Re: Electric for large Planes

Right on the money!

"Ed Cregger" <ecregger@[EMAIL PROTECTED]
> wrote in message 
news:g7ank5$k8j$1@[EMAIL PROTECTED]
>
> "Bob Cowell" <bobc@[EMAIL PROTECTED]
> wrote in message 
> news:1t5h94p6bikcr70h798ulea2nln6tqdc22@[EMAIL PROTECTED]
>> 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
>
> --------------
>
> That makes perfect sense. Thanks.
>
> Ed Cregger
>