Motor and vehicle having same

Abstract

A motor and a vehicle having same. A plurality of stator laminations include a first lamination and a second lamination, and first flow channels extending in the radial direction are formed on the first lamination. Two sides of the first lamination in the thickness direction are provided with second laminations, and the second laminations are provided with second flow channels communicating the first flow channels with stator slots. The diameter of each second lamination is greater than the diameter of the first lamination, the portion of one side surface of each second lamination protruding from the outer periphery of the first lamination in the thickness direction is configured as a flow channel surface, a flow channel groove is defined between the outer peripheral wall of the first lamination and the flow channel surfaces of two adjacent second laminations, and the inlet of each first flow channel is arranged in the corresponding flow channel groove. The first lamination and the second laminations are configured as one group or a plurality of groups sequentially arranged in the thickness direction.

Description

Electric motors and vehicles equipped with them

[0001] This application claims priority to Chinese patent application No. 202410972500.5, filed on July 19, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electric motor technology, and more particularly to an electric motor and a vehicle having the same. Background Technology

[0003] In the related technology, the motor is directly connected to the stator slot through an oil inlet channel formed on the stator lamination and the coolant is introduced into the stator slot to achieve immersion cooling of the windings in the stator slot. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the related art.

[0005] Therefore, on the one hand, this disclosure proposes an electric motor and a vehicle having the same.

[0006] According to some embodiments of the present disclosure, by constructing the first lamination and the second lamination as multiple sets arranged sequentially in the thickness direction, the path of coolant entering the stator slot is increased, the flow rate of coolant in the stator slot is increased, and the heat dissipation effect of the motor is improved.

[0007] On the other hand, this disclosure also proposes a vehicle having the aforementioned motor.

[0008] In some embodiments of this disclosure, the motor includes a motor stator comprising a plurality of stator laminations stacked in the thickness direction. Each of the plurality of stator laminations has a stator slot. The plurality of stator laminations includes a first lamination and a second lamination. The first lamination has a first flow channel extending radially. The second laminations are respectively disposed on both sides of the first lamination in the thickness direction, and the second laminations have a second flow channel communicating with the first flow channel and the stator slot. The diameter of the second lamination is larger than the diameter of the first lamination. A portion of one surface of the second lamination protruding from the outer periphery of the first lamination in the thickness direction is configured as a flow channel surface. An annular flow channel groove is defined between the outer peripheral wall of the first lamination and the flow channel surfaces of two adjacent second laminations. The inlet of the first flow channel is disposed within the flow channel groove. The first lamination and the second laminations are configured as a group or as multiple groups arranged sequentially in the thickness direction.

[0009] According to some embodiments of this disclosure, a motor has second laminations disposed on both sides of a first lamination in the thickness direction, with the diameter of the second laminations being larger than that of the first lamination. A portion of one surface of the second lamination protruding from the outer periphery of the first lamination in the thickness direction is configured as a flow channel surface. An annular flow channel groove is defined between the outer peripheral wall of the first lamination and the flow channel surfaces of two adjacent second laminations. A first flow channel communicating with the flow channel groove is formed on the first lamination, and a second flow channel communicating with the stator slot and the first flow channel are formed on the second lamination. In this way, coolant can flow into the first flow channel through the flow channel groove, and the coolant in the first flow channel flows into the stator slot through the second flow channel, achieving cooling of the windings in the stator slot. Furthermore, the first and second laminations can be configured as multiple sets arranged sequentially in the thickness direction according to the length of the motor. This allows coolant to enter the stator slot through the flow channel grooves, the first flow channel, and the second flow channel provided on multiple sets of first and second laminations, increasing the path for coolant to enter the stator slot, increasing the flow rate of coolant in the stator slot, and improving the motor's heat dissipation effect.

[0010] In some embodiments of this disclosure, a third flow channel extending axially is formed on the second lamination, the inlet of the third flow channel being disposed on the flow channel surface and communicating with the flow channel groove.

[0011] In some embodiments of this disclosure, the motor further includes: a third lamination, wherein the third lamination is provided at both ends of the motor stator, a fourth flow channel is formed on the third lamination, the fourth flow channel is connected to the third flow channel, and the fourth flow channel is inclined toward the center along the radial direction of the third lamination.

[0012] In some embodiments of this disclosure, the motor further includes: a third lamination, wherein the third lamination is provided at both ends of the motor stator, and a fourth flow channel is formed on the third lamination, wherein the fourth flow channel is staggered with the third flow channel and is located radially inside or radially outside the third flow channel.

[0013] In some embodiments of this disclosure, the motor further includes: a fourth lamination located between the third lamination and the second lamination, the fourth lamination having a fifth flow channel formed on it, which is directly opposite to the third flow channel, the fifth flow channel being staggered with the fourth flow channel and located radially inside or radially outside the fourth flow channel.

[0014] In some embodiments of this disclosure, the outer diameters of the second lamination, the third lamination, and the fourth lamination are equal. A first oil injection hole is formed on the second lamination, a second oil injection hole is formed on the fourth lamination, and a third oil injection hole is formed on the third lamination. The distance from the center of the first oil injection hole to the center of the second lamination is R1, the distance from the center of the second oil injection hole to the center of the fourth lamination is R2, and the distance from the center of the third oil injection hole to the center of the third lamination is R3, where R1 = R2 > R3.

[0015] In some embodiments of this disclosure, the third lamination has 2n third injection holes, the second lamination has n first injection holes, and the fourth lamination has n second injection holes. Two adjacent third injection holes are respectively positioned opposite to one of the n first injection holes and one of the n second injection holes.

[0016] In some embodiments of this disclosure, the motor further includes: a winding housed within the stator slots; and an insulating layer covering the outer surface of the winding, wherein oil channels are formed on the radially outer side of the insulating layer.

[0017] In some embodiments of this disclosure, the insulating layer is disposed around the outer periphery of the winding, and the first side edge and the second side edge of the insulating layer coincide radially and are spaced apart to form the oil guiding channel.

[0018] In some embodiments of this disclosure, the vehicle is equipped with the aforementioned motor. Since the vehicle according to some embodiments of this disclosure is equipped with the aforementioned motor, the heat dissipation performance of the vehicle during operation is better, thereby improving the stability and reliability of the vehicle during operation.

[0019] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 is a side view of a motor stator according to some embodiments;

[0022] Figure 2 is a diagram showing the fit between some insulation layers and windings;

[0023] Figure 3 is a structural diagram of a third lamination according to some embodiments;

[0024] Figure 4 is a structural diagram of a first lamination according to some embodiments;

[0025] Figure 5 is a structural diagram of the second lamination according to some embodiments;

[0026] Figure 6 is a structural diagram of the fourth lamination according to some embodiments;

[0027] Figure 7 is a structural diagram showing the engagement of the first lamination, the second lamination, the third lamination, and the fourth lamination according to some embodiments;

[0028] Figure 8 is a flow diagram of coolant when cooling the winding ends according to some embodiments;

[0029] Figure 9 is a flow diagram of coolant during cooling of the stator slot windings according to some embodiments;

[0030] Figure 10 is a block diagram of a vehicle according to some embodiments.

[0031] Reference numerals: 1000, vehicle; 200, motor; 100, motor stator; 11, first lamination; 111, first flow channel; 21, second lamination; 211, second flow channel; 212, third flow channel; 213, flow channel surface; 214, flow channel groove; 31, third lamination; 311, fourth flow channel; 41, fourth lamination; 411, fifth flow channel; 102, first oil injection hole; 103, second oil injection hole; 104, third oil injection hole; 13, insulation layer; 101, stator slot; 14, winding. Detailed Implementation

[0032] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0033] In related technologies, the motor directly connects to the stator slot through an oil inlet channel formed on the stator lamination and introduces coolant into the stator slot to achieve immersion cooling of the windings in the stator slot. When the motor size is large, since the coolant is guided to the stator slot through only one oil inlet channel, less coolant enters the stator slot, resulting in uneven cooling of the windings and poor cooling effect.

[0034] To address the aforementioned problems, some embodiments of this disclosure provide a motor 200.

[0035] The following description, with reference to the accompanying drawings, describes some embodiments of the motor 200 of this disclosure.

[0036] In some embodiments of this disclosure, a motor stator 100 is provided within the motor 200. Referring to Figures 1 and 2, the motor stator 100 includes a plurality of stator laminations stacked in the thickness direction. Each stator lamination has a stator slot 101 near its center, and a winding 14 is disposed within the stator slot 101. The plurality of stator laminations include a first lamination 11 and a second lamination 21, which are stacked in the axial direction of the motor 200, with the second lamination 21 disposed on both sides of the first lamination 11 in the thickness direction. Here, the axial direction of the motor 200 is aligned with the thickness direction of the stator laminations.

[0037] Referring to Figures 4 and 5, the first lamination 11 is provided with a first flow channel 111 extending radially, and the second lamination 21 is provided with a second flow channel 211 connecting the first flow channel 111 with the stator slot 101. It should be noted that the radial direction of the stator lamination and the thickness direction of the stator lamination can be perpendicular to each other.

[0038] Referring to Figures 1, 7, and 9, the diameter of the second lamination 21 is larger than the diameter of the first lamination 11. A portion of one surface of the second lamination 21 protruding from the outer periphery of the first lamination 11 in the thickness direction is configured as a flow channel surface 213. An annular flow channel groove 214 is defined between the outer peripheral wall of the first lamination 11 and the flow channel surfaces 213 of two adjacent second laminations 21. The inlet of the first flow channel 111 is located within the flow channel groove 214.

[0039] A liquid inlet is formed on the housing of the motor 200, which communicates with the flow channel 214. Coolant can enter the flow channel 214 through the liquid inlet. The coolant can be configured as oil. The coolant can flow into the first flow channel 111 through the flow channel 214, then into the second flow channel 211 through the first flow channel 111, and finally into the stator slot 101 through the second flow channel 211, thereby achieving cooling of the winding 14 in the stator slot 101.

[0040] In some embodiments, a first lamination 11 and two second laminations 21 can be configured as a group, and the first laminations 11 and second laminations 21 can be configured as multiple groups arranged sequentially in the thickness direction according to the length of the motor 200. In this way, the coolant can enter the stator slot 101 through the flow channel grooves 214, the first flow channel 111 and the second flow channel 211 provided on the multiple groups of first laminations 11 and second laminations 21, respectively, which increases the path of the coolant entering the stator slot 101, increases the flow rate of the coolant in the stator slot 101, and thus improves the heat dissipation effect of the motor 200.

[0041] In some embodiments of this disclosure, the motor 200 has second laminations 21 respectively provided on both sides of the first lamination 11 along the thickness direction, and the diameter of the second laminations 21 is larger than the diameter of the first lamination 11. The portion of one side surface of the second lamination 21 protruding from the outer periphery of the first lamination 11 in the thickness direction is constructed as a flow channel surface 213. An annular flow channel groove 214 is defined between the outer peripheral wall of the first lamination 11 and the flow channel surfaces 213 of the two adjacent second laminations 21. A first flow channel 111 communicating with the flow channel groove 214 is formed on the first lamination 11, and a second flow channel 211 communicating with the stator slot 101 and the first flow channel 111 is formed on the second lamination 21. In this way, coolant can flow into the first flow channel 111 through the flow channel groove 214, and coolant in the first flow channel 111 flows into the stator slot 101 through the second flow channel 211, thereby achieving cooling of the winding 14 in the stator slot 101.

[0042] Furthermore, the first lamination 11 and the second lamination 21 can be configured as multiple sets arranged sequentially in the thickness direction according to the length of the motor 200. In this way, the coolant can enter the stator slot 101 through the flow channel grooves 214, the first flow channel 111 and the second flow channel 211 provided on the multiple sets of the first lamination 11 and the second lamination 21, respectively. This increases the path of the coolant entering the stator slot 101, increases the flow rate of the coolant in the stator slot 101, and improves the heat dissipation effect of the motor 200.

[0043] In some embodiments of this disclosure, referring to Figures 5 and 8, a third flow channel 212 extending axially is formed on the second lamination 21, extending to both ends of the winding 14. The inlet of the third flow channel 212 is located on the flow channel surface 213 and communicates with the flow channel groove 214. Coolant in the flow channel groove 214 can enter the third flow channel 212 through the inlet of the third flow channel 212, so that the coolant can be sprayed onto the ends of the winding 14 through the third flow channel 212, thereby achieving cooling of the ends of the winding 14.

[0044] Furthermore, in some embodiments, multiple third flow channels 212 are constructed, and the multiple third flow channels 212 are spaced apart and arranged in parallel in the circumferential direction of the second lamination 21. In this way, the coolant can be sprayed onto the end of the winding 14 from multiple angles through the multiple third flow channels 212, so that the coolant can be more evenly distributed to the end of the winding 14, thereby improving the cooling effect on the end of the winding 14.

[0045] In some embodiments of this disclosure, referring to Figures 1 and 8, the motor 200 further includes a third lamination 31, which may be provided at both ends of the motor stator 100. A fourth flow channel 311 extending axially is formed on the third lamination 31, penetrating the third lamination 31 in the thickness direction and extending to the end of the winding 14. The fourth flow channel 311 may communicate with the third flow channel 212, thus not only expanding the flow path of the cooling medium but also ensuring that the coolant can flow smoothly from the flow channel groove 214 to the end of the winding 14.

[0046] Furthermore, the fourth flow channel 311 is inclined towards the center of the third lamination 31 along the radial direction of the third lamination 31. In this way, the coolant in the fourth flow channel 311 can be sprayed to the end of the winding 14 at different angles and directions, ensuring that the cooling medium can cover the surface of the winding 14 that needs to be cooled more evenly when it is sprayed, reducing cooling dead zones, thereby ensuring that all key heat source areas on the winding 14 located at the end of the motor stator 100 can be effectively cooled, and improving the cooling effect of the motor 200.

[0047] In some embodiments of this disclosure, the motor 200 further includes a third lamination 31, with the third lamination 31 provided at both ends of the motor stator 100. A fourth flow channel 311 extending axially is formed on the third lamination 31, penetrating the third lamination 31 in the thickness direction and extending to the end of the winding 14. The fourth flow channel 311 can communicate with the third flow channel 212, thus not only expanding the flow path of the cooling medium but also ensuring that the coolant can flow smoothly from the flow channel groove 214 to the end of the winding 14.

[0048] Furthermore, the fourth flow channel 311 is staggered with the third flow channel 212, and the fourth flow channel 311 is located radially inside or radially outside the third flow channel 212. This allows the fourth flow channel 311 and the third flow channel 212 to together form a stepped oil injection channel. Traditional straight oil injection channels may have the problem of coolant spraying beyond a predetermined area. The stepped oil injection channel allows for adjustment of the cooling intensity in different areas as needed. By changing the relative position and size of the injection nozzles (e.g., the first injection hole 102, the second injection hole 103, and the third injection hole 104 below), the flow direction and speed of the cooling medium can be precisely controlled. This ensures that the cooling medium can more evenly cover the surface of the winding 14 that needs cooling when sprayed, reducing cooling dead zones. This ensures that all critical heat source areas on the winding 14 at the end of the motor stator 100 are effectively cooled, improving the cooling effect of the motor 200.

[0049] In some embodiments of this disclosure, referring to Figures 1 and 8, the motor 200 further includes a fourth lamination 41 located between the third lamination 31 and the second lamination 21. A fifth flow channel 411 is formed on the fourth lamination 41, directly opposite the third flow channel 212, and the fifth flow channel 411 is staggered with the fourth flow channel 311. The fifth flow channel 411 extends the flow path of the cooling medium, ensuring that the coolant can flow smoothly from the flow channel groove 214 to the end of the winding 14. The fifth flow channel 411 is located radially inside or radially outside the fourth flow channel 311, such that the fourth flow channel 311, the third flow channel 212, and the fifth flow channel 411 together form a stepped oil injection channel. Conventional straight oil injection channels may have the problem of the coolant spray range exceeding a predetermined area; a stepped oil injection channel allows for adjustment of the cooling intensity in different areas as needed. By changing the relative position and size of the oil injection nozzles, the flow direction and speed of the cooling medium can be precisely controlled, ensuring that the cooling medium can more evenly cover the surface of the winding 14 that needs to be cooled when it is sprayed, reducing cooling dead zones, thereby ensuring that all key heat source areas on the winding 14 located at the end of the motor stator 100 can be effectively cooled, and improving the cooling effect of the motor 200.

[0050] In some embodiments of this disclosure, referring to Figures 1 and 9, the outer diameters of the second lamination 21, the third lamination 31, and the fourth lamination 41 are equal. A first oil injection hole 102 is formed on the second lamination 21 (refer to Figure 5), a second oil injection hole 103 is formed on the fourth lamination 41 (refer to Figure 6), and a third oil injection hole 104 is formed on the third lamination 31 (refer to Figure 3). The distance from the center of the first oil injection hole 102 to the center of the second lamination 21 is R1, the distance from the center of the second oil injection hole 103 to the center of the fourth lamination 41 is R2, and the distance from the center of the third oil injection hole 104 to the center of the third lamination 31 is R3, where R1 = R2 > R3.

[0051] That is, the first oil injection hole 102 and the second oil injection hole 103 are arranged opposite each other, and the third oil injection hole 104 is arranged radially staggered with the first oil injection hole 102 and the second oil injection hole 103. This arrangement forms a stepped fourth flow channel 311 that is inclined toward the center of the third lamination 31, which promotes the effective guidance of the coolant flow toward the end of the winding 14 during the heat dissipation process, so that more coolant can be accurately sprayed onto the end of the winding 14, thereby effectively reducing the temperature at the end of the winding 14 and improving the heat dissipation effect of the motor 200.

[0052] In some embodiments, the third flow channel 212, the fifth flow channel 411 and the fourth flow channel 311 together form a stepped oil injection channel, thereby effectively guiding the coolant to flow toward the end of the winding 14 during the heat dissipation process.

[0053] In some embodiments of this disclosure, the third lamination 31 has 2n third oil injection holes 104, the second lamination 21 has n first oil injection holes 102, and the fourth lamination 41 has n second oil injection holes 103. During the stacking process of the second lamination 21 and the fourth lamination 41, the n first oil injection holes 102 on the second lamination 21 are arranged axially in a one-to-one correspondence with the n second oil injection holes 103 formed on the fourth lamination 41. During the stacking process of the second lamination 21, the third lamination 31, and the fourth lamination 41, two adjacent third oil injection holes 104 are correspondingly arranged with one second oil injection hole 103 and one first oil injection hole 102.

[0054] That is, two adjacent third oil injection holes 104 are connected to a corresponding second oil injection hole 103 and a first oil injection hole 102. In this way, the coolant in a third flow channel 212 and a corresponding fifth flow channel 411 in the second lamination 21 can flow to the end winding 14 through the two fourth flow channels 311. Thus, the coolant can be sprayed onto the end winding 14 at multiple angles and directions, making the coolant coverage area wider, improving the heat dissipation effect of the motor 200, and ensuring the temperature consistency of the motor 200.

[0055] In some embodiments of this disclosure, referring to FIG2, the motor 200 further includes: a winding 14 and an insulating layer 13, the winding 14 being housed in a stator slot 101, the insulating layer 13 covering the outer surface of the winding 14, and an oil guiding channel being formed on the radially outer side of the insulating layer 13.

[0056] In some embodiments of this disclosure, the motor 200 also includes a winding 14 and an insulating layer 13. The insulating layer 13 is housed within the stator slot 101. The insulating layer 13 can be constructed as insulating paper, and the width of the insulating paper can be the same as the width of the stator slot 101. The insulating paper within the stator slot 101 provides necessary insulation protection for the motor 200, ensuring that insulation breakdown and discharge do not occur inside the motor 200, thereby preventing faults such as short circuits, leakage, and burnout, and ensuring the stable operation of the motor 200.

[0057] In some embodiments, insulating paper is wrapped around the outer periphery of the winding 14 with a certain gap between it and the winding 14. During the operation of the motor 200, the winding 14 may be subjected to mechanical vibration and friction from the outside or inside. The insulating paper wrapped around the winding 14 forms a protective layer, which not only reduces the mechanical damage to the winding 14, but also isolates the winding 14 from the external environment to prevent dust, oil and other impurities from adhering to the winding 14, ensuring the cleanliness of the winding 14 and reducing the risk of electrical faults caused by impurities.

[0058] In addition, the outer radial layer of the insulating paper forms an oil guiding channel. The coolant flowing into the stator slot 101 from the second flow channel 211 can flow into the gap between the insulating paper and the winding 14 through the oil guiding channel, so that the coolant can directly contact the winding 14 in the stator slot 101 and exchange heat. This achieves direct cooling of the winding 14 inside the stator slot 101, improves the heat dissipation effect of the motor 200, and enhances the stability and reliability of the motor 200 operation.

[0059] In some embodiments of this disclosure, an insulating layer 13 is disposed around the outer periphery of the winding 14, and the insulating layer 13 is provided with an opening. The width of the first side edge of the opening of the insulating layer 13 is set to 1 / 4 of the width of the insulating layer 13, and the width of the second side edge of the opening of the insulating layer 13 is set to 3 / 4 of the width of the insulating layer 13. The edges of the first side edge of the opening of the insulating layer 13 in the width direction and the edges of the second side edge of the opening of the insulating layer 13 in the width direction coincide in the radial direction of the stator lamination, and the first side edge and the second side edge of the insulating layer 13 are radially spaced to form an oil guiding channel for coolant flow. In this way, while ensuring that the insulation layer 13 can completely wrap around the winding 14 and provide insulation protection for the winding 14, more coolant can flow into the oil guide channel through the opening of the insulation layer 13. This prevents the coolant from flowing along the outer peripheral wall of the insulation layer 13 and into the space between the insulation layer 13 and the inner wall of the stator slot 101 due to being blocked by the insulation layer 13. As a result, more coolant can directly contact the winding 14 and exchange heat, improving the heat dissipation effect of the motor 200 and enhancing the stability and reliability of the motor 200 operation.

[0060] It should be noted that the width direction of the insulating layer 13 can refer to the direction perpendicular to the radial direction of the stator lamination.

[0061] The vehicle 1000 of some embodiments of this disclosure is briefly described below.

[0062] Referring to FIG10, in some embodiments of this disclosure, the vehicle 1000 is provided with the aforementioned motor 200. Since the vehicle 1000 in some embodiments of this disclosure is provided with the aforementioned motor 200, the heat dissipation performance of the vehicle 1000 in some embodiments of this disclosure is better, thereby improving the stability and reliability of the vehicle 1000 during operation.

[0063] In the description of this disclosure, it should be understood that the terms “center,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “inner,” “outer,” “axial,” “radial,” “circumferential,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0064] In the description of this disclosure, "first feature" and "second feature" may include one or more of the features.

[0065] In the description of this disclosure, "multiple" means two or more.

[0066] In the description of this disclosure, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0067] In the description of this disclosure, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0069] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric machine (200), comprising: an electric machine stator (100) comprising a plurality of stator laminations stacked in a thickness direction, each of the plurality of stator laminations being provided with a stator slot (101), the plurality of stator laminations comprising: a first lamination (11) formed with a first flow channel (111) extending in a radial direction; a second lamination (21) provided on both sides of the first lamination (11) in the thickness direction, the second lamination (21) being provided with a second flow channel (211) communicating the first flow channel (111) with the stator slot (101); wherein a diameter of the second lamination (21) is greater than a diameter of the first lamination (11), a portion of a side surface of the second lamination (21) in the thickness direction protruding outward of an outer periphery of the first lamination (11) is configured as a flow channel surface (213), an outer peripheral wall of the first lamination (11) and the flow channel surfaces (213) of two adjacent second laminations (21) define an annular flow channel groove (214), an inlet of the first flow channel (111) is provided in the flow channel groove (214); the first lamination (11) and the second lamination (21) are configured as a group, or a plurality of groups arranged in sequence in the thickness direction.

2. The electric machine (200) of claim 1, wherein, the second lamination (21) is formed with a third flow channel (212) extending in an axial direction, an inlet of the third flow channel (212) is provided in the flow channel surface (213) and communicates with the flow channel groove (214).

3. The electric machine (200) of claim 2, further comprising: a third lamination (31) is provided at both ends of the electric machine stator (100), the third lamination (31) is formed with a fourth flow channel (311), the fourth flow channel (311) communicates with the third flow channel (212), the fourth flow channel (311) is inclinedly provided toward a center of a circle along a radial direction of the third lamination (31).

4. The electric machine (200) of claim 2 or 3, further comprising: a third lamination (31) is provided at both ends of the electric machine stator (100), the third lamination (31) is formed with a fourth flow channel (311), the fourth flow channel (311) is provided alternately with the third flow channel (212) and located radially inward or radially outward of the third flow channel (212).

5. The electric machine (200) of claim 4, further comprising: a fourth lamination (41) is located between the third lamination (31) and the second lamination (21), the fourth lamination (41) is formed with a fifth flow channel (411) provided opposite to the third flow channel (212), the fifth flow channel (411) is provided alternately with the fourth flow channel (311) and located radially inward or radially outward of the fourth flow channel (311).

6. The electric machine (200) of claim 5, wherein, The outer diameter of the second punch (21), the outer diameter of the third punch (31) and the outer diameter of the fourth punch (41) are equal, a first oil injection hole (102) is formed on the second punch (21), a second oil injection hole (103) is formed on the fourth punch (41), and a third oil injection hole (104) is formed on the third punch (31), the distance from the center of the first oil injection hole (102) to the center of the second punch (21) is R1, the distance from the center of the second oil injection hole (103) to the center of the fourth punch (41) is R2, and the distance from the center of the third oil injection hole (104) to the center of the third punch (31) is R3, wherein R1=R2>R3.

7. The electric machine (200) of claim 6, wherein, The third punch (31) is formed with 2n third oil injection holes (104), the second punch (21) is provided with n first oil injection holes (102), and the fourth punch (41) is formed with n second oil injection holes (103); wherein The 2n third oil injection holes (104) are respectively opposite to one of the n first oil injection holes (102) and one of the n second oil injection holes (103).

8. The electric machine (200) according to any one of claims 1-7, further comprising: a winding (14) housed in the stator slot (101); and an insulation layer (13) covering an outer surface of the winding (14), a radial outer side of the insulation layer (13) being formed with an oil guide channel. The insulation layer (13) is circumferentially arranged on the winding (14), and a first side edge and a second side edge of the insulation layer (13) are radially coincident and spaced apart to form the oil guide channel.

9. The electric machine (200) of claim 8, wherein, 10. A vehicle (1000) comprising the electric machine (200) according to any one of claims 1-9. ​

Images