Stator assembly, motor and automobile

Abstract

The invention discloses a stator assembly, a motor and an automobile, and the stator assembly comprises an iron core ring, the end part of the iron core ring is provided with a plurality of installation grooves in a penetrating manner, the installation grooves are arranged at intervals along the circumferential direction of the iron core ring, the iron core ring is provided with an oil injection core section located in the middle, an oil injection flow channel is formed in the oil injection core section, and the oil injection flow channel is communicated with the installation grooves; an oil injection port of the oil injection runner is formed in the side surface of the oil injection core section, and oil injected from the oil injection port enters the oil injection core section in the radial direction of the iron core ring and flows in the axial direction of the iron core ring after passing through the multiple mounting grooves; and the coil winding is at least partially arranged in the plurality of mounting grooves. After oil liquid is injected into the oil injection port, the oil liquid flows and flows out from the two ends of the mounting groove, the oil liquid makes contact with the coil winding, heat on the coil winding can be directly transmitted to the oil liquid, the oil liquid is injected into the mounting groove from the oil injection flow channel continuously, continuous heat dissipation of the coil winding is guaranteed, and the service life of the motor is guaranteed on the whole.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a stator assembly, a motor and an automobile. Background Art

[0002] New energy vehicles use motors as power output. During the operation of new energy vehicles, especially when the motor is running at high load, the coil windings in the stator assembly of the motor generate heat, and the temperature of the windings rises. The heat on the coil windings needs to be transferred to the motor housing through the core ring. The cooling effect is poor, and the coil windings of the stator assembly are in a high temperature state, which can easily shorten the life of the motor. Summary of the invention

[0003] The main purpose of the present invention is to provide a stator assembly, aiming to ensure the life of the motor.

[0004] To achieve the above object, the stator assembly proposed in the present invention includes:

[0005] An iron core ring, with a plurality of mounting grooves formed at the end thereof, the plurality of mounting grooves being arranged at intervals along the circumference of the iron core ring, the iron core ring having an oil injection core segment in the middle, an oil injection flow channel being formed on the oil injection core segment, the oil injection flow channel being connected to the plurality of mounting grooves, the oil injection port of the oil injection flow channel being opened on the side surface of the oil injection core segment, the oil injected from the oil injection port entering the oil injection core segment along the radial direction of the iron core ring, and flowing along the axial direction of the iron core ring after passing through the plurality of mounting grooves; and,

[0006] The coil winding is at least partially disposed in the plurality of mounting grooves.

[0007] In one embodiment, the core ring includes two oil guide segments respectively located on both sides of the oil injection core segment, the inner side end of the mounting groove of the oil injection core segment is closed, and the inner diameter of the oil injection core segment is smaller than the inner diameter of the oil guide segment, and the inner side end of the mounting groove of the oil guide segment is open;

[0008] The stator assembly also includes two closed rings, which are arranged one by one corresponding to the oil guide section, the outer wall of the closed ring and the inner wall of the oil guide section are against each other, and the inner diameter of the closed ring is consistent with the inner diameter of the oil injection core section.

[0009] In one embodiment, the closed ring includes magnetic conductive segments spaced apart along the circumferential direction thereof, the inner sides of the magnetic conductive segments are flush with the closed ring, and the outer sides of the magnetic conductive segments are against the oil conductive segments.

[0010] In one embodiment, the closed ring includes magnetic isolation segments spaced apart along the circumferential direction thereof, the magnetic isolation segments are aligned one by one with the mounting grooves, and the magnetic isolation segments connect two adjacent magnetic conductive segments.

[0011] In one embodiment, a plurality of conducting wires of the coil winding are sequentially arranged in the installation groove along the radial direction of the core ring.

[0012] In one embodiment, the oil injection channel includes a connecting groove arranged on the outside of the oil injection core segment, the oil injection holes are arranged one by one corresponding to the mounting grooves, the oil injection port connects the mounting groove and the connecting groove, and the oil collected in the connecting groove is used to be delivered to the oil injection port respectively and simultaneously.

[0013] In one embodiment, the core ring includes two oil guiding segments respectively located on both sides of the oil injection core segment, the outer diameter of the oil injection core segment is smaller than the oil guiding segment, the oil injection flow channel includes a connecting groove formed between the two oil guiding segments, the oil injection holes are arranged one by one corresponding to the mounting grooves, the oil injection port connects the mounting groove and the connecting groove, and the oil collected in the connecting groove is used to be delivered to the oil injection port at the same time.

[0014] In one embodiment, an insulating member is provided between a portion of the coil winding located in the installation slot and a side wall of the installation slot.

[0015] The present invention further provides a motor, comprising a stator assembly, the stator assembly comprising:

[0016] An iron core ring, with a plurality of mounting grooves formed at the end thereof, the plurality of mounting grooves being arranged at intervals along the circumference of the iron core ring, the iron core ring having an oil injection core segment in the middle, an oil injection flow channel being formed on the oil injection core segment, the oil injection flow channel being connected to the plurality of mounting grooves, the oil injection port of the oil injection flow channel being opened on the side surface of the oil injection core segment, the oil injected from the oil injection port entering the oil injection core segment along the radial direction of the iron core ring, and flowing along the axial direction of the iron core ring after passing through the plurality of mounting grooves; and,

[0017] The coil winding is at least partially disposed in the plurality of mounting grooves.

[0018] The present invention further provides a vehicle, comprising a motor, the motor comprising a stator assembly, and the stator assembly comprising:

[0019] An iron core ring, with a plurality of mounting grooves formed at the end thereof, the plurality of mounting grooves being arranged at intervals along the circumference of the iron core ring, the iron core ring having an oil injection core segment in the middle, an oil injection flow channel being formed on the oil injection core segment, the oil injection flow channel being connected to the plurality of mounting grooves, the oil injection port of the oil injection flow channel being opened on the side surface of the oil injection core segment, the oil injected from the oil injection port entering the oil injection core segment along the radial direction of the iron core ring, and flowing along the axial direction of the iron core ring after passing through the plurality of mounting grooves; and,

[0020] The coil winding is at least partially disposed in the plurality of mounting grooves.

[0021] The technical solution of the present invention is to set up a mounting groove and an oil injection flow channel. After the oil is injected into the mounting groove from the oil injection port of the oil injection flow channel, the oil can flow along the extension direction of the mounting groove and flow out from the two ends of the mounting groove. The oil can fill the internal space of the mounting groove and ensure sufficient contact between the oil and the coil winding. The coil winding generates heat after being energized, and the heat on the coil winding in the mounting groove can be directly transferred to the oil. During the flow of the oil, the oil is constantly mixed, so that the temperature of the oil is kept balanced, the local temperature rise of the oil at the outer edge of the coil winding is reduced, and the oil The temperature difference between the oil and the coil winding ensures the speed at which the heat on the coil winding is transferred to the oil; the oil can be continuously injected into the installation groove from the oil injection channel, and the oil that has absorbed heat and heated up can be discharged from the end of the installation groove, ensuring the continuous heat dissipation of the coil winding; the oil injected into the oil injection core section can flow from the middle of the iron core ring to the two ends of the iron core ring, reducing the flow distance of the oil, reducing the temperature rise of the oil at the end of the installation groove, increasing the temperature difference between the oil at the end of the installation groove and the coil winding, so that the heat on the coil winding at the end of the installation groove is quickly transferred to the oil. Overall, the heat dissipation efficiency of the coil winding is improved, the temperature of the coil winding is reduced, the high temperature state of the coil winding can be reduced, and the life of the motor is guaranteed overall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a stator assembly of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the middle iron core ring;

[0025] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0026] Figure 4 for Figure 1 A schematic plan view of the stator assembly;

[0027] Figure 5 for Figure 4 Schematic diagram of the cross section along BB;

[0028] Figure 6 for Figure 5 A partial enlarged view of point C in the middle;

[0029] Figure 7 for Figure 1 Schematic diagram of the structure of the middle oil injection section.

[0030] Description of Figure Numbers:

[0031] 100. stator assembly; 1. core ring; 11. oil-filled core section; 12. oil-conducting section; 2. mounting groove; 3. oil-filling channel; 31. oil-filling port; 32. connecting groove; 33. oil-filling cavity; 4. coil winding; 5. closed ring; 51. magnetic conductive section; 52. magnetic isolation section; 6. insulating member.

[0032] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] New energy vehicles use motors as power output, especially flat wire motors. Flat wire motors have outstanding advantages such as compact structure and high power density, but flat wire motors usually have a high heat load, which is much higher than conventional industrial motors. During the operation of new energy vehicles, especially when the motor is running at high load, the coil windings in the stator assembly of the motor generate heat, and the temperature of the windings rises. The heat on the coil windings needs to be transferred to the motor housing through the iron core ring. The iron core ring increases the heat transfer distance of the coil winding part and reduces the heat dissipation effect of the coil winding part. The heat on the coil winding will accumulate, causing the coil winding of the stator assembly to be in a high temperature state. The motor is in an overheated state at this time, which is easy to shorten the life of the motor.

[0037] The present invention provides a stator assembly.

[0038] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the stator assembly 100 comprises:

[0039] An iron core ring 1 is provided with a plurality of mounting grooves 2 at its end, the plurality of mounting grooves 2 are arranged at intervals along the circumference of the iron core ring 1, the iron core ring 1 has an oil injection core segment 11 in the middle, an oil injection channel 3 is formed on the oil injection core segment 11, the oil injection channel 3 connects the plurality of mounting grooves 2, an oil injection port 31 of the oil injection channel 3 is opened on the side surface of the oil injection core segment 11, the oil injected from the oil injection port 31 enters the oil injection core segment 11 along the radial direction of the iron core ring 1, and after passing through the plurality of mounting grooves 2, flows along the axial direction of the iron core ring 1; and a coil winding 4 is at least partially arranged in the plurality of mounting grooves 2.

[0040] The technical solution of the present invention is provided with the mounting groove 2 and the oil injection channel 3. After the oil is injected into the mounting groove 2 from the oil injection port 31 of the oil injection channel 3, the oil can flow along the extension direction of the mounting groove 2 and flow out from both ends of the mounting groove 2. The oil can fill the internal space of the mounting groove 2 and ensure sufficient contact between the oil and the coil winding 4. The coil winding 4 generates heat after being energized, and the heat on the coil winding 4 in the mounting groove 2 can be directly transferred to the oil. During the flow of the oil, the oil is continuously mixed, so that the temperature of the oil is kept balanced, the local temperature rise of the oil at the outer edge of the coil winding 4 is reduced, the temperature difference between the oil and the coil winding 4 is increased, and the efficiency of the heat transfer from the coil winding 4 to the oil is ensured; the oil is continuously injected into the mounting groove 2 from the oil injection channel 3, and the oil after absorbing heat and heating is discharged from the end of the mounting groove 2, ensuring the continuous heat dissipation of the coil winding 4. The oil injected into the oil injection core segment 11 can flow from the middle of the core ring 1 to the two ends of the core ring 1, respectively, reducing the flow distance of the oil, reducing the temperature rise of the oil in the mounting groove 2, thereby reducing the temperature of the oil at the end of the mounting groove 2, increasing the temperature difference between the oil at the end of the mounting groove 2 and the coil winding 4, so that the heat on the coil winding 4 at the end of the mounting groove 2 is quickly transferred to the oil. Overall, the heat dissipation efficiency of the coil winding 4 is improved, the temperature of the coil winding 4 is reduced, the high temperature state of the coil winding 4 can be reduced, and the life of the motor is guaranteed as a whole.

[0041] The core ring 1 includes two oil guide segments 12 respectively located on both sides of the oil injection core segment 11, the inner end of the mounting groove 2 of the oil injection core segment 11 is closed, and the inner diameter of the oil injection core segment 11 is smaller than the inner diameter of the oil guide segment 12, and the inner end of the mounting groove 2 of the oil guide segment 12 is open; the stator assembly 100 also includes two closed rings 5, the two closed rings 5 ​​are arranged one by one corresponding to the oil guide segments 12, the outer wall of the closed ring 5 and the inner wall of the oil guide segment 12 are against each other, and the inner diameter of the closed ring 5 is consistent with the inner diameter of the oil injection core segment 11.

[0042] The inner end of the mounting groove 2 of the oil injection core segment 11 is closed. After the oil is injected into the oil injection core segment 11, the oil can collide with the inner end of the mounting groove 2 of the oil injection core segment 11, and the oil injected into the oil injection core segment 11 can be guided so that the oil flows along the extension direction of the mounting groove 2. By setting the closed ring 5, the mounting groove 2 can be closed from the inner side of the oil guide segment 12, thereby reducing oil leakage of the mounting groove 2 in the oil guide segment 12.

[0043] In order to ensure the accommodation and installation of the coil winding 4, the radial dimension of the mounting groove 2 of the oil injection core segment 11 is usually ensured to be consistent with the radial length of the mounting groove 2 in the oil guide segment 12. When the inner end of the mounting groove 2 of the oil injection core segment 11 is closed, the inner diameter of the oil injection core segment 11 is usually set to be smaller than the inner diameter of the oil guide segment 12.

[0044] The length of the closed ring 5 is consistent with the length of the oil guide section 12. By setting the inner diameter of the closed ring 5 to be consistent with the inner diameter of the oil injection core section 11, the end of the core ring 1 can be against one side of the oil injection core section 11, and the inner wall of the core ring 1 is made into a smooth arc surface.

[0045] During the rotor installation process, the rotor is installed on the inner side of the core ring 1, that is, the rotor is located on the inner side of the closed ring 5. The closed ring 5 includes magnetic conductive segments 51 arranged at intervals along its circumferential direction, the inner side of the magnetic conductive segments 51 is flush with the closed ring 5, and the outer side of the magnetic conductive segments 51 is against the oil conductive segment 12. The magnetic force on the core ring 1 can be directly transmitted to the magnetic conductive segments 51, and the magnetic force on the magnetic conductive segments 51 can be transmitted to the inner area of ​​the closed ring 5, reducing the air gap in the magnetic force transmission area between the core ring 1 and the stator, reducing the magnetic resistance inside the core ring 1, and ensuring the performance of the motor.

[0046] The magnetic conductive section 51 may be made of ferromagnetic materials such as iron, cobalt, and nickel, so that the magnetic conductive section 51 has a good magnetic conductive effect on magnetic force; specifically, the magnetic conductive section 51 may be made of silicon steel, and the magnetic conductive section 51 includes a plurality of silicon steel sheets arranged in sequence along the axial direction of the closed ring 5, and the plurality of silicon steel sheets may be connected by welding, riveting, or bonding.

[0047] The closed ring 5 includes magnetic isolation segments 52 arranged at intervals along the circumferential direction thereof, the magnetic isolation segments 52 are aligned one by one with the mounting slots 2, and the magnetic isolation segments 52 connect the two adjacent magnetic conductive segments 51. The magnetic isolation segments 52 have a poor magnetic conductivity, and can isolate the conduction of magnetic force between the two adjacent magnetic conductive segments 51, thereby reducing the connection and offset of magnetic force between the connected magnetic conductive segments 51, reducing the magnetic leakage of the stator assembly 100 as a whole, and ensuring the performance of the motor.

[0048] The magnetic isolation section 52 may be made of a weak magnetic conductive material such as epoxy resin, and the connection between the magnetic isolation section 52 and the magnetic conductive section 51 may be made by bonding or casting.

[0049] Along the radial direction from the outer side of the closed ring 5 toward the inner side of the closed ring 5 , the cross-sectional size of the magnetic conductive segment 51 gradually increases, and the cross-sectional size of the magnetic isolation segment 52 gradually decreases.

[0050] See also Figure 4 , Figure 5 and Figure 5 The conductors of the coil winding 4 are arranged in the mounting groove 2 in a plurality of order along the radial direction of the core ring 1. The magnetic force of the core ring 1 can be increased, and the performance of the motor can be enhanced.

[0051] The gaps in the installation slots 2 enable the oil to be filled between the wires of the adjacent coil windings 4 , thereby ensuring the heat dissipation effect of the oil on the coil windings 4 .

[0052] An insulating member 6 is provided between the portion of the coil winding 4 located in the mounting groove 2 and the side wall of the mounting groove 2 , so as to achieve insulation between the side wall of the mounting groove 2 and the coil winding 4 .

[0053] The insulating member 6 may be a protective ring for the wire of the coil winding 4, and the outer peripheral side of the insulating member 6 abuts against the inner wall of the mounting groove 2, so as to fix the coil winding 4 in the mounting groove 2. The insulating member 6 may be made of plastic or wood.

[0054] The insulating members 6 can be arranged in plurality along the axial direction of the core segment. The insulating members 6 are arranged at intervals, which ensures that the conductive wires of the coil winding 4 are exposed and that the oil is in direct contact with the conductive wires of the coil winding 4. The insulating members 6 are located between the conductive wires of the coil winding 4 and the core ring 1, and can ensure a gap between the coil winding 4 and the core ring 1. The oil can flow from between two adjacent insulating members 6 into between the insulating member 6 and the conductive wires of the coil winding 4.

[0055] There is a gap between the insulating member 6 and the side wall of the mounting groove 2 , and when the oil flows along the radial direction of the core segment, the oil can flow through the gap between the insulating member 6 and the side wall of the mounting groove 2 , so that the oil fills the mounting groove 2 .

[0056] See also Figure 6 and Figure 7 Specifically, the span of the mounting groove 2 located in the oil injection core segment 11 is greater than the width of the mounting groove 2 of the oil guide segment 12, so that the coil winding 4 and the side wall of the mounting groove 2 of the oil guide segment 12 are mutually clamped and fixed, thereby fixing the coil winding 4; and a gap for oil flow exists between the insulating member 6 on the coil winding 4 and the side wall of the mounting groove 2 of the oil injection core segment 11. After the oil flows into the mounting groove 2, the oil flows between the insulating member 6 and the side wall of the mounting groove 2, and can quickly fill the mounting groove 2.

[0057] The oil injection channel 3 includes a connecting groove 32 arranged on the outside of the oil injection core section 11, and the oil injection holes are arranged one by one corresponding to the mounting groove 2. The oil injection port 31 connects the mounting groove 2 with the connecting groove 32, and the oil collected in the connecting groove 32 is used to be simultaneously sent to the oil injection port 31. After the oil is injected into the connecting groove 32, the oil fills the connecting groove 32, so that the pressure of the oil out of each oil injection port 31 is close; the oil in the connecting groove 32 can be injected into different oil injection ports 31 respectively, realizing the simultaneous oil supply to multiple oil injection ports 31, so that the oil pressure in multiple oil injection ports 31 is relatively balanced, and further, the oil pressure in multiple mounting grooves 2 is relatively close; the flow rate difference of the oil in multiple mounting grooves 2 is reduced, so that the cooling effect of the coil winding 4 in multiple mounting grooves 2 is close, so that the temperature of each area in the core ring 1 is kept balanced.

[0058] The outer diameter of the oil injection core segment 11 is smaller than the outer diameter of the oil guide segment 12 , and the connecting groove 32 is formed by the area between the two oil guide segments 12 . There is no need to open the connecting groove 32 outside the oil injection core segment 11 , thereby reducing the difficulty of processing the connecting groove 32 .

[0059] The oil injection channel 3 also includes an oil injection chamber 33, which is formed on the bottom wall of the connecting groove 32. A plurality of oil injection chambers 33 are arranged at circumferential intervals of the oil injection core segment 11. After the oil is injected into the oil injection chamber 33, the oil contacts the bottom wall of the oil injection chamber 33 and overflows into the connecting groove 32, so that the oil in the connecting groove 32 is relatively stable. The plurality of oil injection chambers 33 can inject oil into the connecting groove 32 from multiple locations, thereby realizing simultaneous oil injection at multiple points of the connecting groove 32, which is beneficial to ensuring the reorganization of the oil in the connecting groove.

[0060] Specifically, the oil filling port 31 is opened on the bottom wall of the oil filling cavity 33 , so that the oil in the oil filling cavity 33 can directly flow into the corresponding oil filling port 31 .

[0061] See also Figure 1 and Figure 2 The oil guide section 12 is made of ferromagnetic material, so that the oil guide section 12 has a good magnetic conductivity. Specifically, the oil guide section 12 is a silicon steel body. The oil guide section 12 includes a plurality of first silicon steel sheets arranged in sequence along the axial direction of the oil guide section 12. The thickness between the plurality of first silicon steel sheets can be 0.2mm-0.3mm. Specifically, the thickness of the first silicon steel sheet can be 0.25mm. The plurality of first silicon steel sheets are welded, riveted or bonded to form the oil guide section 12.

[0062] The oil injection core segment 11 is made of silicon steel, and includes a plurality of second silicon steel sheets sequentially arranged along the axial direction of the oil guide segment 12 , and the plurality of second silicon steel sheets are welded, riveted or bonded to form the oil guide segment 12 .

[0063] The oil guide section 12 and the oil injection core section 11 can be connected by welding, riveting or bonding.

[0064] During the installation of the stator assembly 100, the outside of the connecting groove 32 is often sealed with the aid of a seal, which may be a motor housing. An opening is provided in the area of ​​the seal corresponding to the installation cavity, and oil is injected into the installation cavity through the opening on the seal.

[0065] The present invention also proposes a motor, which includes a rotor and a stator assembly 100. The specific structure of the stator assembly 100 refers to the above embodiment. Since the motor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0066] The present invention also proposes a car, which includes a body and a motor. The specific structure of the stator assembly refers to the above-mentioned embodiment. Since the car adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0067] The above description is only for the present invention and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stator assembly, characterized in that: include: An iron core ring, with a plurality of mounting grooves formed at the end thereof, the plurality of mounting grooves being arranged at intervals along the circumference of the iron core ring, the iron core ring having an oil injection core segment in the middle, an oil injection flow channel being formed on the oil injection core segment, the oil injection flow channel being connected to the plurality of mounting grooves, the oil injection port of the oil injection flow channel being opened on the side surface of the oil injection core segment, the oil injected from the oil injection port entering the oil injection core segment along the radial direction of the iron core ring, and flowing along the axial direction of the iron core ring after passing through the plurality of mounting grooves; and, The coil winding is at least partially disposed in the plurality of mounting grooves.

2. The stator assembly according to claim 1, characterized in that The core ring comprises two oil guide sections respectively located on both sides of the oil injection core section, the inner side end of the mounting groove of the oil injection core section is closed, the inner diameter of the oil injection core section is smaller than the inner diameter of the oil guide section, and the inner side end of the mounting groove of the oil guide section is open; The stator assembly also includes two closed rings, which are arranged one by one corresponding to the oil guide section, the outer wall of the closed ring and the inner wall of the oil guide section are against each other, and the inner diameter of the closed ring is consistent with the inner diameter of the oil injection core section.

3. The stator assembly as claimed in claim 2, wherein the closed ring comprises magnetic conductive segments spaced apart along the circumferential direction thereof, the inner sides of the magnetic conductive segments are flush with the closed ring, and the outer sides of the magnetic conductive segments are against the oil conductive segments.

4. The stator assembly according to claim 3, characterized in that: The closed ring includes magnetic isolation segments spaced apart along the circumferential direction thereof, the magnetic isolation segments are aligned one by one with the mounting grooves, and the magnetic isolation segments connect two adjacent magnetic conductive segments.

5. The stator assembly according to claim 1, characterized in that A plurality of conducting wires of the coil winding are arranged in sequence in the installation groove along the radial direction of the core ring.

6. The stator assembly according to claim 1, characterized in that The oil injection flow channel includes a connecting groove arranged on the outside of the oil injection core segment, the oil injection holes are arranged one by one corresponding to the mounting grooves, the oil injection port connects the mounting groove and the connecting groove, and the oil collected in the connecting groove is used to be sent to the oil injection port respectively and simultaneously.

7. The stator assembly according to claim 1, characterized in that The core ring includes two oil guide sections respectively located on both sides of the oil injection core section, the outer diameter of the oil injection core section is smaller than the oil guide section, the oil injection flow channel includes a connecting groove formed between the two oil guide sections, the oil injection holes are arranged one by one corresponding to the mounting grooves, the oil injection port connects the mounting groove and the connecting groove, and the oil collected in the connecting groove is used to be sent into the oil injection port at the same time.

8. The stator assembly according to claim 1, characterized in that An insulating member is provided between the portion of the coil winding located in the installation slot and the side wall of the installation slot.

9. A motor, characterized in that: Comprising the stator assembly according to any one of claims 1 to 8.

10. An automobile, characterized in that: Comprising the motor as claimed in claim 9.

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