Re: Electric for large Planes

On Tue, 5 Aug 2008 12:08:28 -0400, "Ed Cregger" <ecregger@[EMAIL PROTECTED]
>
wrote:

>-----------
>
>All right, I'm cornfused.
>
>How do you charge a system like that, Jim? Do you unhook the parallel
packs 
>and charge them with separate chargers? With Nicads that wouldn't be a
good 
>idea.
>
>Ed Cregger

I'm not Jim,  but I'll take a whack at this one

On the original LiPoly assembled packs,  we just plugged them in and
charged
them,  series, parallel,  no problem.
BUT
there were problems, 
eventually the cell voltages (state of charge) drifted enough that a cell
might
be ruined by over voltage or under voltage conditions even though the pack
as an
assembly seemed to be ok

 so most if not all of the newer packs come with two sets of leads
attached,
One set is the power leads.

the other set is attached so that there is a separate path for each
individual
cell.
this set is used either for charging or balancing the pack (depending on
your
charging / balancing equipment)

There,  THAT ought to muddy the waters some ;-)

bob