Stator, motor, power assembly and vehicle

Abstract

The invention relates to a stator, a motor, a power assembly and a vehicle. The stator comprises an air cooling heat dissipation structure, a plurality of stator components and a heat conduction component. The plurality of stator components are distributed around the air cooling heat dissipation structure. At least part of the heat conduction component is arranged between the adjacent stator components and is configured to export heat generated by the stator components, and the exported heat is dissipated through the air cooling heat dissipation part. Through the arrangement, heat generated by the stator components is conducted out through the heat conduction components, and at least part of the heat is dissipated into the air through the air cooling heat dissipation structures, that is, the heat generated by the stator components is dissipated through air cooling on the inner sides of the stator components. Moreover, compared with the design of cooling flow channels on the inner sides of a plurality of stator components, the manufacturing difficulty of the stator is increased, the design of the air cooling heat dissipation structure can simplify the structure of the stator, and the problem that the loss of the motor is increased due to the fact that cooling fluid in the cooling flow channels leaks to air gaps can be avoided.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator, a motor, a powertrain and a vehicle. Background Art

[0002] During the operation of the axial flux motor, the stator and other components will generate heat. In order to ensure the stability of the axial flux motor, the axial flux motor needs to be cooled. At present, in the prior art, a cooling assembly is introduced inside the axial flux motor to cool its internal components, which makes the structure of the axial flux motor complicated. Summary of the invention

[0003] The embodiments of the present application provide a stator, a motor, a powertrain and a vehicle, which simplify the structure of the stator to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above object, according to a first aspect of the present application, a stator is provided, comprising:

[0005] Air-cooled heat dissipation structure;

[0006] A plurality of stator components are distributed around the air-cooling heat dissipation structure; and

[0007] A heat-conducting component, at least a portion of which is disposed between adjacent stator components and configured to conduct heat generated by the stator components, wherein the conducted heat is dissipated via the air-cooling heat dissipation portion.

[0008] Optionally, the stator further includes an internal heat-conducting structure, which is connected to the air-cooled heat dissipation structure, and a plurality of stator components are arranged around the internal heat-conducting structure, and the heat-conducting components at least conduct heat generated by the stator components to the internal heat-conducting structure.

[0009] Optionally, the heat-conducting component includes a connecting heat-conducting sheet and a first heat-conducting sheet, the connecting heat-conducting sheet extends in a radial direction of the stator and is arranged between adjacent stator components, and the first heat-conducting sheet is connected to the connecting heat-conducting sheet and contacts the internal heat-conducting structure.

[0010] Optionally, the first heat conducting sheet is bent relative to the connecting heat conducting sheet and is arranged between the inner heat conducting structure and the stator component.

[0011] Optionally, an inner fitting plane is provided on a surface of the inner heat-conducting structure close to the stator component, and the first heat-conducting sheet has a first fitting plane, which is attached to the inner fitting plane.

[0012] Optionally, the air-cooled heat dissipation structure includes a plurality of heat dissipation fins, and the plurality of heat dissipation fins are arranged on a surface of the inner heat conductive structure facing away from the stator component.

[0013] Optionally, the stator further comprises: an external heat-conducting structure, which is arranged around the plurality of stator components, and the heat-conducting components are further configured to conduct heat generated by the stator components to the external heat-conducting structure.

[0014] Optionally, the heat-conducting component includes a connecting heat-conducting plate and a second heat-conducting plate, the connecting heat-conducting plate extends in a radial direction of the stator and is arranged between adjacent stator components, and the second heat-conducting plate is connected to the connecting heat-conducting plate and contacts the external heat-conducting structure.

[0015] Optionally, the second heat conducting sheet is bent relative to the connecting heat conducting sheet and is arranged between the external heat conducting structure and the stator component.

[0016] Optionally, an outer bonding plane is provided on a surface of the outer heat-conducting structure close to the stator component, and the second heat-conducting sheet has a second bonding plane, and the second bonding plane is bonded on the outer bonding plane.

[0017] Optionally, a flow channel for accommodating a cooling fluid is provided inside the external heat-conducting structure.

[0018] Optionally, the external heat-conducting structure further includes a liquid inlet and a liquid outlet, and the flow channel is arranged between the liquid inlet and the liquid outlet.

[0019] Optionally, the flow channel includes at least two branch flow channels connected in parallel; and / or, the flow channel includes at least two branch flow channels connected in series.

[0020] Optionally, the flow channel includes a circuitous flow channel.

[0021] Optionally, the stator component includes a tooth portion and a coil, and the stator also includes an insulating sheath, the insulating sheath is sleeved on the side wall of the tooth portion, the coil is arranged around the side wall of the tooth portion, and the insulating sheath is arranged between the tooth portion and the coil; at least a portion of the heat-conducting component is arranged between adjacent coils.

[0022] Optionally, the stator further includes a heat-conductive filling material, and at least a portion of the heat-conductive filling material is filled in a gap between the stator component and the heat-conductive component.

[0023] According to a second aspect of the present application, there is also provided a motor, comprising the above-mentioned stator.

[0024] According to a third aspect of the present application, a powertrain is also provided, the powertrain comprising the above-mentioned motor.

[0025] According to a fourth aspect of the present application, a vehicle is also provided, the vehicle comprising the above-mentioned power assembly.

[0026] In the stators, motors, powertrains, and vehicles of some embodiments of the present application, the heat generated by the stator components is conducted out through the heat-conducting components, and at least part of the heat is dissipated into the air through the air-cooling heat dissipation structure, that is, the heat generated by the stator components is dissipated through air cooling on the inner side of the multiple stator components. Moreover, compared with designing cooling channels on the inner side of the multiple stator components, which increases the difficulty of stator manufacturing, the design of the air-cooling heat dissipation structure can simplify the structure of the stator and avoid the problem of increased motor loss caused by the cooling fluid in the cooling channel leaking into the air gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0028] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same figure numbers represent the same parts in the following description.

[0029] Figure 1 A schematic diagram of the three-dimensional structure of the stator of some embodiments provided in this application;

[0030] Figure 2 A schematic diagram of the planar structure of the stator of some embodiments provided in this application;

[0031] Figure 3 A schematic diagram of the cross-sectional structure of a stator of some embodiments provided in this application;

[0032] Figure 4 for Figure 3 A local enlarged schematic diagram of the middle A;

[0033] Figure 5 A schematic diagram of a partial three-dimensional structure of a stator of some embodiments provided in the present application;

[0034] Figure 6 A schematic plan view of the heat-conducting component of a stator of some embodiments provided in the present application;

[0035] Figure 7 A schematic plan view of the heat-conducting components of stators of other embodiments provided in the present application;

[0036] Figure 8 A schematic diagram of the three-dimensional structure of a stator core of a stator in some embodiments provided in the present application;

[0037] Fig. 9A schematic diagram of the three-dimensional structure of an insulating sheath of a stator in some embodiments provided in the present application;

[0038] Fig.10 A schematic diagram of a three-dimensional structure in which an insulating sheath, a heat-conducting member and a coil are installed on a stator core in some embodiments provided in the present application;

[0039] Fig.11 A schematic diagram of the structure of the flow channel of the external heat conduction structure of some embodiments provided in the present application;

[0040] Fig.12 A schematic diagram of the structure of the flow channel of the external heat conduction structure of some other embodiments provided in the present application;

[0041] Fig.13 A schematic diagram of the structure of the flow channel of the external heat conduction structure of some other embodiments provided in the present application;

[0042] Fig.14 A schematic diagram of the structure of the flow channel of the external heat conduction structure of some other embodiments provided in the present application;

[0043] Fig.15 A schematic diagram of the structure of the flow channel of the external heat conduction structure of some other embodiments provided in the present application;

[0044] Fig.16 A schematic diagram of the structure of a motor in some embodiments provided in this application;

[0045] Fig.17 A schematic diagram of the structure of a powertrain of some embodiments provided in this application;

[0046] Fig.18 A structural block diagram of a vehicle according to some embodiments of the present application.

[0047] Description of reference numerals:

[0048] 1. stator; 1A, center axis;

[0049] 11. Internal heat conduction structure; 11A. Internal bonding plane; 111. Air cooling heat dissipation structure; 1111. Heat dissipation fins;

[0050] 12. stator component; 121. tooth portion; 122. coil; 123. yoke portion; 124. stator core;

[0051] 13, heat-conducting member; 131, connecting heat-conducting sheet; 132, first heat-conducting sheet; 132A, first bonding plane; 133, second heat-conducting sheet; 133A, second bonding plane;

[0052] 14. External heat conduction structure; 14A. External bonding plane; 14B. Liquid inlet; 14C. Liquid outlet;

[0053] 141, flow channel;

[0054] 1411, single flow channel;

[0055] 1412, tributary;

[0056] 1413, circuitous flow path;

[0057] 15. Thermally conductive filling material;

[0058] 16. Insulation sheath;

[0059] 171, liquid inlet pipe; 172, liquid outlet pipe;

[0060] 21. first rotor; 22. second rotor;

[0061] 100. Motor; 200. Powertrain; 300. Vehicle. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0063] According to the first aspect of the present application, referring to Figures 1 to 15 As shown, the present embodiment provides a stator 1. Figures 1 to 4 As shown, the stator 1 is annular and has a central axis 1A, which extends along the axial direction of the stator 1. The stator 1 includes an air-cooling heat dissipation structure 111, a plurality of stator components 12 and a heat-conducting component 13.

[0064] A plurality of stator components 12 are distributed around the air-cooling heat dissipation structure 111. At least a portion of the heat-conducting component 13 is disposed between adjacent stator components 12, and is configured to extract the heat generated by the stator component 12, and at least a portion of the extracted heat is dissipated through the air-cooling heat dissipation portion 111. In this arrangement, the heat generated by the stator component 12 is extracted through the heat-conducting component 13, and at least a portion of the heat is dissipated into the air through the air-cooling heat dissipation structure 111, that is, the heat generated by the stator component 12 is dissipated through air cooling on the inner side of the plurality of stator components 12. Moreover, compared to designing cooling channels on the inner side of the plurality of stator components 12, which increases the difficulty of manufacturing the stator, the design of the air-cooling heat dissipation structure 111 can simplify the structure of the stator 1, and can also avoid the problem of increased motor losses caused by the cooling fluid in the cooling channel leaking into the air gap.

[0065] In the related art, a liquid cooling assembly is usually provided on the inner side of the stator to dissipate the heat on the inner side of the stator. However, in order to prevent the cooling fluid of the liquid cooling assembly from leaking into the air gap and causing increased motor losses, the liquid cooling assembly needs to be sealed, and the additional sealing structure will increase the difficulty of manufacturing the motor. Moreover, the use of a cover plate to seal the liquid cooling assembly will increase the air gap of the motor, resulting in a significant reduction in the output torque of the motor. In some embodiments of the present application, an air-cooled heat dissipation structure is used on the inner side of multiple stator components, and there is no need to use a complex process to construct a cooling channel on the inner side of the stator, nor is there any need to make an additional difficult sealing structure, so that the overall structure of the stator is simple.

[0066] In some embodiments, the stator 1 further includes an internal heat-conducting structure 11. The internal heat-conducting structure 11 is connected to the air-cooling heat dissipation structure 111, and a plurality of stator components 12 are arranged around the internal heat-conducting structure 11. The heat-conducting component 13 at least conducts the heat generated by the stator component 12 to the internal heat-conducting structure 11. In this arrangement, the heat conducted by the heat-conducting component 13 is first transferred to the internal heat-conducting structure 11, and then transferred to the air-cooling heat dissipation structure 111 through the internal heat-conducting structure 11.

[0067] In some embodiments, the internal heat-conducting structure may be a shell. In some embodiments, the internal heat-conducting structure 11 is arranged around the central axis 1A. In some embodiments, the internal heat-conducting structure 11 is annular. The annular shape may be one of a circular annular shape, a rectangular annular shape, and an elliptical annular shape. Exemplarily, the annular shape is a circular annular shape. In other embodiments, the internal heat-conducting structure 11 may include a plurality of internal heat-conducting substructures arranged at intervals, and the plurality of internal heat-conducting substructures are distributed in an annular shape.

[0068] The inner heat-conducting structure 11 includes a heat-conducting material, and the heat-conducting material includes at least one of copper and aluminum.

[0069] In other embodiments, the heat conducting component 13 may be in contact with the air-cooling heat dissipation structure 111 . In this way, the heat conducting component 13 may directly transfer heat to the air-cooling heat dissipation structure 111 .

[0070] In some embodiments, the heat-conducting member 13 includes a heat-conducting metal material, so as to improve the high temperature resistance and heat-conducting efficiency of the heat-conducting member 13. The heat-conducting metal material includes at least one of copper, aluminum alloy or stainless steel.

[0071] In some embodiments, reference Figure 3 to Figure 4 , Figure 6 to Figure 7 as well as Fig.10As shown, the heat-conducting component 13 includes a connecting heat-conducting sheet 131 and a first heat-conducting sheet 132. The connecting heat-conducting sheet 131 extends in the radial direction of the stator 1 and is arranged between adjacent stator components 12. The first heat-conducting sheet 132 is connected to one end of the connecting heat-conducting sheet 131 close to the inner heat-conducting structure 11 and contacts the inner heat-conducting structure 11. In this way, the heat generated by the stator component 12 is transferred to the connecting heat-conducting sheet 131, and then transferred from the connecting heat-conducting sheet 131 to the first heat-conducting sheet 132, and finally transferred to the inner heat-conducting structure 11 through the first heat-conducting sheet 132, and then dissipated by the air-cooled heat dissipation structure 111 connected to the inner heat-conducting structure 11.

[0072] In some embodiments, when the first heat conductive sheet 132 is connected to one end of the connecting heat conductive sheet 131 close to the inner heat conductive structure 11, the first heat conductive sheet 132 is bent relative to the connecting heat conductive sheet 131, and the first heat conductive sheet 132 is disposed between the inner heat conductive structure 11 and the stator component 12. In this configuration, the bending design of the first heat conductive sheet 132 relative to the connecting heat conductive sheet 131, coupled with the contact between the first heat conductive sheet 132 and the inner heat conductive structure 11, increases the contact area between the heat conductive component 13 and the inner heat conductive structure 11, improves the heat conduction efficiency between the two, and further improves the efficiency of the inner heat conductive structure 11 in air cooling and heat dissipation.

[0073] In some embodiments, the two first heat conducting sheets 132 can be connected to the connecting heat conducting sheet 131 and bent toward two sides of the connecting heat conducting sheet 131. In this way, the connecting heat conducting sheet 131 conducts heat to the inner heat conducting structure 11 through the two first heat conducting sheets 132.

[0074] In other embodiments, the first heat conducting sheet 132 and the connecting heat conducting sheet 131 may both extend in the radial direction of the stator 1. This arrangement simplifies the manufacturing process of the heat conducting component 13.

[0075] In some embodiments, the thickness of the connecting heat conductive sheet 131 and the first heat conductive sheet 132 is 0.5 mm to 5 mm. This arrangement ensures the heat conduction effect of the connecting heat conductive sheet 131 and the first heat conductive sheet 132 while ensuring the mechanical strength of the connecting heat conductive sheet 131 and the first heat conductive sheet 132.

[0076] In some embodiments, reference Figure 1 , Figures 3 to 5As shown, when the first heat conducting sheet 132 is bent relative to the connecting heat conducting sheet 131, an inner bonding plane 11A is provided on the surface of the inner heat conducting structure 11 close to the stator component 12. The first heat conducting sheet 132 has a first bonding plane 132A, and the first bonding plane 132A is bonded to the inner bonding plane 11A. In this way, the first bonding plane 132A and the inner bonding plane 11A can be tightly bonded, ensuring that the first heat conducting sheet 132 and the inner heat conducting structure 11 are fully bonded, thereby improving the efficiency of heat conduction from the first heat conducting sheet 132 to the inner heat conducting structure 11.

[0077] It should be noted that, when the first heat conducting sheet 132 is bent relative to the connecting heat conducting sheet 131 , the first bonding plane 132A can be formed by bending a straight heat conducting sheet to obtain the first heat conducting sheet 132 .

[0078] In some embodiments, the area of ​​the first bonding plane 132A is different from the area of ​​the inner bonding plane 11A. This arrangement ensures that the first bonding plane 132A can fully contact the inner bonding plane 11A. In an exemplary embodiment, the area of ​​the inner bonding plane 11A is greater than the area of ​​the first bonding plane 132A.

[0079] In some embodiments, an inner fitting plane 11A faces one stator component 12 and is disposed adjacent to one stator component 12, so that each stator component 12 conducts heat to an inner fitting plane 11A on the inner heat conductive structure 11 through a first heat conductive sheet 132 of a heat conductive component 13, so as to achieve uniform heat dissipation. In the case where an inner fitting plane 11A faces one stator component 12 and is disposed adjacent to one stator component 12, the number of inner fitting planes 11A on the surface of the inner heat conductive structure 11 close to the stator component 12 may be the same as the number of stator components 12, and two adjacent inner fitting planes 11A intersect each other.

[0080] In some embodiments, when the first heat conductive sheet 132 is bent relative to the connecting heat conductive sheet 131 , the first heat conductive sheet 132 is a rectangular sheet, so that the first bonding plane 132A is a rectangular plane, which simplifies the manufacturing process of the first heat conductive sheet 132 .

[0081] In some embodiments, when the first bonding plane 132A is a rectangular plane, the inner bonding plane 11A is also a rectangular plane. This arrangement ensures that the first bonding plane 132A and the inner bonding plane 11A are tightly bonded.

[0082] In some embodiments, reference Figure 3 and Figure 4As shown, there is a gap between the end of the stator component 12 close to the inner heat-conducting structure 11 and the first heat-conducting sheet 132. This arrangement ensures that there is more space between the stator component 12 and the inner heat-conducting structure 11 to arrange and adjust the first heat-conducting sheet 132, ensuring that the first heat-conducting sheet 132 can fit more fully with the inner heat-conducting structure 11.

[0083] In some embodiments, one end of the stator component 12 close to the inner heat-conducting structure 11 contacts the first heat-conducting sheet 132. In this way, the heat of the end of the stator component 12 close to the inner heat-conducting structure 11 can be directly transferred to the heat-conducting ring through the first heat-conducting sheet 132, shortening the heat conduction path and accelerating the heat conduction rate.

[0084] In some embodiments, the inner heat conductive structure 11 is disposed around the air cooling and heat dissipation structure 111. In this way, the air cooling and heat dissipation structure 111 is disposed inside the inner heat conductive structure 11, so that there is space outside the inner heat conductive structure 11 to contact the inner heat conductive structure 11.

[0085] The principle of the air-cooling heat dissipation structure 111 is mainly to remove the heat of the air-cooling heat dissipation structure 111 through air flow, thereby achieving the purpose of lowering the temperature. Figure 1 As shown, the air-cooled heat dissipation structure 111 includes a plurality of heat dissipation fins 1111. The plurality of heat dissipation fins 1111 are arranged on the surface of the inner heat conductive structure 11 away from the stator component 12. In this arrangement, the heat dissipation area is increased by using the heat dissipation fins 1111, and heat is dissipated more effectively.

[0086] In some embodiments, the plurality of heat dissipation fins 1111 may be arranged along the axial direction of the inner heat conductive structure 11 and extend along the circumferential direction. In other embodiments, the plurality of heat dissipation fins 1111 may be arranged along the circumferential direction of the inner heat conductive structure 11 and extend along the axial direction.

[0087] In some embodiments, the heat dissipation fins 1111 include at least one of a strip fin and a pin fin.

[0088] In some embodiments, when the heat dissipation fin 1111 includes a slat-shaped fin, the cross-section of the slat-shaped fin includes one or more of a triangle, a trapezoid, and a rectangle. In some embodiments, when the heat dissipation fin 1111 includes a slat-shaped fin, the thickness of the slat-shaped fin is 0.5 mm to 5 mm. In this way, the heat dissipation effect of the slat-shaped fin is ensured while reducing the manufacturing difficulty of the heat dissipation fin 1111.

[0089] In some embodiments, when the heat dissipation fins 1111 include pin-shaped fins, the diameter of the pin-shaped fins is 0.2 mm to 6 mm. This arrangement ensures the heat dissipation effect of the pin-shaped fins while reducing the manufacturing difficulty of the heat dissipation fins 1111.

[0090] In some embodiments, reference Figures 1 to 7 As shown, the stator 1 further includes an external heat-conducting structure 14, which is arranged around the plurality of stator components 12. The heat-conducting component 13 is also configured to conduct the heat generated by the stator component 12 to the external heat-conducting structure 14. In this way, the heat conducted away by the heat-conducting component 13 can also be conducted away through the external heat-conducting structure 14, thereby improving the heat dissipation efficiency of the stator 1.

[0091] In some embodiments, the outer heat-conducting structure 14 is annular. The annular shape may be one of a circular annular shape, a rectangular annular shape, and an elliptical annular shape. Exemplarily, the annular shape is a circular annular shape. In other embodiments, the inner and outer heat-conducting structures 14 may include a plurality of outer heat-conducting substructures arranged at intervals, and the plurality of outer heat-conducting substructures are distributed in an annular shape.

[0092] In some embodiments, the outer heat-conducting structure 14 includes a heat-conducting material to ensure that the outer heat-conducting structure 14 can conduct heat faster. The heat-conducting material includes at least one of copper and aluminum.

[0093] In some embodiments, the size of the outer heat-conducting structure 14 in the radial direction of the stator 1 is 2 mm to 20 mm.

[0094] In some embodiments, reference Figure 3 to Figure 4 as well as Figure 6 to Figure 7 As shown, the heat conducting member 13 includes a connecting heat conducting sheet 131 and a second heat conducting sheet 133. The connecting heat conducting sheet 131 extends in the radial direction of the stator 1 and is arranged between adjacent stator members 12. The second heat conducting sheet 133 is connected to an end of the connecting heat conducting sheet 131 close to the outer heat conducting structure 14 and contacts the outer heat conducting structure 14. In this arrangement, the heat dissipated from the stator member 12 can also be conducted to the second heat conducting sheet 133 through the connecting heat conducting sheet 131, and then conducted to the outer heat conducting structure 14 through the second heat conducting sheet 133.

[0095] In some embodiments, when the second heat conductive sheet 133 is connected to one end of the connecting heat conductive sheet 131 close to the external heat conductive structure 14, the second heat conductive sheet 133 is bent relative to the connecting heat conductive sheet 131, and the second heat conductive sheet 133 is disposed between the external heat conductive structure 14 and the stator component 12. In this configuration, the second heat conductive sheet 133 is bent relative to the connecting heat conductive sheet 131, and the second heat conductive sheet 133 is in contact with the external heat conductive structure 14, so as to increase the contact area between the heat conductive component 13 and the external heat conductive structure 14, improve the heat conduction efficiency between the two, and further improve the efficiency of heat dissipation through the external heat conductive structure 14.

[0096] In some embodiments, when two second heat conducting sheets 133 are connected to one connecting heat conducting sheet 131, the two second heat conducting sheets 133 are respectively bent toward two sides of the connecting heat conducting sheet 131. In this way, the heat conducted away from the connecting heat conducting sheet 131 is conducted to the external heat conducting structure 14 through the two second heat conducting sheets 133.

[0097] In other embodiments, when the second heat conducting sheet 133 is connected to the end of the connecting heat conducting sheet 131 close to the outer heat conducting structure 14, the second heat conducting sheet 133 and the connecting heat conducting sheet 131 may both extend in the radial direction of the stator 1. This configuration simplifies the manufacturing process of the heat conducting component 13.

[0098] In some embodiments, reference Figure 3 and Figure 4 As shown, when the second heat conducting sheet 133 is bent relative to the connecting heat conducting sheet 131, there is a gap between the end of the stator component 12 close to the outer heat conducting structure 14 and the second heat conducting sheet 133. This arrangement ensures that there is more space between the stator component 12 and the outer heat conducting structure 14 to arrange and adjust the second heat conducting sheet 133, and ensures that the second heat conducting sheet 133 can better fit with the inner heat conducting structure 11.

[0099] In some embodiments, when the second heat conducting sheet 133 is bent relative to the connecting heat conducting sheet 131, the end of the stator component 12 close to the external heat conducting structure 14 contacts the second heat conducting sheet 133. In this way, the heat generated by the end of the stator component 12 close to the external heat conducting structure 14 can be directly conducted to the external heat conducting structure 14 through the second heat conducting sheet 133, shortening the heat conduction path and accelerating the heat conduction rate.

[0100] In some embodiments, reference Figure 1 , Figures 3 to 5 As shown, the surface of the outer heat-conducting structure 14 close to the inner heat-conducting structure 11 is provided with an outer bonding plane 14A, and the second heat-conducting sheet 133 has a second bonding plane 133A, and the second bonding plane 133A is bonded to the outer bonding plane 14A. Such a configuration ensures that the second heat-conducting sheet 133 is fully bonded to the surface of the outer heat-conducting structure 14, improves the efficiency of the heat-conducting component 13 conducting heat to the outer heat-conducting structure 14, and further improves the efficiency of liquid cooling heat dissipation through the outer heat-conducting structure 14.

[0101] It should be noted that, when the second heat conducting sheet 133 is bent relative to the connecting heat conducting sheet 131 , the second bonding plane 133A can be formed by bending a straight heat conducting sheet to obtain the second heat conducting sheet 133 .

[0102] In some embodiments, the area of ​​the second bonding plane 133A is different from the area of ​​the outer bonding plane 14A. This arrangement ensures that the second bonding plane 133A can fully contact the outer bonding plane 14A. Exemplarily, the area of ​​the outer bonding plane 14A is larger than the area of ​​the second bonding plane 133A, ensuring that the entire second bonding plane 133A can contact the outer bonding plane 14A, and reducing the risk of the second heat conductive sheet 133 protruding from the outer heat conductive structure 14 in the axial direction.

[0103] In some embodiments, an outer fitting plane 14A faces one stator component 12 and is disposed adjacent to one stator component 12, so that each stator component 12 conducts heat to an outer fitting plane 14A on the outer heat-conducting structure 14 through the second heat-conducting sheet 133 of one heat-conducting component 13, so as to achieve uniform heat dissipation. In the case where an outer fitting plane 14A faces one stator component 12 and is disposed adjacent to one stator component 12, the number of outer fitting planes 14A disposed on the surface of the outer heat-conducting structure 14 close to the inner heat-conducting structure 11 may be the same as the number of stator components 12, and adjacent two of the plurality of outer fitting planes 14A intersect.

[0104] In some embodiments, the thickness of the second heat conductive sheet 133 is 0.5 mm to 5 mm. In this way, the heat conductive effect of the second heat conductive sheet 133 is ensured while the mechanical strength of the second heat conductive sheet 133 is ensured.

[0105] In some embodiments, reference Figure 4 As shown, when the heat-conducting member 13 includes the first heat-conducting sheet 132, and the first heat-conducting sheet 132 has a first bonding plane 132A that is bonded to the inner bonding plane 11A, the area of ​​the outer bonding plane 14A is larger than the area bonded to the inner bonding plane 11A, and the area of ​​the second bonding plane 133A is larger than the area of ​​the first bonding plane 132A. In this way, the surface of the outer heat-conducting structure 14 close to the inner heat-conducting structure 11 is larger, so as to set a larger outer bonding plane 14A, and correspondingly set a larger second bonding plane 133A, so as to further increase the contact area between the outer heat-conducting structure 14 and the second heat-conducting sheet 133, and accelerate the heat conduction rate between the outer heat-conducting structure 14 and the second heat-conducting sheet 133.

[0106] In some embodiments, reference Figure 6 and Figure 7As shown, when the heat-conducting member 13 includes the first heat-conducting sheet 132, the connecting heat-conducting sheet 131 and the second heat-conducting sheet 133, the first heat-conducting sheet 132 and the second heat-conducting sheet 133 can be respectively connected to the opposite sides of the connecting heat-conducting sheet 131, or the first heat-conducting sheet 132 and the second heat-conducting sheet 133 can be respectively connected to the same side of the connecting heat-conducting sheet 131. In this way, the heat-conducting member 13 can conduct heat to the inner heat-conducting structure 11 on the inner side through the first heat-conducting sheet 132, and conduct heat to the outer heat-conducting structure 14 on the outer side through the second heat-conducting sheet 133.

[0107] In some embodiments, a flow channel 141 for accommodating a cooling fluid is disposed inside the external heat-conducting structure 14. In this configuration, on the basis of adopting air cooling to dissipate heat on the inner side of the plurality of stator components 12, the cooling fluid in the external heat-conducting structure 14 is further used on the outer side of the plurality of stator components 12 to dissipate the heat generated by the stator 1, thereby further improving the heat dissipation efficiency of the stator 1.

[0108] In some embodiments, when the outer heat-conducting structure 14 is annular and a flow channel 141 for accommodating cooling fluid is disposed inside the outer heat-conducting structure 14 , the outer heat-conducting structure 14 may include two sub-shells, which are combined together to form the flow channel 141 .

[0109] In some embodiments, the cooling fluid may include a phase-changing circulating medium. In this way, heat dissipation is achieved by the phase change of the phase-changing circulating medium. In some embodiments, the phase-changing circulating medium includes at least one of water, ammonia, and an organic solvent. In some embodiments, the phase change temperature of the phase-changing circulating medium is 80° C. to 150° C. In some embodiments, the cooling fluid may also include cooling oil.

[0110] In other embodiments, an air-cooling heat dissipation structure (not shown in the figure) may be further provided on the outer side of the external heat-conducting structure 14, and the heat-conducting component 13 is further configured to conduct the heat generated by the stator component 12 to the external heat-conducting structure 14. In this way, on the basis of air-cooling heat dissipation on the inner side of the multiple stator components 12, air-cooling is further used on the outer side of the multiple stator components 12 to dissipate the heat generated by the stator 1, thereby further improving the heat dissipation efficiency of the stator 1. In other embodiments, the air-cooling heat dissipation structure may include but is not limited to heat dissipation fins.

[0111] In some embodiments, reference Figure 3 and Figure 5 As shown, the external heat-conducting structure 14 further includes a liquid inlet 14B and a liquid outlet 14C, and the flow channel 141 is arranged between the liquid inlet 14B and the liquid outlet 14C. In this arrangement, the cooling fluid can flow into the flow channel 141 of the external heat-conducting structure 14 through the liquid inlet 14B, and flow out through the liquid outlet 14C, so as to realize the circulation of the cooling fluid, and the cooling fluid dissipates heat during the circulation process.

[0112] In some embodiments, reference Figure 1 and Figure 2 As shown, the stator 1 also includes a liquid inlet pipe 171 and a liquid outlet pipe 172, both of which are installed on the surface of the outer heat-conducting structure 14 away from the inner heat-conducting structure 11, and the liquid inlet channel inside the liquid inlet pipe 171 is connected to the liquid inlet port 14B of the outer heat-conducting structure 14, and the liquid outlet channel of the liquid outlet pipe 172 is connected to the liquid outlet port 14C of the outer heat-conducting structure 14.

[0113] In some embodiments, the inner diameter of the liquid inlet pipe 171 and the liquid outlet pipe 172 is 1 mm to 20 mm, and the height is 5 mm to 50 mm.

[0114] In some embodiments, the liquid inlet pipe 171 and the liquid outlet pipe 172 include metal heat conductive materials. This arrangement reduces the risk of leakage of the two and improves the heat dissipation efficiency of the cooling fluid in the liquid inlet pipe 171 and the liquid outlet pipe 172.

[0115] The flow channel 141 inside the outer heat conducting structure 14 can be designed in different ways according to actual needs. For axial flux motors 100 with different geometric dimensions and shapes, a flow channel structure with corresponding low flow resistance characteristics can be selected.

[0116] In some embodiments, reference Fig.11 As shown, the flow channel 141 of the external heat-conducting structure 14 can adopt a single flow channel 1411 structure to simplify the manufacturing process of the external heat-conducting structure 14. The two ends of the single flow channel 1411 are respectively connected to the liquid inlet 14B and the liquid outlet 14C. The single flow channel 1411 can extend along the circumferential direction of the external heat-conducting structure 14, or the single flow channel 1411 can extend along the axial direction of the external heat-conducting structure 14.

[0117] In some embodiments, the flow channel 141 includes at least two parallel branch flow channels 1412; and / or, the flow channel 141 includes at least two series branch flow channels 1412. Such an arrangement increases the length of the flow channel 141, thereby increasing the volume of the cooling fluid contained in the flow channel 141, and improving the heat dissipation efficiency of the cooling fluid.

[0118] In some embodiments, reference Fig.12 As shown, the flow channel 141 of the external heat-conducting structure 14 includes a plurality of parallel branch flow channels 1412. The plurality of branch flow channels 1412 are arranged in parallel, and each of the plurality of branch flow channels 1412 is arranged between the liquid inlet 14B and the liquid inlet 14B. In this way, the volume of the cooling fluid contained in the flow channel 141 is increased, and the flow rate and heat dissipation efficiency of the cooling fluid are improved.

[0119] In some embodiments, a plurality of branch channels 1412 may extend along the circumference of the outer heat conductive structure 14 .

[0120] In other embodiments, the flow channel 141 may further include a plurality of branch flow channels 1412 connected in series, and the extension directions of the plurality of branch flow channels 1412 connected in series are different. This configuration increases the volume of the cooling fluid contained in the flow channel 141 and facilitates adjustment of the flow rate of the cooling fluid.

[0121] In some other embodiments, the flow channel 141 may further include at least two parallel branch flow channels 1412 and at least two series branch flow channels 1412. The layout of the at least two parallel branch flow channels 1412 and the at least two series branch flow channels 1412 may be flexibly adjusted as needed.

[0122] In some embodiments, the flow channel 141 includes a circuitous flow channel 1413. This configuration is used to adjust the flow rate and heat dissipation efficiency of the cooling fluid.

[0123] In some embodiments, reference Fig.13 As shown, the circuitous flow channel 1413 may be designed as a π-shaped flow channel. A plurality of π-shaped flow channels may be connected in series.

[0124] In some embodiments, reference Fig.14 and Fig.15 As shown, the circuitous flow channel 1413 can be an S-shaped flow channel. The S-shaped flow channel can be a transverse S-shaped flow channel or a longitudinal S-shaped flow channel. The transverse S-shaped flow channel can extend along the circumference of the outer heat-conducting structure 14. The longitudinal S-shaped flow channel can extend along the axial direction of the outer heat-conducting structure 14.

[0125] In some embodiments, reference Figures 1 to 3 as well as Figure 8 and Fig.10 As shown, a plurality of stator components 12 are distributed around the central axis 1A. The outer heat-conducting structure 14 is coaxially arranged with the inner heat-conducting structure 11. In this way, the plurality of stator components 12, the inner heat-conducting structure 11 and the inner heat-conducting structure 14 are coaxially arranged, ensuring that the heat generated by the plurality of stator components 12 can be dissipated more evenly through the inner heat-conducting structure 11 and the outer heat-conducting structure 14.

[0126] In some embodiments, reference Figure 1 to Figure 2 as well as Figures 8 to 10 As shown, the stator component 12 includes a tooth portion 121, an insulating sheath 16 and a coil 122. The insulating sheath 16 is sleeved on the side wall of the tooth portion 121, the coil 122 is arranged around the side wall of the tooth portion 121, and the insulating sheath 16 is arranged between the tooth portion 121 and the coil 122. At least part of the heat-conducting component 13 is arranged between adjacent coils 122. In this way, the insulating sheath 16 is used to insulate and protect the coil 122, and prevent the tooth portion 121 from scratching the insulating paint of the coil 122 at the corner.

[0127] In some embodiments, the insulating sheath 16 may include a heat conductive material. In this way, the insulating sheath 16 ensures that the heat generated by the tooth portion 121 is better dissipated to the heat conductive member 13 through the insulating sheath 16. In some embodiments, the insulating sheath 16 is made by a casting process or by powder pressing.

[0128] In some embodiments, reference Figure 8 As shown, the stator 1 further includes a yoke 123. The yoke 123 is connected between adjacent teeth 121. The plurality of teeth 121 and the plurality of yokes 123 together form a stator core 124. The stator core 124 is in a disc shape.

[0129] In some embodiments, reference Figure 1 , Figure 3 and Figure 5 As shown, the stator 1 also includes a heat-conducting filling material 15. At least part of the heat-conducting filling material 15 is filled in the gap between the stator component 12 and the heat-conducting component 13. In this way, the heat-conducting filling material 15 fills the gap between the stator component 12 and the heat-conducting component 13, so that the stator component 12 and the heat-conducting component 13 are formed into one body, and the one-piece structure has high structural strength, can effectively resist the axial force when the motor 100 is running, and improve the safety and reliability of the motor 100. In addition, the heat-conducting filling material 15 plays a heat-conducting role, and can transfer the heat generated by the stator component 12 to the heat-conducting component 13 more quickly, thereby improving the efficiency of heat dissipation of the stator component 12.

[0130] In some embodiments, when the stator component 12 includes teeth 121 and coils 122, the thermally conductive filling material 15 also fills the gap between the teeth 121 and the coils 122. In this way, the various parts of the stator component 12 are integrated to better conduct heat to the thermally conductive component.

[0131] In some embodiments, the thermally conductive filling material 15 can be made of a modified resin material with low viscosity, good insulation and thermal conductivity. The modified resin material can be potted by a self-rectifying or vacuum potting process to reduce the formation of potting bubbles and increase the structural strength, insulation and thermal conductivity of the thermally conductive filling material 15. The modified resin material may include epoxy resin and thermally conductive insulating filler dispersed in the epoxy resin, but is not limited thereto. The thermally conductive insulating filler may include at least one of aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide.

[0132] Exemplarily, when the heat-conducting member 13 is closely fitted with the inner heat-conducting structure 11 and the outer heat-conducting structure 14, respectively, the heat dissipation principle of the stator 1 of the embodiment of the present application is as follows: the heat-conducting member 13 is closely fitted with the inner heat-conducting structure 11 and the outer heat-conducting structure 14, respectively, so that the air-cooling heat dissipation of the inner heat-conducting structure 11 realizes the heat dissipation of the inner side of the stator member 12, and the liquid-cooling heat dissipation of the outer heat-conducting structure 14 realizes the heat dissipation of the outer side of the stator member 12, thereby improving the heat dissipation efficiency of the heat generated by the multiple stator members 12. In addition, the inner side of the stator member 12 adopts air-cooling heat dissipation, which can simplify the structure of the stator 1.

[0133] According to the second aspect of the present application, referring to Fig.16 As shown, the embodiment of the present application also provides a motor 100. The motor 100 can be an axial flux motor, which can be used to drive the wheels of a vehicle to rotate. The motor 100 includes the above-mentioned stator 1, a first rotor 21 and a second rotor 22. The first rotor 21 and the second rotor 22 are arranged at intervals along the central axis 1A of the stator 1, and the stator 1 is arranged between the first rotor 21 and the second rotor 22.

[0134] The heat dissipation design of the stator 1 improves the heat dissipation efficiency of the stator 1, thereby ensuring that the motor 100 can work stably. At the same time, the simple structure of the stator 1 simplifies the structure of the motor 100 and improves the problem that the air gap becomes larger due to the sealing structure of the liquid cooling component added inside the stator component 1, thereby significantly reducing the output torque of the motor.

[0135] According to the third aspect of the present application, referring to Fig.17 As shown, the embodiment of the present application further provides a powertrain 200. The powertrain 200 includes the above-mentioned motor 100. The powertrain 200 is used to drive the wheels to rotate. The above-mentioned motor 100 can work stably to ensure that the powertrain 200 stably drives the wheels to rotate.

[0136] According to the fourth aspect of the present application, referring to Fig.18 As shown, the embodiment of the present application also provides a vehicle 300. The vehicle 300 may be a fuel vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., which is not specifically limited in the present application. The vehicle 300 includes the above-mentioned powertrain 200. The powertrain 200 stably drives the wheels to rotate, thereby improving the safety of the vehicle.

[0137] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0138] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0139] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0140] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. Although the descriptions of various embodiments in the embodiments of the present application have different focuses, for the parts not described in detail in a certain embodiment, reference can be made to the relevant contents of other embodiments. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A stator (1), characterized in that: include: Air cooling heat dissipation structure (111); A plurality of stator components (12) are distributed around the air-cooling heat dissipation structure (111); as well as A heat-conducting component (13), at least a portion of which is disposed between adjacent stator components (12) and is configured to conduct heat generated by the stator components (12), wherein at least a portion of the conducted heat is dissipated via the air-cooling heat dissipation portion (111).

2. The stator (1) according to claim 1, characterized in that It also comprises an internal heat-conducting structure (11), the internal heat-conducting structure (11) being connected to the air-cooled heat dissipation structure (111), a plurality of stator components (12) being arranged around the internal heat-conducting structure (11), and the heat-conducting component (13) at least dissipating the heat generated by the stator component (12) to the internal heat-conducting structure (11).

3. The stator (1) according to claim 2, characterized in that The heat-conducting component (13) comprises a connecting heat-conducting sheet (131) and a first heat-conducting sheet (132); the connecting heat-conducting sheet (131) extends in the radial direction of the stator (1) and is arranged between adjacent stator components (12); the first heat-conducting sheet (132) is connected to the connecting heat-conducting sheet (131) and is in contact with the internal heat-conducting structure (11).

4. The stator (1) according to claim 3, characterized in that The first heat conducting sheet (132) is bent relative to the connecting heat conducting sheet (131), and is arranged between the internal heat conducting structure (11) and the stator component (12).

5. The stator (1) according to claim 4, characterized in that The inner heat-conducting structure (11) is provided with an inner bonding plane (11A) on a surface close to the stator component (12); the first heat-conducting sheet (132) has a first bonding plane (132A); and the first bonding plane (132A) is bonded to the inner bonding plane (11A).

6. The stator (1) according to claim 1, characterized in that The air-cooled heat dissipation structure (111) comprises a plurality of heat dissipation fins (1111), and the plurality of heat dissipation fins (1111) are arranged on a surface of the inner heat conductive structure (11) facing away from the stator component (12).

7. The stator (1) according to claim 1, characterized in that Also includes: An external heat-conducting structure (14) is arranged around the plurality of stator components (12), and the heat-conducting component (13) is further configured to conduct heat generated by the stator components (12) to the external heat-conducting structure (14).

8. The stator (1) according to claim 7, characterized in that The heat-conducting component (13) comprises a connecting heat-conducting sheet (131) and a second heat-conducting sheet (133); the connecting heat-conducting sheet (131) extends in the radial direction of the stator (1) and is arranged between adjacent stator components (12); the second heat-conducting sheet (133) is connected to the connecting heat-conducting sheet (131) and is in contact with the external heat-conducting structure (14).

9. The stator (1) according to claim 8, characterized in that The second heat conducting sheet (133) is bent relative to the connecting heat conducting sheet (131), and is arranged between the external heat conducting structure (14) and the stator component (12).

10. The stator (1) according to claim 9, characterized in that The surface of the external heat-conducting structure (14) close to the stator component (12) is provided with an external bonding plane (14A), and the second heat-conducting sheet (133) has a second bonding plane (133A), and the second bonding plane (133A) is bonded to the external bonding plane (14A).

11. The stator (1) according to claim 7, characterized in that A flow channel (141) for accommodating a cooling fluid is provided inside the external heat-conducting structure (14).

12. The stator (1) according to claim 11, characterized in that The external heat-conducting structure (14) is provided with a liquid inlet (14B) and a liquid outlet (14C), and the flow channel (141) is provided between the liquid inlet (14B) and the liquid outlet (14C).

13. The stator (1) according to claim 11, characterized in that The flow channel (141) includes at least two parallel branch flow channels (1412); and / or, The flow channel (141) includes at least two branch flow channels (1412) connected in series.

14. The stator (1) according to claim 11, characterized in that The flow channel (141) includes a circuitous flow channel (1413).

15. The stator (1) according to any one of claims 1 to 14, characterized in that The stator component (12) comprises a tooth portion (121) and a coil (122), and the stator (1) further comprises an insulating sheath (16), wherein the insulating sheath (16) is sleeved on a side wall of the tooth portion (121), the coil (122) is arranged around the side wall of the tooth portion (121), and the insulating sheath (16) is arranged between the tooth portion (121) and the coil (122); at least a portion of the heat-conducting component (13) is arranged between adjacent coils (122).

16. The stator (1) according to any one of claims 1 to 14, characterized in that The stator (1) further comprises a heat-conducting filling material (15), and at least a portion of the heat-conducting filling material (15) is filled in the gap between the stator component (12) and the heat-conducting component (13).

17. A motor (100), characterized in that: Comprising a stator (1) according to any one of claims 1 to 16.

18. A powertrain (200), characterized in that: The electric machine (100) comprises the electric machine (100) as claimed in claim 17.

19. A vehicle (300), characterized in that: Comprising the powertrain (200) as claimed in claim 18.

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