70 MPa hydrogen storage system controller

Abstract

The utility model provides a 70 MPa hydrogen storage system controller. The 70 MPa hydrogen storage system controller comprises a main control unit, a DCDC module, an AD acquisition module, an I / O signal acquisition module, a CAN communication module, a relay control module and an EEPROM storage module. Wherein the DCDC module is used for converting a 9-28V power supply of a whole vehicle into a 5V power supply for a sensor to use and converting the 9-28V power supply of the whole vehicle into a 12V power supply for a bottleneck valve to use; the AD acquisition module is used for acquiring hydrogen pressure, voltage, current and temperature signals and uploading various acquired signals to the main control unit in real time; the 70 MPa hydrogen storage system controller provided by the utility model integrates multiple functions of intelligent control of a high pressure resistant bottleneck valve, a closed-loop control strategy, abnormal working condition diagnosis and protection, voltage conversion and stable power supply, safety monitoring and communication in a hydrogenation process, hydrogen leakage detection and alarm and the like; the safety, the stability and the reliability of the high-pressure hydrogen storage system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage, and particularly to a 70 MPa hydrogen storage system controller. Background Technique

[0002] With the rapid development of clean energy technology, hydrogen energy, as an important part of the future energy system, its storage and utilization technologies have attracted increasing attention. In the field of hydrogen energy applications, high-pressure hydrogen storage systems, especially 70 megapascals (MPa) hydrogen storage systems, are regarded as ideal hydrogen storage solutions for long-distance transportation vehicles (such as heavy trucks, buses, etc.) due to their high energy density and significant storage efficiency. However, at present, there is still a lack of a mature control system for hydrogen storage systems at this high pressure level in China, and many technical problems need to be solved urgently.

[0003] I. Control Difficulties of High-Pressure-Resistant Bottle Neck Valves

[0004] The high-pressure-resistant bottle neck valve adopted by the 70 MPa hydrogen storage system requires a large amount of energy to open, and the coil power needs to reach 30 W to ensure the smooth opening of the valve. However, continuous power supply at this power will cause the coil temperature to be too high (exceeding 120 °C), which will damage the bottle neck valve. Therefore, an intelligent duty cycle control method needs to be designed, that is, the power is quickly reduced to 10 W after the valve is opened to maintain its open state, while avoiding abnormal closing of the valve caused by too low power. In addition, the problem of coil internal resistance change caused by temperature change also needs to be solved to ensure the accuracy and stability of control.

[0005] II. Application of Closed-Loop Control Strategy

[0006] Considering the inevitability of temperature change during the long-term operation of the bottle neck valve and its influence on the coil internal resistance, the hydrogen storage system controller needs to adopt a closed-loop control strategy. By real-time monitoring of the supply current and dynamically adjusting the duty cycle according to the current magnitude, precise control of power can be achieved to ensure the stable operation of the bottle neck valve.

[0007] III. Fault Diagnosis and Protection under Abnormal Conditions

[0008] During the vehicle operation, abnormal withdrawal of the wire harness connector pins may cause short circuit or open circuit of the bottle neck valve, seriously affecting the vehicle's cruising range. Therefore, the hydrogen storage system controller needs to have the ability to detect the voltage and current at both ends of the bottle neck valve, so as to timely detect and report open circuit or short circuit faults and remind the driver to carry out maintenance.

[0009] IV. Voltage Conversion and Stable Power Supply

[0010] In view of the fact that the vehicle low-voltage power system of heavy trucks, buses and other models is 24V, while the bottle valve requires a 12V power supply, a step-down DC-DC converter needs to be integrated inside the hydrogen storage system controller to achieve precise voltage conversion and stable power supply, ensuring the normal operation of the bottle valve.

[0011] V. Safety Monitoring and Communication during the Hydrogen Refueling Process

[0012] During the hydrogen refueling process, the temperature of the hydrogen gas inside the bottle will rise sharply. Therefore, it is necessary to detect the temperature of the hydrogen gas inside the gas cylinder in real time and report the temperature information to the hydrogen refueling station through the infrared communication module. The hydrogen refueling station dynamically adjusts the hydrogen refueling speed based on the received temperature data to ensure the safe and efficient hydrogen refueling process. In addition, to meet the independent wake-up requirements during the hydrogen refueling process, the hydrogen storage system controller needs to have a hydrogen refueling wake-up function isolated from the vehicle wake-up, support communication with the infrared communication module at the same time, and the communication content needs to comply with the SAE2799 hydrogen refueling protocol standard.

[0013] VI. Hydrogen Leak Detection and Alarm

[0014] In view of the high-pressure characteristics and potential safety risks of the 70MPa hydrogen storage system, a hydrogen concentration leak alarm needs to be used for real-time monitoring. Considering the diversity of the alarm output signals in the market (such as analog signals, 5VPWM signals, 12VPWM signals, etc.), the hydrogen storage system controller needs to have the ability to be compatible with various signal types, accurately detect the working state and alarm information of the alarm, and take timely measures to prevent safety accidents.

[0015] In summary, aiming at the problems faced by the 70MPa hydrogen storage system, this application aims to provide a hydrogen storage system controller that integrates multiple functions such as intelligent control of high-pressure-resistant bottle valves, closed-loop control strategies, abnormal condition diagnosis and protection, voltage conversion and stable power supply, safety monitoring and communication during the hydrogen refueling process, and hydrogen leak detection and alarm, so as to improve the safety, stability and reliability of the high-pressure hydrogen storage system. Summary of the Utility Model

[0016] The purpose of this utility model is to solve the problems raised in the background technology, and provides a 70 MPa hydrogen storage system controller.

[0017] The specific technical solutions are as follows:

[0018] A 70 MPa hydrogen storage system controller includes:

[0019] The main control unit;

[0020] A DCDC module for converting the vehicle 9-28V power supply to 5V for sensor use and for converting the vehicle 9-28V power supply to 12V for the bottle valve use;

[0021] AD acquisition module for collecting hydrogen pressure, voltage, current and temperature signals;

[0022] I / O signal acquisition module for real-time collecting hydrogen concentration in the environment of 70MPa hydrogen storage system;

[0023] CAN communication module for providing communication path;

[0024] Relay control module for output control;

[0025] EEPROM storage module for storing calibration information;

[0026] Wherein, the main control unit is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module and the EEPROM storage module respectively.

[0027] As a preferred solution of the present invention, the main control unit includes a controller and a connector. The controller is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module and the EEPROM storage module respectively through the connector. The controller is communicatively connected to the hydrogen filling station through an infrared communication module.

[0028] As a preferred solution of the present invention, the DCDC module includes a DC-DC converter one for converting the vehicle 9-28V power supply into 5V and a DC-DC converter two for converting the vehicle 9-28V power supply into 12V. The input ends of the DC-DC converter one and the DC-DC converter two are both connected to the output end of the vehicle 9-28V power supply.

[0029] As a preferred solution of the present invention, the AD acquisition module includes a hydrogen pressure sensor, a voltage sensor, a current sensor and a temperature sensor. The hydrogen pressure sensor is fixedly installed in the hydrogen storage cylinder. The voltage sensor and the current sensor are both connected to the input power supply of the bottle mouth valve of the hydrogen storage cylinder. The temperature sensor is installed on the bottle mouth valve of the hydrogen storage cylinder. The power supply ends of the hydrogen pressure sensor, the voltage sensor, the current sensor and the temperature sensor are respectively connected to the output end of the DC-DC converter one, and the signal output ends of the hydrogen pressure sensor, the voltage sensor, the current sensor and the temperature sensor are respectively communicatively connected to the signal input end of the controller through the connector.

[0030] As a preferred embodiment of the present utility model, the I / O signal acquisition module includes a hydrogen concentration sensor, which is arranged on the outer periphery of the hydrogen storage cylinder. The power supply end of the hydrogen concentration sensor is connected to the output end of the DC-DC converter I, and the signal output end of the hydrogen concentration sensor is communicatively connected to the signal input end of the controller through the connector.

[0031] As a preferred embodiment of the present utility model, the CAN communication module has two CAN communication channels. The controller communicates with the internal devices of the fuel cell stack system and the debugging host computer through one of the CAN communication channels, and the controller communicates with the external vehicle signals through the other CAN communication channel.

[0032] As a preferred embodiment of the present utility model, the relay control module includes a fuel cell stack water pump relay, a fuel cell stack fan relay, and a main negative relay. The fuel cell stack water pump relay is connected in series with the fuel cell stack water pump, the fuel cell stack fan relay is connected in series with the fuel cell stack fan, the main negative relay is connected in series between the battery pack and the vehicle electrical system, and the electrical control ends of the fuel cell stack water pump relay, the fuel cell stack fan relay, and the main negative relay are all electrically connected to the control output end of the controller through the connector.

[0033] As a preferred embodiment of the present utility model, an alarm is further included. The alarm is an audible and visual alarm, and the electrical control end of the alarm is electrically connected to the control output end of the controller through the connector.

[0034] The present utility model has the following beneficial effects:

[0035] The 70 MPa hydrogen storage system controller provided by the present utility model integrates multiple functions such as intelligent control of high-pressure resistant bottle valves, closed-loop control strategies, abnormal condition diagnosis and protection, voltage conversion and stable power supply, safety monitoring and communication during the hydrogen refueling process, and hydrogen leakage detection and alarm, so as to improve the safety, stability, and reliability of the high-pressure hydrogen storage system. Description of the Drawings

[0036] Figure 1 It is the electrical connection block diagram of the 70 MPa hydrogen storage system controller provided by the embodiment of the present utility model;

[0037] Figure 2 It is the electrical connection principle of the 70 MPa hydrogen storage system controller provided by the embodiment of the present utility model Figure 1 ;

[0038] Figure 3 It is the electrical connection principle of the 70 MPa hydrogen storage system controller provided by the embodiment of the present utility model Figure 2 。 Detailed Embodiments

[0039] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0040] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to this patent; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0041] In the accompanying drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation to this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0042] In the description of the present utility model, unless otherwise clearly defined and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] Embodiment

[0044] The 70 MPa hydrogen storage system controller provided in this embodiment, as Figures 1 - 3 shown, includes: a main control unit, a DCDC module, an AD acquisition module, an I / O signal acquisition module, a CAN communication module, a relay control module, and an EEPROM storage module.

[0045] Among them, the DCDC module is used to convert the vehicle's 9 - 28V power supply to 5V for the use of sensors and to convert the vehicle's 9 - 28V power supply to 12V for the use of the bottle valve;

[0046] Among them, the AD acquisition module is used to collect hydrogen pressure, voltage, current, and temperature signals, and upload various collected signals to the main control unit in real time;

[0047] Among them, the I / O signal acquisition module is used to collect the hydrogen concentration in the environment of the 70 MPa hydrogen storage system in real time, and upload the collected hydrogen concentration data to the main control unit in real time;

[0048] Among them, the CAN communication module is used to provide a communication path, enabling the main control unit to communicate with the internal devices of the fuel cell stack system and the debugging host computer, and at the same time communicate with the external vehicle signals;

[0049] Among them, the relay control module is used for output control;

[0050] Among them, the EEPROM storage module is used to store calibration information, and the stored calibration information will not be lost when the power is off. For example, the EEPROM storage module can select EEPROM storage modules with models such as AT24C128, AT24C256, AT24C512, EV24C128A, EV24C256A, and EV24C512A.

[0051] Among them, the main control unit is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module, and the EEPROM storage module respectively.

[0052] Specifically, in this embodiment, the main control unit includes a controller and a connector. The controller is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module, and the EEPROM storage module respectively through the connector. The controller is communicatively connected to the hydrogen refueling station through an infrared communication module. For example, the controller can select a single-chip microcomputer with the model of STC89C51, the infrared communication module can select an infrared communication module with the model of YS-IRTM or HX1838, and the connector can select a connector with the model of 1393436-1.

[0053] Specifically, in this embodiment, the DCDC module includes a DC-DC converter one for converting the vehicle 9-28V power supply to 5V and a DC-DC converter two for converting the vehicle 9-28V power supply to 12V. The input ends of the DC-DC converter one and the DC-DC converter two are both connected to the output end of the vehicle 9-28V power supply.

[0054] For example, the model of the DC-DC converter one can be AH8690, and the model of the DC-DC converter two can be TEI132476IOOO1.

[0055] Specifically, in this embodiment, the AD acquisition module includes a hydrogen pressure sensor, a voltage sensor, a current sensor, and a temperature sensor. The hydrogen pressure sensor is fixedly installed inside the hydrogen storage cylinder. The voltage sensor and the current sensor are both connected to the input power supply of the bottle valve of the hydrogen storage cylinder. The temperature sensor is installed on the bottle valve of the hydrogen storage cylinder. The power supply terminals of the hydrogen pressure sensor, the voltage sensor, the current sensor, and the temperature sensor are respectively connected to the output terminal of the DC-DC converter 1. Moreover, the signal output terminals of the hydrogen pressure sensor, the voltage sensor, the current sensor, and the temperature sensor are all communicatively connected to the signal input terminal of the controller through connectors.

[0056] For example, the model of the hydrogen pressure sensor can be AST2000H2316L or AST4000; the model of the voltage sensor can be SDV-FH2T; the model of the current sensor can be the CSH-CT series; the temperature sensor can be the TS105-6 infrared temperature sensor.

[0057] Specifically, in this embodiment, the I / O signal acquisition module includes a hydrogen concentration sensor. The hydrogen concentration sensor is arranged on the outer periphery of the hydrogen storage cylinder. The power supply terminal of the hydrogen concentration sensor is connected to the output terminal of the DC-DC converter 1. Moreover, the signal output terminal of the hydrogen concentration sensor is communicatively connected to the signal input terminal of the controller through a connector, and is used to detect whether the hydrogen storage cylinder leaks hydrogen. For example, the hydrogen concentration sensor can select a hydrogen concentration sensor with the model of FH2-HY04.

[0058] Specifically, in this embodiment, the CAN communication module has two CAN communication channels. The controller communicates with the internal devices of the fuel cell stack system and the debugging host computer through one CAN communication channel, and the controller communicates with the external vehicle signals through the other CAN communication channel.

[0059] Specifically, in this embodiment, the relay control module includes a fuel cell stack water pump relay, a fuel cell stack fan relay, and a main negative relay. The fuel cell stack water pump relay is connected in series with the fuel cell stack water pump. The fuel cell stack fan relay is connected in series with the fuel cell stack fan. The main negative relay is connected in series between the battery pack and the vehicle electrical system. Moreover, the electronic control terminals of the fuel cell stack water pump relay, the fuel cell stack fan relay, and the main negative relay are all electrically connected to the control output terminal of the controller through connectors.

[0060] Specifically, in this embodiment, an alarm is further included. The alarm is an audible and visual alarm. The electronic control terminal of the alarm is electrically connected to the control output terminal of the controller through a connector. This alarm can be powered by the DC-DC converter 1.

[0061] In summary, the 70 MPa hydrogen storage system controller provided by this embodiment has the following advantages:

[0062] Technical effects

[0063] The 70 MPa hydrogen storage system controller provided in this embodiment integrates multiple functional modules, aiming to solve the technical problems in aspects such as control, safety, communication, and monitoring of high-pressure hydrogen storage systems. The specific technical effects include:

[0064] Intelligent control: Through the duty cycle control method, precise control of the high-pressure resistance bottle valve is achieved, which not only ensures the smooth opening of the valve but also avoids damage caused by coil overheating, improving the reliability and durability of the system.

[0065] Closed-loop control strategy: The supply current is monitored in real time, and the duty cycle is dynamically adjusted to ensure the stable operation of the bottle valve at different temperatures, improving the control accuracy and stability of the system.

[0066] Fault diagnosis and protection: It has the ability to detect the voltage and current at both ends of the bottle valve, promptly discovers and reports open or short circuit faults, providing a strong guarantee for the safe operation of the vehicle.

[0067] Voltage conversion and stable power supply: An integrated buck DC-DC converter is used to achieve precise conversion of the vehicle's low-voltage electrical system to the required voltage for the bottle valve and stable power supply, ensuring the normal operation of each component of the system.

[0068] Safety monitoring and communication during the hydrogen refueling process: The internal hydrogen temperature of the gas cylinder is detected in real time through the infrared communication module and reported to the hydrogen refueling station, supporting independent wake-up during the hydrogen refueling process and communication compliant with the SAE2799 standard, ensuring the safe and efficient hydrogen refueling process.

[0069] Hydrogen leakage detection and alarm: A hydrogen concentration leakage alarm compatible with multiple signal types can accurately detect and report leakage information, and take timely measures to prevent safety accidents.

[0070] Working principle

[0071] Power conversion: The DCDC module converts the wide-range voltage (9 - 28V) provided by the vehicle into the required 5V and 12V voltages for the system, and supplies them to components such as sensors and the bottle valve respectively.

[0072] Data acquisition:

[0073] The AD acquisition module real-time collects various parameters of the hydrogen storage system through hydrogen pressure sensors, voltage sensors, current sensors, and temperature sensors.

[0074] The I / O signal acquisition module real-time detects the hydrogen concentration in the environment of the hydrogen storage system through the hydrogen concentration sensor.

[0075] Data processing and communication:

[0076] The main control unit receives data from the AD acquisition module and the I / O signal acquisition module, and processes and analyzes it.

[0077] The CAN communication module realizes the communication between the main control unit and external devices (such as internal devices of the stack system, debugging host computer, external vehicle signals).

[0078] Control output:

[0079] The relay control module controls the on / off of the stack water pump relay, stack fan relay and main negative relay according to the instructions of the main control unit, and realizes the control of system components.

[0080] When an abnormal situation is detected, the controller controls the alarm to emit an audible and visual alarm signal.

[0081] Safety monitoring and protection:

[0082] The power supply current and temperature of the bottle valve are monitored in real time, and the duty cycle is adjusted through a closed-loop control strategy to ensure the stable operation of the bottle valve.

[0083] The hydrogen concentration and the hydrogen temperature in the bottle are detected in real time, abnormal situations are reported in a timely manner, and corresponding measures are taken to prevent the occurrence of safety accidents.

[0084] Among them, Figures 2 - 3 This is the electrical connection schematic diagram of the 70 MPa hydrogen storage system controller provided by this embodiment, which is connected to four groups of hydrogen storage cylinders at the same time.

[0085] Workflow

[0086] System power-on: After the vehicle power supply is turned on, the DCDC module starts to work and converts the power supply into the 5V and 12V voltages required by the system.

[0087] Data acquisition and upload:

[0088] The AD acquisition module and the I / O signal acquisition module start to acquire various parameters of the hydrogen storage system and the hydrogen concentration, and upload the data to the main control unit in real time.

[0089] Data processing and decision-making: The main control unit receives the data, processes and analyzes it, and generates corresponding control instructions according to the preset control logic and algorithms.

[0090] Control output and communication:

[0091] The relay control module controls the on / off of system components according to the control instructions.

[0092] The CAN communication module transmits the control instructions and status information to external devices and receives the feedback signals from external devices.

[0093] Safety monitoring and alarm:

[0094] Monitor the supply current and temperature of the bottle neck valve in real time, and adjust the duty cycle through a closed-loop control strategy.

[0095] Detect the hydrogen concentration and the hydrogen temperature inside the bottle in real time. If any abnormal situation is found, promptly control the alarm to send out audible and visual alarm signals, and report to the driver or the relevant system.

[0096] Data storage and calibration: The EEPROM storage module continuously stores the calibration information and important data of the system to ensure that the data will not be lost after power failure, providing data support for system maintenance and fault diagnosis.

[0097] Among them, in the 70 MPa hydrogen storage system, the specific scheme of the duty cycle control method is to precisely control the power of the bottle neck valve to avoid overheating of the coil caused by too high power and abnormal closing caused by too low power.

[0098] The specific scheme of the duty cycle control method is as follows

[0099] Initial opening stage:

[0100] When it is necessary to open the bottle neck valve, the system first supplies power to the bottle neck valve coil at the maximum power (such as 30 W) to ensure that the valve can be quickly opened. This stage may last for a short time until the bottle neck valve reaches the fully open state.

[0101] Power reduction and duty cycle adjustment:

[0102] After the bottle neck valve is fully opened, the controller immediately reduces the supply power to the minimum power required to maintain the valve open (such as 10 W). However, since temperature changes will affect the internal resistance of the bottle neck valve coil, resulting in changes in power requirements, it is not possible to simply maintain a constant power.

[0103] The controller adopts a closed-loop control strategy. By detecting the supply current in real time, it dynamically adjusts the duty cycle according to the preset current range. The duty cycle refers to the proportion of the time when the switch is on in a complete cycle. By adjusting the duty cycle, the average supply power can be adjusted without changing the supply voltage, thereby maintaining the stable open state of the bottle neck valve.

[0104] Real-time detection and adjustment:

[0105] The controller continuously monitors the supply current and compares it with the preset current threshold. If the current is higher than the upper threshold, it indicates that the coil temperature is too high or the internal resistance has decreased. At this time, the controller should reduce the duty cycle to lower the average power and prevent the coil from overheating.

[0106] On the contrary, if the current is lower than the lower threshold value, it indicates that the power may be insufficient to maintain the opening of the bottle mouth valve. At this time, the controller should appropriately increase the duty cycle to increase the average power and prevent the abnormal closing of the bottle mouth valve.

[0107] Safety protection mechanism:

[0108] During the duty cycle control process, if an abnormal current is detected (such as a sudden increase or decrease), it may indicate a fault such as a short circuit or open circuit in the bottle mouth valve. At this time, the controller should immediately stop power supply and report the fault information to the vehicle system so that the driver can perform maintenance in a timely manner.

[0109] Communication and monitoring:

[0110] The controller maintains communication with the vehicle system through the CAN communication module, and uploads key parameters such as the working status, current, and voltage of the bottle mouth valve in real time, so that the vehicle system can comprehensively monitor the hydrogen storage system.

[0111] Through the specific scheme of the above duty cycle control method, the controller of the 70 MPa hydrogen storage system can achieve precise control of the bottle mouth valve, which not only ensures the rapid opening and stable operation of the bottle mouth valve, but also effectively avoids problems such as overheating of the coil and abnormal closing.

[0112] The above are only the preferred embodiments of the present utility model, and do not limit the implementation manners and protection scope of the present utility model. For those skilled in the art, it should be realized that all equivalent replacements and obvious changes made by using the description and illustration content of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A 70 MPa hydrogen storage system controller, characterized in that: include: Main control unit; DCDC module used to convert the vehicle's 9-28V power supply to 5V for use by sensors and to convert the vehicle's 9-28V power supply to 12V for use by bottle valves; AD acquisition module for hydrogen pressure, voltage, current and temperature signal acquisition; I / O signal acquisition module for real-time acquisition of hydrogen concentration in 70MPa hydrogen storage system environment; CAN communication module for providing communication path; Relay control module for output control; An EEPROM storage module for storing calibration information; Wherein, the main control unit is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module and the EEPROM storage module respectively.

2. The 70 MPa hydrogen storage system controller according to claim 1, characterized in that: The main control unit includes a controller and a connector. The controller is electrically connected to the DCDC module, the AD acquisition module, the I / O signal acquisition module, the CAN communication module, the relay control module and the EEPROM storage module through the connector. The controller is connected to the hydrogen refueling station through an infrared communication module.

3. The 70 MPa hydrogen storage system controller according to claim 2, characterized in that: The DCDC module includes a DC-DC converter 1 for converting the 9-28V power supply of the whole vehicle into 5V and a DC-DC converter 2 for converting the 9-28V power supply of the whole vehicle into 12V. The input ends of the DC-DC converter 1 and the DC-DC converter 2 are both connected to the output end of the 9-28V power supply of the whole vehicle.

4. The 70 MPa hydrogen storage system controller according to claim 3, characterized in that: The AD acquisition module includes a hydrogen pressure sensor, a voltage sensor, a current sensor and a temperature sensor. The hydrogen pressure sensor is fixedly installed in the hydrogen storage cylinder. The voltage sensor and the current sensor are both connected to the bottle mouth valve input power supply of the hydrogen storage cylinder. The temperature sensor is installed on the bottle mouth valve of the hydrogen storage cylinder. The power supply ends of the hydrogen pressure sensor, the voltage sensor, the current sensor and the temperature sensor are respectively connected to the output end of the DC-DC converter 1, and the signal output ends of the hydrogen pressure sensor, the voltage sensor, the current sensor and the temperature sensor are respectively communicatively connected to the signal input end of the controller through the connector.

5. The 70 MPa hydrogen storage system controller according to claim 4, characterized in that: The I / O signal acquisition module includes a hydrogen concentration sensor, which is arranged on the periphery of the hydrogen storage cylinder. The power supply end of the hydrogen concentration sensor is connected to the output end of the DC-DC converter, and the signal output end of the hydrogen concentration sensor is communicatively connected to the signal input end of the controller through the connector.

6. The 70 MPa hydrogen storage system controller according to claim 5, characterized in that: The CAN communication module has two CAN communication channels. The controller communicates with the internal components of the battery stack system and the debugging host computer through one of the CAN communication channels, and the controller communicates with external vehicle signals through the other CAN communication channel.

7. The 70 MPa hydrogen storage system controller according to claim 6, characterized in that: The relay control module includes a stack water pump relay, a stack fan relay and a main negative relay. The stack water pump relay is connected in series with the stack water pump, the stack fan relay is connected in series with the stack fan, and the main negative relay is connected in series between the battery pack and the vehicle electrical system. The electrical control ends of the stack water pump relay, the stack fan relay and the main negative relay are electrically connected to the control output end of the controller through the connector.

8. The 70 MPa hydrogen storage system controller according to claim 7, characterized in that: It also includes an alarm, which is an audible and visual alarm, and the electrical control end of the alarm is electrically connected to the control output end of the controller through the connector.

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