Option to replace single cell

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2weiund2wanzig

New member
Joined
Jun 21, 2020
Messages
15
Hey,
i saw many styles of configuration of 18650 packs and i like the idea to make bus bars from installation cablecopper and connect the strands to larger busses to the connectors.
What i wonder is how you build packs so that you can replace a single cell (maybe when it gets warm) without resoldering the whole pack.
 

OffGridInTheCity

Well-known member
Joined
Dec 15, 2018
Messages
1,659
This is why you bendbusbars to traverse 'between'the cells in the 4 x 5 plastic cell holders. This lets you breakoff the littleplastic tabs... unsolder and push the bad cell thru and then push anew cell into place and re-solder.

Here's a great example from @HBPowerwall - see 2:39 where he actually pops out an old cell...

In addition, I build my packs to have 'empty slots' - so I canadd cells if I need to to boost a pack. I use the 4 x 5 plastic to physically protect the + and - lugs from sticking out past the end of the pack. And if you take this further - you could just cut the wire from a bad cell (leaving it in place)and use a blank spot to add a new cell - but I've not actually done that - I've just added a few cells here and there to help balance out the packs.

image_hfnmlj.jpg
 

2weiund2wanzig

New member
Joined
Jun 21, 2020
Messages
15
thats a good answer to my question. The empty spaces method and the method shown in the video are what i was looking for.
 

daromer

Moderator
Joined
Oct 8, 2016
Messages
5,671

How i do it. :)
 
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