Hydrogen energy excavator and control system and control method thereof

Abstract

The invention discloses a hydrogen energy excavator and a control system and a control method thereof, the hydrogen energy excavator comprises a hydrogen fuel engine controller, the controller is connected with a first control end of a vehicle body controller through a first bus, and a first DCDC controller and a hydrogen supply system controller are arranged on the first bus; a second control end of the vehicle body controller is connected with a first interface of the display equipment through a second bus; the third control end is connected with an integrated controller through a third bus, and a first high-voltage output end of the integrated controller is connected with a second DCDC controller, so that the second DCDC controller converts high voltage output by the integrated controller into low voltage and outputs the low voltage to a water heat dissipation relay and an oil heat dissipation relay on the hydrogen energy excavator; different fans are controlled to dissipate heat; and the second high-pressure output end is connected with a hydrogen fuel engine system, so that the hydrogen fuel engine system converts high pressure output by the comprehensive controller into low pressure and outputs the low pressure to a hydrogen system heat dissipation relay to control a hydrogen system fan to dissipate heat.

Description

Technical Field

[0001] The present invention relates to the technical field of excavators, and in particular to a hydrogen energy excavator and a control system and a control method thereof. Background Art

[0002] Excavators, also known as excavating machinery, are earth-moving machines that use buckets to dig materials above or below the surface of the machine and load them into transport vehicles or unload them to stockpiles. The materials excavated by excavators are mainly soil, coal, silt, and pre-loosened soil and rocks. Excavators have become one of the most important engineering machinery in engineering construction.

[0003] Environmental pollution and energy shortage have become two prominent problems in today's society. In order to seek sustainable development of human society and the automotive industry, hydrogen fuel is recognized as a green energy that can solve energy and environmental problems at the same time. Hydrogen energy excavators are recognized as green and environmentally friendly excavators that can solve energy and environmental problems at the same time. They are one of the main directions for the development of excavators in the future. However, due to the constraints of hydrogen storage device technology, cost, life and reliability, it is difficult for hydrogen energy excavators to truly operate in the market. The starting of the car requires a large output power, transient response characteristics, and the cost of the hydrogen fuel system.

[0004] At present, due to the small size of hydrogen energy excavators, the existing hydrogen energy excavators mainly have the following defects:

[0005] For example, it is impossible to display the parameters and alarm information of the hydrogen system and hydrogen engine in real time, it is impossible to solve the problem of insufficient power supply to the whole machine when the cooling fan is working, and it is also impossible to realize the start and stop and energy management of the hydrogen fuel engine. Summary of the invention

[0006] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a hydrogen energy excavator and its control system and control method, which can display the parameters and alarm information of the hydrogen system and hydrogen engine in real time, solve the problem of insufficient power supply of the whole machine when the cooling fan is working, and realize the start and stop and energy management control of the hydrogen fuel engine.

[0007] The technical solution of the present invention is as follows:

[0008] In a first aspect, the present invention provides a hydrogen energy excavator control system, comprising:

[0009] A hydrogen fuel engine controller, wherein the hydrogen fuel engine controller is connected to a first control end of a body controller on a hydrogen energy excavator through a first bus, and a first DCDC controller and a hydrogen supply system controller are arranged on the first bus, wherein the first DCDC controller and the hydrogen supply system controller are respectively connected to the first bus through another bus;

[0010] The second control terminal of the vehicle body controller is connected to the first interface of the display device via a second bus;

[0011] The third control end of the vehicle body controller is connected to the integrated controller through the third bus, and the second DCDC controller is connected to the first high-voltage output end of the integrated controller, so that the second DCDC controller converts the high voltage output of the integrated controller into a low voltage and outputs it to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and respectively controls different cooling fans for heat dissipation; the hydrogen fuel engine system is connected to the second high-voltage output end of the integrated controller, so that the hydrogen fuel engine system converts the high voltage output of the integrated controller into a low voltage and outputs it to the hydrogen system cooling relay to control the hydrogen system cooling fan for heat dissipation.

[0012] Furthermore, in the above-mentioned hydrogen energy excavator control system, terminal resistors are respectively provided at the control end of the hydrogen fuel engine controller and the first control end of the vehicle body controller on the first bus.

[0013] Furthermore, in the above-mentioned hydrogen energy excavator control system, the second bus is also connected to the diagnostic interface, control panel, electric control handle, electric control foot pedal, T-box and power management module of the hydrogen energy excavator.

[0014] Furthermore, in the above-mentioned hydrogen energy excavator control system, an air-conditioning compressor controller, a WPTC controller, an air-conditioning controller and a radio controller are connected to the second interface of the display device through a seventh bus.

[0015] Furthermore, in the above-mentioned hydrogen energy excavator control system, a terminal resistor is integrated in the body controller, and two terminal resistors are integrated in the display device.

[0016] Furthermore, in the above-mentioned hydrogen energy excavator control system, a battery management system and a battery heat dissipation control system are connected to the third bus, and the battery management system is connected to the charging socket of the hydrogen energy excavator through the fourth bus, and is connected to the lithium battery pack of the hydrogen energy excavator through the sixth bus, so that the high-voltage charging box in the battery management system can be connected to an external power supply through the charging socket for charging, or charged through the lithium battery pack.

[0017] Furthermore, in the above-mentioned hydrogen energy excavator control system, a debugging interface is connected to the integrated controller via a fifth bus.

[0018] Furthermore, in the above-mentioned hydrogen energy excavator control system, terminal resistors are provided at the input end of the radio controller, the third control end of the body controller and the input end of the integrated controller.

[0019] In a second aspect, the present invention further provides a hydrogen-powered excavator, on which the hydrogen-powered excavator control system as described above is provided.

[0020] In a third aspect, the present invention further provides a hydrogen energy excavator control method using the above hydrogen energy excavator control system, comprising:

[0021] A hydrogen fuel engine controller, a first DCDC controller and a hydrogen supply system controller are arranged on the hydrogen energy excavator, and the hydrogen fuel engine controller, the first DCDC controller and the hydrogen supply system controller are connected to a first control terminal of a body controller on the hydrogen energy excavator;

[0022] A display device is arranged at a second control end of the vehicle body controller, and the display device is connected to the vehicle body controller via a second bus;

[0023] An integrated controller is arranged on the third control terminal of the vehicle body controller, and the arranged integrated controller is connected to the vehicle body controller via a third bus;

[0024] A second DCDC controller is arranged on the first high-voltage output end of the integrated controller, so that the second DCDC controller converts the high voltage outputted by the integrated controller into a low voltage outputted to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and controls different cooling fans to dissipate heat respectively;

[0025] A hydrogen fuel engine system is arranged on the second high-voltage output end of the integrated controller, so that the hydrogen fuel engine system converts the high voltage outputted by the integrated controller into a low voltage outputted to the hydrogen system heat dissipation relay to control the hydrogen system heat dissipation fan for heat dissipation.

[0026] The main advantages of the technical solution of the present invention are as follows:

[0027] The hydrogen energy excavator and its control system of the present invention realize the control of the start and stop, energy management and the like of the hydrogen fuel engine by connecting the hydrogen fuel engine controller, the first DCDC controller and the hydrogen supply system controller on the body controller of the hydrogen energy excavator in the form of a bus, and arrange the second DCDC controller on the control end of the integrated controller to convert the high voltage into the low voltage, thereby solving the problem of insufficient power supply of the hydrogen energy excavator when the cooling fan is working, and arrange the display device on the control end of the body controller so that the display device can display the parameters and alarm information of the hydrogen system and the hydrogen fuel engine in real time, thereby realizing the real-time monitoring of the hydrogen energy excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 This is a schematic structural diagram of a hydrogen energy excavator control system according to an embodiment of the present invention;

[0030] Figure 2 A power supply system diagram corresponding to a hydrogen energy excavator control system provided by an embodiment of the present invention;

[0031] Figure 3 A schematic flow chart of a method for controlling a hydrogen energy excavator according to an embodiment of the present invention;

[0032] Description of reference numerals:

[0033] 10. Hydrogen fuel engine controller; 11. First DCDC controller; 12. Hydrogen supply system controller; 13. Body controller;

[0034] 20. Diagnostic interface; 21. First button panel; 22. Second button panel; 23. Left electric control handle; 24. Right electric control handle; 25. Electric control foot pedal; 26. T-box; 27. Power management module;

[0035] 30. Battery management system; 31. Battery heat dissipation control system; 32. Integrated controller;

[0036] 40. Charging socket;

[0037] 50. Debug interface;

[0038] 60. Lithium battery pack;

[0039] 70. Display device; 71. Air conditioning compressor controller; 72. WPTC controller; 73. Air conditioning controller; 74. Radio controller. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] The following is combined with Figure 1-3 , describes in detail the technical solution provided by the embodiments of the present invention.

[0042] As attached Figure 1-2 As shown, an embodiment of the present invention provides a hydrogen energy excavator control system, the system comprising:

[0043] A hydrogen fuel engine controller 10 is connected to a first control end of a body controller 13 on a hydrogen energy excavator through a first bus, and a first DCDC controller 11 and a hydrogen supply system controller 12 (HCU) are arranged on the first bus, wherein the first DCDC controller 11 and the hydrogen supply system controller 12 are respectively connected to the first bus through another bus; the second control end of the body controller 13 is connected to a first interface of a display device 70 through a second bus; the third control end of the body controller 13 is connected to an integrated controller 32 through a third bus, and a second DCDC controller is connected to a first high-voltage output end of the integrated controller 32, so that the second DCDC controller converts the high voltage output of the integrated controller 32 into a low voltage output to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and controls different cooling fans for heat dissipation respectively; a hydrogen fuel engine system is connected to the second high-voltage output end of the integrated controller 32, so that the hydrogen fuel engine system (specifically DCL, which is a component of the hydrogen fuel engine system for converting voltage) converts the high voltage output of the integrated controller 32 into a low voltage output to the hydrogen system cooling relay to control the hydrogen system cooling fan for heat dissipation.

[0044] Therefore, the hydrogen energy excavator and its control system of the present invention realize the start and stop, energy management and other controls of the hydrogen fuel engine by connecting the hydrogen fuel engine controller 10, the first DCDC controller 11 and the hydrogen supply system controller 12 on the body controller 13 of the hydrogen energy excavator in a bus manner, and set the second DCDC controller on the control end of the integrated controller 32 to convert the high voltage into a low voltage, thereby solving the problem of insufficient power supply of the hydrogen energy excavator when the cooling fan is working. By setting the display device 70 on the control end of the body controller 13, the display device 70 can display the hydrogen system and hydrogen fuel engine parameters and alarm information in real time, thereby realizing real-time monitoring of the hydrogen energy excavator.

[0045] Specifically, the above-mentioned bus includes a CAN bus.

[0046] In some optional implementations of this embodiment, the display device 70 includes a display screen or a display. The hydrogen fuel engine controller 10 includes a hydrogen fuel cell controller (FCCU, Fuel Cell Control Unit), which can also be referred to as FCU.

[0047] Specifically, in the hydrogen energy excavator control system of the present invention, the second bus is also connected to the hydrogen energy excavator diagnostic interface 20, control panel (such as the first key panel 21 and the second key panel 22), electric control handle (such as the left electric control handle 23 and the right electric control handle 24), electric control foot pedal 25, T-box 26 and power management module 27. The air conditioning compressor controller 71, WPTC controller 72, air conditioning controller 73 and radio controller 74 are connected to the second interface of the display device 70 through the seventh bus.

[0048] Specifically, combined Figure 1 As shown, in the hydrogen energy excavator control system of the present invention, terminal resistors are respectively provided at the control end of the hydrogen fuel engine controller 10 and the first control end of the body controller 13 on the first bus. A terminal resistor is integrated in the body controller 13, and two terminal resistors are integrated in the display device 70, one of which acts on the second bus and the other acts on the seventh bus. Terminal resistors are provided at the input end of the radio controller 74, the third control end of the body controller 13, and the input end of the integrated controller 32.

[0049] By setting the above-mentioned terminal resistance, the set terminal resistance can adjust the level state on the bus, improve the anti-interference ability, ensure that the bus quickly enters the recessive state, improve the signal quality, suppress signal reflection and echo, and avoid the generation of ringing phenomenon.

[0050] In some optional implementations of this embodiment, the resistance of the terminal resistor set above is 120Ω.

[0051] Specifically, in the hydrogen energy excavator control system of the present invention, a battery management system 30 (BMS) and a battery heat dissipation control system (TMS) 31 are connected to the third bus, and the battery management system 30 is connected to the charging socket 40 of the hydrogen energy excavator through the fourth bus, and is connected to the lithium battery pack 60 of the hydrogen energy excavator through the sixth bus, so that the high-voltage charging box in the battery management system 30 can be connected to an external power supply through the charging socket 40 for charging, or charged through the lithium battery pack 60.

[0052] In some optional implementations of this embodiment, a hydrogen fuel engine may also be used as a power source, and the high voltage electricity output by the hydrogen fuel engine may be used to charge a high voltage charging box in the battery management system 30 .

[0053] Specifically, in the hydrogen energy excavator control system of the present invention, the debugging interface 50 is connected to the integrated controller 32 via the fifth bus.

[0054] With such configuration, the integrated controller 32 can be debugged via the debug interface 50 .

[0055] In summary, combined with Figure 1From the practical application, it can be seen that the hydrogen energy excavator and its control system of the present invention include 7 bus sub-networks, namely CAN1, CAN2, CAN3, CAN4, CAN5, CAN6 and CAN7. Among them, the CAN1 bus sub-network includes nodes such as the body controller 13, display screen, button panel 1, button panel 2, left electric control handle 23, right electric control handle 24, electric control foot pedal 25, T-box 26, power management module 27, etc. One terminal resistor is integrated inside the display screen, and the other is set at the radio controller 74 node; the CAN2 bus sub-network includes nodes such as the display screen, air-conditioning compressor controller 71, WPTC controller 72, air-conditioning controller 73, radio controller 74, etc. One terminal resistor is integrated inside the display screen, and the other is integrated inside the body controller 13; the CAN3 bus sub-network includes nodes such as the body controller 13, power management system BMS, battery cooling control system 31TMS, integrated controller 32 and other nodes, one terminal resistor is set at the body controller 13 node, and the other is set at the integrated controller 32 node; CAN4 is a charging bus; CAN5 is an integrated debugging bus; CAN6 is a communication bus between the lithium battery pack 60 and the battery management system (BMS) 30; the CAN7 subnetwork includes the body controller 13, the hydrogen supply system controller (HCU) 12, the second DCDC controller, the hydrogen engine controller FCU and other nodes, and one terminal resistor is set at the body controller 13, and the other is set at the hydrogen engine controller FCU. Among them, the display screen in the present invention has two bus interfaces, which are respectively connected to the CAN2 bus and the CAN1 bus. The body controller 13 is the main controller and has three bus interfaces, which are respectively connected to the CAN1 bus, the CAN3 bus, and the CAN7 bus. The CAN2 bus is accessed through the display screen, and the CAN4 bus and the CAN6 bus are accessed through the power management system BMS, so as to achieve coverage of the entire hydrogen energy excavator communication network and complete the whole machine communication and function control.

[0056] Combination Figure 2In practical application, the hydrogen energy excavator control system of the present invention includes two parts, high voltage and low voltage. The high voltage part includes a charging pile / charging socket 40, a lithium battery pack 60, a hydrogen fuel engine, a high voltage box, an integrated controller 32, a battery radiator, a second DCDC controller, a hydrogen fuel engine system, a drive motor, an air conditioning compressor, and a WPTC heater; the low voltage part includes a second DCDC controller, a hydrogen fuel engine system, a power relay, a water dispersion relay, an oil dispersion relay, a hydrogen system heat dissipation relay, and a number of cooling fans and low-voltage electrical appliances for the whole machine. There are two charging methods; one is to connect to the charging pile through the charging socket 40 to charge the lithium battery pack 60; the other is to input the high voltage electricity generated by the hydrogen fuel engine into the high voltage box, and charge the lithium battery pack 60 through the high voltage box. The discharge process includes: the lithium battery pack 60 outputs the high voltage electricity to the high voltage box, the first output end of the high voltage box outputs to the integrated controller 32, and the second output end of the high voltage box outputs to the battery radiator. The maximum low-voltage output power of the integrated controller 32 is 4.5Kw, which is output to the power relay for powering the low-voltage electrical appliances of the whole machine; the first output end of the integrated controller 32 is output to the second DCDC controller, and the second DCDC controller converts the input high-voltage electricity into low-voltage and outputs it to the water dispersion relay and the oil dispersion relay, and supplies power to the cooling fans 1-6 through the water dispersion relay and the oil dispersion relay; the second output end of the integrated controller 32 is output to the hydrogen fuel engine system, and the hydrogen fuel engine system converts the input high-voltage electricity into low-voltage and outputs it to the hydrogen system cooling relay, and supplies power to the hydrogen system cooling fans 1-3 through the hydrogen system cooling relay; the third output end of the integrated controller 32 is output to the drive motor to provide a high-voltage power supply for the drive motor; the fourth output end of the integrated controller 32 is output to the air-conditioning compressor to provide a high-voltage power supply for the air-conditioning compressor; the fifth output end of the integrated controller 32 is output to the WPTC heater to provide a high-voltage power supply for the WPTC heater.

[0057] In summary, the hydrogen energy excavator and its control system of the present invention form a CAN7 bus network with the hydrogen fuel engine controller (FCU) 10, the first DCDC controller 11, the hydrogen supply system controller (HCU) 12 and the body controller 13, and access the whole machine control network through the body controller 13, thereby realizing the start and stop, energy management and other controls of the hydrogen fuel engine; the high-voltage power supply is output by the integrated controller 32 to the second DCDC controller with a power of 6Kw, and is converted into a low-voltage power supply by the second DCDC controller to solve the problem of insufficient power supply of the whole machine when the cooling fan is working; the hydrogen system and hydrogen fuel engine parameters and alarm information are displayed in real time by the display device 70, so as to realize intuitive and real-time monitoring of the status of the hydrogen energy excavator.

[0058] Specifically, the principle of how to achieve the start and stop, energy management and other control of the hydrogen fuel engine by connecting to the whole machine control network through the vehicle body controller 13 is further explained:

[0059] First, the first network composed of FCU and the like communicates with the whole machine through the body controller 13, and can collect information related to start and stop as a judgment condition to determine whether start and stop are allowed; secondly, the first network composed of FCU and the like communicates with the whole machine through the body controller 13, and can obtain the energy usage status of the whole machine. According to the current energy demand, it controls the power battery to discharge alone, or the hydrogen fuel engine to supply power alone, or the power battery and the hydrogen fuel engine to supply power together, so that it can be connected to the whole machine control network through the body controller 13 to realize the start and stop, energy management and other controls of the hydrogen fuel engine.

[0060] In a second aspect, the present invention further provides a hydrogen energy excavator, on which the above-mentioned hydrogen energy excavator control system is provided.

[0061] As a result, the hydrogen energy excavator realizes the start and stop, energy management and other controls of the hydrogen fuel engine. It can also solve the problem of insufficient power supply to the whole machine when the cooling fan is working, and realize intuitive and real-time monitoring of the status of the hydrogen energy excavator.

[0062] Thirdly, Figure 3 As shown, the present invention also provides a hydrogen energy excavator control method using the above hydrogen energy excavator control system, comprising steps S1-S5:

[0063] Step S1: a hydrogen fuel engine controller 10, a first DCDC controller 11 and a hydrogen supply system controller 12 are arranged on the hydrogen energy excavator, and the hydrogen fuel engine controller 10, the first DCDC controller 11 and the hydrogen supply system controller 12 are connected to a first control terminal of a vehicle body controller 13 on the hydrogen energy excavator;

[0064] Step S2: a display device 70 is provided at the second control terminal of the vehicle body controller 13, and the display device 70 is connected to the vehicle body controller 13 via a second bus;

[0065] Step S3: an integrated controller 32 is provided on the third control terminal of the vehicle body controller 13, and the integrated controller 32 is connected to the vehicle body controller 13 via a third bus;

[0066] Step S4: a second DCDC controller is arranged on the first high-voltage output terminal of the integrated controller 32, so that the second DCDC controller converts the high voltage outputted by the integrated controller 32 into a low voltage outputted to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and controls different cooling fans to dissipate heat respectively;

[0067] Step S5: A hydrogen fuel engine system is arranged on the second high-voltage output terminal of the integrated controller 32, so that the hydrogen fuel engine system converts the high voltage outputted by the integrated controller 32 into a low voltage outputted to the hydrogen system cooling relay to control the hydrogen system cooling fan for heat dissipation.

[0068] In summary, the hydrogen energy excavator and the control method thereof of the present invention realize the start and stop, energy management and other controls of the hydrogen fuel engine by connecting the hydrogen fuel engine controller 10, the first DCDC controller 11 and the hydrogen supply system controller 12 on the body controller 13 of the hydrogen energy excavator in a bus manner, and set the second DCDC controller on the control end of the integrated controller 32 to convert the high voltage into a low voltage, thereby solving the problem of insufficient power supply of the hydrogen energy excavator when the cooling fan is working. By setting the display device 70 on the control end of the body controller 13, the display device 70 can display the hydrogen system and hydrogen fuel engine parameters and alarm information in real time, thereby realizing real-time monitoring of the hydrogen energy excavator.

[0069] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen energy excavator control system, characterized in that: include: A hydrogen fuel engine controller, wherein the hydrogen fuel engine controller is connected to a first control end of a body controller on a hydrogen energy excavator through a first bus, and a first DCDC controller and a hydrogen supply system controller are arranged on the first bus, wherein the first DCDC controller and the hydrogen supply system controller are respectively connected to the first bus through another bus; The second control terminal of the vehicle body controller is connected to the first interface of the display device via a second bus; The third control end of the vehicle body controller is connected to the integrated controller through the third bus, and the second DCDC controller is connected to the first high-voltage output end of the integrated controller, so that the second DCDC controller converts the high voltage output of the integrated controller into a low voltage and outputs it to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and respectively controls different cooling fans for heat dissipation; the hydrogen fuel engine system is connected to the second high-voltage output end of the integrated controller, so that the hydrogen fuel engine system converts the high voltage output of the integrated controller into a low voltage and outputs it to the hydrogen system cooling relay to control the hydrogen system cooling fan for heat dissipation.

2. The hydrogen energy excavator control system according to claim 1 is characterized in that: Terminal resistors are respectively provided at the control end of the hydrogen fuel engine controller and the first control end of the vehicle body controller on the first bus.

3. The hydrogen energy excavator control system according to claim 1 is characterized in that: The second bus is also connected to the diagnostic interface, control panel, electric control handle, electric control pedal, T-box and power management module of the hydrogen energy excavator.

4. The hydrogen energy excavator control system according to claim 1, characterized in that: The air-conditioning compressor controller, the WPTC controller, the air-conditioning controller and the radio controller are connected to the second interface of the display device via a seventh bus.

5. The hydrogen energy excavator control system according to claim 4 is characterized in that: A terminal resistor is integrated in the vehicle body controller, and two terminal resistors are integrated in the display device.

6. The hydrogen energy excavator control system according to claim 1, characterized in that: A battery management system and a battery heat dissipation control system are connected to the third bus, and the battery management system is connected to the charging socket of the hydrogen energy excavator through the fourth bus, and is connected to the lithium battery pack of the hydrogen energy excavator through the sixth bus, so that the high-voltage charging box in the battery management system can be connected to an external power source through the charging socket for charging, or charged through the lithium battery pack.

7. The hydrogen energy excavator control system according to claim 1, characterized in that: The integrated controller is connected to a debugging interface via a fifth bus.

8. The hydrogen energy excavator control system according to claim 4, characterized in that: Terminal resistors are arranged at the input end of the radio controller, the third control end of the vehicle body controller and the input end of the integrated controller.

9. A hydrogen energy excavator, characterized in that: The hydrogen energy excavator is provided with a hydrogen energy excavator control system as described in any one of claims 1 to 8.

10. A method for controlling a hydrogen-powered excavator using the hydrogen-powered excavator control system according to any one of claims 1 to 8, characterized in that: include: A hydrogen fuel engine controller, a first DCDC controller and a hydrogen supply system controller are arranged on the hydrogen energy excavator, and the hydrogen fuel engine controller, the first DCDC controller and the hydrogen supply system controller are connected to a first control terminal of a body controller on the hydrogen energy excavator; A display device is arranged at a second control end of the vehicle body controller, and the display device is connected to the vehicle body controller via a second bus; An integrated controller is arranged on the third control terminal of the vehicle body controller, and the arranged integrated controller is connected to the vehicle body controller via a third bus; A second DCDC controller is arranged on the first high-voltage output end of the integrated controller, so that the second DCDC controller converts the high voltage outputted by the integrated controller into a low voltage outputted to the water cooling relay and the oil cooling relay on the hydrogen energy excavator, and controls different cooling fans to dissipate heat respectively; A hydrogen fuel engine system is arranged on the second high-voltage output end of the integrated controller, so that the hydrogen fuel engine system converts the high voltage outputted by the integrated controller into a low voltage outputted to the hydrogen system heat dissipation relay to control the hydrogen system heat dissipation fan for heat dissipation.

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