
[0001] Gravity energy storage system based on a truss tower structure that includes a ballast block storage zone in its upper section, a ground-to-height and height-to-ground ballast block transfer system and an energy con-version system that uses the concept of kinetic energy generation to drive electrical power generation equip-ment that is connected to the power transmission and conversion system to be used in the public grid or directly consumed by receivers or to be stored in lithium-ion bat-teries. [pdf]

This invention relates to flywheel energy storage systems, to integration of advanced-technology fiber-reinforced composite thick-ring flywheels, low-cost continuous-filament unbonded steel wire and other filament flywheels and mounting hub designs, with ultra-compact and in some cases low-cost conventional motor/generators and digital signal processing-based electronic controller systems, fail-safe vacuum enclosures, emergency energy-dump and containment systems and ball, roller and sleeve bearings having solid lubricants, all of which can operate reliably for many years without maintenance. [pdf]
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