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Drokz`s Powerwall
#1
Hi everybody!

this summer i collected several boxes of laptop batteries, now its finaly done with cracking an testing.... Big Grin

So now iam waiting for parts ....
meanwhile i found a very good deal Big Grin Big Grin  from a guy who wanted to sell 13 packs of 80 p. These he had created for its outdoor lighting to do work.
so the packs are not mistreaded.... they are 127amp/pack


the planning is that i will they set to 7S and 2P (one more will make te 14)
And the cells that i tested wil make the 3de P
So at the end will it 7S3P

Greetz from Belgium
Drokz
Korishan, RikH, hbpowerwall And 1 others like this post
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#2
For celldiers, if you want them to charge properly, they need to be in a line Wink
Proceed with caution. Knowledge is Power! Literally! Cool 
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#3
Hahahaha Big Grin
yeah they are bit of out balance...
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#4
Looks great bud
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#5
Little update,

I have done my first pack, not really satisfied
Time is the problem.....

   
   
   
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#6
Looks pretty good overall. I know how the time thing gets in the way.

One thing you might want to adjust is either the length of time the solder is on the cells, or get a bigger iron. If solder balls, it's not a solid contact. Most of the solder on those cells are balls, and not a blob. There shouldn't be any curves going "under" the solder, it should be more flattened.
emerca and Drokz like this post
Proceed with caution. Knowledge is Power! Literally! Cool 
Knowledge is Power; Absolute Knowledge is Absolutely Shocking!
Certified 18650 Cell Reclamation Technician

Please come join in general chit-chat and randomness at Discord Chat (channels: general, 3d-printing, linux&coding, 18650, humor, ...)
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#7
little update...


still doing bleedingtests with the packs , 10 done, 11 to go...


iam searching an long time fore the beste setup parrallel connection...
@photo 2, thats the frame i make for it.



anyone good ideas please?
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#8
I was thinking about the same setup as you have.
If i was you, if i...., i would not change it, and keep it this way.
Only to connect everything in the front, is going to be a small hassle, maybe that German powerwall guy, with his copper tubes.
Thats very appealing to me

found his name: owitte, one post back
Still learning English. Learning Li ion and solar technology.

2800 cells in packs Exclamation above 2500mah and 90%soh.
~400 cells between 1800-2500 and above 90%soh(sell?)
600 cells between 2200 - 3000mah, 80-90%soh (sell?)
3000 waiting for testing.
approx: 0 cells not safe for use: dead, heaters, to high ir or sd/vamps

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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#9
With that much space in the middle you Will get sag in the packs that eventually can break the busbars. I suggest a proper shelf Smile
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#10
Hi all,


after a while, i did something again  Tongue
searching for parralel wiring..
I wonder how many amps they could handle.....
6cm X 2Cm X 1mm
 
 
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