fire sprinklers inside battery enclosure with gas and heat detectors
Happened again, DIY battery fire
- Thread starter fmeili1
- Start date
jjww
Stuck in PG&E Land
EG4 powerpro battery already has fire extinguisher inside the case. anyone know how they work?
Likely a 'Condensed Aerosol Fire Extinguishing Device', like these:
Aerosol fire suppression system for new energy vehicles
Product type: S type Aerosol Fire Suppression system Model: QRR0.02GW/SHS-CN1 Rated dose: 0.02KG Protect area: 0.15 m³ Device Size: 90*140*15mm Start-up mode: Thermal self-start or Electric start Discharge Time: ≤5s Working Condition: Temp: -50℃—+90℃ Humidity: ≤95% N.W.: 410±10g Agent Validity...
www.s-firefighting.com
ScropusGobbleBottom
Corn Pop was a bad dude.
That is what dreams are made of! I think I need one too!know what I'm getting for Christmas
But a cell doesn't just start burning, and if you take the oxygen away (with LFP) there is a very good chance it will extinguish (if it's the electrolyte that's burning). You need a sustained heat source (fire) to make an LFP go thermal runaway. This device would prevent the possibility of this heat-source coming into existence.
Overcharging. Internal short due to contamination during manufacturing. Improper pack assembly. Dendrite growth from low temp cycling or aging.
Dendrites lead to high resistance, short lived 'shorts' which do not have the ability to heat up a cell to thermal runaway in the case of LFP. Low temp cycling and ageing do not lead to thermal runaway, same as overcharging: they will have the electrolyte break down and vent (and if an ignition source is present, burst into fire due to hydrogen), but the PO4 in the cathode does not break down in these circumstances.
John Kelly
New Member
Troll, much?
hwy17
Anti-Solar Enthusiast
It might seem that way. But I assure you it is my earnest opinion.
Yet we still get residence destroying fires. Blown fuse is unlikely cause. Using water as last resort is cheap insurance against total loss. That or keep batteries outside.
Sure, but not due to thermal runaway, but due to electrolyte breakdown. That's why the device I linked to (which I guess something similar is in some rack mount batteries) is useful none the less. This does not preclude using water in case things go wrong beyond this.
fmeili1
Solar Enthusiast
I think the key point is monitoring each batteries temperatures and current (e.g. with SolarAssistant) and disconnect the batteries in case the values getting too high.
Thats one of the reasons why I've integrated the batteries/inverters into my smart home system. In case the values getting unexpected high, a smart home rule disconnects the batteries from the AIO's.
In case EG4-LL-S will be used, each battery can aslo be disconnected from each other.
This will cover a lot of possible problematic cases... but even this will not be 100%... but close.
Thats one of the reasons why I've integrated the batteries/inverters into my smart home system. In case the values getting unexpected high, a smart home rule disconnects the batteries from the AIO's.
In case EG4-LL-S will be used, each battery can aslo be disconnected from each other.
This will cover a lot of possible problematic cases... but even this will not be 100%... but close.
Brucey
Solar Wizard
The 18650 power walls are generally actually safer because they are fused per cell...
If it bothers them enough, put them in a shed. Problem solved. Best part is, we don't need a bunch of gov bloat to hold our hand and make us feel safe.
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Having to climate control a shed is a nuisance and extra cost for the extra equipment and power to run it not to mention construction of it in the first place.
I think it is safe enough in a basement with some proper precautions. No wooden boxes, use enclosed metal boxes. Proper short circuit protection and fusing. Don't use particle board.
I think it is safe enough in a basement with some proper precautions. No wooden boxes, use enclosed metal boxes. Proper short circuit protection and fusing. Don't use particle board.
Fusing does not make them safe. Think of all those Tesla fires.
DudeInMyrtleBeach
New Member
It wasn't in stock when I got mine. There's something about having over 3 gallons of gas/diesel mixture strapped to my back that just does not appeal to me. Unless the tank goes on sale, then all bets are off.
DudeInMyrtleBeach
New Member
This is why I like it here.
timselectric
If I can do it, you can do it.
- Joined
- Feb 5, 2022
- Messages
- 19,885
Don't build houses out of wood.
It burns too.
It burns too.
OffGridForGood
Catch, make or grow everything you can.
Are these available for DIY purchase ? - ie to put inside a DIY battery pack?Likely a 'Condensed Aerosol Fire Extinguishing Device', like these:
Aerosol fire suppression system for new energy vehicles
Product type: S type Aerosol Fire Suppression system Model: QRR0.02GW/SHS-CN1 Rated dose: 0.02KG Protect area: 0.15 m³ Device Size: 90*140*15mm Start-up mode: Thermal self-start or Electric start Discharge Time: ≤5s Working Condition: Temp: -50℃—+90℃ Humidity: ≤95% N.W.: 410±10g Agent Validity...
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