Mine were swollen like yours. From https://www.aliexpress.com/item/1005002283362084.html
This happened... Not sure if it was the cells or not...
This happened... Not sure if it was the cells or not...
Mine were swollen like yours. From https://www.aliexpress.com/item/1005002283362084.html
This happened... Not sure if it was the cells or not...
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I'm not too sure I was asleep when it happened. The smoke alarm woke me :/
The cells were fine when I top balanced / capacity tested. Although they were quite swollen. I thought this was normal.
They are the only two things I can think of.
- The cell swelled up so much it internally damaged and shorted
- My BMS may have failed causing over voltage to the cell.
I bought a YR1035+ resistance tester and will test the rest of the cells and report back.
What method do you recommend to use and how to calculate exact force required ?I would compress the cells as recommended and see what goes.
Yes, torque values are important and hard to compute in practiceMany posts show using aluminum or wood plates with threaded rod. Need to search to get some torque values.
Interesting, thank you.
I was in the gas for about 5 mins. Its not that bad.Interesting, thank you.
we need to compute torque on each nut so total force is not over 12 psi because 18 psi will destroy the cell and crack the safety valve.
but from why I see the valve is already swollen at maximum and I suspect that pressure inside is already at 15 psi, so if we do as you say with just 3psi of force applied will have the valve explode and release electrolyte gas that is toxic.
what do you think ?
thank you .
I was in the gas for about 5 mins. Its not that bad.
Just do it outside.
I got checked over by the ambulance. I think Hydrogen Chloride is what they said.do you know what the electrolyte gas has in composition ? i know it is toxic, in time ...
I got checked over by the ambulance. I think Hydrogen Chloride is what they said.
I'm not saying to breath it in lol. Just do it outside and you will be fine.
I would say fast gas release haha. Loads of it and only one battery vented.lol, you asked for the ambulance. Was an explosion or just slowly gas release ?
You'll need a really big shovel to move that amount of bulls**t.This is what they answered to me and they refuse to replace damaged batteries.
I opened a dispute and I will contact the authorities for fraud.
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Best shot is to go slow. I would discharge the cells to 3 volts for better chance of reabsorbing the internal gas. Maybe one turn per day on a pack of 4 until you get the bus bar on.Interesting, thank you.
we need to compute torque on each nut so total force is not over 12 psi because 18 psi will destroy the cell and crack the safety valve.
but from why I see the valve is already swollen at maximum and I suspect that pressure inside is already at 15 psi, so if we do as you say with just 3psi of force applied will have the valve explode and release electrolyte gas that is toxic.
what do you think ?
thank you .
+1 Ensure Ventilation !And by all means do not lean over the top of the battery as you tighten them. Stay upwind or have a fan blowing and use a long extension to put a turn on the screws.
Just some random thoughts. I have not been through this process.
You'll need a really big shovel to move that amount of bulls**t.
elvis, i am sure i am not the only one getting really frustrated here.yes, that is PWOD, i paid and waited for 115 days and received 144 cells. 32 cells from them do not have QR code and text on cell label is “product 300” and what is interesting is that the ones without QR are less swollen.
This leads me to the conclusion that cells were sent like that already swollen otherwise swollen effect would have been visible also to cells without QR code.
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