Crane

Abstract

The invention relates to the technical field of operation machinery, and discloses a crane. The crane comprises a traveling driving system which comprises a driving motor and a traveling mechanism, and the driving motor is connected with the traveling mechanism; the fuel cell system comprises a cell stack, a hydrogen supply mechanism and an air supply mechanism, and the cell stack is connected with the hydrogen supply mechanism and the air supply mechanism; the operation system comprises a winch motor, a winch box, a rotation assembly, a rotation motor, an oil pump motor and an operation hydraulic assembly, the winch motor is connected with the winch box, the rotation motor is connected with the rotation assembly, and the oil pump motor is connected with the operation hydraulic assembly; and the control system is electrically connected with the traveling driving system, the fuel cell system and the operation system. The fuel cell system serves as a power source to provide power for the crane, water and heat are mainly generated in the operation process of a fuel cell, harmful tail gas emission is avoided, fuel can be rapidly supplemented through a hydrogen refueling station, and zero emission, high efficiency and high energy supplementing speed are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of operating machinery, and in particular to a crane. Background Art

[0002] Cranes and other operating machinery are an indispensable part of engineering operations. Traditional operating machinery is still highly dependent on fossil fuels. For example, traditional cranes still have problems with high energy consumption and high pollution emissions when traveling or operating. Most of their energy is supplied by engines, and 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.

[0003] 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 models and hybrid models. However, pure electric models are prone to low battery power during driving or operation, which may lead to problems such as short cruising range and long recharging time. Hybrid models still have exhaust pollution and noise pollution, and their efficiency and economy are not high. Summary of the invention

[0004] In view of this, the present invention provides a crane to solve the problems of short cruising range and long charging time of pure electric vehicles.

[0005] The present invention provides a crane, comprising: a travel drive system, comprising a drive motor and a traveling mechanism, the drive motor is connected to the traveling mechanism to drive the traveling mechanism to travel; a fuel cell system, comprising a battery stack, a hydrogen supply mechanism, and an air supply mechanism, the battery stack is connected to the hydrogen supply mechanism and the air supply mechanism; an operating system, comprising a hoisting motor, a hoisting box, a slewing assembly, a slewing motor, an oil pump motor, and an operating hydraulic assembly, the hoisting motor is connected to the hoisting box, the slewing motor is connected to the slewing assembly, and the oil pump motor is connected to the operating hydraulic assembly; a control system, electrically connected to the travel drive system, the fuel cell system, and the operating system, the control system being used to control the fuel cell system to supply power to the travel drive system and the operating system.

[0006] Beneficial effects: The hydrogen supply mechanism and the air supply mechanism provide hydrogen and oxygen for the battery stack. Hydrogen and oxygen react electrochemically under the action of the catalyst in the battery stack to generate electricity. The electricity generated by the battery stack provides power for the drive motor, hoisting motor, slewing motor and oil pump motor, and then the drive motor drives the walking mechanism to travel, the hoisting motor can drive the hoist box to move, the slewing motor can drive the slewing assembly to move, and the oil pump motor drives the operating hydraulic assembly to move. The fuel cell system is used as a power source to provide power to the crane. During operation, the fuel cell mainly produces water and heat, and will not produce harmful exhaust emissions. It can be quickly refueled at a hydrogen refueling station to achieve zero emissions, high efficiency, and fast refueling speed, effectively solving the problems of short cruising range and long refueling time of pure electric vehicles and exhaust pollution and noise pollution of hybrid vehicles.

[0007] In an optional embodiment, the operating hydraulic component includes a hydraulic oil tank, an operating oil pump, a boom cylinder and a telescopic oil cylinder. The operating oil pump is connected to the oil pump motor, the operating oil pump is connected to the hydraulic oil tank, the operating oil pump is connected to the boom cylinder and the telescopic cylinder. The operating system also includes a boom component and a telescopic boom. The boom component is connected to the boom cylinder, and the telescopic boom is connected to the telescopic cylinder.

[0008] Beneficial effects: The oil pump motor drives the operating oil pump, which provides hydraulic oil of different pressures and flows to the luffing cylinder and the telescopic cylinder. Due to the incompressibility of the hydraulic oil, the luffing cylinder and the telescopic cylinder can provide smooth and impact-free movement. In addition, the luffing cylinder and the telescopic cylinder themselves have a simple structure, small size and light weight, and are easy to install in a small and limited space.

[0009] In an optional embodiment, the control system includes a vehicle controller, the fuel cell system also includes a fuel cell controller, the operating system also includes a boarding controller, and the travel drive mechanism also includes an getting-off controller. The vehicle controller is electrically connected to the fuel cell controller, the boarding controller, and the getting-off controller. The boarding controller is electrically connected to the winch motor, the slewing motor, and the oil pump motor. The getting-off controller is electrically connected to the drive motor.

[0010] Beneficial effects: Through the coordinated work of the vehicle controller, the onboard controller, the offboard controller and the fuel cell controller, the performance, efficiency and safety of the vehicle can be significantly improved.

[0011] In an optional implementation, both the boarding control and the getting off control are all-in-one controllers.

[0012] Beneficial effects: By concentrating the functions of multiple controllers in one controller, the amount of hardware required is reduced, thereby reducing the complexity of the system and the difficulty of installation; the number of connecting cables between each independent controller is reduced, making the wiring simpler and reducing the risk of wiring errors.

[0013] In an optional embodiment, the crane also includes a thermal management system and a cab, the thermal management system includes a battery cooling system and a heater, the battery cooling system includes a circulation pump and a heat exchanger, the heat exchanger is arranged in the cab, and the battery stack, the circulation pump, the heater, and the heat exchanger form a water circulation loop.

[0014] Beneficial effects: After the heat generated by the battery stack is transferred to the cooling water, the heat of the cooling water is exchanged through the heat exchanger to heat the cab. If the heating demand of the cab is relatively large, the cooling water flowing out of the battery stack can be further heated by the heater and then flowed into the heat exchanger to improve the heating effect. The cooling water after heat exchange flows into the battery stack to continue cooling the battery stack. The heat generated by the battery stack reaction is used as the heat source of the heater, thereby providing heat for the heating of the cab.

[0015] In an optional embodiment, the thermal management system further includes an air-conditioning system, which includes an air-conditioning compressor, a condenser and an evaporator, and the compressor, the condenser and the evaporator form a refrigerant circulation loop.

[0016] Beneficial effects: The air conditioning system can be used to cool or heat the cab, improving the operator's working environment and comfort. A comfortable working environment helps reduce operator fatigue, especially during long hours of operation, which can significantly improve work efficiency and accuracy.

[0017] In an optional embodiment, two driving cabs are provided and two heat exchangers are provided, and the two driving cabs and the two heat exchangers are arranged in a one-to-one correspondence.

[0018] Beneficial effects: One cab is used for getting off the vehicle when driving, and the other cab is used for getting on the vehicle when working. The operator can choose the most suitable cab according to the operation requirements, which improves the flexibility of operation. A heat exchanger is set in each cab to improve the working environment and comfort of the operator in each cab.

[0019] In an optional embodiment, the travel drive mechanism also includes an electric air compressor and a brake air storage tank, the electric air compressor is electrically connected to the get-off controller, and the electric air compressor is connected to the brake air storage tank.

[0020] Beneficial effect: Fast and reliable gear shifting is achieved through the electric air compressor and brake air storage tank.

[0021] In an optional implementation, the travel drive mechanism further includes an electric steering oil pump and a steering gear, the electric steering oil pump is electrically connected to the vehicle getting off controller, the electric steering oil pump is connected to the steering gear, and the steering gear is used to control the steering of the travel mechanism.

[0022] Beneficial effects: When the driver turns the steering wheel, the electric steering oil pump provides appropriate hydraulic assistance based on the information fed back by the sensor, and transmits the assistance to the wheels through the steering gear, making steering easier and more precise.

[0023] In an optional embodiment, the fuel cell system further includes a boost converter, the crane further includes a battery distribution unit, and the battery stack is electrically connected to the onboard controller and the offboard controller via the boost converter and the battery distribution unit.

[0024] Beneficial effects: The efficiency of the boost converter is usually high, which can effectively reduce energy losses. The BDU manages and distributes the power from the DCF to ensure safe and efficient power supply to various loads in the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 A structural block diagram of a crane according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 The structural block diagram of the fuel cell system and vehicle controller shown;

[0028] Figure 3 for Figure 1 The structural block diagram of the operating system shown;

[0029] Figure 4 for Figure 1 The structural block diagram of the driving brake system, PDU, and power battery shown;

[0030] Figure 5 for Figure 1 The structural block diagram of the thermal management system is shown.

[0031] Description of reference numerals:

[0032] 1. Driving system; 101. Driving motor; 102. Getting off controller; 103. Electric air compressor; 104. Brake air reservoir; 105. Electric steering oil pump; 106. Steering gear; 107. Transmission;

[0033] 2. Fuel cell system; 201. Battery stack; 203. Fuel cell controller; 204. Boost converter; 205. Hydrogen storage bottle; 206. Hydrogen sensor; 207. Hydrogen storage controller; 208. Air filter; 209. Air compressor;

[0034] 3. Operating system; 301. Hoisting motor; 302. Rotating motor; 303. Oil pump motor; 304. Onboard controller; 305. Operating oil pump; 306. Hoisting box;

[0035] 4. Vehicle controller;

[0036] 5. Thermal management system; 501. PTC heater for getting on the vehicle; 502. PTC heater for getting off the vehicle; 503. Air conditioning compressor for getting on the vehicle; 504. Air conditioning compressor for getting off the vehicle;

[0037] 6. Battery distribution unit;

[0038] 7. Power battery;

[0039] 8. Battery;

[0040] 9. Hydraulic oil tank. 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 5 , describing an embodiment of the present invention.

[0043] According to an embodiment of the present invention, a crane is provided, comprising: a travel drive system 1, a fuel cell system 2, an operating system 3 and a control system. The travel drive system 1 comprises a drive motor 101 and a traveling mechanism, wherein the drive motor 101 is connected to the traveling mechanism to drive the traveling mechanism to travel; the fuel cell system 2 comprises a battery stack 201, a hydrogen supply mechanism, and an air supply mechanism, wherein the battery stack 201 is connected to the hydrogen supply mechanism and the air supply mechanism; the operating system 3 comprises a hoisting motor 301, a hoisting box 306, a slewing assembly, a slewing motor 302, an oil pump motor 303, and an operating hydraulic assembly, wherein the hoisting motor 301 is connected to the hoisting box 306, the slewing motor 302 is connected to the slewing assembly, and the oil pump motor 303 is connected to the operating hydraulic assembly; the control system is electrically connected to the travel drive system 1, the fuel cell system 2, and the operating system 3, and the control system is used to control the fuel cell system 2 to supply power to the travel drive system 1 and the operating system 3.

[0044] In the crane using this embodiment, the hydrogen supply mechanism and the air supply mechanism provide hydrogen and oxygen to the battery stack 201. The hydrogen and oxygen react electrochemically under the action of the catalyst in the battery stack 201 to generate electrical energy. The electrical energy generated by the battery stack 201 provides power for the drive motor 101, the hoisting motor 301, the slewing motor 302 and the oil pump motor 303. The drive motor 101 drives the walking mechanism to travel, the hoisting motor 301 can drive the hoist box 306 to move, the slewing motor 302 can drive the slewing assembly to move, and the oil pump motor 303 drives the working hydraulic assembly to move. The fuel cell system 2 is used as a power source to provide power to the crane. The fuel cell mainly produces water and heat during operation, and no harmful exhaust emissions are generated. The fuel cell can be quickly refueled through a hydrogen refueling station, achieving zero emissions, high efficiency, and fast energy replenishment speed, effectively solving the problems of short cruising range and long energy replenishment time of pure electric vehicles and exhaust pollution and noise pollution of hybrid vehicles.

[0045] In one embodiment, Figure 1 and Figure 3 As shown, the operating hydraulic assembly includes a hydraulic oil tank 9, an operating oil pump 305, a luffing oil cylinder and a telescopic oil cylinder. The operating oil pump 305 is connected to the oil pump motor 303, the operating oil pump 305 is connected to the hydraulic oil tank 9, the operating oil pump 305 is connected to the luffing oil cylinder and the telescopic oil cylinder. The operating system 3 also includes a luffing assembly and a telescopic boom. The luffing assembly is connected to the luffing oil cylinder, and the telescopic boom is connected to the telescopic oil cylinder. The oil pump motor 303 drives the operating oil pump 305, and the operating oil pump 305 provides hydraulic oil of different pressures and flows to the luffing oil cylinder and the telescopic oil cylinder. Due to the incompressibility of the hydraulic oil, the luffing oil cylinder and the telescopic oil cylinder can provide smooth and impact-free movement. The luffing oil cylinder and the telescopic oil cylinder themselves have simple structures, small volumes, and light weights, and are easy to install in small and limited spaces.

[0046] Furthermore, the operating system 3 converts the energy output by the fuel cell system 2 into mechanical energy to move the heavy object vertically, horizontally and in different directions.

[0047] It should be noted that the hoist box 306, the slewing assembly, the luffing assembly and the telescopic boom can all adopt structures in the prior art, and will not be described in detail in this step.

[0048] In one embodiment, Figures 1 to 4As shown, the control system includes a vehicle controller 4, the fuel cell system 2 also includes a fuel cell controller 203, the operation system 3 also includes a vehicle controller 304, and the driving mechanism also includes a vehicle controller 102. The vehicle controller 4 is electrically connected to the fuel cell controller 203, the vehicle controller 304, and the vehicle controller 102. The vehicle controller 304 is electrically connected to the hoisting motor 301, the rotary motor 302, and the oil pump motor 303. The vehicle controller 102 is electrically connected to the drive motor 101. The vehicle controller 4 is responsible for integrating and coordinating the work of each system to ensure the efficiency and stability of the entire vehicle operation; the vehicle controller 304 can finely control the upper actuator to ensure the accuracy and reliability of the action, and the vehicle controller 102 can adjust the chassis parameters in real time according to the road conditions and load changes to improve the vehicle's passability and comfort; through the coordinated work of the vehicle controller 4, the vehicle controller 304, the vehicle controller 102, and the fuel cell controller 203, the performance, efficiency, and safety of the vehicle can be significantly improved.

[0049] Furthermore, the vehicle control system makes decisions based on the driver's operating intentions and the real-time status of each system through calculation and analysis, reasonably distributes kinetic energy, controls the crane's acceleration and deceleration, energy recovery, and fault detection, so that the crane operates in the best state.

[0050] It should be noted that the control logic adopted by the vehicle control system can be the control logic in the prior art, which will not be described in detail here.

[0051] In one embodiment, both the boarding controller and the disembarking controller 102 are all-in-one controllers. By concentrating the functions of multiple controllers in one controller, the required hardware quantity is reduced, thereby reducing the complexity and installation difficulty of the system; the number of connecting cables between each independent controller is reduced, making the wiring more concise and reducing the risk of wiring errors.

[0052] In one embodiment, Figure 1 and Figure 5 As shown, the crane also includes a thermal management system 5 and a cab. The thermal management system 5 includes a battery cooling system and a heater. The battery cooling system includes a circulation pump and a heat exchanger. The heat exchanger is arranged in the cab. The battery stack 201, the circulation pump, the heater, and the heat exchanger form a water circulation loop. After the heat generated by the battery stack 201 is transferred to the cooling water, the heat of the cooling water is exchanged through the heat exchanger to heat the cab. If the heating demand of the cab is relatively large, the cooling water flowing out of the battery stack 201 can also be further heated by the heater and then flowed into the heat exchanger to improve the heating effect. The cooling water after heat exchange flows into the battery stack 201 to continue cooling the battery stack 201. The heat generated after the reaction of the battery stack 201 is used as the heat source of the heater, thereby providing heat for the heating of the cab.

[0053] Furthermore, the heater is a PTC heater, and the core component of the PTC heater is a PTC thermistor, which is a special ceramic material whose resistance value changes significantly with temperature. Specifically, when the temperature is below a certain critical point, the resistance of the PTC material is low; when the temperature reaches or exceeds this critical point, the resistance increases rapidly, thereby limiting the further increase of the current and preventing overheating. The PTC heater has the advantages of high safety, energy saving and high efficiency, and long service life.

[0054] Specifically, the thermal management system 5 automatically adjusts the cooling intensity according to different working conditions and environmental conditions of the crane to ensure that the cooled object operates within the optimal temperature range, thereby optimizing the environmental performance and energy-saving effect of the crane, while improving the operating safety and driving comfort of the crane.

[0055] In one embodiment, the thermal management system 5 further includes an air conditioning system, which includes an air conditioning compressor, a condenser and an evaporator, and the compressor, the condenser and the evaporator form a refrigerant circulation loop. The air conditioning system cools or heats the cab to improve the operator's working environment and comfort. A comfortable working environment helps reduce the operator's fatigue, especially in the case of long-term operation, which can significantly improve work efficiency and accuracy.

[0056] In one embodiment, two cabs are provided, and two heat exchangers are provided, and the two cabs and the two heat exchangers are provided in a one-to-one correspondence. One cab is a cab for getting off the vehicle when driving, and the other cab is a cab for getting on the vehicle when working. The operator can choose the most suitable cab according to the working requirements, thereby improving the flexibility of operation. A heat exchanger is provided in each cab to improve the working environment and comfort of the operator in each cab.

[0057] Furthermore, if Figure 1 and Figure 5 As shown, two heaters are also provided, namely, a PTC heater 501 for getting on the vehicle and a PTC heater 502 for getting off the vehicle. Two air-conditioning compressors are also provided, namely, a PTC compressor 503 for getting on the vehicle and a PTC compressor 504 for getting off the vehicle. In this case, two evaporators are provided, and one or two condensers can be provided. The PTC heater 501 for getting on the vehicle and the air-conditioning compressor 503 for getting on the vehicle are electrically connected to the controller 304 for getting on the vehicle, and the PTC heater 502 for getting off the vehicle and the air-conditioning compressor 504 for getting off the vehicle are electrically connected to the controller 102 for getting off the vehicle.

[0058] In one embodiment, the traveling mechanism is a wheel-type traveling mechanism or a crawler-type traveling mechanism, and the driving motor 101 is connected to the wheel-type traveling mechanism or the crawler-type traveling mechanism through the transmission 107. The wheel-type traveling mechanism or the crawler-type traveling mechanism can adopt the mechanism in the prior art, which will not be described in detail here.

[0059] In one embodiment, Figure 4 As shown, the travel drive mechanism also includes an electric air compressor 103 and a brake air tank 104. The electric air compressor 103 is electrically connected to the get-off controller 102, and the electric air compressor 103 is connected to the brake air tank. The electric air compressor 103 is used to generate compressed air to provide a power source for the pneumatic system. The brake air tank 104 is used to store compressed air to ensure that the pneumatic system has sufficient pressure when needed. The electric air compressor 103 and the brake air tank 104 achieve fast and reliable gear shifting.

[0060] Furthermore, the driving motor 101 is connected to the transmission 107, and the travel driving mechanism also includes an air filter, a dryer, and a shift actuator. The air filter, the electric air compressor 103, the dryer, the brake air storage tank 104, and the shift actuator are connected in sequence, and the shift actuator is connected to the transmission 107. The air filter is used to filter the air entering the pneumatic system, remove dust, impurities and moisture therein, and ensure that the air entering the system is clean. The dryer is used to further remove moisture from the compressed air to prevent moisture from entering the pneumatic system and avoid problems such as rust and freezing. The shift actuator is a cylinder, etc., which pushes the shift lever or shift fork of the transmission 107 through the cylinder to achieve gear switching.

[0061] In one embodiment, Figure 4 As shown, the travel drive mechanism further includes an electric steering oil pump 105 and a steering gear 106. The electric steering oil pump 105 is electrically connected to the vehicle exit controller 102. The electric steering oil pump 105 is connected to the steering gear 106. The steering gear 106 is used to control the steering of the travel mechanism. When the driver turns the steering wheel, the electric steering oil pump 105 provides appropriate hydraulic power according to the information fed back by the sensor, and transmits the power to the wheels through the steering gear 106, making steering easier and more precise.

[0062] Furthermore, the oil inlet of the electric steering oil pump 105 is connected to the hydraulic oil tank 9, and the hydraulic oil tank 9, the electric steering oil pump 105, the operating oil pump 305, the telescopic cylinder, the luffing cylinder and the steering gear 106 form a hydraulic system. The output of external energy is converted into hydraulic energy through the electric steering oil pump 105 and the operating oil pump 305, thereby providing power for the telescopic, luffing and steering movements of the crane.

[0063] Specifically, the driving system 1 converts the energy output by the fuel cell system 2 into mechanical energy, propels the vehicle to overcome various rolling resistances, air resistances, acceleration resistances and climbing resistances, and converts kinetic energy into electrical energy during braking and feeds it back to the energy storage system.

[0064] In one embodiment, Figure 1 and Figure 2As shown, the fuel cell system 2 also includes a boost converter 204, and the crane also includes a battery distribution unit 6. The battery stack 201 is electrically connected to the onboard controller 304 and the offboard controller 102 through the boost converter 204 and the battery distribution unit 6. The oxygen and hydrogen in the air undergo an electrochemical reaction under the action of the catalyst in the battery stack 201 to generate electrical energy, which is then transported to the boost converter 204 (English abbreviation: DCF) for voltage boosting. After the DCF boosts and reduces the current, it is then transported to the PDU (high-voltage distribution unit), which distributes the electrical energy to related components such as motors to provide power for them. The efficiency of the boost converter is usually very high, which can effectively reduce energy loss. The BDU manages and distributes the electricity from the DCF to ensure safe and efficient power supply for various loads of the vehicle.

[0065] Furthermore, the hydrogen supply mechanism includes a hydrogen storage bottle 205, a hydrogen sensor 206 and a hydrogen storage controller 207. The hydrogen storage bottle 205 is connected to the battery stack 201, and the hydrogen storage controller 207 is electrically connected to the vehicle controller 4 and the hydrogen sensor 206. The hydrogen supply mechanism provides a hydrogen source for the fuel cell vehicle to ensure the safe, reliable and stable operation of the fuel cell vehicle. The hydrogen sensor 206 is used to detect the hydrogen concentration of the hydrogen supply mechanism to ensure that hydrogen leakage can be detected in time. The hydrogen sensor 206 can also be used to monitor the hydrogen concentration in the vehicle's surrounding environment to prevent external leakage from affecting safety. The hydrogen storage controller 207 is responsible for monitoring and controlling the pressure in the hydrogen storage bottle 205 to ensure that hydrogen is stored and supplied within a safe range. The hydrogen supply pressure can be dynamically adjusted according to the needs of the vehicle to optimize the working efficiency of the fuel cell. The hydrogen sensor 206 continuously monitors the hydrogen concentration in the hydrogen storage bottle 205 and the hydrogen supply pipeline. The hydrogen storage controller 207 adjusts the hydrogen supply pressure and flow rate according to the information fed back by the sensor to ensure the stable operation of the system.

[0066] Furthermore, the air supply mechanism includes an air filter 208 and an air compressor 209 connected to each other. The air compressor 209 is connected to the battery stack 201. The air filter 208 filters dust, particulate matter and other pollutants contained in the air before entering the air compressor 209 to protect the internal components of the air compressor 209 from wear and tear and ensure the quality of the output air. The air compressor 209 compresses the inhaled air to a higher pressure to provide the required high-pressure gas for subsequent use.

[0067] It should be noted that the travel drive system 1 and the air supply mechanism may share an air compressor 209 , or may not share the air compressor 209 .

[0068] In one embodiment, Figure 1As shown, the crane also includes a power battery 7 and a storage battery 8. The power battery 7 is electrically connected to the PDU, and the storage battery 8 is electrically connected to the vehicle controller 4. The excess electric energy generated by the fuel cell system 2 can be stored in the power battery 7 to avoid energy waste. The storage battery 8 provides power for the low-voltage electrical system of the vehicle to ensure the normal operation of the low-voltage electrical system.

[0069] 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 crane, characterized in that: include: A travel drive system (1) comprises a drive motor (101) and a travel mechanism, wherein the drive motor (101) is connected to the travel mechanism to drive the travel mechanism to travel; A fuel cell system (2), comprising a battery stack (201), a hydrogen supply mechanism, and an air supply mechanism, wherein the battery stack (201) is connected to the hydrogen supply mechanism and the air supply mechanism; The operating system (3) comprises a hoisting motor (301), a hoisting box, a slewing assembly, a slewing motor (302), an oil pump motor (303), and an operating hydraulic assembly, wherein the hoisting motor (301) is connected to the hoisting box, the slewing motor (302) is connected to the slewing assembly, and the oil pump motor (303) is connected to the operating hydraulic assembly; A control system is electrically connected to the driving system (1), the fuel cell system (2), and the operating system (3), and the control system is used to control the fuel cell system (2) to supply power to the driving system (1) and the operating system (3).

2. The crane according to claim 1, characterized in that: The operating hydraulic assembly comprises a hydraulic oil tank, an operating oil pump, a boom cylinder and a telescopic oil cylinder, the operating oil pump is connected to the oil pump motor (303), the operating oil pump is connected to the hydraulic oil tank, the operating oil pump is connected to the boom cylinder and the telescopic oil cylinder, the operating system (3) also comprises a boom assembly and a telescopic boom, the boom assembly is connected to the boom cylinder, and the telescopic boom is connected to the telescopic cylinder.

3. The crane according to claim 1, characterized in that: The control system includes a vehicle controller (4), the fuel cell system (2) also includes a fuel cell controller (203), the operating system (3) also includes a boarding controller (304), and the travel drive mechanism also includes a disembarking controller (102). The vehicle controller (4) is electrically connected to the fuel cell controller (203), the boarding controller (304), and the disembarking controller (102). The boarding controller (304) is electrically connected to the hoisting motor (301), the rotary motor (302), and the oil pump motor (303). The disembarking controller (102) is electrically connected to the drive motor (101).

4. The crane according to claim 3, characterized in that: The boarding control and the getting off controller (102) are all-in-one controllers.

5. The crane according to any one of claims 1 to 4, characterized in that: The crane further comprises a thermal management system (5) and a cab, the thermal management system (5) comprising a battery cooling system and a heater, the battery cooling system comprising a circulation pump and a heat exchanger, the heat exchanger being arranged in the cab, and the battery stack (201), the circulation pump, the heater and the heat exchanger forming a water circulation loop.

6. The crane according to claim 5, characterized in that: The thermal management system (5) also includes an air conditioning system, which includes an air conditioning compressor, a condenser and an evaporator, wherein the compressor, the condenser and the evaporator form a refrigerant circulation loop.

7. The crane according to claim 5, characterized in that: There are two driving cabs and two heat exchangers, and the two driving cabs and the two heat exchangers are arranged in a one-to-one correspondence.

8. The crane according to claim 3, characterized in that: The travel drive mechanism further comprises an electric air compressor (103) and a brake air storage tank (104); the electric air compressor (103) is electrically connected to the vehicle getting off controller (102); and the electric air compressor (103) is connected to the brake air storage tank.

9. The crane according to claim 3, characterized in that: The travel drive mechanism further comprises an electric steering oil pump (105) and a steering gear (106); the electric steering oil pump (105) is electrically connected to the vehicle getting-off controller (102); the electric steering oil pump (105) is connected to the steering gear (106); and the steering gear (106) is used to control the steering of the travel mechanism.

10. The crane according to claim 3, characterized in that: The fuel cell system (2) further includes a boost converter (204), and the crane further includes a battery distribution unit (6). The battery stack (201) is electrically connected to the onboard controller (304) and the offboard controller (102) via the boost converter (204) and the battery distribution unit (6).

Images