I’m picking up what you’re putting down John.
At this point, he hasn’t checked the individual cells at all, and there may be no deviation whatsoever.
The fact remains that the pack is still quite possibly damaged and a danger to himself and others.
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Yes it’s quite possibly damaged. There’s two options. Assume it is or actually use the multimeter and see. If that’s too dangerous for u … so it is I guess.
Quick erase it and hide it!!! He’s recommending using the multimeter!!!
Did he have one? Can he afford one? Can he remove the shrink wrap? Will he be able to get more shrink? Those seem the big questions.
"The water that damaged the BMS could have also shorted out P-groups, which could have brought their voltage down below safe minimums, which can start dissolving the anode in the electrolyte inside the cells. Forcing a charge into the battery around the BMS could then cover up this state, and you wouldn’t have much of a way to tell if you’ve damaged any of your electrode material. Using those cells afterwards in that state could be extremely dangerous.
Prior to the P-groups being charged, they could have simply been measured to assure they were all above 2.5V, but it’s now too late."
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The battery is gone now so its no longer an issue.
But while it was sitting in the dude’s house, completely undiagnosed, it was a danger.
Sure he could have checked things with a multimeter after the bulk charge but this isn’t going to give definitive answers. A very close approximation and educated guess could be made maybe, but not definitive.
The last thing any of us wants to see is a fire from bad advice given over the internet.
I apologise for going apeshit silencing your posts yesterday, it was wrong of me and it escalated what could have been a civilised discussion into a fucking shitshow.
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When u say, or quote someone saying, “wouldn’t have much of a way to tell”, thats not true and all he would have to do is bring the battery voltage back down, because it wasn’t balanced, which is what the owner did by riding it again. All he would’ve had to do is check the voltages.
Just above u hid the content of someone other than me this time. That’s aggravating because it seems an admin is using their ability to hide writing based on what they want and not what they’re supposed to. The fact it can be easily uncovered doesn’t matter
Sounds like a good argument for getting out the multimeter to see
If you can’t see any signs of water getting into the battery and there’s no mineral deposits that would happen from quick water evaporation, and u can’t find any evidence of shorting from water damage in the cell voltages, the likelihood of there being water damage that could be a danger …I’d say is small enough I’d assume it’s useable. Maybe someone would still feel it’s an unsafe battery and I can respect that but feel differently and I’m sure many who salvage cells feel the same.
Just to finish, and repeat what I’ve said before anyone feels a need to get on and say I’m a danger again, I’m not saying people should charge a questionable battery or ride it. In this guys situation he did both so I’m speaking about that. Above where I did recommend charging it would be only after already checking voltages are all the same when discharged and then I’d be watching voltages all along while charging. Maybe someone thinks THAT is bad advice. But I think that’s debatable
I’ve only used lifepo4 for like 5 years now because I’m afraid of fires from ion cells. I think I’m safer than anyone using ion cells because of that alone. If I’m doing experimental stuff gluing balance wires in potted batteries or not using fish paper and instead gluing blocks of cells, I still feel I’m safer than whatever precautions taken when using ion. I’ve destroyed many lifepo4 cells through continuous shorting and overcharging on purpose to know what dangers I’m dealing with. The idea being presented that I’m a danger… as I say I think it’s backwards
so…risk the pack catching on fire and probably burn down part of his apartment / house?
charging a pack without bms is already risky enough, we don’t need another potential fire. idgaf if assessing the pack is possible or not.
its not about if u can do it or not, its about if u SHOULD do it after all that has happened
x
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He discharged it riding it. That is the situation and I JUST wrote above that I’m talking about his specific situation
Get off ur high horse and read what I wrote
yes I think ANYONE using lifepo4 is likely safer than anyone using ion because the dangers aren’t as catastrophic. Lifepo4 aren’t going to go to flames other than puncturing it and even then it’s comparatively mild compared to ion and in what I’ve seen it doesn’t even get the other cells beside to catch fire.
that was when bms was still presented in the system, after bms has been removed, he charged it and asked on the forum if there is any concern / risk by doing so. maybe get ur timeline right?
when we all starting to pile on shouting at the poor dude to unplug immediately, he unplugged and put it outside.
i did not doubt lifepo4 is safer than liion, im doubting u being safe with any type of battery
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So everyone advised him to give a fully charged battery to a salvage place, when really they want it discharged. I would’ve told him to ride it around to discharge it. It would be outside. It would be safer discharged. Then he could look at the voltages to see if it was damaged.
Is this unsafe info?
Hummie.
Dude.
Let it go.
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When people let it go and stop talking crap about me I’ll let it go
Nobody is talking crap about you as a person. Just the bad advice you won’t let go of. It’s about machines, not people.
We all know you’re an awesome person.
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those places would have precautionary measures in case a battery fire happens, this is better than throw it in the bin, and probably setting a garbage truck, or whatever garbage collection or landfill on fire.
putting him at risk of fire again, i see
i don’t use reclaimed cell, nor am i an expert on how to salvage / reclaim random cells from old laptop battery or portable speakers or vaps. so is it unsafe info? maybe. should u try it at home? hack no.
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Read the guides and u too can become an expert on reclaiming cells
I recommend he discharge the battery outside in a safe place, like the street. That’s what’s advised by places that take batteries to reclaim them.
@b264 I disagree and don’t think my advising him to check voltages is bad advice. I don’t think my telling him to discharge the battery even while riding it is bad advice. I don’t think looking under the battery wrapper is bad advice.
You’ve said that, and literally everyone on the forum disagrees with you.
So, let’s move on.
The forum yes they disagree but the wider world reclaims cells and do exactly as I advised and there are multiple guides to reclaiming available for anyone to learn. They’re working with KNOWN damaged batteries while the OP had a battery with a known damaged bms and everyone encouraged him to throw it away because they said it was too dangerous to even find out if the actual battery was damaged.
You’ve said that, and literally everyone on the forum disagrees with you.
So, let’s move on.
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When people let it go and stop talking crap about me I’ll let it go, but otherwise I think it’s an interesting topic and happy to discuss it.
Fantastic.
How long do you think it will be until Future Motion, Inc. ceases business operations?
I’m surprised they haven’t folded already.
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