Hybrid work machine and hybrid control method

Abstract

The invention relates to the technical field of operation machinery, and discloses hybrid power operation machinery and a hybrid power control method. A hybrid work machine includes a lower vehicle including: a lower vehicle body; the power system is arranged on the lower vehicle main body and comprises a lower vehicle engine, a first clutch, a generator, a second clutch, a driving motor, an energy storage device, a battery management system and an all-in-one controller, and the lower vehicle engine, the first clutch, the generator, the second clutch and the driving motor are sequentially connected; the energy storage device and the generator are electrically connected with the battery management system; the all-in-one controller is electrically connected with the driving motor and the battery management system; and the walking mechanism is connected with the driving motor. The engine drives the generator to generate electricity, the generator provides driving force for the driving motor, the mileage of the operation machine is increased, and the cruising ability of the vehicle is remarkably prolonged; during parking, the engine drives the generator to generate electricity, and parking time is fully utilized to charge the energy storage device.

Description

Technical Field

[0001] The present invention relates to the technical field of working machines, and in particular to a hybrid power working machine and a hybrid power control method. Background Art

[0002] With the continuous changes in new energy vehicle technology and market demand, the development direction of new vehicles will also continue to change, and operating machinery also needs to be combined with advanced technology. Cranes and other operating machinery are an indispensable part of engineering operations. While ensuring the quality and efficiency of engineering operations, the development direction should conform to the development direction of the times and science and technology, and new energy technologies need to be applied to engineering machinery.

[0003] Traditional operating machinery is still highly dependent on fossil fuels. For example, traditional lifting machinery still has problems of high energy consumption and high pollution emissions when traveling or operating. Most of its energy is supplied by the engine, and the carbon emissions are too high. At the same time, the engine of the crane is always running when operating, which will produce a lot of noise, causing negative impacts on the environment and the physical and mental health of the driver.

[0004] In order to realize the electrification transformation of cranes, it is necessary to design various new energy system architectures based on lifting machinery, such as pure electric and plug-in models. However, pure electric models are prone to low battery during driving or operation, which may lead to endurance problems. Plug-in models have higher requirements for the operating environment and require stable and professional power supply equipment for engineering machinery during operation. Summary of the invention

[0005] In view of this, the present invention provides a hybrid working machine and a hybrid power control method to solve the problem of insufficient battery power in pure electric vehicles.

[0006] In the first aspect, the present invention provides a hybrid working machinery, including an undercarriage, which includes: an undercarriage body; a power system, which is arranged on the undercarriage body, and the power system includes an undercarriage engine, a first clutch, a generator, a second clutch, a drive motor, an energy storage device, a battery management system and an all-in-one controller, the undercarriage engine, the first clutch, the generator, the second clutch, and the drive motor are connected in sequence, the energy storage device and the generator are electrically connected to the battery management system, and the all-in-one controller is electrically connected to the drive motor and the battery management system; a walking mechanism is connected to the drive motor; wherein the undercarriage has an extended-range driving mode, a pure electric driving mode and a parking charging mode; when the undercarriage is in the extended-range driving mode, the first clutch and the second clutch are both closed; when the undercarriage is in the pure electric driving mode, the first clutch and the second clutch are both disconnected; when the undercarriage is in the parking charging mode, the first clutch is closed and the second clutch is disconnected.

[0007] Beneficial effects: When driving, when the energy storage device has sufficient power, the first clutch and the second clutch are controlled to be disconnected, and the energy storage device provides power for the drive motor, so that the operating machine enters the pure electric driving mode; when driving, when the energy storage device has insufficient power, the first clutch and the second clutch are controlled to be closed, and the engine drives the generator to generate electricity, and the generator provides driving force for the drive motor, thereby increasing the mileage of the operating machine and significantly extending the vehicle's endurance; when parking, the first clutch is controlled to be closed and the second clutch is disconnected, and the operating machine enters the parking charging mode, and the engine drives the generator to generate electricity, thereby charging the energy storage device, and making full use of the parking time to charge the energy storage device, which can avoid interrupting the construction progress due to charging and improve the utilization rate of the equipment and the overall work efficiency.

[0008] In an optional embodiment, the hybrid working machine also includes an upper vehicle, which includes: an upper vehicle body, rotatably arranged on the lower vehicle body; an upper vehicle working drive component, arranged on the upper vehicle body, and an energy storage device or an engine providing power for the working drive component; an upper vehicle working mechanism, connected to the upper vehicle working drive component; wherein the upper vehicle has a pure electric working mode and an extended-range working mode; when the upper vehicle is in the pure electric working mode, the energy storage device provides power for the working drive component; when the upper vehicle is in the extended-range working mode, the engine provides power for the working drive component.

[0009] Beneficial effects: During operation, when the power of the energy storage device is sufficient or greater than the set threshold, the first clutch and the second clutch are controlled to be disconnected, and the energy storage device provides power for the on-board operating drive, so that the operating machine enters the pure electric operating mode; during the operation process, when the power of the energy storage device is insufficient or consumed to the set threshold, the first clutch is controlled to close, so that the on-board enters the extended-range operating mode, and the engine drives the generator to generate electricity, and the generator provides power for the on-board operating parts, thereby extending the operating time of the operating machinery, which can significantly extend the vehicle's operating capacity; when the electric energy generated by the generator exceeds the electric energy required by the on-board operating drive, the excess electric energy is used to charge the energy storage device to prevent energy waste.

[0010] In an optional embodiment, the on-board operating drive component is an oil pump motor, which is electrically connected to the all-in-one controller; when the on-board is in a pure electric operating mode, the first clutch and the second clutch are both disconnected; when the on-board is in an extended-range operating mode, the first clutch is closed and the second clutch is disconnected; or, the on-board operating drive component is a hydraulic oil pump, and the off-board also includes a gearbox and a power take-off arranged on the off-board body, the drive motor is connected to the walking mechanism through the gearbox, and the gearbox is connected to the hydraulic oil pump through the power take-off; when the on-board is in a pure electric operating mode, the first clutch and the second clutch are both disconnected; when the on-board is in an extended-range operating mode, the first clutch and the second clutch are both closed.

[0011] Beneficial effects: The oil pump motor provides driving force for the slewing mechanism, luffing mechanism, and telescopic mechanism. The oil pump motor can achieve very precise speed and position control through the motor controller to ensure the accuracy of each action; it can quickly respond to control signals, achieve rapid start and stop, and improve work efficiency; the motor has high energy conversion efficiency and can efficiently convert electrical energy into mechanical energy to reduce energy loss. The power take-off is connected from the gearbox of the vehicle, and the hydraulic oil pump is used as the power source during the vehicle operation. The hydraulic system can provide strong driving force, precise control and high reliability, and is particularly suitable for applications that require large driving force, such as telescopic, luffing and slewing of the crane arm.

[0012] In an optional embodiment, getting off the vehicle also includes an on-board charger, which is arranged on the getting off body and electrically connected to the energy storage device; getting on the vehicle also has a plug-in operation mode. When the getting on the vehicle is in the plug-in operation mode, the first clutch and the second clutch are both disconnected.

[0013] Beneficial effect: When the working site is equipped with power supply, after the charging gun on the external power supply is inserted into the charging port of the on-board charger, the power of the external power supply is transmitted to the oil pump motor, thereby driving the on-board operating mechanism to operate. At the same time, the external power supply can charge the energy storage device, making full use of the time for charging, and can instantly replenish the battery energy.

[0014] In an optional embodiment, the vehicle also has an energy recovery mode in which the driving motor is reversed to drive the generator to generate electricity during coasting or braking.

[0015] Beneficial effect: When the operating machine is coasting or braking, the first clutch is controlled to be disconnected, and the second clutch is controlled to be closed, and the driving motor drives the generator to generate electricity, thereby charging the energy storage device, and improving the energy utilization efficiency by recovering and reusing the energy generated during braking or coasting.

[0016] In a second aspect, the present invention also provides a hybrid power control method for controlling the above-mentioned hybrid power working machinery, and the hybrid power control method includes the following steps: judging whether the vehicle is in a driving state; if the vehicle is in a parking state, controlling the vehicle to enter a parking charging mode; if the vehicle is in a driving state, judging whether the power of the energy storage device is greater than a set threshold; when the power of the energy storage device is greater than the set threshold, controlling the vehicle to enter a pure electric driving mode; if the power of the energy storage device is not greater than the set threshold, controlling the vehicle to enter an extended-range driving mode.

[0017] Beneficial effects: The above control method realizes the pure electric mode, extended-range mode and charging mode of the vehicle. In the pure electric mode, the vehicle can be directly driven by the power battery to drive the whole vehicle, which improves the adaptability of the vehicle under certain special working conditions, improves the fuel utilization efficiency and achieves the purpose of fuel saving; in the extended-range mode, the engine drives the generator to supply power to the drive motor to drive the whole vehicle. The speed of the drive motor is adjusted to make the engine output more effective power, thereby reducing energy consumption.

[0018] In an optional implementation, after getting off the vehicle and entering the extended-range driving mode, the hybrid power control method further includes: adjusting the speed of the generator according to the driving conditions of getting off the vehicle, the current efficiency of the engine and the power of the energy storage device.

[0019] Beneficial effect: By adjusting the speed of the generator, the engine is in the best working state, so that the vehicle can provide sufficient power output with lower fuel consumption under high-load driving conditions.

[0020] In an optional implementation, the hybrid power control method further includes: when the vehicle is in an operating state, controlling the operating mode of the vehicle according to the power of the energy storage device and the operating power requirement of the vehicle.

[0021] Beneficial effects: According to the power of the energy storage device and the operating requirements, the operating mode is dynamically adjusted to ensure that the machine can perform at its best under different working conditions. It can also avoid excessive discharge of the battery, thereby reducing damage to the battery and extending the battery life.

[0022] In an optional embodiment, controlling the operating mode of the vehicle according to the power of the energy storage device and the operating power demand of the vehicle includes: when the power of the energy storage device is greater than a set threshold and greater than the power corresponding to the operating power demand of the vehicle, controlling the vehicle to enter a pure electric operating mode; when the power of the energy storage device is less than a set threshold or the power of the energy storage device is less than the power corresponding to the operating power demand of the vehicle, controlling the vehicle to enter an extended-range operating mode.

[0023] Beneficial effect: The vehicle enters the extended-range operation mode, and the engine drives the generator to generate electricity, which provides power to the working parts on the vehicle, thereby extending the operating time of the operating machinery and significantly extending the vehicle's operating capacity.

[0024] In an optional embodiment, the hybrid power control method further includes: when the on-board charger of the getting-off vehicle is connected to an external power supply, controlling the getting-off vehicle to be in a plug-in operation mode; when the getting-off vehicle is coasting or braking, controlling the getting-off vehicle to enter an energy recovery mode.

[0025] Beneficial effects: When the operating machine meets the plug-in operating environment, after the charging gun on the external power supply is inserted into the charging port of the on-board charger, the power of the external power supply is transmitted to the oil pump motor, which then drives the on-board operating mechanism to operate. At the same time, the external power supply can charge the energy storage device, making full use of the time for charging, and can instantly replenish the energy of the battery. By recovering and reusing the energy generated during braking or sliding, the energy utilization efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A structural block diagram of a hybrid working machine according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 The structural block diagram of the vehicle exiting in the extended range driving mode shown;

[0029] Figure 3 for Figure 1 The structural block diagram of the vehicle in pure electric driving mode shown;

[0030] Figure 4 for Figure 1 The structural block diagram of the vehicle in the parking power generation mode shown;

[0031] Figure 5 for Figure 1 The structural block diagram of the vehicle shown is in pure electric operation mode;

[0032] Figure 6 for Figure 1 The structural block diagram of the vehicle shown is in the extended range operation mode;

[0033] Figure 7 A structural block diagram of another hybrid working machine according to an embodiment of the present invention;

[0034] Figure 8 for Figure 7 The structural block diagram of the vehicle exiting in the extended range driving mode shown;

[0035] Fig. 9 for Figure 7 The structural block diagram of the vehicle in pure electric driving mode shown;

[0036] Fig.10 for Figure 7 The structural block diagram of the vehicle in the parking power generation mode shown;

[0037] Fig.11 for Figure 7 The structural block diagram of the vehicle shown is in pure electric operation mode;

[0038] Fig.12 for Figure 7 The structural block diagram of the vehicle shown is in the extended range operation mode.

[0039] Description of reference numerals:

[0040] 1. Get-off engine; 2. First clutch; 3. Generator; 4. Second clutch; 5. Drive motor; 6. Gearbox; 7. Drive axle; 8. Power battery; 9. Battery management system; 10. All-in-one controller; 11. Oil pump motor; 13. External power supply; 14. Slewing mechanism; 15. Booming mechanism; 16. Winch mechanism; 17. Power take-off; 18. Hydraulic oil pump; 21. First motor controller; 22. Second motor controller; 23. Third motor controller. DETAILED DESCRIPTION

[0041] 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.

[0042] Combine the following Figures 1 to 12 , describing an embodiment of the present invention.

[0043] According to an embodiment of the present invention, on the one hand, a hybrid working machine is provided, including an undercarriage, wherein the undercarriage includes: an undercarriage body, a power system and a traveling mechanism.

[0044] The power system is arranged on the get-off body, and the power system includes an get-off engine 1, a first clutch 2, a generator 3, a second clutch 4, a drive motor 5, an energy storage device, a battery management system 9 and an all-in-one controller 10. The get-off engine 1, the first clutch 2, the generator 3, the second clutch 4, and the drive motor 5 are connected in sequence, the energy storage device and the generator 3 are electrically connected to the battery management system 9, the all-in-one controller 10 is electrically connected to the drive motor 5 and the battery management system 9; the walking mechanism is connected to the drive motor 5.

[0045] Among them, getting off the vehicle has an extended-range driving mode, a pure electric driving mode and a parking charging mode; when getting off the vehicle is in the extended-range driving mode, the first clutch 2 and the second clutch 4 are both closed; when getting off the vehicle is in the pure electric driving mode, the first clutch 2 and the second clutch 4 are both disconnected; when getting off the vehicle is in the parking charging mode, the first clutch 2 is closed and the second clutch 4 is disconnected.

[0046] When the hybrid working machine of this embodiment is used, when the energy storage device is fully charged, the first clutch 2 and the second clutch 4 are both disconnected, and the energy storage device provides power to the drive motor 5, so that the working machine enters the pure electric driving mode (such as Figure 3 As shown); during driving, when the power of the energy storage device is insufficient, the first clutch 2 and the second clutch 4 are controlled to be closed, and the generator 3 is driven by the engine to generate electricity. The generator 3 provides driving force for the drive motor 5, thereby increasing the mileage of the operating machinery and significantly extending the vehicle's endurance; when parking, the first clutch 2 is controlled to be closed and the second clutch 4 is disconnected, and the operating machinery enters the parking charging mode, and the generator 3 is driven by the engine to generate electricity, thereby charging the energy storage device. The parking time is fully utilized to charge the energy storage device, which can avoid interrupting the construction progress due to charging and improve the utilization rate of the equipment and the overall work efficiency.

[0047] It should be noted that the English abbreviation of battery management system is BMS. Sufficient power of the energy storage device means that the power exceeds a set threshold. For example, the set threshold is 45% or 50%. It can be understood that the set threshold can also be adjusted according to specific needs, and is not limited to this.

[0048] It is worth noting that the first clutch 2 and the second clutch 4 can both adopt the structure of the existing technology, which will not be described in detail here.

[0049] Furthermore, the main body of the vehicle is specifically the chassis. The chassis is the basic platform of the operating machinery and is usually made of high-strength steel to ensure sufficient strength and rigidity to meet the maximum load capacity and stability of the operating machinery while also ensuring good driving performance.

[0050] Furthermore, the traveling mechanism includes a drive axle 7, wheels or tracks, etc. The drive motor 5 is connected to the drive axle 7 through a gearbox 6. When the operating machine enters the extended-range driving mode, the driving power of the drive axle 7 comes from the off-vehicle engine 1. At this time, the first clutch 2 and the second clutch 4 are both closed, and the off-vehicle engine 1 drives the generator 3 to generate electricity. The generator 3 provides driving force for the drive motor 5, thereby driving the drive axle 7 to drive the wheels or tracks to move.

[0051] It should be noted that the main body of the vehicle and the traveling mechanism can adopt the structures in the prior art, which will not be described in detail here.

[0052] In one embodiment, Figure 5 , Figure 6 , Fig.11 and Fig.12 As shown, the hybrid operating machinery also includes an upper vehicle, which includes: an upper vehicle body, an upper vehicle operating drive component and an upper vehicle operating mechanism, wherein the upper vehicle body is rotatably arranged on the lower vehicle body; the upper vehicle operating drive component is arranged on the upper vehicle body, and an energy storage device or an engine provides power for the operating drive component; the upper vehicle operating mechanism is connected to the upper vehicle operating drive component.

[0053] Among them, the vehicle has a pure electric operation mode and an extended-range operation mode; when the vehicle is in the pure electric operation mode, the energy storage device provides power for the operating drive components; when the vehicle is in the extended-range operation mode, the engine provides power for the operating drive components.

[0054] During operation, when the power of the energy storage device is sufficient or greater than the set threshold, the first clutch 2 and the second clutch 4 are controlled to be disconnected, and the energy storage device provides power for the on-board operating drive, so that the operating machine enters the pure electric operating mode; during the operation process, when the power of the energy storage device is insufficient or consumed to the set threshold, the first clutch 2 is controlled to close, so that the on-board enters the extended-range operating mode, and the engine drives the generator 3 to generate electricity, and the generator 3 provides power for the on-board operating parts, thereby extending the operating time of the operating machine, which can significantly extend the operating capacity of the vehicle; when the electric energy generated by the generator 3 exceeds the electric energy required by the on-board operating drive, the excess electric energy is used to charge the energy storage device to prevent waste of electric energy.

[0055] Furthermore, the upper vehicle body includes an upper vehicle platform, etc. The upper vehicle platform is connected to the lower vehicle body through a slewing mechanism 14. The upper vehicle platform is the basic structure of the upper vehicle part of the operating machinery, which is used to install and support other upper vehicle components. The slewing mechanism 14 includes a slewing bearing, a slewing drive component, etc.

[0056] In one embodiment, Figure 5 and Figure 6 As shown, the vehicle operation drive is an oil pump motor 11, which is electrically connected to the all-in-one controller 10; when the vehicle is in pure electric operation mode, the first clutch 2 and the second clutch 4 are both disconnected; when the vehicle is in extended range operation mode, the first clutch 2 is closed and the second clutch 4 is disconnected. The oil pump motor 11 provides driving force for the slewing mechanism 14, the variable amplitude mechanism 15, and the telescopic mechanism. The oil pump motor 11 can achieve very precise speed and position control through the motor controller to ensure the accuracy of each action; it can quickly respond to control signals, achieve rapid start and stop, and improve operating efficiency; the motor has high energy conversion efficiency, and can efficiently convert electrical energy into mechanical energy to reduce energy loss.

[0057] Furthermore, the all-in-one controller 10 is a controller that integrates a high-voltage matching box, a DC-DC converter, etc., and adopts a modular design, and different functional modules can be selected and combined according to actual needs; it has a high degree of integration and reduces intermediate links through centralized control, thereby improving the response speed and overall efficiency of the system.

[0058] Specifically, the operating machine also includes a first motor controller 21, a second motor controller 22 and a third motor controller 23. The first motor controller 21 is electrically connected to the generator 3, the second motor controller 22 is electrically connected to the drive motor 5, and the third motor controller 23 is electrically connected to the oil pump motor 11 controller. The motor controller is the core component in the motor control system and is responsible for managing and controlling the operation of the motor. It receives instructions to accurately control the operating parameters of the motor to ensure that the motor works in a predetermined manner.

[0059] It should be noted that the first motor controller can be referred to as MCU1, the second motor controller can be referred to as MCU2, and the third motor controller 23 can be referred to as MCU3.

[0060] It is understandable that in another embodiment, if Fig.11 and Fig.12 As shown, the driving part of the vehicle operation is a hydraulic oil pump 18, and the vehicle disembarking also includes a gearbox 6 and a power take-off 17 arranged on the vehicle disembarking body. The drive motor 5 is connected to the travel mechanism through the gearbox 6, and the gearbox 6 is connected to the hydraulic oil pump 18 through the power take-off 17; when the vehicle is in the pure electric operation mode, the first clutch 2 and the second clutch 4 are both disconnected; when the vehicle is in the extended range operation mode, the first clutch 2 and the second clutch 4 are both closed. The power take-off 17 is connected from the gearbox 6 of the disembarking vehicle, and the hydraulic oil pump 18 is used as the power source during the vehicle disembarking operation. The hydraulic system can provide strong driving force, precise control and high reliability, and is particularly suitable for applications that require large driving force, such as telescopic, variable amplitude and rotation of the crane arm.

[0061] In one embodiment, the energy storage device is a power battery 8, which has the advantages of long cycle life, environmental protection and sustainability, etc. It is understandable that the power battery 8 can also be replaced with other energy storage devices to convert other energy into electrical energy and store it in the energy storage device.

[0062] In one embodiment, the vehicle also includes an on-board charger, which is arranged on the vehicle body and electrically connected to the energy storage device; the vehicle also has a plug-in operation mode. When the vehicle is in the plug-in operation mode, the first clutch 2 and the second clutch 4 are both disconnected. When the working site is equipped with power supply conditions, after the charging gun on the external power supply 13 is inserted into the charging port of the on-board charger, the power of the external power supply 13 is transmitted to the oil pump motor 11, thereby driving the vehicle operation mechanism to operate. At the same time, the external power supply 13 can charge the energy storage device, making full use of time for charging, and can instantly replenish the energy of the battery.

[0063] It should be noted that the English abbreviation of on-board charger is OBC.

[0064] In one embodiment, the vehicle also has an energy recovery mode in which the driving motor 5 is reversed to drive the generator 3 to generate electricity during coasting or braking. When the operating machine is coasting or braking, the first clutch 2 is controlled to be disconnected, the second clutch 4 is controlled to be closed, and the driving motor 5 drives the generator 3 to generate electricity, thereby charging the energy storage device, thereby improving energy utilization efficiency by recovering and reusing the energy generated during braking or coasting.

[0065] Furthermore, the operating machinery includes but is not limited to cranes, pile drivers, mixers, etc. When the operating machinery is a crane, the on-board operating mechanism includes a slewing mechanism 14, a luffing mechanism 15, a winch mechanism 16 and a telescopic mechanism, etc. The slewing mechanism 14, the luffing mechanism 15, the winch mechanism 16 and the telescopic mechanism can all adopt structures in the prior art and will not be described in detail here.

[0066] The following takes the working machine as a crane as an example to further describe two embodiments of the crane of the present application in detail:

[0067] Embodiment 1

[0068] The crane's disembarkation adopts a hybrid system of a single engine combined with a power battery 8, and the onboard is powered by an oil pump motor 11. The whole vehicle adopts a hybrid structure of an engine 1 for disembarking, a generator 3, a dual clutch, a power battery 8, and an oil pump motor 11. The engine 1 for disembarking is connected to the generator 3 through a first clutch 2. When the engine 1 for disembarking is started, it can drive the generator 3 to generate electricity. The generator 3 can charge the power battery 8 while providing power for the drive motor 5; the vehicle charging is equipped with an AC-charged on-board charger, which can charge the power battery 8 through an external power supply device; the power battery 8 can be used as a power source for the onboard operation; at the same time, the vehicle can drive the oil pump motor 11 in the charging mode, and the operation of the oil pump motor 11 is controlled by the all-in-one controller 10, so as to provide power for the onboard rotation, amplitude change and hoisting and other actions to perform the onboard operation; the power source of the whole vehicle can be the engine 1 for disembarking or the power battery 8. After the energy is transmitted to the drive motor 5, it is transmitted to the drive axle 7 through the gearbox 6, thereby providing power for the driving of the whole vehicle.

[0069] It should be noted that Figures 2 to 6 , Figures 8 to 12 The gray-shaded parts in the figure represent working parts.

[0070] Combination Figures 2 to 6 Explain the working mode of getting on and off the crane:

[0071] When the vehicle enters the extended-range driving mode, the driving power source of the vehicle drive axle 7 is the engine. At this time, the first clutch 2 and the second clutch 4 are both closed, and the off-vehicle engine 1 enters the working state to generate electricity for the generator 3, and the generator 3 provides driving force for the drive motor 5. Figure 2 When the vehicle is in the extended range mode, the generator 3 can adjust the speed according to the specific driving conditions, the efficiency of the engine and the power of the power battery 8, so that the engine is in the best working state, so that the vehicle can provide sufficient power output with lower fuel consumption under high load driving conditions.

[0072] When the power of the power battery 8 is greater than a certain set threshold, the vehicle can shut down the engine to enter the pure electric driving mode. In this mode, the first clutch 2 is disconnected, the second clutch 4 is disconnected, and the power battery 8 is used as a power source to provide power to the drive motor 5 alone, and the drive motor 5 provides power for the entire vehicle. Figure 3 shown.

[0073] When the vehicle is parked, the vehicle can enter the parking charging mode, at which time the first clutch 2 is closed, the second clutch 4 is disconnected, and the engine drives the generator 3 to generate electricity, thereby charging the power battery 8. Figure 4 shown.

[0074] When the vehicle is operated and the power of the power battery 8 is greater than a certain set threshold, the vehicle enters the pure electric operation mode (such as Figure 5 As shown in the figure, the vehicle will determine whether it is necessary to start the generator 3 to enter the extended-range operation mode according to the power of the power battery 8 and the power required for the vehicle operation. When the power of the power battery 8 is consumed to the set threshold or the vehicle is performing high-power operation, the second clutch 4 is kept closed and the first clutch 2 is disconnected to enter the extended-range mode, and the engine drives the generator 3 to charge the power battery 8. Figure 6 shown.

[0075] The whole vehicle can be charged by an external power source. When the vehicle is charged, the first clutch 2 and the second clutch 4 are disconnected, and the oil pump motor 11 can be driven by the external power source to perform plug-in operation.

[0076] When the vehicle is coasting or braking, the braking mechanism of the vehicle will provide braking force to provide energy feedback to the drive motor 5, thereby achieving coasting energy recovery and braking energy recovery.

[0077] Embodiment 2

[0078] The crane's upper vehicle is connected to the power take-off 17 from the gearbox 6, and a hydraulic oil pump 18 is selected as the power source during the upper vehicle operation; the whole vehicle adopts a hybrid structure of an engine, a dual clutch, a drive motor 5, a hydraulic oil pump 18, and a power battery 8.

[0079] The hydraulic oil pump 18 uses a double plunger pump and a double gear pump. The double plunger pump only provides hydraulic power for the amplitude adjustment and telescopic circuits, so the double plunger pump displacement can be selected to be relatively small. One gear pump in the double gear pump provides power for the rotary hydraulic circuit, and the other gear pump in the double gear pump can provide hydraulic power for the outrigger circuit and the air conditioning and cooling system.

[0080] The getting-off engine 1 and the generator 3 are connected via the first clutch 2, and the getting-off engine 1 drives the generator 3 to work, to charge the power battery 8 or to provide power for the drive motor 5; at the same time, an external power supply can be connected, and the external power supply is equipped with an AC charging gun, and the charging gun charges the power battery 8 through the OBC; the drive motor 5 and the hydraulic oil pump 18 are connected to the power take-off 17 via the gearbox 6, and the drive motor 5 can be used to drive the hydraulic oil pump 18 to perform on-board operations in the charging mode; the whole vehicle can provide power for the drive motor 5 through the engine or the power battery 8, and the drive motor 5 transmits power to the drive axle 7 through the gearbox 6, thereby providing power for the whole vehicle to travel.

[0081] Combination Figures 8 to 12 Explain the working mode of getting on and off the crane:

[0082] When the driver selects the extended-range driving mode and enters the driving state, the first clutch 2 and the second clutch 4 are both closed, the engine 1 generates electricity for the generator 3, and the generator 3 provides power for the drive motor 5. Figure 8 shown.

[0083] When the vehicle stops and enters the parking power generation mode, the first clutch 2 is closed, the second clutch 4 is disconnected, and the off-vehicle engine 1 drives the generator 3 to generate electricity to charge the power battery 8. Fig.10 shown.

[0084] Under certain circumstances where there is sufficient power, the power battery 8 can also provide power for the drive motor 5 , and the power battery 8 and the engine together provide power for the vehicle.

[0085] During vehicle driving, the drive motor 5 can automatically adjust the torque output of the engine according to the vehicle driving conditions, the efficiency of the engine and the power of the power battery 8, so that the working point of the engine is always in the high-efficiency range.

[0086] When the power battery 8 has sufficient power and is above a certain set threshold, the driver can enter the pure electric driving mode while driving. At this time, the first clutch 2 and the second clutch 4 are disconnected, and the power battery 8 can independently provide power to the drive motor 5, and the drive motor 5 provides power for the whole vehicle to travel. Fig. 9 shown.

[0087] When the vehicle is operated and the power of the power battery 8 is greater than a certain threshold, the first clutch 2 is disconnected, the second clutch 4 is disconnected, and the vehicle can enter the pure electric operation mode. Fig.11 shown.

[0088] When the power of the power battery 8 is consumed below the set threshold during operation, the first clutch 2 is closed, the second clutch 4 is closed, and the extended-range operation mode is entered, and the engine generates electricity to provide power for the vehicle to operate. Fig.12 shown.

[0089] When the vehicle is in high-power limit operation or the power required for on-board operation exceeds the limit, the engine will start to replenish power for the power battery 8.

[0090] The whole vehicle can be charged by an external power source. When the vehicle is charged, the first clutch 2 is disconnected, the second clutch 4 is disconnected, and the vehicle can be driven by the drive motor 5 to perform plug-in operation by means of an external power source.

[0091] When the vehicle is coasting or braking, the drive system provides braking force and provides energy feedback to the drive motor 5, thereby achieving coasting energy recovery and braking energy recovery.

[0092] In the relevant technology, when pure electric vehicles are driving, the vehicle may have insufficient power under some extreme working conditions, and the vehicle cannot complete specific operations under some extreme working conditions, and is only suitable for stable working conditions under appropriate temperatures. For pure oil vehicles, the direct function of the engine will cause serious pollution to the atmosphere.

[0093] In the present embodiment, a hybrid power system combining an engine and a power battery 8 is adopted. The hybrid power vehicle model can be applied to a variety of operating scenarios, and can also switch to a pure electric mode to reduce emission pollution, ensuring that the vehicle can adapt to operating conditions under various conditions; while ensuring the driving force for getting off the crane and the power supply for getting on the vehicle, the hybrid / pure electric mode can be switched according to specific working conditions. In the hybrid power mode, the engine can be made to work under the optimal working condition with relatively low fuel consumption and less pollution. The engine can be turned off when working in urban areas to achieve zero emissions in suburban areas, which can meet the vehicle state switching requirements under different driving requirements. At the same time, the vehicle has low pollution and meets national vehicle standards.

[0094] Furthermore, the crane adopts a dual clutch, which can complete the switching of the vehicle's pure electric mode, extended-range mode and charging mode by controlling the engagement and disengagement of the clutch in different positions, thereby realizing the pure electric mode, extended-range mode, charging mode and energy recovery mode. On the premise of meeting the needs of new energy vehicles, it ensures the vehicle's operating ability under complex working conditions and improves the vehicle's adaptability in different environments.

[0095] Specifically, in the pure electric mode, the power battery 8 can be used to directly drive the entire vehicle for travel, or the power battery 8 can be used to drive the vehicle for operation, which improves the vehicle's power adaptability in certain special situations, saves fuel consumption, improves fuel utilization efficiency, and achieves the purpose of fuel saving; in the extended-range mode, the engine generates electricity to drive the entire vehicle for travel or operation, and the motor speed is adjusted to make the engine output more effective power, thereby controlling the engine to work in the high-efficiency area, thereby reducing energy consumption.

[0096] Furthermore, due to the rapid response and movement of the motor, it has faster acceleration than traditional fuel vehicles, and can provide the same smooth driving and fast acceleration response as pure electric vehicles; at the same time, the vehicle can be driven in pure electric mode to reduce exhaust emissions and achieve lower fuel consumption.

[0097] Furthermore, the vehicle-mounting operation uses a hydraulic oil pump 18 as a power source to achieve cost control.

[0098] According to an embodiment of the present invention, on the other hand, a hybrid power control method is provided for controlling the above hybrid power working machine. The hybrid power control method comprises the following steps:

[0099] Determine whether the vehicle is in a driving state; wherein, whether the operating machine is in a driving state can be determined by the depression depth of the accelerator pedal, the rotation speed of the operating machine or the position of the operating machine;

[0100] If the vehicle is in the parking state, the vehicle is controlled to enter the parking charging mode. At this time, the first and second clutches 4 are controlled to be closed and the second clutch 4 is disconnected, and the generator 3 is driven by the engine to generate electricity, thereby charging the energy storage device. The parking time is fully utilized to charge the energy storage device, which can avoid interruption of the construction progress due to charging, and improve the utilization rate of the equipment and the overall work efficiency;

[0101] If the vehicle is in driving state, it is determined whether the power of the energy storage device is greater than the set threshold;

[0102] When the power of the energy storage device is greater than the set threshold, the vehicle is controlled to enter the pure electric driving mode, at which time the first and second clutches 4 and the second clutch 4 are both disconnected, and the energy storage device provides power for the drive motor 5;

[0103] If the power of the energy storage device is not greater than the set threshold, the vehicle is controlled to enter the extended-range driving mode. At this time, the first and second clutches 4 and the second clutch 4 are controlled to be closed, and the generator 3 is driven by the engine to generate electricity. The generator 3 provides driving force for the drive motor 5, thereby increasing the mileage of the operating machinery and significantly extending the vehicle's endurance.

[0104] The above control method realizes the pure electric mode, extended-range mode and charging mode of the vehicle. In the pure electric mode, the vehicle can be directly driven by the power battery 8 to drive the whole vehicle, which improves the adaptability of the vehicle under certain special working conditions, improves the fuel utilization efficiency and achieves the purpose of fuel saving. In the extended-range mode, the engine drives the generator 3 to supply power to the drive motor 5 to drive the whole vehicle. The speed of the drive motor 5 is adjusted to make the engine output more effective power, thereby reducing energy consumption.

[0105] In one embodiment, after getting off the vehicle and entering the extended-range driving mode, the hybrid power control method further includes:

[0106] The rotation speed of the generator 3 is adjusted according to the driving condition of the vehicle, the current efficiency of the engine and the power of the energy storage device.

[0107] By adjusting the rotation speed of the generator 3, the engine is in the best working state, so that the vehicle can provide sufficient power output with lower fuel consumption under high-load driving conditions.

[0108] Furthermore, driving conditions include starting, accelerating, decelerating, climbing, etc., and corresponding sensors are set to detect the vehicle speed, vehicle acceleration, accelerator pedal depth, etc., and then the driving conditions are judged based on the vehicle speed, vehicle acceleration, accelerator pedal depth, etc.

[0109] Specifically, the efficiency of the engine is determined based on the engine speed and load in the pre-stored efficiency curve, and the engine speed and load can be detected at this time. It is understandable that the efficiency of the engine can also be calculated based on the current driving conditions and the data detected by the corresponding sensor.

[0110] Furthermore, the rotation speed of the generator 3 is adjusted in real time by combining the driving condition of the vehicle, the current efficiency of the engine and the power of the energy storage device with a control algorithm to ensure that the vehicle moves in the best state.

[0111] It should be noted that the control algorithm can be an algorithm in the prior art, which will not be described in detail here.

[0112] In one embodiment, the hybrid power control method further includes:

[0113] When the vehicle is in operation, the operation mode of the vehicle is controlled according to the power of the energy storage device and the operation power required by the vehicle.

[0114] According to the power of the energy storage device and the operation requirements, the operation mode is dynamically adjusted to ensure that the machine can perform at its best under different working conditions. It can also avoid excessive discharge of the battery, thereby reducing damage to the battery and extending the battery life.

[0115] Furthermore, the operation mode of the vehicle is controlled according to the power of the energy storage device and the operation demand of the vehicle, including:

[0116] When the power of the energy storage device is greater than the set threshold and greater than the power corresponding to the required power of the vehicle operation, the vehicle is controlled to enter the pure electric operation mode, at which time the first and second clutches 4 and the second clutch 4 are both disconnected, and the energy storage device provides power for the vehicle operation drive;

[0117] When the power of the energy storage device is less than the set threshold or the power of the energy storage device is less than the power corresponding to the operating power requirement of the vehicle, the vehicle is controlled to enter the extended-range operating mode. At this time, the first and second clutches 4 are controlled to close, so that the vehicle enters the extended-range operating mode, and the engine drives the generator 3 to generate electricity. The generator 3 provides power for the operating parts on the vehicle, thereby extending the operating time of the operating machinery, which can significantly extend the operating capacity of the vehicle.

[0118] It should be noted that the required power of the vehicle operation is obtained through the voltage and current of the oil pump motor 11, and the remaining power of the energy storage device can be detected by voltage method, current method, impedance method, etc.

[0119] In one embodiment, the hybrid power control method further includes: when the on-board charger of the vehicle is connected to the external power source 13, the vehicle is controlled to be in the plug-in operation mode. When the operating machine meets the plug-in operation environment, after the charging gun on the external power source 13 is inserted into the charging port of the on-board charger, the power of the external power source 13 is transmitted to the oil pump motor 11, thereby driving the vehicle operating mechanism to operate. At the same time, the external power source 13 can charge the energy storage device, making full use of the time for charging, and can instantly replenish the energy of the battery.

[0120] In one embodiment, the hybrid control method also includes: when the vehicle is coasting or braking, controlling the vehicle to enter an energy recovery mode, at this time controlling the first and second clutches 4 to be disconnected, controlling the second clutch 4 to be closed, driving the motor 5 to drive the generator 3 to generate electricity, and then charging the energy storage device, thereby improving energy utilization efficiency by recovering and reusing the energy generated during braking or coasting.

[0121] 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 hybrid working machine, characterized in that: Including getting off the vehicle, the getting off the vehicle includes: Get off the vehicle; A power system is arranged on the vehicle body, the power system comprising a vehicle engine (1), a first clutch (2), a generator (3), a second clutch (4), a drive motor (5), an energy storage device, a battery management system (9) and an all-in-one controller (10), the vehicle engine (1), the first clutch (2), the generator (3), the second clutch (4) and the drive motor (5) are connected in sequence, the energy storage device and the generator (3) are both electrically connected to the battery management system (9), and the all-in-one controller (10) is electrically connected to the drive motor (5) and the battery management system (9); A walking mechanism connected to the driving motor (5); Wherein, the vehicle disembarking has an extended-range driving mode, a pure electric driving mode and a parking charging mode; When the vehicle is in the extended-range driving mode, the first clutch (2) and the second clutch (4) are both closed; When the vehicle is in the pure electric driving mode, the first clutch (2) and the second clutch (4) are both disconnected; When the vehicle is in the parking charging mode, the first clutch (2) is closed and the second clutch (4) is opened.

2. The hybrid working machine according to claim 1, characterized in that: The hybrid working machine further comprises an upper vehicle, and the upper vehicle comprises: An upper vehicle body is rotatably arranged on the lower vehicle body; An on-board operating drive member is arranged on the on-board body, and the energy storage device or the engine provides power for the operating drive member; A vehicle-mounting operation mechanism connected to the vehicle-mounting operation driving member; The vehicle has a pure electric operation mode and an extended range operation mode; When the upper vehicle is in the pure electric operation mode, the energy storage device provides power for the operation drive member; When the upper vehicle is in the extended-range operation mode, the engine provides power to the operation drive component.

3. The hybrid working machine according to claim 2, characterized in that: The vehicle operation drive member is an oil pump motor (11), and the oil pump motor (11) is electrically connected to the all-in-one controller (10); when the vehicle is in the pure electric operation mode, the first clutch (2) and the second clutch (4) are both disconnected; when the vehicle is in the extended range operation mode, the first clutch (2) is closed and the second clutch (4) is disconnected; Alternatively, the upper vehicle operation drive component is a hydraulic oil pump (18), the lower vehicle further comprises a gearbox (6) and a power take-off (17) arranged on the lower vehicle body, the drive motor (5) is connected to the walking mechanism via the gearbox (6), and the gearbox (6) is connected to the hydraulic oil pump (18) via the power take-off (17); when the upper vehicle is in the pure electric operation mode, the first clutch (2) and the second clutch (4) are both disconnected; when the upper vehicle is in the extended range operation mode, the first clutch (2) and the second clutch (4) are both closed.

4. The hybrid working machine according to claim 2, characterized in that: The lower vehicle further comprises an on-board charger, which is arranged on the lower vehicle body and is electrically connected to the energy storage device; the upper vehicle further has a plug-in operation mode, and when the upper vehicle is in the plug-in operation mode, the first clutch (2) and the second clutch (4) are both disconnected.

5. The hybrid working machine according to any one of claims 1 to 4, characterized in that: The vehicle also has an energy recovery mode in which the drive motor (5) is reversed to drive the generator (3) to generate electricity during coasting or braking.

6. A hybrid power control method, characterized in that: Used to control the hybrid working machine according to any one of claims 1 to 5, the hybrid control method comprises the following steps: Determine whether the vehicle is in a moving state; If the vehicle is in a parking state, controlling the vehicle to enter a parking charging mode; If the vehicle is in a driving state, it is determined whether the power of the energy storage device is greater than a set threshold; When the power of the energy storage device is greater than a set threshold, the vehicle is controlled to enter a pure electric driving mode; If the power of the energy storage device is not greater than the set threshold, the vehicle is controlled to enter the extended-range driving mode.

7. The hybrid power control method according to claim 6, characterized in that: After getting off the vehicle and entering the extended-range driving mode, the hybrid power control method further includes: The rotation speed of the generator is adjusted according to the driving condition of the vehicle, the current efficiency of the engine and the power of the energy storage device.

8. The hybrid power control method according to claim 6 or 7, characterized in that: The hybrid power control method further includes: When the vehicle is in operation, the operation mode of the vehicle is controlled according to the power of the energy storage device and the operation power requirement of the vehicle.

9. The hybrid power control method according to claim 8, characterized in that: Controlling the operation mode of the vehicle according to the power of the energy storage device and the operation power requirement of the vehicle includes: When the power of the energy storage device is greater than a set threshold and greater than the power corresponding to the operating power requirement of the vehicle, the vehicle is controlled to enter a pure electric operating mode; When the power of the energy storage device is less than the set threshold or the power of the energy storage device is less than the power corresponding to the operating power requirement of the vehicle, the vehicle is controlled to enter the extended-range operation mode.

10. The hybrid power control method according to claim 8, characterized in that: The hybrid power control method further includes: When the onboard charger of the off-board vehicle is connected to an external power source (13), the on-board vehicle is controlled to be in a plug-in operation mode; When the lower vehicle is coasting or braking, the lower vehicle is controlled to enter an energy recovery mode.

Images