Remove glue/rubber from harvested batteries?

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Wizzie2k

New member
Joined
Jul 21, 2021
Messages
3
Hi,

how do you remove the white/black glue/rubber-stuff from your harvested batteries? Scraping it off with a plastic pry tool, like you use to open a mobile phone/laptop, sometimes rips the heatshrink. Do you use a solvent or what do you do? All suggestions appreciated.
 

hbpowerwall

Administrator
Joined
Oct 7, 2016
Messages
1,976
Honestly, just rewrap them SO much faster... if that isn't an option I've see some 3D print a sleeve that's a tight fit and slide the cell through it scraping the excess gunk off..
 

italianuser

Member
Joined
Feb 25, 2020
Messages
340
I try reducing the rubber/white stuff using a blade taken from a disposable razor blade, they are very very small, have thin blades and are flexible. But result always leaves some residual although I manage to cut right down to the wrapping.

blade.jpeg

So... I learnt how to rewrap them, last night I did over 10 using my wife's hairdryer and those small round magnets to hold the cell still on a large/solid magnetic base. Real easy.

rewrapped cells.jpeg two colour wrapping.jpeg

Wrappings cost less than 2 cents each.
 

OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
1,708
I have OCD so I wore out my fingernails, then went to a razorblade tool, then blew the muscles in my arm from holding-tight/squiggling too much!
These days - I only buy things that don't need much scraping... those RING cells were a dream but they seem gone now. :)

Agree that re-wrapping is very easy, a hot-air 'gun' makes it a snap.
 

Wolf

Active member
Joined
Sep 25, 2018
Messages
1,563
Re wrap is the solution.
Get your re-wrapping tubes here.
see
and

Wolf
 

Korishan

Moderator
Joined
Jan 7, 2017
Messages
6,522
I agree, re-wrap those cells if possible. Trying to get the gummy glue off will wear your hands slap out. You won't know how many muscles you have in your hand/forearm until you start getting rid of this nasty glue the manual way.

If you need to keep track of the cells "after" you've rewrapped them, you can use a label maker to print the numbers back on the cell. Also, if you want to keep detailed information about the cells (like charge cycles, degredation, charges/discharged, etc) you can go with one of the guys builds here that monitors all that. It's made with an arduino (I think) and barcode scanner. I'm pretty sure @Wolf knows who this is. I can't remember who has this build as it's been awhile :rolleyes:
 

hbpowerwall

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Joined
Oct 7, 2016
Messages
1,976

italianuser

Member
Joined
Feb 25, 2020
Messages
340
(y)
I bought 100 wraps, mixed colours from AliExpress, if I'm lucky I'll have them in 20 days, otherwise in 40/50 days!

1627552689135.png


When I need something quick I buy it from Europe spending more money, yes; sometimes I make two orders together, one from Europe and one from China, so I can start working as soon as the first order is delivered, meanwhile the second order should arrive.
 
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