044] Optionally, the housing includes a first side plate surrounding the stator core, and the side of the first side plate opposite to the stator core has a mounting cavity; the stator also includes a junction box disposed in the mounting cavity, and the junction box is used for electrical connection with the stator winding.

[0045] Thirdly, this application also discloses an electric motor, which includes a rotating shaft, a rotor, and a stator as described in the second aspect; the rotor and the stator are spaced apart axially from each other on the rotating shaft; the rotating shaft passes through the rotor and the stator, and is fixedly connected to the rotor and rotatably connected to the stator so that the rotating shaft can rotate relative to the stator.

[0046] Optionally, there are two stators, which are arranged on opposite axial sides of the rotor.

[0047] Fourthly, this application also discloses a powertrain, which includes the electric motor described in the third aspect.

[0048] Fifthly, this application also discloses a vehicle that includes the electric motor described in the third aspect, or the powertrain described in the fourth aspect.

[0049] This application discloses a stator cooling structure, a stator, a motor, a powertrain, and a vehicle. The stator cooling structure includes a housing for accommodating the stator. The housing and the stator enclose a cooling chamber. The housing is provided with a first cooling medium channel, and the stator is provided with a second cooling medium channel. The first cooling medium channel communicates with the cooling chamber through the second cooling medium channel.

[0050] The stator cooling structure disclosed in this application forms a cooling chamber by enclosing a housing and a stator. The housing is provided with a first cooling medium channel, and the stator is provided with a second cooling medium channel. The first cooling medium channel is connected to the cooling chamber through the second cooling medium channel. The cooling medium can enter the second cooling medium channel from the first cooling medium channel to cool the stator, and then enter the cooling chamber from the second cooling medium channel to cool the stator, thereby improving the cooling efficiency of the stator and improving the performance of the motor. Attached Figure Description

[0051] Figure 1 shows an exploded view of the motor described in an embodiment of this application;

[0052] Figure 2 shows a schematic diagram of the structure of the shell described in an embodiment of this application;

[0053] Figure 3 shows a second structural schematic diagram of the shell described in an embodiment of this application;

[0054] Figure 4 shows a cross-sectional view of the motor described in an embodiment of this application;

[0055] Figure 5 shows a second cross-sectional view of the motor described in an embodiment of this application;

[0056] Figure 6 shows a schematic diagram of the stator structure in an embodiment of this application;

[0057] Figure 7 shows a second structural schematic diagram of the stator described in an embodiment of this application;

[0058] Figure 8 shows a schematic diagram of the stator core structure in an embodiment of this application;

[0059] Figure 9 shows a second structural schematic diagram of the stator core described in an embodiment of this application;

[0060] Figure 10 shows a schematic diagram of the stator winding structure in an embodiment of this application;

[0061] Figure 11 shows a schematic diagram of the structure of the sealing element in an embodiment of this application;

[0062] Figure 12 shows a schematic diagram of the structure of the seal and the cooling assembly in the embodiments of this application.

[0063] Figure label:

[0064] 10: Housing; 11: Cooling medium inlet channel; 12: Cooling medium outlet channel; 13: End plate; 14: First side plate; 15: Second side plate; 16: Mounting cavity;

[0065] 20: Stator; 21: Stator core; 211: Second cooling medium channel; 2111: First sub-cooling medium channel; 2112: Second sub-cooling medium channel; 212: Mounting slot; 22: Stator winding; 221: First end winding; 222: Second end winding; 223: Middle winding;

[0066] 30: Seal; 31: First sealing ring; 32: Second sealing ring; 33: Sealing part;

[0067] 40: Cooling assembly; 41: First cooling element; 411: First spray nozzle; 42: Second cooling element; 421: Second spray nozzle;

[0068] 50: Cooling chamber; 51: First cooling chamber; 511: First sub-cooling chamber; 512: Second sub-cooling chamber; 52: Second cooling chamber; 521: Third sub-cooling chamber; 522: Fourth sub-cooling chamber;

[0069] 60: Shaft;

[0070] 70: Rotor. Detailed Implementation

[0071] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0072] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0073] Referring to Figure 1, an exploded view of the motor described in this application embodiment is shown; referring to Figure 2, a structural schematic diagram of the housing described in this application embodiment is shown; referring to Figure 3, a structural schematic diagram of the housing described in this application embodiment is shown; referring to Figure 4, a cross-sectional view of the motor described in this application embodiment is shown; referring to Figure 5, a cross-sectional view of the housing described in this application embodiment is shown; referring to Figure 6, a structural schematic diagram of the stator described in this application embodiment is shown; referring to Figure 7, a structural schematic diagram of the stator described in this application embodiment is shown; referring to Figure 8, a structural schematic diagram of the stator core described in this application embodiment is shown; referring to Figure 9, a structural schematic diagram of the stator core described in this application embodiment is shown; referring to Figure 10, a structural schematic diagram of the stator winding described in this application embodiment is shown; referring to Figure 11, a structural schematic diagram of the seal described in this application embodiment is shown; referring to Figure 12, a structural schematic diagram of the seal and the cooling assembly described in this application embodiment is shown.

[0074] As shown in Figures 1 to 12, this application discloses a stator cooling structure, which includes a housing 10 for accommodating a stator 20. The housing 10 and the stator 20 enclose a cooling chamber 50. The housing 10 is provided with a first cooling medium channel, and the stator 20 is provided with a second cooling medium channel 211. The first cooling medium channel communicates with the cooling chamber 50 through the second cooling medium channel 211.

[0075] The stator cooling structure disclosed in this application embodiment can cool the stator 20 to reduce the temperature of the stator core 21 and stator winding 22, improve the cooling efficiency of the stator 20, and make the motor performance better.

[0076] The stator cooling structure disclosed in this application includes a housing 10, and a stator 20 is disposed within the housing 10. The housing 10 can accommodate the stator 20. The housing 10 and the stator 20 enclose each other to form a cooling chamber 50, that is, the inner wall of the housing 10 can enclose the stator 20 to form a cooling chamber 50.

[0077] The housing 10 is provided with a first cooling medium channel, and the stator 20 is provided with a second cooling medium channel 211. The first cooling medium channel is connected to the cooling chamber 50 through the second cooling medium channel 211. The cooling medium can enter the second cooling medium channel 211 from the first cooling medium channel to cool the stator 20, and then enter the cooling chamber 50 from the second cooling medium channel 211 to cool the ends and some sides of the stator 20, thereby improving the cooling efficiency of the stator 20, optimizing its performance, and thus improving the performance of the motor.

[0078] It should be noted that the cooling medium in this embodiment can be cooling oil, also known as anhydrous coolant. Of course, the above are merely examples of cooling media and are not intended to limit the choice of cooling medium. In practical applications, those skilled in the art can select a suitable cooling medium according to their needs.

[0079] The stator cooling structure disclosed in this application embodiment forms a cooling chamber 50 by enclosing a housing 10 and a stator 20. The housing 10 is provided with a first cooling medium channel, and the stator 20 is provided with a second cooling medium channel 211. The first cooling medium channel communicates with the cooling chamber 50 through the second cooling medium channel 211. The cooling medium can cool the stator core 21 of the stator 20 from the first cooling medium channel and the second cooling medium channel 211. The cooling medium then enters the cooling chamber 50 from the second cooling medium channel 211 to cool the stator winding 22 of the stator 20, thereby improving the cooling efficiency of the stator 20 and making the cooling efficiency of the stator 20 higher.

[0080] Optionally, in this embodiment, the second cooling medium channel 211 is disposed in the stator core 21 of the stator 20, and the cooling medium in the second cooling medium channel 211 can cool one side of the stator core 21. This improves the cooling efficiency of the stator core 21, making the cooling efficiency of the stator core 21 better.

[0081] Optionally, as shown in Figures 6 to 9, the second cooling medium channel 211 in this embodiment includes a first sub-cooling medium channel 2111, which extends radially along the stator 20 and communicates with the first cooling medium channel and the cooling chamber.

[0082] As shown in Figures 6 to 9, the stator 20 in this embodiment includes a stator core 21 and a stator winding 22 wound on the stator core 21. The stator core 21 has a ring-shaped structure. The stator winding 22 at least partially protrudes radially inward from the stator core 23 to form a second end winding 222. The stator winding 22 at least partially protrudes radially outward from the stator core 23 to form a first end winding 221. The portion of the stator winding 22 wound around the axial side of the stator core 21 forms a middle winding 223.

[0083] In this embodiment, the second cooling medium channel 211 is disposed in the stator core 21 of the stator 20, and the cooling medium in the second cooling medium channel 211 is used to cool the axial side of the stator core 21. The cooling medium can enter the axial side of the stator core 21 from the first cooling medium channel to cool the axial end face of the stator core 21, thereby improving the cooling efficiency of the stator 20.

[0084] In this embodiment, the second cooling medium channel 211 includes a first sub-cooling medium channel 2111, which is disposed on the stator core 21 and extends radially along the stator core 21. Cooling medium can enter the first sub-cooling medium channel 2111 from the first cooling medium channel to cool the stator 20, thereby improving the cooling efficiency of the stator 20.

[0085] Optionally, as shown in Figures 6 to 9, the second cooling medium channel 211 in this embodiment further includes a second sub-cooling medium channel 2112. The second sub-cooling medium channel 2112 extends circumferentially along the stator 20 and is connected to the first sub-cooling medium channel 2111 and the first cooling medium channel, so that the cooling medium in the first cooling medium channel can enter the first sub-cooling medium channel through the second sub-cooling medium channel 2112.

[0086] As shown in Figures 6 to 9, the second cooling medium channel 211 in this embodiment of the application further includes a second sub-cooling medium channel 2112, which is also disposed on the stator core 21 and disposed along the circumference of the stator core 21.

[0087] The second sub-cooling medium channel 2112 is connected to the first sub-cooling medium channel 2111 and the first cooling medium channel. The cooling medium enters the first cooling medium channel and flows into the first sub-cooling medium channel 2111 and / or the second sub-cooling medium channel 2112 to cool the stator 20, thereby improving the cooling efficiency of the stator 20 and making the cooling efficiency of the stator 20 better.

[0088] Optionally, as shown in Figures 6 to 9, the first sub-cooling medium channel 2111 in the embodiments of this application includes a plurality of first sub-cooling medium channels 2111, which are arranged at intervals along the circumferential direction of the stator 20.

[0089] As shown in Figures 6 to 9, multiple first sub-cooling medium channels 2111 can be provided in this embodiment of the application. These multiple first sub-cooling medium channels 2111 extend radially along the stator 20 and are arranged at intervals along the circumference of the stator 20. Cooling medium can enter the multiple first sub-cooling medium channels 2111 to cool the stator 20, thereby improving the cooling efficiency of the stator 20 and making its cooling efficiency even better.

[0090] Optionally, the second sub-cooling medium channel 2112 in this embodiment of the application may also include a plurality of second sub-cooling medium channels 2112, which are arranged at radial intervals along the stator 20.

[0091] In this embodiment, the second sub-cooling medium channel 2112 may also include multiple channels, each arranged circumferentially along the stator 20 and radially spaced along the stator 20. Cooling medium can enter the multiple second sub-cooling medium channels 2112 to cool the stator 20, improving its cooling efficiency and making it more efficient.

[0092] It should be noted that, in this embodiment, the second sub-cooling medium channel 2112 may be connected to multiple first sub-cooling medium channels 2111, or it may be connected to only a portion of the multiple first sub-cooling medium channels 2111. This embodiment does not impose specific limitations on this. In practical applications, those skilled in the art can configure it as needed.

[0093] Optionally, as shown in Figures 6 to 9, in the embodiments of this application, the first sub-cooling medium channel 2111 and the second sub-cooling medium channel 2112 are both disposed on the stator core 21 of the stator 20.

[0094] As shown in Figures 6 to 9, the stator 20 in this embodiment includes a stator core 21 and a stator winding 22 wound on the stator core 21. The stator core 21 has a circular ring structure, and the coil is wound on the end face, outer peripheral face and inner peripheral face of the stator core 21 to form the stator winding 22.

[0095] In this embodiment, both the first sub-cooling medium channel 2111 and the second sub-cooling medium channel 2112 are disposed on the stator core 21, so that the stator core 21 is cooled by the cooling medium flowing through the first sub-cooling medium channel 2111 and the second sub-cooling medium channel 2112, thereby improving the cooling efficiency of the stator core 21. Furthermore, after the stator core 21 is cooled, it can also cool the stator winding 22, which also helps to improve the cooling efficiency of the stator winding 22.

[0096] Optionally, as shown in Figures 4 and 5, the cooling chamber 50 in this embodiment includes a first cooling chamber 51 and a second cooling chamber 52, which are connected to a first sub-cooling medium channel. The first cooling chamber 51 and the second cooling chamber 52 are spaced apart along the radial direction of the stator 20, and the first cooling chamber 51 is located outside the second cooling chamber 52. The first cooling chamber 51 is used to cool the radially outer side of the stator 20, and the second cooling chamber 52 is used to cool the radially inner side of the stator 20.

[0097] As shown in Figures 4 and 5, the cooling chamber 50 in this embodiment includes a first cooling chamber 51 and a second cooling chamber 52. The first cooling chamber 51 and the second cooling chamber 52 are connected to a first cooling medium channel, allowing the cooling medium entering through the first cooling medium channel to flow into the first cooling chamber 51 and the second cooling chamber 52. The first cooling chamber 51 and the second cooling chamber 52 are arranged radially apart along the stator 20. The first cooling chamber 51 is located outside the second cooling chamber 52. That is, along the radial direction of the stator 20, the first cooling chamber 51 is closer to the outer side of the stator 20, and the second cooling chamber 52 is closer to the inner side of the stator 20.

[0098] In this embodiment, the first cooling chamber 51 is located near the radially outer side of the stator 20 to cool the radially outer side of the stator 20. The second cooling chamber 52 is located near the radially inner side of the stator 20 to cool the radially inner side of the stator 20. This improves the cooling efficiency of the stator 20, resulting in higher cooling efficiency and better performance.

[0099] Optionally, as shown in Figures 4 and 5, in this embodiment of the application, the stator winding 22 of the stator 20 at least partially protrudes from the radial outer diameter of the stator core to form a first end winding 221, and the stator winding 22 at least partially protrudes from the radial inner diameter of the stator core 21 to form a second end winding 222; a first cooling chamber is used to accommodate the first end winding 221 so that the cooling medium contacts the first end winding 221 for heat exchange, and a second cooling chamber 52 is used to accommodate the second end winding 222 so that the cooling medium contacts the second end winding 222 for heat exchange.

[0100] As shown in Figures 4 and 5, the stator winding 22 in this embodiment includes a stator core 21 and a stator winding 22. The stator winding 22 protrudes radially outward from the stator core 21 to form a first end winding 221, and the stator winding 22 protrudes radially outward from the stator core 21 to form a second end winding 222. That is, along the radial direction of the stator 20, the first end winding 221 is wound on the outer side of the stator 20, and the second end winding 222 is wound on the inner side of the stator 20. This allows the first end winding 221 to be located within the first cooling chamber 51, allowing the cooling medium to contact the first end winding 221 and exchange heat with it, thereby reducing the temperature of the first end winding 221 and improving the cooling efficiency of the stator 20. The second end winding 222 can be located in the second cooling chamber 52, and the cooling medium can contact the second end winding 222 to exchange heat with the second end winding 222, thereby reducing the temperature of the second end winding 222 and improving the cooling efficiency of the stator 20.

[0101] Optionally, the stator cooling structure disclosed in this application embodiment further includes a cooling assembly 40, which is disposed in the first cooling chamber and / or the second cooling chamber, and the cooling assembly 40 can connect the first cooling medium channel and the second cooling medium channel 211.

[0102] The stator cooling structure disclosed in this application embodiment further includes a cooling assembly 40, which is disposed within a first cooling chamber and / or a second cooling chamber. The cooling assembly 40 connects a first cooling medium channel and a second cooling medium channel 211, allowing the cooling medium to pass through the first cooling medium channel and the cooling assembly 40 before entering the first cooling chamber and / or the second cooling chamber to cool at least one axial and radial side of the stator 20. This improves the cooling efficiency of the stator 20, resulting in higher cooling efficiency and superior performance.

[0103] For example, the cooling assembly 40 is spaced apart from the stator 20 along the axial direction of the stator 20. Alternatively, the cooling assembly 40 is spaced apart from the stator 20 along the radial direction of the stator 20. Of course, the above are merely individual examples of the specific placement of the cooling assembly 40 and are not intended to limit this application. In practical applications, those skilled in the art can also set the specific position of the cooling assembly 40 as needed.

[0104] Optionally, as shown in Figures 4 and 5, the cooling assembly 40 in this embodiment includes a first cooling element 41 and a second cooling element 42, which are spaced apart along the radial direction of the stator 20. The first cooling element 41 is disposed in the first cooling chamber 51 to divide the first cooling chamber 51 into a first sub-cooling chamber 511 and a second sub-cooling chamber 512. The cooling medium can enter the second sub-cooling chamber 512 from the first sub-cooling chamber 511. The first end winding 221 is located in the second sub-cooling chamber 512. The second cooling element 42 is disposed in the second cooling chamber 512 to divide the second cooling chamber 512 into a third sub-cooling chamber 521 and a fourth sub-cooling chamber 522. The cooling medium can enter the fourth sub-cooling chamber 522 from the third sub-cooling chamber 521. The second end winding 222 is located in the fourth sub-cooling chamber 522. The first sub-cooling chamber 511 and the third sub-cooling chamber 521 are connected to the first sub-cooling medium channel 2111.

[0105] As shown in Figures 4 and 5, the cooling assembly 40 in this embodiment includes a first cooling element 41 and a second cooling element 42, which are radially spaced apart along the stator 20. The first cooling element 41 is disposed within a first cooling chamber 51, dividing the first cooling chamber 51 into a first sub-cooling chamber 511 and a second sub-cooling chamber 512. A first end winding 221 is located within the second sub-cooling chamber 512. Cooling medium can flow from the first sub-cooling chamber 511 into the second sub-cooling chamber 512 to cool the first end winding 221, thereby improving the cooling efficiency of the first end winding 221 and making its cooling efficiency higher.

[0106] In this embodiment, the second cooling element 42 is disposed within the second cooling chamber 52, dividing the second cooling chamber 52 into a third sub-cooling chamber 521 and a fourth sub-cooling chamber 522. The second end winding 222 is located within the fourth sub-cooling chamber 522. Cooling medium can flow from the third sub-cooling chamber 521 into the fourth sub-cooling chamber 522 to cool the second end winding 222, thereby improving the cooling efficiency of the second end winding 222 and making the cooling efficiency of the second end winding 222 higher.

[0107] In this embodiment, the first sub-cooling chamber 511 and the third sub-cooling chamber 521 are connected to the first sub-cooling medium channel 2111, allowing the cooling medium to enter the first sub-cooling chamber 511 and the third sub-cooling chamber 521 from the first sub-cooling medium channel 2111. The cooling medium can also enter the fourth sub-cooling chamber 522 from the third sub-cooling chamber 521 to cool the radially inner side of the stator 20. The cooling medium can also enter the second sub-cooling chamber 512 from the first sub-cooling chamber 511 to cool the radially outer side of the stator 20.

[0108] Optionally, in this embodiment of the application, the first cooling medium channel includes a cooling medium inlet channel and a cooling medium outlet channel. The cooling medium enters the first sub-cooling chamber 511 from the cooling medium inlet channel, and is sprayed into the second sub-cooling chamber 512 through the first cooling element, flows through the second cooling medium channel, and enters the cooling medium outlet channel; and / or, the cooling medium enters the third sub-cooling chamber 521 from the cooling medium inlet channel, and is sprayed into the fourth sub-cooling chamber 522 through the second cooling element, flows through the second cooling medium channel, and enters the cooling medium outlet channel.

[0109] In this embodiment, the cooling medium can flow into the first sub-cooling chamber 511 from the cooling medium inlet channel. The cooling medium in the first sub-cooling chamber 511 flows through the first cooling element and is sprayed into the second sub-cooling chamber 512 to cool the first end winding 221. Then it flows through the second cooling medium channel 211 and enters the cooling medium outlet channel, flowing out of the stator cooling structure.

[0110] In this embodiment, the cooling medium can also flow into the third sub-cooling chamber 521 from the cooling medium inlet channel. The cooling medium in the third sub-cooling chamber 521 flows through the second cooling element and is sprayed into the fourth sub-cooling chamber 522 to cool the second end winding 222. Then it flows through the second cooling medium channel 211 and enters the cooling medium outlet channel, flowing out of the stator cooling structure.

[0111] Optionally, in this embodiment, the pressure of the cooling medium in the first sub-cooling chamber 511 is greater than the pressure of the cooling medium in the second sub-cooling chamber 512; and the pressure of the cooling medium in the third sub-cooling chamber 521 is greater than the pressure of the cooling medium in the fourth sub-cooling chamber 522.

[0112] In this embodiment, the pressure of the cooling medium in the first sub-cooling chamber 511 is greater than the pressure of the cooling medium in the second sub-cooling chamber 512. That is, there is a pressure difference between the first sub-cooling chamber 511 and the second sub-cooling chamber 512, allowing the cooling medium in the first sub-cooling chamber 511 to be injected into the second sub-cooling chamber 512 at a higher injection pressure. On one hand, the higher injection pressure allows the ejected cooling medium to be finer, thereby further increasing the contact area between the cooling medium and the first end winding 221. On the other hand, since the first end winding 221 includes multiple wires, the higher injection pressure allows the cooling medium to enter the gaps between adjacent wires, thereby further improving the sufficiency and uniformity of cooling the first end winding 221.

[0113] Similarly, in this embodiment, the pressure of the cooling medium in the third sub-cooling chamber 521 is greater than the pressure of the cooling medium in the fourth sub-cooling chamber 522. That is, there is a pressure difference between the third sub-cooling chamber 521 and the fourth sub-cooling chamber 522, allowing the cooling medium in the third sub-cooling chamber 521 to be injected into the fourth sub-cooling chamber 522 at a higher injection pressure. On one hand, the higher injection pressure makes the injected cooling medium finer, thereby further increasing the contact area between the cooling medium and the second end winding 222. On the other hand, the second end winding 222 includes multiple wires, and the higher injection pressure allows the cooling medium to enter the gaps between adjacent wires, thereby further improving the sufficiency and uniformity of cooling the second end winding 222.

[0114] Optionally, in this embodiment, the first spray ring is provided with a first spray hole 411, which is used to spray the cooling medium in the first sub-cooling chamber 511 into the second sub-cooling chamber 512 to cool the first end winding 221; the second spray ring is provided with a second spray hole 421, which is used to spray the cooling medium in the third sub-cooling chamber 521 into the fourth sub-cooling chamber 522 to cool the second end winding 222.

[0115] In this embodiment, a first spray hole 411 is provided on the first spray ring so that the cooling medium in the first sub-cooling chamber 511 can be sprayed into the second sub-cooling chamber 512 through the first spray hole 411 to cool the first end winding 221. A second spray hole 421 is provided on the second spray ring so that the cooling medium in the third sub-cooling chamber 521 can be sprayed into the fourth sub-cooling chamber 522 through the second spray hole 421 to cool the second end winding 222.

[0116] It should be noted that the first spray hole 411 in this embodiment may include only one or more, with the multiple first spray holes 411 arranged at intervals. The second spray hole 421 may include only one or more, with the multiple second spray holes 421 arranged at intervals.

[0117] Optionally, in this embodiment of the application, the first spray hole 411 includes a plurality of holes, and the plurality of first spray holes 411 are arranged at intervals along the circumference of the first spray ring; the second spray hole 421 includes a plurality of holes, and the plurality of second spray holes 421 are arranged at intervals along the circumference of the second spray ring.

[0118] In this embodiment of the application, a plurality of first spray holes 411 are provided on the first spray ring, and the plurality of first spray holes 411 are arranged at intervals along the circumference of the first spray ring, so that the cooling medium can be sprayed into the second sub-cooling chamber 512 from the plurality of first spray holes 411, so that the cooling medium is sprayed more evenly and the cooling effect is better.

[0119] In this embodiment of the application, a plurality of second spray holes 421 are provided on the second spray ring. The plurality of second spray holes 421 are arranged at intervals along the circumference of the second spray ring so that the cooling medium can be sprayed into the fourth sub-cooling chamber 522 from the plurality of second spray holes 421, so that the cooling medium is sprayed more evenly and the cooling effect is better.

[0120] Optionally, in the embodiments of this application, the first spray ring includes a plurality of rings, which are spaced apart along the axial direction of the stator 20; and / or, the second spray ring includes a plurality of rings, which are spaced apart along the axial direction of the stator 20.

[0121] In this embodiment, the first spray ring may include multiple first spray rings, which are spaced apart along the axial direction of the stator 20, so that the cooling medium is sprayed into the second sub-cooling chamber 512 through the multiple first spray rings, so that the cooling medium is sprayed more evenly and the cooling effect is better.

[0122] In this embodiment, the second spray ring may also include multiple rings. Multiple second spray rings are spaced apart along the axial direction of the stator 20 so that the cooling medium is sprayed into the fourth sub-cooling chamber 522 through multiple second spray rings, so that the cooling medium is sprayed more evenly and the cooling effect is better.

[0123] In this application, there are multiple ways to configure the first and second spray rings.

[0124] For example, the first spray ring extends radially along the stator 20 so that the first sub-cooling chamber 511 and the second sub-cooling chamber 512 are spaced apart along the axial direction of the stator 20; the second spray ring extends radially along the stator 20 so that the third sub-cooling chamber 521 and the fourth sub-cooling chamber 522 are spaced apart along the axial direction of the stator 20.

[0125] For example, the first spray ring extends radially along the stator 20 so that the first sub-cooling chamber 511 and the second sub-cooling chamber 512 are spaced apart along the axial direction of the stator 20; the second spray ring extends axially along the stator 20 so that the third sub-cooling chamber 521 and the fourth sub-cooling chamber 522 are spaced apart along the radial direction of the stator 20.

[0126] For example, the first spray ring extends axially along the stator 20 so that the first sub-cooling chamber 511 and the second sub-cooling chamber 512 are distributed radially spaced along the stator 20; the second spray ring extends radially along the stator 20 so that the third sub-cooling chamber 521 and the fourth sub-cooling chamber 522 are distributed axially spaced along the stator 20.

[0127] For example, the first spray ring extends along the axial direction of the stator 20 so that the first sub-cooling chamber 511 and the second sub-cooling chamber 512 are distributed radially spaced along the stator 20; the second spray ring extends along the axial direction of the stator 20 so that the third sub-cooling chamber 521 and the fourth sub-cooling chamber 522 are distributed radially spaced along the stator 20.

[0128] Of course, the above are merely individual examples of specific installation methods for the first and second spray rings, and are not intended to limit this application. In practical applications, technicians can also design specific installation methods for the first and second spray rings as needed.

[0129] In this embodiment, the first cooling chamber 51 can be divided into a first sub-cooling chamber 511 and a second sub-cooling chamber 512 by a first spray ring. The first end winding 221 is located in the second cooling chamber 512. The cooling medium in the first sub-cooling chamber 511 can be sprayed into the second sub-cooling chamber 512 through the first spray ring to cool the first end winding 221 located in the second sub-cooling chamber 512, thereby improving the cooling efficiency of the first end winding 221.

[0130] The second cooling chamber 52 can be divided into a third sub-cooling chamber 521 and a fourth sub-cooling chamber 522 by the second spray ring. The second end winding 222 is located in the fourth cooling chamber 522. The cooling medium in the third sub-cooling chamber 521 can be sprayed into the fourth sub-cooling chamber 522 through the second spray ring to cool the second end winding 222 located in the fourth sub-cooling chamber 522, thereby improving the cooling efficiency of the second end winding 222.

[0131] Optionally, the stator cooling structure disclosed in this application embodiment further includes a second sealing ring, which is disposed between the cooling assembly 40 and the housing 10 to ensure a sealed connection between the cooling assembly 40 and the housing 10. The second sealing ring further improves the sealing performance between the cooling assembly 40 and the housing 10, resulting in better sealing between them.

[0132] Optionally, the stator cooling structure in this embodiment further includes a sealing element 30, which together with the housing 10 and the stator 20 forms a first cooling chamber 51 and a second cooling chamber 52.

[0133] In this embodiment, a first cooling chamber 51 and a second cooling chamber 52 are formed by enclosing a sealing member 30, a housing 10, and a stator 20, so that the first cooling chamber 51 and the second cooling chamber 52 are sealed chambers, thus avoiding leakage problems in the first cooling chamber 51 and the second cooling chamber 52.

[0134] Optionally, the stator 20 in this embodiment includes a stator core 21 and a stator winding 22 wound around the stator core 21. The stator winding 22 at least partially protrudes radially outward from the stator core 21 to form a first end winding 221, and at least partially protrudes radially inward from the stator core 21 to form a second end winding 222. A first cooling chamber 51 is used to accommodate the first end winding 221 so that the cooling medium entering the first cooling chamber 51 contacts and exchanges heat with the first end winding 221. A second cooling chamber 52 is used to accommodate the second end winding 222 so that the cooling medium entering the second cooling chamber 52 contacts and exchanges heat with the second end winding 222.

[0135] The stator 20 in this embodiment includes a stator core 21 and a stator winding 22. The stator core 21 has a ring-shaped structure, and the stator winding 22 is wound on the stator core 21. Along the radial direction of the stator core 21, the stator winding 22 at least partially protrudes from the outer side of the stator core 21 to form a first end winding 221. Along the radial direction of the stator core 21, the stator winding 22 at least partially protrudes from the inner side of the stator core 21 to form a second end winding 222.

[0136] The first end winding 221 is located within the second sub-cooling chamber 512 of the first cooling chamber 51. The cooling medium entering the first sub-cooling chamber 511 can be sprayed into the second sub-cooling chamber 512 through the first spray ring to cool the first end winding 221. This improves the cooling efficiency of the first end winding 221, making its cooling efficiency more optimal.

[0137] The second end winding 222 is located in the fourth sub-cooling chamber 522 of the second cooling chamber 52. The cooling medium entering the third sub-cooling chamber 521 of the second cooling chamber 52 can be sprayed into the fourth sub-cooling chamber 522 through the second spray ring to cool the second end winding 222. This improves the cooling efficiency of the second end winding 222, making its cooling efficiency more optimal.

[0138] Optionally, the sealing element 30 in this embodiment includes a first sealing ring 31 and a second sealing ring 32. The first sealing ring 31 and the second sealing ring 32 are arranged radially apart along the stator 20 and are located outside the second sealing ring 32. The first sealing ring 31, together with the housing 10 and the stator 20, forms a first cooling chamber 51. The second sealing ring 32, together with the housing 10 and the stator 20, forms a second cooling chamber 52.

[0139] The sealing element 30 in this embodiment includes a first sealing ring 31 and a second sealing ring 32. The first sealing ring 31 and the second sealing ring 32 are arranged radially apart along the stator 20, and the first sealing ring 31 is located outside the second sealing ring 32. The first sealing ring 31, the housing 10, and the stator 20 together form a first cooling chamber 51. The first sealing ring 31 seals the first cooling chamber 51, resulting in a better sealing effect and preventing leakage.

[0140] The second sealing ring 32, the housing 10 and the stator 20 enclose and form the second cooling chamber 51. The second sealing ring 32 seals the second cooling chamber 52, making the sealing effect of the second cooling chamber 52 better and avoiding leakage problems in the second cooling chamber 52.

[0141] Optionally, the sealing element 30 in this embodiment further includes a sealing part 33, which is disposed between the first sealing ring 31 and the second sealing ring 32 and connected to the first sealing ring 31 and the second sealing ring 32 respectively.

[0142] The sealing element 30 disclosed in this application embodiment further includes a sealing part 33, which is connected between the first sealing ring 31 and the second sealing ring 32, so as to connect the sealing element 30 to the stator 20 through the sealing part 33 and seal the stator 20.

[0143] In this embodiment, the specific connection method between the sealing part 33 and the first sealing ring 31 and the second sealing ring 32 is not limited. In practical applications, those skilled in the art can configure it as needed. Exemplarily, the sealing part 33 is connected between the first sealing ring 31 and the second sealing ring 32, and is integrally formed with the first sealing ring 31 and the second sealing ring 32. The sealing part 33 is welded between the first sealing ring 31 and the second sealing ring 32.

[0144] Optionally, in this embodiment of the application, the stator core 21 near the sealing part 33 is provided with a mounting groove 212 extending radially along the stator core 21, the mounting groove 212 is used to install the stator winding 22; the sealing part 33 is a sealing strip, the sealing strip is adapted to be sealed and connected with the mounting groove 212.

[0145] In this embodiment, a mounting groove 212 extending radially along the stator core 21 is provided on the side of the stator core 21 near the sealing part 33. The wires of the stator winding 22 are installed in the mounting groove 212 to fix the wires of the stator winding 22 through the mounting groove 212.

[0146] Because gaps exist between the multiple wires in the mounting groove 212, or between the wires and the edge of the mounting groove 212, the cooling medium in the first cooling chamber 51 and the second cooling chamber 52 may flow through these gaps into the gap between the stator 20 and the rotor 70. Therefore, in this embodiment, a sealing strip is placed inside the mounting groove 212 to seal it, preventing the cooling medium from flowing into the gap between the stator 20 and the rotor 70, thereby improving the motor's performance.

[0147] It should be noted that in this embodiment, the specific number of mounting slots 212 and sealing strips is not limited. In practical applications, technicians can set them as needed. It is understood that the number of mounting slots 212 and sealing strips should be consistent. By sealing one sealing strip with one mounting slot 212, the entire end face of the stator core 21 can be sealed, effectively preventing leakage of cooling medium.

[0148] Optionally, in the embodiments of this application, the first sealing ring 31, the second sealing ring 32, and the sealing strip together form an integrally molded structure.

[0149] In this embodiment, the first sealing ring 31, the second sealing ring 32, and multiple sealing strips form an integrally molded structure. On one hand, this improves the overall structural strength of the sealing element 30, thus extending its service life. On the other hand, since there are no joint gaps between the first sealing ring 31 and the sealing strips, and between the second sealing ring 32 and the sealing strips, the sealing performance of the entire sealing element 30 is improved. Furthermore, since no additional assembly steps are required between the first sealing ring 31, the second sealing ring 32, and the multiple sealing strips, the motor assembly process is simplified, the assembly requirements are reduced, and the assembly efficiency of the motor is improved.

[0150] Optionally, the stator cooling structure disclosed in this application embodiment further includes a first sealing ring, which is disposed between the sealing member 30 and the housing 10 to make the sealing member 30 and the housing 10 sealed together.

[0151] In this embodiment, a first sealing ring is provided between the seal 30 and the housing 10. The provision of the first sealing ring helps to further improve the sealing effect between the seal 30 and the housing 10.

[0152] Optionally, the housing 10 in this embodiment includes an end plate 13, a first side plate 14, and a second side plate 15. The end plate 13 is disposed at one end of the stator 20 away from the seal 30. The first side plate 14 and the second side plate 15 extend circumferentially along the end plate 13 and are spaced apart radially from the stator 20. The first side plate 14 is located outside the second side plate 15. The end plate 13, the first side plate 14, the seal 30, and the stator 20 together form a first cooling chamber 51, and the end plate 13, the second side plate 15, the seal 30, and the stator 20 together form a second cooling chamber 52.

[0153] The housing 10 in this embodiment includes an end plate 13, a first side plate 14, and a second side plate 15. The end plate 13 is disposed on the side of the stator 20 away from the seal 30. The first side plate 14 and the second side plate 15 extend circumferentially along the end plate 13, are radially spaced apart from each other on the stator 20, and the first side plate 14 is located outside the second side plate 15. The housing 10 is formed by the end plate 13, the first side plate 14, and the second side plate 15.

[0154] The above configuration allows the end plate 13, the first side plate 14, the seal 30, and the stator 20 to enclose and form the first cooling chamber 51, and the end plate 13, the second side plate 15, the seal 30, and the stator 20 to enclose and form the second cooling chamber 52.

[0155] It should be noted that the housing 10 in this embodiment includes two housings, which are arranged opposite each other along the axial direction of the stator 20 to form a closed housing.

[0156] It should be noted that, as shown in Figure 12, the second side plate 15 in this embodiment can be integrally formed with the seal 30, and as shown in Figure 3, the second side plate 15 in this embodiment can also be integrally formed with the housing 10. These designs simplify the motor assembly process, reduce assembly requirements, and improve assembly efficiency.

[0157] Optionally, in this embodiment of the application, the first cooling medium channel includes a cooling medium inlet channel and a cooling medium outlet channel. The cooling medium inlet channel is connected to the first sub-cooling chamber 511 and the third sub-cooling chamber 521 respectively through the second cooling medium channel, and the cooling medium outlet channel is connected to the second sub-cooling chamber 512 and the fourth sub-cooling chamber 522 respectively.

[0158] In this embodiment, the cooling medium inlet channel is connected to the first sub-cooling chamber 511 and the third sub-cooling chamber 521 via the second cooling medium channel, allowing the cooling medium to enter the first sub-cooling chamber 511 and the third sub-cooling chamber 521 through the cooling medium inlet channel. The cooling medium outlet channel is connected to the second sub-cooling chamber 512 and the fourth sub-cooling chamber 522, allowing the cooling medium in the second sub-cooling chamber 512 and the fourth sub-cooling chamber 522 to flow out through the cooling medium outlet channel.

[0159] Optionally, in this embodiment of the application, the cooling medium inlet channel is disposed on the end plate 13 and / or the first side plate 14; and / or, the cooling medium outlet channel is disposed on the end plate 13 and / or the first side plate 14.

[0160] In this embodiment, the cooling medium inlet channel is directly integrated onto the end plate 13 and / or the first side plate 14, and / or the cooling medium outlet channel is directly integrated onto the end plate 13 and / or the first side plate 14. This avoids inconvenience in pipe connection and also allows the cooling medium inlet channel and cooling medium outlet channel to be as close as possible to the cooling chamber 50 to improve the cooling effect.

[0161] It should be noted that, in this embodiment, the cooling medium inlet channel and the cooling medium outlet channel may be provided only on the end plate 13, or only on the first side plate 14, or both on the end plate 13 and the first side plate 14. This embodiment does not impose excessive restrictions on these aspects; in practical applications, those skilled in the art can configure them as needed.

[0162] Optionally, in this embodiment of the application, the cooling medium inlet channel 11 is disposed on the end plate 13. The cooling medium inlet channel 11 includes an inlet and a first outlet. The inlet is used to communicate with an external cooling device; the first outlet is communicated with a second cooling medium channel.

[0163] In this embodiment, the liquid inlet is connected to an external circulating cooling device to achieve circulation of the cooling medium, thereby continuously cooling the stator 20, improving the cooling efficiency of the stator 20, and ensuring the reliability of the motor. The first liquid outlet is connected to the second cooling medium channel so that the cooling medium entering the channel 11 can enter the second cooling medium channel.

[0164] Optionally, in this embodiment, the cooling medium outflow channel is disposed on the end plate 13. The cooling medium outflow channel includes a second liquid outlet, a third connecting port and a fourth connecting port. The second liquid outlet is used to communicate with an external cooling device. The third connecting port and the fourth connecting port are arranged radially at intervals along the stator 20. The third connecting port communicates with the second sub-cooling chamber 512 and the fourth connecting port communicates with the fourth sub-cooling chamber 522.

[0165] In this embodiment, the second liquid outlet is connected to an external circulating cooling device to achieve cooling medium circulation, which facilitates continuous cooling of the stator 20, improves the cooling efficiency of the stator 20, and thus helps to improve the reliability of the motor operation.

[0166] Furthermore, since the third connecting port is connected to the second sub-cooling chamber 512 and the fourth connecting port is connected to the fourth sub-cooling chamber 522, the cooling medium in the second sub-cooling chamber 512 can flow out through the third connecting port, and the cooling medium in the fourth sub-cooling chamber 522 can flow out through the fourth connecting port.

[0167] Optionally, the cooling medium inlet channel 11 is a liquid inlet, and / or the cooling medium outlet channel 12 is a liquid outlet.

[0168] In this embodiment, the cooling medium inlet channel 11 can be configured as a liquid inlet, and / or the cooling medium outlet channel 12 can be configured as a liquid outlet. This further simplifies the structure of the cooling medium inlet channel 11 and the cooling medium outlet channel 12, and reduces the processing difficulty of the housing 10.

[0169] For example, two liquid inlets can be provided: one liquid inlet is opened on the first side plate 14 to communicate with the first sub-cooling chamber 511, and the other liquid inlet is opened on the end plate 13 to communicate with the third sub-cooling chamber 521. Two liquid outlets can also be provided: one liquid outlet is opened on the end plate 13 and communicates with the second sub-cooling chamber 512, and the other liquid outlet is opened on the end plate 11 and communicates with the fourth sub-cooling chamber 522.

[0170] This application discloses a stator cooling structure, which includes a housing and at least a portion of the stator enclosing a cooling chamber. The housing is provided with a first cooling medium channel, and the stator is provided with a second cooling medium channel. The first cooling medium channel communicates with the cooling chamber through the second cooling medium channel.

[0171] The stator cooling structure disclosed in this application embodiment forms a cooling chamber by at least partially enclosing the shell and the stator. The shell is provided with a first cooling medium channel, and the stator is provided with a second cooling medium channel. The first cooling medium channel communicates with the cooling chamber through the second cooling medium channel. The cooling medium can cool the stator core of the stator from the first cooling medium channel and the second cooling medium channel. The cooling medium then enters the cooling chamber from the second cooling medium channel to cool the stator windings of the stator, thereby improving the cooling efficiency of the stator.

[0172] This application also discloses a stator, which includes the stator cooling structure described in the above embodiments.

[0173] It should be noted that the stator cooling structure included in the embodiments of this application is the same as the stator cooling structure described in the above embodiments, and its beneficial effects are also similar, so it will not be repeated here.

[0174] Optionally, the stator 20 disclosed in this application embodiment includes a stator core 21; a stator winding 22, which is wound around the stator core 21. Along the radial direction of the stator core 21, the stator winding 22 at least partially protrudes from the radially outer side of the stator core 21 to form a first end winding 221, and the stator winding 22 at least partially protrudes from the radially inner side of the stator core 21 to form a second end winding 222; and a cooling chamber 50 for cooling the first end winding 221 and / or the second end winding 222.

[0175] As shown in Figures 4 and 5, the stator 20 in this embodiment includes a stator core 21 and a stator winding 22. The stator winding 22 is wound around the stator core 21. Along the radial direction of the stator 20, the stator winding 22 at least partially protrudes radially outward from the stator core 21 to form a first end winding 221. It can be understood that the first end winding 221 is wound on the outer side of the stator core 21. Along the radial direction of the stator 20, the stator winding 22 at least partially protrudes radially inward from the stator core 21 to form a second end winding 222. It can be understood that the second end winding 222 is wound on the inner side of the stator core 21. This allows the first end winding 221 to be located within the first cooling chamber 51, allowing the cooling medium to contact the first end winding 221 and exchange heat with it, thereby reducing the temperature of the first end winding 221 and improving the cooling efficiency of the stator 20. The second end winding 222 can be located in the second cooling chamber 52, and the cooling medium can contact the second end winding 222 to exchange heat with the second end winding 222, thereby reducing the temperature of the second end winding 222 and improving the cooling efficiency of the stator 20.

[0176] Optionally, in this embodiment, the housing 10 includes a first side plate 14 surrounding the stator core 21, and a mounting cavity 16 is provided on the side of the first side plate 14 away from the stator core 21; the stator 20 also includes a junction box, which is disposed in the mounting cavity 16 and is used to electrically connect with the stator winding 22.

[0177] In this embodiment, a mounting cavity 16 is provided on the side of the first side plate 14 opposite to the stator core 21, and the junction box is disposed in the mounting cavity 16 to facilitate electrical connection between the junction box and the stator winding 22. Furthermore, the above arrangement can also reduce the axial dimension of the stator 20, which is beneficial to the miniaturization of the motor.

[0178] This application also discloses an electric motor, which includes a rotating shaft 60, a rotor 70, and a stator 20 as described in the above embodiments; the rotor 70 and the stator 20 are spaced apart axially on the rotating shaft 60; the rotating shaft 60 passes through the rotor 70 and the stator 20, and is fixedly connected to the rotor 70 and rotatably connected to the stator 20 so that the rotating shaft 60 can rotate relative to the stator 20.

[0179] The motor disclosed in this application includes a rotor 70, a shaft 60, and a stator 20 as described in the above embodiments. The rotor 70 is disposed within the housing 10, and the rotor 70 and stator 20 are spaced apart axially along the shaft 60. The shaft 60 passes through the stator 20 and rotor 70 along the axial direction of the stator 20, and is fixedly connected to the rotor 70 and rotatably connected to the stator 20, allowing the rotor 70 to rotate relative to the stator 20. Thus, during motor operation, the electromagnetic interaction between the stator 20 and rotor 70 drives the rotor 70 to rotate and output power. By spaced the rotor 70 and stator 20, i.e., by having a certain gap between them, the electromagnetic interaction area can be precisely controlled, reducing leakage flux and reluctance losses, which is beneficial for improving the motor's energy conversion efficiency and output power.

[0180] Optionally, in this embodiment of the application, there are two stators 20, which are disposed on opposite sides of the rotor 70 along their axial direction.

[0181] It should be noted that the accompanying drawings in this application embodiment only show the case where the motor includes two stators 20 and a single rotor 70. In practical applications, the motor in this application embodiment may also include a single stator 20 and a single rotor 70. Alternatively, the motor may also include N stators 20 and (N-1) rotors 70, where N > 2. In this application embodiment, no excessive restrictions are imposed, and in practical applications, those skilled in the art can set it as needed.

[0182] This application also discloses a powertrain, which includes the motor described in any of the above embodiments. The powertrain can be a pure electric powertrain, a hybrid powertrain, or other types, and can be equipped with any drive architecture, such as centralized drive, four-wheel drive, two-wheel drive, wheel-side drive, etc.

[0183] It should be noted that in this embodiment, the structure of the motor is the same as that of the motor in any of the above embodiments, and its beneficial effects are similar, so it will not be described again here.

[0184] This application also provides a vehicle that includes the powertrain described in any of the foregoing embodiments, or the electric motor described in any of the foregoing embodiments.

[0185] It should be noted that in this embodiment, the structure of the powertrain is the same as that of the powertrain described in any of the above embodiments, and the structure of the motor is the same as that of the motor described in any of the above embodiments. Of course, the beneficial effects are similar, and will not be elaborated upon here.

[0186] It should be noted that the vehicle in this embodiment can be a gasoline-powered vehicle, a hybrid vehicle, or a pure electric vehicle. This embodiment does not impose excessive restrictions on the specific type of vehicle. In practical applications, technicians can configure the vehicle as needed.

[0187] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0188] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0189] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0190] The technical solution provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A stator cooling structure, characterized in that, The stator cooling structure includes a housing for accommodating the stator. The housing and the stator enclose a cooling chamber. The housing is provided with a first cooling medium channel, and the stator is provided with a second cooling medium channel. The first cooling medium channel communicates with the cooling chamber through the second cooling medium channel.

2. The stator cooling structure according to claim 1, characterized in that, The second cooling medium channel is disposed in the stator core of the stator, and the cooling medium in the second cooling medium channel is used to cool one side of the stator core.

3. The stator cooling structure according to claim 2, characterized in that, The second cooling medium channel includes a first sub-cooling medium channel, which extends radially along the stator and communicates with the first cooling medium channel and the cooling chamber.

4. The stator cooling structure according to claim 3, characterized in that, The first sub-cooling medium channel includes multiple channels, which are arranged at intervals along the circumference of the stator.

5. The stator cooling structure according to claim 4, characterized in that, The second cooling medium channel further includes a second sub-cooling medium channel, which extends circumferentially along the stator and is connected to the first sub-cooling medium channel and the first cooling medium channel, so that the cooling medium in the first cooling medium channel can enter the first sub-cooling medium channel through the second sub-cooling medium channel.

6. The stator cooling structure according to claim 5, characterized in that, The second sub-cooling medium channel includes multiple channels, which are arranged at radial intervals along the stator.

7. The stator cooling structure according to claim 5, characterized in that, Both the first sub-cooling medium channel and the second sub-cooling medium channel are located in the stator core of the stator.

8. The stator cooling structure according to any one of claims 2-7, characterized in that, The cooling chamber includes a first cooling chamber and a second cooling chamber, both of which are connected to the first sub-cooling medium channel. Along the radial direction of the stator, the first cooling chamber and the second cooling chamber are spaced apart, with the first cooling chamber located outside the second cooling chamber. The first cooling chamber is used to cool the radially outer side of the stator, and the second cooling chamber is used to cool the radially inner side of the stator.

9. The stator cooling structure according to claim 8, characterized in that, Also includes: A cooling assembly is disposed in the first cooling chamber and / or the second cooling chamber, and the cooling assembly can connect the first cooling medium channel and the second cooling medium channel.

10. The stator cooling structure according to claim 9, characterized in that, The cooling assembly includes a first cooling element and a second cooling element, which are spaced apart along the radial direction of the stator. The first cooling element is disposed within the first cooling chamber to divide the first cooling chamber into a first sub-cooling chamber and a second sub-cooling chamber, through which a cooling medium can enter the second sub-cooling chamber from the first sub-cooling chamber. The second cooling element is disposed within the second cooling chamber to divide the second cooling chamber into a third sub-cooling chamber and a fourth sub-cooling chamber, through which a cooling medium can enter the fourth sub-cooling chamber from the third sub-cooling chamber. Both the first sub-cooling chamber and the third sub-cooling chamber are connected to the first sub-cooling medium channel.

11. The stator cooling structure according to claim 10, characterized in that, The stator winding of the stator at least partially protrudes radially outward from the stator core to form a first end winding, and the stator winding at least partially protrudes radially inward from the stator core to form a second end winding; the second sub-cooling chamber is used to accommodate the first end winding so that the cooling medium contacts the first end winding for heat exchange, and the third sub-cooling chamber is used to accommodate the second end winding so that the cooling medium contacts the second end winding for heat exchange.

12. The stator cooling structure according to claim 10, characterized in that, The pressure of the cooling medium in the first sub-cooling chamber is greater than the pressure of the cooling medium in the second sub-cooling chamber; the pressure of the cooling medium in the third sub-cooling chamber is greater than the pressure of the cooling medium in the fourth sub-cooling chamber.

13. The stator cooling structure according to any one of claims 10-12, characterized in that, The first cooling component includes a first spray ring, on which a first spray hole is provided. The first spray hole is used to spray the cooling medium of the first sub-cooling chamber into the second sub-cooling chamber.

14. The stator cooling structure according to claim 13, characterized in that, The first spray hole includes a plurality of holes, which are spaced apart along the circumferential, axial and / or radial directions of the first spray ring.

15. The stator cooling structure according to claim 13, characterized in that, The second cooling component includes a second spray ring, which is provided with a second spray hole for spraying the cooling medium of the third sub-cooling chamber into the fourth sub-cooling chamber.

16. The stator cooling structure according to claim 15, characterized in that, The second spray hole includes a plurality of holes, which are spaced apart along the circumferential, axial and / or radial directions of the second spray ring.

17. The stator cooling structure according to claim 15 or 16, characterized in that, The first spray ring extends radially along the stator so that the first sub-cooling chamber and the second sub-cooling chamber are spaced apart along the axial direction of the stator; the second spray ring extends radially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are spaced apart along the axial direction of the stator.

18. The stator cooling structure according to claim 15 or 16, characterized in that, The first spray ring extends radially along the stator so that the first sub-cooling chamber and the second sub-cooling chamber are spaced apart along the axial direction of the stator; the second spray ring extends axially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are spaced apart along the radial direction of the stator.

19. The stator cooling structure according to claim 15 or 16, characterized in that, The first liquid spray ring extends along the axial direction of the stator so that the first sub-cooling chamber and the second sub-cooling chamber are distributed radially spaced along the stator; the second liquid spray ring extends radially along the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are distributed axially spaced along the stator.

20. The stator cooling structure according to claim 15 or 16, characterized in that, The first liquid spray ring extends along the axial direction of the stator so that the first sub-cooling chamber and the second sub-cooling chamber are distributed radially spaced along the stator; the second liquid spray ring extends along the axial direction of the stator so that the third sub-cooling chamber and the fourth sub-cooling chamber are distributed radially spaced along the stator.

21. The stator cooling structure according to claim 9, characterized in that, The stator cooling structure further includes a second sealing ring, which is disposed between the cooling component and the housing to ensure a sealed connection between the cooling component and the housing.

22. The stator cooling structure according to claim 9, characterized in that, Also includes: A sealing element, which, together with the housing and the stator, forms the first cooling chamber and the second cooling chamber.

23. The stator cooling structure according to claim 22, characterized in that, The sealing element includes a first sealing ring and a second sealing ring, the first sealing ring and the second sealing ring being arranged radially apart along the stator and located outside the second sealing ring; the first sealing ring, together with the housing and the stator, forms the first cooling chamber; the second sealing ring, together with the housing and the stator, forms the second cooling chamber.

24. The stator cooling structure according to claim 23, characterized in that, The sealing element further includes a sealing portion, which is disposed between the first sealing ring and the second sealing ring and is connected to the first sealing ring and the second sealing ring respectively.

25. The stator cooling structure according to claim 24, characterized in that, The stator core has a mounting groove extending radially along the side near the sealing part, which is used to mount the stator winding; the sealing part is a sealing strip, which is adapted to be sealed to the mounting groove.

26. The stator cooling structure according to claim 25, characterized in that, The mounting slots are provided in multiple ways, and the multiple mounting slots are spaced apart along the circumference of the stator core; the sealing strips are provided in multiple ways, and the multiple sealing strips are spaced apart along the circumference of the sealing element, with one sealing strip embedded in one mounting slot.

27. The stator cooling structure according to claim 25 or 26, characterized in that, The first sealing ring, the second sealing ring, and the sealing strip together form an integral molded structure.

28. The stator cooling structure according to claim 22, characterized in that, The sealing element and the cooling assembly together form an integral molded structure.

29. The stator cooling structure according to claim 22, characterized in that, The stator cooling structure further includes a first sealing ring, which is disposed between the sealing element and the housing to make the sealing element and the housing sealed together.

30. The stator cooling structure according to claim 22, characterized in that, The housing includes an end plate, a first side plate, and a second side plate; the end plate is disposed at the end of the stator away from the seal, the first side plate and the second side plate extend circumferentially along the end plate and are spaced apart radially from the stator, and the first side plate is located outside the second side plate; wherein, the end plate, the first side plate, the seal, and the stator enclose to form the first cooling chamber, and the end plate, the second side plate, the seal, and the stator enclose to form the second cooling chamber.

31. The stator cooling structure according to claim 30, characterized in that, The first cooling medium channel includes a cooling medium inlet channel and a cooling medium outlet channel. The cooling medium inlet channel is connected to the first sub-cooling chamber and the third sub-cooling chamber respectively through the second cooling medium channel. The cooling medium outlet channel is connected to the second sub-cooling chamber and the fourth sub-cooling chamber respectively.

32. The stator cooling structure according to claim 31, characterized in that, The cooling medium inlet channel is disposed on the end plate and / or the first side plate; and / or, the cooling medium outlet channel is disposed on the end plate and / or the first side plate.

33. The stator cooling structure according to claim 32, characterized in that, The cooling medium inlet channel is disposed on the end plate, and the cooling medium inlet channel includes an inlet and a first outlet; the inlet is used to communicate with an external cooling device; the first outlet is communicated with the second cooling medium channel.

34. The stator cooling structure according to any one of claims 31-33, characterized in that, The cooling medium outflow channel is disposed on the end plate. The cooling medium outflow channel includes a second liquid outlet, a third connecting port and a fourth connecting port. The second liquid outlet is used to communicate with an external cooling device. The third connecting port and the fourth connecting port are arranged radially spaced along the stator. The third connecting port communicates with the second sub-cooling chamber and the fourth connecting port communicates with the fourth sub-cooling chamber.

35. The stator cooling structure according to claim 31, characterized in that, The cooling medium inlet channel is a liquid inlet, and / or the cooling medium outlet channel is a liquid outlet.

36. A stator, characterized in that, The stator includes the stator cooling structure according to any one of claims 1-35.

37. The stator according to claim 36, characterized in that, include: Stator core; stator winding, the stator winding being wound around the stator core, the stator winding at least partially protruding radially outward of the stator core to form a first end winding, the stator winding at least partially protruding radially inward of the stator core to form a second end winding; the cooling chamber being used to cool the first end winding and / or the second end winding.

38. The stator according to claim 37, characterized in that, The housing includes a first side plate surrounding the stator core, and a mounting cavity is provided on the side of the first side plate opposite to the stator core; the stator also includes a junction box disposed in the mounting cavity, and the junction box is used for electrical connection with the stator winding.

39. An electric motor, characterized in that, The motor includes a rotating shaft, a rotor, and a stator as described in any one of claims 36-38; the rotor and the stator are spaced apart axially on the rotating shaft; the rotating shaft passes through the rotor and the stator, and is fixedly connected to the rotor and rotatably connected to the stator so that the rotating shaft can rotate relative to the stator.

40. The motor according to claim 39, characterized in that, The stator is provided in two parts, which are located on opposite sides of the rotor along the axial direction.

41. A powertrain, characterized in that, Includes the motor described in claim 39 or 40.

42. A vehicle, characterized in that, Includes the motor as described in claim 39 or 40, or the powertrain as described in claim 41.

Images