Battery harvesting

Hi All, I'm new to all this, so I have a few questions.

Most of my 18650's come from a heap of dead electric bike batteries I got my hands on. They are harder to separate than laptop batteries because the spot weld seem to be stronger (maybe because they need to be to hold together under rough conditions)... anyway, one of the packs I pulled apart had all the batteries stuck together with glue and all the plastic covers came off when I tried to separate them. They tested up good. So What do I do with naked batteries.
Are they still safe to use ?

My next question... Because the spot welds are stronger, a few of the batteries get small holes in the negative end and sometimes a liquid comes out.
Are they still okay to use and is the liquid toxic ?

I am all new to this also. I do not know if I am correct and am happy to be schooled but i wouldn't think the liquid escaping is a good thing. As for a naked cell (naked he he) it probably will not be the end of the world however the risk of shorting or making unwanted contact will be a lot higher as i see it.

if in doubt you need to throw it out. you can't/shouldn't use anything that isn't perfect..

as for your naked batteries dress them up with <!-- m --><a class="postlink" href="http://www.ebay.com.au/itm/152269852125?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT">http://www.ebay.com.au/itm/152269852125 ... EBIDX%3AIT</a><!-- m -->

Don't EVER use batteries that are leaking liquid, especially if you know you punctured a whole in it. That's a disaster waiting to happen.

hbpowerwall said:

if in doubt you need to throw it out. you can't/shouldn't use anything that isn't perfect..

as for your naked batteries dress them up with <!-- m --><a class="postlink" href="http://www.ebay.com.au/itm/152269852125?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT">http://www.ebay.com.au/itm/152269852125 ... EBIDX%3AIT</a><!-- m -->

Click to expand...

Thanks for that. I go an buy some dresses for my naked batteries :lol:

While attaching a BMS to my e-bike DIY battery pack, I accidentally punchtured a cell by short-circuiting a sharp BMS solder connection over the cell, which tore the plastic sleeve and opened a small hole on the cell itself, which was bubbling a bit until I sealed it with some silicone and tape. The cell is a Samsung INR18650-29E and I've been monitoring it for around a week now. It seems to be working fine, lost nothing for over a week. What do you think will happen if I keep using it? I'm under the idea that INR batteries are somehow safer when it comes to violent explosions.

I won't say a ticking time bomb, but I will say you're asking for trouble. It may work for awhile, and work just fine, until it decides to fail, and hopefully it won't fail spectacularly. :s

You really should replace it, regardless. It's not worth the possible damage it could cause later.

Korishan said:

I won't say a ticking time bomb, but I will say you're asking for trouble. It may work for awhile, and work just fine, until it decides to fail, and hopefully it won't fail spectacularly. :s

You really should replace it, regardless. It's not worth the possible damage it could cause later.

Click to expand...

I agree. I wouldn't use a cell that had a hole in it. I wouldn't use any cell that had been physically damaged. Its not worth the risk.

Personally if a nickel strip is spotwelded too tightly I cut it with sharp pliers and leave whatever tiny pieces may remain.