Dual-motor electric drive assembly and electric drive system thereof

Abstract

The application belongs to the technical field of electric drive systems, and provides a double-motor electric drive assembly and an electric drive system thereof, which comprises an electric drive shell and a controller shell, the electric drive shell comprises a differential shell, a first motor shell and a second motor shell, the first motor shell and the second motor shell are respectively connected to two sides of the differential shell, the volume of the first motor shell is greater than the volume of the second motor shell, and the top of the first motor shell is higher than the top of the second motor shell to form an avoiding space, and the controller shell is arranged in the avoiding space. The shell structure of the whole double-motor electric drive system can be more compact, small in volume, higher in integration, and convenient for improving the space utilization.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of electric drive systems, and in particular, relates to a double-motor electric drive assembly and an electric drive system thereof. BACKGROUND

[0002] In the existing double-motor electric drive system, the volumes of the two motors are consistent, and a symmetrical layout is usually adopted, such as a common T-shaped layout. However, in this structure, the electric drive controller needs to be arranged on the top of the electric drive shell, which significantly increases the Z-direction size of the electric drive system, and the space utilization is not reasonable. When installing, the vehicle body end often needs to be structurally avoided, and the overall space utilization is low. Moreover, the connection between the electric drive controller and the motors needs to be performed through high-voltage and low-voltage wire groups, and each wire group is wound on the electric drive shell, which leads to a complex overall wiring structure and high maintenance difficulty. SUMMARY

[0003] In order to overcome at least one of the above-mentioned disadvantages of the prior art, the purpose of the present application is to provide a double-motor electric drive assembly and an electric drive system thereof.

[0004] The technical means adopted by the present application to solve the above technical problems is:

[0005] The present application provides a double-motor electric drive assembly, which comprises:

[0006] The electric drive shell comprises a difference shell, a first motor shell and a second motor shell, the first motor shell and the second motor shell are respectively connected to the two sides of the difference shell, the volume of the first motor shell is greater than that of the second motor shell, and the top of the first motor shell is higher than that of the second motor shell to form an avoiding space;

[0007] The end of the first motor shell away from the difference shell is provided with a first low-voltage connection port, and the end of the first motor shell close to the difference shell is provided with a first high-voltage connection port; the end of the second motor shell away from the difference shell is provided with a second low-voltage connection port and a second high-voltage connection port;

[0008] The controller shell is arranged in the avoiding space, and is connected to the first low-voltage connection port through a cable; one end of the controller shell is arranged on the second motor shell and communicates with the second low-voltage connection port and the second high-voltage connection port; the other end of the controller shell extends towards the first motor shell and communicates with the first high-voltage connection port.

[0009] In some embodiments, a high-voltage bus interface is mounted on the controller shell, and a rotation angle exists between the high-voltage bus interface and the mounting plane thereof.

[0010] The rotation angle is between 3°-15°.

[0011] In some embodiments, a high-voltage adapter is arranged in the first high-voltage connection port, the bottom of the high-voltage adapter is connected with the high-voltage copper bar in the first motor shell, and the top of the high-voltage adapter is connected with the high-voltage copper bar in the controller shell.

[0012] In some embodiments, the controller shell comprises:

[0013] a bottom shell, a bottom cover of the bottom shell covers the first high-voltage connection port, the second low-voltage connection port, and the second high-voltage connection port, and a first high-voltage inner cavity for mounting a high-voltage module is arranged in the bottom shell;

[0014] a middle shell mounted on the bottom shell, a low-voltage inner cavity for mounting a low-voltage module is arranged in the middle shell;

[0015] a controller cover plate mounted on the middle shell.

[0016] In some embodiments, a second high-voltage inner cavity is arranged in the middle shell, the second high-voltage inner cavity is independent of the low-voltage inner cavity, and the second high-voltage inner cavity is in communication with the first high-voltage inner cavity.

[0017] The controller cover plate comprises a first cover plate and a second cover plate, the first cover plate is mounted on the low-voltage inner cavity, and the second cover plate is mounted on the second high-voltage inner cavity.

[0018] In some embodiments, a plurality of ribs are arranged on the first cover plate and / or the second cover plate.

[0019] In some embodiments, an electrical installation cavity is arranged on the end side of the second motor shell away from the difference shell, and a first side cover for covering the electrical installation cavity is arranged.

[0020] The second low-voltage connection port and the second high-voltage connection port are arranged on the top side wall of the electrical installation cavity, the second low-voltage connection port is plugged with the controller shell, and the high-voltage copper bar in the controller shell extends into the electrical installation cavity.

[0021] In some embodiments, a shell outer cover is arranged on the end of the first motor shell away from the difference shell, a lead installation cavity is arranged on the outer side of the shell outer cover, and a second side cover for covering the lead installation cavity is arranged.

[0022] The first low-voltage connection port is arranged on the side wall structure of the shell outer cover.

[0023] In some embodiments, two ends of the cable are respectively connected with the first low-voltage connection port and the controller shell;

[0024] The first motor shell is provided with a lead locking buckle, and the middle part of the cable is arranged on the lead locking buckle.

[0025] In addition, the application further provides an electric drive system, which comprises the double-motor electric drive assembly as described above.

[0026] Compared with the prior art, the application has at least the following beneficial effects:

[0027] In the application, the first motor shell and the second motor shell with different volumes are arranged in a staggered manner to form the avoiding space, and the controller shell is arranged in the avoiding space, so that the shell structure of the entire double-motor electric drive system can be more compact, small in volume, high in integration, and convenient for improving the space utilization. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments of the application. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 An application schematic diagram of the double-motor electric drive assembly of one of the embodiments of the application.

[0030] Figure 2 A top view structural schematic diagram of the double-motor electric drive assembly of one of the embodiments of the application.

[0031] Figure 3 A front view structural schematic diagram of the double-motor electric drive assembly of one of the embodiments of the application.

[0032] Figure 4 A front view structural schematic diagram of the electric drive shell of one of the embodiments of the application.

[0033] Figure 5 A structural schematic diagram of the electric drive shell of one of the embodiments of the application.

[0034] Figure 6 A sectional view structural schematic diagram of the high-voltage adapter installation position of one of the embodiments of the application.

[0035] Figure 7 A structural schematic diagram of the controller shell of one of the embodiments of the application.

[0036] Figure 8 Structure diagram of a first high-pressure inner cavity according to an example of the present application.

[0037] Figure 9 Structure diagram of a first high-pressure inner cavity according to an example of the present application.

[0038] Figure 10 Structure diagram of a double-motor electric drive assembly according to an example of the present application.

[0039] Figure 11 Structure diagram of an electrical installation cavity according to an example of the present application.

[0040] Figure 12 Structure diagram of a lead installation cavity according to an example of the present application.

[0041] Label description:

[0042] 1 - electric drive shell, 11 - difference shell, 12 - first motor shell, 121 - first low-voltage connection port, 122 - first high-voltage connection port, 123 - shell outer cover, 1231 - lead installation cavity, 124 - second side cover, 13 - second motor shell, 131 - second low-voltage connection port, 132 - second high-voltage connection port, 133 - electrical installation cavity, 134 - first side cover, 14 - avoidance space;

[0043] 2 - controller shell, 21 - high-voltage bus interface, 211 - box structure, 22 - rotation angle, 23 - bottom shell, 231 - first high-voltage inner cavity, 232 - first bottom end face, 233 - second bottom end face, 24 - middle shell, 241 - low-voltage inner cavity, 242 - second high-voltage inner cavity, 25 - controller cover plate, 251 - first cover plate, 252 - second cover plate, 253 - convex rib;

[0044] 3 - cable, 31 - lead lock;

[0045] 4 - high-voltage adapter; 5 - high-voltage module; 6 - low-voltage module. DETAILED DESCRIPTION

[0046] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in detail below with reference to the drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. In the following description, a large number of specific details are described in order to facilitate a full understanding of the present application, and the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0047] It should be noted that unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Like reference numerals and letters in the various drawings are intended to represent similar components unless otherwise specified. Also, in the description herein, relative terms are used to generally describe the relative position of one component to another component. These relative terms are intended to encompass different positional relationships between the components.

[0048] As shown in the embodiment, a double-motor electric drive assembly is provided, which comprises: Figures 1 to 12

[0049] An electric drive shell 1 is provided, which comprises a differential shell 11, a first motor shell 12 and a second motor shell 13. The first motor shell 12 and the second motor shell 13 are respectively connected to two sides of the differential shell 11. The volume of the first motor shell 12 is greater than that of the second motor shell 13, and the top of the first motor shell 12 is higher than that of the second motor shell 13 to form an avoiding space 14.

[0050] A first low-voltage connection port 121 is arranged at the end of the first motor shell 12 away from the differential shell 11, and a first high-voltage connection port 122 is arranged at the end of the first motor shell 12 close to the differential shell 11. A second low-voltage connection port 131 and a second high-voltage connection port 132 are arranged at the end of the second motor shell 13 away from the differential shell 11.

[0051] A controller shell 2 is arranged in the avoiding space 14. The controller shell 2 is connected to the first low-voltage connection port 121 through a cable 3. One end of the controller shell 2 is arranged on the second motor shell 13 and communicates with the second low-voltage connection port 131 and the second high-voltage connection port 132. The other end of the controller shell 2 extends towards the first motor shell 12 and communicates with the first high-voltage connection port 122.

[0052] In some embodiments, a differential assembly is arranged in the differential shell 11, a first motor is arranged in the first motor shell 12, and a second motor is arranged in the second motor shell 13. The power output ends of the first motor and the second motor are drivingly connected to the differential assembly, so that power is output through the power output end of the differential assembly.

[0053] ​In some embodiments, the volume of the first motor housing 12 is greater than the volume of the second motor housing 13, which can also be understood as the volume of the first motor being greater than the volume of the second motor; or it can be understood that the power of the first motor is greater than the power of the second motor.

[0054] In some embodiments, as shown in Figure 3 , Figure 4 The bottom of the second motor housing 13 is close to the bottom of the difference housing 11 and the first motor housing 12, and the top of the second motor housing 13 is lower than the top of the first motor housing 12, thereby forming the avoidance space 14; and when the controller housing 2 is installed in the avoidance space 14, the top of the controller housing 2 is close to the top of the first motor housing 12.

[0055] In this structure, through the misalignment design between the first motor housing 12 and the second motor housing 13, the centroid of the shell structure of the dual-motor electric drive system is still in the middle position, and the avoidance space 14 formed can be used for the installation of the controller housing 2, the overall structural layout is more compact, and the space design and utilization can be more reasonable, facilitating the control of the Z-direction size of the shell structure after molding.

[0056] In some embodiments, as shown in Figure 5 The first high-voltage connection port 122 is arranged at the end of the first motor housing 12 close to the difference housing 11, and the second high-voltage connection port 132 is arranged at the end of the second motor housing 13 away from the difference housing 11; so that when electrically connected, the high-voltage connection ends of the two motors are respectively located at the two ends of the controller housing 2, so that a long enough arrangement interval can be obtained to reduce electromagnetic interference.

[0057] In addition, since one end of the controller housing 2 is arranged on the second motor housing 13 and communicates with the second low-voltage connection port 131 and the second high-voltage connection port 132, and the other end extends and communicates with the first high-voltage connection port 122, after the shell structure is formed, the shell structure has only the cable 3 connected between the controller housing 2 and the first low-voltage connection port 121, i.e. one external cable, and the overall wiring layout is simpler and more convenient to maintain.

[0058] As one of the application examples, as shown in Figure 2 The controller housing 2 is provided with a high-voltage bus interface 21, and there is a rotation angle 22 between the high-voltage bus interface 21 and the installation plane thereof;

[0059] The rotation angle 22 is between 3° and 15°.

[0060] In some embodiments, the high-voltage bus interface 21 is arranged on the controller housing 2 towards the upper side, and a box structure 211 for mounting the high-voltage bus interface 21 is arranged on the controller housing 2, the box structure 211 has a rectangular top view shape, and the high-voltage bus interface 21 also has a rectangular outer shape; wherein, in the top view state, the rotation angle 22 is formed between the center line of the box structure 211 and the center line of the high-voltage bus interface 21.

[0061] In some embodiments, the rotation angle 22 is set to 5°.

[0062] In the traditional technology, the high-voltage bus interface 21 is usually arranged on the controller housing 2 in alignment, that is, the center line of the high-voltage bus interface 21 coincides with the center line of the box structure 211; but in actual application, it is found that in this form of alignment installation, the head of the external high-voltage connecting line needs to be rotated at a certain angle to be connected with the high-voltage bus interface 21, and the overall diameter of the external high-voltage connecting line is large, so it is very laborious to rotate, and the assembly is troublesome. Moreover, the external high-voltage connecting line after installation is also under the influence of torque for a long time, which affects the service life of the interface. In the embodiment, the rotation angle 22 is arranged to facilitate the connection of the external high-voltage connecting line with the high-voltage bus interface 21 in the natural state; and the size of the rotation angle 22 is designed to facilitate the consideration of the internal wire arrangement angle of the controller housing 2 and the access angle of the external high-voltage connecting line, and the overall use effect is better.

[0063] As one of the application examples, as shown in Figure 5 , Figure 6 The first high-voltage connecting port 122 is provided with a high-voltage adapter 4, the bottom of the high-voltage adapter 4 is connected with the high-voltage copper bar in the first motor housing 12, and the top of the high-voltage adapter 4 is connected with the high-voltage copper bar in the controller housing 2.

[0064] In some embodiments, the high-voltage adapter 4 is a three-phase adapter, and the high-voltage adapter 4 is vertically installed on the first motor housing 12, and the top of the high-voltage adapter 4 extends into the controller housing 2.

[0065] The high-voltage adapter 4 is arranged to facilitate the electrical connection between the first motor in the first motor housing 12 and the high-voltage module in the controller housing 2, and in this connection mode, the high-voltage copper bars of the first motor and the high-voltage module are basically straight out for connection, so that the high-voltage copper bars can be more naturally out, and the path of the high-voltage copper bars can be designed to be shorter.

[0066] As one of the application examples, as shown in Figures 6 to 8 The controller housing 2 comprises:

[0067] A bottom housing 23, a bottom cover of the bottom housing 23 is arranged on the first high-voltage connection port 122, the second low-voltage connection port 131, and the second high-voltage connection port 132, and a first high-voltage inner cavity 231 for mounting the high-voltage module 5 is arranged in the bottom housing 23;

[0068] An intermediate housing 24 mounted on the bottom housing 23, and a low-voltage inner cavity 241 for mounting the low-voltage module 6 is arranged in the intermediate housing 24;

[0069] A controller cover plate 25 mounted on the intermediate housing 24.

[0070] In some embodiments, the high-voltage module 5 is used to control the operation of the high-voltage loop of the system, and the low-voltage module 6 is used to control the operation of the low-voltage loop of the system. The structure of the high-voltage module 5 and the low-voltage module 6 can refer to the prior art, which will not be described here.

[0071] In some embodiments, the bottom housing 23 is arranged in a "Z" shape, comprising a first bottom end surface 232 and a second bottom end surface 233, and the height of the second bottom end surface 233 is higher than that of the first bottom end surface 232. When installed, the first bottom end surface 232 covers the second motor housing 232 to facilitate communication between the second low-voltage connection port 131 and the second high-voltage connection port 132; and the second bottom end surface 233 is arranged in extension and located on the first motor housing 12 to facilitate communication between the first high-voltage connection port 122.

[0072] In some embodiments, the intermediate housing 24 and the bottom housing 23 are detachably connected by bolts or other fasteners, so that when maintenance is performed, the high-voltage module 5 in the first high-voltage inner cavity 231 can be directly maintained by detaching the intermediate housing 24 from the bottom housing 23.

[0073] In some embodiments, the controller cover plate 25 and the intermediate housing 24 are detachably connected by bolts or other fasteners, so that when maintenance is performed, the low-voltage module 6 in the low-voltage inner cavity 241 can be directly maintained by detaching the controller cover plate 25 from the intermediate housing 24.

[0074] As one of the application examples, as shown in Figure 7 , Figure 8As shown, the intermediate casing 24 is provided with a second high-pressure inner cavity 242, which is independent of the low-pressure inner cavity 241 and is in communication with the first high-pressure inner cavity 231.

[0075] The controller cover plate 25 comprises a first cover plate 251 and a second cover plate 252, the first cover plate 251 is installed on the low-pressure inner cavity 241, and the second cover plate 252 is installed on the second high-pressure inner cavity 242.

[0076] In some embodiments, the high-pressure adapter 4 extends into the second high-pressure inner cavity 242.

[0077] By setting the controller cover plate 25 to comprise the first cover plate 251 and the second cover plate 252, when performing maintenance operations, the actual maintenance object can be operated, improving maintenance efficiency. For example, when the low-pressure module 6 needs to be maintained, only the first cover plate 251 can be removed; when the high-pressure adapter 4 needs to be maintained, only the second cover plate 252 can be removed, which is more convenient to use. And the second high-pressure inner cavity 242 is independent of the low-pressure inner cavity 241, and the first cover plate 251 is independent of the second cover plate 252, which is also safer and more reliable to use.

[0078] As one of the application examples, as shown in Figure 2 , Figure 7 The first cover plate 251 and / or the second cover plate 252 are provided with a plurality of ribs 253.

[0079] In some embodiments, the first cover plate 251 is provided with a plurality of ribs 253, so as to improve the modal of the first cover plate 251 through the ribs 253 and reduce the operating noise.

[0080] In some embodiments, the second cover plate 252 is provided with the ribs 253.

[0081] In some embodiments, the ribs 253 and the first cover plate 251 where the ribs 253 are located, and the ribs 253 and the second cover plate 252 where the ribs 253 are located are integrally formed, such as stamping forming, casting forming and the like.

[0082] As one of the application examples, as shown in Figure 10 , Figure 11 The second motor casing 12 is provided with an electrical installation cavity 133 on the end side of the difference casing 11 away from the difference casing 11, and a first side cover 134 for covering the electrical installation cavity 133.

[0083] The second low-voltage connection port 131 and the second high-voltage connection port 132 are arranged on the top side wall of the electrical installation cavity 133, the second low-voltage connection port 131 is plugged with the controller housing 2, and the high-voltage copper bar in the controller housing 2 extends into the electrical installation cavity 133.

[0084] In some embodiments, the electrical installation cavity 133 is formed on the second motor housing 12, such as an integral structure forming, so that the overall structural strength can be more reliable.

[0085] In some embodiments, the second low-voltage connection port 131 and the controller housing 2 are plugged through a male and female joint and achieve electrical communication.

[0086] In some embodiments, the high-voltage copper bar in the controller housing 2 extends into the electrical installation cavity 133 and is connected with the high-voltage copper bar of the second motor.

[0087] Through the arrangement of the first side cover 134, the electrical installation cavity 133 can be covered, and after the first side cover 134 is removed, subsequent maintenance operation can be facilitated.

[0088] As one of the application examples, as shown in Figure 12 The end of the first motor housing 12 away from the difference shell 11 is provided with a shell outer cover 123, and the outer side of the shell outer cover 123 is provided with a lead installation cavity 1231 and a second side cover 124 for covering the lead installation cavity 1231.

[0089] The first low-voltage connection port 121 is arranged on the side wall structure of the shell outer cover 123.

[0090] Through the arrangement of the shell outer cover 123, the installation of the first motor in the first motor housing 12 can be facilitated; and through the arrangement of the second side cover 124, the lead installation cavity 1231 can be covered, and after the second side cover 124 is removed, subsequent maintenance operation can be facilitated.

[0091] As one of the application examples, as shown in Figure 1 , Figure 12 The two ends of the cable 3 are respectively plugged with the first low-voltage connection port 121 and the controller housing 2.

[0092] The first motor housing 12 is provided with a lead lock 31, and the middle part of the cable 3 is arranged on the lead lock 31.

[0093] Through the plug connection between the cable 3 and the first low-voltage connection port 121 and the controller shell 2, the electrical connection between the first low-voltage connection port 121 and the low-voltage module 6 in the controller shell 2 can be facilitated, and the connection operation is simple and convenient. Through the lead lock 31, the external structure of the first motor shell 12 can be fully utilized, and the middle part of the cable 3 can be limited, so as to improve the state stability of the cable 3 after electrical connection.

[0094] In addition, the embodiment also provides an electric drive system, wherein the electric drive system applies the double-motor electric drive assembly.

[0095] Compared with the prior art, the embodiment has at least the following beneficial effects:

[0096] In the embodiment, the first motor shell 12 and the second motor shell 13 with different volumes are arranged in a staggered manner to form the avoiding space 14, and the controller shell 2 is arranged in the avoiding space 14, so that the shell structure of the entire double-motor electric drive system can be more compact, small in volume, higher in integration, and convenient for improving the space utilization.

[0097] The above is only a specific implementation of the present application and does not limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall also be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

[0098] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A dual-motor electric drive assembly, comprising: The application relates to an electric drive shell. The electric drive shell comprises a differential shell, a first motor shell and a second motor shell, the first motor shell and the second motor shell are connected to the two sides of the differential shell respectively, the volume of the first motor shell is larger than that of the second motor shell, and the top of the first motor shell is higher than that of the second motor shell to form an avoiding space. The end of the first motor shell away from the differential shell is provided with a first low-voltage connecting port, and the end of the first motor shell close to the differential shell is provided with a first high-voltage connecting port; the end of the second motor shell away from the differential shell is provided with a second low-voltage connecting port and a second high-voltage connecting port. A controller shell is arranged in the avoiding space, and the controller shell is connected with the first low-voltage connecting port through a cable; one end of the controller shell is arranged on the second motor shell and communicates with the second low-voltage connecting port and the second high-voltage connecting port; the other end of the controller shell extends towards the first motor shell and communicates with the first high-voltage connecting port. A high-voltage busbar interface is arranged on the controller shell, and a rotation angle exists between the high-voltage busbar interface and the mounting plane thereof; the rotation angle is between 3 DEG and 15 DEG.

2. The dual-motor electric drive assembly of claim 1, wherein, A high-voltage adapter is arranged in the first high-voltage connecting port, the bottom of the high-voltage adapter is connected with a high-voltage copper bar in the first motor shell, and the top of the high-voltage adapter is connected with a high-voltage copper bar in the controller shell.

3. The dual-motor electric drive assembly of claim 2, wherein, The controller shell comprises: a bottom shell, the bottom of the bottom shell is covered on the first high-voltage connecting port, the second low-voltage connecting port and the second high-voltage connecting port, and a first high-voltage inner cavity for high-voltage module installation is arranged in the bottom shell; an intermediate shell is arranged on the bottom shell, and a low-voltage inner cavity for low-voltage module installation is arranged in the intermediate shell; a controller cover plate is arranged on the intermediate shell.

4. The dual-motor electric drive assembly of claim 3, wherein, A second high-voltage inner cavity is arranged in the intermediate shell, the second high-voltage inner cavity and the low-voltage inner cavity are independent of each other, and the second high-voltage inner cavity communicates with the first high-voltage inner cavity. The controller cover plate comprises a first cover plate and a second cover plate, the first cover plate is arranged on the low-voltage inner cavity, and the second cover plate is arranged on the second high-voltage inner cavity.

5. The dual-motor electric drive assembly of claim 4, wherein, A plurality of ribs are arranged on the first cover plate and / or the second cover plate.

6. The dual-motor electric drive assembly of claim 4, wherein, An electrical installation cavity and a first side cover for covering the electrical installation cavity are arranged on the end side of the second motor shell away from the differential shell. The second low-voltage connecting port and the second high-voltage connecting port are arranged on the top side wall of the electrical installation cavity, the second low-voltage connecting port is inserted into the controller shell, and a high-voltage copper bar in the controller shell extends into the electrical installation cavity.

7. The dual-motor electric drive assembly of claim 6, wherein, A shell outer cover is arranged on the end of the first motor shell away from the differential shell, a lead installation cavity and a second side cover for covering the lead installation cavity are arranged on the outer side of the shell outer cover. The first low-voltage connecting port is arranged on the side wall structure of the shell outer cover.

8. The dual-motor electric drive assembly of claim 7, wherein, Two ends of the cable are respectively connected with the first low-voltage connection port and the controller shell; The first motor shell is provided with a lead lock, and the middle part of the cable is arranged on the lead lock.

9. An electric drive system characterized by, The electric drive system comprises the double-motor electric drive assembly according to any one of claims 1-8.

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