Electric machine, electric drive, electric drive system and electrically driven device

Abstract

The application provides an electric machine, an electric drive device, an electric drive system and an electric device. The electric machine comprises a shell and a stator. The shell is internally provided with a first cavity for containing a cooling medium. The stator is arranged in the first cavity, and at least part of the stator is immersed in the cooling medium. The electric machine provided by the application is internally provided with the first cavity for containing the cooling medium, and the stator is arranged in the first cavity so that at least part of the stator is immersed in the cooling medium. The cooling medium can directly contact the stator, thereby effectively absorbing the heat generated by the stator, and the cooling efficiency of the electric machine is effectively improved.

Description

[0001] Cross-references

[0002] This application incorporates Chinese Patent Application No. 202310412133.9, filed on April 17, 2023, entitled “Electric Machine, Electric Drive Device, Electric Drive System and Electric Equipment”, which is incorporated herein by reference in its entirety. Technical Field

[0003] This application relates to the field of electric drive technology, specifically to an electric motor, an electric drive device, an electric drive system, and an electric equipment. Background Technology

[0004] An electric motor is a power device used to convert electrical energy into mechanical energy. During the operation of an electric motor, current flows through the stator windings, causing them to generate heat. To prevent overheating and damage, the stator usually needs to be cooled. However, the cooling methods used in current technologies are relatively inefficient, which is detrimental to improving motor performance. Summary of the Invention

[0005] The purpose of this application is to provide a motor, electric drive device, electric drive system, and electric equipment to solve the technical problem of low cooling efficiency of motors in related technologies.

[0006] To achieve the above objectives, the technical solution adopted in this application embodiment is: to provide a motor, comprising:

[0007] The housing has a first cavity inside, which is used to contain the cooling medium;

[0008] The stator is disposed in the first cavity, and at least a portion of the stator is immersed in the cooling medium.

[0009] The motor provided in this application embodiment has at least the following beneficial effects: The motor provided in this application embodiment provides a first cavity for accommodating the cooling medium inside the housing, and the stator is disposed in the first cavity so that at least part of the stator is immersed in the cooling medium, so that the cooling medium can directly contact the stator, thereby effectively absorbing the heat generated by the stator, and thus effectively improving the cooling efficiency of the motor.

[0010] In some embodiments of this application, the motor further includes a rotor, and the interior of the housing is provided with a second cavity that is separated from the first cavity, and the rotor is disposed in the second cavity.

[0011] By adopting the above technical solution, the rotor can be isolated from the cooling medium in the first cavity, thereby improving the situation where the rotor is immersed in the cooling medium, effectively reducing the rotor's rotational loss and effectively improving the motor's working efficiency.

[0012] In some embodiments of this application, the rotor includes a rotor shaft and a rotor disk connected to the rotor shaft. The rotor shaft has a first cooling channel inside, and the first cooling channel is connected to a first cavity.

[0013] By adopting the above technical solution, the cooling medium can flow between the first cavity and the first cooling channel to absorb the heat generated by the stator and the heat generated by the rotor shaft in turn. In this way, not only is the stator cooled, but the rotor is also effectively cooled without the rotor disk being immersed in the cooling medium, thereby further improving the cooling efficiency and working efficiency of the motor.

[0014] In some embodiments of this application, the rotor disk is provided with a second cooling channel inside, one end of the second cooling channel is connected to the first cooling channel, and the other end of the second cooling channel is connected to the second cavity.

[0015] By adopting the above technical solution, the cooling medium can flow between the first cavity, the first cooling channel and the second cooling channel to absorb the heat generated by the stator, the heat generated by the rotor shaft and the heat generated by the rotor disk in sequence. In this way, not only is the stator cooled, but the entire rotor is also cooled, thereby further improving the cooling efficiency of the motor.

[0016] In some embodiments of this application, the end of the second cooling channel away from the first cooling channel penetrates the end face of the rotor disk to communicate with the second cavity.

[0017] By adopting the above technical solution, during the rotor rotation process, the cooling medium will be thrown out into the second cavity along the second cooling channel through the end face of the rotor disk, effectively preventing the cooling medium from flowing back into the second cooling channel under the action of gravity, thereby effectively improving the circulation efficiency of the cooling medium, and further improving the cooling efficiency of the motor.

[0018] In some embodiments of this application, the end of the second cooling channel away from the first cooling channel extends through the opposite two end faces of the rotor disk.

[0019] By adopting the above technical solution, the circulation efficiency of the cooling medium is further improved, thereby further improving the cooling efficiency of the motor.

[0020] In some embodiments of this application, there are multiple second cooling channels arranged around the rotor shaft.

[0021] By adopting the above technical solution, the cooling area of ​​the rotor disk is effectively increased, thereby further improving the cooling efficiency of the rotor, and thus further improving the cooling efficiency of the motor.

[0022] In some embodiments of this application, the rotor shaft wall is provided with a first through hole, and the second cooling channel is connected to the first cooling channel through the first through hole.

[0023] By adopting the above technical solution, the flow of cooling medium between the first cooling channel and the second cooling channel is effectively realized.

[0024] In some embodiments of this application, the cavity wall of the second cavity is provided with a second through hole.

[0025] By adopting the above technical solution, the cooling medium in the second cavity is effectively discharged to the outside, thereby improving the situation where the rotor is immersed in the cooling medium, thus effectively reducing the rotor's rotational loss and effectively improving the motor's working efficiency.

[0026] In some embodiments of this application, the second through hole is formed on the peripheral wall of the second cavity.

[0027] By adopting the above technical solution, during the rotor rotation process, the cooling medium will be thrown onto the peripheral wall of the second cavity along the second cooling channel under the action of centrifugal force, and discharged to the outside of the second cavity through the second through hole, which effectively improves the discharge efficiency of the cooling medium, further improves the situation of the rotor being immersed in the cooling medium, thereby effectively reducing the rotor rotation loss and effectively improving the working efficiency of the motor.

[0028] In some embodiments of this application, there are multiple second through holes, which are arranged around the rotor shaft.

[0029] By adopting the above technical solution, the cooling medium can be discharged more quickly, further improving the situation of the rotor being immersed in the cooling medium, thereby effectively reducing the rotor's rotational loss and effectively improving the motor's working efficiency.

[0030] In some embodiments of this application, the first cavity includes a first cavity and a second cavity, the stator includes a first stator disposed in the first cavity and a second stator disposed in the second cavity, and the second cavity is disposed between the first cavity and the second cavity.

[0031] By adopting the above technical solution, the first stator and the second stator can be in direct contact with the cooling medium, so that the cooling medium can effectively absorb the heat generated by the first stator and the second stator, thereby effectively improving the cooling efficiency of the dual-stator motor.

[0032] In some embodiments of this application, the housing includes an outer shell, an inner shell, a first sealing assembly, and a second sealing assembly. The inner shell includes a first portion, a second portion, and a third portion disposed between the first portion and the second portion. The first portion, the first sealing assembly, and the outer shell enclose a first cavity, and the second portion, the second sealing assembly, and the outer shell enclose a second cavity.

[0033] By adopting the above technical solution, the first cavity and the second cavity are effectively formed.

[0034] In some embodiments of this application, the third part has a second cavity inside, or the third part, the first sealing assembly, the second sealing assembly and the outer shell enclose the second cavity.

[0035] By adopting the above technical solution, a second cavity is effectively formed and the first cavity and the second cavity are separated from each other.

[0036] In some embodiments of this application, the outer casing includes a first inner ring wall and a first outer ring wall disposed around the first inner ring wall;

[0037] The first part includes a second inner ring wall and a second outer ring wall disposed between a first inner ring wall and a first outer ring wall, wherein the second inner ring wall is annularly disposed around the first inner ring wall, and the second outer ring wall is annularly disposed around the second inner ring wall. The first sealing assembly includes a first sealing element and a second sealing element, wherein the first sealing element is disposed between the first outer ring wall and the second outer ring wall, and the second sealing element is disposed between the first inner ring wall and the second inner ring wall; and / or,

[0038] The second part includes a third inner ring wall and a third outer ring wall disposed between the first inner ring wall and the first outer ring wall. The third inner ring wall is disposed around the first inner ring wall, and the third outer ring wall is disposed around the third inner ring wall. The second sealing assembly includes a third sealing element and a fourth sealing element. The third sealing element is disposed between the first outer ring wall and the third outer ring wall, and the fourth sealing element is disposed between the first inner ring wall and the third inner ring wall.

[0039] By adopting the above technical solution, the first cavity and the second cavity are effectively formed.

[0040] In some embodiments of this application, the first cavity and the second cavity are connected.

[0041] By adopting the above technical solution, the cooling medium can flow between the first cavity and the second cavity, effectively reducing the difference between the amount of cooling medium injected into the first cavity and the amount of cooling medium injected into the second cavity, thereby making the overall heat distribution of the motor more balanced and effectively improving the working performance of the motor.

[0042] In some embodiments of this application, the interior of the housing is further provided with a communication channel that is separated from the second cavity, and the first cavity is connected to the second cavity through the communication channel.

[0043] By adopting the above technical solution, the first cavity and the second cavity can be effectively connected.

[0044] In some embodiments of this application, the second cavity includes a third cavity and a fourth cavity, the rotor includes a first rotor disposed in the third cavity and a second rotor disposed in the fourth cavity, and the first cavity is disposed between the third cavity and the fourth cavity.

[0045] By adopting the above technical solution, the stator can directly contact the cooling medium, so that the cooling medium can effectively absorb the heat generated by the stator, thereby effectively improving the cooling efficiency of the dual rotor motor.

[0046] In some embodiments of this application, the housing includes an outer shell, an inner shell, a first sealing assembly, and a second sealing assembly. The inner shell includes a first portion, a second portion, and a third portion disposed between the first portion and the second portion. The third portion, the first sealing assembly, the second sealing assembly, and the outer shell together form a first cavity.

[0047] By adopting the above technical solution, the first cavity is effectively formed.

[0048] In some embodiments of this application, the first part has a third cavity inside, or the first part, the first sealing assembly, and the outer shell enclose and form a third cavity.

[0049] By adopting the above technical solution, a third cavity is effectively formed and the third cavity is separated from the first cavity.

[0050] In some embodiments of this application, the second part has a fourth cavity inside, or the second part, the second sealing assembly, and the outer shell enclose and form a fourth cavity.

[0051] By adopting the above technical solution, a fourth cavity is effectively formed and the fourth cavity is separated from the first cavity.

[0052] In some embodiments of this application, the housing includes a first inner ring wall and a first outer ring wall disposed around the first inner ring wall; the first sealing assembly includes a first seal disposed between the first outer ring wall and one side of the third portion along the axial direction of the motor; the second sealing assembly includes a third seal disposed between the first outer ring wall and the other side of the third portion along the axial direction of the motor.

[0053] By adopting the above technical solution, the first cavity is effectively formed.

[0054] In some embodiments of this application, the housing includes an outer shell and an inner shell disposed within the outer shell, wherein the inner shell has a first cavity and a second cavity inside.

[0055] By adopting the above technical solution, the first cavity and the second cavity are effectively formed and separated from each other.

[0056] In some embodiments of this application, the inner shell includes a shell body and a partition, the partition being disposed within the shell body to divide the internal space of the shell body into a first cavity and a second cavity.

[0057] By adopting the above technical solution, the first cavity and the second cavity are effectively separated from each other.

[0058] In some embodiments of this application, the housing has a cooling medium inlet and a cooling medium outlet communicating with the first cavity. The cooling medium inlet includes a first inlet located on the inner circumferential side of the stator, and the cooling medium outlet is located on the outer circumferential side of the stator.

[0059] By adopting the above technical solution, the cooling medium can enter the inner space of the stator through the first inlet. Then, the cooling medium can flow from the inner circumference of the stator through various gaps in the stator to the outer circumference of the stator. After that, the cooling medium is discharged to the outside of the housing through the cooling medium outlet. This allows the cooling medium to come into more full contact with the stator, thereby more effectively absorbing the heat generated by the stator and further improving the cooling efficiency of the motor.

[0060] In some embodiments of this application, the cooling medium inlet further includes a second inlet communicating with the first cavity, the second inlet being located on the outer periphery of the stator.

[0061] By adopting the above technical solution, the cooling medium can not only enter the inner space of the stator through the first inlet, but also enter the outer space of the stator through the second inlet, so that the cooling medium can come into more full contact with the stator, thereby more effectively absorbing the heat generated by the stator and further improving the cooling efficiency of the motor.

[0062] In some embodiments of this application, the second inlet and the cooling medium outlet are located on opposite sides of the stator along the radial direction.

[0063] By adopting the above technical solution, after the cooling medium enters the outer space of the stator from the second inlet, the cooling medium can flow along the outer circumference of the stator from one side of the stator along the radial direction to the other side of the stator along the same radial direction, and finally be discharged from the cooling medium outlet to the outside of the housing. This allows the cooling medium to come into more full contact with the stator, thereby more effectively absorbing the heat generated by the stator and further improving the cooling efficiency of the motor.

[0064] In some embodiments of this application, the motor further includes a rotor, and the housing is further provided with a second cavity that is separated from the first cavity. The rotor is disposed in the second cavity. The first cavity includes a first cavity and a second cavity. The stator includes a first stator disposed in the first cavity and a second stator disposed in the second cavity. The second cavity is disposed between the first cavity and the second cavity.

[0065] By adopting the above technical solution, the cooling efficiency of the dual-stator single-rotor motor is effectively improved.

[0066] In some embodiments of this application, there are multiple first inlets, at least one first inlet is located on the side of the first stator facing away from the rotor and is connected to the first cavity, and at least another first inlet is located on the side of the second stator facing away from the rotor and is connected to the second cavity.

[0067] By adopting the above technical solution, a portion of the cooling medium can enter the inner space of the first stator through the corresponding first inlet. Subsequently, this portion of the cooling medium can flow from the inner circumference of the first stator through various gaps in the first stator to the outer circumference of the first stator. Similarly, another portion of the cooling medium can enter the inner space of the second stator through the corresponding first inlet. Subsequently, this portion of the cooling medium can flow from the inner circumference of the second stator through various gaps in the second stator to the outer circumference of the second stator. Then, the cooling medium is discharged to the outside of the housing through the cooling medium outlet. This not only allows the cooling medium to have more sufficient contact with the first stator, but also allows the cooling medium to have more sufficient contact with the second stator, thereby more effectively absorbing the heat generated by the first and second stators and further improving the cooling efficiency of the motor.

[0068] In some embodiments of this application, there are multiple second inlets, at least one second inlet is connected to the first cavity, and at least another second inlet is connected to the second cavity.

[0069] By adopting the above technical solution, a portion of the cooling medium can enter the outer space of the first stator through the corresponding second inlet, and another portion of the cooling medium can enter the outer space of the second stator through the corresponding second inlet. Then, the cooling medium is discharged to the outside of the housing through the cooling medium outlet. This allows the cooling medium to come into more full contact with the first and second stators, thereby more effectively absorbing the heat generated by the first and second stators and further improving the cooling efficiency of the motor.

[0070] In some embodiments of this application, the first inlet is located on the side of the stator opposite to the rotor.

[0071] By adopting the above technical solution, it is easy to open the first inlet on the shell.

[0072] In some embodiments of this application, the opening direction of the first inlet is parallel to the axial direction of the rotor.

[0073] By adopting the above technical solution, the flow velocity of the cooling medium inside the stator is effectively increased, thereby effectively increasing the convective heat transfer coefficient between the cooling medium and the stator, so that the cooling medium can more effectively absorb the heat generated by the stator, and further improve the cooling efficiency of the motor.

[0074] In some embodiments of this application, the stator includes an iron core and a winding. The iron core has a winding slot that extends through the inner circumference and outer circumference of the iron core. The winding is wound in the winding slot, and the cooling medium flows from the first inlet through the winding slot to the cooling medium outlet.

[0075] By adopting the above technical solution, the cooling medium can flow from the inside of the stator to the outside of the stator, allowing the cooling medium to come into more full contact with the stator, thereby more effectively absorbing the heat generated by the stator and further improving the cooling efficiency of the motor.

[0076] In some embodiments of this application, the housing is provided with a cooling medium inlet and a cooling medium outlet communicating with the first cavity, and the height of the cooling medium inlet is less than the height of the cooling medium outlet.

[0077] By adopting the above technical solution, the cooling medium flows into the first cavity from the lower part of the shell and flows out of the first cavity from the higher part of the shell. In this way, the gas in the first cavity is effectively discharged to the outside, which effectively improves the air entrapment phenomenon of the cooling medium and further improves the cooling efficiency of the motor.

[0078] In some embodiments of this application, the cooling medium inlet is located at the bottom of the housing, and the cooling medium outlet is located at the top of the housing.

[0079] By adopting the above technical solution, the air entrapment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of the motor.

[0080] This application also provides an electric drive device, including a liquid supply mechanism and a motor as described in any of the above embodiments. The liquid supply mechanism is connected to a first cavity to deliver a cooling medium into the first cavity.

[0081] The electric drive device provided in this application embodiment has at least the following beneficial effects: Since the electric drive device provided in this application embodiment adopts the motor described in any of the above embodiments, the cooling efficiency of the electric drive device is effectively improved, which is conducive to improving the working performance of the electric drive device.

[0082] In some embodiments of this application, the liquid supply mechanism includes an inlet pipe and a check valve. The inlet pipe is connected to the first cavity, and the check valve is disposed on the inlet pipe to allow the cooling medium to flow from the inlet pipe to the first cavity.

[0083] By adopting the above technical solution, the backflow of the cooling medium after entering the first cavity is effectively improved, so as to ensure that the first cavity contains enough cooling medium and the stator is fully immersed in the cooling medium, thereby further improving the cooling efficiency of the motor.

[0084] In some embodiments of this application, the liquid supply mechanism includes a power pump, a first mounting space is provided on the housing, and the power pump is mounted in the first mounting space; and / or,

[0085] The liquid supply mechanism includes a heat exchanger, and a second mounting space is provided on the housing, within which the heat exchanger is installed; and / or,

[0086] The liquid supply mechanism includes a filter, and a third mounting space is provided on the housing, in which the filter is installed.

[0087] By adopting the above technical solution, the integration of the motor is effectively improved, thereby effectively reducing the size of the electric drive device.

[0088] This application also provides an electric drive device, including a flow guiding mechanism and a motor as described in any of the above embodiments, wherein the first cavity is connected to the first cooling channel through the flow guiding mechanism.

[0089] The electric drive device provided in this application embodiment has at least the following beneficial effects: Since the electric drive device provided in this application embodiment adopts the motor described in any of the above embodiments, the cooling efficiency of the electric drive device is effectively improved, which is conducive to improving the working performance of the electric drive device.

[0090] In some embodiments of this application, the flow guiding mechanism includes a flow guiding element, the flow guiding element having a flow guiding channel inside, and the first cavity being connected to the first cooling channel through the flow guiding channel.

[0091] By adopting the above technical solution, the cooling medium can be effectively flowed between the first cavity and the first cooling channel, thereby achieving cooling of the stator and rotor.

[0092] In some embodiments of this application, the draining element includes a draining body and a plug-in portion connected to the draining body, the draining channel passes through the draining body and the plug-in portion, and the plug-in portion is inserted into the first cooling channel.

[0093] By adopting the above technical solution, the cooling medium is effectively injected into the first cooling channel, thereby effectively improving the reliability of cooling the motor rotor.

[0094] In some embodiments of this application, the electric drive device further includes a speed change mechanism, and the diversion mechanism further includes a diverter. The diverter is provided with a first diversion channel and a second diversion channel. One end of the first diversion channel and one end of the second diversion channel are connected to the first cavity, the other end of the first diversion channel is connected to the diversion channel, and the other end of the second diversion channel is connected to the speed change mechanism.

[0095] By adopting the above technical solution, the cooling medium discharged from the first cavity can not only flow into the first cooling channel to cool the rotor, but also flow into the transmission mechanism to cool and lubricate multiple components in the transmission mechanism, so that the cooling medium is fully utilized and the working performance of the electric drive device is improved.

[0096] In some embodiments of this application, the housing is provided with a first bearing seat, and a first cooling channel is connected to the first bearing seat.

[0097] By adopting the above technical solution, the cooling medium discharged from the first cooling channel can flow into the first bearing housing to cool and lubricate the components installed in the first bearing housing, so that the cooling medium is fully utilized and the working performance of the electric drive device is improved.

[0098] In some embodiments of this application, the housing is provided with a flow channel, one end of which is connected to the first cooling channel and the other end of which is connected to the first bearing seat.

[0099] By adopting the above technical solution, the first cooling channel and the first bearing housing are effectively connected, and the structure of the motor becomes more compact, thereby effectively reducing the size of the electric drive device.

[0100] In some embodiments of this application, the electric drive device further includes a speed change mechanism, which includes a shaft rotatably mounted on a first bearing housing.

[0101] By adopting the above technical solution, the shaft of the transmission mechanism can be effectively cooled and lubricated.

[0102] In some embodiments of this application, the shaft is a power output shaft.

[0103] By adopting the above technical solution, the power output shaft of the transmission mechanism can be effectively cooled and lubricated.

[0104] This application also provides an electric drive system, including a battery and an electric drive device as described in any of the above embodiments, wherein the battery is electrically connected to the electric drive device.

[0105] The electric drive system provided in this application embodiment has at least the following beneficial effects: the electric drive system provided in this application embodiment, by adopting the electric drive device described in any of the above embodiments, effectively improves the cooling efficiency of the electric drive system, which is conducive to improving the working performance of the electric drive system.

[0106] This application also provides an electric device, including the above-described electric drive system.

[0107] The electric device provided in this application embodiment has at least the following beneficial effects: the electric device provided in this application embodiment adopts the electric drive system described in any of the above embodiments, which effectively improves the cooling efficiency of the electric device and helps to improve the working performance of the electric device. Attached Figure Description

[0108] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0109] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application;

[0110] Figure 2 This is a schematic diagram of the exploded structure of a battery provided in an embodiment of this application;

[0111] Figure 3 This is a schematic diagram of the structure of the electric drive device provided in the embodiments of this application;

[0112] Figure 4 for Figure 3 The diagram shows the main structural view of the electric drive device.

[0113] Figure 5 for Figure 4 Schematic cross-sectional view of the motor in the electric drive device shown along line AA. Figure 1 ;

[0114] Figure 6 for Figure 4 Schematic cross-sectional view of the motor in the electric drive device shown along line AA. Figure 2 ;

[0115] Figure 7 for Figure 4 Schematic cross-sectional view of the motor in the electric drive device shown along line AA. Figure 3 ;

[0116] Figure 8 for Figure 4 Schematic cross-sectional view of the motor in the electric drive device shown along line AA. Figure 4 ;

[0117] Figure 9 for Figure 4 Schematic cross-sectional view of the motor in the electric drive device shown along line AA. Figure 5 ;

[0118] Figure 10 for Figure 9 The diagram shows the structural schematic of the cooling medium flow path in the motor.

[0119] Figure 11 This is a schematic diagram of the cooling principle structure of the electric drive device provided in the embodiments of this application;

[0120] Figure 12 This is a schematic diagram of the structure of the drainage device provided in the embodiments of this application;

[0121] Figure 13 This is a schematic diagram of the structure of the diversion component provided in the embodiments of this application;

[0122] Figure 14 This is a schematic diagram of the structure of the outer casing provided in an embodiment of this application.

[0123] The following are the labeling elements in the figure:

[0124] 1000, vehicles;

[0125] 100. Electric drive system;

[0126] 10. Electric drive unit;

[0127] 11. Motor; 111. Housing; 1111. Outer shell; 11111. First outer ring wall; 11112. First inner ring wall; 11113. First mounting space; 11114. Second mounting space; 11115. Third mounting space; 11116. First bearing seat; 11117. Guide channel; 11118. Second bearing seat; 1112. Inner shell; 11121. Partition; 11122. First part; 11123. Second part; 11124. Third part; 11125. Second outer ring wall; 11126. Second inner ring wall; 11127. Third outer ring wall; 11128. Third inner ring wall; 1113. First cavity; 11131. First cavity; 11132. Second cavity; 1114. Second cavity; 11141. Second through hole; 11142. Three-chamber structure; 11143, Fourth chamber; 1115, First sealing assembly; 11151, First seal; 11152, Second seal; 1116, Second sealing assembly; 11161, Third seal; 11162, Fourth seal; 1117, Connecting channel; 1118, Cooling medium inlet; 1118a, First inlet; 1118b, Second inlet; 1119, Cooling medium outlet; 112, Stator; 112a, First stator; 112b, Second stator; 1121, Core; 11211, Winding slot; 1122, Winding; 113, Rotor; 113a, First rotor; 113b, Second rotor; 1131, Rotor shaft; 11311, First cooling channel; 11312, First through hole; 1132, Rotor disk; 11321, Second cooling channel;

[0128] 12. Liquid supply mechanism; 121. Power pump; 122. Heat exchanger; 123. Filter; 124. Liquid inlet pipeline; 125. Check valve;

[0129] 13. Drainage mechanism; 131. Drainage component; 1311. Drainage channel; 1312. Drainage body; 1313. Insertion part; 132. Diverting component; 1321. First diverting channel; 1322. Second diverting channel; 1323. Collection channel;

[0130] 14. Transmission mechanism;

[0131] 20. Battery;

[0132] 21. Battery box; 211. First box; 212. Second box;

[0133] 22. Battery cell;

[0134] 200. Vehicle body;

[0135] 300. Cooling medium container. Detailed Implementation

[0136] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0137] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0138] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0139] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0140] An electric motor is the power unit of an electrical device, used to convert electrical energy into mechanical energy to drive the device. During operation, current flows through the stator windings, generating heat. Therefore, to prevent overheating and damage, the stator is typically cooled.

[0141] In related technologies, the walls of the motor housing are provided with cooling channels for the flow of cooling medium. During motor operation, the heat generated by the stator is transferred to the motor housing via air. As the cooling medium continuously flows within the cooling channels, it carries away the heat from the housing, thus cooling the motor. However, because the heat generated by the stator must pass through the air and the motor housing sequentially before being transferred to the cooling medium, the thermal conductivity is low. This results in the heat on the stator not being quickly absorbed by the cooling medium, leading to low cooling efficiency and hindering the improvement of motor performance.

[0142] To improve the cooling efficiency of the motor, the motor provided in this application embodiment has a first cavity inside the housing for accommodating a cooling medium, and the stator is disposed in the first cavity so that at least part of the stator is immersed in the cooling medium, so that the cooling medium can directly contact the stator, thereby effectively absorbing the heat generated by the stator and thus effectively improving the cooling efficiency of the motor.

[0143] The motor provided in this application embodiment can be applied to electric equipment, which can be, but is not limited to, vehicles, ships, airplanes, spacecraft, excavators, cranes, elevators, etc., and is not specifically limited here.

[0144] For ease of explanation, the following embodiments will use a vehicle as an example of the electric device in one embodiment of this application.

[0145] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in an embodiment of this application. According to the power source, the vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. According to the drive method, the vehicle 1000 can be a front-wheel drive vehicle, a rear-wheel drive vehicle, or a four-wheel drive vehicle. The vehicle 1000 includes a body 200 and an electric drive system 100.

[0146] The vehicle body 200 is the main supporting component of the vehicle 1000. The vehicle body 200 has an engine compartment and a passenger compartment. The engine compartment houses the vehicle 1000's power system, electronic control system, transmission system, etc., while the passenger compartment provides operating and seating space for the driver and passengers. When the vehicle 1000 is a front-wheel-drive vehicle, the engine compartment is located at the front of the vehicle body 200, i.e., the front engine compartment; when the vehicle 1000 is a rear-wheel-drive vehicle, the engine compartment is located at the rear of the vehicle body 200, i.e., the rear engine compartment; when the vehicle 1000 is a four-wheel-drive vehicle, the engine compartment is divided into a front engine compartment and a rear engine compartment, with the front engine compartment located at the front of the vehicle body 200 and the rear engine compartment located at the rear of the vehicle body 200. The passenger compartment is located between the front and rear of the vehicle body 200.

[0147] The electric drive system 100 is the power system of the vehicle 1000. The electric drive system 100 is used to convert electrical energy into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive system 100 is installed on the vehicle body 200. Specifically, a part of the electric drive system 100 can be installed in the engine compartment, and another part of the electric drive system 100 can be installed at the bottom of the vehicle body 200.

[0148] Please see Figure 1 The electric drive system 100 provided in this application embodiment includes a battery 20 and an electric drive device 10.

[0149] Battery 20 provides electrical power to electric drive unit 10, and battery 20 may be located at the bottom, front, or rear of vehicle 1000. See also... Figure 2 , Figure 2 This is an exploded view of the battery 20 provided in an embodiment of this application. The battery 20 includes a battery case 21 and battery cells 22, with the battery cells 22 housed within the battery case 21. The battery case 21 provides a space for the battery cells 22 and can have various structures. In some embodiments, the battery case 21 may include a first housing 211 and a second housing 212, which overlap each other, jointly defining a space for accommodating the battery cells 22. The second housing 212 may be a hollow structure with one open end, while the first housing 211 may be a plate-like structure, covering the open side of the second housing 212 so that the first housing 211 and the second housing 212 jointly define the space. Alternatively, both the first housing 211 and the second housing 212 may be hollow structures with one open side, with the open side of the first housing 211 covering the open side of the second housing 212. Of course, the battery box 21 formed by the first box 211 and the second box 212 can be of various shapes, such as cylinder, cuboid, etc.

[0150] In some embodiments, the battery box 21 may be part of the chassis structure of the vehicle 1000. For example, a portion of the battery box 21 may be at least a portion of the floor of the vehicle 1000, or a portion of the battery box 21 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0151] Of course, in some embodiments, the battery 20 may not include the battery box 21, but rather multiple battery cells 22 are electrically connected and assembled into the vehicle 1000 after being formed into a whole by necessary fixing structures.

[0152] In battery 20, there can be multiple battery cells 22, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 22 are connected in both series and parallel configurations. Multiple battery cells 22 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 22 is housed within battery box 21. Alternatively, battery 20 can also consist of multiple battery cells 22 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within battery box 21. Battery 20 may also include other functional components; for example, it may include a busbar for electrical connection between multiple battery cells 22.

[0153] Each battery cell 22 can be a secondary battery or a primary battery. A secondary battery is one that can be recharged to activate its active materials and continue to be used after being discharged. A primary battery is one that cannot be recharged to activate its active materials and continue to be used after its electrical energy is depleted. The battery cell 22 can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., but is not limited to these. The battery cell 22 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries, etc. This application does not have any particular limitations.

[0154] The electric drive unit 10 is used to convert the electrical energy provided by the battery 20 into mechanical energy and output the mechanical energy to the wheels of the vehicle 1000 to drive the vehicle 1000. The electric drive unit 10 is installed in the engine compartment. Specifically, when the vehicle 1000 is a front-wheel drive vehicle, the electric drive unit 10 is installed in the front engine compartment and is used to output the aforementioned mechanical energy to the front wheels of the vehicle 1000 to drive the vehicle 1000; when the vehicle 1000 is a rear-wheel drive vehicle, the electric drive unit 10 is installed in the rear engine compartment and is used to output the aforementioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000; when the vehicle 1000 is a four-wheel drive vehicle, there are two electric drive units 10, one electric drive unit 10 is installed in the front engine compartment and is used to output the aforementioned mechanical energy to the front wheels of the vehicle 1000, and the other electric drive unit 10 is installed in the rear engine compartment and is used to output the aforementioned mechanical energy to the rear wheels of the vehicle 1000 to drive the vehicle 1000.

[0155] The electric drive unit 10 includes a motor 11, which is the main power output component of the electric drive unit 10, used to convert the electrical energy provided by the battery 20 into mechanical energy. The electric drive unit 10 may also include a transmission mechanism 14, which is the power transmission mechanism of the electric drive unit 10. The transmission mechanism 14 has a power input end and a power output end. The power input end of the transmission mechanism 14 is connected to the shaft of the motor 11, and the power output end of the transmission mechanism 14 is connected to the wheels of the vehicle 1000, so as to transmit the aforementioned mechanical energy to the wheels of the vehicle 1000 by changing the speed and torque of the motor 11. The electric drive unit 10 may also include a controller, which is used to convert the direct current output by the battery 20 into alternating current and transmit the alternating current to the motor 11, and to control the operation of the motor 11, such as controlling the start / stop, speed, and torque of the motor 11.

[0156] The motor 11 provided in the embodiments of this application will be described below with reference to the accompanying drawings.

[0157] Please refer to the following: Figures 3 to 9 This application provides an electric motor 11, including a housing 111 and a stator 112. The housing 111 has a first cavity 1113 inside, which is used to contain a cooling medium. The stator 112 is disposed in the first cavity 1113, and at least a portion of the stator 112 is immersed in the cooling medium.

[0158] The housing 111 is a component used to provide an internal mounting environment for the motor 11, wherein the first cavity 1113 is part of the internal mounting environment of the motor 11, and the stator 112 and the cooling medium are housed within the first cavity 1113. Optionally, the housing 111 can be a one-piece molded component or an assembled component composed of multiple parts. The material of the housing 111 can be, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, when the housing 111 includes multiple parts, some parts of the housing 111 can be made of metals such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., while other parts of the housing 111 can be made of plastic; no specific limitation is made here.

[0159] The cooling medium is used to absorb the heat generated by the stator 112 and other heat-generating components. The cooling medium can be stationary in the first cavity 1113, or it can enter the first cavity 1113 during circulation. Optionally, the cooling medium can be, but is not limited to, cooling oil, cooling water, etc., and is not specifically limited here.

[0160] The stator 112 is the fixed part of the motor 11 and is used to drive the rotating part of the motor 11 to rotate. The stator 112 can be partially or completely immersed in the cooling medium.

[0161] The motor 11 provided in this application embodiment has a first cavity 1113 for accommodating the cooling medium inside the housing 111, and the stator 112 is disposed in the first cavity 1113 so that at least part of the stator 112 is immersed in the cooling medium, so that the cooling medium can directly contact the stator 112, thereby effectively absorbing the heat generated by the stator 112, and thus effectively improving the cooling efficiency of the motor 11.

[0162] Please refer to some embodiments of this application as well. Figures 5 to 9 The motor 11 also includes a rotor 113, and the housing 111 is further provided with a second cavity 1114 that is separated from the first cavity 1113, and the rotor 113 is disposed in the second cavity 1114.

[0163] The rotor 113 is the rotating part of the motor 11.

[0164] The second cavity 1114 is part of the internal mounting environment of the motor 11. The separation of the first cavity 1113 and the second cavity 1114 means that the cooling medium in the first cavity 1113 cannot directly enter the second cavity 1114. For example, a partition can be provided inside the housing 111 to divide at least a portion of the internal mounting space of the housing 111 to form the aforementioned first cavity 1113 and second cavity 1114. In this embodiment, the first cavity 1113 and the second cavity 1114 are distributed along the axial direction of the motor 11. Of course, in other embodiments, the first cavity 1113 and the second cavity 1114 are also distributed along the radial direction of the motor 11.

[0165] By adopting the above technical solution, the rotor 113 can be isolated from the cooling medium in the first cavity 1113, thereby improving the situation where the rotor 113 is immersed in the cooling medium, effectively reducing the rotational loss of the rotor 113 and effectively improving the working efficiency of the motor 11.

[0166] Please refer to some embodiments of this application as well. Figures 5 to 9 The rotor 113 includes a rotor shaft 1131 and a rotor disk 1132 connected to the rotor shaft 1131. The rotor shaft 1131 has a first cooling channel 11311 inside, which is connected to the first cavity 1113.

[0167] The rotor shaft 1131 is a component used to transmit the aforementioned mechanical energy outward. The rotor disk 1132 is a component used to interact with the stator 112 to generate an electromagnetic induction effect. Under the action of the electromagnetic induction effect, the rotor disk 1132 rotates about the central axis of the rotor shaft 1131. Understandably, the rotor shaft 1131 is fixedly connected to the center position of the rotor disk 1132.

[0168] The first cooling channel 11311 provides a flow path for the cooling medium within the rotor shaft 1131. In this embodiment, the first cooling channel 11311 extends along a direction parallel to the central axis of the rotor shaft 1131. Of course, in other embodiments, the first cooling channel 11311 may extend obliquely relative to the central axis of the rotor shaft 1131, or it may extend perpendicularly to the central axis of the rotor shaft 1131, or it may extend partially parallel to the central axis of the rotor shaft 1131 and partially obliquely relative to the central axis of the rotor shaft 1131, or it may extend partially parallel to the central axis of the rotor shaft 1131 and partially perpendicularly to the central axis of the rotor shaft 1131. In some embodiments, the first cooling channel 11311 extends through one end of the rotor shaft 1131. In some embodiments, the first cooling channel 11311 extends through both ends of the rotor shaft 1131.

[0169] The connection between the first cooling channel 11311 and the first cavity 1113 means that at least a portion of the cooling medium in the first cavity 1113 can enter the first cooling channel 11311 through a necessary connecting structure. This connecting structure can be located inside the housing 111; for example, a channel can be provided inside the housing 111 to connect the first cooling channel 11311 and the first cavity 1113. Alternatively, the connecting structure can be located outside the housing 111; for example, a pipe can be provided outside the housing 111 to connect the first cooling channel 11311 and the first cavity 1113.

[0170] By adopting the above technical solution, the cooling medium can flow between the first cavity 1113 and the first cooling channel 11311 to absorb the heat generated by the stator 112 and the heat generated by the rotor shaft 1131 in turn. In this way, not only is the stator 112 cooled, but the rotor 113 is also effectively cooled without the rotor disk 1132 being immersed in the cooling medium, thereby further improving the cooling efficiency and working efficiency of the motor 11.

[0171] Please refer to some embodiments of this application as well. Figures 5 to 9 The rotor disk 1132 has a second cooling channel 11321 inside. One end of the second cooling channel 11321 is connected to the first cooling channel 11311, and the other end of the second cooling channel 11321 is connected to the second cavity 1114.

[0172] The second cooling channel 11321 provides a flow path for the cooling medium within the rotor disk 1132. In this embodiment, the second cooling channel 11321 extends in a direction parallel to the radial direction of the rotor disk 1132. Of course, in other embodiments, the second cooling channel 11321 may extend obliquely relative to the radial direction of the rotor disk 1132, or in a direction perpendicular to the radial direction of the rotor disk 1132, or partially extend in a direction parallel to the radial direction of the rotor disk 1132 and partially extend obliquely relative to the radial direction of the rotor disk 1132, or partially extend in a direction parallel to the radial direction of the rotor disk 1132 and partially extend in a direction perpendicular to the radial direction of the rotor disk 1132.

[0173] The connection between the second cooling channel 11321 and the first cooling channel 11311 means that at least a portion of the cooling medium in the first cooling channel 11311 can enter the second cooling channel 11321 through the necessary connecting structure. The connection between the second cooling channel 11321 and the second cavity 1114 means that at least a portion of the cooling medium in the second cooling channel 11321 can enter the second cavity 1114 through the necessary connecting structure. In other words, at least a portion of the cooling medium in the first cavity 1113 can enter the second cavity 1114 through both the first cooling channel 11311 and the second cooling channel 11321.

[0174] By adopting the above technical solution, the cooling medium can flow between the first cavity 1113, the first cooling channel 11311, and the second cooling channel 11321 to absorb the heat generated by the stator 112, the heat generated by the rotor shaft 1131, and the heat generated by the rotor disk 1132 in sequence. In this way, not only is the stator 112 cooled, but the rotor 113 is also cooled as a whole, thereby further improving the cooling efficiency of the motor 11.

[0175] Please refer to some embodiments of this application as well. Figures 5 to 9 The end of the second cooling channel 11321 away from the first cooling channel 11311 passes through the end face of the rotor disk 1132 to communicate with the second cavity 1114.

[0176] The end face of rotor disk 1132 refers to the surface of rotor disk 1132 distributed along the axial direction of rotor shaft 1131. The end of the second cooling channel 11321 away from the first cooling channel 11311 penetrating the end face of rotor disk 1132 means that the port of the second cooling channel 11321 away from the first cooling channel 11311 is formed on the end face of rotor disk 1132.

[0177] Understandably, when the axis of the motor 11 is parallel to the ground plane, if the end of the second cooling channel 11321 away from the first cooling channel 11311 penetrates the outer peripheral surface of the rotor disk 1132 and communicates with the second cavity 1114, during the rotation of the rotor disk 1132, the cooling medium is thrown out from the second cooling channel 11321 to the peripheral wall of the second cavity 1114. Subsequently, the cooling medium is likely to fall off under the action of gravity and re-enter the second cooling channel 11321, causing the cooling medium to flow back into the second cooling channel 11321.

[0178] Compared to the above, by passing the end of the second cooling channel 11321 away from the first cooling channel 11311 through the end face of the rotor disk 1132 to connect with the second cavity 1114, during the rotation of the rotor 113, the cooling medium will be thrown out into the second cavity 1114 along the second cooling channel 11321 through the end face of the rotor disk 1132, effectively preventing the cooling medium from flowing back into the second cooling channel 11321 under the action of gravity, thereby effectively improving the circulation efficiency of the cooling medium, and further improving the cooling efficiency of the motor 11.

[0179] Please refer to some embodiments of this application as well. Figures 5 to 9 The end of the second cooling channel 11321 that is away from the first cooling channel 11311 passes through the opposite two end faces of the rotor disk 1132.

[0180] By adopting the above technical solution, the circulation efficiency of the cooling medium is further improved, thereby further improving the cooling efficiency of the motor 11.

[0181] Of course, in other embodiments, the end of the second cooling channel 11321 away from the first cooling channel 11311 penetrates the outer peripheral surface of the rotor disk 1132.

[0182] In some embodiments of this application, there are multiple second cooling channels 11321, and the multiple second cooling channels 11321 are arranged around the rotor shaft 1131.

[0183] In this embodiment, multiple second cooling channels 11321 are uniformly distributed around the rotor shaft 1131. Of course, in other embodiments, the multiple second cooling channels 11321 are not uniformly distributed around the rotor shaft 1131. It should be noted that the number of second cooling channels 11321 can be set according to actual application needs; the number of second cooling channels 11321 can be two, three, four, five, etc., and is not specifically limited here.

[0184] By adopting the above technical solution, the cooling area of ​​rotor disk 1132 is effectively increased, thereby further improving the cooling efficiency of rotor 113, and further improving the cooling efficiency of motor 11.

[0185] Please refer to some embodiments of this application as well. Figures 5 to 9 The rotor shaft 1131 has a first through hole 11312 in its wall, and the second cooling channel 11321 is connected to the first cooling channel 11311 through the first through hole 11312.

[0186] The first through hole 11312 refers to the hole that penetrates the inner and outer sides of the wall of the rotor shaft 1131. When there are multiple second cooling channels 11321, there are also multiple first through holes 11312, with each through hole corresponding to a different second cooling channel 11321. Optionally, the shape of the first through hole 11312 can be, but is not limited to, circular, square, triangular, etc., and is not specifically limited here.

[0187] By adopting the above technical solution, the flow of cooling medium between the first cooling channel 11311 and the second cooling channel 11321 is effectively realized.

[0188] Please refer to some embodiments of this application as well. Figures 5 to 9 The cavity wall of the second cavity 1114 has a second through hole 11141.

[0189] The second through hole 11141 is a port used to communicate the second cavity 1114 with other spaces besides the first cavity 1113. In other words, the cooling medium in the second cavity 1114 can enter other spaces besides the first cavity 1113 through the second through hole 11141. Optionally, the shape of the second through hole 11141 can be, but is not limited to, circular, square, triangular, etc., and is not specifically limited here.

[0190] In some embodiments, the second through hole 11141 is connected to the cooling medium container 300. In other words, after the cooling medium flows through the rotor 113, it can flow back to the cooling medium container 300 through the second through hole 11141.

[0191] By adopting the above technical solution, the cooling medium in the second cavity 1114 is effectively discharged to the outside, thereby improving the situation where the rotor 113 is immersed in the cooling medium, thus effectively reducing the rotational loss of the rotor 113 and effectively improving the working efficiency of the motor 11.

[0192] Please refer to some embodiments of this application as well. Figures 5 to 9 The second through hole 11141 is opened on the peripheral wall of the second cavity 1114.

[0193] The aforementioned peripheral wall refers to the wall surrounding the rotor shaft 1131.

[0194] By adopting the above technical solution, during the rotation of rotor 113, the cooling medium will be thrown onto the peripheral wall of the second cavity 1114 along the second cooling channel 11321 under the action of centrifugal force, and discharged to the outside of the second cavity 1114 through the second through hole 11141. This effectively improves the discharge efficiency of the cooling medium, further improves the situation of rotor 113 being immersed in the cooling medium, thereby effectively reducing the rotational loss of rotor 113 and effectively improving the working efficiency of motor 11.

[0195] Please refer to some embodiments of this application as well. Figures 5 to 9 There are multiple second through holes 11141, and the multiple second through holes 11141 are arranged around the rotor shaft 1131.

[0196] In this embodiment, a plurality of second through holes 11141 are evenly distributed around the rotor shaft 1131. Of course, in other embodiments, the plurality of second through holes 11141 are not evenly distributed around the rotor shaft 1131. It should be noted that the number of second through holes 11141 can be set according to actual application needs, and the number of second cooling channels 11321 can be two, three, four, five, etc., and is not specifically limited here.

[0197] By adopting the above technical solution, the cooling medium can be discharged more quickly, further improving the situation of the rotor 113 being immersed in the cooling medium, thereby effectively reducing the rotational loss of the rotor 113 and effectively improving the working efficiency of the motor 11.

[0198] Please refer to some embodiments of this application as well. Figure 5 and Figure 6 The first cavity 1113 includes a first cavity 11131 and a second cavity 11132. The stator 112 includes a first stator 112a disposed in the first cavity 11131 and a second stator 112b disposed in the second cavity 11132. The second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132.

[0199] The second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132, that is, the rotor 113 is disposed between the first stator 112a and the second stator 112b. In other words, in this embodiment, the motor 11 is a dual-stator single-rotor motor. The first cavity 11131 and the second cavity 1114 are separated from each other, and the second cavity 11132 and the second cavity 1114 are separated from each other.

[0200] By adopting the above technical solution, the first stator 112a and the second stator 112b can be in direct contact with the cooling medium, so that the cooling medium can effectively absorb the heat generated by the first stator 112a and the second stator 112b, thereby effectively improving the cooling efficiency of the dual stator 112 motor 11.

[0201] In some embodiments of this application, please refer to Figure 6The housing 111 includes an outer shell 1111, an inner shell 1112, a first sealing assembly 1115, and a second sealing assembly 1116. The inner shell 1112 includes a first part 11122, a second part 11123, and a third part 11124 disposed between the first part 11122 and the second part 11123. The first part 11122, the first sealing assembly 1115, and the outer shell 1111 enclose a first cavity 11131. The second part 11123, the second sealing assembly 1116, and the outer shell 1111 enclose a second cavity 11132.

[0202] The first part 11122, the third part 11124, and the second part 11123 of the inner shell 1112 are three parts of the inner shell 1112 distributed along the axial direction of the motor 11.

[0203] The first sealing assembly 1115 is an assembly used to seal the gap between the first part 11122 and the inner wall of the outer casing 1111, so as to prevent the cooling medium in the first cavity 11131 from directly entering the second cavity 1114.

[0204] The second sealing assembly 1116 is an assembly used to seal the gap between the second part 11123 and the inner wall of the outer casing 1111, so as to prevent the cooling medium in the second cavity 11132 from directly entering the second cavity 1114.

[0205] By adopting the above technical solution, the first cavity 11131 and the second cavity 11132 are effectively formed.

[0206] In some embodiments of this application, please refer to Figure 6 The third part 11124 has a second cavity 1114 inside, or the third part 11124, the first sealing assembly 1115, the second sealing assembly 1116 and the outer shell 1111 enclose the second cavity 1114.

[0207] In other words, the second cavity 1114 can be directly formed within the third part 11124. For example, the third part 11124 is integrally formed with the second cavity 1114 by injection molding. The second cavity 1114 can also be formed by the third part 11124, the first sealing component 1115, the second sealing component 1116, and the outer shell 1111 enclosing each other.

[0208] By adopting the above technical solution, the second cavity 1114 is effectively formed and the first cavity 1113 and the second cavity 1114 are separated from each other.

[0209] In some embodiments of this application, please refer to Figure 6The outer casing 1111 includes a first inner ring wall 11112 and a first outer ring wall 11111 surrounding the first inner ring wall 11112. The first part 11122 includes a second inner ring wall 11126 and a second outer ring wall 11125 disposed between the first inner ring wall 11112 and the first outer ring wall 11111. The second inner ring wall 11126 is surrounding the first inner ring wall 11112, and the second outer ring wall 11125 is surrounding the second inner ring wall 11126. The first sealing assembly 1115 includes a first sealing element 11151 and a second sealing element 11152. The first sealing element 11151 is disposed between the first outer ring wall 11111 and the second outer ring wall 11125, and the second sealing element 11152 is disposed between the first inner ring wall 11112 and the second inner ring wall 11126.

[0210] The first inner annular wall 11112 provides space for the rotor shaft 1131 to extend out; in other words, at least a portion of the rotor shaft 1131 passes through the annular space of the first inner annular wall 11112. The first outer annular wall 11111 is disposed around the first inner annular wall 11112, i.e., the first inner annular wall 11112 is disposed within the annular space of the first outer annular wall 11111. In some embodiments, a bearing is installed within the annular space of the first inner annular wall 11112, and at least a portion of the rotor shaft 1131 is installed within the bearing.

[0211] The second inner ring wall 11126 is arranged around the first inner ring wall 11112, that is, at least a portion of the first inner ring wall 11112 is disposed within the annular space of the second inner ring wall 11126. The second outer ring wall 11125 is arranged around the second inner ring wall 11126, that is, the second inner ring wall 11126 is disposed within the annular space of the second outer ring wall 11125. In general, the first inner ring wall 11112, the second inner ring wall 11126, the second outer ring wall 11125, and the first outer ring wall 11111 are nested sequentially along the radial direction of the motor 11.

[0212] The first sealing element 11151 is a component used to seal the gap between the first outer ring wall 11111 and the second outer ring wall 11125. The material of the first sealing element 11151 can be, but is not limited to, rubber, silicone, sealant, etc., and is not specifically limited here. In this embodiment, the first sealing element 11151 has a ring-shaped structure, and the first sealing element 11151 is sleeved on the outer peripheral side of the second outer ring wall 11125 and pressed against the gap between the first outer ring wall 11111 and the second outer ring wall 11125.

[0213] The second sealing element 11152 is a component used to seal the gap between the first inner ring wall 11112 and the second inner ring wall 11126. The material of the second sealing element 11152 can be, but is not limited to, rubber, silicone, sealant, etc., and is not specifically limited here. In this embodiment, the second sealing element 11152 has a ring-shaped structure, and is sleeved on the outer periphery of the first inner ring wall 11112 and pressed against the space between the first inner ring wall 11112 and the second inner ring wall 11126.

[0214] In some embodiments of this application, please refer to Figure 6 The outer casing 1111 includes a first inner ring wall 11112 and a first outer ring wall 11111 surrounding the first inner ring wall 11112. The second part 11123 includes a third inner ring wall 11128 and a third outer ring wall 11127 disposed between the first inner ring wall 11112 and the first outer ring wall 11111. The third inner ring wall 11128 is surrounding the first inner ring wall 11112, and the third outer ring wall 11127 is surrounding the third inner ring wall 11128. The second sealing assembly 1116 includes a third sealing element 11161 and a fourth sealing element 11162. The third sealing element 11161 is disposed between the first outer ring wall 11111 and the third outer ring wall 11127, and the fourth sealing element 11162 is disposed between the first inner ring wall 11112 and the third inner ring wall 11128.

[0215] The third inner ring wall 11128 is arranged around the first inner ring wall 11112, that is, at least a portion of the first inner ring wall 11112 is disposed within the annular space of the third inner ring wall 11128. The third outer ring wall 11127 is arranged around the third inner ring wall 11128, that is, the third inner ring wall 11128 is disposed within the annular space of the third outer ring wall 11127. In general, the first inner ring wall 11112, the third inner ring wall 11128, the third outer ring wall 11127, and the first outer ring wall 11111 are nested sequentially along the radial direction of the motor 11.

[0216] The third sealing element 11161 is a component used to seal the gap between the first outer ring wall 11111 and the third outer ring wall 11127. The material of the third sealing element 11161 can be, but is not limited to, rubber, silicone, sealant, etc., and is not specifically limited here. In this embodiment, the third sealing element 11161 has a ring-shaped structure, and is sleeved on the outer periphery of the third outer ring wall 11127 and pressed against the space between the first outer ring wall 11111 and the third outer ring wall 11127.

[0217] The fourth seal 11162 is a component used to seal the gap between the first inner ring wall 11112 and the third inner ring wall 11128. The material of the fourth seal 11162 can be, but is not limited to, rubber, silicone, sealant, etc., and is not specifically limited here. In this embodiment, the fourth seal 11162 has a ring-shaped structure, and is sleeved on the outer periphery of the third inner ring wall 11128 and pressed against the space between the first inner ring wall 11112 and the third inner ring wall 11128.

[0218] By adopting the above technical solution, the first cavity 11131 and the second cavity 11132 are effectively formed.

[0219] Please refer to some embodiments of this application as well. Figure 5 and Figure 6 The first cavity 11131 and the second cavity 11132 are connected.

[0220] The connection between the first cavity 11131 and the second cavity 11132 means that the cooling medium can enter the first cooling channel 11311 through a necessary connecting structure. This connecting structure can be located inside the housing 111; for example, a channel can be provided inside the inner housing 1112 to connect the first cooling channel 11311 and the first cavity 1113. Alternatively, the connecting structure can be located outside the inner housing 1112; for example, a pipe can be provided outside the inner housing 1112 to connect the first cooling channel 11311 and the first cavity 1113.

[0221] By adopting the above technical solution, the cooling medium can flow between the first cavity 11131 and the second cavity 11132, effectively reducing the difference between the amount of cooling medium injected into the first cavity 11131 and the amount of cooling medium injected into the second cavity 11132, thereby making the overall heat distribution of the motor 11 more balanced and effectively improving the working performance of the motor 11.

[0222] Please refer to some embodiments of this application as well. Figure 5 and Figure 6 The housing 111 also has a communication channel 1117 that is separated from the second cavity 1114. The first cavity 11131 is connected to the second cavity 11132 through the communication channel 1117.

[0223] The connecting channel 1117 provides a flow path for the cooling medium between the first cavity 11131 and the second cavity 11132. The number of connecting channels 1117 can be one or more, depending on the specific application requirements. When there is only one connecting channel 1117, the cooling medium can enter the second cavity 11132 from the first cavity 11131 along the connecting channel 1117, or vice versa. When there are multiple connecting channels 1117, the cooling medium can enter the second cavity 11132 from the first cavity 11131 along one connecting channel 1117, or vice versa. The specific flow direction of the cooling medium within the connecting channel 1117 is not specified here.

[0224] By adopting the above technical solution, the first cavity 11131 and the second cavity 11132 are effectively connected.

[0225] Please refer to some embodiments of this application as well. Figure 7 and Figure 8 The second cavity 1114 includes a third cavity 11142 and a fourth cavity 11143. The rotor 113 includes a first rotor 113a disposed in the third cavity 11142 and a second rotor 113b disposed in the fourth cavity 11143. The first cavity 1113 is disposed between the third cavity 11142 and the fourth cavity 11143.

[0226] The first cavity 1113 is disposed between the third cavity 11142 and the fourth cavity 11143, that is, the stator 112 is disposed between the first rotor 113a and the second rotor 113b. In other words, in this embodiment, the motor 11 is a dual-rotor single-stator motor. The third cavity 11142 is separated from the first cavity 1113, and the fourth cavity 11143 is separated from the first cavity 1113.

[0227] By adopting the above technical solution, the stator 112 can be in direct contact with the cooling medium, so that the cooling medium can effectively absorb the heat generated by the stator 112, thereby effectively improving the cooling efficiency of the dual rotor 113 motor 11.

[0228] In some embodiments of this application, please refer to Figure 8The housing 111 includes an outer shell 1111, an inner shell 1112, a first sealing assembly 1115, and a second sealing assembly 1116. The inner shell 1112 includes a first part 11122, a second part 11123, and a third part 11124 disposed between the first part 11122 and the second part 11123. The third part 11124, the first sealing assembly 1115, the second sealing assembly 1116, and the outer shell 1111 enclose and form a first cavity 1113.

[0229] The first sealing assembly 1115 is used to seal the gap between one side of the third part 11124 and the inner wall of the housing 1111, and the second sealing assembly 1116 is used to seal the gap between the other side of the third part 11124 and the inner wall of the housing 1111, so as to prevent the cooling medium in the first cavity 11131 from directly entering the second cavity 1114.

[0230] By adopting the above technical solution, the first cavity 1113 is effectively formed.

[0231] In some embodiments of this application, please refer to Figure 8 The first part 11122 has a third cavity 11142 inside, or the first part 11122, the first sealing assembly 1115 and the outer shell 1111 enclose and form the third cavity 11142.

[0232] In other words, the third cavity 11142 can be directly formed within the first part 11122. For example, the first part 11122 is integrally formed with the third cavity 11142 by injection molding. The third cavity 11142 can also be formed by the first part 11122, the first sealing component 1115 and the outer shell 1111 enclosing each other.

[0233] By adopting the above technical solution, the third cavity 11142 is effectively formed and the third cavity 11142 and the first cavity 1113 are separated from each other.

[0234] In some embodiments of this application, please refer to Figure 8 The second part 11123 has a fourth cavity 11143 inside, or the second part 11123, the second sealing assembly 1116 and the outer shell 1111 enclose and form the fourth cavity 11143.

[0235] In other words, the fourth cavity 11143 can be directly formed within the second part 11123. For example, the second part 11123 is integrally formed with the fourth cavity 11143 by injection molding. The fourth cavity 11143 can also be formed by the second part 11123, the second sealing assembly 1116, and the outer shell 1111 enclosing each other.

[0236] By adopting the above technical solution, the fourth cavity 11143 is effectively formed and the fourth cavity 11143 and the first cavity 1113 are separated from each other.

[0237] In some embodiments of this application, please refer to Figure 8 The outer casing 1111 includes a first inner ring wall 11112 and a first outer ring wall 11111 surrounding the first inner ring wall 11112. The first sealing assembly 1115 includes a first sealing element 11151, which is disposed between the first outer ring wall 11111 and the third portion 11124 on one side along the axial direction of the motor 11. The second sealing assembly 1116 includes a third sealing element 11161, which is disposed between the first outer ring wall 11111 and the third portion 11124 on the other side along the axial direction of the motor 11.

[0238] By adopting the above technical solution, the first cavity 1113 is effectively formed.

[0239] Please refer to some embodiments of this application as well. Figure 5 and Figure 7 The housing 111 includes an outer shell 1111 and an inner shell 1112 disposed within the outer shell 1111. The inner shell 1112 has a first cavity 1113 and a second cavity 1114 inside.

[0240] The outer shell 1111 provides an internal mounting environment and isolates it from the external environment. The inner shell 1112 provides a mounting environment for the stator 112 and rotor 113. In some embodiments, the outer shell 1111 is made of a metal such as copper, iron, aluminum, stainless steel, or aluminum alloy, and the inner shell 1112 is made of an insulating material, such as plastic, to insulate the stator 112 and rotor 113 from the outer shell 1111. Of course, in other embodiments, the outer shell 1111 and the inner shell 1112 can be made of the same material; for example, both the outer shell 1111 and the inner shell 1112 can be made of plastic.

[0241] In other words, the first cavity 1113 and the second cavity 1114 are directly formed within the inner shell 1112. The first cavity 1113 is not connected to the space between the outer shell 1111 and the inner shell 1112, while the second cavity 1114 may or may not be connected to the space between the outer shell 1111 and the inner shell 1112. In this embodiment, both the inlet pipe 124 and the outlet pipe are directly connected to the inner shell 1112 and communicate with the first cavity 1113, allowing the cooling medium to directly enter the first cavity 1113 via the inlet pipe 124 and exit the first cavity 1113 via the outlet pipe.

[0242] By adopting the above technical solution, the first cavity 1113 and the second cavity 1114 are effectively formed and the first cavity 1113 and the second cavity 1114 are separated from each other.

[0243] Please refer to some embodiments of this application as well. Figure 5 and Figure 7 The inner shell 1112 includes a shell body and a partition 11121. The partition 11121 is disposed inside the shell body to divide the internal space of the shell body into a first cavity 1113 and a second cavity 1114.

[0244] The shell body is the main part of the inner shell 1112, which is used to provide the internal installation environment of the inner shell 1112.

[0245] The partition 11121 is a component used to separate the first cavity 1113 and the second cavity 1114. The partition 11121 is connected to the shell body. Specifically, the outer periphery of the partition 11121 is sealed to the inner peripheral wall of the shell body. The first cavity 1113 is formed on one side of the partition 11121, and the second cavity 1114 is formed on the other side of the partition 11121.

[0246] In some embodiments, the shell body and the partition 11121 can be an integrally molded structure, for example, the shell body and the partition 11121 can be integrally molded by injection molding. Of course, in other embodiments, the shell body and the partition 11121 can also be molded separately and then connected to each other.

[0247] Please see Figure 5 When the first cavity 1113 includes a first cavity 11131 and a second cavity 11132, the shell body is provided with two partitions 11121, and a second cavity 1114 is formed between the two partitions 11121. The first cavity 11131 is formed on the side of one partition 11121 facing away from the second cavity 1114, and the second cavity 11132 is formed on the side of the other partition 11121 facing away from the second cavity 1114.

[0248] Please see Figure 7 When the second cavity 1114 includes a third cavity 11142 and a fourth cavity 11143, the shell body is provided with two partitions 11121, a first cavity 1113 is formed between the two partitions 11121, a third cavity 11142 is formed on the side of one partition 11121 facing away from the first cavity 1113, and a fourth cavity 11143 is formed on the side of the other partition 11121 facing away from the first cavity 1113.

[0249] By adopting the above technical solution, the first cavity 1113 and the second cavity 1114 are effectively separated from each other.

[0250] In some embodiments of this application, please refer to Figure 9 The housing 111 has a cooling medium inlet 1118 and a cooling medium outlet 1119 that are connected to the first cavity 1113. The cooling medium inlet 1118 includes a first inlet 1118a, which is located on the inner circumferential side of the stator 112, and the cooling medium outlet 1119 is located on the outer circumferential side of the stator 112.

[0251] The cooling medium inlet 1118 provides a channel for the cooling medium to enter the first cavity 1113, wherein the first inlet 1118a provides a channel for the cooling medium to enter the inner space of the stator 112. The first inlet 1118a being located on the inner circumference of the stator 112 means that at least a portion of the first inlet 1118a is disposed opposite to the inner space of the stator 112, so that the cooling medium can directly enter the inner space of the stator 112 through the first inlet 1118a.

[0252] The cooling medium outlet 1119 provides a channel for the cooling medium to exit the housing 111. The cooling medium outlet 1119 being located on the outer periphery of the stator 112 means that at least a portion of the cooling medium outlet 1119 is positioned opposite the outer space of the stator 112, allowing the cooling medium to exit from the outer periphery of the stator 112 through the cooling medium outlet 1119 to the outside of the housing 111. There may be one or more cooling medium outlets 1119.

[0253] By adopting the above technical solution, the cooling medium can enter the inner space of the stator 112 through the first inlet 1118a. Then, the cooling medium can flow from the inner circumference of the stator 112 through various gaps in the stator 112 to the outer circumference of the stator 112. Then, the cooling medium is discharged to the outside of the housing 111 through the cooling medium outlet 1119. This allows the cooling medium to come into more full contact with the stator 112, thereby more effectively absorbing the heat generated by the stator 112 and further improving the cooling efficiency of the motor 11.

[0254] In some embodiments of this application, please refer to Figure 9 The cooling medium inlet 1118 also includes a second inlet 1118b that communicates with the first cavity 1113. The second inlet 1118b is located on the outer periphery of the stator 112.

[0255] The second inlet 1118b is used to provide a channel for the cooling medium to enter the outer space of the stator 112. The second inlet 1118b being located on the outer periphery of the stator 112 means that at least a portion of the second inlet 1118b is disposed opposite to the outer space of the stator 112, so that the cooling medium can directly enter the outer space of the stator 112 through the second inlet 1118b.

[0256] like Figure 10As shown, during operation, a portion of the cooling medium enters the inner space of the stator 112 from the first inlet 1118a. Subsequently, this portion of the cooling medium flows from the inner circumference of the stator 112 through various gaps in the stator 112 to the outer circumference of the stator 112. Another portion of the cooling medium enters the outer space of the stator 112 from the second inlet 1118b. Both portions of the cooling medium flow to the cooling medium outlet 1119 and are discharged to the outside of the housing 111 through the cooling medium outlet 1119, so that the cooling medium absorbs the heat generated by the stator 112 and cools the stator 112.

[0257] By adopting the above technical solution, the cooling medium can not only enter the inner space of the stator 112 through the first inlet 1118a, but also enter the outer space of the stator 112 through the second inlet 1118b, so that the cooling medium can come into more full contact with the stator 112, thereby more effectively absorbing the heat generated by the stator 112 and further improving the cooling efficiency of the motor 11.

[0258] In some embodiments of this application, please refer to Figure 9 The second inlet 1118b and the cooling medium outlet 1119 are respectively located on opposite sides of the stator 112 along the radial direction.

[0259] In some embodiments, the second inlet 1118b, the first inlet 1118a, and the cooling medium outlet 1119 may be arranged sequentially along the same radial direction of the stator 112, wherein the first inlet 1118a is located on the inner circumferential side of the stator 112, and the second inlet 1118b and the cooling medium outlet 1119 are located on the outer circumferential side of the stator 112.

[0260] By adopting the above technical solution, after the cooling medium enters the outer space of the stator 112 from the second inlet 1118b, the cooling medium can flow along the outer periphery of the stator 112 from one side of the stator 112 along the radial direction to the other side of the stator 112 along the same radial direction, and finally be discharged from the cooling medium outlet 1119 to the outside of the housing 111. This allows the cooling medium to come into more full contact with the stator 112, thereby more effectively absorbing the heat generated by the stator 112 and further improving the cooling efficiency of the motor 11.

[0261] In some embodiments of this application, please refer to Figure 9The motor 11 also includes a rotor 113. The housing 111 also has a second cavity 1114 that is separated from the first cavity 1113. The rotor 113 is disposed in the second cavity 1114. The first cavity 1113 includes a first cavity 11131 and a second cavity 11132. The stator 112 includes a first stator 112a disposed in the first cavity 11131 and a second stator 112b disposed in the second cavity 11132. The second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132.

[0262] In some embodiments, the housing 111 includes an outer shell 1111 and an inner shell 1112 disposed within the outer shell 1111. The outer shell 1111 provides an internal mounting environment for the housing 111 and isolates this internal mounting environment from the external environment of the housing 111. The inner shell 1112 provides an mounting environment for the stator 112 and the rotor 113. In some embodiments, the outer shell 1111 is made of a metal such as copper, iron, aluminum, stainless steel, or aluminum alloy, and the inner shell 1112 is made of an insulating material, such as plastic, to insulate the stator 112 and the rotor 113 from the outer shell 1111. Of course, in other embodiments, the outer shell 1111 and the inner shell 1112 may be made of the same material; for example, both the outer shell 1111 and the inner shell 1112 may be made of plastic.

[0263] The inner shell 1112 has a first cavity 1113 and a second cavity 1114 inside. In other words, the first cavity 1113 and the second cavity 1114 are directly formed inside the inner shell 1112. The first cavity 1113 may or may not be connected to the space between the outer shell 1111 and the inner shell 1112. Similarly, the second cavity 1114 may or may not be connected to the space between the outer shell 1111 and the inner shell 1112.

[0264] The second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132. The first stator 112a is disposed within the first cavity 11131, and the second stator 112b is disposed within the second cavity 11132. That is, the rotor 113 is disposed between the first stator 112a and the second stator 112b. In other words, in this embodiment, the motor 11 is a dual-stator single-rotor motor. It can be understood that the first cavity 11131 and the second cavity 1114 are separated from each other, and the second cavity 11132 and the second cavity 1114 are separated from each other.

[0265] In some embodiments, there are two cooling medium outlets 1119. One cooling medium outlet 1119 is connected to the first cavity 11131, and the other cooling medium outlet 1119 is connected to the second cavity 11132. The two cooling medium outlets 1119 can be connected by an external pipeline so that the cooling medium flowing through the two cooling medium outlets 1119 merges and is discharged to the outside of the motor 11 along the external pipeline.

[0266] In some embodiments, the housing 1111 has a first pipe interface disposed opposite to the cooling medium inlet 1118 and a second pipe interface disposed opposite to the cooling medium outlet 1119. The liquid inlet pipe 124 passes through the first pipe interface and is directly connected to the cooling medium inlet 1118, and the liquid outlet pipe passes through the second pipe interface and is directly connected to the cooling medium outlet 1119, so that the cooling medium can directly enter the first cavity 1113 through the liquid inlet pipe 124 and leave the first cavity 1113 through the liquid outlet pipe.

[0267] By adopting the above technical solution, the cooling efficiency of the dual-stator single-rotor motor is effectively improved.

[0268] In some embodiments of this application, please refer to Figure 9 There are multiple first inlets 1118a, at least one first inlet 1118a is located on the side of the first stator 112a facing away from the rotor 113 and is connected to the first cavity 11131, and at least another first inlet 1118a is located on the side of the second stator 112b facing away from the rotor 113 and is connected to the second cavity 11132.

[0269] The number of first inlets 1118a can be determined according to actual application needs. In some embodiments, there are two first inlets 1118a. One first inlet 1118a is located on the side of the first stator 112a facing away from the rotor 113 and is connected to the first cavity 11131. The other first inlet 1118a is located on the side of the second stator 112b facing away from the rotor 113 and is connected to the second cavity 11132.

[0270] By adopting the above technical solution, a portion of the cooling medium can enter the inner space of the first stator 112a through the corresponding first inlet 1118a. Subsequently, this portion of the cooling medium can flow from the inner circumference of the first stator 112a through various gaps in the first stator 112a to the outer circumference of the first stator 112a. Similarly, another portion of the cooling medium can enter the inner space of the second stator 112b through the corresponding first inlet 1118a. Subsequently, this portion of the cooling medium can flow from the inner circumference of the second stator 112b through various gaps in the second stator 112b to the outer circumference of the second stator 112b. Then, the cooling medium is discharged to the outside of the housing 111 through the cooling medium outlet 1119. This not only allows the cooling medium to have more sufficient contact with the first stator 112a, but also allows the cooling medium to have more sufficient contact with the second stator 112b, thereby more effectively absorbing the heat generated by the first stator 112a and the second stator 112b, and further improving the cooling efficiency of the motor 11.

[0271] In some embodiments of this application, please refer to Figure 9 There are multiple second inlets 1118b, at least one second inlet 1118b is connected to the first cavity 11131, and at least another second inlet 1118b is connected to the second cavity 11132.

[0272] The number of second inlets 1118b can be determined according to actual application needs. In some embodiments, there are two second inlets 1118b, one of which is connected to the first cavity 11131 and the other is connected to the second cavity 11132.

[0273] By adopting the above technical solution, a portion of the cooling medium can enter the outer space of the first stator 112a through the corresponding second inlet 1118b, and another portion of the cooling medium can enter the outer space of the second stator 112b through the corresponding second inlet 1118b. Then, the cooling medium is discharged to the outside of the housing 111 through the cooling medium outlet 1119. This allows the cooling medium to come into more full contact with the first stator 112a and the second stator 112b, thereby more effectively absorbing the heat generated by the first stator 112a and the second stator 112b, and further improving the cooling efficiency of the motor 11.

[0274] In some embodiments of this application, please refer to Figure 9 The first inlet 1118a is located on the side of the stator 112 facing away from the rotor 113.

[0275] By adopting the above technical solution, it is convenient to open the first inlet 1118a on the shell 111.

[0276] In some embodiments of this application, the opening direction of the first inlet 1118a is parallel to the axial direction of the rotor 113.

[0277] In other words, during the process of the cooling medium entering the inner space of the stator 112 through the first inlet 1118a, the flow direction of the cooling medium is approximately parallel to the axial direction of the rotor 113, so that the cooling medium can flow along the axis of the rotor 113.

[0278] By adopting the above technical solution, the flow velocity of the cooling medium inside the stator 112 is effectively increased, thereby effectively increasing the convective heat transfer coefficient between the cooling medium and the stator 112, so that the cooling medium can more effectively absorb the heat generated by the stator 112, and further improve the cooling efficiency of the motor 11.

[0279] In some embodiments of this application, please refer to Figure 10 The stator 112 includes an iron core 1121 and a winding 1122. The iron core 1121 has a winding groove 11211, which passes through the inner and outer circumference of the iron core 1121. The winding 1122 is wound in the winding groove 11211. The cooling medium flows from the first inlet 1118a through the winding groove 11211 to the cooling medium outlet 1119.

[0280] The iron core 1121 is the main component of the stator 112. The iron core 1121 and the winding 1122 together constitute the magnetic circuit of the motor 11. When the winding 1122 is energized, it generates an electromagnetic field that magnetically couples with the rotor 113 to drive the rotor 113 to rotate. In some embodiments, the iron core 1121 can be an assembled component composed of multiple parts, for example, the iron core 1121 is formed by stacking multiple laminations. In other embodiments, the iron core 1121 can also be a one-piece molded component, for example, the iron core 1121 is integrally formed by a casting process.

[0281] The winding slot 11211 provides space for placing the winding 1122. Multiple winding slots 11211 can be arranged at intervals along the circumference of the stator 112, and the winding 1122 is sequentially wound within each winding slot 11211. The winding slot 11211 penetrating both the inner and outer circumference of the core 1121 means that the winding slot 11211 connects the inner space and the outer space of the stator 112.

[0282] By adopting the above technical solution, the cooling medium can flow from the inside of the stator 112 to the outside of the stator 112, so that the cooling medium can come into more full contact with the stator 112, thereby more effectively absorbing the heat generated by the stator 112 and further improving the cooling efficiency of the motor 11.

[0283] Please refer to some embodiments of this application as well. Figures 5 to 9 The housing 111 is provided with a cooling medium inlet 1118 and a cooling medium outlet 1119 that are connected to the first cavity 1113. The height h1 of the cooling medium inlet 1118 is less than the height h2 of the cooling medium outlet 1119.

[0284] The height h1 of the cooling medium inlet 1118 refers to the distance between the cooling medium inlet 1118 and the ground plane when the motor 11 is in use. Similarly, the height h2 of the cooling medium outlet 1119 refers to the distance between the cooling medium outlet 1119 and the ground plane when the motor 11 is in use.

[0285] By setting the height h1 of the cooling medium inlet 1118 to be less than the height h2 of the cooling medium outlet 1119, the cooling medium flows into the first cavity 1113 from the lower part of the housing 111 and flows out of the first cavity 1113 from the higher part of the housing 111. In this way, the gas in the first cavity 1113 is effectively discharged to the outside, which effectively improves the air entrapment phenomenon of the cooling medium and further improves the cooling efficiency of the motor 11.

[0286] Please refer to some embodiments of this application as well. Figures 5 to 9 The cooling medium inlet 1118 is located at the bottom of the housing 111, and the cooling medium outlet 1119 is located at the top of the housing 111.

[0287] The bottom and top of the housing 111 can be two parts of the motor 11 divided by the central axis of the motor 11. The bottom of the housing 111 refers to the part of the housing 111 that is closest to the ground plane, and the top of the housing 111 refers to the part of the housing 111 that is farthest from the ground plane.

[0288] By adopting the above technical solution, the air entrapment phenomenon of the cooling medium is further improved, thereby further improving the cooling efficiency of motor 11.

[0289] In some embodiments, when the first cavity 1113 includes a first cavity 11131 and a second cavity 11132, and the second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132, the cooling medium inlet 1118 and the cooling medium outlet 1119 are directly connected to the first cavity 11131, and the first cavity 11131 is connected to the second cavity 11132 through at least two connecting channels 1117, wherein the cooling medium in one connecting channel 1117 flows from the first cavity 11131 to the second cavity 11132, and the cooling medium in the other connecting channel 1117 flows from the second cavity 11132 to the first cavity 11131.

[0290] In other embodiments, when the first cavity 1113 includes a first cavity 11131 and a second cavity 11132 and the second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132, the cooling medium inlet 1118 is directly connected to the first cavity 11131, the cooling medium outlet 1119 is directly connected to the second cavity 11132, and the first cavity 11131 is connected to the second cavity 11132 through at least one connecting channel 1117, and the cooling medium in the connecting channel 1117 flows from the first cavity 11131 to the second cavity 11132.

[0291] In some other embodiments, when the first cavity 1113 includes a first cavity 11131 and a second cavity 11132 and the second cavity 1114 is disposed between the first cavity 11131 and the second cavity 11132, the cooling medium outlet 1119 is directly connected to the first cavity 11131, the cooling medium inlet 1118 is directly connected to the second cavity 11132, and the first cavity 11131 is connected to the second cavity 11132 through at least one connecting channel 1117, and the cooling medium in the connecting channel 1117 flows from the second cavity 11132 to the first cavity 11131.

[0292] Please refer to the following: Figure 3 , Figure 4 and Figure 11 This application also provides an electric drive device 10, including a liquid supply mechanism 12 and a motor 11 as described in any of the above embodiments. The liquid supply mechanism 12 is connected to a first cavity 1113 to deliver a cooling medium into the first cavity 1113.

[0293] The liquid supply mechanism 12 is a mechanism for supplying cooling medium to the first cavity 1113.

[0294] Specifically, please refer to Figure 11 The liquid supply mechanism 12 may include a liquid inlet pipe 124 and a power pump 121. One end of the liquid inlet pipe 124 is connected to the outlet of the power pump 121, and the other end of the liquid inlet pipe 124 is connected to the housing 111, so that the liquid inlet pipe 124 is in communication with the first cavity 1113. The liquid inlet pipe 124 is used to provide a flow path for the cooling medium, and the power pump 121 is used to increase the flow power of the cooling medium.

[0295] In some embodiments, the liquid supply mechanism 12 may further include a heat exchanger 122, which is disposed on the liquid inlet pipe 124 and used to absorb heat from the cooling medium. Understandably, after the high-temperature cooling medium enters the heat exchanger 122, the heat exchanger 122 absorbs the heat from the high-temperature cooling medium to convert it into a low-temperature cooling medium. The low-temperature cooling medium then enters the first cavity 1113 to cool the stator 112.

[0296] In some embodiments, the liquid supply mechanism 12 may further include a filter 123, which is disposed on the liquid inlet pipe 124 and used to filter impurities in the cooling medium. The filter 123 may be disposed on the inlet side of the power pump 121 or on the outlet side of the power pump 121, for example, the filter 123 may be disposed between the power pump 121 and the heat exchanger 122.

[0297] The electric drive device 10 provided in this application embodiment adopts the motor 11 described in any of the above embodiments, which effectively improves the cooling efficiency of the electric drive device 10 and helps to improve the working performance of the electric drive device 10.

[0298] In some embodiments of this application, please refer to Figure 11 The liquid supply mechanism 12 also includes a one-way valve 125, which is disposed on the liquid inlet pipe 124 to allow the cooling medium to flow from the liquid inlet pipe 124 to the first cavity 1113.

[0299] A one-way valve 125, also known as a check valve or non-return valve, is a directional control valve that allows fluid to flow in only one direction and not in the opposite direction. In some embodiments, the one-way valve 125 can be located between the outlet of the power pump 121 and the inlet of the first cavity 1113. For example, the one-way valve 125 can be installed in any one or more of the following locations: between the power pump 121 and the filter 123, between the filter 123 and the heat exchanger 122, and between the heat exchanger 122 and the motor 11.

[0300] By adopting the above technical solution, the backflow of the cooling medium after entering the first cavity 1113 is effectively improved, so as to ensure that the first cavity 1113 contains enough cooling medium, so that the stator 112 is fully immersed in the cooling medium, thereby further improving the cooling efficiency of the motor 11.

[0301] Please refer to some embodiments of this application as well. Figure 3 , Figure 4 and Figure 14 The housing 111 has a first installation space 11113, and the power pump 121 is installed in the first installation space 11113.

[0302] Please refer to other embodiments of this application as well. Figure 3 , Figure 4 and Figure 14 The housing 111 has a second installation space 11114, and the heat exchanger 122 is installed in the second installation space 11114.

[0303] Please refer to further embodiments of this application. Figure 3 , Figure 4 and Figure 14The housing 111 has a third installation space 11115, and the filter 123 is installed in the third installation space 11115.

[0304] Please refer to further embodiments of this application as well. Figure 3 , Figure 4 and Figure 14 The housing 111 is provided with a first installation space 11113, a second installation space 11114 and a third installation space 11115. The power pump 121 is installed in the first installation space 11113, the heat exchanger 122 is installed in the second installation space 11114 and the filter 123 is installed in the third installation space 11115.

[0305] The aforementioned installation space can be a mounting surface formed on the housing 111, a mounting cavity formed on the housing 111, or a mounting seat formed on the housing 111. To facilitate the arrangement of the liquid inlet pipe 124, the first installation space 11113, the second installation space 11114, and the third installation space 11115 are distributed sequentially along the flow direction of the cooling medium.

[0306] By adopting the above technical solution, the integration of the motor 11 is effectively improved, thereby effectively reducing the size of the electric drive device 10.

[0307] Please see Figure 11 This application also provides an electric drive device 10, including a flow guiding mechanism 13 and a motor 11 as described in any of the above embodiments. The first cavity 1113 is connected to the first cooling channel 11311 through the flow guiding mechanism 13.

[0308] The flow guiding mechanism 13 is a mechanism for connecting the first cavity 1113 and the first cooling channel 11311. The flow guiding mechanism 13 can be part of the connection structure between the first cavity 1113 and the first cooling channel 11311, or it can be the entire connection structure between the first cavity 1113 and the first cooling channel 11311. In other words, the flow guiding mechanism 13 can be directly connected between the first cavity 1113 and the first cooling channel 11311, or the flow guiding mechanism 13 can be indirectly connected to the first cavity 1113 and / or the first cooling channel 11311 through other connection structures.

[0309] The electric drive device 10 provided in this application embodiment adopts the motor 11 described in any of the above embodiments, which effectively improves the cooling efficiency of the electric drive device 10 and helps to improve the working performance of the electric drive device 10.

[0310] In some embodiments of this application, please refer to Figure 12The flow guiding mechanism 13 includes a flow guiding component 131, and the flow guiding component 131 has a flow guiding channel 1311 inside. The first cavity 1113 is connected to the first cooling channel 11311 through the flow guiding channel 1311.

[0311] The flow guide 131 is a component used to connect the first cavity 1113 and the first cooling channel 11311, while the flow guide channel 1311 is used to provide a flow path for the cooling medium between the first cavity 1113 and the first cooling channel 11311. In some embodiments, the cooling medium in the first cavity 1113 can enter the first cooling channel 11311 via the flow guide channel 1311. Of course, in other embodiments, the cooling medium in the first cooling channel 11311 can enter the first cavity 1113 via the flow guide channel 1311.

[0312] By adopting the above technical solution, the cooling medium can be effectively flowed between the first cavity 1113 and the first cooling channel 11311, thereby achieving cooling of the stator 112 and the rotor 113.

[0313] In some embodiments of this application, please refer to Figure 12 The flow guide 131 includes a flow guide body 1312 and a plug part 1313 connected to the flow guide body 1312. The flow guide channel 1311 passes through the flow guide body 1312 and the plug part 1313. The plug part 1313 is inserted into the first cooling channel 11311.

[0314] The drainage body 1312 is the main part of the drainage component 131. The drainage body 1312 can be connected to other components to fix the drainage component 131. Optionally, the shape of the drainage body 1312 can be, but is not limited to, a disc shape, a square disc shape, a cylindrical shape, a prism shape, etc., and no specific limitation is made here.

[0315] The connector 1313 is a component that connects to the first cooling channel 11311. Optionally, the shape of the connector 1313 can be, but is not limited to, a tubular structure, a platform structure, etc., and is not specifically limited here.

[0316] In some embodiments, the drainage body 1312 and the plug portion 1313 do not contact the rotor shaft 1131 or other rotating structures connected to the rotor shaft 1131, so that the drainage member 131 does not rotate with the rotor shaft 1131.

[0317] In some embodiments, the drainage body 1312 and the insertion part 1313 can be an integrally formed structure. For example, the drainage body 1312 and the insertion part 1313 can be integrally formed by injection molding. Of course, in other embodiments, the drainage body 1312 and the insertion part 1313 can also be formed separately and then connected to each other.

[0318] By adopting the above technical solution, the cooling medium is effectively injected into the first cooling channel 11311, thereby effectively improving the reliability of cooling the rotor 113 of the motor 11.

[0319] Please refer to some embodiments of this application as well. Figure 11 and Figure 13 The electric drive device 10 also includes a speed change mechanism 14, and the diversion mechanism 13 also includes a diverter 132. The diverter 132 is provided with a first diverter channel 1321 and a second diverter channel 1322. One end of the first diverter channel 1321 and one end of the second diverter channel 1322 are connected to the first cavity 1113. The other end of the first diverter channel 1321 is connected to the diversion channel 1311, and the other end of the second diverter channel 1322 is connected to the speed change mechanism 14.

[0320] The flow divider 132 is a component used to connect the flow channel 1311 and the transmission mechanism 14 to the first cavity 1113. The first flow divider 1321 is used to provide a flow path for the cooling medium between the first cavity 1113 and the flow channel 1311, and the second flow divider 1322 is used to provide a flow path for the cooling medium between the first cavity 1113 and the transmission mechanism 14.

[0321] In some embodiments, please refer to Figure 13 The diverter 132 is also provided with a collection channel 1323, which is connected to the first cavity 1113. One end of the first diverter channel 1321 and one end of the second diverter channel 1322 are connected to the collection channel 1323. The other end of the first diverter channel 1321 is connected to the guide channel 1311, and the other end of the second diverter channel 1322 is connected to the speed change mechanism 14.

[0322] The transmission mechanism 14 is used to transmit the aforementioned mechanical energy to the wheels of the vehicle 1000 by changing the speed and torque of the motor 11. For example, the transmission mechanism 14 transmits the aforementioned mechanical energy to the wheels of the vehicle 1000 by decreasing the speed of the motor 11 and increasing the torque of the motor 11; or, for example, the transmission mechanism 14 transmits the aforementioned mechanical energy to the wheels of the vehicle 1000 by increasing the speed of the motor 11 and decreasing the torque of the motor 11. Optionally, the transmission mechanism 14 can be, but is not limited to, a gear transmission mechanism 14, a worm gear transmission mechanism 14, a planetary gear transmission mechanism 14, a continuously variable transmission mechanism 14, etc., and is not specifically limited here.

[0323] By adopting the above technical solution, the cooling medium discharged from the first cavity 1113 can not only flow into the first cooling channel 11311 to cool the rotor 113, but also flow into the transmission mechanism 14 to cool and lubricate multiple components in the transmission mechanism 14, so that the cooling medium is fully utilized and the working performance of the electric drive device 10 is improved.

[0324] The working principle of one embodiment of the above-mentioned diversion mechanism 13 will be explained below.

[0325] Please see Figure 11 The cooling medium in the first cavity 1113 flows into the collection channel 1323 of the diverter 132. A portion of the cooling medium in the collection channel 1323 flows into the first diverter channel 1321 and then into the guide channel 1311 of the guide member 131. Subsequently, it flows into the first cooling channel 11311 of the guide member 131 to cool the rotor 113. Another portion of the cooling medium in the collection channel 1323 flows into the second diverter channel 1322 and then into the corresponding part of the transmission mechanism 14 to cool and lubricate the corresponding components of the transmission mechanism 14.

[0326] In some embodiments of this application, please refer to Figure 14 The housing 111 is provided with a first bearing seat 11116, and the first cooling channel 11311 is connected to the first bearing seat 11116.

[0327] The first bearing housing 11116 is used to provide mounting space for the shaft. For example, the shaft in the transmission mechanism 14 of the electric drive device 10 is mounted on the first bearing housing 11116. It is understood that when the housing 111 includes an outer shell 1111 and an inner shell 1112, the first bearing housing 11116 is disposed on the outer shell 1111.

[0328] The connection between the first cooling channel 11311 and the first bearing housing 11116 means that the cooling medium in the first cooling channel 11311 can enter the internal space of the first bearing housing 11116 through the necessary connecting structure.

[0329] By adopting the above technical solution, the cooling medium discharged from the first cooling channel 11311 can flow into the first bearing housing 11116 to cool and lubricate the components installed in the first bearing housing 11116, so that the cooling medium is fully utilized and the working performance of the electric drive device 10 is improved.

[0330] In some embodiments of this application, please refer to Figure 14The housing 111 is provided with a flow channel 11117. One end of the flow channel 11117 is connected to the first cooling channel 11311, and the other end of the flow channel 11117 is connected to the first bearing seat 11116.

[0331] The flow channel 11117 is a connecting structure for connecting the first cooling channel 11311 and the first bearing housing 11116. In some embodiments, the flow channel 11117 can be a flow guide rib disposed on the housing 111, with one end of the flow guide rib connected to the first cooling channel 11311 and the other end connected to the first bearing housing 11116. In other embodiments, the flow channel 11117 can be a flow guide pipe disposed on the housing 111, with one end of the flow guide pipe connected to the first cooling channel 11311 and the other end connected to the first bearing housing 11116.

[0332] By adopting the above technical solution, the first cooling channel 11311 and the first bearing housing 11116 are effectively connected, and the structure of the motor 11 becomes more compact, thereby effectively reducing the volume of the electric drive device 10.

[0333] In some embodiments of this application, the electric drive device 10 further includes a speed change mechanism 14, which includes a rotating shaft rotatably mounted on a first bearing housing 11116.

[0334] The shaft can be any shaft in the transmission mechanism 14, such as the power input shaft, the power output shaft, etc., without specific limitations.

[0335] By adopting the above technical solution, the shaft of the transmission mechanism 14 can be effectively cooled and lubricated.

[0336] In some embodiments of this application, the shaft is a power output shaft.

[0337] The power take-off shaft is a shaft used to connect to vehicle 1000.

[0338] In some embodiments, the housing 111 is further provided with a second bearing seat 11118, the rotor shaft 1131 is rotatably mounted on the second bearing seat 11118, the power input shaft of the transmission mechanism 14 is rotatably mounted on the second bearing seat 11118 and coaxially connected to the rotor shaft 1131, the power input shaft is provided with a third cooling channel, the first cooling channel 11311 is connected to the first cooling channel, the second bearing seat 11118 is provided with an opening connected to the third cooling channel, one end of the guide channel 11117 away from the first bearing seat 11116 is connected to the opening, and the cooling medium in the first cooling channel 11311 flows into the first bearing seat 11116 in sequence through the third cooling channel, the opening, and the guide channel 11117.

[0339] By adopting the above technical solution, the power output shaft of the transmission mechanism 14 can be effectively cooled and lubricated.

[0340] The cooling principle of the electric drive device 10 provided in this embodiment will be explained below.

[0341] Please see Figure 11 The cooling medium is placed in the cooling medium container 300. The power pump 121 draws the cooling medium from the cooling medium container 300 so that the cooling medium flows through the filter 123, the heat exchanger 122 and the one-way valve 125 in sequence and then enters the first cavity 1113 through the cooling medium inlet 1118. The cooling medium absorbs the heat generated by the stator 112 in the first cavity 1113. The cooling medium leaves the first cavity 1113 through the cooling medium outlet 1119 and enters the collection channel 1323 of the diverter 132. A part of the cooling medium in the collection channel 1323 flows into the first diverter channel 1321 and flows along the first diverter channel 1321 into the diverter channel 1311 of the diverter 131. Then it flows along the diverter channel 1311 into the first cooling channel 11311 of the diverter 131 to cool the rotor 113. Meanwhile, another portion of the cooling medium in the collecting channel 1323 flows into the second diverting channel 1322 and then flows along the second diverting channel 1322 into the corresponding part of the transmission mechanism 14 to cool and lubricate the corresponding components of the transmission mechanism 14. Specifically, during the cooling process of the rotor 113, a portion of the cooling medium in the first cooling channel 11311 flows sequentially through the first through hole 11312, the second cooling channel 11321, the second cavity 1114, and the second through hole 11141, and finally flows back into the cooling medium container 300. Another portion of the cooling medium in the first cooling channel 11311 flows sequentially through the opening of the second bearing seat 11118 and the guide channel 11117 into the first bearing seat 11116 to cool and lubricate the power output shaft of the transmission mechanism 14, and finally flows back into the cooling medium container 300.

[0342] This application also provides an electric drive system 100, including a battery 20 and an electric drive device 10 as described in any of the above embodiments, wherein the battery 20 is electrically connected to the electric drive device 10.

[0343] The electric drive system 100 provided in this application embodiment effectively improves the cooling efficiency of the electric drive system 100 by adopting the electric drive device 10 described in any of the above embodiments, which is beneficial to improving the working performance of the electric drive system 100.

[0344] This application also provides an electric device, including the electric drive system 100 described above.

[0345] The electric equipment provided in this application embodiment adopts the electric drive system 100 described in any of the above embodiments, which effectively improves the cooling efficiency of the electric equipment and helps to improve the working performance of the electric equipment.

[0346] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric motor, characterized in that: The motor includes: The housing has a first cavity inside, which is used to contain the cooling medium; A stator is disposed within the first cavity, and at least a portion of the stator is immersed in the cooling medium; The motor also includes a rotor, and the housing is further provided with a second cavity that is separated from the first cavity. The rotor is disposed in the second cavity. The rotor includes a rotor shaft and a rotor disk connected to the rotor shaft. The rotor shaft is provided with a first cooling channel, and the rotor disk is provided with a second cooling channel. The cavity wall of the second cavity is provided with a second through hole. The first cavity, the first cooling channel, the second cooling channel and the second cavity are sequentially connected so that the cooling medium can flow from the first cavity through the first cooling channel and the second cooling channel in sequence, enter the second cavity and flow out of the second cavity through the second through hole.

2. The motor as described in claim 1, characterized in that: The end of the second cooling channel away from the first cooling channel passes through the end face of the rotor disk to communicate with the second cavity.

3. The motor as described in claim 2, characterized in that: The end of the second cooling channel away from the first cooling channel extends through the opposite two end faces of the rotor disk.

4. The motor as described in claim 1, characterized in that: The number of the second cooling channels is multiple, and the multiple second cooling channels are arranged around the rotor shaft.

5. The motor as described in claim 1, characterized in that: The rotor shaft has a first through hole in its wall, and the second cooling channel is connected to the first cooling channel through the first through hole.

6. The motor as described in claim 1, characterized in that: The second through hole is formed on the peripheral wall of the second cavity.

7. The motor as described in claim 1, characterized in that: The number of the second through holes is multiple, and the multiple second through holes are arranged around the rotor shaft.

8. The motor as described in any one of claims 1-7, characterized in that: The first cavity includes a first cavity and a second cavity, the stator includes a first stator disposed in the first cavity and a second stator disposed in the second cavity, and the second cavity is disposed between the first cavity and the second cavity.

9. The motor as described in claim 8, characterized in that: The housing includes an outer shell, an inner shell, a first sealing assembly, and a second sealing assembly. The inner shell includes a first part, a second part, and a third part disposed between the first part and the second part. The first part, the first sealing assembly, and the outer shell enclose to form the first cavity, and the second part, the second sealing assembly, and the outer shell enclose to form the second cavity.

10. The motor as described in claim 9, characterized in that: The third part has the second cavity inside, or the third part, the first sealing assembly, the second sealing assembly and the outer shell surround to form the second cavity.

11. The motor as described in claim 9, characterized in that: The outer casing includes a first inner ring wall and a first outer ring wall disposed around the first inner ring wall; The first part includes a second inner ring wall and a second outer ring wall disposed between the first inner ring wall and the first outer ring wall, the second outer ring wall being disposed around the second inner ring wall, and the first sealing assembly includes a first sealing element and a second sealing element, the first sealing element being disposed between the first outer ring wall and the second outer ring wall, and the second sealing element being disposed between the first inner ring wall and the second inner ring wall; And / or, The second part includes a third inner ring wall and a third outer ring wall disposed between the first inner ring wall and the first outer ring wall, the third outer ring wall being disposed around the third inner ring wall, and the second sealing assembly including a third sealing element and a fourth sealing element, the third sealing element being disposed between the first outer ring wall and the third outer ring wall, and the fourth sealing element being disposed between the first inner ring wall and the third inner ring wall.

12. The motor as described in claim 8, characterized in that: The first cavity and the second cavity are connected.

13. The motor as described in claim 12, characterized in that: The housing is further provided with a communication channel that is separated from the second cavity, and the first cavity is connected to the second cavity through the communication channel.

14. The motor according to any one of claims 1-7, characterized in that: The second cavity includes a third cavity and a fourth cavity, and the rotor includes a first rotor disposed in the third cavity and a second rotor disposed in the fourth cavity. The first cavity is disposed between the third cavity and the fourth cavity.

15. The motor as described in claim 14, characterized in that: The housing includes an outer shell, an inner shell, a first sealing assembly, and a second sealing assembly. The inner shell includes a first part, a second part, and a third part disposed between the first part and the second part. The third part, the first sealing assembly, the second sealing assembly, and the outer shell together form the first cavity.

16. The motor as described in claim 15, characterized in that: The third cavity is provided inside the first part, or the third cavity is formed by the first part, the first sealing assembly, and the outer shell.

17. The motor as described in claim 15, characterized in that: The second part has the fourth cavity inside, or the second part, the second sealing assembly, and the outer shell enclose the fourth cavity.

18. The motor as described in claim 15, characterized in that: The housing includes a first inner ring wall and a first outer ring wall disposed around the first inner ring wall; the first sealing assembly includes a first seal, which is disposed between the first outer ring wall and one side of the third portion along the axial direction of the motor; the second sealing assembly includes a third seal, which is disposed between the first outer ring wall and the third portion on the other side along the axial direction of the motor.

19. The motor according to any one of claims 1-7, characterized in that: The housing includes an outer shell and an inner shell disposed within the outer shell, wherein the inner shell has a first cavity and a second cavity inside.

20. The motor as described in claim 19, characterized in that: The inner shell includes a shell body and a partition. The partition is disposed within the shell body to divide the internal space of the shell body into the first cavity and the second cavity.

21. The motor as described in claim 1, characterized in that: The housing has a cooling medium inlet and a cooling medium outlet that communicate with the first cavity. The cooling medium inlet includes a first inlet located on the inner circumferential side of the stator, and the cooling medium outlet is located on the outer circumferential side of the stator.

22. The motor as described in claim 21, characterized in that: The cooling medium inlet also includes a second inlet connected to the first cavity, and the second inlet is located on the outer periphery of the stator.

23. The motor as described in claim 22, characterized in that: The second inlet and the cooling medium outlet are located on opposite sides of the stator along the radial direction.

24. The motor as described in claim 22, characterized in that: The motor also includes a rotor, and the housing is further provided with a second cavity that is separated from the first cavity. The rotor is disposed in the second cavity. The first cavity includes a first body and a second body. The stator includes a first stator disposed in the first cavity and a second stator disposed in the second cavity. The second cavity is disposed between the first body and the second cavity.

25. The motor as described in claim 24, characterized in that: There are multiple first inlets, at least one of which is located on the side of the first stator opposite to the rotor and is connected to the first cavity, and at least another first inlet is located on the side of the second stator opposite to the rotor and is connected to the second cavity.

26. The motor as described in claim 24, characterized in that: There are multiple second inlets, at least one of which is connected to the first cavity, and at least another second inlet is connected to the second cavity.

27. The motor as described in claim 24, characterized in that: The first inlet is located on the side of the stator opposite to the rotor.

28. The motor as described in claim 24, characterized in that: The opening direction of the first inlet is parallel to the axial direction of the rotor.

29. The motor as described in claim 21, characterized in that: The stator includes an iron core and a winding. The iron core has a winding groove that extends through the inner and outer circumferences of the iron core. The winding is wound in the winding groove. The cooling medium flows from the first inlet through the winding groove to the cooling medium outlet.

30. The motor according to any one of claims 1-7, characterized in that: The housing is provided with a cooling medium inlet and a cooling medium outlet that communicate with the first cavity, and the height of the cooling medium inlet is less than the height of the cooling medium outlet.

31. The motor as described in claim 30, characterized in that: The cooling medium inlet is located at the bottom of the housing, and the cooling medium outlet is located at the top of the housing.

32. An electric drive device, characterized in that: The electric drive device includes a liquid supply mechanism and a motor as described in any one of claims 1-31, wherein the liquid supply mechanism is connected to the first cavity to deliver the cooling medium into the first cavity.

33. The electric drive device as claimed in claim 32, characterized in that: The liquid supply mechanism includes an inlet pipe and a one-way valve. The inlet pipe is connected to the first cavity, and the one-way valve is disposed on the inlet pipe to allow the cooling medium to flow from the inlet pipe to the first cavity.

34. The electric drive device as described in claim 32 or 33, characterized in that: The liquid supply mechanism includes a power pump, and the housing has a first mounting space, within which the power pump is installed; and / or, The liquid supply mechanism includes a heat exchanger, and the housing is provided with a second mounting space, in which the heat exchanger is installed; And / or, The liquid supply mechanism includes a filter, and the housing has a third mounting space, in which the filter is installed.

35. An electric drive device, characterized in that: The electric drive device includes a flow guiding mechanism and a motor as described in any one of claims 1-7, wherein the first cavity is connected to the first cooling channel through the flow guiding mechanism.

36. The electric drive device as claimed in claim 35, characterized in that: The flow guiding mechanism includes a flow guiding component, and the flow guiding component has a flow guiding channel inside. The first cavity is connected to the first cooling channel through the flow guiding channel.

37. The electric drive device as claimed in claim 36, characterized in that: The drainage component includes a drainage body and a plug-in portion connected to the drainage body. The drainage channel passes through the drainage body and the plug-in portion, and the plug-in portion is inserted into the first cooling channel.

38. The electric drive device as claimed in claim 36, characterized in that: The electric drive device further includes a speed change mechanism, and the flow diversion mechanism further includes a flow divider. The flow divider is provided with a first flow divider channel and a second flow divider channel. One end of the first flow divider channel and one end of the second flow divider channel are connected to the first cavity. The other end of the first flow divider channel is connected to the flow diversion channel, and the other end of the second flow divider channel is connected to the speed change mechanism.

39. The electric drive device according to any one of claims 35-38, characterized in that: The housing is provided with a first bearing seat, and the first cooling channel is connected to the first bearing seat.

40. The electric drive device as claimed in claim 39, characterized in that: The housing is provided with a flow channel, one end of which is connected to the first cooling channel, and the other end of which is connected to the first bearing seat.

41. The electric drive device as claimed in claim 39, characterized in that: The electric drive device further includes a speed change mechanism, which includes a rotating shaft rotatably mounted on the first bearing housing.

42. The electric drive device as claimed in claim 41, characterized in that: The shaft is a power output shaft.

43. An electric drive system, characterized in that: The electric drive system includes a battery and an electric drive device as described in any one of claims 32-42, wherein the battery is electrically connected to the electric drive device.

44. An electric device, characterized in that: The electric device includes the electric drive system as described in claim 43.

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