You will want to do the same for synthetic clothing, cooking oil, and your cooking range & oven.

We already have houses burning down because people left the bacon unattended for a few seconds too long.

House batteries already have thermal management and fire suppression built in. Mount the battery on a brick or metal wall of your house as per the instructions and forget about the doomsday scenarios.

There's an interesting trade-off for people who go the DIY route: LFP batteries are pretty ideal for power storage, for a lot of reasons (safety, durability), but they don't deal well with cold and can't generally be charged if the temperature is below freezing. So, you can have them in the house (in the garage, perhaps) where they'll stay warm enough, or you can have them away from the house where they'll do less damage if something goes horribly wrong, but then you have to figure out how to keep them warm in the winter if freezing temperatures are a thing in your climate.

You can put them under ground. In most places with freezing temperatures even 0.5m below the surface would be enough if an entrance is insulated.