Method and apparatus for storing energy

Patent metadata

Field	Value
Publication number	US-9570910-B2
Application number	US-201615137943-A
Country	US
Kind code	B2
Filing date	Apr 25, 2016
Priority date	Feb 6, 2012
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

An energy storage apparatus for storing energy transmitted by a power transmission line includes an elastically deformable component and an actuator-generator. The actuator-generator is coupled to the elastically deformable component such that both mechanical and electrical actuation of the actuator-generator causes a generation of electrical energy by the actuator-generator via a release of tension in the elastically deformable component.

First claim

What is claimed is:

1. An energy storage apparatus comprising:
an elastically deformable component including a cable; and
an actuator-generator coupled to the elastically deformable component such that both mechanical and electrical actuation of the actuator-generator causes a generation of electrical energy by the actuator-generator via a release of tension in the elastically deformable component.

2. The energy storage apparatus of claim 1 , wherein electrical actuation of the actuator-generator generates tension in the elastically deformable component, and wherein mechanical actuation of the actuator-generator releases the tension to cause a generation of electrical energy by the actuator-generator.

3. The energy storage apparatus of claim 1 , wherein the actuator-generator includes at least one of an electro-hydraulic component, an electromechanical component, an electromagnetic component, or an electro-fluidic component.

4. The energy storage apparatus of claim 1 , wherein the cable has a resonance frequency corresponding to a harmonic of the primary frequency.

5. The energy storage apparatus of claim 1 , wherein actuator-generator is coupled to the cable at a point on the cable disposed between a first end of the cable and a second end of the cable.

6. The energy storage apparatus of claim 1 , wherein the actuator-generator is coupled to two ends of the cable.

7. The energy storage apparatus of claim 1 , wherein the cable is configured in a linear orientation.

8. The energy storage apparatus of claim 1 , wherein the actuator-generator is coupled to the elastically deformable component, such that electrical actuation of the actuator-generator generates torsional tension in the elastically deformable component.

9. The energy storage apparatus of claim 1 , wherein the actuator-generator is coupled to the elastically deformable component, such that electrical actuation of the actuator-generator generates linear tension in the elastically deformable component.

10. The energy storage apparatus of claim 1 , wherein the actuator-generator includes at least one of a brake, a releasable ratchet, or a movable pin actuatable to maintain the tension in the elastically deformable component.

11. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure a force applied by the actuator-generator to generate the tension in the elastically deformable component.

12. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure a torque applied by the actuator-generator to induce the tension in the elastically deformable component.

13. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure the tension in the elastically deformable component.

14. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure stress in the elastically deformable component.

15. The energy storage apparatus of claim 1 , further comprising a strain gauge coupled to the elastically deformable component for measuring strain in the elastically deformable component.

16. The energy storage apparatus of claim 15 , wherein the strain gauge measures linear strain in the elastically deformable component.

17. The energy storage apparatus of claim 15 , wherein the strain gauge measures shear strain in the elastically deformable component.

18. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure an energy storage quantity.

19. The energy storage apparatus of claim 1 , further comprising at least one sensor coupled to at least one of the elastically deformable component or the actuator-generator, the at least one sensor configured to measure cumulative energy storage.

20. The energy storage apparatus of claim 1 , wherein the actuator-generator is coupled to the elastically deformable component such that electrically actuating the actuator-generator causes application of a transverse force to the elastically deformable component.

21. The energy storage apparatus of claim 1 , wherein the cable includes a non-rotating cable.

22. The energy storage apparatus of claim 1 , wherein the cable includes a monolithic cable.

23. The energy storage apparatus of claim 1 , wherein the cable includes a stranded cable.

24. The energy storage apparatus of claim 1 , wherein the cable includes a straight stranded cable.

25. The energy storage apparatus of claim 1 , wherein the cable includes a twisted stranded cable.

26. The energy storage apparatus of claim 1 , wherein the cable includes a circular cross-section.

27. The energy storage apparatus of claim 1 , wherein the cable includes a rectangular cross-section.

28. The energy storage apparatus of claim 1 , wherein the cable includes a ribbon-like cross section.

29. The energy storage apparatus of claim 1 , wherein the cable includes a hanging cable.

30. The energy storage apparatus of claim 29 , further comprising weights coupled to the hanging cable.

31. The energy storage apparatus of claim 1 , further comprising a controller coupled to the actuator-generator, the controller configured to modulate electrical energy consumption and generation of the actuator-generator.

32. The energy storage apparatus of claim 31 wherein the controller is configured to modulate electrical energy consumption and generation at rates greater than or equal to a primary frequency of the power source.

33. An energy storage apparatus comprising:
an elastically deformable component; and
an actuator-generator configured for coupling to a power source, the actuator-generator coupled to an end of the elastically deformable component such that a first actuation of the actuator-generator generates tension in the elastically deformable component, and a second actuation of the actuator-generator causes a generation of electrical energy by the actuator-generator via a release of tension in the elastically deformable component.

34. An energy storage apparatus comprising:
an elastically deformable component; and
an actuator-generator configured for coupling to a power source, the actuator-generator coupled to the elastically deformable component such that both mechanical and electrical actuation of the actuator-generator causes a generation of electrical energy by the actuator-generator via a release of tension in the elastically deformable component, wherein the actuator generator includes a linear motor.

35. An energy storage apparatus comprising:
an elastically deformable component; and
an actuator-generator coupled to the elastically deformable component such that actuation of the

Assignees

• Elwha Llc

Inventors

• Chan Alistair K
• Deane Geoffrey F
• Fyke Aaron
• Gross William
• Hyde Roderick A
• Jung Edward K Y
• Kare Jordin T
• Myhrvold Nathan P
• Tegreene Clarence T
• Wood Jr Lowell L

Classifications

• H02J15/30

  using storage of inertial or mechanical energy, e.g. using flywheels · CPC title

• H02K33/02

  with armatures moved one way by energisation of a single coil system and returned by mechanical force, e.g. by springs · CPC title

• F03G1/00

  Spring motors (spring-driven toys A63H; springs in general F16F; precision time mechanisms, e.g. for clocks or watches, G04B) · CPC title

• H02P9/10

  Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load · CPC title

• H02K7/18

  Structural association of electric generators with mechanical driving motors, e.g. with turbines · CPC title