Battery pack tear offs - RCCanada - Canada Radio Controlled Hobby Forum
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Old 08-25-2008, 08:23 AM   #1
Ken Currell
I am: Ken Currell
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Battery pack tear offs

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I have been cycling a large number of lithium Ion cells in order to build some battery packs. They aren't large packs but after I cycled quite a few cells I thought I would build a couple of packs to try them out.

I put the packs together with a bit of hot melt glue to hold them together to make it easier to wire them. I had put them aside and continued to cycle cells. Suddenly a couple of cells had readings that were a perfect match for some of the cells in the packs I had just built.

Well I guess I kind of jumped the gun on that one. I had labelled each cell and wrote down the capacity of each cell to make the cells easier to group together. When I tried to pull the pack apart it was very difficult to do except for a couple of cells where the glue was on the label. The label ripped instead of tearing the thin heat shrink off of the cell.


That was the solution to the problem.

Put a label on each cell and apply the glue to the labels when joining the cells. If you want to repalce a cell or reconfigure the pack the paer label will tear before the heat shrink is ruined.

The cell at the far left end of the pack has the original heat shrink. It is so thin you can see through it and it is very easy to pierce or rip it. The labels are easy to remove but strong enough to hold the pack together until it is wired up and encapsulated in heat shrink tubing.
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Last edited by Ken Currell; 08-25-2008 at 11:06 AM.
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Old 09-03-2008, 08:07 AM   #2
I am: Cedric V.
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Re: Battery pack tear offs

In the past I've used latex caulking to stick the cells together when assembling packs - it takes overnight to dry but you can just cut the cells apart if you have to and it's also slightly flexible - my tuppence worth!.
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Old 09-03-2008, 08:59 AM   #3
Ken Currell
I am: Ken Currell
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Re: Battery pack tear offs

The caulking will work but I don't like the waiting time nor the clean up if you need to pull them apart.

With the Makita cells the plastic insulation is so thin it needs some extra protection and insulation. The paper labels are doing double duty in this case.

I have had to re-cofigure one of my packs and it was easy to pull apart and no solvent was required to remove the labels.

No clean up of the cells was required. I just put 2 new labels on and put them together with more hot melt glue. Total job took about 15 minutes most of which was spent waiting for the glue gun to heat up.
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