lightweight batteries

Discussion in 'Instruments / Avionics / Electrical System' started by battman, Oct 18, 2010.

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  1. Oct 18, 2010 #1

    battman

    battman

    battman

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    I am curious what battery size people are using, and the weight of such.
    Reason; would a battery weighing 1 1/2 to 3 lbs. be of interest ???

    I am looking for testers on different aircraft - especially rotorcraft- to show reliability and improved performance.
    ( deposit refundable when returned )

    Andy
    lithiumMoto
     

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  2. Oct 18, 2010 #2

    TFF

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    How many amps does it have? The iron lithium batteries are pretty cool compared to the burn hazard of LiPo. Does the battery come with a balance charger?
     
  3. Oct 18, 2010 #3

    battman

    battman

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    amps are variable depending on what your starter needs
    no charger needed
     
  4. Oct 19, 2010 #4

    Robby

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    'amps are variable depending on what your starter needs' ??!!??

    Of course they are, but that's like saying the circuit only pulls what it needs !!!

    I can put 8 D-cells together and get 12V but it sure won't spin a starter because there isn't enough amps !!

    Are you saying the amps are variable depending on the size of the battery used ??
    If so, fine, but what is the max amperage output of the various
    batteries ?
    If there is only the one size, then what is its max amperage
    output ??
     
  5. Oct 19, 2010 #5

    battman

    battman

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    I can put together a 200A, 300A, 400A, 500A, etc.... pack
    unless u want the xtra capacity beyond what the starter requires....
    It's a choice u have.
     
  6. Oct 19, 2010 #6

    Robby

    Robby

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    Ah, that's better - Thank You
     
  7. Oct 22, 2010 #7

    millerperf

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    whats the price warranty!12v 24v ?will it recharge with alternator?will it start my turbine allision t63-720 or is it just go for small engine i might try one on my new 150fi yamaha engine thanks mark
     
  8. Apr 21, 2011 #8

    battman

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    Last edited: Apr 23, 2011
  9. Mar 19, 2017 #9

    Daleandee

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  10. Mar 20, 2017 #10

    cluttonfred

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    Any idea exactly what technology those Aerovoltz batteries use? I checked their site but could not find anything more specific than "lithium." My understanding is that the newer technology lithium iron phosphate (LiFePO 4) batteries are much less likely to have this sort of runaway reaction.
     
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  11. Mar 20, 2017 #11

    Xanadrone

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    Yes, the latest LiFePo4 technology already allows a good "energetic density" at more abordable prices than the Li-Ion ones and without the risk of firecrackers - ex:
    https://www.ev-power.eu/LiFePO4-special-cells/Lithium-Iron-LiFePO4-Battery-Cell-LFP-3-2V-72AH.html

    That means 0,230 kWh for 1.75 kg weight and 90 USD (without taxes) - say 4 lbs per unit including connectors.
    Practically speaking, for an [ultra]light E-experimental plane, a pack of 15 would assure 3,5 kWh at 48V (13S for RC-freaks ;) ) and a max. discharge rate of 360 amps (5C), weighting 27 kgs (60 lbs) and for "just" about 1.5K USD.

    Two such packs (7 kWh, 54kgs/120lbs) methinks would be just fine for a small one place E-bimotor to fly one hour at 50-60% power - and even double for a glider-style aircraft with good L/D.
    An unlimited number of other combinations would certainly be possible for those unhappy with just 14-15 kW onboard (18-20 HP), such as the use of only one pack for take-off E-power boost and/or emergency use, along with a small IC engine for the level flight. Or other hybrid/small generator solutions etc. etc.

    Btw, the favourable evolution of battery tech seems to be accelerating, and this made me not only sketch, but also calculate a few versions of some viable, simple and most of all affordable E-microlight. One without cross-country attributes for sure (for the time being at least), but perfect for cheapo leisure flights because the +2,000 recharge cycles of the new LiFePo4's would compensate rapidly the batteries cost.

    So, I'll be back soon with the final version (3-views + performance estimations) for your precious aid - meaning constructive criticism, with or without 437 posts about some wrong angle of the winglets - luckilly it doesn't have any. :gig:
     
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