A device for online concentration detection of hydrogen gas supply of hydrogen fuel cell

Abstract

The present invention discloses a device for online concentration detection of hydrogen gas supply of a hydrogen fuel cell, belonging to the field of hydrogen fuel cells. A device for online concentration detection of hydrogen gas supply of a hydrogen fuel cell comprises a hydrogen fuel cell body, an air inlet pipe is fixedly provided on one side of the hydrogen fuel cell body, the air inlet pipe is fixed to the bottom of a first hydrogen tank, a drive assembly is installed in the first hydrogen tank, a hydrogen concentration detection assembly is installed in the first hydrogen tank, an air outlet pipe is provided on one side of the first hydrogen tank, the air outlet pipe is connected to a second hydrogen tank, and a second gas blocking assembly is provided in the second hydrogen tank. The present invention solves the problem that the prior art is subject to interference from environmental factors, resulting in increased measurement errors and thus causing false alarms. The present invention avoids damage to the battery, can monitor the concentration of hydrogen in the hydrogen fuel cell body in real time, effectively prevents hydrogen leakage or explosion, and ensures that the hydrogen fuel cell body always operates in the best state, thereby improving the accuracy of the measurement.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cells, and in particular to a device for online concentration detection of hydrogen gas supply of a hydrogen fuel cell. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis, supplying hydrogen and oxygen to the anode and cathode respectively. After hydrogen diffuses outward through the anode and reacts with the electrolyte, it releases electrons through an external load to reach the cathode.

[0003] Chinese patent publication number CN117199448A discloses a fuel cell PACK internal hydrogen concentration detection device and early warning method. The early warning method includes comparing the maximum detected hydrogen concentration with a safety threshold and responding with different actions based on the engine status. This can more efficiently perform targeted detection of hydrogen accumulation concentration in the pack for each engine in different operating scenarios, avoiding the risk of false alarms and alarm delays caused by the fixed position of the hydrogen concentration sensor, and reducing the safety hazards of hydrogen accumulation.

[0004] In actual use, the above patent directly obtains the hydrogen concentration value through a hydrogen concentration sensor and compares the hydrogen concentration value with a preset safety threshold. However, the hydrogen concentration sensor will be interfered with by environmental factors such as temperature during use, which will lead to increased measurement errors and thus cause false alarms. Therefore, it does not meet existing needs. In this regard, we propose an online concentration detection device for hydrogen fuel cell hydrogen supply. Summary of the Invention

[0005] The purpose of the present invention is to provide a device for online concentration detection of hydrogen supply of a hydrogen fuel cell. When an abnormal hydrogen concentration value is detected, the device can immediately stop supplying hydrogen to the hydrogen fuel cell body to avoid untimely processing, resulting in continuous supply of hydrogen to the hydrogen fuel cell body, causing damage to the battery, and thus affecting the service life of the battery. It can monitor the concentration of hydrogen in the hydrogen fuel cell body in real time, effectively prevent hydrogen leakage or explosion, and can accurately adjust the concentration according to changes in hydrogen concentration to ensure that the hydrogen fuel cell body always operates in the best state, avoid concentration fluctuations that lead to performance degradation or failure of the hydrogen fuel cell body, and can correct measurement errors caused by environmental factors, thereby improving the accuracy of measurement, solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a device for online concentration detection of hydrogen gas supply of a hydrogen fuel cell, comprising a hydrogen fuel cell body, an air inlet pipe fixedly provided on one side of the hydrogen fuel cell body, a fixing plate fixed in the air inlet pipe, a second air inlet hole provided on the fixing plate, the air inlet pipe fixed to the bottom of a first hydrogen tank, a drive assembly installed in the first hydrogen tank, a hydrogen concentration detection assembly installed on the inner wall of the first hydrogen tank, an audible and visual alarm provided on the top of the first hydrogen tank, an air outlet pipe provided on one side of the first hydrogen tank, the air outlet pipe being connected to a second hydrogen tank, a second air blocking assembly provided in the second hydrogen tank;

[0007] The driving assembly includes a movable plate and a first air inlet hole. The movable plate is provided with the first air inlet hole, and the first air inlet hole and the second air inlet hole are arranged alternately.

[0008] Hydrogen concentration detection component, including:

[0009] The sensor is used to detect the hydrogen concentration in the first hydrogen tank in real time and collect the temperature data value in the first hydrogen tank in real time, and dynamically adjust the hydrogen concentration collection frequency according to the real-time acquired temperature data value and the corresponding hydrogen concentration value.

[0010] Preferably, the driving assembly also includes a cylinder, a push rod, a connecting rod and a first air-blocking assembly. The output end of the cylinder is connected to the push rod, the bottom of the push rod is fixed to the first air-blocking assembly, a connecting rod is fixed to the bottom of the first air-blocking assembly, the bottom of the connecting rod passes through the fixed plate and is connected to the movable plate, and the connecting rod is movably connected to the fixed plate.

[0011] Preferably, the first air blocking assembly includes a support plate, a first support rod and a first blocking block. The support plate is fixed to the bottom of the push rod. The first support rod is fixed to the side of the support plate close to the air outlet pipe. The first blocking block is fixed on the first support rod. The first blocking block is arranged close to the air outlet pipe.

[0012] Preferably, the second gas blocking assembly includes a fixed sleeve, a spring, a telescopic rod, a piston, a second support rod and a second block. The fixed sleeve is arranged on the top of the second hydrogen tank, and a spring is arranged in the fixed sleeve. The spring is fixed on the telescopic rod. The end of the telescopic rod away from the fixed sleeve is installed on the piston. A second support rod is provided on one side of the piston, and a second block is fixed on the second support rod. An air outlet is provided on the side of the second hydrogen tank close to the second block, and the second block is arranged close to the air outlet.

[0013] Preferably, the hydrogen concentration detection component further includes:

[0014] The data processing module is used to process the hydrogen concentration data collected by the data acquisition module and record the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value;

[0015] The data analysis module is used to analyze the processed hydrogen concentration data and send out an alarm signal when the hydrogen concentration value in the first hydrogen tank exceeds a set concentration threshold.

[0016] Preferably, the process of collecting data by the sensor includes:

[0017] extracting the temperature data value in the first hydrogen tank in real time;

[0018] Real-time collection of the hydrogen concentration value in the first hydrogen tank corresponding to each temperature data value collection moment;

[0019] Obtaining a hydrogen concentration collection frequency adjustment coefficient using the temperature data value and a hydrogen concentration value in the first hydrogen tank corresponding to each temperature data value collection moment;

[0020] The hydrogen concentration acquisition frequency adjustment coefficient is obtained by the following formula:

[0021] ;

[0022] Where K represents the hydrogen concentration acquisition frequency adjustment coefficient; ΔT represents the temperature deviation between the current temperature value and the preset temperature reference value; ΔC represents the hydrogen concentration deviation between the current hydrogen concentration value and the preset hydrogen concentration reference value; ΔT max Indicates the expected maximum temperature deviation; ΔC max Indicates the expected maximum hydrogen concentration deviation; ΔT y Indicates the preset temperature deviation threshold; ΔC y represents the preset hydrogen concentration deviation threshold; α represents the temperature acquisition sensitivity of the temperature sensor; β represents the hydrogen concentration acquisition sensitivity; r represents the first adjustment coefficient, which is used to control the change rate of the temperature acquisition sensitivity; δ represents the second adjustment coefficient, which is used to control the change rate of the hydrogen concentration acquisition sensitivity;

[0023] The current hydrogen concentration collection frequency is adjusted using the hydrogen concentration collection frequency adjustment coefficient, wherein the adjusted hydrogen concentration collection frequency is obtained by the following formula:

[0024] ;

[0025] Among them, F ad Indicates the adjusted hydrogen concentration collection frequency; F b Indicates the hydrogen concentration collection frequency before adjustment; K indicates the hydrogen concentration collection frequency adjustment coefficient; K y Indicates the preset hydrogen concentration acquisition frequency adjustment coefficient threshold; λ indicates the coefficient adjustment factor, which is used to control the speed at which the acquisition frequency changes with the hydrogen concentration acquisition frequency adjustment coefficient K; F maxIndicates the maximum allowed frequency for hydrogen concentration collection.

[0026] Preferably, the sensor comprises:

[0027] A hydrogen concentration detector, used to set a hydrogen detection cycle and perform real-time detection of the hydrogen concentration in the first hydrogen tank according to the hydrogen detection cycle;

[0028] The temperature sensor is used to collect the temperature inside the first hydrogen tank in real time.

[0029] Preferably, the data analysis module specifically includes:

[0030] Set the hydrogen concentration difference threshold between two adjacent detection cycles, compare the detected hydrogen concentration values according to the detection cycle, and determine whether the hydrogen concentration value is in an increasing state;

[0031] If it is determined that the hydrogen concentration value has increased, determine whether the difference between the hydrogen concentration values corresponding to the periods before and after the increase is greater than the set threshold;

[0032] If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is greater than the set threshold, the predicted hydrogen concentration value is obtained after a first preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise;

[0033] If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is not greater than the set threshold, the predicted hydrogen concentration value is obtained after a second preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise, wherein the first preset period of time is greater than or equal to the second preset period of time;

[0034] It is determined whether the predicted hydrogen concentration value is greater than a preset hydrogen concentration threshold value. If it is determined that the predicted hydrogen concentration value is greater than the preset hydrogen concentration threshold value, an audible and visual alarm is issued through the audible and visual alarm device.

[0035] Preferably, the data processing module includes:

[0036] Preset compensation curve, which represents the correlation between temperature and concentration compensation parameters;

[0037] Searching for a concentration compensation parameter that matches the temperature on a preset compensation curve, compensating the hydrogen concentration using the concentration compensation parameter, and obtaining the treated hydrogen concentration;

[0038] The detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are recorded, and the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are stored according to the set detection cycle.

[0039] Preferably, it also includes a dust-proof component, which includes an exhaust pipe, the exhaust pipe is horizontally arranged outside the second hydrogen tank, one end of the exhaust pipe is connected to the air outlet, the exhaust pipe is configured as a square pipe, the cross-sectional area of the exhaust pipe outlet is larger than the air outlet area, a dust-proof plate is provided on the outlet side of the exhaust port, the dust-proof plate is hingedly connected to the inner wall of the exhaust pipe, a driving rod is provided on the side of the dust-proof plate close to the air outlet, one end of the driving rod is hingedly connected to the side wall of the dust-proof plate, and the other end of the driving rod is hingedly connected to the side wall of the moving block, the moving block is provided in the exhaust pipe, a number of rollers are provided on the outer wall of the moving block, the rollers are in contact with the inner wall of the exhaust pipe, a number of elastic ropes are provided on the inner wall of the dust-proof plate, the elastic ropes are connected to the inner wall of the exhaust pipe at one end away from the dust-proof plate, a sealing block is provided on the side of the moving block away from the driving rod, one end of the sealing block extends into the air outlet, a limiting ring is provided on the outer wall of the sealing block, a sealing groove is provided on the side of the limiting ring close to the air outlet, and a sealing ring is provided in the sealing groove.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] When the present invention detects an abnormal hydrogen concentration value, it starts the driving component to move the movable plate in the driving component upward and contact the fixed plate, so that the air inlet pipe is in a sealed state. At this time, the first hydrogen tank no longer supplies hydrogen to the hydrogen fuel cell main body, so as to avoid untimely processing leading to continuous supply of hydrogen to the hydrogen fuel cell main body, causing damage to the battery, and thus affecting the service life of the battery. The hydrogen concentration value is detected and analyzed by the hydrogen concentration detection component, so that the concentration of hydrogen in the hydrogen fuel cell main body can be monitored in real time, and hydrogen leakage or explosion can be effectively prevented. By predicting the hydrogen concentration value, the concentration can also be accurately adjusted according to the change of hydrogen concentration, so as to ensure that the hydrogen fuel cell main body always operates in the best state, and avoid concentration fluctuations causing performance degradation or failure of the hydrogen fuel cell main body. By performing temperature compensation processing on the collected hydrogen concentration data, the measurement error caused by environmental factors can be corrected, thereby improving the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of the overall structure of the device for online concentration detection of hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0043] Figure 2 This is a diagram showing the internal structure of the first hydrogen tank of the device for online concentration detection of hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0044] Figure 3 A schematic diagram of a driving assembly for an on-line concentration detection device for hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0045] Figure 4 A schematic diagram of a portion of the structure of an apparatus for online concentration detection of hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0046] Figure 5 A diagram showing the internal structure of the second hydrogen tank of the device for online concentration detection of hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0047] Figure 6 A schematic diagram of the second gas blocking component of the device for online concentration detection of hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0048] Figure 7 A schematic diagram of a hydrogen concentration detection assembly for an online concentration detection device for hydrogen gas supply to a hydrogen fuel cell of the present invention;

[0049] Figure 8 A schematic diagram of a dust-proof assembly for an online concentration detection device for hydrogen gas supply to a hydrogen fuel cell according to the present invention;

[0050] Figure 9 For the present invention Figure 8 A magnified view of the structure at center A.

[0051] In the figure: 1. hydrogen fuel cell body; 2. first hydrogen tank; 3. drive assembly; 31. cylinder; 32. push rod; 33. connecting rod; 34. movable plate; 35. first air inlet; 36. first air blocking assembly; 361. support plate; 362. first support rod; 363. first blocking block; 4. air outlet pipe; 5. second hydrogen tank; 6. air inlet pipe; 7. hydrogen concentration detection assembly; 8. fixed plate; 81. second air inlet; 9. second air blocking assembly; 91. fixed sleeve; 92. spring; 93. telescopic rod; 94. piston; 95. second support rod; 96. second blocking block; 10. sound and light alarm; 111. exhaust pipe; 112. dustproof plate; 113. drive rod; 114. moving block; 115. roller; 116. elastic rope; 117. sealing block; 118. limit ring; 119. sealing ring. DETAILED DESCRIPTION

[0052] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0053] In order to solve the problem that the existing technology directly obtains the hydrogen concentration value through the hydrogen concentration sensor during use and compares the hydrogen concentration value with the preset safety threshold, the hydrogen concentration sensor will be affected by environmental factors such as temperature and humidity during use, which will lead to increased measurement errors and thus cause false alarms. Figure 1-Figure 7 , this embodiment provides the following technical solutions:

[0054] A device for online concentration detection of hydrogen supply of a hydrogen fuel cell includes a hydrogen fuel cell body 1, an air inlet pipe 6 is fixedly provided on one side of the hydrogen fuel cell body 1, a fixing plate 8 is fixed inside the air inlet pipe 6, a second air inlet hole 81 is provided on the fixing plate 8, the air inlet pipe 6 is fixed to the bottom of a first hydrogen tank 2, a drive assembly 3 is installed in the first hydrogen tank 2, a hydrogen concentration detection assembly 7 is installed on the inner wall of the first hydrogen tank 2, an audible and visual alarm 10 is provided on the top of the first hydrogen tank 2, an air outlet pipe 4 is provided on one side of the first hydrogen tank 2, the air outlet pipe 4 is connected to the second hydrogen tank 5, and a second gas blocking assembly 9 is provided in the second hydrogen tank 5.

[0055] The driving assembly 3 includes a cylinder 31, a push rod 32, a connecting rod 33, a movable plate 34, a first air inlet hole 35 and a first air blocking assembly 36. The output end of the cylinder 31 is connected to the push rod 32, and the bottom of the push rod 32 is fixed to the first air blocking assembly 36. The bottom of the first air blocking assembly 36 is fixed with a connecting rod 33, and the bottom of the connecting rod 33 passes through the fixed plate 8 and is connected to the movable plate 34. The connecting rod 33 is movably connected to the fixed plate 8. A first air inlet hole 35 is provided on the movable plate 34, and the first air inlet hole 35 and the second air inlet hole 81 are arranged alternately. When an abnormal hydrogen concentration in the first hydrogen tank 2 is detected, the starting cylinder 31 drives the push rod 32 to move upward, so that the movable plate 34 moves upward and contacts the fixed plate 8. Since the first air inlet hole 35 and the second air inlet hole 81 are arranged alternately, the air inlet pipe 6 is in a sealed state at this time, and the first hydrogen tank 2 no longer supplies hydrogen to the hydrogen fuel cell body 1.

[0056] The first gas blocking assembly 36 includes a support plate 361, a first support rod 362 and a first blocking block 363. The support plate 361 is fixed to the bottom of the push rod 32. The first support rod 362 is fixed to the side of the support plate 361 close to the outlet pipe 4. The first blocking block 363 is fixed on the first support rod 362. The first blocking block 363 is arranged close to the outlet pipe 4. When the push rod 32 moves upward, it drives the support plate 361 to move upward, so that the first blocking block 363 leaves the outlet pipe 4. At this time, the outlet pipe 4 is opened, and the hydrogen in the first hydrogen tank 2 is transferred to the second hydrogen tank 5.

[0057] The second gas blocking assembly 9 includes a fixed sleeve 91, a spring 92, a telescopic rod 93, a piston 94, a second support rod 95 and a second blocking block 96. The fixed sleeve 91 is arranged on the top of the second hydrogen tank 5. A spring 92 is arranged in the fixed sleeve 91, and the spring 92 is fixed on the telescopic rod 93. The end of the telescopic rod 93 away from the fixed sleeve 91 is installed on the piston 94. A second support rod 95 is arranged on one side of the piston 94. A second blocking block 96 is fixed on the second support rod 95. An air outlet is provided on the side of the second hydrogen tank 5 close to the second blocking block 96. The second blocking block 96 is arranged close to the air outlet. When hydrogen continues to enter the second hydrogen tank 5 through the outlet pipe 4 When the pressure in the second hydrogen tank 5 increases, the piston 94 is pushed upward. At this time, the second support rod 95 moves upward with the piston 94, driving the second blocking block 96 to move upward, opening the air outlet, and discharging excess hydrogen, which can prevent the pressure in the second hydrogen tank 5 from increasing and exceeding the limit that the second hydrogen tank 5 can withstand, causing the second hydrogen tank 5 to explode. Limit blocks are set below the first blocking block 363 and the second blocking block 96, and the limit blocks are respectively set on the inner walls of the first hydrogen tank 2 and the second hydrogen tank 5 to prevent the first blocking block 363 and the second blocking block 96 from being unobstructed when they descend, and cannot block the air outlet pipe 4 and the air outlet.

[0058] The hydrogen concentration detection component 7 includes:

[0059] The sensor is used to detect the hydrogen concentration in the first hydrogen tank 2 in real time and collect the temperature data value in the first hydrogen tank 2 in real time;

[0060] The data processing module is used to process the hydrogen concentration data collected by the data acquisition module and record the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value;

[0061] The data analysis module is used to analyze the processed hydrogen concentration data and send out an alarm signal when the hydrogen concentration value in the first hydrogen tank 2 exceeds a set concentration threshold.

[0062] Sensors, including:

[0063] A hydrogen concentration detector, used to set a hydrogen detection cycle and perform real-time detection of the hydrogen concentration in the first hydrogen tank 2 according to the hydrogen detection cycle;

[0064] The temperature sensor is used to collect the temperature data value in the first hydrogen tank 2 in real time.

[0065] Preferably, the process of collecting data by the sensor includes:

[0066] Real-time extraction of temperature data values obtained by temperature sensors;

[0067] Real-time collection of the hydrogen concentration value in the first hydrogen tank 2 corresponding to each temperature data value collection moment;

[0068] Obtaining a hydrogen concentration acquisition frequency adjustment coefficient using the temperature data value and the hydrogen concentration value in the first hydrogen tank 2 corresponding to each temperature data value acquisition moment;

[0069] The hydrogen concentration acquisition frequency adjustment coefficient is obtained by the following formula:

[0070] ;

[0071] Where K represents the hydrogen concentration acquisition frequency adjustment coefficient; ΔT represents the temperature deviation between the current temperature value and the preset temperature reference value; ΔC represents the hydrogen concentration deviation between the current hydrogen concentration value and the preset hydrogen concentration reference value; ΔT max Indicates the expected maximum temperature deviation; ΔC max Indicates the expected maximum hydrogen concentration deviation; ΔT y Indicates the preset temperature deviation threshold; ΔC y represents the preset hydrogen concentration deviation threshold; α represents the temperature acquisition sensitivity of the temperature sensor; β represents the hydrogen concentration acquisition sensitivity; r represents the first adjustment coefficient, which is used to control the rate of change of the temperature acquisition sensitivity; δ represents the second adjustment coefficient, which is used to control the rate of change of the hydrogen concentration acquisition sensitivity. The optimal value range of the first adjustment coefficient and the second adjustment coefficient needs to be determined and adjusted according to specific application requirements through experiments and debugging.

[0072] In the above mathematical model and Normalize the temperature and concentration deviations to the interval [0, 1], and at the same time, and Use the logistic function to smoothly adjust the temperature sensitivity and hydrogen concentration sensitivity; when ΔT is close to ΔT y When ΔT is much larger than ΔT, the sensitivity increases gradually. y When ΔC approaches ΔC, the sensitivity tends to be stable, and the rate of change of temperature sensitivity is controlled by r. y When ΔC is much larger than ΔC, the sensitivity increases gradually. y When the sensitivity reaches a certain value, δ is used to control the rate of change of the concentration sampling sensitivity. The temperature deviation and concentration deviation are multiplied together to obtain the overall adjustment coefficient K. Because both components are smoothed using the logistic function, the value of K changes smoothly with changes in temperature and concentration.

[0073] The current hydrogen concentration collection frequency is adjusted using the hydrogen concentration collection frequency adjustment coefficient, wherein the adjusted hydrogen concentration collection frequency is obtained by the following formula:

[0074] ;

[0075] Among them, F ad Indicates the adjusted hydrogen concentration collection frequency; F b Indicates the hydrogen concentration collection frequency before adjustment; K indicates the hydrogen concentration collection frequency adjustment coefficient; K y represents the preset hydrogen concentration acquisition frequency adjustment coefficient threshold; λ represents the coefficient adjustment factor, which is used to control the speed of change of the acquisition frequency with the hydrogen concentration acquisition frequency adjustment coefficient K, and the optimal value range of the coefficient adjustment factor needs to be determined and adjusted according to specific application requirements through experiments and debugging; F max Indicates the maximum allowed frequency for hydrogen concentration collection.

[0076] In the above formula Indicates the adjustable range of acquisition frequency; Use the logistic function to smoothly adjust the acquisition frequency. When K is close to K y When K is much larger than K y When the acquisition frequency approaches f max λ controls the rate at which the acquisition frequency changes with K.

[0077] The technical effect of the above-mentioned technical solution is that it extracts temperature and hydrogen concentration data from temperature sensors in real time and uses this data to calculate the hydrogen concentration acquisition frequency adjustment coefficient K. The K value reflects the degree of deviation between the current temperature and hydrogen concentration and preset reference values, thereby enabling adaptive adjustment of the hydrogen concentration acquisition frequency. This adaptive mechanism ensures that the acquisition frequency can be dynamically adjusted as the temperature and hydrogen concentration change, optimizing data acquisition accuracy and efficiency. The solution uses a logistic function to smoothly adjust the temperature sensitivity and hydrogen concentration sensitivity. The logistic function has a smooth transition characteristic, ensuring that the sensitivity gradually increases when the temperature and concentration deviation approaches the preset threshold and stabilizes when the deviation is significantly greater than the threshold. This smooth transition helps avoid abrupt changes in the acquisition frequency, thereby improving system stability. The solution introduces multiple adjustment parameters (such as α, β, r, δ, and λ). These parameters can be experimented and debugged according to specific application requirements to determine the optimal value range. This parameter adjustability enables the solution to adapt to different operating environments and conditions, enhancing the system's flexibility and applicability. By dynamically adjusting the frequency of hydrogen concentration acquisition, this solution can ensure data accuracy while reducing unnecessary acquisition times, thereby optimizing resource utilization. This helps extend the lifespan of the sensor and the entire system, reducing maintenance costs. When temperature and hydrogen concentration change significantly, the solution can quickly adjust the acquisition frequency to acquire data more frequently, thereby improving the system's response to changes. This is particularly important for hydrogen concentration monitoring systems that require timely monitoring and early warning. By comprehensively considering both temperature and hydrogen concentration factors and combining the smooth adjustment characteristics of the logistic function, the solution can more accurately reflect the actual system status, thereby enhancing system reliability. This helps reduce false alarms and missed alarms, improving overall system performance.

[0078] At the same time, calculate F ad The purpose of the adjusted hydrogen concentration collection frequency is to dynamically adjust the hydrogen concentration collection frequency based on real-time temperature data and the corresponding hydrogen concentration values. This adjustment mechanism is based on a complex mathematical model and parameters, including temperature deviation, hydrogen concentration deviation, temperature collection sensitivity, hydrogen concentration collection sensitivity, and an adjustment coefficient. By calculating the hydrogen concentration collection frequency adjustment coefficient, K, we can reflect the degree of deviation between the current temperature and hydrogen concentration and the preset reference values, and how these deviations affect the collection frequency adjustment.

[0079] Specifically, calculate F ad The purposes of (adjusted hydrogen concentration sampling frequency) include:

[0080] Optimizing response speed: When temperature and hydrogen concentration change significantly, by increasing the acquisition frequency, the system can respond to these changes more quickly, providing more accurate and timely data.

[0081] Resource efficiency: When the temperature and hydrogen concentration are relatively stable, reducing the acquisition frequency can reduce unnecessary calculations and data processing, thereby improving resource utilization efficiency.

[0082] Balancing accuracy and efficiency: By dynamically adjusting the acquisition frequency, the system can maximize efficiency while ensuring data accuracy. This helps reduce energy consumption and costs while meeting application requirements.

[0083] In summary, this technical solution provides a more accurate, efficient and reliable solution for the hydrogen concentration monitoring system through technical effects such as adaptive adjustment of acquisition frequency, smooth transition and stability, parameter adjustability and flexibility, optimized resource utilization, improved system response speed and enhanced system reliability.

[0084] Data analysis module, specifically including:

[0085] Set the hydrogen concentration difference threshold between two adjacent detection cycles, compare the detected hydrogen concentration values according to the detection cycle, and determine whether the hydrogen concentration value is in an increasing state;

[0086] Obtaining a hydrogen concentration value corresponding to a current cycle and a hydrogen concentration value corresponding to a previous cycle, performing a subtraction between the hydrogen concentration value corresponding to the current cycle and the hydrogen concentration value corresponding to the previous cycle to obtain a hydrogen concentration difference, and determining whether the hydrogen concentration difference is greater than zero. If so, determining that the hydrogen concentration has increased; if not, determining that the hydrogen concentration has not increased.

[0087] If it is determined that the hydrogen concentration value has increased, determine whether the difference between the hydrogen concentration values corresponding to the periods before and after the increase is greater than the set threshold;

[0088] If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is greater than the set threshold, the predicted hydrogen concentration value is obtained after a first preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise;

[0089] If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is not greater than the set threshold, the predicted hydrogen concentration value is obtained after a second preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise, wherein the first preset period of time is greater than or equal to the second preset period of time;

[0090] It is determined whether the predicted hydrogen concentration value is greater than a preset hydrogen concentration threshold value. If it is determined that the predicted hydrogen concentration value is greater than the preset hydrogen concentration threshold value, an audible and visual alarm is issued through the audible and visual alarm device 10.

[0091] Data processing module, including:

[0092] Preset compensation curve, which represents the correlation between temperature and concentration compensation parameters;

[0093] Searching for a concentration compensation parameter that matches the temperature on a preset compensation curve, compensating the hydrogen concentration using the concentration compensation parameter, and obtaining the treated hydrogen concentration;

[0094] The detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are recorded, and the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are stored according to the set detection cycle.

[0095] like Figure 8 、 Figure 9 As shown, it also includes a dustproof component, which includes an exhaust pipe 111. The exhaust pipe 111 is horizontally arranged outside the second hydrogen tank 5. One end of the exhaust pipe 111 is connected to the air outlet. The exhaust pipe 111 is configured as a square tube. The cross-sectional area of the exhaust pipe 111 outlet is larger than the air outlet area. A dustproof plate 112 is provided on the outlet side of the exhaust port. The dustproof plate 112 is hingedly connected to the inner wall of the exhaust pipe 111. A driving rod 113 is provided on the side of the dustproof plate 112 close to the air outlet. One end of the driving rod 113 is hingedly connected to the side wall of the dustproof plate 112, and the other end of the driving rod 113 is hingedly connected to the side wall of the moving block 114. The movable block 114 is arranged in the exhaust pipe 111, and a plurality of rollers 115 are arranged on the outer wall of the movable block 114. The rollers 115 are in contact with the inner wall of the exhaust pipe 111. A plurality of elastic ropes 116 are arranged on the inner wall of the dustproof plate 112. The elastic rope 116 is connected to the inner wall of the exhaust pipe 111 at one end away from the dustproof plate 112. A sealing block 117 is arranged on the side of the movable block 114 away from the driving rod 113. One end of the sealing block 117 extends into the air outlet. A limiting ring 118 is arranged on the outer wall of the sealing block 117. A sealing groove is arranged on the side of the limiting ring 118 close to the air outlet, and a sealing ring 119 is arranged in the sealing groove.

[0096] The working principle and beneficial effects of the above technical solution are as follows: when hydrogen is not discharged from the gas outlet, the dustproof plate 112 can block the outlet side of the exhaust pipe 111 to prevent dust from entering the gas outlet and causing the gas outlet to be blocked. At the same time, the outer wall of the sealing block 117 is adapted to the inner wall of the gas outlet to block the gas outlet. At the same time, the limiting ring 118 can limit the sealing block 117 to prevent the sealing block 117 from entering the interior of the second hydrogen tank 5. When the sealing ring 119 contacts the outer wall of the second hydrogen tank 5, the gas outlet is blocked. When the pressure in the second hydrogen tank 5 increases, hydrogen is discharged from the gas outlet, and the hydrogen can push the sealing block 117 to slide to the outside of the gas outlet, and the sealing block 117 drives the moving block 114 to move, and the moving block 114 moves stably in the exhaust pipe 111 through the roller 115, which improves the moving block. After the gas outlet is blocked by the second blocking block 96, the dustproof plate 112 returns to its original position under the elastic action of the elastic rope 116, which has a dust-proof effect on the gas outlet and prolongs the service life of the device.

[0097] Working principle: When using the device for online concentration detection of hydrogen supply of a hydrogen fuel cell of the present invention, according to Figure 1-Figure 7 , including the following steps:

[0098] Step 1: Set a hydrogen detection cycle and detect the hydrogen concentration and temperature in the first hydrogen tank 2 according to the hydrogen detection cycle;

[0099] Step 2: Process the hydrogen concentration data collected by the data acquisition module and record the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value;

[0100] Step 3: Analyze the processed hydrogen concentration data, and when the hydrogen concentration value in the first hydrogen tank 2 exceeds the set concentration threshold, issue an alarm signal;

[0101] Step 4: At the same time, the starter cylinder 31 drives the push rod 32 to move upward, causing the movable plate 34 to move upward and contact the fixed plate 8. Since the first air inlet hole 35 and the second air inlet hole 81 are staggered, the air inlet pipe 6 is now in a sealed state, and the first hydrogen tank 2 no longer supplies hydrogen to the hydrogen fuel cell body 1;

[0102] Step 5: When the push rod 32 moves upward, it drives the support plate 361 to move upward, so that the first blocking block 363 leaves the outlet pipe 4. At this time, the outlet pipe 4 is opened, and the hydrogen in the first hydrogen tank 2 is transferred to the second hydrogen tank 5;

[0103] Step 6: When hydrogen continues to flow into the second hydrogen tank 5 through the outlet pipe 4, causing the pressure in the second hydrogen tank 5 to rise, the piston 94 is pushed upward. At this time, the second support rod 95 moves upward with the piston 94, driving the second blocking block 96 to move upward, opening the outlet and discharging excess hydrogen;

[0104] Step 7: When the alarm is lifted, start the cylinder 31 and lower the movable plate 34. At this time, the first blocking block 363 is lowered halfway, and the hydrogen in the second hydrogen tank 5 enters the first hydrogen tank 2 through the outlet pipe 4, so that the first air inlet 35 and the second air inlet 81 supply hydrogen to the hydrogen fuel cell body 1. At the same time, the hydrogen in the second hydrogen tank 5 decreases, the pressure decreases, and the spring 92 in the fixed sleeve 91 loses its compression, causing the second blocking block 96 to descend and block the outlet.

[0105] In summary, the device for online concentration detection of hydrogen supply of a hydrogen fuel cell of the present invention can immediately stop supplying hydrogen to the hydrogen fuel cell main body 1 when an abnormality in the hydrogen concentration value is detected, so as to avoid untimely processing, resulting in continuous supply of hydrogen to the hydrogen fuel cell main body 1, causing damage to the battery, and thus affecting the service life of the battery. By removing excess hydrogen, the pressure in the second hydrogen tank 5 can be prevented from increasing, exceeding the limit that the second hydrogen tank 5 can withstand, causing the second hydrogen tank 5 to explode. The detected hydrogen concentration value is used for prediction, and the concentration of hydrogen in the hydrogen fuel cell main body 1 can be monitored in real time. Once an abnormality occurs, an alarm signal can be immediately issued to effectively prevent hydrogen leakage or explosion. By predicting the hydrogen concentration value, the concentration can also be accurately adjusted according to the change in hydrogen concentration to ensure that the hydrogen fuel cell main body 1 always operates in the best state, and to avoid concentration fluctuations causing performance degradation or failure of the hydrogen fuel cell main body 1. By performing temperature compensation processing on the collected hydrogen concentration data, the measurement error caused by environmental factors can be corrected, thereby improving the accuracy of the measurement.

[0106] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0107] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A device for online concentration detection of hydrogen gas supply of a hydrogen fuel cell, comprising a hydrogen fuel cell body (1), characterized in that: An air inlet pipe (6) is fixedly provided on one side of the hydrogen fuel cell body (1), a fixing plate (8) is fixed inside the air inlet pipe (6), a second air inlet hole (81) is provided on the fixing plate (8), the air inlet pipe (6) is fixed to the bottom of the first hydrogen tank (2), a driving assembly (3) is installed inside the first hydrogen tank (2), a hydrogen concentration detection assembly (7) is installed on the inner wall of the first hydrogen tank (2), an audible and visual alarm (10) is provided on the top of the first hydrogen tank (2), an air outlet pipe (4) is provided on one side of the first hydrogen tank (2), the air outlet pipe (4) is communicated with the second hydrogen tank (5), and a second air blocking assembly (9) is provided inside the second hydrogen tank (5); The driving assembly (3) includes a cylinder (31), a movable plate (34) and a first air inlet (35). The movable plate (34) is provided with the first air inlet (35), and the first air inlet (35) and the second air inlet (81) are arranged in an alternating manner. The hydrogen concentration detection component (7) comprises: The sensor is used to detect the hydrogen concentration in the first hydrogen tank (2) in real time, and to collect the temperature data value in the first hydrogen tank (2) in real time, and to dynamically adjust the frequency of collecting the hydrogen concentration according to the temperature data value and the corresponding hydrogen concentration value obtained in real time; The data processing module is used to process the hydrogen concentration data collected by the data acquisition module and record the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value; A data analysis module is used to analyze the processed hydrogen concentration data and to issue an alarm signal when the hydrogen concentration value in the first hydrogen tank (2) exceeds a set concentration threshold; The process of collecting data by the sensor includes: extracting temperature data values in the first hydrogen tank (2) in real time; Real-time collection of the hydrogen concentration value in the first hydrogen tank (2) corresponding to each temperature data value collection moment; The temperature data value and the hydrogen concentration value in the first hydrogen tank (2) corresponding to each temperature data value acquisition moment are used to obtain the hydrogen concentration acquisition frequency adjustment coefficient. The hydrogen concentration acquisition frequency adjustment coefficient is obtained by the following formula: ； Where K represents the hydrogen concentration acquisition frequency adjustment coefficient; ΔT represents the temperature deviation between the current temperature value and the preset temperature reference value; ΔC represents the hydrogen concentration deviation between the current hydrogen concentration value and the preset hydrogen concentration reference value; ΔT max Indicates the expected maximum temperature deviation; ΔC max Indicates the expected maximum hydrogen concentration deviation; ΔT y Indicates the preset temperature deviation threshold; ΔC y represents the preset hydrogen concentration deviation threshold; α represents the temperature acquisition sensitivity of the temperature sensor; β represents the hydrogen concentration acquisition sensitivity; r represents the first adjustment coefficient, which is used to control the change rate of the temperature acquisition sensitivity; δ represents the second adjustment coefficient, which is used to control the change rate of the hydrogen concentration acquisition sensitivity; The current hydrogen concentration collection frequency is adjusted using the hydrogen concentration collection frequency adjustment coefficient. The adjusted hydrogen concentration collection frequency is obtained by the following formula: ； Among them, F ad Indicates the adjusted hydrogen concentration collection frequency; F b Indicates the hydrogen concentration collection frequency before adjustment; K indicates the hydrogen concentration collection frequency adjustment coefficient; K y Indicates the preset hydrogen concentration acquisition frequency adjustment coefficient threshold; λ indicates the coefficient adjustment factor, which is used to control the speed at which the acquisition frequency changes with the hydrogen concentration acquisition frequency adjustment coefficient K; F max Indicates the maximum allowed frequency for hydrogen concentration collection.

2. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The driving assembly (3) further comprises a push rod (32), a connecting rod (33) and a first air blocking assembly (36); the output end of the cylinder (31) is connected to the push rod (32); the bottom of the push rod (32) is fixed to the first air blocking assembly (36); a connecting rod (33) is fixed to the bottom of the first air blocking assembly (36); the bottom of the connecting rod (33) passes through the fixed plate (8) and is connected to the movable plate (34); the connecting rod (33) is movably connected to the fixed plate (8).

3. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 2, characterized in that: The first gas blocking assembly (36) comprises a support plate (361), a first support rod (362) and a first blocking block (363); the support plate (361) is fixed to the bottom of the push rod (32); the first support rod (362) is fixed to a side of the support plate (361) close to the gas outlet pipe (4); the first blocking block (363) is fixed to the first support rod (362); and the first blocking block (363) is arranged in close proximity to the gas outlet pipe (4).

4. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The second gas blocking assembly (9) comprises a fixed sleeve (91), a spring (92), a telescopic rod (93), a piston (94), a second support rod (95) and a second block (96). The fixed sleeve (91) is arranged on the top of the second hydrogen tank (5). A spring (92) is arranged in the fixed sleeve (91). The spring (92) is fixed on the telescopic rod (93). One end of the telescopic rod (93) away from the fixed sleeve (91) is mounted on the piston (94). A second support rod (95) is arranged on one side of the piston (94). A second block (96) is fixed on the second support rod (95). An air outlet is provided on the side of the second hydrogen tank (5) close to the second block (96). The second block (96) is arranged close to the air outlet.

5. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The sensor comprises: A hydrogen concentration detector, used to set a hydrogen detection cycle and perform real-time detection of the hydrogen concentration in the first hydrogen tank (2) according to the hydrogen detection cycle; The temperature sensor is used to collect temperature data values in the first hydrogen tank (2) in real time.

6. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The data analysis module specifically includes: Set the hydrogen concentration difference threshold between two adjacent detection cycles, compare the detected hydrogen concentration values according to the detection cycle, and determine whether the hydrogen concentration value is in an increasing state; If it is determined that the hydrogen concentration value has increased, determine whether the difference between the hydrogen concentration values corresponding to the periods before and after the increase is greater than the set threshold; If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is greater than the set threshold, the predicted hydrogen concentration value is obtained after a first preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise; If it is determined that the difference between the hydrogen concentration values corresponding to the periods before and after the rise is not greater than the set threshold, the predicted hydrogen concentration value is obtained after a second preset period of time using the linear slope of the hydrogen concentration values corresponding to the periods before and after the rise, wherein the first preset period of time is greater than or equal to the second preset period of time; It is determined whether the predicted hydrogen concentration value is greater than a preset hydrogen concentration threshold value, and if it is determined that the predicted hydrogen concentration value is greater than the preset hydrogen concentration threshold value, an audible and visual alarm is issued through the audible and visual alarm (10).

7. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The data processing module includes: Preset compensation curve, which represents the correlation between temperature and concentration compensation parameters; Searching for a concentration compensation parameter that matches the temperature on a preset compensation curve, compensating the hydrogen concentration using the concentration compensation parameter, and obtaining the treated hydrogen concentration; The detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are recorded, and the detected hydrogen concentration value and the detection time corresponding to the hydrogen concentration value are stored according to the set detection cycle.

8. The device for online concentration detection of hydrogen gas supply for a hydrogen fuel cell according to claim 1, characterized in that: The dustproof assembly also includes an exhaust pipe (111), the exhaust pipe (111) is horizontally arranged outside the second hydrogen tank (5), one end of the exhaust pipe (111) is connected to the gas outlet, the exhaust pipe (111) is set as a square tube, the outlet cross-sectional area of the exhaust pipe (111) is larger than the gas outlet area, a dustproof plate (112) is set on the outlet side of the exhaust port, the dustproof plate (112) is hingedly connected to the inner wall of the exhaust pipe (111), a driving rod (113) is set on the side of the dustproof plate (112) close to the gas outlet, one end of the driving rod (113) is hingedly connected to the side wall of the dustproof plate (112), and the other end of the driving rod (113) is hingedly connected to the side wall of the moving block (114). The moving block (114) is arranged in the exhaust pipe (111), a plurality of rollers (115) are arranged on the outer wall of the moving block (114), the rollers (115) are in contact with the inner wall of the exhaust pipe (111), a plurality of elastic ropes (116) are arranged on the inner wall of the dustproof plate (112), and one end of the elastic rope (116) away from the dustproof plate (112) is connected to the inner wall of the exhaust pipe (111), a sealing block (117) is arranged on the side of the moving block (114) away from the driving rod (113), one end of the sealing block (117) extends into the air outlet, a limiting ring (118) is arranged on the outer wall of the sealing block (117), a sealing groove is arranged on the side of the limiting ring (118) close to the air outlet, and a sealing ring (119) is arranged in the sealing groove.

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