A motor stator cooling assembly, a motor and a vehicle

Abstract

The embodiment of the application relates to the technical field of vehicle part manufacturing, and discloses a motor stator cooling assembly, a motor and a vehicle. The motor stator cooling assembly comprises a shell, a stator core, a winding, a first oil storage ring and a second oil storage ring; the stator core is located in the shell, and the winding is wound on the stator core; the first oil storage ring and the second oil storage ring are respectively located at two ends of the stator core along a first direction, and the first oil storage ring and the second oil storage ring are in abutment with a side of the shell and the stator core away from the shell; the shell, the stator core, the first oil storage ring and the second oil storage ring jointly enclose a heat dissipation oil cavity, the winding is located in the heat dissipation oil cavity, the shell is provided with an oil inlet communicating with the heat dissipation oil cavity, and the first oil storage ring and / or the second oil storage ring is provided with an oil outlet communicating with the heat dissipation oil cavity. The application can uniformly contact the oil and the winding, thereby being favorable for improving the heat dissipation uniformity of the winding, improving the heat dissipation efficiency of the winding and reducing the temperature of the winding.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, and in particular to a motor stator cooling assembly, a motor, and a vehicle. Background Technology

[0002] In new energy vehicles, the electric drive system is the core powertrain. It undertakes critical tasks such as energy conversion, power output, and control, and its performance directly affects the vehicle's power, economy, comfort, and reliability. The electric drive system includes core components such as the motor, electronic control unit, and reducer. Among these, the motor, as the core power component, experiences significant heat generation in its stator core windings during operation. Overheating of the windings can significantly affect the motor's efficiency, power output, and lifespan.

[0003] In related technical solutions, in order to improve the heat dissipation capacity of the windings during motor operation, oil is usually sprayed onto the windings. Under the action of external force, the oil gradually penetrates into the windings, thereby carrying away the heat of the windings.

[0004] However, the oil distribution on the winding is not uniform in the solution using related technologies, resulting in low heat dissipation efficiency of the winding. Utility Model Content

[0005] In view of this, the present application provides a motor stator cooling assembly, a motor, and a vehicle. The present application can make the oil contact the winding evenly, thereby improving the heat dissipation uniformity of the winding, improving the heat dissipation efficiency of the winding, and reducing the temperature of the winding.

[0006] To achieve the above objectives, the technical solution of this application embodiment is implemented as follows:

[0007] This application provides a motor stator cooling assembly, including:

[0008] case;

[0009] Stator core, the stator core being located within the housing;

[0010] A winding, the winding being wound around the stator core;

[0011] The first oil storage ring is located at the first end of the stator core along the first direction, and the first oil storage ring abuts against the housing and the side of the stator core away from the housing.

[0012] The second oil storage ring is located at the second end of the stator core along the first direction, and the second oil storage ring abuts against the housing and the side of the stator core away from the housing;

[0013] The housing, stator core, first oil storage ring and second oil storage ring together form a heat dissipation oil cavity. The winding is located in the heat dissipation oil cavity. The housing is provided with an oil inlet that communicates with the heat dissipation oil cavity. The first oil storage ring and / or the second oil storage ring is provided with an oil outlet that communicates with the heat dissipation oil cavity.

[0014] In this embodiment, the housing, stator core, first oil storage ring, and second oil storage ring together form a heat dissipation oil cavity, and the winding is located inside the heat dissipation oil cavity. Oil can be injected into the heat dissipation oil cavity through the oil inlet on the housing. The oil filling the heat dissipation oil cavity can ensure uniform contact between the oil and the winding, thereby improving the heat dissipation uniformity of the winding, improving the heat dissipation efficiency of the winding, reducing the temperature of the winding, and ensuring the stability of motor operation.

[0015] In one possible implementation of this application, the first oil storage ring includes a first body and a first flange. Along the first direction, the first body abuts against the first end of the stator core, and the first flange is located at the end of the first body away from the stator core. Along the second direction, the first body is located on the side of the stator core away from the housing, and the first flange abuts against the housing.

[0016] The second oil storage ring includes a second body and a second flange. Along the first direction, the second body abuts against the second end of the stator core, and the second flange is located at the end of the second body away from the stator core. Along the second direction, the second body is located on the side of the stator core away from the housing, and the second flange abuts against the housing.

[0017] The cooling oil chamber includes a first cooling oil chamber and a second cooling oil chamber. The housing, stator core and first oil storage ring together form the first cooling oil chamber, and the housing, stator core and second oil storage ring together form the second cooling oil chamber. The cooling oil chamber is also provided with an oil channel connecting the first cooling oil chamber and the second cooling oil chamber.

[0018] Wherein, the first direction and the second direction are perpendicular to each other.

[0019] In this embodiment, a first cooling oil cavity is formed by the housing, the stator core, and the first oil storage ring, thereby cooling the winding at the first end of the stator core. A second cooling oil cavity is formed by the housing, the stator core, and the second oil storage ring, thereby cooling the winding at the second end of the stator core. The first and second cooling oil cavities are connected by oil channels to ensure that the oil can fill both cavities, thereby improving the heat dissipation efficiency of the winding and reducing the winding temperature.

[0020] In one possible implementation of this application, the oil passage includes a plurality of first axial oil passages and circumferential oil passages; the circumferential oil passages are disposed on the inner surface of the housing and are arranged along the circumference of the housing; the first axial oil passages are disposed on the outer surface of the stator core, and the plurality of first axial oil passages are spaced apart along the circumference of the stator core; the plurality of first axial oil passages are all connected to the circumferential oil passages, the first axial oil passages are connected to the first heat dissipation oil cavity and / or the second heat dissipation oil cavity, the oil inlet is connected to the circumferential oil passages, and the oil outlet is disposed away from the oil inlet.

[0021] The oil passages in this embodiment include circumferential oil passages and multiple first axial oil passages. Oil entering from the inlet can flow evenly along the circumferential oil passages to the multiple first axial oil passages, and then flow into the first and / or second cooling oil chambers through the first axial oil passages. This gradually fills the first and second cooling oil chambers, ensuring uniform contact between the oil and the windings. This improves the uniformity of heat dissipation in the windings, increases their heat dissipation efficiency, reduces their temperature, and ensures stable motor operation. By positioning the outlet further away from the inlet, the flow path and residence time of the oil within the cooling oil chambers are increased, allowing for more thorough contact between the oil and the windings, further improving the windings' heat dissipation efficiency.

[0022] In one possible implementation of this application, the first axial oil passage includes a first sub-oil passage and a second sub-oil passage, the first sub-oil passage being connected to the first cooling oil cavity, and the second sub-oil passage being connected to the second cooling oil cavity; the oil outlet includes a first oil outlet and a second oil outlet, the first oil outlet being connected to the first cooling oil cavity, and the second oil outlet being connected to the second cooling oil cavity.

[0023] In this embodiment, the first sub-oil channel connects to the first cooling oil chamber, and the second sub-oil channel connects to the second cooling oil chamber. The oil entering from the oil inlet can flow evenly along the circumferential oil channel to multiple first axial oil channels, and then flow into the first cooling oil chamber through the first sub-oil channel and into the second cooling oil chamber through the second sub-oil channel. This gradually fills the first and second cooling oil chambers with oil. After cooling is completed, the oil flows out of the first cooling oil chamber through the first oil outlet and out of the second cooling oil chamber through the second oil outlet. This ensures that the oil is in uniform contact with the winding, thereby improving the uniformity of heat dissipation of the winding, improving the heat dissipation efficiency of the winding, reducing the temperature of the winding, and ensuring the stability of motor operation.

[0024] In one possible implementation of this application, the oil passage further includes a plurality of second axial oil passages, which are disposed on the inner surface of the stator core and penetrate the stator core along the first direction, and the plurality of second axial oil passages are spaced apart along the circumferential direction of the stator core.

[0025] The first axial oil passage is connected to one of the first cooling oil chamber and the second cooling oil chamber, and the second axial oil passage is connected to both the first cooling oil chamber and the second cooling oil chamber; the oil outlet is connected to the other of the first cooling oil chamber and the second cooling oil chamber.

[0026] In this embodiment, the oil entering through the inlet can flow evenly along the circumferential oil passages to multiple first axial oil passages, and then flow into one of the first and second cooling oil chambers through the first axial oil passages. Subsequently, it enters the other of the first and second cooling oil chambers through the second axial oil passages, thereby gradually filling both chambers and ensuring uniform contact between the oil and the windings. This improves the uniformity of heat dissipation, increases the cooling efficiency of the windings, reduces the winding temperature, and ensures stable motor operation. By placing the oil outlet on the other of the first and second cooling oil chambers, the flow path and residence time of the oil within the cooling oil chamber can be increased, allowing the oil to fully contact the windings and further improving the cooling efficiency of the windings.

[0027] In one possible implementation of this application, a sealing bushing is further included. The sealing bushing includes a bushing body, a first folded edge, and a second folded edge. The first folded edge and the second folded edge are respectively located at both ends of the bushing body along the first direction. The bushing body is located inside the stator core. The first folded edge abuts against the first end of the stator core, and the second folded edge abuts against the second end of the stator core. The bushing body, the first folded edge, and the second folded edge together cover the second axial oil passage.

[0028] In this embodiment, a sealing bushing seals the second axial oil passage located on the inner surface of the stator core, ensuring that the oil in the cooling oil chamber does not leak, thus guaranteeing the cooling efficiency of the winding. Simultaneously, the sealing bushing also ensures a sufficient air gap between the stator core and the internal rotor, guaranteeing that the electromagnetic performance of the motor is not affected.

[0029] In one possible implementation of this application, a sealant layer is provided in the second axial oil passage, the sealant layer being used to seal the second axial oil passage.

[0030] In this embodiment, a sealant layer is filled into the second axial oil passage to seal it, ensuring that the oil in the heat dissipation oil chamber will not leak, thereby guaranteeing the heat dissipation efficiency of the winding.

[0031] In one possible implementation of this application, the housing is further provided with a wire outlet communicating with the heat dissipation oil cavity, and a wire outlet seal is provided at the wire outlet. The winding also includes multiple lead wires, which pass through the wire outlet seal, and at least a portion of the lead wires are located inside the heat dissipation oil cavity.

[0032] This application embodiment ensures the sealing of the heat dissipation oil chamber by setting a wire outlet seal at the outlet. By placing part of the winding lead wire inside the heat dissipation oil chamber, the oil can fully contact the lead wire to dissipate heat.

[0033] This application also provides an electric motor, including the motor stator cooling assembly as described above.

[0034] Because the motor in this embodiment of the application uses the above-mentioned electronic stator cooling assembly, the winding can be placed in the heat dissipation oil chamber, and the oil can be made to contact the winding evenly. This helps to improve the heat dissipation uniformity of the winding, improve the heat dissipation efficiency of the winding, reduce the temperature of the winding, and ensure the stability of motor operation.

[0035] This application also provides a vehicle including the motor described above.

[0036] Because the vehicle in this embodiment uses the aforementioned motor, the temperature of the motor windings can be reduced during operation, thus ensuring the stability of motor operation. Attached Figure Description

[0037] Figure 1 A simplified structural diagram of the motor stator cooling assembly provided in the embodiments of this application;

[0038] Figure 2 for Figure 1 A simplified diagram of the equivalent structure of the central cooling oil cavity;

[0039] Figure 3 A simplified structural diagram of a motor stator cooling assembly provided in another embodiment of this application;

[0040] Figure 4 for Figure 3 A simplified diagram of the equivalent structure of the central cooling oil cavity;

[0041] Figure 5 for Figure 3 A partial side view of the middle stator core;

[0042] Figure 6 A side view of the stator core and sealing bushing provided for an embodiment of this application;

[0043] Figure 7 for Figure 6 AA section view;

[0044] Figure 8 A simplified structural diagram of the stator core and windings provided in the embodiments of this application.

[0045] Figure label:

[0046] 100 - Housing; 110 - Cable outlet;

[0047] 200-Stator core;

[0048] 300 - Winding; 310 - Lead wire;

[0049] 400 - First oil storage ring; 410 - First body; 420 - First flange; 430 - First oil guide rib;

[0050] 500 - Second oil storage ring; 510 - Second body; 520 - Second flange; 530 - Second oil guide rib;

[0051] 600 - Cooling oil chamber; 601 - Oil inlet; 602 - Oil outlet; 6021 - First oil outlet; 6022 - Second oil outlet; 610 - First cooling oil chamber; 620 - Second cooling oil chamber; 630 - First axial oil passage; 631 - First sub-oil passage; 632 - Second sub-oil passage; 640 - Circumferential oil passage; 650 - Second axial oil passage;

[0052] 700 - Sealing bushing; 710 - Bushing body; 720 - First folded edge; 730 - Second folded edge;

[0053] 800 - Outgoing line seal;

[0054] X - First direction; Y - Second direction. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0056] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0057] Furthermore, in the embodiments of this application, directional terms such as "upper," "lower," "left," and "right" are defined relative to the positions in which the components are schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the position of the components in the accompanying drawings.

[0058] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can mean a fixed connection, a detachable connection, or an integral part; it can mean a direct connection or an indirect connection through an intermediate medium.

[0059] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0060] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] As described in the background section, related technologies typically employ a spraying method to apply oil to the windings. Under external force, the oil gradually penetrates the windings, thereby carrying away heat. However, the oil distribution on the windings using these technologies is relatively uneven, resulting in low heat dissipation efficiency.

[0062] In view of this, the embodiments of this application aim to provide a motor stator cooling assembly, a motor and a vehicle, wherein a heat dissipation oil cavity is formed by the housing, the stator core, the first oil storage ring and the second oil storage ring, and the winding is located in the heat dissipation oil cavity. Oil can be injected into the heat dissipation oil cavity through the oil inlet on the housing. The oil filling the heat dissipation oil cavity can ensure uniform contact between the oil and the winding, thereby improving the heat dissipation uniformity of the winding, improving the heat dissipation efficiency of the winding, reducing the temperature of the winding, and ensuring the stability of motor operation.

[0063] The embodiments of this application are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of the embodiments of this application, the first direction X and the second direction Y are two mutually perpendicular directions. The first direction X may be, for example, the axial direction of the motor, and the second direction Y may be, for example, the radial direction of the motor.

[0064] This application provides a motor stator cooling assembly, a motor, and a vehicle for cooling the windings on the motor stator core. It should be noted that the vehicle in this application can refer to large vehicles, small vehicles, special-purpose vehicles, etc. For example, according to vehicle type, the vehicle in this application can be a sedan, an off-road vehicle, a multi-purpose vehicle (MPV), or other types of vehicles. For new energy vehicles, an electric drive system is generally provided. The electric drive system includes core components such as a motor, electronic control unit, and reducer. Among these, the motor, as the core power component, experiences severe heat generation in the stator core windings during operation. Overheating of the windings significantly affects the motor's efficiency, power output, and lifespan.

[0065] Please refer to Figures 1-8 This application provides a motor stator cooling assembly, including:

[0066] Housing 100. Exemplarily, housing 100 is generally cylindrical, and one side of housing 100 (right side of the figure) may be provided with an opening to allow parts to be placed inside housing 100.

[0067] The stator core 200 is located inside the housing 100. Exemplarily, the stator core 200 is also cylindrical and can be disposed close to the housing 100. The rotor (not shown) can be disposed radially inside the stator core 200.

[0068] Winding 300 is wound around stator core 200. For example, as shown... Figure 1 , Figure 3 and Figure 8 As shown, the winding 300 can be inserted into the stator core 200, and both ends of the winding 200 can be exposed on both sides of the stator core 200 along the first direction X. At least one side of the winding 300 can also be provided with a lead wire 310 for connection with external parts.

[0069] The first oil storage ring 400 is located at the first end of the stator core 200 along the first direction X, and the first oil storage ring 400 abuts against the housing 100 and the side of the stator core 200 away from the housing 100.

[0070] The second oil storage ring 500 is located at the second end of the stator core 200 along the first direction X, and the second oil storage ring 500 abuts against the housing 100 and the side of the stator core 200 away from the housing 100.

[0071] It is understood that the housing 100, stator core 200, first oil storage ring 400, and second oil storage ring 500 together form a heat dissipation oil cavity 600, and the winding 300 is located inside the heat dissipation oil cavity 600. The housing 100 is provided with an oil inlet 601 communicating with the heat dissipation oil cavity 600, and the first oil storage ring 400 and / or the second oil storage ring 500 are provided with an oil outlet 602 communicating with the heat dissipation oil cavity 600. The oil enters the heat dissipation oil cavity 600 from the oil inlet 601 to fully contact the winding 300 inside the heat dissipation oil cavity 600, and finally flows out from the oil outlet 602.

[0072] In this embodiment, the housing 100, stator core 200, first oil storage ring 400, and second oil storage ring 500 together form a heat dissipation oil cavity 600, and the winding 300 is located inside the heat dissipation oil cavity 600. Oil can be injected into the heat dissipation oil cavity 600 through the oil inlet 601 on the housing 100. The oil filling the heat dissipation oil cavity 600 can ensure uniform contact between the oil and the winding 300, thereby improving the heat dissipation uniformity of the winding 300, improving the heat dissipation efficiency of the winding 300, reducing the temperature of the winding 300, and ensuring the stability of motor operation.

[0073] Please continue to refer to Figure 1 and Figure 3 In this embodiment, the first oil storage ring 400 includes a first body 410 and a first flange 420. The first body 410 is generally cylindrical, and the first flange 420 is disposed at one end of the first body 410. Along the first direction X, the first body 410 abuts against the first end of the stator core 200, and the first flange 420 is located at the end of the first body 410 away from the stator core 200. Along the second direction Y, the first body 410 is located on the side of the stator core 200 away from the housing 100, and the first flange 420 abuts against the housing 100. To ensure sealing, sealing rings can be provided between the first body 410 and the stator core 200, and between the first flange 420 and the housing 100.

[0074] The second oil storage ring 500 includes a second body 510 and a second flange 520; wherein the second body 510 is generally cylindrical, and the second flange 520 is disposed at one end of the second body 510. Along the first direction X, the second body 510 abuts against the second end of the stator core 200, and the second flange 520 is located at the end of the second body 510 away from the stator core 200. Along the second direction Y, the second body 510 is located on the side of the stator core 200 away from the housing 100, and the second flange 520 abuts against the housing 100. To ensure sealing, sealing rings can be provided between the second body 510 and the stator core 200, and between the second flange 520 and the housing 100.

[0075] In this embodiment, the cooling oil chamber 600 includes a first cooling oil chamber 610 and a second cooling oil chamber 620. The housing 100, stator core 200, and first oil storage ring 400 together form the first cooling oil chamber 610; the housing 100, stator core 200, and second oil storage ring 500 together form the second cooling oil chamber 620. The cooling oil chamber 600 also has an oil passage connecting the first cooling oil chamber 610 and the second cooling oil chamber 620, allowing oil to flow between them.

[0076] In this embodiment, a first cooling oil cavity 610 is formed by the housing 100, the stator core 200, and the first oil storage ring 400, thereby cooling the winding 300 at the first end of the stator core 200. A second cooling oil cavity 620 is formed by the housing 100, the stator core 200, and the second oil storage ring 500, thereby cooling the winding 300 at the second end of the stator core 200. An oil passage connects the first cooling oil cavity 610 and the second cooling oil cavity 620, ensuring that oil can fill both cavities, thereby improving the heat dissipation efficiency of the winding 300 and reducing its temperature.

[0077] Furthermore, the oil passages in this embodiment include a plurality of first axial oil passages 630 and circumferential oil passages 640. The circumferential oil passages 640 are disposed on the inner surface of the housing 100, and are arranged circumferentially around the inner surface of the housing 100. The first axial oil passages 630 are disposed on the outer surface of the stator core 200, and the plurality of first axial oil passages 630 are spaced apart circumferentially around the stator core 200; for example, the plurality of first axial oil passages 630 can be equally spaced along the circumferential direction of the stator core 200. All the plurality of first axial oil passages 630 are connected to the circumferential oil passages 640. The first axial oil passages 630 connect to the first cooling oil cavity 610 and / or the second cooling oil cavity 620. The oil inlet 601 connects to the circumferential oil passages 640, and the oil outlet 602 is disposed away from the oil inlet 601.

[0078] With the above structure, the oil injected from the oil inlet 601 in this embodiment can flow into the circumferential oil passage 640 and flow along the circumferential flow passage 640. During the flow, the oil in the circumferential oil passage 640 gradually enters the corresponding first axial oil passage 630 and enters the first heat dissipation oil chamber 610 and / or the second heat dissipation oil chamber 620, thereby fully contacting the winding 300. The cooled oil finally flows out from the oil outlet 602.

[0079] The oil passages in this embodiment include a circumferential oil passage 640 and a plurality of first axial oil passages 630. Oil entering from the oil inlet 601 can flow evenly along the circumferential oil passage 640 to the plurality of first axial oil passages 630, and then flow into the first cooling oil chamber 610 and / or the second cooling oil chamber 620 through the first axial oil passages 630. This gradually fills the first cooling oil chamber 610 and the second cooling oil chamber 620, ensuring uniform contact between the oil and the winding 300. This improves the uniformity of heat dissipation of the winding 300, increases its heat dissipation efficiency, reduces its temperature, and ensures stable motor operation. By positioning the oil outlet 602 away from the oil inlet 601, the flow path and residence time of the oil within the cooling oil chamber 600 are increased, allowing the oil to fully contact the winding 300, further improving its heat dissipation efficiency.

[0080] Please continue to refer to Figure 1 and Figure 2 In one possible implementation, the first axial oil passage 630 includes a first sub-oil passage 631 and a second sub-oil passage 632. The first sub-oil passage 631 connects to the first cooling oil chamber 610, and the second sub-oil passage 632 connects to the second cooling oil chamber 620. The oil outlet 602 includes a first oil outlet 6021 and a second oil outlet 6022. The first oil outlet 6021 is connected to the first cooling oil chamber 610, and the second oil outlet 6022 is connected to the second cooling oil chamber 620.

[0081] With the above structure, in this embodiment, the oil injected from the oil inlet 601 can flow into the circumferential oil channel 640 and flow along the circumferential flow channel 640. During the flow, the oil in the circumferential oil channel 640 gradually enters the corresponding first sub-oil channel 631 and second sub-oil channel 632, and then enters the first heat dissipation oil cavity 610 and the second heat dissipation oil cavity 620, thereby fully contacting the winding 300. After heat dissipation, the oil in the first heat dissipation oil cavity 610 finally flows out from the first oil outlet 6021, and the oil in the second heat dissipation oil cavity 620 finally flows out from the second oil outlet 6022. Furthermore, the first oil storage ring 400 is also provided with a first oil guide rib 430 near the first oil outlet 6021. The first oil guide rib 430 can introduce oil into bearings and other parts to lubricate the bearings. Similarly, the second oil storage ring 500 is also provided with a second oil guide rib 530 near the second oil outlet 6022. The second oil guide rib 530 can introduce oil into bearings and other parts to lubricate the bearings.

[0082] In this embodiment, the first sub-oil channel 631 connects to the first cooling oil chamber 610, and the second sub-oil channel 632 connects to the second cooling oil chamber 620. The oil entering from the oil inlet 601 can flow evenly along the circumferential oil channel 640 to multiple first axial oil channels 630, and then flow into the first cooling oil chamber 610 through the first sub-oil channel 631 and into the second cooling oil chamber 620 through the second sub-oil channel 632. This gradually fills the first cooling oil chamber 610 and the second cooling oil chamber 620 with oil. After heat dissipation, the oil flows out of the first cooling oil chamber 610 through the first oil outlet 6021 and out of the second cooling oil chamber 620 through the second oil outlet 6022. This ensures that the oil is in uniform contact with the winding 300, which helps to improve the heat dissipation uniformity of the winding 300, improve the heat dissipation efficiency of the winding 300, reduce the temperature of the winding 300, and ensure the stability of motor operation.

[0083] Please continue to refer to Figure 3 , Figure 4 , Figure 5 and Figure 8 In another possible embodiment, the oil passage further includes a plurality of second axial oil passages 650. The second axial oil passages 650 are disposed on the inner surface of the stator core 200 and penetrate the stator core 200 along the first direction X. The second axial oil passages 650 may be grooves disposed on the inner surface of the stator core 200. The plurality of second axial oil passages 650 are spaced apart circumferentially along the stator core 200; for example, the plurality of second axial oil passages 650 may be equally spaced circumferentially along the stator core 200.

[0084] The first axial oil passage 630 is connected to one of the first cooling oil chamber 610 and the second cooling oil chamber 620, the second axial oil passage 650 is connected to the first cooling oil chamber 610 and the second cooling oil chamber 620, and the oil outlet 602 is connected to the other of the first cooling oil chamber 610 and the second cooling oil chamber 620.

[0085] In this embodiment, the first axial oil passage 630 may be connected to the second cooling oil chamber 620, and the oil outlet 602 may be connected to the first cooling oil chamber 610. Oil injected from the oil inlet 601 can flow into the circumferential oil passage 640 and flow along the circumferential flow channel 640. During the flow, the oil in the circumferential oil passage 640 gradually enters the corresponding first axial oil passage 630 and then enters the second cooling oil chamber 620. The oil in the second cooling oil chamber 620 then enters the first cooling oil chamber 610 through the second axial oil passage 650, thereby fully contacting the winding 300. The cooled oil finally flows out from the oil outlet 602.

[0086] In this embodiment, the oil entering through the oil inlet 601 can flow evenly along the circumferential oil passage 640 to multiple first axial oil passages 630, and then flow through the first axial oil passages 630 into one of the first cooling oil chambers 610 and the second cooling oil chamber 620. Subsequently, it enters the other of the first cooling oil chambers 610 and 620 through the second axial oil passage 650, thereby gradually filling the first and second cooling oil chambers 610 and 620 with oil. This ensures uniform contact between the oil and the winding 300, which helps improve the uniformity of heat dissipation of the winding 300, increases its heat dissipation efficiency, reduces its temperature, and ensures stable motor operation. By placing the oil outlet 602 on the other of the first and second cooling oil chambers 610 and 620, the flow path and residence time of the oil within the cooling oil chamber 600 can be increased, allowing the oil to fully contact the winding 300, further improving the heat dissipation efficiency of the winding 300.

[0087] Please continue to refer to Figure 6 and Figure 7 This application embodiment also includes a sealing bushing 700, which includes a bushing body 710, a first folded edge 720, and a second folded edge 730. The bushing body 710 is generally cylindrical, and the first folded edge 720 and the second folded edge 730 are located at opposite ends of the bushing body 710 along a first direction X. The cross-section of the bushing body 710, the first folded edge 720, and the second folded edge 730 is generally U-shaped. The bushing body 710 is located inside the stator core 200, the first folded edge 720 abuts against the first end of the stator core 200, and the second folded edge 730 abuts against the second end of the stator core 200. The bushing body 710, the first folded edge 720, and the second folded edge 730 together cover the second axial oil passage 650 to achieve a seal on the second axial oil passage 650.

[0088] In this embodiment, the second axial oil passage 650, located on the inner surface of the stator core 200, is sealed by a sealing bushing 700. This ensures that the oil in the cooling oil chamber 600 will not leak, thus guaranteeing the heat dissipation efficiency of the winding 300. Simultaneously, the sealing bushing 700 also ensures a sufficient air gap between the stator core 200 and the internal rotor, guaranteeing that the electromagnetic performance of the motor is not affected.

[0089] Please continue to refer to Figure 8 In another possible implementation, a sealant layer is provided within the second axial oil passage 650 of this embodiment. The sealant layer is positioned near the opening of the second axial oil passage 650 and is used to seal the second axial oil passage 650. In other words, this embodiment can achieve sealing by applying sealant to the groove of the second axial oil passage 650.

[0090] In this embodiment, a sealant layer is filled into the second axial oil passage 650 to seal the second axial oil passage 650, ensuring that the oil in the heat dissipation oil chamber 600 will not leak, thereby ensuring the heat dissipation efficiency of the winding 300.

[0091] In this embodiment, the amount of oil entering the first cooling oil chamber 610 and the second cooling oil chamber 620 can be controlled by adjusting the cross-sectional area ratio of the first sub-oil passage 631 and the second sub-oil passage 632, according to the specific heat generation of the motor. The distribution of oil in the circumferential direction of the motor can be controlled by adjusting the cross-sectional area ratio of the first axial oil passage 630, the circumferential oil passage 640, and the second axial oil passage 650. Through this method, the amount of oil entering areas with high heat generation can be increased, thereby improving the heat dissipation efficiency of those areas.

[0092] Please continue to refer to Figure 1 and Figure 3 In this embodiment, the housing 100 is further provided with a cable outlet 110 communicating with the cooling oil chamber 600. A cable outlet seal 800 is provided at the cable outlet 110. The winding 300 also includes multiple lead wires 310, which pass through the cable outlet seal 800, and at least some of the lead wires 310 are located within the cooling oil chamber 600. For example, the winding 300 in this embodiment may have three lead wires 310, and the corresponding cable outlet seal 800 has three through holes, through which the three lead wires 310 respectively pass. The cable outlet seal 800 can be fixedly connected to the cable outlet 110 by means of threaded connection or other methods. A sealing ring can also be provided between the cable outlet seal 800 and the cable outlet 110 to improve sealing performance. Figure 1 and Figure 3As can be seen, in this embodiment, only part of the lead wire 310 is located outside the heat dissipation oil cavity 600, while most of the rest is located inside the heat dissipation oil cavity 600, so that it can fully contact the oil in the heat dissipation oil cavity 600 for heat dissipation.

[0093] In this embodiment, a wire outlet seal 800 is provided at the wire outlet 110 to ensure the sealing of the heat dissipation oil cavity 600. By placing a portion of the lead wire 310 of the winding 300 inside the heat dissipation oil cavity 600, the oil can be used to fully contact the lead wire 310 to dissipate heat.

[0094] This application also provides an electric motor, including any of the above-mentioned motor stator cooling assemblies.

[0095] Because the motor in this embodiment of the application uses the above-mentioned electronic stator cooling assembly, the winding can be placed in the heat dissipation oil chamber, and the oil can be made to contact the winding evenly. This helps to improve the heat dissipation uniformity of the winding, improve the heat dissipation efficiency of the winding, reduce the temperature of the winding, and ensure the stability of motor operation.

[0096] This application also provides a vehicle including the motor described above.

[0097] Because the vehicle in this embodiment uses the aforementioned motor, the temperature of the motor windings can be reduced during operation, thus ensuring the stability of motor operation.

[0098] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A motor stator cooling assembly, characterized in that, include: Casing (100); Stator core (200), the stator core (200) is located inside the housing (100); Winding (300), the winding (300) is wound on the stator core (200); The first oil storage ring (400) is located at the first end of the stator core (200) along the first direction, and the first oil storage ring (400) abuts against the housing (100) and the side of the stator core (200) away from the housing (100). The second oil storage ring (500) is located at the second end of the stator core (200) along the first direction, and the second oil storage ring (500) abuts against the housing (100) and the side of the stator core (200) away from the housing (100). The housing (100), stator core (200), first oil storage ring (400) and second oil storage ring (500) together form a heat dissipation oil cavity (600). The winding (300) is located in the heat dissipation oil cavity (600). The housing (100) is provided with an oil inlet (601) communicating with the heat dissipation oil cavity (600). The first oil storage ring (400) and / or the second oil storage ring (500) are provided with an oil outlet (602) communicating with the heat dissipation oil cavity (600).

2. The motor stator cooling assembly according to claim 1, characterized in that, The first oil storage ring (400) includes a first body (410) and a first flange (420). Along the first direction, the first body (410) abuts against the first end of the stator core (200), and the first flange (420) is located at the end of the first body (410) away from the stator core (200). Along the second direction, the first body (410) is located on the side of the stator core (200) away from the housing (100), and the first flange (420) abuts against the housing (100). The second oil storage ring (500) includes a second body (510) and a second flange (520). Along the first direction, the second body (510) abuts against the second end of the stator core (200), and the second flange (520) is located at the end of the second body (510) away from the stator core (200). Along the second direction, the second body (510) is located on the side of the stator core (200) away from the housing (100), and the second flange (520) abuts against the housing (100). The heat dissipation oil chamber (600) includes a first heat dissipation oil chamber (610) and a second heat dissipation oil chamber (620). The housing (100), stator core (200) and first oil storage ring (400) together form the first heat dissipation oil chamber (610). The housing (100), stator core (200) and second oil storage ring (500) together form the second heat dissipation oil chamber (620). The heat dissipation oil chamber (600) is also provided with an oil passage connecting the first heat dissipation oil chamber (610) and the second heat dissipation oil chamber (620). Wherein, the first direction and the second direction are perpendicular to each other.

3. The motor stator cooling assembly according to claim 2, characterized in that, The oil passage includes a plurality of first axial oil passages (630) and circumferential oil passages (640); the circumferential oil passages (640) are disposed on the inner surface of the housing (100) and are arranged along the circumference of the housing (100); the first axial oil passages (630) are disposed on the outer surface of the stator core (200) and the plurality of first axial oil passages (630) are spaced apart along the circumference of the stator core (200); the plurality of first axial oil passages (630) are all connected to the circumferential oil passages (640), the first axial oil passages (630) are connected to the first heat dissipation oil cavity (610) and / or the second heat dissipation oil cavity (620), the oil inlet (601) is connected to the circumferential oil passages (640), and the oil outlet (602) is disposed away from the oil inlet (601).

4. The motor stator cooling assembly according to claim 3, characterized in that, The first axial oil passage (630) includes a first sub-oil passage (631) and a second sub-oil passage (632). The first sub-oil passage (631) is connected to the first heat dissipation oil chamber (610), and the second sub-oil passage (632) is connected to the second heat dissipation oil chamber (620). The oil outlet (602) includes a first oil outlet (6021) and a second oil outlet (6022). The first oil outlet (6021) is connected to the first heat dissipation oil chamber (610), and the second oil outlet (6022) is connected to the second heat dissipation oil chamber (620).

5. The motor stator cooling assembly according to claim 3, characterized in that, The oil passage further includes a plurality of second axial oil passages (650), which are disposed on the inner surface of the stator core (200) and penetrate the stator core (200) along the first direction. The plurality of second axial oil passages (650) are arranged at intervals along the circumference of the stator core (200). The first axial oil passage (630) is connected to one of the first cooling oil chamber (610) and the second cooling oil chamber (620), and the second axial oil passage (650) is connected to the first cooling oil chamber (610) and the second cooling oil chamber (620); the oil outlet (602) is connected to the other of the first cooling oil chamber (610) and the second cooling oil chamber (620).

6. The motor stator cooling assembly according to claim 5, characterized in that, It also includes a sealing bushing (700), which includes a bushing body (710), a first folded edge (720), and a second folded edge (730). The first folded edge (720) and the second folded edge (730) are respectively located at both ends of the bushing body (710) along the first direction. The bushing body (710) is located inside the stator core (200). The first folded edge (720) abuts against the first end of the stator core (200), and the second folded edge (730) abuts against the second end of the stator core (200). The bushing body (710), the first folded edge (720), and the second folded edge (730) together cover the second axial oil passage (650).

7. The motor stator cooling assembly according to claim 5, characterized in that, The second axial oil passage (650) is provided with a sealant layer, which is used to seal the second axial oil passage (650).

8. The motor stator cooling assembly according to any one of claims 1-7, characterized in that, The housing (100) is also provided with a wire outlet (110) that communicates with the heat dissipation oil cavity (600). A wire outlet seal (800) is provided at the wire outlet (110). The winding (300) also includes multiple lead wires (310). The lead wires (310) pass through the wire outlet seal (800), and at least a portion of the lead wires (310) are located inside the heat dissipation oil cavity (600).

9. An electric motor, characterized in that, Includes the motor stator cooling assembly as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes the motor as described in claim 9.

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