Hydrogen fuel cell valve control system and control method

Abstract

The application belongs to the technical field of hydrogen fuel cell valve control system, and also relates to a hydrogen fuel cell valve control system. A controller (5) is installed on a circuit board in the valve upper cover (1) to receive external and internal input information, including signal input and angle sensor data, and to adjust the valve angle. An angle sensor is connected to the top end of a valve output shaft (2), and is used to measure the rotation angle of the valve output shaft (2). The output end of the angle sensor is connected to the controller (5). The hydrogen fuel cell valve control method has a buffering effect on the control rotation speed of the valve plate about to reach the target position under the premise of ensuring that the valve plate is quickly rotated to the position, realizes soft landing of the valve plate to the position, alleviates the problem of damage of the valve plate caused by the collision between the valve plate and the valve body, and improves the working performance and service life.

Description

Technical Field

[0001] This invention belongs to the field of hydrogen fuel cell technology, and more specifically, relates to a hydrogen fuel cell valve control system. This invention also relates to a control method for the hydrogen fuel cell valve control system. Background Technology

[0002] Hydrogen fuel cell valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control (temperature, pressure, and flow rate) of media. Based on function, they can be classified as shut-off valves, back pressure valves, bypass valves, etc. In the air intake and exhaust system of a hydrogen fuel cell, the air compressor is responsible for pressurizing the air and coordinating with the fuel cell valves according to the stack requirements to ensure that the airflow and pressure entering and leaving the stack are within a suitable range. Hydrogen fuel cell valves are control components in the fuel system, possessing functions such as shut-off, regulation, flow guidance, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. For hydrogen, a flammable and explosive gas, valve closure must ensure hydrogen sealing to prevent leakage. Currently, hydrogen fuel cell valves mainly rely on electronic control to rotate the valve output shaft. This electronic control is based on an internally programmed control system. The valve output shaft drives the valve plate to rotate, and the rotation of the valve plate controls the opening and closing of the valve cavity. Because the valve plate comes into contact with and collides with the valve body during use, if the rotation speed of the valve plate is not controlled, prolonged impact can cause deformation and damage to the contact surface between the valve plate and the valve body, affecting the valve's airtightness and service life.

[0003] Existing technology includes a device titled "An Air Supply Device for a Hydrogen Fuel Cell Stack," with publication number CN217768440U. This device provides an air supply system for a hydrogen fuel cell stack, comprising: an oil-gas filter, an air filter, an air compressor, an intercooler, a humidifier, and a hydrogen fuel cell stack. The oil-gas filter's inlet is connected to external air, and its outlet is connected to the air filter. The air filter's outlet is connected to the inlet of an air flow meter, the air flow meter's outlet is connected to the air compressor's inlet, the air compressor's outlet is connected to the intercooler's inlet, the intercooler's outlet is connected to the humidifier's dry inlet, and the humidifier's wet outlet is connected to the hydrogen fuel cell stack's air inlet. Furthermore, the oil-gas filter and air filter can be connected sequentially and arranged separately, or they can be integrated into a single air-oil-gas filter with oil-gas adsorption function, reducing the space occupied. This invention can adsorb and filter oil and gas impurities in the air required for fuel cell stacks, preventing oil and gas from entering the fuel cell stack and affecting power generation, thus ensuring the normal operation of the fuel cell stack.

[0004] However, this technology does not address the technical issues and solutions of this application. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a hydrogen fuel cell valve control method that addresses the shortcomings of existing technologies by providing a simple and effective method for achieving accurate rotation angle of the valve output shaft and valve plate driven by a motor, while forming a closed-loop control. The motor controls the rotation of the valve output shaft and valve plate in stages, ensuring that the valve plate rotates quickly to the target position while controlling the speed of the valve plate as it approaches the target position, thus playing a buffering role and achieving a soft landing of the valve plate. This reduces the problem of valve plate damage caused by collision between the valve plate and the valve body, thereby improving working performance and service life.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] This invention relates to a valve control method for a hydrogen fuel cell, specifically a valve soft-landing control method, comprising the following steps:

[0008] S1. After receiving the input command, the controller obtains the angle between the target position and the current position of the valve output shaft 2 and the valve plate in the command. Based on this angle, the controller determines whether the motor should perform rapid rotation combined with buffered rotation or perform buffered rotation alone.

[0009] S2. The condition for the motor to perform rapid rotation combined with buffered rotation is:

[0010] The angle between the target position and the current position is greater than 18%-22% of the rotation angle between the start and end points of the stroke;

[0011] When the angle between the current position of the valve output shaft and the valve plate and the target position is greater than 18%-22% of the angle between the start and end points of the stroke, the controller controls the motor to drive the valve output shaft and valve plate to rotate rapidly.

[0012] S3. When the angle between the current position of the valve output shaft and the valve plate and the target position is no greater than 18%-22% of the angle between the start and end points of the stroke, the controller 5 controls the motor 4 to drive the valve output shaft and valve plate to switch to buffer rotation.

[0013] S4. The condition for motor 4 to perform buffered rotation is:

[0014] The angle between the target position and the current position is no greater than 18%-22% of the rotation angle between the start and end points of the stroke;

[0015] The controller controls the motor to drive the valve output shaft and valve plate to rotate in a buffered manner until the valve output shaft and valve plate rotate from the current position to the target position.

[0016] S5. During the process of the motor driving the valve output shaft and valve plate to rotate, the angle sensor monitors the rotation angle of the valve output shaft in real time.

[0017] The controller sets the start and end points of the valve output shaft and valve plate stroke. The controller records the rotation angle between the start and end points of the valve output shaft and valve plate stroke, and stores the angle value, stroke start point, and stroke end point in the controller.

[0018] The angle between the stroke start point and the stroke end point is 90 degrees. When setting the stroke start point and stroke end point, the stroke start point is marked as point A and the stroke end point is marked as point B. When the valve output shaft and valve plate are rotated to point C, the angle between point C and the stroke start point A and the stroke end point marked as point B are calculated respectively, and the current position of the valve output shaft and valve plate is obtained. The angle and rotation direction between point C and the current position of the valve output shaft and valve plate are obtained.

[0019] The current position of the valve output shaft and valve plate of the hydrogen fuel cell valve is detected by an angle sensor, and the detection data is fed back to the controller.

[0020] When the hydrogen fuel cell valve is used in a vehicle, the vehicle ECU provides a signal to the hydrogen fuel cell valve. The controller of the hydrogen fuel cell valve drives the motor to drive the gear set to transmit the signal to the valve plate to open at different angles, controlling the intake air volume or back pressure. At the same time, the angle sensor of the hydrogen fuel cell valve collects the current position signal of the valve plate and feeds it back to the controller to adjust the position of the fuel cell valve plate. When the power is off, the hydrogen fuel cell valve is completely closed.

[0021] The hydrogen fuel cell valve has a power plug installed on the side wall of the valve body shell. The plug pin is connected to the control circuit board by soldering. An external control pin is provided on the outside of the controller. The external control pin is connected to the control circuit board by soldering.

[0022] The angle sensor is used to detect angles. When the angle sensor is connected to the control circuit, the angle sensor will count once for every 1 / 16th of a revolution of the valve output shaft. When the valve output shaft rotates in one direction, the count increases, and when the valve output shaft rotates in the other direction, the count decreases. The count is related to the initial position of the angle sensor. When the angle sensor is initialized, its count value is set to 0.

[0023] The motor is a servo motor. The servo motor is positioned by pulses. When the servo motor receives a pulse, it will rotate by the angle corresponding to that pulse. Every time the servo motor rotates by an angle, it will emit a corresponding number of pulses. In this way, it forms a response with the pulses received by the servo motor, or a closed loop.

[0024] A speed reducer is installed between the output shaft of the motor and the output shaft of the valve.

[0025] This invention also relates to a hydrogen fuel cell valve control system with a simple structure that effectively achieves accurate rotation angle of the valve output shaft and valve plate driven by the motor, while forming a closed-loop control. The motor controls the rotation of the valve output shaft and valve plate in stages. Under the premise of ensuring that the valve plate rotates quickly to the target position, the speed of the valve plate is controlled as it is about to reach the target position, which plays a buffering role and realizes the valve plate soft landing. This reduces the problem of valve plate damage caused by collision between the valve plate and the valve body, and improves working performance and service life.

[0026] The hydrogen fuel cell valve control system includes a controller mounted on a circuit board inside the valve cover. The controller receives external and internal input information, including signal input and angle sensor data, to adjust the valve angle. An angle sensor is connected to the top of the valve output shaft and measures its rotation angle. The output of the angle sensor is connected to the controller, which in turn connects to a motor. The motor's output shaft is driven by the top of the valve output shaft, enabling the motor to rotate the valve output shaft and the valve plate connected to it. The controller, located on a control circuit board inside the cover, receives external and internal input information, including signal input and angle sensor data, to adjust the valve angle. The angle sensor is connected to the top of the valve output shaft and measures its rotation angle. The output of the angle sensor is connected to the controller, which in turn connects to a motor. The motor's output shaft is driven by the top of the valve output shaft, enabling the motor to rotate the valve output shaft and the valve plate connected to it.

[0027] A buffer pad is provided on the outer wall of the valve plate.

[0028] The working principle and beneficial effects of the technical solution adopted in this invention are as follows:

[0029] The hydrogen fuel cell valve control method, or control system, described in this invention provides a method and system capable of achieving a soft landing of the valve plate (i.e., avoiding violent collisions when the valve plate contacts the valve body), thus solving the problems mentioned in the background art. Through the control system and method of this invention, the steps, trajectory, and speed of the valve output shaft rotation are reliably controlled. The valve output shaft drives the valve plate to rotate, and the rotation of the valve plate controls the opening and closing size of the sealing valve cavity. Furthermore, through the control system and method proposed based on a unique technical concept, the violent contact and collision between the valve plate and the valve body during use is effectively reduced. The implementation of the control method requires program control through the valve structure and electrical control method. Thus, the rotation speed of the valve plate is precisely controlled, ensuring a soft landing (just before contact) and reducing the impact between the valve plate and the valve body, solving the problem of easy damage to the valve plate. In the control system of this invention, the valve output shaft and valve plate are monitored in real time by setting an angle sensor. By calculating the angle between the current position and the target position of the valve output shaft and valve plate, the rotation angle of the valve output shaft and valve plate driven by the control motor can be made more accurate. Real-time monitoring of the valve output shaft and valve plate by the angle sensor, and monitoring during their rotation, forms a closed-loop control, thereby enabling staged control of the motor. The motor's rotation drive of the valve output shaft and valve plate can be divided into two cases: rapid rotation combined with buffered rotation, or buffered rotation alone. While ensuring the valve plate rotates rapidly to its target position, the rotation speed of the valve plate is controlled as it approaches the target position, providing a buffering and soft-landing effect. Attached Figure Description

[0030] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein:

[0031] Figure 1 This is a schematic diagram of the structure of the hydrogen fuel cell valve control system described in this invention;

[0032] Figure 2 This is a logic diagram of the hydrogen fuel cell valve control system described in this invention;

[0033] Figure 3 This is a schematic diagram of the control flow of the hydrogen fuel cell valve control system described in this invention;

[0034] The labels in the attached diagram are as follows: 1. Valve top cover; 2. Valve output shaft; 3. Valve plate; 4. Motor; 5. Controller; 6. Valve body shell. Detailed Implementation

[0035] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of the present invention, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part:

[0036] As attached Figure 1 -Appendix Figure 3 As shown, this invention relates to a valve control method for a hydrogen fuel cell. This method is a valve soft-landing control method, and the control steps are as follows:

[0037] S1. After receiving the input command, controller 5 obtains the angle between the target position and the current position that valve output shaft 2 and valve plate 3 need to rotate in the command. Based on this angle, controller 5 determines whether motor 4 should perform rapid rotation combined with buffered rotation or perform buffered rotation alone. S2. The condition for motor 4 to perform rapid rotation combined with buffered rotation is that the angle between the target position and the current position is greater than 18%-22% of the angle between the start and end points of the stroke. When the angle between the current position and the target position of valve output shaft 2 and valve plate 3 is greater than 18%-22% of the angle between the start and end points of the stroke, controller 5 controls motor 4 to drive valve output shaft 2 and valve plate 3 to rotate rapidly. S3. When the current position of valve output shaft 2 and valve plate 3 is greater than 18%-22% of the angle between the start and end points of the stroke, controller 5 controls motor 4 to drive valve output shaft 2 and valve plate 3 to rotate rapidly. When the angle between the target positions is no greater than 18%-22% of the rotation angle between the start and end points of the stroke, achieving both the technically required full-open / full-close time and meeting the soft landing requirement, the controller 5 controls the motor 4 to drive the valve output shaft 2 and valve plate 3 to switch to buffered rotation; S4. The condition for the motor 4 to perform buffered rotation is: the angle between the target position and the current position is no greater than 18%-22% of the rotation angle between the start and end points of the stroke; the controller 5 controls the motor 4 to drive the valve output shaft 2 and valve plate 3 to buffered rotation until the valve output shaft 2 and valve plate 3 rotate from the current position to the target position; S5. During the rotation of the valve output shaft 2 and valve plate 3 driven by the motor 4, the angle sensor monitors the rotation angle of the valve output shaft 2 in real time. The above steps address the shortcomings of the existing technology and propose an improved technical solution. The purpose of this invention is to provide a control method and control system for hydrogen fuel cell valves that can achieve soft landing of the valve plate (i.e., avoid violent collision when the valve plate contacts the valve body), thereby solving the problems mentioned in the background technology. The control system and method of this invention reliably control the steps, trajectory, and speed of the valve output shaft 2's rotation. The valve output shaft 2 drives the valve plate 3 to rotate, and the rotation of the valve plate 3 controls the opening and closing size of the sealing valve cavity. Furthermore, the control system and method, based on a unique technical concept, effectively reduce the intense contact and collision between the valve plate 3 and the valve body during use. The implementation of the control method requires program control through the valve structure and electrical control methods. This allows for precise control of the valve plate 3's rotation speed, ensuring a soft landing when the valve plate 3 is about to contact the valve body, reducing the impact between the valve plate 3 and the valve body, and solving the problem of easy damage to the valve plate.In this invention, 1) the valve output shaft and valve plate are monitored in real time by setting an angle sensor. By calculating the angle between the current position of the valve output shaft 2 and valve plate 3 and the target position, the angle at which the control motor drives the valve output shaft 2 and valve plate 3 to rotate is made more accurate; 2) the valve output shaft 2 and valve plate 3 are monitored in real time by the angle sensor, and also monitored when the valve output shaft 2 and valve plate 3 rotate, which can form a closed-loop control and realize staged control of the motor 4. The rotation drive of the motor 4 on the valve output shaft 2 and valve plate 3 is divided into two cases: rapid rotation combined with buffered rotation or buffered rotation alone. Under the premise of ensuring that the valve plate rotates quickly to the target position, the speed of the valve plate that is about to reach the target position is controlled to play a role in buffering and soft landing. The hydrogen fuel cell valve control method of this invention achieves accurate rotation angle of the valve output shaft and valve plate driven by the motor, forming a closed-loop control. The motor controls the rotation of the valve output shaft and valve plate in stages, controlling the speed of the valve plate as it approaches the target position while ensuring rapid rotation to the target position. This buffers the valve plate, achieving a soft landing and mitigating damage caused by collision between the valve plate and the valve body, thus improving performance and service life. In this invention, the valve plate rotation speed can be set as needed; therefore, rapid rotation is a relative concept, and different speeds will exist for different valve structures in different batteries.

[0038] The controller 5 sets the start and end points of the travel of the valve output shaft 2 and valve plate 3. The controller 5 records the rotation angle between the start and end points of the travel of the valve output shaft 2 and valve plate 3, and stores the angle values, travel start point, and travel end point in the controller 5. The angle between the travel start and end point is 90 degrees. When setting the travel start and end point, the travel start point is marked as point A, and the travel end point is marked as point B. When the valve output shaft 2 and valve plate 3 are rotated to point C, the angles between point C and the travel start point A and the end point B are calculated respectively. The current position of the valve output shaft 2 and valve plate 3 is obtained, and the angle and rotation direction between point C and the current position of the valve output shaft 2 and valve plate 3 are obtained. This structure enables the internal setting of the control system, effectively ensuring that the hydrogen fuel cell valve opens and closes according to the set trajectory, steps, and speed, meeting the set requirements.

[0039] The current position of the valve output shaft 2 and valve plate 3 of the hydrogen fuel cell valve is detected by an angle sensor, and the detection data is fed back to the controller 5. With this structure, the control unit reliably receives the data detected by the angle sensor and issues commands based on the data.

[0040] When the aforementioned hydrogen fuel cell valve is used in a vehicle, the vehicle ECU provides a signal to the hydrogen fuel cell valve. The controller 5 of the hydrogen fuel cell valve drives the motor 4, which in turn drives the gear set to transmit signals to the valve plate 3, opening it at different angles to control the intake air volume or back pressure. Simultaneously, the angle sensor of the hydrogen fuel cell valve collects the current position signal of the valve plate 3 and feeds it back to the controller 5 to adjust the position of the fuel cell valve plate 3. When power is off, the hydrogen fuel cell valve is completely closed. As a component of the fuel cell air intake and exhaust system, the fuel cell valve has an electrical interface. The built-in controller of the fuel cell valve integrates high-temperature electronic devices, enabling it to perform disc valve position control and self-diagnostic functions independently. The position of the disc valve is fed back to the control unit via a signal status.

[0041] The structure of the hydrogen fuel cell valve control system described in this invention, Figure 1 The multiple valve plates in the diagram represent the movement trajectory of the valve plates and indicate the rotation direction of the output shaft.

[0042] The hydrogen fuel cell valve has a power connector mounted on the side wall of its valve body housing 6. The connector's pin is soldered to the control circuit board. The controller 5 has an external control pin connection array, which is soldered to the control circuit board. This structure facilitates reliable circuit connection between the control circuit board and related components, enabling the desired functionality.

[0043] In the control system of the present invention, the angle sensor is used to detect the angle. When the angle sensor is connected to the control circuit, the angle sensor counts once for every 1 / 16 revolution of the valve output shaft 2. When the valve output shaft 2 rotates in one direction, the count increases, and when the valve output shaft 2 rotates in another direction, the count decreases. The count is related to the initial position of the angle sensor. When the angle sensor is initialized, its count value is set to 0.

[0044] The aforementioned motor 4 is a servo motor. Servo motors rely on pulse positioning. When a servo motor receives one pulse, it rotates by the angle corresponding to that pulse. Each rotation of the servo motor generates a corresponding number of pulses, creating a feedback loop with the received pulses. In the above steps, the servo motor primarily relies on pulse positioning. Each pulse received by the servo motor causes it to rotate by the angle corresponding to that pulse, thus achieving displacement. Because the servo motor itself has the function of generating pulses, each rotation generates a corresponding number of pulses, creating a feedback loop with the received pulses. In this way, the system knows how many pulses were sent to the servo motor and how many pulses were received, allowing for precise control of the motor's rotation and achieving precise positioning down to 0.001mm. Motors are classified as brushed motors and brushless motors.

[0045] The valve cover 1 also integrates a power supply, which is electrically connected to the motor 4, controller 5, and angle sensor. The power supply provides electrical energy to the motor 4, controller 5, and angle sensor, and the voltage provided by the power supply is controlled by a transformer to meet the operating requirements of these components. The motor 4 has a built-in braking mechanism, and a buffer pad is provided on the outer wall of the valve plate 3. With the addition of the braking mechanism and buffer pad, the braking mechanism can brake the rotor shaft of the motor 4, decelerating and locking the rotor shaft, while the buffer pad provides contact cushioning.

[0046] A speed reducer is installed between the output shaft of the motor 4 and the valve output shaft 2. This structure, through the use of the speed reducer, requires the motor 4 to rotate the valve output shaft 2 more times to reach the target position, thereby dispersing and reducing errors and improving accuracy.

[0047] This invention also relates to a hydrogen fuel cell valve control system, including a controller 5, which is installed on a circuit board inside the valve cover 1 to receive external and internal input information, including signal input and angle sensor data, and to adjust the valve angle; the angle sensor is connected to the top end of the valve output shaft 2 and is used to measure the rotation angle of the valve output shaft 2; the output end of the angle sensor is connected to the controller 5, and the output end of the controller 5 is connected to the motor 4; the output shaft of the motor 4 is driven to the top end of the valve output shaft 2, and the motor 4 can drive the valve output shaft 2 and the valve plate 3 on its outer wall to rotate.

[0048] A buffer pad is provided on the outer wall of the valve plate 3.

[0049] The hydrogen fuel cell valve control method, or control system, described in this invention aims to provide a control method and system for hydrogen fuel cell valves that enables soft landing of the valve plate (i.e., avoids violent collisions when the valve plate contacts the valve body), thereby solving the technical problems mentioned in the background art. Through the control system and method of this invention, the steps, trajectory, and speed of the valve output shaft 2's rotation can be reliably controlled. The valve output shaft 2 drives the valve plate 3 to rotate, and the rotation of the valve plate 3 controls the opening and closing size of the sealing valve (valve body) cavity. Furthermore, through the control system and method proposed based on a unique technical concept, the violent contact and collision between the valve plate 3 and the valve body during use is effectively reduced. The implementation of the control method requires program control through the valve structure and electrical control method. Thus, the rotation speed of the valve plate 3 is precisely controlled, ensuring a soft landing of the valve plate 3 just before contact with the valve body, reducing the impact between the valve plate 3 and the valve body, and solving the problem of easy damage to the valve plate. In this invention, 1) the valve output shaft and valve plate are monitored in real time by setting an angle sensor. By calculating the angle between the current position of the valve output shaft 2 and valve plate 3 and the target position, the angle at which the control motor drives the valve output shaft 2 and valve plate 3 to rotate is made more accurate; 2) the valve output shaft 2 and valve plate 3 are monitored in real time by the angle sensor, and also monitored when the valve output shaft 2 and valve plate 3 rotate, which can form a closed-loop control and realize staged control of the motor 4. The rotation drive of the motor 4 on the valve output shaft 2 and valve plate 3 is divided into two cases: rapid rotation combined with buffered rotation or buffered rotation alone. Under the premise of ensuring that the valve plate rotates quickly to the target position, the speed of the valve plate that is about to reach the target position is controlled, which plays a role in buffering and soft landing of the valve plate 3.

[0050] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A valve control method for a hydrogen fuel cell, characterized in that: The aforementioned hydrogen fuel cell valve control method is a valve soft landing control method, and the control steps are as follows: S1. After receiving the input instruction, the controller (5) obtains the angle between the target position and the current position of the valve output shaft (2) and valve plate (3) in the instruction, and determines whether the motor (4) performs rapid rotation combined with buffer rotation or performs buffer rotation alone. S2. The condition for motor (4) to perform rapid rotation combined with buffer rotation is: The angle between the target position and the current position is greater than 18%-22% of the rotation angle between the start and end points of the stroke. When the angle between the current position of the valve output shaft (2) and the valve plate (3) and the target position is greater than 18%-22% of the angle between the start and end points of the stroke, the controller (5) controls the motor 4 to drive the valve output shaft (2) and the valve plate (3) to rotate rapidly. S3. When the angle between the current position of the valve output shaft (2) and the valve plate (3) and the target position is no greater than 18%-22% of the angle between the start and end points of the stroke, the controller (5) controls the motor (4) to drive the valve output shaft (2) and the valve plate (3) to switch to buffer rotation. S4. The condition for the motor (4) to perform buffered rotation is: The angle between the target position and the current position shall not exceed 18%-22% of the rotation angle between the start and end points of the stroke. The controller (5) controls the motor (4) to drive the valve output shaft (2) and valve plate (3) to rotate in a buffered manner until the valve output shaft (2) and valve plate (3) rotate from the current position to the target position; S5. During the process of the motor (4) driving the valve output shaft (2) and valve plate (3) to rotate, the angle sensor monitors the rotation angle of the valve output shaft (2) in real time; The controller (5) sets the start and end points of the stroke of the valve output shaft (2) and the valve plate (3). The controller (5) records the angle between the start and end points of the stroke of the valve output shaft (2) and the valve plate (3). The angle, the start and end points of the stroke are recorded and stored in the controller (5). The angle between the stroke start point and the stroke end point is 90 degrees. When setting the stroke start point and the stroke end point, the stroke start point is marked as point A and the stroke end point is marked as point B. When the valve output shaft (2) and valve plate (3) are rotated to point C, the angle between point C and the stroke start point A and the stroke end point marked as point B are calculated respectively, and the current position of the valve output shaft (2) and valve plate (3) is obtained. The angle and rotation direction between point C and the current position of the valve output shaft (2) and valve plate (3) are obtained.

2. The hydrogen fuel cell valve control method according to claim 1, characterized in that: The current position of the valve output shaft (2) and valve plate (3) of the hydrogen fuel cell valve is detected by an angle sensor, and the detection data is fed back to the controller (5).

3. The hydrogen fuel cell valve control method according to claim 1 or 2, characterized in that: When the hydrogen fuel cell valve is used in a vehicle, the vehicle ECU provides a signal to the hydrogen fuel cell valve. The controller (5) of the hydrogen fuel cell valve drives the motor (4) to drive the gear set to transmit to the valve plate (3) to open at different angles, controlling the intake air volume or back pressure. At the same time, the angle sensor of the hydrogen fuel cell valve collects the current position signal of the valve plate (3) and feeds it back to the controller (5) to adjust the position of the valve plate (3) of the fuel cell valve. When the power is off, the hydrogen fuel cell valve is completely closed.

4. The hydrogen fuel cell valve control method according to claim 1 or 2, characterized in that: The valve body shell (6) of the hydrogen fuel cell valve is equipped with a power plug on its side wall. The plug pin is connected to the control circuit board by soldering. The controller (5) is provided with an external control pin connection array, which is connected to the control circuit board by soldering.

5. The hydrogen fuel cell valve control method according to claim 1 or 2, characterized in that: The angle sensor is used to detect angles. When the angle sensor is connected to the control circuit, the angle sensor will count once for every 1 / 16 revolution of the valve output shaft (2). When the valve output shaft (2) rotates in one direction, the count increases, and when the valve output shaft (2) rotates in another direction, the count decreases. The count is related to the initial position of the angle sensor. When the angle sensor is initialized, its count value is set to 0.

6. The hydrogen fuel cell valve control method according to claim 1 or 2, characterized in that: The motor (4) is a servo motor. The servo motor is positioned by pulse. When the servo motor receives one pulse, it rotates by the angle corresponding to one pulse. Every time the servo motor rotates by an angle, it will emit a corresponding number of pulses, which correspond to the pulses received by the servo motor, or a closed loop.

7. The hydrogen fuel cell valve control method according to claim 6, characterized in that: A speed reducer is installed between the output shaft of the motor (4) and the output shaft of the valve (2).

8. A hydrogen fuel cell valve control system using the hydrogen fuel cell valve control method according to claim 1, characterized in that: The system includes a controller (5), which is installed on a circuit board inside the valve cover (1) to receive external and internal input information, including signal input and angle sensor data, and to adjust the valve angle. The angle sensor is connected to the top of the valve output shaft (2) and is used to measure the rotation angle of the valve output shaft (2). The output end of the angle sensor is connected to the controller (5), and the output end of the controller (5) is connected to the motor (4). The output shaft of the motor (4) is connected to the top of the valve output shaft (2), and the motor (4) can drive the valve output shaft (2) and the valve plate (3) on its outer wall to rotate.

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