An electric machine, powertrain, and vehicle

Abstract

The embodiment of the application provides a motor, a power assembly and a vehicle, the motor comprises a stator core and a winding structure wound thereon, further comprises a first injection structure, the first injection structure comprises a first injection part and a plurality of first busbars, the first busbar comprises a first main body part and a first electrical connector, the first electrical connector of each first busbar is respectively connected to a first outgoing terminal of each phase winding structure, and the first injection part is arranged to wrap the first main body part of the first busbar to fix the first busbar. An insulating cover plate is arranged on the first injection structure, the insulating cover plate covers the exposed first electrical connector and the first outgoing terminal, the electrical gap and the creepage distance between the first electrical connector, the first outgoing terminal, the motor end cover and the shell are increased, the insulation safety of the motor is improved, and the miniaturization design of the motor is facilitated.

Description

Technical Field

[0001] This application relates to the field of electric motor technology, and in particular to an electric motor, powertrain, and vehicle. Background Technology

[0002] In recent years, flat-wire motors have been increasingly used in the field of new energy vehicles. Flat-wire motors offer advantages such as high copper fill factor, improved heat dissipation in the motor windings, enhanced winding withstand voltage, and reduced winding end length, thereby increasing the motor's torque density and power density. Therefore, flat-wire motors have promising application prospects in new energy electric vehicles.

[0003] The motor includes a stator, which comprises a stator core and winding structures wound around the stator core. The winding structure can be a multi-phase winding structure; taking a three-phase motor as an example, the winding structure can include a U-phase winding structure, a V-phase winding structure, and a W-phase winding structure. The output terminals of the three-phase winding structure can be connected to lead-out copper busbars, for example, corresponding to U-phase lead-out copper busbars, V-phase lead-out copper busbars, and W-phase lead-out copper busbars respectively. Each end of the lead-out copper busbar has a solder joint and a welding surface. The lead-out copper busbars are connected to the winding structure through the solder joints and to terminals through the welding surfaces, enabling connection to control components of the vehicle's powertrain, etc. To enhance insulation and fix the lead-out copper busbars, the U-phase, V-phase, and W-phase lead-out copper busbars can be spaced apart and injection molded into a single structure, with the solder joints and welding surfaces exposed outside the injection molded part for connection.

[0004] However, exposed solder joints reduce the insulation safety of the motor. To meet the insulation safety distance requirements of the motor, the distance between the solder joints and the motor housing is relatively large, resulting in a larger motor size. Summary of the Invention

[0005] This application provides an electric motor, a powertrain, and a vehicle. The electric motor has high insulation safety and effectively reduces the size of the motor while meeting the insulation safety distance requirements, which is conducive to the miniaturization of the motor.

[0006] The first aspect of this application provides an electric motor, including a stator core and a multi-phase winding structure wound on the stator core, each phase winding structure including a first lead-out terminal, the first lead-out terminal of each phase winding structure being connected to a lead-out terminal of the same phase winding structure.

[0007] The motor also includes a first injection-molded structure, which comprises a first injection-molded part and multiple first busbars. Each first busbar includes a first main body and a first electrical connector. The first injection-molded part encloses the first main body of the multiple first busbars to fix them in place. The multiple first busbars are spaced apart circumferentially along the winding structure. The first electrical connector of each first busbar is electrically connected to the first output terminal of each phase winding structure. This allows for electrical connection between the winding structure and control units such as the powertrain through the first busbars, enabling control of the motor's energization. The first injection-molded part serves to fix the first busbars, improving their stability, reducing or preventing movement caused by vibration during assembly and operation, ensuring motor performance, and maintaining a stable insulation distance between the first busbars.

[0008] Furthermore, the first injection molded part encapsulates the first main body of multiple spaced first busbars. The first main body of two adjacent first busbars connected by different phase winding structures is filled with an insulating first injection molded part, which can enhance the insulation effect between adjacent first busbars, improve the insulation safety of the first busbars, and meet the insulation safety distance requirements of high-voltage motors.

[0009] The motor also includes an insulating cover plate, which is disposed on the first injection-molded structure. The insulating cover plate covers the first electrical connector and the first lead-out terminal, ideally completely covering the side of the first electrical connector and the first lead-out terminal facing away from the stator core. There are no exposed first electrical connectors or first lead-out terminals on the axial end faces of the stator. Thus, in the motor, the first electrical connector and the first lead-out terminal each have an insulating cover plate between themselves and the end cover. The insulating cover plate acts as a barrier, increasing the electrical clearance and creepage distance between the first electrical connector and the first lead-out terminal and the end cover, effectively improving the insulation safety between the first electrical connector, the first lead-out terminal, and the end cover, and better meeting the insulation safety distance requirements of high-voltage motors. Furthermore, it helps to reduce the length of the insulation distance between the first electrical connector, the first lead-out terminal, and the end cover, saving axial end space of the motor, reducing the axial size of the motor, and facilitating miniaturization design.

[0010] The insulating cover can also completely cover the side of the first electrical connector and the first lead terminal facing away from the stator core axis, leaving no exposed first electrical connector on the outer circumferential surface of the stator. In this way, the first electrical connector and the first lead terminal in the motor have insulating covers that act as barriers between them and the housing, increasing the electrical clearance and creepage distance between them and the housing, effectively improving the motor's insulation safety. Furthermore, it helps to reduce the length of the insulation distance between the first electrical connector and the first lead terminal and the housing, reducing the circumferential dimensions of the motor and further facilitating miniaturization design.

[0011] In one possible implementation, each phase winding structure further includes a second output terminal, which is connected to the neutral line of the same phase winding structure.

[0012] It also includes a second busbar, which includes multiple connection ends. The multiple connection ends are arranged circumferentially along the winding structure. Each connection end has a second electrical connector. The second electrical connector on each connection end is respectively connected to the second output terminal of each phase winding structure, so that the electrical connection of the neutral point between the multi-phase winding structures can be realized through the second busbar.

[0013] An insulating cover plate covers the second electrical connector and the second lead-out terminal. Ideally, it should completely cover the side of the second electrical connector and the second lead-out terminal facing away from the stator core, leaving no exposed second electrical connector or lead-out terminal on the axial end face of the stator. This arrangement also provides insulating covers between the second electrical connector and the second lead-out terminal and the end cover, acting as a barrier and increasing the electrical clearance and creepage distance between them. This further enhances the insulation safety of the motor. While meeting the high insulation safety distance requirements of high-voltage motors, it also saves axial end space, enabling miniaturized motor design.

[0014] The insulating cover can also completely cover the side of the second electrical connector and the second lead terminal facing away from the stator core axis, leaving no exposed second electrical connector and second lead terminal on the outer circumferential surface of the stator. This arrangement of insulating covers between the second electrical connector and the housing increases the insulation safety between them and the housing, further enhancing the motor's insulation safety. While meeting the high insulation safety distance requirements of high-voltage motors, this design further reduces the circumferential dimensions of the motor, facilitating miniaturization.

[0015] In one possible implementation, the insulating cover includes a top plate and a side plate. The top plate is located on the side of the first injection-molded structure facing away from the stator core, and the side plate is located on the side of the first injection-molded structure facing away from the stator core axis. The side plate is connected to the top plate, and the side plate and top plate enclose an accommodating space. The first electrical connector, the first lead-out terminal, the second electrical connector, and the second lead-out terminal are located within the accommodating space. This provides excellent insulation and separation, giving the motor better insulation safety and facilitating motor miniaturization.

[0016] In one possible implementation, one end of the multiphase winding structure along the axial direction is the connection end, and the first and second outgoing ends are located on the outer side of the connection end along the axial direction, respectively.

[0017] The first injection-molded structure is located on the outer side of the connection end along the axial direction, and the second busbar is located on the outer peripheral side of the connection end. The first electrical connector, the first output terminal, the second electrical connector, and the second output terminal are distributed in the circumferential direction. The second output terminal of each phase winding structure, the second electrical connector corresponding to the second output terminal, are arranged adjacent to the first output terminal of the phase winding structure and the first electrical connector corresponding to the first output terminal, which helps to ensure the insulation safety of the motor.

[0018] In one possible implementation, the top plate has multiple isolation slots on the side facing the first injection molded part. The first and second leads of the same-phase winding structure, as well as the first and second electrical connectors respectively connected to the first and second leads, are located in one isolation slot. That is, the first and second leads of different-phase winding structures, as well as the corresponding first and second electrical connectors, are located in different isolation slots, increasing the electrical clearance and creepage distance between different-phase winding structures and between the corresponding first and second electrical connectors of different-phase windings, further improving the insulation safety of the motor.

[0019] In one possible implementation, a baffle is provided within the isolation slot, dividing the isolation slot into a first partition slot and a second partition slot. The first lead-out terminal and the first electrical connector are located in the first partition slot, while the second lead-out terminal and the second electrical connector are located in the second partition slot. The baffle can isolate and insulate the first lead-out terminal and its connected first electrical connector from the second lead-out terminal and its connected second electrical connector within the same-phase winding structure. This increases the electrical clearance and creepage distance between the first lead-out terminal and its first electrical connector and the second lead-out terminal and its second electrical connector within the same-phase winding structure, further improving the insulation safety of the motor.

[0020] In one possible implementation, the insulating cover further includes end plates located on both sides of the top and side plates along the circumferential direction, and connected to the top and side plates respectively. This increases the strength of the insulating cover and ensures its insulation stability. Furthermore, the end plates shield the circumferential sides of the first injection-molded structure, further enclosing the accommodating space, which helps to increase the creepage distance between the first and second electrical connectors and other metal structural components in the motor, thus improving the insulation safety of the motor.

[0021] In one possible implementation, the top plate is detachably connected to the first injection molded part, which facilitates the removal and installation of the insulating cover, simplifies the assembly process, and improves installation efficiency.

[0022] In one possible implementation, a first snap-fit ​​structure is provided on the top plate, and a second snap-fit ​​structure is provided on the first injection molded part. The top plate and the first injection molded part are connected by the first snap-fit ​​structure and the second snap-fit ​​structure. That is, the insulating cover plate is connected to the first injection molded structure by snap-fit, which is convenient for installation and disassembly and has high manufacturability.

[0023] In one possible implementation, the top plate has a raised first and second locking wall on the side facing the first injection molded part, with a clearance gap between them. The opposing side surfaces of the first and second locking walls have protrusions to form a first locking structure. The outer periphery of the first injection molded part has a raised locking portion, and the opposing side surfaces of the locking portion have grooves to form a second locking structure. The first and second locking walls can deform under external force, facilitating the engagement of the first locking structure on the first and second locking walls with the second locking structure on the locking portion, thus making disassembly or assembly easier and further improving assembly efficiency.

[0024] In one possible implementation, the first snap-fit ​​structure is located on the first snap-fit ​​wall and the second snap-fit ​​wall at the ends facing away from the top plate, and the second snap-fit ​​structure is located on the snap-fit ​​part at the ends facing away from the top plate. The snap-fit ​​part is located within the clearance gap, which helps to enhance the snap-fit ​​strength of the first snap-fit ​​structure and the second snap-fit ​​structure, thereby enhancing the assembly firmness of the first injection molded part and the insulating cover plate and ensuring the stability of the insulation.

[0025] In one possible implementation, the two opposing sides of the snap-fit ​​portion also have guide ramps. These guide ramps are located on the side of the second snap-fit ​​structure facing away from the stator core, extending from the end of the snap-fit ​​portion facing the top plate to the end facing away from the top plate. The two guide ramps are inclined in opposite directions. The two guide ramps can be in a V-shape, with the guide ramps located on the side of the second snap-fit ​​structure facing away from the stator core. This allows the first snap-fit ​​structure of the insulating cover plate to engage with the second snap-fit ​​structure after passing through the guide ramps. The guide ramps provide excellent guidance, facilitating assembly.

[0026] In one possible implementation, a first positioning structure is also provided on the top plate, and a second positioning structure that cooperates with the first positioning structure is provided on the first injection molded part. The first and second positioning structures cooperate to provide positioning, so as to facilitate accurate assembly between the insulating cover plate and the first injection molded structure, which helps to improve assembly efficiency.

[0027] In one possible implementation, the insulating cover also includes reinforcing members connected to the top plate and side plate respectively to increase the strength of the insulating cover and ensure its insulation stability.

[0028] In one possible implementation, a second injection molding structure is also included, comprising a temperature sensor, a second injection molded part, and a second busbar. The second busbar further includes a second main body, on which multiple connecting ends are disposed. The temperature sensor is attached to one side of the second main body, and the heat generated by the operation of the stator and winding structure can be transferred to the second busbar and the temperature sensor to detect the stator temperature.

[0029] The second injection-molded part encloses the temperature sensor and the second main body. This second part isolates and protects the temperature sensor, effectively preventing direct contact between the coolant and the sensor, reducing the coolant's impact on the sensor, thereby minimizing feedback delay and improving detection accuracy. This achieves low delay and high precision while enabling stator temperature detection.

[0030] In one possible implementation, the second busbar includes a heat-conducting element disposed on one side of the second main body. The heat-conducting element and one side of the second main body form a receiving cavity, and the temperature sensor is located within the receiving cavity, with the temperature sensor in contact with at least one side of the heat-conducting element. On one hand, the heat-conducting element can accommodate and fix the temperature sensor, thus securing it to the second busbar. On the other hand, by ensuring the temperature sensor is in contact with at least one side of the heat-conducting element, heat from the second busbar can also be transferred to the temperature sensor through the heat-conducting element, increasing the heat transfer area between the temperature sensor and the second busbar, further reducing the feedback delay of temperature detection, and improving detection accuracy.

[0031] In one possible implementation, the heat-conducting component includes a connected bottom surface and a side surface. The bottom surface is connected to the second main body, and the side surface is opposite to the second main body. The bottom surface, the side surface, and one side of the second main body together form a receiving cavity. The temperature sensor is attached to the bottom surface and the side surface respectively, so that the temperature sensor can better fit with the heat-conducting component, has a larger thermal contact area, and achieves the purpose of small feedback delay and high detection accuracy.

[0032] In one possible implementation, the accommodating cavity includes a first opening, with one end of the side facing away from the bottom surface forming the first opening between it and the second main body. The temperature sensor is inserted into the accommodating cavity through the first opening. This allows the temperature sensor to be inserted into the accommodating cavity, facilitating assembly or disassembly.

[0033] In one possible implementation, the heat-conducting component includes a bottom surface, a side surface, and a top surface connected in sequence. The bottom surface is connected to the second main body, the side surface is opposite to the second main body, and the top surface extends toward the second main body at one end away from the side surface. The bottom surface, side surface, top surface, and one side of the second main body together form a receiving cavity. The temperature sensor is attached to the bottom surface, side surface, and top surface respectively, further increasing the contact area between the temperature sensor and the heat-conducting component, thereby further reducing the feedback delay of temperature detection and improving the accuracy of detection.

[0034] In one possible implementation, the accommodating cavity has a first cavity and a second cavity, and the temperature sensor is inserted into the accommodating cavity through the first cavity to realize the insertion and assembly of the temperature sensor, which facilitates assembly and disassembly.

[0035] In one possible implementation, the heat-conducting component also includes a spring-loaded structure. The spring-loaded structure comprises a fixed end and an elastic end. The fixed end is connected to the heat-conducting component, and the elastic end is located on one side of the fixed end along the insertion direction of the temperature sensor. The first end of the elastic end is connected to the fixed end, and the second end of the elastic end extends into the receiving cavity. The temperature sensor has a insertion slot for engaging with the spring-loaded structure, and the elastic end is inserted into the insertion slot. Inserting the temperature sensor into the first cavity opening compresses the elastic end, enabling insertion. Inserting the temperature sensor into the receiving cavity allows the elastic end to be inserted into the insertion slot. The engagement of the elastic end and the insertion slot secures the temperature sensor, and the rebound force of the elastic end also acts on the temperature sensor, pressing it firmly and allowing for better contact between the temperature sensor and the first main body.

[0036] In one possible implementation, the first injection-molded structure further includes a temperature sensor, which is attached to one side of the first main body. The first injection-molded part encloses the temperature sensor and the first main body. The first injection-molded part also serves to isolate and protect the temperature sensor, reducing the influence of the cooling liquid on the temperature sensor, and achieving low-delay and high-precision temperature detection under the condition of stator temperature detection.

[0037] In one possible implementation, a third injection molding structure is also included. This third injection molding structure comprises a temperature sensor, a third injection molded part, and a first lead-out terminal. The temperature sensor is fitted onto one side of the first lead-out terminal, and the third injection molded part encloses the temperature sensor and part of the first lead-out terminal. This also serves to protect the temperature sensor, achieving low latency and high accuracy while still enabling stator temperature detection.

[0038] In one possible implementation, the first busbar further includes a first end and a second end, the first end being provided with a first electrical connector and the second end having an electrical connection surface.

[0039] It also includes multiple terminals, each terminal including a first connecting part, a second connecting part and a bendable body part. The first connecting part and the second connecting part are located at both ends of the body part. The first connecting part is electrically connected to the electrical connection surface, thereby realizing the connection between the winding structure and the terminal, so that the winding structure can be electrically connected to the control unit, etc. through the terminal.

[0040] The bendable body can be bent to avoid obstacles during assembly. For example, when assembling end caps and oil injection rings, the body can be bent to be in a vertical position (parallel to the stator core axis) to avoid obstacles and facilitate the assembly of end caps, etc. After assembly, the body can be bent to form a bent structure to facilitate connection with the first busbar and control unit.

[0041] In one possible implementation, the extension direction of the first connection is parallel to the axial direction of the stator core, which facilitates the electrical connection between the first connection and the first busbar, and the extension direction of the second connection is parallel to the radial direction of the winding structure, which facilitates the electrical connection between the second connection and the control unit, etc.

[0042] The main body has a bent structure, and on the axial direction of the stator core, the end of the bent structure facing away from the stator core is higher than the height of the second connecting part from the stator core. This gives the bent structure a larger bending and adjustment space, which in turn gives the second connecting part greater adjustment flexibility. This facilitates the alignment of the second connecting part with the control unit to achieve electrical connection, and reduces the difficulty of assembling terminals and control units.

[0043] In one possible implementation, multiple stator slots are provided on the stator core, and the multiple stator slots are spaced apart along the circumference of the stator core. The winding structure is wound on the stator slots, and an insulating component is provided between the winding structure and the inner wall of the stator slot. The insulating component serves to insulate and isolate the winding structure and the stator core to ensure the insulation safety of the motor.

[0044] In one possible implementation, the insulating element is arranged around the sidewall of the stator slot, and the first and last ends of the insulating element along the surrounding direction at least partially overlap to form an overlap structure, which helps to improve the electrical clearance and creepage distance between the winding structure and the stator core, thereby improving the insulation safety of the motor.

[0045] The stator slots have expanded space to accommodate overlapping structures. In other words, the stator slots have specifically added expanded space to accommodate overlapping structures. This allows for the accommodation of overlapping structures with larger dimensions and thicknesses, which in turn increases the overlapping area between the first and last ends of the insulation components. This further improves the insulation safety of the motor and meets the insulation safety requirements of high-voltage motors.

[0046] A second aspect of this application provides a powertrain including a reduction gear and any of the aforementioned motors, wherein the motor is connected to the reduction gear.

[0047] A third aspect of this application provides a vehicle including a vehicle body and any of the aforementioned motors, the motors being mounted on the vehicle body. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the stator structure in an electric motor provided in an embodiment of this application;

[0049] Figure 2 This application provides an assembly diagram of the stator core and winding structure in an electric motor, as shown in the embodiments of the present application.

[0050] Figure 3 for Figure 2 Enlarged view of a local structure in section B;

[0051] Figure 4 This is a schematic diagram of the structure of a first busbar in a motor provided in an embodiment of this application;

[0052] Figure 5 This is an assembly diagram of a first injection-molded structure in an electric motor provided in an embodiment of this application;

[0053] Figure 6 This application provides an assembly diagram of a stator core, winding structure, and first injection-molded structure in an electric motor, as shown in the embodiments of this application.

[0054] Figure 7 This is a top view of the stator structure in an electric motor, provided as an embodiment of this application.

[0055] Figure 8 for Figure 1 Enlarged view of a portion of the structure in section A;

[0056] Figure 9 A partially disassembled schematic diagram of the stator core, first injection-molded structure, and insulating cover plate in an electric motor, provided for an embodiment of this application;

[0057] Figure 10 An assembly diagram of a stator core, a first injection-molded structure, and an insulating cover plate in an electric motor, provided for an embodiment of this application;

[0058] Figure 11 A schematic diagram of the assembly structure of a first injection-molded structure, an insulating cover plate, and terminals in an electric motor provided in an embodiment of this application;

[0059] Figure 12 This is a schematic diagram of the structure of another terminal of a motor provided in an embodiment of this application;

[0060] Figure 13 A side view of a terminal in a motor provided in an embodiment of this application;

[0061] Figure 14 A schematic diagram showing the disassembled structure of the stator core, first injection molding structure, and insulating cover plate in an electric motor, provided for an embodiment of this application;

[0062] Figure 15 This is a partial cross-sectional structural diagram of a stator in an electric motor provided in an embodiment of this application;

[0063] Figure 16 A schematic diagram of the back structure of an insulating cover plate in an electric motor provided in an embodiment of this application;

[0064] Figure 17 This is another schematic diagram of a first injection-molded structure in an electric motor provided in an embodiment of this application;

[0065] Figure 18 A partial cross-sectional structural diagram of a motor in which a first injection molded part and an insulating cover plate are snapped together, provided as an embodiment of this application;

[0066] Figure 19 A schematic diagram of the front structure of an insulating cover plate in an electric motor provided in an embodiment of this application;

[0067] Figure 20 This is another schematic diagram of a first injection-molded structure in an electric motor provided in an embodiment of this application;

[0068] Figure 21 This is a partial side view structural diagram of the stator in an electric motor provided in an embodiment of this application;

[0069] Figure 22 A schematic diagram of the assembly structure of a second busbar and a temperature sensor in a motor provided in an embodiment of this application;

[0070] Figure 23 This is a schematic diagram of a second injection-molded structure in an electric motor provided in an embodiment of this application;

[0071] Figure 24 This application provides an enlarged schematic diagram of a partial structure of an assembly of a second busbar and a temperature sensor in a motor, as shown in the embodiments of this application.

[0072] Figure 25 A schematic diagram of the structure of a heat-conducting component on the second busbar in an electric motor, provided in an embodiment of this application;

[0073] Figure 26 This is a schematic diagram of the structure of a temperature sensor in a motor provided in an embodiment of this application;

[0074] Figure 27 A partial cross-sectional view of an assembly of a second busbar and a temperature sensor in a motor, provided as an embodiment of this application;

[0075] Figure 28 for Figure 24 A schematic diagram of the partial cross-sectional structure along the AA plane in the middle;

[0076] Figure 29 A partial structural schematic diagram of the second busbar in another motor provided in an embodiment of this application;

[0077] Figure 30 This is a schematic diagram of the structure of the second busbar in another type of motor provided in an embodiment of this application;

[0078] Figure 31 A schematic diagram of another assembly structure of a second busbar and a temperature sensor provided in an embodiment of this application;

[0079] Figure 32 for Figure 30 A schematic diagram of the cross-sectional structure along the BB surface in the middle;

[0080] Figure 33 This is a schematic diagram of the structure of another temperature sensor in a motor provided in an embodiment of this application;

[0081] Figure 34 This is a schematic diagram of the structure of a second busbar in a motor provided in an embodiment of this application;

[0082] Figure 35 for Figure 34 A schematic diagram of the cross-sectional structure along the CC plane;

[0083] Figure 36 This is a schematic diagram of the structure of another heat-conducting component in an electric motor provided in an embodiment of this application;

[0084] Figure 37 A schematic diagram of the structure of a second busbar in a motor provided in another embodiment of this application;

[0085] Figure 38 Another schematic diagram of the structure of the second busbar in a motor provided in this application embodiment;

[0086] Figure 39 for Figure 10 Enlarged view of the local structure of section C;

[0087] Figure 40a A cross-sectional schematic diagram of the assembly of stator slots and insulating components in an electric motor, provided as an embodiment of this application;

[0088] Figure 40b A cross-sectional schematic diagram of a stator slot in an electric motor provided in an embodiment of this application;

[0089] Figure 40cA cross-sectional schematic diagram of the assembly of stator slots and insulating components in a motor, provided as an embodiment of this application;

[0090] Figure 40d A cross-sectional schematic diagram of a stator slot in an electric motor provided in an embodiment of this application;

[0091] Figure 40e A cross-sectional schematic diagram of an insulator in the stator slot of an electric motor provided in an embodiment of this application;

[0092] Figure 40f This is a cross-sectional schematic diagram of the assembly of stator slots and insulating components in an electric motor, as provided in an embodiment of this application.

[0093] Explanation of reference numerals in the attached figures:

[0094] 100-Stator;

[0095] 10 - Stator core;

[0096] 11-Stator slot; 11a-Expansion space; 111-Slot opening; 112-Slot bottom;

[0097] 20 - Winding structure; 20a - Connection terminal;

[0098] 21a, 21b, 21c - First outgoing terminals;

[0099] 22a, 22b, 22c - Second outgoing terminals;

[0100] 30 - First injection molding structure;

[0101] 31-First injection molded part; 311-Snap-fit ​​part; 3111-Second snap-fit ​​structure; 3112a, 3112b-Guide slopes; 312-Second positioning structure;

[0102] 32a, 32b, 32c - First busbar; 321 - First main body; 322 - First end; 3221 - First electrical connector; 323 - Second end; 3231 - Electrical connection surface;

[0103] 40 - Insulating cover; 40a - Accommodation space;

[0104] 41-Top plate; 411-Isolation groove; 412-Baffle; 4111-First partition groove; 4112-Second partition groove; 413-First snap-fit ​​wall; 414-Second snap-fit ​​wall; 415-First snap-fit ​​structure; 416-First positioning structure;

[0105] 42-Side plate; 43-End plate; 44-Reinforcing member;

[0106] 50 - Second injection molding structure;

[0107] 51 - Second injection molded part;

[0108] 52-Temperature sensor; 521-Detection body; 522-Lead wire; 523-Connection slot;

[0109] 53-Second busbar; 531-Second main body; 532a, 532b, 532c-Connecting end; 5321-Second electrical connector; 533-Heat-conducting component; 533a-Bottom surface; 533b-Side surface; 533c-Top surface; 5331-First limiting structure; 5332-First guide structure; 5333-Second limiting structure; 5334-Third limiting structure; 5335-Fourth limiting structure; 5336-Second guide structure; 5337-Third guide structure; 5338-Spring structure; 5338a-Fixed end; 5338b-Elastic end; 5338c-Extension end; 534-Accommodating cavity; 534a-First cavity opening; 534b-Second cavity opening;

[0110] 60a, 60b, 60c - terminals;

[0111] 61-First connecting part; 62-Second connecting part; 63-Main body; 631-Bending structure; 64-Sleeve;

[0112] 70 - Insulation component; 70a - Overlap structure;

[0113] 71 - beginning; 72 - end. Detailed Implementation

[0114] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0115] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, serving as a power source for electrical appliances or various machines. Electric motors typically include round wire motors and flat wire motors. Flat wire motors specify that the stator winding is formed by winding wider flat copper wire, while round wire motors specify that the stator winding is formed by winding narrower round copper wire. Because flat wire motors offer advantages such as increased copper fill factor, improved heat dissipation, and reduced space at the winding ends, they have become an important method for increasing motor torque and power density. They are used in fields such as new energy vehicles to achieve goals such as increasing vehicle range, improving space utilization, and reducing powertrain costs.

[0116] As the pursuit of vehicle range and charging time intensifies, more and more vehicle drive systems are adopting high-voltage platforms to improve charging speed and motor power density. Furthermore, the thermal load on motors during operation is gradually increasing, and oil cooling is often used to dissipate heat from motors. Therefore, high-voltage oil-cooled motors have become an important development direction.

[0117] The motor mainly includes a housing, which comprises a casing and end covers located at both ends of the casing, such as a front end cover and a rear end cover. The front end cover, rear end cover, and casing together form a sealed cavity, within which a stator, rotor, and shaft can be housed. One end of the shaft can extend through the front end cover to the outside of the cavity to connect with external structures such as a reduction gear mechanism. The other end of the shaft can be rotatably connected to the rear end cover. The rotor can be fitted onto the shaft, and the stator can be fitted onto the outer circumference of the rotor. In other words, the front end cover and rear end cover are located on opposite sides of the stator along the axial direction, and the casing surrounds the circumferential outer surface of the stator. The rotor may include a rotor core and a winding structure wound around the rotor core, and the stator may include a stator core and a winding structure wound around the stator core to realize the electromagnetic conversion function of the motor.

[0118] It should be understood that the motor may also include other structural components to improve its overall structure. For example, the motor may also include cooling channels, oil spray rings, etc., allowing cooling liquid, such as oil coolant, to enter the cooling channels through the oil spray rings to dissipate heat from the stator. For instance, a cooling oil channel may be formed between the stator and the housing, with inlets and outlets located near the front and rear covers. Cooling oil can be sprayed from the inlets through the oil spray rings to the ends of the stator and its winding structure, and the cooled oil after heat exchange can flow out from the outlets.

[0119] Figure 1 This is a schematic diagram of the stator structure in an electric motor provided in an embodiment of this application.

[0120] See Figure 1 As shown, the stator 100 includes a stator core 10, which can be a hollow cylindrical structure with circumferential, axial, and radial directions. These three directions constitute the three orthogonal directions of the cylindrical structure. The axial direction of the stator core 10 is the direction of the rotation center axis of the cylindrical stator core 10; the axis of the stator core 10 is the rotation center axis. Figure 1 The axis L in the middle. The circumferential direction of the stator core 10 is the circumferential direction. The radial direction of the stator core 10 is perpendicular to the axial direction and is the radius or diameter direction of the end face circle of the cylindrical stator core 10. The circumferential, radial and axial directions of the motor can be parallel to the circumferential, radial and axial directions of the stator core 10.

[0121] A winding structure 20 is wound on the stator core 10. The winding structure 20 is distributed around the circumference of the stator core 10 and is also a hollow cylindrical structure. The axis of the winding structure 20 is the axis of the stator core 10, the axial direction of the winding structure 20 is the axial direction of the stator core 10, the circumference of the winding structure 20 is parallel to the circumference of the stator core 10, and the radial direction of the winding structure 20 is parallel to the radial direction of the stator core 10.

[0122] Specifically, the stator core 10 may have multiple stator slots 11, which may be distributed circumferentially along the stator core 10. The extension direction of each stator slot 11 may be parallel to the axial direction of the stator core 10. The stator slots 11 may limit and fix the winding structure 20, so that the winding structure 20 may be wound on the stator core 10 through the stator slots 11.

[0123] Figure 2 This is an assembly diagram of the stator core and winding structure in an electric motor provided in an embodiment of this application. Figure 3 for Figure 2 A magnified view of the local structure.

[0124] The winding structure 20 can be a multi-phase winding structure. For example, the winding structure 20 can be a three-phase winding structure, such as including a U-phase winding structure, a V-phase winding structure, and a W-phase winding structure. Each phase winding structure has a lead wire at its winding end, and the lead wire can be connected to a first output terminal, serving as the output terminal of that phase winding structure. (Combined with...) Figure 2 and Figure 3 As shown, the U-phase winding structure has a first output terminal 21a, the V-phase winding structure has a first output terminal 21b, and the W-phase winding structure has a first output terminal 21c.

[0125] Of course, in some other examples, the number of phases in the winding structure 20 can also be other numbers, such as five or six, that is, the winding structure 20 can be a five-phase winding structure, a six-phase winding structure, etc. For example, if the winding structure 20 can be a six-phase winding, it can include a U-phase winding structure, a V-phase winding structure, a W-phase winding structure, an A-phase winding structure, a B-phase winding structure, and a C-phase winding structure, respectively.

[0126] It should be noted that each phase winding structure may include multiple branches connected in parallel. Each branch may consist of multiple flat wire coils, with some coils located inside the stator slot 11 and some located outside the stator slot 11. One end of the multiphase winding structure 20 along the axial direction is a connecting end 20a. Multiple flat wire coils can be connected at the connecting end 20a by welding or other means to form the branch. The ends of the multiple branches are the ends of the winding structure. Each branch of each phase winding structure has a lead wire at its end, and each lead wire is connected to a first output terminal. For example, taking the U-phase winding structure as an example, it includes two branches, and the lead wires at the ends of the two branches are respectively connected to the first output terminal 21a.

[0127] The first output terminal can be located on the outer side of the connection end 20a of the winding structure 20 along the axial direction (on the side facing away from the stator core 10), so that the first output terminal can be electrically connected to external structural components such as the control unit in the powertrain, and control such as powering on the motor.

[0128] See also Figure 3 As shown, each phase winding structure may also include a neutral line, which is a conductor drawn from the neutral point of the winding structure. The end of the neutral line may be connected to a second output terminal, serving as the neutral point output terminal of that phase winding structure. For example, the U-phase winding structure includes a second output terminal 22a, the V-phase winding structure includes a second output terminal 22b, and the W-phase winding structure includes a second output terminal 22c.

[0129] In a winding structure where each phase includes multiple parallel branches, each branch has a neutral line, and each neutral line is connected to a second output terminal. For example... Figure 3 As shown, taking the U-phase winding structure as an example, it includes two branches, and the neutral lines of the two branches are respectively connected to the second output terminal 22a.

[0130] The second output terminal can also be located on the outer side of the connection terminal 20a of the multiphase winding structure 20 along the axial direction, so as to facilitate the electrical connection between the second output terminals.

[0131] To achieve electrical connection between the winding structure 20 and external structural components such as the powertrain control unit, the motor may also include multiple first busbars, each first busbar being connected to a corresponding first output terminal of each phase winding structure. See also... Figure 3As shown, multiple first buses are designated as first bus 32a, first bus 32b, and first bus 32c. First buses 32a, 32b, and 32c are located on the connection end 20a of the winding structure 20 and can be arranged side-by-side sequentially along the circumferential direction of the winding structure 20. The first output end 21a of the U-phase winding structure is connected to the first bus 32a, the first output end 21b of the V-phase winding structure is connected to the first bus 32b, and the first output end 21c of the W-phase winding structure is connected to the first bus 32c. Each bus is also electrically connected to a control unit, thereby electrically connecting the winding structure 20 to the control unit, etc.

[0132] Figure 4 This is a schematic diagram of the structure of the first busbar in a motor provided in an embodiment of this application.

[0133] Specifically, the molding material of each first bus can be a highly conductive material, for example, the first bus can be a copper bus. Each first bus may include a first body portion, a first end portion, and a second end portion, see [link to relevant documentation]. Figure 4 As shown, taking the first busbar 32a as an example, it includes a first main body 321, a first end 322 and a second end 323, and the first end 322 and the second end 323 can be located at both ends of the first main body 321 respectively.

[0134] A first electrical connector 3221 may be provided on the first end 322, in conjunction with Figure 3 As shown, the first busbar 32a can be electrically connected to the first output terminal 21a of the U-phase winding structure via the first electrical connector 3221. For example, the first electrical connector 3221 can be a solder joint formed by protrusions on the first end 322, and the first electrical connector 3221 can be electrically connected to the first output terminal 21a by welding or other means.

[0135] The number of first electrical connectors on a first end can be one or more. The number of first electrical connectors can correspond to the number of first outgoing terminals of each phase winding structure. For example, the U-phase winding structure includes two branches, each branch is connected to a first outgoing terminal, and the first end 322 can have two first electrical connectors 3221 to be connected to the first outgoing terminals of the two branches respectively.

[0136] An electrical connection surface 3231 may be formed on the second end 323. The electrical connection surface 3231 may be an end face on one end of the second end 323 that is parallel to the axial direction. The stator 100 may also include terminals (such as...). Figure 1Terminal 60a) in the middle, one end of the terminal can be electrically connected to the electrical connection surface 3231 by means of welding or other methods, and the other end of the terminal can be electrically connected to the control unit, so that the second end 323 can be electrically connected to the control unit or other external structural components through the terminal.

[0137] See also Figure 3 As shown, when the first busbar 32a, the first busbar 32b, and the first busbar 32c are connected to the first output terminal 21a of the U-phase winding structure, the first output terminal 21b of the V-phase winding structure, and the first output terminal 21c of the W-phase winding structure, respectively, the first busbar 32a, the first busbar 32b, and the first busbar 32c are suspended on the connection terminal 20a of the winding structure 20, resulting in poor stability.

[0138] In addition, to ensure the performance of the motor, a preset distance should be maintained between the first busbar 32a, the first busbar 32b, and the first busbar 32c. In particular, there should be a preset insulation distance between adjacent first busbars 32a and 32b, and between adjacent first busbars 32b and 32c. That is, there should be a preset insulation distance between two adjacent first busbars connected to different phase winding structures. This ensures that there is also an insulation distance between the first electrical connectors on adjacent first busbars. Especially in high-voltage motors, the insulation requirements between adjacent first busbars and first electrical connectors connected to different phase winding structures are high, and a longer insulation distance needs to be ensured.

[0139] Accordingly, to achieve the connection of the neutral line between multiphase windings, see [reference needed]. Figure 3 As shown, the stator 100 may also include a second busbar 53, which is located on the connection end 20a. Specifically, the second busbar 53 may be located on the outer periphery of the connection end 20a.

[0140] The second busbar 53 may include multiple spaced connection ends, which may be arranged sequentially along the circumference of the winding structure 20, with each connection end corresponding to the second output terminal of each phase winding structure. For example... Figure 3 As shown, the multiple connection ends are connection end 532a, connection end 532b and connection end 532c. The second output end 22a of the U-phase winding structure is connected to connection end 532a, the second output end 22b of the V-phase winding structure is connected to connection end 532b, and the second output end 22c of the W-phase winding structure is connected to connection end 532c.

[0141] Specifically, each second busbar can be equipped with a second electrical connector at its connection end, through which the connection end achieves electrical connection with the second outgoing terminal. For example, see [link to previous section]. Figure 3As shown, taking the connecting end 532a as an example, a second electrical connector 5321 is provided on the connecting end 532a, and the connecting end 532a is electrically connected to the second output end 22a through the second electrical connector 5321. For example, the second electrical connector 5321 can be a solder joint formed by protrusion on the connecting end 532a, and the second electrical connector 5321 can be electrically connected to the second output end 22a by welding or other means.

[0142] The number of second electrical connectors on a connection end can be one or more. The number of second electrical connectors can correspond to the number of second outgoing terminals of each phase winding structure. For example, the U-phase winding structure 20 includes two branches, each branch is connected to a second outgoing terminal, and the connection end 532a can have two second electrical connectors 5321 to be connected to the second outgoing terminals of the two branches respectively.

[0143] It should be understood that the second busbar should also maintain a preset insulation distance from the multiple first buses, so that the first electrical connector and the second electrical connector also have a safe insulation distance to ensure the performance of the motor.

[0144] In related technologies, a powder coating method is used to achieve the insulation safety distance. For example, the connection ends of the first busbar, the second busbar, and the winding structure are heated and placed in insulating powder. This causes the welding parts between the coils, the first busbar, the second busbar, the connection parts between the first electrical connector and the first output terminal, and the connection parts between the second electrical connector and the second output terminal to be coated with insulating powder. After cooling, an insulating layer is formed, which plays a role in insulation protection.

[0145] However, this insulation protection method has a relatively complex process, is not convenient for mass production, and has poor insulation safety performance, making it difficult to meet the high insulation safety requirements of high-voltage motors. In addition, the stability of the first busbar, the second busbar, etc. is poor.

[0146] Figure 5 This is an assembly diagram of a first injection-molded structure in an electric motor, provided as an embodiment of this application.

[0147] In this embodiment, to improve the stability of the first busbar and enhance insulation safety, the stator 100 may further include a first injection-molded structure 30, which is located at the connection end 20a of the winding structure 20 (see reference). Figure 6 (As shown) See above Figure 5 As shown, the first injection molding structure 30 may include a first injection molding part 31 and the aforementioned plurality of first busbars (such as first busbar 32a, first busbar 32b, and first busbar 32c).

[0148] Specifically, the first injection molded part 31 encloses the first main body of multiple first busbars (in conjunction with...). Figure 4 As shown), multiple first buses are fixed, and the multiple first buses are spaced apart circumferentially along the winding structure 20 to maintain an insulation safety distance. In this way, the gap between the first main body of two adjacent first buses will also have a first injection molded part 31. The first injection molded structure 30 formed can also extend circumferentially along the winding structure 20, which is convenient for assembly and helps to further reduce the size of the motor in the radial direction.

[0149] The molding material of the first injection molded part 31 can be a material with high insulation properties, such as polypropylene, polyethylene, polyvinyl chloride, etc. During the injection molding of the first injection molded part 31, multiple first busbars can be injection molded with the first injection molded part 31 to form an integral first injection structure 30.

[0150] On the one hand, the first injection molded part 31 can fix the first busbar, improve the stability of the first busbar, reduce or avoid the movement of the first busbar caused by the vibration of the motor during assembly, operation and other processes, ensure the performance of the motor, and help maintain a stable insulation distance between the first busbars.

[0151] On the other hand, the first injection molded part 31 encapsulates the first main body of multiple spaced-apart first buses. The space between the first main body of two adjacent first buses connected by different phase winding structures is filled with the insulating first injection molded part 31, which strengthens the insulation effect between adjacent first buses, improves the insulation safety of the first buses, and meets the insulation safety distance requirements of high-voltage motors. It also helps to reduce the length of the insulation distance between the first buses, thus reducing the volume of the stator 100's axial end.

[0152] Furthermore, the first injection-molded structure 30 can be formed by injection molding, and its assembly on the winding structure 20 can be completed by directly connecting it to the first output terminal. The structure and forming process are simple and easy to produce. Moreover, the multiple first busbars form an integral first injection-molded structure 30, which facilitates the overall welding with the winding structure 20 and also simplifies the assembly process of the stator 100.

[0153] It should be noted that the first end and the second end of the first busbar can be located outside the first injection molded part, for example, see [reference needed]. Figure 5 As shown, taking the first busbar 32a as an example, the first end 322 and the second end 323 are located outside the first injection molded part 31, thereby exposing the first electrical connector 3221 and the electrical connection surface 3231 to realize electrical connection with the first output terminal and the control unit, respectively.

[0154] Figure 6 This is an assembly diagram of the stator core, winding structure, and first injection-molded structure in an electric motor, provided as an embodiment of this application.

[0155] The first injection-molded structure 30 is assembled with the winding structure 20, such that the first electrical connectors of the plurality of first busbars are respectively connected to the first output terminals of each phase winding structure 20. For example, see [link to documentation]. Figure 6 As shown, the first electrical connector 3221 of the first busbar 32a is electrically connected to the first output terminal 21a, and the first electrical connector 3221 and the first output terminal 21a are exposed. The stator 100 is disposed in the receiving cavity formed by the housing and the end cover. The front end cover and the rear end cover are respectively located on both sides of the stator 100 along the axial direction, and the housing is sleeved on the outer periphery of the stator 100. To ensure the insulation safety of the motor, the first electrical connector and the first output terminal must maintain a preset insulation distance from the housing in the radial direction (i.e., the radial direction of the motor), and the first electrical connector and the first output terminal must also maintain a preset insulation distance from the end cover (the front end cover and the rear end cover) in the axial direction (i.e., the axial direction of the motor). That is, the stator 100 and the end cover have preset distances in the axial direction, and the stator 100 and the housing have preset distances in the radial direction. Since the first electrical connector and the first outgoing terminal are exposed, their insulation safety is poor. This requires a greater insulation safety distance between the stator 100 and the housing and end cover. In particular, the required insulation safety distance is even greater in high-voltage motors. This leads to an increase in the axial and radial dimensions of the motor, making the motor larger and making it difficult to meet the requirements of motor miniaturization design.

[0156] Figure 7 This is a top view of the stator structure in an electric motor, provided in an embodiment of this application. Figure 8 for Figure 1 Enlarged view of a portion of the structure in section A. Figure 9 This is a partially exploded schematic diagram of the stator core, first injection-molded structure, and insulating cover plate in an electric motor, provided as an embodiment of this application. Figure 10 This is an assembly diagram of a stator core, a first injection-molded structure, and an insulating cover plate in an electric motor, provided as an embodiment of this application.

[0157] To improve the insulation safety of the motor and reduce its size, in the embodiments of this application, see... Figure 7 and Figure 8 As shown, the stator 100 may further include an insulating cover plate 40, which covers the first injection-molded structure 30 to cover the first electrical connector and the first outgoing terminal, so that the first electrical connector and the first outgoing terminal are not exposed at least in the axial direction, or at least not exposed in the circumferential direction.

[0158] The insulating cover 40 can be made of a material with high insulation properties, such as polypropylene, polyethylene, or polyvinyl chloride. The molding material of the insulating cover 40 can be the same as that of the first injection molded part 31. The insulating cover 40 can also be formed by injection molding.

[0159] The insulating cover 40 can be located on the side of the first injection-molded structure 30 facing away from the stator core 10 along the axial direction, or it can be located on the side of the first injection-molded structure 30 facing away from the axis of the stator core 10. For example, the insulating cover 40 can be disposed on the side of the first injection-molded structure 30 facing away from the stator core, covering the side of the first electrical connector and the first outgoing terminal facing away from the stator core along the axial direction, that is, covering the first electrical connector and the first outgoing terminal in the axial direction. For example, see [link to example]. Figure 9 As shown, the insulating cover 40 includes a top plate 41, which can be located on the side of the first injection-molded structure 30 facing away from the stator core 10 along the axial direction (y direction in the figure). The top plate 41 serves to cover the exposed first electrical connector (such as the first electrical connector 3221) and the first lead-out end (such as the first lead-out end 21a). The top plate 41 can completely cover the side of the first electrical connector and the first lead-out end facing away from the stator core 10 in the axial direction. The first electrical connector and the first lead-out end are not exposed on the end face of the stator 100 along the axial direction (see reference). Figure 7 As shown, the first exposed electrical connection cannot be observed.

[0160] After the stator 100 is placed in the receiving cavity and assembled to form a motor, an insulating cover plate 40 (top plate 41) is provided between the first electrical connector and the first output terminal and the end cover. The insulating cover plate 40 can act as a barrier, increasing the electrical clearance and creepage distance between the first electrical connector and the first output terminal and the end cover, respectively. This effectively improves the insulation safety between the first electrical connector, the first output terminal and the end cover, and can better meet the insulation safety distance requirements of high-voltage motors. Moreover, it is beneficial to reduce the length of the insulation distance between the first electrical connector, the first output terminal and the end cover, that is, to reduce the axial distance between the stator 100 and the end cover, saving the end space of the motor along the axial direction, reducing the axial size of the motor and facilitating the miniaturization design of the motor.

[0161] The insulating cover 40 can be disposed on the side of the first injection-molded structure 30 facing away from the stator core axis, covering the side of the first electrical connector and the first outgoing terminal facing away from the stator core axis, that is, covering the outer side of the first electrical connector and the first outgoing terminal in the circumferential direction. For example, in combination with... Figure 8 and Figure 9As shown, the insulating cover 40 includes a side plate 42. The side plate 42 can be located on the side of the first injection-molded structure 30 facing away from the axis of the stator core 10 in the circumferential direction. The side plate 42 of the insulating cover 40 serves to cover the first electrical connector (such as the first electrical connector 3221) and the first outgoing terminal (such as the first outgoing terminal 21a). The side plate 42 can completely cover the side of the first electrical connector and the first outgoing terminal facing away from the axis in the circumferential direction. (Refer to...) Figure 10 As shown, the stator 100 does not have an exposed first electrical connection on its outer peripheral surface.

[0162] After the stator 100 is placed in the receiving cavity and assembled to form a motor, the first electrical connector and the first output terminal are respectively separated from the housing by insulating cover plates 40 (side plates 42), which can act as barriers. This increases the electrical clearance and creepage distance between the first electrical connector, the first output terminal and the housing, effectively improving the insulation safety of the motor and meeting the high insulation safety distance requirements of high-voltage motors. Furthermore, it helps to reduce the insulation distance between the first electrical connector, the first output terminal and the housing, that is, to reduce the distance between the stator 100 and the housing on the outer periphery of the stator 100, reducing the circumferential dimensions of the motor and further facilitating the miniaturization design of the motor.

[0163] The insulating cover 40 can extend to the second electrical connector and the second outgoing terminal to cover them. The insulating cover 40 can cover the side of the second electrical connector and the second outgoing terminal facing away from the stator core along the axial direction; for example, see [link to example]. Figure 9 As shown, the top plate 41 is located on the side of the first injection-molded structure 30 facing away from the stator core 10. The top plate 41 can completely cover the side of the second electrical connector (such as the second electrical connector 5321) and the second lead end (such as the second lead end 22a) facing away from the stator core 100 in the axial direction. The second electrical connector and the second lead end are not exposed on the end face of the stator 100 in the axial direction (see reference). Figure 8 (As shown). The second electrical connector and the second output terminal are also equipped with insulating cover plates 40 between themselves and the end cover, which serve as barriers, increase the electrical clearance and creepage distance between the second electrical connector, the second output terminal and the end cover, and further improve the insulation safety of the motor. While meeting the high insulation safety distance requirements of high-voltage motors, it can further save the end space of the motor along the axial direction and realize the miniaturization design of the motor.

[0164] The insulating cover 40 may cover the side of the second electrical connector and the second outgoing terminal facing away from the stator core axis, as exemplified, see below. Figure 9As shown, the side plate 42 is located on the side of the first injection-molded structure 30 facing away from the axis of the stator core 10 in the circumferential direction. The side plate 42 can completely cover the side of the second electrical connector (such as the second electrical connector 5321) and the second lead end (such as the second lead end 22a) facing away from the axis in the circumferential direction. There are no exposed second electrical connectors and second lead ends on the outer circumferential surface of the stator 100 (see reference). Figure 10 (As shown). Insulating covers 40, which act as barriers between the second electrical connector and the second output terminal and the housing, increase the insulation safety between the second electrical connector / output terminal and the housing, further enhancing the motor's insulation safety. While meeting the high insulation safety distance requirements of high-voltage motors, this design further reduces the circumferential dimensions of the motor, facilitating miniaturization.

[0165] It should be noted that the insulating cover 40 may cover only the side of the first electrical connector and the first outgoing terminal facing away from the stator core, or the insulating cover 40 may cover only the side of the first electrical connector and the first outgoing terminal facing away from the axis, or the insulating cover 40 may cover both the side of the first electrical connector and the first outgoing terminal facing away from the stator core and the side of the first electrical connector and the first outgoing terminal facing away from the axis. Correspondingly, the insulating cover 40 may also cover only the side of the second electrical connector and the second outgoing terminal facing away from the stator core, or the insulating cover 40 may cover only the side of the second electrical connector and the second outgoing terminal facing away from the axis, or the insulating cover 40 may cover both the side of the second electrical connector and the second outgoing terminal facing away from the stator core and the side of the second electrical connector and the first outgoing terminal facing away from the axis.

[0166] Figure 11 This is a schematic diagram of the assembly structure of a first injection-molded structure, an insulating cover plate, and terminals in an electric motor, provided as an embodiment of this application.

[0167] In this embodiment, an example is taken where the insulating cover 40 covers both the side of the first electrical connector, the first outgoing terminal, and the second electrical connector and the second outgoing terminal facing away from the stator core, and the side of the first electrical connector, the first outgoing terminal, the second electrical connector, and the second outgoing terminal facing away from the axis. See also Figure 11As shown, the insulating cover 40 may include a top plate 41 and a side plate 42, which form a receiving space 40a. The top plate 41 is disposed on the side of the first injection-molded structure 30 facing away from the stator core 10 along the axial direction, and the side plate 42 is disposed on the side of the first injection-molded structure 30 facing away from the axis in the circumferential direction, so that the first injection-molded structure 30 is located within the receiving space 40a, thereby placing the first electrical connector, the first lead-out terminal, the second electrical connector, and the second lead-out terminal within the receiving space 40a. The top plate 41 covers the side of the first electrical connector, the second electrical connector, the first lead-out terminal, and the second lead-out terminal facing away from the stator core, and the side plate 42 covers the side of the first electrical connector, the second electrical connector, the first lead-out terminal, and the second lead-out terminal facing away from the axis of the stator core, providing excellent insulation and separation, giving the motor better insulation safety, and making it more conducive to the miniaturization of the motor.

[0168] The side plate 42 and the top plate 41 can each be circumferentially extended arcs, so that the entire insulating cover 40 extends circumferentially, which facilitates assembly and helps to further reduce the size of the motor in the circumferential direction.

[0169] It should be understood that the top plate 41 covers the side of the first injection-molded structure 30 facing away from the stator core 10 along the axial direction. The top plate 41 needs to avoid the second end, allowing the second end to be exposed, so as to facilitate the connection of the second end with the control unit, etc. For example, see Figure 11 As shown, the top plate 41 of the insulating cover 40 only covers a portion of the first injection-molded structure 30, so that the second end of the first busbar (such as the second end 323 of the first busbar 32a) is located outside the side of the insulating cover 40 facing the axis of the stator core 10. The second end can be electrically connected to the control unit through terminals.

[0170] Of course, in some other examples, the insulating cover 40 can also completely cover the first injection-molded structure 30. A clearance hole can be provided at the part of the insulating cover 40 opposite to the second end, so that the second end can be exposed through the clearance hole to achieve electrical connection with the control unit through the connection end 20a.

[0171] It should be understood that the number of terminals may correspond to the number of phases in the winding structure 20, with each terminal corresponding to the first busbar connected to each phase winding structure. For example, see... Figure 11 As shown, the terminals may include terminals 60a, 60b, and 60c. Terminal 60a is electrically connected to the first busbar 32a, terminal 60b is electrically connected to the first busbar 32b, and terminal 60c is electrically connected to the first busbar 32c.

[0172] Figure 12 This is a schematic diagram of the structure of another terminal of a motor provided in an embodiment of this application. Figure 13This is a side view of a terminal in an electric motor, provided as an embodiment of this application.

[0173] For example, see terminal 60a. Figure 12 As shown, each terminal may include a body portion 63, a first connecting portion 61 and a second connecting portion 62, wherein the first connecting portion 61 of terminal 60a is electrically connected to the electrical connection surface 3231 on the second end portion 323, and the second connecting portion 62 is electrically connected to the control unit.

[0174] For example, the second connecting part 62 may have a first mounting hole 621, through which the second connecting part 62 can achieve electrical connection with the control unit. For example, the control unit may have a terminal block, on which a second mounting hole may be provided. The motor may also include a fixing member, which can be connected to the first mounting hole 621 and the second mounting hole respectively, so that the winding structure 20 can be connected to the control unit through terminals. The fixing member may be a bolt, screw, etc., and the first mounting hole 621 and the second mounting hole may be threaded holes or smooth holes that can mate with the fixing member.

[0175] The main body 63 can be flexible and can be bent to form a bent structure 631 (see reference). Figure 13 As shown, when assembling end caps and fuel injection rings, the body 63 can be bent to be in a vertical position (parallel to the axial direction) to avoid obstruction and facilitate the assembly of end caps, etc. After assembly, the body 63 can be bent to form a bent structure 631, so that the first connecting part 61 of the terminal can be connected to the first busbar, and the second connecting part 62 can be connected to the control unit. The first connecting part 61 and the second connecting part 62 can have a certain degree of rigidity to facilitate electrical connection.

[0176] To protect the soft main body, see [link / reference]. Figure 12 As shown, a sleeve 64 can be fitted onto the main body. The sleeve 64 serves two purposes: firstly, it protects the main body and reduces damage caused by bending; secondly, the sleeve 64 can be an insulating tube, providing insulation and isolation to improve the insulation safety of the motor.

[0177] For example, see Figure 13 As shown, along the axial direction of the stator core, the height of the end of the bent structure 631 facing away from the stator core 10 from the stator core 10 can be higher than the height of the second connecting part 62 from the stator core 10. The maximum height of the bent structure 631 is higher than the maximum height of the second connecting part 62. Figure 13The h-distance in the bending structure 631 makes an acute angle between the portion of the bending structure 631 adjacent to the first connecting portion 61 and the portion adjacent to the second connecting portion 62. The bending structure 631 has a large bending and adjustment space, which gives the second connecting portion 62 greater adjustment flexibility, facilitates the alignment of the first mounting hole and the second mounting hole of the second connecting portion 62, realizes the electrical connection between the terminal and the control unit, and reduces the difficulty of assembling the terminal and the control unit.

[0178] The terminal can be formed from a highly conductive material. For example, the terminal can be a metal part composed of copper foil, taking the structure formed by copper foil as an example. For instance, the terminal can be formed by stacking multiple layers of copper foil. At both ends of the terminal, relatively hard copper sheets can be formed by resistance welding or other methods to form the first connecting part 61 and the second connecting part 62, respectively. The main body in the middle region is not welded and has a certain degree of flexibility to achieve bending.

[0179] Figure 14 This application provides a schematic diagram showing the disassembled structure of the stator core, first injection-molded structure, and insulating cover plate in an electric motor, according to an embodiment of the present application. Figure 15 This is a partial cross-sectional structural diagram of the stator in an electric motor provided in an embodiment of this application. Figure 16 This is a schematic diagram of the back structure of an insulating cover plate in an electric motor, provided as an embodiment of this application.

[0180] In this embodiment, both the first and second output terminals of the winding structure 20 are located at the connection terminal 20a of the winding structure 20, to facilitate the connection of the first busbar and the second busbar to the first and second output terminals, respectively. See also Figure 14 As shown, the first injection molding structure 30 can be located on the side of the connecting end 20a facing away from the stator core along the axial direction, while the second busbar 53 can be located on the outer side of the connecting end 20a along the circumferential direction, that is, the second busbar 53 is located on the outer circumferential side of the connecting end 20a.

[0181] The first electrical connector, the first lead-out terminal, the second electrical connector, and the second lead-out terminal can be spaced apart on the circumference of the winding structure 20. The second lead-out terminal of each phase winding structure, the second electrical connector connected to the second lead-out terminal, and the first electrical connector connected to the first lead-out terminal are disposed adjacent to the first lead-out terminal of that phase winding structure. For example, see... Figure 14 As shown, taking the U-phase winding structure as an example, the second output terminal 22a and the second electrical connector 5321 are located closer to the first output terminal 21a and the first electrical connector 3221 to ensure insulation safety.

[0182] To isolate the different phase winding structures and the corresponding first and second electrical connections, see [reference needed]. Figure 15As shown, an isolation groove 411 is formed on the insulating cover plate 40. Specifically, multiple isolation grooves 411 can be formed on the side of the top plate 41 facing the stator core 10 (see reference). Figure 16 (As shown).

[0183] The first and second leads of the in-phase winding structure, a first electrical connector connected to the first lead and a second electrical connector connected to the second lead are located in an isolation slot. For example, see [link to relevant documentation]. Figure 15 As shown, the first electrical connector 3221, the first output terminal 21c, the second electrical connector 5321, and the second output terminal 22c are located within an isolation slot 411. That is, the first and second output terminals of different phase winding structures, along with the corresponding first and second electrical connectors, are located in different isolation slots. This increases the electrical clearance and creepage distance between different phase winding structures, and between the corresponding first and second electrical connectors of different phase winding structures, further enhancing the insulation safety of the motor.

[0184] Among them, see Figure 16 As shown, the top plate 41 can be recessed on the side facing the stator core 10 to form an isolation groove 411, and a protruding structure 419 can be formed on the side of the top plate 41 facing away from the stator core 10 at a position corresponding to the isolation groove 411 (see reference). Figure 19 As shown, the isolation groove 411 can extend to the protruding structure 419 to increase the depth of the isolation groove 411 and improve the insulation effect.

[0185] See also Figure 16 As shown, a baffle 412 can be provided in the isolation groove 411. The baffle 412 can divide the isolation groove 411 into a first partition groove 4111 and a second partition groove 4112. The first output terminal of the in-phase winding structure and the first electrical connector connected to the first output terminal are located in the first partition groove 4111, and the second output terminal and the second electrical connector connected to the second output terminal are located in the second partition groove 4112. For example, combined with Figure 15 As shown, the first electrical connector 3221 and the first output terminal 21c are located within the first partition groove 4111, and the second electrical connector 5321 and the second output terminal 22c are located within the second partition groove 4112. The partition can isolate and insulate the first output terminal and its connected first electrical connector and the second output terminal and its connected second electrical connector in the same-phase winding structure, increasing the electrical clearance and creepage distance between the first output terminal and its first electrical connector and the second output terminal and its second electrical connector within the same-phase winding structure, further improving the insulation safety of the motor.

[0186] See also Figure 16As shown, the insulating cover plate 40 may further include end plates 43, which are disposed on both sides of the top plate 41 and the side plate 42 along the circumferential direction (see reference). Figure 14 As shown, the end plate 43 can be connected to the top plate 41 and the side plate 42 respectively. On the one hand, it can increase the strength of the insulating cover plate 40 and ensure the insulation stability of the insulating cover plate 40. On the other hand, the end plate 43 blocks the two sides of the first injection-molded structure 30 in the circumferential direction, further sealing the accommodating space 40a, which is conducive to further increasing the creepage distance between the first and second electrical connectors and other metal structural parts in the motor, and helps to improve the insulation safety of the motor.

[0187] A reinforcing member 44 may also be provided on the insulating cover plate 40. The reinforcing member 44 is connected to the top plate 41 and the side plate 42 respectively to increase the strength of the insulating cover plate 40 and ensure the insulation stability of the insulating cover plate 40.

[0188] In this embodiment, the assembly method between the insulating cover plate 40 and the first injection molding structure 30 can be various. For example, the insulating cover plate 40 can be non-removably mounted on the first injection molding part 31 by means of bonding. Alternatively, the insulating cover plate 40 can also be detachably assembled and connected to the first injection molding part 31, which facilitates the disassembly and installation of the insulating cover plate 40, simplifies the assembly process, and improves installation efficiency.

[0189] For example, a first snap-fit ​​structure can be provided on the insulating cover plate, and a second snap-fit ​​structure can be provided on the first injection molded part. The insulating cover plate can be connected to the first injection molded part through the snap-fit ​​cooperation of the first snap-fit ​​structure and the second snap-fit ​​structure, which facilitates installation and disassembly.

[0190] For example, continue Figure 16 As shown, a first snap-fit ​​wall 413 and a second snap-fit ​​wall 414 can be provided on the side of the top plate 41 facing the first injection molded part 31. The first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 are arranged opposite to each other and there is a clearance gap between the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414. The side of the first snap-fit ​​wall 413 facing the second snap-fit ​​wall 414 and the side of the second snap-fit ​​wall 414 facing the first snap-fit ​​wall 413 can each have a protrusion to form a first snap-fit ​​structure 415.

[0191] Figure 17 This is another schematic diagram of a first assembly in a motor provided in an embodiment of this application. Figure 18 This is a partial cross-sectional structural diagram of a motor in which the first injection molded part and the insulating cover plate are snapped together, according to an embodiment of this application. Figure 19 This is a front structural diagram of an insulating cover plate in an electric motor provided in an embodiment of this application. Figure 20 This is another schematic diagram of the first injection-molded structure in an electric motor provided in an embodiment of this application.

[0192] See Figure 17 As shown, a snap-fit ​​portion 311 can be formed on the first injection molded part 31. Specifically, the snap-fit ​​portion 311 protrudes from the side of the first injection molded part 31 facing away from the axis (see reference). Figure 14 As shown, the two opposing sides of the snap-fit ​​portion 311 have grooves to form a second snap-fit ​​structure 3111.

[0193] Combination Figure 18 As shown, the protruding first snap-fit ​​structure 415 can be snapped into the recessed second snap-fit ​​structure 3111, thereby realizing the snap-fit ​​engagement between the first injection molded part 31 and the insulating cover plate 40 (top plate 41). The clearance between the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 provides a certain amount of movement space, allowing the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 to deform under external force, so that the first snap-fit ​​structure 415 on the first snap-fit ​​wall 413 and the second snap-fit ​​structure 3111 on the snap-fit ​​part 311 can engage with it.

[0194] For example, the first snap-fit ​​structure 415 can be located on the end of the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 facing away from the top plate 41, and the second snap-fit ​​structure 3111 can be located on the end of the snap-fit ​​portion 311 facing away from the top plate 41. After the first snap-fit ​​structure 415 and the second snap-fit ​​structure 3111 are engaged, the snap-fit ​​portion 311 can be located in the clearance gap between the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414, which helps to enhance the snap-fit ​​strength of the first snap-fit ​​structure 415 and the second snap-fit ​​structure 3111, thereby enhancing the assembly firmness of the first injection molded part 31 and the insulating cover plate 40 and ensuring the stability of the insulation.

[0195] See also Figure 18 As shown, to facilitate the engagement of the first snap-fit ​​structure 415 and the second snap-fit ​​structure 3111, the two opposing sides of the snap-fit ​​part 311 along the circumferential direction can have guide slopes, such as guide slopes 3112a and 3112b respectively. From the end of the snap-fit ​​part 311 facing the top plate 41 to the end of the snap-fit ​​part 311 facing away from the top plate 41, the two guide slopes 3112 are inclined in opposite directions. The two guide slopes can be in a figure-eight shape. The guide slopes are located on the side of the second snap-fit ​​structure 3111 facing away from the stator core 10, so that the first snap-fit ​​structure 415 of the insulating cover plate 40 can engage with the second snap-fit ​​structure 3111 after passing through the guide slopes. The guide slopes play a good guiding role and facilitate assembly.

[0196] See Figure 19As shown, a first clearance hole 417 may also be provided on the top plate 41. The first clearance hole 417 may be located on one side of the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 respectively, and may be provided adjacent to the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414, so that the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 may be formed by injection molding through the first clearance hole 417 during the injection molding process of forming the insulating cover plate 40.

[0197] The insulating cover plate 40 may also have a second clearance hole 418, which can be used to fix the lead wire 522 of the temperature sensor 52.

[0198] In addition, to facilitate the assembly of the insulating cover plate 40 and the first injection-molded structure 30, combined with Figure 18 and Figure 19 As shown, a first positioning structure 416 can be provided on the top plate 41, see [reference]. Figure 20 As shown, a second positioning structure 312 can be provided on the first injection molded part 31. The first positioning structure 416 and the second positioning structure 312 cooperate to perform a positioning function, so as to facilitate the accurate assembly between the insulating cover plate 40 and the first injection molded structure 30, which is beneficial to improving assembly efficiency.

[0199] The first positioning structure 416 can be a positioning hole that penetrates the top plate 41, or it can be a blind hole on the side of the top plate 41 facing the stator core 10. The second positioning structure 312 can be a protruding positioning post that can be inserted into the first positioning structure 416 to perform a positioning function (see reference). Figure 18 (As shown).

[0200] The first positioning structure 416 can be located between the first snap-fit ​​wall 413 and the second snap-fit ​​wall 414 (see reference). Figure 16 As shown, this design facilitates the snap-fit ​​connection between the insulating cover plate 40 and the first injection molded part 31 while positioning, making assembly easier.

[0201] In this embodiment of the application, in order to monitor the temperature of the stator and control the cooling of the stator, the motor may also include a temperature sensor. The temperature sensor may be set on the stator. Specifically, the temperature sensor may be set near the winding structure and in direct or indirect contact with the winding structure to improve the accuracy of temperature monitoring during stator operation.

[0202] Currently, most common temperature sensors are mounted on the second busbar, with one side of the temperature sensor in contact with one side of the second busbar, while the other side is exposed. When cooling fluids such as cooling oil are used to cool the stator, the cooling fluid will inevitably come into contact with the temperature sensor, resulting in a longer temperature detection feedback delay and inaccurate temperature detection.

[0203] Figure 21 This is a partial side view of the stator structure in an electric motor, provided in an embodiment of this application. Figure 22 This is a schematic diagram of a second injection-molded structure in an electric motor provided in an embodiment of this application. Figure 23 This is a schematic diagram of the assembly structure of a second busbar and a temperature sensor in a motor, provided in an embodiment of this application. Figure 24 This is an enlarged schematic diagram of a partial structure of a second busbar and temperature sensor assembly in a motor, provided as an embodiment of this application.

[0204] See Figure 21 As shown in the embodiment of this application, the stator 100 may further include a second injection molding structure 50. The second injection molding structure 50 is disposed on the outer periphery of the connection end 20a of the winding structure 20. The second injection molding structure 50 may include a second injection molding part 51, a second busbar 53 and a temperature sensor (not shown in the figure).

[0205] See Figure 22 As shown, the second busbar 53 may include a second main body 531 and multiple connecting ends (connecting ends 532a, 532b, and 532c as shown in the figure), with the multiple connecting ends disposed on the second main body 531. The second main body 531 may be located on the outer periphery of the connecting end 20a, and the second main body 531 may be an arc-shaped structure, with its extension direction parallel to the circumference of the winding structure 20, facilitating the placement of the second busbar 53 (second injection-molded structure 50) on the periphery of the winding structure 20.

[0206] Temperature sensor 52 is attached to one side 531a of the second main body 531. Heat generated by the operation of the stator 100 and winding structure 20 can be transferred to the second busbar 53 and temperature sensor 52 to detect the temperature of the stator 100. The second injection molded part 51 encloses the temperature sensor 52 and the second main body 531, and is combined with... Figure 23 As shown, the connecting ends 532a, 532b, and 532c are located outside the second injection molded part 51 so that the second electrical connectors on the connecting ends (such as the second electrical connector 5321 on the connecting end 532a) are exposed, which facilitates the electrical connection.

[0207] The second injection-molded part 51 serves to isolate and protect the temperature sensor 52, effectively preventing the coolant from directly contacting the temperature sensor 52, reducing the impact of the coolant on the temperature sensor 52, thereby reducing the feedback delay of the temperature sensor 52 and improving the detection accuracy of the temperature sensor 52. This achieves low delay and high accuracy while realizing temperature detection of the stator 100.

[0208] In addition, the second injection molded part 51 encapsulates the first main body 321 of the second busbar 53, which helps to improve the insulation safety between the second busbar 53 and the housing on the outer periphery of the stator 100, as well as between the second busbar 53 and the first busbar, and helps to reduce the size of the motor in the radial and axial directions, which is beneficial to the miniaturization design of the motor.

[0209] The molding material of the second injection molded part 51 can be a material with high insulation properties, such as polypropylene, polyethylene, polyvinyl chloride, etc. During the injection molding of the second injection molded part 51, the second busbar 53, on which the temperature sensor 52 is fixed, can be injection molded with the second injection molded part 51 to form an integral second injection structure 50.

[0210] It should be understood that the temperature sensor 52 can also be injection molded with other structural components that are directly or indirectly connected to the winding structure 20 to form an injection molded structure. For example, the temperature sensor can be attached to the first main body of the first busbar, and the temperature sensor and the first main body can be wrapped by a first injection molded part to form a first injection molded structure. The first injection molded part can also isolate and protect the temperature sensor, reduce the influence of the cooling liquid on the temperature sensor, and achieve the purpose of low delay and high accuracy in temperature detection under the condition of stator temperature detection.

[0211] Alternatively, the stator may also include a third injection-molded structure, which includes a third injection-molded part, a temperature sensor, and a first output terminal. The temperature sensor can be fitted onto the first output terminal. The third injection-molded part wraps around the temperature sensor and the first output terminal, which also serves to protect the temperature sensor. Under the condition of realizing the temperature detection of the stator, it has the effect of low delay and high accuracy.

[0212] In this embodiment, the example is a temperature sensor 52 mounted on a second busbar 53 to form a second injection-molded structure 50.

[0213] See also Figure 24 As shown, a heat-conducting element 533 may be provided on the second main body 531. The heat-conducting element 533 is provided on one side 531a of the second main body 531. The heat-conducting element 533 and one side of the second main body 531 can form a receiving cavity 534. The temperature sensor 52 can be accommodated and disposed in the receiving cavity 534. The temperature sensor 52 (detection body 521) can be attached to at least one side of the heat-conducting element 533.

[0214] On the one hand, the heat-conducting component 533 can accommodate and fix the temperature sensor 52, thus fixing the temperature sensor 52 on the second busbar 53. On the other hand, by making at least one side of the temperature sensor 52 fit in contact with the heat-conducting component 533, the heat from the second busbar 53 can also be transferred to the temperature sensor 52 through the heat-conducting component 533, increasing the heat transfer area between the temperature sensor 52 and the second busbar 53, further reducing the feedback delay of temperature detection, and improving the accuracy of detection.

[0215] The temperature sensor 52 may include a detection body 521 and a lead wire 522 (see reference). Figure 26 As shown, the detection body 521 is used to detect temperature. The detection body 521 can be connected to the control unit, etc., through the lead wire 522 to realize signal transmission. The detection body 521 can be set on the second main body 531 through the heat-conducting element 533, and the detection body 521 is attached to the heat-conducting element 533 and the second main body 531.

[0216] The heat-conducting component 533 may be integrally formed on the second main body 531 during the formation of the second busbar 53. Of course, in some other examples, the heat-conducting component 533 may also be formed separately from the second busbar 53 and then disposed on the second busbar 53. The specific disposal method may be welding, bonding, snap-fit ​​fixing, thread fixing, etc.

[0217] The specific structure and shape of the heat-conducting component 533 can be varied, as long as it can form a receiving cavity 534 with the second main body 531 to fix the temperature sensor 52.

[0218] Figure 25 This is a schematic diagram of the structure of a heat-conducting component on the second busbar of an electric motor, provided as an embodiment of this application.

[0219] See one possible implementation. Figure 25 As shown, the heat-conducting component 533 may include a bottom surface 533a and a side surface 533b, combined with Figure 24 As shown, the first end of the bottom surface 533a is connected to the second main body 531, and the second end of the bottom surface 533a is connected to the side surface 533b. The side surface 533b can be arranged opposite to the second main body 531. One side surface 531a of the second main body 531, the bottom surface 533a, and the side surface 533b together form a receiving cavity 534. The temperature sensor 52 is arranged in the receiving cavity 534. The temperature sensor 52 (detection body 521) can be attached to the bottom surface 533a and the side surface 533b respectively, so that the temperature sensor 52 can better fit with the heat-conducting component 533, has a large thermal contact area, and achieves the purpose of small feedback delay and high detection accuracy.

[0220] Temperature sensor 52 can be inserted into accommodating cavity 534. For example, a gap can be formed between the end of side surface 533b facing away from bottom surface 533a and the second main body 531 to form first cavity opening 534a (see reference). Figure 24 As shown in the figure, if the first cavity 534a is located at one end of the accommodating cavity 534 along the axial direction, the temperature sensor 52 can be inserted into the accommodating cavity 534 through the first cavity 534a (the insertion direction is as shown by the arrow in the figure), which facilitates assembly.

[0221] To improve the stability of the temperature sensor 52 setting on the second bus 53, please refer to [link / reference needed]. Figure 25 As shown, the heat-conducting component 533 is also provided with a spring structure 5338. The spring structure 5338 may include a fixed end 5338a and an elastic end 5338b. The spring structure 5338 is disposed on the heat-conducting component 533 through the fixed end 5338a. For example, the fixed end 5338a may be disposed on the side surface 533b of the heat-conducting component 533, or the fixed end 5338a may also be disposed on the bottom surface 533a of the heat-conducting component 533. Taking the fixed end 5338a disposed on the side surface 533b of the heat-conducting component 533 as an example, there is a gap between the elastic end 5338b and the side surface 533b to satisfy the movement space for the elastic deformation of the elastic end 5338b.

[0222] Figure 26 This is a schematic diagram of the structure of a temperature sensor in a motor provided in an embodiment of this application. Figure 27 This is a partial cross-sectional view of an assembly of a second busbar and a temperature sensor in a motor, provided in an embodiment of this application. Figure 28 for Figure 24 A schematic diagram of the partial cross-sectional structure along the AA plane.

[0223] See Figure 26 As shown, a slot 523 is provided on the temperature sensor 52 for mating with the spring structure 5338. Combined with... Figure 27 As shown, the fixed end 5338a of the spring structure 5338 is connected to the side 533b, and the elastic end 5338b of the spring structure 5338 is located on the side of the fixed end 5338a along the insertion direction of the temperature sensor 52 (arrow direction in the figure). The first end of the elastic end 5338b is connected to the fixed end 5338a, and the second end of the elastic end 5338b extends obliquely into the accommodating cavity.

[0224] When temperature sensor 52 is inserted into the first cavity 534a, it will compress the elastic end 5338b. When temperature sensor 52 is inserted into the receiving cavity 534, see [reference needed]. Figure 27As shown, the elastic end 5338b can be inserted into the insertion slot 523. The temperature sensor 52 is fixed by the cooperation between the elastic end 5338b and the insertion slot 523. Moreover, the rebound force of the elastic end 5338b can also act on the temperature sensor 52, pressing the temperature sensor 52 so that the temperature sensor 52 can fit better with the second main body 531.

[0225] It should be noted that the spring structure 5338 may also include other shapes and structures. For example, the spring structure 5338 may also include an extension end 5338c. The first end of the extension end 5338c may be connected to the elastic end 5338b, and the second end of the extension end 5338c may extend outward toward the accommodating cavity (see reference). Figure 34 As shown, the shape of the spring structure 5338 is enriched to improve the flexibility of the assembly structure between the temperature sensor 52 and the second busbar 53.

[0226] It should be understood that the shape of the insertion slot 523 on the temperature sensor 52 can be changed according to the shape of the spring sheet structure 5338 so that the shape of the insertion slot 523 can match the shape of the elastic end 5338b, so as to realize the insertion and engagement between the insertion slot 523 and the spring sheet structure 5338 and realize the positioning of the temperature sensor 52.

[0227] See also Figure 27 As shown, a first limiting structure 5331 may also be provided on the heat-conducting component 533. The first limiting structure 5331 is used to limit the temperature sensor 52 from disengaging from the first cavity opening 534a. Specifically, the first limiting structure 5331 may be provided on the side surface 533b at one end facing away from the bottom surface 533a. The first end of the first limiting structure 5331 may be connected to the side surface 533b, and the second end of the first limiting structure 5331 may extend toward the second main body 531, so that the first limiting structure 5331 is inclined to the side surface 533b, and an inclined angle (not equal to zero degrees and ninety degrees) is formed between the first limiting structure 5331 and the side surface 533b.

[0228] Combination Figure 28As shown, a second cavity 534b is formed between the second end of the first limiting structure 5331 and the second main body 531. The diameter of the second cavity 534b is smaller than that of the first cavity 534a. The first limiting structure 5331 is a relatively small sheet structure, which can be a metal sheet structure formed during the molding of the heat-conducting component. The first limiting structure 5331 can deform under external force, and the temperature sensor 52 can be inserted into the receiving cavity 534 by passing through the second cavity 534b and the first cavity 534a in sequence. Because the diameter of the second cavity 534b is smaller, it is difficult for the temperature sensor 52 to pass through the second cavity 534b and exit out of the receiving cavity 534, thereby further limiting the temperature sensor 52 and improving the stability of the temperature sensor 52.

[0229] Figure 29 This is a partial structural diagram of the second busbar in another motor provided in an embodiment of this application.

[0230] For easy insertion of temperature sensor 52 into accommodating cavity 534, see [reference needed]. Figure 29 As shown, the heat-conducting component 533 may also be provided with a first guide structure 5332. The first end of the first guide structure 5332 can be connected to the second end of the first limiting structure 5331, so that the first guide structure 5332 is disposed on the first limiting structure 5331. The second end of the first guide structure 5332 can extend in a direction away from the second main body 531. The second guide structure 5336 can be inclined to the side 533b and the second main body 531, and an inclined angle (not equal to zero degrees and ninety degrees) is formed between the second guide structure 5336 and the side 533b. From the second end to the first end of the first guide structure 5332, the gap distance between the first guide structure 5332 and the second main body 531 can gradually decrease, thereby playing a guiding role, so that the temperature sensor 52 can be inserted into the receiving cavity 534 after passing through the first guide structure 5332, the second cavity 534b and the first cavity 534a.

[0231] Figure 30 This is a schematic diagram of the structure of the second busbar in another type of motor provided in an embodiment of this application. Figure 31 This is a schematic diagram of another assembly structure of the second busbar and temperature sensor provided in an embodiment of this application. Figure 32 for Figure 30 A schematic diagram of the cross-sectional structure along the BB plane.

[0232] In another possible implementation, see Figure 30As shown, the heat-conducting component 533 may further include a top surface 533c, a bottom surface 533a, a side surface 533b, and the top surface 533c connected in sequence. The side surface 533b is disposed opposite to the second main body 531. The bottom surface 533a can be connected to one side of the second main body 531 and the side surface 533b respectively. The side surface 533b is connected to the top surface 533c. The end of the top surface 533c facing away from the side surface 533b extends toward the second main body 531. The bottom surface 533a, the side surface 533b, the top surface 533c, and one side 531a of the second main body 531 can together form a receiving cavity 534, combined with... Figure 31 As shown, the temperature sensor 52 is disposed in the accommodating cavity 534. The temperature sensor 52 (detection body 521) can be attached to the bottom surface 533a, the side surface 533b and the top surface 533c respectively, which further increases the contact area between the temperature sensor 52 and the heat-conducting component 533, thereby further reducing the feedback delay of temperature detection and improving the accuracy of detection.

[0233] One end of the top surface 533c facing away from the side surface 533b can extend to one side 531a of the second main body 531, abutting or connecting with the second main body 531. Alternatively, the end of the top surface 533c facing away from the side surface 533b can have a gap with the second main body 531, so that it can form a receiving cavity 534 for accommodating the temperature sensor 52.

[0234] Correspondingly, the temperature sensor 52 can also be installed in the accommodating cavity 534 by insertion. For example, the bottom surface 533a, the side surface 533b, the top surface 533c, and the second main body 531 can form an accommodating cavity 534 with openings at both ends, the openings at both ends being the first cavity opening 534a and the second cavity opening 534b, respectively (see reference). Figure 37 (As shown). The first cavity 534a and the second cavity 534b can be located at both ends of the circumferential direction of the receiving cavity 534. The first cavity 534a can be located on the side of the second cavity 534b closer to the edge of the second busbar 53. The temperature sensor 52 can be inserted into the receiving cavity 534 through the first cavity 534a, which facilitates the assembly of the temperature sensor 52.

[0235] To improve the stability of temperature sensor 52 settings, please refer to [link / reference]. Figure 31 As shown, a spring structure 5338 can also be provided on the heat-conducting component 533. The spring structure 5338 is fixedly connected to the heat-conducting component 533 through a fixed end 5338a. The fixed end 5338a can be provided on the side surface 533b, or it can be provided on the bottom surface 533a, or it can be provided on the top surface 533c.

[0236] Combination Figure 32As shown, taking the fixed end 5338a as an example where it is located on the side surface 533b, there is a gap between the elastic end 5338b and the side surface 533b to provide space for the elastic end 5338b to deform. The fixed end 5338a of the spring sheet structure 5338 is connected to the side surface 533b, and the elastic end 5338b is located along the insertion direction of the temperature sensor 52 from the fixed end 5338a. Figure 31 On one side (in the direction indicated by the middle arrow), the first end of the elastic end 5338b is connected to the fixed end 5338a, and the second end of the elastic end 5338b extends obliquely into the receiving cavity.

[0237] Figure 33 This is a schematic diagram of the structure of another temperature sensor in a motor provided in an embodiment of this application.

[0238] Accordingly, see Figure 33 As shown, a insertion slot 523 can be provided on the temperature sensor 52, which can be inserted and engaged with the elastic end 5338b. The temperature sensor 52 is inserted into the elastic end 5338b through the first cavity 534a. When the temperature sensor 52 is inserted into the receiving cavity 534, the elastic end 5338b and the insertion slot 523 cooperate to fix the temperature sensor 52, and the elastic end 5338b also presses the temperature sensor 52, so that the temperature sensor 52 can fit better with the second main body 531.

[0239] Figure 34 This is a schematic diagram of the structure of another temperature sensor in a motor provided in an embodiment of this application. Figure 35 for Figure 34 A schematic diagram of the cross-sectional structure along the CC plane.

[0240] The spring clip structure 5338 can also be in other structural forms, for example, see Figure 34 As shown, the spring structure 5338 may further include an extension end 5338c, the first end of which is connected to the elastic end 5338b, and the second end of which extends outward toward the receiving cavity 534. (See also...) Figure 35 As shown, the shape of the spring structure 5338 can be a hook shape, which enriches the shape design of the spring structure 5338.

[0241] To facilitate the insertion and engagement between the insertion slot 523 and the spring structure 5338, the shape of the insertion slot 523 can be matched with the shape of the spring structure 5338 to better position the temperature sensor 52.

[0242] Figure 36 This is a schematic diagram of the structure of another heat-conducting component in an electric motor provided in an embodiment of this application. Figure 37 This is a schematic diagram of the structure of a second busbar in a motor provided in another embodiment of this application. Figure 38This is yet another structural schematic diagram of the second busbar in a motor provided in an embodiment of this application.

[0243] See Figure 36 As shown, to further improve the stability of the temperature sensor 52, a second limiting structure 5333 may be provided on the heat-conducting component 533. The second limiting structure 5333 is used to prevent the temperature sensor 52 from disengaging from the second cavity 534b. Specifically, the second limiting structure 5333 is located at one end of the heat-conducting component 533 adjacent to the second cavity 534b (see reference). Figure 37 As shown, the first end of the second limiting structure 5333 can be connected to the side 533b, and the second end of the second limiting structure 5333 extends toward the second main body 531, so that the second limiting structure 5333 covers at least part of the second cavity 534b. The second limiting structure 5333 plays a blocking and limiting role, restricting the temperature sensor 52 from coming out of the second cavity 534b, thereby improving the stability of the temperature sensor 52 in the accommodating cavity 534.

[0244] The second end of the second limiting structure 5333 can extend to the second main body 531 and abut or connect with the second main body 531. Alternatively, there can be a gap between the second end of the second limiting structure 5333 and the second main body 531, which can limit the temperature sensor 52.

[0245] To prevent the temperature sensor 52 from disengaging from the first cavity opening 534a, for example, a third limiting structure 5334 and a fourth limiting structure 5335 may also be provided on the heat-conducting element 533. See also... Figure 36 As shown, the third limiting structure 5334 and the fourth limiting structure 5335 are respectively located on the heat-conducting element 533 at one end adjacent to the first cavity 534a.

[0246] The third limiting structure 5334 and the fourth limiting structure 5335 can be disposed within the receiving cavity 534 to limit the temperature sensor 52 located within the receiving cavity 534, preventing it from dislodging. For example, the third limiting structure 5334 and the fourth limiting structure 5335 can be disposed opposite to each other, such as on opposite bottom surfaces 533a and top surfaces 533c respectively, with a gap between them to allow the temperature sensor 52 to pass through, enabling it to be inserted into the receiving cavity 534 from the first cavity opening 534a.

[0247] The first end of the third limiting structure 5334 is connected to the bottom surface 533a. The second end of the third limiting structure 5334 can extend obliquely toward the fourth limiting structure 5335, and an oblique angle (not equal to zero degrees or ninety degrees) can be formed between the third limiting structure 5334 and the bottom surface 533a. The first end of the fourth limiting structure 5335 is connected to the top surface 533c. The second end of the fourth limiting structure 5335 can extend obliquely toward the third limiting structure 5334, and an oblique angle (not equal to zero degrees or ninety degrees) can be formed between the fourth limiting structure 5335 and the top surface 533c, so that the third limiting structure 5334 and the fourth limiting structure 5335 can form a figure-eight structure. The second ends of the third limiting structure 5334 and the fourth limiting structure 5335 form an opening with a small diameter. The third limiting structure 5334 and the fourth limiting structure 5335 can deform under external force, and the temperature sensor 52 can be inserted into the receiving cavity 534 through the first cavity opening 534a and the opening. However, because the opening diameter is small, it is difficult for the temperature sensor 52 to be removed from the receiving cavity 534, thus limiting the temperature sensor 52.

[0248] In addition, along the direction in which the temperature sensor 52 is inserted (the direction of the arrow in the figure), the distance between the third limiting structure 5334 and the fourth limiting structure 5335 can gradually decrease. The third limiting structure 5334 and the fourth limiting structure can also play a guiding role, making it easier for the temperature sensor 52 to be inserted and placed in the receiving cavity 534.

[0249] Of course, in some other examples, see Figure 37 As shown, the third limiting structure 5334 and the fourth limiting structure can also be located outside the accommodating cavity 534, and can also limit the temperature sensor 52 to prevent it from falling out. Combined with... Figure 38 As shown, the third limiting structure 5334 and the fourth limiting structure can also be located on the opposite bottom surface 533a and top surface 533c, respectively. The first end of the third limiting structure 5334 is connected to the bottom surface 533a, and the second end of the third limiting structure 5334 extends obliquely toward the fourth limiting structure 5335. The first end of the fourth limiting structure 5335 is connected to the top surface 533c, and the second end of the fourth limiting structure 5335 is obliquely toward the third limiting structure 5334. The second ends of the third limiting structure 5334 and the second ends of the fourth limiting structure 5335 can also form a small-diameter opening to limit the temperature sensor 52 and improve the stability of the temperature sensor 52 within the accommodating cavity 534.

[0250] Since the small-diameter opening is located at the end of the third limiting structure 5334 and the fourth limiting structure 5335 facing away from the receiving cavity 534, in order to facilitate the temperature sensor 52 to pass through this opening and be inserted into the receiving cavity 534, see [reference needed]. Figure 38As shown, the heat-conducting component 533 may also include a second guide structure 5336 and a third guide structure 5337 that are disposed opposite to each other. The second guide structure 5336 and the third guide structure 5337 may be disposed on the third limiting structure 5334 and the fourth limiting structure 5335, respectively.

[0251] The first end of the second guide structure 5336 can be disposed on the second end of the third limiting structure 5334. The second end of the second guide structure 5336 can extend obliquely toward the third guide structure 5337, and an oblique angle (not equal to zero degrees or ninety degrees) can be formed between the second guide structure 5336 and the bottom surface 533a. The first end of the third guide structure 5337 can be disposed on the second end of the fourth limiting structure 5335. The second end of the third guide structure 5337 can extend obliquely toward the second guide structure 5336, and an oblique angle (not equal to zero degrees or ninety degrees) can be formed between the second guide structure 5336 and the top surface 533c, so that the second guide structure 5336 and the third guide structure 5337 can also form a figure-eight structure. Along the direction in which the temperature sensor 52 is inserted, the distance between the second guide structure 5336 and the third guide structure 5337 can gradually decrease, thereby guiding the insertion of the temperature sensor 52 and facilitating the insertion of the temperature sensor 52 into the receiving cavity 534 through the opening.

[0252] Figure 39 for Figure 10 Enlarged view of the local structure of part C. Figure 40a This is a cross-sectional schematic diagram of the assembly of stator slots and insulating components in an electric motor, provided in an embodiment of this application. Figure 40b This is a cross-sectional schematic diagram of a stator slot in an electric motor, provided as an embodiment of this application.

[0253] In this embodiment of the application, the winding structure 20 is disposed in the stator slot 11, see [reference]. Figure 39 As shown, an insulating element 70 is provided between the inner wall of the winding structure 20 and the stator slot 11, combined with... Figure 40a As shown, the insulating element 70 can be arranged around the circumferential sidewall of the stator slot 11, and the insulating element 70 wraps the coil of the winding structure 20 located in the stator slot 11. The insulating element 70 can be insulating paper, which plays a role in isolating and insulating between the winding structure 20 and the stator core 10 to ensure the performance of the motor.

[0254] See Figure 40a As shown, the insulating member 70 may include a head end 71 and a tail end 72. The head end 71 and the tail end 72 are the two ends of the insulating member 70 along the circumferential direction. The head end 71 and the tail end 72 may at least partially overlap to form a lap structure 70a, which helps to improve the electrical clearance and creepage distance between the winding structure 20 and the stator core 10, and improve the insulation safety of the motor.

[0255] The first end 71 of the insulating member 70 may be located inside the tail end 72 (the side facing the slot 111) to form an overlapping structure 70a, or the tail end 72 may be located inside the first end 71 to form an overlapping structure 70a.

[0256] See Figure 40b As shown, an expansion space 11a can be formed within the stator slot 11, combined with... Figure 40a As shown, the overlapping structure 70a can be accommodated within the expanded space 11a. In other words, an expanded space 11a is specifically added within the stator slot 11 to accommodate the overlapping structure 70a. This allows for the accommodation of the overlapping structure 70a with a larger size and thickness, which in turn helps to increase the overlapping area between the first end 71 and the last end 72 of the insulation component 70. This further enhances the insulation safety of the motor and meets the insulation safety requirements of high-voltage motors.

[0257] The stator slot 11 may include a slot opening 111, a slot bottom 112, and a circumferential sidewall located between the slot opening 111 and the slot bottom 112. The slot opening 111 is positioned facing the axis of the stator core 10. See [reference needed]. Figure 40b As shown, an expansion space 11a can be formed in the recess of the bottom 112 of the stator slot 11, so that the overlapping structure 70a is located inside the bottom 112 of the slot.

[0258] Figure 40c This is a cross-sectional schematic diagram of the assembly of stator slots and insulating components in a motor, provided as an embodiment of this application. Figure 40d This is a cross-sectional schematic diagram of a stator slot in an electric motor provided in an embodiment of this application. Figure 40e This is a cross-sectional schematic diagram of an insulator in the stator slot of a motor, provided as an embodiment of this application. Figure 40f This is a cross-sectional schematic diagram of the assembly of stator slots and insulating components in an electric motor, as provided in an embodiment of this application.

[0259] Of course, in some other examples, the expansion space 11a can also be formed at any location of the stator slot 11, for example, in combination with Figure 40c and Figure 40d As shown, the expansion space 11a can be partially formed in the groove bottom 112 and partially formed in the circumferential sidewall, such as in the groove bottom 112 and sidewall recess of the stator groove 11, where the expansion space 11a is recessed, so that the overlapping structure 70a is partially located inside the groove bottom 112 and partially located inside the circumferential sidewall. In the overlapping structure 70a, see... Figure 40c As shown, the first end 71 of the insulating member 70 can be located inside the tail end 72, or, see... Figure 40e As shown, the tail end 72 of the insulating member 70 can also be located inside the head end 71.

[0260] Or see Figure 40fAs shown, the expansion space 11a can also be formed on the circumferential sidewall of the stator slot 11, such as forming the expansion space 11a in the sidewall recess, so that the overlapping structure 70a is located inside the sidewall.

[0261] This application also provides a powertrain that can be applied to electric vehicles (EVs), pure electric vehicles (PEVs / BEVs), hybrid electric vehicles (HEVs), range-extended electric vehicles (REEVs), plug-in hybrid electric vehicles (PHEVs), new energy vehicles, etc., or it can be applied to devices such as battery management, motors and drivers, and power converters.

[0262] The powertrain includes at least a reduction gear and any of the aforementioned motors. The motor can be connected to the reduction gear via a shaft, or the reduction gear can be integrated with the motor for use as a geared motor.

[0263] The powertrain may also include a control unit that is electrically connected to terminals on the motor to control the motor.

[0264] It should be understood that the powertrain may also include other structural components, such as clutches, heat exchangers, filters, etc.

[0265] This application also provides a vehicle that can be an electric vehicle (EV), a pure electric vehicle (PEV / BEV), a hybrid electric vehicle (HEV), a range-extended electric vehicle (REEV), a plug-in hybrid electric vehicle (PHEV), or a new energy vehicle.

[0266] The vehicle includes at least a body and any of the aforementioned motors, with the motors mounted on the body. The body may be a frame, or it may include a frame and a cover mounted on the frame, etc.

[0267] The vehicle may also include wheels and a transmission component. The motor can be connected to the transmission component, which in turn is connected to the wheels. The motor outputs power to the wheels through the transmission component, causing the wheels to rotate. The motor can also be connected to a reduction gear, which in turn is connected to the transmission component, to control the movement of the wheels.

[0268] The vehicle may also include other structural components to complete its functionality. For example, it may include braking components, steering mechanisms, etc.

[0269] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances. The terms "first," "second," "third," "fourth," etc. (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0270] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electric motor, characterized in that, It includes a stator core and a multiphase winding structure wound on the stator core. Each phase of the winding structure includes a first lead-out end and a second lead-out end. The first lead-out end of each phase of the winding structure is connected to the lead-out line of the same phase of the winding structure, and the second lead-out end of each phase of the winding structure is connected to the neutral line of the same phase of the winding structure. It also includes a first injection molding structure, which includes a first injection molding part and a plurality of first busbars. Each first busbar includes a first main body and a first electrical connector. The first injection molding part is disposed to wrap the first main body of the plurality of first busbars to fix the plurality of first busbars. The plurality of first busbars are arranged at intervals along the circumference of the winding structure. The first electrical connector of each first busbar is respectively electrically connected to the first output terminal of each phase of the winding structure. It also includes an insulating cover plate, which is disposed on the first injection-molded structure and covers the first electrical connector and the first outgoing terminal; It also includes a second bus, which includes a plurality of connection ends, the plurality of connection ends being arranged circumferentially along the winding structure, each connection end having a second electrical connector, and the second electrical connector on each connection end being respectively connected to the second output terminal of each phase of the winding structure; The insulating cover includes a top plate located on the side of the first injection-molded structure facing away from the stator core; the top plate has multiple isolation grooves on the side facing the first injection-molded part. The first and second output terminals of the in-phase winding structure, as well as the first and second electrical connectors respectively connected to the first and second output terminals, are located in an isolation slot.

2. The motor according to claim 1, characterized in that, The insulating cover plate covers the second electrical connector and the second outgoing terminal.

3. The motor according to claim 2, characterized in that, The insulating cover includes a side plate, which is located on the side of the first injection-molded structure opposite to the stator core axis. The side plate is connected to the top plate, and the side plate and the top plate form an accommodating space. The first electrical connector, the first outgoing terminal, the second electrical connector and the second outgoing terminal are located within the accommodating space.

4. The motor according to claim 3, characterized in that, One end of the multiphase winding structure along the axial direction is the connection end, and the first output end and the second output end are respectively located outside the connection end along the axial direction; The first injection-molded structure is located on the outer side of the connecting end along the axial direction, the second busbar is located on the outer peripheral side of the connecting end, and the first electrical connector, the first outgoing terminal, the second electrical connector and the second outgoing terminal are distributed in the circumferential direction; The second output terminal of each phase winding structure, the second electrical connector corresponding to the second output terminal, is disposed adjacent to the first output terminal of the same phase winding structure and the first electrical connector corresponding to the first output terminal.

5. The motor according to claim 4, characterized in that, A baffle is provided inside the isolation groove, which divides the isolation groove into a first partition groove and a second partition groove. The first outgoing terminal and the first electrical connector are located in the first partition groove, and the second outgoing terminal and the second electrical connector are located in the second partition groove.

6. The motor according to any one of claims 3-5, characterized in that, The insulating cover also includes end plates, which are located on both sides of the top plate and the side plate along the circumferential direction, and are respectively connected to the top plate and the side plate.

7. The motor according to any one of claims 3-5, characterized in that, The top plate is detachably connected to the first injection molded part.

8. The motor according to claim 7, characterized in that, The top plate is provided with a first snap-fit ​​structure, and the first injection molded part is provided with a second snap-fit ​​structure. The top plate and the first injection molded part are connected by the cooperation of the first snap-fit ​​structure and the second snap-fit ​​structure.

9. The motor according to claim 8, characterized in that, The top plate has a first snap-fit ​​wall and a second snap-fit ​​wall protruding on the side facing the first injection molded part. There is an avoidance gap between the first snap-fit ​​wall and the second snap-fit ​​wall. There are protrusions on the opposite side surfaces of the first snap-fit ​​wall and the second snap-fit ​​wall to form the first snap-fit ​​structure. The first injection molded part has a protruding snap-fit ​​portion on its outer peripheral side, and the snap-fit ​​portion has grooves on its opposite two side surfaces to form the second snap-fit ​​structure.

10. The motor according to claim 9, characterized in that, The first snap-fit ​​structure is located on the first snap-fit ​​wall and the second snap-fit ​​wall at the ends facing away from the top plate, respectively; The second snap-fit ​​structure is located at one end of the snap-fit ​​part facing away from the top plate, and the snap-fit ​​part is located within the clearance gap.

11. The motor according to claim 10, characterized in that, The two opposing sides of the snap-fit ​​portion also have guide slopes; The guide ramp is located on the side of the second snap-fit ​​structure facing away from the stator core, extending from the end of the snap-fit ​​portion facing the top plate to the end of the snap-fit ​​portion facing away from the top plate, with the two guide ramps inclined in opposite directions.

12. The motor according to any one of claims 2-11, characterized in that, It also includes a second injection molding structure, which includes a temperature sensor, a second injection molded part, and a second busbar; The second busbar also includes a second main body, a plurality of the connecting ends are disposed on the second main body, the temperature sensor is attached to one side of the second main body, and the second injection molded part is disposed to enclose the temperature sensor and the second main body.

13. The motor according to claim 12, characterized in that, The second busbar includes a heat-conducting element disposed on one side of the second main body. The heat-conducting element and one side of the second main body form a receiving cavity. The temperature sensor is located inside the receiving cavity and is attached to at least one side of the heat-conducting element.

14. The motor according to claim 13, characterized in that, The heat-conducting component includes a connected bottom surface and a side surface; The bottom surface is connected to the second main body, the side surface is opposite to the second main body, and the bottom surface, the side surface, and one side of the second main body together form the accommodating cavity. The temperature sensor is respectively attached to the bottom surface and the side surface.

15. The motor according to claim 13, characterized in that, The heat-conducting component includes a bottom surface, a side surface, and a top surface connected in sequence. The bottom surface is connected to the second main body, the side surface is opposite to the second main body, and the top surface extends toward the second main body at one end away from the side surface. The bottom surface, the side surface, the top surface, and one side of the second main body together form the accommodating cavity, and the temperature sensor is respectively attached to the bottom surface, the side surface, and the top surface.

16. The motor according to any one of claims 1-11, characterized in that, The first injection molding structure also includes a temperature sensor, which is attached to one side of the first main body, and the first injection molding part encloses the temperature sensor and the first main body.

17. The motor according to any one of claims 1-11, characterized in that, It also includes a third injection molding structure, which includes a temperature sensor, a third injection molded part, and the first outlet terminal; The temperature sensor is attached to one side of the first output terminal, and the third injection molded part is used to enclose the temperature sensor and part of the first output terminal.

18. The motor according to any one of claims 1-17, characterized in that, The stator core has multiple stator slots, which are spaced apart circumferentially along the stator core. The winding structure is wound around the stator slots, and an insulating element is provided between the winding structure and the inner wall of the stator slot.

19. The motor according to claim 18, characterized in that, The insulating element is arranged around the side wall of the stator slot, and the first and last ends of the insulating element along the surrounding direction at least partially overlap to form an overlap structure. The stator slot has an expansion space to accommodate the overlapping structure.

20. A powertrain, characterized in that, It includes a reduction gear mechanism and a motor as described in any one of claims 1-19, wherein the motor is connected to the reduction gear mechanism.

21. A vehicle, characterized in that, It includes a vehicle body and a motor as described in any one of claims 1-19, wherein the motor is mounted on the vehicle body.

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