39 results about "Renewable energy storage" patented technology

The invention discloses a compressed air energy storage system utilizing a wound gas cylinder gas storage array and a control method, the system comprises a compression unit, an expansion unit, a heat exchange unit, a wound gas cylinder gas storage array unit and a control unit of the wound gas cylinder gas storage array unit, and air is compressed and stored in a plurality of high-pressure wound gas cylinders through multi-stage compression and heat energy recovery. When energy is needed, the expansion machine is driven to release energy for power generation after heat energy compensation. And the gas storage array adopts a multi-layer winding gas cylinder modular structure, and has high pressure, high density, low cost and expandability. The control method covers system initialization and state detection, pressure setting in the sequential gas storage and energy release process, real-time monitoring and abnormal response and a safe shutdown mechanism, and has efficient heat energy management, distributed pressure regulation and dynamic control capabilities. According to the invention, the gas storage cost can be effectively reduced, the flexibility, maintainability and environmental friendliness of the system are improved, and the system is suitable for energy storage and peak regulation application of large-scale renewable energy sources.

The invention discloses a wind-solar power generation deep refrigeration energy storage system and method, and relates to the technical field of renewable energy source energy storage, the system comprises a wind power generation device, a photovoltaic power generation device, a deep refrigeration device, a cold storage device and a controller; the deep refrigeration device is connected with the wind power generation device, the photovoltaic power generation device and the cold storage device, and the wind power generation device and / or the photovoltaic power generation device supply power to the deep refrigeration device; the controller is connected with the wind power generation device, the photovoltaic power generation device and the deep refrigeration device. Power is supplied to the power grid through wind and light power generation or electric energy is stored through the cryogenic energy storage technology, the storage system is used for supplying power to the power grid, the stability of renewable energy power supply is improved, and the utilization efficiency of renewable energy is improved.

The invention relates to the technical field of new energy, in particular to a metal-water battery system capable of storing energy and asynchronously producing hydrogen and oxygen, the metal-water battery system comprises a bifunctional catalyst, an iron deposition / dissolution electrode and an acidic electrolyte, and the metal-water battery system is prepared by the following specific steps: S1, stainless steel such as 304 or 316 is subjected to molten salt electrolysis modification to prepare the bifunctional catalyst, and the bifunctional catalyst has OER and HER catalytic activity; s2, taking the modified stainless steel catalyst as a first anode, taking inert electrodes such as a copper sheet or a titanium sheet as a first cathode, and forming a first electrolysis system with an acidic ferrous sulfate solution; and S3, electrolysis is conducted through the first electrolysis system, oxygen evolution reaction is conducted on the first anode, and metal iron is deposited on the first cathode. According to the metal-water battery system considering energy storage and asynchronous production of hydrogen and oxygen, time-space separation of deposition / dissolution of iron and hydrogen-oxygen precipitation is regulated and controlled through the bifunctional catalyst, and safe energy storage and step-by-step production of hydrogen energy / oxygen are achieved; the method is suitable for renewable energy storage, hydrogen energy preparation and distributed energy supply scenes.

The invention relates to the technical field of gravity energy storage multi-machine system power distribution, in particular to a multi-machine system power distribution method, system and device and a medium. Calculating the total efficiency of each stand-alone system based on an efficiency model; constructing a power distribution optimization model based on the total efficiency of each single-machine system; and distributing the power of each unit according to the power distribution optimization model. The method has the beneficial effects that an intelligent power scheduling strategy can be provided for the renewable energy storage system, the energy loss and the equipment overload risk are reduced, and the peak regulation capability and the economic benefit of the power grid are improved.

The application discloses a kind of high-efficiency energy storage system and method based on bipolar membrane electrodialysis, including multiple series setting bipolar membrane stack combination unit, electrode system, electrolyte circulation system, control system and auxiliary equipment.The application utilizes the water dissociation characteristics of bipolar membrane and the ion migration mechanism of electrodialysis, realizes the efficient storage and release of electric energy, is suitable for renewable energy storage, power grid peak shaving and distributed energy system and other fields, and significantly improves energy conversion efficiency, prolongs system life and reduces operating cost by optimizing membrane structure, improving system design and control strategy.

The invention discloses a novel ship comprehensive energy system and method integrating organic Rankine cycle waste heat recovery, and belongs to the field of ship comprehensive energy design. The system comprises a dual-fuel engine, a dual-fuel generator set, a fuel cell, a waste heat boiler, a shaft-driven motor, a lithium battery, an electric refrigerator, a heat pump, an organic Rankine cycle, carbon capture equipment, a carbon trading mechanism, mechanical, electric, heat and cold load requirements in the ship operation process and other accessories. According to the system, by optimizing an energy structure (such as renewable energy storage) and a carbon capture means, the economical efficiency is improved, the double-control target of carbon emission is achieved, the compliance requirements of international maritime affair environmental protection laws and regulations are effectively supported, and green and sustainable development of ships is assisted.

The present invention belongs to the field related to phase change materials, and specifically relates to a high thermal conductivity and high phase change enthalpy carbon nanocomposite phase change microcapsule and its preparation method. The present invention uses flaky graphene oxide as a dispersant to form a water-in-oil Pickering emulsion with graphene oxide as the interface, and adds an initiator to the aqueous phase to polymerize the aniline monomer and the cross-linking monomer in the oil phase at the interface of the Pickering emulsion to form a network polymer layer to fix the capsule thermal conductive particle shell. The microcapsule shell is composed of thermal conductive polymer cross-linked polyaniline and thermal conductive particle graphene oxide. The diameter of the thermal conductive carbon nanoparticles first dispersed in the alkane phase change material is equivalent to the diameter of the capsule, and a thermal conductive path supporting the skeleton structure is formed in the confined space inside the microcapsule, thereby improving the thermal conductivity of the microcapsule. It has the characteristics of high thermal conductivity and high phase change heat storage capacity, and can be applied to renewable energy storage, new energy vehicle thermal management, industrial waste heat utilization, aerospace engineering and other fields.

The application discloses a kind of wind and light complementary calcium cycle thermochemical energy storage system multi-objective collaborative control method based on AI optimization, it is related to renewable energy storage technical field, the reversible carbonation reaction of calcium-based material (CaO / CaCO3) is used to realize the high-density storage and release of heat energy, the space-time prediction model of wind power, photovoltaic output is constructed by random forest algorithm, and the global optimization of system multi-objective is realized by combining improved particle swarm optimization algorithm.Compared with existing electrochemical energy storage and physical energy storage technology, the calcium cycle thermochemical energy storage of the application has the significant advantages of low energy storage cost, long energy storage time, long cycle life, abundant raw materials and the like.The results show that the annual power generation of the system after optimization reaches 223.67GWh, the cost of electricity per kilowatt-hour is reduced to 0.35 yuan / kWh, the annual carbon emission reduction is 167800 tons, and the investment recovery period is 7.34 years.The application provides an economical and efficient long-time energy storage solution for high-proportion renewable energy grid connection.

The application discloses a coupled inductor super-high gain DC-DC converter, a device and a control method, and belongs to the technical field of renewable energy storage grid connection, wherein the DC-DC converter integrates quadratic structure, switched capacitor, three-winding coupled inductor and voltage multiplication unit technology, realizes super-high voltage gain without relying on extreme duty cycle, and provides three degrees of freedom of flexibly adjustable output voltage; the coupled inductor super-high gain DC-DC conversion device comprises a voltage sampling sensor, a controller, a PWM signal generator and the DC-DC converter; the control method is applied to the DC-DC conversion device. In addition, while obtaining high voltage gain, the DC-DC converter can effectively reduce the voltage stress borne by the switch tube, and is suitable for occasions with high requirements for high voltage conversion performance in a renewable energy power generation system.

The application discloses a method for carbon dioxide hydrogenation driven by renewable energy, which comprises the following steps: a renewable energy power generation device generates power by using renewable energy; the generated electric energy is stored and used by a renewable energy storage device; carbon dioxide collected by a carbon dioxide collecting device and hydrogen obtained by electrolyzing water are introduced into a raw material buffer tank, mixed and then introduced into a micro-reactor hydrogenation device to perform carbon dioxide hydrogenation reaction; reaction products are separated by a three-phase separator to obtain product water as raw material for electrolyzing water; liquid products are introduced into a liquid hydrocarbon separation system to separate C5 + gasoline products; gas products are introduced into a gas separation system to separate unreacted carbon dioxide and hydrogen, lean dry gas, low-carbon olefins and liquefied gas; the unreacted carbon dioxide and hydrogen are recycled to the system.

The invention belongs to the field of chemical power sources, and particularly relates to a preparation process of a modified diaphragm for a lithium-sulfur battery based on amide group modified PIM-1. The modified diaphragm aims to solve the problems of poor cycling stability, low sulfur utilization rate and the like caused by a polysulfide shuttle effect in a lithium-sulfur battery. By introducing an amide group, the prepared modified polymer material has a confinement layer with a nanoscale aperture, migration of polysulfide can be effectively inhibited, and coulombic efficiency and cycling stability of the lithium-sulfur battery are remarkably improved. Compared with an existing commercial polyolefin diaphragm, the composite diaphragm has obvious advantages in electrochemical performance. Besides, the method is simple, convenient to operate, low in cost and suitable for large-scale production, has good durability and environmental friendliness, and promotes commercial application of the lithium-sulfur battery in the fields of electric automobiles and renewable energy storage.

The present application relates to the technical field of renewable energy storage, in particular to a method for estimating the volume of an underground artificial cavern of a compressed air energy storage power station, which comprises: inputting a determined initial volume of the artificial cavern into a pre-constructed energy storage capacity model to obtain a first power generation of an expander in the compressed air energy storage power station; if the absolute value of the difference between the first power generation and a preset power generation is less than a preset threshold, taking the initial volume as a target volume of the artificial cavern; otherwise, correcting the initial volume and inputting the corrected initial volume into the energy storage capacity model until the absolute value of the new difference is less than the preset threshold. Thus, the problem that the operation efficiency of the compressed air energy storage power station is affected due to the unsuitable volume of the artificial cavern is solved, and the target volume of the artificial cavern is determined through the energy storage capacity model of the compressed air energy storage power station and the pre-set rated power generation capacity, so as to improve the accuracy of the volume of the artificial cavern and ensure the operation efficiency of the compressed air energy storage power station.

The invention discloses a multi-structure coupled long-period soil heat storage device, and belongs to the technical field of renewable energy storage. The device comprises a cylindrical soil heat storage body, a short-term heat storage water tank, a high-temperature water distribution and collection system and a low-temperature water distribution and collection system. The soil heat storage body is divided into a central area, a middle ring area and a peripheral area in the radial direction, shallow-layer heat storage wells of a U-shaped pipe structure are arranged in the central area and the middle ring area, middle-deep-layer heat storage wells of a coaxial sleeve pipe structure are arranged in the peripheral area, and the layout with the dense inside and the sparse outside is formed. The high-temperature water distribution and collection system preferentially guides a high-temperature working medium into the heat storage wells in the central area and the peripheral area, and the low-temperature water distribution and collection system guides a low-temperature working medium into the heat storage wells in the middle annular area, so that a high-low-high temperature field gradient is actively constructed underground. According to the structure, the heat shielding effect is formed through the peripheral low-temperature area, the top face heat preservation plate is combined, radial and upward heat losses are effectively restrained, and the cross-seasonal heat storage efficiency is remarkably improved.

This invention discloses a high-hydrogen-density liquid organic hydrogen carrier and its applications, belonging to the field of hydrogen energy storage and utilization technology. The liquid organic hydrogen carrier is a composite system of a functionalized nitrogen-containing heterocyclic compound and a metal-organic framework material supported on a non-precious metal catalyst. The nitrogen-containing heterocyclic framework is connected with electron-donating and electron-withdrawing groups, constructing an intramolecular electron push-pull system. The non-precious metal catalyst is supported inside the pores or on the surface of the metal-organic framework material. Through molecular structure design and catalyst system optimization, this invention achieves a hydrogen storage density of not less than 7.0 wt%, a dehydrogenation onset temperature of not more than 150℃, and a dehydrogenated hydrogen purity of not less than 99.99%, with excellent cycle stability and low catalyst cost. This liquid organic hydrogen carrier can be widely used in renewable energy storage, long-distance hydrogen transportation, vehicle-mounted hydrogen sources, and distributed energy supply systems.

To provide a method for alkalizing or re-alkalizing an electrode active material. [Solution] A method for direct or indirect electrochemical alkalization of an alkali metal-deficient electrochemical active material is described. This method includes either an electrolytic step during the alkalization of the alkali metal-deficient electrochemical active material on an electrode current collector (direct), or during the regeneration of the reducing agent used for alkalization of the electrochemical active material (indirect). In another embodiment, the electrochemical cell or battery as defined herein is for use in portable devices such as mobile phones, cameras, tablets or laptops, electric or hybrid vehicles, or renewable energy storage.

A reservoir status data of an energy storage device is received, including a state of charge and a quantity or proportion of charge from renewable energy sources. A load data associated with a load is received. A carbon data associated with energy supplied to a load is received. The reservoir status data, load data, and carbon data are used to determine based at least in part on a carbon goal associated with the energy storage device an amount of energy to be discharged from the energy storage device to service the load. The determined amount of energy is dispatched from the energy storage device to service the load. The reservoir status data of the energy storage device is updated based on the amount of energy discharged from the storage device to service the load and the carbon goal.

The utility model discloses an energy storage battery monitoring device, an energy storage battery and a renewable energy storage system. The energy storage battery monitoring device comprises a data acquisition module, a processing module, a control module, a protection circuit and a storage module, the energy storage battery monitoring device acquires energy storage battery information such as carbon monoxide concentration, temperature, voltage and electrolyte concentration of a battery through a sensor in the data acquisition module, stores the information through the storage module, and processes the battery information through the processing module to obtain a safety strategy. And operation feedback is performed on safety suggestions through the control module and the protection circuit, so that omnibearing monitoring and anomaly detection of the running state of the battery are realized, and reliable guarantee is provided for long-life and high-efficiency application of the battery.

1. The name of the design product: liquid-cooled energy storage module. 2. The use of the design product: the design product is used for renewable energy storage system, industrial and household energy storage. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention discloses a data center multi-energy flow optimization control method, system, equipment and medium, and belongs to the technical field of power system energy storage equipment, and the method comprises the steps: collecting solar energy through a photoelectric thermal integrated module, and converting the solar energy into electric energy and heat energy; the electrolytic hydrogen production module is used for receiving electric energy of the photoelectric-thermal integrated module and converting the electric energy into hydrogen energy to be stored; when the electric energy of the photoelectric-thermal integrated module is insufficient, the fuel cell module consumes the stored hydrogen energy to generate power to supplement the load demand, and meanwhile, waste heat is generated; energy flow and power distribution among the photoelectric-thermal integrated module, the electrolytic hydrogen production module, the fuel cell module and the waste heat recovery module are controlled through the central control module. The system has the beneficial effects that a complete renewable energy storage and conversion chain is constructed by integrating the photoelectric-thermal integrated module, the electrolytic hydrogen production module and the fuel cell module, and the problem that the photovoltaic power generation volatility is not matched with the stable load requirement of the data center is effectively solved.

An indication of a target amount or percentage of renewable energy to be discharged per period from an energy storage device is received and stored. For each period in which energy is discharged from the energy storage device, electrical charge records reflecting a renewable or nonrenewable status of each slice or other tracked unit of charge stored in the energy storage device to discharge the target amount or percentage of renewable energy are used.

Reconfigurable power converter topologies that may switch between non-isolated Buck-Boost converter and isolated Dual-Active Bridge (DAB) converter or full-bridge converter. The switching may provide for reconfiguring the power converter inputs and outputs to series or parallel connections in accordance with design needs. The implementations of the disclosure may be utilized for electrified transportation renewable energy storage and power grid support.

AI-Enabled Multi-Source Hybrid Renewable Energy Storage device for Smart Electric Vehicle Charging Stations

A reservoir status data of an energy storage device is received, including a state of charge and a quantity or proportion of charge from renewable energy sources. A load data associated with a load is received. A carbon data associated with energy supplied to a load is received. The reservoir status data, load data, and carbon data are used to determine based at least in part on a carbon goal associated with the energy storage device an amount of energy to be discharged from the energy storage device to service the load. The determined amount of energy is dispatched from the energy storage device to service the load. The reservoir status data of the energy storage device is updated based on the amount of energy discharged from the storage device to service the load and the carbon goal.

The invention discloses a sulfur-doped coal-based porous carbon supercapacitor electrode material and a preparation method thereof, and belongs to the technical field of preparation of grade capacitors, and the preparation method of the sulfur-doped coal-based porous carbon supercapacitor electrode material comprises the following steps: taking low-rank coal as a precursor, and then successively carrying out thiourea doping, carbonization and KOH activation to obtain the sulfur-doped coal-based porous carbon supercapacitor electrode material. And preparing to obtain the sulfur-doped coal-based porous carbon supercapacitor electrode material. According to the invention, the Zhundong low-rank coal is used as a carbon source, and the obtained electrode material shows good electrochemical performance in a supercapacitor through a thiourea doping-high-temperature carbonization-KOH activation process, so that value-added conversion of the Zhundong low-rank coal from fuel to a high-value energy storage device is promoted; the method has the potential of being applied to the fields of new energy automobiles, renewable energy storage and the like.

The invention belongs to the technical field of composite phase change materials, and relates to a low-leakage expanded graphite / sugar alcohol composite phase change heat storage material and a preparation method thereof. The method comprises the following steps: firstly, carrying out surface oxidation modification on expanded graphite by adopting hydrogen peroxide, and then adding a sugar alcohol phase-change material, a water-soluble monomer with double bonds, an initiator, a cross-linking agent and the oxidation modified expanded graphite into deionized water in proportion for solution impregnation; in a water evaporation process, a cross-linked polymer network is formed in gaps of the expanded graphite through in-situ polymerization and cross-linking of a monomer and a cross-linking agent, and sugar alcohol molecules are effectively locked by active groups of the cross-linked polymer network. And finally, performing grinding and compression molding to obtain the composite phase change material. The method is simple and convenient in process, obviously enhances the encapsulation capability of the expanded graphite on sugar alcohol, and greatly reduces the leakage rate of the material after phase change melting. The obtained composite phase change material has low leakage rate and high heat-conducting property, and is suitable for the heat energy storage fields of renewable energy storage, industrial waste heat utilization and the like.

The invention provides a new energy heavy truck charging device and method for energy storage and peak regulation of road area renewable energy, and the device comprises a power transmission module which is used for providing power for a charging module; the energy storage module is used for storing the surplus power generated by the power transmission module and carrying out staggered power peak regulation; the charging module is used for providing a power battery charging service for the new energy heavy truck; the heat management module is used for dissipating heat for the power transmission module, the energy storage module and the charging module, recovering heat and transmitting the heat to the energy storage module for energy storage; and the device controller is used for receiving signals of the power transmission module, the energy storage module, the charging module and the heat management module and feeding back instructions to control the work of each module, so that the device works normally. According to the invention, the new energy heavy truck charging device meets the charging requirement, the load of the grid power direct supply infrastructure is reduced, the dependence on the grid power and the emission are reduced through the energy storage peak regulation of the road area renewable energy, and the system efficiency is improved.

The invention relates to a renewable energy source energy storage technology, and particularly discloses an underwater compressed air energy storage system site selection evaluation method, which comprises the steps of S1, establishing a multi-level dynamic coupling site selection evaluation framework; s2, carrying out candidate region preliminary screening and data acquisition quantification, obtaining candidate regions, and establishing an evaluation matrix for indexes of the candidate regions to obtain a standardized evaluation matrix; s3, performing dynamic simulation and trend analysis; obtaining an offshore wind power-UWCAES coupling efficiency factor of each point in the candidate area; and S4, an entropy weight method is adopted to automatically distribute objective weights of the indexes according to the data dispersion degree, then the importance order of the indexes of all levels is calculated according to an improved fuzzy analytic hierarchy process, subjective weights are obtained, finally, comprehensive weights are calculated according to a dynamic weight distribution rule, and all site selection schemes are scored. The method has the advantages that the comprehensive evaluation of dimensions and the dynamic evaluation of time scales are realized, and the evaluation result is more scientific, foresight and high in decision support value.

The invention discloses a coupling inductor ultrahigh-gain DC-DC converter, a device and a control method, and belongs to the technical field of renewable energy storage grid connection, the DC-DC converter integrates a quadratic structure, a switched capacitor, a three-winding coupling inductor and a voltage-multiplying unit technology, ultrahigh voltage gain is realized without depending on an extreme duty ratio condition, and the DC-DC converter can be applied to the field of energy storage and grid connection of renewable energy sources. Three degrees of freedom capable of flexibly adjusting the output voltage are provided; the coupling inductor ultrahigh gain DC-DC conversion device comprises a voltage sampling sensor, a controller, a PWM signal generator and the DC-DC converter. The control method is applied to the DC-DC conversion device. Besides, the DC-DC converter can effectively reduce the voltage stress borne by the switching tube while obtaining high voltage gain, and is suitable for occasions where a renewable energy power generation system has high requirements on high voltage conversion performance.

The invention provides a self-sacrifice carbon electrode based on waste biomass, a preparation method of the self-sacrifice carbon electrode and application of the self-sacrifice carbon electrode in a water electrolysis hydrogen production system, and belongs to the technical field of biomass resource utilization. The preparation method comprises the following steps: firstly carrying out material pretreatment on a waste biomass raw material, then carrying out tabletting forming treatment, and finally carrying out high-temperature carbonization treatment in an inert atmosphere, so as to prepare the carbon electrode with self-sacrifice and self-support characteristics; and putting the carbon electrode serving as an anode and a platinum sheet cathode into an electrolytic bath, and immersing into electrolyte to carry out auxiliary water electrolysis for hydrogen production. The hydrogen production energy consumption of the electrode under the current density of 500mA / cm < 2 > is less than or equal to 4.3 kWh / Nm < 3 >, the carbon conversion rate is greater than or equal to 85%, and the mass loss rate of the electrode after continuous operation for 120 hours is less than 15%. According to the invention, effective combination of high-value utilization of biomass wastes and a clean hydrogen production process is realized, and an innovative solution is provided for renewable energy storage.

The invention relates to a cascaded DC / DC converter topological structure based on full-bridge LLC, and belongs to the technical field of power electronic converters. In order to solve the problems of limited gain adjustment and large output ripples under the condition of soft switching of an LLC converter in a renewable energy storage system, a cascade structure of a full-bridge LLC isolation stage and an interleaved Buck / Boost regulation stage is adopted. The isolation stage performs voltage division and loss reduction through a double-magnetic-core series transformer, and the regulation stage controls and suppresses ripples through interleaving parallel connection; the LLC stage works in a quasi-resonance mode to realize soft switching, and the regulating stage regulates voltage gain through a duty ratio. The technical effects are as follows: the input is 300-400V, the output is 24-60V, the power is 1-5kW, the efficiency is greater than 95%, the ripple is less than 1.5%, the problems of overheat, high ripple and insufficient gain of the transformer in the traditional scheme are solved, and the transformer is suitable for a photovoltaic / energy storage system.