A method and system for making and dispensing hydrogen

Abstract

The application discloses a kind of method and system for making and filling hydrogen, belong to the technical field of making and filling hydrogen integration, the method comprises: detecting water level and TDS value in water storage module, if there is no exception, electrolytic cell is driven to start work;Start PEM electrolytic cell to purge replacement pipeline gas, and adopt exhaust valve control pipeline pressure, exhaust valve pulse releases several times, and mixed gas is discharged;Keep closed state, continue to make hydrogen pressure, to pipeline pressure is within the preset pressure range, in the preset pressure range, the pressure filling of hydrogen storage device is carried out.The PEM electrolytic cell of the application, water storage module, power module, hydrogen filling module and main control module are integrated in one machine body, the operation is simple, safe and efficient, and can meet the hydrogen demand of hydrogen energy bicycle and other hydrogen energy terminal products, which can greatly save the time required for replacing hydrogen storage device and reduce the operating cost of vehicle.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hydrogen production and filling integration, and particularly relates to a hydrogen production and filling method and system. BACKGROUND

[0002] Water electrolysis hydrogen production refers to that water molecules are dissociated to generate oxygen and hydrogen under the action of direct current, and are discharged from the anode and cathode of an electrolytic cell respectively. According to the difference of the diaphragm material of the electrolytic cell, water electrolysis hydrogen production is usually divided into alkaline water electrolysis (AE), proton exchange membrane (PEM) water electrolysis and high-temperature solid oxide water electrolysis (SOEC). Compared with alkaline water electrolysis hydrogen production, PEM water electrolysis hydrogen production has higher working current density, higher overall efficiency, higher hydrogen volume fraction, higher gas pressure, faster dynamic response speed and can adapt to the volatility of renewable energy power generation, and is considered as a water electrolysis hydrogen production technology with great development prospect. At present, PEM water electrolysis hydrogen production technology has been applied and gradually promoted in the fields of hydrogen production on site, water electrolysis hydrogen production by renewable energy such as wind power, energy storage and the like.

[0003] The main components of a PEM water electrolysis cell are, from inside to outside, a proton exchange membrane, an anode and cathode catalyst layer, an anode and cathode gas diffusion layer, an anode and cathode end plate and the like. Among them, the diffusion layer, the catalyst layer and the proton exchange membrane form a membrane electrode, which is the main place of material transmission and electrochemical reaction of the entire water electrolysis cell, and the characteristics and structure of the membrane electrode directly affect the performance and service life of the PEM water electrolysis cell.

[0004] Under the condition of frequent start and stop of the PEM hydrogen production system, the concentration and pressure of hydrogen and oxygen change, which affects the safety of the PEM hydrogen production system, hydrogen production, quality and hydrogen filling efficiency, and also causes the performance attenuation of the core component membrane electrode. In addition, the pressure of the gas produced by the PEM hydrogen production system is unstable, and the solid-state hydrogen storage material releases heat energy when absorbing hydrogen. How to ensure the stability of the hydrogen pipeline pressure and improve the hydrogen filling efficiency are problems to be solved urgently. SUMMARY

[0005] The application aims to provide a hydrogen production and filling method and system to solve the problems in the background art.

[0006] Based on the above technical problems, the application provides a hydrogen production and filling method and system, which includes the following two aspects.

[0007] In a first aspect, the application provides a hydrogen production and filling method based on a hydrogen production and filling system. The hydrogen production and filling system includes a PEM electrolytic cell, a water storage module adapted to provide water required by the PEM electrolytic cell, a power supply module for supplying power to the PEM electrolytic cell, a gas-water separator and a drying device connected with the hydrogen outlet of the PEM electrolytic cell in sequence; and a hydrogen filling port connected with a hydrogen storage device is arranged at the outlet of the drying device.

[0008] The method comprises:

[0009] Detecting the water level and TDS value in the water storage module, and driving the electrolytic cell to start working if there is no abnormality;

[0010] Starting to purge the gas in the PEM electrolytic cell pipeline, and controlling the pipeline pressure by using an exhaust valve, wherein the exhaust valve is pulsed several times to release mixed gas and maintain the purity of the gas in the pipeline;

[0011] Maintaining the closed state, continuously producing hydrogen to increase the pressure, and performing pressure charging of the hydrogen storage device when the pipeline pressure reaches the preset pressure range.

[0012] Preferably or optionally, the method further comprises:

[0013] The PEM electrolytic cell continuously produces hydrogen at a predetermined power, and the pipeline pressure is continuously obtained in real time by using a gas pressure sensor;

[0014] Determining whether the pipeline pressure is greater than the upper limit value of the preset pressure range; if yes, increasing the rotation speed of the heat dissipation device, and performing the next step; if no, maintaining the current rotation speed of the heat dissipation device;

[0015] Determining whether the pipeline pressure is greater than a first pressure preset value, wherein the first pressure preset value is greater than the upper limit value of the preset pressure range; if yes, stopping hydrogen production, and performing the next step; if no, performing the previous step;

[0016] When the pressure is lower than the lower limit value of the preset pressure range after stopping hydrogen production, starting hydrogen production, performing the previous step, and determining that the charging is completed when the interval time between starting and stopping hydrogen production reaches a second threshold time.

[0017] After the charging is completed, performing a safety relief operation, stopping hydrogen production, opening the electromagnetic valve to release the pipeline gas, and restoring the normal pressure state.

[0018] Preferably or optionally, the predetermined power is a curve that changes with the hydrogen charging process.

[0019] Preferably or optionally, the method further comprises:

[0020] Obtaining the remaining pure water amount in the water storage module in real time by using a liquid level sensor, and determining whether the remaining pure water amount is lower than a second threshold; if yes, alarming the user to add pure water;

[0021] Obtaining the TDS value of the pure water in the water storage module in real time by using a TDS sensor, and determining whether the TDS value of the pure water is greater than a third threshold; if yes, alarming the user to replace the pure water;

[0022] The TDS value of the pure water in the water storage module is acquired again after a first predetermined time, and it is determined whether the TDS value of the pure water is greater than a third threshold value, the first predetermined time being at least sufficient for the user to complete the replacement of the pure water; if yes, the hydrogen production process is ended.

[0023] Preferably or optionally, the method further comprises:

[0024] The change of the color-changing drying indicator in the drying device is acquired in real time by a color sensor;

[0025] It is determined whether the water absorption of the drying device reaches a fourth threshold value based on the change of the color-changing drying indicator in the drying device;

[0026] If yes, the user is prompted to replace the drying component, and a backup drying component is enabled.

[0027] Preferably or optionally, the method further comprises:

[0028] The hydrogen concentration inside the closed box is acquired in real time by a hydrogen sensor; the closed box is adapted to accommodate the PEM electrolytic cell, the hydrogen charging module, and the pipeline between the PEM electrolytic cell and the hydrogen charging module;

[0029] It is determined whether the hydrogen concentration inside the closed box reaches a fifth threshold value; if yes, the hydrogen production is stopped, and an alarm information is sent.

[0030] Preferably or optionally, the method further comprises:

[0031] It is determined whether the hydrogen storage device is connected to the hydrogen storage port of the PEM electrolytic cell; if yes, the next step is executed;

[0032] After the hydrogen charging for a second predetermined time, the pressure inside the hydrogen storage device is acquired, and it is determined whether the pressure is less than a second pressure preset value; if yes, the pipeline between the PEM electrolytic cell and the hydrogen charging module is closed, and the hydrogen storage device is replaced.

[0033] In a second aspect, the present application further provides a hydrogen production and charging system, the system comprising:

[0034] A PEM electrolytic cell adapted to electrolyze water to produce hydrogen;

[0035] A water storage module connected to the water inlet of the PEM electrolytic cell and adapted to provide water required by the PEM electrolytic cell;

[0036] A power module electrically connected to the electrode plate of the PEM electrolytic cell and adapted to supply power to the PEM electrolytic cell;

[0037] The hydrogen filling module comprises, in sequence, a gas-water separator, a drying device, a pressure detection device, a venting device and a safety protection device connected with the hydrogen outlet of the PEM electrolytic cell; a hydrogen filling port connected with a hydrogen storage device is arranged at the outlet of the drying device;

[0038] The main control module is signal connected with the power module, the water storage module and the hydrogen filling module, and controls the power module, the water storage module and the hydrogen filling module.

[0039] Preferably or optionally, the water storage module is internally provided with a liquid level sensor and a TDS sensor; the liquid level sensor and the TDS sensor are signal connected with the main control module;

[0040] Preferably or optionally, the drying device is placed with a color-changing drying indicator, and a color sensor for detecting the color change of the color-changing drying indicator; and the color sensor is signal connected with the main control module;

[0041] Preferably or optionally, the pressure detection device and the venting device are respectively a gas pressure sensor and an exhaust valve arranged on the pipeline between the drying device and the hydrogen storage device; and the gas pressure sensor and the exhaust valve are signal connected with the main control module;

[0042] Preferably or optionally, the hydrogen storage device is further provided with a heat dissipation device, which is suitable for controlling the temperature environment when the hydrogen storage device is filled, and performs air cooling or water cooling on the bottle body of the hydrogen storage device, and part of the hydrogen storage device can be naturally cooled; the heat dissipation device is signal connected with the main control module.

[0043] Preferably or optionally, the system further comprises a display device, a wireless communication module and a background server; the display device, the wireless communication module and the background server are signal connected with the main control module;

[0044] Preferably or optionally, the system further comprises an alarm module; the alarm module is signal connected with the main control module.

[0045] The present application relates to a kind of method and system of making and filling hydrogen, compared with prior art, with the following advantages:

[0046] 1, the PEM electrolytic cell of the present application, water storage module, power module, hydrogen filling module and main control module are integrated in single body, it is simple to operate and has safety and high efficiency, can meet the needs of household, can greatly save the time needed for replacing hydrogen storage device, save social cost.

[0047] 2、The present application is provided with liquid level sensor and TDS sensor inside the water storage module, the liquid level sensor is used for detecting the pure water balance, the TDS sensor is used for detecting the TDS value of pure water, to ensure that the pure water in the water storage module meets the PEM electrolytic cell, and protects the core components in the PEM electrolytic cell.

[0048] 3、The present application sets color sensor to detect the running condition of the drying device, and adjusts the related parameters of the drying device in time, to ensure the dryness of the prepared hydrogen, to reach the high-purity hydrogen standard, and to ensure the hydrogen charging effect of the hydrogen storage device.

[0049] 4、The present application monitors the pressure change through the air pressure sensor, and the exhaust valve controls the pipeline pressure, to ensure that the pipeline pressure is kept in the preset pressure range as much as possible, and to improve the hydrogen charging safety and efficiency of the hydrogen storage device.

[0050] 5、The present application sets the heat dissipation device outside the hydrogen storage device, to realize the air cooling of the hydrogen storage device, to ensure the temperature stability of the hydrogen storage device in the hydrogen charging process, and to improve the hydrogen charging efficiency of the hydrogen storage device.

[0051] 6、The present application realizes local interface operation visualization, data display and command issuing, and local voice prompt through the display device, and realizes remote monitoring display through the wireless communication module, to facilitate user management and self-operation.

[0052] 7、The present application sets the alarm module, to timely inform the user of the running condition of the hydrogen production and charging system, and to improve the safety of the entire hydrogen production and charging system.

[0053] 8、The present application sets the hydrogen detection hydrogen storage device, to detect whether the hydrogen production and charging system leaks hydrogen, to stop in time, and to ensure the safety of the entire hydrogen production and charging system. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 It is a flowchart of one kind of hydrogen production and charging device in the embodiment 1 of the present application.

[0055] Figure 2 It is a flowchart of one kind of hydrogen production and charging method in the embodiment 1 of the present application. DETAILED DESCRIPTION

[0056] In the following description, a large number of specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, some technical features known in the art are not described to avoid obscuring the present application.

[0057] Embodiment 1

[0058] As shown in the accompanying drawings, Figure 1 ​Figure 1 A flowchart of a hydrogen production and filling system according to an embodiment of the present application is shown in FIG. 1. The hydrogen production and filling system includes a PEM electrolyzer, a water storage module, a power supply module, a hydrogen filling module, and a main control module.

[0059] The PEM electrolyzer is adapted to electrolyze water to produce hydrogen. The main components of the PEM electrolyzer, from the inside out, include a proton exchange membrane, cathode and anode catalyst layers, cathode and anode gas diffusion layers, and cathode and anode end plates. The diffusion layers, catalyst layers, and proton exchange membrane form a membrane electrode, which is the main site of material transport and electrochemical reaction in the entire water electrolyzer. The characteristics and structure of the membrane electrode directly affect the performance and service life of the PEM water electrolyzer. In this embodiment, the PEM electrolyzer is a commercially available product, and is not limited in detail.

[0060] The water storage module includes a pure water tank connected to the water inlet of the PEM electrolyzer, and a liquid level sensor and a TDS sensor disposed in the pure water tank. The pure water in the pure water tank is introduced into the PEM electrolyzer by a water pump to provide the water required by the PEM electrolyzer. The liquid level sensor is used to detect the remaining amount of pure water, and the TDS sensor is used to detect the TDS value of the pure water, to ensure that the pure water in the water storage module meets the requirements of the PEM electrolyzer and to protect the core components in the PEM electrolyzer.

[0061] The power supply module is electrically connected to the electrode plates of the PEM electrolyzer to supply power to the PEM electrolyzer. The power supply module includes a solid-state relay, a switching power supply, and a current and voltage detection circuit. The solid-state relay is a non-contact electronic switch with isolation function. The input end of the solid-state relay is directly connected to the alternating current, and the output end is connected to the input end of the switching power supply. In addition, the solid-state relay is connected to the main control module through a relay drive circuit, and the main control module is used to realize timely power-off of the power supply module to ensure the safety of the entire hydrogen production and filling system. The switching power supply is a high-frequency power conversion device that converts alternating current into constant-current direct current. In addition, the switching power supply is also connected to the main control module through an external control circuit to control the input current on both sides of the cathode and anode end plates of the PEM electrolyzer. The output end of the switching power supply is connected to the current and voltage detection circuit, which further stabilizes the current to ensure that the input current of the PEM electrolyzer is within a safe fluctuation range, further protecting the core components in the PEM electrolyzer. Of course, the power supply module is also connected to the main control module to supply power to the main control module.

[0062] The hydrogen filling module includes, in sequence, a gas-water separator, a drying device, a pressure detection device, a venting device, and a safety protection device connected to the hydrogen outlet of the PEM electrolyzer. A hydrogen filling port connected to a hydrogen storage device is provided at the outlet of the drying device.

[0063] The drying device is selected to be a drying device with a color-changing drying indicator placed inside, which can form a safety hazard in a traditional drying manner, and on the other hand, facilitates the user to observe the running condition of the drying device, and therefore, the color-changing drying indicator is provided with a color sensor for detecting the color change of the color-changing drying indicator; the color sensor is in signal connection with the main control module. The color sensor is arranged to detect the running condition of the drying device, and the related parameters of the drying device are adjusted in time to ensure the dryness of the prepared hydrogen gas, reach the high-purity hydrogen standard, and further ensure the hydrogen charging effect of the hydrogen storage device. The drying device is provided with at least two drying components, and when one drying device reaches or approaches a threshold value, the drying components are switched to avoid starting and stopping the PEM electrolytic cell due to replacement of the drying components during the preparation and hydrogen charging process.

[0064] In a further embodiment, the pressure detection device and the venting device are respectively a gas pressure sensor and an exhaust valve arranged on the pipeline between the drying device and the hydrogen storage device; and the gas pressure sensor and the exhaust valve are in signal connection with the main control module. The application monitors the pressure change through the gas pressure sensor, and controls the pipeline pressure through the exhaust valve to ensure that the pipeline pressure is kept in the preset pressure range as much as possible, and improves the hydrogen charging safety and efficiency of the hydrogen storage device.

[0065] The hydrogen storage device is further provided with a heat dissipation device suitable for the temperature environment control of the hydrogen storage device during charging, and the bottle body of the hydrogen storage device is subjected to air cooling or water cooling, and part of it can be naturally cooled; the heat dissipation device is in signal connection with the main control module. The temperature of the hydrogen storage device is lowered to ensure the temperature stability of the hydrogen storage device during the hydrogen charging process, and improve the hydrogen charging efficiency of the hydrogen storage device.

[0066] It should be noted that the filling interface between the hydrogen storage device and the dry hydrogen storage is sealed and connected by a detachable sealing quick connector. The sealing quick connector can be a traditional male and female connector. The embodiment provides a sealing quick connector, which comprises a female connector connected to the hydrogen storage device, a male connector connected to the hydrogen storage port of the drying device, an opening and closing slider arranged on the female connector and adapted to allow the female connector and the male connector to form a passage, an end cover with a hollow structure, a limiting sleeve fixedly installed on one side of the end cover, the male connector is inserted into the inside of the limiting sleeve, the female connector is inserted into the inside of the limiting sleeve while the opening and closing slider is prevented from being inserted into the inside of the limiting sleeve, a first elastic element allowing the male connector to move a predetermined distance along the axial direction of the male connector, a limiting groove arranged on the circumference of the male connector, and a clutch block inserted into the end cover and cooperating with the limiting groove to limit the position of the male connector. Wherein, the inner diameter of the limiting sleeve is less than or equal to the outer diameter of the female connector; the inner diameter of the limiting sleeve is greater than the outer diameter of the opening and closing slider. It is guaranteed that the female connector can be completely inserted into the limiting sleeve, and the opening and closing sleeve cannot be inserted into the limiting sleeve.

[0067] The safety protection device comprises a pressure switch and a pressure relief valve connected to the pipeline between the drying device and the hydrogen storage device. The pressure switch and the pressure relief valve act independently with respect to the main control module, and play a double protection role. When the pipeline pressure is detected to be too large, the pressure switch sends information to the main control module, cuts off the power supply of the power supply module, and then opens the pressure relief valve to discharge the hydrogen in the pipeline.

[0068] In further embodiments, the system further comprises a display device, a wireless communication module and a background server; and the display device, the wireless communication module, the background server and the main control module are signal connected. The local interface operation visualization, data display and command issuing, and local voice prompt are realized through the display device. The wireless communication module realizes remote monitoring display, which is convenient for user management and self-operation.

[0069] In further embodiments, the system further comprises an alarm module; the alarm module is signal connected with the main control module, and the alarm module comprises a buzzer connected with the main control module, a wireless communication module sending alarm prompt information to the display or remote monitoring, and a loudspeaker connected through a power amplification circuit. The operation of the hydrogen production and filling system is timely informed to the user, and the safety of the entire hydrogen production and filling system is improved.

[0070] In addition, the hydrogen production and supply system is located in a closed box or a relatively closed box, and a hydrogen sensor is arranged in the closed box and connected with the master control module. The hydrogen sensor detects the hydrogen concentration in the closed box, and an alarm is sent in time when the hydrogen concentration reaches a threshold value.

[0071] Embodiment 2

[0072] Based on the same inventive concept as the hydrogen production and supply system in the foregoing embodiment 1, the application also provides a hydrogen production and supply method, as shown in the following. Figure 2 The method comprises the following steps:

[0073] Step 1: detecting the water level and TDS value in the water storage module, and driving the electrolytic cell to start working if there is no abnormality;

[0074] Specifically, the water storage module comprises a pure water tank connected with the water inlet of the PEM electrolytic cell, and a liquid level sensor and a TDS sensor arranged in the pure water tank. The control method of the water storage module comprises: acquiring the remaining pure water amount in the water storage module in real time through the liquid level sensor, and determining whether the remaining pure water amount is lower than a second threshold value; the second threshold value is the safe water amount in the water storage module; if yes, an alarm is sent to inform the user to add pure water; acquiring the TDS value of the pure water in the water storage module in real time through the TDS sensor, and determining whether the TDS value of the pure water is greater than a third threshold value; if yes, an alarm is sent to inform the user to replace the pure water; and ensuring that the pure water in the water storage module meets the requirements of the PEM electrolytic cell and protects the core components in the PEM electrolytic cell.

[0075] In order to reduce the start-stop times of the PEM electrolytic cell, the control method of the water storage module further comprises: acquiring the TDS value of the pure water in the water storage module again at intervals of a first predetermined time, and determining whether the TDS value of the pure water is greater than the third threshold value; the third threshold value is the requirement for water quality when the PEM electrolytic cell is working, and in this embodiment, the TDS value of the third threshold value is preferably 3; if yes, the hydrogen production process is ended. The first predetermined time at least ensures that the user completes the replacement of pure water. The first predetermined time is related to the volume, safe electrolytic water amount, water consumption and other parameters in the PEM electrolytic cell. In order to appropriately prolong the first predetermined time, the electrolysis power of the PEM electrolytic cell can be reduced.

[0076] Step 2: starting the PEM electrolytic cell to blow and replace the gas in the pipeline, and using an exhaust valve to control the pipeline pressure. The exhaust valve is released several times in pulses to discharge the mixed gas.

[0077] Specifically, the PEM electrolyzer is started to produce hydrogen, and the hydrogen produced by the PEM electrolyzer is continuously discharged from the pipeline. Specifically, the pressure in the pipeline is controlled by the exhaust valve, and when the pressure reaches the first pressure preset value, the exhaust valve is opened in pulse mode at a certain interval, and the mixed gas is ejected and discharged under the action of pressure, so as to completely discharge the gas in the pipeline as much as possible, so as to improve the purity of hydrogen in the pipeline and ensure the hydrogen charging efficiency and quality.

[0078] Step 3, keep the closed state, continuously produce hydrogen and increase the pressure, until the pressure in the pipeline reaches the preset pressure range, and then perform pressure charging of the hydrogen storage device in the preset pressure range.

[0079] Specifically, the hydrogen storage device is a solid-state hydrogen storage device, and the hydrogen produced by the PEM electrolyzer is continuously discharged to make the pressure in the pipeline within the preset pressure range, so that the hydrogen storage device can be safely charged, and the charging rate is not too high, so that the heat dissipation of the hydrogen storage device is not timely, and the service life of the hydrogen storage device is affected.

[0080] It can be understood that the production end of the entire pipeline is the PEM electrolyzer, which continuously produces hydrogen; the consumption end is the hydrogen charging device, which consumes hydrogen in the pipeline by charging the hydrogen charging device; since the PEM electrolyzer is not suitable for frequent start and stop, and the hydrogen production speed is not stable, how to ensure the stability of the hydrogen pipeline pressure and improve the hydrogen charging efficiency has become a difficulty in the PEM electrolysis and hydrogen charging.

[0081] The embodiment proposes a dynamic balancing method, including the following steps: the PEM electrolyzer continuously produces hydrogen at a predetermined power, and the pressure in the pipeline is continuously acquired in real time by a pressure sensor; it is judged whether the pressure in the pipeline is greater than the upper limit value of the preset pressure range; if yes, the rotating speed of the heat dissipation device is increased, and the next step is performed; if not, the current rotating speed of the heat dissipation device is maintained; it is judged whether the pressure in the pipeline is greater than the first pressure preset value, wherein the first pressure preset value is greater than the upper limit value of the preset pressure range; if yes, the hydrogen production is stopped, and the next step is performed; if not, the previous step is performed; when the pressure is lower than the lower limit value of the preset pressure range after the hydrogen production is stopped, the hydrogen production is started, the previous step is performed, and until the interval time of start and stop of the hydrogen production reaches the first threshold time, it is determined that the charging is ended. After the charging is ended, a safety relief operation is performed, the hydrogen production is stopped, the electromagnetic valve is opened to empty the pipeline gas, and the normal pressure state is restored.

[0082] In addition, in order to further reduce the start-stop times of the PEM electrolyzer, the weight change of the hydrogen storage device before and after hydrogen charging can be obtained to determine whether the hydrogen storage device is fully charged. Therefore, the dynamic balance method further comprises: obtaining the weight difference of the hydrogen storage device before and after hydrogen charging, and determining whether the weight difference reaches a sixth threshold value. If yes, it is considered that the hydrogen storage device has completed the hydrogen charging process. The sixth threshold value is the mass change of the hydrogen storage device before and after hydrogen charging under standard hydrogen charging conditions, and the minimum value is generally taken as the reference standard.

[0083] It should be noted that the predetermined power is not a fixed value, and the predetermined power is a curve that changes with the hydrogen charging process. In this embodiment, since the hydrogen storage device changes with the internal pressure, the hydrogen storage alloy hydrogen absorption rate changes, and therefore the output of the hydrogen production power supply needs to be dynamically adjusted, so that the hydrogen production rate is also adjusted accordingly, following the change of the hydrogen absorption rate, to achieve a relatively balanced and stable pressure, and to reduce the start-stop of the PEM electrolyzer.

[0084] In this embodiment, by appropriately improving the heat dissipation performance of the hydrogen storage device, the hydrogen charging speed is improved, the pipeline hydrogen consumption is reduced, and the pipeline pressure is reduced to return to the normal preset pressure range, thereby avoiding frequent start-stop of the PEM electrolyzer; until the pipeline pressure is greater than the first pressure preset value, it is further determined whether the hydrogen storage device is fully charged or the equipment is malfunctioning. The first preset value is the safety pressure of the entire hydrogen production and charging system or less than the safety pressure of the entire hydrogen production and charging system, to avoid excessive pressure of the entire system and form a safety hazard. The pressure reduction operation includes cutting off the power supply and opening the exhaust valve to timely remove hydrogen; it should be noted that the power supply needs to be cut off before the exhaust valve is opened to ensure the safety of the entire hydrogen production and charging system.

[0085] In a further embodiment, since the solid-state hydrogen storage device will cause its hydrogen storage performance to decrease after being used for a certain number of cycles, it needs to be activated. Therefore, in order to further determine the usability of the hydrogen storage device, the method further comprises: determining whether the hydrogen storage device is connected to the hydrogen storage port of the PEM electrolyzer, and if yes, performing the next step; obtaining the internal pressure of the hydrogen storage device after charging hydrogen for a second predetermined time, and determining whether the pressure is less than a second pressure preset value. If yes, the pipeline between the PEM electrolyzer and the hydrogen charging module is closed, and the hydrogen storage device is replaced.

[0086] In a further embodiment, the method further comprises: obtaining the change of the color change drying indicator in the drying device in real time by a color sensor; determining whether the water absorption of the drying device reaches a fourth threshold value based on the change of the color change drying indicator in the drying device; the fourth threshold value is the water absorption performance of the drying device to ensure that the hydrogen gas meets the standard charging requirements. The color side of the color sensor can be used to determine whether the water absorption of the drying device reaches the fourth threshold value. If yes, the user is prompted to replace the drying component, and a backup drying component is enabled.

[0087] In a further embodiment, the method further comprises: acquiring the hydrogen concentration inside the closed box in real time by a hydrogen sensor; determining whether the hydrogen concentration inside the closed box reaches a fifth threshold value; if yes, alarming by a buzzer and a loudspeaker, and sending the alarm prompt information to a display or a remote monitor, the fifth threshold value being the maximum safe concentration of hydrogen, which is less than the limit explosive concentration of hydrogen.

[0088] The various changes and specific examples of the hydrogen production and filling system in the foregoing embodiment 1 are also applicable to the hydrogen production and filling method of the present embodiment. The implementation method of the hydrogen production and filling method of the present embodiment can be clearly understood by those skilled in the art through the foregoing detailed description of the hydrogen production and filling system. Therefore, for the sake of brevity of the description, the implementation method of the hydrogen production and filling method of the present embodiment will not be described in detail herein.

[0089] In addition, it should be noted that each specific technical feature described in the foregoing specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A method of making hydrogen comprising, The method is based on a hydrogen production and filling system; the hydrogen production and filling system comprises a PEM electrolyzer, a water storage module adapted to provide water required by the PEM electrolyzer, a power supply module for supplying power to the PEM electrolyzer, a gas-water separator and a drying device connected with the hydrogen outlet of the PEM electrolyzer in sequence; A hydrogen filling port connected with a hydrogen storage device is arranged at the outlet of the drying device; the hydrogen storage device is further provided with a heat dissipation device; The method comprises: Detecting the water level and TDS value in the water storage module, and driving the electrolyzer to start working if no abnormality is found; Starting to blow gas in the PEM electrolyzer purging pipeline, and controlling the pipeline pressure by using an exhaust valve, wherein the exhaust valve is pulsed to release several times to exhaust mixed gas; Maintaining a closed state, continuously producing hydrogen and increasing pressure, until the pipeline pressure reaches a preset pressure range, so that the pipeline pressure is within the preset pressure range for pressure filling of the hydrogen storage device; The method further comprises: Continuously producing hydrogen by the PEM electrolyzer at a predetermined power, and continuously acquiring the pipeline pressure in real time by using a gas pressure sensor; Judging whether the pipeline pressure is greater than the upper limit value of the preset pressure range; if yes, increasing the rotating speed of the heat dissipation device, and performing the next step; if no, maintaining the current rotating speed of the heat dissipation device; Judging whether the pipeline pressure is greater than a first pressure preset value, wherein the first pressure preset value is greater than the upper limit value of the preset pressure range; if yes, stopping hydrogen production, and performing the next step; if no, performing the previous step; When the pressure is lower than the lower limit value of the preset pressure range after stopping hydrogen production, starting hydrogen production, performing the previous step, until the interval time of starting and stopping hydrogen production reaches a second threshold time, and then it is determined that the filling is completed; After the filling is completed, performing a safety relief operation, closing the hydrogen production, opening the electromagnetic valve to exhaust the pipeline gas, and restoring the normal pressure state.

2. The method of claim 1 wherein, The predetermined power is a curve that changes with the hydrogen filling process.

3. The hydroprocessing method of claim 1 wherein, The method further comprises: Acquiring the remaining pure water amount in the water storage module in real time by using a liquid level sensor, and judging whether the remaining pure water amount is lower than a second threshold; if yes, alarming to inform the user to add pure water; Acquiring the TDS value of the pure water in the water storage module in real time by using a TDS sensor, and judging whether the TDS value of the pure water is greater than a third threshold; if yes, alarming to inform the user to replace the pure water; Acquiring the TDS value of the pure water in the water storage module again after a first predetermined time, and judging whether the TDS value of the pure water is greater than the third threshold; the first predetermined time at least allows the user to complete the replacement of the pure water; if yes, ending the hydrogen production process.

4. The hydroprocessing method of claim 1 wherein, The method further comprises: Acquiring the change of the color change drying indicator in the drying device in real time by using a color sensor; Judging whether the water absorption of the drying device reaches a fourth threshold based on the change of the color change drying indicator in the drying device; If yes, prompting the user to replace the drying part, and enabling a standby drying part.

5. The method of claim 1 wherein, The method further comprises: Acquiring the hydrogen concentration inside a closed box in real time by using a hydrogen sensor; the closed box is adapted to accommodate the PEM electrolyzer, part of the hydrogen filling module, and the pipeline between the PEM electrolyzer and the hydrogen filling module; Judging whether the hydrogen concentration inside the closed box reaches a fifth threshold; if yes, stopping hydrogen production, and issuing an alarm information.

6. The hydroprocessing method of claim 1 wherein, The method further comprises: Judging whether the hydrogen storage device is connected with the hydrogen storage port of the PEM electrolytic cell, if yes, executing the next step; After the hydrogen filling for the second predetermined time, obtaining the pressure inside the hydrogen storage device, and judging whether the pressure is less than the second pressure preset value, if yes, closing the pipeline between the PEM electrolytic cell and the hydrogen filling module, and replacing the hydrogen storage device.

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