Motor, motor cooling system and vehicle

Abstract

The invention provides a motor, a motor cooling system and a vehicle, and relates to the technical field of motors. The motor comprises a shell, a stator and a rotor, the stator comprises a stator iron core and a stator winding, the stator iron core is arranged in an inner cavity of the shell, a rotating space is defined by the radial inner side of the stator iron core, a shaft hole which is opposite to and communicated with the rotating space in the axial direction is formed in the shell, and a plurality of wire slots are further formed in the stator iron core; the stator winding comprises a plurality of wires which are connected with one another, a plurality of wires are arranged in each wire slot, a hollow cooling flow channel is arranged in each wire, and the cooling flow channels are used for circulating a first cooling medium; the rotor is rotatably arranged in the rotating space and penetrates through the shaft hole. According to the motor, the hollow cooling flow channel is arranged in the wire, so that the first cooling medium can be in full contact with the stator winding, and the uniformity of heat dissipation in the motor can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a motor, a motor cooling system and a vehicle. Background Art

[0002] Motors play a vital role in the vehicle's power system, energy management, auxiliary functions, and other aspects. Motors generate a large amount of heat during operation, so a motor cooling system is required to dissipate heat from the motor and ensure that the motor operates within the appropriate temperature range.

[0003] In the prior art, heat is dissipated by oil spray cooling, wherein the stator of the motor includes a stator core and a stator winding, and the stator winding includes multiple turns of wire. Cooling oil is directly sprayed onto the end of the stator winding by setting an oil spray ring or an oil spray hole to achieve heat dissipation.

[0004] However, in the above heat dissipation method, the spraying position of the cooling oil is difficult to control accurately, resulting in a limited area covered by the cooling oil. Some windings cannot fully contact the cooling oil, resulting in uneven heat dissipation. Summary of the Invention

[0005] One of the purposes of the present invention is to provide a motor to solve the problem in the prior art that the cooling oil spray position is difficult to control when the motor dissipates heat, resulting in uneven heat dissipation; the second purpose is to provide a motor cooling system; and the third purpose is to provide a vehicle.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A motor comprises: a housing; a stator, the stator comprising: a stator core disposed in an inner cavity of the housing, the radial inner side of the stator core defining a rotation space, the housing being provided with an axial hole axially opposite to and connected to the rotation space, the stator core also being provided with a plurality of wire slots; a stator winding comprising a plurality of interconnected wires, each of the wire slots being provided with a plurality of the wires, the wires being provided with hollow cooling channels therein, the cooling channels being used to circulate a first cooling medium; and a rotor rotatably disposed in the rotation space and extending through the axial hole.

[0008] According to the above technical means, the wires in the stator windings not only undertake the important task of current transmission, but also realize the integration of cooling functions through the hollow cooling channels inside them. The first cooling medium can circulate in the cooling channels, thereby effectively reducing the temperature of the wires during operation and improving the operating efficiency and stability of the motor. This cooling method not only saves space, but also improves the cooling efficiency, allowing the motor to maintain good performance during high-load operation. At the same time, the first cooling medium is in full contact with the wires in the process of flowing from one end to the other end of the cooling channel, thereby ensuring that the wires in each part of the stator winding are in heat exchange contact with the first cooling medium, which is conducive to improving the uniformity of heat dissipation and thus ensuring the working performance of the motor.

[0009] Furthermore, the wire slots penetrate both ends of the stator core along the axial direction of the stator core, and the conducting wires are passed through the wire slots along the axial direction of the stator core.

[0010] According to the above technical means, the wire is passed through the stator core axially, and the rotating space also passes through the stator core axially. In this way, the wire is distributed on the outer peripheral side of the rotating space, which is conducive to ensuring that the direction of the current pair in the wire is coordinated with the direction of the magnetic field of the stator core, thereby more effectively generating the electromagnetic effect, improving the electromagnetic conversion efficiency of the motor, and helping to improve the overall reliability and stability of the motor.

[0011] Furthermore, a liquid separation chamber and a liquid collection chamber are provided in the shell; the inlet of the cooling channel of each wire is connected to the liquid separation chamber, and the outlet of the cooling channel of each wire is connected to the liquid collection chamber. A first communicating hole connected to the liquid separation chamber and a second communicating hole connected to the liquid collection chamber are provided on the shell, and the first communicating hole and the second communicating hole are both used to communicate with external pipelines.

[0012] According to the above technical means, the low-temperature first cooling medium enters the liquid separation chamber through the first connecting hole, and the first cooling medium in the liquid separation chamber enters the cooling channel in each wire under the action of the pressure of the first driving member in the external pipeline. After the first cooling medium flows in the cooling channel and fully exchanges heat with the wire, it flows out through the outlet of the cooling channel into the liquid collecting chamber. The first cooling medium with increased temperature enters the external pipeline through the second connecting hole for cooling, thereby completing a heat dissipation cycle of the first cooling medium.

[0013] Furthermore, it also includes: a liquid separation component, which is arranged on the first side of the stator core along the axial direction, and the liquid separation component defines the liquid separation cavity.

[0014] According to the above technical means, the shape of the liquid separation member matches the shape of the stator core, and together with the stator core, defines an annular liquid separation cavity to ensure that the inlets of all wires are connected to the liquid separation cavity.

[0015] Furthermore, it also includes: an oil baffle plate, which is arranged on the second side of the stator core along the axial direction, and the oil baffle plate, the stator core and the rotor jointly define the liquid collecting cavity.

[0016] According to the above technical means, the oil baffle can prevent the first cooling medium from being sprayed too far. The oil baffle, the rotor, and the stator core together form an annular liquid collecting chamber with the rotor as the central axis, thereby collecting the heated first cooling medium and outputting it from the motor through the second connecting hole.

[0017] A motor cooling system comprises: a heat exchange member, a first drive member, a second drive member and a cooling assembly, and a motor as described above, wherein the heat exchange member is provided with a first heat exchange channel and a second heat exchange channel, wherein the first drive member, the cooling channel in the wire of the motor and the first heat exchange channel are connected through a first pipeline to form a first circulation loop; the second drive member, the cooling assembly and the second heat exchange channel are connected through a second pipeline to form a second circulation loop; the first circulation loop is suitable for circulating a first cooling medium, and the second circulation loop is suitable for circulating a second cooling medium.

[0018] According to the above technical means, the first cooling medium brings the heat inside the motor out to the heat exchange element through the first circulation loop, and the second cooling medium brings the heat of the first cooling medium in the heat exchange element out to the cooling component through the second circulation loop. The cooling component is connected to the outside world, thereby bringing the heat out of the motor cooling system, thereby completing the complete heat dissipation process.

[0019] Furthermore, the heat exchange element includes: a heat exchange shell, the heat exchange shell is provided with a second heat exchange cavity and a second liquid inlet and a second liquid outlet connected to the second heat exchange cavity, the second liquid inlet and the second liquid outlet are both connected to the second pipeline; a heat exchange core is arranged in the second heat exchange cavity, the heat exchange core is provided with a first heat exchange cavity and a first liquid inlet and a first liquid outlet connected to the first heat exchange cavity, the first liquid inlet and the first liquid outlet are both connected to the first pipeline.

[0020] According to the above technical means, the first heat exchange channel is formed into a first heat exchange cavity, and the second heat exchange channel is formed into a second heat exchange cavity. The high-temperature first cooling medium enters the first heat exchange cavity through the first liquid inlet, and the low-temperature second cooling medium enters the second heat exchange cavity through the second liquid inlet. The first cooling medium and the second cooling medium exchange heat, the temperature of the first cooling medium decreases, and the temperature of the second cooling medium increases. The high-temperature second cooling medium flows out through the second liquid outlet and then into the second pipeline. The low-temperature first cooling medium flows out through the first liquid outlet and then into the first pipeline to dissipate heat from the motor.

[0021] Furthermore, the second heat exchange cavity surrounds the heat exchange core, and the first liquid inlet and the first liquid outlet respectively penetrate the heat exchange shell to communicate with the first pipeline.

[0022] According to the above technical means, the second heat exchange cavity is arranged around the heat exchange core, which is beneficial to increasing the heat exchange contact area between the second cooling medium and the heat exchange core, thereby improving the heat exchange efficiency between the second cooling medium and the first cooling medium, and is beneficial to ensuring that the first cooling medium is quickly cooled in the heat exchange element, thereby improving the heat dissipation performance of the motor cooling system.

[0023] Furthermore, the heat exchange core is provided with a plurality of heat exchange fins, and the plurality of heat exchange fins are distributed at intervals along the axial direction of the heat exchange core.

[0024] The above-mentioned technical approach increases the contact area between the heat exchange core and the fluid by spacing the fins, allowing heat to be transferred more quickly between the secondary coolant and the heat exchange core. This not only optimizes the heat transfer path but also, through the guidance of the fins, improves the flow characteristics of the fluid, reduces flow resistance, and thus enhances the overall efficiency of the heat exchange process.

[0025] Furthermore, it also includes: a fine filter, which is arranged in the first circulation loop.

[0026] According to the above technical means, impurities and harmful substances in the first cooling medium are filtered through a fine filter. On the one hand, the obstruction of the impurities to the flow of the first cooling medium can be reduced, ensuring that the first cooling medium can quickly and evenly remove heat from the motor. On the other hand, the aging rate of the first cooling medium can be slowed down, so that it maintains good physical and chemical properties, which is conducive to reducing the replacement frequency of the first cooling medium and saving the maintenance cost of the motor cooling system.

[0027] Furthermore, the first cooling medium includes cooling oil; and / or the second cooling medium includes cooling water.

[0028] According to the above technical means, the cooling oil has high thermal stability and strong insulation. While dissipating heat to the stator winding, it can also contact with the rotor to play a certain lubricating and protective role. The cooling water has a higher thermal conductivity and can quickly remove the heat of the cooling oil, thereby improving the heat dissipation efficiency of the motor cooling system and ensuring that the motor can still maintain good performance under high load or high temperature environment.

[0029] A vehicle comprises: the motor described in any one of the above items; or the motor cooling system described in any one of the above items.

[0030] According to the above technical means, by applying the above motor or motor cooling system, it is beneficial to ensure that the motor in the vehicle always operates within a suitable temperature range, which is beneficial to improving the reliability of the vehicle.

[0031] Beneficial effects of the present invention:

[0032] (1) The present invention provides a hollow cooling channel inside the conductor. The first cooling medium flows in the cooling channel and is in full contact with the conductor, which is beneficial to improving the uniformity of heat dissipation of the stator winding inside the motor.

[0033] (2) The cooling channel of the present invention is arranged inside the conductor, which has a compact structure and is conducive to optimizing the space utilization inside the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the internal structure of the motor of the present invention;

[0035] Figure 2 Schematic diagram of the structure of the conductor of the motor of the present invention when the skin effect occurs;

[0036] Figure 3 for Figure 1 A partial enlarged view of point A in the middle;

[0037] Figure 4 It is a structural schematic diagram of the motor cooling system of the present invention;

[0038] Figure 5 for Figure 4 BB cross-sectional view of the heat exchange component.

[0039] Description of reference numerals:

[0040] 100-motor;

[0041] 110-housing; 111-shaft hole;

[0042] 120 - stator; 121 - stator core; 1211 - rotating space; 122 - stator winding; 1221 - wire; 1221a - cooling channel;

[0043] 130-rotor;

[0044] 140 - liquid separation member; 141 - liquid separation chamber; 1411 - first communication hole; 142 - sealing member;

[0045] 150 - oil baffle; 151 - liquid collecting chamber; 1511 - second communication hole;

[0046] 200-heat exchange components;

[0047] 210 - heat exchange shell; 211 - second heat exchange chamber; 2111 - second liquid inlet; 2112 - second liquid outlet;

[0048] 220 - heat exchange core; 221 - first heat exchange cavity; 2211 - first liquid inlet; 2212 - first liquid outlet; 222 - heat exchange fins;

[0049] 300-first driving member;

[0050] 400 - second driving member;

[0051] 500-cooling assembly;

[0052] 600-first pipeline;

[0053] 700-second pipeline;

[0054] 800-fine filter. DETAILED DESCRIPTION

[0055] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0056] In the prior art, heat dissipation is achieved through oil spray cooling. The motor's stator consists of a stator core and stator windings, each of which comprises multiple turns of wire. Cooling oil is sprayed directly onto the ends of the stator windings using oil spray rings or holes. However, the precise control of the spray position of the cooling oil is difficult, resulting in a limited area covered by the cooling oil. Some windings are unable to fully reach the cooling oil, leading to uneven heat dissipation.

[0057] In response to the above technical problems, an embodiment of the present application provides a motor, comprising a housing, a stator and a rotor, wherein the stator comprises a stator core and a stator winding, wherein the stator winding comprises a plurality of conductors, the conductors being arranged in the wire slots of the stator core, and a hollow cooling channel being provided inside the conductors, the cooling channel being used to circulate a first cooling medium. The conductors not only undertake the important task of current transmission, but also realize the integration of cooling functions through the hollow cooling channel inside them. The first cooling medium can circulate in the cooling channel, thereby effectively reducing the temperature of the conductors during operation and improving the operating efficiency and stability of the motor. This cooling method not only saves space but also improves cooling efficiency, enabling the motor to maintain good performance during high-load operation. At the same time, the first cooling medium fully contacts the conductors during the process of flowing from one end of the cooling channel to the other end, thereby ensuring that the conductors of each part of the stator winding are in heat exchange contact with the first cooling medium, which is conducive to improving the uniformity of heat dissipation and thus ensuring the operating performance of the motor.

[0058] The following specific embodiments are used to describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following embodiments of the present application are described in conjunction with the accompanying drawings:

[0059] It should be noted that the motor provided in the embodiments of the present application can be applied to various motor cooling systems or vehicles.

[0060] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides a motor 100, including a housing 110, a stator 120 and a rotor 130, wherein the stator 120 includes a stator core 121 and a stator winding 122, the stator core 121 is arranged in the inner cavity of the housing 110, and the radial inner side of the stator core 121 defines a rotation space 1211, and the housing 110 is provided with an axial hole 111 axially opposite to and connected to the rotation space 1211, and the stator core 121 is also provided with a plurality of wire slots (not shown in the figure); the stator winding 122 includes a plurality of interconnected wires 1221, each wire slot is provided with a plurality of wires 1221, and a hollow cooling channel 1221a is provided inside the wire 1221, and the cooling channel 1221a is used to circulate a first cooling medium; the rotor 130 is rotatably arranged in the rotation space 1211 and penetrates the axial hole 111.

[0061] In the embodiment of the present application, the housing 110 serves as the basic structure of the motor 100, providing stable support and protection for the entire device. The stator 120 is one of the core components of the motor 100. Its stator core 121 is installed in the inner cavity of the housing 110. Through the radial inner structure, a rotation space 1211 is formed, which provides the necessary spatial environment for the rotation of the rotor 130. At the same time, the axial hole 111 on the housing 110 is axially opposite and connected to the rotation space 1211, ensuring that the rotor 130 can be smoothly inserted therein to realize its rotatable function. The multiple slots on the stator core 121 are the key support structure of the stator winding 122.

[0062] Furthermore, the stator winding 122 includes a plurality of conductors 1221, with a plurality of conductors 1221 being arranged in each wire slot, and a hollow cooling channel 1221a being provided inside the conductors 1221, the cooling channel 1221a being used to circulate a first cooling medium. The conductors 1221 not only undertake the important task of transmitting current, but also achieve the integration of cooling functions through the hollow cooling channel 1221a inside them. The first cooling medium can circulate in the cooling channel 1221a, thereby effectively reducing the temperature of the conductors 1221 during operation and improving the operating efficiency and stability of the motor 100. This cooling method not only saves space but also improves cooling efficiency, enabling the motor 100 to maintain good performance during high-load operation. At the same time, the first cooling medium fully contacts the conductors 1221 during the process of flowing from one end of the cooling channel 1221a to the other end, thereby ensuring that the conductors 1221 in each part of the stator winding 122 are in heat exchange contact with the first cooling medium, which is conducive to improving the uniformity of heat dissipation and thus ensuring the operating performance of the motor 100.

[0063] It should be noted that when the motor 100 is running, when the alternating current passes through the wire 1221, the wire 1221 will produce a skin effect, that is, the current inside the wire 1221 tends to concentrate on the surface of the wire 1221, such as Figure 2 As shown, the current actually passing through the middle portion of wire 1221 is relatively small. In the embodiment of the present application, configuring wire 1221 as a hollow structure does not significantly affect the electrical conductivity of wire 1221 itself, thereby improving heat dissipation uniformity while ensuring electrical conductivity. Furthermore, the cross-section of wire 1221 can be configured into various shapes, such as circular or square, depending on the needs of motor 100. This embodiment of the present application does not impose any restrictions on this, as long as a hollow cooling channel 1221a is provided in the middle portion of wire 1221.

[0064] Furthermore, the rotor 130, another core component of the motor 100, is rotatably disposed within a rotational space 1211 defined by the stator core 121 and extends through the axial hole 111 of the housing 110. This ensures a precise fit between the rotor 130 and the stator 120 and also ensures the free rotation of the rotor 130. When the motor 100 is running, the rotor 130 rotates under the influence of the magnetic field generated by the stator 120, thereby converting mechanical energy into electrical energy.

[0065] Therefore, the motor 100 provided in the embodiment of the present application improves the heat dissipation efficiency of the motor 100 and ensures the uniformity of heat dissipation by setting a hollow cooling channel 1221a in the wire 1221, while being conducive to optimizing the space utilization inside the motor 100 and reducing the volume of the motor 100.

[0066] In some possible implementations, see Figure 1and Figure 2 As shown, the wire slots of the embodiment of the present application pass through both ends of the stator core 121 along the axial direction of the stator core 121, and the wires 1221 are arranged in the wire slots along the axial direction of the stator core 121. Figure 1 The X direction is the axial direction of the stator core 121 , and the Y direction is the radial direction of the stator core 121 .

[0067] It can be understood that the wire slots running through both ends of the stator core 121 provide a continuous and stable installation space for the wire 1221, which is conducive to ensuring the smoothness of the wire 1221 during the installation process and avoiding the twisting, deformation or even damage of the wire 1221 due to interruption or discontinuity of the wire slots.

[0068] In addition, the wire 1221 is arranged axially through the stator core 121, and the rotating space 1211 also axially penetrates the stator core 121. In this way, the wire 1221 is distributed on the outer peripheral side of the rotating space 121, which is conducive to ensuring that the direction of the current pair in the wire 1221 is coordinated with the magnetic field direction of the stator core 121, thereby more effectively generating electromagnetic effects, improving the electromagnetic conversion efficiency of the motor 100, and helping to improve the overall reliability and stability of the motor 100.

[0069] In some possible implementations, see Figures 1 to 4 As shown, a liquid separation chamber 141 and a liquid collection chamber 151 are provided in the shell 110 of the embodiment of the present application; the inlet of the cooling channel 1221a of each wire 1221 is connected to the liquid separation chamber 141, and the outlet of the cooling channel 1221a of each wire 1221 is connected to the liquid collection chamber 151, and a first connecting hole 1411 connected to the liquid separation chamber 141 and a second connecting hole 1511 connected to the liquid collection chamber 151 are provided on the shell 110, and the first connecting hole 1411 and the second connecting hole 1511 are both used to connect to external pipelines.

[0070] In some embodiments, a low-temperature first cooling medium enters the liquid separation chamber 141 through the first connecting hole 1411. The first cooling medium in the liquid separation chamber 141 enters the cooling channel 1221a in each wire 1221 under the pressure of the first driving member 300 in the external pipeline. After flowing in the cooling channel 1221a and fully exchanging heat with the wire 1221, the first cooling medium flows out through the outlet of the cooling channel 1221a and enters the liquid collecting chamber 151. The first cooling medium with a higher temperature enters the external pipeline through the second connecting hole 1511 for cooling, thereby completing a heat dissipation cycle of the first cooling medium. In this way, the cooling circulation of each wire 1221 can be guaranteed while the first cooling medium circulates, ensuring uniform heat dissipation. The inlet and outlet sides of each wire 1221 can also be converged in the liquid separation chamber 141 and the liquid collecting chamber 151, respectively, so as to be connected to the external pipeline outside the motor 100, which is conducive to ensuring the smooth circulation of the first cooling medium.

[0071] In some possible implementations, see Figures 1 to 3 As shown, the embodiment of the present application further includes: a liquid separation member 140 , which is disposed on a first side of the stator core 121 along the axial direction, and the liquid separation member 140 defines a liquid separation cavity 141 .

[0072] In a specific implementation, the shape of the liquid separator 140 matches the shape of the stator core 121, and together with the stator core 121, defines an annular liquid separator 141 to ensure that the entrances of all wires 1221 are connected to the liquid separator 141. A sealing member 142 can also be provided between the liquid separator 141 and the stator core 121 to ensure the sealing of the liquid separator 141 and prevent the first cooling medium from leaking out of the liquid separator 141 and affecting the operation of other components in the motor 100. The sealing member 142 can be a rubber member, a silicone member, etc., which is not limited in the embodiment of the present application.

[0073] In some possible implementations, see Figure 1 、 Figure 2 and Figure 4 As shown, the embodiment of the present application further includes: an oil baffle 150 , which is disposed on the second axial side of the stator core 121 . The oil baffle 150 , the stator core 121 and the rotor 130 together define a liquid collecting chamber 151 .

[0074] It is understood that in order to ensure that the first cooling medium maintains a certain flow rate within the cooling channel 1221a of the wire 1221, a first drive member 300 is required to be installed in the external pipeline. The first drive member 300 can be a drive pump, etc., to apply a certain pressure to the first cooling medium. Therefore, when the first cooling medium flows out of the outlet of the cooling channel 1221a, it still has a relatively high flow rate and is ejected from the outlet. Therefore, an oil baffle 150 is required to prevent the first cooling medium from being ejected too far. The oil baffle 150, the rotor 130, and the stator core 121 together enclose an annular liquid collection chamber 151 with the rotor 130 as the central axis, thereby collecting the heated first cooling medium and outputting it from the motor 100 through the second connecting hole 1511.

[0075] See also Figure 1 、 Figure 2 and Figure 4As shown, an embodiment of the present application also provides a motor cooling system, including: a heat exchange member 200, a first driving member 300, a second driving member 400 and a cooling assembly 500 and any of the above-mentioned motors 100, the heat exchange member 200 is provided with a first heat exchange channel and a second heat exchange channel, wherein the first driving member 300, the cooling channel 1221a in the wire 1221 of the motor 100 and the first heat exchange channel are connected through a first pipeline 600 to form a first circulation loop; the second driving member 400, the cooling assembly 500 and the second heat exchange channel are connected through a second pipeline 700 to form a second circulation loop; the first circulation loop is suitable for circulating a first cooling medium, and the second circulation loop is suitable for circulating a second cooling medium.

[0076] The specific structure and working principle of the motor 100 have been described in detail in the above embodiments and will not be repeated here.

[0077] In an embodiment of the present application, a low-temperature first cooling medium flows out from the first heat exchange channel of the heat exchange element 200, and under the drive of the first driving element 300, passes through the first pipeline 600 into the cooling channel 1221a in the wire 1221 of the motor 100 to exchange heat with the wire 1221. The first cooling medium with increased temperature circulates through the motor 100 and returns to the first heat exchange channel of the heat exchange element 200 through the first pipeline 600.

[0078] Heat exchange contact is formed between the first heat exchange channel and the second heat exchange channel. The low-temperature second cooling medium in the second heat exchange channel contacts the high-temperature first cooling medium in the first heat exchange channel, thereby reducing the temperature of the first cooling medium. The second cooling medium with an increased temperature after heat exchange flows to the cooling component 500 through the second pipeline 700 under the drive of the second driving member 400. After heat exchange and cooling in the cooling component 500, the second cooling medium returns to the second heat exchange channel through the second pipeline 700.

[0079] Thus, the first cooling medium brings the heat inside the motor 100 out to the heat exchange element 200 through the first circulation loop, and the second cooling medium brings the heat of the first cooling medium in the heat exchange element 200 out to the cooling component 500 through the second circulation loop. The cooling component 500 is connected to the outside world, thereby bringing the heat out of the motor cooling system, thereby completing the complete heat dissipation process.

[0080] Among them, the specific materials of the first cooling medium and the second cooling medium are not limited in the embodiments of the present application. In specific implementation, the first cooling medium can be selected as a cooling medium with good insulation to avoid short circuit inside the motor 100, and the second cooling medium can be selected as a cooling medium with higher thermal conductivity so that the second cooling medium can quickly absorb the heat of the first cooling medium in the heat exchanger 200. For example, the first cooling medium is cooling oil and the second cooling medium is cooling water. The cooling oil has high thermal stability and strong insulation. While dissipating heat to the stator winding 122, it can also contact with the rotor 130 to play a certain lubrication and protection role. The cooling water has a higher thermal conductivity and can quickly take out the heat of the cooling oil, thereby improving the heat dissipation efficiency of the motor cooling system and ensuring that the motor 100 can still maintain good performance under high load or high temperature environment.

[0081] The cooling assembly 500 may be an air cooling device, a heat pump system, or the like, and is not limited in this embodiment of the present application, as long as it can quickly remove the heat from the second cooling medium. The first driving member 300 and the second driving member 400 may be an oil pump and a water pump, respectively, and are not limited in this embodiment of the present application, as long as they can drive the first cooling medium and the second cooling medium to flow at a predetermined flow rate.

[0082] In addition, the motor cooling system provided in the embodiment of the present application can not only dissipate heat from the inside of the motor 100, but also heat the inside of the motor 100 through the motor cooling system when the motor 100 is in a low-temperature environment to ensure the working efficiency of the motor 100. At this time, it is only necessary to heat the second cooling medium at the cooling component 500, heat the first cooling medium in the heat exchange element 200 through the second cooling medium, and finally heat the motor 100 through the first cooling medium. Its working principle is the same as that of heat dissipation, and will not be repeated here.

[0083] In some possible implementations, see Figures 1 to 5 As shown, the heat exchange element 200 of the embodiment of the present application includes: a heat exchange shell 210 and a heat exchange core 220, the heat exchange shell 210 is provided with a second heat exchange cavity 211 and a second liquid inlet 2111 and a second liquid outlet 2112 connected to the second heat exchange cavity 211, the second liquid inlet 2111 and the second liquid outlet 2112 are both connected to the second pipeline 700; the heat exchange core 220 is arranged in the second heat exchange cavity 211, the heat exchange core 220 is provided with a first heat exchange cavity 221 and a first liquid inlet 2211 and a first liquid outlet 2212 connected to the first heat exchange cavity 221, the first liquid inlet 2211 and the first liquid outlet 2212 are both connected to the first pipeline 600.

[0084] In some embodiments, the first heat exchange channel is formed as a first heat exchange cavity 221, and the second heat exchange channel is formed as a second heat exchange cavity 211. The high-temperature first cooling medium enters the first heat exchange cavity 221 through the first liquid inlet 2211, and the low-temperature second cooling medium enters the second heat exchange cavity 211 through the second liquid inlet 2111. The first cooling medium and the second cooling medium exchange heat, the temperature of the first cooling medium decreases, and the temperature of the second cooling medium increases. The high-temperature second cooling medium flows out through the second liquid outlet 2112 and then flows into the second pipeline 700. The low-temperature first cooling medium flows out through the first liquid outlet 2212 and then flows into the first pipeline 600 to dissipate heat from the motor 100.

[0085] In some possible implementations, see Figures 1 to 5 As shown, the second heat exchange chamber 211 of the embodiment of the present application surrounds the heat exchange core 220 , and the first liquid inlet 2211 and the first liquid outlet 2212 respectively penetrate the heat exchange shell 210 to communicate with the first pipeline 600 .

[0086] In specific implementation, the second heat exchange cavity 211 is arranged around the heat exchange core 220, which is beneficial to increasing the heat exchange contact area between the second cooling medium and the heat exchange core 220, thereby improving the heat exchange efficiency between the second cooling medium and the first cooling medium, and is beneficial to ensuring that the first cooling medium is quickly cooled in the heat exchange element 200, thereby improving the heat dissipation performance of the motor cooling system.

[0087] In addition, the first liquid inlet 2211 and the first liquid outlet 2212 pass through the heat exchange shell 210, so that the second liquid inlet 2111, the second liquid outlet 2112, the first liquid inlet 2211 and the first liquid outlet 2212 are all located on the outer surface of the heat exchange shell 210, thereby facilitating the connection of the first pipeline 600 and the second pipeline 700 with the heat exchange element 200, which is beneficial to improving the assembly efficiency of the motor cooling system.

[0088] In some possible implementations, see Figure 4 and Figure 5 As shown, a plurality of heat exchange fins 222 are provided on the heat exchange core 220 of the embodiment of the present application, and the plurality of heat exchange fins 222 are distributed at intervals along the axial direction of the heat exchange core 220 .

[0089] In some embodiments, the heat exchange core 220 is provided with a plurality of axially spaced heat exchange fins 222, which improves heat exchange efficiency and performance. The spaced distribution of the heat exchange fins 222 increases the contact area between the heat exchange core 220 and the fluid, allowing heat to be transferred more quickly between the second cooling medium and the heat exchange core 220. This not only optimizes the heat conduction path but also, through the guiding effect of the fins, improves the flow characteristics of the fluid, reduces flow resistance, and thus improves the overall efficiency of the heat exchange process.

[0090] In some possible implementations, see Figure 1 、 Figure 2 and Figure 4 As shown, the embodiment of the present application further includes a fine filter 800, which is arranged in the first circulation loop.

[0091] In a specific implementation, the fine filter 800 is arranged between the first liquid outlet 2212 and the first connecting hole 1411. Since the first cooling medium is in direct contact with the stator core 121, the stator winding 122, the rotor 130 and other components in the motor 100, some impurities generated inside the motor 100 may be brought in during the circulation of the first cooling medium. These impurities may cause the cooling channel 1221a to be blocked, affecting the heat dissipation efficiency of the motor 100. At the same time, the first cooling medium may also produce some harmful substances due to its own oxidation and decomposition.

[0092] Therefore, it is necessary to set up a fine filter 800 to filter impurities and harmful substances in the first cooling medium. On the one hand, it can reduce the obstruction of impurities to the flow of the first cooling medium and ensure that the first cooling medium can quickly and evenly remove heat from the motor 100. On the other hand, it can also slow down the aging rate of the first cooling medium, so that it maintains good physical and chemical properties, which is conducive to reducing the replacement frequency of the first cooling medium and saving the maintenance cost of the motor cooling system.

[0093] See also Figure 1 and Figure 4 As shown, an embodiment of the present application further provides a vehicle, comprising: any of the above-mentioned motors 100; or any of the above-mentioned motor cooling systems.

[0094] In the embodiment of the present application, by applying the above-mentioned motor 100 or motor cooling system, it is beneficial to ensure that the motor 100 in the vehicle always operates within a suitable temperature range, which is beneficial to improving the reliability of the vehicle.

[0095] In summary, the motor cooling system provided in the embodiment of the present application includes a first circulation loop and a second circulation loop. In the first circulation loop, the low-temperature first heat exchange medium flows out from the first heat exchange chamber 221 of the heat exchange component 200, enters the liquid separation chamber 141 of the motor 100 after being filtered by the fine filter 800, and enters the cooling channel 1221a through the inlet of the hollow cooling channel 1221a of the wire 1221 under the action of the first driving component 300, and is then ejected from the outlet of the cooling channel 1221a into the liquid collecting chamber 151. The high-temperature first heat exchange medium in the liquid collecting chamber 151 flows out from the second connection and returns to the first heat exchange chamber 221 of the heat exchange component 200, thereby completing one cycle of the first circulation loop. In the second circulation loop, the low-temperature second cooling medium exchanges heat with the high-temperature first cooling medium in the first heat exchange cavity 221 in the second heat exchange cavity 211 of the heat exchange element 200. The temperature of the first cooling medium decreases, while the temperature of the second cooling medium increases. The high-temperature second cooling medium flows out of the second heat exchange cavity 211 and enters the cooling assembly 500 under the action of the second driving element 400. The cooling assembly 500 removes the heat from the second cooling medium to obtain a low-temperature second cooling medium. The low-temperature second cooling medium returns to the second heat exchange cavity 211 of the heat exchange element 200, thus completing one cycle of the second circulation loop. In this way, the first circulation loop and the second circulation loop continuously circulate to continuously inject the low-temperature first cooling medium into the cooling channel 1221a. The first cooling medium and the wire 1221 fully exchange heat to achieve efficient and uniform heat dissipation, which is beneficial to improving the uniformity of heat dissipation of the motor 100 and ensuring the working performance of the motor 100.

[0096] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

[0097] In the description of the embodiments of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on specific circumstances.

[0098] In the embodiments of the present application, any device or element referred to or implied must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise specifically specified.

[0099] The terms "first," "second," "third," "fourth," and so on (if any) in the description and claims of the embodiments of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein.

[0100] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0101] It will be understood that the various numerical numbers involved in the embodiments of the present application are merely distinctions for the convenience of description and are not intended to limit the scope of the embodiments of the present application.

[0102] It can be understood that in the embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0103] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0104] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A motor (100), characterized in that: include: Housing (110); A stator (120), the stator (120) comprising: A stator core (121) is provided in the inner cavity of the housing (110); a rotation space (1211) is defined on the radial inner side of the stator core (121); an axial hole (111) is provided on the housing (110) and is axially opposite to and connected to the rotation space (1211); and a plurality of wire slots are also provided on the stator core (121); The stator winding (122) comprises a plurality of interconnected wires (1221), wherein a plurality of the wires (1221) are provided in each wire slot, and a hollow cooling channel (1221a) is provided inside the wires (1221), and the cooling channel (1221a) is used for circulating a first cooling medium; The rotor (130) is rotatably disposed in the rotating space (1211) and penetrates the shaft hole (111).

2. The motor (100) according to claim 1, characterized in that The wire slots penetrate both ends of the stator core (121) along the axial direction of the stator core (121), and the conducting wires (1221) are arranged in the wire slots along the axial direction of the stator core (121).

3. The motor (100) according to claim 1, characterized in that A liquid separation chamber (141) and a liquid collection chamber (151) are provided in the housing (110); The inlet of the cooling channel (1221a) of each wire (1221) is communicated with the liquid separation chamber (141), and the outlet of the cooling channel (1221a) of each wire (1221) is communicated with the liquid collection chamber (151). The housing (110) is provided with a first communicating hole (1411) communicating with the liquid separation chamber (141) and a second communicating hole (1511) communicating with the liquid collection chamber (151). Both the first communicating hole (1411) and the second communicating hole (1511) are used for communicating with an external pipeline.

4. The motor (100) according to claim 3, characterized in that Also includes: The liquid separation member (140) is provided on a first side of the stator core (121) along the axial direction, and the liquid separation member (140) defines the liquid separation cavity (141).

5. The motor (100) according to claim 4, characterized in that Also includes: The oil baffle (150) is provided on the second side of the stator core (121) along the axial direction, and the oil baffle (150), the stator core (121) and the rotor (130) together define the liquid collecting chamber (151).

6. A motor cooling system, characterized in that: include: A heat exchange member (200), a first drive member (300), a second drive member (400), a cooling assembly (500), and a motor (100) according to any one of claims 1 to 5, The heat exchange element (200) is provided with a first heat exchange channel and a second heat exchange channel. The first driving member (300), the cooling channel (1221a) in the wire (1221) of the motor (100), and the first heat exchange channel are connected via a first pipeline (600) to form a first circulation loop; The second driving member (400), the cooling assembly (500) and the second heat exchange channel are connected via a second pipeline (700) to form a second circulation loop; The first circulation loop is suitable for circulating a first cooling medium, and the second circulation loop is suitable for circulating a second cooling medium.

7. The motor cooling system according to claim 6, characterized in that: The heat exchange element (200) comprises: a heat exchange housing (210), the heat exchange housing (210) being provided with a second heat exchange cavity (211) and a second liquid inlet (2111) and a second liquid outlet (2112) in communication with the second heat exchange cavity (211), the second liquid inlet (2111) and the second liquid outlet (2112) both being in communication with the second pipeline (700); A heat exchange core (220) is provided in the second heat exchange cavity (211); the heat exchange core (220) is provided with a first heat exchange cavity (221) and a first liquid inlet (2211) and a first liquid outlet (2212) in communication with the first heat exchange cavity (221); the first liquid inlet (2211) and the first liquid outlet (2212) are both in communication with the first pipeline (600).

8. The motor cooling system according to claim 7, characterized in that: The second heat exchange cavity (211) surrounds the heat exchange core (220), and the first liquid inlet (2211) and the first liquid outlet (2212) respectively penetrate the heat exchange shell (210) to communicate with the first pipeline (600).

9. The motor cooling system according to claim 7, characterized in that: The heat exchange core (220) is provided with a plurality of heat exchange fins (222), and the plurality of heat exchange fins (222) are distributed at intervals along the axial direction of the heat exchange core (220).

10. The motor cooling system according to claim 6, characterized in that: Also includes: A fine filter (800), the fine filter (800) is provided in the first circulation loop.

11. The motor cooling system according to claim 6, characterized in that: The first cooling medium includes cooling oil; and / or the second cooling medium includes cooling water.

12. A vehicle, characterized in that: include: The motor (100) according to any one of claims 1 to 5; or the motor cooling system according to any one of claims 6 to 11.

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