Sandbox The LifePo4's

[Smokin]

The Idea is to get a Tub and put sand in like 4 inches and place the 300ah cells evenly spaced and pack sand around them and use cables "NOT BARS" and hook and then put a layer of sand on top. This sand should be clean like Play Sand you can get. The Batteries go outside and a Water systen can be employed to cool the pack when it goes exothermal . Need a vent stack. to vent the smoke. Someone should test this concept on LMC cells. YEAH?????..

I think if you burn a standard cell under sand the danger will be reduced to a managable level. Except for the fumes.

 

[MisterSandals]

If you have LiFePO4 cells, you should really compress them or at least contain them from expanding. Loosely packed does not sound like it would prevent any bloating.
I do like the idea of having these in sand.
Someone else suggested having a sand bag overhead, that would open when burned or melted was a sound idea too.

 

[Substrate]

Now you're just cracking me up with these steampunk safety methods.

Just got my can of top-balance spray in today - now in a convenient 24-ounce size for those large banks!

 

[BMcL]

Sounds a little ridiculous.
Just use a good BMS and use conservative charge/discharge settings with your inverter.
Putting a smoke alarm above the batteries is a good idea.
LifeP04 batteries tend to melt more than create a blaze. Keep flammable stuff away from them.

 

[Kilowatt Saver]

If you have LiFePO4 cells, you should really compress them or at least contain them from expanding. Loosely packed does not sound like it would prevent any bloating.
I do like the idea of having these in sand.
Someone else suggested having a sand bag overhead, that would open when burned or melted was a sound idea too.

I’m designing up an off grid 325W system to supply 70 W to an LED sign. I have 2 100Ah LiFeO4 batteries and have just over 1/2” gap between the batteries and the cabinet. Will that be enough from your experience to compensate from the bloating you are referring to?

 

[MisterSandals]

I have 2 100Ah LiFeO4 batteries

I am not aware of the need to compress/constrain batteries, only cells.

 

[sunshine]

and then put a layer of sand on top.

Maybe this will not allow any transfer of heat from the batteries under normal use and cause premature failure to the cells and/or BMS.