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#41 (permalink)      5/2/2022 7:22:59 AM US Central   quote/reply + tips
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Vapor
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carrion4worm wrote:

If I were you, I'd just do a quick look on Youtube, to learn (if you want) to safely solder cells together. It's really quite common, and not dangerous - if precautions and common sense are used.




There is no safe way... Unless the cell comes with a welded tab attached... No manufacture condones the practice... The safe way you attach something to a cell is with a weld...

Directly under the cap is the pressure relief valve... A sealing gasket for sealing the exhaust passage is fixed on the lower top... Warp it and you will have a bad day...

Can a battery be soldered? sure... Just as climbing can be done without a safety line...

It is time we stop accepting the things we cannot change, and start changing the things we cannot accept...
#42 (permalink)      5/2/2022 12:51:11 PM US Central   quote/reply + tips
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analogueman
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I've soldered a cell once; about two years ago. It was replacing an internal 18490 cell in a DNA-40 mini-mod.

The old cell was one of those 'shrink-wrapped designed-for-the-purpose' jobbies, so it meant cutting the wires to remove it. Then simply scored both positive and negative ends of the new cell, tinned the ends of both connecting wires, and soldered each one in turn, finally sealing both ends with insulating tape. No great drama.

I guess one of the biggest risks is inadvertently creating an electrical path between the positive and negative of the battery while doing it, creating a hard short.
It's twelve inches long, but don't use it as a rule...
#43 (permalink)      5/3/2022 5:58:26 AM US Central   quote/reply + tips
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carrion4worm
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Vapor wrote:

carrion4worm wrote:
If I were you, I'd just do a quick look on Youtube, to learn (if you want) to safely solder cells together. It's really quite common, and not dangerous - if precautions and common sense are used.


There is no safe way... Unless the cell comes with a welded tab attached... No manufacture condones the practice... The safe way you attach something to a cell is with a weld...

Directly under the cap is the pressure relief valve... A sealing gasket for sealing the exhaust passage is fixed on the lower top... Warp it and you will have a bad day...

Can a battery be soldered? sure... Just as climbing can be done without a safety line...


I guess "safe" depends on the aptitude of the user. As someoknbe who's done it dozens of times, you are imagining a scenario that just isn't that likely. I've vented quite a few 18650's, but none from a quick application of solder. Believe me, a cell gets hot MUCH faster and is much more dangerous when exposed to a hard short with a mech - where you MIGHT have 15-20 seconds to remove it before venting.

But yes, I also work daily in Scissor lifts or Booms, many times with no lanyard...so maybe you could say I've got a penchant for "living dangerously"! More likely, you have no clue about the entire world of E-bikes, power walls, or Green energy in general, where this "homebrew" soldering method is common place.

Learning is good. It never hurts to be exposed to new things.

What does he mean when he says words?
#44 (permalink)      5/3/2022 6:44:57 AM US Central   quote/reply + tips
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Vapor
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^ Agreed you should learn how to use the proper tools and do the job right...

Oh and maybe rain in your assumptions... There is much you assume to know grasshopper...

Edited on 5/3/2022 at 6:46 AM
It is time we stop accepting the things we cannot change, and start changing the things we cannot accept...
#45 (permalink)      7/27/2022 7:39:22 PM US Central  
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#46 (permalink)      7/27/2022 7:41:22 PM US Central  
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#47 (permalink)      7/28/2022 3:53:17 PM US Central   quote/reply + tips
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cilika
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