Stator core, stator, motor, driving assembly and vehicle

Abstract

The utility model discloses a stator iron core, a stator, a motor, a driving assembly and a vehicle. The stator iron core comprises a plurality of stator punching sheets which are sequentially laminated along the axial direction; the stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet is provided with a plurality of first through grooves which are recessed outwards along the radial direction of the stator iron core, and the outer edge surface of the first stator punching sheet is provided with a plurality of second through grooves which are recessed inwards along the radial direction of the stator iron core; the inner edge surface of the second stator punching sheet is provided with a plurality of third through grooves which are recessed outwards along the radial direction of the stator core, and the third through grooves are partially communicated with the first through grooves and partially communicated with the second through grooves. According to the technical scheme of the utility model, the cooling liquid of the motor can enter the third through groove from the second through groove, enters the stator groove through the third through groove, and directly sprays the winding arranged in the stator groove. Compared with the arrangement of a cooling flow channel, the stator core structure provided by the utility model can enable the cooling liquid to be in direct contact with the winding, and the cooling effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of stator cores, and in particular to a stator core, a stator, a motor, a drive assembly and a vehicle. Background Art

[0002] When the motor is working, the winding will generate a lot of heat. This heat will accumulate in the components inside the motor and gradually increase the temperature of the components. High temperature will cause the working efficiency of the components to decrease or even partially fail, ultimately affecting the output power of the motor and generator.

[0003] In the related art, in order to cool down the motor, a cooling channel is usually provided next to the stator slot of the stator core, and the coolant flows through the cooling channel and takes away the heat of the winding in the stator slot, thereby cooling the motor. This cooling method has low cooling efficiency and cannot cope with the situation where the motor generates a lot of heat. Utility Model Content

[0004] The utility model aims to provide a stator core, a stator, a motor, a drive assembly and a vehicle, aiming to solve the problem of poor cooling capacity of the existing motor cooling system.

[0005] To achieve the purpose of the utility model, in a first aspect, the utility model provides a stator core, the stator core comprising a plurality of stator slots, the stator core comprising a plurality of stator punchings sequentially stacked in an axial direction;

[0006] The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used for coolant to enter;

[0007] The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outward along the stator core, and at least some of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least some of the third through slots are connected with the second through slots along the axial direction of the stator core.

[0008] In a possible implementation manner, a diameter of the first stator punching sheet is smaller than a diameter of the second stator punching sheet.

[0009] In a possible implementation manner, the first stator punching sheets are arranged between the second stator punching sheets.

[0010] In a possible implementation, the third through slot includes a first slot segment and a second slot segment that are connected, the first slot segment is connected to the first through slot along the axis direction of the stator core, and the second slot segment is connected to the second through slot along the axis direction of the stator core;

[0011] In the circumferential direction of the stator core, the length of the second slot segment is smaller than the length of the first slot segment.

[0012] In a possible implementation, the stator punching sheet further includes a third stator punching sheet, and the third stator punching sheet is arranged between the first stator punching sheet and the second stator punching sheet;

[0013] The inner edge surface of the third stator punching sheet has a plurality of fourth through slots that are recessed outward in the radial direction of the stator core, and at least part of the fourth through slots are connected to the first slot section and the first through slot; at least part of the fourth through slots are connected to the second slot section and the second through slot;

[0014] Compared with the third through slot, the fourth through slot is closer to the outer edge of the stator core.

[0015] In a possible implementation, the fourth through slot includes a third slot segment and a fourth slot segment that are interconnected along the radial direction of the stator core, and the third slot segment is interconnected with the first slot segment and the first through slot along the axial direction of the stator core;

[0016] The fourth slot segment is connected with the second slot segment and the second through slot along the axis direction of the stator core;

[0017] The circumferential length of the fourth slot segment along the third stator punching sheet is shorter than the circumferential length of the third slot segment along the third stator punching sheet.

[0018] In a possible implementation, a plurality of first protrusions are provided on the outer edge of the second stator punching sheet;

[0019] The outer edge of the third stator punching sheet is provided with a plurality of second protrusions corresponding to the first protrusions;

[0020] The opposing surfaces of each adjacent first protrusion and the outer edge surface of the second stator punching sheet, the opposing surfaces of each adjacent second protrusion and the outer edge surface of the third stator punching sheet together form an outer flow channel, one end of which is connected to the second through groove, and the other end is used to be connected to the liquid storage tank of the motor.

[0021] In a second aspect, the utility model further provides a stator, comprising: a stator core; and

[0022] A winding, wherein the winding is arranged in a stator slot of the stator core;

[0023] The stator core comprises a plurality of stator slots, and the stator core comprises a plurality of stator punching sheets stacked in sequence along the axial direction;

[0024] The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used to communicate with the liquid storage tank of the motor;

[0025] The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outwardly along the stator core, and at least part of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least part of the third through slots are connected with the second through slots along the axial direction of the stator core;

[0026] In a third aspect, the utility model further provides a motor, the motor comprising a stator, the stator comprising a stator core and a winding, the winding being wound in a stator slot of the stator core, the stator core comprising a plurality of stator punchings stacked in sequence along the axial direction;

[0027] The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used for coolant to enter;

[0028] The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outward along the stator core, and at least some of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least some of the third through slots are connected with the second through slots along the axial direction of the stator core.

[0029] In a fourth aspect, the utility model further provides a drive assembly, the drive assembly comprising a motor, the motor comprising a stator, the stator comprising a stator core and a winding, the winding being wound in a stator slot of the stator core, the stator core comprising a plurality of stator punchings stacked in sequence along the axial direction;

[0030] The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used for coolant to enter;

[0031] The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outward along the stator core, and at least some of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least some of the third through slots are connected with the second through slots along the axial direction of the stator core.

[0032] In a fifth aspect, the utility model further provides a vehicle, the vehicle includes a drive assembly, the drive assembly includes a motor, the motor includes a stator, the stator includes a stator core and a winding, the winding is wound in a stator slot of the stator core, and the stator core includes a plurality of stator punchings stacked in sequence along the axial direction;

[0033] The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used for coolant to enter;

[0034] The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outward along the stator core, and at least some of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least some of the third through slots are connected with the second through slots along the axial direction of the stator core.

[0035] In the technical solution of the utility model, the first stator punching sheet and the second stator punching sheet of the stator core are formed with a first through slot, a second through slot and a third through slot which are connected to each other. The first through slot and the third through slot are arranged to form a stator slot, and a winding is arranged in the stator slot. The coolant of the motor can enter the third through slot from the second through slot, and enter the stator slot through the third through slot, and directly spray the winding arranged in the stator slot. Compared with setting a cooling flow channel, the stator core structure provided by the present application can make the coolant spray directly on the winding, the coolant has a better heat dissipation effect on the winding, and the motor has higher stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A cross-sectional view of an embodiment of the motor provided by the utility model with the windings hidden;

[0038] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle stator;

[0039] Figure 3 for Figure 2 A magnified view at point A;

[0040] Figure 4 for Figure 1 A schematic diagram of a three-dimensional structure of the first stator punching sheet and the second stator punching sheet from one perspective;

[0041] Figure 5 for Figure 1 A schematic diagram of the structure of the first stator punching sheet;

[0042] Figure 6 An oil path diagram of an embodiment of a stator core provided by the utility model;

[0043] Figure 7 for Figure 1 A schematic diagram of the three-dimensional structure of the first stator punching sheet and the second stator punching sheet from another perspective;

[0044] Figure 8 for Figure 1 A schematic diagram of the structure of the second stator punching sheet;

[0045] Fig. 9 Figure 1 A schematic diagram of the three-dimensional structure of the first stator punching sheet, the second stator punching sheet and the third stator punching sheet;

[0046] Fig.10 for Fig. 9 A magnified view at position B;

[0047] Fig.11 An oil path diagram of another embodiment of the stator core provided by the utility model;

[0048] Fig.12 for Fig. 9 A schematic diagram of the structure of the third stator punching sheet;

[0049] Fig.13 for Figure 1 Schematic diagram of the three-dimensional structure of the first protrusion and the second protrusion.

[0050] Description of reference numerals:

[0051] 2000 Motor;

[0052] 1000 stator;

[0053] 100 Winding;

[0054] 200 stator core;

[0055] 1 first stator punching sheet, 11 first through slot, 12 second through slot, 121 first end, 122 second end;

[0056] 2 second stator punching sheet, 21 third through slot, 211 first slot section, 212 second slot section, 213 first protrusion;

[0057] 3 third stator punching sheet, 31 fourth through slot, 311 third slot segment, 312 fourth slot segment, 313 second protrusion;

[0058] 4 stator slots;

[0059] 5 coolant channel;

[0060] 6 outflow channel;

[0061] 300 rotor, 310 rotating shaft, 320 permanent magnet;

[0062] 400 housing, 410 mounting cavity, 420 rotor cavity. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0064] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0065] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0066] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0067] In the related art, in order to cool down the motor, a cooling channel is usually provided next to the stator slot of the stator core, and the coolant flows through the cooling channel to remove the heat of the winding in the stator slot, thereby cooling the motor. This cooling method has low cooling efficiency and cannot cope with the situation where the motor generates a lot of heat.

[0068] In order to solve the above problems, the utility model proposes a vehicle, which can be a new energy vehicle or a fuel vehicle. The vehicle can be a car, a train, or a motorcycle, and the utility model does not limit this. The vehicle includes a body, wheels, and a drive assembly. The body serves as a supporting structure of the vehicle and is used to support and connect other assemblies of the vehicle. The wheels are rotatably connected to the body, and two, three, or four wheels can be provided, and the utility model does not limit this. The drive assembly is housed in the body and is transmission-connected to the wheels. The drive assembly is used to drive the wheels to rotate, thereby driving the vehicle to move.

[0069] The drive assembly includes a motor and a transmission. The motor is the power source of the drive assembly and is used to provide power to the power assembly. One end of the transmission is connected to the motor drive, and the other end is connected to the wheel drive. The transmission is used to adjust the torque of the motor acting on the wheel, and adjust the wheel speed by adjusting the wheel torque, thereby adjusting the vehicle speed.

[0070] The vehicle also includes a condensing system, which includes a condensing device and a hydraulic device. The condensing device is used to cool the coolant, and the hydraulic device is used to control the coolant to flow in the motor, thereby cooling the motor. The coolant can be cooling oil, fluorinated coolant, or ethylene glycol, and the utility model does not limit this.

[0071] Please refer to Figure 1 The motor 2000 includes a housing 400, a stator 1000 and a rotor 300. The housing 400 is formed with a mounting cavity 410. A liquid reservoir is formed at the bottom of the housing 400. The liquid reservoir stores coolant. A condensing device is provided at the liquid reservoir to cool the coolant in the liquid reservoir.

[0072] The stator 1000 is disposed in the installation cavity 410 and fixedly connected to the cavity wall of the installation cavity 410. The stator 1000 is used to connect to an external power source to convert the electrical energy of the external power source into magnetic energy and form a first magnetic field. The stator 1000 is surrounded to form a rotor cavity 420, and the rotor 300 is disposed in the rotor cavity 420. The rotor 300 includes a rotating shaft 310 and a permanent magnet 320 disposed on the rotating shaft. The permanent magnet 320 is used to generate a second magnetic field that can interact with the first magnetic field, thereby driving the rotating shaft 310 to rotate.

[0073] Please refer to Figure 2The stator 1000 includes a stator core 200 and a winding 100. The stator core is formed with stator slots, and the winding is wound in the stator slots. The winding is used to connect to an external power source to convert the electrical energy of the external power source into magnetic energy and generate a first magnetic field.

[0074] Please refer to Figures 3 to 5 The stator core 200 includes a plurality of stator punching sheets stacked in sequence along the axial direction; the stator punching sheets include a first stator punching sheet 1 and a second stator punching sheet 2, and the first stator punching sheet 1 and the second stator punching sheet 2 are made of silicon steel to ensure that the first stator punching sheet 1 and the second stator punching sheet 2 can be insulated from each other.

[0075] The inner edge surface of the first stator punching sheet 1 has a plurality of first through grooves 11 which are recessed radially outward along the stator core 200, and the outer edge surface of the first stator punching sheet 1 has a plurality of second through grooves 12 which are recessed radially inward along the stator core 200. The second through grooves 12 have a first end 121 close to the outer edge of the stator core 200 and a second end 122 away from the outer edge of the stator core 200. The first end 121 of the second through groove 12 is connected to the liquid storage tank. The second end 122 of the second through groove 12 is connected to the stator slot 4 formed by the first through groove 11 and the third through groove 21. The coolant in the liquid storage tank can flow into the stator core 200 from the second through groove 12. The inner edge surface of the second stator punching sheet 2 has a plurality of third through slots 21 that are recessed radially outward along the stator core 200, and at least part of the third through slots 21 are connected to the first through slots 11 along the axial direction of the stator core 200 to form stator slots 4; at least part of the third through slots 21 are connected to the second through slots 12 along the axial direction of the stator core 200.

[0076] Please refer to Figure 6 In the technical solution of the utility model, the coolant in the liquid storage tank can enter the stator core 200 through the first end 121 of the second through slot 12 under the drive of the hydraulic device, and then enter the stator slot 4 through the second end 122 of the second through slot 12, and directly spray on the winding 100. In this way, the cooling effect of the coolant on the winding 100 is improved, thereby improving the operating stability of the motor 2000.

[0077] The coolant sprayed on the winding 100 will return to the liquid storage tank for cooling under the action of gravity, and the cooled coolant will enter the stator slot driven by the hydraulic device, thereby realizing the cooling cycle of the motor 2000.

[0078] The first stator sheet 1 can be arranged at the bottom of the second stator sheet 2, or at the top of the second stator sheet 2. The present invention does not limit this. In one embodiment of the present invention, the first stator sheet 1 is arranged between the second stator sheets 2. It is particularly preferred that the number of second stator sheets 2 on both sides of the first stator sheet 1 is consistent, thereby ensuring that the first stator sheet 1 can be located in the middle of the stator core 200. In this way, it is ensured that the coolant can enter the stator slot 4 from the middle of the stator core 200, thereby reducing the time for the coolant to pass through the winding 100 and improving the cooling efficiency of the coolant for the winding 100. On the second aspect, arranging the first stator sheet 1 in the middle of the stator core 200 can also ensure that the temperature difference of the coolant from contacting the winding 100 to leaving the winding 100 is not too large, and ensure the uniformity of the cooling of the cooling liquid for each part of the winding 100.

[0079] Please refer to Figure 7 In one embodiment of the present invention, the diameter of the first stator punching sheet 1 is smaller than the diameter of the second stator punching sheet 2, so that a cooling liquid channel 5 is formed on the surface of the stator core 200 and is recessed in the radial direction of the stator core 200. It can be understood that before the cooling liquid channel 5 is provided, the hydraulic device needs to be provided with multiple hydraulic units, which can be oil pipelines or other oil circuit structures, in order to deliver the hydraulic oil to different second through grooves 12. After the cooling liquid channel 5 is provided, the coolant can be transported to the cooling liquid channel 5 through a hydraulic unit, and then diffused to each second through groove 12 through the cooling liquid channel, so that the coolant enters the second through groove 12. In this way, the number of wiring of the hydraulic device is reduced, and the manufacturing cost of the motor 2000 is reduced.

[0080] Please refer to Figure 4 and Figure 8 In one embodiment of the present invention, the third through slot 21 includes a first slot section 211 and a second slot section 212 that are connected to each other. The first slot section 211 is connected to the first through slot 11 along the axial direction of the stator core 200, and then forms the stator slot 4 of the stator core 200 with the first through slot 11; the second slot section 212 is connected to the second end 122 of the second through slot 12 along the axial direction of the stator core 200, and then the coolant can enter the stator slot 4 through the second through slot 12. Since the second slot section 212 is only used to connect the stator slot 4 and the second through slot 12, the length of the second slot section 212 is less than the length of the first slot section 211 in the circumferential direction of the stator core 200. In this way, while ensuring that the second through slot 12 and the stator slot 4 can be connected along the axial direction of the stator core 200, the area of ​​the third through slot 21 can be reduced, thereby reducing the influence of the third through slot 21 on the magnetic flux of the second stator punching sheet 2.

[0081] To further reduce the effect of stator lamination slotting on the magnetic flux of the stator core 200, please refer to Fig. 9 In another possible implementation manner of the present invention, the stator punching sheet further includes a third stator punching sheet 3 , and the third stator punching sheet 3 is arranged between the first stator punching sheet 1 and the second stator punching sheet 2 .

[0082] Please refer to Fig.10 The inner edge surface of the third stator punching sheet 3 has a plurality of fourth through slots 31 which are recessed radially outwardly along the stator core 200, and at least part of the fourth through slots 31 are connected with the first slot section 211 and the first through slot 11; at least part of the fourth through slots 31 are connected with the second slot section 212 and the second through slot 12, and compared with the third through slots 21, the fourth through slots 31 are closer to the outer edge of the stator core 200.

[0083] Please refer to Fig.11 After the coolant reaches the second through groove 12, it will first pass through the fourth through groove 31 and then enter the stator slot 4. Since there is the fourth through groove 31 as a transition, the third through groove 21 can be indirectly connected to the second through groove 12 through the fourth through groove 31 instead of being directly connected to the second through groove 12, thereby reducing the radial length of the third through groove 21, thereby reducing the setting of the third through groove 21, and damaging the magnetic flux of the second stator punching sheet 2, thereby reducing the influence of the third through groove 21 on the output power of the motor 2000.

[0084] Please refer to Figures 10 to 12 In another embodiment of the present invention, the fourth through slot 31 includes a third slot section 311 and a fourth slot section 312 that are interconnected along the radial direction of the stator core 200. The third slot section 311 is interconnected with the first slot section 211 and the first through slot 11 along the axial direction of the stator core 200, so that the third slot section 311, together with the first slot section 211 and the first through slot 11, constitutes the stator slot 4 of the stator core 200; the fourth slot section 312 is interconnected with the second slot section 212 and the second through slot 12 along the axial direction of the stator core 200, so that the coolant can enter the stator slot 4 through the fourth slot section 312. Since the fourth slot section 312 is only used to connect the stator slot 4, the circumferential length of the fourth slot section 312 along the third stator punching sheet 3 in the circumferential direction of the stator core 200 is shorter than the circumferential length of the third slot section 311 along the third stator punching sheet 3. In this way, while ensuring that the fourth through slot 31 and the stator slot 4 can be connected along the axial direction of the stator core 200, the area of ​​the fourth through slot 31 can be reduced, thereby reducing the influence of the fourth through slot 31 on the magnetic flux of the third stator punching sheet 3.

[0085] The number of the first stator sheet 1, the second stator sheet 2 and the third stator sheet 3 can be one, two or three, and the utility model does not limit this. It can be understood that the area of ​​the first through slot and the second through slot in the first stator sheet 1 is larger than the area of ​​the fourth through slot in the third stator sheet 3, and larger than the area of ​​the third through slot in the second stator sheet 2. Therefore, for the loss of magnetic flux, the first stator sheet 1 should be larger than the third stator sheet 3 and larger than the second stator sheet 2.

[0086] In order to minimize the influence of the through slot on the stator punching sheet, in one embodiment of the utility model, the second stator punching sheet 2 with the smallest magnetic flux loss is used as the main body of the stator core 200 and is distributed throughout the stator core 200; the first stator punching sheet 1 is arranged in the middle of the second stator punching sheet 2, and the number of the first stator punching sheet 1 can be one sheet or two sheets. When the number of the first stator punching sheet 1 is set to one sheet, the loss of the magnetic flux of the stator core 200 by the first stator punching sheet 1 can be reduced. In one embodiment of the utility model, the number of the first stator punching sheet 1 is arranged as two sheets to increase the space of the cooling liquid channel 5, thereby increasing the speed at which the coolant can enter the stator core 200 and improving the cooling efficiency; the third stator punching sheet 3 is arranged in two sheets, and is respectively arranged between the first stator punching sheet 1 and the second stator punching sheet 2 to reduce the length of the third through slot 21 along the second stator punching sheet 2, so as to minimize the magnetic flux loss of the stator core 200.

[0087] Please refer to Figure 1 and Fig.13 In one embodiment of the utility model, the outer edge of the second stator sheet 2 is provided with a plurality of first protrusions 213; the outer edge of the third stator sheet 3 is provided with a plurality of second protrusions 313 corresponding to the first protrusions 213; the opposite surfaces of each adjacent first protrusion 213 and the outer edge surface of the second stator sheet 2, the opposite surfaces of each adjacent second protrusion 313 and the outer edge surface of the third stator sheet 3 together form an outer flow channel 6, one end of the outer flow channel 6 is connected to the second through groove 12, and the other end is used to communicate with the liquid storage tank of the motor 2000. In this embodiment, the coolant in the liquid storage tank can be sent into the second through groove 12 through the outer flow channel 6, so as to save the process of laying oil pipelines outside the stator core 200, reduce the manufacturing and assembly costs of the motor 2000, and improve the assembly efficiency.

[0088] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0089] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A stator core, comprising a plurality of stator slots, characterized in that: The stator core comprises a plurality of stator punching sheets stacked in sequence along the axial direction; The stator punching sheet comprises a first stator punching sheet and a second stator punching sheet, the inner edge surface of the first stator punching sheet has a plurality of first through grooves recessed radially outwardly along the stator core, the outer edge surface of the first stator punching sheet has a plurality of second through grooves recessed radially inwardly along the stator core, and the second through grooves are used for coolant to enter; The inner edge surface of the second stator punching sheet has a plurality of third through slots recessed radially outward along the stator core, and at least some of the third through slots are connected with the first through slots along the axial direction of the stator core to form the stator slots; at least some of the third through slots are connected with the second through slots along the axial direction of the stator core.

2. The stator core according to claim 1, characterized in that: The diameter of the first stator punching sheet is smaller than the diameter of the second stator punching sheet.

3. The stator core according to claim 1, characterized in that: The first stator punching sheets are arranged between the second stator punching sheets.

4. The stator core according to any one of claims 1 to 3, characterized in that: The third through slot includes a first slot section and a second slot section which are connected to each other, wherein the first slot section is connected to the first through slot along the axis direction of the stator core, and the second slot section is connected to the second through slot along the axis direction of the stator core; In the circumferential direction of the stator core, the length of the second slot segment is smaller than the length of the first slot segment.

5. The stator core according to claim 4, characterized in that: The stator punching sheet further includes a third stator punching sheet, and the third stator punching sheet is arranged between the first stator punching sheet and the second stator punching sheet; The inner edge surface of the third stator punching sheet has a plurality of fourth through slots that are recessed outward in the radial direction of the stator core, and at least part of the fourth through slots are connected to the first slot section and the first through slot; at least part of the fourth through slots are connected to the second slot section and the second through slot; Compared with the third through slot, the fourth through slot is closer to the outer edge of the stator core.

6. The stator core according to claim 5, characterized in that: The fourth through slot includes a third slot segment and a fourth slot segment that are interconnected along the radial direction of the stator core, and the third slot segment is interconnected with the first slot segment and the first through slot along the axial direction of the stator core; The fourth slot segment is connected with the second slot segment and the second through slot along the axis direction of the stator core; The circumferential length of the fourth slot segment along the third stator punching sheet is shorter than the circumferential length of the third slot segment along the third stator punching sheet.

7. The stator core according to claim 5, characterized in that: The outer edge of the second stator punching sheet is provided with a plurality of first protrusions; The outer edge of the third stator punching sheet is provided with a plurality of second protrusions corresponding to the first protrusions; The opposing surfaces of each adjacent first protrusion and the outer edge surface of the second stator punching sheet, the opposing surfaces of each adjacent second protrusion and the outer edge surface of the third stator punching sheet together form an outer flow channel, one end of which is connected to the second through groove, and the other end is used to be connected to the liquid storage tank of the motor.

8. A stator, characterized in that: include: The stator core according to any one of claims 1 to 7; and The winding is arranged in the stator slot of the stator core.

9. A motor, characterized in that: Comprising a stator as claimed in claim 8.

10. A drive assembly, characterized in that: Comprising the motor as claimed in claim 9.

11. A vehicle, characterized in that: Comprising the drive assembly as claimed in claim 10.

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