New energy series-parallel power system, vehicle and control method

Abstract

The invention provides a new energy series-parallel power system, a vehicle and a control method. The new energy series-parallel power system comprises an engine; the generator is in transmission connection with an output shaft of the engine; the input end of the gearbox is in transmission connection with an output shaft of the engine, and the output end of the gearbox is used for being in transmission connection with a main speed reducer; an output shaft of the main drive motor is hollowly sleeved on an output shaft of the auxiliary drive motor, an output shaft of the auxiliary drive motor is in coupling transmission connection with an output shaft of the generator through a main clutch, and the output shafts of the main drive motor and the auxiliary drive motor are selectively in transmission connection with a gear shifting gear set in the gearbox; the first end of the double-control motor controller and the first end of the main drive motor controller are both electrically connected with the power battery, the second end of the double-control motor controller is electrically connected with the generator and the auxiliary drive motor, and the second end of the main drive motor controller is electrically connected with the main drive motor.

Description

Technical Field

[0001] The present disclosure belongs to the field of vehicle technology, and specifically relates to a new energy hybrid power system, a vehicle and a control method. Background Art

[0002] At present, the power configuration used by hybrid mining trucks in the industry is mainly the extended-range hybrid system. As a series hybrid system configuration, this system has the advantages of simple structure, low control complexity, and high system reliability. The disadvantages of this configuration are poor fuel economy, high system cost, short power battery life, and poor safety. The extended-range system requires the engine to drive the generator to generate electricity, and then drive the vehicle through the drive motor. The extended-range system has significant efficiency losses in the energy conversion process, and the system has poor fuel economy. The main business scenarios of open-pit mines are coal mining and earthwork stripping. The proportion of heavy-load climbing conditions is high. The power demand of the whole vehicle is large when climbing. The generator and drive motor of the extended-range system need to match a larger power, resulting in a significant increase in system cost. In order to improve the fuel economy of the extended-range system, it is necessary to match a large-capacity power battery for system energy balance. Therefore, the battery has a high frequency of charging and discharging and a large amount of charging and discharging, resulting in a short life of the power battery.

[0003] The extended-range system currently used in the industry is matched with a 3AMT gearbox, but this gearbox has power interruption during the gear shifting process and there is a risk of slipping when shifting gears during climbing.

[0004] Therefore, how to solve the above problems has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The present disclosure aims to solve at least one of the technical problems existing in the prior art and to provide a new energy hybrid power system, a vehicle and a control method.

[0006] A first aspect of an embodiment of the present disclosure provides a new energy hybrid power system, including: an engine;

[0007] A generator, the generator is drivingly connected to an output shaft of the engine;

[0008] A gearbox, wherein the input end of the gearbox is drivingly connected to the output shaft of the engine, and the output end of the gearbox is used for drivingly connecting to the main reducer;

[0009] A main drive motor and an auxiliary drive motor, wherein the output shaft of the main drive motor is loosely sleeved on the output shaft of the auxiliary drive motor, the output shaft of the auxiliary drive motor is coupled and transmission-connected with the output shaft of the generator through a main clutch, and the output shafts of the main drive motor and the auxiliary drive motor are selectively transmission-connected with a shift gear set in the gearbox;

[0010] A dual-control motor controller, a main drive motor controller and a power battery, wherein the first end of the dual-control motor controller and the first end of the main drive motor controller are both electrically connected to the power battery, the second end of the dual-control motor controller is electrically connected to the generator and the auxiliary drive motor respectively, and the second end of the main drive motor controller is electrically connected to the main drive motor.

[0011] Optionally, the gearbox further includes a coupler, and the coupler is used to selectively couple the main drive motor with the auxiliary drive motor.

[0012] Optionally, the gearbox includes a first shift gear set and a second shift gear set;

[0013] When the coupler couples the main drive motor with the auxiliary drive motor, the output shafts of the main drive motor and the auxiliary drive motor are coupled with the first shift gear set or the second shift gear set.

[0014] Optionally, the gearbox includes a first shift shaft, a second shift shaft arranged in parallel with the first shift shaft, and a shift device arranged on the first shift shaft;

[0015] The first shift shaft is connected to the first shift gear set or the second shift gear set through the shift device, the output end of the first shift shaft is connected to the main reducer; the second shift shaft is connected to the main drive motor;

[0016] In a direction from the input end of the first shift shaft to the output end, the second shift gear set and the first shift gear set are arranged in sequence and are coupled to the first shift shaft and the second shift shaft respectively;

[0017] The shifting device is used for shifting the first shifting gear set and / or the second shifting gear set.

[0018] Optionally, the shifting device comprises: at least one first clutch and / or at least one second clutch;

[0019] The first clutch is respectively arranged between the corresponding shift gears in the first shift gear set and the second shift gear set;

[0020] The second clutch is disposed between adjacent shift gears of the first shift gear set and the second shift gear set.

[0021] Optionally, the first shift gear set includes a first driving gear set disposed on the first shift shaft, and a first driven gear set loosely sleeved on the second shift shaft and meshing with the first driving gear set;

[0022] The second shift gear set includes a second driving gear set loosely mounted on the first shift shaft, and a second driven gear set fixed to the second shift shaft and meshing with the second driving gear set.

[0023] Optionally, a transmission gear is provided at the input end of the second shift shaft, and the transmission gear is used to mesh with the output gear of the main drive motor to achieve transmission connection between the main drive motor and the second shift shaft.

[0024] According to a second aspect of an embodiment of the present disclosure, a vehicle is provided, comprising the new energy hybrid power system described above.

[0025] A third aspect of the embodiments of the present disclosure provides a new energy hybrid power control method, the control method is implemented according to the new energy hybrid power system described above, and the method includes:

[0026] Collecting the real-time speed of a vehicle while it is traveling, wherein the vehicle includes a new energy hybrid power system, and the new energy hybrid power system includes a main drive motor, an auxiliary drive motor, an engine, and a generator;

[0027] If the real-time vehicle speed is lower than a first threshold, controlling the main clutch of the vehicle to be disengaged so that the main drive motor and the auxiliary drive motor drive the vehicle;

[0028] If the real-time vehicle speed is greater than a second threshold, the generator is controlled to adjust the speed of the engine to within the speed range of the auxiliary drive motor, and the main clutch is controlled to engage so that the engine directly drives the vehicle.

[0029] Furthermore, after controlling the clutch to engage, the method further includes:

[0030] Obtain the total required power of the vehicle;

[0031] If the output power of the engine is less than or equal to the total required power, controlling the main drive motor and the auxiliary drive motor to jointly drive the vehicle;

[0032] If the output power of the engine is greater than the total required power, the generator is controlled to charge the power battery of the vehicle.

[0033] Optionally, the new energy hybrid power system further includes a gearbox, a coupler and a shifting device, the gearbox includes a first shifting gear set and a second shifting gear set, and the method further includes:

[0034] receiving a gear shift request, and controlling the coupler so that the main drive motor and the auxiliary drive motor are in a non-coupled connection state;

[0035] Based on the target gear to be engaged, controlling the shift device to engage the first shift gear set and / or the second shift gear set with the shift gear corresponding to the target gear;

[0036] Wherein, based on the completion of the engagement of the target gear to be engaged, the shift device disengages the shift gear corresponding to the current gear.

[0037] The beneficial effects of the embodiments of the present disclosure include:

[0038] In the present invention, the main drive motor output shaft is loosely sleeved on the auxiliary drive motor output shaft so that the main drive motor and the auxiliary drive motor can work independently or in coordination, and the main drive motor and the auxiliary drive motor are controlled by the dual-control motor controller and the main drive motor controller, as well as the main drive motor and the auxiliary drive motor are selectively connected to the shifting gear set, so that the power output can be maintained uninterrupted during the gear shifting. This arrangement improves the smoothness and safety of vehicle driving, especially in application scenarios that require continuous power (such as heavy-load climbing in mines). BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a structural schematic diagram of a new energy hybrid power system according to an embodiment of the present disclosure;

[0040] Figure 2 This is a structural schematic diagram of a new energy hybrid power system according to another embodiment of the present disclosure;

[0041] Figure 3 The present invention is a flowchart of a new energy hybrid power control method according to another embodiment of the present invention.

[0042] In the figure, 1. engine; 2. generator; 3. gearbox; 4. auxiliary drive motor; 5. main drive motor; 6. dual-control motor controller; 7. main drive motor controller; 8. power battery; 9. coupler; 10. torsional vibration damper; 11. main clutch; 31. first shift gear set; 32. second shift gear set; 33. first shift shaft; 34. second shift shaft; 35. transmission gear; 36. first clutch; 37. second clutch; 311. second gear shift gear set; 312. fourth gear shift gear set; 313. sixth gear shift gear set; 321. first gear shift gear set; 322. third gear shift gear set; 323. fifth gear shift gear set. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments. In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not vertical in the strict sense, but within the error tolerance range. "Parallel" is not parallel in the strict sense, but within the error tolerance range.

[0045] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0046] like Figure 1-2 As shown, a new energy hybrid power system includes: an engine 1, a generator 2, a gearbox 3, a main drive motor 5, an auxiliary drive motor 4, a dual-control motor controller 6, a main drive motor controller 7 and a power battery 8. The generator 2 is connected to the output shaft of the engine 1 by driving, the input end of the gearbox 3 is connected to the output shaft of the engine by driving, and the output end of the gearbox 3 is used to be connected to the main reducer by driving.

[0047] The output shaft of the main drive motor 5 is loosely sleeved on the output shaft of the auxiliary drive motor 4, and the output shaft of the auxiliary drive motor 4 is coupled and transmission connected with the output shaft of the generator 2 through the main clutch 11. The output shafts of the main drive motor 5 and the auxiliary drive motor 4 are selectively transmission connected with the shift gear set in the gearbox 3.

[0048] The dual-control motor controller 6, the main drive motor controller 7 and the power battery 8, the first end of the dual-control motor controller 6 and the first end of the main drive motor controller 7 are both electrically connected to the power battery 8, the second end of the dual-control motor controller 6 is electrically connected to the generator 2 and the auxiliary drive motor 4 respectively, and the second end of the main drive motor controller 7 is electrically connected to the main drive motor 5. Among them, the dual-control motor controller 6 is responsible for managing the operation of the generator 2 and the auxiliary drive motor 4, while the main drive motor controller 7 is specifically responsible for managing the working state of the main drive motor 5.

[0049] During the gear shifting process, the dual-control motor controller 6 can dynamically adjust the output power of the auxiliary drive motor 4 according to the current state and needs of the vehicle, and the dual main drive motor controller 7 can dynamically adjust the output power of the main drive motor 5 according to the current state and needs of the vehicle, and selectively connect with the shifting gear set in the gearbox 3 to ensure that sufficient power is provided to the wheels during the gear shifting.

[0050] In the present invention, the output shaft of the main drive motor 5 is loosely sleeved on the output shaft of the auxiliary drive motor 4, so that the main drive motor 5 and the auxiliary drive motor 4 can work independently or in coordination, and the main drive motor 5 and the auxiliary drive motor 4 are controlled by the dual-control motor controller 6 and the main drive motor controller 7, as well as the selective transmission connection between the main drive motor 5 and the auxiliary drive motor 4 and the shifting gear set, so that the power output can be maintained uninterrupted during the gear shifting. This arrangement improves the smoothness and safety of the vehicle's driving, especially in application scenarios that require continuous power (such as heavy-load climbing in mines).

[0051] The combined use of engine 1 and generator 2 allows the system to flexibly adjust the working state of engine 1 according to actual needs, thereby optimizing fuel consumption and reducing harmful emissions, and generator 2 can convert excess energy generated by engine 1 into electrical energy and store it in power battery 8, further improving energy utilization efficiency.

[0052] Furthermore, the main drive motor 5 and the auxiliary drive motor 4 can work independently or collaboratively according to driving conditions to provide strong and flexible power support. This design not only improves the overall power performance of the vehicle, but also enhances the ability to cope with complex road conditions.

[0053] In some embodiments, reference Figure 1 Or 2, the gearbox 3 also includes a coupler 9, and the coupler 9 is used to selectively couple the main drive motor 5 with the auxiliary drive motor 4. In the present invention, when the vehicle needs to shift gears and the currently used gear begins to disengage, the power paths of the main drive motor 5 and the auxiliary drive motor 4 are connected by the coupler 9, and the power paths of the main drive motor 5 and the auxiliary drive motor 4 output power to the wheels through the coupler 9 to ensure that the vehicle has continuous power.

[0054] The dual-control motor controller 6 and the main drive motor controller 7 are used to predict and adjust the working status of the main drive motor 5 and the auxiliary drive motor 4 before shifting, and adjust the output power of the auxiliary drive motor 4 and the main drive motor 5 according to the upcoming changes in power demand to ensure that the auxiliary drive motor 4 and the main drive motor 5 have sufficient power to supply the wheels during the gear shift to maintain the power continuity and speed smoothness of the vehicle.

[0055] In some embodiments, the gearbox 3 includes a first shifting gear set 31 and a second shifting gear set 32. When the coupler 9 couples the main drive motor 5 with the auxiliary drive motor 4, the output shafts of the main drive motor 5 and the auxiliary drive motor 4 are coupled to the first shifting gear set 31 or the second shifting gear set 32.

[0056] When the coupler 9 is uncoupled with the main drive motor 5 , the output shaft of the main drive motor 5 is undrive-connected with the first shift gear set 31 or the second shift gear set 32 ​​, that is, no driving force is provided.

[0057] In the present invention, when the coupler 9 couples the main drive motor 5 with the auxiliary drive motor 4, the output shafts of both are coupled to the first shift gear set 31 or the second shift gear set 32, ensuring that no matter which motor is working, power can be transmitted to the wheels. In the uncoupled state of the two, only the auxiliary drive motor 4 is used to provide driving force, and the main drive motor 5 is used as a backup power reserve. When the main drive motor controller 7 determines that the vehicle needs additional power, the main drive motor 5 is coupled to the auxiliary drive motor 4 by controlling the coupler 9 to provide additional power. This setting can flexibly allocate power sources to adapt to different driving conditions.

[0058] In some embodiments, the gearbox 3 includes a first shift shaft 33, a second shift shaft 34 arranged in parallel with the first shift shaft 33, and a shift device arranged on the first shift shaft 33. The first shift shaft 33 is transmission-connected to the first shift gear set 31 or the second shift gear set 32 ​​through the shift device, the output end of the first shift shaft 33 is transmission-connected to the main reducer, and the second shift shaft 34 is transmission-connected to the main drive motor 5.

[0059] The second shift gear set 32 ​​and the first shift gear set 31 are arranged in sequence from the input end to the output end of the first shift shaft 33, and are respectively coupled to the first shift shaft 33 and the second shift shaft 34. The shifting device is used for shifting the first shift gear set 31 and / or the second shift gear set 32.

[0060] In the present invention, by providing a first shift shaft 33 and a second shift shaft 34, and making them respectively connected to the auxiliary drive motor 4 and the main drive motor 5, one of the motors or both of them can be selectively used to provide power to the vehicle through the coupler 9 during the shifting process. This design ensures that continuous power output can be maintained even during the shifting process.

[0061] The present invention allows two motors to work independently or in coordination by means of the first shift shaft 33, the second shift shaft 34 and the coupler 9 arranged in parallel, so that the power source can be flexibly adjusted according to actual driving conditions, thereby improving the overall power transmission efficiency.

[0062] The second shift gear set 32 ​​and the first shift gear set 31 are sequentially arranged on the first shift shaft 33, so that the power requirements under different speed ranges can be met by different gear ratios, further optimizing the power transmission efficiency. Since the shifting without power interruption can be realized, the driver can get a smoother and more stable acceleration experience, especially in the case of frequent speed changes (such as urban traffic or mountain road driving), and the power distribution of the main drive motor 5 and the auxiliary drive motor 4 according to the dual-control motor controller 6 and the main drive motor controller 7, as well as the efficient shifting mechanism, enables the vehicle to perform well under various road conditions.

[0063] In some embodiments, referring to 1 or 2, the shifting device includes at least one first clutch 36 and / or at least one second clutch 37, the first clutch 36 is respectively arranged between the shifting gears in the corresponding groups of the first shift gear group 31 and the second shift gear group 32, and the second clutch 37 is arranged between the adjacent shifting gears of the first shift gear group 31 and the second shift gear group 32.

[0064] In some embodiments, the first shifting gear set 31 includes a first driving gear set disposed on the first shifting shaft 33 , and a first driven gear set loosely mounted on the second shifting shaft 34 and meshing with the first driving gear set.

[0065] The second shifting gear set 32 ​​includes a second driving gear set loosely mounted on the first shifting shaft 33 , and a second driven gear set fixed to the second shifting shaft 34 and meshing with the second driving gear set.

[0066] In some embodiments, a transmission gear 35 is disposed at the input end of the second shift shaft 34 , and the transmission gear 35 is used to mesh with the output gear of the main drive motor 5 so that the main drive motor 5 is transmission-connected to the second shift shaft 34 .

[0067] A specific example provided by the present invention includes:

[0068] like Figure 1 As shown, the new energy hybrid power system includes: 1. Engine; 2. ISG generator; 3. 6AMT power-free interruption gearbox; 4. Auxiliary drive motor TM1; 5. Main drive motor TM2; 6. Dual-control motor controller; 7. Main drive motor controller; 8. Power battery; 9. Coupler; 10. Torsional vibration damper; 11. Main clutch; 35. Transmission gear; 36. First clutch; 37. Second clutch; 311. Second-speed gear set; 312. Fourth-speed gear set; 313. Sixth-speed gear set; 321. First-speed gear set; 322. Third-speed gear set; 323. Five-speed gear set.

[0069] The first-speed gear set 321, the third-speed gear set 322, and the fifth-speed gear set 323 all include a main shift gear that is freely sleeved on the first shift shaft 33, and a slave shift gear that is arranged on the second shift shaft 34. The second-speed gear set 311, the fourth-speed gear set 312, and the sixth-speed gear set 313 all include a main shift gear that is freely sleeved on the first shift shaft, and a slave shift gear that is freely sleeved on the second shift shaft 34.

[0070] The engine 1 is connected to the torsional vibration damper 10, and the torsional vibration damper 10 is connected to the ISG generator 2. The ISG generator 2 is connected to the auxiliary drive motor 4 through the main clutch 11. The main drive motor 5 is directly connected to the five-speed gear set 323, the three-speed gear set 322, and the first-speed gear set 321 through the transmission gear 35. The auxiliary drive motor 4 is directly connected to the six-speed gear set 313, the four-speed gear set 312, and the two-speed gear set 311. The main drive motor 5 and the auxiliary drive motor 4 are connected in a shaft sleeve shaft manner. The dual-control motor controller 6 is respectively connected to the ISG generator 2 and the auxiliary drive motor 4 through the U, V, and W three-phase lines. The main drive motor controller 7 is connected to the main drive motor 5 through the U, V, and W three-phase lines. The power battery 8 is respectively connected to the dual-control motor controller 6 and the main drive motor controller 7 through the positive and negative pole lines.

[0071] Shifting process of the 6AMT power-free interruption gearbox 3: When the first clutch 36 in the second shift gear set 32 ​​is in the middle position between the first-speed gear set 321 and the third-speed gear set 322, it indicates neutral gear; when the first clutch 36 is in the right position and combined with the first-speed gear set 321, it indicates first gear is engaged; when it is in the left position and combined with the third-speed gear set 322, it indicates third gear is engaged. When the second clutch 37 between the first shift gear set 31 and the second shift gear set 32 ​​is in the middle position, it indicates neutral gear; when the second clutch 37 is in the right position and combined with the fifth-speed gear set 323, it indicates fifth gear is engaged; when it is in the left position and combined with the second-speed gear set 311, it indicates second gear is engaged. When the first clutch 36 in the first shift gear set 31 is in the middle position, it indicates neutral gear; when the first clutch 36 is in the right position and combined with the fourth-speed gear set 312, it indicates fourth gear is engaged; when it is in the left position and combined with the sixth-speed gear set 313, it indicates sixth gear is engaged.

[0072] The coupler 9 is in the Figure 1 When the coupler 9 is in the left position and coupled with the main drive motor, it indicates that the power of the main drive motor 5 and the auxiliary drive motor 4 are connected together.

[0073] The process of shifting gears without power interruption is described by taking the shifting from first gear to second gear as an example: the first clutch 36 in the second shift gear set 32 ​​is engaged in the first gear speed gear set 321, at which time the coupler 9 can be separated or engaged (it can be understood that separation or engagement refers to the coupled connection or uncoupled connection between the coupler 9 and the output shaft of the main drive motor 5). If the coupler 9 is in the engaged state, then when the first gear speed gear set 321 is shifted to the second gear speed gear set 311, the coupler 9 is first separated from the output shaft of the main drive motor 5, and then the first clutch 36 in the first shift gear set 31 is engaged in the second gear speed gear set 311, and then the first clutch 36 in the second shift gear set 32 ​​is downshifted from the first gear speed gear set 321. The vehicle energy management determines whether the coupler 9 is engaged again according to the total required power. The process of shifting from first gear to second gear is described with no power interruption. It can be understood that the vehicle energy management system controls whether the coupler 9 is engaged again according to the total required power, including: when the power provided by the auxiliary drive motor 4 meets the total required power, there is no need to engage the coupler 9; when the power provided by the auxiliary drive motor 4 is lower than the total required power, the coupler 9 is controlled to couple the main drive motor 5 and the auxiliary drive motor 4, and the main drive motor controller 7 drives the main drive motor 5 according to the power difference to output driving force.

[0074] Similarly, the shifting process from second gear to third gear, third gear to fourth gear, fourth gear to fifth gear, and fifth gear to sixth gear is similar to the process from first gear to second gear.

[0075] The series-parallel mode switching process includes: when the vehicle speed is lower than a certain value (generally lower than 5km / h-10km / h), the main clutch 11 is disengaged, and the vehicle is driven by the main drive motor 5 and the auxiliary drive motor 4. When the vehicle speed is greater than a certain value (generally greater than 7km / h-12km / h), the ISG generator 2 quickly adjusts the speed of the engine 1 to within the speed range of the auxiliary drive motor 4 (generally the speed difference is less than 50rpm), and then the main clutch 11 is engaged, and the vehicle is directly driven by the engine 1. The vehicle energy management determines whether the main drive motor 5 and the auxiliary drive motor 4 assist or generate electricity according to the total required power.

[0076] Another specific example provided by the present invention comprises:

[0077] like Figure 2 As shown, the new energy hybrid power system includes: 1. Engine; 2. ISG generator; 3. 4AMT power-free interruption gearbox; 4. Auxiliary drive motor TM1; 5. Main drive motor TM2; 6. Dual-control motor controller; 7. Main drive motor controller; 8. Power battery; 9. Coupler; 10. Torsional vibration damper; 11. Main clutch; 35. Transmission gear; 36. First clutch; 37. Second clutch; 311. Second-speed gear set; 312. Fourth-speed gear set; 321. First-speed gear set; 322. Third-speed gear set.

[0078] The engine 1 is connected to the torsional vibration damper 10, the torsional vibration damper 10 is connected to the ISG generator 2, the ISG generator 2 is connected to the auxiliary drive motor 4 through the main clutch 11, the main drive motor 5 is directly connected to the third-speed gear set 322 and the first-speed gear set 321 through the transmission gear 35, the auxiliary drive motor 4 is directly connected to the fourth-speed gear set 312 and the second-speed gear set 311, the main drive motor 5 and the auxiliary drive motor 4 are connected in a shaft-sleeve-shaft manner, the dual-control motor controller 6 is respectively connected to the ISG generator 2 and the auxiliary drive motor 4 through the U, V, and W three-phase lines, the main drive motor controller 7 is connected to the main drive motor 5 through the U, V, and W three-phase lines, and the power battery 8 is respectively connected to the dual-control motor controller 6 and the main drive motor controller 7 through the positive and negative pole lines.

[0079] The shifting process of the 4AMT power-free interruption gearbox 3 includes: when the first clutch 36 in the second shift gear set 32 ​​is in the middle position, it indicates neutral gear; when the first clutch 36 is in the right position and combined with the first gear speed gear set 321, it indicates first gear is engaged; when it is in the left position and combined with the third gear speed gear set 322, it indicates third gear is engaged. When the first clutch 36 in the first shift gear set is in the middle position, it indicates neutral gear; when the first clutch 36 is in the right position and combined with the second gear speed gear set 311, it indicates second gear is engaged; when it is in the left position and combined with the fourth gear speed gear set 312, it indicates fourth gear is engaged.

[0080] The coupler 9 is in the Figure 2 When the coupler 9 is in the left position, it indicates that the power of the main drive motor 5 and the auxiliary drive motor 4 are not connected. When the coupler 9 is in the left position, it indicates that the power of the main drive motor 5 and the auxiliary drive motor 4 are coupled together.

[0081] The process of shifting gears without power interruption is described by taking the shifting from first gear to second gear as an example: the first clutch 36 in the second shift gear set is engaged in the first gear speed gear set 321. At this time, the coupler 9 can be separated or engaged. If the coupler 9 is in the engaged state, when shifting from first gear to second gear, the coupler 9 is first separated from the output shaft of the main drive motor 5, and then the first clutch 36 in the first shift gear set 31 is engaged in the second gear speed gear set 311. Then, the first clutch in the second shift gear set 32 ​​is shifted back from the first gear speed gear set 321. The vehicle energy management determines whether the coupler 9 is engaged again according to the total required power. The process of shifting from first gear to second gear is described with no power interruption. It can be understood that the vehicle energy management system controls whether the coupler 9 is engaged again according to the total required power, including: when the power provided by the auxiliary drive motor 4 meets the total required power, there is no need to engage the coupler 9; when the power provided by the auxiliary drive motor 4 is lower than the total required power, the coupler 9 is controlled to couple the main drive motor 5 and the auxiliary drive motor 4, and the main drive motor controller 7 drives the main drive motor 5 according to the power difference to output driving force.

[0082] Similarly, the gear shifting process from second gear to third gear and from third gear to fourth gear is similar to the gear shifting process from first gear to second gear.

[0083] Series-parallel mode switching process. When the vehicle speed is lower than a certain value (generally lower than 5km / h-10km / h), the main clutch 11 is disengaged, and the vehicle is driven by the main drive motor 5 and the auxiliary drive motor 4. When the vehicle speed is greater than a certain value (generally greater than 7km / h-12km / h), the ISG generator 2 quickly adjusts the speed of the engine 1 to within the speed range of the auxiliary drive motor 4 (generally the speed difference is less than 50rpm), and then the main clutch 11 is engaged, and the vehicle is directly driven by the engine 1. The vehicle energy management determines whether the main drive motor 5 and the auxiliary drive motor 4 provide assistance or generate electricity based on the total required power.

[0084] A second aspect of an embodiment of the present disclosure provides a vehicle comprising any one of the above-mentioned new energy hybrid power systems.

[0085] refer to Figure 3 According to a third aspect of the embodiments of the present disclosure, a new energy hybrid power control method is provided. The control method is implemented according to the above-mentioned new energy hybrid power system. The method includes:

[0086] Step S101 , collecting the real-time speed of the vehicle while it is traveling, wherein the vehicle includes a new energy hybrid power system, and the new energy hybrid power system includes a main drive motor 5 , an auxiliary drive motor 4 , an engine 1 and a generator 2 .

[0087] Step S102: If the real-time vehicle speed is lower than the first threshold, the main clutch 11 of the vehicle is controlled to be disengaged, so that the main drive motor 5 and the auxiliary drive motor 4 drive the vehicle.

[0088] Step S103: If the real-time vehicle speed is greater than the second threshold, the generator 2 is controlled to adjust the speed of the engine 1 to within the speed range of the auxiliary drive motor 4, and the main clutch 11 is controlled to engage, so that the engine 1 directly drives the vehicle.

[0089] In some embodiments, after controlling the main clutch to engage in step S103, the method further includes:

[0090] Get the total required power of the vehicle.

[0091] If the output power of the engine 1 is less than or equal to the total required power, the main drive motor 5 and the auxiliary drive motor 4 are controlled to jointly drive the vehicle.

[0092] If the output power of the engine 1 is greater than the total required power, the generator 2 is controlled to charge the power battery of the vehicle.

[0093] In some embodiments, the new energy hybrid power system further includes a gearbox 3, a coupler 9 and a shifting device, the gearbox 3 includes a first shifting gear set 31 and a second shifting gear set 32, and the method further includes:

[0094] A gear shift request is received, and the coupler 9 is controlled so that the main drive motor 5 and the auxiliary drive motor 4 are in a non-coupled connection state.

[0095] Based on the target gear to be engaged, the shifting device is controlled to engage the first shifting gear set 31 and / or the second shifting gear set 32 ​​with the shifting gear corresponding to the target gear.

[0096] In which, based on the completion of the engagement of the target gear to be engaged, the shift device disengages the shift gear corresponding to the current gear.

[0097] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A new energy hybrid power system, characterized in that: include: engine; A generator, the generator is drivingly connected to an output shaft of the engine; A gearbox, wherein the input end of the gearbox is drivingly connected to the output shaft of the engine, and the output end of the gearbox is used for drivingly connecting to the main reducer; A main drive motor and an auxiliary drive motor, wherein the output shaft of the main drive motor is loosely sleeved on the output shaft of the auxiliary drive motor, the output shaft of the auxiliary drive motor is coupled and transmission-connected with the output shaft of the generator through a main clutch, and the output shafts of the main drive motor and the auxiliary drive motor are selectively transmission-connected with a shift gear set in the gearbox; A dual-control motor controller, a main drive motor controller and a power battery, wherein the first end of the dual-control motor controller and the first end of the main drive motor controller are both electrically connected to the power battery, the second end of the dual-control motor controller is electrically connected to the generator and the auxiliary drive motor respectively, and the second end of the main drive motor controller is electrically connected to the main drive motor.

2. The new energy hybrid power system according to claim 1 is characterized in that: The gearbox further includes a coupler, and the coupler is used to selectively couple the main drive motor with the auxiliary drive motor.

3. The new energy hybrid power system according to claim 2 is characterized in that: The gearbox includes a first shift gear set and a second shift gear set; When the coupler couples the main drive motor with the auxiliary drive motor, the output shafts of the main drive motor and the auxiliary drive motor are coupled with the first shift gear set or the second shift gear set.

4. The new energy hybrid power system according to claim 3 is characterized in that: The gearbox comprises a first shift shaft, a second shift shaft arranged in parallel with the first shift shaft, and a shift device arranged on the first shift shaft; The first shift shaft is connected to the first shift gear set or the second shift gear set through the shift device, the output end of the first shift shaft is connected to the main reducer; the second shift shaft is connected to the main drive motor; In a direction from the input end of the first shift shaft to the output end, the second shift gear set and the first shift gear set are arranged in sequence and are coupled to the first shift shaft and the second shift shaft respectively; The shifting device is used for shifting the first shifting gear set and / or the second shifting gear set.

5. The new energy hybrid power system according to claim 4 is characterized in that: The shifting device comprises: at least one first clutch and / or at least one second clutch; The first clutch is respectively arranged between the corresponding shift gears in the first shift gear set and the second shift gear set; The second clutch is disposed between adjacent shift gears of the first shift gear set and the second shift gear set.

6. The new energy hybrid power system according to claim 4, characterized in that: The first shift gear set includes a first driving gear set disposed on the first shift shaft, and a first driven gear set loosely sleeved on the second shift shaft and meshing with the first driving gear set; The second shift gear set includes a second driving gear set loosely mounted on the first shift shaft, and a second driven gear set fixed to the second shift shaft and meshing with the second driving gear set.

7. The new energy hybrid power system according to claim 4, characterized in that: The input end of the second shift shaft is provided with a transmission gear, and the transmission gear is used to mesh with the output gear of the main drive motor so that the main drive motor is connected to the second shift shaft in a transmission manner.

8. A vehicle, characterized in that: It comprises the new energy hybrid power system as described in any one of claims 1 to 7.

9. A new energy hybrid power control method, characterized in that: The method comprises: Collecting the real-time speed of a vehicle while it is traveling, wherein the vehicle includes a new energy hybrid power system, and the new energy hybrid power system includes a main drive motor, an auxiliary drive motor, an engine, and a generator; If the real-time vehicle speed is lower than a first threshold, controlling the main clutch of the vehicle to be disengaged so that the main drive motor and the auxiliary drive motor drive the vehicle; If the real-time vehicle speed is greater than a second threshold, the generator is controlled to adjust the speed of the engine to within the speed range of the auxiliary drive motor, and the main clutch is controlled to engage so that the engine directly drives the vehicle.

10. The new energy hybrid power control method according to claim 9, characterized in that: After controlling the main clutch to engage, the method further includes: Obtain the total required power of the vehicle; If the output power of the engine is less than or equal to the total required power, controlling the main drive motor and the auxiliary drive motor to jointly drive the vehicle; If the output power of the engine is greater than the total required power, the generator is controlled to charge the power battery of the vehicle.

11. The new energy hybrid power control method according to claim 9, characterized in that: The new energy hybrid power system further includes a gearbox, a coupler and a shifting device, the gearbox includes a first shifting gear set and a second shifting gear set, and the method further includes: receiving a gear shift request, and controlling the coupler so that the main drive motor and the auxiliary drive motor are in a non-coupled connection state; Based on the target gear to be engaged, controlling the shift device to engage the first shift gear set and / or the second shift gear set with the shift gear corresponding to the target gear; Wherein, based on the completion of the engagement of the target gear to be engaged, the shift device disengages the shift gear corresponding to the current gear.

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