[NSRCA-discussion] TP 53005SPL2

[Chad Northeast]

As a 10s pack yes,

I don't understand why you would want another balance tap for a parallel 
cell?  The voltage of that set of parallel cells cannot be made 
different, those two cells are always identical in voltage, and 
therefore always balanced.  To the charger the pack is 1P. 

The 2600 cells will always be scarce since its probably one of the most 
popular sizes in lipo's today for 3s parkflyers and 450 class helis.  
This was the same when the first gen 5300 prolites were constructed of 
1320's.  The demand from sportflyers for that size of packs stripped 
supply away from making the 5300 packs back then.

Chad

Bill's Email wrote:
> Yep, I was talking about a full 10S in the plane. Two 5S2P packs in 
> series, did not make that very clear did I?? 10 cells per pack, 20 
> cells total on board.
>
> I spoke with a pretty large reseller of TP products and he is the one 
> who told me that TP is not warm and fuzzy on this pack. He said they 
> have warranty concerns. Frankly I wish there was a separate balance 
> tap for each of the 5S packs in each one. As it is you are balancing 
> cells in parallel, not the best method.
>
> The 2600 cells that they make these up from are very scarce right now 
> and on backorder for TP. I've been waiting about a month for the two 
> packs I just got.
>
>
>
>
> Chad Northeast wrote:
>> Bill
>> That is not correct, there are only 10 cells in those packs, made of 
>> 2600 PL2 cells.  Essentially two 5s 2600 packs in parallel.
>>
>> I have a hard time believing that TP will stop making this pack, they 
>> have made far more complicated packs in the past.  These packs are 
>> made to order which makes them usually not a stock item.  I will 
>> confirm this with TP though.  They have been around for nearly a year 
>> now (I am still flying the first two of 4 sets produced), so I don't 
>> see why they would stop now.
>>
>> Chad
>>
>> Bill's Email wrote:
>>>>
>>>> ------------------------------------------------------------------------ 
>>>>
>>> It is in fact a 5S2P arrangement. Two 5S 2600 mAh packs in parallel 
>>> plus two other packs in parallel and those two in series with each 
>>> other.  A total of 4 5S packs in there. THis is why this pack 
>>> performs so well under load. Each of the two parallel packs in each 
>>> set only sees half the load and consequently it has less voltage 
>>> drop under load.
>>>
>>> TP does not like making this arrangement and I understand that they 
>>> may stop very soon.
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------ 
>>>
>>>
>>> _______________________________________________
>>> NSRCA-discussion mailing list
>>> NSRCA-discussion at lists.nsrca.org
>>> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
>
>

-- 
Chad

www.chadnortheast.ca