Comment by marcosdumay
14 hours ago
There will probably never be a battery that can power your home but can be used without any kind of worry.
The right thing is to place the battery in a way that you don't have to worry abut the fire, not to expect a high-density battery to be perfectly safe.
Battery safety has very little to do with energy density. High energy density can make the outcomes worse for an unsafe battery, but doesn’t tell you anything about the risk of the fire to begin with.
The reason current Li-ion batteries are unsafe is that they contain a flammable electrolyte. There are batteries with higher energy density that have solid or semi-solid electrolytes. They’re so safe you should probably worry a lot more about driving your car than charging your battery.
Worrying about LFP or So-ion is probably also a waste of time.
LFP batteries are pretty safe. Look up some videos of demonstrations. You can cut them in half with a metal knife and nothing happens besides the loss of capacity, and I suppose the knife heats up from the short-circuit current as well.
I don't know what kind of chemistry shenanigans are going on to make that happen, but it's impressive.
A tank of diesel and a generator are a kind of battery that you have to worry about very little.
They are kind of difficult to recharge using solar panels. They also smell bad and are noisy.
Of course, but that was not the point. Evidently there are ways to store energy that are quite safe, so you can't conclude that all forms of storage are inherently unsafe.
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inherently self-limiting processes are nothing rare or special