Motor and vehicle having same

Abstract

A motor and a vehicle having same. The motor comprises a stator body, An oil groove surrounding the periphery of the stator body is formed in the stator body. The stator body is further provided with first oil channels communicated with the oil groove in the axial direction of the stator body, the first oil channels extend to at least one end of the stator body, and the first oil channels are adapted to guide a cooling medium to the end of the stator body. The stator body is further provided with second oil channels communicated with the oil groove in the radial direction of the stator body, and the oil groove is communicated with stator slots by means of the second oil channels.

Description

Electric motors and vehicles equipped with them

[0001] This application claims priority to Chinese patent application No. 202410698664.3, filed on May 31, 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] The temperature of the motor will continue to rise during use, so it is necessary to cool the motor in time to avoid overheating and affecting the service life of the motor. Summary of the Invention

[0004] This disclosure aims to at least solve one of the technical problems existing in the related art. To this end, some embodiments of this disclosure propose an electric motor. According to some embodiments of the electric motor of this disclosure, a first oil passage is formed on the stator body, communicating axially with an oil groove in the stator body. The first oil passage guides the cooling medium to the end of the stator body. A second oil passage is also formed on the stator body, communicating radially with the oil groove in the stator body. The second oil passage connects the oil groove to the stator slot and guides the cooling medium into the stator slot. Therefore, the electric motor of some embodiments of this disclosure can cool both the winding ends and the windings in the stator slots, improving the heat dissipation effect of the motor.

[0005] Some embodiments of this disclosure also propose a vehicle having the above-described motor.

[0006] According to this disclosure, some electric motors include: a stator body. The stator body has stator slots and an oil groove surrounding its outer periphery. The stator body also has at least one first oil passage forming an axial communication with the oil groove in the stator body, the at least one first oil passage extending axially in the stator body and reaching at least one end of the stator body. The at least one first oil passage is adapted to guide a cooling medium to the end of the stator body. The stator body also has at least one second oil passage forming a radial communication with the oil groove in the stator body, the at least one second oil passage connecting the oil groove to the stator slot.

[0007] According to some embodiments of the present disclosure, the motor has a first oil passage axially connected to an oil groove in the stator body, and a second oil passage radially connected to the oil groove in the stator body. The first oil passage extends axially along the stator body to both ends of the winding, allowing coolant to be sprayed onto the ends of the winding, thus cooling the winding ends. The second oil passage connects the oil groove to the stator slot, allowing coolant in the oil groove to flow into the stator slot, thus cooling the winding in the stator slot. Therefore, the motor of some embodiments of the present disclosure, through the first and second oil passages, can achieve cooling of both the winding ends and the winding in the stator slot, improving the motor's heat dissipation effect.

[0008] In some embodiments, the at least one first oil passage includes a plurality of first oil passages configured to be spaced apart circumferentially on the stator body and arranged parallel to each other. The at least one second oil passage includes a plurality of second oil passages configured to be spaced apart circumferentially on the stator body; the axes of the plurality of first oil passages intersect the axes of the plurality of second oil passages.

[0009] In some embodiments, the stator body includes a first stator portion and a plurality of second stator portions. A first sub-slot is formed on the radially inner side of the first stator portion. The plurality of second stator portions are respectively disposed on both sides of the first stator portion in the thickness direction, and a second sub-slot communicating with the first sub-slot is formed on any one of the plurality of second stator portions. The first sub-slot and the second sub-slot together constitute the stator groove. The diameter of the second stator portion is larger than the diameter of the first stator portion, and the oil groove is defined between the outer peripheral surface of the first stator portion and two adjacent second stator portions.

[0010] In some embodiments, the first stator portion has a first notch extending radially in the first stator portion, the first notch extending radially in the first stator portion and being spaced apart from the first sub-slot in the first stator portion radially. The second stator portion has a communicating channel extending axially in the second stator portion and communicating with the second sub-slot, the communicating channel being axially opposite to at least a portion of the first notch in the stator body.

[0011] In some embodiments, the second stator portion includes: a first stator lamination, a second stator lamination, and a third stator lamination. The first stator lamination has a second sub-groove, and a first oil injection hole separated from the second sub-groove is provided on the outer periphery of the first stator lamination. The second stator lamination is disposed on the side of the first stator lamination near the first stator portion, and a second oil injection hole communicating with the first oil injection hole is provided on the second stator lamination. The second stator lamination also has the second sub-groove. The third stator lamination is disposed between the second stator lamination and the first stator portion, and a third oil injection hole communicating with the oil groove and the second oil injection hole is provided on the third stator lamination. The third stator lamination also has the second sub-groove and a fourth oil injection hole communicating with the second sub-groove. The fourth oil injection hole is configured as the communicating channel, and the fourth oil injection hole communicates with the first notch portion. The first oil injection hole, the second oil injection hole, and the third oil injection hole together constitute the first oil passage.

[0012] In some embodiments, the diameter of the first injection hole is R1, the diameter of the second injection hole is R2, and the diameter of the third injection hole is R3, and satisfies: R1 < R2 = R3.

[0013] In some embodiments, the first stator lamination has 2N first oil injection holes, the second stator lamination has N second oil injection holes, and the third stator lamination has N oil injection holes. The oil injection directions of adjacent first oil injection holes are opposite, and each of the 2N first oil injection holes is connected to one of the N second oil injection holes.

[0014] In some embodiments, the motor further includes a winding and an insulating layer. The winding is housed within the stator slot. The insulating layer covers the outer surface of the winding, and an oil-guiding notch is formed on the radially outer side of the insulating layer.

[0015] In some embodiments, 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 are staggered at positions on the radially outer side of the winding and are spaced apart radially on the stator body to form the oil guide notch.

[0016] Vehicles according to some embodiments of the present disclosure include the motor described above. Because the vehicles according to some embodiments of the present disclosure are equipped with the motor described above, the heat dissipation performance of the vehicles is better when the vehicles according to some embodiments of the present disclosure are running, thus improving the stability and reliability of the vehicles during operation.

[0017] 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

[0018] 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:

[0019] Figure 1A is a structural diagram of the upper stator body of an electric motor according to some embodiments of the present disclosure;

[0020] Figure 1B is a perspective view of the stator body of an electric motor according to some embodiments of the present disclosure;

[0021] Figure 2 is a structural diagram of a first stator lamination according to some embodiments of the present disclosure;

[0022] Figure 3 is a structural diagram of the first stator section according to some embodiments of the present disclosure;

[0023] Figure 4 is a temperature diagram of a winding according to some embodiments of the present disclosure;

[0024] Figure 5A is a cross-sectional view of a first stator portion according to some embodiments of the present disclosure;

[0025] Figure 5B is another cross-sectional view of the first stator portion according to some embodiments of the present disclosure;

[0026] Figure 6A is a cross-sectional view of a third stator lamination according to some embodiments of the present disclosure;

[0027] Figure 6B is another cross-sectional view of a third stator lamination according to some embodiments of the present disclosure;

[0028] Figure 7 is a schematic diagram of the flow direction of coolant when cooling the winding ends according to some embodiments of the present disclosure;

[0029] Figure 8 is a schematic diagram of the flow direction of coolant when cooling the stator slot windings according to some embodiments of the present disclosure;

[0030] Figure 9 is a structural diagram of a second stator lamination according to some embodiments of the present disclosure;

[0031] Figure 10 is a structural diagram of a third stator lamination according to some embodiments of the present disclosure;

[0032] Figure 11 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0033] Reference numerals: 100, motor; 1000, vehicle; 11, first stator section; 101, first sub-slot; 102, first notch section; 103, oil groove; 104, second sub-slot; 21, second stator section; 211, first stator lamination; 212, second stator lamination; 213, third stator lamination; 201, first oil injection hole; 202, second oil injection hole; 203, third oil injection hole; 204, connecting channel; 12, winding; 13, insulating paper; 301, oil guide notch. Detailed Implementation

[0034] 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.

[0035] In related technologies, coolant is typically sprayed onto the winding ends by evenly distributed oil nozzles at both ends of the stator body, located at different pitch circles. Alternatively, coolant can be directly introduced into the stator slots for immersion cooling of the windings within the slots. However, these technologies only allow for a single cooling method. That is, only one method—in-slot cooling or end-spraying—can be used to cool the windings, resulting in uneven cooling and poor cooling effect.

[0036] Therefore, some embodiments of this disclosure provide an electric motor.

[0037] The following describes an electric motor according to some embodiments of the present disclosure with reference to Figures 1A to 10.

[0038] The motor 100 includes a stator body. Stator slots are formed on the stator body, and an oil groove 103 is also formed on the stator body surrounding its outer periphery. A first oil passage is formed on the stator body, communicating axially with the oil groove 103. The first oil passage extends axially to at least one end of the stator body. The first oil passage is adapted to guide a cooling medium to the end of the stator body. A second oil passage is also formed on the stator body, communicating radially with the oil groove 103, connecting the oil groove 103 to the stator slots.

[0039] For example, the motor 100 includes a stator body and a winding 12. The winding 12 is embedded in the stator body by means of wire insertion to form a stator assembly. The stator assembly is fixed in the motor 100 housing by means of heat fitting. A liquid inlet is formed on the motor 100 housing, and an oil groove 103 communicating with the liquid inlet is formed on the stator body. The oil groove 103 surrounds the outer periphery of the stator body, and coolant can enter into the oil groove 103 through the liquid inlet. The coolant can be oil. A first oil passage communicating with the oil groove 103 in the axial direction of the stator body and a second oil passage communicating with the oil groove 103 in the radial direction of the stator body are formed on the stator body.

[0040] The first oil passage extends axially along the stator body and to both ends of the winding 12. Coolant can be sprayed onto the ends of the winding 12 through the first oil passage, thus cooling the ends of the winding 12. The second oil passage connects the oil trough 103 to the stator slot. Coolant in the oil trough 103 can flow into the stator slot through the second oil passage, thus cooling the winding 12 in the stator slot. Therefore, the motor 100 of some embodiments of this disclosure, by providing the first and second oil passages, can achieve both cooling of the ends of the winding 12 and cooling of the winding 12 in the stator slot, improving the heat dissipation effect of the motor 100.

[0041] According to some embodiments of the present disclosure, the motor 100 has a first oil passage axially connected to the oil groove 103 in the stator body, and a second oil passage radially connected to the oil groove 103 in the stator body. The first oil passage extends axially along the stator body to both ends of the winding 12, allowing coolant to be sprayed onto the ends of the winding 12, thus cooling the ends of the winding 12. The second oil passage connects the oil groove 103 to the stator slot, allowing coolant in the oil groove 103 to flow into the stator slot, thus cooling the winding 12 within the stator slot. Therefore, the motor 100 of some embodiments of the present disclosure, by providing the first and second oil passages, can achieve both cooling of the ends of the winding 12 and cooling of the winding 12 within the stator slot, improving the heat dissipation effect of the motor 100.

[0042] In some embodiments, the motor 100 includes a plurality of first oil passages and a plurality of second oil passages. The plurality of first oil passages are configured to be spaced apart circumferentially on the stator body and parallel to each other. The plurality of second oil passages are configured to be spaced apart circumferentially on the stator body. The axes of the plurality of first oil passages and the axes of the plurality of second oil passages intersect each other.

[0043] For example, the motor 100 includes a plurality of first oil passages. The plurality of first oil passages are spaced apart and arranged in parallel in the circumferential direction of the stator body. By providing a plurality of first oil passages on the stator body, coolant can be sprayed from multiple angles through the plurality of first oil passages to the ends of the winding 12, so that the coolant can be evenly distributed to the ends of the winding 12, thereby improving the cooling effect on the ends of the winding 12.

[0044] The motor 100 also includes multiple second oil passages, each corresponding to a specific stator slot. These second oil passages are spaced apart circumferentially around the stator body. This arrangement ensures that each second oil passage is radially aligned with its corresponding stator slot, and also allows for connection between the stator slot and the oil sump 103 via multiple different second oil passages, thereby achieving cooling of the windings 12 within the multiple stator slots and improving the heat dissipation of the motor 100.

[0045] In some embodiments, as shown in Figures 1A to 3, the stator body includes a first stator portion 11 and a plurality of second stator portions 21. A first sub-slot 101 is formed on the radially inner side of the first stator portion 11. The plurality of second stator portions 21 are disposed on both sides of the first stator portion 11 in the thickness direction, and a second sub-slot 104 communicating with the first sub-slot 101 is formed on the second stator portion 21. The first sub-slot 101 and the second sub-slot 104 together constitute a stator slot. The diameter of the second stator portion 21 is larger than the diameter of the first stator portion 11, and an oil groove 103 is defined between the outer peripheral surface of the first stator portion 11 and two adjacent second stator portions 21.

[0046] For example, the stator body is composed of a first stator portion 11 and a second stator portion 21. A second oil passage is formed on the first stator portion 11, and a first oil passage is formed on the second stator portion 21. The stator body includes two second stator portions 21, which are respectively disposed on both sides of the first stator portion 11 in the thickness direction. A first sub-slot 101 is formed on the side of the first stator portion 11 near the center, and a second sub-slot 104 is formed on the side of the second stator portion 21 near the center. The first sub-slot 101 and the second sub-slot 104 together define a stator slot, and the winding 12 is housed in the first sub-slot 101 and the second sub-slot 104. The diameter of the first stator portion 11 is smaller than the diameter of the second stator portion 21, and an oil groove 103 is defined between the outer peripheral surface of the first stator portion 11 and the two adjacent second stator portions 21.

[0047] The oil trough 103 is connected to the first oil passage and the second oil passage respectively. The coolant can flow into the first oil passage and the second oil passage through the oil trough 103 respectively to cool the end of the winding 12 and the winding 12 in the stator slot, thereby improving the heat dissipation effect of the motor 100.

[0048] In some embodiments, as shown in FIGS. 5A to 6B, a first stator portion 11 has a first notch 102 extending radially in the first stator portion 11. The first notch 102 extends radially in the first stator portion 11 and is radially spaced from a first sub-slot 101 in the first stator portion 11. A connecting channel 204 is formed on the second stator portion 21, extending axially in the second stator portion 21 and communicating with a second sub-slot 104. At least a portion of the connecting channel 204 and the first notch 102 are axially opposite each other in the stator body.

[0049] For example, a plurality of first notches 102 extending radially along the first stator portion 11 are formed in the circumferential direction of the first stator portion 11. Each of the plurality of first notches 102 corresponds to a plurality of first sub-slots 101, and the plurality of first notches 102 extend radially along the first stator portion 11 and are spaced apart from each other. The first sub-slots 101 adjacent to the first notches 102 are spaced apart from the first notches 102.

[0050] The second stator portion 21 has a plurality of connecting channels 204 extending axially in the second stator portion 21. The plurality of connecting channels 204 correspond to a plurality of first notches 102 and a plurality of second sub-slots 104. At least a portion of the connecting channel 204 and the corresponding first notch 102 are axially aligned and the connecting channel 204 communicates with the corresponding second sub-slot 104.

[0051] The coolant in the oil tank 103 can flow radially along the stator body through the first notch 102. When the coolant flows to the connecting channel 204, it flows into the stator slot through the connecting channel 204, thereby cooling the winding 12 in the stator slot, improving the cooling effect of the winding 12 in the stator slot, and improving the heat dissipation effect of the motor 100.

[0052] In some embodiments, as shown in FIG2, FIG9 and FIG10, the second stator portion 21 includes: a first stator lamination 211, a second stator lamination 212 and a third stator lamination 213.

[0053] A second sub-groove 104 is formed on the first stator lamination 211, and a first oil injection hole 201 is provided on the outer periphery of the first stator lamination 211, which is separated from the second sub-groove 104.

[0054] The second stator lamination 212 is disposed on the side of the first stator lamination 211 near the first stator portion 11. The second stator lamination 212 is provided with a second oil injection hole 202 communicating with the first oil injection hole 201, and a second sub-groove 104 is provided on the second stator lamination 212.

[0055] The third stator lamination 213 is disposed between the second stator lamination 212 and the first stator portion 11. A third oil injection hole 203 is formed on the third stator lamination 213, connecting the oil groove 103 and the second oil injection hole 202. A second sub-groove 104 and a fourth oil injection hole communicating with the second sub-groove 104 are also formed on the third stator lamination 213. The fourth oil injection hole is configured as a connecting channel 204 and communicates with the first notch portion 102. The first oil injection hole 201, the second oil injection hole 202, and the third oil injection hole 203 together define the first oil passage.

[0056] For example, the second stator section 21 is composed of a first stator lamination 211, a second stator lamination 212, and a third stator lamination 213. Second sub-grooves 104 are formed on the side of the first stator lamination 211, the second stator lamination 212, and the third stator lamination 213 near the axis of the stator body. A first oil injection hole 201, a second oil injection hole 202, and a third oil injection hole 203 are formed on the first stator lamination 211, the second stator lamination 212, and the third stator lamination 213, respectively.

[0057] The shape and size of the first fuel injection hole 201, the second fuel injection hole 202 and the third fuel injection hole 203 are not limited here. The shape of the first fuel injection hole 201, the second fuel injection hole 202 and the third fuel injection hole 203 can be changed according to the design of the motor 100.

[0058] The first oil injection hole 201 is located on the yoke of the first stator lamination 211, near the outer diameter of the first stator lamination 211. The second oil injection hole 202 is located on the yoke of the second stator lamination 212, near the outer diameter of the second stator lamination 212. The third oil injection hole 203 is located on the yoke of the third stator lamination 213, near the outer diameter of the third stator lamination 213.

[0059] A second stator lamination 212 is disposed on the side of the first stator lamination 211 near the first stator portion 11, and a third stator lamination 213 is disposed on the side of the second stator lamination 212 near the first stator portion 11. The first oil injection hole 201, the second oil injection hole 202, and the third oil injection hole 203 together define a first oil passage. Coolant in the oil trough 103 enters the second oil injection hole 202 through the third oil injection hole 203 and is finally sprayed onto the end of the winding 12 through the first oil injection hole 201, thus achieving cooling of the end of the winding 12.

[0060] A fourth oil injection hole, communicating with the second sub-slot 104, is also formed on the third stator lamination 213. The fourth oil injection hole can be configured as a communicating channel 204, and at least a portion of the fourth oil injection hole and the first notch 102 are axially aligned with each other on the stator body. Coolant in the oil tank 103 can flow radially along the stator body through the first notch 102. When the coolant flows to the fourth oil injection hole, it flows into the stator slot through the fourth oil injection hole, thereby cooling the winding 12 in the stator slot.

[0061] Thus, the motor 100 of some embodiments of this disclosure, through the above-described configuration, can cool both the ends of the winding 12 and the winding 12 in the stator slot, thereby improving the uniformity of heat dissipation of the motor 100 and enhancing the heat dissipation effect of the motor 100.

[0062] In some embodiments, the diameter of the first oil injection hole 201 is R1, the diameter of the second oil injection hole 202 is R2, and the diameter of the third oil injection hole 203 is R3, satisfying the condition: R1 < R2 = R3, that is, the diameter of the second oil injection hole 202 is the same as the diameter of the third oil injection hole 203, and the diameter of the first oil injection hole 201 is smaller than the diameters of the second oil injection hole 202 and the third oil injection hole 203. During the stacking process of the first stator lamination 211, the second stator lamination 212, and the third stator lamination 213, the second oil injection hole 202 and the third oil injection hole 203 are arranged facing each other, and the first oil injection hole 201 is staggered with the second oil injection hole 202 and the third oil injection hole 203.

[0063] This configuration creates a stepped, circumferentially inclined first oil channel that facilitates the flow and distribution of coolant towards the stator body during heat dissipation. This allows the coolant in the first oil channel to be sprayed circumferentially onto the ends of the winding 12, achieving direct spray cooling of the ends of the winding 12 of the motor 100. This effectively reduces the temperature of the ends of the stator winding 12 and improves the heat dissipation effect of the motor 100.

[0064] In some embodiments, as shown in Figures 5A and 5B, 2N first oil injection holes 201 are formed on the first stator lamination 211, N second oil injection holes 202 are formed on the second stator lamination 212, and N third oil injection holes 203 are formed on the third stator lamination 213. During the stacking process of the second stator lamination 212 and the third stator lamination 213, the N second oil injection holes 202 on the second stator lamination 212 are arranged in a one-to-one correspondence with the N third oil injection holes formed on the third stator lamination 213 along the axial direction of the stator body. During the stacking process of the first stator lamination 211, the second stator lamination 212, and the third stator lamination 213, two adjacent first oil injection holes 201 are correspondingly arranged with one second oil injection hole 202.

[0065] In other words, one of two adjacent first oil injection holes 201 is connected to at least a portion of the second oil injection hole 202, and the other of two adjacent first oil injection holes 201 is connected to at least another portion of the second oil injection hole 202. This allows the oil injection directions of two adjacent first oil injection holes 201 to be opposite in the circumferential direction of the stator body, enabling the coolant to be sprayed in multiple directions onto the ends of the winding 12 when passing through multiple first oil injection holes 201. This increases the coolant coverage area, thereby improving the heat dissipation effect of the motor 100 and ensuring the temperature consistency of the motor 100.

[0066] In some embodiments, as shown in Figures 6A and 6B, the motor 100 further includes a winding 12 and an insulating layer. The winding 12 is housed in a stator slot; the insulating layer covers the outer surface of the winding 12, and an oil guide notch 301 is formed on the radially outer side of the insulating layer.

[0067] For example, the aforementioned insulating layer may include insulating paper 13. At least a portion of the winding 12 is housed within the stator slots, and the insulating paper 13 is also housed within the stator slots, with the width of the insulating paper 13 matching the width of the stator slots. The insulating paper 13 within the stator slots provides necessary insulation protection for the motor 100, ensuring that insulation breakdown and discharge do not occur within the motor 100, thereby preventing faults such as short circuits, leakage, and burnout, and ultimately ensuring the stable operation of the motor 100. The insulating paper 13 wraps around the outer periphery of the winding 12, with a certain gap between it and the winding 12. During the operation of the motor 100, the winding 12 may be subjected to mechanical vibration and friction from external or internal sources. The insulating paper 13 wrapped around the winding 12 forms a protective layer, reducing mechanical damage to the winding 12.

[0068] Furthermore, the insulating paper 13 can isolate the winding 12 from the external environment to prevent dust, oil, and other impurities from adhering to the winding 12, keeping the winding 12 clean and reducing the risk of electrical faults caused by impurities. The outer radial layer of the insulating paper 13 has an oil-guiding notch 301. Coolant entering the stator slot through the fourth oil injection hole can flow through the oil-guiding notch 301 into the gap between the insulating paper 13 and the winding 12, allowing the coolant to directly contact and exchange heat with the winding inside the stator slot. This achieves direct cooling of the winding 12 inside the stator slot, improving the heat dissipation effect of the motor 100 and enhancing the stability and reliability of the motor 100's operation.

[0069] In some embodiments, insulating paper 13 is disposed around the outer periphery of winding 12. The first side edge and the second side edge of insulating paper 13 are staggered, and the first side edge of insulating paper 13 is set to 1 / 2 of the width of insulating paper 13, and the second side edge of insulating paper 13 is set to 3 / 4 of the width of insulating paper 13, so that insulating paper 13 can completely wrap the winding 12 to protect the winding 12, reduce damage to the winding 12, and improve the stability and reliability of motor 100 during operation.

[0070] Furthermore, the first and second side edges of the insulating paper 13 are radially spaced apart in the stator body to form an oil guiding notch 301. A third oil passage is formed between the first and second side edges of the insulating paper 13 to allow coolant flow and guide the coolant flow. The third oil passage is connected to the gap between the insulating paper 13 and the winding 12.

[0071] The coolant entering the stator slot through the fourth oil injection hole can enter the third oil passage through the oil guide notch 301. The coolant flows along the third oil passage into the gap between the insulating paper 13 and the winding 12, so that the coolant can directly contact the winding in the stator slot and exchange heat. This achieves direct cooling of the winding 12 inside the stator slot, improves the heat dissipation effect of the motor 100, and enhances the stability and reliability of the motor 100 operation.

[0072] It should be noted that the first and second edges of the insulating paper 13 are staggered on the radial outer side of the winding 12 and are spaced apart on the radial side of the stator body to form an oil guiding notch 301.

[0073] This disclosure also provides a vehicle 1000 according to some embodiments. As shown in FIG11, the vehicle 1000 is equipped with the aforementioned motor 100. Since the vehicle 1000 according to some embodiments of this disclosure is equipped with the aforementioned motor 100, the vehicle has better heat dissipation performance when it is running, thus improving the stability and reliability of the vehicle during operation.

[0074] In the description of this disclosure, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "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.

[0075] In the description of this disclosure, "first feature" and "second feature" may include one or more of the features.

[0076] In the description of this disclosure, "multiple" means two or more.

[0077] In the description of this disclosure, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or it may include the first feature and the second feature not being in direct contact but being in contact through another feature between them.

[0078] 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.

[0079] 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.

[0080] 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 (100), comprising: a stator body, on which a stator slot and an oil groove (103) surrounding an outer periphery of the stator body are formed; wherein at least one first oil passage, which communicates with the oil groove (103) in an axial direction of the stator body, is further formed on the stator body, the at least one first oil passage extending in the axial direction of the stator body and extending to at least one end of the stator body, the at least one first oil passage being adapted to guide a cooling medium to the end of the stator body; at least one second oil passage, which communicates the oil groove (103) with the stator slot in a radial direction of the stator body, is further formed on the stator body.

2. The electric machine (100) according to claim 1, wherein the at least one first oil passage comprises a plurality of first oil passages, which are configured to be arranged in a circumferential direction of the stator body and arranged in parallel to each other; the at least one second oil passage comprises a plurality of second oil passages, which are configured to be arranged in the circumferential direction of the stator body; and axes of the plurality of first oil passages intersect with axes of the plurality of second oil passages.

3. The electric machine (100) of claim 2, wherein, the stator body comprises: a first stator portion (11), a first sub-slot (101) being formed on a radially inner side of the first stator portion (11); and a plurality of second stator portions (21), which are respectively arranged on both sides of the first stator portion (11) in a thickness direction, each of the plurality of second stator portions (21) being formed with a second sub-slot (104) which communicates with the first sub-slot (101), the first sub-slot (101) and the second sub-slot (104) together constituting the stator slot; wherein a diameter of the second stator portion (21) is greater than a diameter of the first stator portion (11), and an outer peripheral surface of the first stator portion (11) and two adjacent second stator portions (21) define the oil groove (103).

4. The electric machine (100) of claim 3, wherein, the first stator portion (11) is formed with a first notch portion (102) extending in a radial direction of the first stator portion (11), the first notch portion (102) extending in the radial direction of the first stator portion (11) and being arranged in parallel to the first sub-slot (101) in the radial direction of the first stator portion (11); the second stator portion (21) is formed with a communication passage (204) extending in an axial direction of the second stator portion (21) and communicating with the second sub-slot (104), the communication passage (204) being arranged in direct opposition to at least part of the first notch portion (102) in the axial direction of the stator body.

5. The electric machine (100) of claim 4, wherein, the second stator portion (21) comprises: a first stator lamination (211), on which the second sub-slot (104) is arranged, and an outer periphery of the first stator lamination (211) is provided with a first oil injection hole (201) which is isolated from the second sub-slot (104); and a second stator lamination (212), on which the first notch portion (102) is arranged, and an outer periphery of the second stator lamination (212) is provided with a second oil injection hole (202) which is isolated from the first notch portion (102). A second stator lamination (212) is arranged on a side of the first stator lamination (211) close to the first stator portion (11), and the second stator lamination (212) is provided with a second oil injection hole (202) in communication with the first oil injection hole (201), and the second stator lamination (212) is further provided with the second sub-slot (104). A third stator lamination (213) is arranged between the second stator lamination (212) and the first stator portion (11), and the third stator lamination (213) is provided with a third oil injection hole (203) in communication with the oil groove (103) and the second oil injection hole (202), and the third stator lamination (213) is further provided with the second sub-slot (104) and a fourth oil injection hole in communication with the second sub-slot (104), the fourth oil injection hole is configured as the communication passage (204), and the fourth oil injection hole is in communication with the first notch portion (102). The first oil injection hole (201), the second oil injection hole (202) and the third oil injection hole (203) jointly constitute the first oil channel.

6. The electric machine (100) of claim 5, wherein, The diameter of the first oil injection hole (201) is R1, the diameter of the second oil injection hole (202) is R2, and the diameter of the third oil injection hole (203) is R3, and R1 < R2 = R3 is satisfied.

7. The electric machine (100) of claim 5, wherein, The first stator lamination (211) is provided with 2N first oil injection holes (201), the second stator lamination (212) is provided with N second oil injection holes (202), and the third stator lamination (213) is provided with N third oil injection holes (203). Among the 2N first oil injection holes (201), the oil injection directions of two adjacent first oil injection holes (201) are opposite, and one of the N second oil injection holes (202) is in communication.

8. The electric machine (100) according to any one of claims 1 to 7, further comprising: a winding (12) housed in the stator slot; and an insulation layer covering an outer surface of the winding (12), a radially outer side of the insulation layer being formed with an oil guide notch (301). The insulation layer is arranged around an outer periphery of the winding (12), and a first side edge and a second side edge of the insulation layer are staggered at a position radially outside the winding (12) and are arranged in a radial direction of the stator body to form the oil guide notch (301).

9. The electric machine (100) of claim 8, wherein, 10. A vehicle (1000) comprising the electric machine (100) according to any one of claims 1 to 9. ​

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