Power system and vehicle

Abstract

The utility model relates to a power system and a vehicle. The power system comprises a range extender, a first driving module and a second driving module, the first driving module comprises a first motor and a second motor, the first motor is used for driving a left front wheel, and the second motor is used for driving a right front wheel; the second driving module comprises a third motor and a fourth motor, the third motor is used for driving a left rear wheel, and the fourth motor is used for driving a right rear wheel; at least one of the first motor, the second motor, the third motor and the fourth motor is a hub motor, and the hub motor is installed in a wheel driven by the hub motor. The range extender is used for driving the left front wheel and the right front wheel; or the range extender is used for driving the left rear wheel and the right rear wheel. The hub motor can not occupy (or reduce) the space of the vehicle body, so that the model selection and arrangement of other parts mounted on the vehicle body are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and particularly relates to a power system and a vehicle. Background Art

[0002] In recent years, range-extended electric vehicles have become more and more popular. Among them, compared with traditional vehicles, four-wheel independent drive electric vehicles eliminate mechanical transmission components such as clutches, transmissions, and differentials, thus simplifying the structure of the whole vehicle, reducing the weight of the whole vehicle, and at the same time, improving the flexibility of the layout of the power transmission system to improve the transmission efficiency.

[0003] As Figure 1 shown, in the related art, both the front and rear wheels of a four-wheel independent drive vehicle are driven by distributed electric drive assemblies. However, this setting method will occupy a large amount of space in the vehicle body, which is not conducive to the selection and layout of other components installed on the vehicle body. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: aiming at the problem that the setting method of driving both the front and rear wheels of a four-wheel independent drive vehicle by distributed electric drive assemblies in the related art will occupy a large amount of space in the vehicle body, a power system and a vehicle are provided.

[0005] To solve the above problems, on the one hand, an embodiment of the utility model provides a power system, including a range extender, a first drive module and a second drive module; the first drive module includes a first motor and a second motor, the first motor is used to drive the left front wheel, and the second motor is used to drive the right front wheel; the second drive module includes a third motor and a fourth motor, the third motor is used to drive the left rear wheel, and the fourth motor is used to drive the right rear wheel; at least one of the first motor, the second motor, the third motor and the fourth motor is a hub motor, and the hub motor is installed in the wheel driven by it; the range extender is used to drive the left front wheel and the right front wheel; or, the range extender is used to drive the left rear wheel and the right rear wheel.

[0006] Optionally, at least one of the first motor and the second motor is a hub motor, and the range extender is installed in the front engine compartment.

[0007] Optionally, at least one of the third motor and the fourth motor is installed on the vehicle body and is located between the left rear wheel and the right rear wheel.

[0008] Optionally, the first motor is a hub motor, and the first motor is installed in the left front wheel; the first drive module further includes a first controller, the first controller is electrically connected to the first motor, and the first controller is located in the left front wheel; and / or, the second motor is a hub motor, and the second motor is installed in the right front wheel; the first drive module further includes a second controller, the second controller is electrically connected to the second motor, and the second controller is located in the right front wheel.

[0009] Optionally, the first drive module further includes a first controller and a second controller; the first controller is electrically connected to the first motor, and the second controller is electrically connected to the second motor; the first controller and the second controller are separately arranged or integrated into one body.

[0010] Optionally, both the third motor and the fourth motor are installed on the vehicle body and are both located between the left rear wheel and the right rear wheel. The third motor is connected to the left rear wheel through a first drive half shaft, and the fourth motor is connected to the right rear wheel through a second drive half shaft.

[0011] Optionally, the second drive module further includes a third controller. The third controller is a dual-motor controller, and the third controller is electrically connected to the third motor and the fourth motor respectively.

[0012] Optionally, the range extender includes an engine and a generator, and the engine is connected to the generator; the generator is electrically connected to at least one of the first motor, the second motor, the third motor, and the fourth motor.

[0013] Optionally, the power system further includes a power battery. The power battery is respectively connected to the range extender, the first drive module, and the second drive module; the power battery is installed on the vehicle body, and the power battery is located between the range extender and the second drive module in the front-rear direction of the vehicle.

[0014] To solve the above problems, on the other hand, an embodiment of the present invention further provides a vehicle, including a vehicle body, a left front wheel, a right front wheel, a left rear wheel, a right rear wheel, and the power system according to any one of the above; the left front wheel, the right front wheel, the left rear wheel, and the right rear wheel are all installed on the vehicle body.

[0015] Optionally, the maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the left front wheel; the maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the right front wheel.

[0016] Optionally, the vehicle further includes a rear subframe, which is mounted on the vehicle body, and both the third motor and the fourth motor are mounted on the rear subframe.

[0017] In the power system and the vehicle provided by the embodiments of the present invention, at least one of the first motor, the second motor, the third motor, and the fourth motor is set as a hub motor. The hub motor can not occupy (or reduce the occupation of) the vehicle body space, thereby facilitating the selection and arrangement of other components mounted on the vehicle body. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a power system in the related art;

[0019] Figure 2 is a schematic structural diagram of a power system provided by an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a power system provided by another embodiment of the present invention.

[0021] Reference Signs:

[0022] 100, power system; 200, left front wheel; 300, right front wheel; 400, left rear wheel; 500, right rear wheel; 600, vehicle body;

[0023] 1, range extender; 11, engine; 12, generator; 13, fourth controller;

[0024] 2, first drive module; 20, control unit; 21, first motor; 22, second motor; 23, first controller; 24, second controller;

[0025] 3, second drive module; 31, third motor; 32, fourth motor; 33, third controller; 34, first transmission mechanism; 35, second transmission mechanism; 36, first drive half shaft; 37, second drive half shaft;

[0026] 4, power battery. Detailed Embodiments

[0027] In order to make the technical problems, technical solutions, and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] As Figure 2As shown, in one embodiment, the power system 100 includes a range extender 1, a first drive module 2, and a second drive module 3. Among them, the first drive module 2 includes a first motor 21 and a second motor 22. The first motor 21 is used to drive the left front wheel 200, and the second motor 22 is used to drive the right front wheel 300. The second drive module 3 includes a third motor 31 and a fourth motor 32. The third motor 31 is used to drive the left rear wheel 400, and the fourth motor 32 is used to drive the right rear wheel 500. At least one of the first motor 21, the second motor 22, the third motor 31, and the fourth motor 32 is a hub motor, and the hub motor is installed inside the wheel it drives. The range extender 1 is used to drive the left front wheel 200 and the right front wheel 300; or the range extender is used to drive the left rear wheel 400 and the right rear wheel 500.

[0029] In this embodiment, the first drive module 2 is used to drive the two front wheels of the vehicle to rotate, and the second drive module 3 is used to drive the two rear wheels of the vehicle to rotate. At least one of the first motor 21 and the second motor 22 is set as a hub motor. The hub motor may not occupy (or reduce the occupation of) the body space, so that the body can have a larger space to arrange other components, which is beneficial to the selection and arrangement of other components installed on the vehicle body.

[0030] As Figure 2 shown, in one embodiment, at least one of the first motor 21 and the second motor 22 is a hub motor, and the range extender 1 is installed in the front engine compartment of the vehicle body 600. In this way, the front engine compartment can have a larger space to arrange the range extender 1, which is beneficial to the selection and arrangement of the range extender 1.

[0031] In one embodiment, both the first motor 21 and the second motor 22 are hub motors. At this time, the first motor 21 is installed inside the left front wheel 200, and the second motor 22 is installed inside the right front wheel 300. This can further reduce the space occupied by the first drive module in the front engine compartment, so that the front engine compartment can have a larger space to arrange the range extender 1.

[0032] In addition, the first motor 21 and the second motor 22 can adopt the same setting.

[0033] As Figure 2 shown, in one embodiment, at least one of the third motor 31 and the fourth motor 32 is installed on the vehicle body 600 and is located between the third motor and the fourth motor at the left rear wheel 400 and the right rear wheel 500.

[0034] Specifically, the third motor 31 is installed on the vehicle body, and the third motor 31 is located between the left rear wheel 400 and the right rear wheel 500, which facilitates the design of the cooling system for cooling the third motor 31. Moreover, this also facilitates the selection of the motor and the improvement of its performance. Alternatively, the fourth motor 32 is installed on the vehicle body, and the fourth motor 32 is located between the left rear wheel 400 and the right rear wheel 500, which facilitates the design of the cooling system for cooling the fourth motor 32. Moreover, this also facilitates the selection of the motor and the improvement of its performance. Alternatively, both the third motor 31 and the fourth motor 32 are installed on the vehicle body, and both the third motor 31 and the fourth motor 32 are located between the left rear wheel 400 and the right rear wheel 500, which facilitates the design of the cooling system for cooling the third motor 31 and the fourth motor 32, and is conducive to the selection and performance improvement of both.

[0035] Moreover, such an arrangement can also reduce the increase in unsprung mass. When the vehicle adopts the power system 100 of this embodiment, the comfort performance of the vehicle can be improved, and at the same time, the handling performance, acceleration performance, and braking performance of the vehicle can also be improved.

[0036] In addition, the third motor 31 and the fourth motor 32 can be arranged in the same way.

[0037] As Figure 2 shown, in one embodiment, the first drive module 2 further includes a first controller 23. The first controller 23 is electrically connected to the first motor 21, and the first controller 23 is located inside the left front wheel 200. Among them, the first controller 23 is used to control the operation of the first motor 21. By arranging the first controller 23 inside the left front wheel 200, the first controller 23 does not occupy (or occupies less) the space of the vehicle body.

[0038] As Figure 2 shown, in one embodiment, the first drive module 2 further includes a second controller 24. The second controller 24 is electrically connected to the third motor 31, and the second controller 24 is located inside the right front wheel 300. Among them, the second controller 24 is used to control the operation of the third motor 31. By arranging the second controller 24 inside the right front wheel 300, the second controller 24 does not occupy (or occupies less) the space of the vehicle body.

[0039] In one embodiment, the first controller 23 and the second controller 24 can be arranged in the same way.

[0040] As Figure 2 shown, in one embodiment, the second drive module 3 is a distributed electric drive assembly, and the third motor 31 and the fourth motor 32 can be arranged in sequence along the width direction of the vehicle. Among them, in the width direction of the vehicle, the third motor 31 can be located between the fourth motor 32 and the left rear wheel 400.

[0041] As Figure 2 shown, in one embodiment, the second drive module 3 further includes a third controller 33. The third controller 33 is a dual-motor controller, and the third controller 33 is electrically connected to the third motor 31 and the fourth motor 32 respectively. Among them, the third controller 33 is used to control the operation of the third motor 31, and the third controller 33 is also used to control the operation of the fourth motor 32. In addition, the third controller 33 can be installed on the vehicle body 600. Among them, the dual-motor controller is equivalent to the above control unit, that is, the controllers for controlling the third motor 31 and the fourth motor 32 are integrated together. Of course, in other scenarios, the controllers for controlling the third motor 31 and the fourth motor 32 can also be separately arranged.

[0042] As Figure 2 shown, in one embodiment, the second drive module 3 further includes a first transmission mechanism 34. The third motor 31 is connected to the left rear wheel 400 through the first transmission mechanism 34, which makes the arrangement of the third motor 31 more convenient. Among them, the first transmission mechanism 34 may include a speed reducer.

[0043] In addition, in addition to including a speed reducer, the first transmission mechanism 34 may further include a gear set. The driving gear of the gear set is connected to the output shaft of the speed reducer, and the driven gear of the gear assembly is connected to the left rear wheel 400. The torque of the third motor 31 is first transmitted to the speed reducer, then from the speed reducer to the gear set, and then from the gear set to the left rear wheel 400, thereby driving the left rear wheel 400 to rotate around its own axis.

[0044] As Figure 2 shown, in one embodiment, the second drive module 3 further includes a second transmission mechanism 35. The fourth motor 32 is connected to the right rear wheel 500 through the second transmission mechanism 35, which makes the arrangement of the fourth motor 32 more convenient. Among them, the structure of the second transmission mechanism 35 and the first transmission mechanism 34 may be the same. The way the second transmission mechanism 35 connects the fourth motor 32 and the right rear wheel 500 may be the same as the way the first transmission mechanism 34 connects the third motor 31 and the left rear wheel 400.

[0045] In addition, as Figure 2 shown, the third motor 31 is connected to the left rear wheel 400 through a first drive half shaft 36, and the fourth motor 32 is connected to the right rear wheel 500 through a second drive half shaft 37. During operation, the power of the third motor 31 is transmitted to the left rear wheel 400 through the first drive half shaft 36, and the power of the fourth motor 32 is transmitted to the right rear wheel 500 through the second drive half shaft 37.

[0046] As Figure 2As shown, in one embodiment, the range extender 1 includes an engine 11 and a generator 12. The engine 11 is connected to the generator 12. Specifically, the crankshaft of the engine 11 is connected to the rotor of the generator 12. Among them, the crankshaft of the engine 11 and the rotor of the generator 12 can be rigidly connected. For example, they can be connected together through a coaxial coupler or the like. Or, the crankshaft of the engine 11 and the rotor of the generator 12 can also be shock-absorbingly connected. In this case, they can be connected together through a shock absorber.

[0047] In addition, the range extender 1 further includes a fourth controller 13. The fourth controller 13 is electrically connected to the generator 12 and is used to control the operation of the generator 12. Among them, the fourth controller 13 and the generator 12 can be integrally arranged or separately arranged.

[0048] Among them, the integrated arrangement of the fourth controller 13 and the generator 12 may mean that the fourth controller 13 and the generator 12 are integrated in one housing.

[0049] As Figure 2 As shown, in one embodiment, the power system 100 further includes a power battery 4. The power battery 4 is respectively connected to the range extender 1, the first drive module, and the second drive module 3. Specifically, the generator 12, the first motor 21, the third motor 31, the second motor 22, the fourth motor 32, etc. can all be connected to the power battery 4.

[0050] In addition, the power battery 4 is installed on the vehicle body 600. And in the front-rear direction of the vehicle body 600, the power battery 4 is located between the range extender 1 and the second drive module 3. Among them, the front-rear direction of the vehicle body 600 is the front-rear direction of the vehicle, and the power battery 4 can be installed on the vehicle body 600.

[0051] It should be understood that the power battery 4 is electrically connected to the range extender 1, the first drive module, and the second drive module 3 respectively. Among them, the electric energy generated by the generator 12 can charge the power battery 4, and the power battery 4 can supply power to the first motor 21, the third motor 31, the second motor 22, the fourth motor 32, etc.

[0052] In one embodiment, the first motor 21, the second motor 22, the third motor 31, and the fourth motor 32 can also generate electricity, and the electric energy generated by the four can charge the power battery 4.

[0053] In addition, the generator 12 is electrically connected to at least one of the first motor 21, the second motor 22, the third motor 31, and the fourth motor 32. When the power battery 4 is fully charged, the motor among the first motor 21, the second motor 22, the third motor 31, and the fourth motor 32 that is electrically connected to the generator 12 can supply the electric energy it generates to the generator 12, enabling the generator 12 to drive the engine 11 to idle, thereby consuming energy and effectively preventing the motor electrically connected to the generator 12 from overheating and being damaged.

[0054] The present utility model further provides a vehicle, which includes a left front wheel 200, a right front wheel 300, a left rear wheel 400, a right rear wheel 500, a vehicle body 600, and the power system 100 described in any one of the above embodiments. The left front wheel 200, the right front wheel 300, the left rear wheel 400, and the right rear wheel 500 are all mounted on the vehicle body 600.

[0055] In one embodiment, the maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the left front wheel; the maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the right front wheel.

[0056] Among them, the maximum torque of the left rear wheel refers to the maximum torque that the power system can provide to the left rear wheel when driving the left rear wheel. The maximum torque of the right rear wheel refers to the maximum torque that the power system can provide to the right rear wheel when driving the right rear wheel. The maximum torque of the left front wheel refers to the maximum torque that the power system can provide to the left front wheel when driving the left front wheel. The maximum torque of the right front wheel refers to the maximum torque that the power system can provide to the right front wheel when driving the right front wheel.

[0057] In one embodiment, the vehicle further includes a rear subframe. Among them, the rear subframe is connected to the rear end of the vehicle body, and the second drive module 3 can be mounted on the rear subframe, that is, the third motor 31, the fourth motor 32, the third controller 33, the first transmission mechanism 34, the second transmission mechanism 35, etc. can all be mounted on the rear subframe.

[0058] In one embodiment, the vehicle further includes a front subframe. The front subframe is connected to the front end of the vehicle body 600, and the range extender 1 can be mounted on the front subframe.

[0059] When the first drive module 2 includes the first motor 21 and the second motor 22, the second drive module 3 includes the third motor 31 and the fourth motor 32, and both the first motor 21 and the second motor 22 are hub motors, and the third motor 31 and the fourth motor 32 are both mounted on the vehicle body 600, the vehicle can have the following working modes.

[0060]

[0061]

[0062] I. When the vehicle is in the P gear for parking and in the Keyon or Ready state:

[0063] 1. Obtain the remaining power (SOC) value of the power battery 4. When the remaining power (SOC) of the power battery 4 is lower than the first SOC threshold, control the generator 12 of the range extender 1 to start the engine 11. After the engine 11 starts, control it to operate in the lowest fuel consumption range, drive the generator 12 to charge the power battery 4, and at this time, the vehicle operates in the P gear parking power generation mode.

[0064] 2. When the remaining power of the power battery 4 is higher than the second SOC threshold, turn off the engine 11 and stop charging.

[0065] II. When the vehicle is in the D gear for driving:

[0066] By obtaining parameters such as the accelerator pedal opening value, the remaining power value (SOC) of the power battery 4, the vehicle speed value, the brake pedal depth value, and the motor stator temperature value, comprehensively judge the state in which each component can operate in the optimal working range, and control the vehicle to be in the best working mode to obtain the best performance.

[0067] Among them: 1. When the remaining power (SOC) of the power battery 4 is higher than the third SOC threshold, considering that the vehicle needs to have a certain pure electric driving range, control the vehicle to operate in the pure electric driving mode, and the driving torque of the front hub motor and the rear distributed electric drive assembly is distributed front and rear according to the principle of optimal efficiency.

[0068] 2. When the remaining power (SOC value) of the power battery 4 is lower than the third SOC threshold, the power of the power battery 4 is insufficient, and the engine 11 should be started to enter the range extender driving mode. By decoupling the relationship between the engine 11 speed and the vehicle speed, increase the speed of the engine 11 so that the engine 11 can output as much power as possible for power generation, supplement the power of the power battery 4 and drive the vehicle at the same time, or directly give all the generated power to the drive motor to drive the vehicle; the front hub motor (the first motor 21 and the second motor 22) and the rear distributed electric drive assembly (the third motor 31 and the fourth motor 32) drive the vehicle at the same time, and the driving torque is distributed front and rear according to the principle of optimal efficiency. At this time, the vehicle operates in the range extender four-wheel independent pure electric driving mode.

[0069] It should be understood that the above related settings can also be replaced by other methods, such as:

[0070] In other embodiments, the range extender 1 can also be arranged at the rear end of the vehicle body. In this case, the range extender 1 can be used to drive the left rear wheel and the right rear wheel. The range extender 1 being arranged at the rear end of the vehicle body means that in the front-rear direction of the vehicle, the range extender 1 is arranged behind the power battery 4. In this embodiment, both the third motor 31 and the fourth motor 32 can be in-wheel motors, and both the first motor 21 and the second motor 22 are arranged on the vehicle body and located between the left front wheel 200 and the right front wheel 300.

[0071] As Figure 3 shown, in other embodiments, the first controller 23 and the second controller 24 can also be integrated into one body. Assume that in this embodiment, the first controller 23 and the second controller 24 are integrated into a control unit 20, and the control unit 20 can be arranged in the front engine compartment. In addition, the integration of the first controller 23 and the second controller 24 into one body can mean that the first controller 23 and the second controller 24 are installed in the same housing; or, it can also mean that the first controller 23 and the second controller 24 are arranged on the same circuit board. It should be understood that the first controller 23 and the second controller 24 can also be separately arranged. Among them, the above-mentioned first controller 23 is arranged in the left front wheel 200, and the second controller 24 is arranged in the right front wheel 300, which represents the separate arrangement of the first controller 23 and the second controller 24; of course, when the first controller 23 and the second controller 24 are separately arranged, they can also be arranged in positions such as the front engine compartment.

[0072] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0073] The above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power system, characterized in that: It includes a range extender, a first drive module and a second drive module; The first driving module includes a first motor and a second motor, the first motor is used to drive the left front wheel, and the second motor is used to drive the right front wheel; The second driving module includes a third motor and a fourth motor, the third motor is used to drive the left rear wheel, and the fourth motor is used to drive the right rear wheel; At least one of the first motor, the second motor, the third motor and the fourth motor is a hub motor, and the hub motor is installed in a wheel driven by the hub motor; The range extender is used to drive the left front wheel and the right front wheel; or, the range extender is used to drive the left rear wheel and the right rear wheel.

2. The power system according to claim 1, characterized in that: At least one of the first motor and the second motor is a hub motor, and the range extender is installed in the front cabin.

3. The power system according to claim 2, characterized in that: At least one of the third motor and the fourth motor is mounted on the vehicle body and is located between the left rear wheel and the right rear wheel.

4. The power system according to claim 1, characterized in that: The first motor is a hub motor, and the first motor is installed in the left front wheel; the first drive module also includes a first controller, the first controller is electrically connected to the first motor, and the first controller is located in the left front wheel; and / or, The second motor is a hub motor, and the second motor is installed in the right front wheel; the first drive module also includes a second controller, the second controller is electrically connected to the second motor, and the second controller is located in the right front wheel.

5. The power system according to claim 1, characterized in that: The third motor and the fourth motor are both mounted on the vehicle body and are both located between the left rear wheel and the right rear wheel. The third motor is connected to the left rear wheel via a first drive half shaft, and the fourth motor is connected to the right rear wheel via a second drive half shaft.

6. The power system according to claim 1, characterized in that: The range extender comprises an engine and a generator, wherein the engine is connected to the generator; The generator is electrically connected to the first motor, the second motor, the third motor and the fourth motor respectively.

7. The power system according to claim 1, characterized in that: The power system further includes a power battery, wherein the power battery is connected to at least one of the range extender, the first drive module, and the second drive module; The power battery is installed on the vehicle body, and the power battery is located between the range extender and the second drive module in the front-rear direction of the vehicle.

8. A vehicle, characterized in that: Comprising a vehicle body, a left front wheel, a right front wheel, a left rear wheel, a right rear wheel and a power system according to any one of claims 1 to 7; The left front wheel, the right front wheel, the left rear wheel and the right rear wheel are all mounted on the vehicle body.

9. The vehicle according to claim 8, characterized in that The maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the left front wheel; The maximum torque of the left rear wheel and the maximum torque of the right rear wheel are both greater than the maximum torque of the right front wheel.

10. The vehicle according to claim 8, characterized in that The vehicle further comprises a rear subframe, wherein the rear subframe is mounted on the vehicle body, and the third motor and the fourth motor are both mounted on the rear subframe.

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