Electric drive assembly and vehicle

Abstract

The application relates to an electric drive assembly and a vehicle. The electric drive assembly comprises a first housing assembly with a through hole, an electric motor arranged in the first housing assembly, a controller arranged on the first housing assembly, and a busbar assembly comprising a busbar, a sealing structure and a sealing cover. The busbar comprises a first connecting end portion and a second connecting end portion. The first connecting end portion penetrates through the through hole, is arranged close to the electric motor and is electrically connected to the electric motor to utilize the temperature rise of the electric motor. The second connecting end portion is electrically connected to the first connecting end portion and the controller. The sealing structure is sleeved on the first connecting end portion and is sealingly contacted with the inner wall of the through hole. The sealing cover is arranged on the first housing assembly and covers the through hole, and an evaporation channel for connecting the through hole and the outside is formed between the sealing cover and the first housing assembly. The electric drive assembly realizes sealing with a simple structure and effectively avoids water vapor remaining in the housing.

Description

Technical Field

[0001] This application relates to the field of vehicle circuit structure technology, and in particular to electric drive assemblies and vehicles. Background Technology

[0002] With the continuous development of new energy vehicles, the power of these vehicles needs to be provided by electric drive systems, thus attracting increasing attention to electric motors.

[0003] Some vehicle models feature multiple motors, with different motors such as P0, P1, P2, P3, or P4 available depending on the configuration. Limited installation space for the motors and the desire for a compact electric drive assembly make the design of each component quite challenging.

[0004] An electric drive assembly typically includes a controller and a motor, with the controller electrically connected to the motor via a busbar. This means the busbar must pass through both the controller's housing and the motor's housing. To prevent moisture intrusion into the busbar, a sealing cap and a sealing ring are installed between the controller's housing and the motor's housing to ensure a tight seal.

[0005] However, during the operation of the electric drive assembly, the heat generated by the motor causes the internal temperature and air pressure of the housing to rise; when the motor stops working, the internal temperature of the housing drops and the air pressure decreases accordingly. Due to the thermal expansion and contraction effect, external moisture may be drawn into the gap between the sealing cover and the housing, making the connection between the manifold and the motor susceptible to moisture intrusion. The sealing ring is exposed to the water environment for a long time, thus accelerating aging and damage, affecting the sealing performance. Summary of the Invention

[0006] Therefore, it is necessary to provide an electric drive assembly and vehicle to address the problem that the connection between the bus and the motor is susceptible to moisture intrusion.

[0007] This application provides an electric drive assembly, comprising: a first housing assembly having a communication hole; a motor disposed within the first housing assembly; a controller disposed on the first housing assembly; and a bus assembly including a bus, a sealing structure, and a sealing cover. The bus includes a first connecting end and a second connecting end. The first connecting end passes through the communication hole, is arranged close to the motor, and is electrically connected to the motor to utilize the temperature of the motor for heating. The second connecting end is electrically connected to the first connecting end and the controller. The sealing structure is sleeved on the first connecting end and makes a sealing contact with the inner wall of the communication hole. The sealing cover is disposed on the first housing assembly and covers the communication hole, and an evaporation channel connecting the communication hole to the outside is provided between the sealing cover and the first housing assembly.

[0008] By setting the first sealing structure to contact the inner wall of the first hole of the upper protrusion, a seal is achieved, protecting the first motor. By setting an evaporation channel in the sealing cover, when external water vapor is drawn into the gap between the sealing cover and the first housing assembly, the heat generated by the first motor can be used to evaporate the water vapor, which is then discharged through the evaporation channel. This ensures that the liquid at the manifold assembly is completely evaporated and drained, preventing water vapor retention that could cause water vapor intrusion at the connection between the first manifold and the first motor. It also prevents the first sealing structure from being directly exposed to the water environment for extended periods, ensuring sealing performance. Furthermore, the sealing cover has a simple structure and occupies little space. The first sealing structure is placed in the first hole, making the manifold assembly and the first housing assembly in the electric drive assembly compact.

[0009] In some embodiments, the sealing structure includes an insulating shell and a sealing ring. The insulating shell is fitted onto the connecting end, and the sealing ring is fitted onto the insulating shell and makes sealing contact with the inner wall of the connecting hole. The insulating shell includes an upper section located between the sealing ring and the sealing cover, and the upper section has a gap with the inner wall of the connecting hole that communicates with the evaporation channel.

[0010] This design ensures a tight seal with the sealing ring; the gap at the top allows the liquid to evaporate and rise smoothly, preventing it from accumulating for too long.

[0011] In some implementations, the upper section has a buffer groove that communicates with the gap.

[0012] This setting helps to buffer excessive water volume, reducing the impact on the sealing performance of the sealing ring.

[0013] In some embodiments, the first housing assembly includes an upper protrusion, the communicating hole is disposed on the upper protrusion, and the sealing cap is disposed on the upper protrusion.

[0014] This design reduces the amount of water flowing into the connecting holes from the evaporation channel.

[0015] In some embodiments, the first housing assembly includes a first housing and a second housing that are axially joined along the motor. The first housing includes an upper protrusion and a side strip for engaging the second housing. A flow channel is formed between the upper protrusion and the side strip, and the flow channel communicates with the evaporation channel on the side of the upper protrusion away from the side strip.

[0016] This configuration facilitates the assembly of the first motor into the first housing assembly; the side strip is used to connect with the second housing, while the evaporation channel on the side of the upper protrusion away from the side strip is directly connected to the outside, providing a larger atmospheric flow area, which is beneficial for evaporation; the guide channel can accommodate liquid or condensed liquid drawn into the gap between the sealing cover and the first housing assembly from the second housing, and guide it to the evaporation channel on the side of the upper protrusion away from the side strip, promoting smooth evaporation and ensuring that the water vapor around the upper protrusion can evaporate smoothly, avoiding water vapor accumulation.

[0017] In some embodiments, the controller includes a second housing assembly and a circuit assembly. The second housing assembly includes a recess that is snapped onto an upper protrusion and a sealing cover. The circuit assembly is disposed within the second housing assembly and is electrically connected to a second connection end.

[0018] This configuration results in a high degree of integration and a compact structure for the controller, bus assembly, and first housing assembly.

[0019] In some embodiments, the circuit assembly includes a circuit connection point and a screw mechanism, the screw mechanism passing through the circuit connection point and the second connection end along the axial direction of the motor; the second housing assembly includes a side panel and a cover plate, the side panel having a maintenance window projected onto the screw mechanism along the axial direction of the motor, and the cover plate for sealing the maintenance window.

[0020] This configuration allows for the connection or disconnection of circuit connection points and second connection ends after the controller is assembled, making it easy to install and maintain.

[0021] In some implementations, the first connecting end and the second connecting end are offset along the axial direction of the motor, with the second connecting end being closer to the maintenance window than the first connecting end.

[0022] This arrangement facilitates the assembly of the second connection end with the circuit connection point; it also facilitates the assembly of the first connection end with the motor connection point.

[0023] In some embodiments, the number of connecting holes is at least two, namely a first hole and a second hole; the number of motors is at least two, namely a first motor and a second motor; the number of busbars is at least two, namely a first busbar and a second busbar; the first connecting end of the first busbar passes through the first hole, is arranged close to the first motor and electrically connected to the first motor; the first connecting end of the second busbar passes through the second hole, is arranged close to the second motor and electrically connected to the second motor; the number of sealing structures is at least two, namely a first sealing structure and a second sealing structure; the first sealing structure is sleeved on the first connecting end of the first busbar and makes a sealing contact with the inner wall of the first hole; the second sealing structure is sleeved on the first connecting end of the second busbar and makes a sealing contact with the inner wall of the second hole.

[0024] With this configuration, the first and second motors can be used to perform different functions.

[0025] For example, there are multiple evaporation channels, at least one evaporation channel is connected to the second hole, and at least another evaporation channel is connected to the first hole.

[0026] This configuration results in a compact bus assembly with a small size and a high degree of integration of the electric drive assembly.

[0027] In some embodiments, the first housing assembly includes a first housing and a second housing that are axially joined along the motor. The first housing includes a partition and an upper protrusion, which together form a motor cavity. The side of the partition away from the second housing is used to form a speed change cavity. A controller is located on the speed change cavity.

[0028] With this configuration, the electric drive assembly has a compact structure and a relatively regular shape, which facilitates installation; the internal circuit structure of the controller is also easy to configure.

[0029] For example, the controller is connected to the first housing and also to the second housing.

[0030] This design makes the electric drive assembly robust and easy to install.

[0031] In some embodiments, the bus assembly further includes a third sealing structure, which is sleeved on the second connection end and the fourth connection end, passes through the third hole of the controller, and seals against the inner wall of the third hole.

[0032] This design achieves a seal, protects the controller, and facilitates installation and adjustment.

[0033] A second aspect of this application provides a vehicle that includes the aforementioned electric drive assembly.

[0034] The vehicle described in this application can make good use of its internal space and operate safely. Attached Figure Description

[0035] Figure 1 This is a cross-sectional structural schematic diagram of an electric drive assembly according to one or more embodiments;

[0036] Figure 2 This is a schematic front view structural diagram of an electric drive assembly according to one or more embodiments;

[0037] Figure 3 A schematic exploded view of an electric drive assembly according to one or more embodiments;

[0038] Figure 4 This is a schematic diagram of the structure of a first shell according to one or more embodiments;

[0039] Figure 5 This is a schematic diagram of a bus assembly according to one or more embodiments;

[0040] Figure 6 This is a schematic diagram of the bus assembly and the first housing according to one or more embodiments;

[0041] Figure 7 for Figure 6 A schematic enlarged view of point A in the middle;

[0042] Figure 8 A schematic cross-sectional view of an electric drive assembly according to one or more embodiments;

[0043] Figure 9 This is another schematic cross-sectional view of an electric drive assembly according to one or more embodiments;

[0044] Figure 10 This is a schematic diagram of an electric drive assembly in a maintenance window open state according to one or more embodiments;

[0045] Figure 11 This is a block diagram showing the relationship between vehicles according to one or more embodiments.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. First busbar; 11. First connecting end; 12. Second connecting end; 2. Second busbar; 3. Sealing body; 31. First sealing structure; 311. Insulating shell; 3110. Buffer groove; 3111. Upper section; 312. Sealing ring; 32. Sealing cover; 321. Lower cover; 3210. Evaporation channel; 322. Upper cover; 33. Second sealing structure; 34. Third sealing structure;

[0048] 100, First shell; 110, Upper protrusion; 101, Connecting hole; 102, Gap; 111, First hole; 112, First hole wall; 113, Flow channel; 114, Second hole; 115, Second hole wall; 120, Side strip; 130, Partition; 200, Second shell; 300, Third shell; 310, Recess; 3101, Gap; 301, Third hole wall; 302, Third hole; 400, Fourth shell; 410, Side wall plate; 401, Maintenance window; 420, Cover plate; 430, Connecting lug;

[0049] 1000, Electric drive assembly; 1010, First housing assembly; 1020, Motor; 1021, First motor; 1030, Busbar assembly; 1031, Busbar; 1032, Sealing structure; 1100, Controller; 1110, Second housing assembly; 1120, Circuit assembly; 1121, Circuit connection point; 1122, Tightening component; 2000, Internal combustion engine; 3000, Vehicle. Detailed Implementation

[0050] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0051] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0052] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. For example, a first sealing structure may also be referred to as a second sealing structure, and a second sealing structure may also be referred to as a first structure. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a flexible connection or a rigid connection along at least one direction; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium, or a direct connection with an intermediate medium present; and they can also refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Thermal coupling can be direct contact or heat exchange through a medium, which can be solid, liquid, or gaseous. The terms "installed," "set," "fixed," "coupled," etc., can be broadly understood as connection. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0055] As used in this application, the terms "layer" and "region" refer to a material portion comprising a defined area and having a defined thickness. A layer can extend horizontally, vertically, and / or along a conical surface. A layer can be a region of uniform or non-uniform continuous structure, and its thickness perpendicular to the direction of extension may not exceed the thickness of the continuous structure. A layer can comprise multiple layers, which can be stacked layers or discretely extending layers. The shapes of the various regions and layers in the accompanying drawings, as well as their relative sizes and positional relationships, are merely illustrative and may deviate from actual dimensions due to manufacturing tolerances or technical limitations, and the design can be adjusted according to actual needs.

[0056] An electric drive assembly typically includes a controller and a motor, with the controller electrically connected to the motor via a busbar. This means the busbar must pass through both the controller and motor housings. To prevent moisture intrusion into the busbar, a sealing cap is required at the housing for a tight seal; to ensure complete sealing, this cap is relatively large. However, during operation, the motor generates heat, increasing the internal temperature and pressure of the housing. When the motor stops, the internal temperature and pressure decrease. Due to thermal expansion and contraction, external moisture may be drawn into the gap between the sealing cap and the housing, making the connection between the busbar and the motor susceptible to moisture intrusion. The sealing ring, constantly exposed to a water environment, ages and deteriorates faster, affecting its sealing performance.

[0057] refer to Figure 1 , Figure 1 A cross-sectional view of the electric drive assembly in an embodiment of this application is shown. In the electric drive assembly 1000, the motor and the transmission can be mounted together, and the controller 1100 is electrically connected to the motor.

[0058] For ease of description, a Cartesian coordinate system XYZ can be established. For example, the Z direction can be roughly parallel to the up and down direction, and the XY directions can be roughly parallel to the circumference of the motor.

[0059] Combination Figure 2 and Figure 3 As shown, in some embodiments, the electric drive assembly 1000 may include a first housing assembly 1010, a motor 1020, a bus assembly 1030, and a controller 1100. The motor 1020 is disposed within the first housing assembly 1010, and the controller 1100 is disposed on the first housing assembly 1010.

[0060] The first housing assembly 1010 may include multiple housings, which can be assembled to form multiple chambers. Exemplarily, the first housing assembly 1010 may include an upper protrusion 110. The upper protrusion 110 may be an integral structure, integrally disposed on one of the housings.

[0061] Combination Figure 4 As shown, the upper protrusion 110 protrudes upwards generally along the Z direction. The upper protrusion 110 may have a connecting hole 101. In the illustrated embodiment, there are two connecting holes 101, namely a first hole 111 and a second hole 114. The inner wall of the first hole 111 is the first hole wall 112, and the inner wall of the second hole 114 is the second hole wall 115. Of course, the number of connecting holes 101 can also be set to one, three, four, or more as needed.

[0062] refer to Figure 5 The bus assembly 1030 includes a bus 1031, a sealing structure 1032, and a sealing cap 32. The bus 1031 includes a first connecting end 11 and a second connecting end 12. The first connecting end 11 is electrically connected to the second connecting end 12. The sealing structure 1032 and the sealing cap 32 can be used to form a sealing body 3.

[0063] For ease of description, the following explanation will take the motor 1020, which includes the first motor 1021, as an example. Correspondingly, the busbar 1031 includes the first busbar 1, and the sealing structure 1032 includes the first sealing structure 31.

[0064] refer to Figure 2 The second connection end 12 is electrically connected to the controller 1100. (Combined) Figure 6 and Figure 7 As shown, the first connecting end 11 passes through the first hole 111 of the upper protrusion 110. The first connecting end 11 is arranged close to the first motor 1021 and electrically connected to the first motor 1021 so as to utilize the temperature of the first motor 1021 to raise the temperature.

[0065] The first sealing structure 31 is sleeved on the first connecting end 11, and the first sealing structure 31 makes a sealing contact with the first hole wall 112 of the upper protrusion 110. The first sealing structure 31 can be inserted into the first hole 111. The bus assembly 1030 and the first housing assembly 1010 in the electric drive assembly 1000 have a relatively simple structure along the Z direction, and the mating distance can be small, resulting in a compact structure. The first sealing structure 31 contacts the first hole wall 112 of the upper protrusion 110 to achieve a seal, thus protecting the first motor 1021.

[0066] A sealing cap 32 is disposed on the first housing assembly 1010 and covers the first hole 111, and can completely cover the upper protrusion 110. An evaporation channel 3210 is provided between the sealing cap 32 and the first housing assembly 1010, communicating between the first hole 111 and the outside. Specifically, the evaporation channel 3210 is disposed on the portion of the sealing cap 32 facing the upper protrusion 110, and the upper protrusion 110 can reduce the inflow of water from the evaporation channel 3210 into the first hole 111. Exemplarily, at least one evaporation channel 3210 may also communicate with the first hole 111, for example, with the upper port of the first hole 111. An evaporation channel 3210 is provided in the sealing cover 32. When external water vapor is drawn into the gap between the sealing cover 32 and the first housing assembly 1010, the heat generated by the operation of the first motor 1021 can be used to evaporate the water vapor, which is then discharged from the evaporation channel 3210. This ensures that the liquid at the manifold assembly 1030 is completely evaporated and discharged, preventing water vapor from remaining and causing water vapor to invade the connection between the first manifold 1 and the first motor 1021. It also prevents the first sealing structure 31 from being directly exposed to the water environment for a long time, thus ensuring sealing performance. Furthermore, the sealing cover 32 has a simple structure and occupies little space. Of course, the evaporation channel 3210 can also be located on the side of the first housing assembly 1010 facing the sealing cover 32, or it can be formed by the sealing cover 32 and the first housing assembly 1010.

[0067] refer to Figure 5 The upper cover 322 of the sealing cap 32 can be a continuous and complete surface to prevent water accumulation and completely seal the evaporation channel 3210. The lower cover 321 of the sealing cap 32 can be provided with multiple evaporation channels 3210. The lower cover 321 of the sealing cap 32 can be a mesh structure to enhance structural strength, with each square recess surrounding the first sealing structure 31 serving as an evaporation channel 3210. (Reference) Figure 7 The internal grid bars of the mesh structure can also be relatively short, so they do not contact the upper protrusion 110. A connecting part can be provided on the outer periphery of the sealing cover 32 to achieve connection and fixation. The upper cover 322 and the lower cover 321 can be integrally stacked, and the specific thickness can be configured according to assembly requirements.

[0068] refer to Figure 2 and Figure 7The sealing structure 1032 may include an insulating shell 311 and a sealing ring 312. Specifically, the first sealing structure 31 may include a first insulating shell and a first sealing ring. The first insulating shell may be a rigid shell, and the first sealing ring may be elastic. The first insulating shell is fitted onto the first connecting end 11. Exemplarily, the first insulating shell may include three segments arranged sequentially approximately along the Z direction, which may be an upper segment 3111, a middle segment, and a lower segment. It should be understood that the middle segment is located between the upper segment 3111 and the lower segment, and does not necessarily have to be exactly in the middle of the whole. The outer diameter of the middle segment is smaller than that of the other two segments, which facilitates the constraint of the first sealing ring. The first sealing ring may also have a positioning protrusion that fits into the notch of the lower segment.

[0069] A gap 102 exists between the first insulating shell and the first hole wall 112. Specifically, a gap 102 exists between the upper section 3111 and the first hole wall 112. The gap 102 in the upper section 3111 can accommodate a small amount of liquid drawn into the space between the first insulating shell and the first hole wall 112, allowing this liquid to evaporate and rise smoothly, avoiding prolonged accumulation, and preventing the first sealing ring from directly contacting a large amount of water. The first sealing ring is fitted onto the first insulating shell and makes sealing contact with the first hole wall 112. The position of the first sealing ring can be low, and there can be a gap between the first sealing ring and the sealing cover 32. The first sealing ring has a sufficient installation and fitting length range to ensure a seal.

[0070] The upper section 3111 may be provided with a buffer groove 3110, which is connected to the gap 102 left in the upper section 3111. The buffer groove 3110 is located between the first sealing ring and the sealing cover 32, which helps to buffer when there is too much water, further preventing the water in the gap 102 from contacting the first sealing ring and reducing the impact on the sealing performance of the sealing ring.

[0071] refer to Figure 5 The first busbar 1 can be used to transmit three-phase electricity, and may include three copper connectors in parallel. The first insulating shell may be provided with multiple buffer slots 3110.

[0072] The first insulating shell can form an integral structure with the sealing cover 32, completely surrounding the busbar.

[0073] refer to Figure 1 , Figure 2 and Figure 3 The first housing assembly 1010 may include a first housing 100 and a second housing 200 axially coupled along the first motor 1021. The first housing 100 includes an upper protrusion 110. The controller 1100 may be located on the first housing 100.

[0074] The first housing 100 also includes a side strip 120 for mating with the second housing 200. The side strip 120 may have screw holes, allowing the first housing 100 and the second housing 200 to be connected and fixed using screws. This facilitates the assembly of the first motor 1021 into the first housing assembly 1010.

[0075] In some embodiments, the first housing 100 further includes a partition 130. The partition 130 and the upper protrusion 110 are used to form a motor cavity with the second housing 200, the motor cavity accommodating the first motor 1021. The side of the partition 130 away from the second housing 200 is used to form a transmission cavity for accommodating a transmission mechanism.

[0076] refer to Figure 4 , Figure 6 and Figure 7 A flow channel 113 is formed between the upper protrusion 110 and the side strip 120. The flow channel 113 connects to the evaporation channel 3210 on the side of the upper protrusion 110 away from the side strip 120. The side strip 120 is used to connect with the second shell 200, while the evaporation channel 3210 on the side of the upper protrusion 110 away from the side strip 120 is directly connected to the outside, having a larger atmospheric flow area, which is beneficial for evaporation. The flow channel 113 can accommodate liquid or condensed liquid drawn from the second shell 200 into the gap between the sealing cover 32 and the first shell assembly 1010, and guide it along route a shown in the figure to the evaporation channel 3210 on the side of the upper protrusion 110 away from the side strip 120, promoting smooth evaporation and ensuring that water vapor around the upper protrusion 110 can evaporate smoothly, avoiding water vapor accumulation; in addition, it helps to reduce the impact of water vapor on the side strip 120. It should be noted that the flow channel 113 is not limited to connecting with the evaporation channel 3210 on the side of the upper protrusion 110 away from the side strip 120 along the route a shown in the figure. It can also connect along other routes, as long as it does not interfere with the upper protrusion 110 or other structures.

[0077] The buffer groove 3110 is located on the side wall of the upper section 3111 that faces away from the second shell 200, and is also as far away from the side strip 120 as possible.

[0078] The controller 1100 is located on the first housing 100, generally on the transmission chamber. The controller 1100 is connected to the first housing 100 and also to the second housing 200. The controller 1100 includes a connecting lug 430 for connecting to the second housing 200. The electric drive assembly 1000 is robust and easy to install. The partition 130 is positioned closer to the circuit connection point 1121 along the Y direction. Figure 2 As shown, the first connecting end 11 and the second connecting end 12 are misaligned along the axial direction of the first motor 1021, and the second connecting end 12 is closer to the maintenance window 401 than the first connecting end 11.

[0079] The controller 1100 includes a second housing assembly 1110. The second housing assembly 1110 may include a third housing 300 and a fourth housing 400. The third housing 300 and the fourth housing 400 are mountable along the Z-direction. The third housing 300 mates with the upper protrusion 110. The fourth housing 400 is disposed on the third housing 300. A connecting lug 430 may be integrally disposed on the side wall panel 410 of the fourth housing 400.

[0080] The second housing assembly 1110 includes a recess 310. The recess 310 can be used to form a third housing 300. The recess 310 is fastened to the upper protrusion 110 and the sealing cap 32, resulting in a compact assembly of the controller 1100, the busbar assembly 1030, and the first housing assembly 1010. The recess 310 arches in a direction away from the upper protrusion 110, thereby forming a cavity on the side of the recess 310 facing the upper protrusion 110 to prevent water accumulation. (Reference) Figure 8 and Figure 9 There is a gap 3101 between the concave portion 310 and the convex portion 110. The gap 3101 is connected to the evaporation channel 3210, ensuring that the evaporation channel 3210 can be connected to the outside through the gap 3101.

[0081] The controller 1100 also includes a circuit assembly 1120. The circuit assembly 1120 is disposed within the second housing assembly 1110 and is electrically connected to the second connection end 12.

[0082] In the illustrated embodiment, there are two motors 1020, namely a first motor 1021 and a second motor (not shown). The second motor is disposed within the first housing assembly 1010. The first motor 1021 and the second motor can be arranged side by side, located on the same side of the partition 130 along the Y direction. The first housing 100 and the second housing 200 may each be provided with a partition plate to separate the first motor 1021 and the second motor. The first motor 1021 can be a P1 motor or an integrated starter motor, and the second motor can be a P3 motor or a direct drive motor. The first motor 1021 and the second motor can be used to perform different functions.

[0083] refer to Figure 9 , Figure 5 and Figure 3Accordingly, there are two busbars 1031, namely a first busbar 1 and a second busbar 2, and two sealing structures 1032, namely a first sealing structure 31 and a second sealing structure 33. The first connecting end 11 of the second busbar 2 passes through the second hole 114 of the upper protrusion 110, and is arranged close to the second motor and electrically connected to the second motor; the second connecting end 12 of the second busbar 2 is electrically connected to the controller 1100; the second sealing structure 33 is sleeved on the first connecting end 11 of the second busbar 2 and makes sealing contact with the second hole wall 115 of the upper protrusion 110. The construction of the second busbar 2 can be similar to that of the first busbar 1, and the construction of the second sealing structure 33 can be similar to that of the first sealing structure 31.

[0084] There are multiple evaporation channels 3210. At least one evaporation channel 3210 is connected to the second hole 114, and at least another evaporation channel 3210 is connected to the first hole 111. The bus assembly 1030 has a compact structure and small size, and the electric drive assembly 1000 has a high degree of integration.

[0085] The first hole 111 and the second hole 114 may be spaced apart. The inner wall of the second hole 114 is the second hole wall 115, and the shape of the second hole wall 115 may be the same as the shape of the first hole wall 112. The two sealing structures, respectively configured to cooperate with the upper protrusion 110, can improve sealing performance. The second sealing structure 33 may include a second insulating shell and a second sealing ring. The second insulating shell and the first insulating shell are both integrally formed on the sealing cover 32, facilitating installation and achieving a high degree of integration.

[0086] Of course, in other embodiments, the number of motors 1020 can also be set to one, three, four or more as needed. The number of busbars 1031 and sealing structures 1032 can also be set to one, three, four or more.

[0087] The bus assembly 1030 also includes a third sealing structure 34, which is fitted onto the second connecting end 12 and passes through the third hole 302 of the controller 1100. The third sealing structure 34 seals the inner wall of the third hole 302, i.e., the third hole wall 301, in contact with the third hole 302. The third sealing structure 34 can achieve a seal and protect the controller 1100. The entire bus assembly 1030 is installed along the Z direction, which is easy to install and adjust. It should be noted that when the bus 1031 includes a first bus 1 and a second bus 2, the third sealing structure 34 can be fitted onto both second connecting ends 12 simultaneously, or the two third sealing structures 34 can be fitted onto the two second connecting ends 12 respectively.

[0088] The third sealing structure 34 may include a third insulating shell and a third sealing ring. The third insulating shell and the sealing cover 32 may be integrally formed. The third sealing structure 34 surrounds the second connecting end 12, and the sealing body 3 has good structural strength. The recessed portion 310 of the second housing assembly 1110 has a simple structure, requiring only a third hole 302 to fit the third sealing structure 34.

[0089] Combination Figure 2 and Figure 3 As shown, the circuit assembly 1120 includes a circuit connection point 1121 and a screwing component 1122. The screwing component 1122 passes through the circuit connection point 1121 and the second connection end 12 along the axial direction of the first motor 1021. The screwing component 1122 can be a screw or a bolt, which is tightened and fixed using a threaded structure.

[0090] refer to Figure 10 The second housing assembly 1110 includes a sidewall panel 410 and a cover plate 420. The sidewall panel 410 has a maintenance window 401 projected axially along the first motor 1021 onto the second connection end 12 of the first busbar 1; exemplarily, another maintenance window 401 is projected axially along the second motor onto the second connection end 12 of the second busbar 2. Specifically, the maintenance window 401 exposes the screw mechanism 1122. The maintenance window 401 may be slightly larger than the operating space required for the three screw mechanisms 1122. The maintenance window 401 may be large enough to be partitioned.

[0091] The cover plate 420 is used to cover the maintenance window 401. The cover plate 420 is bolted to the side wall plate 410, which is easy to disassemble and is waterproof and dustproof. After assembling the controller 1100, the circuit connection point 1121 and the second connection end 12 can also be connected or disconnected, which is easy to install and maintain.

[0092] The axial direction of the first motor 1021 and the axial direction of the second motor can be parallel, and both can be approximately parallel to the Y direction.

[0093] The installation direction of the power module in the controller 1100 can be adjusted based on the position of the circuit connection point 1121. The side with the circuit connection point 1121 is placed towards the rear end cover of the motor (the rear end of the motor winding). The bus assembly 1030 is housed in the second housing assembly 1110 of the controller 1100 and is also positioned close to the rear end cover of the motor. In this way, the circuit connection point 1121 of the power module in the controller 1100, the connection point of the bus assembly 1030, the connection point of the first motor 1021, and the connection point of the second motor are all located on the same side of the controller 1100 and close to the rear end cover of the motor along the axis of the motor. The circuit connection point 1121 and the connection point of the motor correspond to each other, so that each connection end of the bus assembly 1030 can be connected vertically downwards, resulting in a shorter wiring path.

[0094] The bus assembly 1030 is connected to the circuit connection point 1121 and the motor connection point by bolts screwed in along the motor axial direction. The controller 1100 is provided with a maintenance window 401, which can avoid opening the controller 1100 housing and thus avoid damage to the internal structure of the controller 1100 during operation. Optionally, the first housing assembly 1010 can also have an installation window to avoid accidental collisions to the motor during operation.

[0095] refer to Figure 11 This application provides a vehicle 3000, which includes an electric drive assembly 1000. The electric drive assembly 1000 may be the same as the electric drive assembly 1000 described in the previous embodiments. The vehicle 3000 of this application embodiment can make better use of the interior space and can operate safely.

[0096] For example, vehicle 3000 may also include internal combustion engine 2000. Internal combustion engine 2000 is drive-coupled to electric drive assembly 1000, and vehicle 3000 may be a hybrid vehicle. Vehicle 3000 may also include planetary gears or other forms of gear sets to achieve transmission.

[0097] The technical features of the above-disclosed embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] In the embodiments disclosed above, unless otherwise explicitly specified and limited, the execution order of each step is not restricted. For example, they can be executed in parallel or sequentially in different orders. The sub-steps of each step can also be executed alternately. Various forms of processes described above can be used, and steps can be reordered, added, or deleted, as long as the desired result of the technical solution provided in this application can be achieved, and this application does not impose any restrictions here.

[0099] The embodiments disclosed above merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of patent protection claimed by this application. Therefore, the scope of patent protection of this application should be determined by the appended claims.

Claims

1. An electric drive assembly, characterized in that, include: The first housing assembly (1010) has a connecting hole (101). The motor (1020) is disposed within the first housing assembly (1010); Controller (1100), disposed on the first housing assembly (1010); and The bus assembly (1030) includes a bus (1031), a sealing structure (1032), and a sealing cap (32). The bus (1031) includes a first connecting end (11) and a second connecting end (12). The first connecting end (11) passes through the connecting hole (101) and is arranged near the motor (1020) and electrically connected to the motor (1020) to utilize the temperature of the motor (1020) for heating. The second connecting end (12) is electrically connected to the first connecting end (11) and the controller (1100). The sealing structure (1032) is sleeved on the first connecting end (11) and seals against the inner wall of the connecting hole (101). The sealing cap (32) is disposed on the first housing assembly (1010) and covers the connecting hole (101), and there is an evaporation channel (3210) between the sealing cap (32) and the first housing assembly (1010) connecting the connecting hole (101) and the outside.

2. The electric drive assembly according to claim 1, characterized in that, The sealing structure (1032) includes an insulating shell (311) and a sealing ring (312). The insulating shell (311) is sleeved on the first connecting end (11), and the sealing ring (312) is sleeved on the insulating shell (311) and makes a sealing contact with the inner wall of the connecting hole (101). The insulating shell (311) includes an upper section (3111) located between the sealing ring (312) and the sealing cover (32), and the upper section (3111) and the inner wall of the connecting hole (101) have a gap (102) communicating with the evaporation channel (3210).

3. The electric drive assembly according to claim 2, characterized in that, The upper section (3111) is provided with a buffer groove (3110) that communicates with the gap (102).

4. The electric drive assembly according to claim 1, characterized in that, The first housing assembly (1010) includes an upper protrusion (110), a connecting hole (101) is provided on the upper protrusion (110), and a sealing cap (32) is provided on the upper protrusion (110).

5. The electric drive assembly according to claim 4, characterized in that, The first housing assembly (1010) includes a first housing (100) and a second housing (200) axially connected to the motor (1020). The first housing (100) includes the upper protrusion (110) and a side strip (120) for engaging the second housing (200). A flow channel (113) is formed between the upper protrusion (110) and the side strip (120), and the flow channel (113) communicates with the evaporation channel (3210) on the side of the upper protrusion (110) away from the side strip (120).

6. The electric drive assembly according to claim 4, characterized in that, The controller (1100) includes a second housing assembly (1110) and a circuit assembly (1120). The second housing assembly (1110) includes a recess (310) which is fastened to the upper protrusion (110) and the sealing cover (32). The circuit assembly (1120) is disposed inside the second housing assembly (1110) and is electrically connected to the second connection end (12).

7. The electric drive assembly according to claim 6, characterized in that, The circuit assembly (1120) includes a circuit connection point (1121) and a screwing component (1122), the screwing component (1122) passing through the circuit connection point (1121) and the second connection end (12) along the axial direction of the motor (1020). The second housing assembly (1110) includes a side wall panel (410) and a cover plate (420), the side wall panel (410) having a maintenance window (401) projected along the axial direction of the motor (1020) onto the screw (1122), and the cover plate (420) for covering the maintenance window (401).

8. The electric drive assembly according to claim 7, characterized in that, The first connecting end (11) and the second connecting end (12) are misaligned along the axial direction of the motor (1020), and the second connecting end (12) is closer to the maintenance window (401) than the first connecting end (11).

9. The electric drive assembly according to claim 1, characterized in that, The number of the connecting holes (101) is at least two, namely the first hole (111) and the second hole (114), and the number of the motors (1020) is at least two, namely the first motor (1021) and the second motor; The number of busbars (1031) is at least two, namely a first busbar (1) and a second busbar (2); the first connecting end (11) of the first busbar (1) passes through the first hole (111), and is arranged near the first motor (1021) and electrically connected to the first motor (1021); the first connecting end (11) of the second busbar (2) passes through the second hole (114), and is arranged near the second motor and electrically connected to the second motor; The number of sealing structures (1032) is at least two, namely a first sealing structure (31) and a second sealing structure (33); the first sealing structure (31) is sleeved on the first connecting end (11) of the first busbar (1) and seals against the inner wall of the first hole (111); the second sealing structure (33) is sleeved on the first connecting end (11) of the second busbar (2) and seals against the inner wall of the second hole (114).

10. The electric drive assembly according to claim 9, characterized in that, The number of evaporation channels (3210) is multiple, at least one of the evaporation channels (3210) is connected to the second hole (114), and at least another evaporation channel (3210) is connected to the first hole (111).

11. The electric drive assembly according to claim 4, characterized in that, The first housing assembly (1010) includes a first housing (100) and a second housing (200) axially joined to the motor (1020). The first housing (100) includes a partition (130) and an upper protrusion (110). The partition (130), the upper protrusion (110), and the second housing (200) together form a motor cavity. The side of the partition (130) away from the second housing (200) is used to form a speed change cavity. The controller (1100) is located on the transmission chamber.

12. The electric drive assembly according to claim 11, characterized in that, The controller (1100) is connected to the first housing (100) and to the second housing (200).

13. The electric drive assembly according to claim 1, characterized in that, The busbar assembly (1030) further includes a third sealing structure (34), which is sleeved on the second connection end (12). The third sealing structure (34) passes through the third hole (302) of the controller (1100) and seals against the inner wall of the third hole (302).

14. A vehicle, characterized in that, Includes the electric drive assembly (1000) as described in any one of claims 1 to 13.

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