570 results about "Hydrogen flow" patented technology

A green ammonia production hydrogen load prediction method based on sparse attention variational Bayes comprises the following steps: acquiring historical data of a green ammonia electrolysis hydrogen production industry through an acquisition sensor, and dividing the historical data into a training set, a verification set and a test set; performing standardization processing on the training set, and constructing an SVAE soft measurement training model; determining a final objective function suitable for SVAE; and performing real-time online prediction on the output target variable by using the current input characteristic variable by adopting the trained SVAE. The SVAE combines CNNs, PSSAM and a cross attention mechanism, and captures a long-term dependency relationship and a complex mutual relationship in industrial data. An optimized objective function is formulated in combination with variational reasoning and a Monte Carlo method and is used for offline training. The SVAE has remarkable advantages in the process of accurately predicting the hydrogen flow and optimizing the production process of the green ammonia, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses a hydrogen storage and transportation system under a wind-solar hydrogen production project and a control method. The hydrogen storage and transportation system at least comprises a hydrogen flowing pipeline and a water flowing pipeline, the hydrogen flowing pipeline at least comprises a first compressor, a low-pressure hydrogen storage container, a third compressor and a second heat exchanger which are connected in sequence; the first compressor is further sequentially connected with a second compressor, a high-pressure hydrogen storage tank, an eighth valve connected with the pressure reducing valve in parallel and a third compressor; the second compressor, the high-pressure hydrogen storage tank and the low-pressure hydrogen storage container are connected in parallel; the high-pressure hydrogen storage tank is connected with the pressure reducing valve through a ninth valve connected with the third compressor in parallel; the first compressor pressure is smaller than the third compressor pressure and smaller than the second compressor pressure; the water flow pipeline at least comprises a first heat exchanger, a first water pump and a second water pump which are sequentially arranged in the water flow direction. The second water pump is in fluid communication with the second heat exchanger; the first heat exchanger is arranged on the cooling water pipeline corresponding to the compressor. The multi-aspect requirements of stable output, efficient storage, energy conservation, environmental protection and the like can be met.

The invention relates to the technical field of fuel cells, in particular to a method and system for accurately controlling the hydrogen stoichiometric ratio of a fuel cell, and the method comprises the steps: firstly, obtaining a quantitative anode health state value through a fusion calculation model by collecting load current, anode inlet and outlet pressure, temperature, high-frequency resistance and other multi-source signals in real time; a feed-forward model based on a load current change rate predicts sudden change of hydrogen demand, and an optimal hydrogen flow instruction is jointly generated in combination with output of a PID controller which adaptively adjusts parameters according to a health state value. According to the method, the integrated diagnosis parameter, namely the anode health state value, is created, so that the internal state of the fuel cell can be accurately perceived and prospectively judged. Through deep fusion of multi-source heterogeneous information such as high-frequency resistance, anode pressure difference, current and temperature, a comprehensive index capable of comprehensively and quantitatively reflecting anode water content, gas concentration and runner smoothness is generated.

The invention belongs to the technical field of functional sugar alcohol hydrogenation, and particularly relates to a system and a method for intelligently controlling a reaction kettle in a functional sugar alcohol hydrogenation process. Comprising a temperature sensor TT, a pressure sensor PT, a liquid level sensor LT, a hydrogen concentration sensor TZT and a spectrum sensor, and the sensor networks are arranged on a reaction kettle body, a feeding pipeline, a condenser and a hydrogen recovery device. The device is used for collecting temperature, pressure, liquid level and hydrogen concentration in the reaction kettle and spectral data of an outlet sugar alcohol product in real time. The control execution layer comprises a PLC (Programmable Logic Controller), a dynamic valve controller, temperature control equipment and a stirrer speed regulation module; and the dynamic valve controller is connected to the hydrogen supply pipeline and the feeding pump. The hydrogen flow, the temperature and the stirring speed are adjusted in real time through AI dynamic optimization, the sugar alcohol conversion rate is increased to 5%, and the conversion rate fluctuation range is reduced to + / -0.5%.

The invention relates to the technical field of unmanned aerial vehicle power systems, in particular to a low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device.According to the low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device, the residual hydrogen amount can be accurately quantified through combined collection and fusion calculation of hydrogen flow signals and air pressure signals; and the opening state of the proportional valve and the air inlet valve is adjusted in real time under data driving, so that the hydrogen input is matched with the actual power requirement, the voltage, the current and the temperature are synchronously monitored, and fluctuation feature extraction and life parameter calibration are performed on a power output sequence. The operation health degree and the life loss trend of the fuel cell can be dynamically obtained before power distribution, an accurate reference basis is provided for follow-up power allocation, the internal resistance change trend is measured and calculated through voltage and current sampling, and dynamic adjustment of the charge-discharge depth and charge-discharge process parameters is carried out in combination with the health degree. And the usability and the load capacity of the lithium battery are accurately represented.

The fuel cell system comprises a gas source, a heat exchange device and a galvanic pile, a hydrogen source is connected with the heat exchange device, hydrogen output by the hydrogen source flows through the heat exchange device, the heated hydrogen is input into the galvanic pile, air output by an air source is input into the galvanic pile, and the galvanic pile is connected with the heat exchange device. The hydrogen and the air are subjected to electrochemical reaction in the electric pile; the electric pile is connected with the heat exchange device, and tail gas of the electric pile flows through the heat exchange device. Before hydrogen and air are input into the galvanic pile according to the set volume ratio, the hydrogen flows through the heat exchange device to be preheated and then is input into the galvanic pile, the hydrogen and the air are subjected to an electrochemical reaction in the galvanic pile to generate tail exhaust fluid, and the tail exhaust fluid flows through the heat exchange device to be subjected to heat exchange and then is discharged. In the whole process, hydrogen and air are subjected to electrochemical reaction in the galvanic pile to generate tail exhaust fluid, and the tail exhaust fluid is used for preheating the hydrogen, so that the utilization of heat carried by the tail exhaust fluid is realized.

The invention relates to the technical field of hydrogen energy storage and control, and discloses a hydrogen storage tank pressure and temperature control method and device based on model predictive control, and the method comprises the steps: determining a hydrogen state equation of a hydrogen storage tank, and constructing a hydrogen mass conservation equation and a hydrogen energy conservation equation; based on the hydrogen mass conservation equation and the hydrogen energy conservation equation, a state prediction model of the hydrogen storage tank state related to the net hydrogen flow change is established, and the hydrogen storage tank state comprises hydrogen pressure and hydrogen temperature; a target function is constructed with the hydrogen storage tank state and the net hydrogen flow as control targets, and constraint conditions are configured; on the basis of the input net hydrogen flow sequence of the state prediction model and the predicted hydrogen storage tank state sequence output by prediction, the target function is subjected to minimum solving, and the optimal net hydrogen flow sequence is obtained through iteration; and adjusting an inlet / outlet valve of the hydrogen storage tank based on the optimal net hydrogen flow sequence. The operation efficiency of the hydrogen storage system can be improved.

The invention belongs to the technical field of diamond preparation, and discloses a high-speed preparation method of a thick diamond film, which comprises the following steps of: uniformly spreading diamond particles on a substrate by using absolute ethyl alcohol, placing the substrate on a sample table in an MPCVD (Micro-Pressure Chemical Vapor Deposition) system, and introducing hydrogen, slowly heating the interior of the MPCVD system to a preset cleaning temperature so as to perform plasma cleaning on the surface of the substrate, and growing the substrate on the basis of the growth hydrogen flow, the methane gas flow, the growth power, the growth temperature and the growth air pressure through a segmented growth method, promoting the growth of nano-scale diamonds in gaps of the diamond particles on the surface of the substrate to connect the diamond particles to obtain a compact and uniform rough thick diamond film, and polishing the rough thick diamond film to obtain a thick diamond film with a smooth surface; the thick diamond film is grown on the substrate on which a layer of diamond particles are paved by using hydrogen and methane gas through a segmented growth method, so that the high-speed preparation efficiency of the thick diamond film is improved.

The invention relates to the technical field of pressure reducing valves, and discloses a high-pressure hydrogen pressure reducing valve and a using method thereof.The high-pressure hydrogen pressure reducing valve comprises a valve pipe assembly, the valve pipe assembly comprises a hydrogen filtering assembly, the two ends of the hydrogen filtering assembly fixedly communicate with valve shells, and the top of the hydrogen filtering assembly fixedly communicates with a gas valve assembly; one end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve, the other end of the hydrogen filtering assembly is rotationally connected with a fan wheel, the side face of the fan wheel is rotationally sleeved with a magnetic cutting element, the bottom of the fan wheel is fixedly connected with a rotating wheel, and one end of the inner side of the bottom of the valve shell fixedly communicates with a magnetic cylinder. The problem that groove-shaped erosion marks appear on the sealing face of the valve seat due to the fact that metal impurity particles in a pipeline of the pressure reducing valve impact the valve element and the valve seat along with high-speed hydrogen flow is solved, the metal impurity particles attached to the magnetic cylinder can be recycled, and the problems that resources are wasted and the surface of an outlet of a valve body is frosted when high-pressure hydrogen expands through throttling are solved.

The invention discloses a hydrogen charging system and method for a magnesium-based solid hydrogen storage reaction kettle. A hydrogen storage tank is placed in each placement position in an inner cavity of the reaction kettle, and a heat exchange coil pipe is arranged outside each placement position; the hydrogen charging system comprises a hydrogen charging part, a temperature control part and a safety protection part; the hydrogen filling part comprises a hydrogen filling main pipeline; a hydrogen flow controller and a hydrogen heat exchanger are arranged on the hydrogen filling main pipeline; the temperature control part comprises an external heat-conducting oil circulating system, the external heat-conducting oil circulating system comprises a heat-conducting oil tank, a flow bypass pipeline is arranged between the oil inlet pipeline and the oil return pipeline, and a heat-conducting oil shunting automatic switch valve is arranged on the flow bypass pipeline; the safety protection part comprises a safety valve arranged on the reaction kettle, the safety valve is externally connected with an emptying pipeline, a pressure relief bypass pipeline is arranged between the emptying pipeline and the hydrogen filling main pipeline, and an automatic opening and closing pressure relief valve is arranged on the pressure relief bypass pipeline. The system has the advantages that the hydrogen storage tanks in the reaction kettle can be quickly and efficiently filled with hydrogen, and the safety of the system is ensured.

The invention relates to the technical field of hydrogen energy conveying and material performance testing, in particular to a testing structure for hydrogen permeation testing in a high-pressure gas-phase hydrogen environment and an installation method and application of the testing structure. The testing structure comprises a sample body and an insulation sealing assembly, and the sample body is of a double-step disc structure; the uppermost edge of the first sealing insulation assembly is flush with the upper end face of the cylindrical platform, the sample body is installed on the inner side of the first sealing insulation assembly in a matched mode, the second sealing insulation assembly is in a shape with an upward opening, and the first sealing insulation assembly is installed in the second sealing insulation assembly in a matched mode. The test surface of the sample body of the test structure and the gas main flow keep a consistent flow velocity field, and when the test structure is used for testing, the permeation behavior of the hydrogen flow on the material surface can be truly reflected; all the clamping and conducting structures are arranged outside the pipe wall of the test pipeline or at the left part of the sample body, so that flow field disturbance is prevented from being introduced into a main airflow path.

The invention discloses an aviation kerosene quality online detection and optimization system based on a green hydrogen substitution technology, and relates to the technical field of quality detection, and the aviation kerosene quality online detection and optimization system comprises a quality monitoring module, an optimization control module and a carbon footprint tracking and verification module. The quality monitoring module monitors the purity of sulfide, aromatic hydrocarbon and hydrogen in real time through a multispectral and electrochemical sensor, determines the optimal mounting position of the sensor by combining hydrodynamic analysis, triggers early warning when the sensor exceeds the standard, and pushes the sensor to the optimization module. The optimization control module dynamically adjusts temperature, pressure and green hydrogen flow based on a deep reinforcement learning algorithm, constructs a multi-objective optimization model, maximizes sulfur removal efficiency, reduces energy consumption and carbon emission, and realizes closed-loop intelligent regulation and control; according to the method, the accuracy and real-time performance of aviation kerosene quality detection and regulation are improved, effective tracking and verification of the green hydrogen full-life-cycle carbon footprint are realized, and the green sustainable development of aviation kerosene production is promoted.

The present invention discloses a liquid hydrogen pressurization and refueling system synergistically driven by power and heat, at its core is a cascaded cryogenic and high-pressure vessel group, which achieves staged pressurization of liquid hydrogen to 80-100 MPa by combining reciprocating liquid hydrogen pump pressurization and equal-capacity thermal compression using cryogenic and high-pressure vessels, the filling of a vehicle-mounted storage tank occurs through these cascaded vessels; the pressurization and filling processes are closely integrated, with hydrogen flow in the filling process serving as a heat-transfer medium. Efficient in-tank thermal compression of the cryogenic and high-pressure vessels is achieved without additional driving force. Based on the combination of efficient low-pressure compression using the liquid hydrogen pump and high-pressure thermal compression without power consumption, the present invention fully utilized liquid hydrogen cooling capacity to replace the high pump power consumption typically required in the traditional pressurization process; and a cascaded storage tank is combined to reduce the exergy loss in the filling process, resulting in low-energy-consumption continuous filling of the liquid hydrogen refueling station.

The invention relates to the technical field of fuel cells, in particular to a hydrogen feeding amount control method of a hydrogen cell water-gas separation device for an unmanned aerial vehicle, a cyclone separation cavity, a heat exchange condensation cavity and a hydrogen mixing cavity which are sequentially distributed from bottom to top are arranged in a separation shell, and a structure combining multi-stage separation and heat exchange is adopted; the technical problem that a traditional gas-liquid separator cannot thoroughly remove micron-sized liquid drops and gaseous water vapor is solved, liquid water drops are efficiently removed through the cyclone separation cavity, new hydrogen and wet hydrogen are subjected to heat exchange through the heat exchange condensation cavity, residual water vapor is sufficiently condensed and separated out, and finally mixed hydrogen with the dryness meeting the requirement is output. When water in the water-gas separation device for the hydrogen battery is excessive, the opening degree of the first valve of the wet hydrogen inlet is reduced, and the opening degree of the second valve of the new hydrogen inlet is increased at the same time, so that the amount of water entering wet hydrogen in the gas-liquid separator is reduced, and formation of condensed accumulated water in the gas-liquid separator is inhibited.

The invention relates to a design scheme suitable for an electric heating device matched with a hydrogen-based shaft furnace for reducing iron ore, belongs to the technical field of hydrogen metallurgy for directly reducing a hydrogen-based shaft furnace, and aims to solve the problem that the service life of a heating furnace is influenced by aging of a heating rod due to high-temperature reaction between hydrogen and the heating rod. The hydrogen electric heating furnace adopts a separated structure design, hydrogen flows in a nickel-based alloy heating pipeline, and a silicon carbide rod is arranged in a heating furnace cavity, so that the surface of the heating rod is prevented from reacting with high-temperature hydrogen and water vapor; the heating furnace tube adopts a snake-shaped structure, so that the heat exchange area is increased, the deformation of the high-temperature furnace tube is compensated, and the stability of the whole heating furnace is improved; the heating furnace adopts multi-zone temperature control, and heating elements are uniformly distributed in the furnace, so that the temperature in the heating furnace is uniform, and the precision temperature control of + / -5 DEG C of the hydrogen outlet temperature is realized; the heating furnace cavity is protected by nitrogen, inlet hydrogen supply is cut off in time when hydrogen leaks, a safety linkage nitrogen valve is used for purging, and the overall safety of the heating furnace is improved. Through the design mode of the heating furnace, the durability and the safety of the pure hydrogen electric heating equipment are improved.

The invention relates to the technical field of image recognition, in particular to a hydrogen filling recognition method and system of a hydrogen filling station based on an image recognition technology, and the method comprises the steps: multi-source image synchronous collection: synchronously collecting a visible light image and an infrared thermogram of a hydrogen filling gun connection region; segmentation of a fogging interference area: segmenting the fogging interference area in the visible light image based on the temperature distribution of the infrared thermogram to generate an effective imaging area; hydrogen flow feature extraction and matching region generation: hydrogen flow features are extracted, the hydrogen flow features comprise reflection intensity gradient distribution in the visible light image and a low-temperature diffusion region of the infrared thermogram, and a candidate matching region set is constructed; and spatial coincidence degree judgment and leakage trend identification: monitoring the change of the spatial coincidence degree of the reflection intensity gradient and the low-temperature diffusion region, and generating a hydrogen leakage alarm when the coincidence degree exceeds a preset coincidence degree threshold value and is in a continuous expansion trend. The method introduces a spatial coincidence degree evolution discrimination mechanism, and has the characteristics of high resolution, high sensitivity and quick response.

The invention discloses a flexible load ammonia synthesis system and a flexible load ammonia synthesis process, and solves a plurality of problems confronted by adopting a large operation flexibility strategy to realize flexible load operation in the existing ammonia synthesis system. The system comprises a synthesis gas compressor connected with an ammonia synthesis unit, and further comprises a spherical tank hydrogen storage unit and an organic hydrogen storage unit which are connected with a gas inlet pipeline of the synthesis gas compressor, and the spherical tank hydrogen storage unit comprises a hydrogen spherical tank and a spherical tank hydrogen booster which are sequentially connected; the organic hydrogen storage unit comprises a hydrogenation subunit, a liquid storage unit and a dehydrogenation subunit which are connected in sequence; in the method, the raw material hydrogen is prepared from electrolyzed water, and the load of the absorption unit is adjusted in real time according to the flow Q of the raw material hydrogen. The system provided by the invention is simple, can maintain high-load and high-energy-efficiency flexible operation of the ammonia synthesis tower, is safe and reliable in process, and has the advantages of low energy consumption and quick response.

The invention provides a movable zero-carbon emergency energy device and management method for hydrogen-oriented wind-light-storage cooperation, and the device comprises a reaction system which is used for preparing a hydrogen flow in real time; the auxiliary gas system is used for outputting auxiliary gas flow; the fuel cell system is used for generating electricity through the reaction of the hydrogen flow and the auxiliary gas flow; the power storage system is used for storing electric energy generated by power generation of the fuel cell system; the discharging system is used for outputting the electric energy stored in the electricity storage system at a corresponding output voltage according to a preset requirement; the control system is used for coordinating and controlling the reaction system, the auxiliary gas system, the fuel cell system, the power storage system and the discharge system; and the explosion-proof box is used for loading the system. According to the movable zero-carbon emergency energy device for hydrogen-oriented wind-light-storage cooperation, power can be supplied to the outside by preparing hydrogen in real time and adopting a fuel cell power generation mode, the position of the device can be flexibly adjusted according to the power supply requirement, and the high-reliability, green and low-carbon emergency energy supply requirement is met.

A method for predicting a multi-physics field coupling process of natural hydrogen flow-heat transfer-rock thermal strain in underground pores belongs to the field of natural hydrogen resource exploration, and is characterized in that a multi-physics field coupling model for describing natural hydrogen flow-heat transfer-rock thermal strain in formation pores is established based on phase field variables; the method comprises the following steps: establishing a porous medium geometric model according to a rock underground pore structure, performing grid division on the porous medium geometric model to obtain a plurality of grid units for reflecting different spatial distribution positions of natural hydrogen in the rock underground pore structure, and setting initial conditions and boundary conditions of the porous medium geometric model; according to the multi-physics field coupling model, solving the space-time evolution characteristics of the hydrogen volume fraction, the water volume fraction, the fluid temperature, the rock skeleton matrix temperature and the rock skeleton matrix thermal strain value of each grid unit of the porous medium geometric model to obtain the distribution in time and space; according to the method, the reservoir forming mechanism and the reservoir forming stability of the natural hydrogen are evaluated more accurately and systematically.

The invention discloses a two-stage rotational flow hydrogen fuel nozzle and a combustion chamber thereof. The nozzle comprises a main hydrogen flow path, an auxiliary hydrogen flow path and an air flow path; the hydrogen main flow path is provided with a plurality of main spray holes which are distributed in a circumferential array; the air flow path is provided with a two-stage cyclone; the hydrogen auxiliary flow path comprises a hollow annular flow divider, the flow divider is coaxially arranged around the periphery of the hydrogen main flow path, and a plurality of injection holes are formed in the inner wall and the outer wall of the flow divider and communicated with the first-stage rotational flow channel and the second-stage rotational flow channel respectively. In the using process, efficient mixing of fuel and air is achieved through the synergistic effect of graded injection of main and auxiliary hydrogen and two-stage rotational flow air. According to the combustion chamber provided with the nozzle, large-scale flames are decomposed into a plurality of small flames through micro-scale injection, two-stage rotational flow is combined for strengthening mixing, the backfire risk is effectively restrained, the combustion temperature is lowered, NOx emission is remarkably reduced, meanwhile, the combustion stability is improved, and a reliable solution is provided for hydrogen fuel combustion of an aero-engine.

The invention discloses a growth method for reducing a Pit defect on a silicon carbide epitaxial surface, which comprises the following steps of: after epitaxial growth is completed, increasing the air flotation flow of a base, increasing the temperature in a reaction chamber, reducing the pressure in the reaction chamber and increasing the hydrogen flow, and entering an etching stage; hydrogen chloride gas is introduced discontinuously in the etching stage, and at least one introduction time period and an interruption time period after the introduction time period are included; the thermal instability of SiC at high temperature / low pressure is utilized, efficient decomposition is achieved through an H2 / HCl synergistic etching system, sub-damage and dislocation are reduced while the etching rate is increased, the thickness of the removed epitaxial layer can be accurately controlled, the Pit defect of the surface layer of the epitaxial layer is reduced, the crystallization quality of the epitaxial layer is kept, and the subsequent power device preparation requirement is met.

The invention provides a control method and device of an alkaline electrolyzed water system, an MPC controller optimizes hydrogen flow and auxiliary power supply power in real time through a prediction model in each control period to obtain an optimal control sequence of the current control period, and based on a first control parameter in the optimal control sequence, a second control parameter in the current control period is obtained; and cooperatively regulating the hydrogen-oxygen side pressure difference of the alkaline electrolyzed water system to a target value, and meanwhile, controlling the hydrogen concentration in oxygen of the alkaline electrolyzed water system within a safety threshold value. According to the scheme, the input is controlled based on rolling optimization of the multivariable dynamic prediction model, the dual targets of pressure difference stabilization and inhibition of the hydrogen content in oxygen are achieved, the technical problem that dynamic balance and the HTO risk are difficult to consider in traditional single parameter adjustment is solved, and the hydrogen production efficiency and safety are remarkably improved in the scene of wind and light fluctuation.

The present invention discloses a hydrogen energy utilization gas blending system and a hydrogen and natural gas ratio control method, which relates to the field of renewable energy utilization. The source hydrogen enters the gas mixing pipeline through an inlet ball valve, a pneumatic shut-off valve, and a filter, and the hydrogen flow is measured by a flow meter. The hydrogen dosage is adjusted by a regulating valve and then enters the gas mixing device through an outlet ball valve; the source natural gas enters the gas mixing pipeline through an inlet ball valve, a filter shut-off valve, and after pressure regulation and metering, it passes through a regulating valve to the outlet ball valve and enters the gas mixing device; the detection equipment at the gas mixing outlet controls the opening of the regulating valve on the natural gas and hydrogen pipelines together with the flow value after temperature and pressure compensation, controls the hydrogen volume flow, performs online adjustment and automatic following of the hydrogenation amount, and realizes the ratio of natural gas and hydrogen. The present invention realizes a stable gas mixing ratio of the two gases and high mixing accuracy. The equipment is skid-mounted as a whole, and an external stainless steel box with insulation and silencer functions is installed. The equipment is compact and beautiful, and is easy to install and move.

A H2 defueling system for automating defueling of a hydrogen tank is disclosed. The H2 defueling system comprises: a hydrogen storage tank containing hydrogen; a plurality of electronic valves configured for regulating hydrogen discharge of hydrogen from the hydrogen tank; at least one pressure sensor and at least one temperature sensor; a hydraulic circuit interconnecting the hydrogen tank, the plurality of electronic valves, the at least one pressure sensor and the at least one temperature sensor; and a control unit configured to: receive input from the at least one pressure sensor and the at least one temperature sensor; automatically adjust the flow rate of gaseous hydrogen from the storage tanks based on the input from the sensors to maintain the gaseous hydrogen within pressure limits; modulate operations of the plurality of electronic valves to control hydrogen discharge to control the flow of hydrogen from the hydrogen tank.

The invention discloses a hydrogen fuel stack structure, which comprises a plurality of fuel cell monomers arranged in a laminated manner, each fuel cell monomer comprises a polar plate, the front surface of each polar plate is provided with an air flow channel groove, the back surface of each polar plate is provided with a hydrogen flow channel groove, and each polar plate is provided with a plurality of cooling holes. The cooling holes penetrate through the front surface and the back surface of the polar plate, and the plurality of cooling holes are distributed in the peripheral sides of the hydrogen flow channel groove and the air flow channel groove. The hydrogen flow channel grooves and the air flow channel grooves are formed in the front faces and the back faces of the polar plates, the polar plates are directly provided with the cooling holes for cooling, the single-plate three-channel structural design is achieved, the overall structure is simple, the weight of the hydrogen fuel stack structure can be obviously reduced, and the lightweight development of the battery is facilitated.

The application relates to the technical field of hydrogen energy transportation and material performance testing, and relates to a test structure for hydrogen permeation testing under a high-pressure gaseous hydrogen environment, a mounting method and application thereof. The test structure comprises a sample body and an insulating sealing assembly, and the sample body is in a double-stage disc structure. The uppermost edge of the first sealing insulating assembly is flush with the upper end surface of the cylindrical platform, and the sample body is matched with the inner side of the first sealing insulating assembly for installation. The second sealing insulating assembly is in an open-upward shape, and the first sealing insulating assembly is matched with the second sealing insulating assembly for installation. The test surface of the sample body of the test structure is kept consistent with the flow field of the gas main stream, and when the test structure is used for testing, the permeation behavior of the hydrogen flow to the material surface can be truly reflected. All clamping and conducting structures are arranged on the outer part of the pipe wall of the test pipeline or the left part of the sample body, so that flow field disturbance is avoided in the main path of the gas flow.

The utility model relates to the technical field of electrolyzed water, in particular to a bipolar plate and an electrolytic bath. The utility model relates to a bipolar plate, which comprises a substrate, at least two side-by-side water oxygen flow fields arranged on the anode surface of the substrate, at least one hydrogen flow field arranged on the cathode surface of the substrate, and a water inlet, a water oxygen outlet and a hydrogen outlet which penetrate through the substrate, and the water inlet is communicated with the water inlet end part of each water oxygen flow field; the water oxygen outlet is communicated with the water oxygen outlet end part of each water oxygen flow field; and the hydrogen outlet is communicated with the hydrogen outlet end part of the hydrogen flow field. The utility model provides a bipolar plate and an electrolytic bath, which are used for solving the problem of non-uniform water flow distribution on the anode side of the bipolar plate.

The invention relates to the technical field of fuel cells, in particular to an air-cooled hydrogen fuel cell energy recycling device and a control method thereof.The air-cooled hydrogen fuel cell energy recycling device comprises a hydrogen fuel cell stack, a hydrogen storage bottle and a fan, the fan is communicated with an air flow channel of the hydrogen fuel cell stack, and the hydrogen storage bottle is communicated with a hydrogen flow channel of the hydrogen fuel cell stack through a hydrogen supply pipeline; a heat recovery channel surrounding the hydrogen storage bottle is arranged on the outer side of the hydrogen storage bottle, one end of the heat recovery channel is communicated with the fan through an air inlet channel, the other end of the heat recovery channel is connected with a humidifier through an air outlet channel, the humidifier is arranged on the side, away from the fan, of the hydrogen fuel cell stack, and waste heat generated during operation of the hydrogen fuel cell stack is recovered. Heat is provided for the hydrogen storage bottle through the heat recovery channel, the energy utilization rate is improved, the hydrogen desorption speed of the hydrogen storage bottle is maintained, the stack efficiency is improved, condensate water in the hydrogen desorption and heat absorption process of the hydrogen storage bottle is used for humidifying an air inlet of a hydrogen fuel cell stack, water balance of the air-cooled hydrogen fuel cell is effectively guaranteed, and the phenomenon of membrane drying is prevented.

The invention discloses an early warning method and device for leakage of a hydrogen fuel cell in an environment bin, and relates to the technical field of hydrogen fuel cells, and the method comprises the steps: obtaining the actual hydrogen flow, the output power, the efficiency under the current output power, and the hydrogen utilization rate of a vehicle-mounted hydrogen fuel cell system; calculating a theoretical hydrogen demand flow according to the output power, the efficiency under the current output power and the hydrogen utilization rate; calculating the difference ratio between the theoretical hydrogen demand flow and the actual hydrogen flow; when the difference value proportion is higher than a preset difference value proportion threshold value, an alarm is given. According to the method, when the environmental hydrogen concentration does not reach the detection condition of a traditional detection method, hydrogen leakage is judged through the difference value proportion, the sensitivity of hydrogen leakage detection is greatly enhanced, and early warning is made at the early stage of hydrogen fuel cell leakage, so that greater safety risks are avoided.

The invention provides a fuel cell anode pressure fluctuation suppression method and system, and relates to the technical field of battery intelligent control, and the method comprises the steps: carrying out the real-time sensing of the stack operation condition of a target fuel cell, and obtaining the stack operation state parameters; performing critical working condition identification, pressure trend prediction and adaptive model prediction control based on the operation state parameters of the electric pile, and deciding an optimal control instruction for balancing pressure stability, action smoothness and system energy efficiency; the optimal control instruction is converted into the opening degree of a proportional valve at the front end of an ejector and the rotating speed of an anode circulating pump, and the flow of hydrogen entering an anode and the amount of recycled gas are finally adjusted by changing the opening degree and the rotating speed, so that the anode pressure fluctuation of the target fuel cell is inhibited; through multi-level information fusion and decision optimization, accurate and smooth control of the anode pressure is realized, and the dynamic performance and reliability of the fuel cell system are significantly improved.