Stator assembly, motor with stator assembly, power assembly and vehicle

Abstract

The invention provides a stator assembly, a motor with the stator assembly, a power assembly with the stator assembly and a vehicle. The winding is wound on the stator iron core, and one part of the winding exceeds the stator iron core in the axial direction of the stator iron core so as to form a winding end part of the winding; a cooling cavity is defined by the oil collecting ring, the oil collecting ring is provided with a first inlet and outlet and a second inlet and outlet which are communicated with the cooling cavity, one of the first inlet and outlet and the second inlet and outlet is an inlet of the cooling cavity, and the other one is an outlet of the cooling cavity; at least one of the first inlet and outlet and the second inlet and outlet is located on the side, facing the stator iron core, of the oil collecting ring. According to the stator assembly provided by the invention, the first inlet / outlet or the second inlet / outlet is arranged between the oil collecting ring and the stator iron core, and the cooling medium can fully infiltrate the part between the winding and the stator iron core and then flow to the first inlet / outlet or the second inlet / outlet, so that the stable operation of the stator assembly can be ensured, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a stator assembly, a motor and a vehicle having the same. Background Art

[0002] In the motor of the existing scheme, the coolant simply soaks the winding in the cooling cavity of the oil collecting ring, resulting in the coolant being unable to fully exchange heat between the winding and the stator core, which can easily lead to failure of the stator assembly and instability of stable operation, thereby reducing the service life of the motor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a stator assembly, which can increase the service life of the motor.

[0004] The present invention also provides a motor having the stator assembly.

[0005] The present invention also provides a power assembly having the motor.

[0006] The present invention also provides a vehicle having the power assembly.

[0007] According to a stator assembly of an embodiment of the first aspect of the present invention, the stator assembly includes: a stator core; a winding, the winding is wound on the stator core, a part of the winding exceeds the stator core along the axial direction of the stator core to form a winding end of the winding; an oil collecting ring, the oil collecting ring is arranged on at least one side of the axial direction of the stator core, the oil collecting ring defines a cooling cavity, the opening of the cooling cavity faces the stator core, the winding end is arranged in the cooling cavity, the oil collecting ring has a first inlet and a second inlet and a second inlet respectively connected to the cooling cavity, one of the first inlet and the second inlet is the inlet of the cooling cavity and the other is the outlet of the cooling cavity, and at least one of the first inlet and the second inlet is located on the side of the oil collecting ring facing the stator core.

[0008] According to the stator assembly of the present invention, a first inlet and outlet or a second inlet and outlet is set between the oil collecting ring and the stator core, and the cooling medium can fully infiltrate the area between the winding and the stator core and then flow to the first inlet and outlet or the second inlet and outlet, so that the winding end of the winding and the end face of the stator core can be fully exchanged with heat, thereby ensuring that the stator assembly can operate stably and at the same time, the service life of the motor can be improved.

[0009] According to some embodiments of the present invention, at least one of the first inlet and outlet and the second inlet and outlet is formed on the oil collecting ring and / or the stator core, or at least one of the first inlet and outlet and the second inlet and outlet is formed between the oil collecting ring and the stator core.

[0010] According to some embodiments of the present invention, the oil collecting ring and / or the stator core forms a first flow channel, one end of the first flow channel is connected to the external space of the stator assembly, and the other end of the first flow channel is formed as the first inlet and outlet or the second inlet and outlet located on the side of the oil collecting ring facing the stator core.

[0011] According to some embodiments of the present invention, a groove is formed on an end surface of the oil collecting ring facing the stator core, and the first flow channel is surrounded by an inner wall of the groove and an end surface of the stator core.

[0012] According to some embodiments of the present invention, the groove extends in a radial direction of the oil collecting ring.

[0013] According to some embodiments of the present invention, there are a plurality of the first inlet and outlet or the second inlet and outlet formed on the side of the oil collecting ring facing the stator core, and the first inlet and outlet are arranged at intervals along the circumference of the oil collecting ring.

[0014] According to some embodiments of the present invention, the oil collecting ring includes: an outer plate, which extends in a ring shape along the circumference of the stator core; an inner plate, which extends in a ring shape along the circumference of the stator core, and the inner plate is arranged on the inner side of the outer plate and is arranged with radial intervals along the stator core; a connecting plate, which extends in a ring shape along the circumference of the stator core, and the connecting plate is arranged on the side of the outer plate and the inner plate away from the stator core and extends radially along the stator core, the outer plate is connected to the radial outer peripheral edge of the connecting plate, and the inner plate is connected to the radial inner peripheral edge of the connecting plate, and the connecting plate, the outer plate and the inner plate define the cooling cavity.

[0015] According to some optional embodiments of the present invention, the first inlet and outlet are provided on the outer plate and penetrate the outer plate along the radial direction of the stator core.

[0016] According to some optional embodiments of the present invention, the oil collecting ring further defines a liquid inlet cavity, which is formed on the radially outer side of the outer plate, and is connected to the cooling cavity through the first inlet and outlet, and a through hole connected to the liquid inlet cavity is formed on the oil collecting ring, and the through hole is connected to the outside.

[0017] According to some optional embodiments of the present invention, the liquid inlet cavity extends in a ring shape along the circumference of the outer plate, and there are multiple first inlets and outlets, which are arranged at intervals in the circumference of the outer plate.

[0018] According to some embodiments of the present invention, the oil collecting ring further includes: a first plate and a second plate, the first plate and the second plate are both connected to the outer plate and extend radially outwardly of the stator core, the first plate and the second plate are both extended in a ring shape along the circumference of the stator core, and the first plate is arranged on a side of the second plate that is away from the stator core in the axial direction of the stator core, wherein the first plate, the second plate and the outer plate cooperate to define the liquid inlet cavity, the side of the liquid inlet cavity that is away from the outer plate is open, and the open side of the liquid inlet cavity is suitable for being closed by a casing.

[0019] According to some optional embodiments of the present invention, the second plate is provided with a through hole that penetrates the second plate along the axial direction of the stator core, and a cooling channel is provided in the stator core. The cooling channel extends along the axial direction of the stator core, and the inlet end of the cooling channel is connected to the outside and the outlet end is connected to the through hole.

[0020] According to some optional embodiments of the present invention, there are multiple cooling channels, and the multiple cooling channels are arranged at intervals along the circumference of the stator core.

[0021] According to some embodiments of the present invention, a liquid inlet groove is formed on the outer peripheral surface of the stator core, the opening of the liquid inlet groove is suitable for communicating with the outside, and the inlet end of the cooling channel passes through the side wall of the liquid inlet groove.

[0022] According to some optional embodiments of the present invention, the liquid inlet groove is formed by being recessed inwardly from the outer surface of the stator core along the radial direction of the stator core.

[0023] According to some embodiments of the present invention, the liquid inlet groove extends in a ring shape along the circumference of the stator core.

[0024] According to some embodiments of the present invention, a projection of the panel assembly along the front-to-back direction is a rectangle.

[0025] According to some optional embodiments of the present invention, the liquid inlet groove is arranged at a middle position of the stator core in the axial direction, and there are multiple cooling channels, which are respectively arranged on both sides of the liquid inlet groove.

[0026] According to some embodiments of the present invention, the winding has two winding ends, which are respectively located at two axial ends of the stator core, and the number of the oil collecting rings is two, which are symmetrically arranged in the axial direction of the stator core.

[0027] The motor according to the second aspect of the present invention comprises the stator assembly according to the first aspect of the present invention.

[0028] According to the motor of the present invention, by setting the stator assembly of the first embodiment above, a first inlet and outlet or a second inlet and outlet is set between the oil collecting ring and the stator core. The cooling medium can fully wet the area between the winding and the stator core and then flow to the first inlet and outlet or the second inlet and outlet, so that the winding end of the winding and the end face of the stator core can be fully exchanged with heat, thereby ensuring that the stator assembly can operate stably and at the same time, the service life of the motor can be improved.

[0029] According to some embodiments of the present invention, the motor further includes: a casing, on which an oil inlet and an oil drain are formed; the stator assembly is disposed in the casing, the oil inlet is connected to the first inlet and outlet through a liquid inlet groove and a cooling channel of the stator assembly, and the second inlet and outlet is connected to the oil drain.

[0030] According to some embodiments of the present invention, the housing is formed with a drainage channel, the drainage channel extends in a ring shape along the circumference of the stator core, and the liquid outlet channel is communicated with the oil drain port through the drainage channel.

[0031] According to some optional embodiments of the present invention, the casing includes: a main body, the main body defines an installation cavity, the stator assembly is arranged in the installation cavity; a baffle, the baffle is connected to the main body and is located in the installation cavity, the baffle extends in a ring shape along the circumference of the stator core, the baffle extends toward the oil collecting ring along the axial direction of the stator core, the baffle cooperates with the main body to define the drainage channel located radially outside the baffle, the drainage channel is open on one side facing the oil collecting ring, and the oil collecting ring covers the open side of the drainage channel.

[0032] A powertrain according to an embodiment of the third aspect of the present invention comprises the motor according to the second aspect of the present invention.

[0033] A vehicle according to an embodiment of a fourth aspect of the present invention comprises a motor according to the second aspect of the present invention or a powertrain according to the third aspect of the present invention.

[0034] According to the vehicle of the present invention, by setting the powertrain of the third embodiment or the motor of the second embodiment, the stator assembly of the first embodiment is set on the motor, and the first inlet and outlet or the second inlet and outlet is set between the oil collecting ring and the stator core. The cooling medium can fully wet the area between the winding and the stator core and then flow to the first inlet and outlet or the second inlet and outlet, so that the winding end of the winding and the end face of the stator core can be fully exchanged with heat, thereby ensuring that the stator assembly can operate stably and at the same time, the service life of the motor can be improved.

[0035] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of a motor according to an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0038] Figure 3 yes Figure 1 A schematic diagram of an oil collecting ring at an angle shown in FIG.

[0039] Figure 4 yes Figure 3 A schematic diagram of the oil collecting ring at another angle shown in FIG.

[0040] Figure 5 yes Figure 1 Schematic diagram of the housing shown in .

[0041] Reference numerals:

[0042] 100. stator assembly;

[0043] 10. Stator core; 11. Cooling channel; 12. Liquid inlet tank;

[0044] 20. Winding; 21. Winding end;

[0045] 30. Oil collecting ring; 31. Outer plate; 311. First inlet and outlet; 32. Inner plate; 33. Connecting plate; 34. First plate; 35. Second plate; 351. Through hole; 36. Cooling cavity; 37. Liquid inlet cavity; 38. Second inlet and outlet; 39. First flow channel;

[0046] 200, housing; 210, body; 2101, oil inlet; 2102, oil drain; 220, baffle; 230, drainage channel;

[0047] 1000. Motor. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0049] Please refer to the following Figure 1-5 A stator assembly 100 according to an embodiment of the present invention is described.

[0050] Reference Figure 1 , Figure 2 , Figure 3 and Figure 5 According to the stator assembly 100 of the first embodiment of the present invention, the stator assembly 100 includes: a stator core 10, a winding 20 and an oil collecting ring 30.

[0051] Specifically, the winding 20 is wound on the stator core 10, and a portion of the winding 20 extends beyond the stator core 10 in the axial direction of the stator core 10 to form a winding end 21 of the winding 20; the oil collecting ring 30 is arranged in the axial direction of the stator core 10 (such as Figure 1 That is, the oil collecting ring 30 can be arranged on one side of the axial direction of the stator core 10, or on both sides of the axial direction of the stator core 10. The oil collecting ring 30 defines a cooling chamber 36 opening toward the stator core 10, and the cooling chamber 36 has a first entrance and exit 311 and a second entrance and exit 38. One of the first entrance and exit 311 and the second entrance and exit 38 is the inlet of the cooling chamber 36 and the other is the outlet of the cooling chamber 36. That is, the first entrance and exit 311 can be the inlet of the cooling chamber 36 and the second entrance and exit 38 can be the outlet of the cooling chamber 36, or the second entrance and exit 38 can be the inlet of the cooling chamber 36 and the first entrance and exit 311 can be the outlet of the cooling chamber 36. At least one of the first entrance and exit 311 and the second entrance and exit 38 is located on the side of the oil collecting ring 30 facing the stator core 10.

[0052] For example, Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the left and right ends of the winding 20 both extend beyond the stator core 10, and the ends of the winding 20 are formed as winding ends 21. The oil collecting ring 30 can be arranged on the left or right side of the stator core 10. The oil collecting ring 30 can also be arranged on the left and right sides of the stator core 10. The first entrance and exit 311 can be connected to the cooling chamber 36, and the second entrance and exit 38 can be connected to the cooling chamber 36 and the external space.

[0053] When the stator assembly 100 is running, the stator core 10 will generate heat due to long-term operation. At this time, the cooling medium flows from the outside of the stator assembly 100 to the cooling chamber 36 through the first entrance and exit 311. The cooling medium can be a coolant, a gas or a phase change material. The cooling medium flows in the cooling chamber 36, and can exchange heat with the winding end 21 of the winding 20 and the end face of the stator core 10, such as the winding end 21 at the left end of the winding 20 and the left end face of the stator core 10. After the cooling medium completes the heat exchange with the winding end 21 and the stator core 10, the cooling medium flows from the cooling chamber 36 to the second entrance and exit 38, and finally flows to the external space through the second entrance and exit 38.

[0054] In the stator assembly 100 of the present invention, a first inlet and outlet 311 or a second inlet and outlet 38 is provided between the oil collecting ring 30 and the stator core 10. In the process of the cooling medium flowing from the cooling chamber 36 to the first inlet and outlet 311 or the second inlet and outlet 38, since the first inlet and outlet 311 or the second inlet and outlet 38 is provided between the oil collecting ring 30 and the stator core 10, the cooling medium needs to fully infiltrate the area between the winding 20 and the stator core 10 before flowing to the first inlet and outlet 311 or the second inlet and outlet 38, so that the winding end 21 of the winding 20 and the end surface of the stator core 10 can be fully heat exchanged, especially the part of the winding end 21 near the stator core 10 can be fully heat exchanged, which can have It can effectively prevent the local temperature of the winding 20 and the stator core 10 from being too high, ensure the uniformity of heat exchange between the winding 20 and the stator core 10, and further ensure that the stator assembly 100 can operate stably. At the same time, compared with the prior art solution of simply soaking the winding 20 in the cooling cavity 36, the cooling medium of the present application can be disturbed during the process of flowing from the cooling cavity 36 to the first entrance and exit 311 or the second entrance and exit 38, thereby improving the fluidity of the cooling medium in the cooling cavity 36, and thus further improving the heat exchange effect of the cooling medium on the stator assembly 100, thereby ensuring that the stator assembly 100 can operate stably under suitable working conditions, and effectively improving the service life of the motor 1000.

[0055] According to the stator assembly 100 of the embodiment of the present invention, a first inlet and outlet 311 or a second inlet and outlet 38 is set between the oil collecting ring 30 and the stator core 10. The cooling medium can fully wet the area between the winding 20 and the stator core 10 and then flow to the first inlet and outlet 311 or the second inlet and outlet 38, so that the winding end 21 of the winding 20 and the end face of the stator core 10 can be fully exchanged with heat, thereby ensuring that the stator assembly 100 can operate stably and at the same time, the service life of the motor 1000 can be improved.

[0056] According to some embodiments of the present invention, referring to Figure 2 and Figure 3At least one of the first inlet and outlet 311 and the second inlet and outlet 38 is formed on the oil collecting ring 30 and / or the stator core 10. Therefore, the first inlet and outlet 311 and the second inlet and outlet 38 can be set according to actual needs, so that the arrangement of the first inlet and outlet 311 and the second inlet and outlet 38 can be facilitated.

[0057] Furthermore, if Figure 2 and Figure 3 As shown, at least one of the first inlet and outlet 311 and the second inlet and outlet 38 is formed between the oil collecting ring 30 and the stator core 10. Thus, it can be ensured that the cooling medium flowing into the cooling cavity 36 can flow out of the cooling cavity 36 only after fully soaking the first end 21, thereby ensuring the cooling effect of the cooling medium on the first end 21 and the end surface of the stator core 10.

[0058] For example, Figure 2 and Figure 3 As shown, the first inlet and outlet 311 is formed on the oil collecting ring 30 , and the second inlet and outlet 38 is formed between the oil collecting ring 30 and the stator core 10 .

[0059] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The oil collecting ring 30 and / or the stator core 10 are formed with a first flow channel 39, one end of the first flow channel 39 is connected to the external space of the stator assembly 100, and the other end of the first flow channel 39 is formed as a first inlet and outlet 311 or a second inlet and outlet 38 located on the side of the oil collecting ring 30 facing the stator core 10. Thus, the first inlet and outlet 311, the first flow channel 39 and the second inlet and outlet 38 form a connected circulating cooling channel, so that the cooling medium can flow out of the cooling cavity 36 after the heat exchange between the winding 20 and the stator core 10 is completed, and the heat exchange effect of the cooling medium on the stator assembly 100 can be ensured.

[0060] For example, Figure 2 and Figure 3 As shown, one end of the first flow channel 39 is in communication with the external space of the stator assembly 100 , and the other end of the first flow channel 39 is formed as a second inlet and outlet 38 .

[0061] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The oil collecting ring 30 has a groove on one end surface facing the stator core 10, and the first flow channel 39 is formed by the inner wall of the groove and the end surface of the stator core 10. Therefore, the first flow channel 39 is reasonably arranged and does not occupy the arrangement space of the stator core 10, so that the arrangement of the stator core 10 can be facilitated. At the same time, compared with the solution of arranging the first flow channel 39 on the stator core 10, arranging the first flow channel 39 on the oil collecting ring 30 is easier to process, so that the arrangement of the second inlet and outlet 38 can be facilitated, and the production time of the stator assembly 100 can be saved.

[0062] For example, Figure 2 and Figure 3 As shown, taking the oil collecting ring 30 on the left side of the stator core 10 as an example, the right end surface of the oil collecting ring 30 is recessed to the left to form a groove, and the groove wall and the left end surface of the stator core enclose a first flow channel 39. The oil collecting ring 30 on the right side of the stator core 10 and the oil collecting ring 30 on the left side of the stator core 10 are symmetrically arranged in the left-right direction.

[0063] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the groove extends in the radial direction of the oil collecting ring 30. Thus, the total length of the first flow channel 39 can be reduced, thereby reducing the flow distance of the cooling medium in the first flow channel 39 and reducing the flow time.

[0064] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 , the number of the first inlet and outlet 311 or the second inlet and outlet 38 formed on the side of the oil collecting ring 30 facing the stator core 10 is multiple, that is, the number of the first inlet and outlet 311 or the second inlet and outlet 38 can be two, three or four or more, and they are arranged at intervals along the circumference of the oil collecting ring 30. Therefore, the multiple first inlet and outlet 311 or the second inlet and outlet 38 can increase the speed of the cooling medium flowing out from the first inlet and outlet 311 or the second inlet and outlet 38, thereby increasing the circulation speed of the cooling medium, and further increasing the heat exchange effect on the stator core 10 and the winding 20. At the same time, the uniformly distributed first inlet and outlet 311 or the second inlet and outlet 38 can ensure the uniformity of the cooling medium flowing out of the cooling cavity 36, thereby effectively avoiding the cooling medium from gathering at the port of a certain first inlet and outlet 311 or a certain second inlet and outlet 38.

[0065] For example, Figure 2 and Figure 3 As shown, there are a plurality of first inlets and outlets 311 formed on the side of the oil collecting ring 30 facing the stator core 10 , and the plurality of first inlets and outlets 311 are arranged at intervals along the circumferential direction of the oil collecting ring 30 .

[0066] According to some embodiments of the present invention, referring to Figure 2 and Figure 3The oil collecting ring 30 includes an outer plate 31, an inner plate 32 and a connecting plate 33. The outer plate 31 extends in a ring shape along the circumference of the stator core 10; the inner plate 32 extends in a ring shape along the circumference of the stator core 10, and the inner plate 32 is arranged on the inner side of the outer plate 31 and is arranged with intervals in the radial direction of the stator core 10 with the outer plate 31; the connecting plate 33 extends in a ring shape along the circumference of the stator core 10, and the connecting plate 33 is arranged on the side of the outer plate 31 and the inner plate 32 away from the stator core 10 and extends in the radial direction of the stator core 10, the outer plate 31 is connected to the radial outer peripheral edge of the connecting plate 33, and the inner plate 32 is connected to the radial inner peripheral edge of the connecting plate 33, and the connecting plate 33, the outer plate 31 and the inner plate 32 define a cooling cavity 36.

[0067] In this way, by setting the outer plate 31, the inner plate 32 and the connecting plate 33, the cooling cavity 36 can be defined, and there is no need to set up an additional cooling cavity 36, so that the arrangement of the cooling cavity 36 can be facilitated. At the same time, the cooling cavity 36 is defined in the oil collecting ring 30, and there is no need to occupy the space in the housing 200, so that the volume of the entire motor 1000 can be reduced and the overall structure of the motor 1000 can be optimized. In addition, the shape of the combination of the outer plate 31, the inner plate 32 and the connecting plate 33 is adapted to the stator core 10, so that the end surface of the oil collecting ring 30 and the stator core 10 can be closely matched, effectively ensuring the airtightness between the oil collecting ring 30 and the stator core 10, and then effectively preventing the cooling medium from flowing out from the gap between the oil collecting ring 30 and the stator core 10.

[0068] For example, Figure 2 and Figure 3 As shown, taking the oil collecting ring 30 on the left side of the stator core 10 as an example, the outer plate 31 extends in a circular ring shape along the circumferential direction of the stator core 10, the inner plate 32 extends in a circular ring shape along the circumferential direction of the stator core 10 and is arranged on the inner side of the outer plate 31, the inner plate 32 and the outer plate 31 are arranged at intervals along the radial direction of the stator core 10, the connecting plate 33 extends in a circular ring shape along the circumferential direction of the stator core 10, the connecting plate 33 is arranged at the left end of the inner plate 32 and the outer plate 31, and the connecting plate 33 The radial outer edge of the connecting plate 3 is connected to the outer plate 31, and the radial inner edge of the connecting plate 33 is connected to the inner plate 32. The outer plate 31, the inner plate 32 and the connecting plate 33 define a cooling cavity 36 which is open on the right side. The right ends of the outer plate 31 and the inner plate 32 are connected to the left end surface of the stator core 10, thereby defining a closed cooling cavity 36. The oil collecting ring 30 on the right side of the stator core 10 and the oil collecting ring 30 on the left side of the stator core 10 are symmetrically arranged in the left-right direction.

[0069] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3The first inlet and outlet 311 is provided on the outer plate 31 and penetrates the outer plate 31 along the radial direction of the stator core 10. Therefore, the first inlet and outlet 311 is provided at a reasonable position, so that the cooling medium passing through the first inlet and outlet 311 can directly pass through the outer plate 31 and enter the cooling cavity 36, thereby reducing the flow distance of the cooling medium and accelerating the circulation speed of the cooling medium in the stator assembly 100.

[0070] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The oil collecting ring 30 also defines a liquid inlet cavity 37, which is formed on the radially outer side of the outer plate 31. The liquid inlet cavity 37 is connected to the cooling cavity 36 through the first inlet and outlet 311. A through hole 351 connected to the liquid inlet cavity 37 is formed on the oil collecting ring 30, and the through hole 351 is connected to the outside. In this way, it can be ensured that the cooling medium is more evenly distributed to various parts of the cooling cavity 36, so that the problem of local overcooling or uneven cooling caused by direct injection of the cooling medium into the cooling cavity 36 can be avoided, so that more uniform and effective cooling can be achieved. At the same time, the liquid inlet cavity 37 can help control the flow speed and flow direction of the cooling medium, so that the cooling medium can better infiltrate the winding end 21 of the winding 20 and the end face of the stator core 10, thereby improving the overall cooling efficiency.

[0071] For example, Figure 2 and Figure 3 As shown, when the cooling medium circulates in the stator assembly 100, the cooling medium first flows from the outside to the through hole 351, then flows from the through hole 351 to the liquid inlet cavity 37, and then flows to the cooling cavity 36 through the first inlet and outlet 311, completing the process of the cooling medium flowing from the through hole 351 to the cooling cavity 36.

[0072] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 , the liquid inlet cavity 37 extends in an annular shape along the circumference of the outer plate 31, and the number of the first inlets and outlets 311 is multiple, that is, the number of the first inlets and outlets 311 can be two, three, or four or more, and the multiple first inlets and outlets 311 are arranged at intervals in the circumference of the outer plate 31. Thus, the annular liquid inlet cavity 37 is adapted to the annular cooling cavity 36 in the oil collecting ring 30, and the multiple first inlets and outlets 311 can ensure that the cooling medium can flow evenly from the liquid inlet cavity 37 through the first inlets and outlets 311 to the cooling cavity 36, thereby ensuring the cooling effect of the cooling medium. At the same time, the multiple first inlets and outlets 311 can also increase the flow speed of the cooling medium, thereby further improving the cooling efficiency.

[0073] For example, Figure 2 and Figure 3As shown, the radial outer side of the outer plate 31 is formed as an annular liquid inlet chamber 37, the radial inner side of the outer plate 31 is formed as an annular cooling chamber 36, and a plurality of spaced first inlets and outlets 311 are formed on the circumference of the outer plate 31, thereby ensuring that the cooling medium entering the liquid inlet chamber 37 can flow evenly to the cooling chamber 36.

[0074] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 The oil collecting ring 30 also includes: a first plate 34 and a second plate 35, both of which are connected to the outer plate 31 and extend outward in the radial direction of the stator core 10, and both of which extend in a ring shape in the circumferential direction of the stator core 10, and the first plate 34 is arranged on the side of the second plate 35 that is away from the stator core 10 in the axial direction of the stator core 10, wherein the first plate 34, the second plate 35 and the outer plate 31 cooperate to define a liquid inlet cavity 37, and the side of the liquid inlet cavity 37 that is away from the outer plate 31 is open, and the open side of the liquid inlet cavity 37 is suitable for being closed by the casing 200.

[0075] In this way, the cooperation between the first plate 34, the second plate 35 and the outer plate 31 can directly define the liquid inlet chamber 37, and there is no need to arrange the liquid inlet chamber 37 additionally, thereby facilitating the arrangement of the liquid inlet chamber 37. At the same time, the outer plate 31 serves as both the cavity wall of the liquid inlet chamber 37 and the cavity wall of the cooling chamber 36, thereby improving the functional integration of the outer plate 31. In addition, by setting a first inlet and outlet 311 on the outer plate 31 to connect the liquid inlet chamber 37 and the cooling chamber 36, the circulation of the cooling medium between the liquid inlet chamber 37 and the cooling chamber 36 can be facilitated.

[0076] For example, Figure 2 and Figure 3 As shown, taking the oil collecting ring 30 on the left side of the stator core 10 as an example, the first plate 34 and the second plate 35 are both connected to the outer plate 31 and extend radially outward of the stator core 10, the first plate 34 is arranged on the left side of the second plate 35, the radial inner ends of the first plate 34 and the second plate 35 are connected to the outer plate 31, and the radial outer ends of the first plate 34 and the second plate 35 are connected to the inner wall of the casing 200, and the first plate 34, the second plate 35, the outer plate 31 and the casing 200 define a closed liquid inlet cavity 37.

[0077] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3 The second plate 35 is provided with a plurality of Figure 1The through hole 351 of the second plate 35 (in the left and right directions shown in the figure) is penetrated, and a cooling channel 11 is provided in the stator core 10. The cooling channel 11 extends along the axial direction of the stator core 10, and the inlet end of the cooling channel 11 is connected to the outside and the outlet end is connected to the through hole 351. Therefore, the through hole 351 is arranged at a reasonable position, so that the cooling channel 11 can be conveniently connected with the liquid inlet cavity 37 through the through hole 351. At the same time, the cooling channel 11 can serve as a circulation channel for the cooling medium and can also perform heat exchange on the stator core 10, so that the functional integration of the cooling channel 11 can be improved.

[0078] For example, Figure 2 and Figure 3 As shown, taking the cooling channel 11 on the left side of the stator core 10 as an example, a through hole 351 is formed on the second plate 35 and penetrates the second plate 35 in the left-right direction, and a cooling channel 11 extending in the left-right direction is formed in the stator core 10, the right end of the cooling channel 11 is connected to the outside, and the left end of the cooling channel 11 is connected to the through hole 351.

[0079] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 2 , the number of cooling channels 11 is multiple, that is, the number of cooling channels 11 can be two, three or four or more, and the multiple cooling channels 11 are arranged at intervals along the circumference of the stator core 10. Therefore, the multiple cooling channels 11 can ensure the speed of the cooling medium flowing through the cooling channels 11 to the liquid inlet cavity 37, thereby ensuring the circulation speed of the cooling medium, and at the same time, the heat exchange efficiency of the cooling medium to the stator core 10 can be improved, thereby preventing the local overheating of the stator core 10 from affecting the performance of the stator assembly 100.

[0080] According to some embodiments of the present invention, referring to Figure 2 and Figure 3 A liquid inlet groove 12 is formed on the outer peripheral surface of the stator core 10, and the opening of the liquid inlet groove 12 is suitable for communicating with the outside, and the inlet end of the cooling channel 11 passes through the side wall of the liquid inlet groove 12. Therefore, the liquid inlet groove 12 can ensure that the cooling medium is more evenly distributed to each cooling channel 11. Since the diameter of the cooling channel 11 is small, it can avoid the cooling medium being directly injected into the cooling channel 11, which makes it difficult for the cooling medium to enter, thereby achieving a more uniform and effective flow. At the same time, the liquid inlet groove 12 can help control the flow speed and flow direction of the cooling medium, so that the cooling medium can better infiltrate the surface of the stator core 10 in the liquid inlet groove 12, thereby improving the overall cooling efficiency. In addition, the liquid inlet groove 12 can achieve communication between the outside and the cooling channel 11, so that the cooling medium can flow to the cooling channel 11 through the liquid inlet groove 12.

[0081] According to some optional embodiments of the present invention, referring to Figure 2 and Figure 3The liquid inlet groove 12 is formed by being recessed inwardly from the outer surface of the stator core 10 along the radial direction of the stator core 10. Therefore, the liquid inlet groove 12 is reasonably arranged and does not occupy the space in the motor 1000, thereby reducing the overall volume of the motor 1000 and ensuring the rationality of the structure.

[0082] According to some embodiments of the present invention, referring to Figure 1 and Figure 4 , the liquid inlet groove 12 extends in a ring shape along the circumference of the stator core 10. As a result, the cooling medium can fully infiltrate the circumference of the stator core 10 in the liquid inlet groove 12, so as to achieve the initial heat exchange of the stator core 10, thereby reducing the interval time from liquid injection to heat exchange, and effectively improving the heat exchange efficiency. At the same time, the cooling channels 11 are arranged at intervals in the circumference of the stator core 10, so that the liquid inlet groove 12 matches the cooling channels 11, so as to ensure that each cooling channel 11 is connected to the liquid inlet groove 12, and then the cooling medium can flow to the cooling channels 11 through the liquid inlet groove 12.

[0083] For example, Figure 1 and Figure 4 As shown, a liquid inlet groove 12 is formed on the outer circumference of the stator core 10 . The liquid inlet groove 12 is recessed from the outer circumference of the stator core 10 in a radially inward direction. The liquid inlet groove 12 extends in a ring shape on the outer circumference of the stator core 10 .

[0084] According to some embodiments of the present invention, referring to Figure 1 and Figure 3 The liquid inlet groove 12 is arranged at the middle position of the stator core 10 in the axial direction, and the number of cooling channels 11 is multiple, and the number of cooling channels 11 can be two, three or four or more, and the multiple cooling channels 11 are arranged on both sides of the liquid inlet groove 12. Since the middle position of the stator core 10 has the worst heat dissipation, the liquid inlet groove 12 is arranged at the middle position of the stator core 10 in the axial direction, and the cooling medium in the liquid inlet groove 12 directly exchanges heat with the distal position of the stator core 10, which can effectively avoid the local overheating of the middle position of the stator core 10 affecting the operation of the motor 1000, thereby ensuring that the motor 1000 can run for a long time and the service life of the motor 1000. At the same time, the cooling channel 11 is reasonably positioned, so that the stator core 10 can be heat exchanged in the axial direction of the entire battery core, and the heat exchange effect of the cooling medium on the stator core 10 can be further ensured.

[0085] Furthermore, by adopting the liquid inlet form of the liquid inlet groove 12 and the cooling channel 11, the axial space of the stator core 10 can be fully utilized. Compared with the solution of setting the first inlet and outlet 311 at the end of the stator core 10 in the prior art, the stator assembly 100 of the present application can reduce the height of the stator assembly 100 in the axial direction, thereby reducing the overall height of the motor 1000, ensuring the structural rationality and practicality of the motor 1000.

[0086] For example, Figure 1 and Figure 3 As shown, the liquid inlet groove 12 is disposed at the middle position of the stator core 10 in the left-right direction, and the cooling channel 11 is arranged on the left and right sides of the liquid inlet groove 12 .

[0087] According to some embodiments of the present invention, referring to Figure 1 and Figure 3 The winding 20 has two winding ends 21, which are respectively located at two axial ends of the stator core 10, and the number of the oil collecting rings 30 is two, which are symmetrically arranged in the axial direction of the stator core 10. Therefore, the two winding ends 21 of the winding 20 are heat exchanged in the cooling cavity 36 of the corresponding oil collecting ring 30, so that the high temperature damage of the winding ends 21 or the influence on the performance of the stator assembly 100 can be effectively avoided, thereby ensuring that the motor 1000 can run for a long time and the service life of the motor 1000 can be extended.

[0088] For example, Figure 1 and Figure 3 As shown, both left and right ends of the winding 20 have winding ends 21, the left winding end 21 is located in the cooling cavity 36 of the left oil collecting ring 30, and the right winding end 21 is located in the cooling cavity 36 of the right oil collecting ring 30.

[0089] According to the second aspect of the present invention, the motor 1000, Figure 1 , Figure 2 and Figure 5 , comprising a stator assembly 100 according to the first aspect of the present invention.

[0090] According to some embodiments of the present invention, referring to Figure 1 , Figure 2 and Figure 5 The motor 1000 may further include: a housing 200 and an oil inlet 2101 and an oil drain port 2102 are formed on the housing 200 ; the stator assembly 100 is disposed in the housing 200 , the oil inlet 2101 is communicated with the first inlet 311 , and the second inlet 38 is communicated with the oil drain port 2102 .

[0091] For example, Figure 1 , Figure 2 and Figure 3As shown, the oil collecting ring 30 and the casing 200 cooperate to seal the stator core 10 and the winding 20 in the casing 200, the oil inlet 2101 on the casing 200 is connected to the first inlet and outlet 311 of the stator core 10, and the oil drain port 2102 on the casing 200 is connected to the second inlet and outlet 38 between the oil collecting ring 30 and the stator core 10.

[0092] When the motor 1000 is running, the cooling medium takes the coolant as an example. The coolant flows to the liquid inlet tank 12 through the oil inlet 2101, and then flows to the liquid inlet cavity 37 through the cooling channel 11 and the through hole 351. Then, the coolant flows to the cooling cavity 36 through the first inlet and outlet 311, and then the coolant flows in the cooling cavity 36 to complete the heat exchange between the winding end 21 and the end face of the stator core 10. Then, the coolant flows to the oil drain port 2102 through the second inlet and outlet 38 to complete the circulation of the coolant in the motor 1000.

[0093] According to the motor 1000 of the present invention, by setting the stator assembly 100 according to the first aspect of the present invention, a first inlet and outlet 311 or a second inlet and outlet 38 is set between the oil collecting ring 30 and the stator core 10, and the cooling medium can fully infiltrate the area between the winding 20 and the stator core 10 and then flow to the first inlet and outlet 311 or the second inlet and outlet 38, so that the winding end 21 of the winding 20 and the end face of the stator core 10 can be fully exchanged with heat, thereby ensuring that the stator assembly 100 can operate stably, and at the same time, the service life of the motor 1000 can be improved.

[0094] According to some embodiments of the present invention, referring to Figure 1 and Figure 5 The housing 200 is formed with a drainage channel 230, which extends in a ring shape along the circumference of the stator core 10, and the second inlet and outlet 38 is connected with the oil drain port 2102 through the drainage channel 230. As a result, the cooling medium can be easily discharged from the second inlet and outlet 38 from the drainage channel 230, thereby increasing the outflow speed of the cooling medium, and further increasing the circulation speed of the cooling medium. At the same time, the drainage channel 230 is connected with multiple second inlets and outlets 38, thereby further increasing the outflow speed of the cooling medium.

[0095] According to some optional embodiments of the present invention, referring to Figure 1 and Figure 5The housing 200 includes a body 210 and a baffle 220. The body 210 defines an installation cavity, and the stator assembly 100 is disposed in the installation cavity; the baffle 220 is connected to the body 210 and is located in the installation cavity. The baffle 220 extends in a ring shape along the circumference of the stator core 10, and extends toward the oil collecting ring 30 along the axial direction of the stator core 10. The baffle 220 cooperates with the body 210 to define the drainage channel 230 located radially outside the baffle 220, and the drainage channel 230 is open on one side facing the oil collecting ring 30, and the oil collecting ring 30 covers the open side of the drainage channel 230.

[0096] In this way, the stator assembly 100 is arranged in the installation cavity, and the casing 200 and the oil collecting ring 30 can cooperate to hide the stator assembly 100 in the installation cavity, thereby preventing external dust and water vapor from entering the stator assembly 100, and thus effectively protecting the motor 1000. At the same time, the baffle 220 is reasonably arranged in a reasonable position, which can avoid the baffle 220 being arranged on the radial outer side of the main body 210, resulting in an increase in the overall volume of the motor 1000, thereby ensuring the structural rationality of the motor 1000. In addition, the baffle 220 and the main body 210 can cooperate to define the drainage channel 230, and there is no need to additionally set the drainage channel 230, thereby facilitating the arrangement of the drainage channel 230. Furthermore, the oil collecting ring 30 cooperates with the baffle 220 and the main body 210 to allow the drainage channel 230 to form a closed channel structure, thereby preventing the cooling medium from flowing out from between the oil collecting ring 30 and the casing 200.

[0097] For example, Figure 1 and Figure 5 As shown, the main body 210 extends in a ring shape along the circumference of the stator core 10, and an installation cavity of the stator assembly 100 is defined in the main body 210. The stator assembly 100 is arranged in the installation cavity. The baffle 220 extends in a ring shape along the circumference of the stator core 10 and is located on the radial inner side of the main body 210. The baffle 220 is arranged in the middle position of the left and right directions of the main body 210. The left end of the baffle 220 cooperates with the main body 210 to define a drainage channel 230 on the left side, and the right end of the baffle 220 cooperates with the main body 210 to define a drainage channel 230 on the right side. The baffle 220, the main body 210 and the oil collecting ring 30 cooperate to form a closed drainage channel 230.

[0098] According to the powertrain of the fourth aspect of the present invention, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , comprising a motor 1000 according to the second aspect of the present invention.

[0099] According to the fourth aspect of the present invention, the vehicle Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including the motor 1000 according to the second aspect of the present invention or the powertrain according to the third aspect of the present invention.

[0100] According to the vehicle of the present invention, by setting the motor 1000 of the second aspect of the present invention or the powertrain of the third aspect of the present invention, the stator assembly 100 of the first aspect of the present invention is set on the motor 1000, and the first inlet and outlet 311 or the second inlet and outlet 38 is set between the oil collecting ring 30 and the stator core 10. The cooling medium can fully wet the area between the winding 20 and the stator core 10 and then flow to the first inlet and outlet 311 or the second inlet and outlet 38, so that the winding end 21 of the winding 20 and the end face of the stator core 10 can be fully exchanged with heat, thereby ensuring that the stator assembly 100 can operate stably, and at the same time, the service life of the motor 1000 can be improved.

[0101] The following will refer to Figure 1-Figure 5 A vehicle according to a specific embodiment of the present invention is described.

[0102] Reference Figure 1 The vehicle includes a motor 1000 , and the motor 1000 includes a housing 200 and a stator assembly 100 .

[0103] The housing 200 includes: a body 210 and a baffle 220, the body 210 extends in a ring shape, a mounting cavity is defined in the body 210, the baffle 220 is connected to the body 210 and is located in the mounting cavity, the baffle 220 extends in a ring shape along the circumference of the stator core 10, the left end of the baffle 220 extends to the left, and the right end of the baffle 220 extends to the right, the baffle 220 cooperates with the body 210 to define two left and right drainage channels 230 located radially outside the baffle 220, the left side of the left drainage channel 230 is open, and the right side of the right drainage channel 230 is open. An oil inlet 2101 and an oil drain port 2102 are formed on the body 210, and the oil drain port 2102 is connected to the drainage channel 230.

[0104] The stator assembly 100 includes: a stator core 10, a winding 20 and an oil collecting ring 30. Specifically, a liquid inlet groove 12 is formed on the outer circumferential surface of the stator core 10. The liquid inlet groove 12 is formed by being recessed inward from the outer surface of the stator core 10 along the radial direction of the stator core 10. The liquid inlet groove 12 is annular and extends along the circumference of the stator core 10 and is located in the middle position of the stator core 10 in the left-right direction. The opening of the liquid inlet groove 12 is connected to the outside, and the first inlet and outlet 311 is connected to the oil inlet 2101. The stator core 10 is provided with a cooling channel 11 that penetrates the stator core 10 in the left-right direction. The inlet end of the cooling channel 11 passes through the side wall of the liquid inlet groove 12. There are multiple cooling channels 11, which are arranged at intervals along the circumference of the stator core 10. The cooling channels 11 are arranged on the left and right sides of the liquid inlet groove 12.

[0105] The winding 20 is wound on the stator core 10 , and both left and right ends of the winding 20 extend beyond the stator core 10 in the left-right direction to form winding ends 21 of the winding 20 .

[0106] There are two oil collecting rings 30, and the two oil collecting rings 30 are symmetrically arranged in the left and right directions of the stator core 10. Taking the oil collecting ring 30 on the left side of the stator core 10 as an example, the oil collecting ring 30 includes: an outer plate 31, an inner plate 32 and a connecting plate 33. The outer plate 31 extends in a ring shape along the circumference of the stator core 10; the inner plate 32 extends in a ring shape along the circumference of the stator core 10, and the inner plate 32 is arranged on the inner side of the outer plate 31 and is arranged with intervals along the radial direction of the stator core 10 with the outer plate 31; the connecting plate 33 extends in a ring shape along the circumference of the stator core 10, and the connecting plate 33 is arranged between the outer plate 31 and the connecting plate 33. The left side of the inner plate 32 extends in the radial direction of the stator core 10, the outer plate 31 is connected to the radial outer periphery of the connecting plate 33, the inner plate 32 is connected to the radial inner periphery of the connecting plate 33, the connecting plate 33, the outer plate 31 and the inner plate 32 define a cooling cavity 36 open on the right side, the winding end 21 of the winding 20 is located in the cooling cavity 36, and the connecting plate 33, the outer plate 31, the inner plate 32 and the left end surface of the stator core 10 close the open side of the cooling cavity 36. The outer plate 31 is provided with a first inlet and outlet 311, and a plurality of first inlets and outlets 311 are arranged at intervals along the circumference of the outer plate 31.

[0107] The oil collecting ring 30 further includes: a first plate 34 and a second plate 35, both of which are connected to the outer plate 31 and extend radially outwardly of the stator core 10, and both of which extend in a ring shape along the circumferential direction of the stator core 10, and the first plate 34 is arranged on the left side of the second plate 35 on the stator core 10, wherein the first plate 34, the second plate 35 and the outer plate 31 cooperate to define a liquid inlet cavity 37, and the side of the liquid inlet cavity 37 away from the outer plate 31 is open, and the open side of the liquid inlet cavity 37 is suitable for being closed by the motor 1000 housing 200. The liquid inlet cavity 37 extends in a ring shape along the circumferential direction of the outer plate 31, and the liquid inlet cavity 37 is connected to the cooling cavity 36 through the first inlet and outlet 311.

[0108] The second plate 35 is provided with a through hole 351 penetrating the second plate 35 in the left-right direction. The through hole 351 communicates with the cooling channel 11 and the liquid inlet cavity 37 .

[0109] A second inlet and outlet 38 is also provided on the second plate 35. The second inlet and outlet 38 is formed by being recessed to the left by the second plate 35. There are multiple second inlet and outlet 38, which are arranged at intervals along the circumference of the oil collecting ring 30. The second inlet and outlet 38 extends in a straight line in the radial direction of the second plate 35. The cross-section of the second inlet and outlet 38 is fan-shaped. The second inlet and outlet 38 connects the cooling chamber 36 and the drainage channel 230.

[0110] When the motor 1000 is running, the stator assembly 100 generates heat. At this time, the coolant flows from the oil inlet 2101 to the liquid inlet groove 12, and the coolant initially exchanges heat with the middle position of the stator core 10 in the liquid inlet groove 12. Then the coolant flows from the liquid inlet groove 12 to the cooling channel 11 to achieve heat exchange in the axial direction of the stator core 10. Then the coolant flows from the cooling channel 11 through the through hole 351 to the liquid inlet cavity 37. Then the coolant flows through the first inlet and outlet 311 to the cooling cavity 36. In the cooling cavity 36, the coolant exchanges heat with the winding end 21 and the end face of the stator core 10. Then the coolant flows from the cooling cavity 36 to the second inlet and outlet 38. Then the coolant flows to the drainage channel 230 through the first channel 39. Then the coolant flows from the drainage channel 230 to the oil drain port 2102. At this time, the heat exchange of the coolant inside the motor 1000 is completed.

[0111] According to the vehicle of the present invention, by setting the motor 1000 according to the second aspect of the present invention, the stator assembly 100 of the first aspect is set on the motor 1000, and the first inlet and outlet 311 or the second inlet and outlet 38 is set between the oil collecting ring 30 and the stator core 10. The cooling medium can fully infiltrate the area between the winding 20 and the stator core 10 and then flow to the first inlet and outlet 311 or the second inlet and outlet 38, so that the winding end 21 of the winding 20 and the end face of the stator core 10 can be fully exchanged with heat, thereby ensuring that the stator assembly 100 can operate stably, and at the same time, the service life of the motor 1000 can be improved.

[0112] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown 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 should not be understood as limiting the present invention.

[0113] In addition, 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0114] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0116] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A stator assembly (100), characterized in that: include: Stator core (10); A winding (20), the winding (20) being wound on the stator core (10), a portion of the winding (20) extending beyond the stator core (10) in the axial direction of the stator core (10) to form a winding end (21) of the winding (20); An oil collecting ring (30), the oil collecting ring (30) being arranged on at least one side of the stator core (10) in the axial direction, the oil collecting ring (30) defining a cooling cavity (36), the opening of the cooling cavity (36) facing the stator core (10), the winding end (21) being arranged in the cooling cavity (36), the oil collecting ring (30) having a first inlet and outlet (311) and a second inlet and outlet (38) respectively connected to the cooling cavity (36), one of the first inlet and outlet (311) and the second inlet and outlet (38) being an inlet of the cooling cavity (36) and the other being an outlet of the cooling cavity (36), and at least one of the first inlet and outlet (311) and the second inlet and outlet (38) being located on a side of the oil collecting ring (30) facing the stator core (10).

2. The stator assembly (100) according to claim 1, characterized in that: At least one of the first inlet and outlet (311) and the second inlet and outlet (38) is formed on the oil collecting ring (30) and / or the stator core (10), or at least one of the first inlet and outlet (311) and the second inlet and outlet (38) is formed between the oil collecting ring (30) and the stator core (10).

3. The stator assembly (100) according to claim 1, characterized in that: The oil collecting ring (30) and / or the stator core (10) are formed with a first flow channel (39), one end of the first flow channel (39) is connected to the external space of the stator assembly (100), and the other end of the first flow channel (39) is formed as the first inlet and outlet (311) or the second inlet and outlet (38) located on the side of the oil collecting ring (30) facing the stator core (10).

4. The stator assembly (100) according to claim 3, characterized in that: The oil collecting ring (30) is provided with a groove on one end surface facing the stator core (10), and the first flow channel (39) is formed by the inner wall of the groove and the end surface of the stator core (10).

5. The stator assembly (100) according to claim 4, characterized in that: The groove extends in the radial direction of the oil collecting ring (30).

6. The stator assembly (100) according to claim 1, characterized in that: The first inlet and outlet (311) or the second inlet and outlet (38) formed on the side of the oil collecting ring (30) facing the stator core (10) is plural in number and is arranged at intervals along the circumference of the oil collecting ring (30).

7. The stator assembly (100) according to claim 1, characterized in that: The oil collecting ring (30) comprises: An outer plate (31), the outer plate (31) extending in a ring shape along the circumference of the stator core (10); an inner plate (32), the inner plate (32) extending in a ring shape along the circumferential direction of the stator core (10), the inner plate (32) being arranged on the inner side of the outer plate (31) and being spaced apart from the outer plate (31) along the radial direction of the stator core (10); A connecting plate (33), the connecting plate (33) extending in a ring shape along the circumference of the stator core (10), the connecting plate (33) being arranged on a side of the outer plate (31) and the inner plate (32) facing away from the stator core (10) and extending in the radial direction of the stator core (10), the outer plate (31) being connected to the radial outer peripheral edge of the connecting plate (33), the inner plate (32) being connected to the radial inner peripheral edge of the connecting plate (33), the connecting plate (33), the outer plate (31) and the inner plate (32) defining the cooling cavity (36).

8. The stator assembly (100) according to claim 7, characterized in that: The first inlet and outlet (311) is provided on the outer plate (31) and penetrates the outer plate (31) along the radial direction of the stator core (10).

9. The stator assembly (100) according to claim 8, characterized in that: The oil collecting ring (30) further defines a liquid inlet cavity (37), the liquid inlet cavity (37) being formed on the radially outer side of the outer plate (31), the liquid inlet cavity (37) being connected to the cooling cavity (36) via the first inlet and outlet (311), and a through hole (351) being connected to the liquid inlet cavity (37) being formed on the oil collecting ring (30), the through hole (351) being connected to the outside.

10. The stator assembly (100) according to claim 9, characterized in that: The liquid inlet cavity (37) extends in a ring shape along the circumference of the outer plate (31), and the number of the first inlets and outlets (311) is multiple, and the multiple first inlets and outlets (311) are arranged at intervals in the circumference of the outer plate (31).

11. The stator assembly (100) according to claim 9, characterized in that: The oil collecting ring (30) further comprises: a first plate (34) and a second plate (35), wherein the first plate (34) and the second plate (35) are both connected to the outer plate (31) and extend outwardly in the radial direction of the stator core (10), the first plate (34) and the second plate (35) are both extended in a ring shape in the circumferential direction of the stator core (10), and the first plate (34) is arranged on a side of the second plate (35) that is away from the stator core (10) in the axial direction of the stator core (10), The first plate (34), the second plate (35) and the outer plate (31) cooperate to define the liquid inlet cavity (37); a side of the liquid inlet cavity (37) facing away from the outer plate (31) is open, and the open side of the liquid inlet cavity (37) is suitable for being closed by the housing (200).

12. The stator assembly (100) according to claim 11, characterized in that: The second plate (35) is provided with a through hole (351) penetrating the second plate (35) along the axial direction of the stator core (10); a cooling channel (11) is provided in the stator core (10); the cooling channel (11) extends along the axial direction of the stator core (10); an inlet end of the cooling channel (11) is connected to the outside and an outlet end is connected to the through hole (351).

13. The stator assembly (100) according to claim 12, characterized in that: The number of the cooling channels (11) is plural, and the plurality of cooling channels (11) are arranged at intervals along the circumference of the stator core (10).

14. The stator assembly (100) according to claim 12, characterized in that: A liquid inlet groove (12) is formed on the outer peripheral surface of the stator core (10), the opening of the liquid inlet groove (12) is suitable for communicating with the outside, and the inlet end of the cooling channel (11) passes through the side wall of the liquid inlet groove (12).

15. The stator assembly (100) according to claim 14, characterized in that: The liquid inlet groove (12) is formed by being recessed inwardly from the outer surface of the stator core (10) along the radial direction of the stator core (10).

16. The stator assembly (100) according to claim 14, characterized in that The liquid inlet groove (12) extends in a ring shape along the circumference of the stator core (10).

17. The stator assembly (100) according to claim 15, characterized in that The liquid inlet groove (12) is arranged at a middle position of the stator core (10) in the axial direction, and the number of the cooling channels (11) is multiple, and the multiple cooling channels (11) are respectively arranged on both sides of the liquid inlet groove (12).

18. The stator assembly (100) according to claim 1, characterized in that The winding (20) has two winding ends (21), and the two winding ends (21) are respectively located at two axial ends of the stator core (10). The number of the oil collecting rings (30) is two, and the two oil collecting rings (30) are symmetrically arranged in the axial direction of the stator core (10).

19. A motor (1000), characterized in that: The invention comprises a stator assembly (100) according to any one of claims 1 to 18.

20. The electric machine (1000) according to claim 19, characterized in that Also includes: A casing (200), wherein an oil inlet (2101) and an oil drain port (2102) are formed on the casing (200); The stator assembly (100) is arranged in the housing (200); the oil inlet (2101) is connected to the first inlet and outlet (311) through the liquid inlet groove (12) and the cooling channel (11) of the stator assembly (100); and the second inlet and outlet (38) is connected to the oil drain port (2102).

21. The electric machine (1000) according to claim 20, characterized in that The housing (200) is formed with a drainage channel (230), the drainage channel (230) extending in a ring shape along the circumference of the stator core (10), and the second inlet and outlet (38) is connected to the oil drain port (2102) through the drainage channel (230).

22. The electric machine (1000) according to claim 21, characterized in that The housing (200) comprises: A body (210), the body (210) defining a mounting cavity, the stator assembly (100) being disposed in the mounting cavity; A baffle (220), the baffle (220) is connected to the body (210) and is located in the installation cavity, the baffle (220) extends in a ring shape along the circumference of the stator core (10), the baffle (220) extends along the axial direction of the stator core (10) toward the oil collecting ring (30), the baffle (220) cooperates with the body (210) to define the drainage channel (230) located radially outside the baffle (220), the drainage channel (230) is open on one side facing the oil collecting ring (30), and the oil collecting ring (30) covers the open side of the drainage channel (230).

23. A powertrain, characterized in that: A motor (1000) comprising any one of claims 19-22.

24. A vehicle, characterized in that: Comprising the motor (1000) described in any one of claims 19 to 22 or the power assembly described in claim 23.

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