Hey guys I’ll keep it short as im not sure how to safely get this thing under wraps and could use some advice asap.
Bought a Plutonium in June without battery. Purchased a “new” 12s6p battery from a member here. Hooked up BMS and battery, cell 1 was low from the start and would not balance and the board would not take a charge past 50% so I didn’t ride it much (maybe 10 miles) because I wanted to look at the battery hoping to find a loose weld or something…
Tonight was that night, I open it up only to find what looks like a ton of moisture and corrosion? It’s been hanging on a wall for like 8 weeks and was not like this when I got the battery that’s for sure. So I start to cut off the shrink wrap and the battery starts smoking, luckily I’m in the garage and was able to ditch it in the side yard before it ignited.
but now here it sits about 10ft from my house and I’m not sure the safest way to proceed? Pictures below. You can see where the burn started, once I through it down, it stopped.
Not sure how a bad Pgroup discharging itself would suddenly go off like that right as you take it apart. Makes me think something about its construction was off.
I started cutting from the top, here’s a better picture of that spot. The wrap wasn’t cut there that’s what melted when it was smoking. 5 seconds of smoking in the garage, 5 more carrying out, whole situation lasted less than 20 seconds but was/is scary AF.
Got it disconnected and further away from the house. Sitting on a board above a bin full of water.
It’s going into the low 30’s here tonight so everything outside will be covered in frost, including the battery if I leave it out - should I cover it with a blanket? Is it salvageable or do I cut my losses and call it toast?
the entire board was wall mounted, not just the battery, but yes that cell would have been on the bottom, no damage to the board or enclosure though so I don’t think it fell off, but that cell has been off (.9v) since I got the battery.
Yeah this was the plan tonight although overkill solar always showed p-group one not getting above .9v.
I can’t bother @Skyart with this one like I typically would, I have to give him at least two weeks free of esk8 bs before I do that. It’s an SKP battery but I did not get it directly from him like I should have, lesson learned.
Ive blown a hole into a test battery when spot welding. I put the cell inside a plastic bag, and the inside of the bag looked similar to condensation a week or so later.
Perhaps when you removed the heatshrink oxygen got inside and the liquid electrolyte did some science and smoked.
I think I’d carefully remove that p group from the other 11 and take the rest of the battery inside and measure them.
If that entire p group is 0.9v and not just 0.9v less than the other 11 groups it likely can’t catch fire unless you introduce a spark to the electrolyte, if present.
Can you connect to the smart bms still? What’s the resting voltage of the battery, who did you buy this from? This battery is atleast 4 years old and is not 6p I think this is an 8p
You know my style, burn it down / blow it up first then learn how not to do it again.
I was able to connect to BMS right before this happened, I’ll try again tonight. It’s outside in the grill, lid closed and yeah you’re right it’s 12s8p. Don’t want to out the previous owner, he gave disclosure that it was sitting for awhile but never used. Much more likely a weld was knocked loose during shipping or my wife ass blasted it with the hose watering flowers.
I did not do proper testing / due diligence before wiring it up and throwing it on a 10A charger to begin with. All my fault.
Yeah, it’s on the negative side. I looked at it quickly again the other day and noticed smaller burns on each cell on that side of the battery - would this identify a cause? I’ll get some better pictures. Thanks for the advice, I’ll update soon!
did you say there was moisture in the enclosure?
and yeah you’re right it’s 12s8p. Don’t want to out the previous owner, he gave disclosure that it was sitting for awhile but never used. Much more likely a weld was knocked loose during shipping or my wife ass blasted it with the hose watering flowers.