Controller for a vehicle-mounted hydrogen system

Abstract

The present invention relates to a controller of a vehicle-mounted hydrogen system, comprising a power supply circuit, a PWM drive circuit and a CAN communication circuit respectively connected to a processor; the PWM drive circuit is used to connect a PWM drive control type bottle mouth valve, and the bottom side or high side drive circuit connected to the CAN communication circuit is used to connect to the switch type bottle mouth valve. The controller is compatible with gas cylinder valves with different operating pressures in a 35MPa vehicle-mounted hydrogen storage / supply system and a 70MPa vehicle-mounted hydrogen storage / supply system, and meets the control signal transmission of a 35MPa switch type bottle valve and a 70MPa PWM type bottle valve.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell vehicles, and in particular to a controller of a vehicle-mounted hydrogen system. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The main energy source of hydrogen fuel cell vehicles is hydrogen. In vehicle-mounted hydrogen storage, gas cylinders are used as storage containers to store gaseous hydrogen through compression. At present, vehicle-mounted hydrogen storage bottles use forged aluminum alloy as the inner liner and carbon fiber coated gas cylinders as the main storage containers. The operating pressures are mainly 35MPa and 70MPa.

[0004] During use, due to the higher operating pressure of 70MPa gas cylinders, for safety reasons, the 70MPa gas cylinder mouth valve requires a high-frequency PWM drive to open the proportional valve, while the 35MPa gas cylinder does not require it; at the same time, the hydrogen concentration sensor installed at the bottle mouth has a variety of power supply voltages (such as 24V, 12V and 5V) and signal types (PWM signal, 0-5V voltage analog and 4-20mA current analog); and during the hydrogen refueling process, the hydrogen system controller installed at the hydrogen refueling port will monitor the temperature, pressure and hydrogen concentration of the gas cylinder to ensure that no leakage occurs (the hydrogen refueling process is accompanied by temperature and pressure increases, which will increase the probability of hydrogen leakage).

[0005] Therefore, different car models will use gas cylinders with different operating pressures, and the hydrogen concentration sensors they are equipped with also have different power supply voltages and signal types. The hydrogen system controller needs to maintain communication with the hydrogen refueling station during the hydrogen refueling process to ensure the safety of the hydrogen refueling process. As a result, the current hydrogen system controller is difficult to achieve compatibility with gas cylinders with different operating pressures, sensors with different power supply voltages and signal types, and thus it is difficult to achieve communication between the hydrogen refueling station and the on-board hydrogen system. Summary of the invention

[0006] In order to solve at least one technical problem existing in the above-mentioned background technology, the present invention provides a controller of an on-board hydrogen system, which can simultaneously meet the compatibility of sensor power supply voltage, sensor signal type and bottle valve control signal type involved in information collection, vehicle communication and hydrogen refueling process in 35MPa on-board hydrogen storage / supply system and 70MPa on-board hydrogen storage / supply system, thereby facilitating communication between the on-board hydrogen system and the hydrogen refueling station, thereby responding to the safety functions of the whole vehicle or fuel cell system for controlling hydrogen, fault detection and processing, etc.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A first aspect of the present invention provides a controller for a vehicle-mounted hydrogen system, comprising a power supply circuit, a PWM drive circuit and a CAN communication circuit respectively connected to a processor;

[0009] The PWM driving circuit is used to connect the PWM driving control type bottle mouth valve, and the bottom side or high side driving circuit connected to the CAN communication circuit is used to connect to the switch type bottle mouth valve.

[0010] The power supply circuit includes a 12V power supply circuit and a 5V power supply circuit. The 12V power supply circuit is used to connect with the PWM signal type hydrogen concentration sensor, and the 5V power supply circuit is used to connect with the active sensor and the passive sensor.

[0011] The processor is also connected to an analog input circuit, and the analog input circuit is used to connect active sensors and passive sensors.

[0012] The active sensor includes at least one of a pressure sensor or a voltage-type hydrogen concentration sensor.

[0013] The passive sensor is a resistance temperature sensor, and the passive sensor is communicatively connected with an infrared receiving module of a hydrogenation gun of a hydrogenation station.

[0014] The processor is connected to the infrared communication module via a serial communication circuit.

[0015] The processor receives the digital input signal through the digital input processing circuit.

[0016] The CAN communication circuit includes an external CAN communication circuit and an internal CAN communication circuit. The external CAN communication circuit is used to connect to the vehicle CAN communication network, and the internal CAN communication circuit is connected to the host computer.

[0017] The external CAN communication circuit is connected with the low-side or high-side driving circuit, and the low-side or high-side driving circuit is used to connect with the switch type bottle mouth valve.

[0018] A second aspect of the present invention provides a vehicle-mounted hydrogen system equipped with the above-mentioned controller; the vehicle-mounted hydrogen system includes a hydrogen system controller, an infrared communication unit and a fuel cell system connected by a wiring harness.

[0019] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0020] 1. The controller is compatible with gas cylinder valves with different operating pressures in 35MPa on-board hydrogen storage / supply systems and 70MPa on-board hydrogen storage / supply systems, and meets the control signal transmission of 35MPa switch type valves and 70MPa PWM type valves.

[0021] 2. The controller is compatible with the 12V power supply voltage platform and 24V power supply voltage platform required by the hydrogen concentration sensors with different signals in the vehicle-mounted hydrogen storage / supply system.

[0022] 3. The controller is compatible with the signal input of various hydrogen concentration sensors, including PWM signals, 0-5V voltage analog and 4-20mA current analog, to meet the compatibility issues of different types of hydrogen concentration sensors in different fuel cell vehicle models.

[0023] 4. The controller can send the hydrogen system information to the hydrogen filling station through infrared communication. The hydrogen filling station receives the hydrogen bottle pressure, temperature, and hydrogen leakage concentration information of the hydrogen system to determine the hydrogen filling rate or stop the hydrogen filling action, thereby improving the safety of the on-board hydrogen system during the hydrogen filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding 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 improper limitations on the present invention.

[0025] Figure 1 A schematic diagram of the structure of a vehicle-mounted hydrogen system controller provided by one or more embodiments of the present invention;

[0026] Figure 2 A schematic diagram of the structure of a vehicle-mounted hydrogen system provided for one or more embodiments of the present invention;

[0027] Figure 1 In: 1. Processor, 2. Power supply circuit, 3. 5V regulated power supply circuit, 4. Active sensor, 5. Passive sensor, such as resistance temperature sensor, 6. Analog input circuit, 7. 12V regulated power supply circuit, 8. PWM signal type hydrogen concentration sensor, 9. PWM signal processing circuit, 10. Digital input signal, 11. Digital input processing circuit, 12. Infrared communication module, 13. Serial communication circuit, 14. Infrared receiving module of hydrogen filling gun of hydrogen filling station, 15. PWM drive control type bottle mouth valve, 16. PWM drive circuit, 17. Switch type bottle mouth valve, 18. Low side or high side drive circuit, 19. Vehicle CAN communication network, 20. External CAN communication circuit, 21. Host computer, 22. Internal CAN communication circuit;

[0028] Figure 2 In: 101, hydrogen system controller, 102, hydrogen system wiring harness, 103, high-pressure hydrogen storage bottle, 104, integrated bottle mouth valve, 105, pressure sensor, 106, pressure reducing valve, 107, switch valve, 108, infrared communication unit, 109, fuel cell system or vehicle control system, 1010, one-way stop valve, 1011, hydrogen filling port, 1012, hydrogen concentration sensor. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] As described above, different types of fuel cell vehicles will use gas cylinders with different operating pressures, and the hydrogen concentration sensors they are equipped with also have different power supply voltages and signal types. The hydrogen system controller needs to maintain communication with the hydrogen refueling station during the hydrogen refueling process to ensure the safety of the hydrogen refueling process. As a result, the current hydrogen system controller is difficult to achieve compatibility with gas cylinders with different operating pressures, sensors with different power supply voltages and signal types, and thus it is difficult to achieve communication between the hydrogen refueling station and the on-board hydrogen system.

[0033] Therefore, the following embodiment provides a controller for a vehicle-mounted hydrogen system, which can simultaneously meet the functions of information collection of a 35MPa vehicle-mounted hydrogen storage / supply system and a 70MPa vehicle-mounted hydrogen storage / supply system, vehicle communication, sending information of the hydrogen system to a hydrogen filling station during hydrogen filling, responding to control of hydrogen by the vehicle or fuel cell system, fault detection and processing, and the like.

[0034] Embodiment 1:

[0035] like Figure 1 As shown, the purpose of this embodiment is to provide a controller for a vehicle-mounted hydrogen system, including a power supply circuit 2, an analog input circuit 6, a PWM signal processing circuit 9, a digital input processing circuit 11, a serial communication circuit 13, a PWM drive circuit 16 and a CAN communication circuit respectively connected to a processor 1;

[0036] The power supply circuit 2 is connected to the PWM signal type hydrogen concentration sensor 8 via the 12V voltage-stabilized power supply circuit 7, and the PWM signal type hydrogen concentration sensor 8 is connected to the processor 1 via the PWM signal processing circuit 9;

[0037] The power supply circuit 2 is connected to the active sensor 4 and the passive sensor 5 respectively through the 5V voltage-stabilized power supply circuit 3. The active sensor 4 and the passive sensor 5 are both connected to the processor 1 through the analog input circuit 6. The passive sensor 5 is also connected to the infrared receiving module 14 of the hydrogenation gun of the hydrogenation station.

[0038] The processor 1 is connected to the infrared communication module 12 via the serial communication circuit 13, and is connected to the PWM drive control type bottle mouth valve 15 via the PWM drive circuit 16;

[0039] The processor 1 receives a digital input signal 10 through a digital input processing circuit 11;

[0040] The CAN communication circuit includes an external CAN communication circuit 20 and an internal CAN communication circuit 22. The external CAN communication circuit 20 is connected to the switch-type bottle mouth valve 17 through a low-side or high-side driving circuit 18. The external CAN communication circuit 20 is also used to connect to the vehicle CAN communication network 19.

[0041] The internal CAN communication circuit 22 is used to connect to the host computer 21 .

[0042] An active sensor refers to a sensor that converts non-electrical energy into electrical energy, and only converts the energy itself, but not the energy signal. It is called an active sensor, also called an energy conversion sensor or transducer. In this embodiment, it can be a pressure sensor or a voltage-type hydrogen concentration sensor or other devices.

[0043] The passive sensor may be a resistance temperature sensor in this embodiment.

[0044] The details are as follows:

[0045] According to the functions that the high-voltage on-board hydrogen system controller needs to complete, the hydrogen system controller circuit board hardware includes MCU chip circuit, power supply circuit for chip and sensor, analog input circuit, serial communication circuit, switch input circuit, PWM drive output circuit, low-side or high-side drive circuit, and CAN communication circuit.

[0046] The main control MCU chip circuit is the core of the hardware system, requiring a low-power, wide-voltage range automotive-grade high-performance microprocessor, including the MCU's minimum circuit and information storage module, capable of collecting and processing various switch signals, sensor signals, etc., capable of implementing complex control strategies, and able to store information such as accumulated hydrogen consumption after power-off.

[0047] The power circuit module converts the 24V or 12V of the vehicle battery to 5V, 3.3V, 1.3V, and 12V to power each circuit module of the system. Among them, 3.3V and 1.3V are used to power the main control chip MCU, and the 5V power supply is used to power each subsystem and analog sensor, including the pressure sensor and the analog hydrogen concentration sensor. The 12V power supply is used to power the 12V hydrogen concentration sensor.

[0048] It should be noted that the hydrogen concentration sensors used in vehicles include 24V power supply, 12V power supply (such as Japan's FIS hydrogen concentration sensor) and 5V power supply, and their signal forms include PWM signals, 0-5V voltage analog quantities and 4-20mA current analog quantities.

[0049] Therefore, in this embodiment, the input voltage range of the hydrogen concentration sensor power supply is 9-32V. If a 12V hydrogen concentration sensor is connected under a 24V system, the power supply of the hydrogen concentration sensor is provided by the controller. If a 24V hydrogen concentration sensor is connected, the power supply of the hydrogen concentration sensor and the power supply of the hydrogen controller can be the same power supply, that is, the voltage range output by the power circuit module is 9-32V, so the controller is compatible with 12V and 24V systems.

[0050] The power circuit has an anti-reverse connection function. In automotive applications, a wiring harness often wraps more than a dozen or even dozens of wires and there is a situation where the battery is connected in reverse. If there is no anti-reverse connection protection circuit, it is easy to cause damage to the controller, so an anti-reverse connection circuit must be designed. In DC circuit applications, there are two forms of anti-reverse connection circuits: diodes and MOS tubes. The diode anti-reverse connection circuit uses the unidirectional conductivity of the diode, so it cannot be used in high current situations; while the anti-reverse connection circuit using the MOS tube conduction and cutoff principle can meet the needs of high current.

[0051] The switch input (DI) circuit, the controller is used in a 24V system, the input signal is also 24V, and the microcontroller pin is 3.3V, so it is necessary to design a conversion circuit, overvoltage and overcurrent protection. The conversion circuit of the switch quantity acquisition adopts the principle of resistor voltage division to realize the conversion of high voltage signals into low level signals; for overvoltage protection, a diode is used for clamping. The switch input includes the activation voltage of the controller, the manual replacement signal of the physical line, the hydrogenation switch signal, the emergency pipe valve signal, etc.

[0052] The analog input circuit (AI) selects 10-bit precision analog acquisition and is designed with a filtering circuit. The analog input signals include the hydrogen bottle pressure signal, the pressure signal after the pressurization valve, the hydrogen concentration signal, the temperature signal of each high-pressure hydrogen bottle, etc.

[0053] The PWM input circuit is used to collect the PWM waveform emitted by the hydrogen concentration sensor. The hydrogen concentration needs to be calculated based on the duty cycle of the signal. The method for calculating the duty cycle of the PWM signal is as follows:

[0054] Three timer modules are used. The first timer is a general timer that starts counting from 0. The second timer is a capture counter and is connected to port A (A is any port that can be configured for this timer). When the timer captures a rising edge on port A, the value of the general timer is captured and the general timer is reset. The third timer is also a capture timer and is connected to port A, but its function is only to capture the value of the general timer when a falling edge is detected on the port. The value captured by the third timer divided by the value captured by the second timer is the duty cycle of the collected signal, which is encapsulated in the underlying driver for easy application layer calls.

[0055] The PWM drive circuit is used to control the switch of the 70MPa integrated bottle mouth valve. The proportional valve in the bottle mouth valve is driven by a PWM high-frequency switch signal with driving capability to achieve the purpose of opening the valve. The circuit uses a high-frequency output chip with a maximum frequency of 100kHz and can collect output current. At the moment of controlling the bottle valve to open, the current can be controlled at 3A. After the bottle valve is opened, the output current is controlled to be about 1A. The collected current is used as feedback and is also the input variable of PID control, which can accurately control the current of the pin. The 35MPa hydrogen bottle mouth valve relay can also be directly controlled by setting a 100% duty cycle.

[0056] The controller circuit board is also equipped with a low-side or high-side drive circuit to control the switch of the 35MPa bottle-mouth valve. The 35MPa bottle-mouth valve is controlled in a similar way to a relay. If the front end of the relay is connected to 24V power, the rear end of the relay is connected to the low-side drive of the controller to open the 35MPa bottle-mouth valve. If the front end of the relay is grounded, the rear end of the relay is connected to the high-side drive of the controller to open the 35MPa bottle-mouth valve.

[0057] The controller circuit board allocates corresponding pins to the low-side or high-side drive circuit and the PWM drive circuit during manufacturing.

[0058] The controller has a serial communication circuit, which can be used to update the program and debug through the serial port through the pin configuration. It can also exchange information with the infrared communication module through the serial port, transmit the hydrogen system information to the infrared communication module through the serial port, and the infrared communication module conducts infrared communication with the hydrogen filling gun of the hydrogen filling station.

[0059] The system has a separate infrared communication module installed at the hydrogen filling port, which communicates with the circuit board of the controller through a serial port line. The power supply of the infrared communication model is powered by the 5V regulated power supply of the controller.

[0060] The circuit board has two CAN communication channels. The MCU has a CAN controller module. The NXP CAN transceiver is suitable for 12V or 24V systems. It has good electromagnetic compatibility and good ESD protection performance. The CAN module must comply with the CAN2.0B communication interface standard and meet the SAEJ1939 protocol requirements to achieve data interaction. The system status can be viewed, diagnosed, and debugged through CAN. The system detection information can also be judged and stored to prevent power-off data loss.

[0061] The peripheral modules of the MCU chip used in the development of the bottom-level driver of the hydrogen system controller are ADC, GPTA, MultiCAN, Port, and STM. The ADC module is mainly used to collect sensor signals, including hydrogen pressure and temperature. The MultiCAN+ module contains 3 CAN nodes, which can work independently or exchange data and remote frames through the gateway function. When a node (station) on the CAN bus sends data, it is broadcast to all nodes in the network in the form of a message. CAN frames are sent and received according to the CAN V2.0B specification, with a maximum communication rate of 1Mbit / s.

[0062] The application layer software is responsible for the development of control logic and is generated by the SIMULINK model. The application layer is divided into three modules: input module, calculation execution module, and output module. The input module is divided into CAN signal input and hardware input (including sensor signals and IO signals). The calculation execution module includes functions such as bottle temperature calculation, pressure calculation, hydrogen concentration calculation, HMS controller state calculation, and hydrogen bottle SOC estimation. The output module is for the transmission of CAN messages and the switching action of the bottle valve.

[0063] The hydrogen system controller also has corresponding host computer software, which can display the hydrogen bottle pressure, hydrogen bottle temperature, hydrogen leakage concentration, fault information, and bottle valve status. The host computer has developed a manual mode, which has the functions of individually controlling the bottle valve and calibrating the hydrogen consumption value.

[0064] The controller of the above-mentioned on-vehicle hydrogen system is compatible with a 12V power supply voltage platform and a 24V power supply voltage platform.

[0065] The controller is suitable for 35MPa vehicle-mounted hydrogen storage / supply system and 70MPa vehicle-mounted hydrogen storage / supply system. It can control a variety of bottle valves, including 35MPa switch-type bottle valves and 70MPa bottle valves with multiple frequency inputs. The input frequency range is 100Hz-500kHz.

[0066] The controller is compatible with the signal input of various hydrogen concentration sensors, including PWM signals, 0-5V voltage analog and 4-20mA current analog, meeting the compatibility issues of different types of hydrogen concentration sensors in different fuel cell vehicle models.

[0067] The controller can send hydrogen system information to the hydrogen refueling station through infrared communication. The hydrogen refueling station receives the hydrogen bottle pressure, temperature, and hydrogen leakage concentration information of the hydrogen system to determine the hydrogen refueling rate or stop the hydrogen refueling action, thereby improving the safety of the on-board hydrogen system during the hydrogen refueling process.

[0068] Embodiment 2:

[0069] like Figure 2 As shown, the purpose of this embodiment is to provide a vehicle-mounted hydrogen system, which is equipped with the controller in Embodiment 1.

[0070] The vehicle-mounted hydrogen system includes a hydrogen system controller 101, an infrared communication unit 108 and a fuel cell system 109 (it can also be a vehicle control system, depending on the different vehicle models, the batteries in some vehicle models have a separate control system) connected through a hydrogen system wiring harness 102. The hydrogen system controller 101 is the controller in Example 1.

[0071] The hydrogen system controller 101 is connected to the hydrogen concentration sensor 1012 , the temperature sensor and the pressure sensor 105 .

[0072] The fuel cell system 109 is connected to at least one set of high-pressure hydrogen storage bottles 103 via pipelines. The high-pressure hydrogen storage bottles 103 have integrated bottle mouth valves 104 . A pressure sensor 105 , a pressure reducing valve 106 and a switch valve 107 are provided on the pipelines.

[0073] A one-way stop valve 1010 and a hydrogenation port 1011 are also provided on the pipeline.

[0074] The pin usage of the hydrogen system controller 101 is shown in Table 1:

[0075] Table 1: Pin usage of hydrogen system controller

[0076]

[0077] The above-mentioned on-vehicle hydrogen system is compatible with 12V power supply voltage platform and 24V power supply voltage platform.

[0078] It is suitable for 35MPa vehicle-mounted hydrogen storage / supply system and 70MPa vehicle-mounted hydrogen storage / supply system, and can control a variety of bottle valves, including 35MPa switch-type bottle valves and 70MPa bottle valves with multiple frequency inputs, with an input frequency range of 100Hz-500kHz.

[0079] Compatible with the signal input of various hydrogen concentration sensors, including PWM, 0-5V voltage analog, and 4-20mA current analog. The controller connects to different pins according to different sensor types, and correspondingly, various sensors also have reserved pins for connection. When the controller is manufactured, the wiring harness diagram of the controller is designed according to the type of sensor, and different sensors are connected to different pins on the wiring harness diagram.

[0080] The hydrogen system information can be sent to the hydrogen filling station through infrared communication. The hydrogen filling station receives the hydrogen bottle pressure, temperature, and hydrogen leakage concentration information of the hydrogen system to determine the hydrogen filling rate or stop the hydrogen filling action.

[0081] It can accurately calculate the remaining hydrogen mass and use the storage chip of the controller to calculate the cumulative hydrogen consumption. The corresponding host computer can calibrate the hydrogen consumption and manually control a single bottle valve.

[0082] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A controller for a vehicle-mounted hydrogen system, characterized in that: It includes a power supply circuit, a PWM drive circuit and a CAN communication circuit respectively connected to the processor; The PWM drive circuit is used to connect to the PWM drive control type bottle mouth valve, and the low side or high side drive circuit connected to the CAN communication circuit is used to connect to the switch type bottle mouth valve; The PWM drive circuit is used to control the switch of the 70MPa integrated bottle mouth valve; the low-side or high-side drive circuit controls the switch of the 35MPa bottle mouth valve; the 35MPa bottle mouth valve is controlled by a relay. If the front end of the relay is connected to 24V power, the rear end of the relay is connected to the low-side drive of the controller to open the 35MPa bottle mouth valve; if the front end of the relay is grounded, the rear end of the relay is connected to the high-side drive of the controller to open the 35MPa bottle mouth valve; The processor is also connected to an analog input circuit, which is used to connect an active sensor and a passive sensor; the processor is connected to an infrared communication module via a serial communication circuit; the passive sensor is connected to an infrared receiving module of a hydrogenation gun of a hydrogenation station; The processor receives a digital quantity input signal through a digital quantity input processing circuit; The CAN communication circuit includes an external CAN communication circuit and an internal CAN communication circuit, the external CAN communication circuit is used to connect to the vehicle CAN communication network, and the internal CAN communication circuit is connected to the host computer; The external CAN communication circuit is connected to a low-side or high-side drive circuit, and the low-side or high-side drive circuit is used to connect to a switch-type bottle mouth valve; The power supply circuit includes a 12V power supply circuit and a 5V power supply circuit, the 12V power supply circuit is used to connect with the PWM signal type hydrogen concentration sensor, and the 5V power supply circuit is used to connect with the active sensor and the passive sensor; The power circuit module realizes the conversion of different voltages from the vehicle battery; when a 12V hydrogen concentration sensor is connected to a 24V system, the power supply of the hydrogen concentration sensor is provided by the controller, and when a 24V hydrogen concentration sensor is connected, the power supply of the hydrogen concentration sensor and the power supply of the hydrogen controller can be the same power supply, so the controller is compatible with both 12V and 24V systems.

2. The controller of a vehicle-mounted hydrogen system according to claim 1, characterized in that: The active sensor includes at least one of a pressure sensor or a voltage-type hydrogen concentration sensor.

3. The controller of a vehicle-mounted hydrogen system according to claim 1, characterized in that: The passive sensor is a resistance temperature sensor.

4. A vehicle-mounted hydrogen system, comprising a fuel cell system, an infrared communication unit and a hydrogen system controller as claimed in any one of claims 1 to 3 connected by a wiring harness.

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