Electric drive assembly and vehicle having the same

Abstract

The application provides an electric drive assembly and a vehicle with the same, which comprises a rotor assembly including a rotor shaft and a magnetic steel assembly arranged on the rotor shaft; a temperature testing device including a mounting assembly and a temperature detection assembly, the mounting assembly being connected with the rotor shaft and rotating synchronously with the rotor shaft, the temperature detection assembly including a temperature sensor arranged in the magnetic steel assembly, the temperature detection assembly further including a rotor coil and a stator coil arranged oppositely, the rotor coil being connected with the mounting assembly to rotate synchronously with the mounting assembly, the rotor coil being connected with a mounting base, and the temperature testing device further including a transmitter arranged in the mounting assembly, the temperature sensor being electrically connected with the transmitter, and the transmitter being used for transmitting an electric signal collected by the temperature sensor to the rotor coil. The application solves the problem that it is difficult to realize real-time and accurate measurement of the temperature of the magnetic steel due to high-speed rotation of the motor rotor.

Description

Technical Field

[0001] This invention relates to the field of electric drive assembly design technology, and more specifically, to an electric drive assembly and a vehicle having the same. Background Technology

[0002] Permanent magnet synchronous motors are widely used in electric vehicles and are characterized by high efficiency and high energy density. However, this also leads to common rotor overheating problems. Excessive rotor temperature can weaken the magnetic field, affect motor performance, and even cause demagnetization of permanent magnets. Therefore, it is particularly important to accurately measure the rotor temperature, especially the temperature of the magnets in the rotor, during the motor development stage.

[0003] There are currently four main rotor temperature measurement technologies: 1. Using algorithms to estimate rotor temperature under different motor operating conditions. The current load of the motor is determined based on signals such as motor speed and torque. The algorithm calculates the rotor temperature in real time based on the operating status. However, this method can only estimate the overall average temperature of the rotor and cannot definitively monitor the temperature at a specific location, and its accuracy is poor. 2. Installing a slip ring structure on the rotor and using carbon brushes and other structures to achieve signal transmission between rotating and non-rotating parts. However, the carbon brushes generate debris as they wear down, which negatively impacts cleanliness. 3. Using an infrared thermometer to measure the rotor temperature. Non-contact measurement has limitations. The measurement location is restricted to the rotor end, and the motor seal is compromised by the need to expose the rotor through a window in the motor housing, making oil-cooled motors unsuitable. Fourth, integrated temperature measurement devices integrate signal acquisition, storage, and power supply modules, allowing for independent operation on the rotor and recording temperature as it rotates. However, this method requires sufficient internal space in the motor, and the limited size restricts power supply time, making it unsuitable for long-term temperature measurement.

[0004] Existing motor rotor temperature measurement technologies generally suffer from problems such as poor measurement accuracy, inability to measure temperature at certain fixed locations, excessive modifications to the motor structure, and poor versatility, making them unsuitable for oil-cooled motors. Summary of the Invention

[0005] The main objective of this invention is to provide an electric drive assembly and a vehicle having the same, in order to solve the problem in the prior art that it is difficult to achieve real-time and accurate measurement of the magnet temperature in electric drive assemblies due to the high-speed rotation of the motor rotor.

[0006] To achieve the above objectives, according to one aspect of the present invention, an electric drive assembly is provided, comprising: a rotor assembly including a rotor shaft and a magnet assembly disposed on the rotor shaft; a temperature testing device including a mounting assembly and a temperature detection assembly, the mounting assembly being connected to the rotor shaft and rotating synchronously with the rotor shaft, the temperature detection assembly including a temperature sensor disposed within the magnet assembly, the temperature sensor being used to detect the temperature of the magnets on the magnet assembly, the temperature detection assembly further including a rotor coil and a stator coil disposed opposite to each other, the rotor coil being connected to the mounting assembly to enable the rotor coil to rotate synchronously with the mounting assembly, the stator coil being connected to a mounting base, the temperature testing device further including a transmitter, the transmitter being mounted within the mounting assembly, the temperature sensor being electrically connected to the transmitter, the transmitter being used to transmit the electrical signal collected by the temperature sensor to the rotor coil, the rotor coil being used to transmit the received electrical signal to the stator coil through the principle of electromagnetic induction, the rotor coil being able to transmit the electrical signal to the stator coil, so that the stator coil transmits the electrical signal to the control part of the temperature detection assembly.

[0007] Furthermore, the mounting components include: an adapter shaft connected to a rotor shaft, the adapter shaft and the rotor shaft rotating synchronously; a transmitter compartment connected to the adapter shaft, the transmitter being installed inside the transmitter compartment, and a rotor coil wound around the outer surface of the transmitter compartment.

[0008] Furthermore, the mounting components also include: a transmitter bracket located inside the transmitter compartment, the transmitter bracket being connected to the transmitter compartment via a fixing nut, the shape of the transmitter bracket being adapted to the shape of the transmitter, and the transmitter bracket being used to mount the transmitter; and a transmitter cover plate connected to the transmitter compartment.

[0009] Furthermore, the temperature detection assembly also includes a control unit, a control host, and a bench receiver. The control unit is electrically connected to the stator coil, the control host is electrically connected to the control unit, and the bench receiver is electrically connected to the control host. The control unit, the control host, and the bench receiver are all located away from the rotor assembly.

[0010] Furthermore, the rotor assembly also includes a rotor end plate, which is disposed adjacent to the magnet assembly. The rotor end plate is disposed on the rotor shaft. A rotor end plate wiring groove is provided on the side of the rotor end plate facing the magnet assembly. The rotor end plate wiring groove extends radially along the rotor end plate. The transmitter is electrically connected to the temperature sensor through wires, and at least part of the wires are located in the rotor end plate wiring groove.

[0011] Furthermore, there are multiple rotor end plate wiring slots, which are arranged symmetrically in pairs along the centroid of the rotor end plate. The groove walls of the rotor end plate wiring slots are provided with rotor end plate glue filling holes, which are used to fill the rotor end plate wiring slots with glue.

[0012] Furthermore, a rotor shaft wiring groove is provided on the outer surface of the end of the rotor shaft that is connected to the adapter shaft. The rotor shaft wiring groove extends along the axial direction of the rotor shaft and is connected to the wiring groove of the rotor end plate. The rotor shaft wiring groove is used to accommodate at least part of the wires.

[0013] Furthermore, the electric drive assembly also includes a motor rear end cover, which has a circular hole through which the adapter shaft passes. An oil seal is provided between the side wall of the circular hole and the adapter shaft.

[0014] Furthermore, the adapter shaft has a wire passage inside, with some of the wires located within the wire passage and electrically connected to the transmitter.

[0015] According to another aspect of the present invention, a vehicle is provided, including an electric drive assembly, the electric drive assembly being the electric drive assembly described above.

[0016] By applying the technical solution of this invention, a temperature detection component is installed using an mounting assembly, enabling the rotor coil to rotate synchronously with the mounting assembly. The rotor coil can then transmit the received electrical signal to the stator coil via electromagnetic induction, thereby achieving signal output. This technical solution solves the problem in existing electric drive assemblies where the high-speed rotation of the motor rotor makes it difficult to achieve real-time and accurate measurement of the magnet temperature. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of a first embodiment of the electric drive assembly according to the present invention is shown;

[0019] Figure 2 A schematic diagram of a second embodiment of the electric drive assembly according to the present invention is shown;

[0020] Figure 3 A schematic diagram of a third embodiment of the electric drive assembly according to the present invention is shown;

[0021] Figure 4 A schematic diagram of a fourth embodiment of the electric drive assembly according to the present invention is shown;

[0022] Figure 5 A schematic diagram of a fifth embodiment of the electric drive assembly according to the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 1. Temperature testing device; 11. Mounting assembly; 111. Transmitter cover; 112. Transmitter bracket; 113. Fixing nut; 114. Transmitter compartment; 115. Adapter shaft; 12. Temperature detection assembly; 121. Temperature sensor; 122. Transmitter; 123. Rotor coil; 124. Stator coil; 125. Control unit; 126. Control host; 127. Bench receiver; 15. Wire; 2. Rotor assembly; 21. Rotor shaft; 211. Rotor shaft wiring groove; 212. Keyway; 22. Rotor end plate; 221. Rotor end plate wiring groove; 222. Rotor end plate potting hole; 23. Magnet assembly; 231. Magnet; 232. Rotor core groove; 24. Flat key; 31. Motor rear end cover; 32. Oil seal. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0029] Combination Figures 1 to 5 As shown, according to a specific embodiment of this application, an electric drive assembly is provided.

[0030] The electric drive assembly includes: a rotor assembly 2, which includes a rotor shaft 21 and a magnet assembly 23 mounted on the rotor shaft 21; and a temperature testing device 1, which includes a mounting assembly 11 and a temperature detection assembly 12. The mounting assembly 11 is connected to the rotor shaft 21 and rotates synchronously with the rotor shaft 21. The temperature detection assembly 12 includes a temperature sensor 121 disposed within the magnet assembly 23, which is used to detect the temperature of the magnets 231 on the magnet assembly 23. The temperature detection assembly 12 also includes a rotor coil 123 and a stator coil 124 disposed opposite to each other. The rotor coil 123 is connected to the mounting assembly 11 so that the rotor coil 123... The temperature testing device 12 rotates synchronously with the mounting assembly 11. The stator coil 124 is connected to the mounting base. The temperature testing device 1 also includes a transmitter 122, which is installed inside the mounting assembly 11. The temperature sensor 121 is electrically connected to the transmitter 122. The transmitter 122 transmits the electrical signal collected by the temperature sensor 121 to the rotor coil 123. The rotor coil 123 transmits the received electrical signal to the stator coil 124 through electromagnetic induction. The rotor coil can transmit the electrical signal to the stator coil, so that the stator coil can transmit the electrical signal to the control part of the temperature detection assembly. The control part includes a control unit 125, a control host 126, and a bench receiver 127. The mounting base is preferably a housing, that is, the stator coil 124 is fixed to the outside. The main function of the mounting assembly 11 is to install the temperature detection assembly 12 on the drive motor so that it can function normally.

[0031] By applying the technical solution of this application, the temperature detection component 12 is installed through the mounting component 11, causing the rotor coil 123 to rotate synchronously with the mounting component 11. The rotor coil 123 can transmit the received electrical signal to the stator coil 124 through electromagnetic induction, thereby achieving signal output. This technical solution solves the problem in the prior art where the high-speed rotation of the motor rotor in electric drive assemblies makes it difficult to achieve real-time and accurate measurement of the magnet temperature. This application relates to the field of motor rotor temperature monitoring technology, is compatible with both water-cooled and oil-cooled motors, and solves the problem of traditional solutions being difficult to use on oil-cooled motor rotors. It is a simple, accurate, and versatile motor rotor temperature measurement solution. Multiple temperature sensors 121 can be arranged to measure the temperature of different magnets.

[0032] like Figure 2 As shown, the mounting assembly 11 includes: a transition shaft 115, which is connected to the rotor shaft 21 and rotates synchronously with the rotor shaft 21; a transmitter chamber 114, which is connected to the transition shaft 115, and a transmitter 122 is installed inside the transmitter chamber 114. A rotor coil 123 is wound around the outer surface of the transmitter chamber 114. The transmitter 122 is installed inside the transmitter chamber 114 in the mounting assembly 11 and placed in the transmitter bracket 112. It is clamped and fixed by both the transmitter cover plate 111 and the transmitter bracket 112. The function of the transmitter bracket 112 is to protect the transmitter 122 and prevent it from being sheared and damaged under the action of rotational inertia.

[0033] Furthermore, the mounting assembly 11 also includes: a transmitter bracket 112, which is located inside the transmitter compartment 114 and is connected to the transmitter compartment 114 by a fixing nut 113. The shape of the transmitter bracket 112 is adapted to the shape of the transmitter 122, and the transmitter bracket 112 is used to mount the transmitter 122; and a transmitter cover plate 111, which is connected to the transmitter compartment 114.

[0034] The rotor shaft 21 has a rotor shaft wiring groove 211 for wiring. The rotor end plate wiring groove 221 is opened on the inner side of the rotor end plate to better fix the wires and prevent them from being thrown off at high speed. In order to reduce the initial imbalance of the rotor, the rotor end plate wiring grooves are symmetrically opened. The rotor end plate potting hole 222 is a potting channel.

[0035] Furthermore, the temperature detection assembly 12 also includes a control unit 125, a control host 126, and a bench receiver 127. The control unit 125 is electrically connected to the stator coil 124, the control host 126 is electrically connected to the control unit 125, and the bench receiver 127 is electrically connected to the control host 126. The control unit 125, the control host 126, and the bench receiver 127 are all located away from the rotor assembly 2.

[0036] Furthermore, the rotor assembly 2 also includes a rotor end plate 22, which is disposed adjacent to the magnet assembly 23. The rotor end plate 22 is mounted on the rotor shaft 21. A rotor end plate wiring groove 221 is provided on the side of the rotor end plate 22 facing the magnet assembly 23. The rotor end plate wiring groove 221 extends radially along the rotor end plate 22. The transmitter 122 is electrically connected to the temperature sensor 121 via a wire 15, at least a portion of which is located within the rotor end plate wiring groove 221. This design, adapted for use with the temperature testing device 1, facilitates the arrangement and installation of the wiring harness. Figure 2 The flat key 24 is also shown.

[0037] like Figure 3 and Figure 4 As shown, a rotor core groove 232 is provided on the magnet assembly 23. The rotor core groove 232 extends along the axial direction of the magnet assembly 23 and is used to accommodate at least part of the temperature sensor 121.

[0038] Furthermore, there are multiple rotor end plate wiring slots 221, which are arranged symmetrically in pairs along the centroid of the rotor end plate 22. The walls of the wiring slots 221 are provided with rotor end plate potting holes 222 for filling the wiring slots with adhesive. The temperature sensor 121 is fixed in the rotor core groove 232 with potting compound and arranged close to the surface of the magnet 231, enabling more accurate detection of the magnet 231 temperature.

[0039] Furthermore, a rotor shaft wiring groove 211 is formed on the outer surface of the end of the rotor shaft 21 that connects to the adapter shaft 115. The rotor shaft wiring groove 211 extends axially along the rotor shaft 21 and communicates with the rotor end plate wiring groove 221. The rotor shaft wiring groove 211 is used to accommodate at least a portion of the wires 15. Figure 5 As shown, a keyway 212 is also provided on the rotor shaft 21, which is used to mate with the flat key 24. The wire 15 passes through the wiring groove 221 of the rotor end plate, the wiring groove 211 of the rotor shaft, and the inner hole of the adapter shaft 115 to electrically connect the temperature sensor 121 and the transmitter 122.

[0040] Furthermore, the electric drive assembly also includes a motor rear end cover 31, which has a circular hole through which the adapter shaft 115 passes. An oil seal 32 is provided between the side wall of the circular hole and the adapter shaft 115. The circular hole on the motor rear end cover 31 allows the temperature testing device 1 to pass through and be installed on the rotor assembly 2, while the oil seal 32 is added to prevent the coolant from flowing out.

[0041] Furthermore, the adapter shaft 115 has a wire passage inside, and part of the wire 15 is located in the wire passage and electrically connected to the transmitter 122.

[0042] In an optional embodiment, the temperature testing device 1 is used to dynamically test the real-time temperature of the magnet 231, which has the highest temperature in the rotor assembly 2. The mounting assembly 11 is fixed to the tail end of the rotor shaft 21 of the rotor assembly 2, with the two axially fixed by an interference fit and circumferentially torsion transmitted by a flat key 24. The transmitter chamber 114 is coaxially mounted on the adapter shaft 115, the end of which is threaded. A fixing nut 113 is tightened onto the thread, simultaneously clamping and fixing the transmitter chamber 114. A transmitter bracket 112 is installed inside the cavity of the transmitter chamber 114, and a transmitter cover 111 is installed on the transmitter chamber 114 and fixed with four bolts, simultaneously securing the transmitter bracket 112.

[0043] Temperature sensor 121 is fixed in the rotor core groove 232 with potting compound and arranged close to the surface of magnet 231, which can more accurately detect the temperature of magnet 231. Wire 15 passes through the rotor end plate wiring groove 221, rotor shaft wiring groove 211, and the inner hole of adapter shaft 115 to electrically connect temperature sensor 121 to transmitter 122. After wiring, the rotor end plate wiring groove 221 and rotor shaft wiring groove 211 are filled with potting compound. The glue-filling hole 222 on the rotor end plate is a glue-filling channel. To reduce the initial imbalance of the rotor, the rotor end plate wiring grooves are symmetrically opened. At the same time, the grooves on the inner side of the rotor end plate can better fix the wires and prevent them from falling off at high speeds. The transmitter 122 is installed inside the transmitter compartment 114 in the mounting assembly 11 and placed in the transmitter bracket 112. It is clamped and fixed by the transmitter cover 111 and the transmitter bracket 112. The function of the transmitter bracket 112 is to protect the transmitter 122 and prevent it from being sheared and damaged under the action of rotational inertia. The rotor coil 123 is electrically connected to the transmitter 122 and is wound around the outside of the transmitter compartment 114. It rotates coaxially with the rotor assembly 2. The rotor coil 123 and the stator coil 124 are arranged coaxially and transmit signals wirelessly. The stator coil 124, the control unit 125, the control host 126, and the bench receiver 127 are electrically connected. The signals received by the stator coil are transmitted and processed sequentially and finally received and stored by the bench receiver 127.

[0044] This rotor temperature dynamic testing device is highly adaptable and can be installed on different rotor assemblies by designing different inner diameters of the adapter shaft 115 to achieve rotor temperature measurement.

[0045] According to another specific embodiment of the present invention, a vehicle is provided, including an electric drive assembly, the electric drive assembly being the electric drive assembly described above.

[0046] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0047] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0048] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electric drive assembly, characterized in that, include: The rotor assembly (2) includes a rotor shaft (21) and a magnet assembly (23) disposed on the rotor shaft (21). A temperature testing device (1) includes a mounting assembly (11) and a temperature detection assembly (12). The mounting assembly (11) is connected to the rotor shaft (21) and rotates synchronously with the rotor shaft (21). The temperature detection assembly (12) includes a temperature sensor (121) disposed within the magnet assembly (23). The temperature sensor (121) is used to detect the temperature of the magnets (231) on the magnet assembly (23). The temperature detection assembly (12) also includes a rotor coil (123) and a stator coil (124) disposed opposite to each other. The rotor coil (123) is connected to the mounting assembly (11) to enable... The rotor coil (123) rotates synchronously with the mounting assembly (11). The rotor coil (123) is connected to the mounting base. The temperature testing device (1) also includes a transmitter (122). The transmitter (122) is installed in the mounting assembly (11). The temperature sensor (121) is electrically connected to the transmitter (122). The transmitter (122) is used to transmit the electrical signal collected by the temperature sensor (121) to the rotor coil (123). The rotor coil (123) can transmit the electrical signal to the stator coil (124) so ​​that the stator coil (124) can transmit the electrical signal to the control part of the temperature detection assembly (12). The installation component (11) includes: A transition shaft (115) is connected to the rotor shaft (21), and the transition shaft (115) and the rotor shaft (21) rotate synchronously. The transmitter compartment (114) is connected to the adapter shaft (115), the transmitter (122) is installed inside the transmitter compartment (114), and the rotor coil (123) is wound around the outer surface of the transmitter compartment (114).

2. The electric drive assembly according to claim 1, characterized in that, The installation component (11) also includes: A transmitter bracket (112) is located inside the transmitter compartment (114). The transmitter bracket (112) is connected to the transmitter compartment (114) by a fixing nut (113). The shape of the transmitter bracket (112) is adapted to the shape of the transmitter (122). The transmitter bracket (112) is used to install the transmitter (122). The transmitter cover (111) is connected to the transmitter compartment (114).

3. The electric drive assembly according to claim 2, characterized in that, The temperature detection component (12) also includes a control unit (125), a control host (126), and a bench receiver (127). The control unit (125) is electrically connected to the stator coil (124), the control host (126) is electrically connected to the control unit (125), and the bench receiver (127) is electrically connected to the control host (126). The control unit (125), the control host (126), and the bench receiver (127) are all located away from the rotor assembly (2).

4. The electric drive assembly according to claim 1, characterized in that, The rotor assembly (2) further includes a rotor end plate (22), which is adjacent to the magnet assembly (23). The rotor end plate (22) is disposed on the rotor shaft (21). The rotor end plate (22) has a rotor end plate wiring groove (221) on the side facing the magnet assembly (23). The rotor end plate wiring groove (221) extends radially along the rotor end plate (22). The transmitter (122) is electrically connected to the temperature sensor (121) through a wire (15). At least a portion of the wire (15) is located in the rotor end plate wiring groove (221).

5. The electric drive assembly according to claim 4, characterized in that, There are multiple rotor end plate wiring grooves (221), and the multiple rotor end plate wiring grooves (221) are arranged symmetrically in pairs along the centroid of the rotor end plate (22). The groove wall of the rotor end plate wiring groove (221) is provided with rotor end plate glue filling hole (222), and the rotor end plate glue filling hole (222) is used to fill the rotor end plate wiring groove (221) with glue.

6. The electric drive assembly according to claim 4 or 5, characterized in that, A rotor shaft wiring groove (211) is provided on the outer surface of the end of the rotor shaft (21) that is connected to the adapter shaft (115). The rotor shaft wiring groove (211) extends along the axial direction of the rotor shaft (21). The rotor shaft wiring groove (211) is connected to the rotor end plate wiring groove (221). The rotor shaft wiring groove (211) is used to accommodate at least a portion of the wires (15).

7. The electric drive assembly according to claim 1, characterized in that, The electric drive assembly also includes a motor rear end cover (31), on which a circular hole is provided, and the adapter shaft (115) passes through the circular hole. An oil seal (32) is provided between the side wall of the circular hole and the adapter shaft (115).

8. The electric drive assembly according to claim 4, characterized in that, The adapter shaft (115) has a wire passage inside, and part of the wire (15) is located in the wire passage and electrically connected to the transmitter (122).

9. A vehicle comprising an electric drive assembly, characterized in that, The electric drive assembly is the electric drive assembly according to any one of claims 1 to 8.

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