Large-scale energy storage method based on electricity-aluminium-hydrogen circulating system

• Main Authors: HE YEGUANG, SUN YANG, LI RUNDONG, YANG TIANHUA
• Format: Patent
• Language: Chinese; English
• Published: 31.08.2011
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE

The invention relates to a large-scale energy storage method based on an electricity-aluminium-hydrogen circulating system. The method comprises the steps of: connecting an electrolytic aluminium device to an output line in a power station; converting redundant electric energy into aluminium powder by the electrolytic aluminium device; plunging a mineral association formed by mixing the aluminiumpowder and fly ash of a power plant into an aluminium water reaction device to prepare hydrogen; and converting the hydrogen into electric energy by hydrogen fuel cells. Aluminium oxide which is obtained by the reaction of the aluminium powder and water can be used as raw materials of the electrolytic aluminium device, thereby the aluminium oxide is recycled. The invention has the advantages of cleanness, high efficiency, no limitation of regions and resources, flexible way of energy storage and easy control; and defects of hydrogen storage and transportation difficulty are effectively overcome.