Drive device, drive assembly, vehicle, and control method of drive device

Abstract

The present invention discloses a driving device, a driving assembly, a vehicle and a control method of the driving device, which relates to the field of vehicle technology and aims to solve the problem of how to reduce the temperature of a stator assembly, improve the thermal management capability of the driving device and improve the reliability of the driving device. The driving device includes a stator assembly, a rotor assembly, an oil circuit assembly and a first flow valve. The rotor assembly is movably inserted in the stator assembly. The oil circuit assembly includes an oil inlet pipe and a stator branch oil pipe and a rotor branch oil pipe connected to the oil inlet pipe. The stator branch oil pipe is connected to the stator assembly, and the rotor branch oil pipe is connected to the rotor assembly. The first flow valve is used to adjust the flow of the rotor branch oil pipe to control the flow of the stator branch oil pipe.

Description

Technical Field

[0001] The present invention relates to the field of vehicle technology, and in particular to a drive device, a drive assembly, a vehicle, and a control method for the drive device. Background Art

[0002] In the field of new energy vehicles, the drive device plays an important role. The drive device usually includes a stator assembly, a rotor assembly, and an oil circuit assembly. The rotor assembly can rotate relative to the stator assembly, and the oil circuit assembly can supply cooling fluid to the stator assembly and the rotor assembly to achieve cooling of the drive device.

[0003] Under high-speed conditions, the rotor assembly has a high rotational speed, which will generate negative pressure, causing the fluid flow rate of the cooling fluid flowing into the rotor assembly to increase, and the cooling fluid flow rate flowing into the stator assembly to decrease, causing the stator assembly temperature to be too high, and the thermal management capability of the drive device to be poor, affecting the reliability of the drive device. Summary of the invention

[0004] The object of the present invention is to provide a drive device, a drive assembly, a vehicle and a control method for the drive device, aiming to solve the problem of how to reduce the temperature of the stator assembly, improve the thermal management capability of the drive device, and improve the reliability of the drive device.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] The embodiment of the present application provides a driving device, including a stator assembly, a rotor assembly, an oil circuit assembly and a first flow valve. The rotor assembly is movably inserted in the stator assembly, the oil circuit assembly includes an oil inlet pipe, a stator branch oil pipe and a rotor branch oil pipe, the stator branch oil pipe is connected between the stator assembly and the oil inlet pipe, and the rotor branch oil pipe is connected between the rotor assembly and the oil inlet pipe. The first flow valve is used to adjust the flow of the rotor branch oil pipe to control the flow of the stator branch oil pipe.

[0007] The embodiment of the present application provides a driving device, in which, through the setting of the oil circuit assembly, the first fluid in the oil inlet pipe in the oil circuit assembly can be delivered to the stator assembly and the rotor assembly, so as to achieve cooling and lubrication of the stator assembly and the rotor assembly, thereby extending the service life of the driving device and improving the reliability of the driving device. Through the setting of the first flow valve, the flow of the first fluid delivered to the rotor assembly in the oil inlet pipe can be adjusted under the high-speed working condition of the rotor assembly, reducing the probability of excessive first fluid being delivered to the rotor assembly due to negative pressure generated by the excessive rotation speed of the rotor assembly, increasing the flow of the first fluid delivered to the stator assembly in the oil inlet pipe, thereby accurately distributing the flow of the first fluid, reducing the probability of overheating of the stator assembly, and improving the thermal management capability of the driving device.

[0008] In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 10,000 RPM.

[0009] A driving device provided in an embodiment of the present application, by setting the rotational speed of the rotor assembly, when the rotational speed is greater than or equal to 10000RPM, due to the high rotational speed of the rotor assembly, it is necessary to adjust the flow of the rotor branch oil pipe by controlling the opening of the first flow valve to control the flow of the stator branch oil pipe, so as to make the control of the first flow valve more precise.

[0010] In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 20,000 RPM.

[0011] A driving device provided in an embodiment of the present application, by setting the rotational speed of the rotor assembly, when the rotational speed is greater than or equal to 20000RPM, due to the high rotational speed of the rotor assembly, the pressure generated inside the rotor assembly is greatly different from the atmospheric pressure, so it is necessary to control the first flow valve to control the flow of the stator branch oil pipe, so that the control of the first flow valve is more precise and more efficient.

[0012] In some embodiments, the rotor assembly can operate at a first speed and a second speed, the second speed being greater than the first speed; when the rotor assembly is at the first speed, the opening of the first flow valve is the first opening, and the flow of the rotor branch oil pipe is the first flow; when the rotor assembly is at the second speed, the opening of the first flow valve is the second opening, and the flow of the rotor branch oil pipe is the second flow; the first opening is greater than the second opening, and the second flow is greater than the first flow.

[0013] A drive device provided in an embodiment of the present application, by setting the first flow valve to a first opening at a first speed of the rotor assembly and to a second opening at a second speed, is advantageously used to adjust the opening of the first flow valve according to different speeds of the rotor assembly, and is advantageously used to balance the flow of the first fluid inside the rotor branch oil pipe and the stator branch oil pipe, thereby reducing the probability of excessive or insufficient flow of the first fluid inside the stator branch oil pipe, and improving the thermal management capability of the drive device.

[0014] In some embodiments, the first rotation speed satisfies: greater than 0 and less than or equal to 20000 RPM, and the second rotation speed satisfies: between 20000 RPM and A, 23000 RPM≤A≤27000 RPM.

[0015] A driving device provided in an embodiment of the present application makes the first flow valve of the driving device more convenient and easier to use during implementation by setting specific numerical values ​​of the first rotational speed and the second rotational speed.

[0016] In some embodiments, the rotor assembly is capable of operating at a third speed, which is greater than the second speed. When the rotor assembly is at the third speed, the opening of the first flow valve is a third opening, the flow of the rotor branch oil pipe is a third flow, the third flow is greater than the second flow, and the third opening is greater than the first opening.

[0017] A driving device provided in an embodiment of the present application sets the first flow valve to a third opening degree at a third rotational speed of the rotor assembly, so that when the rotational speed of the rotor assembly is relatively high, the flow rate of the first fluid flowing into the stator branch oil pipe is relatively high, thereby ensuring the heat exchange effect of the first fluid on the stator assembly and improving the heat exchange reliability of the driving device.

[0018] In some embodiments, the third rotation speed satisfies: A or above.

[0019] A driving device provided in an embodiment of the present application makes the first flow valve of the driving device more convenient and easier to use during implementation by setting a specific numerical value of the third speed. By adjusting the first flow valve, the heat exchange effect on the stator assembly is improved, while the probability of excessive first fluid flowing into the rotor branch oil pipe is reduced.

[0020] In some embodiments, the first flow valve is installed on the rotor oil branch pipe and / or the stator oil branch pipe.

[0021] A driving device provided in an embodiment of the present application can accurately control the flow rate of the first fluid inside the rotor branch oil pipe by installing the first flow valve on the rotor branch oil pipe, thereby improving the efficiency of the first flow valve in indirectly controlling the flow rate of the first fluid inside the stator branch oil pipe by directly controlling the flow rate of the first fluid inside the rotor branch oil pipe.

[0022] In some embodiments, the first flow valve comprises a proportional solenoid valve.

[0023] A driving device provided in an embodiment of the present application can realize remote control of the first flow valve by setting the first flow valve, and can accurately control the flow of the first fluid with high controllability.

[0024] In some embodiments, the stator assembly includes a stator body and a winding. The stator body is cylindrical, has a plurality of first flow channels, two ends of the first flow channels are respectively located at two ends of the stator body along the axial direction, the stator branch oil pipe is connected to the first flow channel, a plurality of protrusions are provided on the inner wall of the stator body, the winding is wound on the protrusions, and the winding is arranged to protrude from the stator body along the axial direction of the stator body.

[0025] A driving device provided in an embodiment of the present application can deliver a first fluid to a stator body by setting a first flow channel and connecting the first flow channel to a stator branch oil pipe, thereby cooling the stator body and windings and reducing the probability of overheating of the stator assembly. Secondly, the two ends of the first flow channel are respectively located at the two ends of the stator body along the axial direction X, and the first flow channel is embedded in the stator body, which can increase the contact area between the first fluid flowing into the first flow channel and the stator body, thereby improving the cooling efficiency of the stator assembly.

[0026] In some embodiments, each first flow channel extends in an axial direction of the stator body.

[0027] A driving device provided in an embodiment of the present application can improve the uniformity of cooling the stator assembly and simplify the manufacturing process, making it easy to process, by configuring each first flow channel to extend along the axial direction X of the stator body.

[0028] In some embodiments, a first sub-path is connected to the first flow channel at one end; a second sub-path is connected to the first flow channel at one end, and the connecting sub-path has a first port, a second port, and a third port. The first port is connected to the oil inlet pipe, the second port is connected to the other end of the first sub-path, and the third port is connected to the other end of the second sub-path.

[0029] A driving device provided in an embodiment of the present application improves the rationality of the arrangement of the stator branch oil pipes by setting up the first sub-path, the second sub-path, and the connecting sub-path, which can not only ensure the function of the stator branch oil pipes, but also reduce the space occupied by the stator branch oil pipes in the driving device, with a reasonable layout and a compact structure.

[0030] In some embodiments, the oil inlet pressure of the first sub-path is different from the oil inlet pressure of the second sub-path.

[0031] A driving device provided in an embodiment of the present application can promote the flow of the first fluid in the intervals corresponding to the first sub-path and the second sub-path in the first flow channel through the above-mentioned configuration, reduce the probability of oil entrapment, improve the cooling effect, and reduce the probability of overheating.

[0032] In some embodiments, the stator oil branch pipe further includes a valve installed in the second sub-path or the portion of the connecting sub-path between the second port and the third port so that the oil inlet pressure of the second sub-path is lower than the oil inlet pressure of the first sub-path.

[0033] A driving device provided in an embodiment of the present application fully utilizes space through valve settings, eliminating the need to re-set space for installing valves at connecting sub-paths, thereby improving space utilization of the driving device.

[0034] In some embodiments, the stator further includes an end cover assembly, which is axially connected to one end of the stator body, and has a chamber, through which the stator oil branch pipe is respectively connected to the plurality of first flow channels.

[0035] A driving device provided in an embodiment of the present application facilitates cooling of at least one end of the stator assembly through the provision of an end cover assembly, thereby improving the cooling efficiency of the end of the stator assembly. In addition, the stator branch oil pipe flows into the first flow channel via the end cover assembly, which facilitates the connection between the stator branch oil pipe and the first flow channel, thereby simplifying the connection structure between the stator branch oil pipe and the first flow channel.

[0036] In some embodiments, the end cover assembly has a liquid inlet hole, the liquid inlet hole is connected to the chamber, and the stator branch oil pipe is connected to the liquid inlet hole.

[0037] A driving device provided in an embodiment of the present application realizes the connection between the stator oil branch pipe and the end cover assembly by setting a liquid inlet hole.

[0038] In some embodiments, the end cap assembly has a liquid outlet, and the liquid outlet is connected to the chamber.

[0039] A driving device provided in an embodiment of the present application can enable a first fluid to flow out of a stator assembly by setting a liquid outlet hole, thereby facilitating the circulation of the first fluid.

[0040] In some embodiments, a plurality of avoidance holes are provided on one side of the end cover assembly close to the stator body, and at least a portion of the winding is inserted into the avoidance holes and extends into the cavity.

[0041] A driving device provided in an embodiment of the present application can cool and lubricate the winding when the first fluid flows into the chamber by setting an avoidance hole, thereby increasing the contact area between the winding and the first fluid and making the cooling and lubrication effects more uniform.

[0042] In some embodiments, a sealing medium is filled between the winding and the end cap assembly.

[0043] A driving device provided in an embodiment of the present application has a sealing medium filled between the winding and the end cover assembly, so that the first fluid entering the chamber can accurately cool the winding located at the end of the stator body, thereby improving the accuracy of the cooling position.

[0044] In some embodiments, the end cover assembly includes a cover portion and a gasket. The gasket is located between the cover portion and the stator body, the gasket and the cover portion enclose a chamber, the gasket is provided with an avoidance hole, the gasket cover is arranged at one end of the stator body, and the first flow channel is opened in the area of ​​the end surface of the stator body not covered by the gasket.

[0045] A driving device provided in an embodiment of the present application simplifies the production process of the end cover assembly by providing a covering portion and a gasket, and the covering portion and the gasket are easy to assemble.

[0046] In some embodiments, the rotor assembly includes a second flow passage, and the rotor oil branch pipe is in communication with the second flow passage.

[0047] A driving device provided in an embodiment of the present application can cool the rotor assembly through the first fluid by setting a second flow channel, thereby reducing the probability of demagnetization of the rotor magnet.

[0048] In some embodiments, the rotor assembly includes a rotor shaft and a rotating part, the rotor shaft extends along the axial direction of the stator assembly, the rotating part is sleeved on the rotor shaft, and the second flow channel includes a first sub-flow channel, a second sub-flow channel, and a third sub-flow channel. The first sub-flow channel is arranged on the rotor shaft, the first sub-flow channel is communicated with the rotor branch oil pipe, the second sub-flow channel is arranged on the rotating part, the second sub-flow channel extends along the radial direction of the rotating part, the third sub-flow channel is arranged on the rotating part, the third sub-flow channel extends along the axial direction, and the second sub-flow channel is communicated with the first sub-flow channel and the third sub-flow channel respectively.

[0049] A driving device provided by an embodiment of the present application has a second flow channel including a first sub-flow channel, a second sub-flow channel, and a third sub-flow channel. The first fluid can flow into the first sub-flow channel to cool the rotor shaft, and can flow into the second sub-flow channel and the third sub-flow channel to cool the rotating part. Various parts of the rotor assembly can be fully cooled, thereby improving the cooling effect on various positions of the rotor assembly and ensuring sufficient cooling.

[0050] In some embodiments, the first sub-channel extends axially and has a first end and a second end. There are multiple second sub-channels, some of which are connected to the first end, and another part of which is connected to the second end.

[0051] A driving device provided in an embodiment of the present application is configured such that a portion of the second sub-channel is connected to the first end and another portion of the second sub-channel is connected to the second end, so that a first fluid flows into the second sub-channel from both ends of the first sub-channel, thereby reducing the probability that the first fluid only flows in from one end of the first sub-channel, causing heat accumulation at the other end of the first sub-channel.

[0052] In some embodiments, there are multiple third sub-channels, and the multiple third sub-channels are correspondingly connected to the multiple second sub-channels; each third sub-channel includes multiple branch channels extending axially, and the multiple branch channels are spaced apart along the circumferential direction of the rotor shaft, and each second sub-channel is connected to the multiple branch channels in the corresponding third sub-channel.

[0053] A driving device provided in an embodiment of the present application can cool different sub-parts of a rotating part by setting up multiple branch flow channels, and each second sub-flow channel is connected to multiple branch flow channels in the corresponding third sub-flow channel, thereby improving the uniformity of cooling the rotating part.

[0054] In some embodiments, the third sub-flow channel has an oil-swinging port located at an axial end of the rotating part, and in the radial direction of the rotating part, the oil-swinging port is arranged corresponding to the stator assembly to discharge oil toward the stator assembly.

[0055] A driving device provided in an embodiment of the present application can achieve the outflow of the first fluid located in the second flow channel through the setting of the oil-throwing port, thereby realizing the circulation of the first fluid in the second flow channel, and is beneficial to spraying oil into the winding of the stator assembly, thereby improving the lubrication effect on the winding.

[0056] In some embodiments, the driving device has a third flow channel, and the third flow channel is used for heat exchange with the outer wall of the stator assembly.

[0057] A driving device provided in an embodiment of the present application can cool the outer wall of the stator assembly by setting a third flow channel, thereby improving the efficiency of heat dissipation from the outer wall of the stator assembly, increasing the probability of the stator assembly operating within a controllable temperature range, and further extending the life of the driving device.

[0058] In some embodiments, the driving device further includes a housing component, which is disposed around an outer wall of the stator, and a third flow channel is formed inside the housing component.

[0059] A driving device provided in an embodiment of the present application can protect the stator assembly through the setting of the shell assembly, reduce the probability of mechanical damage to the stator assembly, and improve the seismic performance of the driving device. The third flow channel is integrated by using the shell assembly to improve the utilization of space.

[0060] In some embodiments, the third flow channel includes a first portion and a second portion. The first portion is extended along the axial direction of the stator assembly, and the second portion includes a plurality of sub-portions extending along the circumferential direction of the stator and arranged in sequence along the axial direction, each adjacent sub-portion is connected end to end, and one of the sub-portions located at both ends of the axial direction is connected to the first portion, so that the first portion and the second portion are connected to form the third flow channel.

[0061] A driving device provided in an embodiment of the present application has a compact structure through the arrangement of the first part and the second part, so that the third flow channel realizes a longer cooling path, the cooling effect is more uniform, and space can be saved.

[0062] In some embodiments, the driving device further comprises a supply device, which is connected to the oil inlet pipe of the oil circuit assembly and can supply the first fluid to the oil inlet pipe.

[0063] A driving device provided in an embodiment of the present application, through the provision of a supply device, utilizes the interior of the driving device to supply a first fluid to an oil inlet pipe, without the need for an external connection supply component, thereby improving the integration effect of the driving device.

[0064] In some embodiments, the supply device includes a heat exchanger for cooling the first fluid supplied to the oil inlet pipe.

[0065] A driving device provided in an embodiment of the present application can perform heat exchange with a first fluid through the setting of a heat exchanger, thereby ensuring that the temperature of the first fluid flowing into the oil inlet pipe is within a preset range, thereby ensuring the cooling effect of the first fluid on the stator assembly and the rotor assembly.

[0066] In some embodiments, the heat exchanger includes an oil inlet pipe, an oil outlet pipe, and a first connecting pipe; the first connecting pipe is connected between the oil inlet pipe and the oil outlet pipe, and the first connecting pipe selectively connects the oil inlet pipe and the oil outlet pipe.

[0067] The embodiment of the present application provides a driving device, which can selectively connect the oil inlet pipe and the oil outlet pipe through the heat exchanger including the oil inlet pipe, the oil outlet pipe and the first connecting pipe. When the temperature of the first fluid is high, the two can be controlled to be connected, so that the stator assembly and / or the rotor assembly can be effectively cooled. When the temperature of the first fluid is low, the two can be controlled to be disconnected, so that the first fluid can be kept warm, reducing the probability of the first fluid viscosity decreasing due to too low temperature, resulting in increased oil stirring loss.

[0068] In some embodiments, the supply device further includes a first valve configured to enable the first connecting pipe to selectively connect the oil inlet pipe and the oil outlet pipe.

[0069] A driving device provided in an embodiment of the present application, through the setting of the first valve, makes it easier to implement the step of selectively connecting the first connecting pipe to the oil inlet pipe and the oil outlet pipe.

[0070] In some embodiments, the supply device further includes a first driving pump for driving the first fluid to be supplied to the oil inlet pipe.

[0071] A driving device provided in an embodiment of the present application drives the flow of a first fluid through the provision of a first driving pump, thereby creating conditions for cooling.

[0072] In some embodiments, the heat exchanger has a cooling channel for circulating a cooling medium therein, and the cooling channel can exchange heat with the first fluid to cool the first fluid.

[0073] A driving device provided in an embodiment of the present application makes the structure of the heat exchanger simple and easy to implement by setting a cooling channel for heat exchange with the first fluid.

[0074] In some embodiments, the drive device also includes a shell assembly, which is arranged around the outer wall of the stator assembly, and a third flow channel is formed inside the shell assembly. The supply device also includes a liquid inlet pipe, a first liquid outlet pipe, a second liquid outlet pipe and a second valve; the liquid inlet pipe is connected to one end of the cooling flow channel, and the other end of the cooling flow channel is selectively connected to the first liquid outlet pipe and the second liquid outlet pipe through the second valve, the first liquid outlet pipe is connected to the third flow channel, and the second liquid outlet pipe is suitable for connecting to the water circulation system of the vehicle.

[0075] A driving device provided in an embodiment of the present application, through the above-mentioned arrangement, enables the cooling medium in the cooling channel to not only cool the first fluid in the heat exchanger, but also perform heat exchange on the outer wall of the stator assembly, thereby realizing the multifunctional utilization of the cooling medium.

[0076] In some embodiments, the supply device further includes a second driving pump for driving the cooling medium to flow.

[0077] A driving device provided in an embodiment of the present application can drive a cooling medium by setting a second driving pump, thereby enabling the cooling medium to circulate.

[0078] An embodiment of the present application provides a drive assembly, comprising any one of the above-mentioned drive devices.

[0079] A drive assembly provided in an embodiment of the present application can more efficiently control the heat exchange process in the drive device through the setting of the drive device, thereby improving the heat exchange capacity of the drive assembly and extending the service life of the drive assembly.

[0080] An embodiment of the present application provides a vehicle, comprising any one of the above-mentioned drive assemblies.

[0081] A vehicle provided in an embodiment of the present application, through the setting of a drive assembly, the drive assembly includes a drive device, which can cool the stator component and the rotor component of the drive device, thereby improving the reliability of vehicle operation.

[0082] A control method for a drive assembly provided in an embodiment of the present application includes: when the rotation speed of a rotor assembly satisfies a first predetermined condition, adjusting the opening of a first flow valve.

[0083] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned setting, the opening of the first flow valve can be adjusted under the first preset condition, thereby achieving efficient control of the first flow valve, thereby reducing the probability of an increase in the flow rate of the first fluid flowing into the rotor assembly due to negative pressure generated by the high rotational speed of the rotor assembly, thereby improving the cooling effect on the stator assembly.

[0084] In some embodiments, the first predetermined condition is that the rotation speed of the rotor assembly is greater than 10,000 RPM, or the first predetermined condition is that the rotation speed of the rotor assembly is greater than 20,000 rpm.

[0085] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned configuration, the first flow valve can more accurately adjust the opening according to the state of the rotor assembly.

[0086] In some embodiments, if the rotational speed of the rotor assembly is greater than 0 and less than or equal to 20000RPM, the opening of the first flow valve is controlled to be the first opening, and the flow rate of the rotor branch oil pipe is the first flow rate; if the rotational speed of the rotor assembly is greater than 20000RPM and less than or equal to A, 23000RPM≤A≤27000RPM, the opening of the first flow valve is controlled to be the second opening, and the flow rate of the rotor branch oil pipe is the second flow rate; if the rotational speed of the rotor assembly is greater than A, the opening of the first flow valve is controlled to be the third opening, and the flow rate of the rotor branch oil pipe is the third flow rate, the third opening is greater than the first opening, the first opening is greater than the second opening, the third flow rate is greater than the second flow rate, and the second flow rate is greater than the first flow rate.

[0087] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned setting, the flow of the rotor branch oil pipe is controlled by adjusting the opening of the first flow valve to adapt to the working requirements of the rotor assembly at different speeds. The above-mentioned control strategy helps to improve the efficiency and reliability of the drive device.

[0088] In some embodiments, when the temperature information of the stator assembly meets a second predetermined condition, the opening degree of the first flow valve is adjusted.

[0089] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned flow control strategy based on the temperature of the stator component, by monitoring the temperature and dynamically adjusting the opening of the first flow valve according to the second predetermined condition, the probability of safe and efficient operation of the drive device can be improved, which helps to improve the adaptability and reliability of the drive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0091] Figure 1 This is a schematic diagram of the structure of a vehicle in an embodiment of the present application;

[0092] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of a cooling flow path in a driving device in a vehicle shown;

[0093] Figure 3 for Figure 2 A schematic cross-sectional view of a partial structure of a stator assembly of the drive device shown;

[0094] Figure 4 for Figure 2 An exploded schematic diagram of a stator assembly of the drive device shown;

[0095] Figure 5 for Figure 4 An enlarged schematic diagram of region F is shown;

[0096] Figure 6 for Figure 2 A schematic plan view of a partial structure of the driving device shown;

[0097] Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure of the second flow channel of the driving device shown;

[0098] Figure 8 for Figure 2 A schematic diagram of the three-dimensional structure of the third flow channel of the driving device shown;

[0099] Fig. 9 It is a three-dimensional schematic diagram of a partial structure of a supply device in an embodiment of the present application;

[0100] Fig.10 for Fig. 9 The schematic front view shown;

[0101] Fig.11 for Fig.10 Schematic top view shown.

[0102] Reference numerals:

[0103] 10 vehicle; 11 body; 12 wheel;

[0104] 111 stator body; A1 first flow channel; X axial direction; A2 protruding part;

[0105] 112 end cover assembly; C1 chamber; C2 liquid inlet hole; C3 liquid outlet hole; C4, avoidance hole; 1121 cover joint; 1122 gasket;

[0106] 121 second flow channel; 1211 first sub-flow channel; 1212 second sub-flow channel; 1213 third sub-flow channel; Q1 oil-slinging port;

[0107] 130 oil circuit components;

[0108] 131 oil inlet pipe;

[0109] 132 stator oil branch pipe; 1321 first sub-channel; 1322 second sub-channel; 1323 connecting sub-channel; H1 first port; H2 second port; H3 third port; 1324 valve;

[0110] 133 rotor oil pipe;

[0111] 140 a first flow valve;

[0112] 151 third flow channel; 1511 first part; 1512 second part;

[0113] 160 supply device;

[0114] 161 heat exchanger; 1611 oil inlet pipe; 1612 oil outlet pipe; 1613 first connecting pipe;

[0115] 162 first valve;

[0116] 163 liquid inlet pipe;

[0117] 164 a first liquid outlet pipe;

[0118] 165 second valve;

[0119] 166 second liquid outlet pipe. DETAILED DESCRIPTION

[0120] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0121] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0122] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0123] In the embodiments of the present invention, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, article or device including the element.

[0124] In the embodiments of the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0125] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0126] The present application provides a vehicle. The vehicle may be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid vehicle, an extended-range electric vehicle, a fuel vehicle, etc. The vehicle may also be a car, a van, a bus, a truck, a trailer, etc.

[0127] like Figure 1 As shown, Figure 1 1 is a schematic diagram of the structure of a vehicle 10 in an embodiment of the present application. The vehicle 10 includes a body 11 and wheels 12. The body 11 is used for passengers to sit and carry objects, and the wheels 12 are installed under the body 11 to carry the body 11 and can roll on the road surface to enable the vehicle 10 to travel.

[0128] The vehicle 10 further includes a drive assembly, which includes a drive device. The function of the drive device includes converting electrical energy into mechanical energy to enable the vehicle 10 to travel.

[0129] The specific structure of the driving device is described in detail below.

[0130] Please refer to Figures 2 to 6 As shown, Figure 2 for Figure 1 The three-dimensional structural diagram of the cooling flow path in the driving device of the vehicle shown in FIG. Figure 3 for Figure 2 A schematic cross-sectional view of a partial structure of a stator assembly of the drive device shown in FIG. Figure 4 for Figure 2 An exploded schematic diagram of the stator assembly of the drive device shown, Figure 5for Figure 4 The enlarged schematic diagram of the F region is shown. Figure 6 for Figure 2 A schematic plan view of a partial structure of the driving device shown. The embodiment of the present application provides a driving device, including a stator assembly, a rotor assembly, an oil circuit assembly 130 and a first flow valve 140. The rotor assembly is movably inserted in the stator assembly, and the oil circuit assembly 130 includes an oil inlet pipe 131, a stator branch oil pipe 132 and a rotor branch oil pipe 133. The stator branch oil pipe 132 is connected between the stator assembly and the oil inlet pipe 131, and the rotor branch oil pipe 133 is connected between the rotor assembly and the oil inlet pipe 131. The first flow valve 140 is used to adjust the flow of the rotor branch oil pipe 133 to control the flow of the stator branch oil pipe.

[0131] The oil inlet pipe 131 , the stator branch oil pipe and the rotor branch oil pipe 133 are used to transport the first fluid, and the first fluid can cool and lubricate the stator assembly and the rotor assembly.

[0132] The first flow valve 140 includes but is not limited to a proportional solenoid valve, an electric regulating valve, and the like.

[0133] The embodiment of the present application provides a driving device, through the setting of the oil circuit component 130, the oil circuit component 130 can deliver the first fluid to the stator component and the rotor component, so as to achieve cooling and lubrication of the stator component and the rotor component, thereby extending the service life of the driving device and improving the reliability of the driving device. Through the setting of the first flow valve 140, the flow of the first fluid delivered to the rotor component can be adjusted under the high-speed working condition of the rotor component, reducing the probability of excessive first fluid being delivered to the rotor component due to negative pressure generated by the excessive rotation speed of the rotor component, thereby accurately distributing the flow of the first fluid, reducing the probability of overheating of the stator component, and improving the thermal management capability of the driving device.

[0134] In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 10,000 RPM.

[0135] A driving device provided in an embodiment of the present application sets the rotation speed of the rotor assembly. When the rotation speed is greater than or equal to 10000 RPM, due to the high rotation speed of the rotor assembly, negative pressure will be generated in the rotor branch oil pipe 133. Under the action of the negative pressure, the amount of the first fluid entering the rotor branch oil pipe 133 will be greater than the expected amount of the first fluid, resulting in the amount of the first fluid entering the stator branch oil pipe 132 being less than the expected amount of the first fluid, thereby causing the stator assembly to not be sufficiently cooled and to have an overtemperature fault. It is necessary to adjust the flow of the rotor branch oil pipe 133 by controlling the opening of the first flow valve 140 to control the flow of the stator branch oil pipe 132, so as to make the control of the first flow valve 140 more precise.

[0136] In the embodiment of the present application, the first flow valve 140 is used to adjust the oil flow on the rotor branch oil pipe 133. When the rotor assembly is stationary, the larger the opening, the greater the flow to the rotor branch oil pipe 133.

[0137] The first flow valve 140 can be installed on either the rotor oil branch pipe 133 or the stator oil branch pipe 132 .

[0138] When the first flow valve 140 is installed on the rotor branch oil pipe 133, it can directly control the oil flow flowing into the rotor branch oil pipe 133. The larger the opening degree, the larger the flow area of ​​the first flow valve 140, and the greater the oil flow entering the rotor branch oil pipe 133 from the oil inlet pipe.

[0139] It should be noted that when the first flow valve 140 is installed on the stator oil branch pipe 132, it can indirectly control the flow of oil in the rotor oil branch pipe 133. The larger the opening, the smaller the flow area of ​​the first flow valve 140, and the smaller the oil flow entering the stator oil branch pipe 132 from the oil inlet pipe, so that the flow entering the rotor oil branch pipe 133 is larger.

[0140] Specifically, the amount of the first fluid between the rotor branch oil pipe 133 and the stator branch oil pipe 132 can be measured when the rotor assembly is stationary, for example, when the battery of the vehicle 10 is being charged, and the amount of the first fluid between the rotor branch oil pipe 133 and the stator branch oil pipe 132 can be compared to obtain the change in the opening of the first flow valve 140. The opening of the first flow valve 140 can also be obtained by directly acquiring the valve core angle signal of the first flow valve 140. The larger the valve core angle, the larger the flow area of ​​the first flow valve 140; for example, when the first flow valve 140 is installed on the rotor branch oil pipe 133, the larger the valve core angle of the first flow valve 140, the larger the opening of the first flow valve 140; when the first flow valve 140 is installed on the stator branch oil pipe 132, the larger the valve core angle of the first flow valve 140, the smaller the opening of the first flow valve 140.

[0141] The first flow valve 140 may be a ball valve. When the first flow valve 140 is a ball valve, a through hole penetrating the valve core is provided on the valve core. When the valve core angle is 0, the through hole is not connected to the rotor branch oil pipe 133 or the stator branch oil pipe 132, and the flow area is 0. As the valve core rotates, the greater the degree of connection between the through hole and the rotor branch oil pipe 133 or the stator branch oil pipe 132, the greater the flow area. When the valve core rotates at an angle of 90°, the through hole is completely connected to the rotor branch oil pipe 133 or the stator branch oil pipe 132, and the flow area is 100%.

[0142] When the rotor assembly is in a rotating state, due to the negative pressure suction effect of the rotor assembly, the oil flow entering the rotor branch oil pipe 133 is controlled by the opening of the first flow valve 140 and is affected by the negative pressure suction effect of the rotor assembly. Therefore, when the rotor assembly is in a rotating state, the opening size of the first flow valve 140 cannot be directly obtained by measuring the flow of the rotor branch oil pipe 133.

[0143] In some embodiments, the rotational speed of the rotor assembly is greater than or equal to 20,000 RPM.

[0144] When the rotation speed of the rotor assembly is below 20,000 RPM, the suction effect of the rotor assembly on the first fluid is relatively weak, and when the rotation speed of the rotor assembly is above 20,000 RPM, the suction effect of the rotor assembly on the first fluid is relatively strong.

[0145] A driving device provided in an embodiment of the present application sets the rotational speed of the rotor assembly. When the rotational speed is greater than or equal to 20000 RPM, due to the high rotational speed of the rotor assembly, the negative pressure inside the rotor assembly is enhanced, and the adverse effect on the cooling of the stator is increased. Therefore, it is necessary to control the first flow valve 140 to control the flow of the stator branch oil pipe 132 so that the stator assembly can be fully cooled and the probability of overheating is reduced.

[0146] In some embodiments, the rotor assembly can operate at a first speed and a second speed, the second speed being greater than the first speed; when the rotor assembly is at the first speed, the opening of the first flow valve 140 is the first opening, and the flow of the rotor branch oil pipe 133 is the first flow; when the rotor assembly is at the second speed, the opening of the first flow valve 140 is the second opening, and the flow of the rotor branch oil pipe 133 is the second flow; the first opening is greater than the second opening, and the second flow is greater than the first flow.

[0147] When the rotor assembly is at the second speed, the higher speed causes obvious wind friction loss, increased heat generation, and higher cooling demand. As the speed increases, the negative pressure effect in the rotor increases. At this time, the flow in the rotor branch oil pipe 133 is composed of the flow allocated by the first flow valve 140 and the flow sucked by the negative pressure. At this time, the cooling demand flow has increased by a part compared to the first speed. However, as the negative pressure effect begins to appear, the negative pressure suction flow has increased significantly. The flow allocated by the first flow valve 140 must be smaller than the flow allocated at the first speed, so that the actual flow entering the rotor branch oil pipe 133 is not too large, and the flow entering the stator branch oil pipe 132 is reduced.

[0148] It can be understood that when the rotor assembly is at the first speed, the actual flow rate entering the rotor oil branch pipe 133 is the first flow rate, and when the rotor assembly is at the second speed, the actual flow rate entering the rotor oil branch pipe 133 is the second flow rate. Since the first speed is greater than the second speed, the heat generated by the motor at the second speed is greater than the heat generated by the motor at the first speed. Therefore, by setting the second flow rate greater than the first flow rate, the rotor assembly can be effectively cooled, and the stator assembly can also be better cooled.

[0149] It can also be understood that when the rotor assembly is at the first speed, the flow distribution by the first flow valve 140 is achieved by the first flow valve 140 at the first opening, and when the rotor assembly is at the second speed, the flow distribution by the first flow valve 140 is achieved by the first flow valve 140 at the second opening. Since the first speed is greater than the second speed, and the increase in heat generation or cooling demand at the second speed is relatively small, while the increase in negative pressure suction of the rotor assembly at the second speed is relatively large, the setting of the second opening being smaller than the first opening can accurately distribute the flow in the rotor branch oil pipe 133 and the stator branch oil pipe 132, thereby better ensuring the cooling of the stator assembly.

[0150] "Opening degree" refers to the degree of opening of the first flow valve 140, and describes the size of the channel through which the first flow valve 140 allows the first fluid to pass. The larger the opening degree, the more first fluid flow the first flow valve 140 allows; the smaller the opening degree, the less first fluid flow the first flow valve 140 allows.

[0151] If the first flow valve 140 allows a larger flow rate of the first fluid to pass through, the opening of the first flow valve 140 will be larger. Conversely, if the first flow valve 140 allows a smaller flow rate of the first fluid to pass through, the opening of the first flow valve 140 will be smaller.

[0152] A driving device provided in an embodiment of the present application sets the first flow valve 140 to a first opening at a first speed of the rotor assembly, and sets the first flow valve 140 to a second opening at a second speed. This facilitates adjusting the opening of the first flow valve 140 according to different speeds of the rotor assembly, and facilitates balancing the flow rates of the first fluid inside the rotor branch oil pipe 133 and the stator branch oil pipe 132, thereby reducing the probability of excessive or insufficient flow of the first fluid inside the stator branch oil pipe 132, and improving the thermal management capability of the driving device.

[0153] In some embodiments, the first rotation speed satisfies: greater than 0 and less than or equal to 20000 RPM, and the second rotation speed satisfies: between 20000 RPM and A, 23000 RPM≤A≤27000 RPM.

[0154] 20000RPM<second speed≤A.

[0155] The first rotation speed may include rotation speed values ​​such as 0 RPM, 5000 RPM, 10000 RPM, and 15000 RPM.

[0156] In some embodiments, when A is 23000 RPM, the rotation speed of the rotor assembly satisfies the following conditions at all operating points from 20000 RPM to 23000 RPM: the second opening is smaller than the first opening, and the second flow rate is larger than the first flow rate.

[0157] In some embodiments, when A is 27000 RPM, the rotation speed of the rotor assembly satisfies the following conditions at all operating points from 20000 RPM to 27000 RPM: the second opening is smaller than the first opening, and the second flow rate is larger than the first flow rate.

[0158] A driving device provided in an embodiment of the present application makes the first flow valve 140 of the driving device more convenient and easier to use during implementation by setting specific values ​​of the first rotational speed and the second rotational speed.

[0159] In some embodiments, the rotor assembly is capable of operating at a third speed, which is greater than the second speed. When the rotor assembly is at the third speed, the opening of the first flow valve 140 is a third opening, and the flow of the rotor branch oil pipe 133 is a third flow, which is greater than the second flow, and the third opening is greater than the first opening.

[0160] When the rotation speed of the rotor assembly is at the third rotation speed, the cooling demand of the rotor assembly is greatly increased, and the opening of the first flow valve 140 needs to be increased to meet the cooling demand of the rotor assembly. At this time, the third opening is greater than the first opening.

[0161] An embodiment of the present application provides a driving device, in which the negative pressure suction effect of the rotor assembly is significantly enhanced at a third rotational speed, and the first flow valve 140 is set to the third opening, so that when the rotational speed of the rotor assembly is relatively high, the flow rate of the first fluid flowing into the stator branch oil pipe 132 is relatively large, thereby ensuring the heat exchange effect of the first fluid on the stator assembly and improving the heat exchange reliability of the driving device.

[0162] In some embodiments, the third rotation speed satisfies: A or above. The third rotation speed>A.

[0163] Optionally, A is 23000RPM or 27000RPM or any speed value between 23000RPM and 27000RPM.

[0164] For example, when A is 23000RPM, the third speed is greater than 23000RPM; when A is 25000RPM, the third speed is greater than 25000RPM; when A is 27000RPM, the third speed is greater than 27000RPM.

[0165] A driving device provided in an embodiment of the present application makes the first flow valve 140 of the driving device more convenient and easier to use during implementation by setting a specific numerical value of the third speed. By adjusting the first flow valve 140, the heat exchange effect on the stator assembly is improved, while the probability of excessive first fluid flowing into the rotor branch oil pipe 133 is reduced.

[0166] In some embodiments, the first flow valve 140 is installed on the rotor oil branch pipe 133 and / or the stator oil branch pipe 132 .

[0167] A driving device provided in an embodiment of the present application can accurately control the flow rate of the first fluid inside the rotor branch oil pipe 133 through the setting of the first flow valve 140, thereby improving the efficiency of the first flow valve 140 in indirectly controlling the flow rate of the first fluid inside the stator branch oil pipe 132 by directly controlling the flow rate of the first fluid inside the rotor branch oil pipe 133.

[0168] In some embodiments, the first flow valve 140 includes a proportional solenoid valve.

[0169] A driving device provided in an embodiment of the present application can achieve precise control of the first flow valve 140 through the setting of the first flow valve 140 including a proportional solenoid valve, and can accurately control the flow of the first fluid with high controllability.

[0170] In some embodiments, the stator assembly includes a stator body and a winding. The stator body 111 is cylindrical, and has a plurality of first flow channels A1. The two ends of the first flow channels A1 are respectively located at the two ends of the stator body 111 along the axial direction X. The stator branch oil pipe 132 is connected to the first flow channel A1. The inner wall of the stator body 111 is provided with a plurality of protrusions A2. The winding is wound on the protrusions A2. The winding is arranged to protrude from the stator body 111 along the axial direction X of the stator body 111.

[0171] The winding refers to a conductive coil for generating a magnetic field, and the assembly process of the winding being wound around the protruding portion A2 refers to the winding being wound into a rectangular coil, and after being shaped, being sleeved on the protruding portion A2.

[0172] The number of the first flow channels A1 includes two, three, or even more. The multiple first flow channels A1 are arranged at intervals in the circumferential direction of the stator body 111, and the number can be adjusted according to actual conditions. The extension direction of the first flow channel A1 includes extending along the axial direction X of the stator body 111, and can also intersect with the axial extension direction X of the stator body 111. Optionally, the first flow channel A1 is embedded in the stator body 111.

[0173] The stator branch oil pipe and the first flow channel A1 can be directly connected or indirectly connected. For example, the stator branch oil pipe is inserted into the first flow channel A1 to achieve the connection between the two, and a flow guide structure can also be provided between the stator branch oil pipe and the first flow channel A1 to achieve the connection between the two.

[0174] A driving device provided in an embodiment of the present application can deliver a first fluid to a stator body 111 by setting a first flow channel A1 and connecting the first flow channel A1 to a stator branch oil pipe, thereby cooling the stator body 111 and the windings and reducing the probability of overheating of the stator assembly. Secondly, the two ends of the first flow channel A1 are respectively located at the two ends of the stator body 111 along the axial direction X, and the first flow channel A1 is embedded in the stator body 111, which can increase the contact area between the first fluid flowing into the first flow channel A1 and the stator body 111, thereby improving the cooling efficiency of the stator assembly.

[0175] In some embodiments, each first flow channel A1 extends along the axial direction X of the stator body 111 .

[0176] The shape of the cross section of the first flow channel A1 includes but is not limited to circular, square or other special shapes.

[0177] A driving device provided in an embodiment of the present application can improve the uniformity of cooling the stator assembly and simplify the manufacturing process for easy processing by arranging each first flow channel A1 to extend along the axial direction X of the stator body 111.

[0178] In some embodiments, one end of the first sub-path 1321 is connected to one end of the first flow channel A1; one end of the second sub-path 1322 is connected to the other end of the first flow channel A1, and the connecting sub-path 1323 has a first port H1, a second port H2, and a third port H3. The first port H1 is connected to the oil inlet pipe 131, the second port H2 is connected to the other end of the first sub-path 1321, and the third port H3 is connected to the other end of the second sub-path 1322.

[0179] A driving device provided in an embodiment of the present application improves the rationality of the arrangement of the stator branch oil pipe 132 through the setting of the first sub-path 1321, the second sub-path 1322, and the connecting sub-path 1323, which can not only ensure the function of the stator branch oil pipe 132, but also reduce the space occupied by the stator branch oil pipe 132 of the driving device, and has a reasonable layout and a compact structure.

[0180] In some embodiments, the oil inlet pressure of the first sub-path 1321 is not equal to the oil inlet pressure of the second sub-path 1322 .

[0181] The oil inlet pressure of the first sub-path 1321 may be greater than or less than the oil inlet pressure of the second sub-path 1322 .

[0182] A driving device provided in an embodiment of the present application can promote the flow of the first fluid in the interval corresponding to the first sub-path 1321 and the second sub-path 1322 in the first flow channel A1 through the above-mentioned pressure difference setting, thereby avoiding oil trapping between the first sub-path 1321 and the second sub-path 1322, so that there is no oil in part of the first flow channel A1 or the oil flow is slow, resulting in poor cooling of the stator assembly and overheating.

[0183] In some embodiments, the flow cross-sectional area of ​​the second sub-channel 1322 is greater than the flow cross-sectional area of ​​the first sub-channel 1321 . The larger the flow cross-sectional area, the smaller the pressure of the first fluid flowing inside.

[0184] In some embodiments, the stator oil branch pipe 132 further includes a valve 1324 , which is installed in the second sub-path 1322 or the connecting sub-path 1323 between the second port H2 and the third port H3 , so that the oil inlet pressure of the second sub-path 1322 is lower than the oil inlet pressure of the first sub-path 1321 .

[0185] The valve 1324 includes but is not limited to a mechanical pressure valve, a hydraulic regulating valve, etc.

[0186] A driving device provided in an embodiment of the present application simplifies the structural setting through the setting of valve 1324, does not require complicated processes, and can reduce costs.

[0187] In some embodiments, the stator assembly further includes an end cover assembly 112 , which is connected to one end of the stator body 111 along the axial direction X. The end cover assembly 112 has a chamber C1 , and the stator oil branch pipe 132 is connected to the plurality of first flow channels A1 respectively through the chamber C1 .

[0188] The end cover assembly 112 may include one or two. Optionally, the number of the end cover assembly 112 includes two. Optionally, along the axial direction X of the stator body 111, the shape of the orthographic projection of the chamber C1 includes a ring shape.

[0189] The first fluid in the stator oil branch pipe 132 may flow into the chamber C1 of the end cover assembly 112 , and then flow into the first flow channel A1 .

[0190] A driving device provided in an embodiment of the present application facilitates cooling of at least one end of the stator assembly through the provision of an end cover assembly 112, thereby improving the cooling efficiency of the end of the stator assembly. In addition, the stator branch oil pipe 132 flows into the first flow channel A1 via the end cover assembly 112, which facilitates the connection between the stator branch oil pipe 132 and the first flow channel A1, thereby simplifying the connection structure between the stator branch oil pipe 132 and the first flow channel A1.

[0191] In some embodiments, the end cover assembly 112 has a liquid inlet hole C2, the liquid inlet hole C2 is connected to the chamber C1, and the stator branch oil pipe 132 is connected to the liquid inlet hole C2.

[0192] The shape and number of the liquid inlet holes C2 can be adjusted according to actual conditions.

[0193] A driving device provided in an embodiment of the present application realizes the connection between the stator oil branch pipe 132 and the end cover assembly 1122 by setting the liquid inlet hole C2.

[0194] In some embodiments, the end cap assembly 112 has a liquid outlet C3 , and the liquid outlet C3 is connected to the chamber C1 .

[0195] A driving device provided in an embodiment of the present application can enable the first fluid to flow out of the stator assembly through the provision of the liquid outlet hole C3, thereby facilitating the circulation of the first fluid.

[0196] In some embodiments, a plurality of avoidance holes C4 are provided on one side of the end cover assembly 112 close to the stator body 111 , and at least a portion of the winding is inserted into the avoidance holes C4 and extends into the chamber C1 .

[0197] A driving device provided in an embodiment of the present application can perform immersion cooling and lubrication on the winding when the first fluid flows into the chamber C1 by setting the avoidance hole C4, thereby increasing the contact area between the winding and the first fluid and making the cooling and lubrication effect more uniform.

[0198] In some embodiments, a sealing medium is filled between the winding and the end cap assembly 112 .

[0199] A driving device provided in an embodiment of the present application is provided with a sealing medium filled between the winding and the end cover assembly 112, so that the chamber C1 and the first flow channel A1 are sealed and connected. The first fluid entering the chamber C1 can be stored to fully cool the winding located at the end of the stator body 111, thereby improving the cooling effect of the winding.

[0200] In some embodiments, the end cover assembly 112 includes a covering portion 1121 and a gasket 1122. The gasket 1122 is located between the covering portion 1121 and the stator body 111, and the gasket 1122 and the covering portion 1121 enclose a chamber C1, and the gasket 1122 is provided with an avoidance hole C4. The gasket 1122 is covered at one end of the stator body 111, and the first flow channel A1 is opened in the area of ​​one end of the stator body 111 that is not covered by the gasket 1122.

[0201] A driving device provided in an embodiment of the present application simplifies the production process of the end cover assembly 112 by disposing the covering portion 1121 and the gasket 1122, and the covering portion 1121 and the gasket 1122 are easy to assemble.

[0202] Please refer to Figure 7 As shown, Figure 7 for Figure 2 A schematic diagram of the three-dimensional structure of the second flow channel of the driving device shown.

[0203] In some embodiments, the rotor assembly includes a second flow channel 121 , and the rotor oil branch pipe 133 is in communication with the second flow channel 121 .

[0204] A driving device provided in an embodiment of the present application can cool the rotor assembly through the first fluid by setting the second flow channel 121, thereby reducing the probability of high-temperature demagnetization of the rotor assembly.

[0205] In some embodiments, the rotor assembly includes a rotor shaft and a rotating part, the rotor shaft extends along the axial direction X of the stator assembly, the rotating part is sleeved on the rotor shaft, and the second flow channel 121 includes a first sub-flow channel 1211, a second sub-flow channel 1212, and a third sub-flow channel 1213. The first sub-flow channel 1211 is arranged on the rotor shaft, the first sub-flow channel 1211 is communicated with the rotor branch oil pipe 133, the second sub-flow channel 1212 is arranged on the rotating part, the second sub-flow channel 1212 extends in the radial direction of the rotating part, the third sub-flow channel 1213 is arranged on the rotating part, the third sub-flow channel 1213 extends along the axial direction X, and the second sub-flow channel 1212 is communicated with the first sub-flow channel 1211 and the third sub-flow channel 1213.

[0206] A driving device provided in an embodiment of the present application, wherein the second flow channel 121 includes a first sub-flow channel 1211, a second sub-flow channel 1212, and a third sub-flow channel 1213. The first fluid can flow into the first sub-flow channel 1211 to cool the rotor shaft, and can flow into the second sub-flow channel 1212 and the third sub-flow channel 1213 to cool the rotating part. Various parts of the rotor assembly can be fully cooled, thereby improving the cooling effect on various positions of the rotor assembly and ensuring sufficient cooling.

[0207] In some embodiments, the first sub-channel 1211 extends along the axial direction X, and has a first end and a second end. There are multiple second sub-channels 1212, some of which are connected to the first end, and another part of which is connected to the second end.

[0208] A driving device provided in an embodiment of the present application is configured such that a portion of the second sub-channel 1212 is connected to the first end, and another portion of the second sub-channel 1212 is connected to the second end, so that the first fluid flows into the second sub-channel 1212 from both ends of the first sub-channel 1211, thereby reducing the probability that the first fluid only flows in from one end of the first sub-channel 1211, causing heat accumulation at the other end of the first sub-channel 1211.

[0209] In some embodiments, there are multiple third sub-channels 1213, and the multiple third sub-channels 1213 are correspondingly connected to the multiple second sub-channels 1212; each third sub-channel 1213 includes multiple branch channels extending along the axial direction X, and the multiple branch channels are arranged at intervals along the circumferential direction of the rotor shaft, and each second sub-channel 1212 is connected to multiple branch channels in the corresponding third sub-channel 1213.

[0210] A driving device provided in an embodiment of the present application can cool different sub-parts of a rotating part by setting up multiple branch flow channels, and each second sub-flow channel 1212 is connected to multiple branch flow channels in the corresponding third sub-flow channel 1213, thereby improving the uniformity of cooling the rotating part.

[0211] In some embodiments, the third sub-flow channel 1213 has an oil-swinging port Q1 located at an axial end of the rotating part. In the radial direction of the rotating part, the oil-swinging port is arranged corresponding to the stator assembly to discharge oil toward the stator assembly.

[0212] The oil-spraying port Q1 sprays oil to the winding of the stator assembly to lubricate and cool the winding.

[0213] The number and shape of the oil-slinging ports Q1 can be adjusted according to actual conditions.

[0214] It should be noted that as long as the oil sprayed from the oil-spraying port Q1 can reach the winding of the stator assembly and realize oil-spray cooling of the stator winding, it belongs to the case where the oil-spraying port Q1 and the stator assembly are set correspondingly in the present application.

[0215] A driving device provided in an embodiment of the present application can realize the outflow of the first fluid located in the second flow channel 121 through the setting of the oil-throwing port Q1, thereby realizing the circulation of the first fluid in the second flow channel 121 and lubricating and cooling the winding.

[0216] Please refer to Figure 8 As shown, Figure 8 for Figure 2 A schematic diagram of the three-dimensional structure of the third flow channel of the driving device shown.

[0217] In some embodiments, the driving device has a third flow channel 151, and the third flow channel 151 is used for heat exchange with the outer wall of the stator assembly.

[0218] A driving device provided in an embodiment of the present application can cool the outer wall of the stator assembly through the setting of the third flow channel 151, thereby improving the efficiency of heat dissipation from the outer wall of the stator assembly, increasing the probability of the stator assembly operating within a controllable temperature range, and further extending the life of the driving device.

[0219] In some embodiments, the driving device further includes a housing component, which is disposed around the outer wall of the stator, and a third flow channel 151 is formed inside the housing component.

[0220] A driving device provided in an embodiment of the present application can protect the stator assembly through the setting of the shell assembly, reduce the probability of mechanical damage to the stator assembly, and improve the seismic performance of the driving device. The third flow channel 151 is integrated by using the shell assembly to improve the utilization of space.

[0221] In some embodiments, the third flow channel 151 includes a first portion 1511 and a second portion 1512. The first portion 1511 is extended along the axial direction X of the stator assembly, and the second portion 1512 includes a plurality of sub-portions extending along the circumferential direction of the stator and arranged in sequence along the axial direction X, each adjacent sub-portion is connected end to end, and one of the sub-portions located at both ends of the axial direction X is connected to the first portion 1511, so that the first portion 1511 and the second portion 1512 are connected to form the third flow channel 151.

[0222] The width and length of the first portion 1511 can be adjusted according to actual conditions. The number of sub-portions of the second portion 1512, the width and radial dimensions of each sub-portion can be adjusted according to actual conditions.

[0223] A driving device provided in an embodiment of the present application has a compact structure through the arrangement of the first part 1511 and the second part 1512, so that the third flow channel 151 realizes a longer cooling path, making the cooling effect more uniform and saving space.

[0224] Please refer to Figures 9 to 11 As shown, Fig. 9 This is a three-dimensional schematic diagram of a partial structure of a supply device in an embodiment of the present application. Fig.10 for Fig. 9 As shown in the front view schematic diagram, Fig.11 for Fig.10 In some embodiments, the driving device further comprises a supply device 160. The supply device 160 is connected to the oil inlet pipe 131 of the oil circuit assembly 130, and the supply device 160 can supply the first fluid to the oil inlet pipe 131.

[0225] The embodiment of the present application provides a driving device, which, through the provision of a supply device 160, utilizes the interior of the driving device to supply the first fluid to the oil inlet pipe 131 without the need for an external connection supply component, thereby improving the integration effect of the driving device.

[0226] In some embodiments, the supply device 160 includes a heat exchanger 161 for cooling the first fluid supplied to the oil inlet pipe 131 .

[0227] The heat exchanger 161 includes, but is not limited to, an air-cooled oil cooler, a water-cooled oil cooler, and the like.

[0228] A driving device provided in an embodiment of the present application can perform heat exchange with the first fluid through the setting of the heat exchanger 161, thereby ensuring that the temperature of the first fluid flowing into the oil inlet pipe 131 is within a preset range, thereby ensuring the cooling effect of the first fluid on the stator assembly and the rotor assembly.

[0229] In some embodiments, the heat exchanger 161 includes an oil inlet pipe 1611 , an oil outlet pipe 1612 and a first connecting pipe 1613 ; the first connecting pipe 1613 is connected between the oil inlet pipe 1611 and the oil outlet pipe 1612 , and the first connecting pipe 1613 selectively connects the oil inlet pipe 1611 and the oil outlet pipe 1612 .

[0230] The oil outlet pipe 1612 is communicated with the oil inlet pipe 131 .

[0231] If the first fluid does not need to be cooled, the oil inlet pipe 1611 and the oil outlet pipe 1612 are connected through the first connecting pipe 1613; if the first fluid needs to be cooled, the oil inlet pipe 1611 and the oil outlet pipe 1612 are disconnected through the first connecting pipe 1613, and the first fluid enters the heat exchanger 161 for cooling.

[0232] The drive device provided in the embodiment of the present application can selectively connect the oil inlet pipe 1611 and the oil outlet pipe 1612 through the heat exchanger 161 including the oil inlet pipe 1611, the oil outlet pipe 1612 and the first connecting pipe 1613. When the temperature of the first fluid is high, the two can be controlled to be connected, so that the stator assembly and / or the rotor assembly can be effectively cooled. When the temperature of the first fluid is low, the two can be controlled to be disconnected, so that the first fluid can be kept warm, reducing the probability of the first fluid viscosity decreasing due to too low temperature, resulting in increased oil stirring loss.

[0233] In some embodiments, the supply device 160 further includes a first valve 162 , and the first valve 162 is configured to allow the first connecting pipe 1613 to selectively connect the oil inlet pipe 1611 and the oil outlet pipe 1612 .

[0234] The driving device provided in the embodiment of the present application can facilitate the step of selectively connecting the first connecting pipe 1613 to the oil inlet pipe 1611 and the oil outlet pipe 1612 by setting the first valve 162 .

[0235] In some embodiments, the supply device 160 further includes a first driving pump for driving the first fluid to be supplied to the oil inlet pipe 131 .

[0236] A driving device provided in an embodiment of the present application drives the flow of a first fluid through the provision of a first driving pump, thereby creating conditions for cooling.

[0237] In some embodiments, the heat exchanger 161 has a cooling channel for circulating a cooling medium therein, and the cooling channel can exchange heat with the first fluid to cool the first fluid.

[0238] A driving device provided in an embodiment of the present application makes the structure of the heat exchanger simple and easy to implement by setting a cooling channel for heat exchange with the first fluid.

[0239] In some embodiments, the driving device also includes a shell assembly, which is surrounded by the outer wall of the stator assembly, and a third flow channel 151 is formed inside the shell assembly. The supply device 160 also includes a liquid inlet pipe 163, a first liquid outlet pipe 164, a second liquid outlet pipe 166 and a second valve 165; the liquid inlet pipe 163 is connected to one end of the cooling flow channel, and the other end of the cooling flow channel is selectively connected to the first liquid outlet pipe 164 and the second liquid outlet pipe 166 through the second valve 165. The first liquid outlet pipe 164 is connected to the third flow channel 151, and the second liquid outlet pipe 166 is suitable for connecting to the water circulation system of the vehicle 10.

[0240] A driving device provided in an embodiment of the present application, through the above-mentioned configuration, the cooling medium flowing out of the cooling channel can directly return to the water circulation system of the vehicle 10, or enter the third channel 151 and the first fluid in the first channel for heat exchange, so as to cool the first fluid and also cool the stator body 111.

[0241] In some embodiments, the supply device 160 further includes a second driving pump for driving the cooling medium to flow.

[0242] A driving device provided in an embodiment of the present application can drive a cooling medium by setting a second driving pump, thereby enabling the cooling medium to circulate.

[0243] An embodiment of the present application provides a drive assembly, comprising any one of the above-mentioned drive devices.

[0244] A drive assembly provided in an embodiment of the present application can more efficiently control the heat exchange process in the drive device through the setting of the drive device, thereby improving the heat exchange capacity of the drive assembly and extending the service life of the drive assembly.

[0245] An embodiment of the present application provides a vehicle 10 comprising any one of the above-mentioned drive assemblies.

[0246] A vehicle 10 provided in an embodiment of the present application, through the setting of a drive assembly, the drive assembly includes a drive device, which can cool the stator component and the rotor component of the drive device, thereby improving the reliability of the operation of the vehicle 10.

[0247] A control method for a drive assembly provided in an embodiment of the present application includes: when the rotation speed of the rotor assembly meets a first predetermined condition, adjusting the opening of the first flow valve 140 .

[0248] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned setting, the opening of the first flow valve 140 can be adjusted under a first preset condition, thereby achieving efficient control of the first flow valve 140, thereby reducing the probability of an increase in the flow rate of the first fluid flowing into the rotor assembly due to negative pressure generated by the high rotational speed of the rotor assembly, thereby improving the cooling effect on the stator assembly.

[0249] In some embodiments, the first predetermined condition is that the rotation speed of the rotor assembly is greater than 10,000 RPM, or the first predetermined condition is that the rotation speed of the rotor assembly is greater than 20,000 rpm.

[0250] The embodiment of the present application provides a control method for a drive assembly. Through the above configuration, the first flow valve 140 can more accurately adjust the opening according to the state of the rotor assembly.

[0251] In some embodiments, if the rotational speed of the rotor assembly is greater than 0 and less than or equal to 20000RPM, the opening of the first flow valve 140 is controlled to be the first opening, and the flow of the rotor branch oil pipe 133 is the first flow; if the rotational speed of the rotor assembly is greater than 20000RPM and less than or equal to A, 23000RPM≤A≤27000RPM, the opening of the first flow valve 140 is controlled to be the second opening, and the flow of the rotor branch oil pipe 133 is the second flow; if the rotational speed of the rotor assembly is greater than A, the opening of the first flow valve 140 is controlled to be the third opening, and the flow of the rotor branch oil pipe 133 is the third flow, the third opening is greater than the first opening, the first opening is greater than the second opening, the third flow is greater than the second flow, and the second flow is greater than the first flow.

[0252] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned setting, the flow of the rotor branch oil pipe 133 is controlled by adjusting the opening of the first flow valve 140 to adapt to the working requirements of the rotor assembly at different speeds. The above-mentioned control strategy helps to improve the efficiency and reliability of the drive device.

[0253] In some embodiments, when the temperature information of the stator assembly meets a second predetermined condition, the opening degree of the first flow valve 140 is adjusted.

[0254] An embodiment of the present application provides a control method for a drive assembly. Through the above-mentioned flow control strategy based on the temperature of the stator component, by monitoring the temperature and dynamically adjusting the opening of the first flow valve 140 according to the second predetermined condition, the probability of safe and efficient operation of the drive device can be improved, which helps to improve the adaptability and reliability of the drive device.

[0255] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A driving device, characterized in that: include: stator assembly; A rotor assembly, movably inserted into the stator assembly; An oil circuit assembly (130) comprises an oil inlet pipe (131), a stator oil branch pipe (132) and a rotor oil branch pipe (133), wherein the stator oil branch pipe is connected between the stator assembly and the oil inlet pipe (131), and the rotor oil branch pipe (133) is connected between the rotor assembly and the oil inlet pipe (131); as well as a first flow valve (140), the first flow valve (140) being used to adjust the flow of the rotor oil branch pipe (133) to control the flow of the stator oil branch pipe; wherein the rotor assembly is capable of operating at a first speed and a second speed, the second speed being greater than the first speed; When the rotor assembly is at the first speed, the opening degree of the first flow valve (140) is a first opening degree, and the flow rate of the rotor oil branch pipe (133) is a first flow rate; When the rotor assembly is at the second speed, the opening degree of the first flow valve (140) is a second opening degree, and the flow rate of the rotor oil branch pipe (133) is a second flow rate; The first opening degree is greater than the second opening degree, and the second flow rate is greater than the first flow rate.

2. The driving device according to claim 1, characterized in that: The rotation speed of the rotor assembly is greater than or equal to 10000 RPM.

3. The driving device according to claim 1, characterized in that: The rotation speed of the rotor assembly is greater than or equal to 20000 RPM.

4. The driving device according to claim 1, characterized in that: The first rotation speed satisfies: greater than 0 and less than or equal to 20000RPM, and the second rotation speed satisfies: between 20000RPM and A, 23000RPM≤A≤27000RPM.

5. The driving device according to claim 4, characterized in that: The rotor assembly is capable of operating at a third speed, the third speed being greater than the second speed, and when the rotor assembly is at the third speed, the opening degree of the first flow valve (140) is a third opening degree, and the flow rate of the rotor branch oil pipe (133) is a third flow rate; The third flow rate is greater than the second flow rate, and the third opening degree is greater than the first opening degree.

6. The driving device according to claim 5, characterized in that: The third speed satisfies: A or above.

7. The driving device according to claim 1, characterized in that: The first flow valve (140) is installed on the rotor oil branch pipe (133) and / or the stator oil branch pipe (132).

8. The driving device according to claim 1, characterized in that: The first flow valve (140) comprises a proportional solenoid valve.

9. The driving device according to claim 1, characterized in that: The stator assembly comprises: A stator body (111), the stator body (111) is cylindrical, the stator body (111) has a plurality of first flow channels (A1), two ends of the first flow channels (A1) are respectively located at two ends of the stator body (111) along the axial direction (X), the stator oil branch pipe is connected to the first flow channel (A1), and the inner wall of the stator body (111) is provided with a plurality of protrusions (A2); and A winding is wound around the protruding portion (A2), and the winding is arranged to protrude from the stator body (111) along an axial direction (X) of the stator body (111).

10. The driving device according to claim 9, characterized in that: Each of the first flow channels (A1) extends along the axial direction (X) of the stator body (111).

11. The driving device according to claim 9, characterized in that: The stator oil branch pipe (132) comprises: A first sub-path (1321), one end of which is connected to one end of the first flow channel (A1); A second sub-path (1322), one end of which is connected to the other end of the first flow channel (A1); The connecting sub-path (1323) has a first port (H1), a second port (H2), and a third port (H3); the first port (H1) is connected to the oil inlet pipe (131); the second port (H2) is connected to the other end of the first sub-path (1321); and the third port (H3) is connected to the other end of the second sub-path (1322).

12. The driving device according to claim 11, characterized in that: The oil inlet pressure of the first sub-path (1321) is not equal to the oil inlet pressure of the second sub-path (1322).

13. The driving device according to claim 12, characterized in that: The stator oil branch pipe (132) further comprises a valve (1324), wherein the valve (1324) is installed in the second sub-path (1322) or the connecting sub-path (1323) between the second port (H2) and the third port (H3), so that the oil inlet pressure of the second sub-path (1322) is lower than the oil inlet pressure of the first sub-path (1321).

14. The driving device according to claim 9, characterized in that: The stator assembly further comprises an end cover assembly (112), wherein the end cover assembly (112) is connected to one end of the stator body (111) along the axial direction (X), the end cover assembly (112) comprises a chamber (C1), and the stator oil branch pipe is respectively connected to the plurality of first flow channels (A1) through the chamber (C1).

15. The driving device according to claim 14, characterized in that: The end cover assembly (112) comprises a liquid inlet hole (C2), the liquid inlet hole (C2) is in communication with the chamber (C1), and the stator branch oil pipe is in communication with the liquid inlet hole (C2).

16. The driving device according to claim 14, characterized in that: The end cover assembly (112) also has a liquid outlet hole (C3), and the liquid outlet hole (C3) is connected to the chamber (C1).

17. The driving device according to claim 14, characterized in that: A plurality of avoidance holes (C4) are provided on a side of the end cover assembly (112) close to the stator body (111), and the winding is at least partially inserted into the avoidance holes (C4) and extends into the chamber (C1).

18. The driving device according to claim 17, characterized in that: A sealing medium is filled between the winding and the avoidance hole (C4).

19. The driving device according to claim 17, characterized in that: The end cap assembly (112) comprises: A covering portion (1121); and A gasket (1122) is located between the covering portion (1121) and the stator body (111); the gasket (1122) and the covering portion (1121) enclose the chamber (C1); the gasket (1122) is provided with the avoidance hole (C4); the gasket (1122) is covered on one end of the stator body (111); and the first flow channel (A1) is opened in a region of the end surface of the stator body (111) that is not covered by the gasket (1122).

20. The driving device according to claim 1, characterized in that The rotor assembly comprises a second flow channel (121), and the rotor oil branch pipe (133) is in communication with the second flow channel (121).

21. The driving device according to claim 20, characterized in that: The rotor assembly comprises a rotor shaft and a rotating part, the rotor shaft extends along the axial direction (X) of the stator assembly, the rotating part is sleeved on the rotor shaft, and the second flow channel (121) comprises: A first sub-flow channel (1211) is arranged on the rotor shaft, and the first sub-flow channel (1211) is in communication with the rotor oil branch pipe (133); a second sub-flow channel (1212), arranged on the rotating part, the second sub-flow channel (1212) extending in a radial direction of the rotating part; The third sub-channel (1213) is arranged on the rotating part, the third sub-channel (1213) extends along the axial direction (X), and the second sub-channel (1212) is respectively connected to the first sub-channel (1211) and the third sub-channel (1213).

22. The driving device according to claim 21, characterized in that The first sub-channel (1211) extends along the axial direction (X), and the first sub-channel (1211) has a first end and a second end; The number of the second sub-flow channels (1212) is plural, a portion of the second sub-flow channels (1212) is connected to the first end, and another portion of the second sub-flow channels (1212) is connected to the second end.

23. The driving device according to claim 21, characterized in that There are multiple third sub-flow channels (1213), and the multiple third sub-flow channels (1213) are correspondingly connected to the multiple second sub-flow channels (1212); Each of the third sub-flow channels (1213) comprises a plurality of branch flow channels extending along the axial direction (X), and the plurality of branch flow channels are arranged at intervals along the circumferential direction of the rotor shaft; Each of the second sub-flow channels (1212) is connected to a plurality of the branch flow channels in the corresponding third sub-flow channel (1213).

24. The driving device according to claim 21, characterized in that The third sub-flow channel (1213) has an oil-swinging port (Q1) located at an axial end of the rotating part. In the radial direction of the rotating part, the oil-swinging port (Q1) is arranged corresponding to the stator assembly to discharge oil toward the stator assembly.

25. The driving device according to claim 1, characterized in that The driving device has a third flow channel (151), and the third flow channel (151) is used for heat exchange with the outer wall of the stator assembly.

26. The driving device according to claim 25, characterized in that The driving device comprises a housing component, the housing component is arranged around the outer wall of the stator component, and the third flow channel (151) is formed inside the housing component.

27. The driving device according to claim 26, characterized in that Both ends of the third flow channel (151) are located on a side of the shell component away from the outer wall.

28. The driving device according to claim 25, characterized in that The third flow channel (151) comprises: A first portion (1511) is extended along the axial direction (X) of the stator assembly; The second part (1512) comprises a plurality of sub-parts extending along the circumference of the stator assembly and arranged in sequence along the axial direction (X), each adjacent sub-part is connected to each other end to end, and one of the sub-parts located at the two ends of the axial direction (X) is connected to the first part (1511), so that the first part (1511) and the second part (1512) are connected to form the third flow channel (151).

29. The driving device according to claim 1, characterized in that Also includes: The supply device (160) is connected to the oil inlet pipe (131) of the oil circuit assembly (130), and the supply device (160) is capable of supplying a first fluid to the oil inlet pipe (131).

30. The driving device according to claim 29, characterized in that The supply device (160) comprises a heat exchanger (161) for cooling the first fluid supplied to the oil inlet pipe (131).

31. The driving device according to claim 30, characterized in that The heat exchanger (161) comprises an oil inlet pipe (1611), an oil outlet pipe (1612), and a first connecting pipe (1613); the first connecting pipe (1613) is connected between the oil inlet pipe (1611) and the oil outlet pipe (1612), and the first connecting pipe (1613) selectively connects the oil inlet pipe (1611) and the oil outlet pipe (1612).

32. The driving device according to claim 31, characterized in that The supply device (160) further comprises a first valve (162), wherein the first valve (162) is configured to enable the first connecting pipe (1613) to selectively connect the oil inlet pipe (1611) and the oil outlet pipe (1612).

33. A driving device according to any one of claims 29 to 32, characterized in that: The supply device (160) further comprises a first driving pump, which is used to drive the first fluid to be supplied to the oil inlet pipe (131).

34. The driving device according to claim 30, characterized in that The heat exchanger (161) has a cooling channel inside for circulating a cooling medium, and the cooling channel can exchange heat with the first fluid to cool the first fluid.

35. The driving device according to claim 34, characterized in that The driving device further comprises a housing component, the housing component is arranged around the outer wall of the stator component, and a third flow channel (151) is formed inside the housing component; The supply device (160) further comprises a liquid inlet pipe (163), a first liquid outlet pipe (164), a second liquid outlet pipe (166) and a second valve (165); the liquid inlet pipe (163) is connected to one end of the cooling channel, and the other end of the cooling channel is selectively connected to the first liquid outlet pipe (164) and the second liquid outlet pipe (166) through the second valve (1324); the first liquid outlet pipe (164) is connected to the third channel (151), and the second liquid outlet pipe (166) is suitable for connecting to a water circulation system of the vehicle (10).

36. The driving device according to claim 34 or 35, characterized in that The supply device (160) also includes a second driving pump, which is used to drive the cooling medium to flow.

37. A drive assembly, characterized in that: A drive device comprising any one of claims 1 to 36.

38. A vehicle (10), characterized in that Comprising the drive assembly of claim 37.

39. A control method for a driving device, characterized in that: For the drive device according to any one of claims 1 to 36, the control method comprises: When the rotation speed of the rotor assembly meets a first predetermined condition, the opening of the first flow valve (140) is adjusted.

40. The control method according to claim 39, characterized in that: The first predetermined condition is that the rotation speed of the rotor assembly is greater than 10000 RPM, or the first predetermined condition is that the rotation speed of the rotor assembly is greater than 20000 RPM.

41. The control method according to claim 40, characterized in that: If the rotation speed of the rotor assembly is greater than 0 and less than or equal to 20000 RPM, the opening of the first flow valve (140) is controlled to be a first opening, and the flow rate of the rotor oil branch pipe (133) is a first flow rate; If the rotation speed of the rotor assembly is greater than 20000 RPM and less than or equal to A, 23000 RPM≤A≤27000 RPM, the opening of the first flow valve (140) is controlled to be a second opening, and the flow rate of the rotor oil branch pipe (133) is a second flow rate; If the rotation speed of the rotor assembly is greater than A, the opening of the first flow valve (140) is controlled to be a third opening, and the flow rate of the rotor oil branch pipe (133) is a third flow rate, The third opening degree is greater than the first opening degree, the first opening degree is greater than the second opening degree, the third flow rate is greater than the second flow rate, and the second flow rate is greater than the first flow rate.

42. The control method according to claim 40, characterized in that: When the temperature information of the stator assembly meets a second predetermined condition, the opening degree of the first flow valve (140) is adjusted.

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