Transcript Using__LiFepo4__Lithium_Iron_Phosphate_Batteries

Using (LiFepo4) Lithium
Iron Phosphate Batteries
in Aviation
Engine Starting
Batteries
Destructive Testing
Why is LiFePo4 safe ?
Impedance Values .. 19 mohms
10.5mohms
Low Impedance .. 10.8 mohms
SLA discharge curve low C-rate
Lithium discharge curves, hi C rate
Energy Densities
Watthours / kg – Watthrs / Liter
Rogone plot - energy storage
Energy Release / chemistry type
Exothermic volatilty
Lithium cells - LiFePO4
Lithium can safety valve
See-thru clear case design
BMS
Balancing circuit
Balancer circuit
Charge display
Low V alarm , LVC circuit
ADVANTAGES
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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
Current users; Turbine
PT6-20 in Lancair IV
PT6 start - peak A draw, V drop
PT6 300A generator
Turbine Start Data, Lithium 18lbs
Charging Data > start
Piston; IO550 , Lithium 4 lbs
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REFERENCES
Dynalab
A123
Battery university
Electropedia
Phostech
Ti
Wikipedia
MIT
Goodenough UT
Aleees
Sandia Labs