My battery has two holes and shows a little copper on - end

[Bobby June]

if I already planned on soildingbwire instead of welding nickel, would my well placed puddle act as a proper sealer?

Or does the eval solder go into the battery and ruin its soul like the exorcist?

 

[Bobby June]

oh, and btw…does anyone know of a killer video or pdf or thread that states THE best ways to tear down fully assembled batteries for reuse?

I mean, building a pack and applying it to a machine has danger bubbling all around. Pulling it out and repairing a broken connection is has additional issues like your memory of assembly, went into sleeve nice, comes out shorting, etc. reintroduces TR. Bringing the cells back to individuals with you pair of sharp dykes, Dremel or flipping over and shorting, etc. makes a mind less concerned catch fire.

Please, speaking of damnation, we all must have a Ten Commandments on these life cycles of a pack.

 

[rafalg]

Is this the 'nine circles of hell' model you built?

I would say commandment no #1 is you shall not disassemble something welded like that (i mean, like it's not meant to be disassembled under any circumstances)
But if you really have to, i would suggest to use good pliers to grab and quickly tear away whole nickel strips, starting on one side of the battery. Then the other side will be much safer to work with. Just like removing chest hair with wax strips (can't relate too much but this is how i'd approach this)

 

[Bobby June]

You had to start there!

Lol Well, what I need to do is to find the sleekest, most rigid, most thin walled battery enclosure (onesie twosie kind of thing) and just get used to using those. So many changes in the beginning.

I mean, my risk taking is admired in some circles but in this one is just not healthy So I I’ll find a way to think like that. And don’t say it. I already have a scare on my hand as 300 cells went up.

Thanks for that. if anyone’s feeling a little atheistic, please tell this Saint how being extremely correct makes us of the shadowy DiSObEy!!!.

 

[rafalg]

#2: You shall do it outside
#3: Think upfront where to toss the thing if it catches fire

and how the hell did you manage to put this together without any sleeves on the cells? Did they have any voltage?

 

[Bobby June]

Oh, pardon…yeah, that is the last two circumferences of a 21s4p placed inside one of those cool HarmonKardan sub enclosures. Here are outer ones. Don’t Zoom!! They are all fine. Emma….

 

[Bobby June]

#2: You shall do it outside
#3: Think upfront where to toss the thing if it catches fire

and how the hell did you manage to put this together without any sleeves on the cells? Did they have any voltage?

Oh, they have sleeves. They’re just clear.. and I’m going to dip the ends in roofing silicone as I ran out of sleeves and end donuts.

But it should look cool because the silicone is white and I’m gonna put like a little dot on the cell before I dip it to maintain the raw cell ends It’ll add some space between the batteries too just a little bit..

Oh, and thank you for the second and third Commandment. The outside part would be lovely, but I can’t do that however, I totally agree as a matter fact I went and got the two pots that I use for small batteries like this having having them sit next to me..

 

[docw009]

This guy has a good tutorial. The red cutters are one of the best tools.

 

[A-DamW]

and I’m going to dip the ends in roofing silicone

Watch out, some silicones are acetic acid cured, corrosive to electrical stuff.

 

[molybdenum]

Looks a little late now, but leaving the nickel strip on the battery when disassembling will prevent holes from being torn in them from the spot welds. Also if you must solder, the nickel strips buffer the battery from excess heat and are much easier to solder than the metal on the 18650 cans. I once read a technique for soldering these types of batteries; basically pre-tin the nickel left on the batteries. Get the fluxed pre-tinned wire good and hot before placing on pre-tinned battery surface, and immediately quench the heat with a cloth dampened with distilled water to prevent damage to the cells. This minimizes battery exposure to heat. Also using a powerful soldering iron is necessary to reduce time required to heat the wire and melt the solder. I'll see if I can find a reference to this technique, though I don't recommend soldering 18650 batteries. Too much risk of damaging the cells with heat.

 

[Bobby June]

Looks a little late now, but leaving the nickel strip on the battery when disassembling will prevent holes from being torn in them from the spot welds. Also if you must solder, the nickel strips buffer the battery from excess heat and are much easier to solder than the metal on the 18650 cans. I once read a technique for soldering these types of batteries; basically pre-tin the nickel left on the batteries. Get the fluxed pre-tinned wire good and hot before placing on pre-tinned battery surface, and immediately quench the heat with a cloth dampened with distilled water to prevent damage to the cells. This minimizes battery exposure to heat. Also using a powerful soldering iron is necessary to reduce time required to heat the wire and melt the solder. I'll see if I can find a reference to this technique, though I don't recommend soldering 18650 batteries. Too much risk of damaging the cells with heat.

Yeah, I really like your rule system of once once the battery is welded that the next step is always solder and to leave that nickel on there is perfect because who cares the soccer is gonna pour all inside of it so I love that idea thank you very much

 

[Bobby June]

Watch out, some silicones are acetic acid cured, corrosive to electrical stuff.

Oh shoot, I didn’t know that’s trippy. Maybe I’ll do a test on the battery but i peeled the silicone off of these batteries and there was no maybe I can’t see it but they didn’t seem to be any issue. They all claim to be 100% this is really good Henry roofing silicone hundred percent silicone so But that’s good to know. Thank you for that.