DIY is a good thing -- as long as it's done with the attitude that you are learning, and will defer to caution, and do everything by the book with safety in mind. You clearly seem to have that attitude, and that's something I can respect. I love DIY stuff because it's a good way to learn, and I...
The charring on the wall suggests this was a fire started by the wiring for the charger, and *not* the car or battery pack itself. If it was the battery pack that had gone up in flames, you'd see a bright white powder (Lithium Hydroxide and Lithium Oxide are both white powders) coating the...