[NSRCA-discussion] Lipo Battery Connection Concoction Question

[Bob Richards]

Kurt,
   
  You can connnect anything together you want in series. It may not be a good idea, however. :-)
   
  Ideally, the packs should be the same mah capacity, and the same condition (identical cells, health, amount of use, etc). They do not have to be the same cell count. If you have mismatched packs, one pack may drop in voltage quicker than the other, and the LVC of the ESC will only see the series voltage and not the voltage of the individual packs. You could end up toasting the lower capacity pack.
   
  JMHO.
   
  Bob R.
  

Kurt Bozarth <kurt at bozarthhomes.com> wrote:
                I’m just getting into the larger electric motor set ups and have acquired several large 3 cell and 4 cell lipos.  My plan is to connect two of the 3 cell lipos in series to create a 6 cell package.  I have the same plan for my 4 cell lipos to make an 8cell package.  Here are my questions (bear with me, my EE classes were a long time ago):  
   
  1:  How close must the mAh ratings be when connecting several in series?
  2:  How close must the cell count (voltage)  be when connecting several in series”
   
  I would like to know if I could connect a 4000mAh 3cell lipo with a  5000mAh 4cell lipo (in series)?
   
  I do not want to overheat my giga-connecting-rubicle or fry one of my ampometer tendons in the process!
   
  Thank you very much,
  Kurt
   
     

   

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