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Advancements in Aviation Power: LiFePO4 Lithium Iron Phosphate Batteries for Engine Start

Discover the benefits of using LiFePO4 Lithium Iron Phosphate batteries in aviation engine starting systems. This article explores the safety features, including low impedance values and innovative design elements. Learn about the advantages of LiFePO4 such as reduced weight, compact size, long cycle life, and low self-discharge rates compared to traditional lead-acid batteries. We also delve into the chemistry of lithium cells, energy densities, and maintenance-free operation. Join the shift to a more efficient, environmentally friendly power source in aviation.

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Advancements in Aviation Power: LiFePO4 Lithium Iron Phosphate Batteries for Engine Start

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Presentation Transcript

  1. Using (LiFepo4) Lithium Iron Phosphate Batteries in Aviation Engine Starting Batteries

  2. Destructive Testing

  3. Why is LiFePo4 safe ?

  4. Impedance Values .. 19 mohms

  5. 10.5mohms

  6. Low Impedance .. 10.8 mohms

  7. SLA discharge curve low C-rate

  8. Lithium discharge curves, hi C rate

  9. Energy Densities

  10. Watthours / kg – Watthrs / Liter

  11. Rogone plot - energy storage

  12. Energy Release / chemistry type Exothermic volatilty

  13. Lithium cells - LiFePO4

  14. Lithium can safety valve

  15. See-thru clear case design

  16. BMS

  17. Balancing circuit

  18. Balancer circuit

  19. Charge display

  20. Low V alarm , LVC circuit

  21. ADVANTAGES • Much less weight • Smaller size • Flatter discharge curve • Very low self discharge rate • Very long cycle life • Deep cycle ability • No maintenance needed • Cheaper than lead acid in the long run • Environmentally friendly

  22. Current users; Turbine

  23. PT6-20 in Lancair IV

  24. PT6 start - peak A draw, V drop

  25. PT6 300A generator

  26. Turbine Start Data, Lithium 18lbs

  27. Charging Data > start

  28. Piston; IO550 , Lithium 4 lbs

  29. REFERENCES • Dynalab Wikipedia • A123 MIT • Battery university Goodenough UT • ElectropediaAleees • Phostech Ti Sandia Labs

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