Extended-range hybrid power control method and system and engineering machinery

Abstract

The invention relates to the technical field of engineering machinery, and discloses an extended-range hybrid power control method and system and engineering machinery, the operation state of the engineering machinery comprises getting-off operation and getting-on operation, and the energy supply mode of the engineering machinery comprises a pure electric mode and an extended-range mode. And getting-off operation can be performed in a pure electric mode, getting-on operation can be performed in the pure electric mode, getting-off operation can be performed in a range extending mode, and getting-on operation can be performed in the range extending mode. According to the invention, the get-off operation and the get-on operation of the engineering machinery both have a pure electric mode and a range extending mode, the requirements of long-time get-off driving and get-on operation can be met, the problem of endurance anxiety of a user to the engineering machinery is solved, the environment adaptability is high, and the application range is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a range-extended hybrid power control method, system and engineering machinery. Background Art

[0002] The power source of traditional construction machinery is the engine. Long-term operation of the engine will produce high pollution emissions and noise, which will have a negative impact on the environment and the physical and mental health of the driver. In addition, when traditional construction machinery is operated on board, the required energy is usually supplied by the engine-driven hydraulic oil pump. However, due to the large power of the engine, the engine is often unable to operate in its high-efficiency area, resulting in energy waste. With the advancement of the new energy strategy, construction machinery is also moving towards electrification. However, pure electric models are limited by battery capacity and will face the problem of insufficient battery power, affecting operating efficiency; plug-in models require the working environment to provide a stable power supply and have high requirements for the working environment. Summary of the invention

[0003] In view of this, the present invention provides a range-extended hybrid power control method, system and engineering machinery to solve the problems of low operating efficiency and high requirements on the operating environment of existing engineering machinery.

[0004] In a first aspect, the present invention provides a range-extended hybrid control method, wherein the operation state of the engineering machinery includes getting off the vehicle and getting on the vehicle, and the energy supply mode of the engineering machinery includes a pure electric mode and an extended-range mode, wherein when the pure electric mode is used for getting off the vehicle, the integrated electric drive axle is powered by an energy storage unit;

[0005] When the vehicle is operated in pure electric mode, the integrated electric drive axle is powered by the energy storage unit, and the integrated electric drive axle drives the hydraulic components of the vehicle through the power take-off structure;

[0006] When the extended-range mode is used for getting off the vehicle, the integrated electric drive axle is powered by the energy storage unit and the extended-range structure at the same time, or the integrated electric drive axle is powered by the extended-range structure and the energy storage unit is charged at the same time;

[0007] When the extended-range mode is used for on-board operations, the integrated electric drive axle is powered by the extended-range structure and the energy storage unit is charged at the same time. The integrated electric drive axle drives the hydraulic components of the on-board vehicle through the power take-off structure.

[0008] Beneficial effects: The integrated electric drive axle with added power take-off structure provides a power source for the hydraulic components on the vehicle. Compared with the traditional gearbox power take-off or oil pump motor operation, it can reduce space occupation, improve powertrain efficiency, and save costs. In addition, the control method of the present invention is applied to enable the engineering machinery to have pure electric mode and extended range mode for both the disembarkation and boarding operations, which can meet the needs of long-term disembarkation and boarding operations, solve the user's anxiety about the endurance of engineering machinery, and has strong environmental adaptability and a wide range of applications.

[0009] In an optional implementation, when the power level of the energy storage unit is not lower than the pure electric mode threshold and the power take-off structure is not working, the construction machinery automatically adopts the pure electric mode for disembarking operation;

[0010] When the power level of the energy storage unit is not lower than the pure electric mode threshold and the power take-off structure is working, the construction machinery automatically adopts the pure electric mode for on-board operations.

[0011] In an optional implementation, when the power level of the energy storage unit is lower than the pure electric mode threshold and not lower than the first threshold, and the power take-off structure is not working, the engineering machinery automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure adopts the first power generation, and the energy storage unit and the extended-range structure simultaneously supply power to the integrated electric drive axle;

[0012] When the power level of the energy storage unit is lower than the first threshold and the power take-off structure is not working, the construction machinery automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure uses the second power generation. Part of the electric energy generated by the extended-range structure is used to charge the energy storage unit, and the other part is used to power the integrated electric drive axle.

[0013] The first power is smaller than the second power.

[0014] Beneficial effect: The range-extended structure does not participate in the direct driving of the vehicle, but only provides electrical energy to the energy storage unit and the integrated electric drive axle, so that the range-extended structure can always work in the economic range and improve energy consumption utilization.

[0015] In an optional embodiment, when the range-extended structure adopts the second power to generate electricity and charge the energy storage unit, when the power of the energy storage unit reaches a second threshold, the range-extended structure stops generating electricity, and the construction machinery automatically switches to a pure electric mode for disembarking operations.

[0016] Beneficial effects: The mode of getting off the vehicle is automatically switched according to the power of the energy storage unit, which improves the automation level of construction machinery and is more energy-saving and environmentally friendly.

[0017] In an optional embodiment, when the power of the energy storage unit is lower than the pure electric mode threshold and the power take-off structure is working, the construction machinery automatically adopts the extended-range mode to perform on-board operations. At this time, the extended-range structure adopts the third power generation. Part of the electric energy generated by the extended-range structure is used to charge the energy storage unit, and the other part is used to power the integrated electric drive axle. The integrated electric drive axle drives the hydraulic components of the vehicle through the power take-off structure.

[0018] Beneficial effect: The range-extended structure does not participate in the direct driving of the vehicle, but only provides electrical energy to the energy storage unit and the integrated electric drive axle, which enables the range-extended structure to always operate in the economic range and improve energy consumption utilization.

[0019] In an optional embodiment, when the range-extended structure adopts the third power to generate electricity and charge the energy storage unit, when the power of the energy storage unit reaches a third threshold, the range-extended structure stops generating electricity, and the construction machinery automatically switches to a pure electric mode for on-board operations.

[0020] Beneficial effects: The mode of on-board operation is automatically switched according to the power of the energy storage unit, which improves the automation level of construction machinery and is more energy-saving and environmentally friendly.

[0021] In an optional embodiment, when the vehicle boarding operation is performed in pure electric mode, the electric winch structure of the vehicle boarding is driven to operate by the energy storage unit;

[0022] When the vehicle loading operation is performed in the extended range mode, the electric winch structure of the vehicle loading is driven to operate by the extended range structure; and / or,

[0023] The energy supply mode of the construction machinery also includes a plug-in mode. When the plug-in mode is used for on-board operation, the on-board charger is connected to an external power source, and the on-board charger is used to charge the energy storage unit, and the energy storage unit supplies power to the integrated electric drive axle, and the integrated electric drive axle drives the hydraulic components of the on-board vehicle to operate through the power take-off structure; and / or,

[0024] The functional modes of the construction machinery also include a forced power generation mode. When the construction machinery is in a neutral state and the power of the energy storage unit is lower than the threshold of the forced power generation mode, the energy storage unit is charged through the extended-range structure. When the power of the energy storage unit reaches a fourth threshold, the extended-range structure stops generating power.

[0025] Beneficial effects: Compared with the traditional hydraulically driven winch, the electric winch structure can greatly improve the response speed and operational stability. At the same time, it can recover energy during the telescopic operation to charge the energy storage unit, improve energy utilization, improve the economic efficiency of the operation, and achieve further energy saving in the operation.

[0026] In a second aspect, the present invention further provides an extended-range hybrid power system, which applies the above-mentioned extended-range hybrid power control method, including: an energy storage unit; an extended-range structure, electrically connected to the energy storage unit; an integrated electric drive axle, electrically connected to both the energy storage unit and the extended-range structure; a power take-off structure, transmission connection to the integrated electric drive axle, and the power take-off structure is transmission connection to the on-board hydraulic assembly.

[0027] In an optional embodiment, the range-extending structure comprises an engine and a generator, and the engine is suitable for driving the generator to generate electricity; and / or the range-extending structure is arranged at the lower part of the engineering machinery.

[0028] In a third aspect, the present invention further provides a construction machinery comprising the above-mentioned extended-range hybrid power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A schematic diagram of the connection structure of a range-extended hybrid power system according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the extended-range hybrid power system of an embodiment of the present invention when performing a vehicle exit operation in a pure electric mode (the shaded portion represents a working component);

[0032] Figure 3 This is a schematic diagram of the extended-range hybrid power system of an embodiment of the present invention when performing vehicle-mounting operations in a pure electric mode (the shaded portion represents a working component);

[0033] Figure 4 It is a schematic diagram of the extended-range hybrid power system of an embodiment of the present invention when performing an exit operation in the extended-range mode (the shaded part represents the working parts);

[0034] Figure 5 It is a schematic diagram of the extended-range hybrid power system of an embodiment of the present invention when performing a vehicle-mounting operation in the extended-range mode (the shaded part represents the working parts);

[0035] Figure 6 Schematic diagram of a range-extended hybrid power system in a forced power generation mode according to an embodiment of the present invention (the shaded portion represents a working component);

[0036] Figure 7This is a schematic diagram of the extended-range hybrid power system of an embodiment of the present invention when using the plug-in mode to perform on-board operations (the shaded parts represent working parts).

[0037] Description of reference numerals:

[0038] 1. Energy storage unit; 2. Integrated electric drive axle; 3. Power take-off structure; 4. Hydraulic assembly; 41. Hydraulic oil pump; 5. Range extension structure; 51. Engine; 52. Generator; 6. Electric winch structure; 61. Winch motor; 62. Winch mechanism; 7. On-board charger; 8. All-in-one controller. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0040] Combine the following Figures 1 to 7 , describing an embodiment of the present invention.

[0041] According to an embodiment of the present invention, on the one hand, a range-extended hybrid control method is provided, the operation state of the engineering machinery includes getting off the vehicle and getting on the vehicle, and the energy supply mode of the engineering machinery includes a pure electric mode and an extended-range mode, wherein:

[0042] When the vehicle is disembarked in pure electric mode, the integrated electric drive axle 2 is powered by the energy storage unit 1;

[0043] When the vehicle-mounting operation is performed in pure electric mode, the integrated electric drive axle 2 is powered by the energy storage unit 1, and the integrated electric drive axle 2 drives the hydraulic component 4 of the vehicle-mounting operation through the power take-off structure 3;

[0044] When the extended-range mode is used for getting off the vehicle, the integrated electric drive bridge 2 is powered by the energy storage unit 1 and the extended-range structure 5 at the same time, or the integrated electric drive bridge 2 is powered by the extended-range structure 5 and the energy storage unit 1 is charged at the same time;

[0045] When the extended-range mode is used for the vehicle boarding operation, the integrated electric drive axle 2 is powered by the extended-range structure 5 and the energy storage unit 1 is charged at the same time. The integrated electric drive axle 2 drives the hydraulic component 4 of the vehicle to operate through the power take-off structure 3.

[0046] The extended-range hybrid control method of this embodiment is applied, and the integrated electric drive axle 2 with the added power take-off structure 3 is used to provide a power source for the onboard hydraulic assembly 4. Compared with the traditional gearbox power take-off or oil pump motor operation, it can reduce space occupation, improve powertrain efficiency, and save costs. In addition, the control method of this embodiment is applied, so that the engineering machinery's disembarkation operation and onboard operation both have pure electric mode and extended-range mode, which can meet the needs of long-term disembarkation and onboard operation, solve the user's anxiety about the endurance of engineering machinery, and has strong environmental adaptability and a wide range of applications.

[0047] In one embodiment, Figure 2 As shown, when the power of the energy storage unit 1 is not less than the pure electric mode threshold and the power take-off structure 3 is not working, the construction machinery automatically adopts the pure electric mode for disembarkation. At this time, the energy storage unit 1 has sufficient power, and the integrated electric drive axle 2 can be powered only by the energy storage unit 1 to enable the construction machinery to travel; the range extension structure 5 is in a shutdown state.

[0048] In one embodiment, Figure 3 As shown, when the power level of the energy storage unit 1 is not lower than the pure electric mode threshold and the power take-off structure 3 is working, the construction machinery automatically adopts the pure electric mode to perform the on-board operation.

[0049] In one embodiment, Figure 3 As shown, when the pure electric mode is adopted for the vehicle boarding operation, the electric winch structure 6 of the vehicle boarding is driven to operate by the energy storage unit 1 .

[0050] It is worth noting that when the pure electric mode is used for the on-board operation, the energy storage unit 1 has sufficient power, and the integrated electric drive axle 2 and the electric winch structure 6 can be powered only by the energy storage unit 1, and the hydraulic component 4 can be driven through the power take-off structure 3 to make the on-board hydraulic component 4 work, thereby realizing the on-board operations such as winching, rotation, amplitude change, telescopic and outrigger operations; at this time, the range-extending structure 5 is in a shutdown state.

[0051] It should be noted that compared with the traditional hydraulically driven winch, the electric winch structure 6 can greatly improve the response speed and operational stability. At the same time, it can recover energy during the telescopic operation to charge the energy storage unit 1, thereby improving energy utilization, improving the economic efficiency of the operation, and achieving further energy saving in the operation.

[0052] In one embodiment, Figure 4 As shown, when the power of the energy storage unit 1 is lower than the pure electric mode threshold and not lower than the first threshold, and the power take-off structure 3 is not working, the engineering machinery automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure 5 adopts the first power generation, and the energy storage unit 1 and the extended-range structure 5 simultaneously supply power to the integrated electric drive bridge 2;

[0053] When the power of the energy storage unit 1 is lower than the first threshold and the power take-off structure 3 is not working, the engineering machine automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure 5 uses the second power generation. Part of the electric energy generated by the extended-range structure 5 is used to charge the energy storage unit 1, and the other part is used to power the integrated electric drive bridge 2.

[0054] The first power is smaller than the second power.

[0055] It is worth noting that the range-extending structure 5 does not participate in the direct driving of the vehicle, but only provides electric energy to the energy storage unit 1 and the integrated electric drive bridge 2, so that the range-extending structure 5 can always work in the economic range and improve the energy consumption utilization rate.

[0056] It should be noted that when the power of the energy storage unit 1 is lower than the pure electric mode threshold, but the power is still relatively sufficient, the range-extended structure 5 performs low-power power generation, and part of the power of the integrated electric drive bridge 2 comes from the range-extended structure 5, and the other part comes from the energy storage unit 1, thereby realizing extended-range driving of the construction machinery; when the power of the energy storage unit 1 is not sufficient, the range-extended structure 5 performs high-power power generation, and part of the generated electricity is used to charge the energy storage unit 1, and the other part of the electricity is used to drive the integrated electric drive bridge 2.

[0057] Furthermore, when the range-extending structure 5 uses the second power to generate electricity and charges the energy storage unit 1, when the power of the energy storage unit 1 reaches the second threshold, the range-extending structure 5 stops generating electricity, and the engineering machine automatically switches to the pure electric mode for disembarking operation. In this way, the mode of disembarking operation is automatically switched according to the power of the energy storage unit 1, thereby improving the automation degree of the engineering machine and being more energy-saving and environmentally friendly.

[0058] It is worth noting that the second threshold is greater than the first threshold.

[0059] In one embodiment, Figure 5 As shown, when the power of the energy storage unit 1 is lower than the pure electric mode threshold and the power take-off structure 3 is working, the construction machinery automatically adopts the extended-range mode to perform on-board operations. At this time, the extended-range structure 5 uses the third power generation. Part of the electric energy generated by the extended-range structure 5 is used to charge the energy storage unit 1, and the other part is used to power the integrated electric drive bridge 2. The integrated electric drive bridge 2 drives the hydraulic component 4 on the vehicle to operate through the power take-off structure 3.

[0060] In one embodiment, Figure 5 As shown, when the extended-range mode is adopted for the vehicle boarding operation, the electric winch structure 6 of the vehicle boarding is driven to operate by the extended-range structure 5 .

[0061] It is worth noting that the range-extending structure 5 does not participate in the direct driving of the vehicle, but only provides electrical energy to the energy storage unit 1, the integrated electric drive axle 2 and the electric winch structure 6, so that the range-extending structure 5 can always work in the economic range and improve energy consumption utilization.

[0062] It should be noted that the third power is greater than the first power. That is, when the extended-range mode is used for boarding, the extended-range structure 5 generates high-power electricity, part of which is used to charge the energy storage unit 1, and the other part is used to provide power for the integrated electric drive axle 2 and the electric winch structure 6, and the hydraulic component 4 is driven through the power take-off structure 3 to achieve the extended-range boarding operation.

[0063] In one embodiment, Figures 1 to 7 As shown, the range-extending structure 5 includes a coupled engine 51 and a generator 52. Different power generation powers can be selected by switching between different modes. The engine 51 does not provide driving force to the entire vehicle, but only drives the generator 52 to generate electricity. With this arrangement, the engine 51 can always work in the economic range, improve fuel utilization, and achieve fuel-saving effects.

[0064] Furthermore, when the range-extending structure 5 uses the third power to generate electricity and charges the energy storage unit 1, when the power of the energy storage unit 1 reaches the third threshold, the range-extending structure 5 stops generating electricity, and the engineering machine automatically switches to the pure electric mode for the onboard operation. In this way, the onboard operation mode is automatically switched according to the power of the energy storage unit 1, which improves the automation of the engineering machine and is more energy-saving and environmentally friendly.

[0065] In one embodiment, Figure 6 As shown, the functional mode of the construction machinery also includes a forced power generation mode. When the construction machinery is in a neutral state and the power of the energy storage unit 1 is lower than the threshold of the forced power generation mode, the energy storage unit 1 is charged through the range-extending structure 5. When the power of the energy storage unit 1 reaches a fourth threshold, the range-extending structure 5 stops generating power.

[0066] It is worth noting that, in the forced power generation mode, the range-extending structure 5 can use high power for power generation.

[0067] In one embodiment, Figure 7 As shown, the energy supply mode of the construction machinery also includes a plug-in mode. When the plug-in mode is used for on-board operations, the on-board charger 7 is connected to an external power source, and the energy storage unit 1 is charged by the on-board charger 7. The energy storage unit 1 supplies power to the integrated electric drive axle 2, and the integrated electric drive axle 2 drives the hydraulic component 4 of the on-board vehicle to operate through the power take-off structure 3.

[0068] It is worth noting that when the AC charging gun is connected to the vehicle and is in the AC charging state, and there is a request for boarding operation on the vehicle, the construction machinery automatically adopts the plug-in mode for boarding operation. At this time, the extended-range structure 5 is in a shutdown state, and the energy storage unit 1 is charged by the on-board charger 7 (OBC). At the same time, the energy storage unit 1 provides power to the integrated electric drive axle 2 and the electric winch structure 6, and drives the hydraulic component 4 through the power take-off structure 3 to realize the plug-in operation condition.

[0069] According to an embodiment of the present invention, on the other hand, a range-extended hybrid power system is provided, and the range-extended hybrid power control method is applied, such as Figure 1 As shown, it includes: an energy storage unit 1, a range-extending structure 5, an integrated electric drive bridge 2 and a power take-off structure 3. The range-extending structure 5 is electrically connected to the energy storage unit 1, the integrated electric drive bridge 2 is electrically connected to both the energy storage unit 1 and the range-extending structure 5, the power take-off structure 3 is transmission-connected to the integrated electric drive bridge 2, and the power take-off structure 3 is transmission-connected to the onboard hydraulic assembly 4.

[0070] In one embodiment, Figure 1 As shown, the hydraulic assembly 4 includes a hydraulic oil pump 41, a slewing hydraulic circuit, a luffing hydraulic circuit, a telescopic hydraulic circuit, an outrigger and an auxiliary hydraulic circuit. The power take-off structure 3 is suitable for driving the hydraulic oil pump 41 to work, and the hydraulic oil pump 41 provides hydraulic oil to each hydraulic circuit.

[0071] In one embodiment, Figure 1 As shown, the upper vehicle is also provided with an electric hoisting structure 6, and the energy storage unit 1 and the range-extending structure 5 are electrically connected to the electric hoisting structure 6. Specifically, the electric hoisting structure 6 includes a hoisting motor 61 and a hoisting mechanism 62. The energy storage unit 1 and the range-extending structure 5 are suitable for providing electric energy to the hoisting motor 61, and the hoisting motor 61 is suitable for driving the hoisting mechanism 62 to operate. Such a configuration enables the hoisting motor 61 to recover energy and charge the energy storage unit 1.

[0072] In one embodiment, Figure 1 As shown, the range-extending structure 5 includes an engine 51 and a generator 52 , and the engine 51 is suitable for driving the generator 52 to generate electricity.

[0073] In one embodiment, Figure 1 As shown, the range-extending structure 5 is arranged at the lower part of the engineering machinery.

[0074] In one embodiment, Figure 1 As shown, the extended-range hybrid system further includes an on-board charger 7, which is electrically connected to the energy storage unit 1. The on-board charger 7 is suitable for connecting to an external power source and charging the energy storage unit 1.

[0075] In one embodiment, Figure 1 As shown, the extended-range hybrid power system further includes an all-in-one controller 8 , which is electrically connected to the energy storage unit 1 , the generator 52 , the integrated electric drive axle 2 and the winch motor 61 .

[0076] In one embodiment, the energy storage unit 1 is a power battery, and the power take-off structure 3 is a power take-off.

[0077] According to an embodiment of the present invention, in yet another aspect, there is provided a construction machine comprising the above-mentioned extended-range hybrid power system.

[0078] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A range-extended hybrid power control method, characterized in that: The operation status of construction machinery includes getting off the vehicle and getting on the vehicle. The energy supply mode of construction machinery includes pure electric mode and extended range mode. When the vehicle is disembarked in a pure electric mode, the integrated electric drive bridge (2) is powered by the energy storage unit (1); When the vehicle-mounting operation is performed in a pure electric mode, the integrated electric drive bridge (2) is powered by the energy storage unit (1), and the integrated electric drive bridge (2) drives the hydraulic component (4) of the vehicle-mounting operation through the power take-off structure (3); When the extended-range mode is used for the disembarkation operation, the integrated electric drive bridge (2) is powered by the energy storage unit (1) and the extended-range structure (5) at the same time, or the integrated electric drive bridge (2) is powered by the extended-range structure (5) and the energy storage unit (1) is charged at the same time; When the extended-range mode is used for the on-board operation, the integrated electric drive bridge (2) is powered by the extended-range structure (5) and the energy storage unit (1) is charged at the same time, and the integrated electric drive bridge (2) drives the hydraulic component (4) of the on-board to operate through the power take-off structure (3).

2. The extended-range hybrid control method according to claim 1, characterized in that: When the power level of the energy storage unit (1) is not lower than the pure electric mode threshold and the power take-off structure (3) is not working, the construction machinery automatically adopts the pure electric mode to perform the disembarkation operation; When the power level of the energy storage unit (1) is not lower than the pure electric mode threshold and the power take-off structure (3) is working, the construction machinery automatically adopts the pure electric mode to perform the on-board operation.

3. The extended-range hybrid control method according to claim 1 or 2, characterized in that: When the power level of the energy storage unit (1) is lower than the pure electric mode threshold and not lower than the first threshold, and the power take-off structure (3) is not working, the engineering machinery automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure (5) adopts the first power generation, and the energy storage unit (1) and the extended-range structure (5) simultaneously supply power to the integrated electric drive bridge (2); When the power level of the energy storage unit (1) is lower than a first threshold and the power take-off structure (3) is not working, the engineering machine automatically adopts the extended-range mode to perform the disembarkation operation. At this time, the extended-range structure (5) uses the second power to generate electricity. A portion of the electric energy generated by the extended-range structure (5) is used to charge the energy storage unit (1), and another portion is used to supply power to the integrated electric drive bridge (2); The first power is smaller than the second power.

4. The extended-range hybrid control method according to claim 3, characterized in that: When the range-extending structure (5) uses the second power to generate electricity and charges the energy storage unit (1), when the power level of the energy storage unit (1) reaches a second threshold, the range-extending structure (5) stops generating electricity, and the engineering machinery automatically switches to a pure electric mode for disembarking operations.

5. The extended-range hybrid control method according to claim 1 or 2, characterized in that: When the power level of the energy storage unit (1) is lower than the pure electric mode threshold and the power take-off structure (3) is working, the engineering machinery automatically adopts the extended-range mode to perform on-board operations. At this time, the extended-range structure (5) uses the third power generation. A portion of the electric energy generated by the extended-range structure (5) is used to charge the energy storage unit (1), and another portion is used to supply power to the integrated electric drive bridge (2). The integrated electric drive bridge (2) drives the hydraulic component (4) on the vehicle to operate through the power take-off structure (3).

6. The extended-range hybrid control method according to claim 5, characterized in that: When the range-extending structure (5) uses the third power to generate electricity and charges the energy storage unit (1), when the power level of the energy storage unit (1) reaches a third threshold, the range-extending structure (5) stops generating electricity, and the engineering machinery automatically switches to a pure electric mode for onboard operations.

7. The extended-range hybrid control method according to claim 1 or 2, characterized in that: When the vehicle boarding operation is performed in a pure electric mode, the electric hoisting structure (6) of the vehicle boarding is driven to operate by the energy storage unit (1); When the vehicle loading operation is performed in the extended-range mode, the electric hoisting structure (6) of the vehicle loading is driven to operate by the extended-range structure (5); and / or, The energy supply mode of the construction machinery also includes a plug-in mode. When the plug-in mode is used for on-board operation, the on-board charger (7) is connected to an external power source, and the on-board charger (7) charges the energy storage unit (1). The energy storage unit (1) supplies power to the integrated electric drive bridge (2), and the integrated electric drive bridge (2) drives the hydraulic component (4) of the on-board vehicle to operate through the power take-off structure (3); and / or, The functional mode of the engineering machinery also includes a forced power generation mode. When the engineering machinery is in a neutral state and the power level of the energy storage unit (1) is lower than the forced power generation mode threshold, the energy storage unit (1) is charged through the range-extending structure (5). When the power level of the energy storage unit (1) reaches a fourth threshold, the range-extending structure (5) stops generating power.

8. An extended-range hybrid power system, using the extended-range hybrid power control method according to any one of claims 1 to 7, characterized in that: include: Energy storage unit (1); The range-extending structure (5) is electrically connected to the energy storage unit (1); An integrated electric drive bridge (2) is electrically connected to the energy storage unit (1) and the range-extending structure (5); The power take-off structure (3) is transmission-connected to the integrated electric drive bridge (2), and the power take-off structure (3) is transmission-connected to the on-board hydraulic assembly (4).

9. The extended-range hybrid system according to claim 8, characterized in that: The range-extending structure (5) comprises an engine (51) and a generator (52), wherein the engine (51) is suitable for driving the generator (52) to generate electricity; and / or, The range-extending structure (5) is arranged at the lower part of the engineering machinery.

10. An engineering machine, characterized in that: Including the extended-range hybrid system as described in claim 8 or 9.

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