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Old 06-21-2006, 07:12 AM   #1
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Default flux removal on battery cells

hi guys i was wondering how do you remove the old flux that has dried on the cells ? as solder wont stick on the cells that i need to re-assemble.
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Old 06-21-2006, 07:19 AM   #2
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sand paper
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Old 06-21-2006, 07:29 AM   #3
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Quote:
Originally Posted by drew85
sand paper
thanks drew
if i do that will the solder re-stick as i've once sanded down my iron tip and now the solder wont stick on the tip.

also what roughness would you recommend me using for the sandpaper?
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Old 06-21-2006, 07:30 AM   #4
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a dremel works well too
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Old 06-21-2006, 07:31 AM   #5
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Just get it off till the soder sticks, it does not all have to come off. Even a excato will work. just try it and see if it holds.
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Old 06-21-2006, 07:49 AM   #6
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after you disassemble the pack. hold the cell upright and heat the bottom of the cell till the solder drips off onto the soldering iron. then just flick the solder off the iron onto the cement. the solder wont stick to the cement.
watch out for your feet !!!! then use a dremel with a fine sanding drum.
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Old 06-21-2006, 07:50 AM   #7
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You need to re-tin your soldering iron tip. Get it clean, up to temperature and melt fresh resin core solder onto the tip to fully coat it with solder. You can wipe off contamination and excess solder with a quick swipe across a damp sponge.

Quote:
Originally Posted by BrainTeased
thanks drew
if i do that will the solder re-stick as i've once sanded down my iron tip and now the solder wont stick on the tip.

also what roughness would you recommend me using for the sandpaper?
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Old 06-21-2006, 02:08 PM   #8
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90% Isopropyl Alcohol on a shop rag removes flux in a jiffy, while cleaning your pack up. I've been using it for years with great results.

You can buy it at Walmart...it's in the self-care section with the red label. NOT the blue / purple label (Thats the 70% stuff.)
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Old 06-21-2006, 02:41 PM   #9
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Motor spray.
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Old 06-21-2006, 03:12 PM   #10
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Radio shack sells a flux remover spray. Its little and it dosent last long. I just leave the flux there. If its electronics grade rosin it does nothing harmful.

If it's acid core...
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Old 06-21-2006, 11:22 PM   #11
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Quote:
Originally Posted by BrainTeased
thanks drew
if i do that will the solder re-stick as i've once sanded down my iron tip and now the solder wont stick on the tip.

also what roughness would you recommend me using for the sandpaper?

wen u sand down the tip of your iron sand it so all the old solder comes off and it looks nice n new and then plug it in and keep the solder on the tip untill it starts to melt and then coat the whole thing quickly,you only get around a few minutes to coat it untill it gets out of the temp range and the tip goes all gold and solder wont stick......

and for removing flux just use some sandpaper
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Old 06-22-2006, 01:00 AM   #12
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Quote:
Originally Posted by Soviet
90% Isopropyl Alcohol
This is the way to clean up flux from a soldering point, that is the way we do it in the Airline’s

Sand paper & Dremel

Motor spray
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Old 06-22-2006, 02:33 AM   #13
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Trichloretylene (TCE), a common de-greaser, is excellent for cleaning up flux..it also gives solder a nice shiny effect.
Careful, this is very potent stuff so please use protection and keep out of reach of children..
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Old 06-22-2006, 06:27 AM   #14
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thanks guys!

i will try the sand paper method and some brake cleaner or some turps see how i go. sounds like there are 2 major methods , sand paper / dremel with tool tip and chemicals!

cheers for the info guys! will let you all know how i go and what works best and fastest
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Old 06-22-2006, 11:03 PM   #15
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I use vinergar to remove flux off my packs. Works great, althought I hate the smell of the stuff, it doesn't have any lasting arroma.
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