Stator, motor, electric driving device, electric driving system and electric equipment

Abstract

The utility model provides a stator, a motor, an electric driving device, an electric driving system and electric equipment.The stator comprises a stator shell, a separator and a stator body, the stator shell is provided with a containing cavity, the separator is fixedly arranged in the containing cavity and divides the containing cavity into a first cavity body and a second cavity body, and the first cavity body and the second cavity body are both used for containing a cooling medium; the stator main body comprises a first stator assembly and a second stator assembly, the first stator assembly is fixedly arranged in the first cavity, the second stator assembly is fixedly arranged in the second cavity, and at least part of the first stator assembly and at least part of the second stator assembly are soaked in the cooling medium. According to the stator provided by the embodiment of the invention, redundancy design is realized, the reliability of the stator is effectively improved, the first stator assembly and the second stator assembly can be in direct contact with the cooling medium, heat generated by the first stator assembly and the second stator assembly is effectively absorbed, the cooling efficiency of the stator is improved, and the service life of the stator is prolonged. Therefore, the working performance of the motor is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of motor technology, and in particular to a stator, a motor, an electric drive device, an electric drive system and an electric device. Background Art

[0002] With increasing environmental pollution, new energy vehicles are gaining popularity. Electric drive systems, as the power units of new energy vehicles, convert the electrical energy provided by the battery into mechanical energy to propel the vehicle. Improving the performance of electric motors, the core components of electric drive systems, is a pressing technical challenge in electric drive technology. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a motor, an electric drive device, an electric drive system and an electric device to solve the technical problem of poor working performance of the motor in the related art.

[0004] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is to provide a stator, comprising:

[0005] A stator housing having a cavity;

[0006] A separator is fixedly arranged in the cavity and divides the cavity into a first cavity and a second cavity, wherein the first cavity and the second cavity are both used to accommodate a cooling medium;

[0007] The stator body includes a first stator assembly and a second stator assembly. The first stator assembly is fixed in the first cavity, and the second stator assembly is fixed in the second cavity. At least part of the first stator assembly and at least part of the second stator assembly are immersed in the cooling medium.

[0008] The stator provided by the embodiment of the present application has at least the following beneficial effects: the stator body in the stator provided by the embodiment of the present application includes a first stator component and a second stator component, the first stator component and the second stator component can work independently of each other, and when the first stator component fails to work normally, the stator can rely on the second stator component to continue working, thereby realizing a redundant design of the stator and effectively improving the reliability of the stator. Moreover, by fixing the first stator component and the second stator component in the first cavity and the second cavity respectively, and immersing at least part of the first stator component and at least part of the second stator component in the cooling medium, the first stator component and the second stator component can both be in direct contact with the cooling medium, effectively absorbing the heat generated by the first stator component and the second stator component, thereby improving the cooling efficiency of the stator and effectively improving the working performance of the motor.

[0009] In some embodiments of the present application, the stator housing is provided with a cooling inlet and a cooling outlet, both of which are connected to the cavity, so that the cooling medium can flow into the cavity through the cooling inlet or flow out of the cavity through the cooling outlet.

[0010] By adopting the above technical solution, it is convenient to input the cooling medium into the cavity or output the cooling medium to the outside of the cavity.

[0011] In some embodiments of the present application, the partition is provided with a first through hole, and the first through hole is used to connect the first cavity and the second cavity.

[0012] 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 injection amount of the cooling medium in the first cavity and the injection amount of the cooling medium in the second cavity, making the overall heat distribution of the stator more balanced, thereby further improving the working performance of the motor.

[0013] In some embodiments of the present application, the cooling inlet and the cooling outlet are respectively provided on opposite sides of the stator housing along the radial direction of the stator.

[0014] By adopting the above technical solution, the cooling medium can flow from the stator case along the radial side of the stator to the stator case along the radial side of the stator, so that the cooling medium can fully contact the stator body, further improving the cooling efficiency of the stator, thereby further improving the working performance of the motor.

[0015] In some embodiments of the present application, the cooling inlet and the cooling outlet are both directly connected to the first cavity, and the stator further includes a first blocking member disposed in the first cavity.

[0016] By adopting the above technical solution, under the blocking action of the first blocking member, the flow rate of the cooling medium in the first cavity can be effectively reduced, so that as much cooling medium as possible can enter the second cavity through the first through hole, so as to reduce the flow difference of the cooling medium in the first cavity and the second cavity, thereby reducing the temperature difference between the first stator assembly and the second stator assembly, and further improving the working performance of the motor.

[0017] In some embodiments of the present application, the stator further includes a second blocking member, which is disposed in the first cavity and located on the inner circumference of the first stator assembly, and the first blocking member is located on the outer circumference of the first stator assembly.

[0018] By adopting the above technical solution, the flow rate of the cooling medium in the first cavity is further reduced, so that more cooling medium can enter the second cavity through the first through hole, thereby further reducing the flow difference of the cooling medium in the first cavity and the second cavity, thereby further reducing the temperature difference between the first stator assembly and the second stator assembly, and further improving the working performance of the motor.

[0019] In some embodiments of the present application, there are multiple cooling inlets, at least one cooling inlet is directly connected to the first cavity, and at least another cooling inlet is directly connected to the second cavity.

[0020] By adopting the above technical solution, the cooling medium can be transported to the first cavity and the second cavity respectively, so that a part of the cooling medium flows through the first stator assembly to cool the first stator assembly, and the other part of the cooling medium flows through the second stator assembly to cool the second stator assembly, thereby effectively reducing the temperature difference between the first stator assembly and the second stator assembly, and further improving the working performance of the motor.

[0021] In some embodiments of the present application, the cooling outlet is arranged opposite to the first via hole.

[0022] By adopting the above technical solution, one of the cooling medium located in the first cavity and the cooling medium located in the second cavity can flow out directly to the outside of the cavity through the cooling outlet, while the other of the cooling medium located in the first cavity and the cooling medium located in the second cavity can flow out to the outside of the cavity through the first through hole and the cooling outlet in turn, effectively improving the discharge efficiency of the cooling medium.

[0023] In some embodiments of the present application, the cooling inlet is directly connected to the first cavity, and the cooling outlet is directly connected to the second cavity.

[0024] By adopting the above technical solution, the cooling medium can flow through the first cavity and the second cavity in sequence to cool the first stator assembly and the second stator assembly, so that the first stator assembly and the second stator assembly can be fully in contact with the cooling medium, further improving the cooling efficiency of the stator, thereby further improving the working performance of the motor.

[0025] In some embodiments of the present application, the cooling inlet and the cooling outlet are both arranged at the top of the stator case; or, the cooling inlet is arranged at the bottom of the stator case, and the cooling outlet is arranged at the top of the stator case.

[0026] By adopting the above technical solution, the cooling medium can be filled in the first cavity and the second cavity, so that the first stator assembly and the second stator assembly can be in more sufficient contact with the cooling medium, further improving the cooling efficiency of the stator, thereby further improving the working performance of the motor.

[0027] In some embodiments of the present application, the separator is further provided with a second through hole, the first through hole is located on the outer circumference side of the stator body, and the second through hole is located on the inner circumference side of the stator body.

[0028] By adopting the above technical solution, the difference between the injection amount of the cooling medium in the first cavity and the injection amount of the cooling medium in the second cavity is further reduced, so that the overall heat distribution of the stator becomes more balanced, thereby further improving the working performance of the motor.

[0029] In some embodiments of the present application, the number of cooling inlets and the number of cooling outlets are both multiple, at least one cooling inlet is directly connected to the first cavity, at least another cooling inlet is directly connected to the second cavity, at least one cooling outlet is directly connected to the first cavity, and at least another cooling outlet is directly connected to the second cavity.

[0030] By adopting the above technical solution, the cooling medium located in the first cavity and the cooling medium located in the second cavity can be made independent of each other, thereby effectively reducing the temperature difference between the first stator assembly and the second stator assembly, and further improving the working performance of the motor.

[0031] In some embodiments of the present application, the cooling inlet and the cooling outlet are respectively provided on opposite sides of the stator housing along the radial direction of the stator.

[0032] By adopting the above technical solution, the cooling medium can flow from the stator case along the radial side of the stator to the stator case along the radial side of the stator, so that the cooling medium can fully contact the stator body, further improving the cooling efficiency of the stator, thereby further improving the working performance of the motor.

[0033] In some embodiments of the present application, the stator further includes a three-phase line electrically connected to the stator body, and the three-phase line extends from the stator body to the outside of the cavity through a cooling outlet or a cooling inlet.

[0034] By adopting the above technical solution, the cooling medium can flow through the three-phase line to cool the three-phase line, further improving the cooling efficiency of the stator, thereby further improving the working performance of the motor.

[0035] In some embodiments of the present application, the first stator assembly includes a first stator block and a first winding, the first stator block is fixed on the partition, and the first winding is wound on the first stator block, and the second stator assembly includes a second stator block and a second winding, the second stator block is fixed on the partition, and the second winding is wound on the second stator block.

[0036] By adopting the above technical solution, it is convenient to fix the first stator assembly and the second stator assembly in the cavity, effectively improving the installation stability of the stator body, thereby further improving the working performance of the motor.

[0037] In some embodiments of the present application, a first positioning groove is provided on a side of the separator facing the first stator assembly, and the first stator block is inserted into the first positioning groove; a second positioning groove is provided on a side of the separator facing the second stator assembly, and the second stator block is inserted into the second positioning groove.

[0038] By adopting the above technical solution, the positions of the first stator block and the second stator block are effectively restricted, thereby further improving the installation stability of the stator body and further improving the working performance of the motor.

[0039] In some embodiments of the present application, the first stator block is bonded into the first positioning groove; and / or the second stator block is bonded into the second positioning groove.

[0040] By adopting the above technical solution, the positions of the first stator block and the second stator block can be more effectively limited, thereby further improving the installation stability of the stator body and further improving the working performance of the motor.

[0041] In some embodiments of the present application, the first positioning groove and the second positioning groove are communicated with each other along the axial direction of the stator, so that the first stator block can pass through the first positioning groove and abut against the second stator block.

[0042] By adopting the above technical solution, not only the relative position of the first stator block and the second stator block can be effectively limited, but also the integrity of the stator body is effectively improved, and the vibration of the stator body during operation is improved, thereby further improving the working performance of the motor.

[0043] In some embodiments of the present application, the stator case includes an outer frame, an inner frame, a first cover plate and a second cover plate. The inner frame is arranged in the outer frame and coaxially with the outer frame. The partition is connected between the outer frame and the inner frame. The first cover plate is arranged between the outer frame and the inner frame and is located on one side of the outer frame along the axial direction of the stator. The second cover plate is arranged between the outer frame and the inner frame and is located on the other side of the outer frame along the axial direction of the stator. The first stator block is fixedly connected to the first cover plate, and the second stator block is fixedly connected to the second cover plate.

[0044] By adopting the above technical solution, the stator body is not only fixedly mounted on the partition, but also fixedly connected to the first cover plate and the second cover plate, which not only further improves the installation stability of the stator body, but also during the operation of the motor, the torque borne by the stator body can be transmitted not only to the outer frame and the inner frame through the first cover plate and the second cover plate, but also to the outer frame and the inner frame through the partition, which can reduce the strength requirements of the first cover plate and the second cover plate, reduce the thickness of the first cover plate and the thickness of the second cover plate, thereby reducing the air gap of the motor and further improving the working performance of the motor.

[0045] In some embodiments of the present application, the first stator block includes a first iron core and a first insulating sleeve sleeve mounted on the first iron core, the first insulating sleeve is fixedly connected to the first cover plate, and the second stator block includes a second iron core and a second insulating sleeve sleeve mounted on the second iron core, the second insulating sleeve is fixedly connected to the second cover plate.

[0046] By adopting the above technical solution, it is convenient to fix the stator body between the first cover plate and the second cover plate.

[0047] In some embodiments of the present application, the first insulating sleeve is welded or bonded to the first cover plate; and / or the second insulating sleeve is welded or bonded to the second cover plate.

[0048] By adopting the above technical solution, it is convenient to fix the first stator block to the first cover plate and to fix the second stator block to the second cover plate.

[0049] In some embodiments of the present application, the first insulating sleeve includes a first insulating body sleeved on the first iron core and a first connecting boss connected to the first insulating body, the first connecting boss protrudes from the first insulating body along the axial direction of the stator and is fixedly connected to the first cover plate; and / or, the second insulating sleeve includes a second insulating body sleeved on the second iron core and a second connecting boss connected to the second insulating body, the second connecting boss protrudes from the second insulating body along the axial direction of the stator and is fixedly connected to the second cover plate.

[0050] By adopting the above technical solution, the connection strength between the first stator block and the first cover plate and the connection strength between the second stator block and the second cover plate are effectively improved, thereby further improving the installation stability of the stator body and further improving the working performance of the motor.

[0051] In some embodiments of the present application, a positioning portion is provided on the inner peripheral wall of the stator housing, and the positioning portion is embedded in the partition.

[0052] By adopting the above technical solution, the relative position of the separator and the stator shell is effectively limited, the connection strength between the separator and the stator shell is improved, thereby further improving the installation stability of the stator body and further improving the working performance of the motor.

[0053] In some embodiments of the present application, there are multiple positioning portions, and the multiple positioning portions are evenly distributed along the circumference of the stator case.

[0054] By adopting the above technical solution, the force on the separator along the circumference of the stator shell can be made more uniform, further improving the connection strength between the separator and the stator shell, thereby further improving the installation stability of the stator body and further improving the working performance of the motor.

[0055] In some embodiments of the present application, the separator is an injection-molded part.

[0056] By adopting the above technical solution, it is convenient to form the separator in the stator shell, which effectively simplifies the production process of the stator and improves the production efficiency of the stator.

[0057] An embodiment of the present application further provides a motor, comprising a housing and the stator described in any one of the above embodiments, wherein the stator is accommodated in the housing.

[0058] The motor provided by the embodiments of the present application has at least the following beneficial effects: the motor provided by the embodiments of the present application effectively improves the working performance of the motor due to the adoption of the stator of any of the above embodiments.

[0059] In some embodiments of the present application, the motor further includes a first rotor and a second rotor, both of which are accommodated in the housing, and the first rotor and the second rotor are disposed on opposite sides of the stator along the axial direction.

[0060] By adopting the above technical solution, the above motor can be made into a dual-rotor motor, which effectively improves the working performance of the dual-rotor motor.

[0061] An embodiment of the present application further provides an electric drive device, comprising the motor described in any one of the above embodiments.

[0062] The electric drive device provided by the embodiments of the present application has at least the following beneficial effects: the electric drive device provided by the embodiments of the present application effectively improves the working performance of the electric drive device because it adopts the motor described in any of the above embodiments.

[0063] An embodiment of the present application further provides an electric drive system, comprising a battery and the above-mentioned electric drive device, wherein the battery is electrically connected to the motor.

[0064] The electric drive system provided by the embodiment of the present application has at least the following beneficial effects: the electric drive system provided by the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device.

[0065] An embodiment of the present application further provides an electric device, comprising the above-mentioned electric drive device or the above-mentioned electric drive system.

[0066] The electric device provided by the embodiment of the present application has at least the following beneficial effects: the electric device provided by the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device or the above-mentioned electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0068] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0069] Figure 2 A schematic diagram of the explosion structure of a battery provided in an embodiment of the present application;

[0070] Figure 3 A schematic diagram of the structure of the electric drive device provided in an embodiment of the present application;

[0071] Figure 4 A schematic diagram of the structure of a motor provided in an embodiment of the present application;

[0072] Figure 5 A schematic structural diagram of a stator in a motor provided in one embodiment of the present application;

[0073] Figure 6 for Figure 5 The exploded structural diagram of the stator is shown;

[0074] Figure 7 for Figure 5 The main structural diagram of the stator shown;

[0075] Figure 8 for Figure 7 The cross-sectional structural diagram of the stator along the AA line is shown;

[0076] Figure 9 for Figure 8 The enlarged structural diagram of the stator at position B is shown;

[0077] Figure 10 A schematic structural diagram of a stator in a motor provided in another embodiment of the present application;

[0078] Figure 11 A schematic structural diagram of a stator in a motor provided in yet another embodiment of the present application;

[0079] Figure 12 A schematic structural diagram of a stator in a motor provided in yet another embodiment of the present application;

[0080] Figure 13 A schematic structural diagram of a stator in a motor provided in yet another embodiment of the present application;

[0081] Figure 14A schematic structural diagram of an outer frame in a stator provided in an embodiment of the present application;

[0082] Figure 15 This is a schematic structural diagram of the separator in the stator provided in an embodiment of the present application.

[0083] Among them, the reference numerals in the figures are:

[0084] 1. Electric drive device;

[0085] 10. Motor; 11. Stator; 111. Stator housing; 1111. Outer frame; 11111. Positioning portion; 1112. Inner frame; 1113. First cover plate; 1114. Second cover plate; 1115. Receptacle; 11151. First cavity; 11152. Second cavity; 1116. Cooling inlet; 1117. Cooling outlet; 112. Stator body; 1121. First stator assembly; 11211. First stator block; 11212. First insulating sleeve; 11213. First insulating body; 11214. First connecting boss; 1122. Second stator assembly; 11221. Second stator block; 11 222, second insulating sleeve; 11223, second insulating body; 11224, second connecting boss; 113, separator; 1131, first through hole; 1132, second through hole; 1133, first positioning groove; 1134, second positioning groove; 1135, connecting portion; 1136, separator; 114, first blocking member; 115, second blocking member; 116, three-phase line; 12, housing; 13, first rotor; 131, first rotor body; 132, first rotor shell; 133, first rotor cavity; 14, second rotor; 141, second rotor body; 142, second rotor shell; 143, second rotor cavity;

[0086] 20. Controller;

[0087] 30. Speed ​​changing mechanism;

[0088] 2. Battery;

[0089] 21. Box body; 211. First part; 212. Second part;

[0090] 22. Battery cells;

[0091] 3. Vehicle body. DETAILED DESCRIPTION

[0092] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0093] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0094] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0095] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature identified as "first," "second," or "third" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0096] An electric drive is the power unit of an electric device, and the motor is its core component, converting electrical energy into mechanical energy. A motor typically consists of a stator and a rotor. The stator consists of a stator housing and a stator body, which is fixedly mounted within the stator housing. During motor operation, current flows through the stator body, generating a magnetic field. This magnetic field creates a magnetic coupling between the rotor and the stator body, driving the rotor's rotation.

[0097] In the related art, the stator usually includes a winding and a plurality of stator blocks, and the winding is wound on the plurality of stator blocks to form the above-mentioned stator body. However, during the operation of the motor, once a short circuit fault or an open circuit fault occurs in the winding, the entire stator will not be able to continue to work, and the reliability performance is poor. In addition, when the current flows through the stator body, the stator body will generate heat, so the stator needs to be cooled. At present, a cooling channel for the circulation of the cooling medium is usually set on the wall of the motor housing. During the operation of the motor, the heat generated by the stator is transferred to the motor housing through the air. As the cooling medium continues to flow in the cooling channel, the heat on the housing is taken away to achieve cooling of the stator. However, since the heat generated by the stator needs to pass through the air and the motor housing in turn to be transferred to the cooling medium, the heat conduction efficiency is low, resulting in the heat on the stator cannot be quickly absorbed by the cooling medium, resulting in low cooling efficiency of the stator, which is not conducive to improving the working performance of the motor.

[0098] In order to improve the working performance of the motor, the stator body in the stator provided in the embodiment of the present application includes a first stator component and a second stator component. The first stator component and the second stator component can work independently of each other. When the first stator component fails to work normally, the stator can rely on the second stator component to continue working, thereby realizing a redundant design of the stator and effectively improving the reliability of the stator. Moreover, by fixing the first stator component and the second stator component in the first cavity and the second cavity respectively, and immersing at least part of the first stator component and at least part of the second stator component in the cooling medium, the first stator component and the second stator component can both be in direct contact with the cooling medium, effectively absorbing the heat generated by the first stator component and the second stator component, thereby improving the cooling efficiency of the stator and effectively improving the working performance of the motor.

[0099] The technical solutions described in the embodiments of the present application are applicable to motors, electric drive devices using motors, and electric devices using electric drive devices. Among them, electric devices can be, but are not limited to, vehicles, ships, spacecraft, and electric toys, etc. Vehicles can be fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include aircraft, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as electric car toys, electric ship toys, and electric airplane toys, etc.

[0100] For the convenience of description, the following embodiments are described by taking the electric device of one embodiment of the present application as a vehicle as an example.

[0101] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle includes a body 3, a battery 2, and an electric drive unit 1. The body 3 is the main supporting component of the vehicle and has an engine compartment and a passenger compartment. The engine compartment is used to accommodate the electric drive unit 1, and the passenger compartment is used to provide operating and seating space for the driver and passengers. When the vehicle is a front-wheel drive vehicle, the engine compartment is located at the front of the body 3, that is, the engine compartment is the front engine compartment. When the vehicle is a rear-wheel drive vehicle, the engine compartment is located at the rear of the body 3, that is, the engine compartment is the rear engine compartment. When the vehicle 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 body 3 and the rear engine compartment located at the rear of the body 3. The number of electric drive units 1 can be two, with two electric drive units 1 located in the front and rear engine compartments respectively. The battery 2 and the electric drive unit 1 together constitute the vehicle's electric drive system. The battery 2 can be located at the bottom, front, or rear of the vehicle and can be used to power the electric drive unit 1 to drive its operation. The electric drive device 1 is used to convert the electrical energy provided by the battery 2 into mechanical energy and output the mechanical energy to the wheels of the vehicle to drive the vehicle.

[0102] See also Figure 2 , Figure 2 This is an exploded diagram of a battery 2 provided in an embodiment of the present application. The battery 2 includes a housing 21 and a battery cell 22, with the battery cell 22 being housed within the housing 21. The housing 21 is used to provide a storage space for the battery cell 22, and the housing 21 can have a variety of structures. In some embodiments, the housing 21 can include a first portion 211 and a second portion 212, which cover each other and together define a storage space for the battery cell 22. The second portion 212 can be a hollow structure with one end open, and the first portion 211 can be a plate-like structure. The first portion 211 covers the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. The first portion 211 and the second portion 212 can also be hollow structures with one end open, with the open side of the first portion 211 covering the open side of the second portion 212, so that the first portion 211 and the second portion 212 together define a storage space. Of course, the box body 21 formed by the first part 211 and the second part 212 can be in various shapes, such as a cylinder, a cuboid, etc., which is not specifically limited here.

[0103] In some embodiments, the box 21 can be used as a part of the chassis structure of the vehicle. For example, part of the box 21 can become at least a part of the floor of the vehicle, or part of the box 21 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0104] Of course, in some embodiments, the battery 2 may not include the box body 21 , but rather a plurality of battery cells 22 may be electrically connected and formed into a whole through necessary fixing structures before being assembled into a vehicle.

[0105] The battery 2 may include multiple battery cells 22, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the battery cells 22. The battery cells 22 may be directly connected in series, in parallel, or in a hybrid configuration, and the entire battery cell 22 may then be housed within the housing 21. Alternatively, the battery 2 may include multiple battery cells 22 connected in series, in parallel, or in a hybrid configuration to form a battery module, which is then further connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 21. The battery 2 may also include other functional components, such as a busbar for electrically connecting the multiple battery cells 22.

[0106] Each battery cell 22 may be a secondary battery cell or a primary battery cell. A secondary battery cell refers to a battery cell 22 that can be recharged to activate the active material after the battery cell 22 is discharged and can continue to be used. A primary battery cell refers to a battery cell 22 that cannot be recharged to activate the active material after the battery cell 22 has exhausted its electrical energy and can continue to be used. The battery cell 22 may also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc., but is not limited thereto. The battery cell 22 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 22 of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal prismatic battery cells, are not particularly limited in this application.

[0107] See also Figure 3 , Figure 3 Schematic diagram of the structure of the electric drive device 1 provided in an embodiment of the present application. The electric drive device 1 includes a motor 10, which is used to convert the electrical energy provided by the battery 2 into mechanical energy. Specifically, the motor 10 generally includes a stator 11 and a rotor. During the operation of the motor 10, current flows through the stator 11, causing the stator 11 to generate a magnetic field. Under the action of the magnetic field, the rotor is magnetically coupled to the stator 11 to drive the rotor to rotate. The motor 10 can be, but is not limited to, an axial flux motor, a radial flux motor, a servo motor, a brushed motor, a brushless motor, etc. In some embodiments, the number of motors 10 is two, and the two motors 10 are coaxially arranged, that is, the central axes of the two motors 10 coincide with each other, and the "central axis" of the motor 10 refers to the axial center line of the rotating shaft (or "rotor shaft") of the motor 10. For example, the rotating shaft of one motor 10 is connected to one of the left front wheel and the right front wheel of the vehicle, and the rotating shaft of the other motor 10 is connected to the other of the left front wheel and the right front wheel of the vehicle. Alternatively, the rotating shaft of one motor 10 is connected to one of the left rear wheel and the right rear wheel of the vehicle, and the rotating shaft of the other motor 10 is connected to the other of the left rear wheel and the right rear wheel of the vehicle. During operation of the electric drive device 1, the rotational speeds of the two motors 10 can be the same or different.

[0108] Of course, in other embodiments, the number of motor 10 may also be one.

[0109] In some embodiments, the electric drive device 1 may further include a controller 20. The controller 20 is configured to convert the direct current output by the battery 2 into alternating current and transmit the alternating current to the motor 10. The controller 20 may also be configured to control the operation of the motor 10. For example, the controller 20 is configured to control the start / stop, speed, torque, etc. of the motor 10. In other words, the motor 10 and the battery 2 are both electrically connected to the controller 20. The direct current output by the battery 2 may be transmitted to the controller 20 via a current transmission path between the battery 2 and the controller 20. After the controller 20 converts the direct current into alternating current, the alternating current may be transmitted to the motor 10 via a current transmission path between the controller 20 and the motor 10 to drive the motor 10 to operate. At the same time, control signals from the controller 20 may be transmitted to the motor 10 via the current transmission path between the controller 20 and the motor 10. An operating status signal of the motor 10 may also be transmitted to the controller 20 via the current transmission path between the controller 20 and the motor 10, enabling the controller 20 to control the operation of the motor 10.

[0110] In some embodiments, the electric drive device 1 may further include a speed change mechanism 30, which is used to transmit the mechanical energy to the vehicle's wheels by changing the speed and torque of the motor 10. For example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by reducing the speed of the motor 10 and increasing the torque of the motor 10. In another example, the speed change mechanism 30 transmits the mechanical energy to the vehicle's wheels by increasing the speed of the motor 10 and reducing the torque of the motor 10. The speed change mechanism 30 may be, but is not limited to, a pinion speed change mechanism, a worm speed change mechanism, a planetary gear speed change mechanism, a continuously variable speed change mechanism, or the like.

[0111] In order to illustrate the technical solution provided by this application, a detailed description is given below with reference to specific drawings and embodiments.

[0112] First, please refer to Figures 5 to 8 The embodiment of the present application provides a stator 11, comprising a stator housing 111, a partition 113, and a stator body 112. The stator housing 111 has a cavity 1115, and the partition 113 is fixedly disposed in the cavity 1115 and divides the cavity 1115 into a first cavity 11151 and a second cavity 11152. The first cavity 11151 and the second cavity 11152 are both used to accommodate a cooling medium. The stator body 112 comprises a first stator assembly 1121 and a second stator assembly 1122. The first stator assembly 1121 is fixedly disposed in the first cavity 11151, and the second stator assembly 1122 is fixedly disposed in the second cavity 11152. At least a portion of the first stator assembly 1121 and at least a portion of the second stator assembly 1122 are both immersed in the cooling medium.

[0113] The stator housing 111 provides an internal environment for the stator 11. At least a portion of this internal environment constitutes the aforementioned cavity 1115, which is used to accommodate the stator body 112 and the separator 113. The stator housing 111 can be a one-piece component or an assembled component composed of multiple parts. The material of the stator housing 111 can include, but is not limited to, aluminum alloy, stainless steel, aluminum, copper, iron, plastic, and the like.

[0114] The separator 113 is used to separate the cavity 1115 into a first cavity 11151 and a second cavity 11152. It is understood that the first cavity 11151 and the second cavity 11152 are distributed along the axis of the stator 11. The material of the separator 113 can be, but is not limited to, aluminum alloy, stainless steel, aluminum, copper, iron, plastic, etc.

[0115] In some embodiments, the separator 113 is fixedly connected to the stator housing 111. The fixed connection method of the separator 113 and the stator housing 111 may be, but is not limited to, welding, bonding, fastening, etc. As an example, the separator 113 may include a connecting portion 1135 and a dividing portion 1136. The connecting portion 1135 is fixedly connected to the stator housing 111. The dividing portion 1136 is connected to the connecting portion 1135 to separate the accommodating cavity 1115 into a first cavity 11151 and a second cavity 11152. The connecting portion 1135 and the dividing portion 1136 may be integrally molded components, or they may be separately molded and then connected to form a single unit.

[0116] The stator body 112 is the core component of the stator 11 and is used to generate a magnetic field. The first stator assembly 1121 and the second stator assembly 1122 are two parts of the stator body 112. The first stator assembly 1121 and the second stator assembly 1122 can independently generate a magnetic field to drive the rotor to rotate. In other words, the rotor can rotate solely under the influence of the magnetic field generated by the first stator assembly 1121, or solely under the influence of the magnetic field generated by the second stator assembly 1122, or under the combined influence of the magnetic fields generated by the first stator assembly 1121 and the second stator assembly 1122.

[0117] The first stator assembly 1121 is fixedly disposed within the first cavity 11151. The first stator assembly 1121 can be fixedly mounted on the stator housing 111 or the partition 113. The second stator assembly 1122 is fixedly disposed within the second cavity 11152. The second stator assembly 1122 can be fixedly mounted on the stator housing 111 or the partition 113. When both the first cavity 11151 and the second cavity 11152 contain cooling medium, the first stator assembly 1121 can be partially or completely immersed in the cooling medium, and the second stator assembly 1122 can be partially or completely immersed in the cooling medium.

[0118] The cooling medium is used to absorb heat generated by the stator body 112 and other heat-generating components. The cooling medium can be statically contained within the first cavity 11151 and the second cavity 11152, or it can circulate into the first cavity 11151 and the second cavity 11152. The cooling medium can optionally be, but is not limited to, cooling oil, cooling water, or the like, and is not specifically limited here.

[0119] The stator body 112 in the stator 11 provided in the embodiment of the present application includes a first stator assembly 1121 and a second stator assembly 1122. The first stator assembly 1121 and the second stator assembly 1122 can operate independently of each other. When the first stator assembly 1121 fails to operate normally, the stator 11 can continue to operate by relying on the second stator assembly 1122, thereby realizing a redundant design of the stator 11 and effectively improving the reliability of the stator 11. Moreover, by fixing the first stator assembly 1121 and the second stator assembly 1122 in the first cavity 11151 and the second cavity 11152 respectively, and immersing at least a portion of the first stator assembly 1121 and at least a portion of the second stator assembly 1122 in a cooling medium, the first stator assembly 1121 and the second stator assembly 1122 can both be in direct contact with the cooling medium, effectively absorbing the heat generated by the first stator assembly 1121 and the second stator assembly 1122, thereby improving the cooling efficiency of the stator 11 and effectively improving the operating performance of the motor 10.

[0120] In some embodiments of this application, please refer to Figure 8 、 Figures 10 to 13 The stator housing 111 is provided with a cooling inlet 1116 and a cooling outlet 1117 , both of which are connected to the cavity 1115 , so that the cooling medium can flow into the cavity 1115 through the cooling inlet 1116 or flow out of the cavity 1115 through the cooling outlet 1117 .

[0121] The cooling inlet 1116 is used to provide a path for the cooling medium to enter the cavity 1115, and the cooling outlet 1117 is used to provide a path for the cooling medium to flow out of the cavity 1115. The cooling inlet 1116 and the cooling outlet 1117 can be provided on any wall of the stator housing 111. As an example, the cooling inlet 1116 and the cooling outlet 1117 can be provided on the end wall of the stator housing 111. As an example, the cooling inlet 1116 and the cooling outlet 1117 can be provided on the outer peripheral wall of the stator housing 111. The number of cooling inlets 1116 and the number of cooling outlets 1117 can be one or more, and the number of cooling outlets 1117 can be one or more, depending on the actual application requirements.

[0122] In some embodiments, the cooling inlet 1116 can be connected to the outlet pipe of the liquid supply device, so that the cooling medium is input from the outlet of the liquid supply device into the cavity 1115 through the cooling inlet 1116. The cooling outlet 1117 can be connected to the liquid storage container or the return pipe of the liquid supply device, so that the cooling medium can be discharged from the cavity 1115 to the liquid storage container or the liquid supply device through the cooling outlet 1117.

[0123] By adopting the above technical solution, it is convenient to input the cooling medium into the cavity 1115 or output the cooling medium to the outside of the cavity 1115.

[0124] In some embodiments of this application, please refer to Figure 8 and Figure 15 The separator 113 defines a first through hole 1131 , and the first through hole 1131 is used to connect the first cavity 11151 and the second cavity 11152 .

[0125] The first via 1131 is used to provide a flow path for the cooling medium between the first cavity 11151 and the second cavity 11152. It is understood that the first via 1131 extends from the side of the partition 113 facing the first cavity 11151 to the side of the partition 113 facing the second cavity 11152. The number of first vias 1131 can be one or more, depending on the actual application needs. When there is only one first via 1131, the cooling medium can enter the second cavity 11152 from the first cavity 11151 through the first via 1131, or enter the first cavity 11151 from the second cavity 11152 through the first via 1131. When there are multiple first vias 1131, the cooling medium can flow from the first cavity 11151 through at least one first via 1131 into the second cavity 11152, or from the second cavity 11152 through at least another first via 1131 into the first cavity 11151. The specific flow direction of the cooling medium in the first vias 1131 is not limited herein.

[0126] In some embodiments, there are multiple first through holes 1131 , and the multiple first through holes 1131 are evenly distributed along the circumference of the stator 11 .

[0127] By adopting the above technical solution, the cooling medium can flow between the first cavity 11151 and the second cavity 11152, effectively reducing the difference between the injection amount of the cooling medium in the first cavity 11151 and the injection amount of the cooling medium in the second cavity 11152, making the overall heat distribution of the stator 11 more balanced, thereby further improving the working performance of the motor 10.

[0128] In some embodiments of this application, please refer to Figure 8 The cooling inlet 1116 and the cooling outlet 1117 are respectively arranged on opposite sides of the stator housing 111 along the radial direction of the stator 11 .

[0129] In some embodiments, the cooling inlet 1116 and the cooling outlet 1117 are opened on the outer peripheral wall of the stator housing 111 , and the cooling inlet 1116 and the cooling outlet 1117 are respectively located on opposite sides of the outer peripheral wall of the stator housing 111 along the radial direction of the stator 11 .

[0130] In other embodiments, the cooling inlet 1116 and the cooling outlet 1117 are opened on the same end wall of the stator housing 111 , and the cooling inlet 1116 and the cooling outlet 1117 are respectively located on opposite sides of the end wall of the stator housing 111 along the radial direction of the stator 11 .

[0131] In some other embodiments, the cooling inlet 1116 is opened on one end wall of the stator case 111 , and the cooling outlet 1117 is opened on the other end wall of the stator case 111 , and the cooling inlet 1116 and the cooling outlet 1117 are respectively located on opposite sides of the stator case 111 along the radial direction of the stator 11 .

[0132] By adopting the above technical solution, the cooling medium can flow from the stator case 111 along the radial side of the stator 11 to the stator case 111 along the radial side of the stator 11, so that the cooling medium can fully contact the stator body 112, further improving the cooling efficiency of the stator 11, thereby further improving the working performance of the motor 10.

[0133] In some embodiments of this application, please refer to Figure 8 The cooling inlet 1116 and the cooling outlet 1117 are both directly connected to the first cavity 11151 . The stator 11 further includes a first blocking member 114 , which is disposed in the first cavity 11151 .

[0134] The cooling inlet 1116 and the cooling outlet 1117 are both directly connected to the first cavity 11151, which means that the cooling medium can enter the internal environment of the first cavity 11151 after passing through the cooling inlet 1116, and the cooling medium located in the first cavity 11151 can directly enter the cooling outlet 1117 from the first cavity 11151 and flow out of the outside of the first cavity 11151 through the cooling outlet 1117.

[0135] The first barrier 114 is a component used to increase the flow resistance of the cooling medium within the first cavity 11151. It is understood that the first barrier 114 is disposed within the space between the stator body 112 and the inner wall of the stator housing 111. For example, the first barrier 114 is disposed within the space between the first stator assembly 1121 and the inner wall of the outer peripheral wall of the stator housing 111. For example, the first barrier 114 is disposed within the space between the first stator assembly 1121 and the inner wall of the inner peripheral wall of the stator housing 111. The first barrier 114 may be, but is not limited to, a barrier bar, a barrier plate, or a barrier diaphragm. The number of first barriers 114 may be one or more, depending on the specific application needs. In some embodiments, when there are multiple first blocking members 114, the first blocking members 114 are disposed in the space between the first stator assembly 1121 and the inner wall surface of the outer circumferential wall of the stator housing 111, and at least two first blocking members 114 are disposed on opposite sides of the first stator assembly 1121 along the radial direction of the stator 11. In other embodiments, when there are multiple first blocking members 114, the first blocking members 114 are disposed in the space between the first stator assembly 1121 and the inner wall surface of the inner circumferential wall of the stator housing 111, and at least two first blocking members 114 are disposed on opposite sides of the inner circumferential wall of the stator housing 111 along the radial direction of the stator 11.

[0136] In this embodiment, after the cooling medium enters the first cavity 11151 through the cooling inlet 1116, a portion of the cooling medium flows through the first stator assembly 1121 along the radial direction of the stator 11 to cool the first stator assembly 1121, and another portion of the cooling medium enters the second cavity 11152 through the first through hole 1131 and flows through the second stator assembly 1122 along the radial direction of the stator 11 to cool the second stator assembly 1122. The two portions of cooling medium can be combined and flow out to the outside of the cavity 1115 through the same cooling outlet 1117, or they can flow out to the outside of the cavity 1115 through different cooling outlets 1117 respectively.

[0137] By adopting the above-mentioned technical solution, under the blocking action of the first blocking member 114, the flow rate of the cooling medium located in the first cavity 11151 can be effectively reduced, so that as much cooling medium as possible can enter the second cavity 11152 through the first through hole 1131, so as to reduce the flow difference of the cooling medium in the first cavity 11151 and the second cavity 11152, thereby reducing the temperature difference between the first stator assembly 1121 and the second stator assembly 1122, and further improving the working performance of the motor 10.

[0138] In some embodiments of this application, please refer to Figure 8 The stator 11 further includes a second blocking member 115 , which is disposed in the first cavity 11151 and located on the inner circumference of the first stator assembly 1121 , and the first blocking member 114 is located on the outer circumference of the first stator assembly 1121 .

[0139] The second barrier 115 is a component used to increase the flow resistance of the cooling medium within the first cavity 11151. The second barrier 115 may be, but is not limited to, a barrier bar, a barrier plate, or a barrier diaphragm. The second barrier 115 is disposed within the first cavity 11151 and on the inner circumference of the first stator assembly 1121. Specifically, the second barrier 115 is disposed within the space between the first stator assembly 1121 and the inner wall surface of the inner circumferential wall of the stator housing 111. The first barrier 114 is located on the outer circumference of the first stator assembly 1121. Specifically, the first barrier 114 is disposed within the space between the first stator assembly 1121 and the inner wall surface of the outer circumferential wall of the stator housing 111. The number of second barriers 115 may be one or more, depending on the specific application needs. In some embodiments, when there are multiple second barriers 115, at least two second barriers 115 are disposed on opposite sides of the inner circumferential wall of the stator housing 111 along the radial direction of the stator 11. In some embodiments, when the number of first blocking members 114 and the number of second blocking members 115 are both plural, at least two first blocking members 114 are disposed on opposite sides of the first stator assembly 1121 along the radial direction of the stator 11, and at least two second blocking members 115 are disposed on opposite sides of the inner circumferential wall of the stator housing 111 along the radial direction of the stator 11.

[0140] By adopting the above-mentioned technical solution, the flow rate of the cooling medium in the first cavity 11151 is further reduced, so that more cooling medium can enter the second cavity 11152 through the first through hole 1131, so as to further reduce the flow difference of the cooling medium in the first cavity 11151 and the second cavity 11152, thereby further reducing the temperature difference between the first stator assembly 1121 and the second stator assembly 1122, and further improving the working performance of the motor 10.

[0141] In some embodiments of this application, please refer to Figure 10 There are multiple cooling inlets 1116 , at least one cooling inlet 1116 is directly connected to the first cavity 11151 , and at least another cooling inlet 1116 is directly connected to the second cavity 11152 .

[0142] In some embodiments, there are two cooling inlets 1116 , one cooling inlet 1116 is directly connected to the first cavity 11151 , and the other cooling inlet 1116 is directly connected to the second cavity 11152 .

[0143] Of course, in other embodiments, there may be more than two cooling inlets 1116 .

[0144] In some embodiments, the cooling outlet 1117 is directly connected to the first cavity 11151, and a portion of the cooling medium enters the first cavity 11151 through at least one cooling inlet 1116 and flows through the first stator assembly 1121 along the radial direction of the stator 11 to cool the first stator assembly 1121. Another portion of the cooling medium enters the second cavity 11152 through at least another cooling inlet 1116 and flows through the second stator assembly 1122 along the radial direction of the stator 11 to cool the second stator assembly 1122. The cooling medium located in the second cavity 11152 enters the first cavity 11151 through the first through hole 1131, and then merges with the cooling medium located in the first cavity 11151 and flows out to the outside of the cavity 1115 through the cooling outlet 1117.

[0145] In other embodiments, the cooling outlet 1117 is directly connected to the second cavity 11152, and a portion of the cooling medium enters the first cavity 11151 through at least one cooling inlet 1116 and flows through the first stator assembly 1121 along the radial direction of the stator 11 to cool the first stator assembly 1121. Another portion of the cooling medium enters the second cavity 11152 through at least another cooling inlet 1116 and flows through the second stator assembly 1122 along the radial direction of the stator 11 to cool the second stator assembly 1122. The cooling medium located in the first cavity 11151 enters the second cavity 11152 through the first through hole 1131, and then merges with the cooling medium located in the second cavity 11152 and flows out to the outside of the cavity 1115 through the cooling outlet 1117.

[0146] By adopting the above technical solution, the cooling medium can be transported to the first cavity 11151 and the second cavity 11152 respectively, so that a part of the cooling medium flows through the first stator assembly 1121 to cool the first stator assembly 1121, and the other part of the cooling medium flows through the second stator assembly 1122 to cool the second stator assembly 1122, thereby effectively reducing the temperature difference between the first stator assembly 1121 and the second stator assembly 1122, and further improving the working performance of the motor 10.

[0147] In some embodiments of this application, please refer to Figure 10 The cooling outlet 1117 is arranged opposite to the first through hole 1131 .

[0148] The cooling outlet 1117 and the first through hole 1131 are arranged opposite each other, which means that the cooling outlet 1117 and the first through hole 1131 are arranged in any direction, that is, at least part of the projection of the cooling outlet 1117 along this direction coincides with at least part of the projection of the first through hole 1131 along this direction.

[0149] In some embodiments, along the axial direction of the stator 11 , the cooling outlet 1117 is disposed opposite to the first through hole 1131 .

[0150] By adopting the above technical solution, one of the cooling medium located in the first cavity 11151 and the cooling medium located in the second cavity 11152 can flow out directly to the outside of the cavity 1115 through the cooling outlet 1117, while the other of the cooling medium located in the first cavity 11151 and the cooling medium located in the second cavity 11152 can flow out to the outside of the cavity 1115 through the first through hole 1131 and the cooling outlet 1117 in sequence, thereby effectively improving the discharge efficiency of the cooling medium.

[0151] In some embodiments of this application, please refer to Figure 11 and Figure 12 The cooling inlet 1116 is directly connected to the first cavity 11151 , and the cooling outlet 1117 is directly connected to the second cavity 11152 .

[0152] In this embodiment, the cooling medium enters the first cavity 11151 through the cooling inlet 1116 and flows through the first stator assembly 1121 to cool the first stator assembly 1121. Subsequently, the cooling medium enters the second cavity 11152 through the first through hole 1131 and flows through the second stator assembly 1122 to cool the second stator assembly 1122. Finally, the cooling medium flows out to the outside of the cavity 1115 through the cooling outlet 1117.

[0153] By adopting the above technical solution, the cooling medium can flow through the first cavity 11151 and the second cavity 11152 in sequence to cool the first stator assembly 1121 and the second stator assembly 1122, so that the first stator assembly 1121 and the second stator assembly 1122 can be fully in contact with the cooling medium, further improving the cooling efficiency of the stator 11, thereby further improving the working performance of the motor 10.

[0154] In some embodiments of this application, please refer to Figure 12 The cooling inlet 1116 and the cooling outlet 1117 are both arranged at the top of the stator housing 111 .

[0155] The top of the stator housing 111 and the bottom of the stator housing 111 can be two parts of the stator housing 111 divided by the central axis of the stator 11, wherein the bottom of the stator housing 111 refers to the part of the stator housing 111 closest to the ground plane, and the top of the stator housing 111 refers to the part of the stator housing 111 farthest from the ground plane.

[0156] In this embodiment, the cooling medium enters the first cavity 11151 through the cooling inlet 1116, and the cooling medium flows from the top of the first cavity 11151 to the bottom of the first cavity 11151 and flows through the first stator assembly 1121. When the cooling medium reaches the first through hole 1131, the cooling medium enters the second cavity 11152 through the first through hole 1131 and flows to the bottom of the second cavity 11152 until the cooling medium fills the cavity 1115 and flows out to the outside of the second cavity 11152 through the cooling outlet 1117. At this time, the entire first stator assembly 1121 and the entire second stator assembly 1122 are immersed in the cooling medium to cool the first stator assembly 1121 and the second stator assembly 1122.

[0157] In other embodiments of this application, please refer to Figure 11 The cooling inlet 1116 is disposed at the bottom of the stator housing 111 , and the cooling outlet 1117 is disposed at the top of the stator housing 111 .

[0158] In this embodiment, the cooling medium enters the first cavity 11151 through the cooling inlet 1116, and the cooling medium flows from the bottom of the first cavity 11151 to the top of the first cavity 11151 and flows through the first stator assembly 1121. When the cooling medium reaches the first through hole 1131, the cooling medium enters the second cavity 11152 through the first through hole 1131 and flows to the bottom of the second cavity 11152 until the cooling medium fills the cavity 1115 and flows out to the outside of the second cavity 11152 through the cooling outlet 1117. At this time, the entire first stator assembly 1121 and the entire second stator assembly 1122 are immersed in the cooling medium to cool the first stator assembly 1121 and the second stator assembly 1122.

[0159] By adopting the above technical solution, the cooling medium can be filled in the first cavity 11151 and the second cavity 11152, so that the first stator assembly 1121 and the second stator assembly 1122 can be in more sufficient contact with the cooling medium, further improving the cooling efficiency of the stator 11, thereby further improving the working performance of the motor 10.

[0160] In some embodiments of this application, please refer to Figure 8 、 Figures 10 to 12 The separator 113 further defines a second through hole 1132 . The first through hole 1131 is located on the outer circumference of the stator body 112 , and the second through hole 1132 is located on the inner circumference of the stator body 112 .

[0161] The second via 1132 is used to provide a flow path for the cooling medium between the first cavity 11151 and the second cavity 11152. It is understood that the second via 1132 extends from the side of the partition 113 facing the first cavity 11151 to the side of the partition 113 facing the second cavity 11152. The number of second vias 1132 can be one or more, depending on actual application needs.

[0162] In some embodiments, the number of the first via holes 1131 and the number of the second via holes 1132 are both plural, the multiple first via holes 1131 are evenly distributed along the circumference of the stator 11 , and the multiple second via holes 1132 are evenly distributed along the circumference of the stator 11 .

[0163] By adopting the above technical solution, the difference between the injection amount of the cooling medium in the first cavity 11151 and the injection amount of the cooling medium in the second cavity 11152 is further reduced, so that the overall heat distribution of the stator 11 becomes more balanced, thereby further improving the working performance of the motor 10.

[0164] In some embodiments of this application, please refer to Figure 13The number of cooling inlets 1116 and the number of cooling outlets 1117 are both multiple, at least one cooling inlet 1116 is directly connected to the first cavity 11151, at least another cooling inlet 1116 is directly connected to the second cavity 11152, at least one cooling outlet 1117 is directly connected to the first cavity 11151, and at least another cooling outlet 1117 is directly connected to the second cavity 11152.

[0165] It should be noted that, in this embodiment, the first cavity 11151 and the second cavity 11152 are not directly connected, that is, the cooling medium in the first cavity 11151 and the cooling medium in the second cavity 11152 are not mixed.

[0166] In some embodiments, the number of cooling inlets 1116 and the number of cooling outlets 1117 are both two, one cooling inlet 1116 is directly connected to the first cavity 11151, and the other cooling inlet 1116 is directly connected to the second cavity 11152, one cooling outlet 1117 is directly connected to the first cavity 11151, and the other cooling outlet 1117 is directly connected to the second cavity 11152.

[0167] In this embodiment, a portion of the cooling medium enters the first cavity 11151 through at least one cooling inlet 1116 and flows through the first stator assembly 1121 to cool the first stator assembly 1121, and finally flows out to the outside of the first cavity 11151 through the cooling outlet 1117 directly connected to the first cavity 11151, and another portion of the cooling medium enters the second cavity 11152 through at least another cooling inlet 1116 and flows through the second stator assembly 1122 to cool the second stator assembly 1122, and finally flows out to the outside of the second cavity 11152 through the cooling outlet 1117 directly connected to the second cavity 11152.

[0168] By adopting the above technical solution, the cooling medium located in the first cavity 11151 and the cooling medium located in the second cavity 11152 can be made independent of each other, thereby effectively reducing the temperature difference between the first stator assembly 1121 and the second stator assembly 1122, and further improving the working performance of the motor 10.

[0169] In some embodiments of this application, please refer to Figure 13 The cooling inlet 1116 and the cooling outlet 1117 are respectively arranged on opposite sides of the stator housing 111 along the radial direction of the stator 11 .

[0170] In this embodiment, a portion of the cooling medium enters the first cavity 11151 through at least one cooling inlet 1116 and flows through the first stator assembly 1121 along the radial direction of the stator 11 to cool the first stator assembly 1121, and finally flows out to the outside of the first cavity 11151 through the cooling outlet 1117 directly connected to the first cavity 11151. Another portion of the cooling medium enters the second cavity 11152 through at least another cooling inlet 1116 and flows through the second stator assembly 1122 along the radial direction of the stator 11 to cool the second stator assembly 1122, and finally flows out to the outside of the second cavity 11152 through the cooling outlet 1117 directly connected to the second cavity 11152.

[0171] By adopting the above technical solution, the cooling medium can flow from the stator case 111 along the radial side of the stator 11 to the stator case 111 along the radial side of the stator 11, so that the cooling medium can fully contact the stator body 112, further improving the cooling efficiency of the stator 11, thereby further improving the working performance of the motor 10.

[0172] In some embodiments of this application, please refer to Figure 8 、 Figures 10 to 13 The stator 11 further includes a three-phase line 116 electrically connected to the stator body 112 . The three-phase line 116 extends from the stator body 112 to the outside of the cavity 1115 via the cooling outlet 1117 or the cooling inlet 1116 .

[0173] The three-phase wire 116 is used to input or output current to the stator body 112. The connection between the three-phase wire 116 and the stator body 112 may be, but is not limited to, welding or fastening. The three-phase wire 116 may be round or flat. The material of the three-phase wire 116 may be, but is not limited to, copper, aluminum, aluminum alloy, iron, stainless steel, etc.

[0174] In some embodiments, the three-phase line 116 extends from the stator body 112 to the outside of the cavity 1115 through the cooling outlet 1117 .

[0175] In other embodiments, the three-phase line 116 extends from the stator body 112 to the outside of the cavity 1115 through the cooling inlet 1116 .

[0176] In some embodiments, the stator 11 is housed in the housing 12 of the motor 10, and the three-phase line 116 extends from the cavity 1115 into the separation space between the housing 12 and the stator 11 via the cooling outlet 1117 or the cooling inlet 1116. Accordingly, the cooling medium can also flow from the cavity 1115 into the separation space between the housing 12 and the stator 11 via the cooling outlet 1117.

[0177] By adopting this technical solution, the cooling medium can flow through the three-phase wire 116 to cool the three-phase wire 116, further improving the cooling efficiency of the stator 11 and thus the operating performance of the motor 10. In addition, because the three-phase wire 116 extends from the stator body 112 through the cooling outlet 1117 or the cooling inlet 1116 to the outside of the cavity 1115, compared with traditional wire outlet methods that provide additional wire outlets in the stator housing 111, there is no need to consider the sealing of the wire outlets, effectively simplifying the structure of the stator 11.

[0178] In some embodiments of this application, please refer to Figure 9 The first stator assembly 1121 includes a first stator block 11211 and a first winding (not shown in the figure). The first stator block 11211 is fixed on the partition 113, and the first winding is wound on the first stator block 11211. The second stator assembly 1122 includes a second stator block 11221 and a second winding (not shown in the figure). The second stator block 11221 is fixed on the partition 113, and the second winding is wound on the second stator block 11221.

[0179] The first and second windings are components for generating a magnetic field, while the first and second stator blocks 11211 and 11221 are components for conducting the magnetic field. Specifically, the first winding is wound around the first stator block 11211, and the second winding is wound around the second stator block 11221. During operation of the motor 10, current is passed through the first and second windings to generate a magnetic field. The first and second stator blocks 11211 and 11221 conduct the magnetic field, causing it to act on the rotor of the motor 10, driving the rotor to rotate.

[0180] In some embodiments, there are multiple first stator blocks 11211 and multiple first windings. Multiple first stator blocks 11211 are arranged around the axis of the stator 11, and multiple first windings are wound around the multiple first stator blocks 11211 in a one-to-one correspondence to form a portion of the stator body 112. There are multiple second stator blocks 11221 and multiple second windings. Multiple second stator blocks 11221 are arranged around the axis of the stator 11, and multiple second windings are wound around the multiple second stator blocks 11221 in a one-to-one correspondence to form another portion of the stator body 112. The two portions of the stator body 112 operate independently of each other.

[0181] The first stator block 11211 is fixedly mounted on the side of the separator 113 facing the first cavity 11151, and the second stator block 11221 is fixedly mounted on the other side of the separator 113 facing the second cavity 11152. The first stator block 11211 and the separator 113 may be connected by, but is not limited to, bonding, welding, or threading. The second stator block 11221 and the separator 113 may be connected by, but is not limited to, bonding, welding, or threading.

[0182] By adopting the above technical solution, it is convenient to fix the first stator assembly 1121 and the second stator assembly 1122 in the cavity 1115, effectively improving the installation stability of the stator body 112, thereby further improving the working performance of the motor 10.

[0183] In some embodiments of this application, please refer to Figure 9 and Figure 15 A first positioning groove 1133 is formed on the side of the separator 113 facing the first stator assembly 1121, and the first stator block 11211 is inserted into the first positioning groove 1133. A second positioning groove 1134 is formed on the side of the separator 113 facing the second stator assembly 1122, and the second stator block 11221 is inserted into the second positioning groove 1134.

[0184] The side of the separator 113 facing the first stator block 11211 is recessed along the axis of the stator 11 to form the aforementioned first positioning slot 1133. The first stator block 11211 is inserted into the first positioning slot 1133 to restrict movement of the first stator block 11211 in a direction perpendicular to the axis of the stator 11. It is understood that the inner circumferential contour of the first positioning slot 1133 matches the outer circumferential contour of the end of the first stator block 11211 facing the separator 113. For example, both the inner circumferential contour of the first positioning slot 1133 and the outer circumferential contour of the end of the first stator block 11211 facing the separator 113 may be trapezoidal. If there are multiple first stator blocks 11211, there may also be multiple first positioning slots 1133, with each of the multiple first stator blocks 11211 corresponding to the multiple first positioning slots 1133.

[0185] The side of the separator 113 facing the second stator block 11221 is recessed along the axis of the stator 11 to form the aforementioned second positioning slot 1134. The second stator block 11221 is inserted into the second positioning slot 1134 to restrict movement of the second stator block 11221 in a direction perpendicular to the axis of the stator 11. It is understood that the inner circumferential contour of the second positioning slot 1134 matches the outer circumferential contour of the end of the second stator block 11221 facing the separator 113. For example, both the inner circumferential contour of the second positioning slot 1134 and the outer circumferential contour of the end of the second stator block 11221 facing the separator 113 may be trapezoidal. If there are multiple second stator blocks 11221, there may also be multiple second positioning slots 1134, with each second stator block 11221 corresponding to each second positioning slot 1134.

[0186] By adopting the above technical solution, the positions of the first stator block 11211 and the second stator block 11221 are effectively limited, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0187] In some embodiments of the present application, the first stator block 11211 is bonded into the first positioning groove 1133 .

[0188] As an example, adhesive can be first applied to the end of the first stator block 11211 facing the partition 113 and / or the slot wall of the first positioning groove 1133, and then the first stator block 11211 can be inserted into the first positioning groove 1133 so that the end of the first stator block 11211 facing the partition 113 is bonded to the slot wall of the first positioning groove 1133 by the adhesive.

[0189] As an example, an adhesive film can be first attached to the end of the first stator block 11211 facing the partition 113 and / or the slot wall of the first positioning groove 1133, and then the first stator block 11211 can be inserted into the first positioning groove 1133 so that the end of the first stator block 11211 facing the partition 113 is bonded to the slot wall of the first positioning groove 1133 through the adhesive film.

[0190] As an example, the first stator block 11211 can be inserted into the first positioning groove 1133, and then adhesive can be injected into the first positioning groove 1133 so that the end of the first stator block 11211 facing the partition 113 is bonded to the groove wall of the first positioning groove 1133 through the adhesive.

[0191] In some other embodiments of the present application, the second stator block 11221 is bonded into the second positioning groove 1134 .

[0192] As an example, adhesive can be first applied to the end of the second stator block 11221 facing the partition 113 and / or the slot wall of the second positioning groove 1134, and then the second stator block 11221 can be inserted into the second positioning groove 1134 so that the end of the second stator block 11221 facing the partition 113 is bonded to the slot wall of the second positioning groove 1134 by the adhesive.

[0193] As an example, an adhesive film can be first attached to the end of the second stator block 11221 facing the partition 113 and / or the wall of the second positioning groove 1134, and then the second stator block 11221 can be inserted into the second positioning groove 1134 so that the end of the second stator block 11221 facing the partition 113 is bonded to the wall of the second positioning groove 1134 through the adhesive film.

[0194] As an example, the second stator block 11221 can be first inserted into the second positioning groove 1134, and then adhesive can be injected into the second positioning groove 1134 so that the end of the second stator block 11221 facing the partition 113 is bonded to the groove wall of the second positioning groove 1134 through the adhesive.

[0195] In some other embodiments of the present application, the first stator block 11211 is bonded into the first positioning groove 1133 , and the second stator block 11221 is bonded into the second positioning groove 1134 .

[0196] By adopting the above technical solution, the positions of the first stator block 11211 and the second stator block 11221 can be more effectively limited, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0197] In some embodiments of this application, please refer to Figure 9 and Figure 15 The first positioning groove 1133 and the second positioning groove 1134 are connected to each other along the axial direction of the stator 11 , so that the first stator block 11211 can pass through the first positioning groove 1133 and abut against the second stator block 11221 .

[0198] It can be understood that the first positioning groove 1133 and the second positioning groove 1134 are connected to each other along the axial direction of the stator 11 to form a positioning space, and the first stator block 11211 is inserted into the positioning space from the side of the partition 113 facing the first cavity 11151, and the second stator block 11221 is inserted into the positioning space from the side of the partition 113 facing the second cavity 11152, and the end of the first stator block 11211 facing the second stator block 11221 and the end of the second stator block 11221 facing the first stator block 11211 are abutted against each other in the positioning space. It should be noted that the end of the first stator block 11211 facing the second stator block 11221 and the end of the second stator block 11221 facing the first stator block 11211 are in abutment with each other, which means that along the axial direction of the stator 11, the end of the first stator block 11211 facing the second stator block 11221 and the end of the second stator block 11221 facing the first stator block 11211 can be in direct contact or indirect contact, so that the first stator block 11211 and the second stator block 11221 cannot move toward each other along the axial direction of the stator 11.

[0199] By adopting the above technical solution, not only can the relative positions of the first stator block 11211 and the second stator block 11221 be effectively limited, but also the integrity of the stator body 112 is effectively improved, and the vibration of the stator body 112 during operation is improved, thereby further improving the working performance of the motor 10.

[0200] In some embodiments of this application, please refer to Figure 6 、 Figure 8 and Figure 9 The stator case 111 includes an outer frame 1111, an inner frame 1112, a first cover plate 1113 and a second cover plate 1114. The inner frame 1112 is arranged in the outer frame 1111 and coaxially with the outer frame 1111. The partition 113 is connected between the outer frame 1111 and the inner frame 1112. The first cover plate 1113 is covered between the outer frame 1111 and the inner frame 1112 and is located on one side of the outer frame 1111 along the axial direction of the stator 11. The second cover plate 1114 is covered between the outer frame 1111 and the inner frame 1112 and is located on the other side of the outer frame 1111 along the axial direction of the stator 11. The first stator block 11211 is fixedly connected to the first cover plate 1113, and the second stator block 11221 is fixedly connected to the second cover plate 1114.

[0201] The outer frame 1111 constitutes the outer peripheral wall of the stator case 111 , the inner frame 1112 constitutes the inner peripheral wall of the stator case 111 , the first cover plate 1113 constitutes one end wall of the stator case 111 , and the second cover plate 1114 constitutes the other end wall of the stator case 111 .

[0202] In some embodiments, the outer frame 1111 and the inner frame 1112 are both annular structures. The inner frame 1112 is arranged in the inner ring space of the outer frame 1111 and is coaxially arranged with the outer frame 1111. The rotating shaft of the motor 10 is passed through the inner ring space of the inner frame 1112.

[0203] In some embodiments, the first cover plate 1113 and the second cover plate 1114 are both sealedly connected between the outer frame 1111 and the inner frame 1112 to isolate the above-mentioned cavity 1115 from the external environment of the stator case 111. As an example, the first cover plate 1113 is welded or bonded between the outer frame 1111 and the inner frame 1112. As an example, the first cover plate 1113 is connected between the outer frame 1111 and the inner frame 1112 using fasteners such as bolts or rivets, and seals are provided at the connection between the first cover plate 1113 and the outer frame 1111 and at the connection between the first cover plate 1113 and the inner frame 1112. As an example, the second cover plate 1114 is welded or bonded between the outer frame 1111 and the inner frame 1112. As an example, the second cover plate 1114 is connected between the outer frame 1111 and the inner frame 1112 by fasteners such as bolts and rivets, and seals are provided at the connection between the second cover plate 1114 and the outer frame 1111 and at the connection between the second cover plate 1114 and the inner frame 1112.

[0204] By adopting the above technical solution, the stator body 112 is not only fixedly mounted on the separator 113, but also fixedly connected to the first cover plate 1113 and the second cover plate 1114, which can not only further improve the installation stability of the stator body 112, but also during the operation of the motor 10, the torque borne by the stator body 112 can not only be transmitted to the outer frame 1111 and the inner frame 1112 through the first cover plate 1113 and the second cover plate 1114, but also can be transmitted to the outer frame 1111 and the inner frame 1112 through the separator 113, so as to reduce the strength requirements of the first cover plate 1113 and the second cover plate 1114, reduce the thickness of the first cover plate 1113 and the second cover plate 1114, thereby reducing the air gap of the motor 10 and further improving the working performance of the motor 10.

[0205] In some embodiments of this application, please refer to Figure 9 The first stator block 11211 includes a first iron core and a first insulating sleeve 11212 sleeved on the first iron core, and the first insulating sleeve 11212 is fixedly connected to the first cover plate 1113. The second stator block 11221 includes a second iron core and a second insulating sleeve 11222 sleeved on the second iron core, and the second insulating sleeve 11222 is fixedly connected to the second cover plate 1114.

[0206] The first iron core and the second iron core are components for conducting a magnetic field. The first insulating sleeve 11212 is a component for insulating and separating the first winding from the first iron core, and the second insulating sleeve 11222 is a component for insulating and separating the second winding from the second iron core. Specifically, the first insulating sleeve 11212 is mounted on the first iron core, and the first winding is wound around the outer circumferential wall of the first insulating sleeve 11212. The second insulating sleeve 11222 is mounted on the second iron core, and the second winding is wound around the outer circumferential wall of the second insulating sleeve 11222. The first insulating sleeve 11212 is fixedly connected to the first cover plate 1113, and the second is fixedly connected to the second cover plate 1114, so that the stator body 112 is fixedly connected between the first cover plate 1113 and the second cover plate 1114.

[0207] In some embodiments, the first insulating sleeve 11212 is fixed relative to the first core, and the second insulating sleeve 11222 is fixed relative to the second core. As an example, the first insulating sleeve 11212 is fixedly connected to the first core, and the second insulating sleeve 11222 is fixedly connected to the second core. For example, the first insulating sleeve 11212 is bonded to the first core, and the second insulating sleeve 11222 is bonded to the second core. As an example, a limiting structure is provided between the first insulating sleeve 11212 and the first core to limit the relative position of the first insulating sleeve 11212 and the first core along the axis of the stator 11, and a limiting structure is provided between the second insulating sleeve 11222 and the second core to limit the relative position of the second insulating sleeve 11222 and the second core along the axis of the stator 11.

[0208] In some embodiments, the first positioning groove 1133 and the second positioning groove 1134 are connected to each other along the axial direction of the stator 11, and a limiting boss is provided at the connection point between the first positioning groove 1133 and the second positioning groove 1134. One end of the first iron core facing away from the first cover plate 1113 protrudes from the first insulating sleeve 11212, and one end of the second iron core facing away from the second cover plate 1114 protrudes from the second insulating sleeve 11222. One end of the first iron core facing away from the first cover plate 1113 and one end of the second iron core facing away from the second cover plate 1114 pass through the limiting boss and abut against each other. One end of the first insulating sleeve 11212 facing away from the first cover plate 1113 abuts against the side of the limiting boss facing the first cover plate 1113, and one end of the second insulating sleeve 11222 facing away from the second cover plate 1114 abuts against the side of the limiting boss facing the second cover plate 1114.

[0209] By adopting the above technical solution, it is convenient to fix the stator body 112 between the first cover plate 1113 and the second cover plate 1114 .

[0210] In some embodiments of the present application, the first insulating sleeve 11212 is welded to the first cover plate 1113 .

[0211] In some other embodiments of the present application, the second insulating sleeve 11222 is welded to the second cover plate 1114 .

[0212] In some other embodiments of the present application, the first insulating sleeve 11212 is welded to the first cover plate 1113 , and the second insulating sleeve 11222 is welded to the second cover plate 1114 .

[0213] During the assembly process of the stator 11, the stator body 112 can be first fixedly installed on the partition 113, and then the first cover plate 1113 and the second cover plate 1114 are respectively covered between the outer frame 1111 and the inner frame 1112, and then the first insulating sleeve 11212 is welded to the first cover plate 1113 and the second insulating sleeve 11222 is welded to the second cover plate 1114 using a penetration welding process.

[0214] In some embodiments, the material of the first insulating sleeve 11212, the material of the second insulating sleeve 11222, the material of the first cover plate 1113 and the material of the second cover plate 1114 are the same and are all plastic, so as to improve the welding strength between the first insulating sleeve 11212 and the first cover plate 1113 and the second insulating sleeve 11222 and the second cover plate 1114.

[0215] In some further embodiments of the present application, the first insulating sleeve 11212 is bonded to the first cover plate 1113 .

[0216] In some further embodiments of the present application, the second insulating sleeve 11222 is bonded to the second cover plate 1114 .

[0217] In some further embodiments of the present application, the first insulating sleeve 11212 is bonded to the first cover plate 1113 , and the second insulating sleeve 11222 is bonded to the second cover plate 1114 .

[0218] By adopting the above technical solution, it is convenient to fix the first stator block 11211 with the first cover plate 1113 and to fix the second stator block 11221 with the second cover plate 1114 .

[0219] In some embodiments of this application, please refer to Figure 9 The first insulating sleeve 11212 includes a first insulating body 11213 sleeved on the first iron core and a first connecting boss 11214 connected to the first insulating body 11213. The first connecting boss 11214 protrudes from the first insulating body 11213 along the axial direction of the stator 11 and is fixedly connected to the first cover plate 1113.

[0220] The first insulating body 11213 is the main portion of the first insulating sleeve 11212. It is sleeved onto the first core, and the first winding is wound around the outer circumference of the first insulating body 11213. The first connecting boss 11214 is used to connect to the first cover plate 1113. The first connecting boss 11214 protrudes from the first insulating body 11213 along the axis of the stator 11. This means that the first connecting boss 11214 protrudes from the first insulating body 11213 toward the first cover plate 1113.

[0221] In some embodiments, the first insulating body 11213 and the first cover plate 1113 are welded together via the first connection boss 11214. Specifically, the first cover plate 1113 is placed between the outer frame 1111 and the inner frame 1112, and the first connection boss 11214 is heated and melted using a penetration welding process, so that the first insulating body 11213 and the first cover plate 1113 are welded together via the first connection boss 11214.

[0222] In other embodiments, the first insulating body 11213 and the first cover plate 1113 are bonded together via the first connection boss 11214. Specifically, an adhesive may be applied to the first connection boss 11214, and then the first cover plate 1113 may be positioned between the outer frame 1111 and the inner frame 1112, so that the first connection boss 11214 and the first cover plate 1113 are bonded together via the adhesive.

[0223] By adopting the above technical solution, the connection strength between the first stator block 11211 and the first cover plate 1113 is effectively improved, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0224] In other embodiments of this application, please refer to Figure 9 The second insulating sleeve 11222 includes a second insulating body 11223 sleeved on the second iron core and a second connecting boss 11224 connected to the second insulating body 11223. The second connecting boss 11224 protrudes from the second insulating body 11223 along the axial direction of the stator 11 and is fixedly connected to the second cover plate 1114.

[0225] The second insulating body 11223 is the main portion of the second insulating sleeve 11222. It is sleeved onto the second core, and the second winding is wound around the outer circumference of the second insulating body 11223. The second connecting boss 11224 is used to connect to the second cover plate 1114. The second connecting boss 11224 protrudes from the second insulating body 11223 along the axis of the stator 11. This means that the second connecting boss 11224 protrudes from the second insulating body 11223 toward the second cover plate 1114.

[0226] In some embodiments, the second insulating body 11223 and the second cover plate 1114 are welded together via the second connection boss 11224. Specifically, the second cover plate 1114 is placed between the outer frame 1111 and the inner frame 1112, and the second connection boss 11224 is heated and melted using a penetration welding process, so that the second insulating body 11223 and the second cover plate 1114 are welded together via the second connection boss 11224.

[0227] In other embodiments, the second insulating body 11223 and the second cover plate 1114 are bonded together via the second connection boss 11224. Specifically, an adhesive may be applied to the second connection boss 11224, and then the second cover plate 1114 may be positioned between the outer frame 1111 and the inner frame 1112, so that the second connection boss 11224 and the second cover plate 1114 are bonded together via the adhesive.

[0228] By adopting the above technical solution, the connection strength between the second stator block 11221 and the second cover plate 1114 is effectively improved, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0229] In some other embodiments of this application, please refer to Figure 9 The first insulating sleeve 11212 includes a first insulating body 11213 sleeved on the first iron core and a first connecting boss 11214 connected to the first insulating body 11213. The first connecting boss 11214 protrudes from the first insulating body 11213 along the axial direction of the stator 11 and is fixedly connected to the first cover plate 1113. The second insulating sleeve 11222 includes a second insulating body 11223 sleeved on the second iron core and a second connecting boss 11224 connected to the second insulating body 11223. The second connecting boss 11224 protrudes from the second insulating body 11223 along the axial direction of the stator 11 and is fixedly connected to the second cover plate 1114.

[0230] By adopting the above technical solution, the connection strength between the first stator block 11211 and the first cover plate 1113 and the connection strength between the second stator block 11221 and the second cover plate 1114 are effectively improved, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0231] In some embodiments of this application, please refer to Figure 14 The inner circumferential wall of the stator housing 111 is provided with a positioning portion 11111 , and the positioning portion 11111 is embedded with the partition 113 .

[0232] The positioning portion 11111 is a portion for limiting the relative positions of the stator case 111 and the partition 113 along the circumferential direction and / or the axial direction of the stator 11 .

[0233] In some embodiments, the positioning portion 11111 is a protruding structure, that is, the positioning portion 11111 is protruding relative to the inner circumferential wall of the stator shell 111. Accordingly, a recess is provided on the partition 113. For example, a recess is provided on the outer circumferential wall of the above-mentioned connecting portion 1135, and the positioning portion 11111 is embedded in the recess of the partition 113.

[0234] In other embodiments, the positioning portion 11111 is a recessed structure, that is, the positioning portion 11111 is recessed on the inner circumferential wall of the stator shell 111. Accordingly, a convex portion is provided on the partition 113. For example, a convex portion is provided on the outer circumferential wall of the above-mentioned connecting portion 1135, and the convex portion is embedded in the positioning portion 11111.

[0235] In some other embodiments, there are multiple positioning portions 11111, some of the positioning portions 11111 are convex structures, and other positioning portions 11111 are concave structures. Accordingly, the partition 113 is provided with convex portions and concave portions. For example, the outer peripheral wall of the above-mentioned connecting portion 1135 is provided with convex portions and concave portions, and the positioning portion 11111 with a convex structure is embedded in the concave portion of the partition 113, and the convex portion of the partition 113 is embedded in the positioning portion 11111 with a concave structure.

[0236] By adopting the above technical solution, the relative position of the partition 113 and the stator housing 111 is effectively limited, and the connection strength between the partition 113 and the stator housing 111 is improved, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0237] In some embodiments of this application, please refer to Figure 14 There are multiple positioning portions 11111 , and the multiple positioning portions 11111 are evenly distributed along the circumference of the stator case 111 .

[0238] The multiple positioning portions 11111 are evenly distributed along the circumference of the stator case 111 , which means that along the circumference of the stator case 111 , the intervals between any two adjacent positioning portions 11111 are equal.

[0239] By adopting the above technical solution, the force on the separator 113 along the circumference of the stator shell 111 can be made more uniform, further improving the connection strength between the separator 113 and the stator shell 111, thereby further improving the installation stability of the stator body 112 and further improving the working performance of the motor 10.

[0240] In some embodiments of the present application, the partition 113 is an injection molded part.

[0241] In some embodiments, an injection hole is provided on the stator case 111, and a forming mold can be set in the cavity 1115 of the stator case 111, and then slurry is injected into the injection hole. The slurry enters the forming cavity of the forming mold through the injection hole. After the slurry solidifies, the mold is demolded to form a partition 113 in the stator case 111 and the partition 113 is fixedly connected to the stator case 111.

[0242] As an example, when the positioning portion 11111 is a protruding structure, during the molding process of the partition 113 , the slurry can cover the positioning portion 11111 , and after the slurry solidifies to form the partition 113 , the positioning portion 11111 is embedded in the partition 113 .

[0243] As an example, when the positioning portion 11111 is a concave structure, during the molding process of the partition 113, the slurry can enter the positioning portion 11111. After the slurry solidifies to form the partition 113, part of the partition 113 is embedded in the positioning portion 11111.

[0244] By adopting the above technical solution, it is convenient to form the separator 113 in the stator housing 111 , which effectively simplifies the production process of the stator 11 and improves the production efficiency of the stator 11 .

[0245] Second, see Figure 4 An embodiment of the present application provides a motor 10 , comprising a housing 12 and a stator 11 as described in any one of the above embodiments, wherein the stator 11 is accommodated in the housing 12 .

[0246] The motor 10 provided in the embodiment of the present application effectively improves the working performance of the motor 10 by adopting the stator 11 of any of the above embodiments.

[0247] In some embodiments of this application, please refer to Figure 4 The motor 10 further includes a first rotor 13 and a second rotor 14 . The first rotor 13 and the second rotor 14 are both accommodated in the housing 12 . The first rotor 13 and the second rotor 14 are respectively arranged on opposite sides of the stator 11 along the axial direction.

[0248] The first rotor 13 and the second rotor 14 are both rotating parts of the motor 10 .

[0249] In some embodiments, see Figure 4The motor 10 further includes a rotating shaft, with the first rotor 13 and the second rotor 14 both coaxially connected to the rotating shaft, and the rotating shaft passing through the stator 11. As an example, a first axial hole is defined in the middle of the separator 113, a second axial hole is defined in the middle of the first cover plate 1113, and a third axial hole is defined in the middle of the second cover plate 1114. The inner frame 1112 passes through the first axial hole and is connected to the hole wall of the first axial hole. One end of the inner frame 1112 is connected to the second axial hole, and the other end of the inner frame 1112 is connected to the third axial hole. The rotating shaft passes through the inner annular space of the inner frame 1112.

[0250] In some embodiments, the cooling medium flows from the cavity 1115 into the separation space between the housing 12 and the stator 11 via the cooling outlet 1117. The first rotor 13 includes a first rotor body 131 and a first rotor shell 132. The first rotor shell 132 is sealed to one end of the stator housing 111 to define a first rotor cavity 133. The second rotor 14 includes a second rotor body 141 and a second rotor shell 142. The second rotor shell 142 is sealed to the other end of the stator housing 111 to define a second rotor cavity 143. The first rotor body 131 is accommodated in the first rotor cavity 133, and the second rotor body 141 is accommodated in the second rotor cavity 143 to block the cooling medium. As an example, a power pump can also be provided in the separation space between the housing 12 and the stator 11 to provide flow power for the cooling medium.

[0251] By adopting the above technical solution, the above motor 10 can be configured as a dual-rotor motor 10 , thereby effectively improving the working performance of the dual-rotor motor 10 .

[0252] Thirdly, please refer to Figure 3 , an embodiment of the present application provides an electric drive device 1, comprising the motor 10 described in any of the above embodiments.

[0253] The electric drive device 1 provided in the embodiment of the present application effectively improves the working performance of the electric drive device 1 because it adopts the motor 10 described in any of the above embodiments.

[0254] For the fourth aspect, please refer to Figure 1 An embodiment of the present application provides an electric drive system, including a battery 2 and the above-mentioned electric drive device 1, where the battery 2 is electrically connected to the motor 10.

[0255] The electric drive system provided in the embodiment of the present application effectively improves the working performance of the electric drive system due to the adoption of the above-mentioned electric drive device 1.

[0256] Fifth, please refer to Figure 1 , an embodiment of the present application provides an electric device, including the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0257] The electric device provided in the embodiment of the present application effectively improves the working performance of the electric device due to the adoption of the above-mentioned electric drive device 1 or the above-mentioned electric drive system.

[0258] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A stator, characterized in that: The stator comprises: A stator housing having a cavity; a partition, fixedly disposed in the cavity and dividing the cavity into a first cavity and a second cavity, wherein the first cavity and the second cavity are both used to accommodate a cooling medium; The stator body includes a first stator assembly and a second stator assembly. The first stator assembly is fixed in the first cavity, and the second stator assembly is fixed in the second cavity. At least part of the first stator assembly and at least part of the second stator assembly are immersed in the cooling medium.

2. The stator according to claim 1, characterized in that The stator housing is provided with a cooling inlet and a cooling outlet, both of which are connected to the cavity, so that the cooling medium can flow into the cavity through the cooling inlet or flow out of the cavity through the cooling outlet.

3. The stator according to claim 2, characterized in that The separator is provided with a first through hole, and the first through hole is used to connect the first cavity and the second cavity.

4. The stator according to claim 3, characterized in that The cooling inlet and the cooling outlet are respectively arranged on two opposite sides of the stator housing along the radial direction of the stator.

5. The stator according to claim 4, characterized in that The cooling inlet and the cooling outlet are both directly connected to the first cavity. The stator further includes a first blocking member disposed in the first cavity.

6. The stator according to claim 5, characterized in that The stator further includes a second blocking member, which is disposed in the first cavity and located on the inner circumference of the first stator assembly. The first blocking member is located on the outer circumference of the first stator assembly.

7. The stator according to claim 4, characterized in that There are multiple cooling inlets, at least one of which is directly connected to the first cavity, and at least another one of which is directly connected to the second cavity.

8. The stator according to claim 7, characterized in that The cooling outlet is arranged opposite to the first through hole.

9. The stator according to claim 3, wherein: The cooling inlet is directly connected to the first cavity, and the cooling outlet is directly connected to the second cavity.

10. The stator according to claim 9, characterized in that The cooling inlet and the cooling outlet are both provided at the top of the stator housing; or, The cooling inlet is arranged at the bottom of the stator housing, and the cooling outlet is arranged at the top of the stator housing.

11. The stator according to claim 3, wherein: The separator is further provided with a second through hole, wherein the first through hole is located on the outer circumference side of the stator body, and the second through hole is located on the inner circumference side of the stator body.

12. The stator according to claim 2, wherein: The number of the cooling inlets and the number of the cooling outlets are both multiple, at least one cooling inlet is directly connected to the first cavity, at least another cooling inlet is directly connected to the second cavity, at least one cooling outlet is directly connected to the first cavity, and at least another cooling outlet is directly connected to the second cavity.

13. The stator according to claim 12, wherein: The cooling inlet and the cooling outlet are respectively arranged on two opposite sides of the stator housing along the radial direction of the stator.

14. The stator according to claim 2, wherein: The stator further includes a three-phase line electrically connected to the stator body, and the three-phase line extends from the stator body to the outside of the cavity through the cooling outlet or the cooling inlet.

15. The stator according to any one of claims 1 to 14, characterized in that The first stator assembly includes a first stator block and a first winding, the first stator block is fixed on the separator, and the first winding is wound on the first stator block. The second stator assembly includes a second stator block and a second winding, the second stator block is fixed on the separator, and the second winding is wound on the second stator block.

16. The stator according to claim 15, characterized in that A first positioning groove is formed on a side of the separator facing the first stator assembly, and the first stator block is inserted into the first positioning groove. A second positioning groove is formed on a side of the separator facing the second stator assembly, and the second stator block is inserted into the second positioning groove.

17. The stator according to claim 16, wherein: The first stator block is bonded into the first positioning groove; and / or, The second stator block is bonded into the second positioning groove.

18. The stator according to claim 16, wherein: The first positioning groove and the second positioning groove are communicated with each other along the axial direction of the stator, so that the first stator block can pass through the first positioning groove and abut against the second stator block.

19. The stator according to claim 15, wherein: The stator case includes an outer frame, an inner frame, a first cover plate and a second cover plate. The inner frame is arranged in the outer frame and coaxially with the outer frame. The partition is connected between the outer frame and the inner frame. The first cover plate is arranged between the outer frame and the inner frame and is located on one side of the outer frame along the axial direction of the stator. The second cover plate is arranged between the outer frame and the inner frame and is located on the other side of the outer frame along the axial direction of the stator. The first stator block is fixedly connected to the first cover plate, and the second stator block is fixedly connected to the second cover plate.

20. The stator according to claim 19, wherein: The first stator block includes a first iron core and a first insulating sleeve sleeved on the first iron core, and the first insulating sleeve is fixedly connected to the first cover plate. The second stator block includes a second iron core and a second insulating sleeve sleeved on the second iron core, and the second insulating sleeve is fixedly connected to the second cover plate.

21. The stator according to claim 20, characterized in that The first insulating sleeve is welded or bonded to the first cover plate; and / or, The second insulating sleeve is welded or bonded to the second cover plate.

22. The stator according to claim 20, wherein: The first insulating sleeve includes a first insulating body sleeved on the first iron core and a first connecting boss connected to the first insulating body, wherein the first connecting boss protrudes from the first insulating body along the axial direction of the stator and is fixedly connected to the first cover plate; and / or, The second insulating sleeve includes a second insulating body sleeved on the second iron core and a second connecting boss connected to the second insulating body. The second connecting boss protrudes from the second insulating body along the axial direction of the stator and is fixedly connected to the second cover plate.

23. The stator according to any one of claims 1 to 14, characterized in that The inner peripheral wall of the stator shell is provided with a positioning portion, and the positioning portion is embedded with the partition.

24. The stator according to claim 23, characterized in that There are multiple positioning portions, and the multiple positioning portions are evenly distributed along the circumference of the stator shell.

25. The stator according to any one of claims 1 to 14, characterized in that The separator is an injection molded part.

26. A motor, characterized in that: The motor comprises a housing and the stator according to any one of claims 1 to 25, wherein the stator is accommodated in the housing.

27. The motor according to claim 26, wherein The motor further includes a first rotor and a second rotor. The first rotor and the second rotor are both accommodated in the housing. The first rotor and the second rotor are respectively arranged on opposite sides of the stator along the axial direction.

28. An electric drive device, characterized in that: The electric drive device comprises the electric motor according to claim 26 or 27.

29. An electric drive system, characterized in that: The electric drive system includes a battery and the electric drive device according to claim 28, wherein the battery is electrically connected to the motor.

30. An electric device, characterized in that: The electric device includes the electric drive apparatus according to claim 28 or the electric drive system according to claim 29 .

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