General > General Technical Chat
Logic puzzle.... how many bus bars?
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paulca:
Found a local supplier with the right bus bars.  £5 for 4.  got 8.  Should arrive tomorrow.  Kinda means I need to hurry up and capacity order these cells so I can match pairs.

Note, I'm not bothering with actual capacity test.  I'm top balancing the pack with a nice long absorb time and then I'm going to run it flat to LVC or close to.

The lowest cell a that point will be matched with the highest cell from the other pack and so on.
EPAIII:
Exactly.




--- Quote from: T3sl4co1l on July 05, 2023, 10:47:08 am ---Would you not simply re-stack them using two 2-position bars and seven 4-position bars? ???

...<snip>...

Tim

--- End quote ---
paulca:

--- Quote from: EPAIII on July 10, 2023, 11:15:31 am ---Exactly.




--- Quote from: T3sl4co1l on July 05, 2023, 10:47:08 am ---Would you not simply re-stack them using two 2-position bars and seven 4-position bars? ???

...<snip>...

Tim

--- End quote ---

--- End quote ---

Ok.  Now find me those of the right size.
T3sl4co1l:

--- Quote from: paulca on July 10, 2023, 11:38:29 am ---Ok.  Now find me those of the right size.

--- End quote ---

Now, a missive reaction to the one-word reply -- 100% deserved, I get that.  But, why use an impossible request to do it..?  (You've given no dimensions, nor available / acceptable sources from which to shop or fab such parts; I'm certain the point is, you don't expect anyone to find anything.  Maybe this is a common use of phrasing in some areas that I'm just not aware of.)

Tim
paulca:
I honestly thought there might be a mathematical shortcut to not need 23 2 hole bars.

My original did lack a few details, mostly because of "hopping domains".  Hopping from domain of DIY solar power to the far wider, more generic electronics domain/audience.  I forgot there needed to be a lot more specifics as people wont be familiar that cells come in prismatic form and traditionally bus bars are 2 hole, terminaL to terminal only.

Part of the reason for limiting the number needed is because nickle plated copper bus bars not not cheap or even easy to find!   They ship 1 per cell with the cells.

Suggestions to use 4 hole bars or 3 hole bars, would be fine if I had a band-saw, a drill press and a nickel electro-plating bath.

Most of this was established about a week ago in the thread.  So people agreeing with previous points already rejected was starting to get annoying.
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