Electric drive system

Abstract

The utility model provides an electric drive system which comprises a first shell, a power mechanism and a controller. The first shell is provided with an inner cavity, and the inner cavity comprises a first chamber and a second chamber which are arranged in the third direction; the first cavity comprises a first area and a second area, and the second area comprises a second sub-area and a first sub-area which are arranged in the second direction; the first region and the second sub-region are arranged along the first direction, and the first region and the first sub-region are also arranged along the second direction; the second chamber comprises a third area, a fourth area and a fifth area; the third area and the fourth area are arranged along the first direction, and the fourth area and the fifth area are arranged along the second direction; the first direction, the second direction and the third direction are vertical in pairs; the power mechanism comprises a motor and a reduction gearbox, the motor is at least partially arranged in the first area, and the reduction gearbox is at least partially arranged in the second area; the controller comprises an inverter, a charging and distribution unit and a high-voltage distribution box; one of the inverter and the charging and distribution unit is arranged in the third area, the other one is arranged in the fourth area, and the high-voltage distribution box is arranged in the fifth area.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts, and specifically relates to an electric drive system. Background Art

[0002] The existing three-in-one electric drive system includes a power electronic controller (PEU), an electric motor (EM), and a reduction gearbox (GB). These components are split structures, so the three-in-one electric drive system has the problems of low integration, large size and heavy weight. Utility Model Content

[0003] The utility model aims to provide an electric drive system, which has the advantages of high integration, small size and light weight.

[0004] To achieve the above object, the utility model provides an electric drive system, comprising:

[0005] A first shell has an inner cavity, the inner cavity includes a first cavity and a second cavity arranged along a third direction; the first cavity includes a first area and a second area, the second area includes a second sub-area and a first sub-area arranged along the second direction; the first area and the second sub-area are arranged along the first direction, and the first area and the first sub-area are also arranged along the second direction; the second cavity includes a third area, a fourth area and a fifth area, the third area and the fourth area are arranged along the first direction, and the fourth area and the fifth area are arranged along the second direction; the first direction, the second direction and the third direction are perpendicular to each other;

[0006] A power mechanism, comprising a motor and a reduction box; the motor is at least partially disposed in the first area, the reduction box is at least partially disposed in the second area and connected to an output end of the motor; and,

[0007] The controller includes an inverter, a charging and distribution unit and a high-voltage distribution box; one of the inverter and the charging and distribution unit is arranged in the third area, and the other is arranged in the fourth area; the high-voltage distribution box is arranged in the fifth area.

[0008] Optionally, the second chamber further includes a sixth area, the third area and the sixth area are arranged along the second direction; the sixth area is also arranged along the first direction with the fourth area, or the sixth area is also arranged along the first direction with the fifth area;

[0009] The controller further includes a filter component, and the filter component is disposed in the sixth area.

[0010] Optionally, the inverter is arranged in the third area, and the inverter includes a first copper bar; the cable of the first copper bar is located on a side of the inverter away from the reduction box; the motor includes a second copper bar, the second copper bar is connected to the stator of the motor, and the cable of the second copper bar is located on a side of the motor away from the reduction box;

[0011] The electric drive system includes a high-voltage connection socket, which is sealed and connected to the first shell and is located on the side of the inverter away from the reduction gearbox. The high-voltage connection socket is arranged in the inner cavity and is located at the boundary between the first chamber and the second chamber; the high-voltage connection socket is respectively connected to the cables of the first copper busbar and the cables of the second copper busbar.

[0012] Optionally, the reduction box includes an oil pipe; the electric drive system further includes a heat exchanger, which is arranged outside the first shell and connected to the first shell; the heat exchanger has a first heat exchange inlet end and a first heat exchange outlet end which are interconnected, and the first heat exchange inlet end is connected to the outlet end of the oil pipe;

[0013] The first shell is provided with a first oil channel and a second oil channel in parallel; the inlet end of the first oil channel and the inlet end of the second oil channel are both connected to the first heat exchange outlet end; the outlet end of the first oil channel is connected to the first chamber and is arranged corresponding to the stator of the motor; the outlet end of the second oil channel is connected to the first chamber and is arranged corresponding to the rotor of the motor.

[0014] Optionally, the electric drive system further includes an oil pump and an oil filter, and the oil pump and the oil filter are both arranged in the inner cavity; the outlet end of the oil pump, the oil filter and the inlet end of the oil pipe are connected in sequence;

[0015] An oil return groove is also formed on the first housing; the oil return groove is communicated with the first chamber and is used to receive the oil flowing through the stator and rotor of the motor, and the oil return groove is also communicated with the inlet end of the oil pump.

[0016] Optionally, the charging and distribution unit includes a second shell, on which a first cooling water channel is provided; the inverter includes a water-cooling plate, on which a second cooling water channel is provided, and an inlet end of the second cooling water channel is connected to an outlet end of the first cooling water channel.

[0017] Optionally, the electric drive system further includes a heat exchanger, which is disposed outside the first shell and connected to the first shell; the heat exchanger further has a second heat exchange inlet end and a second heat exchange outlet end which are connected to each other; the second heat exchange outlet end of the heat exchanger is connected to the outside of the first shell;

[0018] The outlet end of the second cooling water flow channel is communicated with the second heat exchange inlet end of the heat exchanger.

[0019] Optionally, the electric drive system includes a connector assembly, which is arranged on the first housing and located on a side of the reduction gearbox away from the motor.

[0020] Optionally, the connector assembly includes at least one of a low voltage connector, a high voltage connector, an AC slow charging connector, a 12V connector, a PTC and an ACP connector.

[0021] Optionally, the charging and distribution unit includes a DC / DC conversion module and an on-board charger module.

[0022] Compared with the prior art, the electric drive system of the utility model has the following advantages:

[0023] The aforementioned electric drive system includes a first shell, a power mechanism and a controller; the first shell has an inner cavity, and the inner cavity includes a first chamber and a second chamber arranged along a third direction; the first chamber includes a first area and a second area, and the second area includes a second sub-area and a first sub-area arranged along the second direction; the first area and the second sub-area are arranged along the first direction, and the first area is also arranged along the second direction with the first sub-area; the second chamber includes a third area, a fourth area and a fifth area; the third area and the fourth area are arranged along the first direction, and the fourth area and the fifth area are arranged along the second direction; the first direction, the second direction and the third direction are perpendicular to each other; the power mechanism includes a motor and a reduction box, the motor is at least partially arranged in the first area, and the reduction box is at least partially arranged in the second area; the controller includes an inverter, a charging and distribution unit and a high-voltage distribution box; one of the inverter and the charging and distribution unit is arranged in the third area, the other is arranged in the fourth area, and the high-voltage distribution box is arranged in the fifth area. The integration of the electric drive system is improved and the weight of the electric drive system is reduced by integrating the inverter, the charging and distribution unit, the high-voltage distribution box, the motor and the reduction gearbox into the first shell; the three-dimensional size of the electric drive system is optimized by rationally arranging the inverter, the charging and distribution unit, the high-voltage distribution box, the motor and the reduction gearbox, so as to achieve the effect of reducing the volume of the electric drive system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation on the present invention.

[0025] Figure 1It is a structural schematic diagram of an electric drive system provided by the utility model according to an embodiment;

[0026] Figure 2 is a schematic diagram of the structure of an electric drive system provided by the utility model according to an embodiment, Figure 2 and Figure 1 The observation direction is different;

[0027] Figure 3 1 is a partial structural schematic diagram of an electric drive system provided by the present utility model according to an embodiment, wherein a first chamber is shown in the figure, and a first sub-area and a second sub-area are separated by a dotted line in the figure;

[0028] Figure 4 It is a structural schematic diagram of an electric drive system provided by the utility model according to an embodiment, and the figure shows a power mechanism;

[0029] Figure 5 It is a partial structural schematic diagram of the electric drive system provided by the utility model according to the first embodiment, and the second chamber is shown in the figure;

[0030] Figure 6 It is a partial structural schematic diagram of the electric drive system provided by the utility model according to the first embodiment, and the controller is shown in the figure;

[0031] Figure 7 yes Figure 5 and Figure 6 A cross-sectional view of the electric drive system shown;

[0032] Figure 8 1 is a schematic diagram of the structure of the electric drive system provided by the utility model according to the first embodiment, in which a controller is shown, and a first cooling water flow channel and a second cooling water flow channel are also identified;

[0033] Fig. 9 It is a partial structural schematic diagram of the electric drive system provided by the utility model according to the first embodiment, and the figure shows the connector assembly;

[0034] Fig.10 is a structural schematic diagram of the electric drive system provided by the utility model according to the second embodiment, and the figure shows the second chamber;

[0035] Fig.11 It is a structural schematic diagram of the electric drive system provided by the second embodiment of the present utility model, in which a controller is shown;

[0036] Fig.12 yes Fig.10 and Fig.11 A cross-sectional view of the electric drive system shown.

[0037] [Description of reference numerals is as follows]:

[0038] 100-electric drive system, 1000-first shell, 1001-shell body, 1002-motor rear end cover, 1003-high voltage cover plate, 1100-inner cavity, 1110-first chamber, 1111-first area, 1112-second area, 1112a-first sub-area, 1112b-second sub-area, 1120-second chamber, 1121-third area, 1122-fourth area, 1123-fifth area, 1124-sixth area, 2000-power mechanism, 2100-motor, 2 200-reduction gearbox, 3000-controller, 3100-inverter, 3200-charging and distribution unit, 3001-water inlet connector, 3002-water outlet connector, 3300-high-voltage distribution box, 3400-filter assembly, 4000-heat exchanger, 5000-oil pump, 6000-oil filter, 7000-connector assembly, 7100-low-voltage connector, 7200-high-voltage connector, 7300-AC slow charging connector, 7400-12V connector, 7500-PTC and ACP connector. DETAILED DESCRIPTION

[0039] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components in the actual implementation. The type, quantity and proportion of each component in the actual implementation can be a random change, and the component layout type may also be more complicated.

[0040] In addition, each embodiment of the following description has one or more technical features, but this does not mean that the user of the present invention must implement all the technical features in any embodiment at the same time, or can only implement part or all of the technical features in different embodiments separately. In other words, under the premise of being possible to implement, those skilled in the art can selectively implement part or all of the technical features in any embodiment according to the disclosure of the present invention and according to the design specifications or implementation requirements, or selectively implement a combination of part or all of the technical features in multiple embodiments, thereby increasing the flexibility of the implementation of the present invention.

[0041] As used in this specification, the singular forms "one", "an", and "the" include plural objects, and the plural form "a plurality" includes more than two objects, unless the content clearly indicates otherwise. As used in this specification, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise, and the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium, and it can be a connection between two elements or an interactive relationship between two elements. Relational terms such as the terms "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor do they indicate or imply relative importance or implicitly indicate the number of technical features indicated. It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The utility model aims to provide an electric drive system, which has the advantages of high integration, small size and light weight.

[0043] In order to make the purpose, advantages and features of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model. The same or similar reference numerals in the drawings represent the same or similar components.

[0044] Figures 1 to 6 , Fig.10 , Fig.11 1 shows a schematic structural diagram of the electric drive system 100, Figure 7 and Fig.12 A cross-sectional view of the electric drive system 100 is shown. Figures 1 to 7 , Figures 10 to 12The electric drive system 100 includes a first housing 1000, a power mechanism 2000 and a controller 3000. The first housing 1000 is a hollow structure having an inner cavity 1100. The power mechanism 2000 and the controller 3000 are both disposed in the inner cavity 1100, and the power mechanism includes a motor 2100 and a reduction box 2200, the reduction box 2200 is transmission-connected to the output end of the motor 2100, and the controller 3000 includes an inverter 3100, a charging and distribution unit 3200 and a high-voltage distribution box 3300.

[0045] Specifically, the inner cavity 1100 includes a first chamber 1110 and a second chamber 1120, and the first chamber 1110 and the second chamber 1120 are arranged along the third direction. The first chamber 1110 includes a first area 1111 and a second area 1112, and the second area 1112 includes a first sub-area 1112a and a second sub-area 1112b. The first area 1111 and the first sub-area 1112a are arranged along the second direction, the second sub-area 1112b and the first sub-area 1112a are also arranged along the second direction, and the first area 1111 and the second sub-area 1112b are also arranged along the first direction. The second chamber 1120 includes a third area 1121, a fourth area 1122 and a fifth area 1123. The third area 1121 and the fourth area 1122 are arranged along the first direction, and the fourth area 1122 and the fifth area 1123 are arranged along the second direction.

[0046] Here, the first direction, the second direction, and the third direction are perpendicular to each other. In the figure, the first direction is represented by a one-way arrow X, the second direction is represented by a one-way arrow Y, and the third direction is represented by a one-way arrow Z. The embodiment of the utility model has no special limitation on the specific directions of the first direction, the second direction and the third direction, as long as the above requirements are met. For example, in an optional embodiment, the third direction is a direction from bottom to top, the first direction is a direction from left to right, and the second direction is a direction from back to front, or, in an alternative embodiment, the third direction is a direction from top to bottom, the first direction is a direction from right to left, and the second direction is a direction from front to back, or, in another alternative embodiment, the third direction is a direction from top to bottom, the first direction is a direction from left to right, and the second direction is a direction from front to back, etc. For ease of understanding, the following text will be described as an example in which the third direction is from bottom to top, the first direction is from left to right, and the second direction is from back to front. However, technical personnel in this field should be able to modify the following description according to actual conditions to adapt to the situation where the first direction is not from bottom to top, or the first direction is not from left to right, or the second direction is not from back to front.

[0047] Thus, the first sub-region 1112a is in front of the first region 1111, and the second sub-region 1112b is on the right side of the first region 1111. The third region 1121 is directly above the first region 1111. The fourth region 1122 is on the right side of the third region 1121. A portion of the fourth region 1122 is directly above the right side of the first region 1111, another portion is directly above the second sub-region 1112b, and another portion is directly above the portion of the first sub-region 1112a that is adjacent to the second sub-region 1112b. The fifth region 1123 is in front of the fourth region 1122 and directly above the right portion of the first sub-region 1112a.

[0048] The motor 2100 is at least partially disposed in the first area 1111. The reduction box 2200 is at least partially disposed in the second area 1112. One of the inverter 3100 and the charging and distribution unit 3200 is disposed in the third area 1121, and the other is disposed in the fourth area 1122. The high-voltage distribution box 3300 is disposed in the sixth area 1123.

[0049] Thus, the relative positions of the various components of the power mechanism 2000 and the controller 3000 are as follows: a portion of the reduction box 2100 is located in front of the motor 2100, and another portion is located on the right side of the motor 2100. One of the inverter 3100 and the charging and distribution unit 3200 is located directly above the motor 2100, and the other is located on the upper right side of the motor 2100, and is partially located directly above the right side structure of the reduction box 2200. The high-voltage distribution box 3300 is located on the right side of the reduction box 1200 directly above the motor 2100.

[0050] The motor 2100, the reduction box 2200, the inverter 3100, the charging and distribution unit 3200, and the high-voltage distribution box 3300 are integrated in the first housing 1000, which greatly improves the integration of the electric drive system 100 and is also conducive to reducing the weight of the electric drive system 100. By rationally arranging the motor 2100, the reduction box 2200, the inverter 3100, the charging and distribution unit 3200, and the high-voltage distribution box 3300, the dimensions of the electric drive system 100 in the first direction, the second direction, and the third direction are optimized to reduce the volume of the electric drive system 100 as much as possible, thereby reducing the weight of the electric drive system 100.

[0051] It should be understood that in some embodiments, the output end of the motor 2100 partially extends to the second area 1112 and is connected to the reduction box 2200. That is, most of the structure of the motor 2100 is arranged in the first area 1111, and the part connected to the reduction box 2200 is located in the second area 1112, and the reduction box 2200 is entirely located in the second area 1112. Alternatively, the motor 2100 is entirely located in the first area 1111, and the input end of the reduction box 2200 extends to the first area 1111 and is connected to the motor 2100, that is, most of the structure of the reduction box 2200 is arranged in the second area 1112, and the part connected to the motor 2100 is located in the first area 1111. In some other implementations, the motor 2100 and the reduction gearbox 2200 are connected between the first area 1111 and the second area 1112 , that is, most of the structure of the motor 2100 is arranged in the first area 1111 , and most of the structure of the reduction gearbox 2200 is arranged in the second area 1112 .

[0052] The charging and distribution unit 3200 includes a DC / DC conversion module and an on-board charger module (not shown in the figure). The charging and distribution unit 3200 integrated with the DC / DC conversion module and the on-board charger module is a prior art, and its specific structure is well known to those skilled in the art and will not be repeated here. The use of the integrated charging and distribution unit 3200 not only improves the integration of the electric drive system 100, but also reduces the number of cables and the complexity of wiring, and is beneficial to the arrangement of other matching components when the electric drive system 100 is applied to a car. In addition, the inverter 3100 and the high-voltage distribution box 3300 are also conventional components, and their specific structures are well known to those skilled in the art.

[0053] It should be understood that the shape and size of the first area 1111 are compatible with the shape and size of the motor 2100. The shape and size of the second area 1112 are compatible with the shape and size of the reduction box 2200. When the inverter 3100 is arranged in the third area 1121 and the charging and distribution unit 3200 is arranged in the fourth area 1122, the shape and size of the third area 1121 are compatible with the shape and size of the inverter 3100, and the shape and size of the fourth area 1122 are compatible with the shape and size of the charging and distribution unit 3200; when the charging and distribution unit 3200 is arranged in the third area 1121 and the inverter 3100 is arranged in the fourth area 1122, the shape and size of the third area 1121 are compatible with the shape and size of the charging and distribution unit 3200, and the shape and size of the fourth area 1122 are compatible with the shape and size of the inverter 3100. The shape and size of the fifth area 1123 are compatible with the shape and size of the high-voltage distribution box 3300 .

[0054] In addition, if Figure 6 As shown, the controller 3000 further includes a filter assembly 3400. The filter assembly 3400 may be disposed at any suitable location, for example, in the second chamber 1120. Figure 5As shown, the second chamber 1120 also includes a sixth area 1124 for accommodating the filter assembly 3400. The sixth area 1124 is arranged at any suitable position of the second chamber 1120. For example, the third area 1121 and the sixth area 1124 are arranged along the second direction, so that the sixth area 1124 is located in front of the third area 1121. That is, from a vertical direction, the filter assembly 3400 is located directly above the left part of the reduction box 2200 in the first sub-area 1112a. From a horizontal direction, the filter assembly 3400 is located in front of the inverter 3100. It should be understood that the shape and size of the sixth area 1124 should be compatible with the shape and size of the filter assembly 3400. The specific structure of the filter assembly 3400 is well known to those skilled in the art and will not be repeated here.

[0055] Those skilled in the art know that the electric drive system is used in automobiles. When used, the high-voltage distribution box 3300 is electrically connected to the charging and distribution unit 3200 and the filter assembly 3400 through a third copper bar (not shown in the figure) and a fuse (not shown in the figure) to distribute power to the high-voltage system of the vehicle. The filter assembly 3400 is also connected to the inverter 3100 through a fourth copper bar (not shown in the figure) to improve the electromagnetic compatibility performance of the vehicle.

[0056] Next, other configurations of the electric drive system 100 are introduced with two specific embodiments.

[0057] <Example 1>

[0058] In this embodiment, please refer to Figures 6 to 8 , the inverter 3100 is arranged in the third area 1121, and the charging and distribution unit 3200 is arranged in the fourth area 1122. That is, the inverter 3100 is located directly above the motor 2100 and behind the reduction box 2200. Since the size of the inverter 3100 in the front-to-back direction is smaller than the size of the charging and distribution unit 3200 in the front-to-back direction, the size of the third area 1121 in the front-to-back direction is smaller than the size of the fourth area 1122 in the front-to-back direction, and the front of the fourth area 1121 protrudes from the front of the third area 1121. As a result, the sixth area 1124 and the fourth area 1121 are arranged from left to right, and the filter component 3400 is located on the left side of the charging and distribution unit 3200.

[0059] The electric drive system 100 also includes a high-voltage connection seat (not shown in the figure). The high-voltage connection seat is arranged in the inner cavity 1100, and is located on the side of the inverter 3100 away from the reduction box 2200, and is located at the boundary between the first chamber 1110 and the second chamber 1120. The high-voltage connection seat includes a fifth copper bar. The inverter 3100 includes a first copper bar (not shown in the figure). The cable of the first copper bar is connected from the side of the inverter 3100 away from the reduction box 2200, and is directly connected to the fifth copper bar of the high-voltage connection seat, and the optional connection method includes but is not limited to bolt connection. Those skilled in the art know that the motor 2000 also includes a second copper bar (not shown in the figure), and the cable of the second copper bar is connected from the side of the motor 2100 away from the reduction box 2200, and is directly connected to the fifth copper bar of the high-voltage connection seat, and the optional connection method includes but is not limited to bolt connection. In this way, the sum of the lengths of the first copper bar, the second copper bar and the fifth copper bar can be reduced, and the volume of the first housing 1000 located at the end of the motor 2100 away from the reduction box 2200 can be reduced, thereby reducing the weight of the electric drive system 100 and also reducing the size of the electric drive system 100 in the front-to-back direction. In practice, the first housing 1000 includes a housing body 1001, a motor rear end cover 1002 and a high-voltage cover plate 1003, and the housing body 1001 is provided with a connection hole, the connection hole is located at the rear end of the motor 2100, the motor rear end cover 1002 is connected to the connection hole, and the high-voltage cover plate 1003 is arranged on the motor rear end cover 1002. Therefore, the portion of the first housing 1000 located at the end of the motor 2100 away from the reduction box 2200 includes the motor rear end cover 1002 and the high-voltage cover plate 1003.

[0060] Those skilled in the art can understand that the electric drive system 100 further includes a cooling mechanism (not shown in the figure), which is used to cool some components of the electric drive system 100, such as the motor 2100, the reduction box 2200, the inverter 3100 and the charging and distribution unit 3200. In the embodiment of the utility model, the motor 2100 and the reduction box 2200 are cooled by oil cooling, and the inverter 3100 and the charging and distribution unit 3200 are cooled by water cooling.

[0061] Specifically, the reduction box 2200 includes a third housing, an internal gear shaft, a bearing, an oil pipe (not shown in the figure), and other components. The internal gear shaft, the bearing, and the oil pipe are all arranged in the third housing, and an oil spray hole is arranged on the oil pipe. During operation, a portion of the lubricating oil flowing through the oil pipe is sprayed from the oil spray hole to the internal gear shaft and the bearing to lubricate and cool the internal gear shaft and the bearing. The specific arrangement of the third housing, the internal gear shaft, the bearing, the oil pipe, and other components is well known to those skilled in the art and will not be described in detail here.

[0062] The electric drive system 100 further includes a heat exchanger 4000, which is disposed outside the first housing 1000 and connected to the first housing 1000. The heat exchanger 4000 may be disposed on the left side of the motor 2100. The heat exchanger 4000 has a first heat exchange inlet end and a first heat exchange outlet end that are interconnected. The first heat exchange inlet end is in communication with the outlet end of the oil pipe. The first housing 1000 is also provided with a first oil passage and a second oil passage (not shown in the figure) in parallel, and the inlet ends of the first oil passage and the second oil passage are both in communication with the first heat exchange outlet end. The outlet end of the first oil passage and the outlet end of the second oil passage are both in communication with the first chamber 1110, and the outlet end of the first oil passage is arranged corresponding to the stator (not shown in the figure) of the motor 2100, and the outlet end of the second oil passage is arranged corresponding to the rotor (not shown in the figure) of the motor. Another part of the lubricating oil flowing through the oil pipe can flow into the heat exchanger 4000, and after heat exchange and cooling in the heat exchanger 4000, it is divided into two paths, one path entering the first oil channel, and the other path entering the second oil channel. The lubricating oil entering the first oil channel flows from the outlet end of the first oil channel to the stator (not shown in the figure) to cool the iron core and winding of the stator. The lubricating oil entering the second oil channel flows from the outlet end of the second oil channel to the rotor to cool the rotor core and magnetic steel of the rotor.

[0063] It is understandable that Figure 2As shown, the electric drive system 100 also includes an oil pump 5000 and an oil filter 6000, which are arranged on the first housing 1000, and the oil pump 5000 and the oil filter 6000 are located on the right side of the motor 2100 and behind the reduction box 2200. The outlet end of the oil pump 5000, the oil filter 6000 and the inlet end of the oil pipe are connected in sequence. An oil return groove (not shown in the figure) is also formed on the first housing 1000, and the oil return groove is connected to the first chamber 1110 and is used to receive the lubricating oil of the stator and rotor of the motor 2100 flowing through the motor 2100. The oil return groove is also connected to the inlet end of the oil pump 4000 so that the lubricating oil in the oil return groove can enter the oil pump 4000.

[0064] In this way, the flow path of the lubricating oil is as follows: the oil pump 4000 pumps the lubricating oil in the oil return tank into the oil filter 5000 for filtering; the filtered lubricating oil enters the oil pipe, and a part of the lubricating oil is sprayed from the oil spray hole of the oil pipe to the internal gear shaft and the bearing of the reduction box 2200 to lubricate and cool the internal gear shaft and the bearing, and then flows back to the oil return tank. Another part of the lubricating oil flows through the oil pipe and enters the heat exchanger 6000 from the first heat exchange inlet end for heat exchange, and a part of the lubricating oil after heat exchange enters the first oil channel and the other part enters the second oil channel. The lubricating oil entering the first oil channel flows from the outlet end of the first oil channel to the stator of the motor 2100 to cool the stator of the motor 2100, and then flows back to the oil return tank. The lubricating oil entering the second oil passage flows from the outlet end of the second oil passage to the rotor of the motor 2100 to cool the rotor of the motor 2100 , and then flows back to the oil return tank.

[0065] It should be understood that the high-voltage connection socket is sealed to the first shell 1000 to prevent lubricating oil used to lubricate and cool the motor 2100 from entering the second chamber 1120 from the location of the high-voltage connection socket and interfering with the controller 3000.

[0066] The charging and distribution unit 3200 also includes a second shell (not marked in the figure), which encloses the DC / DC conversion module and the on-board charger module. The second shell is provided with a first cooling water flow channel, and the inlet end of the first cooling water flow channel is also provided with a water inlet connector 3001 ((such as Figure 2As shown in the figure), the water inlet joint 3001 is connected to the outside of the first shell 1000. The inverter 3100 includes a water-cooled plate (not shown in the figure), and a second cooling water channel is provided on the water-cooled plate. The inlet end of the second cooling water channel is connected to the outlet end of the first cooling water channel, and the outlet end of the second cooling water channel is connected to the outside of the first shell 1000. The cooling water enters the first cooling water channel through the water inlet joint 3001 and circulates in the first cooling water channel to cool the charging and distribution unit 3200. Then, the cooling water flows into the second cooling water channel and circulates in the second cooling water channel to cool the inverter 3100, and is finally discharged. Figure 8 The arrow S indicates the flow direction of the cooling water.

[0067] Those skilled in the art know that the inlet end of the first cooling water channel is located at the lower side of the charging and distribution unit 3200. Figure 7 It can be seen that the water inlet joint 3100 passes through the first shell 1000 at the bottom of the second area 1122 and extends to the outside of the first shell 1000. Figure 8 It can be seen that the inlet end of the second cooling water channel is located on the right side of the water-cooling plate, and the outlet end of the second cooling water channel is located on the left side of the water-cooling plate, which is conducive to minimizing the vertical size of the electric drive system 100, thereby making the electric drive system 100 particularly suitable for rear-wheel drive axles with higher vertical size requirements.

[0068] It should be noted that the inverter 3200 also includes a capacitor, a power module, a support plate and a printed circuit board (not shown in the figure). The capacitor, the water-cooled plate, the power module, the support plate and the printed circuit board are arranged in sequence from the bottom right to the top. In this way, the cooling water flowing through the second cooling water channel can cool the capacitor and the power module at the same time, and has a good cooling effect.

[0069] Optionally, the heat exchanger 6000 further has a second heat exchange inlet and a second heat exchange outlet that are connected to each other. The outlet of the second cooling water channel is connected to the second heat exchange inlet by any suitable means, and the second heat exchange outlet is provided with a water outlet connector 3002, which is connected to the outside of the first shell 1000.

[0070] Alternatively, if Fig. 9 As shown, the electric drive system further includes a connector assembly 7000. The connector assembly 7000 is disposed on the first housing 1000 and is located on a side of the reduction box 2200 away from the motor 2100.

[0071] Optionally, the connector assembly 7000 includes at least one of a low-voltage connector 7100, a high-voltage connector 7200, an AC slow-charge connector 7300, a 12V connector 7400, a PTC and an ACP connector 7500. The functions of each of the connectors are well known to those skilled in the art. When assembling the electric drive system 1000, each of the connectors can be connected to the relevant components of the controller 3000 with reference to the prior art. For example, the low-voltage connector 7100 is connected to the printed circuit board of the inverter 3100. When an external device is plugged into the low-voltage connector 7100, the external device can obtain information such as the torque and speed of the motor 2100. The high-voltage connector 7200 is connected to the filter assembly and the power module of the inverter 3100, and the high-voltage connector 7200 is also used to connect to an external power supply so that the external power supply can power the filter assembly and the power module. The AC slow charge connector 7300 is connected to the charging and distribution unit 3200, and serves as an AC slow charge port for connecting to an external AC charging pile. The 12V connector 7400 is connected to the charging and distribution unit 3200, and is also used to connect to an external 12V battery to charge the 12V battery. The PTC and ACP connector 7500 is connected to the high-voltage distribution box 3300, and is connected to an external heating device and an air-conditioning compressor to power the heating device and the air-conditioning compressor.

[0072] The specific structures of the low-voltage connector 7100, the high-voltage connector 7200, the AC slow charging connector 7300, the 12V connector 7400, and the PTC and ACP connector 7500 are well known in the art and will not be described in detail here.

[0073] <Example 2>

[0074] like Figures 10 to 12 As shown, one of the differences between this embodiment and the first embodiment is that the charging and distribution unit 3200 is arranged in the third area 1121, and the inverter 3100 is arranged in the third area 1121. Thus, the size of the third area 1121 in the front-to-back direction is larger than the size of the fourth area 1122 in the front-to-back direction, and the front of the third area 1121 protrudes from the front of the fourth area 1122. Accordingly, the sixth area (( Fig.10 ) and the fifth region 1123 are arranged from left to right. In this way, the filter component ( Fig.11 The high voltage distribution box 3300 is located on the left side of the high voltage distribution box 3300. This arrangement can reduce the size of the electric drive system 1000 in the left-right direction.

[0075] Those skilled in the art know that the inlet and outlet of the first cooling water channel are both located at the bottom of the charging and distribution unit 3200. To match the structure of the charging and distribution unit 3200, compared with the first embodiment, the depth of the first area 1111 in this embodiment is greater, so that the electric drive system 100 provided in this embodiment has a larger size in the vertical direction.

[0076] The second difference between this embodiment and the first embodiment is that the high-voltage connection seat is sealed on the rear end cover 1002 of the motor. The first copper bar of the inverter 3100 is connected to the fifth copper bar of the high-voltage connection seat through a transfer copper bar, while the second copper bar of the motor 2100 needs to be indirectly connected to the fifth copper bar of the high-voltage connection seat through a high-voltage connecting line. This arrangement will increase the size of the rear end cover 1002 of the motor in the front-to-back direction, and cause the overall profile of the rear end cover 1002 of the motor to increase, which will inevitably lead to an increase in its volume and weight. Correspondingly, the overall profile, volume, and weight of the high-voltage cover plate 1003 are also increased. This results in an increase in the weight of the electric drive system 100, and also increases the size of the electric drive system 100 in the front-to-back direction.

[0077] Although the utility model is disclosed as above, it is not limited thereto. Those skilled in the art may make various modifications and variations to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. Electric drive system, characterized in that: include: A first shell has an inner cavity, the inner cavity includes a first cavity and a second cavity arranged along a third direction; the first cavity includes a first area and a second area, the second area includes a second sub-area and a first sub-area arranged along the second direction; the first area and the second sub-area are arranged along the first direction, and the first area and the first sub-area are also arranged along the second direction; the second cavity includes a third area, a fourth area and a fifth area, the third area and the fourth area are arranged along the first direction, and the fourth area and the fifth area are arranged along the second direction; the first direction, the second direction and the third direction are perpendicular to each other; A power mechanism, comprising a motor and a reduction box; the motor is at least partially disposed in the first area, and the reduction box is at least partially disposed in the second area and connected to an output end of the motor; as well as, The controller includes an inverter, a charging and distribution unit and a high-voltage distribution box; one of the inverter and the charging and distribution unit is arranged in the third area, and the other is arranged in the fourth area; the high-voltage distribution box is arranged in the fifth area.

2. The electric drive system according to claim 1, characterized in that: The second chamber further includes a sixth area, the third area and the sixth area are arranged along the second direction; the sixth area is also arranged along the first direction with the fourth area, or the sixth area is also arranged along the first direction with the fifth area; The controller further includes a filter component, and the filter component is disposed in the sixth area.

3. The electric drive system according to claim 1, characterized in that: The inverter is arranged in the third area, and the inverter comprises a first copper bar; the cable of the first copper bar is located on a side of the inverter away from the reduction box; the motor comprises a second copper bar, the second copper bar is connected to the stator of the motor, and the cable of the second copper bar is located on a side of the motor away from the reduction box; The electric drive system includes a high-voltage connection socket, which is sealed and connected to the first shell and is located on the side of the inverter away from the reduction gearbox. The high-voltage connection socket is arranged in the inner cavity and is located at the boundary between the first chamber and the second chamber; the high-voltage connection socket is respectively connected to the cables of the first copper busbar and the cables of the second copper busbar.

4. The electric drive system according to claim 1, characterized in that: The reduction box includes an oil pipe; the electric drive system also includes a heat exchanger, which is arranged outside the first shell and connected to the first shell; the heat exchanger has a first heat exchange inlet end and a first heat exchange outlet end which are interconnected, and the first heat exchange inlet end is connected to the outlet end of the oil pipe; The first shell is provided with a first oil channel and a second oil channel in parallel; the inlet end of the first oil channel and the inlet end of the second oil channel are both connected to the first heat exchange outlet end; the outlet end of the first oil channel is connected to the first chamber and is arranged corresponding to the stator of the motor; the outlet end of the second oil channel is connected to the first chamber and is arranged corresponding to the rotor of the motor.

5. The electric drive system according to claim 4, characterized in that: The electric drive system further includes an oil pump and an oil filter, both of which are disposed in the inner cavity; the outlet end of the oil pump, the oil filter and the inlet end of the oil pipe are connected in sequence; An oil return groove is also formed on the first housing; the oil return groove is communicated with the first chamber and is used to receive the oil flowing through the stator and rotor of the motor, and the oil return groove is also communicated with the inlet end of the oil pump.

6. The electric drive system according to claim 1, characterized in that: The charging and distribution unit includes a second shell, on which a first cooling water channel is provided; the inverter includes a water-cooling plate, on which a second cooling water channel is provided, and an inlet end of the second cooling water channel is connected to an outlet end of the first cooling water channel.

7. The electric drive system according to claim 6, characterized in that: The electric drive system further includes a heat exchanger, which is disposed outside the first shell and connected to the first shell; the heat exchanger has a second heat exchange inlet end and a second heat exchange outlet end that are connected to each other; the second heat exchange outlet end of the heat exchanger is connected to the outside of the first shell; The outlet end of the second cooling water flow channel is communicated with the second heat exchange inlet end of the heat exchanger.

8. The electric drive system according to claim 1, characterized in that: The electric drive system includes a connector assembly, which is arranged on the first housing and located on a side of the reduction box away from the motor.

9. The electric drive system according to claim 8, characterized in that: The connector assembly includes at least one of a low voltage connector, a high voltage connector, an AC slow charge connector, a 12V connector, a PTC and an ACP connector.

10. The electric drive system according to claim 1, characterized in that: The charging and distribution unit includes a DC / DC conversion module and an on-board charger module.

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