Stator core, driving motor and vehicle

Abstract

The utility model relates to a stator core, a driving motor and a vehicle, the stator core (11) is provided with a groove (111) and a slotted hole (112), the groove (111) is used for accommodating a stator winding (12) and is arranged on a first end face of the stator core (11), and the slotted hole (112) is arranged on the peripheral wall of the stator core (11) and is located between a second end face of the stator core (11) and the groove (111). In the stator core provided by the invention, on one hand, the slotted holes can reduce the weight of the whole stator core and reduce the iron loss so as to improve the efficiency of the motor, and on the other hand, the slotted holes can be used as cooling channels to guide the cooling medium of the outer ring to the inner ring of the stator core so as to realize the cooling of the stator core and improve the cooling effect.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and particularly to a stator core, a drive motor, and a vehicle. Background Art

[0002] Axial flux motors, also known as disc motors, have received increasing attention in the motor industry due to their advantages such as compact axial dimensions, high electromechanical conversion efficiency, large power and torque density, etc. In related technologies, the stator part of axial flux motors usually adopts an overall oil immersion cooling method, and the cooling effect is not good. Summary of the Utility Model

[0003] To overcome the problems existing in the related technologies, the present disclosure provides a stator core, a drive motor, and a vehicle.

[0004] According to the first aspect of the embodiments of the present disclosure, a stator core is provided. Grooves and slot holes are provided on the stator core. The grooves are used to accommodate stator windings and are provided on the first end face of the stator core. The slot holes are provided on the outer peripheral wall of the stator core and are located between the second end face of the stator core and the grooves.

[0005] Optionally, the first end face and the second end face of the stator core are respectively provided with the grooves, and the slot holes are located between the grooves at both ends and are on the same straight line as the grooves.

[0006] Optionally, the grooves and the slot holes are respectively a plurality of arranged at intervals along the circumferential direction of the stator core. The stator core has two rows of the grooves arranged along the axial direction and at least one row of the slot holes located between the two rows of the grooves.

[0007] Optionally, the slot holes are at least one of a circular hole, a square hole, and a rectangular hole.

[0008] Optionally, the slot holes include a first opening for the cooling medium to pass through and a second opening for the fixing member to pass through.

[0009] Optionally, the first openings and the second openings are respectively a plurality of arranged at intervals along the circumferential direction, and at least one first opening is provided between two adjacent second openings.

[0010] Optionally, the width of the second opening in the circumferential direction is greater than the width of the first opening in the circumferential direction.

[0011] Optionally, the grooves and / or the slot holes extend radially and penetrate from the outer peripheral wall of the stator core to the inner peripheral wall of the stator core.

[0012] According to the second aspect of the embodiments of the present disclosure, a drive motor is provided, including the above-mentioned stator core.

[0013] According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, including the above-mentioned drive motor.

[0014] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: In the stator core provided by the present disclosure, on the one hand, the slot holes can reduce the weight of the entire stator core and reduce iron loss, thereby improving the efficiency of the motor. On the other hand, the slot holes can serve as cooling channels to guide the cooling medium on the outer ring to the inner ring of the stator core, thereby realizing the cooling of the stator core and improving the cooling effect.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure and used together with the specification to explain the principles of the present disclosure.

[0017] Figures 1 to 4 is a schematic structural diagram of a stator core provided by related embodiments of the present disclosure.

[0018] Figures 5 to 13 is a schematic structural diagram of stator cores provided by different exemplary embodiments.

[0019] Figure 14 is a cross-sectional view of a stator core provided according to an exemplary embodiment.

[0020] Figure 15 is a schematic structural diagram of a stator assembly shown according to an exemplary embodiment.

[0021] Figure 16 is an exploded view of a stator assembly shown according to an exemplary embodiment.

[0022] Figure 17 and Figure 18 is an assembly schematic diagram of a stator core in a stator assembly shown according to an exemplary embodiment.

[0023] Figure 19 is Figure 17 a partial enlarged view of part A in

[0024] Figure 20 is a cross-sectional view of a stator assembly provided according to an exemplary embodiment.

[0025] Figure 21 is a schematic diagram of the coolant flow path of a stator assembly provided according to an exemplary embodiment.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS

[0027] 10 - housing; 101 - liquid inlet; 102 - liquid outlet; 103 - first chamber; 104 - second chamber; 105 - counterbore; 11' - existing stator core; 11 - stator core; 111' - groove of existing stator core; 111 - groove; 112 - slot hole; 1121 - first opening; 1122 - second opening; 12 - stator winding; 13 - fixing member; 14 - inner ring fixing ring; 141 - flanging portion; 142 - communication hole; 15 - cover plate. Detailed implementation

[0028] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0029] It should be noted that all actions of obtaining signals, information, or data in the present disclosure are carried out on the premise of complying with the corresponding data protection regulations and policies of the country where the location is located and obtaining the authorization given by the owner of the corresponding device.

[0030] In the related embodiments of the present disclosure, as Figures 1 to 4 , the existing stator cores 11' of single - row slot type and the existing stator cores 11' of double - row slot type are respectively provided. The grooves 111' of the existing stator cores are used to accommodate the stator windings (not shown in the figure), and the overall oil - immersion cooling method is adopted. For Figure 1 the part between the end face of the existing stator core 11' and the groove 111' of the existing stator core in Figure 2 the part between the grooves 111' of the existing stator cores on both sides of the existing stator core 11' in

[0031] the coolant cannot reach, and the cooling effect is poor.

[0032] To solve the above two problems, the present disclosure has made relevant designs in aspects such as the stator core 11, the stator assembly, the punching and coiling equipment for processing the stator core 11, and the processing method of the stator core 11. The following will be introduced in detail with specific embodiments.

[0033] According to the first aspect of the present disclosure, as Figures 5 to 13 shown, a stator core 11 is provided. The stator core 11 is provided with a groove 111 and a slot hole 112. The groove 111 is used to accommodate the stator winding 12 and is provided on the first end face of the stator core 11. The slot hole 112 is provided on the outer peripheral wall of the stator core 11 and is located between the second end face of the stator core 11 and the groove 111.

[0034] In the stator core provided by the present disclosure, on the one hand, the slot hole 112 can reduce the weight of the entire stator core 11 and reduce iron loss, thereby improving the efficiency of the motor. On the other hand, the slot hole 112 can serve as a cooling channel to guide the cooling medium on the outer ring to the inner ring of the stator core 11, thereby realizing the cooling of the stator core 11 and improving the cooling effect. The cooling medium here can be a coolant, such as cooling oil, or it can also be a cooling gas. The slot hole 112 can also be used for a fixing member 13 mentioned below to pass through the stator core 11 to fix the stator core 11, realizing the bidirectional fixation of the stator core 11, solving the problem of reverse crosstalk, and not affecting the installation of the stator winding 12, ensuring the slot fill factor of the stator winding 12.

[0035] The present disclosure includes an embodiment in which a slot hole 112 is added to a single row of grooves 111, and also includes an embodiment in which a slot hole 112 is added to a double row of grooves 111. Taking the latter as an example, as Figures 5 to 13 shown, grooves 111 are respectively provided on the stator core 11 near both end faces. The slot hole 112 is located between the grooves 111 on both sides and is on the same straight line as the grooves 111. Axially, the row where the slot hole 112 is located can be in the middle position of the stator core 11, and the two rows of grooves 111 on both sides are symmetrically arranged with respect to the middle slot hole 112. Circumferentially, the slot hole 112 and the grooves 111 are on the same straight line, and the three are formed simultaneously at one time. Specifically, it will be introduced in detail in combination with the punching and coiling equipment described below.

[0036] In the above embodiments, the grooves 111 and the slots 112 may each be a plurality of circumferentially spaced along the stator core 11. The stator core 11 has two rows of grooves 111 arranged axially and at least one row of slots 112 located between the two rows of grooves 111. Along the axial direction of the stator core 11, at least three rows of groove structures are provided. Regarding the number of rows of the middle slots 112, the present disclosure does not limit, and it may be one row or multiple rows. Regarding the use of the slots 112, the slots 112 may all be used for cooling, may be partially used for cooling and partially used for fixing the stator core 11. Of course, the slots 112 may also be provided only for the fixing member 13 to pass through, which all fall within the protection scope of the present disclosure.

[0037] As shown in Figure 5 , Figure 8 and Figure 11 , the slot 112 may be at least one of a circular hole, a square hole, and a rectangular hole, and may all be circular holes or square holes, or may be a combination of any two or more holes. In other embodiments, the slot 112 may also be a long hole, an oval hole, a special-shaped hole, etc.

[0038] As shown in Figure 11 , the slot 112 includes a first opening 1121 for the cooling medium to pass through and a second opening 1122 for the fixing member 13 to pass through. The coolant on the outer circle of the stator core 11 can flow into the inner circle of the stator core 11 through the first opening 1121, which can improve the cooling effect on the stator core 11. The fixing member 13 can pass through the second opening 1122 radially to fix the stator core 11, and the details will be introduced in detail below.

[0039] In the present disclosure, the first openings 1121 and the second openings 1122 may each be a plurality of circumferentially spaced, and the first openings 1121 and the second openings 1122 may be arranged alternately, and at least one first opening 1121 is provided between two adjacent second openings 1122. As shown in Figure 11 , seven first openings 1121 may be provided between two second openings 1122, and the specific design can be carried out according to needs.

[0040] As shown in Figure 14 , the width of the second opening 1122 in the circumferential direction is greater than the width of the first opening 1121 in the circumferential direction, and the size of the second opening 1122 can be designed according to the shape and size of the fixing member 13.

[0041] In the above embodiments, the grooves 111 and / or the slots 112 extend along the radial direction respectively, and penetrate from the outer peripheral wall of the stator core 11 to the inner peripheral wall of the stator core 11. The groove 111 can be used for the installation of the stator winding 12. The stator winding 12 can be wound in the groove 111 in a certain direction. After the stator winding 12 is energized, a magnetic field in the axial direction can be generated for an axial flux motor. The slot 112 is used as a cooling channel of the stator core 11 to allow the outer coolant to flow to the inner circle, ensuring the cooling effect of the stator core 11.

[0042] According to the second aspect of the present disclosure, as Figures 15 to 17 shown, a stator assembly is provided. The stator assembly includes a housing 10, a stator core 11 and a stator winding 12 disposed in the housing 10. The housing 10 is provided with a liquid inlet 101 and a liquid outlet 102. A first chamber 103 is formed between the outer peripheral wall of the stator core 11 and the inner wall of the housing 10. A second chamber 104 is formed inside the inner peripheral wall of the stator core 11. The stator core 11 has slots 112 arranged in the radial direction. Among them, the liquid inlet 101, the liquid outlet 102 are communicated with the first chamber 103, and the first chamber 103 and the second chamber 104 are communicated through the slots 112. In this embodiment, the stator core 11 can be the stator core introduced above, or can be a separately designed stator core. Specifically, the former will be taken as an example to introduce in detail how to fix the stator core 11 and improve the stator cooling effect. The first chamber 103 and the second chamber 104 are coaxially arranged and separated by the stator core 11. The first opening 1121 of the stator core 11 is the slot 112 that communicates the first chamber 103 and the second chamber 104 mentioned in this embodiment, and the second opening 1122 is the slot 112 for the fixing member 13 to pass through. The manner of fixing the stator core 11 in the housing 10 is not limited. The liquid inlet 101 and the liquid outlet 102 can be arranged opposite to each other in the same radial direction. Of course, they can also be arranged on the same side of the housing 10 or at any position in the circumferential direction, which all belong to the protection scope of the present disclosure.

[0043] In the stator assembly provided by the present disclosure, the coolant flowing in from the liquid inlet 101 enters the first chamber 103. At this time, the temperature of the coolant is relatively low. Part of the coolant in the first chamber 103 flows along the outer circle under the action of gravity, and converges and flows out at the liquid outlet 102, which can cool and lubricate the outer stator core 11 and the stator winding 12. Another part of the coolant in the first chamber 103 flows into the second chamber 104 through the slots 112, cools the inner stator core 11 and the stator winding 12, and flows out of the lower slots 112 to the first chamber 103, converges at the liquid outlet 102 and flows out, forming an entire cooling circuit, improving the heat dissipation effect on the stator core 11 and the stator winding 12.

[0044] To stably fix the stator core 11 within the housing 10, as Figure 17 and Figure 18 shown, the stator assembly includes a fixing member 13 and an inner ring fixing ring 14. The inner ring fixing ring 14 is fixedly installed inside the stator core 11. The fixing member 13 passes through the slot holes 112 of the stator core 11. One end of the fixing member 13 is fixed to the inner wall of the housing 10, and the other end is fixed to the inner ring fixing ring 14. The inner ring fixing ring 14 can be fixed in the inner ring of the stator core 11 by an interference fit. The fixing member 13 can be a spoke that can pass through the slot holes 112. The outer side is fixed to the inner wall of the housing 10 by bolts, and the inner side is fixed to the inner ring fixing ring 14 by rivets, enabling two-way integral fixation of the stator core 11, the housing 10, and the inner ring fixing ring 14 in the axial direction, enhancing the overall strength and stability of the stator assembly structure, and thus improving the reliability of the motor.

[0045] As Figure 17 and Figure 18 shown, the inner ring fixing ring 14 has a body portion and a flanging portion 141 provided on the outer periphery of the body portion. The flanging portion 141 is fixedly connected to the inner peripheral wall of the stator core 11. The body portion divides the second chamber 104 into a first side chamber and a second side chamber. At least one of the first side chamber and the second side chamber is in communication with the slot holes 112. The flanging portion 141 is provided with a communication hole 142 that communicates the first side chamber and the second side chamber. In this embodiment, the flanging portions 141 are multiple and arranged at intervals in the circumferential direction. The multiple flanging portions 141 are in interference fit with the inner peripheral wall of the stator core 11. A communication hole 142 that communicates the first side chamber and the second side chamber is formed between two adjacent flanging portions 141. By adjusting the axial position of the inner ring fixing ring 14 inside the stator core 11 relative to the row where the slot holes 112 are located, it is possible to achieve communication between the first side chamber and the slot holes 112, and the second side chamber is in communication with the first side chamber through the communication hole 142. It is also possible to achieve communication between both the first side chamber and the second side chamber and the slot holes 112. Part of the coolant in the first chamber 103 can enter the first side chamber and the second side chamber through the slot holes 112 to cool the stator core 11 and the stator winding 12 of the inner ring.

[0046] In the present disclosure, as Figure 18 shown, the fixing member 13 has a first end fixed to the housing 10 and a second end fixed to the inner ring fixing ring 14. The size of the first end of the fixing member 13 is larger than that of the second end, which is more convenient for the fixing member 13 to be inserted into the stator core 11 from the outside. Additionally, considering the spaced arrangement between the housing 10 and the stator core 11, and the interference fit between the stator core 11 and the inner ring fixing ring 14, compared with the second end, the connection strength of the first end needs to be enhanced more. Therefore, the size of the first end is designed to be larger to enhance the connection strength of the first end.

[0047] In this embodiment, there may be a plurality of fixing members 13 arranged at intervals in the circumferential direction. For example, Figure 19 As shown, six fixing members 13 are arranged in the circumferential direction, and the stator core 11 can be stably fixed in the housing 10. A counterbore 105 is provided on the inner wall of the housing 10. The first end of the fixing member 13 is lapped on the counterbore 105 and fixed by a fastener. The counterbore 105 can limit the outer end of the fixing member 13 to prevent deflection in the circumferential direction.

[0048] Furthermore, in order to install the stator winding 12 on the stator core 11, grooves 111 for accommodating the stator winding 12 are respectively provided on both end faces of the stator core 11. The grooves 111 are arranged radially and communicate with the first chamber 103 and the second chamber 104. Both ends of the grooves 111 respectively extend to the two end faces of the stator core 11. Part of the coolant in the first chamber 103 can also enter the grooves 111 to cool and lubricate the stator winding 12, and the coolant passing through the grooves 111 can enter the second chamber 104 to cool the inner ring of the stator core 11.

[0049] For example, Figure 16 As shown, to ensure the overall sealing performance, the stator assembly further includes cover plates 15 for closing the openings at both ends of the housing 10. An annular support platform is provided on the inner peripheral wall of the housing 10. The cover plates 15 on both sides can be fixed on the annular support platform by fasteners, which can further reduce the axial dimension of the motor and reduce the occupied space.

[0050] According to the third aspect of the present disclosure, a driving motor is provided, including the stator core or the stator assembly introduced above. This driving motor can be an axial-flux motor, such as a dual-rotor single-stator (RSR) motor, which can not only ensure the fixing effect of the stator core but also ensure the cooling effect on the stator core and the stator winding. This driving motor has all the beneficial effects of the stator core and the stator assembly introduced above, and will not be elaborated here too much.

[0051] In the driving motor provided by the present disclosure, by adding a row of circular or square slots 112 at the middle position of the stator core 11 and adopting a three-row slot structure design in the axial direction, the weight of the stator core 11 can be reduced, the iron loss can be reduced, and the efficiency of the motor can be improved. The added slots 112 can be used as cooling channels to allow the coolant in the outer ring to flow into the inner ring of the stator core 11 to cool the inner-ring stator core 11 and the stator winding 12, improving the cooling efficiency. The added slots 112 can also be used as fixing holes for the fixing members 13 to pass through. The outer end of the fixing member 13 is fixed on the inner wall of the housing 10, and the inner end is fixed on the inner-ring fixing ring 14, which can achieve the two-way fixation of the stator core 11, the housing 10, and the inner-ring fixing ring 14, improving the reliability of this driving motor.

[0052] According to a fourth aspect of the present disclosure, a vehicle is provided, including the drive motor provided by the present disclosure. This vehicle has all the beneficial effects of the stator assembly and the drive motor introduced above, and will not be repeated here.

[0053] In addition, the word "exemplary" is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as "exemplary" is not necessarily to be understood as advantageous as compared to other aspects or designs. Instead, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X applies A or B" is intended to mean any of the natural inclusive permutations. That is, if X applies A; X applies B; or X applies both A and B, then "X applies A or B" is satisfied in any of the foregoing instances. Additionally, unless otherwise specified or clear from the context indicating a singular form, the articles "a" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0054] Similarly, although the present disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. The present disclosure includes all such modifications and variations and is limited only by the scope of the claims. Specifically with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if not structurally equivalent to the disclosed structure. Additionally, although a particular feature of the present disclosure may have been disclosed with respect to only one of several implementations, such a feature may be combined with one or more other features of other implementations as may be desired and advantageous for any given or particular application. Further, with respect to the terms "comprising", "possessing", "having", "include", or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term "including".

[0055] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0056] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

[0057] In the above detailed description, reference is made to the accompanying drawings, in which specific aspects in which the present disclosure can be practiced are shown by way of illustration. In this regard, terms indicating directions or expressing positional relationships such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. can be used with reference to the orientation of the described figures. Since the components of the described device can be positioned in a plurality of different orientations, the directional terms can be used for illustrative purposes and are not restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of the present disclosure. Therefore, the following detailed description should not be taken in a limiting sense.

[0058] It should be understood that unless otherwise specifically stated, the features of some embodiments of the various present disclosures described herein can be combined with each other. As used herein, the term "and / or" includes any one of the related listed items and any combination of any two or more of them; similarly, "at least one of... " includes any one of the related listed items and any combination of any two or more of them.

[0059] It should be understood that unless otherwise clearly defined and limited, the terms "engage", "attach", "mount", "connect", "couple", "fix", etc. used in the embodiments of the present disclosure should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this document can be understood according to specific circumstances.

[0060] In addition, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can be used to mean that the component, element, or layer of material is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or layer of material. However, the term "above" as used herein with respect to a component, element, or layer of material formed "above" or located "above" a surface can also optionally have a specific meaning: the component, element, or layer of material is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0061] Although terms such as "first", "second", and "third" may be used herein to describe various components, elements, regions, layers, or sections, these components, elements, regions, layers, or sections are not limited to these terms. Rather, these terms are only used to distinguish one component, element, region, layer, or section from another. Thus, the first component, element, region, layer, or section mentioned in the examples described herein could also be termed the second component, element, region, layer, or section without departing from the teachings of the respective examples. Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description herein, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and explicitly defined.

[0062] It should be understood that spatial relative terms, such as "above", "upper", "below", and "lower", are used herein to describe the relationship of one element shown in the figures to another element. In addition to the orientation depicted in the figures, such spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as "above" or "upper" relative to another element will then be "below" or "lower" relative to that other element. Thus, depending on the spatial orientation of the device, the term "above" encompasses both the above and below orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

Claims

1. A stator core, characterized in that: The stator core is provided with a groove and a slot hole, wherein the groove is used to accommodate the stator winding and is arranged on the first end surface of the stator core, and the slot hole is arranged on the outer peripheral wall of the stator core and is located between the second end surface of the stator core and the groove.

2. The stator core according to claim 1, characterized in that: The grooves are respectively provided on the first end surface and the second end surface of the stator core, and the slot hole is located between the grooves at both ends and on the same straight line as the grooves.

3. The stator core according to claim 2, characterized in that: The grooves and the slot holes are respectively arranged in a plurality along the circumferential direction of the stator core at intervals. The stator core has two rows of grooves arranged in the axial direction and at least one row of slot holes located between the two rows of grooves.

4. The stator core according to claim 3, characterized in that: The slot hole is at least one of a circular hole, a square hole, and a rectangular hole.

5. The stator core according to claim 1, characterized in that: The slot hole includes a first opening for a cooling medium to pass through and a second opening for a fixing member to pass through.

6. The stator core according to claim 5, characterized in that: The first openings and the second openings are respectively arranged in a plurality and spaced apart along the circumferential direction, and at least one first opening is provided between two adjacent second openings.

7. The stator core according to claim 5, characterized in that: The width of the second opening in the circumferential direction is greater than the width of the first opening in the circumferential direction.

8. The stator core according to any one of claims 1 to 7, characterized in that: The groove and / or the slot hole extends in a radial direction and penetrates from an outer peripheral wall of the stator core to an inner peripheral wall of the stator core.

9. A driving motor, characterized in that: The invention comprises the stator core according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Includes the drive motor as described in claim 9.

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