6046results about "Fuel cells" patented technology

The invention relates to a membrane stack (9) for an air humidifier (1) of a fuel cell for humidifying a dry supply air stream (2) of the fuel cell by means of a moist exhaust air stream (3) of the fuel cell, - wherein the membrane stack (9) is configured in a cuboid shape, has a stacking direction (S) and four stacking sides (10) perpendicular to the stacking direction (S), - wherein the membrane stack (9) has a vertical direction (Z) parallel to the stacking direction (S), a longitudinal direction (X) perpendicular to the vertical direction (Z) and a transverse direction (Y) perpendicular to the vertical direction (Z) and perpendicular to the longitudinal direction (X), - wherein the four stack sides (10) form an air supply inlet (ZE) and an air supply outlet (ZA) facing away from each other in the longitudinal direction (X), and an exhaust air inlet (AE) and an exhaust air outlet (AA) facing away from each other in the transverse direction (Y), - wherein the membrane stack (9) comprises several membranes (11) which are permeable to moisture and impermeable to air and which follow one another in the stacking direction (S) such that the membranes (11) within the membrane stack (9) each separate a supply air path (ZP) connecting the supply air inlet (ZE) to the supply air outlet (ZA) from an exhaust air path (AP) connecting the exhaust air inlet (AE) to the exhaust air outlet (AA). Improved functional reliability can be achieved by having the membrane stack (9) have several spacers (12) which are arranged in the stacking direction (S) between two immediately successive membranes (11) in one of the exhaust air paths (AP).

The invention provides a novel polynorbornene anion exchange ionomer containing a polar functional group as well as a preparation method and application of the novel polynorbornene anion exchange ionomer. The polynorbornene has excellent thermal stability and chemical stability. Meanwhile, the AEI main chain of the polynorbornene has no aryl group, so that the adsorption influence caused by the aryl group is avoided. The synthesized addition polynorbornene AEI in the form of quaternary ammonium salt can be dissolved in a low-boiling-point solvent, and it is ensured that a membrane electrode can be prepared through a solvent casting method. Besides the solubility of the AEI, the addition polynorbornene-based AEI in the form of quaternary ammonium salt is modified by utilizing a thiol-ene click reaction, an anion exchange ionomer containing a polar functional group can be prepared, the interaction between the AEI and an electrolytic catalyst is improved, the reaction is simple and easy to operate, the universality is high, and the method is suitable for industrial production. And the current density in the AEMWE system containing the AEI can be effectively improved.

The invention belongs to the technical field of solid oxide batteries, and discloses a nickel-iron support body of a metal-supported solid oxide battery, a total battery and a preparation method. The nickel-iron supporting body of the metal-supported solid oxide battery is made of a nickel-iron alloy material in a reducing atmosphere, a gradient pore structure with gradient pore distribution is prepared and formed through a double-layer casting phase inversion process, and the gradient pore structure is a composite structure comprising a finger-shaped pore channel layer and a skin layer. Compared with a ceramic material, the composite material has higher mechanical strength and thermal conductivity, can better bear thermal shock and mechanical stress, is particularly suitable for high-temperature and rapid thermal cycle working environments, and can keep good structural stability under the rapid heating condition of 50 DEG C / min.

The invention discloses a preparation method of an acid-resistant polyquaternary ammonium membrane based on a Porxitch interfacial polymerization reaction. The preparation method comprises the following steps: dissolving an amine monomer in a water-phase solvent to form a water-phase solution; dissolving a bromomethyl monomer in an organic phase solvent to form an organic phase solution; after the base membrane is soaked in the water phase solution for a period of time, the water phase solution is removed, and the water phase solution remaining on the surface of the base membrane is removed; coating the organic phase solution on the surface of a base membrane, and carrying out interfacial polymerization reaction for 1-15 minutes at the high temperature of 50-90 DEG C, so as to prepare a polyquaternary ammonium membrane on the base membrane; and washing the surface of the polyquaternary ammonium membrane with an organic solvent to remove residual reactants, and then carrying out heat treatment in a drying oven to obtain the acid-resistant polyquaternary ammonium membrane.

The invention relates to a cuboid membrane stack (9) for an air humidifier (1), which has a stacking direction (S) and four stacking sides (10) transverse to the stacking direction (S), wherein the membrane stack (9) has a vertical direction (Z) parallel to the stacking direction (S), a longitudinal direction (X) perpendicular to the vertical direction (Z), and a transverse direction (Y) perpendicular to both the vertical direction (Z) and the longitudinal direction (X), wherein the four stacking sides (10) form an air supply inlet (ZE) and an air supply outlet (ZA) facing away from each other in the longitudinal direction (X), and an exhaust air inlet (AE) and an exhaust air outlet (AA) facing away from each other in the transverse direction (Y), wherein the membrane stack (9) has several membranes (11) which, within the membrane stack (9), each form an air supply path (ZP) connecting the air supply inlet (ZE) to the air supply outlet (ZA), and an exhaust air path (AP). separate,which connects the exhaust air inlet (AE) with the exhaust air outlet (AA). Improved dimensional stability can be achieved by forming a membrane pair (18) with two membranes (11) that are adjacent in the stacking direction (S) and that define one of the supply air paths (ZP) in the stacking direction (S), by connecting the two membranes (11) of the respective membrane pair (18) airtightly to each other by an adhesive bond (21) in a first edge region (19) adjacent to the exhaust air inlet (AE) and in a second edge region (20) adjacent to the exhaust air outlet (AA), and by having the membrane stack (9) have several spacers (12) that are arranged in the stacking direction (S) between two immediately successive membrane pairs (18) and each of which rests against one of the membranes (11) of the two membrane pairs (18) and separates them from each other in the stacking direction (S), such thatthat the membranes (11) adjacent to and spaced apart from each other on the spacer (12) limit one of the exhaust air paths (AP) in the stacking direction (S).

The invention provides a state detection and health diagnosis method and system of an SOFC system, and relates to the technical field of solid oxide battery state monitoring, and the method comprises the steps: obtaining the operation parameters of an SOFC, and optimizing the data consistency and anti-noise capability based on the fusion algorithm of dynamic Bayesian reasoning and the conditional probability distribution of the operation state of the SOFC; frequency domain features are extracted through fast Fourier transform, dimension reduction is carried out in combination with improved principal component analysis, key variables are reserved, and feature expression is optimized for SOFC high-temperature vibration features; predicting SOH (state of health) and RUL (residual life) of the SOFC based on a random forest, a generative adversarial network and an online updating mechanism; and outputting a diagnosis result and generating a dynamic maintenance scheduling plan based on the RUL prediction, and optimizing the system life by minimizing the downtime and the cost. Through integration of multi-source data fusion, frequency domain feature extraction, AI diagnosis and data enhancement and predictive maintenance, limitations in precision, efficiency and service life optimization in the prior art are overcome.

The invention belongs to the technical field of conductive connection, and particularly relates to an assembling mechanism for keeping combined pole pieces clamped, in particular to a pole piece assembling mechanism, an electric pile material pre-assembling device and a working method of the electric pile material pre-assembling device. Wherein the pole piece assembling mechanism is provided with an assembling plate; a rotating arm; a first lifting assembly; a second lifting assembly; the pressing frame is provided with a square opening matched with the pressing plate. And elastic anti-clamping pieces are embedded in the side walls of the pressing plates. The elastic anti-clamping piece is arranged on the side wall of the pressing plate, so that when the pressing frame is separated from the pressing plate, the elastic anti-clamping piece can automatically and dynamically adjust the levelness of the pole piece frame falling into the pressing plate, and the problem that the pole piece frame is inclined and clamped is effectively avoided; when the pressing frame and the pressing plate are pressed in a matched mode, the elastic anti-clamping piece is pressed to retract, accurate assembly of the pole piece frame and the membrane electrode is guaranteed, pole piece damage caused by rigid contact is prevented through the elastic buffering effect, and therefore the assembly yield of the galvanic pile pole piece is remarkably increased.

The invention discloses a modeling and optimization control method for a gas supply system of a proton exchange membrane fuel cell, and belongs to the technical field of hydrogen energy power. The method comprises the following steps: establishing a nonlinear state space model of a proton exchange membrane fuel cell gas supply system; determining the optimal oxygen excess ratio of the system under different load currents through experiments, and fitting the optimal oxygen excess ratio into a reference function about the load currents; based on the nonlinear state space model, a model prediction control problem with tracking of the optimal oxygen excess ratio and minimization of the cathode and anode pressure difference as control targets is constructed and expressed as a constrained quadratic programming problem; and decomposing and iteratively solving the quadratic programming problem by adopting an alternating direction multiplier method to obtain the optimal control input of the current control period and act on the system. The method effectively solves the problem that traditional model predictive control is difficult to deploy in real time in a vehicle-mounted controller due to large calculated amount, so that efficient and accurate cooperative control of the proton exchange membrane fuel cell gas supply system is realized.

The invention discloses a water electrolysis hydrogen production electric pile performance evaluation method, and relates to the field of electric pile performance evaluation, and the method comprises the steps: S1, collecting operation parameters through a sensor system, carrying out preprocessing and time sequence alignment, and constructing a real-time data set; s2, according to the real-time data set and historical data, a stack health index is calculated through multi-layer feature hierarchical fusion and a machine learning model; s3, on the basis of the real-time data set, calculating a composite evaluation index parameter containing a safety margin factor and a performance degradation rate; s4, on the basis of the stack health index, analyzing in combination with the composite evaluation index parameters, and determining the stack performance state grade; and S5, extracting a maintenance suggestion in a preset level and maintenance strategy mapping relation based on the pile performance state level, and transmitting the maintenance suggestion to a visual interface for display through the cloud platform. Through multi-layer feature fusion and machine learning, the method achieves the precise evaluation of the health index of the galvanic pile, dynamically monitors the fault early warning, automatically generates an intelligent maintenance strategy, optimizes the performance, and prolongs the service life of equipment.

The invention relates to a membrane electrode with high oxygen permeability and a preparation method thereof, the membrane electrode comprises a proton exchange membrane, an anode catalyst layer and a cathode catalyst layer, the anode catalyst layer and the cathode catalyst layer are arranged on two sides of the proton exchange membrane, and anode catalyst slurry comprises an anode catalyst, an ionomer and a dispersing solvent in a mass ratio of 1: (1-10): (10-1000); the cathode catalyst slurry comprises a cathode catalyst, an ionomer, an ionic liquid and a dispersing solvent in a mass ratio of 1: (1-10): (1-10): (10-1000). Compared with the prior art, in order to solve the problem that oxygen mass transfer of a porous carbon carrier in a fuel cell catalyst layer is difficult, the method that ionic liquid and ionomer are mixed in advance, then slurry is prepared, and the slurry is sprayed to prepare the membrane electrode is adopted, so that a compact structure formed by an ionomer membrane on the surface of a catalyst is weakened, and the distribution uniformity of the ionomer membrane is improved; the local oxygen mass transfer resistance is obviously reduced, and the performance of the fuel cell under high current density is improved.

The invention provides a multi-target collaborative optimization scheduling method for a hydrogen-containing comprehensive energy system, and the method comprises the steps: building a hydrogen energy diversified utilization model containing electrolytic hydrogen production, hydrogen-to-methane production, hydrogen-to-electricity conversion, carbon capture, hydrogen storage and thermoelectric hydrogen doping, and fully absorbing surplus wind power new energy; on the basis, economy and low-carbon property are taken into consideration, a hydrogen-containing comprehensive energy system multi-target optimization scheduling model with minimum total operation cost and minimum carbon emission as targets is established, the model is solved in combination with an epsilon-constraint method and a TOPSIS decision-making method, and quantity-quality cooperative operation of the comprehensive energy system is promoted. Under the condition that the hydrogen doping ratio of fuel gas is fixed, the total cost and the carbon emission amount are reduced along with the increase of the hydrogen doping ratio of the CHP unit, and when the hydrogen doping ratio reaches up to 20%, the economic benefit and the environmental benefit of the IES are the best. Compared with a traditional IES optimization scheduling problem, multi-objective optimization can better promote quantity-quality cooperative operation of the IES, the overall performance of the comprehensive energy system is improved, and the method can be widely applied and popularized.

The invention relates to the technical field of battery raw materials, in particular to a preparation method of lithium sulfide powder, the lithium sulfide powder and application, and the preparation method comprises the following steps: uniformly mixing lithium sulfate and a carbon source according to a preset proportion to obtain a first mixture; performing first heat treatment on the first mixture in inert gas to obtain a second mixture; and performing second heat treatment on the second mixture in reducing gas to obtain the lithium sulfide powder. The product obtained by the preparation method disclosed by the invention is the lithium sulfide powder, and the obtained lithium sulfide powder has the advantages of less oxygen and carbon impurities, higher purity and high reaction activity, and meets the synthesis requirements of the electrolyte; according to the preparation method, in the process of preparing lithium sulfide, toxic gas and organic solvent are not used, the reaction temperature is low, the energy consumption is low, the requirement on production equipment is low, the process is simple, the cost is low, harmful gas emission is avoided, safety and environment friendliness are achieved, and industrialization is easy to achieve.

The invention provides a hydrogen supply control method of a fuel cell system, a controller, a system and a medium, and relates to the technical field of fuel cells. The method comprises the steps that in response to a starting instruction, the opening degree proportion of a first proportional valve is controlled to be adjusted to K11 from K10 through a first PID control parameter, K10 is the opening degree proportion of the first proportional valve which does not allow hydrogen to pass at all, and K11 is the initial opening degree proportion of the first proportional valve at the current environment temperature; obtaining a current actual pile entering pressure value and a hydrogen pile entering pressure set value of the electric pile; the second PID control parameter is used for controlling the opening proportion of the first proportional valve to be adjusted till the deviation between the actual reactor entering pressure value and the hydrogen reactor entering pressure set value is within the allowable error range, and the proportionality coefficient of the first PID control parameter is larger than that of the second PID control parameter. According to the method, the stability of hydrogen pressure is improved, so that the stability and the service life of the fuel cell system are improved.

The invention aims to provide a solid hydrogen storage fuel cell underwater vehicle hybrid power system coupled with a water management system, and belongs to the field of hybrid power. According to the invention, the hydrogen fuel cell is combined with a common cell, sufficient, stable and efficient power supply is provided for the underwater vehicle, the limitation of a traditional single energy system in the aspects of cruising ability, power output, energy density and the like is solved, and the comprehensive performance of the underwater vehicle is remarkably improved. A water supply and return integrated circulating water pump is adopted, and efficient and rapid circulation of water inside and outside the underwater vehicle is achieved by integrating water supply and drainage functions. The solid hydrogen storage material is adopted to release hydrogen, one part of hydrogen is conveyed to the fuel cell and participates in reaction to provide power output needed by the underwater vehicle, the other part of hydrogen is recycled and assists the hydrogen storage material in injection, and the underwater closed circulation mode of the underwater vehicle is achieved. And efficient operation and effective utilization of energy are ensured.

The invention provides an electric pile assembly line which comprises a preassembling branch line, a material preparation mechanism, a transfer mechanism and a final assembly branch line, the preassembling branch line is adjacent to the final assembly branch line, the material preparation mechanism is arranged at one end of the final assembly branch line, the transfer mechanism is located between the final assembly branch line and the material preparation mechanism, and the material preparation mechanism is used for storing diaphragms, bipolar plates and sealing gaskets. The preassembled branch lines are used for assembling the liquid flow frames, the partition plates and the blankets to form electrodes; the transfer mechanism is used for transferring the diaphragms, the bipolar plates, the sealing gaskets and the electrodes on the adjacent preassembled branch lines to the final assembly branch lines so as to stack the diaphragms, the bipolar plates and the sealing gaskets to form an electric pile. According to the invention, the distances between the transfer mechanism and the material preparation mechanism, the general assembly branch line and the adjacent pre-assembly branch line are equivalent, so that bipolar plates, sealing gaskets and diaphragms on the material preparation mechanism and electrodes on the pre-assembly branch line can be well transferred and stacked on the general assembly branch line to form an electric pile, the space layout is reasonable, the occupied production space is small, the cost is reduced, and the production efficiency is improved. The production efficiency is improved.

The invention provides a hydrogen storage catalyst, a preparation method thereof and application of the hydrogen storage catalyst in a hydrogen fuel cell, and belongs to the technical field of new energy. The preparation method of the hydrogen storage catalyst provided by the invention comprises the following steps: electroplating the surface of a nickel substrate to prepare a cobalt-phosphorus coating to obtain the hydrogen storage catalyst, the electroplating voltage ranges from 8.5 V to 9.5 V, the electroplating time ranges from 4.5 min to 5.5 min, and the electroplating temperature ranges from 25 DEG C to 35 DEG C. According to the method, the electroplating voltage, time and temperature are optimized, so that the quality of the cobalt-phosphorus coating can be improved, the cobalt-phosphorus coating is granular, and extending branches are formed at the protruding positions, so that the seawater corrosion resistance of the hydrogen storage catalyst is improved.

A flow field assembly for a fuel cell includes a flow field plate and a sealing member. A sealing member is disposed on the first side of the flow field plate and defines at least one bypass channel. The at least one bypass channel is configured to partially divert the reaction fluid from the inlet port of the flow field plate into a selected region of the reaction zone to cause the diverted portion of the reaction fluid to mix with the undiverted portion of the reaction fluid in the selected region such that the diverted portion of the reaction fluid is less than the undiverted portion of the reaction fluid in the selected region than in the absence of the at least one bypass channel. And the distribution uniformity of the reaction fluid on the reaction area is improved. The utility model also provides a fuel cell unit comprising the flow field assembly. According to the flow field assembly provided by the invention, the distribution uniformity of the current density can be improved by improving the distribution uniformity of the reaction fluid on the reaction region, so that reliable and efficient operation of the fuel cell unit is ensured.

An electrolytic cell (1) comprising a metal support (10) and a cell body part (20). The cell body part (20) has a gas diffusion layer (5) disposed on a first main surface (12) of the metal support (10). In a plan view of the first main surface (12) of the metal support (10), at least a portion of the outer edge (5a) of the gas diffusion layer (5) has a wave shape in which crest parts (51) and trough parts (52) alternate in succession.

The invention relates to a methanol internal combustion engine high-temperature fuel cell hybrid power system based on double-path waste heat gradient utilization. The invention relates to the technical field of internal combustion engine waste heat recovery and new energy power system integration. The system comprises a fuel tank, a first pump body, a heat exchanger, a methanol internal combustion engine, a turbine, a gas compressor, an air compressor, a reformer, a high-temperature proton exchange membrane fuel cell, an evaporator and a second pump body. A methanol-water vapor mixture generated by heat exchange of a mixed solution of methanol and water and a high-temperature fuel cell stack coolant in a heat exchanger is introduced into a reforming reactor and is subjected to catalytic reforming to produce hydrogen by utilizing waste heat of high-temperature tail gas of an engine, and the produced hydrogen is directly supplied to an anode of a high-temperature fuel cell. Through a double-path methanol distribution strategy, collaborative design of internal combustion engine waste heat recovery, electric pile heat management and reforming hydrogen production is realized, and the comprehensive energy efficiency of the system is improved.

The invention discloses a hydrothermal management system and method of a fuel cell and a fuel cell system. A cooling water circulation subsystem comprises a water inlet pipeline, a water outlet pipeline and a circulation module; the circulating module is used for controlling the cooling water to circularly flow in the fuel cell; the hydrothermal control subsystem comprises a control module, a power supply module, a temperature adjusting module and a signal acquisition module; the power module is used for providing electric signals for the temperature adjusting module. The temperature adjusting module is used for adjusting the temperature in the fuel cell according to the power supply signal; the signal acquisition module is used for acquiring the water inlet temperature, the water outlet temperature and the battery plate temperature of the fuel cell; the control module is used for acquiring the temperature of the water inlet, the temperature of the water outlet and the temperature of the battery pole plate in real time, controlling the working state of the circulation module and controlling a power supply signal provided by the power supply module to the temperature regulation module, and the scheme realizes accurate regulation and control of the temperature of the fuel cell, improves the output performance of the fuel cell and prolongs the service life of the fuel cell.

The invention relates to the technical field of airborne fuel cells, in particular to an airborne fuel cell system and a control method. The airborne fuel cell system comprises an electric pile power generation assembly, an air pressurization assembly, a hydrogen conveying assembly and an evaporative cooling assembly. And the air supercharging assembly is communicated with a cathode inlet of the electric pile power generation assembly. And the hydrogen conveying assembly is communicated with an anode inlet of the electric pile power generation assembly. The evaporative cooling assembly comprises a cooling pump, a humidifying unit, a first gas-water separator and a water storage tank, an electrode water drainage and exhaust port of the galvanic pile power generation assembly is communicated with an inlet of the first gas-water separator, and a water outlet of the first gas-water separator is communicated with the water storage tank. An inlet of the cooling pump communicates with the water storage tank, an outlet of the cooling pump communicates with the humidification unit, and the humidification unit communicates with an outlet of the air pressurization assembly. Therefore, the problems that the thermal management scheme of the airborne fuel cell is difficult to cover the whole flight envelope and the working temperature area of the fuel cell is narrow are solved.

An alternating current (AC) impedance spectroscopy method includes providing AC impedance spectroscopy ripple from power electronics into an electrochemical device and absorbing the ripple in the power electronics. In one embodiment, the AC impedance spectroscopy ripple is provided from the power electronics into the electrochemical device while an operating current or voltage is provided to or from the electrochemical device, whereby the AC impedance spectroscopy ripple does not interrupt operation of the electrochemical device.

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 utility model discloses a forklift fuel cell system and relates to the field of fuel cells. Comprising a fuel cell system module, a solid-state metal hydrogen storage module and a power cell module, and the fuel cell system module, the solid-state metal hydrogen storage module and the power cell module are all fixed in a forklift box body. According to the utility model, the whole system is divided into three modules, namely the fuel cell system module, the solid metal hydrogen storage module and the power cell module which are mutually independent, clear in boundary and free from mutual influence, so that the whole system can simultaneously take into account a solid metal hydrogen storage form and a gas hydrogen storage bottle form, and meanwhile, the power cell can also take into account various sizes and specifications; therefore, the whole system has a plurality of integration modes and a plurality of application scenes, and the extension and application range is wide.

The invention relates to the technical field of fuel cells of hydrogen energy unmanned aerial vehicles, in particular to a power balance method and system of a fuel cell system for a hydrogen energy unmanned aerial vehicle, and the method comprises the steps: calculating the power balance of the fuel cell system for the hydrogen energy unmanned aerial vehicle based on the real-time state of a lithium battery, the current flight working condition of the unmanned aerial vehicle and the efficiency characteristic of the fuel cell; dynamically setting a target charging current of the lithium battery; obtaining a deviation value based on the actual charging current of the lithium battery and the target charging current; the PID controller generates a control signal, adjusts the reaction rate of the fuel cell, and changes the output current of the fuel cell, so that the actual charging current of the lithium battery works with the target charging current as the reference; power balance between the fuel cell and the lithium battery can be effectively achieved, the stability, reliability and system efficiency of the unmanned aerial vehicle power system are improved, meanwhile, the fault handling capacity is achieved, and normal flight of the unmanned aerial vehicle under various conditions is guaranteed.

The invention relates to the technical field of new energy materials, and discloses a gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode. The gradient porous three-dimensional interpenetrating network direct ammonia fuel cell membrane electrode comprises an exchange membrane, an anode catalyst layer, a cathode catalyst layer and a gas diffusion layer, wherein the anode catalyst layer and the cathode catalyst layer have gradient pore size distribution from the exchange membrane side to the gas diffusion layer side; wherein the interiors of the anode catalyst layer and the cathode catalyst layer are provided with three-dimensional interpenetrating network structures. According to the invention, the utilization rate of the catalyst is improved by 30-50%, the mass transfer resistance is reduced by 40-60%, the interface contact is improved, the controllability of the preparation process is improved, the structural stability is enhanced, the power density of the direct ammonia fuel cell reaches 250-300mW / cm < 2 >, the performance retention rate after 5000 cycles can reach 85% or more, and the method has remarkable technical advantages and application prospects.

The invention discloses a hydrogen and oxygen supply method for a hydrogen fuel cell emergency power supply vehicle. The method comprises the following steps: 1, providing a hydrogen and oxygen supply system for the hydrogen fuel cell emergency power supply vehicle; 2, information acquisition; 3, data processing; the FL-LADRC algorithm disclosed by the invention has the characteristics of simple structure, low calculation burden and low implementation cost on the premise of ensuring the disturbance suppression capability, and is particularly suitable for being used by an embedded platform or resource-constrained equipment. According to the method, the problem that the cathode pressure cannot be measured is solved by introducing the sliding mode differential observer, and the dynamic coupling relation between the oxygen flow and the cathode pressure is compensated in real time in combination with the improved expansion state observer, so that the operation risks such as oxygen starvation and flooding are effectively eliminated; in addition, compared with a traditional PID control algorithm, the fuel cell air supply system adopts the IGA-BP prediction and the NNMPC control algorithm, the performance is remarkably improved, and the urgency and stability requirements of the emergency power supply vehicle in the power protection operation can be better met.

To disclose a fuel cell hybrid electric vehicle thermal management control method, relating to a technical field of fuel cell hybrid electric vehicle thermal management.SOLUTION: A thermal management control method for a fuel cell hybrid electric vehicle optimizes a flow of coolant liquid using an MPC in a multi-input multi-output complex nonlinear system of the fuel cell hybrid electric vehicle to ensure that respective parts are in a normal working temperature range. Then, the method takes inlet and outlet temperatures of the respective parts as state variables and a flow of coolant liquid of a pump of each component as control quantity to cooperatively control the temperatures of the respective parts using an MPC controller and considers relevance of heat management systems of respective circuits to improve the overall performance of the fuel cell hybrid electric vehicle.SELECTED DRAWING: Figure 1

Cerium oxide (CeO2) coated silica (SiO2) particles, optionally comprising the inorganic group-SO2X, and methods of making such particles. The addition of the cerium oxide (CeO2) coated silica (SiO2) particles to fluorinated polymers containing sulfonic acid functional groups increases their stability to free radical degradation when used in fuel cell applications or electrolytic applications.