De-burring laptop pack pulls... How do you do yours?

Batteries and Chargers Rechargeable Batteries
1

Hi all,

So I discovered the wonderful way to get free 18650 batteries from laptop battery packs salvaged from Lowe’s, Home Depot, etc. Too cool. Did a ton of reading beforehand. I’m like a natural dismantling the packs. Was only mildly scary the first 2 I did but after that, no problem :slight_smile: Only got a small spark once, startled me at first hehe

Anyhow, I wanted to find out how you all de-burr the left over tab spot welds. Do you have any pics of ones you’ve done? I do have a little dremel kit but was unsure what to use on the spot welds and I didn’t want to possibly scuff up the tops/bottoms un-necessarily.

Thanks!

2

ill post pictures of mine tomorrow but scuffed isnt a bad thing and they will be smooth once finished

3

i use a dremel with a fine-stone grinding wheel, then a fine sanding disk to smooth the ends. I have done dozens of them so far wirth no problems.

4

I use this one.

5

just give the metal tab a good snap ( and twist if necessary) in a yanking motion with some kind of pliers. the tab comes off nice and smoothly. no need too grind anything down. done many packs and works great every time. just make sure you leave some metal to grab onto, cuz if you cut it too short you will have to grind it down.

6

I also pull the tabs off with pliers but the tiny spot weld still leaves a rough surface. I smooth them down with a Dremel, have used different tips and all worked fine.

7

Be careful when pulling/twisting not to deform the ends, especially the bottom since it does it more easily.

I also use a stone and then sanding wheel.

8

I use a fine tooth mill bastard file. I re-wrap them when I do it tho so it doesn’t matter that the wrappers get scuffed. I was tired of the little imperfections using a dremel left and I wanted it perfectly flat so I started filing them.

9

I trim the tabs with diagonal cutters and then smooth the corners and edges of the remaining piece of the tab using a small grinding wheel. The tab remnant helps ensure good contact with the next cell when I use them in series.

10

I too pull the tabs off with pliers. Then I use my rechargeable dremel to file off the burrs.

11

Pull the tabs off as cleanly as possible and clean up with a Dremel tool.

12

I think you need to talk to the files parents before using that sort af lanuage

13

ha , took me a sec but that was funny