Breaker on the rack would trip.
Wow, basen rack.mounts batteries destroy a home in germany
- Thread starter houseofancients
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Breaker on the rack would trip.
Zwy
Emperor Of Solar
The gas in the box doesn't ignite under that theory, another hard to believe scenario.
There looks to be 32 pouch cells on each half, my guess is 4P or the other alternative would be 2P with 2 strings in parallel.
Hedges
I See Electromagnetic Fields!
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And concentration inside the battery being near 100%, doesn't burn or explode.
Alternative is natural gas. What is explanation for puffing?
Zwy
Emperor Of Solar
You see this inside fuel tanks on vehicles, the fuel runs thru the fuel pump armature and windings for cooling purposes. People don't realize there are sparks from the armature with gas all around it. It can't explode, there isn't any oxygen.
If the gas inside the battery is 100%, then it displaced oxygen. No ignition possible internally, even if ignition occurred outside the battery. Which you allude to below, why the puffing?
My theory is the battery was possibly an ignition source of a natural gas leak.
The homeowner was negligent, it seems from original story he knew there was a problem before the explosion.
Hedges
I See Electromagnetic Fields!
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Could be natural gas was inside room and battery. Over-pressure was enough to blow out walls but not to disassemble the battery box. Ignition doesn't have to come from battery, and I wouldn't expect it to unless there was a relay.
The cells got charred. Was there a subsequent fire? Were they first damaged by the explosion?
Haven't read the report to see how they arrived at initial conclusion, "The battery did it!"
The cells got charred. Was there a subsequent fire? Were they first damaged by the explosion?
Haven't read the report to see how they arrived at initial conclusion, "The battery did it!"
Zwy
Emperor Of Solar
I agree with your assessment. Just too many unanswered questions.
It will be "the battery did" it so government can enact more control over rogue DIY people building batteries.
mement0
New Member
The pictures were taken by the homeowner (a professional electrician) - he posted them on a German language forum.
Here's a google translate of his forum post:
Good morning,
The trigger was the middle battery of the 3. A BASEN that had been running for 1.5 years. Without making a binding statement, it boils down to a technical defect. The batteries were opened on site by the expert. LiFePO4 pouch cells were installed (16S4P). (According to the sales picture they should be prismatic (16S1P)). Since the pouches are no longer sold in China, the problem seems to be known...
Maybe the 4p is also causing problems? We are currently checking whether further testing in the laboratory would make sense in order to make possible claims for recourse to China. (Probably not)
And as bonus information for all self-builders > No CE mark, no insurance! Was present in my case. But just for information for anyone with a self-made battery made of single cells who is not an electrician! The insurance company/appraiser MUST see a CE mark, from whomever!
The middle damage battery from BASEN (picture 1).The prismatic blue ones are from the new battery that was added in 2023. (another picture from an unaffected battery) They are unaffected and are fully charged.
The new battery from 2023. (Layed above the damaged battery). Indirect thermal impact but otherwise OK. All the valves are still closed.
Here as they are still in the basement(picture 2 from my previous post). As I said, there are three, the lowest one is still hidden in the rubble.
The top pregnant one is the new one from 2023, undamaged."
I'm afraid I misread this initially - it means that the bulged battery was NOT the one that degassed.
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