Stator assembly, electric machine and vehicle

Abstract

The present disclosure relates to a stator assembly, an electric machine and a vehicle, the stator assembly comprising a coil winding, a stator core and an insulation piece, the coil winding being wound around the stator core, the stator core being provided with a wire slot, a part of the coil winding being arranged in the wire slot, the stator core being provided with a liquid inlet channel and a heat dissipation channel, one end of the heat dissipation channel being in communication with the liquid inlet channel, the heat dissipation channel being used for guiding the cooling liquid to the stator core and the wire slot, the other end of the heat dissipation channel being arranged at the end of the stator core in the axial direction of the stator assembly, the insulation piece being connected to the coil winding, a part of the insulation piece being connected to the end of the stator core in the axial direction of the stator assembly. The cooling liquid of the stator assembly flows out from one end of the heat dissipation channel at the end of the stator core in the axial direction of the stator assembly, and can flow to the end of the coil winding in the axial direction of the stator assembly, thereby cooling and dissipating heat for the end of the coil winding in the axial direction of the stator assembly.

Description

Technical Field

[0001] This disclosure relates to the field of electric motor technology, and more particularly to a stator assembly, an electric motor, and a vehicle. Background Technology

[0002] In related technologies, the stator assembly often focuses on cooling and heat dissipation of the stator core, but the cooling and heat dissipation effect on the coil winding is not ideal, which in turn affects the performance of the motor. Summary of the Invention

[0003] The purpose of this disclosure is to provide a stator assembly, an electric motor, and a vehicle to solve the problems in the aforementioned related technologies.

[0004] To achieve the above objectives, one aspect of this disclosure provides a stator assembly comprising: Coil winding; A stator core, on which the coil winding is wound, the stator core is provided with slots, a portion of the coil winding is disposed in the slots, the stator core is provided with a liquid inlet channel and a heat dissipation channel, one end of the heat dissipation channel is connected to the liquid inlet channel so that the coolant in the liquid inlet channel can flow to the heat dissipation channel, the heat dissipation channel is used to guide the coolant to the stator core and the slots so that the coolant in the heat dissipation channel can exchange heat with the stator core and the coil winding, the other end of the heat dissipation channel is disposed at the end of the stator core in the axial direction of the stator assembly so that the coolant flowing out of the heat dissipation channel can flow to the end of the coil winding in the axial direction of the stator assembly; An insulating element is connected to the coil winding, a portion of which is connected to the end of the stator core in the axial direction of the stator assembly to close the gap between the slot opening of the wire groove in the axial direction of the stator assembly and the coil winding, and to restrict the flow of coolant from the slot opening of the wire groove.

[0005] In the above technical solution, the gap between the slot opening of the wire groove in the axial direction of the stator assembly and the coil winding is sealed by an insulating component, thereby restricting the flow of coolant from the slot opening in the axial direction of the stator assembly. This allows the coolant to flow out from one end of the heat dissipation channel located at the end of the stator core in the axial direction of the stator assembly, and to flow to the end of the coil winding in the axial direction of the stator assembly, thus cooling and dissipating heat at that end. The heat dissipation channel can exchange heat with the stator core, thereby enabling the coolant to cool and dissipate heat from both the stator core and the coil winding, improving the cooling and heat dissipation effect of the coil winding, and ultimately improving the overall performance of the motor.

[0006] In some possible implementations, there are two sets of cooling channels, both sets of cooling channels are connected to the liquid inlet channel, and the coolant flowing in at least some locations in the two sets of cooling channels flows in opposite directions.

[0007] This configuration increases the flow rate of coolant in the stator core, thereby increasing the heat exchange area and improving heat exchange efficiency.

[0008] In some possible implementations, each set of heat dissipation channels includes a first channel, a second channel, a third channel, and a fourth channel; The first flow channel is connected to the liquid inlet flow channel, and one end of the fourth flow channel is disposed on the end face of the stator core in the axial direction of the stator assembly to guide the coolant out of the stator core. The third flow channel includes a first sub-flow channel and a second sub-flow channel. The first sub-flow channel is connected to the first flow channel and the second flow channel respectively, and the second sub-flow channel is connected to the second flow channel and the fourth flow channel respectively. In the radial direction of the stator assembly, the first flow channel is close to the outer peripheral wall of the stator core, and the second flow channel is close to the slot and communicates with the slot.

[0009] This design facilitates the flow of coolant, allowing for cooling and heat dissipation at different locations on the stator core and coil windings.

[0010] In some possible implementations, the first flow channel and the second flow channel both extend along the axial direction of the stator assembly, and the third flow channel extends along the radial direction of the stator assembly; The coolant flows in opposite directions in the first channel of the two sets of heat dissipation channels, the coolant flows in opposite directions in the second channel of the two sets of heat dissipation channels, and the coolant flows in opposite directions in the first channel and the second channel of one set of heat dissipation channels. The third channel of each of the two sets of heat dissipation channels is located close to both ends of the stator core in the axial direction of the stator assembly.

[0011] This configuration increases heat exchange time and area, thereby improving cooling efficiency.

[0012] In some possible implementations, there are multiple slots, which are spaced apart around the axis of the stator assembly, and each slot has a second flow channel on both sides of the stator assembly in the circumferential direction. Wherein, the flow direction of the coolant in the second flow channels on both sides of the same groove is the same, and the flow direction of the coolant in the second flow channels on both sides of two adjacent grooves is opposite; or, The coolant flows in opposite directions in the second flow channels on both sides of the same groove.

[0013] This configuration ensures effective cooling of the coil windings while allowing for selection of the specific stator core structure to meet diverse needs.

[0014] In some possible implementations, the stator core includes a plurality of core portions stacked in the axial direction of the stator assembly; The core section includes two first core sections, each of which includes a first sub-section and a second sub-section. The first sub-section and the second sub-section are stacked in the axial direction of the stator assembly. The heat dissipation channel includes a first channel and a third channel. The first sub-part includes a plurality of first laminations. The plurality of first laminations are stacked in the axial direction of the stator assembly. Each first lamination is provided with a first opening. The first openings of the plurality of first laminations are interconnected to form the first channel. The third flow channel is located in the second sub-section.

[0015] This configuration facilitates the formation of the first and third flow channels for coolant flow.

[0016] In some possible implementations, the third flow channel includes a second opening formed in the second sub-part, the second sub-part having a through hole, and the second opening communicating with the through hole; The heat dissipation channel further includes a second channel and a fourth channel. The second port includes a first sub-port and a second sub-port. The first sub-port is connected to the first channel and the second channel, and the second sub-port is connected to the second channel and the fourth channel.

[0017] This configuration facilitates the connection between the first and second flow channels, as well as the connection between the second and fourth flow channels.

[0018] In some possible implementations, notches are provided on both sides of the through hole of the second sub-part, and the first sub-port and the second sub-port are respectively connected to the notches on both sides of the through hole, so that the flow direction of the coolant in the second flow channel on both sides of the same groove is opposite.

[0019] This configuration ensures that the flow of coolant within the coil groove is not affected, thus guaranteeing heat exchange between the coolant and the coil winding.

[0020] In some possible implementations, the first sub-port includes a first segment and a second segment, which are interconnected, and the first segment is connected to the notch on one side of the corresponding through hole; Each of the first sub-parts is provided with a plurality of first ports, which are distributed at intervals around the axis of the stator assembly. The two first segments of two adjacent first sub-ports are connected to one first port of a first sub-part near the second sub-part, and the two second segments of two adjacent first sub-ports are connected to another first port of a first sub-part near the second sub-part.

[0021] By setting it up this way, the number of inlets can be increased, thereby increasing the flow rate of coolant.

[0022] In some possible implementations, the second sub-part has a plurality of through holes and a plurality of second openings, with each second opening corresponding to one of the through holes in the second sub-part. In the axial direction of the stator assembly, the two second sub-parts are staggered, such that the first sub-port of one of the two second sub-parts is opposite to the second sub-port of the other second sub-part.

[0023] This design ensures that the coolant in the two sets of heat dissipation channels does not interfere with each other when it flows into the same groove, thus avoiding affecting the flow of coolant.

[0024] In some possible implementations, notches are provided on both sides of the through hole of the second sub-part, and two first sub-ports or two second sub-ports are provided on both sides of the through hole, and are respectively connected to the notches on both sides, so that the flow direction of the coolant in the second flow channel on both sides of the same groove is consistent. The second sub-part has multiple through holes, which are distributed at intervals around the axis of the stator assembly. In the second sub-part, two first sub-ports are provided on both sides of one of the two through holes, and two second sub-ports are provided on both sides of the other through hole, so that the flow direction of the coolant in the second flow channel on both sides of the two adjacent grooves is opposite.

[0025] This arrangement ensures that the coolant flows in the same direction in the second flow channels on both sides of the formed groove, while the coolant flows in opposite directions in the second flow channels of two adjacent grooves, which facilitates heat exchange with the coil winding.

[0026] In some possible implementations, each first sub-part is provided with a plurality of first ports, the plurality of first ports being spaced apart around the axis of the stator assembly, and one first sub-port communicating with another first port.

[0027] This configuration facilitates the connection between the first and second flow channels.

[0028] In some possible implementations, in the axial direction of the stator assembly, the two second sub-parts are staggered, such that the through hole of the first sub-port in one of the two second sub-parts is opposite to the through hole of the second sub-port in the other second sub-part.

[0029] This design allows the coolant to flow through two separate heat dissipation channels, enabling heat exchange.

[0030] In some possible implementations, the core portion further includes a second core portion and two third core portions; The second iron core is disposed between the two first iron cores. The outer diameter of the second iron core is smaller than the outer diameter of the two first iron cores, so that the second iron core and the two first iron cores surround to form a groove. The groove is used to cooperate with the outer shell to form the liquid inlet channel. The first sub-part is connected to the second iron core, and the second sub-part is connected to the third iron core. The second iron core portion, the two first iron core portions, and the two third iron core portions are all provided with through holes, and the through holes of the second iron core portion, the two first iron core portions, and the two third iron core portions are interconnected to form the wire groove.

[0031] This setup facilitates the formation of inlet oil channels and grooves.

[0032] In some possible implementations, the heat dissipation channel includes a second channel, and the side edges of the through holes in the second iron core and the two first iron cores are provided with notches, and the notches in the second iron core and the two first iron cores are interconnected to form the second channel.

[0033] This setup facilitates the formation of a second flow channel.

[0034] In some possible implementations, the heat dissipation channel includes a fourth channel, which is configured as a third opening formed in the third iron core portion.

[0035] This configuration facilitates the formation of a fourth flow channel.

[0036] In some possible implementations, the insulating element has an opening in a portion of the slot for coolant flow, allowing the coolant in the slot to contact the coil winding.

[0037] This configuration improves the cooling efficiency of the coil windings.

[0038] In some possible implementations, the insulating element is insulating paper, and the circumferential edges of both ends of the insulating element in the axial direction of the stator assembly are configured to be foamed and form foamed portions. A portion of the insulating element extending along the axial direction of the stator assembly is configured to be foamed and form foamed portions, so that a portion of the insulating element bulges. The outer wall of a portion of the insulating element is connected to the stator core, and the inner wall of a portion of the insulating element is connected to the coil winding.

[0039] This design creates a seal while preventing the opening from being blocked, ensuring that the coolant is in contact with the coil windings and preventing coolant leakage.

[0040] A second aspect of this disclosure also provides an electric motor including the stator assembly described above.

[0041] A third aspect of this disclosure also provides a vehicle including the aforementioned stator assembly or the aforementioned motor.

[0042] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the stator assembly according to one embodiment of the present disclosure.

[0044] Figure 2 This is a schematic diagram of the assembly relationship between the stator core and the outer shell according to one embodiment of the present disclosure.

[0045] Figure 3 yes Figure 2 An enlarged diagram of position A in the middle.

[0046] Figure 4 This is an exploded schematic diagram of a stator core according to one embodiment of the present disclosure.

[0047] Figure 5 This is a schematic diagram of the structure of the first stacked sheet according to one embodiment of the present disclosure.

[0048] Figure 6 yes Figure 5 An enlarged view of position B in the middle.

[0049] Figure 7 This is a schematic diagram of the structure of the second sub-part of one embodiment of this disclosure.

[0050] Figure 8 yes Figure 7An enlarged diagram of position C in the middle.

[0051] Figure 9 This is a schematic diagram of the structure of the second iron core section according to one embodiment of the present disclosure.

[0052] Figure 10 yes Figure 9 An enlarged diagram of position D in the middle.

[0053] Figure 11 This is a schematic diagram of the structure of the third iron core section according to one embodiment of the present disclosure.

[0054] Figure 12 yes Figure 11 An enlarged diagram of position E in the middle.

[0055] Figure 13 This is a schematic diagram of the connection relationship between the first port and the first sub-port according to one embodiment of this disclosure.

[0056] Figure 14 This is a schematic diagram of the connection relationship between the third port and the second sub-port in one embodiment of this disclosure.

[0057] Figure 15 This is a schematic diagram of the structure of an insulating component according to one embodiment of the present disclosure.

[0058] Figure 16 This is a schematic diagram of the structure of the second sub-part of the second embodiment of this disclosure.

[0059] Figure 17 This is a schematic diagram of the structure of the second sub-part of the third embodiment of this disclosure.

[0060] Figure 18 This is a structural schematic diagram of the foaming location of the insulating component according to one embodiment of the present disclosure.

[0061] Figure 19 This is a schematic diagram of the flow direction of coolant in the stator core according to one embodiment of the present disclosure. The direction indicated by the red arrow is the flow direction of coolant in one set of heat dissipation channels, and the direction indicated by the yellow arrow is the flow direction of coolant in another set of heat dissipation channels.

[0062] Explanation of reference numerals in the attached figures 1. Stator core; 11. First core section; 111. First sub-section; 1111. First lamination; 112. Second sub-section; 12. Second core section; 13. Third core section; 2. Liquid inlet channel; 21. Groove; 3. Heat dissipation channels; 31. First channel; 32. Second channel; 33. Third channel; 331. First sub-channel; 332. Second sub-channel; 34. Fourth channel; 4. Cable groove; 41. Through hole; 42. Notch; 5. Coil winding; 61. First bite; 62. Second bite; 621. First sub-bit; 6211. First segment; 6212. Second segment; 622. Second sub-bit; 63. Third bite. 7. Insulating component; 71. Opening; 72. Foaming section; 8. Outer shell; 81. Liquid inlet. Detailed Implementation

[0063] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0064] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the inner and outer parts of the relevant components. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0065] In the description of this disclosure, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0066] The electric motor is a core component of the drive system in new energy vehicles, and its cooling performance directly determines its performance ceiling under high load conditions, especially the cooling of the stator assembly. Currently, the mainstream cooling method is to dissipate heat from the stator assembly using coolant.

[0067] In related technologies, the stator assembly often focuses primarily on cooling the stator core, with less effective cooling of the coil windings, thus affecting the performance of the motor. Specifically, in these technologies, the coolant exchanges heat with the stator core to remove heat, while the heat from the coil windings is transferred to the coolant through the stator core. Consequently, the coil windings cannot dissipate heat effectively and in a timely manner, resulting in low cooling efficiency and impacting the overall motor performance.

[0068] Therefore, such as Figures 1-19 As shown, one aspect of this disclosure provides a stator assembly, including a coil winding 5, a stator core 1, and an insulator 7.

[0069] The coil winding 5 is wound on the stator core 1, and the stator core 1 is provided with a slot 4. A part of the coil winding 5 is disposed in the slot 4. The slot 4 can fix the coil winding 5, so that the coil winding 5 is fixed on the stator core 1.

[0070] The stator core 1 is provided with a coolant inlet channel 2 and a coolant dissipation channel 3. One end of the coolant dissipation channel 3 is connected to the coolant inlet channel 2, allowing the coolant in the coolant inlet channel 2 to flow to the coolant dissipation channel 3. The other end of the coolant dissipation channel 3 is located at the end of the stator core 1 along the axial direction of the stator assembly, allowing the coolant flowing out of the coolant dissipation channel 3 to flow to the end of the coil winding 5 along the axial direction of the stator assembly. It can be understood that the coolant flows into the coolant inlet channel 2 from the outside, flows through the coolant inlet channel 2 to the coolant dissipation channel 3, and is guided by the coolant dissipation channel 3 to the stator core 1 and the coil winding 5. The coolant can be cooling oil.

[0071] Insulator 7 is connected to coil winding 5. A portion of insulator 7 is connected to the end of stator core 1 in the axial direction of stator assembly to close the gap between slot 4 in the axial direction of stator assembly and coil winding 5, and to restrict coolant from flowing out of slot 4.

[0072] In the above technical solution, the gap between the slot 4 in the axial direction of the stator assembly and the coil winding 5 is sealed by the insulating component 7, thereby restricting the flow of coolant from the slot 4 in the axial direction of the stator assembly. This allows the coolant to flow out from one end of the heat dissipation channel 3 located at the end of the stator core 1 in the axial direction of the stator assembly, and to flow to the end of the coil winding 5 in the axial direction of the stator assembly, thus cooling the end of the coil winding 5 in the axial direction of the stator assembly. The heat dissipation channel 3 can exchange heat with the stator core 1, thereby cooling both the stator core 1 and the coil winding 5, improving the cooling effect of the coil winding 5, and ultimately improving the overall performance of the motor.

[0073] Optionally, in one embodiment of this disclosure, the heat dissipation channel 3 is used to guide the coolant to the stator core 1 and the slot 4, so that the coolant in the heat dissipation channel 3 can exchange heat with the stator core 1 and the coil winding 5. By guiding the coolant to the stator core 1 and the slot 4 through the heat dissipation channel 3, the stator core 1 can exchange heat with the coolant, thereby achieving cooling and heat dissipation of the stator core 1. In addition, the coolant is in the slot 4, so that the coolant can directly exchange heat with the coil winding 5 without the need for the stator core 1 as an intermediary, thereby improving the heat exchange efficiency and the cooling and heat dissipation effect on the coil winding 5.

[0074] Optionally, in one embodiment of this disclosure, the number of heat dissipation channels 3 is two sets, both sets of heat dissipation channels 3 are connected to the liquid inlet channel 2, and the flow directions of the coolant flowing in at least some positions in the two sets of heat dissipation channels 3 are opposite. By setting two sets of heat dissipation channels 3, the flow rate of coolant in the stator core 1 can be increased, thereby increasing the heat exchange area. In addition, by opposing the flow directions of the coolant in at least some positions in the two sets of heat dissipation channels 3, the two sets of heat dissipation channels 3 flow in different directions, enabling heat exchange with different areas of the stator core 1 and the coil winding 5, improving heat exchange efficiency, thereby improving the overall cooling and heat dissipation effect, and thus improving the cooling and heat dissipation effect on the constructed stator assembly, and improving the performance of the constructed motor. The number of each set of heat dissipation channels 3 can be multiple, realizing multi-path flow of coolant.

[0075] Optionally, in one embodiment of this disclosure, the liquid inlet channel 2 is located near the center of the stator core 1 along the axial direction of the stator assembly. One end of each of the two sets of heat dissipation channels 3 is connected to the liquid inlet channel 2, and the other ends of the two sets of heat dissipation channels 3 are located at both ends of the stator core 1 along the axial direction of the stator assembly. With this arrangement, coolant can be introduced from the center of the stator core 1 along the axial direction of the stator assembly and then flow to both ends of the stator core 1, achieving cooling and heat dissipation and improving heat exchange efficiency.

[0076] It is understandable that the coolant flows from the outside into the inlet channel 2, and then flows through the inlet channel 2 to the two sets of heat dissipation channels 3, realizing the total and separate flow of the coolant. That is to say, the coolant enters from the inlet channel 2 and then flows to the two sets of heat dissipation channels 3 respectively.

[0077] In addition, by allowing coolant to flow out from both ends of the stator core 1 along the axial direction of the stator assembly, it can be sprayed onto both ends of the coil winding 5 along the axial direction of the stator assembly, thereby cooling and dissipating heat at both ends of the coil winding 5 along the axial direction of the stator assembly and improving the cooling and heat dissipation effect.

[0078] Alternatively, in another embodiment of this disclosure, the liquid inlet channel 2 is located near one end of the stator core 1 in the axial direction of the stator assembly, one end of the two sets of heat dissipation channels 3 is connected to the liquid inlet channel 2, and the other ends of the two sets of heat dissipation channels 3 are located at both ends of the stator core 1 in the axial direction of the stator assembly, so that the coolant flowing out from the two sets of heat dissipation channels 3 can flow to both ends of the coil winding 5 in the axial direction of the stator assembly.

[0079] Optionally, in one embodiment of this disclosure, each heat dissipation channel 3 includes a first channel 31, a second channel 32, a third channel 33, and a fourth channel 34.

[0080] The first flow channel 31 is connected to the inlet flow channel 2, and one end of the fourth flow channel 34 is located on the end face of the stator core 1 along the axial direction of the stator assembly to guide the coolant out of the stator core 1. The coolant in the inlet flow channel 2 can flow into the first flow channel 31, thus introducing the coolant. The fourth flow channel 34 is used for coolant outflow, guiding the coolant to both ends of the coil winding 5 along the axial direction of the stator assembly, improving the cooling and heat dissipation effect on the coil winding 5.

[0081] The third flow channel 33 includes a first sub-flow channel 331 and a second sub-flow channel 332. The first sub-flow channel 331 is connected to both the first flow channel 31 and the second flow channel 32, and the second sub-flow channel 332 is connected to both the second flow channel 32 and the fourth flow channel 34. It can be understood that the first sub-flow channel 331 connects the first flow channel 31 and the second flow channel 32, thereby allowing the coolant in the first flow channel 31 to flow through the first sub-flow channel 331 to the second flow channel 32, and the coolant in the second flow channel 32 to flow through the second sub-flow channel 332 to the fourth flow channel 34, achieving overall coolant flow.

[0082] In this design, the coolant flows in opposite directions in the first channel 31 of the two sets of heat dissipation channels 3, and in opposite directions in the second channel 32 of the two sets of heat dissipation channels 3. This allows the coolant in the first channel 31 of the two sets of heat dissipation channels 3 to exchange heat with different positions of the stator core 1, achieving cooling and improving heat exchange efficiency. Similarly, the coolant in the second channel 32 of the two sets of heat dissipation channels 3 exchanges heat with different positions of the coil winding 5, achieving cooling and improving heat exchange efficiency.

[0083] Optionally, in one embodiment of this disclosure, the first flow channel 31 and the second flow channel 32 both extend along the axial direction of the stator assembly, and the third flow channel 33 extends along the radial direction of the stator assembly.

[0084] In the radial direction of the stator assembly, the first flow channel 31 is close to the outer peripheral wall of the stator core 1, and the second flow channel 32 is close to and connected to the slot 4. The flow directions of the coolant in the first flow channel 31 and the second flow channel 32 of the set of heat dissipation channels 3 are opposite. As a result, the coolant in the set of heat dissipation channels 3 flows in a reverse direction, which can increase the residence time of the coolant in the first flow channel 31 and the second flow channel 32 in the stator core 1, thereby increasing the heat exchange time and heat exchange area and improving the cooling effect. The third flow channel 33 can guide the coolant along the radial direction of the stator assembly, so that the coolant can flow from the first flow channel 31 to the second flow channel 32, and from the second flow channel 32 to the fourth flow channel 34.

[0085] The third flow channel 33 of the two sets of heat dissipation channels 3 are respectively close to the two ends of the stator core 1 in the axial direction of the stator assembly. This arrangement increases the length of the first flow channel 31 and the second flow channel 32, so that the first flow channel 31 and the second flow channel 32 are connected near the ends of the stator core 1 in the axial direction of the stator assembly. This allows the coolant to flow a sufficient distance in the first flow channel 31 and the second flow channel 32, achieving heat exchange with the stator core 1 and the coil winding 5.

[0086] Understandably, in a single set of heat dissipation channels 3, the coolant flows from the middle of the stator core 1, and under the action of the first channel 31, flows along the axis of the stator core 1 from the middle to one end. Then, it flows through the first sub-channel 331 to the second channel 32, where it exchanges heat with the coil winding 5. Under the action of the second channel 32, the coolant flows along the axis of the stator core 1 from one end to the other, and then through the second sub-channel 332 to the fourth channel 34. From there, it is guided to the end of the coil winding 5 for cooling. The flow directions of the coolant in the two sets of heat dissipation channels 3 are mirrored.

[0087] To meet the different manufacturing requirements of the stator core, the arrangement of the second flow channel 32 can be selected as needed. Optionally, in one embodiment of this disclosure, there are multiple slots 4, which are distributed at intervals around the axis of the stator assembly. Each slot 4 has a second flow channel 32 on both sides of the stator assembly in the circumferential direction.

[0088] In some examples, the coolant flows in the same direction in the second flow channels 32 on both sides of the same groove 4, while the coolant flows in opposite directions in the second flow channels 32 on both sides of two adjacent grooves 4.

[0089] In other examples, the coolant flows in opposite directions in the second flow channels 32 on both sides of the same groove 4.

[0090] Optionally, in one embodiment of this disclosure, the stator core 1 includes a plurality of core portions stacked along the axial direction of the stator assembly. Each core portion includes two first core portions 11, and each first core portion 11 includes a first sub-part 111 and a second sub-part 112, which are stacked along the axial direction of the stator assembly. The two first core portions 11 can be configured with a portion of two sets of heat dissipation channels 3 to separately guide the coolant, while the stacked first sub-parts 111 and second sub-parts 112 form a single unit.

[0091] The heat dissipation channel 3 includes a first channel 31 and a third channel 33. The first sub-section 111 includes a plurality of first laminations 1111, which are stacked along the axial direction of the stator assembly. Each first lamination 1111 has a first opening 61, and the first openings 61 of the plurality of first laminations 1111 are interconnected to form the first channel 31. This facilitates the formation of the first channel 31 and allows the coolant in the first channel 31 to flow within the first sub-section 111, achieving direct contact with the first sub-section 111 and thus facilitating heat exchange.

[0092] It is understood that each first lamination 1111 is provided with a first opening 61, which penetrates the corresponding first lamination 1111 along the axial direction of the stator assembly. Thus, when multiple first laminations 1111 are stacked, the first openings 61 of the multiple first laminations 1111 are opposite each other in the axial direction of the stator assembly, thereby realizing the connection of the first openings 61 of the multiple first laminations 1111, and thus forming a first flow channel 31 extending along the axial direction of the stator assembly.

[0093] Optionally, the third flow channel 33 is disposed on the second sub-section 112. After the second sub-section 112 and the first sub-section 111 are stacked, the third flow channel 33 can be connected to the first flow channel 31 formed by connecting multiple first ports 61.

[0094] Alternatively, in one embodiment of this disclosure, the core portion further includes a second core portion 12 and two third core portions 13.

[0095] The second core portion 12 is disposed between the two first core portions 11. The outer diameter of the second core portion 12 is smaller than the outer diameter of the two first core portions 11, so that the second core portion 12 and the two first core portions 11 surround and form a groove 21. The groove 21 is used to cooperate with the outer casing 8 to form a liquid inlet channel 2. The first sub-part 111 is connected to the second core portion 12, and the second sub-part 112 is connected to the third core portion 13. Therefore, it is convenient to form the liquid inlet channel 2 without the need for separate manufacturing, which can reduce costs.

[0096] It is understandable that the second core portion 12 is located between the two first core portions 11. Since the outer diameter of the second core portion 12 is smaller than the outer diameter of the two first core portions 11, a concave groove 21 exists between the two first core portions 11. The bottom of the groove 21 is the outer peripheral wall of the second core portion 12, and the groove wall is the end face of the two first core portions 11. When the entire stator core 1 is assembled into the outer casing 8, the outer casing 8 seals the opening of the groove 21, forming a closed space, which also forms the liquid inlet channel 2, allowing coolant to flow. The outer casing 8 may be provided with a liquid inlet 81, which communicates with the groove 21, allowing coolant to flow from the outside into the liquid inlet channel 2.

[0097] The second core portion 12, the two first core portions 11, and the two third core portions 13 are all provided with through holes 41. The through holes 41 of the second core portion 12, the two first core portions 11, and the two third core portions 13 are interconnected to form a wire groove 4. The through holes 41 of the second core portion 12, the two first core portions 11, and the two third core portions 13 are interconnected in the axial direction of the stator assembly. Therefore, when the second core portion 12, the two first core portions 11, and the two third core portions 13 are stacked, the through holes 41 of the second core portion 12, the two first core portions 11, and the two third core portions 13 are arranged opposite each other, thereby achieving communication and forming a wire groove 4 for winding the coil winding 5.

[0098] The second iron core 12, the two first iron cores 11 and the two third iron cores 13 each have multiple through holes 41, which are spaced apart around the axis of the stator assembly. As a result, the number of wire grooves 4 formed is also multiple, which are spaced apart around the axis of the stator assembly.

[0099] The second core portion 12 may include one third lamination, or multiple third laminations stacked together. The third core portion 13 may include one fourth lamination, or multiple fourth laminations stacked together.

[0100] The two first iron core sections 11 and the two third iron core sections 13 are symmetrically distributed relative to the second iron core section 12 along the axial direction of the stator assembly. The first sub-section 111 serves as a magnetic conductor and is located close to the second iron core section 12, while the second sub-section 112 serves to guide and distribute the coolant.

[0101] Optionally, in one embodiment of this disclosure, the heat dissipation channel 3 includes a second channel 32, and notches 42 are provided on the side edges of the through holes 41 of the second iron core portion 12 and the two first iron core portions 11. The notches 42 of the second iron core portion 12 and the two first iron core portions 11 are interconnected to form the second channel 32.

[0102] In this design, the side edges of the through holes 41 of the second iron core portion 12 and the two first iron core portions 11 are recessed to form a notch 42. In other words, the notch 42 is an extension structure of the through holes 41 of the second iron core portion 12 and the two first iron core portions 11, increasing the width of the through holes 41 in the circumferential direction of the stator assembly. Thus, when the second iron core portion 12 and the two first iron core portions 11 are stacked, the notches 42 of the second iron core portion 12 and the two first iron core portions 11 can communicate with each other to form a second flow channel 32, thereby realizing the flow of coolant.

[0103] Understandably, the side edge of the through hole 41 of the third core portion 13 does not have a notch 42, so the third core portion 13 can produce a blocking effect in the axial direction of the stator assembly, so that the coolant can flow to the fourth flow channel 34.

[0104] Optionally, in one embodiment of this disclosure, the third flow channel 33 includes a second opening 62 formed on the second sub-part 112, and a through hole 41 formed on the second sub-part 112, with the second opening 62 communicating with the through hole 41. The second opening 62 on the second sub-part 112 can be opposite to at least a portion of the first opening 61 on the first lamination 1111, thereby allowing communication between the second opening 62 and the first opening 61, enabling coolant flow, and thus communication between the first flow channel 31 and the third flow channel 33, thereby guiding the coolant in the first flow channel 31 to the through hole 41. It is understood that the second opening 62 communicates with a notch 42 on the side edge of the through hole 41, thus enabling communication between the third flow channel 33 and the second flow channel 32.

[0105] The second sub-part 112 may include a second lamination, on which a second opening 62 is formed, extending through the axis of the stator assembly. The number of second laminations may be one or more, stacked together.

[0106] The heat dissipation channel 3 further includes a second channel 32 and a fourth channel 34. The second port 62 includes a first sub-port 621 and a second sub-port 622. The first sub-port 621 is connected to the first channel 31 and the second channel 32, and the second sub-port 622 is connected to the second channel 32 and the fourth channel 34. Both the first sub-port 621 and the second sub-port 622 are connected to the notch 42 on the side edge of the through hole 41, thus guiding the coolant flow. This allows for the connection between the first channel 31 and the second channel 32, and between the second channel 32 and the fourth channel 34, respectively.

[0107] Optionally, in one embodiment of this disclosure, notches 42 are provided on both sides of the through hole 41 of the second sub-part 112. The first sub-port 621 and the second sub-port 622 are respectively connected to the notches 42 on both sides of the through hole 41, so that the coolant can flow through the first sub-port 621 to the notch 42 on one side of the through hole 41, and the coolant can flow through the notch 42 on the other side of the through hole 41 to the second sub-port 622. This facilitates the flow of coolant from the first sub-port 621 into the wire groove 4, while the coolant in the wire groove 4 can flow out through the second sub-port 622, without affecting the flow of coolant in the wire groove 4, ensuring heat exchange between the coolant and the coil winding 5. It is understood that the flow direction of the coolant in the second flow channels 32 on both sides of the same wire groove 4 is opposite.

[0108] Optionally, in one embodiment of this disclosure, the first sub-port 621 includes a first segment 6211 and a second segment 6212, which are interconnected. The first segment 6211 is connected to a notch 42 on one side of the corresponding through hole 41. Both the first segment 6211 and the second segment 6212 are used to guide the coolant in the first flow channel 31 to the groove 4.

[0109] Each first sub-section 111 is provided with multiple first ports 61, which are distributed at intervals around the axis of the stator assembly. The two first segments 6211 of two adjacent first ports 621 are connected to one first port 61 of a first sub-section 111 near the second sub-section 112, and the two second segments 6212 of two adjacent first ports 621 are connected to another first port 61 of a first sub-section 111 near the second sub-section 112. This arrangement increases the flow rate of the coolant, thereby increasing the heat exchange area and improving the cooling efficiency.

[0110] It is understandable that one first port 61 of a first sub-part 111 corresponds to two first segments 6211, and the other first port 61 of a first sub-part 111 corresponds to two second segments 6212. This increases the number of first ports 61, thereby increasing the coolant flow rate, while the arrangement of the first segments 6211 and the second segments 6212 ensures that the coolant in the first flow channel 31 flows to the second flow channel 32.

[0111] Alternatively, in another embodiment of this disclosure, the first sub-port 621 is configured as a strip extending in the radial direction of the stator assembly. There are multiple first sub-ports 621, and each first sub-part 111 is provided with multiple first ports 61. The multiple first ports 61 are distributed at intervals around the axis of the stator assembly, and the first ports 61 correspond one-to-one with the first sub-ports 621.

[0112] Optionally, in one embodiment of this disclosure, the second sub-part 112 has a plurality of through holes 41 and a plurality of second openings 62, with each second opening 62 corresponding one-to-one with a through hole 41 in the second sub-part 112. Thus, each second opening 62 can guide coolant to its corresponding through hole 41, and the coolant in the corresponding through hole 41 can be guided to the second opening 62.

[0113] In the axial direction of the stator assembly, the two second sub-sections 112 are staggered, such that the first port 621 of one second sub-section 112 is opposite to the second port 622 of the other second sub-section 112. This ensures that the coolant from the two sets of heat dissipation channels 3 flows into the same groove 4 without interfering with each other, thus avoiding affecting the flow of the coolant.

[0114] Understandably, after the two second sub-parts 112 are connected to the two first sub-parts 111, the two second sub-parts 112 are offset by an angle of one through hole 41. That is, the notch 42 of one second sub-part 112 connected to the first port 621 and the notch 42 of the other second sub-part 112 connected to the second port 622 are opposite to each other and interconnected. Thus, the flow direction of the coolant in one set of heat dissipation channels 3 is from the first port 621 of one second sub-part 112 to the notch 42, then along the axis of the stator assembly to the other second sub-part 112, and then through the notch 42 of the other second sub-part 112 to the second port 622. The flow direction of the coolant in the other set of heat dissipation channels 3 is mirror flow. Therefore, the flow direction of the coolant on both sides of each groove 4 is opposite.

[0115] Optionally, in another embodiment of this disclosure, notches 42 are provided on both sides of the through hole 41 of the second sub-part 112, and two first sub-ports 621 or two second sub-ports 622 are provided on both sides of the through hole 41, respectively communicating with the notches 42 on both sides. Thus, the flow direction of the coolant in the second flow channels 32 on both sides of the same groove 4 is consistent.

[0116] The second sub-section 112 has multiple through holes 41, which are spaced apart around the axis of the stator assembly. In two adjacent through holes 41 of the second sub-section 112, one through hole 41 has two first sub-ports 621 on both sides, and the other through hole 41 has two second sub-ports 622 on both sides. Therefore, the coolant flows in opposite directions in the second flow channels 32 on both sides of two adjacent grooves 4.

[0117] Understandably, the structures on both sides of each through hole 41 are consistent, which reduces the complexity of the second sub-section 112, simplifies the overall structure of the stator core, and thus reduces costs.

[0118] Optionally, in another embodiment of this disclosure, each first sub-part 111 is provided with a plurality of first ports 61, which are spaced apart around the axis of the stator assembly, and a first sub-port 621 communicates with a first port 61. This achieves communication between the first flow channel 31 and the third flow channel 33, and further achieves communication between the first flow channel 31 and the second flow channel 32.

[0119] Optionally, in another embodiment of this disclosure, the two second sub-parts 112 are staggered along the axial direction of the stator assembly, such that the through hole 41 with the first sub-port 621 in one second sub-part 112 is opposite to the through hole 41 with the second sub-port 622 in the other second sub-part 112. This allows for the separate flow of coolant in two sets of heat dissipation channels, facilitating heat exchange. It is understood that the notches on both sides of the through hole 41 with the first sub-port 621 in one second sub-part 112 form a second flow channel 32 for one set of heat dissipation channels, and the notches on both sides of the through hole 41 with the second sub-port 622 in the other second sub-part 112 form a second flow channel 32 for another set of heat dissipation channels. Therefore, the flow directions of the second flow channels 32 on both sides of two adjacent slots 4 are opposite, while the flow directions of the second flow channels 32 on both sides of a single slot 4 are consistent.

[0120] Optionally, in one embodiment of this disclosure, the heat dissipation channel 3 includes a fourth channel 34, which is configured as a third port 63 formed on the third iron core portion 13. The second sub-port 622 can communicate with the third port 63 to realize the flow of coolant.

[0121] The third port 63 penetrates the third iron core 13 in the axial direction of the stator assembly, so that after the third iron core 13 is connected to the second sub-part 112, the coolant flows out through the third port 63 and can be sprayed toward the end of the coil winding 5 in the axial direction of the stator assembly, thereby achieving heat dissipation at the end of the coil winding 5 in the axial direction of the stator assembly.

[0122] The stator assembly has multiple third ports 63, which are spaced apart around its axis. Each pair of adjacent second ports 622 is connected to a third port 63. This arrangement increases the coolant flow rate, thereby increasing the heat exchange area and improving cooling efficiency.

[0123] Optionally, in one embodiment of this disclosure, the insulating element 7 may be insulating paper, and the slot of the insulating element 7 in the axial direction of the stator assembly may be partially foamed to produce a sealing effect, thereby sealing the gap between the slot of the wire groove 4 in the axial direction of the stator assembly and the coil winding 5.

[0124] Optionally, in one embodiment of this disclosure, the insulating member 7 is provided with an opening 71 in a portion of the wire groove 4. The opening 71 is used for the flow of coolant so that the coolant in the wire groove 4 can directly contact the coil winding 5 to achieve heat exchange.

[0125] Optionally, in one embodiment of this disclosure, the insulating member 7 is insulating paper. The circumferential edges of both ends of the insulating member 7 along the axial direction of the stator assembly are configured to foam and form foamed portions 72. A portion of the insulating member 7 extending along the axial direction of the stator assembly is also configured to foam and form foamed portions 72, causing a portion of the insulating member 7 to bulge. The outer wall of this portion of the insulating member 7 is connected to the stator core 1, and the inner wall of this portion of the insulating member 7 is connected to the coil winding 5. This configuration creates a sealing effect while preventing obstruction of the opening 71, ensuring contact between the coolant and the coil winding 5, and preventing coolant leakage. It is understood that the foamed portions 72 can be annular or strip-shaped. The foamed portions 72 can exert a pushing effect on the coil winding 5, fixing the coil winding 5 within the slot, preventing the coil winding 5 from shaking, and simultaneously creating a sealing effect.

[0126] Alternatively, in one embodiment of this disclosure, the stator assembly further includes a housing 8, and the stator core 1 is assembled inside the housing 8.

[0127] This stator assembly can simultaneously make direct contact with both the stator core 1 and a portion of the coil winding 5 located within the slot 4, as well as a portion of the coil winding 5 located outside the slot 4, for cooling and heat dissipation. It features a large heat exchange area, high heat exchange efficiency, a long coolant flow path, and a long heat exchange time, thereby improving the overall cooling and heat dissipation effect. Furthermore, the magnetic circuit remains intact in most areas of the stator core 1, preserving its magnetic properties and ensuring the performance of the stator assembly, which in turn guarantees the performance of the motor.

[0128] In addition, since the coolant enters through the middle of this stator assembly, there is no need to set up closed rings, end rings or other structures at both ends of the stator core 1, which simplifies the structure and reduces costs.

[0129] A second aspect of this disclosure also provides an electric motor including the stator assembly described above.

[0130] A third aspect of this disclosure also provides a vehicle including the aforementioned stator assembly or the aforementioned motor.

[0131] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0132] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0133] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A stator assembly, characterized in that, include: Coil winding; A stator core, on which the coil winding is wound, the stator core is provided with slots, a portion of the coil winding is disposed in the slots, the stator core is provided with a liquid inlet channel and a heat dissipation channel, one end of the heat dissipation channel is connected to the liquid inlet channel so that the coolant in the liquid inlet channel can flow to the heat dissipation channel, the heat dissipation channel is used to guide the coolant to the stator core and the slots so that the coolant in the heat dissipation channel can exchange heat with the stator core and the coil winding, the other end of the heat dissipation channel is disposed at the end of the stator core in the axial direction of the stator assembly so that the coolant flowing out of the heat dissipation channel can flow to the end of the coil winding in the axial direction of the stator assembly; An insulating element is connected to the coil winding, a portion of which is connected to the end of the stator core in the axial direction of the stator assembly to close the gap between the slot opening of the wire groove in the axial direction of the stator assembly and the coil winding, and to restrict the flow of coolant from the slot opening of the wire groove.

2. The stator assembly according to claim 1, characterized in that, The number of heat dissipation channels is two sets, and both sets of heat dissipation channels are connected to the liquid inlet channel. The coolant flowing in the two sets of heat dissipation channels flows in opposite directions at least in some positions.

3. The stator assembly according to claim 2, characterized in that, Each heat dissipation channel group includes a first channel, a second channel, a third channel, and a fourth channel; The first flow channel is connected to the liquid inlet flow channel, and one end of the fourth flow channel is disposed on the end face of the stator core in the axial direction of the stator assembly to guide the coolant out of the stator core. The third flow channel includes a first sub-flow channel and a second sub-flow channel. The first sub-flow channel is connected to the first flow channel and the second flow channel respectively, and the second sub-flow channel is connected to the second flow channel and the fourth flow channel respectively. In the radial direction of the stator assembly, the first flow channel is close to the outer peripheral wall of the stator core, and the second flow channel is close to the slot and communicates with the slot.

4. The stator assembly according to claim 3, characterized in that, The first flow channel and the second flow channel both extend along the axial direction of the stator assembly, and the third flow channel extends along the radial direction of the stator assembly; The coolant flows in opposite directions in the first channel of the two sets of heat dissipation channels, the coolant flows in opposite directions in the second channel of the two sets of heat dissipation channels, and the coolant flows in opposite directions in the first channel and the second channel of one set of heat dissipation channels. The third channel of each of the two sets of heat dissipation channels is located close to both ends of the stator core in the axial direction of the stator assembly.

5. The stator assembly according to claim 4, characterized in that, The number of grooves is multiple, and they are distributed at intervals around the axis of the stator assembly. Each groove has a second flow channel on both sides of the stator assembly in the circumferential direction. Wherein, the flow direction of the coolant in the second flow channels on both sides of the same groove is the same, and the flow direction of the coolant in the second flow channels on both sides of two adjacent grooves is opposite; or, The coolant flows in opposite directions in the second flow channels on both sides of the same groove.

6. The stator assembly according to claim 1, characterized in that, The stator core includes a plurality of core portions stacked in the axial direction of the stator assembly; The core section includes two first core sections, each of which includes a first sub-section and a second sub-section. The first sub-section and the second sub-section are stacked in the axial direction of the stator assembly. The heat dissipation channel includes a first channel and a third channel. The first sub-part includes a plurality of first laminations. The plurality of first laminations are stacked in the axial direction of the stator assembly. Each first lamination is provided with a first opening. The first openings of the plurality of first laminations are interconnected to form the first channel. The third flow channel is located in the second sub-section.

7. The stator assembly according to claim 6, characterized in that, The third flow channel includes a second opening formed in the second sub-part, the second sub-part having a through hole, and the second opening communicating with the through hole; The heat dissipation channel further includes a second channel and a fourth channel. The second port includes a first sub-port and a second sub-port. The first sub-port is connected to the first channel and the second channel, and the second sub-port is connected to the second channel and the fourth channel.

8. The stator assembly according to claim 7, characterized in that, The second sub-part has notches on both sides of the through hole. The first sub-port and the second sub-port are respectively connected to the notches on both sides of the through hole, so that the flow direction of the coolant in the second flow channel on both sides of the same groove is opposite.

9. The stator assembly according to claim 8, characterized in that, The first sub-port includes a first segment and a second segment, which are interconnected. The first segment is connected to the notch on one side of the corresponding through hole. Each of the first sub-parts is provided with a plurality of first ports, which are distributed at intervals around the axis of the stator assembly. The two first segments of two adjacent first sub-ports are connected to one first port of a first sub-part near the second sub-part, and the two second segments of two adjacent first sub-ports are connected to another first port of a first sub-part near the second sub-part.

10. The stator assembly according to claim 7, characterized in that, The second sub-part has multiple through holes and multiple second openings, with each second opening corresponding to one of the through holes in the second sub-part. In the axial direction of the stator assembly, the two second sub-parts are staggered, such that the first sub-port of one of the two second sub-parts is opposite to the second sub-port of the other second sub-part.

11. The stator assembly according to claim 7, characterized in that, The second sub-part has notches on both sides of the through hole, and two first sub-ports or two second sub-ports are provided on both sides of the through hole, which are respectively connected to the notches on both sides, so that the flow direction of the coolant in the second flow channel on both sides of the same groove is consistent. The second sub-part has multiple through holes, which are distributed at intervals around the axis of the stator assembly. In the second sub-part, two first sub-ports are provided on both sides of one of the two through holes, and two second sub-ports are provided on both sides of the other through hole, so that the flow direction of the coolant in the second flow channel on both sides of the two adjacent grooves is opposite.

12. The stator assembly according to claim 11, characterized in that, Each of the first sub-parts is provided with a plurality of first ports, which are distributed at intervals around the axis of the stator assembly, and one first sub-port is connected to another first port.

13. The stator assembly according to claim 11, characterized in that, In the axial direction of the stator assembly, the two second sub-parts are staggered, such that the through hole of the first sub-port in one of the two second sub-parts is opposite to the through hole of the second sub-port in the other second sub-part.

14. The stator assembly according to claim 6, characterized in that, The core section also includes a second core section and two third core sections; The second iron core is disposed between the two first iron cores. The outer diameter of the second iron core is smaller than the outer diameter of the two first iron cores, so that the second iron core and the two first iron cores surround to form a groove. The groove is used to cooperate with the outer shell to form the liquid inlet channel. The first sub-part is connected to the second iron core, and the second sub-part is connected to the third iron core. The second iron core portion, the two first iron core portions, and the two third iron core portions are all provided with through holes, and the through holes of the second iron core portion, the two first iron core portions, and the two third iron core portions are interconnected to form the wire groove.

15. The stator assembly according to claim 14, characterized in that, The heat dissipation channel includes a second channel, and notches are provided on the side edges of the through holes of the second iron core and the two first iron cores. The notches of the second iron core and the two first iron cores are interconnected to form the second channel.

16. The stator assembly according to claim 14, characterized in that, The heat dissipation channel includes a fourth channel, which is configured as a third opening formed in the third iron core portion.

17. The stator assembly according to claim 1, characterized in that, The insulating element has an opening in a portion of the groove for the flow of coolant, so that the coolant in the groove can contact the coil winding.

18. The stator assembly according to claim 17, characterized in that, The insulating component is insulating paper; Wherein, the circumferential edges of both ends of the insulating member in the axial direction of the stator assembly are configured to be foamed and form foamed portions, and a portion of the insulating member extending along the axial direction of the stator assembly is configured to be foamed and form foamed portions, so that a portion of the insulating member bulges, the outer wall of a portion of the insulating member is connected to the stator core, and the inner wall of a portion of the insulating member is connected to the coil winding.

19. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 1-18.

20. A vehicle, characterized in that, It includes the stator assembly as described in any one of claims 1-18, or the motor as described in claim 19.

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