A method and system for fault diagnosis and display of an all-in-one integrated controller for hydrogen fuel commercial vehicles

Abstract

The present invention proposes a method and system for fault diagnosis and display of an all-in-one integrated controller for hydrogen fuel commercial vehicles. The all-in-one integrated controller includes: a high- and low-voltage board module, a hydrogen fuel cell input module, a high-voltage fan output module, a DC-DC output module, an air pump output module, an oil pump output module, a PTC output module, a VCU controller, and an instrument module; the fault diagnosis and display method includes: the high- and low-voltage board modules of the all-in-one integrated controller compare the module's direct output current with the current fed back by the VCU controller, compare the contactor's direct output current with the current fed back by the VCU controller, compare the direct output current of each load with the current exchanged by the VCU controller, and compare the input current of each battery module with the current fed back by the VCU controller; through this method and the corresponding system, it is possible to diagnose which section of the problem component has a problem, detect the problem point, and provide accurate feedback on the instrument at the same time, so that after-sales problem handling can be carried out more accurately.

Description

Technical Field

[0001] The present invention proposes a fault diagnosis and display method and system for an all-in-one integrated controller of a hydrogen fuel commercial vehicle, relating to the technical field of hydrogen fuel commercial vehicles. Background Art

[0002] The operation of hydrogen fuel commercial vehicles mainly relies on the conversion of hydrogen into electrical energy. The electrical energy is distributed through the all-in-one controller. The distributed electrical energy is distributed to accessories such as the motor, oil pump, air pump, electric air conditioner 1, electric air conditioner 2, DC-DC, high-voltage fan, PTC, battery 1, battery 2, hydrogen fuel cell, etc., thereby meeting the normal operation of hydrogen fuel commercial vehicles.

[0003] Traditional commercial vehicle all-in-one controllers typically use a VCU to control the pre-charge relays and contactors within the all-in-one to complete power-up. These controllers only have a simple fault alarm strategy. High current or abnormal load conditions can lead to contactor sticking, fuse damage, and other faults. The instrument will only report a Level 3, Level 2, or Level 1 fault depending on the problem, or it may cyclically report Level 3, Level 2, or Level 1 faults. At this point, the instrument's internal feedback is too general, only confirming an internal fault within the all-in-one. The all-in-one manufacturer must then use a host computer to read and determine the data. This requires time for the all-in-one manufacturer to conduct on-site inspections, which are not as frequent as at service stations for fuel vehicles. Once the inspection is complete, the problem is identified, and the manufacturer must be contacted for parts, which also takes time. This leads to inconvenient after-sales service, prolonged repair times, a heavy workload in troubleshooting, and long waiting times for vehicle users. Summary of the Invention

[0004] The present invention provides a method and system for fault diagnosis and display of an all-in-one integrated controller for hydrogen fuel commercial vehicles to solve the above-mentioned problems:

[0005] The present invention proposes a method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle. The all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0006] The high and low pressure board modules, battery 1 input module, battery 2 input module, hydrogen fuel cell input module, high pressure fan output module, DC-DC output module, electric air conditioner 1 output module, electric air conditioner 2 output module, air pump output module, oil pump output module, PTC output module, VCU controller and instrument module, the high and low pressure board modules, battery 1 input module, battery 2 input module, hydrogen fuel cell input module, high pressure fan output module, DC-DC output module, electric air conditioner 1 output module, electric air conditioner 2 output module, air pump output module, oil pump output module, PTC output module, VCU controller and instrument module are all connected to the CAN bus signal.

[0007] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0008] The high and low voltage board modules diagnose faults by comparing the current output of each module, each contactor and each load with the information exchanged with the VCU controller, and then feed back the fault information to the instrument for display to the user;

[0009] The battery 1 input module is a detection device for the input of battery 1 to the all-in-one power distribution. Battery 1 is the energy storage device of the vehicle;

[0010] The battery 2 input module is a detection device for the battery 2 input to the all-in-one power distribution. Battery 2 is the energy storage device of the vehicle.

[0011] The hydrogen fuel cell input module is a detection device for the hydrogen fuel cell input to the all-in-one power distribution. The hydrogen fuel cell is the main energy supply for the hydrogen fuel commercial vehicle.

[0012] The high-voltage fan output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the high-voltage fan. The high-voltage fan is an accessory of the cooling system of the hydrogen fuel commercial vehicle.

[0013] The DC-DC output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the battery of the hydrogen fuel commercial vehicle. The battery is the low-voltage energy storage device of the vehicle;

[0014] The electric air conditioner 1 output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the driving air conditioner. The driving air conditioner is the air conditioner in the cab of the hydrogen fuel commercial vehicle.

[0015] The electric air conditioner 2 output module is a detection device for the output of the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the battery air conditioner power distribution. The battery air conditioner is the air conditioner for cooling the battery of the hydrogen fuel commercial vehicle;

[0016] The air pump output module is a detection device that outputs power from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the air pump. The air pump is the gas source generating device of the hydrogen fuel commercial vehicle.

[0017] The oil pump output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the power steering pump, which is the source of the power required for steering of the hydrogen fuel commercial vehicle;

[0018] The PTC output module is a detection device for the output of the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the heater power distribution, and the heater is a device for heating the cab of the hydrogen fuel commercial vehicle;

[0019] The VCU controller is responsible for exchanging data with the instrument panel and the all-in-one integrated controller, executing the control strategy of the hydrogen fuel commercial vehicle. It is responsible for sending component load data to the all-in-one integrated controller for diagnosis and judgment. The all-in-one integrated controller then feeds back the data to the VCU controller, which then sends it to the instrument panel for display.

[0020] The instrument module is a component responsible for displaying relevant vehicle information, displaying the speed, water temperature and SOC data of the hydrogen fuel commercial vehicle.

[0021] Furthermore, a method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle is provided, the method comprising:

[0022] The all-in-one integrated controller for hydrogen fuel commercial vehicles connects the low-voltage electrical system of the controller through the vehicle CAN bus after detecting that the vehicle switch is switched from the OFF position to the ON position. The all-in-one integrated controller internally detects the low-voltage electrical system to check whether the low voltage has a fault. If the low-voltage electrical system has a fault, the controller is powered off for troubleshooting.

[0023] If the low-voltage electrical system does not report a fault, the vehicle switch is switched from ON to START to connect the high-voltage electrical system of the all-in-one integrated controller to detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally detected in the all-in-one integrated controller. If the pre-charging is unsuccessful, the power is turned off for inspection.

[0024] Furthermore, a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle is provided, wherein the all-in-one integrated controller detects high-voltage electrical components, including:

[0025] The all-in-one integrated controller inputs current to each battery and gives an enable signal, and compares the current data input by each battery module with the current data communicated by the VCU controller through the high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0026] The all-in-one integrated controller outputs current to each load module and gives an enable signal. The high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles compares the current data output to each battery module with the current data communicated by the VCU controller.

[0027] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle is provided, wherein the all-in-one integrated controller inputs current to each battery and gives an enable signal, and compares the current data input by each battery module with the current data communicated by the VCU controller through the high and low voltage board modules of the all-in-one integrated controller for a hydrogen fuel commercial vehicle, including:

[0028] Each battery includes: a hydrogen fuel cell, battery 1 and battery 2;

[0029] The all-in-one integrated controller sends a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2. The hydrogen fuel cell, battery 1 and battery 2 input high voltage electricity to the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor respectively, and communicates and interacts with the VCU controller to pass the current through the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor.

[0030] The high and low voltage board module in the all-in-one integrated controller compares the current of the input contactor with the current communicated with the VCU controller, and communicates the comparison result to the VCU controller. The VCU controller sends a control signal to the instrument module, and the analysis result is displayed on the instrument;

[0031] The hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively, and the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively input high voltage electricity to the hydrogen fuel cell module, the battery 1 module and the battery 2 module;

[0032] The hydrogen fuel cell module, battery 1 module, and battery 2 module respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0033] The all-in-one integrated controller collects the input current and the current data communicated through the VCU controller and compares them;

[0034] The high and low voltage board modules of the all-in-one integrated controller compare the direct output current of the module and the current fed back by the VCU controller, compare the direct output current of the contactor and the current fed back by the VCU controller, compare the direct output current of each load and the current interacted by the VCU controller, compare the input current of each battery module and the current fed back by the VCU controller, and communicate the comparison results to the VCU controller. The VCU controller sends a control signal to the instrument module and displays the analysis results on the instrument.

[0035] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle is provided, wherein the all-in-one integrated controller outputs current to each load module and gives an enable signal, and compares the current data output to each battery module with the current data communicated by the VCU controller through the high and low voltage board module of the all-in-one integrated controller for a hydrogen fuel commercial vehicle, including:

[0036] The all-in-one integrated controller outputs high voltage electricity to the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high voltage fan module respectively;

[0037] After receiving the high-voltage electrical signal, the air pump module, the oil pump module, the electric air conditioner 1 module, the DC-DC module, the electric air conditioner 2 module and the high-voltage fan module communicate and interact with the VCU controller and send the operation information of each module to the VCU controller;

[0038] The air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module output high voltage electricity to the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively;

[0039] After receiving the high-voltage electrical signal, the air pump contactor, the oil pump contactor, the electric air conditioner 1 contactor, the DC-DC contactor, the electric air conditioner 2 contactor and the high-voltage fan contactor communicate and interact with the VCU controller, and send the interaction status of each contactor to the VCU controller;

[0040] The air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse;

[0041] After receiving the high-voltage electrical signal, the air pump fuse, the oil pump fuse, the electric air conditioner 1 fuse, the DC-DC fuse, the electric air conditioner 2 fuse and the high-voltage fan fuse respectively output high-voltage electricity to the air pump, the oil pump, the electric air conditioner 1, the DC-DC, the electric air conditioner 2 and the high-voltage fan;

[0042] After receiving the high-voltage electrical signal, the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan communicate and interact with the VCU controller and send the load operation information to the VCU controller.

[0043] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0044] The modules include: air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module;

[0045] The operating information of each module includes: air pump command, oil pump command, DCL1 enable signal, DCL2 enable signal, i.e. electric air conditioner 1 enable signal, DCL3 enable signal, i.e. electric air conditioner 2 enable signal, and DCL4 enable signal, i.e. high-voltage fan enable signal.

[0046] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0047] The contactors include: air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor;

[0048] The interaction status of each contactor includes: whether each contactor is open, closed, stuck, and retained.

[0049] Furthermore, a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0050] The loads include: air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan;

[0051] Air pump operation information includes: air pump speed, air pump bus voltage, air pump output current, air pump controller temperature, air pump status, air pump fault code and air pump life signal;

[0052] Oil pump operation information includes: oil pump speed, oil pump bus voltage, oil pump output current, oil pump controller temperature, oil pump status, oil pump fault code and oil pump life signal;

[0053] DC-DC operation information includes: DCL1 input voltage, DCL1 output voltage, DCL1 output current, DC-DC heat sink temperature, DC1 working status, DC1 fault code and DC-DC life signal;

[0054] The operating information of the electric air conditioner 1 includes: DC2 input voltage, DC2 output voltage, DC2 output current, DC2 radiator temperature, DC2 control status, DC2 fault code and DC2 life signal;

[0055] Electric air conditioner 2 operating information includes: DC3 input voltage, DC3 output voltage, DC3 output current, DC3 radiator temperature, DC3 control status, DC3 fault code and DC3 life signal;

[0056] High-voltage fan operation information includes: DC4 input voltage, DC4 output voltage, DC4 output current, DC4 radiator temperature, DC4 control status, DC4 fault code and DC4 life signal.

[0057] Furthermore, a hydrogen fuel commercial vehicle all-in-one integrated controller fault diagnosis and display system is provided, the system comprising:

[0058] The low-voltage detection module is used to connect the low-voltage electrical system of the controller through the vehicle CAN bus when the all-in-one integrated controller of the hydrogen fuel commercial vehicle detects that the vehicle switch is switched from the OFF position to the ON position. The all-in-one integrated controller internally detects the low-voltage electrical system to detect whether the low voltage has reported a fault. If the low-voltage electrical system reports a fault, the power is turned off for troubleshooting.

[0059] The high-voltage detection module is used to switch the vehicle switch from the ON position to the START position to connect the high-voltage electrical system of the all-in-one integrated controller if there is no fault in the low-voltage electrical system, and detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally detected in the all-in-one integrated controller. If the pre-charging is unsuccessful, the power is turned off for troubleshooting;

[0060] The judgment contactor interaction module is used for the all-in-one integrated controller to send a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2. The hydrogen fuel cell, battery 1 and battery 2 respectively input high voltage electricity to the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor, and communicate and interact with the VCU controller to pass the current of the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor. The VCU controller analyzes whether there is any abnormality in the current and displays the analysis result on the instrument;

[0061] Input high voltage electricity to the fuse module, the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively, and the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse input high voltage electricity to the hydrogen fuel cell module, the battery 1 module and the battery 2 module respectively;

[0062] A feedback module, configured for the hydrogen fuel cell module, battery 1 module, and battery 2 module to respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0063] Comparison module, an all-in-one integrated controller collects input current and current data communicated through the VCU controller and compares them;

[0064] A high-voltage power module is output to the module, and is used for the all-in-one integrated controller to output high-voltage power to the air pump module, the oil pump module, the electric air conditioner 1 module, the DC-DC module, the electric air conditioner 2 module and the high-voltage fan module respectively;

[0065] The module operation information sending module is used for the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the operation information of each module to the VCU controller;

[0066] Output high-voltage electricity module to the contactor, used for the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module to output high voltage electricity to the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively;

[0067] The contactor operation information sending module is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the interaction status of each contactor to the VCU controller;

[0068] A high-voltage electricity output module to the fuse is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse respectively;

[0069] The load output module is used for the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse to output high voltage electricity to the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan respectively after receiving the high-voltage electrical signal;

[0070] A load information sending module is used for the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the load operation information to the VCU controller;

[0071] A comparison module is used for the high and low voltage board module comparison module of the all-in-one integrated controller to compare the direct output current of the module and the current fed back by the VCU controller communication, compare the direct output current of the contactor and the current fed back by the VCU controller communication, compare the direct output current of each load and the current of the VCU controller communication interaction, and compare the input current of each battery module and the current fed back by the VCU controller communication.

[0072] The beneficial effects of the present invention are as follows: under the input and output power distribution conditions, the all-in-one integrated controller can effectively diagnose problem faults in three stages. The diagnosis will maintain the function of fault diagnosis from the early stage of upper high voltage to the lower high voltage, and will simultaneously display the problem point to the instrument display, which can be specifically reflected in the high and low voltage board to contactor, contactor to fuse, and fuse to load status; this system is divided into a high-voltage part and a low-voltage part, and the output of high-voltage electricity is controlled by a low-voltage signal. There is current feedback when the high voltage is output, and the three data are analyzed respectively through the high and low voltage board modules in the all-in-one, the contactors of each component, and the load feedback current. Each input and output component will have three types of problem judgments. Finally, the problem fault point can be accurately determined and displayed through the instrument module. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 This is a flow chart of the fault diagnosis and display method of the all-in-one integrated controller for hydrogen fuel commercial vehicles according to the present invention;

[0074] Figure 2 This is a diagram of the internal system of the all-in-one integrated controller for hydrogen fuel commercial vehicles according to the present invention;

[0075] Figure 3 This is a schematic diagram of the high-voltage power distribution principle of the all-in-one integrated controller for hydrogen fuel commercial vehicles according to the present invention;

[0076] Figure 4 This is a low-voltage power distribution schematic diagram of the all-in-one integrated controller for hydrogen fuel commercial vehicles according to the present invention;

[0077] Figure 5 This is a diagram showing the interface between the all-in-one integrated controller and the low-voltage instrument display for a hydrogen fuel commercial vehicle according to the present invention;

[0078] Figure 6 This is a diagram showing the display interface from the contactor to the insurance instrument in the all-in-one integrated controller for hydrogen fuel commercial vehicles of the present invention;

[0079] Figure 7 This is a diagram showing the display interface of the all-in-one integrated controller for hydrogen fuel commercial vehicles according to the present invention, from insurance to component instruments;

[0080] Figure 8 This is a diagram showing the display interface of the all-in-one integrated controller to the contactor instrument of the hydrogen fuel commercial vehicle of the present invention;

[0081] Attachment Figure 9 This is a schematic diagram of the high-voltage power distribution principle of the all-in-one integrated controller for hydrogen fuel commercial vehicles of the present invention. DETAILED DESCRIPTION

[0082] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein may be combined with each other.

[0083] The following description sets forth numerous specific details to facilitate a thorough understanding of the present invention. The embodiments described are merely a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0085] One embodiment of the present invention provides a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle. The all-in-one integrated controller for a hydrogen fuel commercial vehicle includes:

[0086] The high and low pressure board modules, battery 1 input module, battery 2 input module, hydrogen fuel cell input module, high pressure fan output module, DC-DC output module, electric air conditioner 1 output module, electric air conditioner 2 output module, air pump output module, oil pump output module, PTC output module, VCU controller and instrument module, the high and low pressure board modules, battery 1 input module, battery 2 input module, hydrogen fuel cell input module, high pressure fan output module, DC-DC output module, electric air conditioner 1 output module, electric air conditioner 2 output module, air pump output module, oil pump output module, PTC output module, VCU controller and instrument module are all connected to the CAN bus signal.

[0087] The working principle and effect of the above technical solution are as follows: this system is divided into a high-voltage part and a low-voltage part. The output of high-voltage electricity is controlled by a low-voltage signal. There is current feedback during high-voltage output. The three data are analyzed through the high- and low-voltage board modules in the all-in-one, the contactors of each component, and the load feedback current. Each input and output component will have three types of problem judgments. Finally, the problem fault point can be accurately determined and displayed through the instrument module.

[0088] One embodiment of the present invention provides a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, characterized by comprising:

[0089] The high and low voltage board modules can determine the output current of the high voltage board, analyze the relevant data by comparing the current output of each component, and then compare it with the load status feedback from the VCU, so as to feed back the relevant information to the instrument for display to the user.

[0090] The battery 1 input module is a detection device for the input of battery 1 to the all-in-one power distribution. Battery 1 is the energy storage device of the vehicle. The all-in-one integrated controller of the hydrogen fuel commercial vehicle collects the current input from battery 1 and compares it with the data collected from the battery by the VCU.

[0091] The battery 2 input module is a detection device for the input of battery 2 to the all-in-one power distribution. Battery 2 is the energy storage device of the vehicle. The all-in-one integrated controller of the hydrogen fuel commercial vehicle collects the current input from battery 1 and compares it with the data collected by the VCU.

[0092] The hydrogen fuel cell input module is a detection device for the hydrogen fuel cell input to the all-in-one power distribution. The hydrogen fuel cell is the main energy supply for the vehicle. The all-in-one integrated controller for hydrogen fuel commercial vehicles collects the current input from the hydrogen fuel cell and compares it with the hydrogen fuel cell data collected by the VCU.

[0093] The high-voltage fan output module is an all-in-one detection device that outputs power to the high-voltage fan. The high-voltage fan is an accessory to the vehicle's cooling system. The fan removes heat generated during vehicle operation to achieve the purpose of heat dissipation. The all-in-one integrated controller for hydrogen fuel commercial vehicles collects the high-voltage fan output current and compares it with the battery data collected by the VCU.

[0094] The DC-DC output module is an all-in-one detection device that outputs power to the vehicle's battery. The battery is the vehicle's low-voltage energy storage device. The all-in-one integrated controller for hydrogen fuel cell commercial vehicles collects DC-DC output current and compares it with the battery data collected by the VCU.

[0095] The electric air conditioner 1 output module is an all-in-one detection device that outputs power to the onboard air conditioner. The onboard air conditioner is the air conditioner in the vehicle's cab. The all-in-one integrated controller for hydrogen fuel cell commercial vehicles collects the current output by the electric air conditioner 1 and compares it with the battery data collected by the VCU.

[0096] The electric air conditioner 2 output module is an all-in-one detection device that outputs power to the battery air conditioner. The battery air conditioner is the air conditioner that cools the vehicle's batteries. The hydrogen fuel cell commercial vehicle all-in-one integrated controller collects the current output by the electric air conditioner 2 and compares it with the data collected from the battery by the VCU.

[0097] The air pump output module is an all-in-one detection device that outputs power to the air pump. The air pump is the vehicle's gas source generator. The all-in-one integrated controller for hydrogen fuel commercial vehicles collects the current output by the air pump and compares it with the data collected by the VCU from the air pump.

[0098] The oil pump output module is an all-in-one detection device that outputs power to the power steering pump. The power steering pump is the source of the vehicle's steering power. The all-in-one integrated controller for hydrogen fuel cell commercial vehicles collects the oil pump output current and compares it with the data collected by the VCU.

[0099] The PTC output module is an all-in-one detection device that outputs power to the heater. The heater is a device for heating the vehicle's cab. The all-in-one integrated controller for hydrogen fuel commercial vehicles collects the current output by the PTC and compares it with the data collected by the VCU.

[0100] The VCU controller is responsible for exchanging data with the instrument panel and the all-in-one integrated controller. It executes the relevant control strategies of the whole vehicle and is responsible for sending component load data to the all-in-one integrated controller for diagnosis and judgment. The all-in-one integrated controller then feeds back the data to the VCU, which then sends it to the instrument panel for display.

[0101] The instrument module is the component responsible for displaying relevant vehicle information. It can display data such as speed, water temperature, SOC, etc., and can provide real-time feedback on relevant vehicle alarm information.

[0102] One embodiment of the present invention provides a method for displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, characterized in that the method comprises:

[0103] The all-in-one integrated controller for hydrogen fuel commercial vehicles connects the low-voltage electrical system of the controller through the vehicle CAN bus after detecting that the vehicle switch is switched from the OFF position to the ON position. The all-in-one integrated controller internally detects the low-voltage electrical system to check whether the low voltage has a fault. If the low-voltage electrical system has a fault, the controller is powered off for troubleshooting.

[0104] If the low-voltage electrical system does not report a fault, the vehicle switch is switched from ON to START to connect the high-voltage electrical system of the all-in-one integrated controller to detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally detected in the all-in-one integrated controller. If the pre-charging is unsuccessful, the power is turned off for inspection.

[0105] One embodiment of the present invention provides a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, wherein the method detects high-voltage electrical components within the all-in-one integrated controller, including:

[0106] The all-in-one integrated controller inputs current to each battery and gives an enable signal, and compares the current data input by each battery module with the current data communicated by the VCU controller through the high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0107] The all-in-one integrated controller outputs current to each load module and gives an enable signal. The high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles compares the current data output to each battery module with the current data communicated by the VCU controller.

[0108] One embodiment of the present invention provides a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle. The all-in-one integrated controller inputs current to each battery and provides an enable signal. The high and low voltage board modules of the all-in-one integrated controller for the hydrogen fuel commercial vehicle compare the current data input by each battery module with the current data communicated by the VCU controller, including:

[0109] Each battery includes: a hydrogen fuel cell, battery 1 and battery 2;

[0110] The all-in-one integrated controller sends a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2. The hydrogen fuel cell, battery 1 and battery 2 input high voltage electricity to the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor respectively, and communicates and interacts with the VCU controller to pass the current through the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor.

[0111] The high and low voltage board module in the all-in-one integrated controller compares the current of the input contactor with the current communicated with the VCU controller, and communicates the comparison result to the VCU controller. The VCU controller sends a control signal to the instrument module, and the analysis result is displayed on the instrument;

[0112] The hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively, and the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively input high voltage electricity to the hydrogen fuel cell module, the battery 1 module and the battery 2 module;

[0113] The hydrogen fuel cell module, battery 1 module, and battery 2 module respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0114] The all-in-one integrated controller collects the input current and the current data communicated through the VCU controller and compares them;

[0115] The high and low voltage board modules of the all-in-one integrated controller compare the direct output current of the module and the current fed back by the VCU controller, compare the direct output current of the contactor and the current fed back by the VCU controller, compare the direct output current of each load and the current interacted by the VCU controller, compare the input current of each battery module and the current fed back by the VCU controller, and communicate the comparison results to the VCU controller. The VCU controller sends a control signal to the instrument module and displays the analysis results on the instrument.

[0116] One embodiment of the present invention provides a method for diagnosing and displaying a fault of an all-in-one integrated controller for a hydrogen fuel commercial vehicle. The all-in-one integrated controller outputs current to each load module and provides an enable signal. The high and low voltage board modules of the all-in-one integrated controller for the hydrogen fuel commercial vehicle compare the current data output to each battery module with the current data communicated by the VCU controller, including:

[0117] The all-in-one integrated controller outputs high voltage electricity to the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high voltage fan module respectively;

[0118] After receiving the high-voltage electrical signal, the air pump module, the oil pump module, the electric air conditioner 1 module, the DC-DC module, the electric air conditioner 2 module and the high-voltage fan module communicate and interact with the VCU controller and send the operation information of each module to the VCU controller;

[0119] The air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module output high voltage electricity to the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively;

[0120] After receiving the high-voltage electrical signal, the air pump contactor, the oil pump contactor, the electric air conditioner 1 contactor, the DC-DC contactor, the electric air conditioner 2 contactor and the high-voltage fan contactor communicate and interact with the VCU controller, and send the interaction status of each contactor to the VCU controller;

[0121] The air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse;

[0122] After receiving the high-voltage electrical signal, the air pump fuse, the oil pump fuse, the electric air conditioner 1 fuse, the DC-DC fuse, the electric air conditioner 2 fuse and the high-voltage fan fuse respectively output high-voltage electricity to the air pump, the oil pump, the electric air conditioner 1, the DC-DC, the electric air conditioner 2 and the high-voltage fan;

[0123] After receiving the high-voltage electrical signal, the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan communicate and interact with the VCU controller and send the load operation information to the VCU controller.

[0124] One embodiment of the present invention provides a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, comprising:

[0125] The modules include: air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module;

[0126] The operating information of each module includes: air pump command, oil pump command, DCL1 enable signal, DCL2 enable signal, i.e. electric air conditioner 1 enable signal, DCL3 enable signal, i.e. electric air conditioner 2 enable signal, and DCL4 enable signal, i.e. high-voltage fan enable signal.

[0127] One embodiment of the present invention provides a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, comprising:

[0128] The contactors include: air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor;

[0129] The interaction status of each contactor includes: whether each contactor is open, closed, stuck, and retained.

[0130] One embodiment of the present invention provides a method for diagnosing and displaying faults of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, comprising:

[0131] The loads include: air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan;

[0132] Air pump operation information includes: air pump speed, air pump bus voltage, air pump output current, air pump controller temperature, air pump status, air pump fault code and air pump life signal;

[0133] Oil pump operation information includes: oil pump speed, oil pump bus voltage, oil pump output current, oil pump controller temperature, oil pump status, oil pump fault code and oil pump life signal;

[0134] DC-DC operation information includes: DCL1 input voltage, DCL1 output voltage, DCL1 output current, DC-DC heat sink temperature, DC1 working status, DC1 fault code and DC-DC life signal;

[0135] The operating information of the electric air conditioner 1 includes: DC2 input voltage, DC2 output voltage, DC2 output current, DC2 radiator temperature, DC2 control status, DC2 fault code and DC2 life signal;

[0136] Electric air conditioner 2 operating information includes: DC3 input voltage, DC3 output voltage, DC3 output current, DC3 radiator temperature, DC3 control status, DC3 fault code and DC3 life signal;

[0137] High-voltage fan operation information includes: DC4 input voltage, DC4 output voltage, DC4 output current, DC4 radiator temperature, DC4 control status, DC4 fault code and DC4 life signal.

[0138] One embodiment of the present invention provides an all-in-one integrated controller fault diagnosis and display system for hydrogen fuel commercial vehicles, the system comprising:

[0139] The low-voltage detection module is used to connect the low-voltage electrical system of the controller through the vehicle CAN bus when the all-in-one integrated controller of the hydrogen fuel commercial vehicle detects that the vehicle switch is switched from the OFF position to the ON position. The all-in-one integrated controller internally detects the low-voltage electrical system to detect whether the low voltage has reported a fault. If the low-voltage electrical system reports a fault, the power is turned off for troubleshooting.

[0140] The high-voltage detection module is used to switch the vehicle switch from the ON position to the START position to connect the high-voltage electrical system of the all-in-one integrated controller if there is no fault in the low-voltage electrical system, and detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally detected in the all-in-one integrated controller. If the pre-charging is unsuccessful, the power is turned off for troubleshooting;

[0141] The judgment contactor interaction module is used for the all-in-one integrated controller to send a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2. The hydrogen fuel cell, battery 1 and battery 2 respectively input high voltage electricity to the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor, and communicate and interact with the VCU controller to pass the current of the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor. The VCU controller analyzes whether there is any abnormality in the current and displays the analysis result on the instrument;

[0142] Input high voltage electricity to the fuse module, the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively, and the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse input high voltage electricity to the hydrogen fuel cell module, the battery 1 module and the battery 2 module respectively;

[0143] A feedback module, configured for the hydrogen fuel cell module, battery 1 module, and battery 2 module to respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles;

[0144] Comparison module, an all-in-one integrated controller collects input current and current data communicated through the VCU controller and compares them;

[0145] A high-voltage power module is output to the module, and is used for the all-in-one integrated controller to output high-voltage power to the air pump module, the oil pump module, the electric air conditioner 1 module, the DC-DC module, the electric air conditioner 2 module and the high-voltage fan module respectively;

[0146] The module operation information sending module is used for the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the operation information of each module to the VCU controller;

[0147] Output high-voltage electricity module to the contactor, used for the air pump module, oil pump module, electric air conditioner 1 module, DC-DC module, electric air conditioner 2 module and high-voltage fan module to output high voltage electricity to the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively;

[0148] The contactor operation information sending module is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the interaction status of each contactor to the VCU controller;

[0149] A high-voltage electricity output module to the fuse is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse respectively;

[0150] The load output module is used for the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse to output high voltage electricity to the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan respectively after receiving the high-voltage electrical signal;

[0151] A load information sending module is used for the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the load operation information to the VCU controller;

[0152] A comparison module is used for the high and low voltage board module comparison module of the all-in-one integrated controller to compare the direct output current of the module and the current fed back by the VCU controller communication, compare the direct output current of the contactor and the current fed back by the VCU controller communication, compare the direct output current of each load and the current of the VCU controller communication interaction, and compare the input current of each battery module and the current fed back by the VCU controller communication.

[0153] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle, characterized in that: The all-in-one integrated controller for hydrogen fuel commercial vehicles includes: The high and low pressure board modules, the battery 1 input module, the battery 2 input module, the hydrogen fuel cell input module, the high pressure fan output module, the DC-DC output module, the electric air conditioner 1 output module, the electric air conditioner 2 output module, the air pump output module, the oil pump output module, the PTC output module, the VCU controller and the instrument module are all connected to the CAN bus signal; The hydrogen fuel commercial vehicle all-in-one integrated controller connects the low-voltage electrical system of the all-in-one integrated controller through the vehicle CAN bus after detecting that the vehicle switch is switched from the OFF position to the ON position. The all-in-one integrated controller internally detects the low-voltage electrical system to check whether the low-voltage electrical system reports a fault. If the low-voltage electrical system reports a fault, the controller disconnects the controller for troubleshooting. If the low-voltage electrical system does not report a fault, the vehicle switch is switched from the ON position to the START position to connect the high-voltage electrical system of the all-in-one integrated controller to detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally tested in the all-in-one integrated controller. If the pre-charging is unsuccessful, the vehicle is powered off for troubleshooting. The all-in-one integrated controller internally detects high voltage electrical equipment, including: The all-in-one integrated controller inputs current to each battery and gives an enable signal. The high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles compares the current input to each battery contactor with the current communicated with the VCU controller, and compares the current data input by each battery module with the current data communicated with the VCU controller. Each battery includes: a hydrogen fuel cell, battery 1, and battery 2. The all-in-one integrated controller outputs current to each load module and gives an enable signal. The high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles compares the current data output by each load module with the current data communicated by the VCU controller, compares the current directly output by each load contactor with the current feedback from the VCU controller, and compares the current directly output by each load with the current communicated by the VCU controller; each load includes: an air pump, an oil pump, an electric air conditioner 1, a DC-DC, an electric air conditioner 2, and a high-voltage fan; The comparison results are communicated to the VCU controller, and the VCU controller sends a control signal to the instrument module to display the analysis results on the instrument.

2. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 1, characterized in that: include: The high and low voltage board modules diagnose faults by comparing the current output of each load module, each load contactor and each load with the current data communicated with the VCU controller, and then feed back the fault information to the instrument for display to the user; The battery 1 input module is a detection device for the input of battery 1 to the all-in-one power distribution. Battery 1 is the energy storage device of the vehicle; The battery 2 input module is a detection device for the battery 2 input to the all-in-one power distribution. Battery 2 is the energy storage device of the vehicle. The hydrogen fuel cell input module is a detection device for the hydrogen fuel cell input to the all-in-one power distribution. The hydrogen fuel cell is the main energy supply for the hydrogen fuel commercial vehicle. The high-voltage fan output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the high-voltage fan. The high-voltage fan is an accessory of the cooling system of the hydrogen fuel commercial vehicle. The DC-DC output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the battery of the hydrogen fuel commercial vehicle. The battery is a low-voltage energy storage device for the vehicle; The electric air conditioner 1 output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the driving air conditioner. The driving air conditioner is the air conditioner in the cab of the hydrogen fuel commercial vehicle. The electric air conditioner 2 output module is a detection device for the output of the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the battery air conditioner power distribution. The battery air conditioner is the air conditioner for cooling the battery of the hydrogen fuel commercial vehicle; The air pump output module is a detection device for the output of the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the air pump power distribution, and the air pump is the gas source generating device of the hydrogen fuel commercial vehicle; The oil pump output module is a detection device for the power distribution from the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the power steering pump, which is the source of the power required for steering of the hydrogen fuel commercial vehicle; The PTC output module is a detection device for the output of the all-in-one integrated controller of the hydrogen fuel commercial vehicle to the heater power distribution, and the heater is a device for heating the cab of the hydrogen fuel commercial vehicle; The VCU controller is the hub responsible for exchanging data with the instrument panel and the all-in-one integrated controller, executing the control strategy of the hydrogen fuel commercial vehicle. It is responsible for sending component load data to the all-in-one integrated controller for diagnosis and judgment. The all-in-one integrated controller then feeds back the data to the VCU controller, which then sends it to the instrument panel for display. The instrument module is a component responsible for displaying relevant vehicle information, displaying the speed, water temperature and SOC data of the hydrogen fuel commercial vehicle.

3. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 2, characterized in that: The all-in-one integrated controller inputs current to each battery and gives an enable signal. The high and low voltage board modules of the all-in-one integrated controller for hydrogen fuel commercial vehicles compare the current input to each battery contactor with the current communicated with the VCU controller, and compare the current data input to each battery module with the current data communicated with the VCU controller, including: The all-in-one integrated controller sends a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2, and the hydrogen fuel cell, battery 1 and battery 2 respectively input high voltage electricity to the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor, and communicate and interact with the VCU controller to pass the current of the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor. The high and low voltage board module in the all-in-one integrated controller compares the current input to each battery contactor with the current communicated and interacted with the VCU controller, and communicates and interacts the comparison result to the VCU controller. The VCU controller sends a control signal to the instrument module, and displays the analysis result on the instrument; The hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively, and the hydrogen fuel cell fuse, the battery 1 fuse and the battery 2 fuse respectively input high voltage electricity to the hydrogen fuel cell input module, the battery 1 input module and the battery 2 input module; The hydrogen fuel cell input module, battery 1 input module, and battery 2 input module respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles; The all-in-one integrated controller collects the input current and the current data communicated through the VCU controller and compares them.

4. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 3, characterized in that: The all-in-one integrated controller outputs current to each load module and gives an enable signal. The high and low voltage board module of the all-in-one integrated controller for hydrogen fuel commercial vehicles compares the current data output by each load module with the current data communicated by the VCU controller, compares the current directly output by each load contactor with the current feedback from the VCU controller, and compares the current directly output by each load with the current of the VCU controller communication interaction, including: The all-in-one integrated controller outputs high voltage electricity to the air pump output module, the oil pump output module, the electric air conditioner 1 output module, the DC-DC output module, the electric air conditioner 2 output module and the high-voltage fan output module respectively; After receiving the high-voltage electrical signal, the air pump output module, the oil pump output module, the electric air conditioner 1 output module, the DC-DC output module, the electric air conditioner 2 output module and the high-voltage fan output module communicate and interact with the VCU controller and send the operation information of each load module to the VCU controller; The air pump output module, the oil pump output module, the electric air conditioner 1 output module, the DC-DC output module, the electric air conditioner 2 output module and the high-voltage fan output module output high voltage electricity to the air pump contactor, the oil pump contactor, the electric air conditioner 1 contactor, the DC-DC contactor, the electric air conditioner 2 contactor and the high-voltage fan contactor respectively; After receiving the high-voltage electrical signal, the air pump contactor, the oil pump contactor, the electric air conditioner 1 contactor, the DC-DC contactor, the electric air conditioner 2 contactor and the high-voltage fan contactor communicate and interact with the VCU controller, and send the interaction status of each load contactor to the VCU controller; The air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse; After receiving the high-voltage electrical signal, the air pump fuse, the oil pump fuse, the electric air conditioner 1 fuse, the DC-DC fuse, the electric air conditioner 2 fuse and the high-voltage fan fuse respectively output high-voltage electricity to the air pump, the oil pump, the electric air conditioner 1, the DC-DC, the electric air conditioner 2 and the high-voltage fan; After receiving the high-voltage electrical signal, the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan communicate and interact with the VCU controller and send the operating information of each load to the VCU controller.

5. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 4, characterized in that: include: Each load module includes: air pump output module, oil pump output module, electric air conditioner 1 output module, DC-DC output module, electric air conditioner 2 output module and high-voltage fan output module; The operating information of each load module includes: air pump command, oil pump command, DCL1 enable signal, i.e. DC-DC enable signal, DCL2 enable signal, i.e. electric air conditioner 1 enable signal, DCL3 enable signal, i.e. electric air conditioner 2 enable signal, and DCL4 enable signal, i.e. high-voltage fan enable signal.

6. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 5, characterized in that: include: The load contactors include: air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor; The interaction status of each load contactor includes: whether each load contactor is open, closed, stuck, and retained.

7. A method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle according to claim 6, characterized in that: include: Air pump operation information includes: air pump speed, air pump bus voltage, air pump output current, air pump controller temperature, air pump status, air pump fault code and air pump life signal; Oil pump operation information includes: oil pump speed, oil pump bus voltage, oil pump output current, oil pump controller temperature, oil pump status, oil pump fault code and oil pump life signal; DC-DC operation information includes: DCL1 input voltage, DCL1 output voltage, DCL1 output current, DC-DC heat sink temperature, DCL1 working status, DCL1 fault code and DC-DC life signal; The operating information of the electric air conditioner 1 includes: DCL2 input voltage, DCL2 output voltage, DCL2 output current, DCL2 radiator temperature, DCL2 control status, DCL2 fault code and DCL2 life signal; The operating information of the electric air conditioner 2 includes: DCL3 input voltage, DCL3 output voltage, DCL3 output current, DCL3 radiator temperature, DCL3 control status, DCL3 fault code and DCL3 life signal; The high-voltage fan operation information includes: DCL4 input voltage, DCL4 output voltage, DCL4 output current, DCL4 radiator temperature, DCL4 control status, DCL4 fault code and DCL4 life signal.

8. A system for implementing the method for fault diagnosis and display of an all-in-one integrated controller for a hydrogen fuel commercial vehicle as claimed in claim 7, characterized in that: The system comprises: A low-voltage detection module is used to connect the low-voltage electrical system of the all-in-one integrated controller to the vehicle's CAN bus after the all-in-one integrated controller detects that the vehicle's switch has been switched from OFF to ON. The all-in-one integrated controller internally detects the low-voltage electrical system to see if it has reported a fault. If so, the system is powered off for troubleshooting. The high-voltage detection module is used to switch the vehicle switch from the ON position to the START position to connect the high-voltage electrical system of the all-in-one integrated controller if there is no fault in the low-voltage electrical system, and detect whether the pre-charging is successful. If the pre-charging is successful, the high-voltage electrical system is internally detected in the all-in-one integrated controller. If the pre-charging is unsuccessful, the power is turned off for troubleshooting; The judgment contactor interaction module is used for the all-in-one integrated controller to send a power wake-up signal to the hydrogen fuel cell, battery 1 and battery 2. The hydrogen fuel cell, battery 1 and battery 2 respectively input high voltage electricity to the hydrogen fuel cell contactor, the battery 1 contactor and the battery 2 contactor, and communicate and interact with the VCU controller to pass the current of the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor. The VCU controller analyzes whether there is any abnormality in the current and displays the analysis result on the instrument; Input high voltage electricity to the fuse module, the hydrogen fuel cell contactor, battery 1 contactor and battery 2 contactor input high voltage electricity to the hydrogen fuel cell fuse, battery 1 fuse and battery 2 fuse respectively, and the hydrogen fuel cell fuse, battery 1 fuse and battery 2 fuse input high voltage electricity to the hydrogen fuel cell input module, battery 1 input module and battery 2 input module respectively; A feedback module, configured for the hydrogen fuel cell input module, the battery 1 input module, and the battery 2 input module to respectively feed back current data to the all-in-one integrated controller for hydrogen fuel commercial vehicles; A high-voltage electricity output module to the module, used for the all-in-one integrated controller to output high-voltage electricity to the air pump output module, the oil pump output module, the electric air conditioner 1 output module, the DC-DC output module, the electric air conditioner 2 output module and the high-voltage fan output module respectively; The module operation information sending module is used for the air pump output module, the oil pump output module, the electric air conditioner 1 output module, the DC-DC output module, the electric air conditioner 2 output module and the high-voltage fan output module to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the operation information of each load module to the VCU controller; Output high-voltage electricity module to the contactor, used for the air pump output module, oil pump output module, electric air conditioner 1 output module, DC-DC output module, electric air conditioner 2 output module and high-voltage fan output module to output high voltage electricity to the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor respectively; The contactor operation information sending module is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the interaction status of each load contactor to the VCU controller; A high-voltage electricity output module to the fuse is used for the air pump contactor, oil pump contactor, electric air conditioner 1 contactor, DC-DC contactor, electric air conditioner 2 contactor and high-voltage fan contactor to output high voltage electricity to the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse respectively; The load output module is used for the air pump fuse, oil pump fuse, electric air conditioner 1 fuse, DC-DC fuse, electric air conditioner 2 fuse and high-voltage fan fuse to output high voltage electricity to the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan respectively after receiving the high-voltage electrical signal; A load information sending module is used for the air pump, oil pump, electric air conditioner 1, DC-DC, electric air conditioner 2 and high-voltage fan to communicate and interact with the VCU controller after receiving the high-voltage electrical signal, and send the load operation information to the VCU controller; A comparison module is used for the high and low voltage board module of the all-in-one integrated controller to compare the direct output current of each load module with the current fed back by the VCU controller, compare the direct output current of each load contactor with the current fed back by the VCU controller, compare the direct output current of each load with the current of the VCU controller communication interaction, and compare the input current of each battery module with the current fed back by the VCU controller.

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