Electric drive cooling structure and electric drive system

Abstract

The utility model relates to an electric drive cooling structure and an electric drive system, the electric drive cooling structure is used for the electric drive system, and the electric drive cooling structure comprises an oil cooler; the channel base is arranged in the controller shell and is provided with a first channel, and the first channel is communicated with a water cooling structure of the motor controller; the channel rib extends from the side, away from the oil cooler, of the controller shell to the side, close to the oil cooler, of the controller shell, a second channel is formed in the channel rib, and the second channel communicates with the first channel; and an inner hole of the communicating hose is communicated with the second channel and the water channel of the oil cooler. Compared with the scheme that communication is conducted completely through a hose, the device has a shorter stroke and a better path, and meanwhile the hose is relatively short and needs to be additionally fixed; compared with the scheme that all the channels are used for communication, the problems that when the arc-shaped channel is formed in the motor shell, the structure is complex, manufacturing is not changed, and cost is increased can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of cooling structures, and in particular to an electric drive cooling structure and an electric drive system. Background Art

[0002] The electric drive system of a new energy vehicle may include a motor and a motor controller. Since the motor controller is usually arranged directly on the motor, the motor housing of the motor may be integrated with the controller housing of the motor controller, for example, the controller housing is integrally formed and arranged on the outside of the motor housing. The motor and the motor controller may be provided with corresponding cooling structures to achieve their own cooling and temperature reduction. The motor may be cooled by oil, while the motor controller may be cooled by water. The oil cooling structure of the motor may include an oil cooler, which is a heat exchange device that can exchange heat with the cooling oil passing through it through cooling water to ensure the cooling effect of the cooling oil on the motor. The water cooling structure of the motor controller may include a water channel arranged on the controller housing or in a water cooling screen, and cooling water is circulated in the water channel. The existing integrated motor housing and controller housing may connect the water channel with the oil cooler to exchange heat with the cooling oil of the motor through the cooling water of the motor controller, thereby simplifying the cooling structure of the electric drive system. However, in the prior art, the water channel and the oil cooler are usually connected through a hose wrapped around the outside of the controller housing and the motor housing, which has a long stroke, an unoptimal path, and is difficult to effectively fix with a long hose; or they are connected through a channel arranged inside the controller housing and the motor housing, but the structures of the controller housing and the motor housing are relatively complex, and the preparation and molding of the channel is inconvenient and the preparation cost is high. Utility Model Content

[0003] Based on this, the present application provides an electric drive cooling structure and an electric drive system to improve the problems in the prior art that when the water channel and the oil cooler are usually connected through a hose, the stroke is too long, the path is not optimal, and the long hose is difficult to effectively fix; or when the connection is through a channel, the structures of the controller housing and the motor housing are relatively complex, the preparation and molding of the oil channel is unchanged, and the preparation cost is high.

[0004] In a first aspect, the present application provides an electric drive cooling structure, the electric drive cooling structure is used for an electric drive system, the electric drive system includes a motor and a motor controller, the motor includes a motor housing, the motor controller includes a controller housing, the controller housing is integrally formed and arranged on the outside of the motor housing, the electric drive cooling structure includes:

[0005] An oil cooler, which is arranged outside the motor housing and close to the controller housing;

[0006] A channel base, which is arranged in the controller housing and is provided with a first channel, wherein the first channel is communicated with the water cooling structure of the motor controller;

[0007] a channel rib extending from a side of the controller housing away from the oil cooler to a side of the controller housing close to the oil cooler, the channel rib intersecting with the channel base, and a second channel being arranged in the channel rib, the second channel being communicated with the first channel;

[0008] A connecting hose is arranged outside the motor housing and the controller housing, and is arranged between the end of the channel rib extending to the controller housing close to the oil cooler and the oil cooler, and the inner hole of the connecting hose is connected to the second channel and the water channel of the oil cooler.

[0009] In one embodiment, the channel base includes a base body and a base cover, the base body is arranged on the controller housing, the base cover is connected to the base body, and the water cooling structure of the motor controller is connected to the first channel through the base cover.

[0010] In one embodiment, the base cover plate and the base body are connected by friction welding.

[0011] In one of the embodiments, the second channel is configured as a machined hole, and an end of the second channel away from the oil cooler passes through the controller housing and is blocked by a plug.

[0012] In one embodiment, the motor housing partially extends into the controller housing, and the channel ribs include a first channel rib and a second channel rib, the first channel rib and the second channel rib are arranged to intersect, the first channel rib is arranged on the inner side of the controller housing, and the second channel rib is arranged on the outer side of the motor housing, a third channel and a fourth channel are respectively arranged in the first channel rib and the second channel rib, and the second channel is formed by a combination of the third channel and the fourth channel.

[0013] In one of the embodiments, the channel rib extends to the end of the controller housing close to the oil cooler and extends outside the motor controller to form a connecting end, and the connecting hose is connected to the connecting end.

[0014] In one of the embodiments, the connecting hose is connected to the connecting end via an intermediate joint, and the intermediate joint is plug-fitted with the connecting hose and the connecting end.

[0015] In one of the embodiments, the water cooling structure of the motor controller is a water cooling screen, and the water cooling screen is detachably connected to the channel base.

[0016] In one of the embodiments, a connecting hole is provided on the top of the channel base, and the connecting hole penetrates into the first channel. The channel base is also provided with a plug interface on the outside of the connecting hole. A water outlet pipe is provided on the water cooling screen, and the water outlet pipe is plugged into the plug interface.

[0017] In a second aspect, the present application provides an electric drive system, which includes any electric drive cooling structure provided in the present application.

[0018] Compared with the solution in which the water-cooling structure of the motor controller and the oil cooler are all connected through a hose, the electric drive cooling structure provided by the present application has a shorter stroke and a better path, and the hose is relatively short and requires additional fixation; and compared with the solution in which the water-cooling structure of the motor controller and the oil cooler are all connected through a channel, the electric drive cooling structure provided by the present application can avoid the problems of complex structure, unchanged preparation and increased cost caused by opening an arc channel on the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the electric drive cooling structure provided in Example 1 of the present application;

[0020] Figure 2 An exploded view of the electric drive cooling structure provided in Example 1 of the present application;

[0021] Figure 3 A cross-sectional view of the electric drive cooling structure provided in Example 1 of the present application showing the first channel and the second channel.

[0022] Figure numerals: 100, oil cooler; 110, water channel inlet; 200, channel base; 210, first channel; 220, base body; 230, base cover; 240, connecting hole; 250, plug interface; 300, channel rib; 310, second channel; 320, first channel rib; 330, second channel rib; 340, third channel; 350, fourth channel; 360, connecting end; 400, connecting hose; 500, plug; 600, motor housing; 700, controller housing; 800, intermediate joint. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0025] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0027] Embodiment 1

[0028] The first embodiment of the present application provides an electric drive cooling structure, which is used for an electric drive system. The electric drive system includes a motor and a motor controller. The motor includes a motor housing 600, and the motor controller includes a controller housing 700. The controller housing 700 is integrally formed and arranged on the outside of the motor housing 600. The electric drive cooling structure includes:

[0029] The oil cooler 100 is arranged outside the motor housing 600 and close to the controller housing 700;

[0030] A channel base 200 is disposed in the controller housing 700 and is provided with a first channel 210, and the first channel 210 is communicated with the water cooling structure of the motor controller;

[0031] A channel rib 300 extends from a side of the controller housing 700 away from the oil cooler 100 to a side of the controller housing 700 close to the oil cooler 100, the channel rib 300 intersects with the channel base 200, and a second channel 310 is provided in the channel rib 300, and the second channel 310 is communicated with the first channel 210;

[0032] The connecting hose 400 is arranged outside the motor housing 600 and the controller housing 700, and is arranged between the end of the channel rib 300 extending to the controller housing 700 close to the oil cooler 100 and the oil cooler 100. The inner hole of the connecting hose 400 is connected to the second channel 310 and the water channel structure of the oil cooler 100.

[0033] like Figure 1As shown, in this embodiment, it is exemplarily explained that the electric drive system may include a drive motor and / or a generator, that is, the motor of the electric drive system may be one of a drive motor and a generator, and this embodiment is explained by taking the drive motor as an example. The motor may include a motor housing 600 and components such as a stator assembly and a rotor assembly arranged in the motor housing 600, wherein the motor housing 600 may be set as a cylindrical housing, which includes a circumferential side wall. The motor controller may include a controller housing 700 and components such as a capacitor and a filter arranged in the controller housing 700, wherein the controller housing 700 may be provided with a square tube-shaped housing, which may be integrally formed with the motor housing 600, and may be arranged on the outside of the motor housing 600. The length direction of the controller housing 700 may be the axial direction of the motor housing 600, and the controller housing 700 may be set to be equal in length to the motor housing 600.

[0034] like Figure 1 As shown, in this embodiment, an oil cooler 100 is provided on the motor housing 600, and the oil cooler 100 can be detachably provided on the outer side of the motor housing 600 by bolts and other components, and can be provided close to the controller housing 700. In more detail, the oil cooler 100 can also be provided close to one end of the motor housing 600, and the oil cooler 100 is close to a corner of the controller housing 700. A water channel and an oil channel can be provided in the oil cooler 100, and the oil cooler 100 can be provided with a water channel inlet 110 and a water channel outlet, and the water channel inlet 110 and the water channel outlet can be pipe joints to facilitate the cooling water to enter and discharge the water channel. Correspondingly, the oil cooler 100 can also be provided with an oil channel inlet and an oil channel outlet to facilitate the cooling oil to enter and discharge the oil channel. When the cooling water and the cooling oil circulate in the oil cooler 100, the cooling water can exchange heat with the cooling oil to ensure the cooling effect of the cooling oil.

[0035] like Figure 1 and Figure 2 As shown, the motor controller may be provided with a water cooling structure, and the water cooling structure of the motor controller may be communicated with the water channel inlet 110 of the oil cooler 100, so as to use the cooling water of the motor controller to exchange heat with the cooling oil of the motor. The water cooling structure of the motor controller may be communicated with the water channel inlet 110 of the oil cooler 100 through the first channel 210, the second channel 310 and the connecting hose 400 in sequence.

[0036] like Figure 1 and Figure 2 As shown, the first channel 210 may be disposed in the channel base 200 , and the channel base 200 may be configured in a strip shape and may be disposed in the controller housing 700 . The outlet of the water cooling structure of the motor controller may be communicated with the first channel 210 .

[0037] like Figure 1 and Figure 3 As shown, the second channel 310 can be arranged in the channel rib 300, and the channel rib 300 can be integrally formed with the controller housing 700 and the motor housing 600, and extends from the side of the controller away from the oil cooler 100 to the side of the controller housing 700 close to the oil cooler 100, that is, the extension path of the channel rib 300 covers both sides of the width direction of the controller housing 700. The channel rib 300 also passes through the corresponding position of the channel base 200 during the extension process, so that the second channel 310 can be connected with the first channel 210. The connecting hose 400 can be arranged outside the controller housing 700 and the motor housing 600, and its two ends are respectively connected to the end of the channel rib 300 extending to the side of the controller housing 700 close to the oil cooler 100 and the water channel inlet 110 of the oil cooler 100, so that the inner hole of the connecting hose 400 can connect the second channel 310 with the water channel of the oil cooler 100.

[0038] It is understandable that, since the controller housing 700 has a relatively regular side wall, when preparing a channel on the controller housing 700, the channel can extend in a straight line without turning, so it is more convenient to prepare a channel on the controller housing 700. However, since the side wall of the motor housing 600 is cylindrical, when preparing a channel on the motor housing 600, the channel needs to extend in an arc shape, which is inconvenient.

[0039] In the present application, the first channel 210 and the second channel 310 are formed in the channel base 200 and the channel rib 300 in the controller housing 700 where it is convenient to prepare the channel, while outside the motor housing 600 where it is not convenient to prepare the channel, the channel is replaced by a connecting hose 400, and the water-cooling structure of the motor controller can be connected to the oil cooler 100 through the first channel 210, the second channel 310 and the connecting hose 400 in sequence.

[0040] Compared with the solution in which the water cooling structure of the motor controller is connected to the oil cooler 100 through a hose, the electric drive cooling structure provided in the present application has a shorter stroke and a better path, and the hose is relatively short and requires additional fixation; and compared with the solution in which the water cooling structure of the motor controller is connected to the oil cooler 100 through a channel, the electric drive cooling structure provided in the present application can avoid the problems of complex structure, unchanged preparation and increased cost caused by opening an arc channel on the motor housing 600.

[0041] Specifically, the channel base 200 includes a base body 220 and a base cover 230 . The base body 220 is disposed on the controller housing 700 . The base cover 230 is connected to the base body 220 . The water cooling structure of the motor controller is connected to the first channel 210 through the base cover 230 .

[0042] like Figure 1 and Figure 2As shown, in this embodiment, it is exemplarily explained that the base body 220 can be integrally formed and arranged on the controller housing 700, and it can be arranged in an open groove shape; that is, the inside of the groove of the base body 220 can be cast. The opening of the base body 220 can be arranged at the top of the base body 220; the base cover plate 230 can be arranged at the opening of the base body 220, and the outer contour of the base cover plate 230 can be the same as the opening shape of the base body 220. The base cover plate 230 can be fixed on the top of the base body 220 to enclose the first channel 210 with the base body 220. One end of the base body 220 in the length direction can extend to the channel rib 300, and can be arranged through the channel rib 300 so that the first channel 210 is connected with the second channel 310. The other end of the base body 220 in the length direction can be set as a closed end, and the water cooling structure of the motor controller passes through the base cover plate 230 to communicate with the first channel 210.

[0043] It is understandable that this embodiment, by configuring the channel base 200 as a base body 220 and a base cover 230 , facilitates the preparation and molding of the first channel 210 in the controller housing 700 , so as to further achieve the connection between the water cooling structure of the motor controller and the oil cooler 100 .

[0044] More specifically, the base cover plate 230 and the base body 220 are connected by friction welding.

[0045] like Figure 1 and Figure 2 As shown, in this embodiment, the connection method of the base cover plate 230 and the base body 220 can be welding, and specifically can be friction welding. This embodiment adopts the connection method of friction welding, which can not only improve the convenience of the preparation process, but also ensure the airtightness and stability of the connection between the base cover plate 230 and the base body 220.

[0046] Of course, in some embodiments, the base cover plate 230 and the base body 220 may also be welded by other methods. In other embodiments, the base cover plate 230 and the base body 220 may also be bonded, connected by screws or other components.

[0047] Specifically, the second channel 310 is configured as a machined hole, and one end of the second channel 310 away from the oil cooler 100 passes through the controller housing 700 and is blocked by a plug 500 .

[0048] In this embodiment, it is exemplified that, unlike the first channel 210, the second channel 310 can be prepared and formed by machining. Since the space on the side of the controller housing 700 away from the oil cooler 100 is not restricted by the oil cooler 100 and the motor housing 600, drilling can be performed from the side of the controller housing 700 away from the oil cooler 100 to the direction where the oil cooler 100 is located to form the second channel 310. It is not difficult to see that the end of the second channel 310 away from the oil cooler 100 will penetrate the side of the controller housing 700 away from the oil cooler 100, and the connection between the second channel 310 and the first channel 210 is located in the middle of the extension path of the second channel 310, and specifically can be the front middle part. When the cooling water enters the second channel 310 from the first channel 210, in order to prevent the cooling water from leaking from the end of the second channel 310 away from the oil cooler 100, the end of the second channel 310 away from the oil cooler 100 can be blocked, and specifically can be blocked by a plug 500, and the plug 500 can be a screw plug.

[0049] It can be understood that in this embodiment, the second channel 310 is set as a machined hole prepared from the side of the controller housing 700 away from the oil cooler 100, and the end of the second channel 310 away from the oil cooler 100 is blocked by the plug 500, so as to facilitate the preparation of the second channel 310 and further realize the connection between the water cooling structure of the motor controller and the oil cooler 100.

[0050] More specifically, the motor housing 600 partially extends into the controller housing 700, and the channel rib 300 includes a first channel rib 320 and a second channel rib 330. The first channel rib 320 and the second channel rib 330 are arranged to intersect each other, the first channel rib 320 is arranged on the inner side of the controller housing 700, and the second channel rib 330 is arranged on the outer side of the motor housing 600. The third channel 340 and the fourth channel 350 are respectively arranged in the first channel rib 320 and the second channel rib 330, and the second channel 310 is formed by combining the third channel 340 and the fourth channel 350.

[0051] like Figure 2 and Figure 3As shown, in this embodiment, the motor housing 600 can be partially extended into the controller housing 700, so that the bottom part of the controller housing 700 is formed by the motor housing 600. When the channel rib 300 extends from the side of the controller housing 700 away from the oil cooler 100 to the side of the controller housing 700 close to the oil cooler 100, the channel rib 300 can extend horizontally in the direction of looking down at the motor housing 600 to form a first channel rib 320, and the first channel rib 320 can be arranged on the inner side wall of the controller housing 700; then it extends obliquely in the direction close to the oil cooler 100 to form a second channel rib 330, and the second channel rib 330 can be arranged at an obtuse angle with the first channel rib 320. The first channel rib 320 and the second channel rib 330 can be respectively provided with a third channel 340 and a fourth channel 350, and the third channel 340 is connected with the fourth channel 350 to form a second channel 310. The third channel 340 and the fourth channel 350 can both be machined holes, and during machining, the third channel 340 and the fourth channel 350 can be drilled from their ends away from each other to their intersection, and the plug 500 can be set at one end of the third channel 340 away from the fourth channel 350.

[0052] It can be understood that this embodiment, by configuring the second channel 310 to be segmented into the third channel 340 and the fourth channel 350, can avoid the second channel 310 being too long and reduce the difficulty of preparing the second channel 310, while ensuring the accuracy and precision of the preparation of the second channel 310.

[0053] Specifically, the channel rib 300 extends to the end of the controller housing 700 close to the oil cooler 100 and extends outside the motor controller to form a connecting end 360 , and the connecting hose 400 is connected to the connecting end 360 .

[0054] like Figure 2 and Figure 3 As shown, in this embodiment, it is exemplarily explained that the channel rib 300 extends to the end of the controller housing 700 close to the oil cooler 100, that is, the channel rib 300 extends toward the oil cooler 100 and is arranged close to the oil cooler 100. When extending, it passes through the side wall of the controller housing 700 and extends out of the controller housing 700. This end is the connecting end 360 and is used to be connected to the connecting hose 400.

[0055] It is understandable that in this embodiment, the connecting end portion 360 is provided to facilitate the connection of the connecting hose 400 , so as to further facilitate the inner hole of the connecting hose 400 to connect the second channel 310 and the water channel of the oil cooler 100 .

[0056] More specifically, the connecting hose 400 is connected to the connecting end portion 360 via an intermediate joint 800 , and the intermediate joint 800 is plug-fitted with the connecting hose 400 and the connecting end portion 360 .

[0057] like Figure 1 and Figure 2 As shown, in this embodiment, the intermediate joint 800 can be set as a structure with smaller ends and a larger middle part, and its two ends can be respectively inserted into the connecting end 360 and the connecting hose 400 to achieve plugging, so as to connect the connecting hose 400 and the connecting end 360. The plugging of the intermediate joint 800 with the connecting end 360 and the connecting hose 400 can be an interference fit to ensure stability during plugging.

[0058] It can be understood that in this embodiment, the connecting hose 400 is connected to the connecting end 360 via the intermediate joint 800 , which can improve the convenience and stability of the connection between the connecting hose 400 and the connecting end 360 .

[0059] Specifically, the water cooling structure of the motor controller is a water cooling screen, and the water cooling screen is detachably connected to the channel base 200 .

[0060] like Figure 1 and Figure 2 As shown, in this embodiment, it is exemplarily explained that the water cooling screen can be detachably arranged in the controller housing 700, for example, the water cooling screen is connected to the controller housing 700 by bolts and other components. The water cooling screen can also be positioned by pins on the controller housing 700 to be accurately installed in place. At the same time, the water cooling screen is detachably connected to the channel base 200. When the water cooling screen is arranged in place in the controller housing 700, it is connected to the channel base 200.

[0061] It can be understood that when the motor controller is cooled by a water-cooling screen, this embodiment detachably connects the water-cooling screen to the channel base 200 to facilitate connecting the water-cooling screen to the first channel 210, so that the water-cooling screen can be further connected to the water channel of the oil cooler 100.

[0062] More specifically, a connecting hole 240 is provided on the top of the channel base 200 , and the connecting hole 240 penetrates into the first channel 210 . The channel base 200 is also provided with a plug port 250 on the outside of the connecting hole 240 . A water outlet pipe is provided on the water cooling screen, and the water outlet pipe is plugged into the plug port 250 .

[0063] like Figure 1 and Figure 2As shown, in this embodiment, it is exemplarily explained that the connecting hole 240 can be provided on the base cover plate 230, and it can be set as a circular hole. The connecting hole 240 can be set through the base cover plate 230. The plug interface 250 can also be provided on the base cover plate 230, and the plug interface 250 can be non-through-through on the base cover plate 230, that is, the plug interface 250 can be set as a countersunk hole. The plug interface 250 can be set in a circular ring shape, and the connecting hole 240 can be set on the inner side of the plug interface 250. A water outlet pipe can be provided on the water-cooled screen, and the cooling water can be discharged from the water outlet pipe. The water outlet pipe can be plugged into the plug interface 250 so that the water-cooled screen is connected to the first channel 210.

[0064] It can be understood that in this embodiment, by providing a connecting hole 240 and a plug port 250 at the top of the base and plugging the water outlet pipe of the water cooling screen into the plug port 250 , it is convenient to connect the water cooling screen with the first channel 210 .

[0065] The implementation principle of an electric drive cooling structure provided in the first embodiment of the present application is:

[0066] During preparation, the controller housing 700 and the motor housing 600 are integrally formed, and the channel base 200, the first channel rib 320 and the second channel rib 330 are prepared in the controller housing 700. Then, the third channel 340 is formed in the first channel rib 320 by machining, and the fourth channel 350 is formed in the second channel rib 330, and the third channel 340 is connected with the fourth channel 350 to form the second channel 310. Then, the end of the third channel 340 away from the fourth channel 350 is blocked by the plug 500. Then, the base cover plate 230 is set on the top of the channel base 200 by friction welding. Then, the intermediate joint 800 is set on the connecting end 360, and the two ends of the connecting hose 400 are respectively set on the intermediate joint 800 and the water channel inlet 110 of the oil cooler 100. Then, the water cooling screen is arranged in the controller housing 700. When arranged, the water outlet pipe of the water cooling screen is plugged into the plug port 250. When the cooling water flows through the water cooling screen and is discharged from the water outlet pipe, the cooling water may flow through the first channel 210 , the second channel 310 and the connecting hose 400 in sequence, and then enter the water channel of the oil cooler 100 from the water channel inlet 110 of the oil cooler 100 .

[0067] Compared with the solution in which the water cooling structure of the motor controller is connected to the oil cooler 100 through a hose, the electric drive cooling structure provided in the present application has a shorter stroke and a better path, and the hose is relatively short and requires additional fixation; and compared with the solution in which the water cooling structure of the motor controller is connected to the oil cooler 100 through a channel, the electric drive cooling structure provided in the present application can avoid the problems of complex structure, unchanged preparation and increased cost caused by opening an arc channel on the motor housing 600.

[0068] Embodiment 2

[0069] Embodiment 2 of the present application provides an electric drive system, and the electric drive system includes any one of the electric drive cooling structures provided in the present application.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An electric drive cooling structure, the electric drive cooling structure is used for an electric drive system, the electric drive system comprises a motor and a motor controller, the motor comprises a motor housing (600), the motor controller comprises a controller housing (700), the controller housing (700) is integrally formed and arranged on the outside of the motor housing (600), characterized in that: The electric drive cooling structure comprises: An oil cooler (100) is arranged outside the motor housing (600) and close to the controller housing (700); A channel base (200) is arranged in the controller housing (700) and is provided with a first channel (210), wherein the first channel (210) is communicated with a water cooling structure of the motor controller; a channel rib (300) extending from a side of the controller housing (700) away from the oil cooler (100) to a side of the controller housing (700) close to the oil cooler (100), the channel rib (300) intersecting with the channel base (200), and a second channel (310) being provided in the channel rib (300), the second channel (310) being in communication with the first channel (210); A connecting hose (400) is arranged outside the motor housing (600) and the controller housing (700), and is arranged between the end of the channel rib (300) extending to the controller housing (700) on the side close to the oil cooler (100) and the oil cooler (100), and the inner hole of the connecting hose (400) is connected to the second channel (310) and the water channel of the oil cooler (100).

2. The electric drive cooling structure according to claim 1, characterized in that: The channel base (200) comprises a base body (220) and a base cover plate (230); the base body (220) is arranged on the controller housing (700); the base cover plate (230) is connected to the base body (220); and the water cooling structure of the motor controller passes through the base cover plate (230) and is connected to the first channel (210).

3. The electric drive cooling structure according to claim 2, characterized in that: The base cover plate (230) and the base body (220) are connected by friction welding.

4. The electric drive cooling structure according to claim 1, characterized in that: The second channel (310) is configured as a machined hole, and one end of the second channel (310) away from the oil cooler (100) passes through the controller housing (700) and is sealed by a plug (500).

5. The electric drive cooling structure according to claim 4, characterized in that: The motor housing (600) partially extends into the controller housing (700); the channel rib (300) comprises a first channel rib (320) and a second channel rib (330); the first channel rib (320) and the second channel rib (330) are arranged to intersect each other; the first channel rib (320) is arranged on the inner side of the controller housing (700); the second channel rib (330) is arranged on the outer side of the motor housing (600); a third channel (340) and a fourth channel (350) are respectively arranged in the first channel rib (320) and the second channel rib (330); the second channel (310) is formed by combining the third channel (340) and the fourth channel (350).

6. The electric drive cooling structure according to claim 1, characterized in that: The channel rib (300) extends to the end of the controller housing (700) close to the oil cooler (100) and extends outside the motor controller to form a connecting end (360), and the connecting hose (400) is connected to the connecting end (360).

7. The electric drive cooling structure according to claim 6, characterized in that: The connecting hose (400) is connected to the connecting end portion (360) via an intermediate joint (800), and the intermediate joint (800) is plug-fitted to the connecting hose (400) and the connecting end portion (360).

8. The electric drive cooling structure according to claim 1, characterized in that: The water cooling structure of the motor controller is a water cooling screen, and the water cooling screen is detachably connected to the channel base (200).

9. The electric drive cooling structure according to claim 8, characterized in that: A connecting hole (240) is provided at the top of the channel base (200), and the connecting hole (240) penetrates into the first channel (210). The channel base (200) is also provided with a plug interface (250) on the outside of the connecting hole (240), and a water outlet pipe is provided on the water cooling screen, and the water outlet pipe is plugged into the plug interface (250).

10. An electric drive system, characterized in that: The electric drive system comprises the electric drive cooling structure according to any one of claims 1 to 9.

Images