Extended-range hybrid control method, system and engineering machine

Abstract

The application relates to the technical field of engineering machinery, and discloses a range-extending hybrid control method and system and engineering machinery. The working state of the engineering machinery includes off-board working and on-board working. The energy supply mode of the engineering machinery includes a pure electric mode and a range-extending mode. The off-board working can be performed in the pure electric mode, the on-board working can be performed in the pure electric mode, the off-board working can be performed in the range-extending mode, and the on-board working can be performed in the range-extending mode. The application makes the off-board working and the on-board working of the engineering machinery have the pure electric mode and the range-extending mode, can meet the requirements of long-time off-board driving and on-board working, solves the endurance anxiety problem of the user for the engineering machinery, has strong adaptability to the environment, and has a wide application range.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a range-extended hybrid power control method, system, and engineering machinery. Background Technology

[0002] Traditional construction machinery is powered by engines. Prolonged engine operation generates high levels of pollution and noise, negatively impacting the environment and the health of drivers. Furthermore, the energy required for operation on traditional construction machinery is typically supplied by a hydraulic pump driven by the engine. However, due to the engine's high power output, it often operates outside its efficient range, resulting in energy waste. With the advancement of new energy strategies, construction machinery is also moving towards electrification. However, pure electric vehicles are limited by battery capacity, facing the problem of insufficient battery power, affecting operational efficiency; plug-in hybrid vehicles require a stable power supply in the working environment, placing higher demands on the operating conditions. 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 for the operating environment of existing engineering machinery.

[0004] In a first aspect, the present invention provides a range-extended hybrid power control method, wherein the working state of the construction machinery includes unloading operation and loading operation, and the power supply mode of the construction machinery includes pure electric mode and range-extended mode, wherein when unloading operation is performed in pure electric mode, the integrated electric drive bridge is powered through an energy storage unit.

[0005] When operating the vehicle 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 performing off-vehicle operations in range-extended mode, the integrated electric drive axle is powered by both the energy storage unit and the range-extending structure, or the integrated electric drive axle is powered by the range-extending structure while the energy storage unit is charged.

[0007] When using the range-extended mode for onboard operations, the range-extended structure supplies power to the integrated electric drive axle and simultaneously charges the energy storage unit. The integrated electric drive axle then drives the hydraulic components of the onboard unit through the power take-off structure.

[0008] Beneficial effects: The integrated electric drive axle with an added power take-off structure provides a power source for the hydraulic components on the upper vehicle. Compared to traditional gearbox power take-off or oil pump motor operation, it reduces space occupation, improves powertrain efficiency, and saves costs. Furthermore, the control method of this invention enables both unloading and loading operations of the construction machinery to have pure electric and range-extended modes, meeting the needs of long-term unloading and loading operations, solving users' range anxiety regarding construction machinery, and demonstrating strong environmental adaptability and a wide range of applications.

[0009] In one optional implementation, when the energy storage unit’s charge is not lower than the pure electric mode threshold and the power take-off structure is not working, the construction machinery automatically adopts pure electric mode for unloading operations.

[0010] When the energy storage unit's charge is not lower than the pure electric mode threshold and the power take-off structure is working, the construction machinery will automatically use pure electric mode for onboard operations.

[0011] In one optional implementation, when the energy storage unit’s charge 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 construction machinery automatically adopts the range-extending mode to perform off-vehicle operations. At this time, the range-extending structure generates electricity at the first power, and the energy storage unit and the range-extending structure simultaneously supply power to the integrated electric drive bridge.

[0012] When the energy storage unit's charge is below the first threshold and the power take-off structure is not working, the construction machinery automatically adopts the range-extending mode to perform off-vehicle operations. At this time, the range-extending structure uses the second power generation. Part of the electrical energy generated by the range-extending structure is used to charge the energy storage unit, and the other part is used to power the integrated electric drive bridge.

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

[0014] Beneficial effects: The range extender does not participate in the direct drive of the vehicle, but only provides power to the energy storage unit and the integrated electric drive axle, which allows the range extender to always operate in the economic range and improves energy efficiency.

[0015] In one alternative implementation, when the range extender uses a second power source to generate electricity and charge the energy storage unit, the range extender stops generating electricity when the energy storage unit reaches a second threshold, and the construction machinery automatically switches to pure electric mode for unloading operations.

[0016] Beneficial effects: The off-vehicle operation mode automatically switches according to the power of the energy storage unit, improving the automation level of construction machinery and making it more energy-efficient and environmentally friendly.

[0017] In one optional implementation, when the energy storage unit's charge is lower than the pure electric mode threshold and the power take-off structure is working, the construction machinery automatically adopts the range-extending mode for onboard operations. At this time, the range-extending structure uses a third power generator, and part of the electrical energy generated by the range-extending structure is used to charge the energy storage unit, while the other part powers the integrated electric drive axle. The integrated electric drive axle drives the hydraulic components of the onboard vehicle through the power take-off structure.

[0018] Beneficial effects: The range extender does not participate in the direct drive of the vehicle, but only provides power to the energy storage unit and the integrated electric drive axle, which allows the range extender to always operate in the economic range and improves energy efficiency.

[0019] In one alternative implementation, when the range extender uses a third power source to generate electricity and charge the energy storage unit, the range extender stops generating electricity when the energy storage unit reaches a third threshold, and the construction machinery automatically switches to pure electric mode for onboard operations.

[0020] Beneficial effects: The on-board operation mode automatically switches according to the power of the energy storage unit, improving the automation level of construction machinery and making it more energy-efficient and environmentally friendly.

[0021] In one alternative implementation, when performing onboard operations in pure electric mode, the electric winch structure on the onboard unit is driven to operate via an energy storage unit.

[0022] When using the range-extended mode for onboard operations, the electric winch structure on the onboard unit is driven by the range-extended structure; and / or,

[0023] The power supply modes for construction machinery also include plug-in mode. When operating on-board in plug-in mode, the on-board charger is connected to an external power source to charge the energy storage unit. The energy storage unit then powers the integrated electric drive axle, which in turn drives the hydraulic components of the on-board unit via a power take-off structure; and / or,

[0024] The functional modes of construction machinery also include a forced power generation mode. When the construction machinery is in an idle state and the energy storage unit’s power is lower than the forced power generation mode threshold, the range extender structure charges the energy storage unit. When the energy storage unit’s power reaches the fourth threshold, the range extender structure stops generating electricity.

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

[0026] Secondly, the present invention also provides a range-extended hybrid power system, which applies the above-mentioned range-extended hybrid power control method, comprising: an energy storage unit; a range-extending structure electrically connected to the energy storage unit; an integrated electric drive axle electrically connected to both the energy storage unit and the range-extending structure; and a power take-off structure driveably connected to the integrated electric drive axle, wherein the power take-off structure is driveably connected to the upper vehicle hydraulic components.

[0027] In one alternative embodiment, the range extender includes an engine and a generator, the engine being adapted to drive the generator to generate electricity; and / or, the range extender is disposed at the undercarriage of the construction machinery.

[0028] Thirdly, the present invention also provides an engineering machine including the above-mentioned range-extended hybrid power system. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is 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 range-extended hybrid power system of the present invention performing off-vehicle operations in pure electric mode (shaded areas represent working components);

[0032] Figure 3 This is a schematic diagram of the range-extended hybrid power system of this invention being operated on a vehicle in pure electric mode (shaded areas represent working components);

[0033] Figure 4 This is a schematic diagram of the range-extended hybrid power system of the present invention performing off-vehicle operations in range-extended mode (shaded areas represent working components);

[0034] Figure 5 This is a schematic diagram of the range-extended hybrid power system of the present invention when it is used in the range-extended mode for on-vehicle operation (the shaded part represents the working part);

[0035] Figure 6 This is a schematic diagram of the range-extended hybrid power system in forced power generation mode according to an embodiment of the present invention (the shaded areas represent working components);

[0036] Figure 7This is a schematic diagram of the extended-range hybrid system of the present invention being operated on a vehicle in plug-in mode (the shaded areas represent working components).

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Energy storage unit; 2. Integrated electric drive axle; 3. Power take-off structure; 4. Hydraulic components; 41. Hydraulic oil pump; 5. Range extender 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 Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0041] According to an embodiment of the present invention, in one aspect, a range-extended hybrid power control method is provided, wherein the operating states of the construction machinery include unloading operations and loading operations, and the power supply modes of the construction machinery include pure electric mode and range-extended mode, wherein:

[0042] When performing unloading operations in pure electric mode, the integrated electric drive bridge 2 is powered through the energy storage unit 1;

[0043] When the vehicle is operated 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 components 4 of the vehicle through the power take-off structure 3.

[0044] When performing off-vehicle operations in range-extended mode, the integrated electric drive axle 2 is powered by both the energy storage unit 1 and the range-extending structure 5, or the integrated electric drive axle 2 is powered by the range-extending structure 5 and the energy storage unit 1 is charged at the same time.

[0045] When using the range-extended mode for onboard operations, the range-extended structure 5 supplies power to the integrated electric drive axle 2 and simultaneously charges the energy storage unit 1. The integrated electric drive axle 2 drives the hydraulic components 4 of the onboard unit through the power take-off structure 3.

[0046] The range-extended hybrid power control method of this embodiment employs an integrated electric drive axle 2 with an added power take-off structure 3 to provide power to the upper hydraulic components 4. Compared to traditional gearbox power take-off or oil pump motor operation, this reduces space occupation, improves powertrain efficiency, and saves costs. Furthermore, the control method of this embodiment allows both unloading and loading operations of the construction machinery to have pure electric and range-extended modes, meeting the needs of long-term unloading and loading operations, alleviating users' range anxiety regarding construction machinery, and demonstrating strong environmental adaptability and a wide range of applications.

[0047] In one embodiment, such as Figure 2 As shown, when the energy storage unit 1 has a charge level not lower than the pure electric mode threshold and the power take-off structure 3 is not working, the construction machinery automatically uses pure electric mode to perform unloading operations. At this time, the energy storage unit 1 has sufficient charge and can supply power to the integrated electric drive bridge 2 through the energy storage unit 1 alone, enabling the construction machinery to move; the range extender structure 5 is in a stopped state.

[0048] In one embodiment, such as Figure 3 As shown, when the power 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 for onboard operations.

[0049] In one embodiment, such as Figure 3 As shown, when using pure electric mode for onboard operations, the electric winch structure 6 on the onboard unit is driven to operate through the energy storage unit 1.

[0050] It is worth noting that when the vehicle is operating in pure electric mode, the energy storage unit 1 has sufficient power and can supply power to the integrated electric drive bridge 2 and the electric winch structure 6 through the energy storage unit 1 alone. It can also drive the hydraulic components 4 through the power take-off structure 3, so that the hydraulic components 4 of the vehicle can work and realize the winch, slewing, luffing, telescopic and outrigger operations of the vehicle. At this time, the range extender structure 5 is in the stopped state.

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

[0052] In one embodiment, such as 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 construction machinery automatically adopts the range-extending mode to carry out the off-vehicle operation. At this time, the range-extending structure 5 generates electricity with the first power, and the energy storage unit 1 and the range-extending 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 construction machinery automatically adopts the range extension mode to carry out off-vehicle operations. At this time, the range extension structure 5 uses the second power to generate electricity. Part of the electrical energy generated by the range extension 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 less than the second power.

[0055] It is worth noting that the range extender structure 5 does not participate in the direct drive of the vehicle, but only provides power to the energy storage unit 1 and the integrated electric drive axle 2, which allows the range extender structure 5 to always operate in the economic range and improve energy efficiency.

[0056] It should be noted that when the energy storage unit 1's power is below the pure electric mode threshold, but the power is still relatively sufficient, the range extender structure 5 generates electricity at low power. Part of the power of the integrated electric drive bridge 2 comes from the range extender structure 5, and the other part comes from the energy storage unit 1, thus enabling the construction machinery to extend its range. When the energy storage unit 1's power is insufficient, the range extender structure 5 generates electricity at high power. Part of the generated electricity is used to charge the energy storage unit 1, and the other part is used to drive the integrated electric drive bridge 2.

[0057] Furthermore, when the range extender 5 uses a second power source to generate electricity and charge the energy storage unit 1, the range extender 5 stops generating electricity when the energy storage unit 1 reaches a second threshold, and the construction machinery automatically switches to pure electric mode for unloading operations. This design allows the unloading operation mode to automatically switch according to the energy storage unit 1's charge level, improving the automation level of the construction machinery and making it more energy-efficient and environmentally friendly.

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

[0059] In one embodiment, such as Figure 5 As shown, when the power of the energy storage unit 1 is lower than the threshold of the pure electric mode and the power take-off structure 3 is working, the construction machinery automatically adopts the range-extending mode for on-vehicle operation. At this time, the range-extending structure 5 uses the third power generation. Part of the electrical energy generated by the range-extending 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 components 4 of the on-vehicle to operate through the power take-off structure 3.

[0060] In one embodiment, such as Figure 5 As shown, when using the extended range mode for onboard operations, the electric winch structure 6 on the onboard unit is driven to operate through the extended range structure 5.

[0061] It is worth noting that the range extender structure 5 does not participate in the direct drive of the vehicle, but only provides power to the energy storage unit 1, the integrated electric drive axle 2 and the electric hoist structure 6, which allows the range extender structure 5 to always operate in the economic range and improve energy efficiency.

[0062] It should be noted that the third power is greater than the first power. That is, when using the range-extended mode for onboard operations, the range-extended structure 5 generates high-power electricity. Part of the generated electricity is used to charge the energy storage unit 1, and the other part is used to power the integrated electric drive axle 2 and the electric winch structure 6. The power take-off structure 3 drives the hydraulic components 4 to achieve range-extended onboard operations.

[0063] In one embodiment, such as Figures 1 to 7 As shown, the range extender structure 5 includes an engine 51 and a generator 52 coupled together. Different power generation can be selected by switching between different modes. The engine 51 does not provide driving force to the vehicle, but only drives the generator 52 to generate electricity. This setting allows the engine 51 to always work in the economic range, improves fuel efficiency, and achieves fuel saving.

[0064] Furthermore, when the range extender 5 uses the third power source to generate electricity and charge the energy storage unit 1, the range extender 5 stops generating electricity when the energy storage unit 1 reaches the third threshold, and the construction machinery automatically switches to pure electric mode for onboard operations. This design allows the onboard operation mode to automatically switch according to the energy storage unit 1's charge level, improving the automation level of the construction machinery and making it more energy-efficient and environmentally friendly.

[0065] In one embodiment, such as Figure 6 As shown, the functional modes of the construction machinery also include a forced power generation mode. When the construction machinery is in an idle state and the power of the energy storage unit 1 is lower than the forced power generation mode threshold, the range extender structure 5 charges the energy storage unit 1. When the power of the energy storage unit 1 reaches the fourth threshold, the range extender structure 5 stops generating electricity.

[0066] It is worth noting that in the forced power generation mode, the range extender structure 5 can generate electricity at a high power output.

[0067] In one embodiment, such as Figure 7 As shown, the power supply mode of the construction machinery also includes the plug-in mode. When the plug-in mode is used for on-vehicle operation, the on-board charger 7 is connected to an external power source to charge the energy storage unit 1. The energy storage unit 1 supplies power to the integrated electric drive axle 2. The integrated electric drive axle 2 drives the hydraulic components 4 of the on-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 AC charging mode, and the vehicle requests onboard operation, the construction machinery automatically adopts plug-in mode for onboard operation. At this time, the range extender structure 5 is in a stopped state, and the energy storage unit 1 is charged through the onboard 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 components 4 through the power take-off structure 3 to realize the plug-in operation mode.

[0069] According to an embodiment of the present invention, in another aspect, a range-extended hybrid power system is also provided, which applies the above-described range-extended hybrid power control method, such as... Figure 1 As shown, it includes: an energy storage unit 1, a range extender structure 5, an integrated electric drive axle 2, and a power take-off structure 3. The range extender structure 5 is electrically connected to the energy storage unit 1, the integrated electric drive axle 2 is electrically connected to both the energy storage unit 1 and the range extender structure 5, the power take-off structure 3 is drive-connected to the integrated electric drive axle 2, and the power take-off structure 3 is drive-connected to the upper vehicle hydraulic assembly 4.

[0070] In one embodiment, such as Figure 1 As shown, the hydraulic assembly 4 includes a hydraulic pump 41, a slewing hydraulic circuit, a luffing hydraulic circuit, a telescopic hydraulic circuit, outriggers, and auxiliary hydraulic circuits. The power take-off structure 3 is adapted to drive the hydraulic pump 41, which supplies hydraulic oil to each hydraulic circuit.

[0071] In one embodiment, such as Figure 1 As shown, the vehicle is also equipped with an electric hoisting structure 6, and the energy storage unit 1 and the range extender 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 extender structure 5 are adapted to provide electrical energy to the hoisting motor 61, and the hoisting motor 61 is adapted to drive the hoisting mechanism 62. This arrangement enables the hoisting motor 61 to recover energy and charge the energy storage unit 1.

[0072] In one embodiment, such as Figure 1 As shown, the range extender structure 5 includes an engine 51 and a generator 52, with the engine 51 adapted to drive the generator 52 to generate electricity.

[0073] In one embodiment, such as Figure 1 As shown, the range extender structure 5 is located at the bottom of the engineering machinery.

[0074] In one embodiment, such as Figure 1 As shown, the range-extended hybrid system also includes an on-board charger 7, which is electrically connected to the energy storage unit 1. The on-board charger 7 is adapted to connect to an external power source and charge the energy storage unit 1.

[0075] In one embodiment, such as Figure 1 As shown, the range-extended hybrid system also includes an all-in-one controller 8, which is electrically connected to the energy storage unit 1, the generator 52, the integrated electric drive bridge 2, and the hoist 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 unit.

[0077] According to an embodiment of the present invention, in another aspect, an engineering machine is also provided, including the above-described range-extended hybrid power system.

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

Claims

1. A control method for a range-extended hybrid electric vehicle, characterized in that, The operating states of construction machinery include unloading operations and loading operations; the power supply modes of construction machinery include pure electric mode and range-extended mode. When the vehicle is disembarking in pure electric mode, the integrated electric drive bridge (2) is powered by the energy storage unit (1); When the vehicle is operated 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 components (4) of the vehicle through the power take-off structure (3); the integrated electric drive axle with added power take-off structure provides a power source for the hydraulic components of the vehicle. When performing off-vehicle operations in range-extended mode, the integrated electric drive bridge (2) is powered by the energy storage unit (1) and the range-extending structure (5) at the same time, or the integrated electric drive bridge (2) is powered by the range-extending structure (5) and the energy storage unit (1) is charged at the same time. When using the range-extending mode for onboard operations, the range-extending structure (5) supplies power to the integrated electric drive axle (2) and simultaneously charges the energy storage unit (1). The integrated electric drive axle (2) drives the hydraulic components (4) of the onboard unit through the power take-off structure (3). The integrated electric drive axle with an added power take-off structure provides a power source for the hydraulic components of the onboard unit. 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 construction machinery automatically adopts the range extension mode to carry out the off-vehicle operation. At this time, the range extension structure (5) generates electricity with the first power, and the energy storage unit (1) and the range extension structure (5) simultaneously supply power to the integrated electric drive bridge (2). 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 construction machinery automatically adopts the range extension mode to carry out off-vehicle operation. At this time, the range extension structure (5) uses the second power to generate electricity. Part of the electrical energy generated by the range extension 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 range extender structure does not participate in the direct drive of the vehicle, but only provides power to the energy storage unit and the integrated electric drive axle; wherein, the first power is less than the second power; When the power of the energy storage unit (1) is lower than the threshold of the pure electric mode and the power take-off structure (3) is working, the construction machinery automatically adopts the range-extending mode to carry out the on-vehicle operation. At this time, the range-extending structure (5) uses the third power to generate electricity. Part of the electrical energy generated by the range-extending 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 components (4) of the on-vehicle to operate through the power take-off structure (3). The range extender structure does not participate in the direct drive of the vehicle; it only provides power to the energy storage unit and the integrated electric drive axle.

2. The range-extended hybrid power control method according to claim 1, characterized in that, When the power 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 carry out the unloading operation. When the power 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 for onboard operation.

3. The range-extended hybrid power control method according to claim 1, characterized in that, When the range extender (5) generates electricity using the second power and charges the energy storage unit (1), when the energy storage unit (1) reaches the second threshold, the range extender (5) stops generating electricity, and the construction machinery automatically switches to pure electric mode for unloading operations.

4. The range-extended hybrid power control method according to claim 1 or 2, characterized in that, When the range extender (5) generates electricity using the third power and charges the energy storage unit (1), when the energy storage unit (1) reaches the third threshold, the range extender (5) stops generating electricity, and the construction machinery automatically switches to pure electric mode for onboard operation.

5. The range-extended hybrid power control method according to claim 1 or 2, characterized in that, When the vehicle is used in pure electric mode for onboard operation, the electric winch structure (6) of the vehicle is driven to operate through the energy storage unit (1); When using the extended range mode for onboard operations, the electric winch structure (6) of the onboard unit is driven to operate via the extended range structure (5); and / or, The power supply mode of the construction machinery also includes a plug-in mode. When using the plug-in mode for onboard operation, the onboard charger (7) is connected to an external power source to charge the energy storage unit (1). The energy storage unit (1) supplies power to the integrated electric drive axle (2), which in turn drives the hydraulic components (4) of the onboard machinery through the power take-off structure (3); and / or, The functional modes of the construction machinery also include a forced power generation mode. When the construction machinery is in an idle state and the power of the energy storage unit (1) is lower than the forced power generation mode threshold, the range extender (5) charges the energy storage unit (1). When the power of the energy storage unit (1) reaches the fourth threshold, the range extender (5) stops generating electricity.

6. A range-extended hybrid power system, employing the range-extended hybrid power control method according to any one of claims 1 to 5, characterized in that, include: Energy storage unit (1); The range extender 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 extender structure (5); The power take-off structure (3) is connected to the integrated electric drive axle (2) and the power take-off structure (3) is connected to the upper hydraulic assembly (4).

7. The range-extended hybrid power system according to claim 6, characterized in that, The range extender structure (5) includes an engine (51) and a generator (52), the engine (51) being adapted to drive the generator (52) to generate electricity; and / or, The range extender structure (5) is located at the bottom of the engineering machinery.

8. An engineering machinery, characterized in that, Includes the range-extended hybrid power system as described in claim 6 or 7.

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