95 results about "Home fuel cell" patented technology

There is provided a high-efficiency DC-DC converter which comprises a voltage resonance circuit to which electric power from a low-voltage direct-current power supply, including a household fuel cell and a solar cell, is input and performs DC-AC conversion by zero-voltage switching, an insulating high-frequency transformer which transmits the converted power, a current resonance circuit which is provided on the secondary side of the transformer and performs zero-current switching, a rectifier circuit which rectifies the output from the current resonance circuit, and a smoothing circuit which rectifies the output from the rectifier circuit.

The object of the invention is the coupling of a hydrogen fuel cell to an enzymatic process for the production of electricity and the transformation and sequestration of CO2. Gaseous CO2 emissions from processes such as hydrocarbon reforming are transformed into carbonate or bicarbonate ions and hydrogen ions by the enzymatic system in order to prevent their contribution to the greenhouse effect. The hydrogen ions resulting from the enzymatic process are recovered and combined in order to supply the hydrogen fuel cell. Finally, water, a by-product of the oxidizing reaction of the hydrogen fuel cell, is recovered and recycled back into the aqueous enzymatic system.

The invention discloses a thermal management system for a fuel cell of a commercial vehicle. The thermal management system comprises a controller, a hydrogen fuel cell system, an electric control three-way valve, an electric heater, a radiator, a variable frequency fan, a make-up water tank, a variable frequency water pump, a deionizer, a throttle valve, a particulate matter filter, a temperaturesensor I and a temperature sensor II. Due to the cell thermal management system, a coolant of the thermal management system flows through small circulation and is rapidly warmed when the vehicle is started at the low temperature, the temperature of the coolant is guaranteed to reach the optimal temperature range for the reaction of the hydrogen fuel cell within a short period of time, the reactionefficiency of the hydrogen fuel cell is improved, the small circulation of the coolant is gradually switched to large circulation through the electric control three-way valve after the temperature ofthe coolant reaches the set optimal reaction temperature range, a better cooling effect is achieved, the hydrogen fuel cell is within the optimal reaction temperature range, and the reaction efficiency is improved. The rapid warming of the thermal management system in the cold start also reduces the damage on the cell, and the service life of the cell is prolonged.

A hydrogen fuel cell driven HVAC and power system for powering a vehicle during engine-off time. The system includes a power storage and fuel cell conversion unit integrated with a high efficiency reverse cycle heat pump to provide cab comfort and auxiliary power to a vehicle when the engine is off. Hydrogen gas is generated from vehicle wasted energy during coasting, braking and at times of engine peak performance and is safely stored in metal hydride storage containers at low pressure. During engine-off time, a fuel cell draws from the stored hydrogen and works in conjunction with the heat pump to heat and cool and provide electrical power to the vehicle. The system is a green energy solution to anti-idling regulations as it produces no harmful EPA emissions as it provides air conditioning and power to the vehicle during engine-off time.

The invention discloses a cooling system of a hydrogen energy tramcar fuel cell. The cooling system comprises a hydrogen fuel cell, a circulating device, a cooling device and an electric heating pipe, wherein the hydrogen fuel cell, the circulating device and the cooling device are sequentially connected to form a cooling circulating loop; one end of the electric heating pipe I communicates with the circulating device through a pipeline, the other end communicates with the hydrogen fuel cell through a pipeline, and a heating circulating loop is formed. The temperature of a coolant entering the hydrogen fuel cell can be controlled within the best reaction temperature range accurately and more stably, so that the hydrogen fuel cell is located in a proper reaction temperature environment, and the reaction efficiency of the hydrogen fuel cell is improved; the cooling system is simple in structure, has an obvious effect and saves energy.

A complete fuel cell system (10) is described. The fuel cell system (10) comprises at least two fuel precursors (16, 18) that react to create hydrogen. A solid fuel precursor (18) can be carried in disposable fuel cartridges (100). A passive pressure control system including a dose pump (22) and a pressure equalization system (24, 300, 504) is provided to dose a liquid fuel precursor (16) to the solid fuel precursor (18) in the fuel cartridge (100). An outer wall (102) of the fuel cartridge can form a part of the passive pressure control system. The solid fuel precursor may include larger metallic particles coated by another fine metallic particles such that multiple micro galvanic cells are formed on the surface of the larger metallic particles. The fuel cell system may also include a gas buffer (40) that stores produced hydrogen that in unneeded by the fuel cell, and a water trapping mechanism (604). The fuel cell system may also have an electronic vent (46) that consumes unneeded hydrogen.

A solid-oxide fuel cell system having a compact, highly space-efficient basal manifold for conveying high temperature air, exhaust, and hydrogen-rich reformate fuel to and from the core components of the system. The manifold is a three-dimensional assembly of plates and partitioned elements which are easily and inexpensively formed. When assembled, the manifold comprises a network of passageways which allow for the mounting, close-coupling, and integration of critical fuel cell system components, including heat exchangers, a tail gas combustor and fuel reformer, solid-oxide fuel cell stacks, check valves, and oxygen scavengers.

The invention discloses a hydrogen power system based on a heat self-balancing solid hydrogen source reactor. The hydrogen power system comprises a hydrogen source, the heat self-balancing solid hydrogen source reactor, a hydrogen fuel cell, an air compression system and a vacuum pump; and an inlet of the heat self-balancing solid hydrogen source reactor is connected with the hydrogen source, an outlet of the heat self-balancing solid hydrogen source reactor is divided into two paths, one path is connected with the hydrogen fuel cell, and the other path is connected with the vacuum pump. According to the hydrogen power system, a phase-change material can store heat released by hydrogen absorption reaction in a latent heat form and release the heat during hydrogen desorption reaction, thus,heat in the hydrogen absorption process is used for the hydrogen desorption process, heating and cooling devices are omitted, the cost is reduced, the energy utilization rate is increased, and meanwhile, the hydrogen absorption and desorption reaction rate can be increased.

This invention relates to a discoloration indicator for checking the life span of a desulfurization adsorbent, and a desulfurization reactor and a desulfurization system including the same, and specifically, to a discoloration indicator for checking the life span of a desulfurization adsorbent able to effectively adsorb and remove organic sulfur compounds from fossil fuels, including natural gas or LPG containing the organic sulfur compound, and to a desulfurization reactor and a desulfurization system including the same. This invention makes it possible to remove the organic sulfur compound using the desulfurization adsorbent and to check the replacement time of the adsorbent with the naked eye or using an electrical signal, and thus may be applied to the treatment of natural gas or LPG requiring desulfurization, and also to hydrogen generators for home fuel cell generation systems or distributed fuel cell generation systems requiring that devices be simple, or requiring unmanned operation.

The invention discloses an island comprehensive energy system based on a hydrogen fuel cell. The system comprises a power generation unit for providing energy power supply, an energy storage unit forstoring energy and a load unit for consuming energy by an offshore island; and the power generation unit comprises a hydrogen fuel cell, the energy storage unit comprises a hydrogen compression moduleof an electrolytic hydrogen production system, and the load unit comprises an electrolytic hydrogen production system complete device and a hydrogen storage system power utilization module. The powergeneration unit also comprises a photovoltaic power generation system, a wave energy generator set, a wind generator set and a tidal generator set; the photovoltaic power generation system is configured and distributed on the roof of a building on an island and a wide region on the island, the wave energy generation device is arranged in a sea area around the island, the wind generator set is arranged on an offshore tidal flat and a high-altitude mountain top on the island, and the tidal generator set is arranged at a high-altitude valley by the sea; and the load unit also comprises an external network load.

The invention belongs to a high energy power supply technology and provides an integrated combined power supply of a metal oxygen cell / hydrogen-oxygen fuel cell, in order to solve the problems of corrosion and hydrogen evolution of an anode of the metal oxygen cell and enhance the energy utilization ratio. The integrated combined power supply of the metal oxygen cell / hydrogen-oxygen fuel cell is characterized by comprising two parts, including a main power supply metal oxygen cell and a hydrogen-oxygen fuel cell. The integrated combined power supply sequentially consists of a metal anode, an electrolyte cavity, a hydrogen-oxygen fuel cell anode, a diaphragm, a cathode and a cathode cavity, and a structure that two kinds of cell cathodes are integrated into a whole and two kinds of cell anodes share a same cell cavity is adopted. When the combined power supply generates power, a hydrogen by-product of the metal oxygen cell is directly used as fuel of the hydrogen-oxygen fuel cell, and therefore, the hydrogen by-product of the metal oxygen cell is eliminated in situ, and a part of energy can be recovered. Compared with the prior art, the invention has the advantages of simple structure and convenient use and maintenance and is suitable for an emergency power supply and an underwater power supply which need high energy.

The invention relates to a proton exchange membrane fuel cell unit and a cell stack, belonging to the technical field of hydrogen fuel cells. The battery unit is composed of hydrogen distributor, negative electrode flow field plate, membrane module MEA, positive electrode flow field plate and oxygen distributor. The hydrogen inlet and outlet are connected with the hydrogen inlet and outlet of negative electrode flow field plate respectively. The oxygen inlet and outlet are connected with the oxygen inlet and outlet of positive electrode flow field plate respectively. As that battery unit of the invention has independent hydrogen and oxygen supply port, the bipolar plate in the prior art is canceled, and the heat dissipation is replace by the liquid cooling circulation in the original structure through the external heat dissipation device, thereby avoiding the risk of the coolant leaking inside the battery, and at the same time, the gas quantity of each battery unit can be timely controlled, so as to ensure that the battery is not invalidated due to the anti-polar reaction. The series welding structure of the positive and negative electrodes of the battery cell is adopted to reducethe series resistance and improve the power characteristics. Greatly reducing manufacturing costs; Simplified manufacturing and assembly process facilitates large-scale production.

The invention discloses a hydrogen fuel cell system and a control method thereof. The control method comprises the following steps: performing hydrolysis to produce hydrogen by utilizing a reaction solution, controlling the reaction pressure and temperature of a reaction chamber, the temperature of a radiator and the pressure of a hydrogen storage chamber by a controller, and controlling the solution amount of the reaction solution. The method is a safe, high-efficiency and high-practicality hydrogen production technology. The hydrogen production fuel cell disclosed by the invention is short in start and load response time and high in reliability, can perform integrated control on temperature, humidity, pressure, catalyst contact conditions, solution supply, power regulation and other processes and parameters, and a gas source with controllable pressure and flow can be provided for the fuel cell. The reaction solution is injected into a tubular reactor filled with catalysts by adopting a hydraulic pump, and the hydrogen production speed is controlled by controlling the flow velocity of the reaction solution; change of hydrogen demand quantity is quickly responded, and accurate control of the output hydrogen flow and intelligent control of system parameters can be realized.

A SOFC type fuel cell being small in size and large in output while providing good efficiency and being excellent in starting characteristics and load variation characteristics, is presented. A honeycomb type solid-oxide fuel cell is formed of a honeycomb structural body having square cell in cross section, wherein cells adjacent to wall surfaces constituting a fuel pole cell (a) function as air pole cells (b) and cells adjacent to the corners of wall surfaces of the fuel pole cell and adjacent to wall surfaces constituting air pole cell function as cooling air cells (c), whereby fuel pole cells, air pole cells and cooling air cells are arranged in longitudinal and lateral rows so that cells of the same type appear in every other location.

A unit for generating an electrical current includes an electrolysis cell and a hydrogen fuel cell having a common mid-electrode. This mid-electrode is hydrophobic and separates a PEM electrolyte in the fuel cell from an electrolyte mixture of water and a carbon compound in the electrolysis cell. Electrolysis of the water produces hydrogen at the mid-electrode and carbon dioxide at the anode of the unit. The hydrogen diffuses into the hydrogen fuel cell through the mid-electrode but it prevents the water mixture in the electrolysis cell from contacting the PEM electrolyte in the fuel cell. Oxygen is provided to react with hydrogen protons at the cathode of the fuel cell to produce water. An external circuit is provided between the respective unit anode at the electrolysis cell and the unit cathode at the fuel cell for carrying the electrical current generated by the unit.

A system for measuring available energy in a metal fuel cell is provided. The system comprises first componentry for measuring an electrical property of a mixture formed from one or more reaction products dissolved in a reaction medium. The electrical property may be such as to bear a known relationship with the concentration of the one or more reaction products. Using this known relationship, second componentry estimates the concentration of the one or more reaction products, and, responsive thereto, determines the available energy in the fuel cell.

A method for starting a frozen fuel cell stack includes discontinuing reactant humidification before shutting down the fuel cell stack. The anode and cathode are purged with the dry reactants. The fuel cell stack is soaked at freezing temperatures. During subsequent startup, dry reactants are initially delivered. An outlet temperature of the anode and a current load of the fuel cell stack are measured. The dry reactants are shut off when the temperature of the anode outlet or the current load reach predetermined values. The open circuit voltage potential of the fuel cells is monitored and compared to a first voltage value. When the open circuit voltage exceeds the first value, the fuel cell stack begins supplying current load. The current load of the fuel cell stack is increased or decreased based on a difference between the minimum voltage and a second voltage value.

A fuel cell for use in downhole applications stores steam created by the chemical reaction in a desiccant like Zeolite. The fuel cell also uses ambient hydrostatic pressure to increase cell voltage and power-density.

The invention belongs to the technical field of ammonia decomposition, in particular to an ammonia fuel cell system and an electric device. The ammonia fuel cell system comprises an ammonia decomposition reaction device, a heating device, a hydrogen fuel cell, a DC / DC converter and an inverter which are connected in sequence, a battery pack and a heat exchanger. The ammonia fuel cell system can run stably for a long time and form recycling utilization and have the advantages of high flexibility, low energy consumption and high system utilization rate. The heat exchanger of the system can make the energy produced by ammonia decomposition preheat ammonia gas and realize recovery and utilization of waste heat. The battery pack can make the battery pack respond quickly and output stably and can deal with acceleration and deceleration of the electric device quickly so as to improve the stability of system operation and can transmit the electric energy generated by the hydrogen fuel cell or the electric energy in the battery pack to the outside. The battery pack or the heating device of the system can provide energy for the ammonia decomposition reaction device without external energy for the ammonia decomposition reaction device.

The invention provides a hydrogenation fault diagnosis method of a fuel cell hydrogen system. The method comprises the steps of: obtaining the temperature of each hydrogen storage cylinder in the fuelcell hydrogen system; starting a hydrogen storage cylinder with the highest temperature and closing other hydrogen storage cylinders; obtaining the initial pressure in a pipeline connected with a hydrogen storage module and a hydrogen supply module and starting timing; determining whether the timing reaches or exceeds the preset diagnosis duration or not, if yes, stopping timing and obtaining thecurrent pressure of the pipeline connected with the hydrogen storage module and the hydrogen supply module; and performing fault diagnosis treatment for the initial pressure and the current pressureof the pipeline connected with the hydrogen storage module and the hydrogen supply module. The method can perform automatic checking of whether the fuel cell hydrogen system being in the hydrogen supply state or not prior to hydrogen addition so as to avoid the safety problem that the hydrogen is injected directly because a user forgets to close the hydrogen fuel cell system.

The fuel cell system includes a fuel cell; a power conditioner that converts a cell power supplied from the fuel cell to a power corresponding to a load; a capacitor to which an excessive output power of the fuel cell is charged at the time of a low load operation and from which a power corresponding to the insufficient output power of the fuel cell is discharged at the time of a high load operation; a voltage detection means for detecting a voltage of the capacitor; and a control means that determines the low load operation or the high load operation, calculates an output power from the fuel cell to maintain the excessive power generated at the time of the low load operation within a space capacity of the capacitor, and controls the output power of the fuel cell not to exceed the calculated value.

The invention provides a temperature control method and device for a hydrogen fuel cell. The method comprises steps that after the inlet temperature of a current hydrogen fuel cell, an inlet temperature set value of the hydrogen fuel cell and a reference operation parameter value of a heat dissipation device are obtained, a target operation parameter value of the heat dissipation device is obtained based on the inlet temperature, the inlet temperature set value and the reference operation parameter value; based on the numerical value relationship among the target operation parameter value, a maximum operation parameter value of the heat dissipation device and a minimum operation parameter value of the heat dissipation device, the adjustment amount of a flow adjustment device is obtained; the flow of the cooling liquid in a first circulation path and a second circulation path is controlled based on the adjustment amount of the flow adjustment device. Compared with the prior art, the inlet temperature is controlled through the heat dissipation device and flow control, so control precision of the inlet temperature of the hydrogen fuel cell can be improved under the condition that theheat dissipation device with the same performance is utilized, use efficiency of the hydrogen fuel cell is improved, and the service life of the hydrogen fuel cell is prolonged.

The invention discloses a low-temperature cold start method and system for a hydrogen fuel cell. The method comprises the following steps of setting a target heating rate and a target temperature of the fuel cell; calculating a target output current according to the target heating rate; calculating a target air flow and a target hydrogen flow; starting the fuel cell when a PTC heats a fuel cell cooling system; achieving the target air flow by adjusting the rotating speed of an air compressor; achieving the target hydrogen flow by adjusting a proportional valve; and after the temperature of thefuel cell reaches the target temperature, adjusting the ratio of the air flow to the hydrogen flow to a normal output power corresponding value. According to the low-temperature cold starting methodand system for the hydrogen fuel cell, the concentration difference overpotentials of the hydrogen side and the oxygen side of the fuel cell are used for lowering the external output efficiency of thefuel cell, the chemical energy as much as possible is converted into the heat energy to be used for heating a fuel cell stack body, so that the fuel cell is rapidly warmed up.

The invention discloses an independent power supply system of hydrogen fuel cell. The system comprises a closed shell, a display and a three-layered metal frame; a hydrogen fuel cell galvanic stack, a hydrogen storage bottle and a radiator fan are arranged at the bottom layer of the three-layered metal frame; an inverter and a gas passage control element are arranged at the middle layer of the three-layered metal frame; the inverter is electrically connected with the gas passage control element; a DC / DC (direct current / direct current) converter, a controller and a storage battery are arranged on the upper layer of the there-layered metal frame; the storage battery is electrically connected with the inverter, the DC / DC converter and the controller respectively; and the controller is electrically connected with the display, the radiator fan and the air passage control element respectively. The independent power supply system of the hydrogen fuel cell provided by the invention can overcome the defects that in the prior art, the structure is unreasonable, the thermal radiation is large, the specific power is low, the air supply is single, the carrying is inconvenient and the like, and realize the advantages of reasonable structure, small thermal radiation, high specific power, much air supply and convenience in operation.

The invention provides a hydrogen fuel cell vehicle and a fuel cell purging system thereof. The hydrogen fuel cell purging system comprises a hydrogen fuel cell, a power battery, a storage battery, aDC / DC converter and a low-voltage direct-current bus; the hydrogen fuel cell is provided with an electric accessory; the high-voltage side of the DC / DC converter is connected with the power battery, while the low-voltage side is connected with the low-voltage direct-current bus; the storage battery and the electric accessory are connected with the low-voltage direct-current bus; a switch is arranged on a circuit, which is connected with the low-voltage direct-current bus, of the electric accessory; the switch is closed in the shutdown process of the fuel cell, and the power battery supplies power for the electric accessory through the DC / DC converter and the storage battery; and when it is detected that the DC / DC converter works abnormally, the switch is controlled to be disconnected, andthe power supplying for the electric accessory is stopped. The DC / DC converter and the storage battery are both adopted for supplying power for the electric accessory, so that when the DC / DC converterworks unstably, the storage battery can supply power for the electric accessory, thereby improving the shutdown purging stability of the fuel cell.

The invention discloses a marine fuel cell combined heat and power system which comprises a fuel cell electric pile, a marine power grid, an expansion water tank, an air conditioning system, a hot water supply heat exchanger, a heating heat exchanger and a water-cooled board heat exchanger. The fuel cell electric pile is connected with the expansion water tank, the air conditioning system, the hotwater supply heat exchanger, the heating heat exchanger and the water-cooled board heat exchanger by cooling pipelines. The marine fuel cell combined heat and power system disclosed by the inventionsufficiently utilizes the characteristic that a water temperature and heat at an outlet of the fuel cell electric pile are high and can be utilized in a classified mode, and adopts a radiator installed inside a hull to supply heat to a cabin room and / or provide hot water required by the life; meanwhile, the system also sufficiently utilizes a natural low-temperature heat source function of seawater, does not require a heat dissipation fan and also has no parasitic power consumption; efficiency of the fuel cell system is improved; and meanwhile, for an abnormally high water temperature of the fuel cell system, which is caused by an abnormal working condition of the system, a cell cooler in an air conditioning system loop is adopted to carry out rapid cooling on the system.

The invention discloses a light solid-state hydrogen storage power system for water reuse of fuel cell exhaust gas. The system is characterized in that hydrogen released from a hydrogen source systementers a hydrogen fuel cell, the exhaust gas generated by the hydrogen fuel cell and a part of the air enter a water vapor cooling device, and the cooling water condensed by the water vapor cooling device is injected into the hydrogen source system through a water outlet pipe and a water inlet pipe. The system is advantaged in that light element hydride (a light element hydride bed) is utilized, the water produced after hydrogen electrochemical reaction is recovered and returned to the hydrogen source system for hydrolysis reaction with the light element hydride to produce hydrogen, the weightof the reactant water is eliminated to increase the mass hydrogen storage amount of the system, under the same hydrogen release effect, the system mass is reduced.

A method is for detecting a gas leak between the anode gas region and the cathode gas region of a PEM fuel cell. According to the method, a) the fuel cell is charged with a direct current, and b) the temporal course of the electrical voltage on the fuel cell is measured. Using only a small amount of equipment, a leak test can be carried out on a fuel cell stack. The test is highly sensitive even to extremely small leaks, but can also be used for large leaks, and indicates the exact position of defective fuel cells within the fuel cell.