CrankyCoder Build

CrankyCoder

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Mar 11, 2017
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Ok. So I had a little time to work on my build this weekend.

I listed out all my battery capacities and using repackr.com spec'd my first small test pack.

[img=800x600]http://crankycoder.net/wp-content/uploads/2017/03/IMG_2104.jpg[/img]
(yes i know, there are some junk batteries in there)

[img=600x800]http://crankycoder.net/wp-content/uploads/2017/03/IMG_2113.jpg[/img]



After figuring out which batteries I was going to use I cleaned them up, removed the sleeves and resleeved them. I 3dprinted the top holder and here we go

[img=600x600]http://crankycoder.net/wp-content/uploads/2017/03/IMG_2118.jpg[/img]



So now I am up to the next part of figuring out the best way to wire up this pack. Meaning the physical wiring. Should I use a fuse wire to connect everything? then use a big inline fuse between the pack and whatever I am powering?

Thoughts?
:D
 
For a power wall and if you have the stuff fuses on each cell just brings you some slight extra safety. The increased resistance due to those fuses is not a big deal on power walls for most of us.
And then you just keep 1 fuse per string or per the full pack depending on how you set it up.
Im using 1 ANL fuse per String and then 1 master.... To much? :) Might be but i keep it safe and have no issues with that extra resistance due to the massive amount i have today.
(I should most likely updated my project page... But i have to wait some more due to still ongoing work.... :) )
 
daromer said:
For a power wall and if you have the stuff fuses on each cell just brings you some slight extra safety. The increased resistance due to those fuses is not a big deal on power walls for most of us.
And then you just keep 1 fuse per string or per the full pack depending on how you set it up.
Im using 1 ANL fuse per String and then 1 master.... To much? :) Might be but i keep it safe and have no issues with that extra resistance due to the massive amount i have today.
(I should most likely updated my project page... But i have to wait some more due to still ongoing work.... :) )

any recommendations for my tiny pack? :)
 
Depending on the max current i would use 35AWG tinned copper fuse wire for fusing and either using 1.5mm2 or 2.5mm2 that i twist for the bus bar.
 
daromer said:
Depending on the max current i would use 35AWG tinned copper fuse wire for fusing and either using 1.5mm2 or 2.5mm2 that i twist for the bus bar.

there is a radioshack down the street from me going out of business and dumping all their stuff. I may grab a bunch of wire tonight and see what all I can come up with.


mike said:
I'm using this for fuse wire, works great.
http://www.ebay.com/itm/371749516590

what's the rough amperage before it burns up?
 
CrankyCoder said:
mike said:
I'm using this for fuse wire, works great.
http://www.ebay.com/itm/371749516590

what's the rough amperage before it burns up?

When soldered to bus bars, it has been tested around 18-20A I believe. If you take a piece of it and connect the negative/positive terminal of a single cell, it burns up instantly, which is what I'm going for. Short circuit protection. I think using 35AWG, you are going to see increased resistance which is undesirable in a battery pack of any kind.
 
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