Power in Flux

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Type: Posts; User: Spoonman

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  1. You referring to the stock units that come in the...

    You referring to the stock units that come in the leaf packs?

    Haven't actually considered using them as I haven't even looked into their characteristics - I was just thinking more along the lines...
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    oh for a woman who cleans the machines - mine...

    oh for a woman who cleans the machines - mine keeps the house shining like a new pin, but the car? ...it's a skip on wheels!!
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    As Frodus says, top balance is best even if for...

    As Frodus says, top balance is best even if for no other reason than you're at the top of the pack far more regularly than you're at the bottom which makes the whole lot far easier to monitor.
    Set...
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    72V x 600A = 42kW?!!? Damn that thing is gonna...

    72V x 600A = 42kW?!!?

    Damn that thing is gonna be handful! :O

    Can't wait to see the look on any 2T kart pilots face when they mash the throttle on that thing! :D
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    I've considered the Suzi v-twin chassis in the...

    I've considered the Suzi v-twin chassis in the past - they're very narrow between the spars though (even the TL's) which limits your options for battery configuration.
    That being said, the DL is...
  6. As have I been for a long while now - and I...

    As have I been for a long while now - and I absolutely agree, it's well worth studying.



    This is an excellent reference case, and I'd be curious to know if that data comes from cylindrical or...
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    The last two lines in that confused the hell out...

    The last two lines in that confused the hell out of me, but I got what you were saying in the end - yes. (I think ;) )



    Actually no, academically at least. In series they'd be absolutely fine...
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    I dunno - the GSX-V is a cracker, but it's...

    I dunno - the GSX-V is a cracker, but it's burdened by the fact that is was a learning project.

    Blank slate project will, with no doubt whatsoever, cost a hulluvalot more to get done, but what you...
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    No bother dude - I'm just still a little...

    No bother dude - I'm just still a little concerned that you're going to learn visually just how badly things can go wrong when you're dealing with high power batteries.
    You've got to remember that...
  10. I understand your concern and academically you're...

    I understand your concern and academically you're correct, however herein lies the reason for my assertion.

    The hot and cold temperature effects you're alluding to are *heavily* coupled with the...
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    Range aside, that configuration would be...

    Range aside, that configuration would be mah000sively popular throughout mainland europe as an alternative to standard scooters.
    In fact even with the limited range it may well still be plenty. I...
  12. Not much of a concern where leaf modules are...

    Not much of a concern where leaf modules are involved - if you're using 18650's then depending on the discharge 'C' rate, some consideration would be advisable alright.
    It's a point I've been...
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    Nope dude, you're still arranging cells...

    Nope dude, you're still arranging cells back-2-back here. Sum voltage will be zero.

    You need, in the parallels, to tie BOTH poles together - in effect creating ONE battery.
    THEN you wire that...
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    :O WOW! Dude I'm very glad you came on here,...

    :O WOW!

    Dude I'm very glad you came on here, and I hope you've done so before you attempted anything like what you've drawn.
    I reckon some serious 'book time' would be a very wise investment...
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    Assuming you wire in parallel first, and then put...

    Assuming you wire in parallel first, and then put those parallel arrangements in series, then you only have to monitor the series components - the parallels behave as one cell. So whether your pack...
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    Mega jealous at the easy access to 18650 cells -...

    Mega jealous at the easy access to 18650 cells - they pack a mean punch.
    Lot of work putting them together, and you'll have to keep a good mind to heat shedding, but absolutely the most energy and...
  17. Thread: Need Advice

    by Spoonman
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    Just buy a full face lid with a pin-lock visor...

    Just buy a full face lid with a pin-lock visor and be done with it. Only way to go, no more fogging regardless what the weather.
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    Before you go to all the hassle, see if you can...

    Before you go to all the hassle, see if you can track down a Vectrix VX-1.
    Battery will most likely be shot unless it's already been refit - but the latter task would be the job you'd be aiming to...
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    Current == Crank Torque Voltage == Crank RPM ...

    Current == Crank Torque
    Voltage == Crank RPM

    High voltage means lower currents for any given power level, which means less heating and better efficiency; it also means higher RPM so shorter...
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    I did a feasibility sheet on this for another lad...

    I did a feasibility sheet on this for another lad asking the same question on here a good while back - as above, not a runner even for 1/4mile sort of energy stores. Way too big.
    Even as ballast to...
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    They're super stable modules so a periodic manual...

    They're super stable modules so a periodic manual balancing effort would be sufficient.
    That being said if you want something more autonomous then it's really down to how much you want to spend. ...
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    What's the full spec on that AC-30 frodus? -...

    What's the full spec on that AC-30 frodus? - can't see anything referencing it directly on their website.
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    That link isn't working Frodus - the text is...

    That link isn't working Frodus - the text is shortened in the actual URL, not just the onscreen link.

    edit: found it here:...
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    Welcome aboard dude - I'm a leaf owner myself as...

    Welcome aboard dude - I'm a leaf owner myself as well, wouldn't go back.
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    AQ above is correct, if you try to solder the...

    AQ above is correct, if you try to solder the cells directly you will do them damage - if your cells aren't tabbed then you'll need to make, acquire or otherwise gain access to a tab welder. ...
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