Hydrogen pressure control method, device, hydrogen proportional valve, equipment and medium for hydrogen proportional valve

Abstract

The present invention discloses a hydrogen pressure control method, device, hydrogen proportional valve, equipment and medium of a hydrogen proportional valve, the method comprising: when the hydrogen proportional valve discharges hydrogen, respectively obtaining an opening feedback parameter and an air pressure feedback parameter, wherein the opening feedback parameter is a parameter fed back according to the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back according to the exhaust port air pressure of the hydrogen proportional valve; adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the air pressure feedback parameter, so that the exhaust port air pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user. The present invention can reduce the influence of nonlinearity by combining the opening feedback parameter and the air pressure feedback parameter for comprehensive adjustment, making the control of the armature linear, thereby improving the control accuracy.

Description

Background Art

[0002] The core component currently available on the market for hydrogen pressure control in hydrogen fuel cell systems is the hydrogen proportional valve, which controls the stroke of the armature by converting the size of the control coil current into electromagnetic force. The armature will change the nozzle diameter of the proportional valve during the opening and closing stroke. Under the same valve inlet pressure, the nozzle diameter controls the corresponding gas flow output by the proportional valve. That is, the gas flow rate is changed by changing the opening and closing stroke of the armature, and this stroke can be regarded as the "opening" of the proportional valve. Since the hydrogen fuel cell system has extremely high requirements for the control accuracy of hydrogen pressure, it is very necessary to accurately control the opening of the hydrogen proportional valve.

[0003] Since hydrogen requires good air tightness and there must be no risk of hydrogen leakage, there is no condition to add a position sensor inside. The commonly used control method is: adjust the coil current through the controller to control the internal armature and spring activity to adjust the opening and closing stroke of the hydrogen proportional valve, so that hydrogen is discharged from the outlet of the hydrogen proportional valve. During the discharge process, the hydrogen pressure of the hydrogen at the outlet of the hydrogen proportional valve is simultaneously detected, and then the controller is feedback closed-loop controlled according to the hydrogen pressure, and finally the hydrogen pressure reaches the user's set value.

[0004] However, the commonly used methods currently have the following technical problems: the above control method assumes that the voltage or current of the controller control coil and the hydrogen pressure at the valve outlet are in a linear relationship, but because the internal armature and spring are high-frequency actions, in the process of gradually opening the size of the hydrogen proportional valve opening, the armature will rub against the inside of the coil. Friction will cause the friction force to change, and the change in friction force makes the entire stroke force nonlinear, which will not only cause the actual opening and closing stroke of the hydrogen proportional valve to deviate from the opening and closing stroke corresponding to the user set value, reducing the control accuracy, but also cause the controller to respond untimely or control delays, leading to pressure out of control. Summary of the invention

[0005] The present invention provides a hydrogen pressure control method, device, hydrogen proportional valve, equipment and medium of a hydrogen pressure proportional valve. The method can solve the technical problems of low control accuracy and easy pressure loss in the prior art.

[0006] A first aspect of an embodiment of the present invention provides a hydrogen pressure control method of a hydrogen proportional valve, characterized in that the method comprises:

[0007] When the hydrogen proportional valve discharges hydrogen, an opening feedback parameter and an air pressure feedback parameter are respectively obtained, wherein the opening feedback parameter is a parameter fed back according to the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back according to the air pressure of the exhaust port of the hydrogen proportional valve;

[0008] The control voltage value of the hydrogen proportional valve is adjusted according to the opening feedback parameter and the air pressure feedback parameter so that the air pressure at the exhaust port of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

[0009] In combination with the first aspect, in one implementation, obtaining the opening feedback parameter includes:

[0010] Obtaining a magnetic field change parameter, wherein the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves;

[0011] After the magnetic field change parameter is converted into a voltage parameter, the opening feedback parameter is calculated according to the voltage parameter.

[0012] In combination with the first aspect, in one implementation, adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter includes:

[0013] respectively determining control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter;

[0014] The control voltage value of the hydrogen proportional valve is calculated according to the control weight value.

[0015] A second aspect of an embodiment of the present invention provides a hydrogen pressure control device for a hydrogen proportional valve, characterized in that the device comprises:

[0016] A parameter acquisition module, used to respectively acquire an opening feedback parameter and an air pressure feedback parameter when the hydrogen proportional valve discharges hydrogen, wherein the opening feedback parameter is a parameter fed back based on the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back based on the air pressure at the exhaust port of the hydrogen proportional valve;

[0017] The control module is used to adjust the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the air pressure feedback parameter so that the exhaust port pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

[0018] In conjunction with the second aspect, in one implementation, obtaining the opening feedback parameter includes:

[0019] Obtaining a magnetic field change parameter, wherein the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves;

[0020] After the magnetic field change parameter is converted into a voltage parameter, the opening feedback parameter is calculated according to the voltage parameter.

[0021] In combination with the second aspect, in one implementation, adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter includes:

[0022] respectively determining control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter;

[0023] The control voltage value of the hydrogen proportional valve is calculated according to the control weight value.

[0024] A third aspect of the embodiments of the present invention provides a hydrogen proportional valve, the hydrogen proportional valve comprising: a proportional valve body, an external cylinder body and a position sensor;

[0025] A cylinder piston is arranged in the cavity of the external cylinder, and a magnet is arranged in the cylinder piston. The cavity of the external cylinder is connected to the cavity where the armature of the proportional valve body is located through a hydraulic pipeline.

[0026] The armature of the proportional valve body pushes the cylinder piston by changing the pressure of the oil pressure pipeline when it moves, so that the position sensor detects the moving distance of the magnet following the movement of the cylinder piston, and calculates the stroke of the proportional valve according to the moving distance.

[0027] In combination with the third aspect, in one implementation, a movable spring is provided in the cavity of the external cylinder body, the movable spring is connected to the cylinder piston, and the magnet passes through the external cylinder body so that the position sensor can detect the moving distance of the magnet when following the movement of the cylinder piston.

[0028] Compared with the prior art, the hydrogen pressure control method, device, hydrogen proportional valve, equipment and medium of a hydrogen proportional valve provided in the embodiment of the present invention have the beneficial effect that: when the hydrogen proportional valve discharges hydrogen, the present invention can obtain the opening feedback parameter based on the armature stroke feedback of the hydrogen proportional valve and the air pressure feedback parameter based on the exhaust port air pressure feedback of the hydrogen proportional valve respectively; according to the opening feedback parameter and the air pressure feedback parameter, the control voltage value of the hydrogen proportional valve is adjusted so that the exhaust port air pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user. Comprehensive adjustment combined with the opening feedback parameter and the air pressure feedback parameter can reduce the influence of nonlinearity, make the control of the armature linear, and thus improve the control accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a curve schematic diagram of the rising interval and the falling interval of the hydrogen proportional valve provided by one embodiment of the present invention;

[0030] Figure 2 It is a flow chart of a hydrogen pressure control method of a hydrogen proportional valve provided by one embodiment of the present invention;

[0031] Figure 3 It is an operation flow chart of a hydrogen pressure control method of a hydrogen proportional valve provided by one embodiment of the present invention;

[0032] Figure 4 It is a structural schematic diagram of a hydrogen pressure control device of a hydrogen proportional valve provided by one embodiment of the present invention;

[0033] Figure 5 It is a structural schematic diagram of a hydrogen proportional valve provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] The core component currently available on the market for hydrogen pressure control in hydrogen fuel cell systems is the hydrogen proportional valve, which controls the stroke of the armature by converting the size of the control coil current into electromagnetic force. The armature will change the nozzle diameter of the proportional valve during the opening and closing stroke. Under the same valve inlet pressure, the nozzle diameter controls the corresponding gas flow output by the proportional valve. That is, the gas flow rate is changed by changing the opening and closing stroke of the armature, and this stroke can be regarded as the "opening" of the proportional valve. Since the hydrogen fuel cell system has extremely high requirements for the control accuracy of hydrogen pressure, it is very necessary to accurately control the opening of the hydrogen proportional valve.

[0036] Since hydrogen requires good air tightness and there must be no risk of hydrogen leakage, there is no condition to add a position sensor inside. The commonly used control method is: adjust the coil current through the controller to control the internal armature and spring activity to adjust the opening and closing stroke of the hydrogen proportional valve, so that hydrogen is discharged from the outlet of the hydrogen proportional valve. During the discharge process, the hydrogen pressure of the hydrogen at the outlet of the hydrogen proportional valve is simultaneously detected, and then the controller is feedback closed-loop controlled according to the hydrogen pressure, and finally the hydrogen pressure reaches the user's set value.

[0037] However, the commonly used methods currently have the following technical problems: the above control method assumes that the voltage or current of the controller control coil and the hydrogen pressure at the valve outlet are in a linear relationship, but because the internal armature and spring are high-frequency actions, in the process of gradually opening the size of the hydrogen proportional valve opening, the armature will rub against the inside of the coil. Friction will cause the friction force to change, and the change in friction force makes the entire stroke force nonlinear, which will not only cause the actual opening and closing stroke of the hydrogen proportional valve to deviate from the opening and closing stroke corresponding to the user set value, reducing the control accuracy, but also cause the controller to respond untimely or control delays, leading to pressure out of control.

[0038] Reference Figure 1, which shows a curve diagram of the rising interval and the falling interval of the hydrogen proportional valve provided in one embodiment of the present invention.

[0039] Specifically, when the above nonlinear situation occurs, the controller will not respond in time and will be out of control. Figure 1 As shown in the figure, the curves of the proportional valve rising interval and falling interval do not overlap. When the input current is not monotonically increasing or decreasing, a nonlinear step of the flow output will appear, which is unknown to the controller. The controller will continue to control the proportional valve to increase the stroke, making the output flow of the proportional valve much larger than the target flow, resulting in a large deviation between the actual output flow and the target flow; the subsequent feedback adjustment must also be regulated according to the flow with a large deviation, which will also increase the amplitude of the regulation.

[0040] In order to solve the above problems, a hydrogen pressure control method, device, hydrogen proportional valve, equipment and medium of a hydrogen proportional valve provided in an embodiment of the present application will be introduced and explained in detail through the following specific embodiments.

[0041] Reference Figure 2 , showing a flow chart of a hydrogen pressure control method of a hydrogen proportional valve provided in one embodiment of the present invention.

[0042] In one embodiment, the hydrogen pressure control method of the hydrogen proportional valve is applicable to the controller of the hydrogen proportional valve. The controller can control the coil current of the hydrogen proportional valve so that the coil generates electromagnetic force to control the stroke of the armature by electromagnetic force, thereby allowing the armature to change the nozzle diameter of the proportional valve during the opening and closing stroke. Under the condition of the same valve inlet pressure, the nozzle diameter size controls the corresponding gas flow output by the proportional valve.

[0043] Wherein, as an example, the hydrogen pressure control method of the hydrogen proportional valve may include:

[0044] S11. When the hydrogen proportional valve discharges hydrogen, an opening feedback parameter and an air pressure feedback parameter are respectively obtained, wherein the opening feedback parameter is a parameter fed back based on the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back based on the air pressure at the exhaust port of the hydrogen proportional valve.

[0045] In one operation mode, a target hydrogen pressure value input by a user may be obtained, and the target hydrogen pressure value may be a hydrogen pressure value at an exhaust port of a hydrogen proportional valve.

[0046] In the process of controlling the hydrogen proportional valve to discharge hydrogen according to the target hydrogen pressure value, the opening feedback parameter and the gas pressure feedback parameter can be obtained.

[0047] Among them, the opening feedback parameter is a parameter fed back based on the armature stroke of the hydrogen proportional valve, and specifically can be to detect the opening and closing stroke or the moving distance of the armature during the activity process, and then generate a feedback signal according to the numerical value of the opening and closing stroke or the moving distance to obtain the opening feedback parameter.

[0048] The pressure feedback parameter is a parameter fed back based on the pressure at the exhaust port of the hydrogen proportional valve. Specifically, the hydrogen pressure value at the exhaust port of the hydrogen proportional valve may be detected, and a feedback signal may be generated based on the value of the hydrogen pressure value to obtain the pressure feedback parameter.

[0049] The actual opening of the hydrogen proportional valve can be determined by the opening feedback parameter and the air pressure feedback parameter. Whether adjustment is needed can be determined based on the actual opening. When the exhaust pressure of the hydrogen proportional valve does not reach the target hydrogen pressure value, adjustment can also be made based on the opening feedback parameter and the air pressure feedback parameter. Combining the two parameters for comprehensive adjustment can not only improve the accuracy of control and adjustment, but also simplify the control process and improve the efficiency of control.

[0050] In one embodiment, in order to accurately detect the displacement change of the armature when it moves under the electromagnetic force of the coil, a magnet can be connected to the armature. When the armature moves up and down, it also drives the magnet to move, and then the opening and closing stroke of the armature can be obtained by detecting the moving distance of the magnet.

[0051] As an example, the step of obtaining the opening feedback parameter may include the following sub-steps:

[0052] S111. Obtain a magnetic field change parameter, where the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves.

[0053] S112, after converting the magnetic field change parameter into a voltage parameter, calculating the opening feedback parameter according to the voltage parameter.

[0054] In specific operation, a sensor can be set around the magnet. When the armature of the hydrogen proportional valve moves and drives the connected magnet, the distance between the magnet and the sensor changes due to the movement of the magnet, and the magnetic field strength between them also changes. Then, the sensor can detect the change value of the magnetic field strength of the magnet during the movement process, and the magnetic field change parameter can be obtained.

[0055] Next, the magnetic field change parameter can be converted into a voltage parameter, and the opening feedback parameter can be calculated according to the voltage parameter. Specifically, the magnetic field change parameter can be converted into a voltage change value, and then converted into a distance according to the size of the voltage change value, and the actual opening distance of the armature can be obtained, and the opening feedback parameter can be obtained.

[0056] S12. Adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the air pressure feedback parameter so that the air pressure at the exhaust port of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

[0057] In one embodiment, it can be determined whether the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is the same as the target hydrogen pressure value preset by the user. If the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is different from the target hydrogen pressure value preset by the user, the control voltage value of the coil controlling the hydrogen proportional valve can be adjusted according to the opening feedback parameter and the pressure feedback parameter, and the coil generates an adjusted electromagnetic force according to the control voltage value, so that the stroke of the armature can be controlled by utilizing the adjusted electromagnetic force to adjust the opening and closing stroke of the armature, and then the nozzle diameter of the proportional valve can be changed so that the exhaust port pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

[0058] In an optional embodiment, the step of adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter may include the following sub-steps:

[0059] S121. Determine control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter respectively.

[0060] S122. Calculate a control voltage value of a hydrogen proportional valve according to the control weight value.

[0061] In one adjustment method, the control weight values ​​of the opening feedback parameter and the air pressure feedback parameter can be determined respectively. Specifically, the control weight value corresponding to the opening feedback parameter and the control weight value corresponding to the air pressure feedback parameter can be determined.

[0062] The voltage of the control coil is determined according to the size of the control weight value, and the control voltage value for adjusting the hydrogen proportional valve is obtained.

[0063] In one implementation, based on the control weight value corresponding to the opening feedback parameter and the control weight value corresponding to the air pressure feedback parameter, if the control weight value corresponding to the opening feedback parameter is greater than the control weight value corresponding to the air pressure feedback parameter, the control weight value corresponding to the opening feedback parameter can be multiplied by the current voltage value of the coil of the hydrogen proportional valve to obtain the control voltage value.

[0064] Optionally, based on the above example, it is also possible to determine whether the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is greater than the target hydrogen pressure value preset by the user. If the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is greater than the target hydrogen pressure value preset by the user, the current voltage value of the coil of the hydrogen proportional valve is increased according to the control weight value corresponding to the opening feedback parameter to obtain the control voltage value. On the contrary, if the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is less than the target hydrogen pressure value preset by the user, the current voltage value of the coil of the hydrogen proportional valve is reduced according to the control weight value corresponding to the opening feedback parameter to obtain the control voltage value. Subsequently, the control is adjusted according to the control voltage value. After each adjustment, the above steps can be repeated to obtain the opening feedback parameter and the pressure feedback parameter again, and then adjusted until the hydrogen pressure value at the exhaust port of the hydrogen proportional valve is equal to the target hydrogen pressure value preset by the user.

[0065] In another optional embodiment, different control algorithms may be used, such as PID control, fuzzy control, etc., with the purpose of making the hydrogen pressure value at the exhaust port of the hydrogen proportional valve equal to the target hydrogen pressure value preset by the user through the voltage. It may also be regulated according to the opening feedback parameter and the pressure feedback parameter according to the prior art, and may be adjusted according to actual needs.

[0066] Reference Figure 3 , shows an operation flow chart of a hydrogen pressure control method of a hydrogen proportional valve provided by an embodiment of the present invention.

[0067] Specifically, the operation of the hydrogen pressure control method of the hydrogen proportional valve includes the following steps:

[0068] The first step is to determine the hydrogen pressure control target value and transmit the hydrogen pressure control target value to the controller.

[0069] In the second step, the controller determines the proportional valve voltage according to the hydrogen pressure control target value to control the proportional valve activity according to the given proportional valve voltage.

[0070] The third step is to obtain the opening feedback signal and the hydrogen pressure at the proportional valve outlet during the proportional valve activity process.

[0071] In the fourth step, the controller adjusts the proportional valve voltage according to the opening feedback signal and the hydrogen pressure at the proportional valve outlet so that the hydrogen pressure at the hydrogen proportional valve outlet reaches the hydrogen pressure control target value.

[0072] The advantage of this control method is that the relationship between opening and pressure is linear. At the same time, this control method is similar to the air pressure control structure of the fuel cell system. The throttle valve itself has an opening control system, and the controller only needs to give an opening demand instruction based on the pressure demand, which can further simplify the control process and improve the control accuracy.

[0073] In this embodiment, the embodiment of the present invention provides a hydrogen pressure control method for a hydrogen proportional valve, and its beneficial effect is that: when the hydrogen proportional valve discharges hydrogen, the present invention can obtain the opening feedback parameter based on the armature stroke feedback of the hydrogen proportional valve and the air pressure feedback parameter based on the exhaust port air pressure feedback of the hydrogen proportional valve respectively; according to the opening feedback parameter and the air pressure feedback parameter, the control voltage value of the hydrogen proportional valve is adjusted so that the exhaust port air pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user. Comprehensive adjustment combined with the opening feedback parameter and the air pressure feedback parameter can reduce the influence of nonlinearity, make the control of the armature linear, and thus improve the control accuracy.

[0074] The embodiment of the present invention also provides a hydrogen pressure control device for a hydrogen proportional valve, see Figure 4 , showing a structural schematic diagram of a hydrogen pressure control device of a hydrogen proportional valve provided in one embodiment of the present invention.

[0075] Wherein, as an example, the hydrogen pressure control device of the hydrogen proportional valve may include:

[0076] The parameter acquisition module 401 is used to respectively acquire an opening feedback parameter and a pressure feedback parameter when the hydrogen proportional valve discharges hydrogen, wherein the opening feedback parameter is a parameter fed back based on the armature stroke of the hydrogen proportional valve, and the pressure feedback parameter is a parameter fed back based on the exhaust port pressure of the hydrogen proportional valve;

[0077] The control module 402 is used to adjust the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the air pressure feedback parameter so that the exhaust port pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

[0078] Optionally, obtaining the opening feedback parameter includes:

[0079] Obtaining a magnetic field change parameter, wherein the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves;

[0080] After the magnetic field change parameter is converted into a voltage parameter, the opening feedback parameter is calculated according to the voltage parameter.

[0081] Optionally, adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter includes:

[0082] respectively determining control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter;

[0083] The control voltage value of the hydrogen proportional valve is calculated according to the control weight value.

[0084] The present invention also provides a hydrogen proportional valve, see Figure 5 , showing a structural schematic diagram of a hydrogen proportional valve provided by an embodiment of the present invention.

[0085] In one embodiment, the hydrogen proportional valve is suitable for the hydrogen pressure control method of the hydrogen proportional valve as described in the above embodiment.

[0086] As an example, the hydrogen proportional valve may include: a proportional valve body 1, an external cylinder 2 and a position sensor 3;

[0087] A cylinder piston 4 is provided in the cavity of the external cylinder 2, and a magnet 5 is provided in the cylinder piston 4. The cavity of the external cylinder 2 is connected to the cavity where the armature of the proportional valve body 1 is located through a hydraulic pipeline 6.

[0088] When the armature of the proportional valve body 1 moves, it changes the pressure of the oil pressure pipeline 6 to push the cylinder piston 4, so that the position sensor 3 detects the moving distance of the magnet 5 following the movement of the cylinder piston 4, and calculates the proportional valve stroke according to the moving distance.

[0089] In actual operation, the air pressure and valve core position inside the hydrogen proportional valve can be transmitted and fed back through an oil pressure pipe 6, wherein the oil pressure pipe 6 can pass through the cavity where the armature of the proportional valve body 1 is located and is connected to the armature valve core. The up and down stroke of the valve core links the movement of the piston inside it. During the movement, the internal pressure of the oil pressure pipe 6 can be changed, pushing the cylinder piston 4 in the cavity of the external cylinder 2 at the other end of the oil pressure pipe 6, so that the cylinder piston 4 drives the magnet 5 to move. Therefore, the magnetic field strength received by the position sensor 3 can convert the change value of the magnetic field strength into an electrical signal, and obtain the actual opening information.

[0090] In a practical operation mode, the position sensor 3 may be a linear position Hall sensor.

[0091] It should be noted that the up and down reciprocating motion of the armature of the proportional valve is converted into the pressure of the oil in the oil pipe through the connecting rod and the piston inside it. The oil has the incompressible characteristic and will transmit the pressure to the cylinder piston 4 with a magnet 5 at the other end, converting this part of the pressure into the actual movement of the piston. There is a magnet 5 at the other end of the connecting rod connected to the cylinder piston 4. The operation of the magnet 5 will cause the magnetic field intensity received by the position sensor 3 to change. The change in the magnetic field intensity is converted into a voltage change through the Hall effect inside the Hall sensor. The above process completes the process of converting the actual physical operation of the armature into an electrical signal.

[0092] In addition, the sealing structure at the two pistons of this patent is a single-axis reciprocating sealing structure, similar to the sealing structure in the field of bicycle hydraulic disc brakes or hydraulic rods.

[0093] After the cylinder piston 4 is pushed to move, in order to allow the cylinder piston 4 to be reset, refer to Figure 5 In one embodiment, a movable spring 7 is provided in the cavity of the external cylinder body 2, and the movable spring 7 is connected to the cylinder piston 4. The magnet 5 passes through the external cylinder body 2 so that the position sensor 3 can detect the moving distance of the magnet 5 when following the movement of the cylinder piston 4.

[0094] When the cylinder piston 4 moves, the movable spring 7 may be deformed. When it needs to be reset, the movable spring 7 may pull the cylinder piston 4 to reset it.

[0095] In addition, the following points should be noted during this process:

[0096] The movable spring 7 and the spring inside the proportional valve need to select appropriate spring coefficients and spring lengths. When the proportional valve is closed, these two springs are required to provide appropriate elastic force and preload to match the sealing performance under different hydrogen pressures.

[0097] Different specifications of hydrogen proportional valves have different intake pressures, and the intake pressures of different working conditions under the same fuel cell system are also different. This causes the oil pressure pipe 6 and the piston in the armature to have different forces due to different intake hydrogen pressures. The spring at the cylinder piston 4 where the magnet 5 is connected at the other end of the oil pressure pipe 6 needs to take into account the maximum intake hydrogen pressure within the intake specifications.

[0098] In this embodiment, the embodiment of the present invention provides a hydrogen proportional valve, and its beneficial effect is that: the present invention can connect the cylinder piston with a magnet in the external cylinder body and the armature of the hydrogen proportional valve through an oil pressure pipeline, so that when the armature moves, it pushes the cylinder piston to move to move the magnet, so that the actual opening of the armature can be determined according to the change of the magnetic field generated by the movement of the magnet, and then the actual opening of the armature and the exhaust port pressure are comprehensively controlled to make the exhaust port pressure of the hydrogen proportional valve reach the target hydrogen pressure value preset by the user. Through the above structure, the control of the armature can become linear, thereby improving the control accuracy.

[0099] Those skilled in the art can clearly understand that, for the sake of convenience and brevity of description, the specific working process of the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0100] Furthermore, an embodiment of the present application also provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the hydrogen pressure control method of the hydrogen proportional valve as described in the above embodiment is implemented.

[0101] Furthermore, an embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer-executable program, and the computer-executable program is used to enable a computer to execute the hydrogen pressure control method of the hydrogen proportional valve as described in the above embodiment.

[0102] It should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the embodiments of the present invention 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, and therefore cannot be understood as a limitation of the present invention. When an element such as a layer, region or substrate is referred to as being "on" or "above" another element, it can be directly on the other element, or there can also be an intermediate element. On the contrary, when an element is referred to as "directly on" or "above" another element, there is no intermediate element. It should also be understood that when an element is referred to as being "under" or "below" another element, it can be directly under or below the other element, or there can also be an intermediate element. On the contrary, when an element is referred to as being "directly under" or "below" another element, there is no intermediate element. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] Those skilled in the art will appreciate that the embodiments of the present application may also provide computer program products. Therefore, the present application may adopt the form of complete hardware embodiments, complete software embodiments, or embodiments in combination with software and hardware. Moreover, the present application may adopt the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program codes.

[0104] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), apparatuses, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0105] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0106] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0107] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for controlling hydrogen pressure of a hydrogen proportional valve, characterized in that: The method comprises: When the hydrogen proportional valve discharges hydrogen, an opening feedback parameter and an air pressure feedback parameter are respectively obtained, wherein the opening feedback parameter is a parameter fed back according to the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back according to the air pressure of the exhaust port of the hydrogen proportional valve; The control voltage value of the hydrogen proportional valve is adjusted according to the opening feedback parameter and the air pressure feedback parameter so that the air pressure at the exhaust port of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

2. The hydrogen pressure control method of a hydrogen proportional valve according to claim 1, characterized in that: The step of obtaining the opening feedback parameter includes: Obtaining a magnetic field change parameter, wherein the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves; After the magnetic field change parameter is converted into a voltage parameter, the opening feedback parameter is calculated according to the voltage parameter.

3. The hydrogen pressure control method of a hydrogen proportional valve according to claim 1, characterized in that: The step of adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter comprises: respectively determining control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter; The control voltage value of the hydrogen proportional valve is calculated according to the control weight value.

4. A hydrogen pressure control device for a hydrogen proportional valve, characterized in that: The device comprises: A parameter acquisition module, used to respectively acquire an opening feedback parameter and an air pressure feedback parameter when the hydrogen proportional valve discharges hydrogen, wherein the opening feedback parameter is a parameter fed back based on the armature stroke of the hydrogen proportional valve, and the air pressure feedback parameter is a parameter fed back based on the air pressure at the exhaust port of the hydrogen proportional valve; The control module is used to adjust the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the air pressure feedback parameter so that the exhaust port pressure of the hydrogen proportional valve reaches the target hydrogen pressure value preset by the user.

5. The hydrogen pressure control device of the hydrogen proportional valve according to claim 4, characterized in that: The step of obtaining the opening feedback parameter includes: Obtaining a magnetic field change parameter, wherein the magnetic field change parameter is a magnetic field change value generated when the armature of the hydrogen proportional valve drives the connected magnet to undergo a displacement change when the armature moves; After the magnetic field change parameter is converted into a voltage parameter, the opening feedback parameter is calculated according to the voltage parameter.

6. The hydrogen pressure control device of the hydrogen proportional valve according to claim 4, characterized in that: The step of adjusting the control voltage value of the hydrogen proportional valve according to the opening feedback parameter and the gas pressure feedback parameter comprises: respectively determining control weight values ​​of the opening degree feedback parameter and the air pressure feedback parameter; The control voltage value of the hydrogen proportional valve is calculated according to the control weight value.

7. A hydrogen proportional valve, characterized in that: The hydrogen proportional valve comprises: a proportional valve body, an external cylinder body and a position sensor; A cylinder piston is arranged in the cavity of the external cylinder, and a magnet is arranged in the cylinder piston. The cavity of the external cylinder is connected to the cavity where the armature of the proportional valve body is located through a hydraulic pipeline. The armature of the proportional valve body pushes the cylinder piston by changing the pressure of the oil pressure pipeline when it moves, so that the position sensor detects the moving distance of the magnet following the movement of the cylinder piston, and calculates the stroke of the proportional valve according to the moving distance.

8. The hydrogen proportional valve according to claim 7, characterized in that: A movable spring is arranged in the cavity of the external cylinder body, and the movable spring is connected to the cylinder body piston. The magnet passes through the external cylinder body so that the position sensor can detect the moving distance of the magnet when following the movement of the cylinder body piston.

9. An electronic device, comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the hydrogen pressure control method for a hydrogen proportional valve as described in any one of claims 1 to 3 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer-executable program, and the computer-executable program is used to enable a computer to execute the hydrogen pressure control method of a hydrogen proportional valve according to any one of claims 1 to 3.

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