Electric drive system and vehicle

Abstract

The invention discloses an electric drive system and a vehicle, and belongs to the technical field of electric drive systems. The electric drive system has a first direction, a second direction and a third direction which are intersected pairwise. The electric drive system comprises an electric drive transmission assembly and a controller assembly, and the electric drive transmission assembly and the controller assembly are stacked in the third direction. The controller assembly comprises a first shell and a plurality of control modules, the first shell is provided with a first containing cavity used for containing the control modules, and the control modules are distributed in a flat laying mode in a plane defined by the first direction and the second direction so that the size of the controller assembly in the third direction can be reduced. According to the electric drive system, the size of the electric drive system in the third direction can be reduced, the electric drive system can be arranged at the front drive position and / or the rear drive position of the vehicle, the vehicle model adaptation range is expanded, and therefore the universality of the electric drive system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric drive systems, and in particular to an electric drive system and a vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, consumers have higher requirements for the power performance, space utilization and endurance of vehicles. As the core power component of new energy vehicles, the structural design of the electric drive system directly affects the overall performance and layout flexibility of the vehicle.

[0003] In related technologies, the height dimension of the electric drive system is large, and the electric drive system can usually only be adapted to the front drive position with sufficient height space, and it is difficult to adapt to the rear drive position with tight height space. This limits the application model range of the electric drive system, reduces the universality of the electric drive system, and thus prolongs the production cycle of the vehicle and increases the production cost. SUMMARY

[0004] The embodiments of the present application provide an electric drive system and a vehicle, which can reduce the size of the electric drive system in the third direction, and the electric drive system can be arranged in the front drive position and / or the rear drive position of the vehicle, thereby expanding the model adaptation range and improving the universality of the electric drive system.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, an electric drive system is provided, the electric drive system has a first direction, a second direction and a third direction intersecting with each other, and the electric drive system comprises: an electric drive transmission assembly and a controller assembly, the electric drive transmission assembly and the controller assembly are arranged in a stacked manner along the third direction. Among them, the controller assembly comprises a first shell and a plurality of control modules, the first shell has a first accommodating cavity for accommodating a plurality of control modules, and a plurality of control modules are arranged in a tiled manner in a plane defined by the first direction and the second direction, so as to reduce the size of the controller assembly in the third direction.

[0006] Optionally, the electric drive transmission assembly comprises a motor assembly and a reducer assembly, and the motor assembly and the reducer assembly are arranged in a distributed manner along the second direction.

[0007] Optionally, the electric drive system further comprises a cooling assembly, the cooling assembly comprises an oil circuit, at least one of the motor assembly and the reducer assembly is provided with an oil circuit, and the oil circuit is used for conveying lubricating oil. The cooling assembly further comprises a water circuit, at least one of the controller assembly, the motor assembly and the reducer assembly is provided with a water circuit, and the water circuit is used for conveying cooling liquid.

[0008] Optionally, the cooling assembly further comprises an inlet water pipe and an outlet water pipe, the inlet water pipe is connected with the water inlet end of the water channel; The electric drive transmission assembly further comprises a heat exchanger, the heat exchanger has an oil inlet, an oil outlet, a water inlet and a water outlet; The oil inlet is communicated with the oil outlet end of the oil channel, the oil outlet is communicated with the oil inlet end of the oil channel, the water inlet is communicated with the water outlet end of the water channel, and the water outlet is communicated with the outlet water pipe.

[0009] Optionally, the heat exchanger is arranged on one side of the reducer assembly in the first direction, the oil inlet, the oil outlet, the water inlet and the water outlet are arranged on the side of the heat exchanger facing the reducer assembly, and the oil outlet end of the oil channel, the oil inlet end of the oil channel, the water outlet end of the water channel and the outlet water pipe are arranged on the reducer assembly. The projection of the heat exchanger along the third direction is located in the range of the projection of the controller assembly along the third direction.

[0010] Optionally, the motor assembly comprises a second housing, the reducer assembly comprises a third housing, the inlet water pipe is arranged in the first housing, the outlet water pipe is arranged in the third housing, the first housing, the second housing and the third housing are provided with the water channel, and the second housing and the third housing are provided with the oil channel.

[0011] Optionally, the electric drive transmission assembly further comprises an electronic oil pump, the electronic oil pump is arranged on the reducer assembly, the electronic oil pump is connected with the oil channel, and the electronic oil pump is used to drive the lubricating oil to flow; The electric drive transmission assembly further comprises a filter, the filter is arranged on the reducer assembly, the filter is connected with the oil channel, and the filter is used to filter the lubricating oil; The electronic oil pump and the filter are arranged side by side on one end of the reducer assembly close to the motor assembly in the second direction.

[0012] Optionally, the size of the electric drive system in the third direction is H, and the following is met: 310mm≤H≤320mm; and / or, The size of the electric drive system in the first direction is W, and the following is met: 430mm≤W≤455mm.

[0013] Optionally, the plurality of control modules comprise a motor controller, an on-board charger, a direct current converter, a vehicle controller and a high-voltage distribution box, the controller assembly further comprises a plurality of interfaces, and the plurality of interfaces comprise a busbar interface, a slow charging interface, a direct current interface, a low-voltage wire harness interface and a fast charging interface. The bus interface is connected with the motor controller, the slow charging interface is connected with the on-board charger, the DC interface is connected with the DC converter, the low-voltage wire harness interface is connected with the motor controller and the vehicle controller respectively, and the fast charging interface is connected with the high-voltage distribution box.

[0014] According to a second aspect of the present application, a vehicle is provided, comprising the electric drive system as claimed in any one of the above.

[0015] In the electric drive system and the vehicle of the embodiments of the present application, the multiple control modules are arranged in a tiled manner in the plane defined by the first direction and the second direction, so that the size of the electric drive system in the third direction can be reduced, the electric drive system can be arranged at the front drive position and / or the rear drive position of the vehicle, the model adaptation range is expanded, the versatility of the electric drive system is improved, and the production cycle of the vehicle is shortened and the production cost is reduced.

[0016] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0019] Figure 1 is a perspective structural schematic view of one view of the electric drive system provided in the exemplary embodiment of the present disclosure; Figure 2 is another perspective structural schematic view of the electric drive system provided in the exemplary embodiment of the present disclosure; Figure 3 is a perspective structural schematic view of part of the electric drive system provided in the exemplary embodiment of the present disclosure; Figure 4 is an exploded structural schematic view of the electric drive system provided in the exemplary embodiment of the present disclosure; Figure 5 is a planar structural schematic view of the electric drive system provided in the exemplary embodiment of the present disclosure; Figure 6is a planar structural schematic diagram of one perspective of the electric drive transmission assembly provided in the exemplary embodiments of the present disclosure; Figure 7 is a planar structural schematic diagram of another perspective of the electric drive transmission assembly provided in the exemplary embodiments of the present disclosure; Figure 8 is Figure 7 is an enlarged schematic diagram of part A in Figure 9 is a three-dimensional structural schematic diagram of the heat exchanger provided in the exemplary embodiments of the present disclosure.

[0020] Explanation of reference numerals: 1, electric drive transmission assembly; 11, motor assembly; 111, second housing; 12, speed reducer assembly; 121, third housing; 13, heat exchanger; 131, oil inlet; 132, oil outlet; 133, water inlet; 134, water outlet; 14, electronic oil pump; 15, filter; 2, controller assembly; 21, first housing; 211, first accommodating cavity; 22, control module; 221, motor controller; 222, on-board charger; 223, DC converter; 224, vehicle controller; 225, high-voltage distribution box; 23, interface; 231, busbar interface; 232, slow charging interface; 233, DC interface; 234, low-voltage wire harness interface; 235, fast charging interface; 3, cooling assembly; 31, oil circuit; 311, oil inlet end; 312, oil outlet end; 32, water circuit; 321, water inlet end; 322, water outlet end; 33, water inlet pipe; 34, water outlet pipe; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper", "lower", "left", "right" generally refer to the upper, lower, left and right of the device in the actual use or working state, and specifically refer to the direction of the drawing surface in the drawings.

[0022] In the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "stacked" and the like should be interpreted broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be directly connected, or indirectly connected through an intermediate medium; can be internal connection of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] The present application provides an electric drive system and a vehicle, which are described in detail below respectively. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application. Moreover, in the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0024] According to the first aspect of the present application, referring to Figure 1 and Figure 2 , an embodiment of the present application provides an electric drive system, which has a first direction X, a second direction Y and a third direction Z intersecting with each other. In the embodiment, the first direction X, the second direction Y and the third direction Z can be perpendicular to each other. The first direction X is the width direction of the electric drive system, corresponding to the width direction of the vehicle, the second direction Y is the length direction of the electric drive system, corresponding to the length direction of the vehicle, and the third direction Z is the height direction of the electric drive system, corresponding to the height direction of the vehicle.

[0025] Referring to Figure 1 and Figure 2 , the electric drive system can include an electric drive transmission assembly 1 and a controller assembly 2, and the electric drive transmission assembly 1 and the controller assembly 2 are stacked along the third direction Z, i.e. the controller assembly 2 is located above the electric drive transmission assembly 1.

[0026] Referring to Figure 3 and Figure 4 , the controller assembly 2 can include a first housing 21 and a plurality of control modules 22. The first housing 21 can be made of aluminum alloy or other materials, which has the characteristics of light weight, high strength and good heat dissipation performance. The first housing 21 can have a first accommodating cavity 211 for accommodating the plurality of control modules 22, and the shape of the first accommodating cavity 211 can be adapted to the overall layout of the control modules 22 to ensure stable installation of the control modules 22.

[0027] Referring to Figure 3, the plurality of control modules 22 can be distributed in a tiled manner in a plane defined by the first direction X and the second direction Y, so as to reduce the size of the controller assembly 2 in the third direction Z. Compared with the stacked arrangement of the plurality of control modules 22 in the third direction Z, the tiled arrangement of the plurality of control modules 22 in the plane defined by the first direction X and the second direction Y in the present application can reduce the size of the controller assembly 2 in the third direction Z, thereby reducing the height of the electric drive system in the third direction Z.

[0028] In some embodiments, referring to Figure 3 and Figure 4 , the plurality of control modules 22 includes a motor controller 221, an on-board charger 222, a DC converter 223, a vehicle controller 224, and a high-voltage distribution box 225. As an example, the motor controller 221 can be connected with the motor assembly 11, and the motor controller 221 is used to control the operating state of the motor assembly 11, such as controlling the motor assembly 11 to start, accelerate, decelerate, and stop, etc. The vehicle controller 224 is used as the control core of the vehicle, and is used to coordinate the operation of each system. The motor controller 221 and the vehicle controller 224 can communicate with other control systems of the vehicle through a low-voltage wire harness interface 234. The on-board charger 222 is used to convert the power of an alternating current power grid into direct current power to charge the battery, and the on-board charger 222 can be arranged close to the slow charging interface 232 to shorten the length of the line connection. The DC converter 223 is used to convert the high-voltage direct current power of the battery into low-voltage direct current power to supply power to the low-voltage electrical equipment of the vehicle, and the DC converter 223 can realize power output through a DC interface 233. The high-voltage distribution box 225 is used to realize the distribution and protection of high-voltage power, and to ensure the safe distribution of power during fast charging, and the high-voltage distribution box 225 can be arranged close to the fast charging interface 235.

[0029] Referring to Figure 3 and Figure 4 , the motor controller 221 and the vehicle controller 224 can share a circuit board, which can reduce the occupied space of the motor controller 221 and the vehicle controller 224. The on-board charger 222 and the DC converter 223 can be integrated into a two-in-one power supply, which can reduce the occupied space of the on-board charger 222 and the DC converter 223. In this way, the overall size of the controller assembly 2 can be reduced, thereby reducing the overall size of the electric drive system.

[0030] Referring to Figure 1 , Figure 3 and Figure 5 , the controller assembly 2 can further include a plurality of interfaces 23, which can be arranged on the side of the first housing 21 to facilitate connection with external devices. The plurality of interfaces 23 can include a busbar interface 231, a slow charging interface 232, a DC interface 233, a low-voltage wire harness interface 234, and a fast charging interface 235.

[0031] The bus interface 231 can be connected with the motor controller 221, and the motor controller 221 can be connected with the battery through the bus interface 231, so as to deliver the electric energy of the battery to the motor assembly 11. The slow charging interface 232 can be connected with the on-board charger 222, for connecting an external alternating current charging device to realize slow charging function. The direct current interface 233 can be connected with the direct current converter 223, for outputting low-voltage direct current to supply power to low-voltage electrical equipment of the vehicle. The low-voltage wire harness interface 234 can be connected with the motor controller 221 and the vehicle control unit 224 respectively, for realizing signal transmission between the vehicle control unit 224 and the motor controller 221 and other control systems of the vehicle. The fast charging interface 235 can be connected with the high-voltage distribution box 225, for connecting an external direct current charging device to realize fast charging function.

[0032] In the present application, by arranging the plurality of control modules 22 in a tiled manner in the plane defined by the first direction X and the second direction Y, the size of the electric drive system in the third direction Z can be reduced, and the electric drive system can be arranged at the front drive position and / or the rear drive position of the vehicle, thereby expanding the vehicle model adaptation range, improving the versatility of the electric drive system, and shortening the production cycle and reducing the production cost of the vehicle. At the same time, the installation space of the electric drive system in the vehicle is reduced, thereby increasing the seating space and storage space of the vehicle.

[0033] In some embodiments, referring to Figure 1 and Figure 2 The electric drive transmission assembly 1 is the core component of the electric drive system for realizing power transmission, and can include the motor assembly 11 and the speed reducer assembly 12. The motor assembly 11 is the power source of the electric drive system, and the speed reducer assembly 12 is used to reduce the output speed of the motor assembly 11 and improve the output torque to meet the driving requirements of the vehicle. The motor assembly 11 and the speed reducer assembly 12 can be arranged along the second direction Y, i.e., the motor assembly 11 and the speed reducer assembly 12 are arranged along the length direction of the vehicle, which facilitates power transmission, reduces power loss, and facilitates interfacing with the transmission system of the vehicle, while reducing the size of the electric drive system in the first direction X.

[0034] As an example, the motor assembly 11 can include a second housing 111, a stator (not shown), a rotor (not shown), an output shaft (not shown), and the like. The second housing 111 can be made of aluminum alloy or the like, and the inside of the second housing 111 can be provided with a stator mounting seat and a bearing mounting hole to ensure stable installation of the stator and the rotor. The reducer assembly 12 can include a third housing 121, a gear set (not shown), an input shaft (not shown), and an output shaft (not shown), and the like. The output shaft of the motor assembly 11 and the input shaft of the reducer assembly 12 can be connected by a shaft coupling (not shown) to achieve power transmission. The third housing 121 can be made of aluminum alloy or the like, and the third housing 121 and the second housing 111 can be fixedly connected by bolts, and the connecting surface can be provided with a sealing gasket (not shown) to ensure sealing performance and prevent lubricating oil from leaking. The gear set adopts a helical gear design, which has the characteristics of stable transmission, low noise, and strong carrying capacity, and can improve the power transmission efficiency and service life. In some embodiments, the controller assembly 2, the motor assembly 11, and the reducer assembly 12 can be independent components, and the corresponding first housing 21, the second housing 111, and the third housing 121 can be provided with mounting holes, and the three can be fixedly connected as a whole by bolts.

[0035] Referring to Figure 1 and Figure 6 In some embodiments, the electric drive system can further include a cooling assembly 3, which can cool the electric drive system to ensure that each component operates within a reasonable temperature range and improves the operation stability and service life of the electric drive system.

[0036] The cooling assembly 3 can include an oil circuit 31 for conveying lubricating oil, which not only has lubricating and cleaning effects, but also has a cooling effect, thereby ensuring stable operation of each component. At least one of the motor assembly 11 and the reducer assembly 12 is provided with an oil circuit 31. In this embodiment, the motor assembly 11 and the reducer assembly 12 are both provided with an oil circuit 31. The oil circuit 31 on the motor assembly 11 and the oil circuit 31 on the reducer assembly 12 can be in communication with each other. Lubricating oil can flow into the inside of the motor assembly 11 and the reducer assembly 12 through the oil circuit 31 to lubricate, clean, and cool the motor assembly 11 and the reducer assembly 12.

[0037] The cooling assembly 3 can also include a water circuit 32 for conveying cooling liquid, which can carry away heat generated during operation of the electric drive system, thereby ensuring stable operation of the electric drive system. At least one of the controller assembly 2, the motor assembly 11, and the reducer assembly 12 is provided with a water circuit 32. In this embodiment, the controller assembly 2, the motor assembly 11, and the reducer assembly 12 are all provided with a water circuit 32. The water circuit 32 on the controller assembly 2, the water circuit 32 on the motor assembly 11, and the water circuit 32 on the reducer assembly 12 can be in communication with each other.

[0038] In some embodiments, referring to Figure 2 and Figure 6 to Figure 8 , the cooling assembly 3 can further include an inlet pipe 33 and an outlet pipe 34 for realizing the input and output of the cooling liquid respectively, ensuring the circulation operation of the cooling system. The inlet pipe 33 can be connected with the inlet end 321 of the water channel 32.

[0039] As an example, referring to Figure 2 , Figure 6 and Figure 8 , the inlet pipe 33 can be arranged in the first housing 21, and the outlet pipe 34 can be arranged in the third housing 121. The first housing 21, the second housing 111 and the third housing 121 can all be provided with the water channel 32, through which the cooling liquid can flow through the heating areas of the components to realize cooling. The water channel 32 can be integrally formed with the first housing 21, the second housing 111 and the third housing 121 respectively, which can reduce the occupied space of the water channel 32, thereby reducing the overall size of the electric drive system. In some embodiments, the water channel 32 can adopt a high-pressure water pipe, which has the characteristics of high-pressure resistance, corrosion resistance and high-temperature resistance. The water channel 32 is independent of the oil channel 31, avoiding mutual interference.

[0040] The second housing 111 and the third housing 121 can both be provided with the oil channel 31. The lubricating oil can flow through the stator, rotor of the motor assembly 11 and gear set of the reducer assembly 12, etc. through the oil channel 31 to realize lubrication and cooling. The oil channel 31 can be integrally formed with the second housing 111 and the third housing 121 respectively, which can reduce the occupied space of the oil channel 31, thereby reducing the overall size of the electric drive system. In some embodiments, the oil channel 31 can adopt a high-pressure oil pipe, which has the characteristics of high-pressure resistance, oil resistance and high-temperature resistance.

[0041] The oil channel 31 and the water channel 32 are integrally formed with the housings, without the need for additional pipes. This not only simplifies the overall structure, reduces the number of components, reduces the weight and manufacturing cost of the electric drive system, but also improves the space utilization, making the structure of the electric drive system more compact, thereby reducing the size of the electric drive system.

[0042] Referring to Figure 2 and Figure 8 , the oil channel 31 can include an oil inlet end 311 and an oil outlet end 312, and the water channel 32 can include a water inlet end 321 and a water outlet end 322. Referring to Figure 1 and Figure 9The electric drive assembly 1 can further include a heat exchanger 13, which can have an oil inlet 131, an oil outlet 132, a water inlet 133, and a water outlet 134. The oil inlet 131 can be in communication with the oil outlet end 312 of the oil passage 31, and the oil outlet 132 can be in communication with the oil inlet end 311 of the oil passage 31. The water inlet 133 can be in communication with the water outlet end 322 of the water passage 32, and the water outlet 134 can be in communication with the water outlet pipe 34.

[0043] The high-temperature lubricating oil in the oil passage 31 can flow into the heat exchanger 13 through the oil inlet 131, and the low-temperature cooling liquid in the water passage 32 can flow into the heat exchanger 13 through the water inlet 133. The high-temperature lubricating oil and the low-temperature cooling liquid can exchange heat in the heat exchanger 13, so that the heat of the lubricating oil is transferred to the cooling liquid, achieving cooling of the lubricating oil. The cooled lubricating oil can flow into the oil passage 31 through the oil outlet 132, and then flow into the interiors of the motor assembly 11 and the reducer assembly 12 through the oil passage 31, to lubricate, clean, and cool the motor assembly 11 and the reducer assembly 12. The heated cooling liquid can flow into the water outlet pipe 34 through the water outlet 134, and then flow into the radiator (not shown) of the vehicle through the water outlet pipe 34, so that the radiator can cool the cooling liquid.

[0044] For example, the cooling liquid enters the water inlet end 321 of the water passage 32 from the radiator of the vehicle through the water inlet pipe 33, sequentially flows through the water passage 32 in the controller assembly 2, the motor assembly 11, and the reducer assembly 12, and absorbs part of the heat, and then the cooling liquid flows out from the water outlet end 322 and enters the heat exchanger 13 through the water inlet 133. After heat exchange with the lubricating oil in the heat exchanger 13, the cooling liquid with increased temperature flows back to the radiator of the vehicle through the water outlet pipe 34 for cooling, completing a cycle.

[0045] In some embodiments, with reference to Figure 1 The heat exchanger 13 can have a flat structure as a whole, which has the characteristics of small volume, large heat dissipation area, and high heat exchange efficiency. The heat exchanger 13 can be arranged on one side of the reducer assembly 12 in the first direction X, i.e., the heat exchanger 13 can be arranged on the side surface of the third housing 121 of the reducer assembly 12 in the first direction X. In this way, the size of the heat exchanger 13 in the first direction X can be reduced, thereby reducing the size of the electric drive system in the first direction X.

[0046] With reference to Figure 8 and Figure 9The oil inlet 131, the oil outlet 132, the water inlet 133, and the water outlet 134 can be arranged on the side of the heat exchanger 13 facing the reducer assembly 12, and the oil outlet end 312 of the oil circuit 31, the oil inlet end 311 of the oil circuit 31, the water outlet end 322 of the water circuit 32, and the water outlet pipe 34 can be correspondingly arranged on the third housing 121 of the reducer assembly 12. In this way, the heat exchanger 13 is connected to the cooling assembly 3, the length of the connection path is shortened, and the energy loss and the risk of leakage are reduced.

[0047] The projection of the heat exchanger 13 along the third direction Z is located within the projection of the controller assembly 2 along the third direction Z, i.e., the projection of the heat exchanger 13 on the plane defined by the first direction X and the second direction Y is located within the projection of the controller assembly 2 on the plane defined by the first direction X and the second direction Y. In this way, the heat exchanger 13 does not exceed the profile of the controller assembly 2 in the first direction X, further reducing the size of the electric drive system in the first direction X, and making the structure of the electric drive system more compact.

[0048] In the present application, the cooling assembly 3 adopts a double-cooling system combining the oil circuit 31 and the water circuit 32. The oil circuit 31 is used for lubricating, cleaning, and cooling the motor assembly 11 and the reducer assembly 12, and the water circuit 32 is used for providing cooling liquid to cool the controller assembly 2, the motor assembly 11, and the reducer assembly 12, and cooling the lubricating oil, thereby achieving comprehensive cooling of the core components of the electric drive system. The oil inlet 131, the oil outlet 132, the water inlet 133, and the water outlet 134 of the heat exchanger 13 are arranged on the side facing the reducer assembly 12, and the water circuit 32 and the oil circuit 31 are integrated in the housing, thereby shortening the fluid conveying path and reducing energy loss. Meanwhile, the projection of the heat exchanger 13 along the third direction Z is located within the projection range of the controller assembly 2, further optimizing the spatial layout and improving the integration of the cooling system. The electronic oil pump 14 provides power for the flow of lubricating oil, and the filter 15 can filter impurities in the lubricating oil to ensure the smoothness of the oil circuit 31 and the lubrication effect, thereby ensuring the stable operation of the electric drive system under long-time and high-load working conditions and prolonging the service life.

[0049] In some embodiments, with reference to Figure 2 The electric drive transmission assembly 1 can further include an electronic oil pump 14, which can be arranged on the reducer assembly 12. The electronic oil pump 14 can be connected to the oil circuit 31 and used to drive the flow of lubricating oil. The electronic oil pump 14 can be a high-pressure gear pump, which has the characteristics of high pressure, stable flow, and low noise. The electronic oil pump 14 can drive the lubricating oil to circulate in the oil circuit 31, thereby providing lubrication and cooling for the moving parts of the motor assembly 11 and the reducer assembly 12.

[0050] With reference to Figure 2The electric drive assembly 1 may also include a filter 15, which can be mounted on the reducer assembly 12. The filter 15 can be connected to the oil passage 31 and is used to filter the lubricating oil. The filter 15 can be made of paper filter elements, which have the characteristics of high filtration accuracy, low resistance, and long service life. The filter 15 can filter impurities in the lubricating oil, preventing impurities from entering between moving parts, causing wear and malfunctions, and ensuring the smooth flow of oil passage 31 and effective lubrication.

[0051] Among them, reference Figure 2 The electronic oil pump 14 and the filter 15 are arranged side by side on the end of the reducer assembly 12 in the second direction Y, near the motor assembly 11. As an example, the size of the reducer assembly 12 in the first direction X is larger than the size of the motor assembly 11 in the first direction X. When the motor assembly 11 and the reducer assembly 12 are distributed along the second direction Y, the end where the reducer assembly 12 is connected to the motor assembly 11 forms a free space. The electronic oil pump 14 and the filter 15 can be arranged side by side in the free space, avoiding the occupation of space in other directions, and facilitating installation and maintenance.

[0052] In this application, the electric drive transmission assembly 1 achieves a compact overall structure by rationally arranging the relative positions of the motor assembly 11, the reducer assembly 12, the heat exchanger 13, the electronic oil pump 14, and the filter 15, which in particular reduces the size of the electric drive system in the first direction X and the third direction Z.

[0053] Reference Figure 3 and Figure 5 By arranging the multiple control modules 22 of the controller assembly 2 in a flat configuration, the size of the controller assembly 2 in the third direction Z is reduced. The size of the electric drive system in the third direction Z is H, which satisfies: 310mm ≤ H ≤ 320mm. For example, the size H of the electric drive system in the third direction Z can be any value among 310mm, 311mm, 312mm, 313mm, 314mm, 315mm, 316mm, 317mm, 318mm, 319mm, 320mm, etc., or any value between any two. In this embodiment, the size H of the electric drive system in the third direction Z can be 310mm.

[0054] Reference Figure 5The flat design and integrated installation of the heat exchanger 13 compresses the size of the electric drive system in the first direction X, and the size of the electric drive system in the first direction X is W, which satisfies 430mm≤W≤455mm. For example, the size of the electric drive system in the first direction X can be any value in 430mm, 433mm, 436mm, 439mm, 442mm, 445mm, 448mm, 451mm, 454mm, 455mm, or any value between any two values. In this embodiment, the size of the electric drive system in the first direction X can be 430mm.

[0055] As an example, the working principle of the cooling assembly 3 is as follows: after the electronic oil pump 14 is started, the lubricating oil flows out of the heat exchanger 13 through the oil inlet end 311 of the oil path 31. The lubricating oil can first flow through the filter 15, and after the filter 15 filters the lubricating oil, the lubricating oil can flow through the motor assembly 11 and the reducer assembly 12 to lubricate and cool the moving parts, and the lubricating oil after absorbing heat flows into the heat exchanger 13 through the oil outlet end 312 of the oil path 31. At the same time, the coolant flows into the water inlet end 321 of the water path 32 from the water inlet pipe 33, and the coolant flows through the water path 32 of the controller assembly 2, the motor assembly 11 and the reducer assembly 12 to cool each part, and the coolant after absorbing heat flows into the water inlet 133 of the heat exchanger 13 through the water outlet end 322 of the water path 32. Inside the heat exchanger 13, the lubricating oil and the coolant exchange heat, the heat of the lubricating oil is absorbed by the coolant, the cooled lubricating oil flows back to the oil inlet end 311 of the oil path 31 through the oil outlet 132 of the heat exchanger 13, and the lubricating oil circulation is completed. The cooled coolant flows into the water outlet pipe 34 through the water outlet 134 of the heat exchanger 13, flows into the radiator of the vehicle through the water outlet pipe 34, and is cooled by the radiator before being recycled, completing the coolant circulation.

[0056] According to the second aspect of the present application, an embodiment of the present application provides a vehicle comprising the electric drive system of any one of the above, which can be arranged at a front drive position and / or a rear drive position of the vehicle, and can realize front drive, rear drive or four-wheel drive driving mode, so as to flexibly select the driving mode according to the vehicle type, and expand the vehicle type adaptation range.

[0057] When the electric drive system is arranged at the front drive position of the vehicle, the second direction Y of the electric drive system is consistent with the length direction of the vehicle, the motor assembly 11 and the reducer assembly 12 are arranged along the length direction of the vehicle, the output shaft of the motor assembly 11 can be connected with the front drive axle (not shown) of the vehicle, power is transmitted to the front wheel (not shown) through the front drive axle, and front drive driving is realized. At this time, the size W of the electric drive system in the first direction X can be 430 mm, which can adapt to the feature that the space in the first direction X of the front compartment (not shown) is narrow, and the size H of the electric drive system in the third direction Z can be 310 mm, which does not affect the arrangement of other components in the front compartment and the safety performance in a collision.

[0058] When the electric drive system is arranged at the front drive position of the vehicle, the second direction Y of the electric drive system is consistent with the length direction of the vehicle, the motor assembly 11 and the reducer assembly 12 are arranged along the length direction of the vehicle, the output shaft of the motor assembly 11 can be connected with the front drive axle (not shown) of the vehicle, power is transmitted to the front wheel (not shown) through the front drive axle, and front drive driving is realized. At this time, the size W of the electric drive system in the first direction X can be 430 mm, which can adapt to the feature that the space in the first direction X of the front compartment (not shown) is narrow, and the size H of the electric drive system in the third direction Z can be 310 mm, which does not affect the arrangement of other components in the front compartment and the safety performance in a collision.

[0059] When the vehicle adopts four-wheel drive, one set of electric drive system can be arranged at the front drive position and the rear drive position of the vehicle, and the operation of the two sets of electric drive systems can be coordinated and controlled through the vehicle controller 224, four-wheel drive is realized, and meanwhile, the power of the front and rear wheels can be flexibly distributed according to the driving condition of the vehicle, and the driving stability and passability of the vehicle are improved.

[0060] In the description of the present application, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0061] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0062] The embodiments, implementation manners and related technical features of the present application can be combined and replaced with each other without conflict.

[0063] The above are only the preferred embodiments of the present application, and do not limit the present application in any form, but any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application and according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. An electric drive system, characterized by The electric drive system has a first direction, a second direction and a third direction intersecting with each other, and comprises an electric drive transmission assembly and a controller assembly, the electric drive transmission assembly and the controller assembly are arranged in a stacked manner along the third direction; The controller assembly comprises a first housing and a plurality of control modules, the first housing has a first accommodating cavity for accommodating the plurality of control modules, and the plurality of control modules are arranged in a tiled manner in a plane defined by the first direction and the second direction, so as to reduce the size of the controller assembly in the third direction.

2. The electric drive system of claim 1, wherein, The electric drive transmission assembly comprises a motor assembly and a speed reducer assembly, and the motor assembly and the speed reducer assembly are arranged in a distributed manner along the second direction.

3. The electric drive system of claim 2, wherein, The electric drive system further comprises a cooling assembly, the cooling assembly comprises an oil circuit, at least one of the motor assembly and the speed reducer assembly is provided with an oil circuit, and the oil circuit is used for conveying lubricating oil; The cooling assembly further comprises a water circuit, at least one of the controller assembly, the motor assembly and the speed reducer assembly is provided with a water circuit, and the water circuit is used for conveying cooling liquid.

4. The electric drive system of claim 3, wherein, The cooling assembly further comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is connected with a water inlet end of the water circuit; The electric drive transmission assembly further comprises a heat exchanger, the heat exchanger has an oil inlet, an oil outlet, a water inlet and a water outlet; The oil inlet is communicated with an oil outlet end of the oil circuit, the oil outlet is communicated with an oil inlet end of the oil circuit, the water inlet is communicated with a water outlet end of the water circuit, and the water outlet is communicated with the water outlet pipe.

5. The electric drive system of claim 4, wherein, The heat exchanger is arranged on one side of the speed reducer assembly in the first direction, the oil inlet, the oil outlet, the water inlet and the water outlet are arranged on the side of the heat exchanger facing the speed reducer assembly, and the oil outlet end of the oil circuit, the oil inlet end of the oil circuit, the water outlet end of the water circuit and the water outlet pipe are all arranged on the speed reducer assembly; The projection of the heat exchanger along the third direction is located in the range of the projection of the controller assembly along the third direction.

6. The electric drive system of claim 4, wherein, The motor assembly comprises a second housing, the speed reducer assembly comprises a third housing, the water inlet pipe is arranged on the first housing, the water outlet pipe is arranged on the third housing, the first housing, the second housing and the third housing are all provided with the water circuit, and the second housing and the third housing are all provided with the oil circuit.

7. The electric drive system of claim 3, wherein, The electric drive transmission assembly further comprises an electronic oil pump, the electronic oil pump is arranged on the speed reducer assembly, the electronic oil pump is connected with the oil circuit, and the electronic oil pump is used for driving the lubricating oil to flow; The electric drive transmission assembly further comprises a filter, the filter is arranged on the speed reducer assembly, the filter is connected with the oil circuit, and the filter is used for filtering the lubricating oil; The electronic oil pump and the filter are arranged side by side on one end of the speed reducer assembly in the second direction close to the motor assembly.

8. The electric drive system of claim 1, wherein, The size of the electric drive system in the third direction is H, and satisfies: 310mm≤H≤320mm; and / or, The dimension of the electric drive system in the first direction is W, satisfying 430mm≤W≤455mm.

9. The electric drive system of claim 1, wherein, The plurality of control modules include a motor controller, an on-board charger, a direct current converter, a vehicle controller, and a high-voltage distribution box, and the controller assembly further includes a plurality of interfaces, including a busbar interface, a slow charging interface, a direct current interface, a low-voltage wire harness interface, and a fast charging interface. The busbar interface is connected to the motor controller, the slow charging interface is connected to the on-board charger, the direct current interface is connected to the direct current converter, the low-voltage wire harness interface is connected to the motor controller and the vehicle controller respectively, and the fast charging interface is connected to the high-voltage distribution box.

10. A vehicle characterized by comprising: The electric drive system as claimed in any one of claims 1 to 9 is arranged at a front drive position and / or a rear drive position of the vehicle.

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