Re: Electric for large Planes

Ed Cregger wrote:
> "Jim" <jim@[EMAIL PROTECTED]
> wrote in message
news:Il4mk.306$T91.33@[EMAIL PROTECTED]
>> You use a charger that will handle the charge rate for the total mah of

>> the pack. So if it's a 3S (11.1V) and two 2200mah packs in parallel,
then 
>> you charge it at the rate for 4400mAh.  A charge rate of 1C is 4.4amps.
>>
>> "Morgans" <jsmorgan@[EMAIL PROTECTED]
> wrote in message 
>> news:g7a5ds$l67$2@[EMAIL PROTECTED]
>>>
>>>> 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.
>>> I have never used a pack like that.  I would think they would have to 
>>> have a plug that you could take apart and charge it as a 6s, or use 
>>> individual leads like on a balancing charger.
>>> -- 
>>> Jim in NC
> 
> 
> ------------
> 
> The reason I ask is because charging parallel Nicad packs is not
considered 
> good practice. The LiPoly packs must have very low and consistent
internal 
> impedances if they can withstand charging in parallel constantly.
> 

Not quite, but close. They have a consistent internal impedance, but 
most im****tantly, the voltage rises with charge state unlike nickels, 
where it FALLS at the peak charge (delta peak)

This means they naturally self balance when cells are in parallel.

> Ed Cregger 
> 
>