Motor and electric device

Abstract

The invention relates to a motor and an electric device, and the motor comprises a stator assembly, the stator assembly comprises a winding assembly, a plugging assembly and an interface part, part of the plugging assembly is located in an interface cavity of the interface part, and at least part of the interface part is located at the inner side of the winding assembly in the radial direction of the winding assembly; in the stator assembly, at least part of the interface part and the winding assembly are overlapped along the axial direction of the winding assembly, so that the structures of the interface part and the winding assembly are more compact along the axial direction and the radial direction of the winding assembly, the internal space of the winding assembly is fully utilized by the interface part, and the size of the stator assembly is further reduced.

Description

Technical Field

[0001] This invention relates to thermal management technology, and more specifically to an electric motor and an electric device. Background Technology

[0002] The related motors and electric actuators include: stators and busbar assemblies, stator electrical connections to busbar assemblies, and how to reduce the size of motors and electric actuators is a technical problem. Summary of the Invention

[0003] The inventors have discovered that in related technologies, the interface of the busbar assembly is located on the axial or radial outer side of the stator. This interface additionally occupies space on the axial or radial outer side of the stator, resulting in a larger motor size. The purpose of this application is to provide a motor and electric actuator that facilitates a reduction in size.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] An electric motor includes a stator assembly, the stator assembly including a winding assembly, a connector assembly and an interface portion, the winding assembly being electrically connected to the connector assembly, a portion of the connector assembly being located in an interface cavity of the interface portion, at least a portion of the interface portion being located inside the winding assembly along the radial direction of the winding assembly, and at least a portion of the interface portion and the winding assembly overlapping each other along the axial direction of the winding assembly.

[0006] In the motor provided by this application, at least a portion of the interface portion is located inside the winding assembly along the radial direction of the winding assembly, and at least a portion of the interface portion overlaps with the winding assembly along the axial direction of the winding assembly. In this way, the structure of the interface portion and the winding assembly is more compact along both the axial and radial directions of the winding assembly, so that the interface portion makes full use of the internal space of the winding assembly, which is conducive to reducing the size of the motor.

[0007] An electric actuator includes a motor and a fluid assembly; the motor includes a stator assembly and a magnetic rotor, the stator assembly includes a winding assembly, a connector assembly, and an interface portion, the winding assembly is electrically connected to the connector assembly, a portion of the connector assembly is located in the interface cavity of the interface portion, and at least a portion of the interface portion is located inside the winding assembly along the radial direction of the winding assembly; at least a portion of the interface portion and the winding assembly overlap along the axial direction of the winding assembly; the fluid assembly includes an actuating component, the actuating component being an impeller or a valve core, the actuating component and the magnetic rotor being in a limiting engagement, and the actuating component and the magnetic rotor being rotatable relative to the stator assembly.

[0008] In the electric device provided in this application, at least a portion of the interface portion is located inside the winding assembly along the radial direction of the winding assembly, and at least a portion of the interface portion overlaps with the winding assembly along the axial direction of the winding assembly. In this way, the structure of the interface portion and the winding assembly is more compact along the axial and radial directions of the winding assembly, so that the interface portion makes full use of the internal space of the winding assembly, which is conducive to reducing the size of the electric device. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of an electric device according to an embodiment of this application;

[0010] Figure 2 yes Figure 1 A cross-sectional structural diagram of the electric actuator;

[0011] Figure 3 yes Figure 1 A three-dimensional structural diagram of the middle partition and stator assembly;

[0012] Figure 4 yes Figure 3 A three-dimensional structural diagram of the middle stator assembly;

[0013] Figure 5 yes Figure 2 A three-dimensional structural diagram of the intermediate winding assembly, stator core, and insulating frame;

[0014] Figure 6 yes Figure 2 A three-dimensional structural diagram of the first end cap;

[0015] Figure 7 yes Figure 2 A three-dimensional structural diagram of the middle cylinder;

[0016] Figure 8 yes Figure 4 A three-dimensional structural diagram of the grounding component and three connector components;

[0017] Figure 9 yes Figure 8 A three-dimensional structural diagram of the first connecting segment;

[0018] Figure 10 yes Figure 9 A three-dimensional structural diagram of the second connecting section;

[0019] 10-Electrical actuator, 100-Stator assembly, 200-Fluid assembly, 110-Winding assembly, 120-Connection assembly, 130-Stator housing, 140-Grounding assembly, 150-Stator core, 160-Insulating frame, 210-Magnetic rotor, 220-Actuating component, 230-Pump housing, 111-Winding, 112-Center hole, 1111-Coil section, 1112-Tap section, 151-Core, 152-Base, 121-First pin, 122-First connecting section, 123-Second pin 1221-First receiving part, 1222-Second receiving part, 131-Cylinder body, 132-First end cap, 1321-Interface part, 1321a-Interface cavity, 1321b-Bottom wall part, 1321c-Peripheral wall part, 1321d-Limiting hole, 1311-Large diameter section, 1312-Small diameter section, 1313-Limiting part, 141-First grounding pin, 142-Second connecting section, 143-Second grounding pin, 1421-Third receiving part, 1422-Fourth receiving part, 231-Separation part. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0021] In related technologies, motors include stators and busbar assemblies. The stator is electrically connected to the busbar assemblies, and how to reduce the size of the stator assembly is a technical problem.

[0022] The inventors discovered that in related technologies, the interface of the busbar assembly is located on the axial or radial outer side of the stator. This interface occupies additional space on the axial or radial outer side of the stator, which causes the motor to be larger in size.

[0023] Furthermore, this interface can be electrically coupled to the wiring harness of the thermal management device, and the wiring harness can be electrically coupled to the controller of the thermal management device. The controller can be electrically connected to multiple interfaces through the wiring harness, which is conducive to the integrated control of the thermal management device. The motor can be, but is not limited to, part of an electric pump or electric valve. The interface is very prominent on the motor of the electric pump or electric valve, which is not conducive to reducing the size of the electric pump or electric valve, and thus not conducive to reducing the size of the thermal management device.

[0024] Based on the above-mentioned technical problems, embodiments of the present invention provide an electric motor, including a stator assembly 100. The stator assembly 100 includes a winding assembly 110, a connector assembly 120, and an interface portion 1321. The winding assembly 110 is electrically connected to the connector assembly 120. A portion of the connector assembly 120 is located in the interface cavity 1321a of the interface portion 1321. Along the radial direction of the winding assembly 110, at least a portion of the interface portion 1321 is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, at least a portion of the interface portion 1321 and the winding assembly 110 overlap.

[0025] In the motor provided in this embodiment of the invention, at least a portion of the interface portion 1321 is located inside the winding assembly 110 along the radial direction of the winding assembly 110, and at least a portion of the interface portion 1321 overlaps with the winding assembly 110 along the axial direction of the winding assembly 110. In this way, the structure of the interface portion 1321 and the winding assembly 110 is more compact along both the axial and radial directions of the winding assembly 110, so that the interface portion 1321 makes full use of the internal space of the winding assembly 110, reduces the problem of the interface portion 1321 protruding on the motor, and thus helps to reduce the size of the motor.

[0026] An embodiment of the present invention also provides an electric device 10, including a motor and a fluid assembly 200; the motor includes a stator assembly 100 and a magnetic rotor 210, the stator assembly 100 includes a winding assembly 110, a connector assembly 120 and an interface portion 1321, the winding assembly 110 is electrically connected to the connector assembly 120, a portion of the connector assembly 120 is located in the interface cavity 1321a of the interface portion 1321, at least a portion of the interface portion 1321 is located inside the winding assembly 110 along the radial direction of the winding assembly 110; at least a portion of the interface portion 1321 and the winding assembly 110 are overlapped along the axial direction of the winding assembly 110; the fluid assembly 200 includes an actuating component 220, the actuating component 220 being an impeller or a valve core, the actuating component 220 and the magnetic rotor 210 being mutually restrictive and rotatable relative to the stator assembly 100.

[0027] In the electric device 10 provided in this embodiment of the invention, at least a portion of the interface portion 1321 is located inside the winding assembly 110 along the radial direction of the winding assembly 110, and at least a portion of the interface portion 1321 overlaps with the winding assembly 110 along the axial direction of the winding assembly 110. In this way, the structure of the interface portion 1321 and the winding assembly 110 is more compact along both the axial and radial directions of the winding assembly 110, so that the interface portion 1321 makes full use of the internal space of the winding assembly 110, reduces the problem of the interface portion 1321 protruding on the electric device 10, and thus helps to reduce the size of the electric device 10.

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present application.

[0029] The following is combined Figures 1 to 10 This invention provides a detailed description of an electric motor, which includes a stator assembly 100 and a magnetic rotor 210.

[0030] In one possible implementation, the stator assembly 100 includes a winding assembly 110, a connector assembly 120, and an interface portion 1321. The winding assembly 110 is electrically connected to the connector assembly 120. A portion of the connector assembly 120 is located in the interface cavity 1321a of the interface portion 1321. Along the radial direction of the winding assembly 110, at least a portion of the interface portion 1321 is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, at least a portion of the interface portion 1321 and the winding assembly 110 overlap.

[0031] For ease of understanding, such as Figure 4 and Figure 5 As shown, the winding assembly 110 is generally cylindrical, with a portion of the interface 1321 located within it. Along the radial direction of the winding assembly 110, the interface 1321 is located radially inner to the winding assembly 110. The overlapping arrangement of the interface 1321 and the winding assembly 110 along the axial direction can be understood as follows: the interface 1321 is projected along one radial direction of the winding assembly 110 to form a projection surface, and this projection surface partially overlaps the winding assembly 110. Other overlapping arrangements mentioned in this embodiment are consistent with this principle and will not be specifically described further. Therefore, along both the axial and radial directions of the winding assembly 110, the structure of the interface 1321 and the winding assembly 110 is more compact, allowing the interface 1321 to fully utilize the internal space of the winding assembly 110, reducing the problem of the interface 1321 protruding from the motor, and thus facilitating a reduction in motor size.

[0032] In one possible implementation, the inner wall forming the interface cavity 1321a includes a bottom wall portion 1321b, and the connector assembly 120 and the bottom wall portion 1321b are mutually limiting and engaged. Along the radial direction of the winding assembly 110, the bottom wall portion 1321b is located inside the winding assembly 110; along the axial direction of the winding assembly 110, the bottom wall portion 1321b and the winding assembly 110 are overlapped.

[0033] For ease of understanding, such as Figure 2 and Figure 6 As shown, the bottom wall portion 1321b forms the bottom wall of the interface cavity 1321a, which can limit the depth of the wire harness insertion into the interface cavity 1321a. The end wall of one end of the wire harness can be matched with the bottom wall portion 1321b for limiting, and the bottom wall portion 1321b is completely located within the winding assembly 110. Along the radial direction of the winding assembly 110, the bottom wall portion 1321b is located inside the winding assembly 110; along the axial direction of the winding assembly 110, the bottom wall portion 1321b and the winding assembly 110 are overlapped, that is, the projection plane of the bottom wall portion 1321b along a radial direction of the winding assembly 110 overlaps with the winding assembly 110, making the structure of the bottom wall portion 1321b and the winding assembly 110 compact, which is more conducive to reducing the size of the motor. It should be noted that the limiting fit structure mentioned in this embodiment can be one component injection molded with another component as an insert, or it can be, but is not limited to, two components with an interference fit or a threaded fit, etc.

[0034] In one possible implementation, the inner wall forming the interface cavity 1321a includes a peripheral wall portion 1321c located inside the winding assembly 110 along the radial direction of the winding assembly 110; at least a portion of the peripheral wall portion 1321c overlaps with the winding assembly 110 along the axial direction of the winding assembly 110; the peripheral wall portion 1321c extends from the bottom wall portion 1321b toward the axial side of the winding assembly 110.

[0035] For ease of understanding, such as Figure 2 and Figure 6 As shown, the peripheral wall portion 1321c is the sidewall forming the interface cavity 1321a. The peripheral wall portion 1321c extends from the bottom wall portion 1321b towards the axial side of the winding assembly 110, which can define the direction of the wire harness insertion into the interface cavity 1321a. The outer sidewall of one end of the wire harness can be matched with the peripheral wall portion 1321c for limiting. Part of the peripheral wall portion 1321c is located inside the winding assembly 110. Along the radial direction of the winding assembly 110, the peripheral wall portion 1321c is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, part of the peripheral wall portion 1321c and the winding assembly 110 overlap, that is, the projection plane of the peripheral wall portion 1321c along a radial direction of the winding assembly 110 partially overlaps with the winding assembly 110, making the structure of the peripheral wall portion 1321c and the winding assembly 110 compact, which is more conducive to reducing the size of the motor.

[0036] In one possible implementation, the connector assembly 120 includes a first pin 121, at least a portion of which is located in the interface cavity 1321a. The first pin 121 and the interface portion 1321 are mutually constrained and engaged. Along the radial direction of the winding assembly 110, the first pin 121 is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, at least a portion of the first pin 121 overlaps with the winding assembly 110.

[0037] For ease of understanding, such as Figure 2 and Figure 8 As shown, the first pin 121 can electrically engage with the wire harness. The first pin 121 is generally needle-shaped to facilitate electrical engagement with common wire harnesses. The first pin 121 is limited to a bottom wall portion 1321b, which has a limiting hole 1321d. Part of the first pin 121 is located in the limiting hole 1321d. The outer wall of the first pin 121 and the inner wall forming the limiting hole 1321d are limited to engage, so that the wire harness can be limited to the interface portion 1321 and the first pin 121. Along the radial direction of the winding assembly 110, the first pin 121 is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, part of the first pin 121 overlaps with the winding assembly 110, that is, the projection plane of the first pin 121 along a radial direction of the winding assembly 110 partially overlaps with the winding assembly 110. The structure of the first pin 121 and the winding assembly 110 is compact, which is more conducive to reducing the size of the motor.

[0038] In one possible implementation, the connector assembly 120 includes a second pin 123 electrically connected to a first pin 121 and a winding assembly 110. The second pin 123 and the winding assembly 110 are mutually constrained. Along the radial direction of the winding assembly 110, the second pin 123 is located on the outer or inner side of the winding assembly 110. Along the axial direction of the winding assembly 110, at least a portion of the second pin 123 overlaps with the winding assembly 110.

[0039] For ease of understanding, such as Figure 4 and Figure 8 As shown, the second pin 123 is electrically coupled to the winding assembly 110 to facilitate the assembly of the connector assembly 120 and the winding assembly 110. Along the radial direction of the winding assembly 110, the second pin 123 is located on the outer side of the winding assembly 110. Along the axial direction of the winding assembly 110, a portion of the second pin 123 overlaps with the winding assembly 110; that is, the projection plane of the second pin 123 along a radial direction partially overlaps with the winding assembly 110. The compact structure of the second pin 123 and the winding assembly 110 is more conducive to reducing the size of the motor.

[0040] In one possible implementation, the connector assembly 120 includes a first connecting segment 122 electrically connected to a first pin 121, the first connecting segment 122 and the first pin 121 being an integral structure or a limiting fit; the first connecting segment 122 electrically connected to a second pin 123, the second connecting segment 142 and the second pin 123 being an integral structure or a limiting fit; at least a portion of the first connecting segment 122 is located inside the winding assembly 110 or the first connecting segment 122 is located on one axial side of the winding assembly 110.

[0041] For ease of understanding, such as Figure 4 As shown, the current on the wiring harness can be supplied to the winding assembly 110 through the first pin 121, the first connecting section 122, and the second pin 123. Considering the compact structure of the connector assembly 120 and the winding assembly 110, the first pin 121 and the first connecting section 122 are mutually limitingly engaged, and the first connecting section 122 and the second pin 123 are mutually limitingly engaged. The connector assembly 120 adopts a split structure, which facilitates the assembly of the connector assembly 120 and the winding assembly 110. The first connecting section 122 is basically located on one side of the axial direction of the winding assembly 110. The first connecting section 122 is either in contact with or has a gap from the end wall of the winding assembly 110, which is more conducive to reducing the size of the motor.

[0042] In one possible implementation, the magnetic rotor 210 is rotatable relative to the stator assembly 100. The magnetic rotor 210 and the winding assembly 110 are arranged sequentially along the axial direction of the winding assembly 110, with the magnetic rotor 210 located on one side of the axial direction of the winding assembly 110. The winding assembly 110 includes a coil segment 1111, and the axial direction of the winding assembly 110 is parallel to the axial direction of the coil segment 1111.

[0043] For ease of understanding, such as Figure 2 As shown, part of the interface portion 1321 is located on one axial side of the winding assembly 110. The interface cavity 1321a of the interface portion 1321 is open to the axial side of the winding assembly 110. The wire harness can be limited and engaged with the interface portion 1321 on one axial side of the winding assembly 110. The magnetic rotor 210 is located on the other axial side of the winding assembly 110 and can rotate on the other axial side of the winding assembly 110. This structural layout is more reasonable and more conducive to reducing the size of the motor. The coil segment 1111 is roughly tubular in shape, specifically a triangular tube shape. The axial direction of the coil segment 1111 is consistent with the axial direction of the winding assembly 110. When current passes through the coil segment 1111, the current can generate a changing magnetic field along the axial direction of the winding assembly 110, so as to drive the magnetic rotor 210 located on the other axial side of the winding assembly 110.

[0044] In one possible implementation, the stator assembly 100 includes a stator core 150, at least a portion of which is located inside the winding assembly 110 along the radial direction of the winding assembly 110; and at least a portion of which overlaps with the winding assembly 110 along the axial direction of the winding assembly 110, i.e., the stator core 150 at least partially overlaps the winding assembly 110 along a radial projection plane of the winding assembly 110.

[0045] The stator assembly 100 includes a grounding assembly 140 electrically connected to the stator core 150, and at least a portion of the grounding assembly 140 is located in the interface cavity 1321a.

[0046] For ease of understanding, such as Figure 4 and Figure 5 As shown, the winding assembly 110 includes six windings 111, namely two U-phase windings 111, two V-phase windings 111, and two W-phase windings 111. Each winding 111 includes twelve coil segments 1111, with each winding 111 comprising two coil segments 1111. The stator core 150 includes twelve cores 151, each corresponding to one of the twelve coil segments 1111. The cores 151 are approximately located within the coil segments 1111, and are generally cylindrical in shape. The coil segments 1111 are generally tubular in shape. The length direction of the cores 151 is substantially aligned with the axial direction of the coil segments 1111. This arrangement facilitates the cores 151 in guiding the magnetic field to the magnetic rotor 210. Along the radial direction of the winding assembly 110, the stator core 150 is located approximately inside the winding assembly 110. Along the axial direction of the winding assembly 110, the core 151 and the coil segment 1111 are arranged to overlap approximately. In this way, the structure of the stator core 150 and the winding assembly 110 is compact, which is more conducive to reducing the size of the motor.

[0047] Grounding assembly 140 is used to ground the stator core 150. A portion of grounding assembly 140 is located in interface cavity 1321a, where it is positioned and engaged with the interface portion 1321a. Along the radial direction of winding assembly 110, a portion of grounding assembly 140 is located inside winding assembly 110. Along the axial direction of winding assembly 110, a portion of grounding assembly 140 overlaps with winding assembly 110, meaning that the grounding assembly 140 partially overlaps the winding assembly 110 along a radial projection plane. This compact structure of grounding assembly 140 and winding assembly 110 is beneficial for reducing motor size. The partial location of grounding assembly 140 on the axial side of winding assembly 110 near connector assembly 120 further enhances structural compactness.

[0048] Embodiments of the present invention also provide a stator assembly 100, which is described below in conjunction with... Figures 1 to 10The stator assembly 100 will be described in detail below. The stator assembly 100 can be used as part of a motor or electric device 10. The stator assembly 100 includes a winding assembly 110, a connector assembly 120, an interface portion 1321, a grounding assembly 140, and a stator housing 130.

[0049] In one possible implementation, the winding assembly 110 is electrically connected to the connector assembly 120, and the winding assembly 110 and the interface portion 1321 are mutually constrained, with at least a portion of the interface portion 1321 located within the winding assembly 110.

[0050] For ease of understanding, such as Figure 2 As shown, part of the connector 120 is located in the interface cavity 1321a of the interface portion 1321. The winding assembly 110 is generally tubular in shape. The interface portion 1321 is generally located inside the winding assembly 110. The interface portion 1321 utilizes the internal space of the winding assembly 110, reducing the problem of the interface portion 1321 protruding on the stator assembly 100, which in turn helps to reduce the size of the stator assembly 100.

[0051] Along the radial direction of the winding assembly 110, the interface portion 1321 is located inside the winding assembly 110. Along the axial direction of the winding assembly 110, part of the interface portion 1321 overlaps with the winding assembly 110. In this way, the structure of the interface portion 1321 and the winding assembly 110 is more compact along both the axial and radial directions of the winding assembly 110. This allows the interface portion 1321 to make full use of the internal space of the winding assembly 110, reduces the problem of the interface portion 1321 protruding on the motor, and thus helps to reduce the size of the motor.

[0052] The winding assembly 110 has a center hole 112, which is coaxially arranged with the winding assembly 110. At least part of the interface portion 1321 is located in the center hole 112, and part of the connector assembly 120 is located in the center hole 112, which facilitates the assembly of the interface portion 1321 and the connector assembly 120.

[0053] In one possible implementation, the winding assembly 110 includes windings 111, with at least three windings 111, and at least three connector assemblies 120, with the at least three connector assemblies 120 electrically connecting the at least three windings 111.

[0054] For ease of understanding, such as Figure 4 and Figure 5As shown, at least three windings 111 are three-phase windings 111, and there are six windings 111. The six windings 111 form a winding assembly 110. The six windings 111 are two U-phase windings 111, two V-phase windings 111, and two W-phase windings 111. There are three connector assemblies 120. The three connector assemblies 120 are U-phase connector assemblies 120, V-phase connector assemblies 120, and W-phase connector assemblies 120. One U-phase connector assembly 120 electrically connects two U-phase windings 111, one V-phase connector assemblies 120 electrically connects two V-phase windings 111, and one W-phase connector assemblies 120 electrically connects two W-phase connector assemblies 120. This arrangement is beneficial to improving the driving performance of the stator assembly 100.

[0055] In one possible implementation, the winding 111 includes coil segments 1111, and there are at least three coil segments 1111.

[0056] For ease of understanding, such as Figure 5 As shown, there are twelve coil segments 1111. Each winding 111 includes two coil segments 1111. The two coil segments 1111 of each winding 111 can be wound from the same piece or the same set of enameled wire. The twelve coil segments 1111 are arranged sequentially around the axial direction of the central hole 112 in a circular arrangement, forming the central hole 112, which is approximately a circular hole. The coil segments 1111 are approximately tubular in shape, and the tubular shape includes, but is not limited to, at least one of triangular tubes, round tubes, and square tubes. According to the arrangement of coil segments 1111, the winding assembly 110 includes three different arrangement forms: In the first arrangement form, the axial direction of the coil segments 1111 is consistent with the axial direction of the central hole 112, the coil segments 1111 and the winding assembly 110 are coaxially arranged, and at least two coil segments 1111 are arranged sequentially along the axial direction of the central hole 112. This type of winding assembly 110 is also referred to as the stator of a stepper motor and can be used as part of an electric valve. The specific structure can be found in the electric valve of publication number "CN109424777A"; In the second arrangement form, the axial direction of the coil segments 1111 is perpendicular to the axial direction of the winding assembly 110, and at least two coil segments 1111 are arranged sequentially around the axial direction of the central hole 112. This type of winding assembly 110 is also referred to as the stator of a radial flux motor and can be used as part of an electric pump. The specific structure can be found in the electric pump of publication number "CN117674458A"; Figure 4 and Figure 5As shown, in the third arrangement of the winding assembly 110, the coil segment 1111 is roughly triangular in shape, the axis of the coil segment 1111 is parallel to the axis of the winding assembly 110, and at least two coil segments 1111 are arranged sequentially around the axis of the winding assembly 110. This type of winding assembly 110 is also called the winding assembly 110 of an axial flux motor, and can also be used as part of an electric pump.

[0057] like Figure 4 and Figure 5 As shown, the axial direction of the coil segment 1111 is parallel to the axial direction of the winding assembly 110. When the coil segment 1111 is energized, it can generate a changing magnetic field along the axial direction of the central hole 112. This changing magnetic field along the axial direction of the central hole 112 can drive the magnetic rotor 210 on the axial direction of the winding assembly 110. In this way, the magnetic rotor 210 does not need to be placed in the central hole 112, which is beneficial for the interface part 1321 and the connector assembly 120 to utilize the space of the central hole 112. Comparing axial flux motors and radial flux motors of the same size, the axial flux motor has higher driving performance, and its central hole 112 can be fully used to house the interface part 1321 and the connector assembly 120, which is more conducive to reducing the extra space occupied by the interface part 1321 and the connector assembly 120, and thus helps to reduce the size of the stator assembly 100 and the motor.

[0058] In one possible implementation, the connector assembly 120 includes a first pin 121, which is engaged with the interface portion 1321. At least a portion of the first pin 121 is located in the interface cavity 1321a. There are at least three first pins 121, and the length direction of the at least three first pins 121 is parallel to the axial direction of the winding assembly 110. Along the radial direction of the winding assembly 110, at least two of the first pins 121 are arranged sequentially. At least a portion of the at least three first pins 121 is located in the center hole 112 of the winding assembly 110.

[0059] For ease of understanding, such as Figure 4 and Figure 5 As shown, there are three first pins 121, which are arranged in a row. This makes the structure of the three first pins 121 more compact, which in turn helps to reduce the size of the stator assembly 100.

[0060] In one possible implementation, the stator assembly 100 includes a stator core 150, which includes core portions 151. There are at least three core portions 151, and the axial direction of the at least three core portions 151 is parallel to the axial direction of the winding assembly 110. The at least three core portions 151 are arranged sequentially around the axial direction of the winding assembly 110. The stator assembly 100 includes an insulating frame 160, which is at least three in number. The at least three insulating frames 160 limit and cooperate with the at least three core portions 151. The at least three insulating frames 160 are arranged sequentially around the axial direction of the winding assembly 110. At least three coil segments 1111 limit and cooperate with the at least three insulating frames 160.

[0061] For ease of understanding, such as Figure 5 As shown, there are twelve cores 151, each roughly in the shape of a triangular prism. The axial direction of each core 151 is its length. The twelve cores 151 are arranged sequentially around the axial direction of the winding assembly 110 in a circular arrangement. There are also twelve insulating frames 160, each roughly in the shape of a triangular tube. The axial direction of the insulating frames 160 is parallel to the axial direction of the central hole 112. The twelve insulating frames 160 are arranged sequentially around the axial direction of the central hole 112 in a circular arrangement. Each of the twelve insulating frames 160 corresponds to one of the twelve cores 151. The cores 151 are located within the insulating frames 160 that provide a limiting fit. The outer peripheral wall of the core 151 and the inner peripheral wall of the insulating frame 160 provide a limiting fit. The twelve insulating frames 160 correspond one-to-one with the twelve coil segments 1111. A portion of the insulating frame 160 is located within the coil segment 1111, which is in a limiting engagement with it. The enameled wire of the coil segment 1111 is in a taut state. The outer peripheral wall of the insulating frame 160 and the inner peripheral wall of the coil segment 1111 are in a limiting engagement. At least a portion of the core 151 is located within the coil segment 1111. The core 151 can improve the electromagnetic performance of the coil segment 1111. The coil segment 1111 is located away from the core 151 relative to the insulating frame 160, thus avoiding direct contact between the coil segment 1111 and the core 151. This improves the safety performance of the stator assembly 100.

[0062] In one possible implementation, the connector assembly 120 includes at least three second pins 123, and the winding 111 includes at least three tap segments 1112. The at least three second pins 123 are electrically connected to the at least three tap segments 1112, and the electrically connected second pins 123 and tap segments 1112 are mutually limitingly engaged. The at least three tap segments 1112 are electrically connected to at least three coil segments 1111. Along the radial direction of the winding assembly 110, the second pins 123 are located inside or outside the winding assembly 110, and the at least three second pins 123 are arranged sequentially around the axial direction of the central hole 112.

[0063] For ease of understanding, such as Figure 4 As shown, the winding assembly 110 is generally cylindrical. When the diameter of the central hole 112 is so small that its space is only allowed to accommodate the connector assembly 120 and the grounding assembly 140, the second pin 123 is generally located on the radial outer side of the winding assembly 110. Multiple second pins 123 are arranged sequentially around the axial direction of the central hole 112. The second pins 123 are close to the outer side of the coil segment 1111 that is electrically connected to them. The tap segment 1112 between the second pin 123 and the coil segment 1111 is relatively short. This is more conducive to improving the structural compactness of the second pins 123 and the winding assembly 110, and thus helps to reduce the size of the stator assembly 100.

[0064] When the diameter of the central hole 112 is large enough to accommodate the connector assembly 120, the grounding assembly 140, and the second pin 123, the second pin 123 is approximately located in the central hole 112. Multiple second pins 123 are arranged sequentially around the axial direction of the central hole 112. The second pin 123 is close to the inner side of the coil segment 1111 that is electrically connected to it. The tap segment 1112 between the second pin 123 and the coil segment 1111 is relatively short. This is beneficial to the structural compactness of the second pin 123 and the winding assembly 110, and thus helps to reduce the size of the stator assembly 100.

[0065] In one possible implementation, the connector assembly 120 includes at least three first connecting segments 122, at least three first pins 121 electrically connected to at least three first connecting segments 122, the electrically connected first pins 121 and the first connecting segments 122 being an integral structure or a limiting fit; at least three second pins 123 electrically connected to at least three first connecting segments 122, the electrically connected second pins 123 and the first connecting segments 122 being an integral structure or a limiting fit.

[0066] For ease of understanding, such as Figure 4 As shown, the first pin 121 and the second pin 123 are located at different positions. The first connecting segment 122 extends from the first pin 121 to the second pin 123, and the first pin 121 and the second pin 123 are electrically connected through the first connecting segment 122. The first pin 121 extends from the first connecting segment 122, which is electrically connected to it, to one side of the axial direction of the winding assembly 110. The second pin 123 extends from the first connecting segment 122, which is electrically connected to it, to one side of the axial direction of the winding assembly 110. The cross-section of the electrically connected first pin 121, the connecting segment, and the second pin 123 is approximately "U" shaped and is wrapped around the coil segment 1111. This is more conducive to improving the structural compactness of the connector assembly 120 and the winding assembly 110, and thus more conducive to reducing the size of the stator assembly 100.

[0067] The first pin 121 and the first connecting segment 122 are mutually limitingly engaged, and the second pin 123 and the first connecting segment 122 are also mutually limitingly engaged. The first pin 121, the second pin 123, and the first connecting segment 122 can be assembled separately, which improves the ease of assembly. The limiting engagement structure between the first pin 121 and the first connecting segment 122 is a plug-in structure, and the limiting engagement structure between the second pin 123 and the first connecting segment 122 is also a plug-in structure. The first connecting segment 122 has a first receiving portion 1221 and a second receiving portion 1222. Part of the first pin 121 is located inside the first receiving portion 1221, and the outer wall of the first pin 121 is mutually limitingly engaged with the inner wall of the first receiving portion 1221. Part of the second pin 123 is located in the second receiving portion 1222, and the outer wall of the second pin 123 is mutually limitingly engaged with the inner wall of the second receiving portion 1222.

[0068] Alternatively, the connector assembly 120 can also be a single piece, with the first pin 121, the first connecting section 122, and the second pin 123 forming a single unit. This reduces the number of parts and simplifies assembly. The single-piece first pin 121, first connecting section 122, and second pin 123 can be manufactured using a stamping process.

[0069] In one possible implementation, at least three connector components 120 limit the mating interface portion 1321, at least a portion of at least three first pins 121 are located within the interface portion 1321, and at least a portion of the interface portion 1321 is located in the center hole 112; at least one of the first pins 121, the first connecting segment 122, and the second pins 123 is the mating interface portion 1321.

[0070] For ease of understanding, such as Figure 2 As shown, a portion of the three first pins 121 is located within the interface portion 1321. When the wiring harness of the thermal management device is electrically engaged with the three first pins 121, the wiring harness also limits the engagement with the interface portion 1321. The interface portion 1321 can improve the firmness of the engagement between the wiring harness and the three first pins 121.

[0071] In one possible implementation, the interface portion 1321 includes a peripheral wall portion 1321c and a bottom wall portion 1321b. The peripheral wall portion 1321c is located within the winding assembly 110, and at least a portion of the peripheral wall portion 1321c is located within the winding assembly 110. The peripheral wall portion 1321c extends from the bottom wall portion 1321b toward one axial side of the winding assembly 110.

[0072] For ease of understanding, such as Figure 6As shown, the bottom wall portion 1321b is generally a planar wall, and the peripheral wall portion 1321c is generally a tube wall. Along the radial direction of the winding assembly 110, the bottom wall portion 1321b is located inside the winding assembly 110; along the axial direction of the winding assembly 110, the bottom wall portion 1321b and the winding assembly 110 overlap, thus making the structure of the bottom wall portion 1321b and the winding assembly 110 more compact, which is more conducive to reducing the size of the stator assembly 100. Similarly, along the radial direction of the winding assembly 110, the peripheral wall portion 1321c is located inside the winding assembly 110; along the axial direction of the winding assembly 110, a portion of the peripheral wall portion 1321c overlaps with the winding assembly 110, thus making the structure of the peripheral wall portion 1321c and the winding assembly 110 more compact, which is more conducive to reducing the size of the stator assembly 100. Specifically, the bottom wall portion 1321b is located in the center hole 112, and a portion of the peripheral wall portion 1321c is located in the center hole 112.

[0073] Three first pins 121 are engaged with the bottom wall portion 1321b. The bottom wall portion 1321b has four limiting holes 1321d, through which the three first pins 121 pass respectively. At least a portion of the first pins 121 are located in the limiting holes 1321d. The outer wall of the first pins 121 and the inner wall forming the limiting holes 1321d are engaged to facilitate the engagement of the wire harness, the first pins 121, and the interface portion 1321.

[0074] In one possible implementation, at least a portion of the winding assembly 110 is located within the stator housing 130, the stator housing 130 and the connector assembly 120 are mutually constrained, the stator housing 130 includes a first end cap 132 located on one axial side of the central hole 112, and the first end cap 132 and the interface portion 1321 are an integral structure or mutually constrained.

[0075] For ease of understanding, such as Figure 7 As shown, the stator housing 130 includes a cylindrical body 131 and a first end cap 132 that are mutually restrictive. The cylindrical body 131 is cylindrical in shape and includes a large-diameter section 1311 and a small-diameter section 1312. The diameter of the large-diameter section 1311 is larger than the diameter of the small-diameter section 1312. The large-diameter section 1311, the small-diameter section 1312 and the winding assembly 110 are coaxially arranged. A portion of the winding assembly 110 is located in the small-diameter section 1312. The outer side wall of the base 152 and the inner side wall forming the small-diameter section 1312 are mutually restrictive. The cylindrical body 131 includes a limiting part 1313. At least a portion of the limiting part 1313 is located in the large-diameter section 1311. The second pin 123 is mutually restrictive with the limiting part 1313.

[0076] The first end cap 132 is located on one axial side of the winding assembly 110, and the first connecting section 122 is located on the other axial side of the winding assembly 110. The first connecting section 122 and the first end cap 132 are located on the two axial sides of the cylinder 131, respectively. The first end cap 132 and the interface 1321 are an integral structure. This layout is more reasonable and more conducive to reducing the size of the stator assembly 100.

[0077] In one possible implementation, the stator assembly 100 includes a grounding assembly 140 electrically connected to the stator core 150. The grounding assembly 140 includes a first grounding pin 141, the length direction of which is parallel to the axial direction of the winding assembly 110. Along the radial direction of the winding assembly 110, the first grounding pin 141 and the first pin 121 are arranged sequentially, and at least a portion of the first grounding pin 141 is located in the interface cavity 1321a of the interface portion 1321.

[0078] For ease of understanding, such as Figure 1 and Figure 8 As shown, the first grounding pin 141 is needle-shaped. Along the radial direction of the winding assembly 110, the first grounding pin 141 and three first pins 121 are arranged sequentially, side by side. A portion of the first grounding pin 141 is located in the interface cavity 1321a. Along the radial direction of the winding assembly 110, the first grounding pin 141 is located inside the winding assembly 110; along the axial direction of the winding assembly 110, a portion of the first grounding pin 141 overlaps with the winding assembly 110. The grounding assembly 140 and the winding assembly 110 have a compact structure, which is more conducive to reducing the size of the stator assembly 100.

[0079] In one possible implementation, the stator core 150 includes a base 152, which is arranged sequentially along the axial direction of the winding assembly 110. The base 152 and at least three core portions 151 are integral structures or mutually restrictive. The grounding assembly 140 includes a second grounding pin 143, the length direction of which is parallel to the axial direction of the winding assembly 110. The second grounding pin 143 is mutually restrictive with the base 152. Along the radial direction of the winding assembly 110, the second grounding pin 143 is located on the outer or inner side of the winding assembly 110. The number of second grounding pins 143 is less than the number of core portions 151.

[0080] For ease of understanding, such as Figure 5As shown, the base 152 and at least two cores 151 are an integral structure. The base 152 is generally annular in shape, and at least two cores 151 are located on one axial side of the base 152. The base 152 and the winding assembly 110 are coaxially arranged. Along the axial direction of the winding assembly 110, the base 152, the winding assembly 110, and the first connecting section 122 are arranged sequentially. Along the radial direction of the winding assembly 110, the second grounding pin 143 is generally located on the outside of the winding assembly 110. The limiting and mating structure between the second grounding pin 143 and the base 152 is a plug-in structure. This makes the structure of the second grounding pin 143 and the winding assembly 110 compact, which is more conducive to reducing the size of the stator assembly 100.

[0081] In one possible implementation, the grounding assembly 140 further includes a second connecting segment 142, which is integrally formed or in a limiting fit with the first grounding pin 141. The second connecting segment 142 and the second grounding pin 143 are also integrally formed or in a limiting fit. The first grounding pin 141 is electrically connected to the second grounding pin 143 via the second connecting segment 142. Along the axial direction of the winding assembly 110, the second connecting segment 142 and the first connecting segment 142 may be located on the same side of the winding assembly 110.

[0082] For ease of understanding, such as Figure 9 As shown, the second connecting section 142 includes a third receiving portion 1421 and a fourth receiving portion 1422. A portion of the first grounding pin 141 is located inside the third receiving portion 1421, and the outer wall of the first grounding pin 141 is in a limiting fit with the inner wall of the third receiving portion 1421. A portion of the second grounding pin 143 is located inside the fourth receiving portion 1422, and the outer wall of the second grounding pin 143 is in a limiting fit with the inner wall of the fourth receiving portion 1422. This facilitates the separate assembly of the first grounding pin 141, the second grounding pin 143, and the second connecting section 142.

[0083] The first grounding pin 141 is limited to the bottom wall portion 1321b. The first grounding pin 141 passes through the limiting hole 1321d. A portion of the first grounding pin 141 is located in the limiting hole 1321d. The outer wall of the first grounding pin 141 is limited to the inner wall forming the limiting hole 1321d.

[0084] In summary, the winding assembly 110 is part of the axial flux motor. The rotor does not need to be placed in its central hole 112. The first pin 121, the first grounding pin 141, and the interface part 1321 are basically located in the central hole 112, which does not occupy the outer space of the winding assembly 110. The space of the central hole 112 is fully utilized, making the structure of the stator assembly 100 more compact. This is beneficial to reducing the size of the stator assembly 100.

[0085] Embodiments of the present invention also provide an electric device 10, which is described below in conjunction with... Figures 1 to 10, introduce the electric device 10 in detail. The electric device 10 includes a fluid component 200 and a stator component 100. The fluid component 200 includes an execution component 220 and a magnetic rotor 210. The magnetic rotor 210 and the stator component 100 can form an electric motor. The stator component 100 includes a winding component 110, a plugging component 120, an interface portion 1321, and a stator housing 130.

[0086] In a possible implementation, the winding component 110 is electrically connected to the plugging component 120. Part of the plugging component 120 is located in the interface cavity 1321a of the interface portion 1321. Along the radial direction of the winding component 110, at least part of the interface portion 1321 is located inside the winding component 110; along the axial direction of the winding component 110, at least part of the interface portion 1321 and the winding component 110 are overlapped; the fluid component 200 includes an execution component 220. The execution component 220 is an impeller or a valve core. The execution component 220 and the magnetic rotor 210 are in limit cooperation, and the execution component 220 and the magnetic rotor 210 can rotate relative to the stator component 100.

[0087] For the convenience of understanding, as Figure 2 shown, the execution component 220 and the magnetic rotor 210 are an integral structure. The execution component 220 is an impeller, and the electric device 10 can also be called an electric pump. The fluid component 200 and the stator component 100 are in limit cooperation.

[0088] In a possible implementation, the plugging component 120 includes a first pin 121, a first connection section 122, and a second pin 123. The first pin 121 is electrically connected to the first connection section 122, and the first connection section 122 is electrically connected to the second pin 123. At least part of the first pin 121 is located in the interface cavity 1321a; along the radial direction of the winding component 110, the first pin 121 is located inside the winding component 110, and the second pin 123 is located outside the winding component 110. Part of the first connection section 122 is located inside the winding component 110; along the axial direction of the winding component 110, part of the first pin 121 and the winding component 110 are overlapped, part of the second pin 123 and the winding component 110 are overlapped, and the first connection section 122 and the winding component 110 are arranged in sequence.

[0089] For the convenience of understanding, as Figure 4 and Figure 8 shown, the first pin 121, the first connection section 122, and the second pin 123 are generally in an inverted "U" shape, generally surrounding part of the winding component 110. The structure of the plugging component 120 and the winding component 110 is compact, which is more conducive to reducing the size of the electric device 10.

[0090] In one possible implementation, the fluid assembly 200 includes at least one of a pump housing 230, a magnetic rotor 210, and an actuator 220. The pump housing 230 is rotatably fitted with the magnetic rotor 210 and the actuator 220, which are located within the pump housing 230. Along the axial direction of the winding assembly 110, the pump housing 230 is located on one side of the winding assembly 110. The first connecting section 122 is in a limiting fit with the pump housing 230, and the first pin 121 is in a limiting fit with the interface portion 1321.

[0091] For ease of understanding, such as Figure 2 As shown, the magnetic rotor 210 and the actuator 220 are located inside the pump housing 230. The magnetic rotor 210 and the actuator 220 can rotate inside the pump housing 230, which can drive the fluid flow inside the pump housing 230 and realize fluid control.

[0092] The first pin 121 and the second pin 123 extend from the first connecting section 122 toward one axial side of the winding assembly 110. Part of the wire harness can be located on one axial side of the winding assembly 110, limiting and engaging with the interface 1321 and the first pin 121. The pump housing 230 is located on the other axial side of the winding assembly 110, thus avoiding interference between the positions of the wire harness and the pump housing 230. The first connecting section 122 and the pump housing 230 are mutually limiting and engaging. The first connecting section 122 is located on the outer wall of the pump housing 230, allowing fluid to flow through the inner wall of the pump housing 230. The fluid can absorb heat from the connector assembly 120 and the winding assembly 110 through the pump housing 230, which is beneficial for heat dissipation of the connector assembly 120 and the winding assembly 110, thereby improving the operational reliability of the electric device 10.

[0093] Furthermore, the limiting fit between the first connecting section 122 and the pump housing 230 includes, but is not limited to, at least one of printing, electroplating, and coating. For example... Figures 2-4 As shown, the pump housing 230 includes a partition 231, and the first connecting section 122 is a copper strip, which is electroplated onto the outer wall of the partition 231. This improves the fit between the first connecting section 122 and the pump housing 230. Moreover, the first connecting section 122 is either in contact with or has a gap from the end wall of the winding assembly 110, which is more conducive to improving the structural compactness of the pump shaft.

[0094] Furthermore, the limiting engagement structure of the first pin 121 and the first connecting segment 122 includes an elastic terminal, and the engagement structure of the second pin 123 and the first connecting segment 122 also includes an elastic terminal.

[0095] For ease of understanding, such as Figure 8 and Figure 9As shown, the first connecting segment 122 includes a resilient terminal that engages with the first pin 121; the second pin 123 includes another resilient terminal, which is a fisheye terminal, and also engages with the first connecting segment 122. Considering that the electric device 10 can generate vibrations along the axial direction of the winding assembly 110, the aforementioned resilient connection structure improves the electrical connection yield between the first pin 121 and the first connecting segment 122, as well as the electrical connection yield between the second pin 123 and the second connecting segment 142, reducing the occurrence of poor contact problems.

[0096] Furthermore, along the axial direction of the winding assembly 110, the fluid assembly 200 and the interface portion 1321 are arranged sequentially with a gap between them. The fluid assembly 200 and the first connecting section 122 are also arranged sequentially with a gap between them. This arrangement can also reduce the impact of vibration of the fluid assembly 200 on the electrical fit of the connector assembly 120.

[0097] Furthermore, along the axial direction of the winding assembly 110, the magnetic rotor 210 and the first pin 121 are arranged in sequence. The magnetic rotor 210 and the first pin 121 have a compact structure, which is more conducive to reducing the size of the electric device 10.

[0098] Furthermore, along the axial direction of the winding assembly 110, the magnetic rotor 210, the first connecting section 122, and the winding assembly 110 are arranged in sequence, and the above arrangement structure is more compact, which is more conducive to reducing the size of the electric device 10.

[0099] The aforementioned electric device 10 can be part of a thermal management system, which can be part of a vehicle, including but not limited to new energy vehicles (also known as electric vehicles). Thanks to the miniaturization of the electric device 10, the application of the aforementioned thermal management system in a vehicle has a significant effect on saving interior space, reducing energy consumption, and improving passenger space. For example, when designing a vehicle, the aforementioned thermal management system can greatly reduce the encroachment on interior space. This extra space can lead to diversified interior space designs, such as providing more space for the power battery to increase driving range, or leaving more space for passengers or the trunk, or even changing the vehicle's functions to meet diverse usage needs.

[0100] Those skilled in the art should understand that the technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the technical solutions shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An electric machine comprising a stator assembly (100), the stator assembly (100) comprising a winding assembly (110), a connector assembly (120) and an interface portion (1321), the winding assembly (110) electrically connecting the connector assembly (120), part of the connector assembly (120) being located in an interface cavity (1321a) of the interface portion (1321), at least part of the interface portion (1321) being located radially inside the winding assembly (110); at least part of the interface portion (1321) and the winding assembly (110) being arranged axially overlapping.

2. The electric machine of claim 1, wherein, An inner wall forming the interface cavity (1321a) comprises a bottom wall portion (1321b), the connector assembly (120) and the bottom wall portion (1321b) being limitingly fitted, the bottom wall portion (1321b) being located radially inside the winding assembly (110); the bottom wall portion (1321b) and the winding assembly (110) being arranged axially overlapping.

3. The electric machine of claim 2, wherein, An inner wall forming the interface cavity (1321a) comprises a peripheral wall portion (1321c), the peripheral wall portion (1321c) being located radially inside the winding assembly (110); at least part of the peripheral wall portion (1321c) and the winding assembly (110) being arranged axially overlapping; the peripheral wall portion (1321c) extending from the bottom wall portion (1321b) to an axial side of the winding assembly (110).

4. The electric machine of any one of claims 1 to 3, characterized in that The connector assembly (120) comprises first pins (121), at least part of the first pins (121) being located in the interface cavity (1321a), the first pins (121) and the interface portion (1321) being limitingly fitted, the first pins (121) being located radially inside the winding assembly (110); at least part of the first pins (121) and the winding assembly (110) being arranged axially overlapping.

5. The electric machine of claim 4, wherein, The connector assembly (120) comprises second pins (123), the second pins (123) electrically connecting the first pins (121), the second pins (123) electrically connecting the winding assembly (110), the second pins (123) and the winding assembly (110) being limitingly fitted, the second pins (123) being located radially outside or inside the winding assembly (110); at least part of the second pins (123) and the winding assembly (110) being arranged axially overlapping.

6. The electric machine of claim 5, wherein, The connector assembly (120) includes a first connecting section (122) electrically connected to the first pin (121), the first connecting section (122) and the first pin (121) being an integral structure or a limited position fit; the first connecting section (122) is electrically connected to the second pin (123), the second connecting section (142) and the second pin (123) being an integral structure or a limited position fit; at least part of the first connecting section (122) is located inside the winding assembly (110) or at least part of the first connecting section (122) is located at the axial side of the winding assembly (110).

7. The electric machine of claim 6, wherein, The motor includes a magnetic rotor (210) capable of rotating relative to the stator assembly (100), the magnetic rotor (210) being located at the axial side of the winding assembly (110), and at least part of the first connecting section (122) being located between the magnetic rotor (210) and the winding assembly (110).

8. The electric machine of any one of claims 1 to 7, characterized by The stator assembly (100) includes a grounding assembly (140) and a stator core (150), the grounding assembly (140) being electrically connected to the stator core (150), at least part of the grounding assembly (140) being located in the interface cavity (1321a), and at least part of the grounding assembly (140) being located inside the winding assembly (110).

9. An electric device (10) comprising a motor and an execution component (220); the motor includes a stator assembly (100) and a magnetic rotor (210), the stator assembly (100) includes a winding assembly (110), a connector assembly (120) and an interface part (1321), the winding assembly (110) is electrically connected to the connector assembly (120), part of the connector assembly (120) is located in the interface cavity (1321a) of the interface part (1321), along the radial direction of the winding assembly (110), at least part of the interface part (1321) is located inside the winding assembly (110); along the axial direction of the winding assembly (110), at least part of the interface part (1321) and the winding assembly (110) are arranged in an overlapping manner; the execution component (220) includes an impeller or a valve core, the execution component (220) and the magnetic rotor (210) are in a limited position fit, and the execution component (220) and the magnetic rotor (210) are capable of rotating relative to the stator assembly (100).

10. The electrically powered device (10) according to claim 9, characterized in that The connector assembly (120) comprises a first pin (121), a first connecting segment (122) and a second pin (123), the first pin (121) is electrically connected to the first connecting segment (122), the first connecting segment (122) is electrically connected to the second pin (123), at least part of the first pin (121) is located in the interface cavity (1321a); the second pin (123) is located outside the winding assembly (110), along the axial direction of the winding assembly (110), part of the first pin (121) and the winding assembly (110) are arranged in overlap, at least part of the first connecting segment (122) is located on the axial side of the winding assembly (110) close to the magnetic rotor (210).

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