Winding coil unit, stator winding, stator assembly, motor and vehicle

Abstract

The present disclosure relates to a single winding coil, a stator winding, a stator assembly, an electric motor, and a vehicle. The single winding coil includes an in-slot section and an out-of-slot section connected to each other. The in-slot section is for insertion into a stator slot of a stator core, and the out-of-slot section is for extending outside the stator core. Wherein, a bent section is formed on the out-of-slot section and bends towards the stator core. The bent section can reduce the occupied space of the single winding coil outside the stator core, thereby reducing the overall size of the stator assembly and even the electric motor. When it is applied to an axial flux motor, the bent section formed on the out-of-slot section on the radially inner side of the stator core can make this section close to the radially inner wall of the stator core, so that the in-slot section on the radially inner side can be in a region with a larger circumferential space away from the rotation axis, thereby avoiding interference between circumferentially arranged single winding coils and avoiding an increase in the axial dimension caused by increasing the height in the axial direction to avoid this interference.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular to a winding coil monomer, a stator winding, a stator assembly, a motor and a vehicle. Background Art

[0002] After the distributed stator winding of the motor is inserted into the stator slot of the stator core, both ends of the winding will extend out of the stator core, and the extended part will occupy the space outside the stator core, which will cause the motor to be larger in size, occupy a large space and be inconvenient to arrange. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a winding coil monomer, a stator winding, a stator assembly, a motor and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a winding coil monomer is provided, comprising an in-slot section and an out-slot section connected to each other, the in-slot section being used to be inserted into a stator slot of a stator core, and the out-slot section being used to extend out of the stator core, wherein the out-slot section is formed with a bent section that bends in a direction approaching the stator core.

[0005] Optionally, the stator slot is configured to extend radially on an end surface of the stator core, and the slot outer section is configured to be arranged on a radial side of the stator core.

[0006] Optionally, the winding coil monomer includes a third segment, a second segment, a first segment, a fourth segment and a fifth segment connected in sequence, the third segment, the first segment and the fifth segment are the outside-slot segments, the second segment and the fourth segment are the inside-slot segments, the first segment is connected between the second segment and the fourth segment, the third segment is connected to the end of the second segment away from the first segment, and the fifth segment is connected to the end of the fourth segment away from the first segment.

[0007] Optionally, the third section and the fifth section are located radially outside the stator core and are respectively formed with third-type bending sections, and the third-type bending sections are configured to bend in a direction close to the stator core.

[0008] Optionally, the third section and the fifth section respectively form at least two sections of the third type bending sections, the bending angle of the third type bending section connected to the second section in the third section is the largest, and the bending angle of the third type bending section connected to the fourth section in the fifth section is the largest.

[0009] Optionally, the third section and the fifth section are respectively formed with three third-type bending sections, and the multiple third-type bending sections are connected in sequence and bent in a direction close to the stator core.

[0010] Optionally, the first section is located radially inward of the stator core and is formed with a plurality of bent sections.

[0011] Optionally, the first section is constructed as a symmetrical V-shape, and each side of the V-shape is formed with a plurality of the bending sections.

[0012] Optionally, each side of the V-shape is respectively formed with a second type of bending section and a first type of bending section, the second type of bending section is configured to bend in a direction close to the stator core, and the first type of bending section is configured to bend in a direction away from the stator core.

[0013] Optionally, the number of the second-type bending sections in each side of the V-shape is at least two, and both ends of each side are the second-type bending sections.

[0014] Optionally, each side of the V-shape is formed with two sections of the second-type bending sections and one section of the first-type bending section, and the first-type bending section is connected between the two sections of the second-type bending sections.

[0015] Optionally, the third segment and the fifth segment are located radially outside the stator core, the first segment is located radially inside the stator core, and at least one of the third segment, the first segment and the fifth segment is axially bent relative to the second segment or the fourth segment.

[0016] Optionally, the bending radius corresponding to the bending section is 1.5 to 3 times the width of the coil.

[0017] According to a second aspect of an embodiment of the present disclosure, there is provided a stator winding, comprising a plurality of connected winding coil monomers, wherein the winding coil monomers are the winding coil monomers provided by the present disclosure.

[0018] According to a third aspect of an embodiment of the present disclosure, a stator assembly is provided, including a stator core and a stator winding, wherein the stator core is formed with stator slots, the stator winding is arranged in the stator slots, and the stator winding is the stator winding provided in the present disclosure.

[0019] Optionally, the stator slots are arranged on the end surface of the stator core and extend radially along the stator core, and the slot outer sections are arranged radially outside and radially inside the stator core.

[0020] According to a fourth aspect of an embodiment of the present disclosure, there is provided a motor, comprising a stator assembly and a rotor assembly, wherein the stator assembly is the stator assembly provided by the present disclosure.

[0021] According to a fifth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the motor provided by the present disclosure.

[0022] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: a bent section that bends toward the stator core is formed in the slot outer section of the winding coil monomer, which can reduce the space occupied by the winding coil monomer outside the stator core, thereby reducing the overall size of the stator assembly and even the motor, and facilitating space layout. Moreover, when it is applied to an axial flux motor, the bent section formed on the slot outer section on the radial inner side of the stator core can make the section close to the radial inner wall of the stator core and as far away from the rotation axis of the stator core as possible, so that the slot inner section on the radial inner side can be in a region with a large circumferential space away from the rotation axis, thereby avoiding interference between the circumferentially arranged winding coil monomers, and avoiding the increase in axial size caused by increasing the height in the axial direction to avoid the interference.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] Figure 1 It is a partial schematic diagram of the radial outer side of the stator winding in the prior art when it is arranged in the stator core of the axial flux motor.

[0026] Figure 2 It is a partial schematic diagram of the radial inner side when the stator winding in the prior art is arranged in the stator core of the axial flux motor.

[0027] Figure 3 is a schematic diagram of a stator assembly according to an exemplary embodiment.

[0028] Figure 4 is a schematic plan view of a stator assembly according to an exemplary embodiment.

[0029] Figure 5 yes Figure 4 Schematic diagram of part B in .

[0030] Figure 6 is along Figure 4 Section view taken along the cutting line AA.

[0031] Figure 7 is a schematic plan view of a stator core according to an exemplary embodiment.

[0032] Figure 8 is a schematic plan view of a stator winding according to an exemplary embodiment.

[0033] Fig. 9 It is a schematic plan view of a winding coil monomer according to an exemplary embodiment.

[0034] Fig.10 It is a schematic structural diagram of the third section of a winding coil monomer according to an exemplary embodiment.

[0035] Fig.11 It is a schematic structural diagram of a first section of a winding monomer according to an exemplary embodiment.

[0036] Description of Reference Numerals

[0037] 1-the third section, 2-the second section, 3-the first section, 4-the fourth section, 5-the fifth section, 10-the winding coil monomer, 100-the section inside the slot, 200', 200-the section outside the slot, 300-the bending section, 310-the third type of bending section, 320-the second type of bending section, 330-the first type of bending section, 340-the fourth type of bending section, 1000', 1000-the stator core, 1001-the stator slot, 2000-the stator winding. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying 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. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims. In the present disclosure, unless otherwise indicated, directional words such as "axial, radial" are generally used relative to the central axis of the stator core in the motor provided by the present disclosure.

[0039] The windings of the motor are divided into centralized windings and distributed windings. The centralized windings refer to the windings wound around each stator tooth, and the distributed windings refer to the winding coils dispersedly arranged in the stator slots. Compared with the distributed windings, the centralized windings are wound around a single stator tooth, and the coils are in a fixed position, which is convenient for layout and saves space. Compared with the centralized windings, the distributed windings can have more combinations to arrange the position and connection of the coils, so that a variety of different combinations of pole numbers and slot numbers can be achieved to meet different motor performance requirements. However, after this distributed winding is inserted into the stator slots of the stator core, the two ends of the winding will extend out of the stator core, and the extended part will occupy the space outside the stator core, which will cause the motor to be larger in size, occupy a large space and be inconvenient to arrange. For example, Figure 1 and Figure 2As shown, when such a distributed winding is applied to an axial flux motor, the slot outer section 200' of the stator winding will occupy a large space on the radial inner side and radial outer side of the stator core 1000', such as Figure 1 As shown, the radially outer slot outer section 200' will cause the outer diameter of the motor to be larger, and the radially inner space closer to the rotating shaft will be smaller, which will cause insufficient space for arranging the radially inner slot outer section 200', resulting in Figure 2 The interference between winding coils in the same circumferential layer is shown. If these winding coils are staggered in the axial direction to avoid interference, the axial height of the winding will be increased, which will also increase the size of the motor.

[0040] To this end, the embodiment of the present disclosure provides a stator winding 2000 and a winding coil monomer 10 constituting the stator winding 2000. A plurality of winding coil monomers 10 connected together can form a branch of the stator winding 2000. For a three-phase motor, the same phase can have multiple branches, which can be connected in series to form a single-branch winding, or can be connected in parallel to form a multi-branch winding.

[0041] Combination Figures 3 to 9 The winding coil monomer 10 provided in the embodiment of the present disclosure may include an in-slot section 100 and an out-slot section 200 connected to each other, the in-slot section 100 is used to be inserted into the stator slot 1001 of the stator core 1000, and the out-slot section 200 is used to extend outside the stator core 1000, wherein the out-slot section 200 is formed with a bent section 300 bent in a direction close to the stator core 1000.

[0042] Referring to the accompanying drawings, taking the stator winding 2000 applied to the stator core 1000 of the axial flux motor as an example, the stator core 1000 is uniformly distributed with a plurality of radially arranged stator slots 1001 in the circumferential direction, and the stator slots 1001 are arranged at the end face of the stator core 1000, where the end face refers to the axial face of the stator core 1000. In this embodiment, the slot outer section 200 refers to the part extending from the radial outer side and the radial outer side of the stator core 1000, and bending in the direction close to the stator core 1000 means that the slot outer section 200 on the radial outer side of the stator core 1000 is bent in the direction close to the radial outer wall of the stator core 1000, and the slot outer section 200 on the radial inner side of the stator core 1000 is bent in the direction close to the radial inner wall of the stator core 1000, so that the stator winding 2000 reduces the radial space occupation. The stator winding 2000 of the embodiment of the present disclosure can also be applied to a radial flux motor. The stator core of the radial flux motor has a plurality of axially arranged stator slots evenly distributed circumferentially, and the stator slots are arranged on the radial inner wall of the stator core. In this embodiment, the slot outer section 200 refers to the portion extending from the axial ends of the stator core, and bending in the direction close to the stator core 1000 means that the slot outer sections 200 at both ends are bent in the direction close to the corresponding stator core end faces, so that the stator winding 2000 reduces the axial space occupied. It should be understood that the drawings and text of the embodiment of the present disclosure take the application of axial flux motors as an exemplary but non-restrictive description.

[0043] Through the above technical solution, a bent section 300 that bends toward the stator core 1000 is formed on the slot outer section 200 of the winding coil monomer 10, which can reduce the space occupied by the winding coil monomer 10 outside the stator core 1000, thereby reducing the overall size of the stator assembly and even the motor, and facilitating space layout. In addition, when it is applied to an axial flux motor, the bent section 300 formed on the slot outer section 200 on the radial inner side of the stator core 1000 can make the section close to the radial inner wall of the stator core 1000 and as far away from the rotation axis of the stator core 1000 as possible, so that the slot outer section 200 on the radial inner side can be in an area with a large circumferential space away from the rotation axis, thereby avoiding interference between the circumferentially arranged winding coil monomers 10, and avoiding the increase in axial dimensions caused by increasing the axial height to avoid the interference. Figure 6 As shown, the slot inner segments 100 in the stator slot 1001 are arranged in six layers, the top of the slot outer segment 200 is flush with the top of the slot inner segment 100, and the axial height is not increased.

[0044] like Fig. 9As shown, the winding coil monomer 10 includes a third section 1, a second section 2, a first section 3, a fourth section 4 and a fifth section 5 connected in sequence. The third section 1, the first section 3 and the fifth section 5 are slot-out sections 200. The third section 1 and the fifth section 5 can also be called welding ends, which are used to be welded with other winding coil monomers 10 or busbars (not shown), and the first section 3 can also be called a bending end, which is used to bend the conductor out of the spaced second section 2 and the fourth section 4 to be placed in different stator slots 1001. The third section 1 and the fifth section 5 can be as shown in FIG. Fig. 9 The second section 2 and the fourth section 4 are in-slot sections 100, the first section 3 is connected between the second section 2 and the fourth section 4, the third section 1 is connected to the end of the second section 2 away from the first section 3, and the fifth section 5 is connected to the end of the fourth section 4 away from the first section 3. The third section 1, the first section 3 and the fifth section 5 are all formed with a bending section 300 to Fig. 9 Taking the direction of the drawing as an example, the bending section 300 formed by the third section 1 and the fifth section 5 is bent in a generally downward direction, and the bending section 300 formed by the first section 3 is bent in a generally upward direction.

[0045] When applied to a radial flux motor, the second section 2 and the fourth section 4 can be arranged parallel to each other; when applied to an axial flux motor, the second section 2 and the fourth section 4 can be arranged at an angle, for example, the span between the second section 2 and the fourth section 4 at the bent end can be y-1, and the span between the second section 2 and the fourth section 4 at the welded end can be y+1, where y is the pole pitch, and the pole pitch is the number of stator slots divided by the number of poles. In the embodiment of the present disclosure, the number of slots of the stator slot 1001 of the stator core 1000 is 48 (refer to Figure 7 ), the number of pole pairs is 4 (that is, the number of poles is 8) as an example, the winding coil monomer 10 provided in the embodiment of the present disclosure can also be extended to other scenarios. For example, it can also be applied to the case where the number of poles is 8 and the number of slots is 54, which is common in vehicle drive motors.

[0046] Reference Fig.10 The third section 1 and the fifth section 5 may each be formed with a third type of bending section 310, and the third type of bending section 310 is configured to bend toward a direction close to the stator core 1000. Figure 3 In the embodiment of the axial flux motor, the third segment 1 and the fifth segment 5 may be located radially outside the stator core 1000, and the third type of bent segment 310 may be bent toward the radial outside of the stator core 1000. Figure 5 And reflect Figure 1 After the slot outer section 200 (the third section 1 and the fifth section 5) on the radial outer side of the stator core 1000 of the axial flux motor is bent to form the third type of bending section 310, Figure 5The outer section 200 of the slot is compared to Figure 1 The slot outer section 200 ′ at the corresponding position is closer to the radial outer wall of the stator core 1000 , which reasonably utilizes the radial outer space and effectively reduces the outer diameter of the stator assembly.

[0047] The third section 1 and the fifth section 5 may each be formed with at least two third-type bending sections 310, wherein the bending angle of the third-type bending section 310 connected to the second section 2 in the third section 1 is the largest, and the bending angle of the third-type bending section 310 connected to the fourth section 4 in the fifth section 5 is the largest. The slot-outer section 200 located on the radial outer side of the stator core 1000 is arranged to have the largest bending angle of the third-type bending section 310 connected to the slot-inner section 100, so that the extension direction of the slot-outer section 200 leading out of the slot-inner section 100 can be quickly changed, such as Figure 5 In the embodiment, the radial extension direction of the slot section 100 is first changed to extend roughly in the tangential direction, and then fine-tuned through other third-type bending sections 310, so that the slot section 200 gradually approaches the radial outer wall of the stator core 1000. By providing multiple third-type bending sections 310, multiple adjustments can be made, so that the intervals between the slot sections 200 of each winding coil monomer 10 are maximized, thereby improving space utilization.

[0048] In the disclosed embodiment, the third section 1 and the fifth section 5 may respectively form three third-type bending sections 310, and the multiple third-type bending sections 310 may be connected in sequence and all bend in a direction close to the stator core 1000. Since the length of the winding coil monomer 10 is limited, by providing three third-type bending sections 310, it is possible to meet the requirement of reducing the space occupied on the radial outer side and avoid damaging the enameled wire of the winding coil monomer 10 due to excessive bending angles.

[0049] Reference Fig.11 The first section 3 can be formed into multiple bending sections 300, combined with Figure 3 In the embodiment of the axial flux motor, the first section 3 is located radially inside the stator core 1000. The multi-section bending section 300 can fine-tune the radially inner arrangement position of the first section 3 so that it can maximize the use of the larger space near the inner wall of the stator core 1000.

[0050] In the present disclosure, refer to Fig. 9 and Fig.11 The first section 3 can be constructed as a symmetrical V-shape, and the V-shape can be formed by bending the fourth type of bending section 340. Each side of the V-shape is formed with multiple bending sections 300, so that both sides of the V-shape can be slightly adjusted in direction, so that the space close to the radial inner wall of the stator core 1000 can be fully utilized according to the actual arrangement position during winding.

[0051] Each side of the V-shape may be formed with a second type of bending section 320 and a first type of bending section 330, and the second type of bending section 320 is connected to the first type of bending section 330. The second type of bending section 320 is configured to bend toward the direction close to the stator core 1000 so that it is as close to the radial inner wall of the stator core 1000 as possible, which can reduce the occupied space on the radial inner side on the one hand, and maximize the use of the larger space near the radial inner wall on the other hand, thereby improving space utilization. Figure 1 and Figure 5 , compared to Figure 1 After the second type of bending section 320 is provided, Figure 5 The slot outer section 200 located on the radial inner side of the stator core 1000 is more compact in the area close to the radial inner wall of the stator core 1000, and the loose space there is reasonably utilized. In addition, the first type of bending section 330 is configured to bend in a direction away from the stator core 1000, combined with Figure 5 and Fig.11 After the second type of bending section 320 is bent toward the direction close to the stator core 1000, the number of slots across the winding coil monomer 10 will be reduced. Therefore, the first type of bending section 330 with reverse bending is provided to meet the requirement of sufficient number of slots across.

[0052] In the present disclosure, refer to Fig. 9 and Fig.11 , the number of the second type of bending sections 320 in each side of the V-shape is at least two, and both ends of each side are second type of bending sections 320. When the slot inner section 100 is led out to the radial inner side of the stator core 1000 to connect with the slot outer section 200 on this side, the end of the V-shaped side connected with the slot inner section 100 can be bent toward the inner wall of the stator core 1000 through the second type of bending section 320 to reasonably utilize the larger space near the inner wall; the other end of the V-shaped side opposite to this end (i.e., the end close to the fourth type of bending section 340) needs to pass through the second type of bending section 320 again to obtain the extension direction required for connecting with the other side of the V-shape. A plurality of second-type bending sections 320 may be provided between the second-type bending sections 320 at both ends, so that the intervals between the slot outer sections 200 between each winding coil monomer 10 can be utilized as much as possible through slight adjustments, thereby maximizing the space utilization rate. A plurality of first-type bending sections 330 may also be provided to ensure a sufficient number of slots.

[0053] In the present disclosure, refer to Fig.11Each side of the V-shape may be formed with two second-type bending sections 320 and one first-type bending section 330, and the first-type bending section 330 is connected between the two second-type bending sections 320. Since the size of the slot outer section 200 is limited, the two second-type bending sections 320 and one first-type bending section 330 can meet the requirements of space utilization, span and extension direction, and will not cause crack damage to the enameled wire of the winding coil monomer 10 due to too many bending sections.

[0054] Combination Figure 3 and Figure 6 In the embodiment of the axial flux motor, the third segment 1 and the fifth segment 5 may be located radially outside the stator core 1000, the first segment 3 may be located radially inside the stator core 1000, and at least one of the third segment 1, the first segment 3 and the fifth segment 5 may be axially bent relative to the second segment 2 or the fourth segment 4 to ensure stacking space. Figure 6 In the embodiment, the radially outer and radially inner parts of the winding coil monomers in the bottom layer will bend axially downward to facilitate the stacking of the winding coil monomers in the upper layer. In the sequence from the lower layer to the upper layer, the downward bending angle of the winding coil monomers will gradually decrease until the winding coil monomers in the top layer can be stacked without bending upward, ensuring that the axial height does not exceed the axial height of the stator core 1000.

[0055] In the embodiment of the present disclosure, the bending radius corresponding to the bending section 300 (including the third type of bending section 310 and the second type of bending section 320 described above) may be 1.5 to 3 times the width of the coil. Fig. 9 The dimensions perpendicular to the extension direction in the drawing. The bending radius corresponding to the first type of bending section 330 and the fourth type of bending section 340 described above can be 1.5 to 3 times the width of the coil. Setting the bending radius within this value range can reduce the processing difficulty and avoid crack damage to the enameled wire due to high force at the bending point.

[0056] The stator winding provided in the second aspect of the embodiment of the present disclosure includes a plurality of connected winding coil monomers 10, which can be connected in series or in parallel. The winding coil monomers 10 here are the above-mentioned winding coil monomers, and have all the beneficial effects of the above-mentioned winding coil monomers 10. When the stator winding in the embodiment of the present disclosure is applied to an axial flux motor, the winding coil monomers 10 can be first preformed according to the above structure, and then axially inserted into the stator slot 1001, without the need to first insert and then form the outer slot section 200 (such as the third section 1 and the fifth section 5 above), which reduces the difficulty of forming, simplifies the process, and makes the processing and assembly process simpler.

[0057] According to a third aspect of an embodiment of the present disclosure, a stator assembly is provided, including a stator core 1000 and a stator winding 2000. The stator core 1000 is formed with stator slots 1001. The stator winding 2000 is arranged in the stator slots 1001. The stator winding 2000 is the above-mentioned stator winding and has all the beneficial effects of the above-mentioned stator winding 2000, which will not be repeated here.

[0058] In the axial flux motor, the stator slots 1001 are arranged on the end face of the stator core 1000 and extend radially along the stator core 1000, and the slot outer sections 200 are arranged radially outside and radially inside the stator core 1000. In this application scenario, the stator slots 1001 are radially arranged, rather than being arranged in parallel between the stator slots in the radial flux motor. This radial structure will cause the adjacent winding coil monomers 10 to be divergent rather than parallel, which will result in a lot of loose space between the winding coil monomers 10 that is not utilized. Therefore, the winding coil monomers 10 provided by the embodiment of the present disclosure can effectively improve the space utilization rate of the distributed winding outside the stator core in the axial flux motor, making the structure compact, thereby reducing the size of the motor.

[0059] According to a fourth aspect of an embodiment of the present disclosure, a motor is provided, including a stator assembly and a rotor assembly, wherein the stator assembly is the above-mentioned stator assembly and has all the beneficial effects of the above-mentioned stator assembly, which will not be repeated here.

[0060] According to a fifth aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the above-mentioned motor and having all the beneficial effects of the above-mentioned motor, which will not be described in detail here.

[0061] The word "exemplary" is used herein to indicate serving as an example, instance, or diagram. Any aspect or design described herein as "exemplary" is not necessarily understood to be advantageous compared to other aspects or designs. On the contrary, the use of the word exemplary is intended to present concepts in a concrete manner. As used herein, the term "or" is intended to represent 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 represent any one of the natural inclusive arrangements. That is, if X applies A; X applies B; or X applies both A and B, "X applies A or B" is satisfied under any of the aforementioned examples. In addition, unless otherwise specified or clearly pointed to a singular form from the context, the articles "one" and "an" as used in this application and the appended claims are generally understood to mean "one or more".

[0062] Likewise, 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 after 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. In particular, with respect to the various functions performed by the components (e.g., elements, resources, etc.) described above, unless otherwise indicated, the terms used to describe such components are intended to correspond to any component (functionally equivalent) that performs the specific functions of the described components, even if the structure is not equivalent to the disclosed structure. In addition, although specific features of the present disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations as may be desired and beneficial to any given or specific application. In addition, with respect to "including", "having", "having", "having", or variations thereof used in a specific embodiment or claim, such terms are intended to be inclusive in a manner similar to the term "comprising".

[0063] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0064] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0065] In the above detailed description, reference is made to the accompanying drawings, which illustrate specific aspects of the present disclosure that can be practiced by way of illustration. In this regard, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating directions or representing positional relationships, 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, directional terms can be used for illustrative purposes rather than restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. Therefore, the following detailed description should not be considered in a limiting sense.

[0066] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present disclosures described herein may 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; similarly, "at least one of . . . " includes any one of the related listed items and any combination of any two or more.

[0067] It should be understood that, unless otherwise clearly specified and limited, the terms "joining", "attaching", "installing", "connecting", "connecting", "fixing" and the like 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 an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0068] In addition, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may be used herein to indicate that the component, element or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements or layers are arranged between the surface and the component, element or material layer. However, the term "above" used in relation to a component, element or material layer formed "above" or located "above" a surface may also optionally have a specific meaning: the component, element or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, such as in direct contact with the surface.

[0069] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, component, region, layer or section from another component, component, region, layer or section. Therefore, without departing from the teachings of each example, the first component, component, region, layer or section mentioned in the examples described herein may also be referred to as the second component, component, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first" and "second" may expressly or implicitly include at least one of the features. In the description herein, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0070] It should be understood that spatially relative terms such as "above", "upper", "below", and "lower" are used herein to describe the relationship of one element to another element shown in the figures. In addition to the orientation depicted in the drawings, such spatially relative terms are also intended to include different orientations of the device in use or operation. For example, if the device in the drawings is turned over, the element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Therefore, depending on the spatial orientation of the device, the term "above" includes both upper and lower orientations. The device may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

Claims

1. A winding coil monomer, characterized in that: It comprises an inner slot section and an outer slot section connected to each other, the inner slot section is used to be inserted into the stator slot of the stator core, and the outer slot section is used to extend outside the stator core, wherein the outer slot section is formed with a bent section bent in a direction close to the stator core, and the outer slot section comprises a first section located on the radial inner side of the stator core, the first section is constructed as a symmetrical V-shape, each side of the V-shape is respectively formed with a second type of bent section and a first type of bent section, the second type of bent section is configured to be bent in a direction close to the stator core, and the first type of bent section is configured to be bent in a direction away from the stator core, wherein the number of the second type of bent sections in each side of the V-shape is at least two, and both ends of each side are the second type of bent sections.

2. The winding coil monomer according to claim 1, characterized in that: The stator slot is configured to extend in a radial direction at an end surface of the stator core, and the slot outer section is configured to be arranged at a radial side of the stator core.

3. The winding coil monomer according to claim 1, characterized in that: The winding coil monomer includes a third section, a second section, a first section, a fourth section and a fifth section connected in sequence, the third section, the first section and the fifth section are the outside-slot sections, the second section and the fourth section are the inside-slot sections, the first section is connected between the second section and the fourth section, the third section is connected to an end of the second section away from the first section, and the fifth section is connected to an end of the fourth section away from the first section.

4. The winding coil monomer according to claim 3, characterized in that: The third section and the fifth section are located radially outside the stator core and are respectively formed with third-type bending sections, and the third-type bending sections are configured to bend in a direction approaching the stator core.

5. The winding coil monomer according to claim 4, characterized in that: The third section and the fifth section respectively form at least two sections of the third type bending sections, the bending angle of the third type bending section connected to the second section in the third section is the largest, and the bending angle of the third type bending section connected to the fourth section in the fifth section is the largest.

6. The winding coil monomer according to claim 5, characterized in that: The third section and the fifth section are respectively formed with three third-type bending sections, and the plurality of third-type bending sections are sequentially connected and bent toward a direction approaching the stator core.

7. The winding coil monomer according to claim 1, characterized in that: Each side of the V-shape is respectively formed with two sections of the second-type bending sections and one section of the first-type bending section, and the first-type bending section is connected between the two sections of the second-type bending sections.

8. The winding coil monomer according to claim 3, characterized in that: The third segment and the fifth segment are located radially outside the stator core, and at least one of the third segment, the first segment, and the fifth segment is axially bent relative to the second segment or the fourth segment.

9. The winding coil monomer according to claim 1, characterized in that: The bending radius corresponding to the bending section is 1.5 to 3 times the width of the coil.

10. A stator winding, characterized in that: The invention comprises a plurality of connected winding coil monomers, wherein the winding coil monomers are the winding coil monomers according to any one of claims 1 to 9.

11. A stator assembly, characterized in that: It comprises a stator core and a stator winding, wherein the stator core is formed with stator slots, the stator winding is arranged in the stator slots, and the stator winding is the stator winding according to claim 10.

12. The stator assembly according to claim 11, characterized in that: The stator slots are arranged on the end surface of the stator core and extend in the radial direction of the stator core, and the slot outer sections are arranged on the radial outer side and the radial inner side of the stator core.

13. A motor, characterized in that: It comprises a stator assembly and a rotor assembly, wherein the stator assembly is the stator assembly according to claim 11 or 12.

14. A vehicle, characterized in that: Comprising an electric machine according to claim 13.

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