I tried to dismantle the most dangerous and hideous diy ebike battery ever made

[Monkeypowah]

Seriously, where would you start.
Its a lethal monstrosity.

https://youtu.be/jxBN2Ns52oQ

 

[fechter]

I'd drop it into a bucket of salt water and let it sit for a week. By then the cells should all be discharged enough to no longer be dangerous.

 

[Monkeypowah]

yup, I have realised it needs completely emptying before I can dispose of it anywhere.

 

[LewTwo]

Does your local law enforcement agency have a bomb disposal unit?
Perhaps they could use it in a demonstration ....

 

[ZeroEm]

Does this mean that potting a battery is bad or just the materials used?

 

[slaphappygamer]

I don’t think it was a good idea to encase the battery. Don’t the cells have vents? Where would they vent to? Seems like it might be a good place for condensation to collect and that would most definitely become a problem….I would think. Also, if your BMS went bad, you’d have to break it up and replace it. Also, also, I would totally wear gloves!

I know that there are different types of encapsulates. Some break away easily and some cure like a rock. I guess if you knew and you used a re-enterable encapsulant, part replacement wouldn’t be so bad. Still, I’d worry about condensation. I live by the ocean, so maybe this wouldn’t be a concern for others.

I guess another way would be to wrap the batteries in a type of tape, then encapsulate them. Then you’d just have to access the tape and rip the encapsulant off with it.

 

[Monkeypowah]

Its all the interconnecting wires that are soldered to the tabs, crossing over each other.
I tried to break it apart because a wire pulled out and the voltage dropped, no idea what the problem was.

 

[liveforphysics]

Does this mean that potting a battery is bad or just the materials used?

If you don't pot the battery, it's a disposable fire hazard when exposed to humidity and time.

Potting doesn't impact cell venting, I have the pressure curve data for different cells CID and vents to open in potting or bare, it's within a percent of the same pressures.

Potting in the right material is the ultimate long term protection from vibration, shock, corrosion, thermal runaway, and more.


Also, I wouldn't even call that pack potted in your video, as this implies a monolithic encapsulation, that disaster of a pack looks like an art class used up extra art casting supplies they had laying around trying to get some of it to land on the battery.

 

[Monkeypowah]

that disaster of a pack looks like an art class used up extra art casting supplies they had laying around trying to get some of it to land on the battery.

 

[999zip999]

OK LFP what is the ideal potting material for batteries for the DIY user ?