Zapper77
Renaissance Man
- Joined
- Jul 23, 2022
- Messages
- 2,321
Looks like some form of black duck tape used to hold the cells together. Obviously the "professional" installer skipped a few basic cell protection features.
LiFePo4 Cell went up in smoke and flame!!
- Thread starter mpopo
- Start date
Zapper77
Renaissance Man
- Joined
- Jul 23, 2022
- Messages
- 2,321
Tape counts as compression, right?
batteryfinds.com
Should I make LiFePO4 Battery Compression？
Currently, LiFePO4 battery compression is the more recommended practice, which can prolong battery life and enhance performance.
batteryfinds.com
I’m not seeing any fire extinguisher residue. So was it CO2 or washed? The terminal, cable or buss is completely missing. Was it removed post event or did it burn away. Could a very loose terminal + high current possibly have cascaded to this? Were you charging/discharging when you happened to be there?
Zwy
Solar Wizard
rodrick
Free energy enthusiast
Bare unprotected cells stuffed under a seat could have been damaged mechanically maybe a redesign is in order
Last edited:
Tulex
Solar Wizard
Zwy
Solar Wizard
It's all in fun and jest, it was confusing.
Sorry Steve but the way it was written I about sprayed coffee all over my screen.
Not unless it provides an even pressure across the cell end plates.
I found the thread that I recalled in my posing #20 on page 1 of this thread...
280AH EVE CELL LASTED ONLY TWO YEARS
Hello All, I was one of the early purchasers of the 280ah EVE cells from Amy and one of the cells has malfunctioned already. Do these things have a warranty? How can I reach Amy now days? Is she the one in Houston now? About the bad cell, it has swollen tremendously and will not take a...
diysolarforum.com
rodrick
Free energy enthusiast
Hey the pictures were correct and that’s what most guys want in there reading material good pictures?
Zapper77
Renaissance Man
- Joined
- Jul 23, 2022
- Messages
- 2,321
Sorry Sarcasm didn't come across efficiently in my text. I'll add a laughing emoj next time. ?
Ampster
Renewable Energy Hobbyist
That would be my guess as well. Also with LiFePO4 the smoke was presumably the melting insulation on the cable.
Overcharged definitely not. Dented corners. All looked ok, maybe? Not sure. But would say not ..
Alkaline
Solar Wizard
Potential Problems:
1) Loose bus bars heat up?
2) Rubbing Cells Poorly Secured could have caused a short circuit.
3) Grade B cells and weak/damaged case weldings. This seems to happen more and more, starting form the bigbattery fiasco and now seeing people having issues with 18650 grade B cells, I think more and more we are finding these things creeping up. I just looked at your picture and QR code location would indicate grade B.
Overall, I would have a chat with the "professional" who did your install...
1) Loose bus bars heat up?
2) Rubbing Cells Poorly Secured could have caused a short circuit.
3) Grade B cells and weak/damaged case weldings. This seems to happen more and more, starting form the bigbattery fiasco and now seeing people having issues with 18650 grade B cells, I think more and more we are finding these things creeping up. I just looked at your picture and QR code location would indicate grade B.
Overall, I would have a chat with the "professional" who did your install...
with nylon straps bolted to the floor of the van. quite impossible to move.
Actually no. Although this set of cells was recently plugged into the system. So it had about a week of charging/discharging with not a lot of driving. (currently at home, not traveling)
Ok, with this I would totally agree. They were not. That might be one of the reasons. maybe? Still hope it is a defective cell and a seller which is gone from the face of the earth.
Black tape was there to secure the cells before the silicone glue started to work. One part of the black tape was also to insulate the connections And yes, better separation. Although, the problem happened inside one cell. the others look intact, but still not planning on using them further, as per the dubious seller.
As I said, I was there, it all happened in seconds. After seeing the flame and extinguishing was 5 seconds. And it began slow. I learned that LiFePo4 fire is not the same as standard Li-ion (cobalt)
Attachments
Which end failed? Was it by chance the negative end?
“Black tape was there to secure the cells before the silicone glue started to work.”
Be very careful what type of silicone you use around electrical. The acidic type has a strong vinegar smell and is highly corrosive to copper, zinc, tin, lead and most aluminum alloys in the vicinity along with the presence of moisture(even humid air). It does not need to be in contact with the metal to be damaging and it can outgas for many months and much worse in an area of poor ventilation. Use electrical grade silicone or ShoeGoop around your electrical. Note, ShoeGoop can soften or melt some plastics. Have you ever sealed up a box really good with common silicone to keep the rain out just to open it up later and all the wires are a green mess? Now you know.
Be very careful what type of silicone you use around electrical. The acidic type has a strong vinegar smell and is highly corrosive to copper, zinc, tin, lead and most aluminum alloys in the vicinity along with the presence of moisture(even humid air). It does not need to be in contact with the metal to be damaging and it can outgas for many months and much worse in an area of poor ventilation. Use electrical grade silicone or ShoeGoop around your electrical. Note, ShoeGoop can soften or melt some plastics. Have you ever sealed up a box really good with common silicone to keep the rain out just to open it up later and all the wires are a green mess? Now you know.
I don't consider it to be acceptable, certainly not in a mobile environment.
With respect to Steve's pictures, we don't know which direction the pouches (if the cells use pouches) are oriented within the cell. As I recall, the EVE cells are like a jelly roll, so they have no uniform orientation within the cell.
It's been a while since I thought about it, but I thought there was a thread a couple years back where a forum member got in contact with an EVE engineer and they said long side down was OK. There was so much confusion on the topic that I threw up my hands and designed my system so the cells were oriented terminals up, even though long side down would have given me much more flexibility.
I checked my copy of the 2019 EVE data sheet and it doesn't address orientation.
Last edited:
Similar threads
