Motor shell, motor electric control assembly, electric drive system and vehicle

Abstract

The invention relates to a motor shell, a motor electric control assembly, an electric drive system and a vehicle. The motor shell comprises a shell body and a heat dissipation part. Wherein the shell body is used for installing a motor, a liquid cooling cavity, a first liquid passing opening and a second liquid passing opening are formed in the shell body, the first liquid passing opening and the second liquid passing opening are both communicated with the liquid cooling cavity, and the liquid cooling cavity is used for allowing cooling liquid to flow through. The heat dissipation part is connected with the shell body and arranged in the liquid cooling cavity so as to change the flowing direction of the cooling liquid. The invention aims to prolong the flowing path of the cooling liquid, so that the motor shell can fully dissipate heat of the motor.

Description

Technical Field

[0001] This application relates to the technical field of motor housings, and particularly to a motor housing, a motor electronic control assembly, an electric drive system, and a vehicle. Background Art

[0002] In the related art, a motor housing is used for installing a motor. The motor housing is provided with a liquid cooling cavity, and a coolant is arranged in the liquid cooling cavity. The coolant dissipates heat from the motor through the motor housing.

[0003] However, in the related art, due to the too short flow path of the coolant, the motor housing does not dissipate heat from the motor sufficiently. Summary of the Invention

[0004] Embodiments of this application provide a motor housing, a motor electronic control assembly, an electric drive system, and a vehicle, aiming to extend the flow path of the coolant so that the motor housing can dissipate heat from the motor more sufficiently.

[0005] To achieve the above object, according to the first aspect of this application, a motor housing is provided, including: A housing main body for installing a motor. A liquid cooling cavity, a first liquid passing port, and a second liquid passing port are arranged in the housing main body. The first liquid passing port and the second liquid passing port are both communicated with the liquid cooling cavity, and the liquid cooling cavity is used for the coolant to flow through; and A heat dissipation part connected to the housing main body and arranged in the liquid cooling cavity to change the flow direction of the coolant.

[0006] Optionally, the heat dissipation part and the housing main body define a first liquid cooling flow path. One end of the first liquid cooling flow path is communicated with the first liquid passing port, the other end of the first liquid cooling flow path is communicated with the second liquid passing port, and the first liquid cooling flow path is bent.

[0007] Optionally, the first liquid cooling flow path includes a first flow segment and a second flow segment. The first flow segment extends along the circumferential direction of the housing main body, and the second flow segment extends along the axial direction of the housing main body.

[0008] Optionally, the housing main body is annular for surrounding the motor. In the axial direction of the housing main body, the cavity wall of the liquid cooling cavity includes a first cavity wall and a second cavity wall arranged opposite to each other. The heat dissipation part includes a first flow guiding part and a second flow guiding part. The first flow guiding part is connected to the first cavity wall and is spaced from the second cavity wall. The second flow guiding part is connected to the second cavity wall and is spaced from the first cavity wall. In the circumferential direction of the housing main body, the first flow guiding part and the second flow guiding part are spaced from each other.

[0009] Optionally, in the circumferential direction of the housing main body, the first flow guiding part and the second flow guiding part are opposite to each other.

[0010] Optionally, the heat dissipation part further includes a third flow guiding part disposed between the first cavity wall and the second cavity wall. One end of the first flow guiding part close to the second cavity wall is connected to the third flow guiding part. In the circumferential direction of the housing main body, the third flow guiding part at least extends beyond one side of the first flow guiding part.

[0011] Optionally, the heat dissipation part further includes a fourth flow guiding part disposed between the first cavity wall and the second cavity wall. One end of the second flow guiding part close to the first cavity wall is connected to the fourth flow guiding part. In the circumferential direction of the housing main body, the fourth flow guiding part at least extends beyond one side of the second flow guiding part.

[0012] Optionally, in the axial direction of the housing main body, the third flow guiding part is at least oppositely arranged with one of the fourth flow guiding parts.

[0013] Optionally, the first liquid passing port is configured as a first liquid inlet hole. In the depth direction of the first liquid passing port, the heat dissipation part is arranged in a dislocation manner with respect to the first liquid passing port.

[0014] According to a second aspect of the present application, there is provided an electric motor and electric control assembly, including the aforementioned motor housing.

[0015] Optionally, the electric motor and electric control assembly includes a first motor end cover. In the axial direction of the housing main body, the first motor end cover covers one end of the housing main body. The first motor end cover is provided with a second liquid cooling flow channel for the coolant to flow through, and the second liquid cooling flow channel is communicated with the first liquid passing port.

[0016] Optionally, the first motor end cover is in contact with the housing main body to conduct the second liquid cooling flow channel and the first liquid passing port.

[0017] Optionally, in the axial direction of the housing main body, the housing main body and the first motor end cover are inserted into each other.

[0018] Optionally, the second liquid cooling flow channel extends along the axial direction of the housing main body.

[0019] Optionally, the electric motor and electric control assembly further includes an electric control heat dissipation part. The electric control heat dissipation part is provided with a third liquid cooling flow channel for the coolant to flow through, and the third liquid cooling flow channel is communicated with the second liquid cooling flow channel.

[0020] Optionally, the first motor end cover is in contact with the electric control heat dissipation part to conduct the second liquid cooling flow channel and the third liquid cooling flow channel.

[0021] Optionally, the first motor end cover is provided with a fourth liquid cooling channel, and the fourth liquid cooling channel is communicated with the second liquid cooling channel through the third liquid cooling channel.

[0022] Optionally, the first motor end cover is in contact with the electric control heat dissipation component to communicate the third liquid cooling channel and the fourth liquid cooling channel.

[0023] According to the third aspect of the present application, an electric drive system is further provided, including the aforementioned motor electric control assembly.

[0024] According to the fourth aspect of the present application, a vehicle is further provided, including the aforementioned electric drive system.

[0025] In the motor housing of the embodiment of the present application, the heat dissipation part forces the coolant to bypass or turn, which makes the flow trajectory of the coolant relatively tortuous, thereby prolonging the flow path of the coolant, and further enabling the motor housing to dissipate heat from the motor more sufficiently.

[0026] Other features and advantages of the present application will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts.

[0027] In order to more completely understand the present application and its beneficial effects, the following description will be made in conjunction with the drawings, where the same reference numerals represent the same parts in the following description.

[0028] Figure 1 is an exploded view of a partial structure of the motor electric control assembly provided in an exemplary embodiment of the present disclosure; Figure 2 is Figure 1 a schematic structural diagram of the motor housing in Figure 3 is Figure 1 a schematic structural diagram of the motor housing in Figure 4 is Figure 1 a schematic structural diagram of the motor housing in Figure 5 is Figure 1 a schematic structural diagram of the first motor end cover in Figure 6 is Figure 1 a schematic structural diagram of the first motor end cover in Figure 7 isFigure 1 Structural schematic diagram of the electric control heat dissipation component Figure 8 is Figure 1 Flow channel schematic diagram after the assembly of the motor electric control assembly Figure 9 It is a flow path diagram of the coolant flowing in the motor housing without the third diversion part and the fourth diversion part but with the first diversion part and the second diversion part Figure 10 It is a flow path diagram of the coolant flowing in the motor housing with the first diversion part, the second diversion part, the third diversion part and the fourth diversion part

[0029] Explanation of reference numerals 100. Motor electric control assembly; 200. Motor housing; 300. Housing main body; 310. Inner housing part; 320. Outer housing part; 330. First cavity wall; 340. Second cavity wall; 350. Liquid cooling cavity; 360. First liquid cooling flow path; 361. First flow segment; 362. Second flow segment; 363. First liquid passing port; 364. Second liquid passing port; 370. Heat dissipation part; 371. First diversion part; 372. Second diversion part; 373. Third diversion part; 374. Fourth diversion part; 380. Insertion convex part; 400. First motor end cover; 410. Second liquid cooling flow path; 412. Third liquid inlet hole; 413. Fourth liquid inlet hole; 420. Fourth liquid cooling flow path; 421. Seventh liquid inlet hole; 422. Eighth liquid inlet hole; 430. Positioning jack; 500. Electric control heat dissipation component; 510. Third liquid cooling flow path; 511. Fifth liquid inlet hole; 512. Sixth liquid inlet hole; 600. Second motor end cover; 700. Electric control power module; 810. First sealing ring; 820. Second sealing ring; 830. Third sealing ring; 840. Liquid inlet pipe; 850. Liquid outlet pipe; 910. Flow path; 920. Eddy current path Specific embodiments

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, 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 efforts belong to the protection scope of the present application

[0031] According to the first aspect of the present application, with reference to Figures 1 to 4, the present disclosure provides a motor housing 200. The motor housing 200 includes a housing main body 300 and a heat dissipation portion 370. Among them, the housing main body 300 is used for installing the motor. A liquid cooling cavity 350, a first liquid passing port 363 and a second liquid passing port 364 are provided in the housing main body 300. Both the first liquid passing port 363 and the second liquid passing port 364 are communicated with the liquid cooling cavity 350, and the liquid cooling cavity 350 is used for the coolant to flow through. The heat dissipation portion 370 is connected to the housing main body 300 and is arranged in the liquid cooling cavity 350 to change the flow direction of the coolant.

[0032] In this way, the heat dissipation portion 370 forces the coolant to detour or turn, which makes the flow path of the coolant relatively tortuous, thereby extending the flow path of the coolant, and further enabling the motor housing 200 to dissipate heat from the motor more sufficiently.

[0033] Referring together Figure 8 , in some embodiments, the heat dissipation portion 370 and the housing main body 300 define a first liquid cooling flow path 360. One end of the first liquid cooling flow path 360 is communicated with the first liquid passing port 363, and the other end of the first liquid cooling flow path 360 is communicated with the second liquid passing port 364. The first liquid cooling flow path 360 is bent.

[0034] The bent first liquid cooling flow path 360 makes the flow process of the coolant longer when flowing through the liquid cooling cavity 350. Compared with a straight flow path, the coolant needs to pass through more paths in the bent first liquid cooling flow path 360 to flow from the first liquid passing port 363 to the second liquid passing port 364. When the coolant flows through a longer path, it has more time to contact the heat dissipation portion 370 and the housing main body 300, thereby increasing the heat exchange time and improving the heat exchange efficiency. In addition, both ends of the first liquid cooling flow path 360 are respectively connected to the first liquid passing port 363 and the second liquid passing port 364, which enables the coolant to flow relatively concentratedly in the liquid cooling cavity 350.

[0035] There are many structural forms of the first liquid cooling flow path 360. In some embodiments, the first liquid cooling flow path 360 includes a first flow segment 361 and a second flow segment 362. The first flow segment 361 extends along the circumferential direction of the housing main body 300, and the second flow segment 362 extends along the axial direction of the housing main body 300. However, the present design is not limited thereto. In some other embodiments, the first liquid cooling flow path 360 includes a plurality of arc-shaped flow segments.

[0036] In some embodiments, the housing body 300 is annular for surrounding the motor. In the axial direction of the housing body 300, the cavity wall of the liquid cooling cavity 350 includes a first cavity wall 330 and a second cavity wall 340 which are oppositely arranged. The heat dissipation part 370 includes a first diversion part 371 and a second diversion part 372. The first diversion part 371 is connected to the first cavity wall 330 and is spaced apart from the second cavity wall 340. The second diversion part 372 is connected to the second cavity wall 340 and is spaced apart from the first cavity wall 330. In the circumferential direction of the housing body 300, the first diversion part 371 and the second diversion part 372 are spaced apart. Both the first diversion part 371 and the second diversion part 372 are used to guide the coolant to flow along the axial direction of the housing body 300.

[0037] In this way, it is beneficial to extend the flow path of the coolant in the first liquid cooling channel 360, so that the coolant has more time to contact the heat dissipation part 370 and the housing body 300, thereby increasing the heat exchange time and improving the heat exchange efficiency.

[0038] It is worth mentioning that the circumferential direction of the housing body 300 is as shown by the direction A in Figure 3 and the axial direction of the housing body 300 is as shown by the direction B in Figure 4 .

[0039] In some embodiments, in the circumferential direction of the housing body 300, the first diversion part 371 and the second diversion part 372 are oppositely arranged.

[0040] In this way, it is beneficial to make the flow path of the coolant longer when flowing through the liquid cooling cavity 350. When the coolant flows through a longer path, it has more time to contact the heat dissipation part 370 and the housing body 300, thereby increasing the heat exchange time and improving the heat exchange efficiency. It can be understood that in the circumferential direction of the housing body 300, the projection of the first diversion part 371 intersects with the projection of the second diversion part 372.

[0041] In some embodiments, the heat dissipation part 370 further includes a third diversion part 373 disposed between the first cavity wall 330 and the second cavity wall 340. The third diversion part 373 is used to guide the coolant to flow along the circumferential direction of the housing body 300. One end of the first diversion part 371 close to the second cavity wall 340 is connected to the third diversion part 373. In the circumferential direction of the housing body 300, the third diversion part 373 at least extends beyond one side of the first diversion part 371.

[0042] In this way, it is beneficial to make the flow path of the coolant longer when flowing through the liquid cooling cavity 350. When the coolant flows through a longer path, it has more time to contact the heat dissipation part 370 and the housing body 300, thereby increasing the heat exchange time and improving the heat exchange efficiency.

[0043] In one example, a plurality of third flow guiding portions 373 are provided. In the circumferential direction of the housing main body 300, a part of the third flow guiding portions 373 extends beyond one side of the first flow guiding portion 371, and another part of the third flow guiding portions 373 extends beyond both sides of the first flow guiding portion 371.

[0044] In some embodiments, the heat dissipation portion 370 further includes a fourth flow guiding portion 374 disposed between the first cavity wall 330 and the second cavity wall 340. The fourth flow guiding portion 374 is used to guide the coolant to flow along the circumferential direction of the housing main body 300. One end of the second flow guiding portion 372 close to the first cavity wall 330 is connected to the fourth flow guiding portion 374. In the circumferential direction of the housing main body 300, the fourth flow guiding portion 374 extends at least beyond one side of the second flow guiding portion 372.

[0045] In this way, it is beneficial to make the flow path of the coolant longer when flowing through the liquid cooling cavity 350. When the coolant flows through a longer path, it has more time to contact the heat dissipation portion 370 and the housing main body 300, thereby increasing the heat exchange time and improving the heat exchange efficiency.

[0046] In one example, a plurality of fourth flow guiding portions 374 are provided. In the circumferential direction of the housing main body 300, a part of the fourth flow guiding portions 374 extends beyond one side of the second flow guiding portion 372, and another part of the fourth flow guiding portions 374 extends beyond both sides of the second flow guiding portion 372.

[0047] In some embodiments, in the axial direction of the housing main body 300, the third flow guiding portion 373 is at least disposed opposite to one fourth flow guiding portion 374. It can be understood that in the axial direction of the housing main body 300, the projection of the third flow guiding portion 373 at least intersects with the projection of one fourth flow guiding portion 374.

[0048] In this way, it is beneficial to suppress the formation of eddy currents in the liquid cooling cavity 350, that is, to reduce the occurrence of the situation where part of the coolant keeps circulating in the liquid cooling cavity 350, which is beneficial to improving the heat dissipation efficiency of the motor housing 200 for the motor.

[0049] As Figure 9 and Figure 10 shown, Figure 9 FIG. 910 is a flow path diagram of the coolant flowing in the motor housing 200 without the third flow guiding portion 373 and the fourth flow guiding portion 374 but with the first flow guiding portion 371 and the second flow guiding portion 372. Figure 10 FIG. 910 is a flow path diagram of the coolant flowing in the motor housing 200 provided with the first flow guiding portion 371, the second flow guiding portion 372, the third flow guiding portion 373 and the fourth flow guiding portion 374. It can be seen that Figure 10There are almost no eddy current trajectories 920 in the flow trajectory 910. It can be understood that in the axial direction of the housing body 300, the third flow guiding portion 373 is at least oppositely arranged with a fourth flow guiding portion 374, which is beneficial to suppressing the formation of eddy currents of the coolant in the liquid cooling cavity 350, that is, reducing the occurrence of the situation where part of the coolant circulates in the liquid cooling cavity 350 all the time, and is beneficial to improving the heat dissipation efficiency of the motor housing 200 for the motor.

[0050] In some embodiments, the first liquid passing port 363 is configured as a first liquid inlet hole, and in the depth direction of the first liquid passing port 363, the heat dissipation portion 370 is arranged in a staggered manner with the first liquid passing port 363.

[0051] In this way, after the coolant enters from the first liquid passing port 363, it will not be blocked by the heat dissipation portion 370 in the depth direction of the first liquid passing port 363, which is beneficial to maintaining a relatively high flow rate of the coolant. In this way, a driving member for driving the coolant to flow with a relatively small power can be adopted.

[0052] In an example, the depth direction of the first through hole is consistent with the axial direction of the housing body 300.

[0053] In one example, the housing body 300 includes an inner housing portion 310, an outer housing portion 320, a first cavity wall 330, and a second cavity wall 340. The inner housing portion 310, the outer housing portion 320, the first cavity wall 330, and the second cavity wall 340 jointly enclose a liquid cooling cavity 350. Both the inner housing portion 310 and the outer housing portion 320 are annular. The inner housing portion 310 is used to surround the motor, and the outer housing portion 320 is used to surround the inner housing portion 310. The first diversion portion 371, the second diversion portion 372, the third diversion portion 373, and the fourth diversion portion 374 are all disposed in the liquid cooling cavity 350. The first diversion portion 371 connects the first cavity wall 330, the inner housing portion 310, and the outer housing portion 320. The second diversion portion 372 connects the second cavity wall 340, the inner housing portion 310, and the outer housing portion 320. The third diversion portion 373 connects the first diversion portion 371, the inner housing portion 310, and the outer housing portion 320. The fourth diversion portion 374 connects the second diversion portion 372, the inner housing portion 310, and the outer housing portion 320. The first diversion portion 371 and the second diversion portion 372 extend along the axial direction of the housing body 300, and the third diversion portion 373 and the fourth diversion portion 374 extend along the circumferential direction of the housing body 300. There are multiple first diversion portions 371, second diversion portions 372, third diversion portions 373, and fourth diversion portions 374. One third diversion portion 373 is arranged corresponding to one first diversion portion 371, and one fourth diversion portion 374 is arranged corresponding to one second diversion portion 372. In the circumferential direction of the housing body 300, the first diversion portion 371 and the second diversion portion 372 are alternately arranged, and in the circumferential direction of the housing body 300, the first diversion portion 371 and the second diversion portion 372 are oppositely arranged. It can be understood that in the circumferential direction of the housing body 300, at least part of the projection of the first diversion portion 371 intersects with the projection of the second diversion portion 372. In the axial direction of the housing body 300, the third diversion portion 373 is at least oppositely arranged with one fourth diversion portion 374. It can be understood that in the axial direction of the housing body 300, at least part of the projection of the third diversion portion 373 intersects with the projection of at least one fourth diversion portion 374. The first liquid passing port 363 is opened on the first cavity wall 330, and the second liquid passing port 364 is opened on the outer housing portion 320. The first liquid passing port 363 is configured as a first liquid inlet hole, and the second liquid passing port 364 is configured as a first liquid outlet hole.

[0054] A rounded corner is provided at the connection between the first diversion portion 371 and the first cavity wall 330, and a chamfered corner is provided at the connection between the second diversion portion 372 and the second cavity wall 340. Thus, it is beneficial to reduce the flow resistance of the coolant flowing in the first liquid cooling channel 360.

[0055] A chamfered corner is provided at the connection between the third diversion portion 373 and the first diversion portion 371. Thus, it is beneficial to reduce the flow resistance of the coolant flowing in the first liquid cooling channel 360.

[0056] A chamfered corner is provided at the connection between the fourth diversion portion 374 and the second diversion portion 372. Thus, it is beneficial to reduce the flow resistance of the coolant flowing in the first liquid cooling channel 360.

[0057] In the circumferential direction of the housing body 300, rounded corners are provided at opposite ends of the third flow guiding portion 373. Thus, it is beneficial to reduce the flow resistance of the coolant flowing in the first liquid cooling flow path 360.

[0058] In the circumferential direction of the housing body 300, rounded corners are provided at opposite ends of the fourth flow guiding portion 374. Thus, it is beneficial to reduce the flow resistance of the coolant flowing in the first liquid cooling flow path 360.

[0059] In the axial direction of the housing body 300, the distance range between the third flow guiding portion 373 and the fourth flow guiding portion 374 is from 50 mm to 60 mm. In the axial direction of the housing body 300, the distance between the third flow guiding portion 373 and the fourth flow guiding portion 374 may be, but is not limited to, 50 mm, 51 mm, 52 mm, 53 mm, 54 mm, 55 mm, 56 mm, 57 mm, 58 mm, 59 mm or 60 mm. In the axial direction of the housing body 300, the distance range between the third flow guiding portion 373 and the second cavity wall 340 is from 30 mm to 40 mm. In the axial direction of the housing body 300, the distance between the third flow guiding portion 373 and the second cavity wall 340 may be, but is not limited to, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm or 40 mm. In the axial direction of the housing body 300, the distance range between the fourth flow guiding portion 374 and the first cavity wall 330 is from 30 mm to 40 mm. In the axial direction of the housing body 300, the distance between the fourth flow guiding portion 374 and the first cavity wall 330 may be, but is not limited to, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm or 40 mm. In the circumferential direction of the housing body 300, the distance range between the first flow guiding portion 371 and the second flow guiding portion 372 is from 60 mm to 70 mm. In the circumferential direction of the housing body 300, the distance between the first flow guiding portion 371 and the second flow guiding portion 372 may be, but is not limited to, 60 mm, 61 mm, 62 mm, 63 mm, 64 mm, 65 mm, 66 mm, 67 mm, 68 mm, 69 mm or 70 mm. In the circumferential direction of the housing body 300, the distance range between the third flow guiding portion 373 and the second flow guiding portion 372 is from 20 mm to 30 mm. In the circumferential direction of the housing body 300, the distance between the third flow guiding portion 373 and the second flow guiding portion 372 may be, but is not limited to, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm. In the circumferential direction of the housing body 300, the distance range between the fourth flow guiding portion 374 and the first flow guiding portion 371 is from 20 mm to 30 mm. In the circumferential direction of the housing body 300, the distance between the fourth flow guiding portion 374 and the first flow guiding portion 371 may be, but is not limited to, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm or 30 mm.

[0060]

[0061] This table shows the motor temperatures and the flow resistances of the first liquid cooling channel 360 for different motor housing 200 structures.

[0062] It can be understood that the stator core and windings in the table are the stator and windings of the motor. It can be seen that compared with Scheme 1, the maximum temperature of the stator core in Scheme 2 dropped by 0.6°C, the maximum temperature of the winding dropped by 0.7°C, the average temperature of the stator core dropped by 0.6°C, and the average temperature of the winding dropped by 0.8°C. It is also worth mentioning that the maximum temperature of the coolant located in the motor housing 200 in Scheme 1 is 67.6°C, while the maximum temperature of the coolant located in the motor housing 200 in Scheme 2 is 68.1°C. It can be understood that the coolant located in the motor housing 200 in Scheme 2 carries away more heat. In addition, although the flow resistance of Scheme 2 is increased by 1.1 kPa compared to Scheme 1, the flow state of the coolant in Scheme 2 has been significantly improved, and Scheme 2 can better suppress eddy currents than Scheme 1.

[0063] According to a second aspect of the present disclosure, a motor electronic control assembly 100 is provided. The motor electronic control assembly 100 includes the above-mentioned motor housing 200. The motor electronic control assembly 100 has all the beneficial effects of the above-mentioned motor housing 200, which will not be repeated in this disclosure.

[0064] Reference Figure 5 and Figure 6 In some embodiments, the motor electronic control assembly 100 includes a first motor end cover 400. In the axial direction of the shell body 300, the first motor end cover 400 covers one end of the shell body 300. The first motor end cover 400 is provided with a second liquid cooling channel 410 for cooling liquid to flow through.

[0065] In this way, the coolant can dissipate heat from the motor through the first motor end cover 400. In one example, the first motor end cover 400 is configured as a rear end cover of the motor.

[0066] In addition, the second liquid-cooling channel 410 is in communication with the first liquid transfer port 363 .

[0067] In this way, the first liquid cooling channel 360 for dissipating heat from the motor and the second liquid cooling channel 410 for dissipating heat from the motor controller are connected, thereby improving the flow smoothness of the coolant and reducing the flow resistance.

[0068] In some embodiments, the motor and electronic control assembly 100 further includes a second motor end cover 600, which covers the other end of the housing body 300 in the axial direction of the housing body 300. In one example, the second motor end cover 600 is configured as a motor front end cover.

[0069] In some embodiments, the first motor end cover 400 is in contact with the shell body 300 to connect the second liquid cooling channel 410 and the first liquid port 363 .

[0070] In this way, it is beneficial to save the adapter pipe connecting the first liquid cooling channel 360 and the second liquid cooling channel 410. On the one hand, the cost of manufacturing the motor and electric control assembly 100 is reduced. On the other hand, it is beneficial to improve the integration degree of the motor and electric control assembly 100, making the structure of the motor and electric control assembly 100 more concise.

[0071] In some embodiments, in the axial direction of the housing main body 300, the housing main body 300 and the first motor end cover 400 are inserted and connected.

[0072] In this way, it is beneficial to improve the assembly accuracy of the housing main body 300 and the first motor end cover 400, and thus beneficial to improve the sealing performance between the second liquid cooling channel 410 and the first liquid passing port 363.

[0073] In one example, the first motor end cover 400 is provided with a positioning jack 430, and the housing main body 300 is provided with an insertion convex part 380, and the insertion convex part 380 is inserted into the positioning jack 430.

[0074] In some embodiments, the second liquid cooling channel 410 extends along the axial direction of the housing main body 300. In this way, during the process of the coolant flowing in the second liquid cooling channel 410, the flow direction of the coolant can be kept consistent, making the flow resistance of the coolant flowing in the second liquid cooling channel 410 smaller.

[0075] Refer to Figure 7 , in some embodiments, the motor and electric control assembly 100 further includes an electric control heat dissipation part 500. The electric control heat dissipation part 500 is provided with a third liquid cooling channel 510 for the coolant to flow through.

[0076] In this way, the coolant can dissipate heat from the motor controller through the electric control heat dissipation part 500.

[0077] In addition, the third liquid cooling channel 510 is communicated with the second liquid cooling channel 410.

[0078] In this way, it is beneficial to make the temperatures of the first motor end cover 400 and the electric control heat dissipation part 500 more uniform, and thus make the temperatures of the motor controller and the motor more uniform.

[0079] In some embodiments, the first motor end cover 400 is in contact with the electric control heat dissipation part 500 to conduct the second liquid cooling channel 410 and the third liquid cooling channel 510.

[0080] In this way, it is beneficial to save the adapter pipe connecting the second liquid cooling channel 410 and the third liquid cooling channel 510. On the one hand, the cost of manufacturing the motor and electric control assembly 100 is reduced. On the other hand, it is beneficial to improve the integration degree of the motor and electric control assembly 100, making the structure of the motor and electric control assembly 100 more concise.

[0081] In some embodiments, the first motor end cover 400 is provided with a fourth liquid cooling channel 420, and the fourth liquid cooling channel 420 is communicated with the second liquid cooling channel 410 through the third liquid cooling channel 510. In this way, the electronic control heat dissipation component 500 realizes the inflow and outflow of the coolant through the first motor end cover 400.

[0082] In some embodiments, the first motor end cover 400 is in contact with the electronic control heat dissipation component 500 to communicate the third liquid cooling channel 510 and the fourth liquid cooling channel 420.

[0083] In this way, it is beneficial to save the adapter pipe connecting the third liquid cooling channel 510 and the fourth liquid cooling channel 420. On the one hand, the cost of manufacturing the motor electronic control assembly 100 is reduced, and on the other hand, it is beneficial to improve the integration degree of the motor electronic control assembly 100, making the structure of the motor electronic control assembly 100 relatively simple.

[0084] In some embodiments, the motor electronic control assembly 100 further includes a first sealing ring 810. The housing main body 300 is provided with a first contact surface, the first liquid passing port 363 is opened on the first contact surface, the first motor end cover 400 is provided with a second contact surface, the second liquid cooling channel 410 has a third liquid passing port, the third liquid passing port is opened on the second contact surface, the first contact surface and the second contact surface are connected, the first sealing ring 810 is arranged on the first contact surface and the second contact surface, and the first sealing ring 810 is used to seal the first contact surface and the second contact surface, thereby reducing the leakage of the coolant.

[0085] In some embodiments, the motor electronic control assembly 100 further includes a second sealing ring 820. The first motor end cover 400 is provided with a third contact surface, the second liquid cooling channel 410 has a fourth liquid passing port, the fourth liquid passing port is opened on the third contact surface, the electronic control heat dissipation component 500 is provided with a fourth contact surface, the third liquid cooling channel 510 has a fifth liquid passing port, the fifth liquid passing port is opened on the fourth contact surface, the third contact surface and the fourth contact surface are connected, the second sealing ring 820 is arranged on the third contact surface and the fourth contact surface, and the second sealing ring 820 is used to seal the third contact surface and the fourth contact surface, thereby reducing the leakage of the coolant.

[0086] In some embodiments, the motor electronic control assembly 100 further includes a third sealing ring 830. The electronic control heat dissipation component 500 is provided with a fifth contact surface, the third liquid cooling channel 510 has a sixth liquid passing port, the sixth liquid passing port is opened on the fifth contact surface, the first motor end cover 400 is provided with a sixth contact surface, the fourth liquid cooling channel 420 has a seventh liquid passing port, the seventh liquid passing port is opened on the sixth contact surface, the fifth contact surface and the sixth contact surface are connected, the third sealing ring 830 is arranged on the fifth contact surface and the sixth contact surface, and the third sealing ring 830 is used to seal the fifth contact surface and the sixth contact surface, thereby reducing the leakage of the coolant.

[0087] In some embodiments, the motor and electric control assembly 100 further includes an electric control power module 700. The first motor end cover 400 covers the electric control heat dissipation component 500 on the electric control power module 700. One end of the fourth liquid cooling channel 420 communicates with the third liquid cooling channel 510, and the other end is disposed outside the first motor end cover 400.

[0088] In some embodiments, in the axial direction of the housing main body 300, the second motor end cover 600, the housing main body 300, the first motor end cover 400, the electric control heat dissipation component 500, and the motor power module are arranged in sequence.

[0089] In addition, the motor and electric control assembly 100 further includes a liquid inlet pipe 840 and a liquid outlet pipe 850. The liquid inlet pipe 840 is disposed at the second liquid passing port 364. The fourth liquid cooling channel 420 has an eighth liquid passing port, and the liquid outlet pipe 850 is disposed at the eighth liquid passing port.

[0090] According to a third aspect of the present disclosure, there is provided an electric drive system, which includes the above-mentioned motor and electric control assembly 100. This electric drive system has all the beneficial effects of the above-mentioned motor and electric control assembly 100, and the present disclosure will not elaborate herein.

[0091] According to a fourth aspect of the present disclosure, there is provided a vehicle, which includes the above-mentioned electric drive system. This vehicle has all the beneficial effects of the above-mentioned electric drive system, and the present disclosure will not elaborate herein.

[0092] The vehicle may be a fuel vehicle, a plug-in hybrid vehicle, a new energy vehicle, etc., and the present disclosure does not make specific limitations thereto.

[0093] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0094] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0095] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.

[0096] The above are only the preferred embodiments of the present application and do not impose any form of limitation on the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.

Claims

1. A motor housing, characterized in that, Comprising: A housing main body for installing a motor. A liquid cooling cavity, a first liquid passing port, and a second liquid passing port are provided inside the housing main body. The first liquid passing port and the second liquid passing port are both communicated with the liquid cooling cavity, and the liquid cooling cavity is used for the coolant to flow through. And A heat dissipation part connected to the housing main body and arranged in the liquid cooling cavity to change the flow direction of the coolant.

2. The motor housing according to claim 1, characterized in that, The heat dissipation part and the housing main body define a first liquid cooling flow path. One end of the first liquid cooling flow path is communicated with the first liquid passing port, and the other end of the first liquid cooling flow path is communicated with the second liquid passing port. The first liquid cooling flow path is bent.

3. The motor housing according to claim 2, characterized in that, The housing main body is annular for surrounding the motor. The first liquid cooling flow path includes a first flow segment and a second flow segment. The first flow segment extends along the circumferential direction of the housing main body, and the second flow segment extends along the axial direction of the housing main body.

4. The motor housing according to claim 2, characterized in that, Axially of the housing main body, the cavity wall of the liquid cooling cavity includes a first cavity wall and a second cavity wall arranged opposite to each other. The heat dissipation part includes a first diversion part and a second diversion part. The first diversion part is connected to the first cavity wall and is spaced from the second cavity wall. The second diversion part is connected to the second cavity wall and is spaced from the first cavity wall. Circumferentially of the housing main body, the first diversion part and the second diversion part are spaced from each other.

5. The motor housing according to claim 4, characterized in that, Circumferentially of the housing main body, the first diversion part and the second diversion part are arranged opposite to each other.

6. The motor housing according to claim 4 or 5, characterized in that, The heat dissipation part further includes a third diversion part arranged between the first cavity wall and the second cavity wall. One end of the first diversion part close to the second cavity wall is connected to the third diversion part. Circumferentially of the housing main body, the third diversion part at least extends beyond one side of the first diversion part.

7. The motor housing according to claim 6, wherein, The heat dissipation part further includes a fourth diversion part arranged between the first cavity wall and the second cavity wall. One end of the second diversion part close to the first cavity wall is connected to the fourth diversion part. Circumferentially of the housing main body, the fourth diversion part at least extends beyond one side of the second diversion part.

8. The motor housing according to claim 7, characterized in that, Axially of the housing main body, the third diversion part is at least arranged opposite to one of the fourth diversion parts.

9. The motor housing according to claim 1, characterized in that, The first liquid passing port is configured as a first liquid inlet hole. In the depth direction of the first liquid passing port, the heat dissipation part and the first liquid passing port are arranged in a staggered manner.

10. An electric motor and electronic control assembly, characterized in that, Including the motor housing according to any one of claims 1 to 9.

11. The motor and electronic control assembly according to claim 10, characterized in that, The motor electric control assembly includes a first motor end cover. Axially of the housing main body, the first motor end cover covers one end of the housing main body. The first motor end cover is provided with a second liquid cooling flow path for the coolant to flow through. The second liquid cooling flow path is communicated with the first liquid passing port.

12. The motor and its electronic control assembly according to claim 11, characterized in that, The first motor end cover is in contact with the housing main body to conduct the second liquid cooling flow path and the first liquid passing port.

13. The motor and electronic control assembly according to claim 12, wherein Axially of the housing main body, the housing main body and the first motor end cover are inserted into each other.

14. The motor and electronic control assembly according to claim 11, wherein The second liquid cooling flow path extends along the axial direction of the housing main body.

15. The motor and electric control assembly according to claim 11, wherein, The motor and electronic control assembly further includes an electronic control heat dissipation component, the electronic control heat dissipation component is provided with a third liquid cooling flow channel, the third liquid cooling flow channel is used for the coolant to flow through, and the third liquid cooling flow channel is communicated with the second liquid cooling flow channel.

16. The motor and electronic control assembly according to claim 15, characterized in that, The first motor end cover conducts the second liquid cooling flow channel and the third liquid cooling flow channel by contacting the electronic control heat dissipation component.

17. The motor and electronic control assembly according to claim 15, wherein The first motor end cover is provided with a fourth liquid cooling flow channel, and the fourth liquid cooling flow channel is conducted with the second liquid cooling flow channel through the third liquid cooling flow channel.

18. The motor and electric control assembly according to claim 17, wherein The first motor end cover conducts the third liquid cooling flow channel and the fourth liquid cooling flow channel by contacting the electronic control heat dissipation component.

19. An electric drive system, characterized in that, It includes the motor and electronic control assembly according to any one of claims 10 to 18.

20. A vehicle, characterized in that, It includes the electric drive system according to claim 19.

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