Stator assembly, motor, power assembly and vehicle

Abstract

The invention relates to a stator assembly, a motor, a power assembly and a vehicle, the stator assembly comprises a stator iron core and a stator winding, the stator iron core is internally provided with a wire slot and a first cooling channel which extend along the axial direction of the stator iron core, the stator iron core is also internally provided with a rotor accommodating cavity, the stator winding comprises a plurality of wires, and the plurality of wires are all accommodated in the wire slot; wherein the first cooling channel is located on one side of the wire slot, and the first cooling channel is far away from the first wire and / or far away from the rotor accommodating cavity in the radial direction of the stator; according to the stator assembly provided by the embodiment of the invention, the influence of the first cooling channel on the electromagnetic performance of the motor can be reduced.

Description

Technical Field

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

[0002] The motor uses cooling oil as a cooling medium to dissipate heat from the stator winding of the motor. However, since the stator winding is located in the stator core, in the related art, an oil tank is provided in the stator core, and the cooling oil is introduced into the oil tank to exchange heat with the stator winding. However, in the related art, the oil tank is located in the stator core close to the cavity where the rotor is installed, so that the oil tank has a greater influence on the electromagnetic performance of the motor. Summary of the invention

[0003] The embodiments of the present application provide a stator assembly, a motor, a powertrain and a vehicle, which can cool the stator winding of the motor while reducing the electromagnetic influence on the motor, so as to at least partially solve the above-mentioned technical problems.

[0004] In order to achieve the above-mentioned object, in a first aspect, the present application provides a stator assembly, including a stator core and a stator winding;

[0005] The stator core is provided with a wire slot and a first cooling channel extending along the axial direction of the stator core, and the first cooling channel is located on at least one side of the wire slot;

[0006] A rotor accommodating cavity is also provided in the stator core;

[0007] The stator winding includes a plurality of conductors, and the plurality of conductors are all accommodated in the wire slots;

[0008] Among them, in the radial direction of the stator core, the conductor among the multiple conductors that is closest to the rotor accommodating cavity is the first conductor; the first cooling channel is arranged in the radial direction of the stator core away from the first conductor and / or the rotor accommodating cavity.

[0009] In some embodiments, a plurality of first cooling channels arranged at intervals are provided on the peripheral side of the wire slot;

[0010] A plurality of first cooling channels located on the peripheral side of the wire slots are arranged in a radial direction of the stator core.

[0011] In some embodiments, a first cooling channel corresponds to at least one wire to perform heat exchange with the wire adjacent to the first cooling channel.

[0012] In some embodiments, in a plane perpendicular to the radial direction of the stator core, a projection of the first cooling channel on the plane is outside a projection range of the first conductive wire on the plane.

[0013] In some embodiments, the wire duct includes:

[0014] A first end wall and a second end wall, wherein the first end wall is disposed close to the rotor accommodating cavity; and

[0015] A first side wall and a second side wall, wherein the first side wall and the second side wall are located between the first end wall and the second end wall;

[0016] The first end wall, the second end wall, the first side wall and the second side wall are sequentially connected end to end, and a plurality of first cooling channels are arranged close to at least one of the first side wall, the second side wall and the second end wall.

[0017] In some embodiments, among the plurality of first cooling channels, a portion of the first cooling channels are disposed close to the first side wall, and another portion of the first cooling channels are disposed close to the second side wall;

[0018] A portion of the first cooling channel close to the first side wall and another portion of the first cooling channel close to the second side wall are symmetrically arranged along the center line of the wire groove.

[0019] In some embodiments, the first cooling channel is in communication with the wire groove.

[0020] In some embodiments, the wire slot is in communication with the rotor accommodating cavity;

[0021] The stator assembly also includes a sealing member, which is located on the cavity wall of the rotor accommodating cavity and seals the wire slot.

[0022] In some embodiments, the seal comprises:

[0023] A sealing body is located in the rotor accommodating cavity and is disposed close to a cavity wall of the rotor accommodating cavity; and

[0024] A plurality of convex parts are arranged on the sealing body and extend to the communicating position between the wire groove and the rotor accommodating cavity.

[0025] According to a second aspect of the present application, there is provided a motor, comprising:

[0026] stator assembly; and

[0027] The stator assembly is installed in the housing.

[0028] In some embodiments, the motor further comprises an oil collecting member, which is disposed on one side of the stator core in the axial direction and abuts against the stator core to enclose and form a first sealed cavity;

[0029] Wherein, the first sealed cavity is communicated with the first cooling channel.

[0030] In some embodiments, the stator winding includes a first end and a second end, and the first end and the second end of the stator winding are respectively located on two sides of the stator core in the axial direction;

[0031] The oil collecting member is provided with an avoidance groove, and the first end portion or the second end portion of the stator winding is embedded in the avoidance groove and extends out from a side of the oil collecting member away from the stator iron core.

[0032] In some embodiments, the motor further comprises a first spraying member, the first spraying member being located on one side of the stator core in the axial direction of the stator core and in contact with the stator core;

[0033] The first spray member is provided with a first cavity on a side close to the stator core, the first end of the stator core is located in the first cavity, and the first spray member is configured to provide cooling oil to the first end of the stator core.

[0034] In some embodiments, the oil collecting member is located in the first cavity, and at least one connecting groove is provided on the oil collecting member, and the connecting groove connects the first cavity and the first sealing cavity.

[0035] In some embodiments, the motor further comprises a second spraying member, the second spraying member being located at the other side of the stator core in the axial direction and in contact with the stator core;

[0036] The second spray member is provided with a second cavity on a side close to the stator core, the second end of the stator core is located in the second cavity, and the second spray member is configured to provide cooling oil to the second end of the stator core.

[0037] In some embodiments, a second sealed cavity is formed between the first spray element and the inner wall of the housing, and the first spray element is configured to transfer cooling oil in the second sealed cavity to the first cavity; and / or

[0038] A third sealed cavity is formed between the second spraying member and the inner wall of the shell, and the second spraying member is configured to transfer cooling oil in the third sealed cavity to the second cavity.

[0039] In some embodiments, a second sealed cavity is formed between the first spray element and the inner wall of the shell, and a third sealed cavity is formed between the second spray element and the inner wall of the shell;

[0040] Wherein, the second sealed cavity and the third sealed cavity are communicated with each other.

[0041] In some embodiments, a connecting channel extending along the axial direction of the stator core is further provided in the stator core;

[0042] Wherein, the second sealed cavity is communicated with the third sealed cavity through a connecting channel.

[0043] In some embodiments, a second cooling channel is further provided in the shell, and the second cooling channel is communicated with the first cavity.

[0044] In some embodiments, the motor further comprises a rotor, at least a portion of which is located in the rotor receiving cavity;

[0045] Two bearing chambers are also provided in the housing. The two bearing chambers are respectively located on both sides of the rotor accommodating cavity in the axial direction of the stator core. Bearings are provided in the bearing chambers and are connected to the rotor.

[0046] The second cooling channel is also connected to at least one bearing chamber.

[0047] According to a third aspect of the present application, a powertrain is provided, comprising an electric motor.

[0048] According to a fourth aspect of the present application, a vehicle is provided, comprising a powertrain.

[0049] In the stator assembly, motor, powertrain and vehicle provided in the embodiments of the present application, a first cooling channel is provided in the stator core to dissipate heat for the wires in the wire slots. At the same time, since the first cooling channel is located away from the first wire and / or away from the rotor accommodating cavity, the position setting of the first cooling channel can reduce the influence of the first cooling channel on the electromagnetic performance of the motor.

[0050] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] 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.

[0052] 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.

[0053] Figure 1 is a cross-sectional schematic diagram of a motor provided in an exemplary embodiment of the present application;

[0054] Figure 2 is a schematic structural diagram of a stator lamination provided in an exemplary embodiment of the present application;

[0055] Figure 3 yes Figure 2 A magnified schematic diagram of part A;

[0056] Figure 4 is a schematic structural diagram of a seal provided in an exemplary embodiment of the present application;

[0057] Figure 5 is a schematic structural diagram of an oil collecting member provided in an exemplary embodiment of the present application;

[0058] Figure 6 is a schematic cross-sectional view of a motor provided in an exemplary embodiment of the present application.

[0059] Description of reference numerals:

[0060] 1000, motor; 100, stator assembly; 1, stator; 11, stator core; 111, stator lamination; 12, stator winding; 121, conductor; 122, first end; 123, second end; 2, wire slot; 2A, first end wall; 2B, second end wall; 2C, first side wall; 2D, second side wall; 3, first cooling channel; 4, rotor accommodating cavity; 5, rotor; 51, rotor lamination; 52, rotating shaft; 6, seal; 61, seal body; 62, convex portion; 7, housing; 71, housing body; 72. Cover body; 8. Oil collecting part; 9. First sealing chamber; 10. Avoidance groove; 13. First spray part; 14. First cavity; 15. Connecting groove; 16. Second spray part; 17. Second cavity; 18. Second sealing chamber; 19. Third sealing chamber; 20. Connecting channel; 21. Second cooling channel; 211. Liquid inlet end; 212. First sub-channel; 213. Second sub-channel; 214. Third sub-channel; 22. Bearing chamber; 23. Bearing; 24. First sealing ring; 25. Second sealing ring; 26. Magnetic isolation part. DETAILED DESCRIPTION

[0061] 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.

[0062] The present application proposes a stator assembly. Figures 1 to 6 These are some embodiments of the present application.

[0063] See also Figures 1 to 3 In some embodiments of the present application, the stator assembly 100 includes a stator core 11 and a stator winding 12. The stator core 11 is provided with a wire slot 2 and a first cooling channel 3 extending along the axial direction of the stator core 11. The stator winding 12 includes a plurality of wires 121, and the plurality of wires 121 are all accommodated in the wire slot 2; wherein the first cooling channel 3 dissipates heat for the wires 121 in the wire slot 2.

[0064] In some embodiments of the present application, a rotor accommodating cavity 4 is further provided in the stator core 11 , and the rotor accommodating cavity 4 is configured to accommodate the rotor 5 .

[0065] In some embodiments of the present application, the first cooling channel 3 is located on one side of the wire slot 2, and the first cooling channel 3 is away from the wire 121 closest to the rotor accommodating cavity 4 among the multiple wires 121 in the radial direction of the stator core 11, that is, away from the first wire.

[0066] In some embodiments of the present application, the first cooling channel 3 is located at one side of the wire slot 2 , and the first cooling channel 3 is away from the rotor accommodating cavity 4 in the radial direction of the stator core 11 .

[0067] In the technical solution of the present application, a first cooling channel 3 is provided in the stator core 11 to dissipate heat for the wire 121 in the wire slot 2. At the same time, since the first cooling channel 3 is located away from the first wire and / or away from the rotor accommodating cavity 4, the position setting of the first cooling channel 3 can reduce the influence of the first cooling channel 3 on the electromagnetic performance of the motor 1000.

[0068] In some embodiments of the present application, the stator core 11 includes a plurality of stator laminations 111 stacked in the axial direction of the stator core 11, the plurality of stator laminations 111 are all limited in the motor 1000, and a wire hole and a through hole are provided on each stator lamination 111. The plurality of stator laminations 111 are stacked so that the plurality of wire holes are interconnected to form a wire slot 2, and the plurality of through holes are interconnected to form a first cooling channel 3.

[0069] In addition, there is no restriction on the shape of the vias, which may be circular, oval, square, rectangular, or may be designed as a special-shaped structure.

[0070] In some embodiments of the present application, a stator core 11 and a stator winding 12 constitute a stator 1 .

[0071] The number of the wire slots 2 and the number of the first cooling channels 3 in the embodiment of the present application are also not limited and can be designed according to actual production.

[0072] In some embodiments of the present application, the rotor 5 includes a plurality of rotor laminations 51 stacked in the axial direction of the stator core 11 , and the plurality of rotor laminations 51 are all located in the rotor accommodating cavity 4 .

[0073] In addition, the rotor 5 also includes a rotating shaft 52, which extends along the axial direction of the stator core 11 and is rotatably installed in the motor 1000. Multiple rotor laminations 51 are all installed on the rotating shaft 52, so that the rotor 5 can rotate in the motor 1000 under the action of the magnetic field.

[0074] In some embodiments of the present application, magnetic isolation members 26 are further provided on both sides of the stator core 11 in the axial direction of the stator core 11 .

[0075] In some embodiments of the present application, the multiple wires 121 located in the wire slot 2 are arranged radially of the stator core 11 and insulating paper is provided on the outer periphery of the multiple wires 121. The insulating paper covers the multiple wires 121 to prevent the insulating paint on the surface of the wires 121 from being punctured under high voltage, thereby causing the motor 1000 to be burned.

[0076] In some embodiments of the present application, a plurality of first cooling channels 3 are arranged at intervals on the circumferential side of the wire slot 2; the plurality of first cooling channels 3 located on the circumferential side of the wire slot 2 are arranged radially along the stator core 11; wherein, by providing a plurality of first cooling channels 3, the amount of cooling oil passing into the stator core 11 can be increased, so as to improve the heat dissipation effect of the plurality of wires 121 in the wire slot 2.

[0077] In addition, the plurality of first cooling channels 3 are distributed at intervals to simultaneously dissipate heat from various locations of the plurality of wires 121 in the wire slot 2, thereby improving temperature uniformity.

[0078] In some embodiments of the present application, a first cooling channel 3 corresponds to at least one wire 121 to perform heat exchange on the wire 121 adjacent to the first cooling channel 3; that is, in this embodiment, the first cooling channel 3 can perform heat exchange on one wire 121, and can also perform heat exchange on two or more wires 121 at the same time, without limitation herein.

[0079] See also Figure 3 In some embodiments of the present application, the first cooling channel 3 is disposed at a position corresponding to two wires 121 , so that heat exchange can be performed on the two wires 121 .

[0080] In some embodiments of the present application, in a plane perpendicular to the radial direction of the stator core 11, the projection of the first cooling channel 3 on the plane is outside the projection range of the first wire on the plane; that is, in this embodiment, the first cooling channel 3 is away from the first wire 121 and does not overlap with the first wire in a direction perpendicular to the radial direction of the stator core 11, thereby reducing the influence of the first cooling channel 3 on the electromagnetic performance of the motor 1000.

[0081] In some embodiments of the present application, the wire groove 2 includes a first end wall 2A and a second end wall 2B, and the first end wall 2A is provided with a first side wall 2C and a second side wall 2D near the rotor accommodating cavity 4, and the first side wall 2C and the second side wall 2D are located between the first end wall 2A and the second end wall 2B; wherein the first end wall 2A, the second end wall 2B, the first side wall 2C and the second side wall 2D are connected end to end in sequence, that is, the first end wall 2A, the second end wall 2B, the first side wall 2C and the second side wall 2D enclose the wire groove 2.

[0082] Among them, multiple first cooling channels 3 are arranged near at least one of the first side wall 2C, the second side wall 2D and the second end wall 2B; that is, in one embodiment, multiple first cooling channels can be arranged only on one side of the first side wall 2C, the second side wall 2D and the second end wall 2B, so as to dissipate heat for the multiple wires 121 in the wire trough 2; in another embodiment, the multiple first cooling channels 3 are divided into two or three parts, and are respectively located on one side of two or three of the first side wall 2C, the second side wall 2D and the second end wall 2B, so as to dissipate heat for the multiple wires 121 in the wire trough 2.

[0083] In some embodiments of the present application, multiple first cooling channels 3 are arranged near at least one of the first side wall 2C and the second side wall 2D. This arrangement is because the wires 121 are arranged along the radial direction of the stator core 11, and therefore the length dimensions of the first side wall 2C and the second side wall 2D are greater than the length dimensions of the first end wall 2A and the second end wall 2B. Multiple first cooling channels 3 are arranged near the first side wall 2C and / or the second side wall 2D to improve the heat dissipation effect of the multiple wires 121 in the wire slot 2.

[0084] In some embodiments of the present application, among the multiple first cooling channels 3, a portion of the first cooling channels 3 are arranged close to the first side wall 2C, and another portion of the first cooling channels 3 are arranged close to the second side wall 2D; such an arrangement enables the multiple first cooling channels 3 to simultaneously dissipate heat on both sides of the wire 121 close to the first side wall 2C and close to the second side wall 2D, so as to improve the heat dissipation effect of the wire 121.

[0085] In some embodiments of the present application, multiple first cooling channels 3 near the first side wall 2C and multiple first cooling channels 3 near the second side wall 2D are symmetrically arranged along the center line B of the wire slot 2; such an arrangement allows the first cooling channels 3 to not only dissipate heat for the multiple wires 121 in the wire slot 2, but also balance the electromagnetic force output by the motor 1000.

[0086] In some embodiments of the present application, the first cooling channel 3 is connected to the wire slot 2. By setting the first cooling channel 3 to be connected to the wire slot 2, the cooling oil can directly contact the wire 121 in the wire slot 2 to improve the heat dissipation capacity of the wire 121.

[0087] In some embodiments of the present application, the wire slot 2 is communicated with the rotor accommodating cavity 4; the stator assembly 100 further includes a seal 6, which is located on the cavity wall of the rotor accommodating cavity 4 and seals the wire slot 2. The seal 6 is provided to prevent cooling oil from dripping into the gap between the stator 1 and the rotor 5.

[0088] See also Figure 4In some embodiments of the present application, the seal 6 includes a seal body 61 and a plurality of protrusions 62. The seal body 61 is located in the rotor accommodating cavity 4 and is arranged close to the cavity wall of the rotor accommodating cavity 4. The plurality of protrusions 62 are arranged on the seal body 61 and extend to the connecting position between the wire slot 2 and the rotor accommodating cavity 4. This arrangement is used to improve the sealing performance of the seal 6.

[0089] In some embodiments of the present application, the seal 6 is a plastic-wrapped structure, that is, plastic is wrapped around the stator core 11 through an injection molding process.

[0090] See also Figure 3 In some embodiments of the present application, a plurality of wires 121 are arranged and distributed in the wire slots 2 along the radial direction of the stator core 11; wherein, in the radial direction of the stator core 11 and in the direction away from the rotor accommodating cavity 4, the plurality of wires 121 are respectively a first wire, a second wire, a third wire, a fourth wire, a fifth wire and a sixth wire; in the related art, a first cooling channel 3 is also provided between the first wire and the second wire, but the first cooling channel 3 located between the first wire and the second wire has the greatest influence on the electromagnetic performance of the motor, and the influence on the electromagnetic performance of the motor is approximately equal to the influence on the electromagnetic performance of the motor caused by the first cooling channel 3 being provided between the second wire and the third wire, between the third wire and the fourth wire, between the fourth wire and the fifth wire, and between the fifth wire and the sixth wire.

[0091] Therefore, in some embodiments of the present application, the first cooling channel 3 disposed between the first wire and the second wire is eliminated, so as to reduce the influence of the first cooling channel 3 on the electromagnetic performance of the motor 1000 while dissipating the heat of the wire 121 located in the wire slot 2.

[0092] The present application also proposes a motor 1000, which includes a stator assembly 100 and a housing 7, wherein the stator assembly 100 is installed in the housing 7; the stator assembly 100 is as described above, and since the motor 1000 adopts all the technical solutions of all the above-mentioned embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0093] See also Figure 1 and Figure 5 In some embodiments of the present application, the motor 1000 also includes an oil collecting member 8, which is arranged on one side of the stator core 11 in the axial direction and abuts against the stator core 11 to enclose a first sealed cavity 9; wherein the first sealed cavity 9 is connected to the first cooling channel 3; that is, the cooling oil can be introduced from the first sealed cavity 9 of the oil collecting member 8 into the first cooling channel 3 to prevent the cooling oil from entering other positions of the motor 1000.

[0094] In some embodiments of the present application, the oil collecting member 8 is provided with a first sealed cavity 9 on the side of the stator core 11 in the axial direction of the stator core 11, and the first sealed cavity 9 is opened to communicate with the first cooling channel 3 when the oil collecting member 8 is installed on the side of the stator core 11 in the axial direction.

[0095] It can be understood that after the oil collecting member 8 and the stator core 11 are assembled, the first sealed cavity 9 is sealed by the oil collecting member 8 and the stator core 11 .

[0096] It can be understood that, in some embodiments of the present application, a plurality of first cooling channels 3 are provided, and the plurality of first cooling channels 3 are simultaneously connected to the first sealing cavity 9 .

[0097] In some embodiments of the present application, the stator winding 12 includes a first end 122 and a second end 123, and the first end 122 and the second end 123 of the stator winding 12 are respectively located on both sides of the stator core 11 in the axial direction of the stator core 11; an avoidance groove 10 is provided on the oil collecting piece 8, and the first end 122 or the second end 123 of the stator winding 12 is embedded in the avoidance groove 10 and extends from the side of the oil collecting piece 8 away from the stator core 11; by providing the avoidance groove 10, the oil collecting piece 8 will not interfere with the structure of the stator winding 12; at the same time, the structure of the stator winding 12 will not interfere with the fit between the oil collecting piece 8 and the stator core 11.

[0098] In some embodiments of the present application, the stator winding 12 is a flat wire winding, one of the first end 122 and the second end 123 of the stator winding 12 is a hairpin end of the flat wire winding, and the other is a welding end of the flat wire winding.

[0099] In some embodiments of the present application, the oil collecting member 8 is passed through the hairpin end of the flat wire winding.

[0100] In some embodiments of the present application, the motor 1000 further includes a first spray member 13, which is located on one side of the stator core 11 in the axial direction of the stator core 11 and is in contact with the stator core 11; wherein the first spray member 13 is provided with a first cavity 14 on a side close to the stator core 11, and the first end 122 of the stator core 11 is located in the first cavity 14, and the first spray member 13 is configured to provide cooling oil to the first end 122 of the stator core 11; wherein the first spray member 13 has a type of spray port, so that the cooling oil can be sprayed to the first end 122 to dissipate heat from the first end 122 of the stator winding 12.

[0101] See also Figures 1 to 5In some embodiments of the present application, the oil collecting member 8 is located in the first cavity 14, and at least one connecting groove 15 is provided on the oil collecting member 8, and the connecting groove 15 connects the first cavity 14 and the first sealed cavity 9; that is, in this embodiment, the first spray member 13 is provided with another type of spray port, so as to introduce the cooling oil into the connecting groove 15, and then allow the cooling oil to enter the first sealed cavity 9.

[0102] In addition, the oil collecting member 8 is disposed in the first cavity 14 of the first spraying member 13 and does not occupy additional space in the motor 1000 .

[0103] In some embodiments of the present application, the motor 1000 further includes a second spray member 16, which is located on the other side of the stator core 11 in the axial direction of the stator core 11 and is in contact with the stator core 11; wherein the second spray member 16 is provided with a second cavity 17 on a side close to the stator core 11, and the second end 123 of the stator core 11 is located in the second cavity 17, and the second spray member 16 is configured to provide cooling oil to the second end 123 of the stator core 11; wherein the second spray member 16 has a type of spray port, so that the cooling oil can be sprayed to the second end 123 to dissipate the heat of the second end 123 of the stator winding 12.

[0104] In some embodiments of the present application, the first spray member 13 , the second spray member 16 and the oil collecting member 8 are provided simultaneously, so that the conductor 121 , the first end 122 and the second end 123 of the stator winding 12 can be cooled simultaneously.

[0105] In some embodiments of the present application, a second sealed cavity 18 is formed between the first spray member 13 and the inner wall of the shell 7, and the first spray member 13 is configured to transfer the cooling oil in the second sealed cavity 18 to the first cavity 14; in this embodiment, the motor 1000 introduces the cooling oil into the second sealed cavity 18, so that the first spray member 13 can spray the cooling oil in the second sealed cavity 18 into the first cavity 14 to dissipate heat to the first end portion 122 located in the first cavity 14, and can also introduce the liquid cooling oil into the first sealed cavity 9 of the oil collecting member 8.

[0106] A first sealing ring 24 is further provided between the first spraying element 13 and the housing 7 to ensure the sealing of the second sealing cavity 18 .

[0107] In some embodiments of the present application, a third sealed cavity 19 is formed between the second spray member 16 and the inner wall of the housing 7, and the second spray member 16 is configured to transfer the cooling oil in the third sealed cavity 19 to the second cavity 17; in this embodiment, the motor 1000 introduces the cooling oil into the third sealed cavity 19 so that the second spray member 16 can spray the cooling oil in the third sealed cavity 19 into the second cavity 17 to dissipate the heat of the second end 123 located in the second cavity 17.

[0108] In some embodiments of the present application, the shell 7 includes a shell body 71 and a cover body 72 connected to each other; wherein a second sealed cavity 18 is formed between the first spray element 13 and the shell body 71, and a third sealed cavity 19 is formed between the second spray element 16 and the shell body 71 and the cover body 72.

[0109] See also Figure 6 In some embodiments of the present application, a second sealed cavity 18 is formed between the first spray member 13 and the inner wall of the housing 7, and a third sealed cavity 19 is formed between the second spray member 16 and the inner wall of the housing 7; wherein the second sealed cavity 18 and the third sealed cavity 19 are interconnected; by providing the connection between the second sealed cavity 18 and the third sealed cavity 19, the flowability of the cooling oil in the motor 1000 is improved, and there is no need to provide multiple cooling oil injection ports in the motor 1000.

[0110] In some embodiments of the present application, a connecting channel 20 extending along the axial direction of the stator core 11 is further provided in the stator core 11; wherein the second sealed cavity 18 is connected to the third sealed cavity 19 via the connecting channel 20; that is, in this embodiment, the second sealed cavity 18 and the third sealed cavity 19 are connected to each other by providing the connecting channel 20, so as to improve the fluidity of the cooling oil in the motor 1000, and there is no need to provide multiple cooling oil injection ports in the motor 1000.

[0111] In some embodiments of the present application, the connection channel 20 is located at the yoke of the stator laminations 111 to reduce the impact on the electromagnetic performance of the motor.

[0112] In some embodiments of the present application, a second cooling channel 21 is further provided in the housing 7 , and the second cooling channel 21 is communicated with the first cavity 14 ; wherein cooling oil can be introduced into the motor 1000 from the second cooling channel 21 .

[0113] In some embodiments of the present application, the second cooling channel 21 includes a liquid inlet end 211 and a second sub-channel 213 , and cooling oil can be introduced into the motor 1000 from the liquid inlet end 211 . The second sub-channel 213 connects the second sealed cavity 18 and the liquid inlet end 211 .

[0114] In some embodiments of the present application, the motor 1000 also includes a rotor 5, at least part of which is located in the rotor accommodating cavity 4; two bearing chambers 22 are also provided in the housing 7, and the two bearing chambers 22 are respectively located on both sides of the rotor accommodating cavity 4 in the axial direction of the stator core 11, and a bearing 23 is provided in the bearing chamber 22, and the bearing 23 is connected to the rotor 5; wherein the second cooling channel 21 is also connected to at least one bearing chamber 22; that is, in this embodiment, the second cooling channel 21 can also dissipate heat for the bearing 23 at the same time.

[0115] In some embodiments of the present application, the second cooling channel 21 is in communication with both bearing chambers 22 to dissipate heat from two bearings 23 connected to the rotating shaft 52 at the same time.

[0116] In some embodiments of the present application, the second cooling channel 21 further includes a second sub-channel 213 and a third sub-channel 214 , the second sub-channel 213 is connected to a bearing chamber 23 and the liquid inlet end 211 , and the third sub-channel 214 is connected to another bearing chamber 23 and the second sub-channel 213 .

[0117] It should be noted that the motor in the embodiment of the present application can be a drive motor or a generator; this is not limited here.

[0118] The present application also proposes a powertrain, including a motor 1000. The motor 1000 is as described above. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0119] The present application also proposes a vehicle, which includes a powertrain, and the powertrain is as described above. Since the vehicle adopts all the technical solutions of all the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0120] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle or a new energy vehicle, etc., and this application does not make any specific limitation on this.

[0121] 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.

[0122] 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.

[0123] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0124] The above are only preferred embodiments of the present application and do not constitute any form of limitation to the present application. 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 assembly, characterized in that: Including stator core and stator winding; The stator core is provided with a wire slot extending along the axial direction of the stator core and a first cooling channel, wherein the first cooling channel is located at least on one side of the wire slot; A rotor accommodating cavity is also provided in the stator core; The stator winding includes a plurality of conductors, and the plurality of conductors are all accommodated in the wire slots; Among them, in the radial direction of the stator core, the conductor closest to the rotor accommodating cavity among the multiple conductors is the first conductor; and the first cooling channel is arranged away from the first conductor and / or the rotor accommodating cavity in the radial direction of the stator core.

2. The stator assembly according to claim 1, characterized in that: A plurality of the first cooling channels are arranged at intervals on the peripheral side of the wire groove; The plurality of first cooling channels located on the peripheral sides of the wire slots are arranged in a radial direction of the stator core.

3. The stator assembly according to claim 2, characterized in that: One of the first cooling channels corresponds to at least one of the wires, so as to perform heat exchange on the wire adjacent to the first cooling channel.

4. The stator assembly according to claim 1, characterized in that: In a plane perpendicular to the radial direction of the stator core, a projection of the first cooling channel on the plane is outside a projection range of the first conductive wire on the plane.

5. The stator assembly according to claim 1, characterized in that: The wire duct comprises: A first end wall and a second end wall, wherein the first end wall is disposed close to the rotor accommodating cavity; and A first side wall and a second side wall, wherein the first side wall and the second side wall are located between the first end wall and the second end wall; The first end wall, the second end wall, the first side wall and the second side wall are sequentially connected end to end, and a plurality of the first cooling channels are arranged close to at least one of the first side wall, the second side wall and the second end wall.

6. The stator assembly according to claim 5, characterized in that Among the plurality of first cooling channels, a portion of the first cooling channels are disposed close to the first side wall, and another portion of the first cooling channels are disposed close to the second side wall; A portion of the first cooling channel close to the first side wall and another portion of the first cooling channel close to the second side wall are symmetrically arranged along the center line of the wire groove.

7. The stator assembly according to any one of claims 1 to 6, characterized in that: The first cooling channel is in communication with the wire groove.

8. The stator assembly according to any one of claims 1 to 6, characterized in that: The wire groove is in communication with the rotor accommodating cavity; The stator assembly further includes a sealing member, which is located on a cavity wall of the rotor accommodating cavity and seals the wire slot.

9. The stator assembly according to claim 8, characterized in that The sealing element comprises: A sealing body is located in the rotor accommodating cavity and is disposed close to a cavity wall of the rotor accommodating cavity; and A plurality of convex parts are arranged on the sealing body and extend to the communicating position between the wire groove and the rotor accommodating cavity.

10. A motor, characterized in that: include: The stator assembly according to any one of claims 1 to 9; and A housing, wherein the stator assembly is installed in the housing.

11. The motor according to claim 10, characterized in that The motor further comprises an oil collecting member, which is arranged on one side of the stator core in the axial direction and abuts against the stator core to enclose and form a first sealed cavity; Wherein, the first sealed cavity is communicated with the first cooling channel.

12. The motor according to claim 11, characterized in that The stator winding comprises a first end and a second end, and the first end and the second end of the stator winding are respectively located on two sides of the stator core in the axial direction; The oil collecting member is provided with an escape groove, and the first end or the second end of the stator winding is embedded in the escape groove and extends out from a side of the oil collecting member away from the stator core.

13. The motor according to claim 12, characterized in that The motor further comprises a first spraying member, wherein the first spraying member is located on one side of the stator core in the axial direction of the stator core and contacts the stator core; The first spray member is provided with a first cavity on a side close to the stator core, the first end of the stator core is located in the first cavity, and the first spray member is configured to provide cooling oil to the first end of the stator core.

14. The motor according to claim 13, characterized in that The oil collecting member is located in the first cavity, and at least one connecting groove is provided on the oil collecting member, and the connecting groove connects the first cavity and the first sealing cavity.

15. The motor according to claim 13, characterized in that The motor further comprises a second spraying member, which is located at the other side of the stator core in the axial direction and contacts the stator core; The second spray member is provided with a second cavity on a side close to the stator core, the second end of the stator core is located in the second cavity, and the second spray member is configured to provide cooling oil to the second end of the stator core.

16. The motor according to claim 15, characterized in that A second sealed cavity is formed between the first spraying member and the inner wall of the housing, and the first spraying member is configured to transfer cooling oil in the second sealed cavity to the first cavity; and / or A third sealed cavity is formed between the second spraying member and the inner wall of the housing, and the second spraying member is configured to transfer cooling oil in the third sealed cavity to the second cavity.

17. The electric machine according to claim 16, characterized in that A second sealed cavity is formed between the first spray element and the inner wall of the shell, and a third sealed cavity is formed between the second spray element and the inner wall of the shell; Wherein, the second sealed cavity and the third sealed cavity are communicated with each other.

18. The electric machine according to claim 17, characterized in that The stator core is also provided with a connecting channel extending along the axial direction of the stator core; Wherein, the second sealed cavity is communicated with the third sealed cavity through the connecting channel.

19. The motor according to claim 13, characterized in that A second cooling channel is also provided in the shell, and the second cooling channel is communicated with the first cavity.

20. The electric machine according to claim 19, characterized in that The motor further comprises a rotor, at least a portion of which is located in the rotor accommodating cavity; Two bearing chambers are also provided in the housing, and the two bearing chambers are respectively located on both sides of the rotor accommodating cavity in the axial direction of the stator core, and bearings are provided in the bearing chambers, and the bearings are connected to the rotor; Wherein, the second cooling channel is also connected to at least one of the bearing chambers.

21. A powertrain, characterized in that: Comprising a motor as claimed in any one of claims 10 to 20.

22. A vehicle, characterized in that: Comprising the powertrain as claimed in claim 21.

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