CN217455641U

CN217455641U - Electric drive system of vehicle and vehicle

Info

Publication number: CN217455641U
Application number: CN202221197845.0U
Authority: CN
Inventors: 关春光; 胡如现; 刘乃胜; 晋聪
Original assignee: Beiqi Foton Motor Co Ltd
Current assignee: Beiqi Foton Motor Co Ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-09-20
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses an electric drive system and vehicle of vehicle, the electric drive system of vehicle includes: a motor; a speed reducer; the control box is used for controlling the motor to work, a motor controller, a controller capacitor and a power supply control assembly are arranged in the control box, and the motor controller, the controller capacitor and the power supply control assembly are arranged in the radial direction of the control box. From this, through with motor controller, controller electric capacity and power control assembly are integrated together, and motor controller, controller electric capacity and power control assembly arrange the setting in the radial direction of control box, compared with the prior art, when the control box sets up in the top of motor and reduction gear, can reduce electric drive system's height dimension, also can optimize the circuit arrangement between motor controller and the power control assembly, thereby can reduce the installation degree of difficulty of electric drive system in the vehicle, also can make electric drive system assemble more easily, and then can improve the production efficiency of vehicle.

Description

Electric drive system of vehicle and vehicle

Technical Field

The present invention relates to the field of vehicles, and more particularly, to an electric drive system for a vehicle and a vehicle having the same.

Background

Among the correlation technique, motor controller and power control assembly all set up independently among the current electric drive system, motor controller installs in the top of motor and reduction gear, and power control assembly and motor controller pile up the setting in electric drive system's direction of height, not only cause electric drive system's high dimension too high, and can lead to wiring between motor controller and the power control assembly loaded down with trivial details, thereby cause electric drive system installation difficulty in the vehicle, also can lead to electric drive system to be difficult to assemble, and then can influence the production efficiency of vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. For this reason, an object of the present invention is to provide an electric drive system of a vehicle, which has a smaller height dimension and can optimize the circuit layout between the motor controller and the power control module, so as to reduce the installation difficulty of the electric drive system in the vehicle, and to make the electric drive system easier to assemble, thereby improving the production efficiency of the vehicle.

The utility model discloses a vehicle is further proposed.

According to the utility model discloses an electric drive system of vehicle includes: a motor; the speed reducer is in transmission connection with the motor; the control box is used for controlling the motor to work, a motor controller, a controller capacitor and a power control assembly are arranged in the control box, and the motor controller, the controller capacitor and the power control assembly are arranged in the radial direction of the control box.

According to the utility model discloses an electric drive system of vehicle, through with motor controller, controller electric capacity and power control assembly are integrated together, and motor controller, controller electric capacity and power control assembly arrange the setting in the radial direction of control box, compared with the prior art, when the control box sets up in the top of motor and reduction gear, can reduce electric drive system's height dimension, also can optimize the circuit arrangement between motor controller and the power control assembly, thereby can reduce the installation degree of difficulty of electric drive system in the vehicle, can also make electric drive system assemble more easily, and then can improve the production efficiency of vehicle.

In some examples of the invention, the power control assembly comprises: the control box is provided with a connecting port corresponding to the DC/DC converter and/or the vehicle-mounted charger and/or the power distribution unit.

In some examples of the invention, the power distribution unit comprises: the relay, first fuse and second fuse, the relay the first fuse with the second fuse is in the radial direction of control box arranges the setting.

In some examples of the present invention, the control box includes a control box housing, the control box housing defining an installation space, the motor controller, the controller capacitor and the power control assembly all being installed in the installation space; the control box shell limits a heat exchange flow channel, and the heat exchange flow channel is used for exchanging heat with the motor controller, the controller capacitor and the power control assembly.

The utility model discloses an in some examples, the control box casing be provided with control box refrigerant import and the control box refrigerant export of heat transfer runner intercommunication, the refrigerant passes through the control box refrigerant import is followed the heat transfer runner to the control box refrigerant export is mobile.

In some examples of the invention, the electric machine has a motor housing, the gear unit has a gear unit housing, the motor housing is connected to the gear unit housing, and a partial structure of the gear unit housing is designed as the motor housing.

In some examples of the invention, the output shaft of the motor and the input of the speed reducer are connected by a spline.

In some examples of the present invention, the motor has a motor housing, a cooling pipeline is provided in the motor housing, the cooling pipeline has a motor refrigerant inlet and a motor refrigerant outlet, the motor refrigerant inlet communicates with the control box refrigerant outlet.

In some examples of the invention, the connection port comprises: the direct current/direct current (DC/DC) port and/or a vehicle-mounted charger port and/or a Positive Temperature Coefficient (PTC) port and/or an alternating current (EAC) port, wherein the DC/DC port is connected with the DC/DC converter, the vehicle-mounted charger port is connected with the vehicle-mounted charger, the PTC port is connected with the first fuse through the relay, and the EAC port is connected with the second fuse.

According to the utility model discloses a vehicle, including foretell vehicle's electric drive system.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a top view of an electric drive system according to an embodiment of the present invention with an upper housing removed;

fig. 2 is a schematic diagram of a heat exchange flow path of an electric drive system according to an embodiment of the present invention;

fig. 3 is a schematic view of an electric drive system according to an embodiment of the present invention;

fig. 4 is a schematic view of another angle of an electric drive system according to an embodiment of the present invention;

fig. 5 is a cross-sectional view of an electric drive system according to an embodiment of the present invention;

fig. 6 is an exploded view of an electric drive system according to an embodiment of the present invention.

Reference numerals:

an electric drive system 100;

a motor 10; a motor housing 101; a connecting shaft 102; a connection hole 103; an output shaft 104; a motor refrigerant inlet 105; a motor coolant outlet 106;

a speed reducer 20; a reducer case 201; an input 202;

a control box 30; a motor controller 301; a controller capacitance 302; a power supply control component 303; a DC/DC converter 304; a vehicle-mounted charger 305; a power distribution unit 306; a relay 307; a first fuse 308; a second fuse 323; a control box housing 309; an installation space 310; a heat exchange flow channel 311; a control box refrigerant inlet 312; a control box refrigerant outlet 313; a DC/DC port 314; a vehicle charger port 315; a PTC port 316; EAC port 317; an upper housing 318; a lower housing 319; a side casing 320; a low voltage harness interface 321; a high voltage line 322.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

An electric drive system 100 for a vehicle according to an embodiment of the present invention is described below with reference to fig. 1-6, the electric drive system 100 being disposed in the vehicle.

As shown in fig. 1 to 6, an electric drive system 100 according to an embodiment of the present invention includes: the motor 10, the speed reducer 20 and the control box 30, the speed reducer 20 is in transmission connection with the motor 10, and the control box 30 is used for controlling the motor 10 to work. The motor 10 can output power after being powered on, the speed reducer 20 is in transmission connection with the motor 10, the power output by the motor 10 can be reduced and increased in torque through the speed reducer 20, the speed reducer 20 can be provided with two output ends, the two output ends can be connected with two half shafts of a vehicle respectively, one ends, far away from the speed reducer 20, of the two half shafts can be connected with wheels, the speed reducer 20 can distribute the power after the reduction and the increase in torque to the two half shafts through the two output ends, and the power can drive the wheels to rotate through the half shafts to drive the vehicle to run.

Further, the control box 30 may control the output power of the motor 10, and specifically, the control box 30 may control the magnitude of the torque of the output power of the motor 10, the rotation speed of the output shaft 104 of the motor 10, and the like, so that the driving force and the running speed of the vehicle may be adjusted. As shown in fig. 3 and 4, the control box 30 may be disposed above the motor 10, and the control box 30 may be detachably coupled to the motor 10.

In addition, a motor controller 301, a controller capacitor 302 and a power Control assembly 303 are disposed in the Control box 30, wherein the Control box 30 is provided with a low voltage harness interface 321, the low voltage harness interface 321 may be connected to the motor controller 301, the low voltage harness interface 321 is suitable for being connected to a low voltage Control line, the motor controller 301 may be in communication connection with a VCU (vehicle Control Unit-vehicle controller) controller of a vehicle through the low voltage Control line, and the VCU controller may Control the motor controller 301 to Control the motor 10 to operate. Through all setting up motor controller 301, controller electric capacity 302 and power control module 303 in control box 30, compare in installing motor controller 301, controller electric capacity 302 and power control module 303 dispersedly in the vehicle, the design can improve the integrated level of control box 30 like this, can make the structure of vehicle more compact to can make motor controller 301, controller electric capacity 302 and power control module 303 space that occupies in the vehicle littleer, also reduced the assembly degree of difficulty of vehicle.

In addition, the motor controller 301, the controller capacitor 302 and the power control assembly 303 are arranged in the radial direction of the control box 30, so that the size of the control box 30 in the radial direction can be increased, the size of the control box 30 in the height direction can be reduced, the circuit arrangement between the motor controller 301 and the power control assembly 303 can be optimized, the installation difficulty of the electric drive system 100 in a vehicle can be reduced, the electric drive system 100 can be assembled and disassembled for maintenance more easily, and the production efficiency and the maintenance efficiency of the vehicle are effectively improved.

Further, the motor controller 301, the controller capacitor 302 and the power control assembly 303 are arranged in the radial direction of the control box 30, so that the heat dissipation areas of the motor controller 301, the controller capacitor 302 and the power control assembly 303 can be increased, a large amount of heat generated by the motor controller 301, the controller capacitor 302 and the power control assembly 303 in the working process can be quickly conducted out of the control box 30, thereby avoiding overheating damage of all components in the control box 30, and further prolonging the service life of the electric drive system 100.

In some embodiments of the present invention, as shown in fig. 1, the power control component 303 may include: the DC/DC (direct current/direct current-direct current conversion) converter 304 and/or the vehicle-mounted charger 305 and/or the power distribution unit 306, that is, the power control module 303 may include at least one of the DC/DC converter 304, the vehicle-mounted charger 305, and the power distribution unit 306, the control box 30 is provided with a connection port corresponding to the DC/DC converter 304 and/or the vehicle-mounted charger 305 and/or the power distribution unit 306, and preferably, the DC/DC converter 304, the vehicle-mounted charger 305, and the power distribution unit 306 may be disposed in the control box 30, so that the integration level of the power control module 303 may be improved, and the entire vehicle structure may be more compact.

In some embodiments of the present invention, as shown in fig. 1, the connection port may include: preferably, the DC/DC port 314, the vehicle-mounted charger port 315, the PTC port 316, and/or the EAC (electric air conditioner) port may be disposed on the control box 30, and specifically, a plurality of connection ports may be disposed on an outer side of the control box 30, and each of the connection ports may be connected to an external connector, so as to electrically connect each component of the vehicle with a corresponding component in the control box 30.

Further, the DC/DC converter 304, the vehicle-mounted charger 305 and the power distribution unit 306 are all arranged in the radial direction of the control box 30, so that the height size of the control box 30 can be reduced, and the heat dissipation area of the DC/DC converter 304 and the vehicle-mounted charger 305 module can be increased, thereby avoiding the DC/DC converter 304 and the vehicle-mounted charger 305 from being damaged by overheating.

The DC/DC converter 304 may be connected to the DC/DC port 314. The DC/DC converter 304 can change the current of high voltage in the battery package into the current of low voltage, and the DC/DC converter 304 can be connected with devices such as the car light of vehicle through DC/DC port 314, in some specific embodiments of the utility model, the DC/DC converter 304 can export 12V voltage, and the DC/DC converter 304 can be for the power supply of the low voltage electrical part in the vehicle to can guarantee that the low voltage electrical part in the vehicle can normal use.

Also, the DC/DC converter 304 may be integrated into the same component as the onboard charger 305. The vehicle-mounted charger 305 may be connected to the vehicle-mounted charger port 315, the input 202 of the vehicle-mounted charger 305 may be connected to an external power source through the vehicle-mounted charger port 315, and the output of the vehicle-mounted charger 305 may be connected to a battery pack of a vehicle. The vehicle-mounted charger 305 may also be configured to stabilize the charging current between the external power source and the battery pack, so that the current and voltage of the charging current between the external power source and the battery pack can both meet the charging requirement of the battery pack, and the battery pack can be prevented from being burnt.

Meanwhile, the power distribution unit 306 may be connected to the PTC port 316, the EAC port 317, and the high-voltage harness port, respectively, and the PTC port 316, the EAC port 317, and the high-voltage harness port may be connected to a heater, an electric air conditioner, and a high-voltage line 322 of the vehicle, respectively, the battery pack may supply power to the heater and the electric air conditioner through the high-voltage line 322, the power distribution unit 306 is connected between the heater and the high-voltage line 322, and between the electric air conditioner and the high-voltage line 322, and the power distribution unit 306 may disconnect the circuit connection between the heater and the high-voltage line 322, and between the electric air conditioner and the high-voltage line 322 to prevent overload damage of the heater and the electric air conditioner of the vehicle or influence of functions of other components of the electric drive system 100 due to damage of the heater and the electric air conditioner.

In some embodiments of the present invention, as shown in fig. 1, the power distribution unit 306 may include: the relay 307, the first fuse 308, and the second fuse 323, the relay 307, the first fuse 308, and the second fuse 323 may be arranged in a radial direction of the control box 30, and the relay 307 and the fuse 308 may be spaced apart.

Also, the first fuse 308 may be connected to the PTC port 316 through the relay 307, the second fuse 323 may be connected to the EAC port 317, and when one of the heater and the electric air conditioner of the vehicle is overloaded, the second fuse 323 or the first fuse 308 corresponding to the overloaded one of the heater and the electric air conditioner may be disconnected, and the other one of the second fuse 308 and the first fuse 323 may be maintained to be connected, whereby it may be possible to ensure normal use of the un-overloaded one of the heater and the electric air conditioner. Moreover, the user only needs to repair the second fuse 323 or the first fuse 308, so that the difficulty of repairing the control box can be reduced, and the repair efficiency of the electric drive system 100 can be improved.

In some embodiments of the present invention, as shown in fig. 1-4, the control box 30 may include a control box housing 309, which is described in some embodiments of the present invention, the control box housing 309 may include an upper housing 318 and a lower housing 319, a side housing 320 may be sandwiched between the upper housing 318 and the lower housing 319, in some embodiments, the side housing 320 may be integrally formed with the upper housing 318, in other embodiments, as shown in fig. 3, the side housing 320 may be integrally formed with the lower housing 319, the control box housing 309 defines the installation space 310, and the upper housing 318 may open or close the installation space 310.

In addition, the motor controller 301, the controller capacitor 302 and the power control component 303 are all installed in the installation space 310, the control box housing 309 defines a heat exchange flow channel 311, and the heat exchange flow channel 311 is used for exchanging heat with the motor controller 301, the controller capacitor 302 and the power control component 303. When the motor controller 301, the controller capacitor 302 and the power control assembly 303 work, the heat generated by the motor controller 301, the heat generated by the controller capacitor 302 and the heat generated by the power control assembly 303 can respectively heat up the motor controller 301, the controller capacitor 302 and the power control assembly 303, and the temperature of the motor controller 301, the temperature of the controller capacitor 302 or the temperature of the power control assembly 303 is higher than the temperature of the refrigerant flowing in the heat exchange flow passage 311. The heat of the motor controller 301, the heat of the controller capacitor 302 and the heat of the power control component 303 can be transferred to the heat exchange flow channel 311 respectively, and then the heat exchange flow channel 311 can transfer the heat to a refrigerant, so that the temperature of the motor controller 301, the temperature of the controller capacitor 302 and the temperature of the power control component 303 can be reduced, and the motor controller 301, the controller capacitor 302 and the power control component 303 can be prevented from being damaged due to overheating. Moreover, the heat-exchanged refrigerant can flow out of the control box 30, and the refrigerant can lead out the heat in the control box 30, so that the temperature rise of the control box 30 caused by the accumulation of the heat in the control box 30 can be avoided.

Further, the heat exchange flow passage 311 may be connected to a hydraulic pump and a radiator, the hydraulic pump may drive a refrigerant to flow between the heat exchange flow passage 311 and the radiator, the refrigerant in the heat exchange flow passage 311 may flow to the radiator after exchanging heat with the motor controller 301, the controller capacitor 302, and the power control assembly 303, the radiator may exchange heat with the refrigerant, and heat in the refrigerant may be conducted to an external environment through the radiator, so that the temperature of the refrigerant may be reduced. The heat-dissipated refrigerant can flow to the heat exchange flow channel 311 to cool the motor controller 301, the controller capacitor 302 and the power control assembly 303, and the refrigerant is driven to circularly flow in the heat exchange flow channel 311 and the heat sink, so that the technical effect of preventing the motor controller 301, the controller capacitor 302 and the power control assembly 303 from being damaged due to overheating can be achieved, and the service life of each component in the control box 30 can be effectively prolonged.

Further, heat transfer runner 311 can be injectd to lower casing 319 in some specific embodiments of the utility model discloses a can injectd heat transfer runner 311 in the lower casing 319, heat transfer runner 311 does not open on the surface of lower casing 319, that is to say, heat transfer runner 311 can be constructed as the confined runner. However, the present invention is not limited to this, for example, as shown in fig. 2, in other embodiments of the present invention, the heat exchanging flow channel 311 may be disposed on the lower housing 319, and the heat exchanging flow channel 311 may be opened toward the motor controller 301, the controller capacitor 302 and the power control assembly 303, so that the heat exchanging flow channel 311 is easy to process, thereby reducing the production cost of the control box 30.

Moreover, the heat exchange flow channel 311 may have a plurality of open openings, and the plurality of open openings of the heat exchange flow channel 311 may be respectively corresponding to the motor controller 301, the controller capacitor 302, and the power control component 303, in some embodiments, the open opening of the heat exchange flow channel 311 may be provided with a cooling plate, and the cooling plate may close the open opening of the heat exchange flow channel 311, so as to prevent the refrigerant from permeating into the control box 30 to cause short circuit of each component in the control box 30. Also, the cooling plate may be in contact with the motor controller 301, the controller capacitor 302, and the power control assembly 303, respectively, to cause the heat exchange flow channel 311 to exchange heat with the motor controller 301, the controller capacitor 302, and the power control assembly 303, respectively.

In other embodiments, the motor controller 301, the controller capacitor 302 and the power control component 303 are respectively installed at a plurality of openings of the heat exchange flow channel 311, and the motor controller 301, the controller capacitor 302 and the power control component 303 can be directly contacted with the refrigerant in the heat exchange flow channel 311, so that the heat exchange efficiency between the heat exchange flow channel 311 and the motor controller 301, between the heat exchange flow channel 311 and the controller capacitor 302, and between the heat exchange flow channel 311 and the power control component 303 can be improved, and further, the motor controller 301, the controller capacitor 302 or the power control component 303 can be further prevented from being damaged due to overheating. It should be noted that the gaps between the motor controller 301 and the lower housing 319, the controller capacitor 302 and the lower housing 319, and the gap between the power control module 303 and the lower housing 319 are filled with the sealant, so that the sealant can prevent the refrigerant from permeating into the control box 30 from the gap between the motor controller 301 and the lower housing 319, the gap between the controller capacitor 302 and the lower housing 319, and the gap between the power control module 303 and the lower housing 319 to cause short circuits of the components in the control box 30, thereby improving the working reliability of the electric drive system 100.

In some embodiments of the present invention, as shown in fig. 1-4, the control box housing 309 may be provided with a control box refrigerant inlet 312 and a control box refrigerant outlet 313 which are communicated with the heat exchange flow channel 311, and the refrigerant flows from the heat exchange flow channel 311 to the control box refrigerant outlet 313 through the control box refrigerant inlet 312. The control box refrigerant inlet 312 and the control box refrigerant outlet 313 may be disposed on an outer side of the control box housing 309, the control box refrigerant inlet 312 and the control box refrigerant outlet 313 may protrude from a surface of the control box housing 309, the control box refrigerant inlet 312 and the control box refrigerant outlet 313 may be provided with pipe joints, and the pipe joints may be connected to a liquid pipeline to communicate the heat exchange flow passage 311 with the hydraulic pump and the radiator. Specifically, the control box refrigerant inlet 312 may be communicated with an output end of the hydraulic pump, and the control box refrigerant outlet 313 may be communicated with the heat sink, the hydraulic pump may drive the refrigerant to flow from the control box refrigerant inlet 312 toward the control box refrigerant outlet 313 so that the refrigerant guides heat of the control box 30, and the hydraulic pump may drive the refrigerant to flow from the control box refrigerant outlet 313 toward the heat sink so that the refrigerant dissipates heat, thereby achieving a technical effect of refrigerant circulation cooling.

In some embodiments of the present invention, as shown in fig. 3 and 4, the motor 10 may have a motor housing 101, the reducer 20 may have a reducer housing 201, the motor housing 101 is connected to the reducer housing 201, and a part of the reducer housing 201 is configured as the motor housing 101. Wherein, in the correlation technique, motor and reduction gear are independent part, connect through the bolt between motor and the reduction gear to can cause electric drive system's volume too big, also can lead to electric drive system's weight too big, still can cause spare part quantity on the electric drive system too much, and then can influence the miniaturization of vehicle, lightweight design requirement, also can influence electric drive system's manufacturing cost and production efficiency.

By configuring a part of the structure of the reducer housing 201 as the motor housing 101, the part of the structure of the reducer housing 201 can replace at least a part of the structure of the motor housing 101 in the prior art, so that the integrity of the electric drive system 100 can be improved, the overall weight of the electric drive system 100 can be reduced, the number of connecting members between the motor 10 and the reducer 20 can be reduced, the structure of the electric drive system 100 can be made more compact, the size and weight of the electric drive system 100 can be reduced, and the improvement of the production efficiency of the electric drive system 100 is facilitated.

In some embodiments of the present invention, as shown in fig. 5, the output shaft 104 of the motor 10 and the input 202 of the speed reducer 20 are connected by splines. Wherein the central axis of the output shaft 104 of the motor 10 may be collinear with the central axis of the input 202 of the reducer 20, and the output shaft 104 of the motor 10 and the input 202 of the reducer 20 may be oppositely disposed. One of the output shaft 104 of the motor 10 and the input end 202 of the reducer 20 may be provided with a connecting shaft 102, a circumferential side wall of the connecting shaft 102 may be provided with a spline, the other one of the output shaft 104 of the motor 10 and the input end 202 of the reducer 20 may be provided with a connecting hole 103, and a spline groove corresponding to the spline may be provided in the connecting hole 103. That is, the output shaft 104 of the motor 10 may be provided with the connecting shaft 102 and the input end 202 of the decelerator 20 may be provided with the connecting hole 103, or the input end 202 of the decelerator 20 may be provided with the connecting shaft 102 and the output shaft 104 of the motor 10 may be provided with the connecting hole 103.

The connecting shaft 102 may extend into the connecting hole 103, and the spline may extend into the spline groove, the spline is adapted to abut against a groove wall of the spline groove, when the output shaft 104 of the motor 10 rotates, the output shaft 104 may drive the spline to rotate, and the spline may push the groove wall of the spline groove, so as to drive the input end 202 of the speed reducer 20 to rotate. Therefore, the output shaft 104 of the motor 10 and the input end 202 of the speed reducer 20 are connected by a spline, so that the power generated by the motor 10 can be output to the speed reducer 20, the power can be transmitted to the wheels of the vehicle after being reduced and torque is increased by the speed reducer 20, and the vehicle can be driven to run by the power.

Compared with the prior art, the output shaft 104 of the motor 10 does not need to be provided with a gear transmission structure matched with the input end 202 of the speed reducer 20, so that the structure of the electric drive system 100 can be more compact, the weight of the electric drive system 100 can be further reduced, and the assembly space occupied by the electric drive system 100 on the vehicle can be smaller. In addition, the transmission parts between the motor 10 and the reducer 20 can be reduced, the transmission efficiency between the motor 10 and the reducer 20 can be improved, and the vehicle economy can be improved.

In some embodiments of the present invention, as shown in fig. 5 and fig. 6, the motor 10 may have a motor housing 101, a cooling pipeline may be disposed in the motor housing 101, the cooling pipeline has a motor refrigerant inlet 105 and a motor refrigerant outlet 106, and the motor refrigerant inlet 105 is communicated with the control box refrigerant outlet 313. When the control box 30 is disposed on the upper side of the motor 10, the motor refrigerant inlet 105 may be disposed at the upper end of the motor housing 101, the control box refrigerant outlet 313 may be disposed at the lower end of the control box 30, the motor refrigerant inlet 105 may be disposed opposite to the control box refrigerant outlet 313, both the motor refrigerant inlet 105 and the control box refrigerant outlet 313 may be provided with pipe joints, the pipe joints of the motor refrigerant inlet 105 may be in plug-in fit with the control box refrigerant outlet 313, such a design may not install a liquid pipe between the motor refrigerant inlet 105 and the control box refrigerant outlet 313, thereby further reducing the production cost of the vehicle.

And, the hydraulic pump can drive the coolant to flow through the control box coolant inlet 312, the control box coolant outlet 313, the motor coolant inlet 105 and the motor coolant outlet 106 in turn, the coolant can cool the motor controller 301, the controller capacitor 302 and the power supply control assembly 303 in the control box 30 in the heat exchanging channel 311 at first, the coolant after heat exchanging can flow into the cooling pipeline, the temperature of the coolant is lower than the temperature of the motor 10 at this moment, and the temperature of the coolant can be lower than the rated working temperature of the motor 10, the coolant after heat exchanging in the control box 30 can further cool the motor 10, thereby the working temperature of the motor 10 can be lower than the rated working temperature of the motor 10, the motor 10 can be prevented from being damaged by overheating, and the service life of the electric drive system 100 can be prolonged. Therefore, the heat exchange flow channel 311 is communicated with the cooling pipeline, a liquid pipeline is not required to be additionally arranged between the hydraulic pump and the motor 10 so as to enable the refrigerant to cool the motor 10, the pipeline arrangement between the hydraulic pump and the electric drive system 100 can be optimized, the assembly process of the vehicle can be simplified, and the assembly efficiency of the vehicle can be improved.

It should be noted that the heat generated by the motor 10 and the working temperature of the motor 10 are both higher than the heat and the working temperature generated by the motor controller 301, the controller capacitor 302 and the power control component 303 in the control box 30, when the flow of the refrigerant is controlled, the refrigerant should flow from the control box 30 toward the motor 10 to obtain a better cooling effect, and the refrigerant cannot flow from the motor 10 toward the control box 30, so as to avoid overheating and damaging each component in the control box 30 due to a poor cooling effect of the refrigerant in the control box 30.

According to the embodiment of the utility model provides a vehicle, including electric drive system 100 of above-mentioned embodiment, electric drive system 100 sets up in the vehicle, through motor controller 301 with in the electric drive system 100, controller electric capacity 302 and power control assembly 303 are integrated together, and motor controller 301, controller electric capacity 302 and power control assembly 303 arrange the setting in the radial direction of control box 30, compared with the prior art, when control box 30 sets up in the top of motor 10 and reduction gear 20, can reduce electric drive system 100's height dimension, also can optimize the circuit arrangement between motor controller 301 and the power control assembly 303, thereby can reduce the installation degree of difficulty of electric drive system 100 in the vehicle, can also make electric drive system 100 assemble more easily, and then can improve the production efficiency of vehicle.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric drive system for a vehicle, comprising:

a motor (10);

the speed reducer (20), the speed reducer (20) is connected with the motor (10) in a transmission way;

the control box (30), the control box (30) is used for controlling the motor (10) to work, be equipped with motor controller (301), controller electric capacity (302) and power control assembly (303) in the control box (30), motor controller (301), controller electric capacity (302) and power control assembly (303) are in the radial direction of control box (30) arranges the setting.

2. An electric drive system of a vehicle according to claim 1, characterized in that the power supply control assembly (303) comprises: the control box (30) is provided with a connecting port corresponding to the DC/DC converter (304) and/or the vehicle-mounted charger (305) and/or the power distribution unit (306).

3. An electric drive system of a vehicle according to claim 2, characterized in that the power distribution unit (306) comprises: the fuse protector comprises a relay (307), a first fuse (308) and a second fuse (323), wherein the relay (307), the first fuse (308) and the second fuse (323) are arranged in a radial direction of the control box (30).

4. The electric drive system of the vehicle of claim 2, characterized in that the control box (30) includes a control box housing (309), the control box housing (309) defining an installation space (310), the motor controller (301), the controller capacitor (302), and the power control assembly (303) all being mounted within the installation space (310);

the control box housing (309) defines a heat exchange flow channel (311), the heat exchange flow channel (311) being for exchanging heat with the motor controller (301), the controller capacitor (302) and the power control assembly (303).

5. The electric drive system of a vehicle according to claim 4, wherein the control box housing (309) is provided with a control box refrigerant inlet (312) and a control box refrigerant outlet (313) communicating with the heat exchange flow passage (311), and a refrigerant flows from the heat exchange flow passage (311) to the control box refrigerant outlet (313) through the control box refrigerant inlet (312).

6. An electric drive system of a vehicle according to claim 1, characterized in that the electric machine (10) has a machine housing (101), the retarder (20) has a retarder housing (201), the machine housing (101) is connected to the retarder housing (201), and a partial structure of the retarder housing (201) is designed as the machine housing (101).

7. An electric drive system of a vehicle according to claim 6, characterized in that the output shaft (104) of the electric machine (10) and the input (202) of the speed reducer (20) are splined.

8. The electric drive system of a vehicle according to claim 5, wherein the electric motor (10) has a motor housing (101), a cooling line is provided in the motor housing (101), the cooling line has a motor refrigerant inlet (105) and a motor refrigerant outlet (106), the motor refrigerant inlet (105) communicates with the control box refrigerant outlet (313).

9. The electric drive system of the vehicle of claim 3, wherein the connection port comprises: a DC/DC port (314) and/or an on-board charger port (315) and/or a PTC port (316) and/or an EAC port (317), wherein the DC/DC port (314) is connected with the DC/DC converter (304), the on-board charger port (315) is connected with the on-board charger (305), the PTC port (316) is connected with the first fuse (308) through the relay (307), and the EAC port (317) is connected with the second fuse (323).

10. A vehicle characterized by comprising an electric drive system of a vehicle according to any one of claims 1-9.