1237 results about "Hydrogen fuel cell" patented technology

The invention discloses a hydrogen-lithium dual-power system structure optimization design and integrated control method applied to an unmanned aerial vehicle. The method comprises the following steps: constructing a hydrogen-lithium dual-power system of the unmanned aerial vehicle; setting an integrated control strategy according to the hydrogen-lithium dual-power system; the integrated control strategy comprises an energy management strategy and a life and safety management strategy; the energy management strategy comprises a rule-based strategy, a power following strategy and a self-adaptive optimization strategy; the service life and safety management strategy comprises a hydrogen fuel cell protection strategy, a lithium battery health management strategy, a thermal management strategy, a dual-power coupling safety management strategy and a redundancy and fault processing strategy. By optimizing the power system design and the energy management strategy, the mass of the unmanned aerial vehicle device is reduced, the cruising ability, the load capacity and the environmental adaptability of the unmanned aerial vehicle are improved, and optimization processing of the control strategy is achieved.

The invention discloses a multi-dimensional multi-physics field coupling analysis platform of a hydrogen fuel cell based on artificial intelligence, and relates to the technical field of hydrogen fuel cells, the platform comprises a user interaction interface module, a multi-physics field model construction module, a data acquisition and preprocessing module, an integration module and an analysis and result output module; an electrochemical reaction model, a temperature field model and a gas and liquid flow model are respectively built through a multi-physical field model building module, the coupling strength among different physical fields is quantified, and the electrochemical reaction model, the temperature field model and the gas and liquid flow model are integrated into a multi-physical field model; physical action parameters such as electrochemical reaction rate, temperature value and the like are associated with time change, spatial distribution and fault conditions, so that the platform can simulate the multi-physical field coupling effect of the hydrogen fuel cell under complex working conditions, and the performance of the fuel cell is analyzed; and a reliable basis is provided for the geometric structure, material selection and operation condition optimization of the fuel cell.

The invention relates to the technical field of automobile energy supply, in particular to a solid hydrogen storage-fuel cell integrated power assembly system based on dual-mode hydrogen supply, which comprises a hydrogen supply path identification module, a hydrogen storage unit state monitoring module, a linkage path switching module, a fuel cell load matching module and a safe hydrogen discharge regulation and control module. According to the method, the hydrogen supply pressure difference value is obtained by dynamically comparing the pressure of the cavity of the hydrogen storage tank with the pressure of the hydrogen inlet of the fuel cell, the current hydrogen supply path state can be accurately recognized in the early stage, rapid judgment of the hydrogen supply mode and accurate control of path switching are achieved, whether the risk of hydrogen supply interruption exists or not can be effectively screened, and the reliability of hydrogen supply is improved. The switching reliability of a hydrogen supply channel is improved through cross comparison of key state signals of a main channel and a standby channel, and instant response and energy consumption optimization of hydrogen discharge safety regulation and control are guaranteed through a linkage feedback mechanism between the hydrogen concentration change rate in unit time and catalytic converter control power.

The invention discloses a sleeve type annular cathode open type air cooling hydrogen fuel cell, and belongs to the technical field of hydrogen fuel cells. The air cooling module is vertically arranged on the rack, and the air cooling module comprises an inner cooling bin and an outer cooling bin coaxially arranged outside the inner cooling bin; an air cavity for conduction of an air source is defined between the inner cooling bin and the outer cooling bin; the hydrogen fuel cell stack is vertically arranged in the inner cooling bin; the inner cooling bin is a hollow rectangular shell with two open ends, and a through hole through which an air source is conducted to the hydrogen fuel cell stack is formed in the side wall in a penetrating manner; the outer cooling bin is a hollow rectangular shell with two open ends; the air suction module is vertically arranged in the middle of the inner cooling bin; and the air supply module is vertically arranged in the air cavity in a sliding mode, and the air supply module comprises an upper limiting unit and a lower limiting unit which are arranged in the air cavity in a sliding mode. According to the invention, efficient heat dissipation can be carried out on the hydrogen fuel cell stack, the heat dissipation section can be dynamically adjusted, and the heat dissipation efficiency is high.

The invention relates to the technical field of fuel cells, in particular to a heat dissipation device for hydrogen fuel cell stacks, which comprises a through pipe, a drainage fan, drainage plates and an opening degree adjusting assembly, a plurality of cell stacks are arranged between two end plates, a cooling cavity is formed between the adjacent cell stacks, and cooling plates are arranged on two sides of each cell stack, so that the heat dissipation effect is improved. External air is conveyed to the cooling cavities through the penetrating pipes penetrating through the end plates and the cell stack, airflow power is provided by the drainage fans, the air exchanges heat with the cooling plates in the cooling cavities and then is guided to the outer side surface of the cell stack through the drainage plates arranged around the cooling cavities, and directional cooling of a cell stack shell is achieved. The opening adjusting mechanism is arranged in the cooling cavity, and the distance between the drainage plate and the surface of the cell stack can be adjusted in real time according to temperature feedback, so that the section and the flow speed of an airflow outlet are changed, the heat dissipation intensity of the outer side of the cell stack is dynamically controlled, and the problem that the temperature of the outer side of an existing hydrogen fuel cell stack is not easy to control is solved.

The invention belongs to the technical field of aircraft design, and particularly relates to an integrated tilting power system integrated with hydrogen fuel cell motor electric control and an aircraft. Comprising a tilting mechanism connected with a machine body; the integrated motor and controller is fixedly connected with the tilting mechanism and located at the end, close to the upstream of the incoming flow, of the tilting mechanism; the tilting rotor wing is mounted at one end, close to the incoming flow upstream, of the integrated motor and controller; the hydrogen fuel cell is fixedly connected with the tilting mechanism and is positioned at one end, close to the downstream of the incoming flow, of the tilting mechanism; the nacelle shell wraps the tilting mechanism, the integrated motor, the controller and the hydrogen fuel cell; the nacelle outer heat dissipation fins wrap the nacelle in the circumferential direction; and the tilting mechanism, the integrated motor and controller and the liquid cooling radiating pipeline of the hydrogen fuel cell exchange heat with the radiating fins outside the nacelle.

The invention belongs to the technical field of power supply and distribution, and particularly relates to a hydrogen-lithium hybrid power supply multi-mode uninterruptible power supply system, a control method and a storage medium, and the system comprises a hydrogen energy power supply vehicle, a lithium battery energy storage unit, a power conversion subsystem PCS, a voltage phase tracking module, a static change-over switch STS and a control unit. According to the invention, through cooperative work of the lithium battery and the hydrogen fuel cell, millisecond-level rapid switching during commercial power failure is realized, continuity of load power supply is ensured, and the problem of starting delay of a traditional hydrogen energy system is solved. Intelligent cooperative control of hydrogen energy and lithium batteries is realized according to different scenes, energy distribution is optimized, and the operation efficiency and stability of the system are improved. The control unit monitors the operation state of each part of the system in real time, calculates the dynamic efficiency and grid-connected / off-grid stability control quantity of the system, generates a control signal according to the dynamic efficiency and the grid-connected / off-grid stability control quantity, coordinates the work of each part, and ensures that the system can operate efficiently and stably in various operation modes.

A coordinated optimization method and system for a hydrogen fuel cell vehicle, a device, and a medium. The method includes: determining a target output voltage and a target output current corresponding to a stack in a hydrogen fuel cell vehicle; determining a sub-stack efficiency score corresponding to one of sub-stacks, and determining a sub-stack stability score corresponding to the sub-stack; obtaining a comprehensive score of the sub-stack efficiency score and the sub-stack stability score, and determining a primary stack and a secondary stack from the sub-stacks according to a comprehensive score result; generating, according to the target output voltage and the target output current, a primary stack output parameter corresponding to the primary stack and a secondary stack output parameter corresponding to the secondary stack; and dynamically adjusting an operating state of the primary stack, and dynamically adjusting an operating state of the secondary stack.

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.

The invention belongs to the technical field of catalysts, and discloses a rare earth platinum alloy catalyst and a preparation method and application thereof. The catalyst comprises a nitrogen-doped carbon carrier, and a PtGd alloy and a Ni elementary substance are loaded on the nitrogen-doped carbon carrier. The preparation method comprises the following steps: (1) preparing a Gd-ZIF material; and (2) uniformly mixing the Gd-ZIF, the platinum source solution and the nickel source solution, carrying out vacuum drying treatment, heating to 700-1000 DEG C in a reducing atmosphere, keeping the temperature for 1-2 hours, and cooling to room temperature to obtain the rare earth platinum alloy catalyst. The invention discloses application of a rare earth platinum alloy catalyst which is used as a cathode oxygen reduction reaction catalyst of a hydrogen fuel cell. The preparation method disclosed by the invention is simple to operate and can be used for large-scale preparation; the Pt content of the rare earth platinum alloy catalyst prepared by the method is reduced to 13%, and the cost of raw materials is directly and greatly reduced; the maximum half-wave potential of the rare earth platinum alloy catalyst can reach 0.93 V vs.RHE which is far higher than that of commercial Pt / C.

The invention discloses an electrothermal hydrogen comprehensive energy multi-target collaborative planning operation method, which comprises the following steps: obtaining a photovoltaic and electrical load typical day by using a contour coefficient method and an ordered clustering algorithm, generating a wind power and thermal load typical day by using an ISODATA algorithm improved by a local density formula, and constructing an electrolytic cell and hydrogen fuel cell equipment refined dynamic efficiency model; the method comprises the following steps: constructing a multi-target collaborative bilevel planning operation model, solving the multi-target collaborative bilevel planning operation model by adopting an NSGA-II algorithm and a Gurobi solver to obtain a target capacity Pareto frontier solution set, selecting an optimal solution by utilizing a TOPSIS method, and outputting a capacity configuration scheme. According to the method, the economical efficiency, the low-carbon property and the hydrogen production reliability of the system are considered, meanwhile, the hydrogen energy utilization rate is increased, more accurate optimal configuration of the capacity of the wind-solar-hydrogen energy equipment is achieved, and reference is provided for actual planning operation.

A commercial vehicle having various GVWR configurations with a vehicle body with two or more axles, and a cab that does not pivot relative to the vehicle body, and a battery-electric-powered or hydrogen-electric-powered propulsion system. The vehicle has a center of gravity that is substantially lower, and a track width which is substantially narrower, than an articulating tractor-trailer combination with a trailer size comparable to the vehicle body of the present invention, providing substantially increased stability, and with all axles preferably being steerable E-axles, substantially improving the turning and trailing of the vehicle. Additional attributes are improved safety, increased payload weight and cubic capacity, higher productivity and lower maintenance costs. Many other advantages flow from this vehicle design.

The invention relates to the technical field of energy management, in particular to an energy management method and device for a hydrogen fuel cell passenger car in a plateau region and the passenger car, and the method comprises the steps that historical driving working condition data of the hydrogen fuel cell passenger car and topographic data of the plateau region are obtained; performing data preprocessing on the historical driving condition data and the topographic data, and extracting target driving condition features and target topographic features from the preprocessed data; and generating a training data set according to the target driving working condition features and the target topographic features, training an energy management model based on the training data set, and performing energy management on the hydrogen fuel cell passenger car during driving in the plateau area by using the trained energy management model. Therefore, the problems that in the prior art, a standard working condition database is not suitable for special terrain environments such as plateau, and EMS research on energy consumption and performance influences of the hydrogen fuel cell vehicle in the environments is insufficient are solved.

The invention discloses a waste water and waste heat utilization management system for a hydrogen fuel cell hybrid power logistics truck. The waste water and waste heat utilization management system comprises a motor and transmission module, a storage battery module, a heat dissipation module, a fuel cell module, a power electronic module, a sensor module, a data analysis module and a heat dissipation control module. In special extremely cold weather, waste water and waste heat are recycled and utilized to heat the battery, the battery performance is optimized, meanwhile, the battery reaction can be promoted, and the battery efficiency is improved; when a truck is in a daily driving state and is braked, waste water generated by operation of a hydrogen fuel cell is fully utilized, and after cleaning treatment, spraying cooling is carried out on areas around tires and hubs, so that driving safety is ensured, and the service life of the tires is prolonged; in addition, the system is further integrated with an intelligent early warning and fault diagnosis system based on waste heat, heat changes of key components are monitored in real time, and rapid diagnosis and processing of faults are achieved.

The invention discloses a hydrogen fuel cell system which comprises a box body and further comprises a Venturi tube arranged at the uppermost part of the box body in a penetrating manner, a tail gas treatment assembly; the hydrogen recycling tank is arranged in the box body, an input pipe of the hydrogen recycling tank is communicated with the output end of the tail gas treatment assembly, an output pipe of the hydrogen recycling tank is communicated with the input end of the hydrogen circulating pump, and the output end of the hydrogen circulating pump is communicated with the hydrogen recycling pipe; a hydrogen dilution assembly; and a wastewater recovery assembly. According to the hydrogen fuel cell system, the problem that a reasonable, environment-friendly and recycling treatment method for tail gas is lacked at present is solved.

The invention discloses an intelligent cooperative control method and system for an extra-heavy hydrogen energy special vehicle, and belongs to the technical field of new energy vehicles. The method comprises the steps of collecting vehicle state data through a sensor network; based on the state data, adopting a model predictive control (MPC) algorithm to solve an optimal torque and distributing the optimal torque to the distributed driving system; according to the part temperature data, a thermal system is regulated and controlled through a thermal management algorithm TMS; and preprocessing the hydrogen system data, inputting the hydrogen system data into the LSTM model, and outputting leakage probability and positioning to execute multi-stage early warning. The system comprises a central controller, a sensor network and a combined driving system. Through multi-core domain control deep fusion of MPC, TMS and LSTM, global optimization collaboration of multiple groups of high-power hydrogen fuel cells, a high-density high-power energy storage battery pack, a liquid hydrogen storage and safety module, multiple groups of axial flux motor driving systems, a sensing network and central control extra-heavy vehicle parts is realized; and the endurance mileage of the vehicle and the intelligent control heavy load performance in a mine field and a special scene are effectively improved.

The invention relates to the field of hydrogen fuel cells, in particular to a hydrogen fuel cell with a rapid cooling function. Comprising a plurality of electrode plates, a heat dissipation plate is arranged between every two adjacent electrode plates, a plurality of cooling flow channels are evenly distributed in each heat dissipation plate, each cooling flow channel extends from one side of the heat dissipation plate to the other side of the heat dissipation plate, each cooling flow channel is provided with an inlet connector and an outlet connector which are communicated with the outside, each inlet connector is provided with a flow control valve, and each outlet connector is provided with a flow control valve. Each heat dissipation plate forms a plurality of cooling areas according to distribution of the corresponding cooling flow channels, and a temperature sensing structure is arranged at the position, on the surface of the corresponding cooling area, of the outer side of each heat dissipation plate. Through cooperation of the straight-through flow channel and the spiral structure in the heat dissipation plate, low-resistance efficient heat dissipation and uniform distribution of multiple cooling flow channels are achieved, temperature difference induction and precise flow control are combined, the flow speed of cooling liquid is adjusted in real time, it is ensured that the temperature of a galvanic pile is uniform, local overheating is prevented, and the running stability and safety of a fuel cell are improved.

The embodiment of the invention discloses an electricity-hydrogen-heat energy system construction method for a multi-type energy demand scene. The method comprises the following steps: constructing a system simulation model corresponding to an electricity-hydrogen-heat energy system, and determining a target limiting condition corresponding to the system simulation model in a target energy demand scene based on a target cascade analysis method; and finally, determining system target equipment parameters of the electricity-hydrogen-heat energy system under the target limiting condition according to the annual total construction resource function, and constructing a target electricity-hydrogen-heat energy system according to the system target equipment parameters. Through the construction method of the target electricity-hydrogen-heat energy system, the optimal system equipment parameters are automatically and correspondingly determined while the multi-type energy requirements in different scenes are met, the system construction cost is reduced, heat recovery of the hydrogen fuel cell is achieved by introducing the heat storage tank, the renewable energy utilization efficiency of the system is improved, and the energy utilization efficiency of the system is improved. And the use satisfaction of the user is improved.

The invention provides a hydrogen fuel cell catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts, the catalyst comprises an N atom modified carbon carrier and platinum alloy nanoparticles loaded on the surface of the carbon carrier, the platinum alloy nanoparticles are binary or multicomponent alloys formed by Pt and metal M, the molar ratio of platinum to the metal M is (0-10): 1, and the molar ratio of platinum to metal M is (0-10): 1. The weight ratio of the N atom modified carbon carrier to the platinum alloy nanoparticles is (25-80): (75-20). According to the preparation method of the hydrogen fuel cell catalyst, the N-modified carbon-supported PtFe alloy is prepared by a two-step pyrolysis method, so that the use amount of Pt is effectively reduced, the cost is controlled, and the utilization rate of Pt is increased; through the strong coordination capability of the 1, 10-phenanthroline, the formed Fe-N-C layer can restrain the growth and agglomeration of the PtFe alloy nanoparticles, the adsorption to a reaction intermediate is weakened, and the oxygen reduction activity and stability of the alloy catalyst are improved.

The invention relates to the technical field of new energy automobiles, and provides a hydrogen fuel cell automobile thermoelectric-thermal management cooperative system and a new energy automobile, and the system comprises a hydrogen fuel electric pile, a main cooling loop and a secondary cooling loop connected in parallel with the hydrogen fuel electric pile. The hot end and the cold end of the thermoelectric conversion module are connected to the primary loop and the secondary loop respectively. A cab evaporator and an auxiliary evaporator are sequentially connected in series through a refrigerant loop of the vehicle-mounted air conditioning system, and the auxiliary evaporator is connected to the upstream of the cold end of the thermoelectric conversion module on the secondary loop in series. The controller controls the air conditioner to operate based on the passenger compartment refrigeration demand. When the air conditioner is started to cool the passenger compartment, the refrigerant flowing through the auxiliary evaporator can cool the secondary loop cooling liquid again, so that the temperature of the cold end of the thermoelectric conversion module is reduced, the power generation temperature difference is increased, the waste heat power generation efficiency is improved, and the overall heat dissipation capacity of the system is enhanced synchronously. According to the system, intelligent coupling and energy gradient utilization of air conditioner refrigeration, waste heat recovery and whole vehicle heat management are achieved.

The present application relates to the field of vehicle power technology, and particularly relates to a hydrogen fuel cell with air purification and circulation functions, a self-cleaning air guide assembly is arranged at the air inlet of the fuel cell, the preliminarily filtered air in the vehicle is introduced into the fuel cell by the air guide fan, the air is secondarily filtered by the filter membrane during the air inlet process, the filter membrane can be retracted and extended by the first retraction and extension piece and the second retraction and extension piece installed in the air inlet window, at the same time, the air inlet cover guides the unreacted residual air back to the installation chamber through the air guide pipe, the outside of the filter membrane is back-flushed, the attached impurities are discharged through the blow-off port, the filtering efficiency of the filter membrane is effectively maintained, in addition, the inner side knocking assembly is arranged in the installation chamber, when the first retraction and extension piece and the second retraction and extension piece rotate, the knocking plate can knock the inner side of the filter membrane, the attached impurities are promoted to fall off, so that the self-cleaning effect is further improved, the dust holding capacity and the self-cleaning performance of the filtering assembly are significantly improved, and the maintenance frequency and the replacement requirement are reduced.

The invention relates to the technical field of hydrogen fuel cell water management, and discloses a hydrogen fuel cell multi-coupling water management electrical control method and system.The control method comprises the steps that membrane hydration-temperature cooperative control logic is adopted, and the humidification amount of a humidifier, the flow of a cooling water channel and the opening degree of a purge valve are dynamically adjusted; the membrane hydration number and the cathode-anode temperature gradient are optimized; a dynamic variable-load pre-judgment control logic is adopted, the opening degree of a purge valve and the humidification amount of a humidifier are adjusted, and the water balance response speed and the water purification amount stability are optimized; and adjusting the opening degree of a cathode intake manifold on the corresponding side and the opening degree of a drain valve in an anode low-lying area by adopting a posture adaptation control logic, and optimizing the airflow distribution uniformity and the membrane hydration stability. Through membrane hydration-temperature cooperative control, dynamic variable load pre-judgment control and attitude adaptation control, the technical problems of out-of-control membrane hydration and ice blockage, dynamic variable load response lag, water balance unbalance caused by attitude change and the like in a low-temperature environment are solved.

The invention discloses a self-adaptive energy management method for a hydrogen-sodium hybrid power system of an unmanned aerial vehicle, and the method comprises the steps: S1, building an MPC state space model of the hybrid power system; s2, collecting a flight control instruction sequence and state data; s3, based on the flight control instruction, generating a predicted total load power sequence through a pre-trained neural network model; s4, resetting the MPC state space model based on the state data collected at the moment k; s5, constructing an objective function and constraint conditions; and S6, solving an optimal hydrogen fuel cell output power sequence, adopting a rolling strategy to obtain the power set value output of the hydrogen fuel cell at the k moment, and determining the power set value of the sodium ion battery in real time according to an energy conservation equation. According to the method, a self-adaptive hybrid power system energy management scheme is established by deeply fusing feedforward prediction based on a flight control instruction, multi-target self-adaptive optimization and closed-loop feedback correction.

A hydrogen pressure reducer for a hydrogen supply system of a hydrogen fuel automobile relates to the technical field of hydrogen pressure reducers and comprises a valve body, a diaphragm type pressure reducing mechanism, a pilot-operated electromagnetic valve, a gas inlet and a gas outlet. The interior of the valve body is divided into a high-pressure cavity and a low-pressure cavity through the valve The diaphragm type pressure reducing mechanism is composed of a valve element assembly, a diaphragm assembly and a pressure adjusting assembly which cooperate to enable the output pressure of the air outlet to be kept stable, and assembly errors are eliminated. The valve element assembly is provided with a necking part to adjust the opening degree of a throttling hole, and accurate control is achieved. The base provides guiding constraint, and reliable sealing is ensured. The diaphragm assembly adopts a supporting disc, a diaphragm, a pressing disc and a locking nut fixing structure, so that the diaphragm is prevented from deforming, and the service life is prolonged. The pressure adjusting assembly comprises an upper cover, a pressure adjusting spring, a pressure adjusting spring seat and a pressure adjusting stud, and the pressure adjusting accuracy and stability are guaranteed. The overall reliability, sensitivity and safety of the hydrogen pressure reducer are improved.

The invention discloses a hydrogen-electricity hybrid energy management method for a low-altitude operation composite wing unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle energy management, and the method comprises the steps: S1, constructing an energy management system which comprises a working condition recognition module, an energy state monitoring module, a decision module and an execution module; s2, real-time operation parameters of the composite-wing unmanned aerial vehicle are collected through a working condition recognition module, and the current operation working condition of the composite-wing unmanned aerial vehicle is judged; s3, collecting real-time energy parameters of the hydrogen fuel cell and the power cell through an energy state monitoring module; s4, the decision module outputs a target energy supply strategy based on the current operation condition and the real-time energy parameters; and S5, the execution module controls the energy supply states of the hydrogen fuel cell and the power cell according to the target energy supply strategy. The three typical working conditions of the low-altitude operation composite wing unmanned aerial vehicle are accurately judged through the working condition recognition module, a decision matrix is constructed in combination with multi-dimensional energy parameters, dynamic matching of energy supply strategies is achieved, and the working condition adaptability is enhanced.

The invention discloses a method for predicting hydrogen diffusion of a multi-coating material on the surface of a material in a vacuum environment, and belongs to the technical field of hydrogen diffusion of materials. On the basis of a hydrogen atom diffusion mass transfer theory in a single-layer matrix material, a hydrogen atom diffusion mass transfer model of the double-coating material is constructed. The hydrogen atom diffusion differential equation, the capture / removal differential equation and the boundary desorption / adsorption differential equation of the single-layer matrix material are established in combination with respective material parameters corresponding to different materials of each layer, boundary condition parameters are introduced into an interlayer interface, the flux continuity and concentration transition relation between the matrix and the plating layer is processed, and the plating layer is obtained. And further obtaining the hydrogen concentration distribution and the dynamic hydrogen release rate in the multi-coating material. The prediction method disclosed by the invention is suitable for any coating combination, can quickly migrate only by replacing material data, and is suitable for multiple fields such as electronic packaging, vacuum devices, hydrogen fuel cells and the like.

The invention belongs to the technical field of power grids, and particularly relates to a hydrogen fuel cell grid-connected inverter fault test and ride-through method. Comprising the following steps: S1, simulating three-phase symmetrical voltage drop, inter-phase voltage drop and single-phase voltage drop of a power grid through a low-voltage fault generation device; s2, collecting the voltage of a power grid through a high-precision voltage sensor, and when the voltage of the power grid drops, judging whether the system needs to carry out low-voltage ride through at the moment according to a distributed energy low-voltage ride through curve; and S3, when the system needs to carry out low-voltage ride-through, a dual-second-order generalized integrator pre-filtering phase-locked loop (DSOGI-PLL) is combined with grid-connected point voltage full-feedback compensation, negative-sequence components generated by symmetric and asymmetric drop of the power grid voltage are eliminated, and current impact suppression and negative-sequence current elimination are realized. The problem of power grid synchronization under the condition of power grid voltage drop is finally solved.

An aircraft power plant, has: an air mover for propelling an aircraft; an electric motor drivingly engaged with the air mover; a gas turbine engine having a compressor for pressurizing air, a combustor in which the pressurised air is mixed with fuel and ignited for generating combustion gases, and a turbine for extracting energy from the combustion gases; and a hydrogen fuel cell operatively connected to the electric motor for powering the electric motor with electricity generated by the hydrogen fuel cell, the hydrogen fuel cell operable to generate electricity using the air from the compressor and hydrogen from a source of hydrogen.

A locomotive has DC or AC traction motors, powered by a hydrogen fuel cell, and optionally other sources such as regenerative braking. The traction motors of the locomotive may be connected to a set of independent DC choppers or AC inverters, linked via a common DC bus, configured to regulate power from the one or more power sources. A manager module, among other functions, may receive inputs and signals to coordinate delivery of electricity from the sources to the motor. A method for retrofitting a legacy locomotive may include removing a generator and a control apparatus configured for diesel fuel, and installing a kit of apparatus configured to be powered by a hydrogen fuel cell. A railway system for use by locomotives powered by hydrogen has one or more hydrogen-generation stations deployed near a track of the railway system.

The invention relates to the technical field of automobile chassis dynamics control, and discloses a hydrogen energy heavy truck omnidirectional degree-of-freedom optimization method, which comprises the following steps: acquiring multi-source sensor data and hydrogen fuel cell system state data of a hydrogen energy heavy truck, and executing time synchronization and noise preprocessing; carrying out real-time identification on the key state parameters of the vehicle by utilizing a nineteen-degree-of-freedom vehicle dynamics model and a self-adaptive filtering algorithm; a layered omnidirectional coordination control architecture is constructed and comprises a main control layer, a scheduling layer and an execution layer, and the main control layer generates a global motion control target; carrying out multi-objective optimization solution on the scheduling layer, and calculating to obtain an expected acting force distribution instruction; and the execution layer converts the instruction into a bottom layer execution control signal and drives the subsystems to cooperatively act so as to realize omni-directional degree-of-freedom optimization control. According to the invention, the limitations of poor coordination and difficulty in multi-target optimization caused by independent control of subsystems of a traditional chassis can be broken through, and accurate control of the hydrogen energy heavy truck under complex working conditions is realized.