CN114312295A

CN114312295A - Integrated form electric drive system and electric automobile

Info

Publication number: CN114312295A
Application number: CN202011058450.8A
Authority: CN
Inventors: 凌和平; 翟震; 胡磊; 熊雨超; 黄日
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2022-04-12
Anticipated expiration: 2040-09-30
Also published as: CN114312295B

Abstract

The invention belongs to the technical field of electric automobiles, and particularly relates to an integrated electric drive system and an electric automobile. The integrated electric drive system comprises a motor body, a speed reducer body, an integrated shell and a controller connected with the motor body; the motor output shaft of the motor body is connected with the speed reducer input shaft of the speed reducer body; the integrated shell comprises a support shell for supporting the controller, a motor outer shell for mounting the motor body, and a speed reducer shell for mounting the speed reducer body; the supporting shell is arranged above the motor outer shell and the speed reducer shell. The integrated shell is designed, so that the integration level, the compactness and the reliability of the integrated electric drive system are improved, and the mode of the integrated electric drive system and the NVH performance of an automobile are improved.

Description

Integrated form electric drive system and electric automobile

Technical Field

The invention belongs to the technical field of electric automobiles, and particularly relates to an integrated electric drive system and an electric automobile.

Background

The electric drive system is a core component of an electric automobile, and with the continuous development of new energy automobiles, the arrangement requirement of the automobile drive system is higher. The electric drive system is formed by combining a drive motor, a motor controller, a speed changer, an air compressor, a water pump, a vehicle controller, a vehicle-mounted charger, a direct current converter and the like. In the prior art, an integrated control shell of an electric drive system is usually installed at the top of a stator shell of a drive motor, a transmission is installed at the output shaft end of the drive motor, and an air compressor is hung on the transmission through a bracket; however, such an integrated electric drive system has the disadvantages of heavy overall weight, low integration level, large housing space, high costs for molds and materials, and the like.

Disclosure of Invention

The invention solves the technical problems of low integration level, large shell space and the like of an electric drive system in the prior art, and provides an integrated electric drive system and an electric automobile.

In view of the above problems, an integrated electric drive system provided by an embodiment of the present invention includes a motor body, a reducer body, an integrated housing, and a controller connected to the motor body; the motor output shaft of the motor body is connected with the speed reducer input shaft of the speed reducer body; the integrated shell comprises a supporting shell for supporting the controller, a motor outer shell for mounting the motor body, and a speed reducer shell for mounting the speed reducer body; the supporting shell is arranged above the motor outer shell and the speed reducer shell.

Optionally, the integrated electric drive system further includes an electric control housing, a mounting groove for mounting the controller is formed in the electric control housing, and a notch edge of the mounting groove of the electric control housing is connected to the upper end surface of the support housing; and a cooling water channel for cooling the controller is arranged on the supporting shell.

Optionally, a battery installation space with an opening facing the installation groove is further formed in the support shell; the integrated electric drive system further includes a battery mounted in the battery mounting space.

Optionally, the integrated electric drive system further comprises an air conditioner compressor and a water pump both mounted on the reducer housing; the air conditioner compressor and the water pump are both connected with the controller.

Optionally, the controller includes a dc bus mounted on the electronic control housing, and a first integrated module and a second integrated module both mounted in the mounting groove; the first integrated module is connected with an automobile power battery;

the second integrated module comprises a capacitor module, an IGBT module and a three-phase copper bar; the capacitor module is connected with an automobile power battery through the direct current bus; the three-phase copper bar is connected with a three-phase terminal of the motor body; the automobile power battery drives the motor body to rotate through the direct-current bus, the capacitor module, the IGBT module and the three-phase copper bar which are connected in sequence.

Optionally, the controller further comprises a low-voltage connector, a contactor, a direct-current charging line and an alternating-current charging line; the alternating current charging wire with the low voltage connector is all connected first collection moulding piece, the direct current charging wire passes through the contactor is connected the three-phase copper bar.

Optionally, the controller comprises a first integrated module and a second integrated module; the mounting groove comprises a first inner space and a second inner space which are both arranged in a rectangular shape and are adjacent to each other; the first integrated module is mounted within the first interior space; the second integrated module is mounted within the second interior space.

Optionally, the controller comprises a first integrated module and a second integrated module; the first integrated module comprises a first control module and first heat dissipation modules arranged at intervals up and down with the first control module; the second integrated module comprises a second control module and a second heat dissipation module which is arranged at an interval from the second control module up and down; the first heat dissipation module and the second heat dissipation module are both positioned on a first plane; the first control module and the second control module are both positioned on a second plane, and the second plane is positioned at one end, far away from the support shell, of the first plane;

the integrated shell is provided with a concave accommodating groove for accommodating the first heat dissipation module and the second heat dissipation module which extend out of the installation groove.

Optionally, the first integrated module further includes a plurality of first protrusions disposed on an end surface of the first heat dissipation module away from the first control module; the second integrated module further comprises a plurality of second protrusions arranged on the end face, far away from the second control module, of the second heat dissipation module.

Optionally, the cooling water channel comprises a water channel inlet, a water channel outlet, and a water channel cavity communicating the water channel inlet and the water channel outlet; the motor body comprises a motor inner shell arranged in the motor outer shell; a cooling space is formed between the motor outer shell and the motor inner shell; a water inlet communicated with the cooling space is formed in the motor outer shell; and one end of the water channel outlet, which is far away from the water channel cavity, is communicated with the water inlet.

Optionally, a plurality of air guide rib plates arranged along the circumferential direction of the motor output shaft are arranged on the outer wall of the motor inner shell.

Optionally, the reducer body comprises a reducer input shaft, a reducer intermediate shaft, a reducer output shaft, a driving gear, an output gear, an intermediate driving gear and an intermediate driven gear; the input shaft of the speed reducer is connected with the output shaft of the motor; the driving gear is mounted on the input shaft of the speed reducer, the middle driving gear and the middle driven gear are both mounted on the middle shaft of the speed reducer, and the output gear is mounted on the output shaft of the speed reducer; the intermediate driving gear is meshed with the driving gear; the intermediate driven gear is meshed with the output gear;

the axis of the intermediate shaft of the speed reducer is higher than the axes of the input shaft of the speed reducer and the output shaft of the speed reducer; on a plane perpendicular to the axis of the input shaft of the speed reducer, an included angle between a connecting line between the central point of the input shaft of the speed reducer and the central point of the output shaft of the speed reducer and a horizontal plane is smaller than or equal to a preset angle.

In the invention, the integrated shell comprises a support shell for supporting the controller, a motor outer shell for mounting the motor body and a speed reducer shell for mounting the speed reducer body; the supporting shell is arranged above the motor outer shell and the speed reducer shell. Thereby the controller can direct mount need not in addition for the controller sets up the lid in the supporting shell, has simplified this structure of integrating the electricity and has driven system, and simple to operate. In addition, the integrated electric drive system is integrated with the motor body, the speed reducer body and the controller, so that connection of all parts through complex wire harnesses is avoided, the integration level, the compactness and the reliability of the integrated electric drive system are improved, and the mode of the integrated electric drive system and the NVH performance of an automobile are improved.

An embodiment of the present invention further provides an electric vehicle, including the above integrated electric drive system.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic assembly structure diagram of an integrated electric drive system according to an embodiment of the present invention;

FIG. 2 is an exploded view of an integrated electric drive system according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a controller of an integrated electric drive system installed in a mounting slot according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an integrated electric drive system with a controller mounted in a mounting slot from another perspective according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first heat sink part, a second heat sink part and an integrated housing of the integrated electric drive system according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an integrated housing of an integrated electric drive system according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of the first heat sink piece and the second heat sink piece of the integrated electric drive system according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a reducer body of an integrated electric drive system according to an embodiment of the present invention, which is mounted in an integrated housing.

The reference numerals in the specification are as follows:

1. a motor body; 11. a motor inner housing; 111. a flow guide rib plate; 2. a reducer body; 21. a reducer input shaft; 22. a reducer intermediate shaft; 23. a reducer output shaft; 24. a driving gear; 25. an output gear; 26. a middle driving gear; 27. an intermediate driven gear; 3. an integrated housing; 31. a support housing; 311. a cooling water channel; 3111. a waterway inlet; 3112. a waterway outlet; 312. a battery mounting space; 313. accommodating grooves; 32. a motor outer housing; 321. a water outlet; 33. a reducer housing; 4. an electrically controlled housing; 41. mounting grooves; 411. a first interior space; 412. a second interior space; 5. a controller; 51. a direct current bus; 52. a first integrated module; 521. a capacitive module; 522. an IGBT module; 523. a first control module; 524. a first heat dissipation module; 5241. a first protrusion; 53. a second integrated module; 531. a second control module; 532. a second heat dissipation module; 5321. a second protrusion; 54. a low voltage connector; 55. a direct current charging wire; 56. an alternating current charging wire; 6. an air conditioning compressor; 7. and (4) a water pump.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the present invention, in order to better show the structure of the integrated electric drive system and the connection relationship thereof, the "upper" is the direction pointing to the vehicle roof (i.e. above the integrated electric drive system shown in fig. 1); the "down" in the sense of the present invention is the direction that is actually pointing towards the bottom of the vehicle (i.e. below the integrated electric drive system shown in fig. 1).

As shown in fig. 1 and fig. 2, an integrated electric drive system according to an embodiment of the present invention includes a motor body 1, a reducer body 2, an integrated housing 3, and a controller 5 connected to the motor body 1; the motor output shaft of the motor body 1 is connected with the reducer input shaft 21 of the reducer body 2; the integrated housing 3 includes a support housing 31 for supporting the controller 5, a motor outer housing 32 for mounting (by screwing or the like) the motor body 1, and a decelerator housing 33 for mounting (by screwing or the like) the decelerator body 2; the support case 31 is disposed above the motor case 32 and the reduction gear case 33. It is understood that the motor body 1 refers to a motor transmission member installed in the motor outer casing 32; such as a motor input shaft, a motor output shaft, a coil, etc. The reducer body 2 refers to reducer transmission members such as a reducer input shaft 21, a reducer output shaft 23, a reducer intermediate shaft 22, various meshing gears, and the like, which are installed in the reducer case 33. The output shaft of the motor may be directly connected to the input shaft 21 of the speed reducer, or may be indirectly connected to the input shaft 21 of the speed reducer through a gear.

In the invention, the integrated shell 3 comprises a supporting shell 31 for supporting the controller 5, a motor outer shell 32 for mounting the motor body 1, and a speed reducer shell 33 for mounting the speed reducer body 2; the support case 31 is disposed above the motor case 32 and the reduction gear case 33. Thereby the controller 5 can be directly installed on the supported shell 31 without additionally arranging a box cover for the controller 5, the structure of the integrated electric drive system is simplified, and the installation is convenient. In addition, the integrated electric drive system is integrated with the motor body 1, the speed reducer body 2 and the controller 5, so that connection of all parts through complex wire harnesses is avoided, the integration level, the compactness and the reliability of the integrated electric drive system are improved, and the mode of the integrated electric drive system and the NVH performance of an automobile are improved.

In an embodiment, as shown in fig. 1 and fig. 2, the integrated electric drive system further includes an electric control housing 4, a mounting groove 41 for mounting the controller 5 is provided on the electric control housing 4, and a notch edge of the mounting groove 41 of the electric control housing 4 is connected to the upper end surface of the support housing 31; a cooling water passage 311 for cooling the controller 5 is provided on the support housing 31. It will be understood that, after the electric control housing 4 is connected to the support housing 31, the edge of the notch of the mounting groove 41 is closed by the upper end surface of the support housing 31 (preferably, the notch is hermetically connected to the support housing), so as to protect the controller 5 (and there is no need to provide a box cover for covering the mounting groove 41 to protect the controller). So, need not to set up in addition the lid of automatically controlled casing 4 has simplified this structure of integrating electrically driving system, and simple to operate. In addition, the cooling water channel 311 for cooling the controller 5 is arranged on the support shell 31, and the cooling water channel 311 is simple in structure and convenient to manufacture, so that the manufacturing cost of the integrated electric drive system is reduced.

In one embodiment, as shown in fig. 2 and 5, the support housing 31 is further provided with a battery mounting space 312 opened toward the mounting groove 41; the integrated electric drive system further includes a battery (not shown) mounted in the battery mounting space 312. It is understood that the battery is a small 12V battery, which is commonly used in low power subsystems of automobiles, such as automobile door opening and closing, automobile starting, automobile lamps, etc.; furthermore, the battery can be a battery pack, an electric core or a battery module; if the battery is battery module or electricity core, need not this moment for the battery sets up the battery package shell to can alleviate this integrative integrated form electric drive system's weight. In addition, the connecting line between the battery and the controller is located in the mounting groove 41, so that the length of the wiring harness between the battery and the controller can be shortened, and the integration level of the integrated electric drive system is further improved.

In one embodiment, as shown in fig. 1 and 2, the integrated electric drive system further comprises an air conditioner compressor 6 and a water pump 7 both mounted on the reducer case 33; the air-conditioning compressor 6 and the water pump 7 are both connected with the controller 5. It will be appreciated that the water pump 7 may be used to provide water to the wipers of a vehicle. Through air condition compressor 6 with the design of water pump 7 has further promoted this integration that integrates electrically driven system, has still reduced this installation space that integrates electrically driven system on the car simultaneously.

In one embodiment, as shown in fig. 3, the controller 5 includes a dc bus 51 mounted on the electronic control housing 4, and a first integrated module 52 and a second integrated module 53 both mounted in the mounting groove 41; the first integrated module 52 is connected with a power battery of the automobile; as can be understood, the first integrated module 52 is also connected to the air conditioner compressor 6, and the first integrated module 52 is integrated with an on-board low-voltage dc converter, an on-board charging controller, a compressor controller, and the like; and the second integrated module 53 is integrated with a motor controller, a vehicle controller, a battery management controller, and the like.

The second integrated module 53 includes a capacitor module 521, an Insulated Gate Bipolar Transistor (IGBT) module 522, and a three-phase copper bar (not shown); the capacitor module 521 is connected with an automobile power battery through the direct current bus 51; the three-phase copper bar is connected with three-phase terminals (not shown) of the motor body 1; the automobile power battery drives the motor body 1 to rotate through the direct-current bus 51, the capacitor module 521, the IGBT module 522 and the three-phase copper bar which are connected in sequence. Specifically, the IGBT module 522 is directly connected to the capacitor module 521 through 6 screws (or other numbers may be set as required), and the three-phase copper bar is mounted in the mounting groove 41 through a three-phase copper bar bracket. And the fuse of the first integrated module 52 and the fuse of the second integrated module 53 are further integrated on the capacitor module 521, so that the safety of the integrated electric drive system is improved.

Preferably, the second integrated module 53 further includes a hall sensor (not shown), and a driving board (not shown) mounted on the IGBT module 522; through holes for the three-phase copper bars to pass through are formed in the Hall sensors, and the Hall sensors are correspondingly connected with the three-phase copper bars; the control panel can detect the current output to the motor body 1 by the automobile power battery through the Hall sensor.

In the invention, the motor body 1 is driven to rotate by the automobile power battery through the direct current bus 51, the capacitor module 521, the IGBT module 522 and the three-phase copper bar which are connected in sequence, so that the technical effect that the automobile power battery drives the automobile wheels to rotate is realized.

In one embodiment, as shown in fig. 3 and 4, the controller 5 includes a first integrated module 52 and a second integrated module 53; the mounting groove 41 comprises a first inner space 411 and a second inner space 412 which are both arranged in a rectangular shape and are adjacent to each other; the first integrated module 52 is installed in the first internal space 411; the second integrated module 53 is installed in the second internal space 412. It is understood that the dc bus bar 51 is located at a side of the second inner space 412 facing away from the first inner space 411. Each part of the controller 5 is orderly arranged in the electric control shell 4, so that the integration level of the integrated electric drive system is improved, the connection of complex wire harnesses among all parts of the controller 5 is reduced, and the mode of the controller 5 is improved.

In one embodiment, as shown in fig. 3, the controller 5 further includes a low voltage connector 54, a contactor (not shown), a dc charging line 55, and an ac charging line 56; the alternating current charging wire 56 and the low-voltage connector 54 are both connected with the first integrated module 52, and the direct current charging wire 55 is connected with the three-phase copper bar through the contactor. It is understood that the number of the low-voltage connectors 54 may be multiple, such as 2, 3, etc., according to design requirements; the low-voltage connector 54 is connected with a temperature sensor, a current sensor and the like of the automobile power battery pack and is used for detecting parameters such as temperature, current and the like of the automobile power battery pack; further, an external direct current charger sequentially passes through the direct current charging wire 55, the contactor and the three-phase copper bar to perform direct current charging on the automobile power battery; the external ac charger charges the vehicle power battery with ac through the ac charging line 56 and the first integrated module 52 in sequence. Through the design of foretell controller 5, promoted this integration electric drive system's suitability and integration.

In one embodiment, as shown in fig. 4 and 5, the controller 5 includes a first integrated module 52 and a second integrated module 53; the first integrated module 52 includes a first control module 523 and a first heat dissipation module 524 spaced up and down from the first control module 523; the second integrated module 53 includes a second control module 531 and a second heat dissipation module 532 spaced from the second control module 531 up and down; the first thermal module 524 and the second thermal module 532 are both located on a first plane; the first control module 523 and the second control module 531 are located on a second plane, which is located at one end of the first plane far away from the support housing 31; it can be understood that the first integrated module 52 and the second integrated module 53 are both of a top-bottom double-layer structure, the first control module 523 is integrated with a first control element of the first integrated module 52 (that is, an element generating less heat in the first integrated module 52), and the first heat dissipation module 524 is integrated with a first heat generating component and a first heat dissipation component of the first integrated module 52 (the first heat generating component is an element generating more heat in the first integrated module 52, and the first heat dissipation component is a device such as a direct cooling plate and the like that assists the first heat generating component in dissipating heat); the second control module 531 integrates the second control element of the second integrated module 53 (i.e., the element generating less heat in the second integrated module 53), and the second heat dissipation module 532 integrates the second heat generating component of the second integrated module 53 and the second heat dissipation component (the second heat generating component is the element generating more heat in the second integrated module 53, and the second heat dissipation component is a component assisting the heat dissipation of the second heat generating component, such as a direct cooling plate).

A receiving groove 313 for receiving the first thermal module 524 and the second thermal module 532 protruding from the mounting groove 41 is concavely formed on the supporting housing 31; the accommodating groove 313 is disposed opposite to the cooling water passage 311. It is understood that the first thermal module 524 and the second thermal module 532 are inserted into the receiving groove 313, so that the coolant in the coolant channel 311 can sufficiently absorb the heat dissipated by the first thermal module 524 and the second thermal module 532. In the invention, through the design of the first integrated module 52 and the second integrated module 53 on the upper layer and the lower layer (the first heat dissipation module 524 and the second heat dissipation module 532 are directly inserted into the accommodating groove 313, and the cooling water channel 331 is located below the accommodating groove, so that heat emitted by the first heat dissipation module 524 and the second heat dissipation module 532 can be fully absorbed, the heat dissipation efficiency of the controller 5 is improved, and the service life of the integrated electric drive system is prolonged.

In one embodiment, as shown in fig. 7, the first integrated module 52 further includes a plurality of first protrusions 5241 disposed on an end surface of the first heat dissipation module 524 away from the first control module 523; the second integrated module 53 further includes a plurality of second protrusions 5321 disposed on an end surface of the second heat dissipation module 532 away from the second control module 53. It can be understood that the design of the first protrusion 5241 increases the contact area between the first heat sink module 524 and the cooling water channel 311, and the design of the second protrusion 5321 increases the contact area between the second heat sink module 532 and the cooling water channel 311, so as to further improve the heat dissipation efficiency of the control and prolong the service life of the integrated electric drive system.

In one embodiment, as shown in fig. 6, the cooling water channel 311 includes a channel inlet 3111, a channel outlet 3112, and a channel cavity (not shown) communicating the channel inlet 3111 and the channel outlet 3112; the motor body 1 comprises a motor inner shell 11 arranged in the motor outer shell 32; a cooling space (not shown) is formed between the motor outer housing 32 and the motor inner housing 11; a water inlet (not shown) communicated with the cooling space is formed in the motor outer shell 32; the water channel outlet 3112 is connected to the water inlet at an end remote from the water channel cavity. Further, a water outlet 321 which is communicated with the cooling space and the external space is also arranged on the motor outer shell 32; the cooling liquid in the cooling space can flow out from the water outlet 321. As will be appreciated, the water passage cavity is provided in the support housing 31, and the cooling cavity is structurally easy to manufacture, thereby reducing the manufacturing cost of the integrated electric drive system.

Specifically, after flowing into the water channel cavity from the water channel inlet 3111 and absorbing heat emitted from the first integrated module 52 and the second integrated module 53, the coolant flows into the cooling space through the water channel outlet 3112 and the water inlet, and after absorbing heat emitted from the motor body 1 in the cooling space, the coolant flows out from the water outlet 321. In the invention, the cooling liquid can cool the first integrated module 52, the second integrated module 53 and the motor body 1, so that the utilization rate of the cooling liquid is improved.

In one embodiment, as shown in fig. 2, a plurality of air guide ribs 111 arranged along the circumferential direction of the motor output shaft of the motor are provided on the outer wall of the motor inner housing 11. It can be understood that the guide ribs 111 may enable the cooling liquid in the cooling space to flow along the circumferential direction of the inner housing, thereby improving the cooling efficiency of the motor.

In one embodiment, as shown in fig. 8, the reducer body 2 includes a reducer input shaft 21, a reducer intermediate shaft 22, a reducer output shaft 23, a driving gear 24, an output gear 25, an intermediate driving gear 26, a driving gear 24, and an intermediate driven gear 27; the reducer input shaft 21 is connected with the motor output shaft, the driving gear 24 is mounted on the reducer input shaft 21, the intermediate driving gear 26 and the intermediate driven gear 27 are both mounted on the reducer intermediate shaft 22, and the output gear 25 is mounted on the reducer output shaft 23; the intermediate drive gear 26 is meshed with the drive gear 24; the intermediate driven gear 27 is meshed with the output gear 25; as can be understood, the motor output shaft of the motor body 1 passes through the reducer input shaft 21, the driving gear 24, the intermediate driving gear 26, the reducer intermediate shaft 22, the intermediate driven gear 27, the output gear 25, and the reducer output shaft 23 in sequence, and then drives the wheels of the automobile to rotate.

The axis of the reducer intermediate shaft 22 is higher than the axes of the reducer input shaft 21 and the reducer output shaft 23; on a plane perpendicular to the axis of the input shaft 21 of the speed reducer, an included angle between a horizontal plane and a connecting line between the central point of the input shaft 21 of the speed reducer and the central point of the output shaft 23 of the speed reducer is smaller than or equal to a preset angle. The preset angle can be set according to design requirements, for example, the value range of the preset angle is-10 to 10 degrees; preferably, an included angle between a connecting line between a central point of the reducer input shaft 21 and a central point of the reducer output shaft 23 and a horizontal plane is equal to 0 degree. It will be appreciated that the reducer intermediate shaft 22 is located above the reducer input shaft 21 and the reducer output shaft 23, and the intermediate drive gear 26 and the intermediate driven gear 27 are both above the drive gear 24 and the output gear 25; through the design of reduction gear body 2, can reduce the focus of this integrative integrated form electric drive system and the focus of vehicle to promote the stability that the car went, increased the auttombilism enjoyment.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated electric drive system is characterized by comprising a motor body, a speed reducer body, an integrated shell and a controller connected with the motor body; the motor output shaft of the motor body is connected with the speed reducer input shaft of the speed reducer body; the integrated shell comprises a support shell for supporting the controller, a motor outer shell for mounting the motor body, and a speed reducer shell for mounting the speed reducer body; the supporting shell is arranged above the motor outer shell and the speed reducer shell.

2. The integrated electric drive system of claim 1, further comprising an electric control housing, wherein a mounting groove for mounting the controller is formed on the electric control housing, and a notch edge of the mounting groove of the electric control housing is connected to the upper end surface of the support housing; and a cooling water channel for cooling the controller is arranged on the supporting shell.

3. The integrated electric drive system of claim 2 wherein said support housing further defines a battery mounting space opening into said mounting slot; the integrated electric drive system further includes a battery mounted in the battery mounting space.

4. The integrated electric drive system of claim 2, wherein the cooling waterway comprises a waterway inlet, a waterway outlet, and a waterway cavity communicating the waterway inlet and the waterway outlet; the motor body comprises a motor inner shell arranged in the motor outer shell; a cooling space is formed between the motor outer shell and the motor inner shell; a water inlet communicated with the cooling space is formed in the motor outer shell; and one end of the water channel outlet, which is far away from the water channel cavity, is communicated with the water inlet.

5. The integrated electric drive system of claim 4, wherein the outer wall of the inner housing of the motor is provided with a plurality of air guide ribs arranged along the circumference of the motor output shaft.

6. The integrated electric drive system of claim 1 further comprising an air conditioning compressor and a water pump both mounted on the reducer housing; the air conditioner compressor and the water pump are both connected with the controller.

7. The integrated electric drive system of claim 2, wherein the controller comprises a dc bus mounted on the electronic control housing and first and second integrated modules each mounted within the mounting slot; the first integrated module is connected with an automobile power battery;

8. The integrated electric drive system of claim 7, wherein the controller further comprises a low voltage connector, a contactor, a dc charging line, and an ac charging line; the alternating current charging wire with the low voltage connector is all connected first collection moulding piece, the direct current charging wire passes through the contactor is connected the three-phase copper bar.

9. The integrated electric drive system of claim 1, wherein the controller comprises a first integrated module and a second integrated module; the mounting groove comprises a first inner space and a second inner space which are both arranged in a rectangular shape and are adjacent to each other; the first integrated module is mounted within the first interior space; the second integrated module is mounted within the second interior space.

10. The integrated electric drive system of claim 1, wherein the controller comprises a first integrated module and a second integrated module; the first integrated module comprises a first control module and first heat dissipation modules arranged at intervals up and down with the first control module; the second integrated module comprises a second control module and a second heat dissipation module which is arranged at an interval from the second control module up and down; the first heat dissipation module and the second heat dissipation module are both positioned on a first plane; the first control module and the second control module are both positioned on a second plane, and the second plane is positioned at one end, far away from the support shell, of the first plane;

the support casing is sunken to be formed with and is used for holding from the mounting groove stretches out first heat dissipation module and the holding tank of second heat dissipation module.

11. The integrated electric drive system of claim 10, wherein the first integrated module further comprises a plurality of first protrusions disposed on an end surface of the first heat dissipation module distal from the first control module; the second integrated module further comprises a plurality of second protrusions arranged on the end face, far away from the second control module, of the second heat dissipation module.

12. The integrated electric drive system of claim 1, wherein the reducer body comprises a reducer input shaft, a reducer intermediate shaft, a reducer output shaft, a drive gear, an output gear, an intermediate drive gear, and an intermediate driven gear; the input shaft of the speed reducer is connected with the output shaft of the motor, the driving gear is arranged on the input shaft of the speed reducer, the middle driving gear and the middle driven gear are both arranged on the middle shaft of the speed reducer, and the output gear is arranged on the output shaft of the speed reducer; the intermediate driving gear is meshed with the driving gear; the intermediate driven gear is meshed with the output gear;

13. An electric vehicle comprising an integrated electric drive system as claimed in any one of claims 1 to 12.