building a 15s8p konin x4 for 120+v

C

cassschr1

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Aug 14, 2009
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LaCrosse, Wisconsin
hey guys,give me your thoughts on this. Pack size 6x11x3. Consists of 12 konin 3ah packs,copper strips are .025 thick,6" long. Blue spade connectors are for depiction only but can be used for balancing. This is not soldered up yet.I am concerned about the" cells in parallel before series" thing but this is the same thing isn't it? Building it this way gives a 60v batt for regular controllers and 120v plus for Lyens controller. capicaity will be 11ah each pack.Charging with a meanwell at 60v or in series for 120. Can also ch with FMA powerlab 8 for balancing. JPG[/attachment]
 
Do parallel first!!

but before paralleling ensure that the voltage difference between the lowest and the higest cell of each parallel group are under around 200mV to avoid charging the low cell with the high cell at a current rate too high. :wink:

Great job you did btw !! Just make sure that no cutting edge of any copper strip or nickel sheet can puncture the green plastic shell of the cell !.. or when soldering.. to not overheat and melt the green insulant!

it's similar to that i did two years ago :

1947b.jpg


Doc
 
A work of art. Very nice Job. Where did you find the copper strips and are you using silver solder? Thanks. Hope you dont mind a copycat but I'm going to try it.
 
calarco68 said:
A work of art. Very nice Job. Where did you find the copper strips and are you using silver solder? Thanks. Hope you dont mind a copycat but I'm going to try it.
Click to expand...


Sylver solder require alot more heat!!.. i dont recommand that to avoid damaging the cells.

Doc
 
The strips are from a copper sheet, 6"x24"x.025. From mcmaster carr. A friend of mine owns a steel rule die shop and he stamped these out . Some are .250 wide, one is .750 in the middle and ends are .370, and a small piece of .370 soldered to the top for a .050 thick. This works with the connectors that Lyen uses. I don't know what brand they are. I need to ask him....hey Ed, what are they? After stamping them out there perfectly flat.
 
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