Patent ID: 9673682
Date: 2017-06-06
CPC Classifications: H02K

Claim:
1. An energy storage system comprising: at least one stationary vertical structure including a horizontal support base, at least one vertical rail perpendicularly attached to said horizontal support base and a horizontal component mounting structure attached perpendicularly to the top of said vertical structure; at least one cable winding drum or spool device located on top of said vertical structure; at least one electric motor electrically connected to an electrical energy supply source and rotationally connected to said cable winding drum or spool device; at least one movable enclosure placed inside said vertical structure; wherein said at least one movable enclosure comprises: at least one cable wrapping drum located on top of said movable enclosure; at least one hydraulic pump in fluid communication with said at least one low pressure fluid reservoir and said at least one high pressure fluid accumulator and rotationally connected to said at least one cable wrapping drum; and at least one flexible connective means including at least one of a cable, a wire, a rope, a belt and a chain rotationally connected to said at least one cable winding drum or spool device and to said at least one cable wrapping drum; wherein, in operation, said at least one electric motor rotates said at least one cable winding drum or spool device which draws on said at least one flexible connective means while lifting said at least one moveable enclosure, wherein lifting said at least one moveable enclosure rotates said at least one cable wrapping drum and thus rotates said at least one hydraulic pump, transferring hydraulic fluid from said at least one low pressure fluid reservoir to said at least one high pressure fluid accumulator; wherein, when said at least one moveable enclosure reaches the top of said at least one vertical structure, said electrical energy supply source is disconnected from said at least one electric motor and said at least one moveable enclosure begins to fall, wherein during descent said at least one hydraulic pump continues to transfer hydraulic fluid from said at least one low pressure fluid reservoir to said at least one high pressure fluid accumulator, wherein, when a load is detected, pressurized fluid from said at least one high pressure fluid accumulator is discharged to said at least one hydraulic motor and returned to said at least one low pressure fluid reservoir, wherein rotation of said at least one hydraulic motor rotates said at least one electrical generator to provide a current of electricity.