[NSRCA-discussion] LI-IO packs

[Daniel Dupont]

So Jim if I understand correctly Lithium-ion cells are basically cheap
Lipo¹s?

Hum I always believed they were a slightly different technologyŠ.

Daniel on MacBook Pro




On 10/31/2013, 1:46 PM, "joddino at socal.rr.com" <joddino at socal.rr.com>
wrote:

>
>---- Scott McHarg <scmcharg at gmail.com> wrote:
>> Morning y'all,
>> 
>> I've spoken to a few people about charging Lithium Ion packs but we did
>>not
>> arrive at a definitive answer.  I need to understand what the best
>>solution
>> (besides buying another charger) is for my situation.
>> 
>> I consider myself fairly knowledgeable about the Cellpro 10XP.  Usually,
>> it's me giving the help but I'm not sure what to do here.  Here's the
>> scenario:
>> 
>>  Cellpro 10XP Multi-Chemistry Charger.  The User Manual and everything
>> about the charger says that it can charge the ION packs.  So, I go to
>> program a preset for this but in the software, there is nothing that
>>says
>> anything about ION packs.  There is LiPo, Pb, A123, Ni-Cd, and Nickel
>> Metal.  I have some ION 7.4V 5200mah packs that I need to charge and a
>> 2600mah pack for the ignition on a 42% Edge 540.  The packs are made of
>>4
>> cells but are wired so that they are only 2 (2 in series, 2 in parallel)
>> cells.  As close as I can tell, I should select the LiPo 2sU (2 cell
>> unbalanced) but I don't want to make a mistake.  Someone told me that
>>would
>> be OK and another said that if you program the charger by the charger
>> instead of the software, there is an ION setting but I haven't confirmed
>> that yet as it was late last night when I was checking.
>> 
>> Anyone have any idea what to do to charge these packs?
>> 
>> Thanks,
>> 
>> -- 
>> *Scott A. McHarg*
>> Sr. Systems Engineer - Infrastructure
>
>If they are lithium-ion cells they should be charged to 4.2 volts per
>cell or 8.4 volts for a 2s pack.  Lithium polymer cells are lithium ion
>and are charged the same.  My Cellpro charger charges to 4.204 volts per
>cell when set for LiPo packs and that is what should be used for Lithium
>ion.  The Lithium ion cells generally have higher internal resistance and
>therefore can not be discharged or charged at high rates.  I use one C
>max.  
>
>Jim O
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