1 / 24

Development of the Mechanical Battery

Development of the Mechanical Battery. Texas A&M University – Kingsville Javier Lozano – MEEN Senior Luis Muratalla – MEEN Junior Eli Hatfield – EEEN Sophomore Gary Garcia – MEEN Freshman Richard Rivera – MEEN Freshman Jonathan Boehm – CEEN Freshman Faculty Advisor – Dr. Larry Peel.

brit
Download Presentation

Development of the Mechanical Battery

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Development of the Mechanical Battery Texas A&M University – Kingsville Javier Lozano – MEEN Senior Luis Muratalla – MEEN Junior Eli Hatfield – EEEN Sophomore Gary Garcia – MEEN Freshman Richard Rivera – MEEN Freshman Jonathan Boehm – CEEN Freshman Faculty Advisor – Dr. Larry Peel

  2. Project Background • Design a safe, efficient mechanical battery that stores energy in a mechanical form, for use on the space station. • Energy will be stored into Fiber Reinforced Elastomer composites. • Rechargeable and portable form of energy storage.

  3. Design Objectives • Battery must be lightweight, compact • Must be free of hazardous chemicals and toxic materials • Have an energy density near or above that of an electrochemical battery • Must be rechargeable electrically and manually • Mechanically stored energy with an electrical energy output • Prevent overcharging and battery failure

  4. Semester Objective • Complete the frame • Complete Design layout • Create solid models • Brake • Clutch • Bearings • Meet Deadlines • College Station Presentation • End of Semester report • Produce Deliverables • Semester Presentation • Report to NASA mentors • Report to College Station

  5. The team went from a smaller battery to a larger battery Easier Fabrication Higher energy density From having the strips in torsion to tension Analyzed composite strips to compare between circular torsion, rectangular torsion, and rectangular tension Initial dimensions .4” x .8” x 13” in torsion Optimal Fiber Orientation for best combination of elasticity and stiffness. Project History

  6. Current Design

  7. Current Work • Incorporation of Brake into the system • Attempt to alter motor to strip gear ratio • Structural Analysis • Frames • Mounting plates • Further Analysis on Composite Strips • Test all components of the electrical portion

  8. Gearing System • Engagement arm • Engagement gear on end allows engagement of either motor or generator • Gear Ratio Information • 2:1 Ratio from Motor to shaft • 0.25:1 Ratio from Shaft to Generator • Clustered Design • Motor Gear • Generator Gear • Composite strip gear • Intermediate gear • Engagement gear Motor Gear Composite Shaft Gear Engagement Gear Generator Gear Intermediate Gear Engagement Arm

  9. Braking System • Electromagnetic Brake • Use Mechanism to stop and lock Composite Strips in the stretched position • Clutch • Use electromagnetic brake as clutch • Benefits • Single Unit • Less Controllers • Lighter

  10. Composite Strip Design • Strip dimensions 2.25” x .1” x 15” • IM7 Carbon fibers with a polyurethane RP 6442/fr 1040 matrix • Ply angles tested +/-45, +/-60 or +/-75 • Elements able to stretch 150% • A time delay between stretching and releasing causes energy loss.

  11. Energy Data

  12. Energy Loss Data Both Started at 100%

  13. External Frame • An aluminum frame covered by a composite skin • Current dimensions • 24” x 14” x 8” • Aluminum angle frame • Thickness of 1/8” • 1” x 1” leg length • Frame adds mounting capability • Composite Skin provides stiffness, strength and safety

  14. Building The Frame • Bolt Vs. Weld • Vibration • Strength • Re-buildable • Bracket Design • Frame Corners • Eliminate Offset • Better Fit

  15. Internal Mounting Fixture • Provides mounting surface to attach parts • Provides extra support • Provides mounting of “rollers” for the strips to fully stretch more easily • Separates gear train from internal parts

  16. Completed Solid Model

  17. Energy Conversion Purpose Convert elastic potential energy to kinetic energy, to electrical energy and vice versa Components Electric Motor Generator Clutch Brake

  18. Power Generation 12 VDC, 20 amp output Charge Batteries Power 12 volt DC equipment

  19. Re-charge System Recharging Easy recharges mechanical battery (Stretches composite strips) Operate at 120 VAC or 24VDC Motor Specifications 24 VDC 1/3 HP 11.7 in lbs Torque Problems Weight and size Rotational speed

  20. Current Schedule

  21. Work To Come • Possibly revise electrical portion • Finish Building the System • Finish Building Frame • Install internal components • Incorporate Electrical Portion • Test and Analyze results • Attempt to Refine Design

  22. Conclusion • The fabrication of the frame is almost complete • The team decided to weld parts of the frame vs. bolting • Completion of gear analysis excel program • 2:1 Ratio from motor to composite strip shaft • 0.25:1 Ratio from composite strip shaft to generator • Material relaxation is an issue with the strips • Likely will have much lower energy density than expected in battery. • Battery is best suited for high intensity low duration energy output.

  23. Special Thanks • Space Engineering Institute • Magda Lagoudas • Dr. Judith Jeevarajan • Dr. Larry Peel • Mr. Dustin Grant • NASA (Prime Grant No. NCC9-150) • TEES (Project No. 32566-681C3) • Texas A&M University – Kingsville • TAMUK staff and faculty

  24. Any Questions?

More Related