Power assembly shunting through direct-connection flow channel and electric vehicle

Abstract

The invention provides a power assembly shunting through a direct-connection runner and an electric vehicle. A shell of the power assembly comprises a motor containing cavity, a speed reducer containing cavity, a flow channel inlet and a plurality of flow channel outlets, one motor containing cavity is used for containing a stator and a rotor of one motor, and one speed reducer containing cavity is used for containing a gear and a bearing of a speed reducer. One flow channel inlet is used for conveying cooling liquid to the multiple flow channel outlets through the same transmission flow channel, and two flow channel outlets in the multiple flow channel outlets are used for conveying the cooling liquid to one motor containing cavity and one speed reducer containing cavity correspondingly; an outlet of one oil pump is used for conveying cooling liquid to one flow channel inlet through one heat exchanger and one direct connection flow channel, and one valve is used for adjusting the flow of the cooling liquid conveyed to one flow channel inlet from at least one of one heat exchanger and one direct connection flow channel. The working temperature of the cooling liquid can be adjusted to improve the working performance of the power assembly and prolong the service life of the power assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power assembly, and particularly relates to a power assembly with straight connection flow channel and an electric vehicle. BACKGROUND

[0002] The power assembly transports cooling liquid through a transmission flow channel to dissipate heat for each motor or lubricate gears or bearings of a transmission mechanism, which is one of key factors to ensure the working performance and service life of the power assembly. The working temperature of the cooling liquid will affect the heat dissipation effect of the cooling liquid on the motor and the lubrication effect of the cooling liquid on the transmission mechanism. However, the working temperature of the cooling liquid in the power assembly is difficult to be adaptively adjusted according to different working conditions of the power assembly, thereby reducing the working performance and service life of the power assembly. SUMMARY

[0003] The present application provides a power assembly with straight connection flow channel, which can adaptively adjust the working temperature of the cooling liquid according to different working conditions of the power assembly by optimizing the structural design of the flow channel in the power assembly, thereby improving the working performance and service life of the power assembly. The present application also provides an electric vehicle. The present application specifically includes the following technical solutions.

[0004] In a first aspect, the present application provides a power assembly with straight connection flow channel, a housing of the power assembly includes an electric motor accommodating cavity, a reducer accommodating cavity, a flow channel inlet and a plurality of flow channel outlets, the electric motor accommodating cavity is used for accommodating a stator and a rotor of an electric motor, the reducer accommodating cavity is used for accommodating gears and bearings of a reducer, the flow channel inlet is used for transporting cooling liquid to the plurality of flow channel outlets through a same transmission flow channel, two flow channel outlets of the plurality of flow channel outlets are used for respectively transporting cooling liquid to the electric motor accommodating cavity and the reducer accommodating cavity, an outlet of an oil pump is used for transporting cooling liquid to the flow channel inlet through a heat exchanger and a straight connection flow channel, and a valve is used for adjusting the flow of the cooling liquid transported to the flow channel inlet by at least one of the heat exchanger and the straight connection flow channel.

[0005] The shell of the power assembly of the application is integrated with a motor accommodating cavity and a reducer accommodating cavity for respectively accommodating a motor and a reducer of the power assembly and for fixing and protecting the motor and the reducer, so that the motor and the reducer can work normally and the working performance and service life of the motor and the reducer can be improved. A flow passage inlet and a plurality of flow passage outlets are formed on the shell, and the flow passage inlet and the plurality of flow passage outlets are communicated through a transmission flow passage, so that the external oil can be transported from the flow passage inlet into the transmission flow passage, and the coolant in the transmission flow passage is output through each flow passage outlet. Among them, two flow passage outlets of the plurality of flow passage outlets are respectively arranged on the inner wall of the motor accommodating cavity and the inner wall of the reducer accommodating cavity, so that the transmission flow passage can transport the coolant into the motor accommodating cavity and the reducer accommodating cavity through the two flow passage outlets respectively, and then the coolant can be transported to cool the stator and rotor of the motor and lubricate at least one of the gear and the bearing in the reducer, thereby improving the working performance and service life in the power assembly.

[0006] The coolant output from the outlet of the oil pump of the power assembly is transported into a heat exchanger and a direct connection flow passage respectively, and the coolant output from the heat exchanger and the direct connection flow passage is transported into a flow passage inlet, so that the coolant output from the heat exchanger and the direct connection flow passage can be transported into the motor accommodating cavity and the reducer accommodating cavity through a transmission flow passage. Among them, the coolant from the outlet of the oil pump can be transported into the heat exchanger and the direct connection flow passage respectively, and the coolant output from the heat exchanger and the direct connection flow passage can be transported from the flow passage inlet into the same transmission flow passage. Since the heat exchanger can exchange heat with the coolant to reduce the temperature of the coolant, adjusting the flow of the coolant transported into the flow passage inlet by the heat exchanger and the direct connection flow passage respectively through a valve can adjust the temperature of the coolant transported into the flow passage inlet by the heat exchanger and the direct connection flow passage respectively. It can be understood that the valve adjusts the flow of the coolant transported into the heat exchanger and the direct connection flow passage respectively according to different working conditions of the power assembly, which can realize dynamic adjustment of the temperature of the coolant, thereby ensuring that the coolant can effectively cool the stator and rotor of the motor and effectively lubricate the gear and bearing of the reducer when the power assembly works under different working conditions, improving the adaptability of the power assembly to different working conditions, and further improving the working performance and service life of the power assembly. At the same time, the direct connection flow passage, the heat exchanger and the valve work together to realize dynamic adjustment of the temperature of the coolant transported into the transmission flow passage, and the internal structure of the shell can be reused to simplify the structural design of the shell.

[0007] One implementation, a direct flow channel includes a direct flow channel inlet and a direct flow channel outlet, a direct flow channel inlet is used to receive cooling liquid and is used to deliver cooling liquid to a direct flow channel outlet, wherein a direct flow channel inlet is used to deliver cooling liquid to a direct flow channel outlet through a valve.

[0008] Correspondingly, a direct flow channel is arranged on one side of a heat exchanger, and a valve is connected in series with a direct flow channel and located on one side of a heat exchanger, thereby achieving the adjustment of the flow of cooling liquid delivered to a heat exchanger and a direct flow channel through a valve, while reducing the structural size of the shell along the direction in which the oil pump outputs cooling liquid flow, and arranging a valve in the space of the shell using a direct flow channel to reduce the structural size of the shell along the direction in which a heat exchanger and a direct flow channel are arranged. That is, by arranging a valve in series with a direct flow channel, the internal structure design and overall structural size of the shell can be simplified, and the overall miniaturization design of the power assembly can be achieved.

[0009] One implementation, an outlet of an oil pump is used to deliver cooling liquid to an inlet of a heat exchanger and a direct flow channel inlet, respectively, and an outlet of a heat exchanger and a direct flow channel outlet are used to deliver cooling liquid to a flow channel inlet simultaneously.

[0010] Correspondingly, the outlet of an oil pump is in communication with the inlet of a heat exchanger and the inlet of a direct flow channel simultaneously, and a flow channel inlet is in communication with the outlet of a heat exchanger and the outlet of a direct flow channel, so that a direct flow channel and a heat exchanger form a parallel connection. When a valve adjusts the opening degree of the valve, the flow of cooling liquid delivered to the inlet of a heat exchanger and the inlet of a direct flow channel can be adjusted simultaneously, thereby achieving the effect of dynamically adjusting the temperature of cooling liquid in a transmission flow channel. At the same time, a heat exchanger and a direct flow channel are arranged in parallel, and only one valve is needed to adjust the flow of cooling liquid of the inlet of a heat exchanger and the inlet of a direct flow channel in parallel, thereby achieving the simplification of the internal structure of the power assembly.

[0011] One implementation, along the direction of cooling liquid flow in a direct flow channel, the flow distance of cooling liquid in a direct flow channel is greater than the interval between the inlet of a heat exchanger and the outlet of a heat exchanger, wherein the interval between a direct flow channel inlet and the outlet of an oil pump is less than the interval between the inlet of a heat exchanger and the outlet of an oil pump, and the interval between a direct flow channel outlet and a flow channel inlet is less than the interval between the outlet of a heat exchanger and a flow channel inlet.

[0012] Correspondingly, along the flow direction of the cooling liquid, one direct flow channel inlet is located between the outlet of one oil pump and the inlet of one heat exchanger, so that the cooling liquid output by the outlet of one oil pump can be first delivered into one direct flow channel inlet, thereby improving the effect of the valve on the flow of the cooling liquid delivered into one direct flow channel. Meanwhile, along the flow direction of the cooling liquid, one direct flow channel outlet is located between the outlet of one heat exchanger and one flow channel inlet, so that the cooling liquid output by one direct flow channel outlet is delivered into one flow channel inlet earlier than the cooling liquid output from the outlet of one heat exchanger, thereby reducing the influence of the temperature of the cooling liquid output from the outlet of one heat exchanger on the temperature of the cooling liquid output by one direct flow channel outlet, so as to improve the adjustment performance and temperature maintaining effect of the temperature of the cooling liquid delivered into one flow channel inlet.

[0013] One implementation manner is that the aperture of one direct flow channel is greater than the aperture of the inlet of one heat exchanger.

[0014] Correspondingly, since the greater the aperture, the smaller the flow resistance of the cooling liquid, the aperture of one direct flow channel is greater than the aperture of the inlet of one heat exchanger, so that the cooling liquid output by the outlet of one oil pump can be more easily delivered from the inlet of one direct flow channel into one direct flow channel, thereby avoiding the increase of the flow resistance of the cooling liquid due to the excessive bending of the flow path of one direct flow channel, and further improving the adjustment accuracy of the valve on the flow of the cooling liquid delivered into one heat exchanger and one direct flow channel, that is, further improving the accuracy of the valve on the temperature of the cooling liquid inside the powertrain assembly, and improving the adjustment sensitivity of the valve on the temperature of the cooling liquid.

[0015] One implementation manner is that one flow channel outlet is used for delivering the cooling liquid into one motor accommodating cavity, and the other flow channel outlet is used for delivering the cooling liquid into one speed reducer accommodating cavity, wherein, along the flow direction of the cooling liquid, the flow distance of the cooling liquid from one flow channel inlet to one flow channel outlet is less than the flow distance of the cooling liquid from one flow channel inlet to the other flow channel outlet.

[0016] Correspondingly, along the direction of the flow of the cooling liquid, the cooling liquid input from one flow channel inlet firstly flows into one flow channel outlet, and then flows into another flow channel outlet, so that the cooling liquid input from one flow channel inlet is firstly delivered into one motor accommodating cavity to dissipate heat for the stator and rotor of one motor, and then delivered into one speed reducer accommodating cavity to lubricate one gear or one bearing of one speed reducer. At the same time, the cooling liquid in one transmission flow channel is firstly delivered into one motor accommodating cavity, and then delivered into one speed reducer accommodating cavity, so that the stator and rotor of one motor accommodated in one motor accommodating cavity can heat the cooling liquid input from one flow channel outlet, so that the cooling liquid with a higher temperature is circulated in the power assembly first to improve the overall temperature of the cooling liquid in the power assembly, thereby improving the cooling liquid temperature rising efficiency, and improving the lubrication effect and efficiency when the cooling liquid is delivered into one speed reducer accommodating cavity through another flow channel outlet to lubricate one gear and one bearing of one speed reducer, and reducing the oil stirring loss of the gear shaft system of one speed reducer.

[0017] One implementation, the aperture of one flow channel outlet is smaller than the aperture of another flow channel outlet.

[0018] Correspondingly, the apertures of the two flow channel outlets are designed differently, so that the flow resistance of the cooling liquid of the two flow channel outlets is differentially adjusted, and the flow of the cooling liquid of the two flow channel outlets can be adaptively distributed. Specifically, by setting the aperture of one flow channel outlet for delivering the cooling liquid into one motor accommodating cavity to be smaller than the aperture of another flow channel outlet for delivering the cooling liquid into one speed reducer accommodating cavity, the flow resistance of the cooling liquid of one flow channel outlet is smaller than that of another flow channel outlet, so that the cooling liquid delivered from one flow channel inlet can be more easily delivered into another flow channel outlet, and the cooling liquid can be more distributed to another flow channel outlet. That is, by differentially setting the apertures of the two flow channel outlets, the flow of the cooling liquid delivered by one transmission flow channel into one motor accommodating cavity and one speed reducer accommodating cavity can be adaptively adjusted according to the different heat dissipation requirements of one motor and the different lubrication requirements of one speed reducer, so as to ensure the heat dissipation effect of the cooling liquid on the stator and rotor of one motor, and improve the lubrication effect of the cooling liquid on one speed reducer.

[0019] One implementation, the housing of the power assembly further comprises one generator accommodating cavity for accommodating the stator and rotor of one generator, and one or more of the plurality of flow channel outlets are used to deliver the cooling liquid into one generator accommodating cavity, wherein, along the direction of the flow of the cooling liquid, the flow distance of the cooling liquid from one flow channel inlet to two flow channel outlets is smaller than the flow distance of the cooling liquid from one flow channel inlet to one or more flow channel outlets.

[0020] Correspondingly, one or more of the flow channel outlets is communicated to one generator accommodating cavity, so that one transmission flow channel can deliver cooling liquid to one generator accommodating cavity to dissipate heat from the stator and rotor of one generator in one generator accommodating cavity. Meanwhile, one flow channel inlet delivers cooling liquid to one or more of the flow channel outlets through the same transmission flow channel, without the need to separately arrange a transmission flow channel to deliver cooling liquid to one generator accommodating cavity, so as to simplify the internal structure of the power assembly. In the direction of the flow of the cooling liquid, the cooling liquid is first delivered to one motor side and then to one engine side. That is, the cooling liquid is first delivered to one motor accommodating cavity and one reducer accommodating cavity and then to one generator accommodating cavity. According to the different needs of one motor, one reducer and one generator for cooling liquid, the order of delivery of the cooling liquid to one motor accommodating cavity, one reducer accommodating cavity and one generator accommodating cavity is adaptively adjusted, so as to improve the heat dissipation or lubrication efficiency of the cooling liquid on the functional structures in the power assembly.

[0021] In one implementation, one valve is used to reduce the flow of cooling liquid flowing into one flow channel inlet through one direct connection flow channel and increase the flow of cooling liquid flowing into one flow channel inlet from one heat exchanger, and increase the flow of cooling liquid flowing into one flow channel inlet through one direct connection flow channel and reduce the flow of cooling liquid flowing into one flow channel inlet from one heat exchanger, when the rotational speed of one oil pump remains unchanged.

[0022] Correspondingly, the rotational speed of one oil pump remains unchanged, i.e., the flow of cooling liquid output from the outlet of one oil pump is fixed, so that one valve synchronously adjusts the flow of cooling liquid in one heat exchanger and one direct connection flow channel when adjusting the opening degree of one valve. Specifically, one valve is used to reduce the flow of cooling liquid in one heat exchanger while increasing the flow of cooling liquid in one direct connection flow channel. Or, one valve is used to increase the flow of cooling liquid in one heat exchanger while reducing the flow of cooling liquid in one direct connection flow channel. It can be understood that one valve adjusts the increase of the flow of cooling liquid in one heat exchanger, which can reduce the temperature of the cooling liquid. One valve adjusts the increase of the flow of cooling liquid in one direct connection flow channel, which can increase the temperature of the cooling liquid. By one valve adjusting the flow of cooling liquid in one heat exchanger and one direct connection flow channel when the rotational speed of one oil pump remains unchanged, the function of adjusting the temperature of the cooling liquid delivered into one flow channel inlet can be realized, and then the temperature of the cooling liquid in the power assembly is adjusted, so that the cooling liquid works in an appropriate temperature state to improve the working performance of the cooling liquid.

[0023] One valve adjusts the opening degree of one valve, wherein the opening degree of one valve is increased, and the flow of cooling liquid flowing into the inlet of one flow channel from one heat exchanger is reduced, and the flow of cooling liquid flowing into the inlet of one flow channel from one direct connection flow channel is increased, and the opening degree of one valve is decreased, and the flow of cooling liquid flowing into the inlet of one flow channel from one heat exchanger is increased, and the flow of cooling liquid flowing into the inlet of one flow channel from one direct connection flow channel is reduced.

[0024] Correspondingly, the opening degree of one valve is increased, and the flow of cooling liquid flowing into the inlet of one flow channel from one heat exchanger is reduced, and the flow of cooling liquid flowing into the inlet of one flow channel from one direct connection flow channel is increased, and the opening degree of one valve is decreased, and the flow of cooling liquid flowing into the inlet of one flow channel from one heat exchanger is increased, and the flow of cooling liquid flowing into the inlet of one flow channel from one direct connection flow channel is reduced.

[0025] One valve is used to adjust the opening degree of one valve according to at least one of the temperature of cooling liquid in the motor accommodating cavity and the temperature of cooling liquid in the reducer accommodating cavity, wherein when the temperature of cooling liquid in the reducer accommodating cavity is less than a first preset temperature value, one valve adjusts the opening degree of one valve to be greater than a first opening degree, when the temperature of cooling liquid in the motor accommodating cavity is greater than a second preset temperature value, one valve adjusts the opening degree of one valve to be less than a second opening degree, and the second opening degree is less than the first opening degree, when at least one of the temperature of the stator or the rotor of one motor is greater than a third preset temperature value, the third preset temperature value is greater than the second preset temperature value, and one oil pump adjusts the opening degree of one valve to be kept at a third opening degree by one valve to deliver cooling liquid into one heat exchanger, and the third opening degree is less than the second opening degree.

[0026] Correspondingly, when the temperature of the cooling liquid in the reducer accommodating cavity is too low, a valve can increase the flow of the cooling liquid directly conveyed to the inlet of the flow channel through the straight connection flow channel and reduce the cooling liquid in the heat exchanger for heat exchange by increasing the opening degree of the valve, so as to increase the temperature of the cooling liquid, thereby improving the lubricating effect of the cooling liquid and reducing the oil stirring loss of the cooling liquid in the reducer. When the heat generated by at least one of the stator and the rotor of the motor is high, causing the temperature of the cooling liquid in the motor accommodating cavity to be too high, a valve can increase the cooling liquid in the heat exchanger for heat exchange and reduce the cooling liquid directly conveyed from the straight connection flow channel to the inlet of the flow channel, thereby quickly reducing the temperature of the cooling liquid. After the cooling liquid with reduced temperature is conveyed to the motor accommodating cavity through the transmission flow channel, the heat dissipation effect of the rotor and the stator of the motor is improved, thereby improving the working performance and service life of the rotor and the stator of the motor. At the same time, when the temperature of the cooling liquid in the motor accommodating cavity is too high, further reducing the opening degree of the valve through the valve can increase the cooling liquid input into the heat exchanger for heat exchange, so as to further improve the cooling efficiency of the cooling liquid and further reduce the temperature of the cooling liquid.

[0027] In an implementation, the power assembly further comprises at least one filter, and the cooling liquid output from the outlet of the oil pump flows through the at least one filter before being conveyed to the inlet of the flow channel through the straight connection flow channel and the heat exchanger.

[0028] Correspondingly, the at least one filter is used to filter impurities or foreign matters that may be mixed into the cooling liquid to improve the cleanliness of the cooling liquid. By adding the at least one filter between the outlet of the oil pump and the inlet of the flow channel along the flow direction of the cooling liquid, the cooling liquid output from the outlet of the oil pump is filtered by the at least one filter before being conveyed to the inlet of the flow channel, so that dust, abrasive particles and other impurities or foreign matters that may be mixed into the cooling liquid are filtered to improve the cleanliness of the cooling liquid, which can ensure that the impurities or foreign matters that may be mixed into the cooling liquid do not damage the transmission mechanism of the generator side or the motor side when the cooling liquid lubricates the generator side or the motor side, thereby reducing the working performance or transmission efficiency of the transmission mechanism. That is, the cooling liquid output from the oil pump flows through the at least one filter before being conveyed to the engine side or the motor side for lubrication or heat dissipation, which can further improve the working performance and service life of the power assembly.

[0029] In a second aspect, the application further provides an electric vehicle, which comprises a power battery, wheels and the power assembly provided by any one of the implementation manners, and the power battery is used to provide power to the motor of the power assembly and drive the wheels through the motor.

[0030] The electric vehicle provided by the application provides electric energy to an electric motor through a power battery, so that an electric motor rotates and can output power externally. The electric motor of the power assembly transmits power to the wheels through a speed reducer, which can realize the effect of driving the wheels to rotate and driving the electric vehicle to run. The electric vehicle of the application is equipped with the power assembly in any of the implementation manners, which can improve the working performance and service life of the electric vehicle of the application. That is, because the power assembly in any of the implementation manners is used, the electric vehicle of the application has all the beneficial effects that the power assembly in any of the implementation manners can have. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0032] Figure 1 The working scene schematic diagram of the electric vehicle provided by the embodiment of the application is shown in the figure.

[0033] Figure 2 The plane structure schematic diagram of the power assembly of the electric vehicle provided by the embodiment of the application is shown in the figure.

[0034] Figure 3 The plane structure schematic diagram of the power assembly of the electric vehicle provided by the embodiment of the application is shown in the figure.

[0035] Figure 4 The plane structure schematic diagram of the power assembly of the electric vehicle provided by the embodiment of the application is shown in the figure.

[0036] Figure 5 The working principle schematic diagram of the valve of the power assembly provided by the embodiment of the application is shown in the figure.

[0037] Figure 6 The partial plane result schematic diagram of the power assembly provided by the embodiment of the application is shown in the figure.

[0038] Figure 7 The partial plane result schematic diagram of the power assembly provided by the embodiment of the application is shown in the figure.

[0039] Figure 8 The partial plane result schematic diagram of the power assembly provided by the embodiment of the application is shown in the figure.

[0040] Figure 9 The working principle schematic diagram of the valve of the power assembly provided by the embodiment of the application is shown in the figure.

[0041] Figure 10 A partial planar view of an electric vehicle provided by an embodiment of the present application;

[0042] Figure 11 A partial planar view of a direct connection flow channel and a heat exchanger of a power assembly provided by an embodiment of the present application;

[0043] Figure 12 A planar view of a transmission flow channel conveying cooling liquid of a power assembly provided by an embodiment of the present application. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0045] The present application provides a power assembly with a direct connection flow channel. The housing of the power assembly includes a motor accommodating cavity, a reducer accommodating cavity, a flow channel inlet, and a plurality of flow channel outlets. The motor accommodating cavity is used to accommodate the stator and rotor of a motor. The reducer accommodating cavity is used to accommodate the gear and bearing of a reducer. The flow channel inlet is used to convey cooling liquid to the plurality of flow channel outlets through a transmission flow channel. Two flow channel outlets of the plurality of flow channel outlets are used to convey cooling liquid to the motor accommodating cavity and the reducer accommodating cavity, respectively. The outlet of an oil pump is used to convey cooling liquid to the flow channel inlet through a heat exchanger and a direct connection flow channel, respectively. A valve is used to adjust the flow of cooling liquid conveyed to the flow channel inlet by at least one of the heat exchanger and the direct connection flow channel. The power assembly of the present application can adaptively adjust the working temperature of the cooling liquid according to different working conditions of the power assembly by optimizing the structure design of the flow channel inside the power assembly, thereby improving the working performance and service life of the power assembly.

[0046] The present application provides an electric vehicle. The electric vehicle includes a power battery, a wheel, and the power assembly provided by the above-mentioned implementation. The power battery is used to provide power to a motor of the power assembly and drive the wheel through the motor. The power assembly carried by the electric vehicle of the present application can adaptively adjust the working temperature of the cooling liquid according to different working conditions of the power assembly by adjusting the distribution of the flow of the cooling liquid in a heat exchanger and a direct connection flow channel, thereby improving the overall working performance and service life of the electric vehicle.

[0047] Please refer to Figure 1 and Figure 2 , Figure 1A working scenario of the electric vehicle 1000 is shown in the embodiments provided in the present application, Figure 2 A planar structure of the power assembly 100 of the electric vehicle 1000 is shown in the embodiments provided in the present application. The electric vehicle 1000 comprises wheels 1001, a power battery 1002 and a power assembly 100. The power battery 1002 is electrically connected with each functional structural member inside the electric vehicle 1000, and the power battery 1002 can supply power for the normal work of each functional structural member inside the electric vehicle 1000. The power assembly 100 is used to receive the electric energy provided by the power battery 1002, and is used to provide power to drive the wheels 1001 of the electric vehicle 1000.

[0048] In the embodiments shown in Figure 1 and Figure 2 , the wheels 1001 are rotationally connected to the vehicle body of the electric vehicle 1000, and each wheel 1001 rotates to drive the vehicle frame of the electric vehicle 1000 to travel. The power assembly 100 is fixedly connected to the vehicle body of the electric vehicle 1000, and is in transmission connection with the wheels 1001 of the electric vehicle 1000. The power battery 1002 supplies power to the power assembly 100, and the power assembly 100 outputs power to the wheel end to drive the wheels 1001 to rotate.

[0049] It can be understood that the power assembly 100 of the electric vehicle 1000 is in transmission connection with the wheels 1001 through a speed reducer, so that the power output by the electric motor in the power assembly 100 is transmitted to the speed reducer and then transmitted to the wheels 1001 through the speed reducer, so as to achieve the effect of driving the wheels 1001 to rotate and then driving the electric vehicle 1000 to travel.

[0050] For example, the power assembly 100 comprises at least one of a speed reducer 101, a generator 102 and an electric motor 103. In the embodiments shown in Figure 1 and Figure 2 , the power assembly 100 comprises the speed reducer 101, the generator 102 and the electric motor 103.

[0051] In one embodiment, the electric motor 103 and the speed reducer 101 are in transmission connection. The electric motor 103 is used to generate driving torque and serve as a power source of the power assembly 100 to output power, and the electric motor 103 transmits the output power to the wheels 1001 through the speed reducer 101 to drive the electric vehicle 1000 to travel. Specifically, the electric motor 103 comprises a stator 1031, a rotor 1032 and a motor shaft 1033, the stator 1031 is coaxially sleeved on the periphery of the rotor 1032 and is fixed relative to the housing of the electric motor 103, the motor shaft 1033 of the electric motor 103 is coaxially fixed to the rotor 1032, the rotor 1032 rotates around its own axis and synchronously drives the motor shaft 1033 to rotate to output power through the motor shaft 1033.

[0052] One embodiment, the speed reducer 101 includes a plurality of gears 1011 and a plurality of rotating shafts 1012, the plurality of rotating shafts 1012 are parallel and spaced apart. The plurality of gears 1011 are used to achieve the transmission connection between the plurality of rotating shafts 1012, so as to be able to transmit the power input by the motor 103 and output to the wheels 1001.

[0053] It should be noted that, in the embodiments shown in Figure 1 and Figure 2 , a transmission mechanism for achieving other functions can also be provided between the speed reducer 101 and the wheels 1001 of the electric vehicle 1000, for example but not limited to a differential mechanism, so as to achieve different power transmission effects between the speed reducer 101 and the wheels 1001, so as to meet different driving states and requirements of the electric vehicle 1000.

[0054] One embodiment, the motor 103 and the generator 102 are simultaneously electrically connected with the power battery 1002. For example, the generator 102 is used to convert kinetic energy into electrical energy. The electrical energy generated by the generator 102 is input into the power battery 1002 for storage, so as to achieve the effect of charging the power battery 1002 by the generator 102. The power battery 1002 is used to transmit electrical energy to the motor 103, and the electrical energy is converted into kinetic energy by the motor 103, and the kinetic energy is transmitted to the wheels 1001 by the motor 103 through the speed reducer 101.

[0055] One embodiment, the electric vehicle 1000 can also include an engine 1003, and the engine 1003 is in transmission connection with the generator 102. The engine 1003 is used to provide power and transmit the power to the generator 102 through the transmission mechanism between the engine 1003 and the generator 102, so as to convert the kinetic energy into electrical energy by the generator 102. In Figure 1 and Figure 2 , the engine 1003 can but not limited to include gasoline engines, diesel engines and other types or fuel engines.

[0056] One embodiment, the electric vehicle 1000 further includes a controller 1004, and the controller 1004 is electrically connected with the power battery 1002, the motor 103 and the generator 102 respectively. The controller 1004 is used to control the cooperative work between the power battery 1002, the motor 103 and the generator 102, so as to make the electric vehicle 1000 normally drive and work in different power modes.

[0057] It can be understood that, in the power assembly 100 provided in the embodiment of the present application, the power assembly 100 is used for providing electric energy to the power battery 1002 of the electric vehicle 1000 through the generator 102, and driving the motor shaft 1033 of the electric motor 103 to rotate through the power battery 1002 to be able to input power to the transmission mechanism in the power assembly 100 which is in transmission connection with the electric motor 103. The power output by the electric motor 103 is output to the outside of the power assembly through the transmission mechanism in the power assembly 100 which is in transmission connection with the electric motor 103, thereby achieving the effect of outputting power from the power assembly 100 to the outside, and being used for realizing the function of driving the electric vehicle 1000 to move.

[0058] It should be noted that, in the embodiments shown in Figure 1 and Figure 2 , only a possible functional structure and a possible structure shape, size and arrangement position of each functional structure provided in the electric vehicle 1000 and the power assembly 100 are exemplarily introduced, but the functional structure and the structure shape, size and arrangement position of each functional structure provided in the electric vehicle 1000 are not limited to this, and the functional structure and the structure shape, size and arrangement position of each functional structure provided in the power assembly 100 are not limited to this. In other embodiments of the present application, the functional structure and the structure shape, size and arrangement position of each functional structure in the electric vehicle 1000 and the power assembly 100 can be adjusted according to actual design requirements and application scenarios, and the embodiments of the present application do not make specific limitations on this.

[0059] Please refer to Figure 3 , Figure 3 for the planar structure schematic diagram of the transmission flow channel 20 of the power assembly 100 provided in the embodiment of the present application. The housing 10 of the power assembly 100 includes an electric motor accommodating cavity 11, a reducer accommodating cavity 12 and a generator accommodating cavity 13. The electric motor accommodating cavity 11 is used for accommodating the stator and the rotor of the electric motor 103, the generator accommodating cavity 13 is used for accommodating the stator and the rotor of the generator 102, and the reducer accommodating cavity 12 is used for accommodating the gear and the bearing of the reducer 101.

[0060] It can be understood that the shell 10 is integrated with the motor accommodating cavity 11, the speed reducer accommodating cavity 12 and the generator accommodating cavity 13, and can simultaneously accommodate the motor 103, the speed reducer 101 and the generator 102 of the power assembly 100, so that the motor 103, the speed reducer 101 and the generator 102 can be integrated to simplify the internal structure design of the power assembly 100 and realize the miniaturization of the power assembly 100. At the same time, the motor 103, the speed reducer 101 and the generator 102 are respectively accommodated by one cavity of the shell 10, and are spaced from each other to ensure the normal work between the functional structures inside the power assembly 100, and improve the overall working performance and service life of the power assembly 100.

[0061] In Figure 3 In the embodiment shown, the power assembly 100 further includes a transmission flow channel 20 for conveying the cooling liquid. An opening 20a at one end of the transmission flow channel 20 is used for inputting the cooling liquid, and a plurality of openings 20b at the other end of the transmission flow channel 20 are respectively used for outputting the cooling liquid. The transmission flow channel 20 can be integrated inside the shell 10, or can be but not limited to arranged outside the shell 10.

[0062] It can be understood that the transmission flow channel 20 is communicated between a plurality of functional structures inside the power assembly 100, for conveying the cooling liquid to lubricate or dissipate heat for each functional structure (as shown by the solid line in Figure 3 , to ensure the working performance and service life of each functional structure.

[0063] The shell 10 includes one flow channel inlet 14 and a plurality of flow channel outlets 15, and the one flow channel inlet 14 and the plurality of flow channel outlets 15 are arranged on the shell 10. The one flow channel inlet 14 is used for conveying the cooling liquid to the plurality of flow channel outlets 15 through the transmission flow channel 20.

[0064] Specifically, the one flow channel inlet 14 can be configured as the opening 20a at one end of the transmission flow channel 20, or the one flow channel inlet 14 can be used for being communicated with the opening 20a at one end of the transmission flow channel 20 and conveying the cooling liquid to the transmission flow channel 20. Each of the plurality of flow channel outlets 15 can be configured as one of the plurality of openings 20b at the other end of the transmission flow channel 20, or each of the plurality of flow channel outlets 15 can be used for being communicated with one of the openings 20b at the other end of the transmission flow channel 20 and conveying the cooling liquid to the opening 20b.

[0065] As Figure 3As shown, two of the plurality of flow channel outlets 15, one flow channel outlet 151 is in communication with the motor accommodating cavity 11, and one flow channel outlet 151 is used to deliver the cooling liquid to the motor accommodating cavity 11. Another flow channel outlet 152 is in communication with the speed reducer accommodating cavity 12, and another flow channel outlet 152 is used to deliver the cooling liquid to the speed reducer accommodating cavity 12. One or the rest of the plurality of flow channel outlets 153 is used to deliver the cooling liquid to the generator accommodating cavity 13. Among them, in Figure 3 In the embodiment shown, the flow channel outlet 15 used to deliver the cooling liquid to the motor accommodating cavity 11 is the first flow channel outlet 151, the flow channel outlet 15 used to deliver the cooling liquid to the speed reducer accommodating cavity 12 is the second flow channel outlet 152, and the flow channel outlet 15 used to deliver the cooling liquid to the generator accommodating cavity 13 is the third flow channel outlet 153.

[0066] As can be understood, the housing 10 is provided with one flow channel inlet 14 and a plurality of flow channel outlets 15, and one flow channel inlet 14 and a plurality of flow channel outlets 15 are communicated through the transmission flow channel 20, so that the external oil can be delivered from one flow channel inlet 14 to the transmission flow channel 20, and the cooling liquid in the transmission flow channel 20 is output through each flow channel outlet 15. Among them, two of the plurality of flow channel outlets 15 are respectively arranged on the inner wall of the motor accommodating cavity 11 and the inner wall of the speed reducer accommodating cavity 12, so that the transmission flow channel 20 can deliver the cooling liquid to the motor accommodating cavity 11 and the speed reducer accommodating cavity 12 through the two flow channel outlets 15, respectively, thereby delivering the cooling liquid to cool the stator and rotor of the motor 103 and lubricate at least one of the gear and bearing in the speed reducer 101, and improve the working performance and service life of the power assembly 100.

[0067] At the same time, one or the rest of the plurality of flow channel outlets 153 is communicated to the generator accommodating cavity 13, so that the transmission flow channel 20 can deliver the cooling liquid to the generator accommodating cavity 13 to cool the stator and rotor of the generator 102 in the generator accommodating cavity 13. At the same time, one flow channel inlet 14 delivers the cooling liquid to one or the rest of the plurality of flow channel outlets 153 through the same transmission flow channel 20, without the need to separately arrange the transmission flow channel 20 to deliver the cooling liquid to the generator accommodating cavity 13, which can simplify the internal structure of the power assembly 100.

[0068] It should be noted that, in the embodiment shown, Figure 3 In the embodiment shown, only one of the plurality of flow channel outlets 15, the first flow channel outlet 151, the second flow channel outlet 152, and the third flow channel outlet 153 are taken as examples for illustrative introduction. Among them, the number of the first flow channel outlet 151, the second flow channel outlet 152, and the third flow channel outlet 153 can be adjusted according to the actual structure design of the transmission flow channel 20 and the housing 10, and the embodiments of the present application do not make specific limitations.

[0069] In an embodiment, the cooling liquid can include, but is not limited to, water, methanol, ethanol, ethylene glycol, glycerol or other liquid medium, so as to be used for heat exchange cooling of the cooling oil with more heat in the operation of the electric vehicle.

[0070] In an embodiment, the cooling liquid can further include, but is not limited to, ethylene glycol-based cooling oil, synthetic oil and mineral oil, etc.

[0071] In an embodiment, the power assembly 100 further includes an oil pump 104. As shown in Figure 3 , the oil pump 104 is used to provide negative pressure and suck the cooling liquid from the oil pool 16, and the cooling liquid output by the oil pump 104 is delivered to each functional structure for lubrication or heat dissipation through the transmission flow channel 20. The oil pool 16 can be understood as a part of the shell 10 or a cavity structure surrounded by the inner wall of the shell 10, which is used to accommodate the cooling liquid (as shown by the dotted line in Figure 3 ) delivered by the transmission flow channel 20 to each functional structure of the power assembly 100 for lubrication or heat dissipation, that is, the cooling liquid after completing the lubrication or heat dissipation in the power assembly 100 is accommodated in the oil pool 16 of the shell 10.

[0072] Specifically, the inlet of the oil pump 104 is in communication with the oil pool 16 of the shell 10, and the outlet of the oil pump 104 is used to deliver the cooling liquid sucked from the oil pool 16 to the motor accommodating cavity 11, the generator accommodating cavity 13 and the reducer accommodating cavity 12 through the transmission flow channel 20, respectively.

[0073] In an embodiment, the power assembly 100 further includes a heat exchanger 30 and at least one filter 105. In Figure 3 the embodiment shown, the cooling liquid output by the outlet of the oil pump 104 still flows through at least one filter 105 before being delivered to one flow channel inlet 14.

[0074] As shown in Figure 3 , along the direction of the cooling liquid flow, the oil pump 104 is further provided with the heat exchanger 30 and at least one filter 105 between the oil pump 104 and one flow channel inlet 14, the heat exchanger 30 is used to exchange heat with the cooling liquid to reduce the temperature of the cooling liquid and output, and the at least one filter 105 is used to filter impurities or foreign matters that can be mixed into the cooling liquid to improve the cleanliness of the cooling liquid.

[0075] Understandably, by adding a heat exchanger 30 to the outlet side of the oil pump 104 along the direction of coolant flow, the coolant output from the outlet of the oil pump 104 can exchange heat with the coolant through the heat exchanger 30 before lubricating or cooling the motor side and before lubricating or cooling the generator side, thereby reducing the temperature of the coolant. This ensures the heat dissipation efficiency of the coolant on the generator side or motor side, and thus ensures that the generator 102 or motor 103 operates at a suitable temperature, thereby further improving the working performance and lifespan of the generator 102 or motor 103.

[0076] Simultaneously, at least one filter 105 is used to filter impurities or foreign objects that may mix into the coolant, thereby improving the cleanliness of the coolant. By adding at least one filter 105 between the outlet of the oil pump 104 and a flow channel inlet 14 along the direction of coolant flow, the coolant output from the outlet of the oil pump 104 is filtered by at least one filter 105 before being delivered to the flow channel inlet 14, thus improving the cleanliness of the coolant. This ensures that when the coolant lubricates the generator side or the motor side, impurities or foreign objects that may be mixed into the coolant are not damaged by impurities or foreign objects in the coolant, thereby reducing the working performance or transmission efficiency of the transmission mechanism. That is, before the coolant output from the oil pump 104 is delivered to the engine side or the motor side for lubrication or heat dissipation, the coolant also flows through at least one filter 105, which can further improve the working performance and life of the powertrain 100.

[0077] In one embodiment, at least one filter 105 includes two filters 105, wherein the pore size of the filter screen in one filter 105 is smaller than the pore size of the filter screen in the other filter 105.

[0078] The coolant flowing into one flow channel inlet 14 passes through a filter 105. The coolant drawn into the inlet of the oil pump 104 passes through another filter 105 before flowing into the inlet of the oil pump 104. Figure 3 In the illustrated embodiment, the filter 105 with a relatively small pore size is the first filter 1051, and the filter 105 with a relatively large pore size is the second filter 1052.

[0079] Specifically, along the direction of coolant flow, another filter 105 with a relatively larger pore size is arranged at the inlet of the oil pump 104 on the side opposite to the outlet of the oil pump 104, and another filter 105 with a relatively smaller pore size is arranged at the outlet of the oil pump 104 on the side opposite to the inlet of the oil pump 104, so that the coolant is filtered by the other filter 105 with a relatively larger pore size before flowing into the oil pump 104. Figure 3As shown, along the direction of coolant flow, the coolant flowing from the oil sump 16 of the housing 10 to multiple functional structural components of the powertrain 100 flows sequentially through the second filter 1052, the oil pump 104, the heat exchanger 30, and the first filter 1051.

[0080] Understandably, another filter 105 with a relatively larger pore size can filter out larger impurities or foreign objects that may be mixed into the coolant, achieving the coarse filtration effect of the other filter 105 and preventing damage to the oil pump 104 from these larger impurities or foreign objects. In other words, the other filter 105 with a relatively larger pore size can protect the oil pump 104, thereby improving its performance and lifespan.

[0081] Meanwhile, the different pore sizes of the two filters 105 allow them to complement and cooperate when filtering coolant, thereby further improving the filtration effect on coolant.

[0082] It should be noted that, in Figure 4 The embodiments shown are merely illustrative examples of one possible arrangement and relative position of the functional structural components within the powertrain 100 of this application, and do not limit the arrangement, relative position, connection method, structural shape, and size of the functional structural components provided in the embodiments of this application to this. In other embodiments provided in this application, the arrangement, relative position, connection method, structural shape, and size of the functional structural components within the powertrain 100 can be adjusted according to actual design requirements, and this application does not impose specific limitations on this.

[0083] Please see Figure 4 , Figure 4 This is a schematic planar structure diagram of the direct-connection flow channel 40 of the powertrain 100 provided in an embodiment of this application, which transports coolant. Figure 4 In the embodiment shown, the powertrain 100 includes a direct flow channel 40 and a valve 50. The outlet of the oil pump 104 is used to deliver coolant to a flow channel inlet 14 through the heat exchanger 30 and the direct flow channel 40, respectively. The valve 50 is used to adjust the flow rate of coolant delivered to the flow channel inlet 14 from at least one of the heat exchanger 30 and the direct flow channel 40.

[0084] like Figure 5 As shown, the direct flow channel 40 includes a direct flow channel inlet 41 and a direct flow channel outlet 42. The direct flow channel inlet 41 is used to receive coolant and to supply coolant to the direct flow channel outlet 42. Specifically, the direct flow channel inlet 41 is used to supply coolant to the direct flow channel outlet 42 through the valve 50.

[0085] It can be understood that the direct connection flow channel 40 is arranged on one side of the heat exchanger 30, and the valve 50 is connected in series with the direct connection flow channel 40 and located on one side of the heat exchanger 30, thereby achieving the adjustment of the flow of the cooling liquid delivered to the heat exchanger 30 and the direct connection flow channel 40 through the valve 50, reducing the structural size of the housing along the direction in which the cooling liquid is output from the outlet of the oil pump 104, and arranging the valve 50 in the space of the housing by using the direct connection flow channel 40 to reduce the structural size of the housing along the direction in which the heat exchanger 30 and the direct connection flow channel 40 are arranged. That is, by arranging the valve 50 in series with the direct connection flow channel 40, the internal structure design of the housing and the overall structural size can be simplified, and the overall miniaturization design of the power assembly 100 can be achieved.

[0086] For example, the outlet of the oil pump 104 is used to deliver the cooling liquid to one inlet of the heat exchanger 30 and the direct connection flow channel inlet 41, respectively, and the outlet of the heat exchanger 30 and the direct connection flow channel outlet 42 are used to deliver the cooling liquid to one flow channel inlet 14 at the same time.

[0087] It can be understood that the outlet of the oil pump 104 is in communication with one inlet of the heat exchanger 30 and the direct connection flow channel inlet 41 at the same time, and one flow channel inlet 14 is in communication with the outlet of the heat exchanger 30 and the direct connection flow channel outlet 42, so that the direct connection flow channel 40 is formed in parallel with the heat exchanger 30. When the valve 50 adjusts the opening degree of the valve 50, the flow of the cooling liquid delivered to one inlet of the heat exchanger 30 and the direct connection flow channel inlet 41 can be adjusted synchronously, thereby achieving the effect of dynamically adjusting the temperature of the cooling liquid in the transmission flow channel 20.

[0088] At the same time, the heat exchanger 30 and the direct connection flow channel 40 are arranged in parallel, and only the valve 50 needs to be arranged to simultaneously adjust the flow of the cooling liquid of one inlet of the heat exchanger 30 and the direct connection flow channel inlet 41 in parallel, thereby achieving the simplified design of the internal structure of the power assembly 100.

[0089] Generally, the working temperature of the cooling liquid in the power assembly is difficult to adaptively adjust according to different working conditions of the power assembly, thereby reducing the working performance and service life of the power assembly.

[0090] The outlet of the oil pump 104 of the power assembly 100 of the present application outputs the cooling liquid to the heat exchanger 30 and the direct connection flow channel 40, respectively, and the cooling liquid output from the heat exchanger 30 and the direct connection flow channel 40 is delivered to one flow channel inlet 14, so that the cooling liquid output from the heat exchanger 30 and the direct connection flow channel 40 can be delivered to the motor accommodating cavity 11 and the speed reducer accommodating cavity 12 through the transmission flow channel. Among them, the cooling liquid of the outlet of the oil pump 104 can be delivered to the heat exchanger 30 and the direct connection flow channel 40, respectively, and the cooling liquid output from the heat exchanger 30 and the direct connection flow channel 40 can be delivered to the same transmission flow channel 20 from one flow channel inlet 14.

[0091] Since the heat exchanger 30 can exchange heat with the cooling liquid to reduce the temperature of the cooling liquid, by adjusting the flow of the cooling liquid respectively transported by the heat exchanger 30 and the direct flow channel 40 into one flow channel inlet 14 through the valve 50, the temperature of the cooling liquid respectively transported by the heat exchanger 30 and the direct flow channel 40 into one flow channel inlet 14 can be adjusted.

[0092] It can be understood that the valve 50 can adjust the flow of the cooling liquid respectively transported into the heat exchanger 30 and the direct flow channel 40 according to different working conditions of the power assembly 100, so as to realize dynamic adjustment of the temperature of the cooling liquid, thereby ensuring that the cooling liquid can effectively cool the stator and rotor of the motor 103 and effectively lubricate the gear and bearing of the reducer 101 when the power assembly 100 works in different working conditions, improving the adaptability of the power assembly 100 to different working conditions, and further improving the working performance and service life of the power assembly 100. At the same time, the direct flow channel 40, the heat exchanger 30 and the valve 50 cooperate to work, which can realize dynamic adjustment of the temperature of the cooling liquid transported into the transmission flow channel, and can realize reuse of the internal structure of the shell to simplify the structural design of the shell.

[0093] The electric vehicle 1000 of the present application is equipped with the power assembly 100 in any of the above-mentioned implementation manners, which can improve the working performance and service life of the electric vehicle 1000 of the present application. That is, because the power assembly 100 in any of the above-mentioned implementation manners is used, the electric vehicle 1000 of the present application has all the beneficial effects that the power assembly 100 in any of the above-mentioned implementation manners can have.

[0094] In one embodiment, the valve 50 is used to reduce the flow of the cooling liquid flowing into one flow channel inlet 14 through the direct flow channel 40 and increase the flow of the cooling liquid flowing into one flow channel inlet 14 through the heat exchanger 30 under the condition that the rotating speed of the oil pump 104 remains unchanged.

[0095] In one embodiment, the valve 50 is used to increase the flow of the cooling liquid flowing into one flow channel inlet 14 through the direct flow channel 40 and reduce the flow of the cooling liquid flowing into one flow channel inlet 14 through the heat exchanger 30 under the condition that the rotating speed of the oil pump 104 remains unchanged.

[0096] That is, the rotating speed of the oil pump 104 remains unchanged, that is, the flow of the cooling liquid output by the outlet of the oil pump 104 is fixed, so that the valve 50 synchronously adjusts the flow of the cooling liquid in the heat exchanger 30 and the direct flow channel 40 when adjusting the opening degree of the valve 50. Specifically, the valve 50 is used to increase the flow of the cooling liquid in the direct flow channel 40 while reducing the flow of the cooling liquid in the heat exchanger 30. Or, the valve 50 is used to reduce the flow of the cooling liquid in the direct flow channel 40 while increasing the flow of the cooling liquid in the heat exchanger 30.

[0097] It can be understood that the valve 50 adjusts the flow of the coolant in the heat exchanger 30 to increase, which can reduce the temperature of the coolant. The valve 50 adjusts the flow of the coolant in the direct flow channel 40 to increase, which can increase the temperature of the coolant. By adjusting the flow of the coolant in the heat exchanger 30 and the direct flow channel 40 by the valve 50 under the condition that the rotating speed of the oil pump 104 is kept unchanged, the function of adjusting the temperature of the coolant delivered to one flow channel inlet 14 can be realized, and then the temperature of the coolant in the power assembly 100 is adjusted, so that the coolant works in a suitable temperature state to improve the working performance of the coolant.

[0098] In one embodiment, the valve 50 adjusts the opening degree of the valve 50. In this case, the opening degree of the valve 50 is increased, and the flow of the coolant flowing into one flow channel inlet 14 from the heat exchanger 30 is reduced, and the flow of the coolant flowing into one flow channel inlet 14 from the direct flow channel 40 is increased.

[0099] It can be understood that the opening degree of the valve 50 is increased, and at this time the valve 50 adjusts the flow of the coolant input into one inlet of the heat exchanger 30 to be reduced, and the flow of the coolant input into the direct flow channel inlet 41 to be increased. By reducing the heat exchange of the coolant input into the heat exchanger 30, and at the same time making the coolant directly delivered to one flow channel inlet 14 through the direct flow channel 40, the temperature of the coolant delivered in the transmission flow channel 20 can be improved, and the effect of increasing the temperature of the coolant can be realized. While improving the flow effect of the coolant in the transmission flow channel 20, the lubrication effect of the coolant on the transmission structure in the power assembly 100 can also be improved, and the oil stirring loss of the coolant in the transmission mechanism can be reduced.

[0100] In one embodiment, the opening degree of the valve 50 is reduced, the flow of the coolant flowing into one flow channel inlet 14 from the heat exchanger 30 is increased, and the flow of the coolant flowing into one flow channel inlet 14 from the direct flow channel 40 is reduced.

[0101] It can be understood that the opening degree of the valve 50 is reduced, and at this time the valve 50 adjusts the flow of the coolant input into one inlet of the heat exchanger 30 to be increased, and the flow of the coolant input into the direct flow channel inlet 41 to be reduced. By increasing the heat exchange of the coolant input into the heat exchanger 30, and at the same time reducing the flow of the coolant directly delivered to one flow channel inlet 14 through the direct flow channel 40, the temperature of the coolant delivered in the transmission flow channel 20 can be reduced, and the effect of reducing the temperature of the coolant can be realized. Reducing the temperature of the coolant can improve the heat dissipation effect of the coolant on the functional structure with high heat generation in the power assembly 100.

[0102] Please refer to Figure 6 and Figure 5 , Figure 6 the working principle diagram of the valve 50 of the power assembly 100 provided in the embodiments of the present application, Figure 6Fig. 2 shows a partial plan view of the power assembly 100 according to an embodiment of the present application. In order to clearly show the structure of the oil pump 104 delivering the coolant to the heat exchanger 30 and the direct flow channel 40 respectively, the filter 105 and other functional structural components of the power assembly 100 are omitted in the embodiment shown in Fig. 2. Figure 5 Fig. 3 shows a partial plan view of the power assembly 100 according to another embodiment of the present application. In order to clearly show the structure of the oil pump 104 delivering the coolant to the heat exchanger 30 and the direct flow channel 40 respectively, the filter 105 and other functional structural components of the power assembly 100 are omitted in the embodiment shown in Fig. 3. Figure 6 Fig. 4 shows a partial plan view of the power assembly 100 according to another embodiment of the present application. In the embodiment shown in Fig. 4, the valve 50 is configured to adjust the opening degree of the valve 50 according to at least one of the temperature of the coolant in the motor accommodating cavity 11 and the temperature of the coolant in the reducer accommodating cavity 12. Figure 5 Fig. 5 shows a partial plan view of the power assembly 100 according to another embodiment of the present application. In the embodiment shown in Fig. 5, the valve 50 is configured to adjust the opening degree of the valve 50 according to at least one of the temperature of the coolant in the motor accommodating cavity 11 and the temperature of the coolant in the reducer accommodating cavity 12.

[0103] In one embodiment, when the temperature of the coolant in the reducer accommodating cavity 12 is less than a first preset temperature value, the valve 50 is configured to adjust the opening degree of the valve 50 to be greater than a first opening degree.

[0104] For example, when the external environment is relatively low, the coolant inside the power assembly 100 can freeze and the viscosity of the coolant increases, i.e., the temperature of the coolant is less than the first preset temperature value. The first preset temperature value can be, but is not limited to, between 0-10°C. When the temperature of the coolant in the reducer accommodating cavity 12 is too low, the flow resistance of the coolant during the delivery process can increase and the oil stirring loss of the coolant when lubricating the reducer 101 can also increase.

[0105] As shown in Figs. 4 and 5, when the temperature of the coolant in the reducer accommodating cavity 12 is too low, at least one of the stator and the rotor of the motor 103 can be configured to heat the coolant in the motor accommodating cavity 11 by operating the motor 103 in a locked-rotor heating mode. Heating the coolant by at least one of the stator and the rotor of the motor 103 can increase the temperature of the coolant, thereby reducing the viscosity of the coolant during the delivery process and improving the delivery efficiency of the coolant. In the locked-rotor heating mode, the motor 103 outputs torque when the rotational speed is 0, i.e., the current input to the motor 103 is increased to heat at least one of the stator winding or the rotor winding of the motor 103. The large amount of heat generated by at least one of the stator winding or the rotor winding of the motor 103 can heat the coolant in the motor accommodating cavity 11, thereby increasing the temperature of the coolant in the motor accommodating cavity 11. Figure 6 Figure 6 When the heated coolant is output from the outlet of the oil pump 104, the valve 50 is configured to adjust the opening degree of the valve 50 to be greater than the first opening degree, so that the valve 50 adjusts the coolant output from the outlet of the oil pump 104 to be more delivered to the direct flow channel 40 (as shown by the solid line in Fig. 2) and less delivered to the heat exchanger 30 (as shown by the dashed line in Fig. 2).

[0106] When the heated coolant is output from the outlet of the oil pump 104, the valve 50 is configured to adjust the opening degree of the valve 50 to be greater than the first opening degree, so that the valve 50 adjusts the coolant output from the outlet of the oil pump 104 to be more delivered to the direct flow channel 40 (as shown by the solid line in Fig. 2) and less delivered to the heat exchanger 30 (as shown by the dashed line in Fig. 2). Figure 6 Figure 5 ​​For example, the valve 50 can adjust the opening degree of the valve 50 to 100% (but not limited to) so that the coolant is entirely delivered from the outlet of the oil pump 104 to the direct flow channel 40.

[0107] It can be understood that the coolant with the increased temperature is delivered from the direct flow channel 40 to one flow channel inlet 14 as much as possible and delivered to the reducer accommodating cavity 12 through the other flow channel outlet 152 to lubricate the gear or bearing of the reducer 101, which can reduce the oil stirring loss of the coolant at the transmission mechanism of the power assembly 100, improve the lubrication efficiency of the coolant and further improve the working performance and service life of the power assembly 100.

[0108] Please refer to Figure 7 Please refer to Figure 7 , Figure 7 The partial planar result schematic diagram of the power assembly 100 provided by the embodiment of the present application is shown. When the temperature of the coolant in the motor accommodating cavity 11 is greater than the second preset temperature value, the valve 50 adjusts the opening degree of the valve 50 to be less than the second opening degree, and the second opening degree is less than the first opening degree.

[0109] For example, when the heat generated by at least one of the stator and the rotor of the motor 103 is high, the temperature of the coolant in the motor accommodating cavity 11 is too high, that is, the temperature of the coolant in the motor accommodating cavity 11 is greater than the second preset temperature value. The second preset temperature value can be but is not limited to greater than or equal to 70°C. At this time, the valve 50 adjusts the opening degree of the valve 50 to be less than the second opening degree, and the second opening degree is less than the first opening degree.

[0110] It can be understood that the adjustment of the valve 50 to the opening degree of the valve 50 reduces the flow of the coolant delivered from the outlet of the oil pump 104 to the direct flow channel 40 (as shown by the dotted line in FIG. 6) and increases the flow of the coolant delivered from the outlet of the oil pump 104 to the heat exchanger 30 (as shown by the solid line in FIG. 6). Figure 7 Figure 5 It can be understood that the adjustment of the valve 50 to the opening degree of the valve 50 reduces the flow of the coolant delivered from the outlet of the oil pump 104 to the direct flow channel 40 (as shown by the dotted line in FIG. 6) and increases the flow of the coolant delivered from the outlet of the oil pump 104 to the heat exchanger 30 (as shown by the solid line in FIG. 6).

[0111] Please refer to Figure 8 Please refer to Figure 8 , Figure 5 The partial planar result schematic diagram of the power assembly 100 provided by the embodiment of the present application is shown. When the temperature of the coolant in the motor accommodating cavity 11 is greater than the second preset temperature value, the valve 50 adjusts the opening degree of the valve 50 to be less than the second opening degree, and the second opening degree is less than the first opening degree. Figure 8 Figure 8 ​​In the embodiment shown, when the temperature of at least one of the stator or the rotor of the electric motor 103 is greater than a third preset temperature value, which is greater than the second preset temperature value, the oil pump 104 delivers the coolant to the heat exchanger 30 by adjusting the opening degree of the valve 50 to a third opening degree, which is less than the second opening degree.

[0112] For example, the power assembly 100 further comprises a temperature sensor (not shown in the figure) for monitoring the temperature of at least one of the stator or the rotor of the electric motor 103. When the temperature sensor monitors that the temperature of at least one of the stator or the rotor of the electric motor 103 is greater than a third preset temperature value, the temperature sensor can transmit the temperature value of at least one of the stator or the rotor of the electric motor 103 monitored to a controller 1004, and control the valve 50 to adjust the opening degree of the valve 50 to be less than the third opening degree by the controller 1004. The third preset temperature value can be, but is not limited to, greater than or equal to 130°C.

[0113] That is, when the temperature sensor monitors that the temperature of at least one of the stator or the rotor of the electric motor 103 is too high, in order to ensure the heat dissipation and cooling effect of the coolant on the stator or the rotor of the electric motor 103, the opening degree of the valve 50 can be reduced to further increase the flow of the coolant delivered to the heat exchanger 30 for heat exchange (as shown by the solid line in Figure 8 ), and at the same time further reduce the flow of the coolant directly delivered to a flow channel inlet 14 through the direct flow channel 40 (as shown by the dotted line in Figure 5 ), which can further improve the efficiency of the temperature reduction of the coolant.

[0114] For example, the valve 50 can adjust the opening degree of the valve 50 to 0, so that the coolant output by the oil pump 104 is all delivered to the heat exchanger 30 for heat exchange, and then delivered to a flow channel inlet 14 through the outlet of the heat exchanger 30.

[0115] It can be understood that, in the embodiments shown in Figure 8 and Figure 9 , when the temperature of the coolant in the motor accommodating cavity 11 is too high, further reducing the opening degree of the valve 50 by the valve 50 can increase the coolant input to the heat exchanger 30 for heat exchange, so as to further improve the cooling efficiency of the coolant and further reduce the temperature of the coolant.

[0116] Please refer to Figure 10 and Figure 9 , Figure 10 for the working principle diagram of the valve 50 of the power assembly 100 provided in the embodiments of the present application, Figure 9A partial plan view of an electric vehicle 1000 is provided in the embodiments of the present application. The electric vehicle 1000 further comprises a water pump 1005, which is configured to output cooling water to dissipate heat of the power battery 1002. In Figure 10 and Figure 9 In the embodiments shown in

[0117] The heat exchanger 30 comprises another inlet of the heat exchanger 30 and another outlet of the heat exchanger 30. The another inlet of the heat exchanger 30 is configured to communicate with the water pump 1005 and to receive the cooling water output by the water pump 1005 to exchange heat with the cooling oil in the heat exchanger 30. The another outlet of the heat exchanger 30 is configured to output the cooling water after heat exchange to the outside of the heat exchanger 30.

[0118] In an embodiment, the valve 50 of the power assembly 100 is further configured to adjust the opening degree of the valve 50 according to the temperature of the power battery 1002. Specifically, when the temperature of the power battery 1002 is less than a fourth preset temperature value, the valve 50 is adjusted to have an opening degree less than a fourth opening degree. The fourth opening degree is less than the second opening degree.

[0119] For example, when the temperature of the external environment is low, the electric vehicle 1000 and the power battery 1002 of the electric vehicle 1000 usually need to be heated to enable the power battery 1002 to work normally. At this time, the electric motor 103 can be operated in the locked-rotor heating mode to heat the cooling oil in the motor accommodating cavity 11 by at least one of the stator and the rotor of the electric motor 103. The temperature of the cooling oil can be increased by heating the cooling oil by at least one of the stator and the rotor of the electric motor 103.

[0120] As shown in Figure 10 and Figure 9 The opening degree of the valve 50 is reduced by the valve 50, and the flow rate of the cooling oil delivered by the outlet of the oil pump 104 to the heat exchanger 30 is increased, and the flow rate of the cooling oil delivered by the oil pump 104 to the direct flow channel 40 is reduced. When the flow rate of the cooling oil delivered by the outlet of the oil pump 104 to the heat exchanger 30 is increased, the cooling oil delivered to the heat exchanger 30 can exchange heat with the cooling water input from the another inlet of the heat exchanger 30 to increase the temperature of the cooling water input to the heat exchanger 30, thereby achieving the effect of heating the cooling water. The heated cooling water can be delivered to the power battery 1002 side through the vehicle cooling system of the electric vehicle 1000, and the effect of heating the power battery 1002 can be achieved to enable the power battery 1002 to work in a suitable temperature environment, thereby improving the working performance and service life of the power battery 1002.

[0121] It can be understood that, in Figure 10 andFigure 10 In the embodiment shown, the valve 50, the direct flow channel 40 and the heat exchanger 30 can also work in cooperation with the water pump 1005, so as to realize dynamic adjustment of the temperature of the cooling liquid in the power assembly 100, and also realize dynamic adjustment of the temperature of the cooling water in the whole vehicle cooling system of the electric vehicle 1000, so as to further improve the working performance and service life of the electric vehicle 1000 and reduce the power consumption of the electric vehicle 1000.

[0122] In one embodiment, along the direction of the flow of the cooling liquid in the direct flow channel 40, the flow distance of the cooling liquid in the direct flow channel 40 is greater than the interval between one inlet of the heat exchanger 30 and the outlet of the heat exchanger 30. In this embodiment, the interval between the direct flow channel inlet 41 and the outlet of the oil pump 104 is less than the interval between one inlet of the heat exchanger 30 and the outlet of the oil pump 104, and the interval between the direct flow channel outlet 42 and one flow channel inlet 14 is less than the interval between the outlet of the heat exchanger 30 and one flow channel inlet 14.

[0123] In Figure 11 In the embodiment shown, along the direction of the flow of the cooling liquid, the direct flow channel inlet 41 is located between the outlet of the oil pump 104 and one inlet of the heat exchanger 30, so that the cooling liquid output by the outlet of the oil pump 104 can be first delivered into the direct flow channel inlet 41, and the effect of the valve 50 on adjusting the flow of the cooling liquid delivered into the direct flow channel 40 can be improved.

[0124] At the same time, along the direction of the flow of the cooling liquid, the direct flow channel outlet 42 is located between the outlet of the heat exchanger 30 and one flow channel inlet 14, so that the cooling liquid output by the direct flow channel outlet 42 can be delivered into one flow channel inlet 14 earlier than the cooling liquid output from the outlet of the heat exchanger 30, and thus the influence of the temperature of the cooling liquid output from the outlet of the heat exchanger 30 on the temperature of the cooling liquid output by the direct flow channel outlet 42 can be reduced, so as to improve the adjustment performance and temperature maintaining effect of the temperature of the cooling liquid delivered into one flow channel inlet 14.

[0125] In one embodiment, please refer to Figure 11 , Figure 11 The partial planar structure schematic diagram of the direct flow channel 40 and the heat exchanger 30 of the power assembly 100 provided by the embodiment is shown. In Figure 11 In the embodiment shown, the aperture of the direct flow channel 40 is greater than the aperture of one inlet of the heat exchanger 30.

[0126] For example, the aperture of the direct flow channel 40 is in the range of Figure 11 In the embodiment shown, the aperture of the direct flow channel 40 is in the range of Figure 11 In the embodiment shown, the aperture of the direct flow channel 40 is in the range of

[0127] It can be understood that, since the larger the aperture, the smaller the flow resistance of the coolant, the aperture of the direct connection flow channel 40 is larger than the aperture of one inlet of the heat exchanger 30, so that the coolant output by the outlet of the oil pump 104 can be more easily transported from the inlet of the direct connection flow channel 40 into the direct connection flow channel 40, avoiding the direct connection flow channel 40 that may increase the flow resistance of the coolant due to too many bends of the flow path and other factors, thereby being able to improve the adjustment accuracy of the valve 50 to the flow of the coolant transported into the heat exchanger 30 and the direct connection flow channel 40. That is, the accuracy of the valve 50 in adjusting the temperature of the coolant inside the power assembly 100 can be further improved, and the sensitivity of the valve 50 in adjusting the temperature of the coolant can be improved.

[0128] In Figure 12 the embodiments shown, only the apertures of the direct connection flow channel 40 and one inlet of the heat exchanger 30 are exemplarily introduced in one possible embodiment, but the actual apertures between the apertures of the direct connection flow channel 40 and one inlet of the heat exchanger 30, and the proportional relationship between the relative sizes of the two are not limited to this. In other embodiments of the present application, the apertures of the direct connection flow channel 40 and one inlet of the heat exchanger 30 can be adjusted according to actual design needs, that is, the apertures of the direct connection flow channel 40 and one inlet of the heat exchanger 30 can be equal or not equal, and the relative size relationship between the two can also be adjusted according to actual design needs.

[0129] Please refer to Figure 12 , Figure 11 the planar structure schematic diagram of the transmission flow channel 20 of the power assembly 100 provided in the embodiments of the present application for conveying the coolant. As Figure 12 shown, along the direction of the flow of the coolant, the flow distance of the coolant from one flow channel inlet 14 to one flow channel outlet 151 is less than the flow distance of the coolant from one flow channel inlet 14 to another flow channel outlet 152.

[0130] In Figure 12 the embodiments shown, along the direction of the flow of the coolant, the coolant input from one flow channel inlet 14 first flows into one flow channel outlet 151 and then flows into another flow channel outlet 152, so that the coolant input from one flow channel inlet 14 is first transported into the motor accommodating cavity 11 to cool the stator and rotor of one motor, and then transported from another flow channel outlet 152 into the speed reducer accommodating cavity 12 to lubricate the gear or bearing of the speed reducer 101.

[0131] Meanwhile, the cooling liquid in the transmission flow channel 20 is first delivered into the motor accommodating cavity 11 and then into the speed reducer accommodating cavity 12, and the stator and rotor of the motor 103 accommodated in the motor accommodating cavity 11 can heat the cooling liquid input from one flow channel outlet 151, so that the cooling liquid with a temperature increased after heating is circulated in the power assembly 100 first to increase the overall temperature of the cooling liquid in the power assembly 100. While increasing the cooling liquid temperature increasing efficiency, the lubrication effect and efficiency of the gear and bearing of the speed reducer 101 can be improved when the cooling liquid is delivered into the speed reducer accommodating cavity 12 through the other flow channel outlet 152, and the oil stirring loss of the gear shaft of the speed reducer is reduced.

[0132] In one embodiment, the aperture of one flow channel outlet 151 is smaller than the aperture of the other flow channel outlet 152. ​ In the illustrated embodiment, the aperture of one flow channel outlet 151 is a third aperture D3, and the aperture of the other flow channel outlet 152 is a fourth aperture D4. The third aperture D3 is smaller than the fourth aperture D4.

[0133] It can be understood that the apertures of the two flow channel outlets 15 are designed differently, so that the flow resistance of the cooling liquid to the two flow channel outlets 15 is adjusted differently, and the flow of the cooling liquid to the two flow channel outlets 15 can be distributed adaptively. Specifically, by setting the aperture of one flow channel outlet 151 for delivering the cooling liquid into the motor accommodating cavity 11 of the motor 103 to be smaller than the aperture of the other flow channel outlet 152 for delivering the cooling liquid into the speed reducer accommodating cavity 12, the flow resistance of the cooling liquid to one flow channel outlet 151 is smaller than that to the other flow channel outlet 152, so that the cooling liquid delivered from one flow channel inlet 14 can be more easily delivered into the other flow channel outlet 152, and the cooling liquid can be more distributed to the other flow channel outlet 152.

[0134] That is, by setting the apertures of the two flow channel outlets 15 differently, the flow of the cooling liquid delivered by the transmission flow channel 20 into the motor accommodating cavity 11 and the speed reducer accommodating cavity 12 can be adjusted adaptively according to the heat dissipation requirement of the motor 103 and the lubrication requirement of the speed reducer 101, so that the heat dissipation effect of the cooling liquid on the stator and rotor of the motor 103 is ensured, and the lubrication effect of the cooling liquid on the speed reducer is improved at the same time.

[0135] In one embodiment, along the direction of the flow of the cooling liquid, the flow distance of the cooling liquid from one flow channel inlet 14 to the two flow channel outlets 15 is smaller than the flow distance of the cooling liquid from one flow channel inlet 14 to one or more of the remaining flow channel outlets 153.

[0136] It can be understood that, along the direction of the flow of the cooling liquid, the cooling liquid is first delivered to the motor side and then to the engine side. That is, the cooling liquid is first delivered to the motor accommodating cavity 11 and the reducer accommodating cavity 12 and then to the generator accommodating cavity 13. According to the different needs of the motor 103, the reducer 101 and the generator 102 for the cooling liquid, the order of the delivery of the cooling liquid into the motor accommodating cavity 11, the reducer accommodating cavity 12 and the generator accommodating cavity 13 is adaptively adjusted to improve the cooling or lubricating efficiency of the cooling liquid on the functional structures in the power assembly 100.

[0137] Of course, each of the above embodiments can be applied alone or in combination. The above is the preferred embodiment of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which are also considered to be within the scope of protection of the present application.

Claims

1. A powertrain with flow splitting via a direct-connection flow channel, characterized in that, The powertrain housing includes a motor housing, a reducer housing, a flow channel inlet, and multiple flow channel outlets. The motor housing houses the stator and rotor of a motor, and the reducer housing houses the gears and bearings of the reducer. The flow channel inlet is used to supply coolant to the plurality of flow channel outlets through the same transmission flow channel, and two of the plurality of flow channel outlets are used to supply coolant to the motor housing cavity and the reducer housing cavity, respectively. An oil pump outlet is used to deliver coolant to the inlet of a flow channel via a heat exchanger and a direct-connect flow channel, respectively, and a valve is used to adjust the flow rate of coolant delivered to the inlet of at least one of the heat exchanger and the direct-connect flow channel.

2. The powertrain according to claim 1, characterized in that, The direct-connect flow channel includes a direct-connect flow channel inlet and a direct-connect flow channel outlet. The direct-connect flow channel inlet is used to receive coolant and to supply coolant to the direct-connect flow channel outlet, wherein: The direct-connection channel inlet is used to deliver coolant to the direct-connection channel outlet through the valve.

3. The powertrain according to claim 2, characterized in that, The outlet of the oil pump is used to deliver coolant to the inlet of the heat exchanger and the inlet of the direct-connection channel, respectively. The outlet of one heat exchanger and the outlet of one direct-connection flow channel are used to simultaneously supply coolant to the inlet of one flow channel.

4. The powertrain according to claim 2, characterized in that, Along the direction of coolant flow within the one direct-connection channel, the distance the coolant travels within the one direct-connection channel is greater than the interval between the inlet and outlet of the one heat exchanger, wherein: The distance between the inlet of the direct-connection channel and the outlet of the oil pump is less than the distance between the inlet of the heat exchanger and the outlet of the oil pump. The distance between the outlet of the direct-connected flow channel and the inlet of the flow channel is less than the distance between the outlet of the heat exchanger and the inlet of the flow channel.

5. The powertrain according to claim 2, characterized in that, The diameter of the direct-connection channel is larger than the diameter of the inlet of the heat exchanger.

6. The powertrain according to any one of claims 1-5, characterized in that, One of the two flow channel outlets is used to supply coolant to the motor housing cavity, and the other flow channel outlet is used to supply coolant to the reducer housing cavity, wherein: Along the direction of coolant flow, the distance the coolant travels from one flow channel inlet to one flow channel outlet is less than the distance the coolant travels from one flow channel inlet to the other flow channel outlet.

7. The powertrain according to claim 6, characterized in that, The diameter of one flow channel outlet is smaller than the diameter of the other flow channel outlet.

8. The powertrain according to any one of claims 1-7, characterized in that, The powertrain housing also includes a generator housing for accommodating the stator and rotor of a generator, and one or more of the plurality of flow outlets are used to supply coolant to the generator housing, wherein: Along the direction of coolant flow, the distance the coolant travels from the one channel inlet to the two channel outlets is less than the distance the coolant travels from the one channel inlet to the one or more other channel outlets.

9. The powertrain according to any one of claims 1-8, characterized in that, The valve is used to, while keeping the rotational speed of the oil pump constant, perform the following functions: Reduce the flow rate of coolant flowing into the inlet of the channel through the direct-connection channel and increase the flow rate of coolant flowing into the inlet of the channel from the heat exchanger; Increase the flow rate of coolant flowing into the inlet of the channel through the direct-connection channel and decrease the flow rate of coolant flowing into the inlet of the channel from the heat exchanger.

10. The powertrain according to any one of claims 1-9, characterized in that, The valve adjusts the opening degree of the valve, wherein: The opening degree of the valve is increased, which at the same time reduces the flow rate of coolant flowing into the inlet of the heat exchanger and increases the flow rate of coolant flowing into the inlet of the direct-connected flow channel. The opening degree of the valve is reduced, which increases the flow rate of coolant flowing into the inlet of the heat exchanger and simultaneously reduces the flow rate of coolant flowing into the inlet of the direct-connected flow channel.

11. The powertrain according to claim 10, characterized in that, The valve is used to adjust the opening degree of the valve according to at least one of the temperature of the coolant in the motor cavity and the temperature of the coolant in the reducer cavity, wherein: When the temperature of the coolant in the accumulator cavity of the reducer is lower than the first preset temperature value, the valve is adjusted to have an opening degree greater than the first opening degree. When the temperature of the coolant in the motor housing cavity is greater than the second preset temperature value, the valve is adjusted to a degree less than the second degree of opening, and the second degree of opening is less than the first degree of opening. When the temperature of at least one of the stator or rotor of the electric motor is greater than a third preset temperature value, and the third preset temperature value is greater than the second preset temperature value, the oil pump adjusts the opening degree of the valve through the valve to maintain a third opening degree to deliver the coolant to the heat exchanger, and the third opening degree is less than the second opening degree.

12. The powertrain according to any one of claims 1-11, characterized in that, The powertrain also includes at least one filter, and the coolant output from the outlet of the oil pump flows through the at least one filter before being delivered to the inlet of the flow channel via the direct-connect flow channel and the heat exchanger.

13. An electric vehicle, characterized in that, The electric vehicle includes a power battery, wheels, and a powertrain as described in any one of claims 1-12, wherein the power battery provides kinetic energy to an electric motor of the powertrain and drives the wheels via the electric motor.

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