You may think of your battery as something separate and distinct from your engine, but the truth is that the two systems actually do affect each other. A poorly maintained engine can actually overload and damage a car battery, reducing its overall lifespan. As far as I know it's reguarly done in a lot of cars, but I couldn't find anything on Google about how it was done, or any accounts of people doing it themselves.

Your story about “nursing a weak battery” reminded me of a time years ago when I nursed a battery on my 1968 Ford. Trying out new, complex material designs to discover the safest, most efficient method of creating an EV battery has become a part of the design process. You have it backwards, battery insulators are used to protect batteries from excess engine heat rather than protect them from cold, as extreme heat is worse for batteries than cold. Silicone can protect EV batteries in multiple ways depending on the design, such as insulating individual cells from heat or by conducting it to other parts of the battery.I want the best for this little Fiat but, right now, I don't really know if making this insulation is worth. For example, when ceramic is combined with silicone, it creates an extremely heat-resistant combination. None of my cars have the battery directly behind the radiator, they are all off to the side of the engine bay.

What have people done with the insulation jacket from the original battery as the replacement is bigger? Giving your car battery all it needs for a full, productive life is not all that complicated, is it? I wouldn't worry too much about the battery bouncing, mine was unfixed for years and it never caused any harm, that was with plenty of off roading, ended up building a bracket though just to stop the annoying MOT advisory! I've read batteries suffer most from the heat coming from the engine, rather than the cold temperatures during winter. Agree and bottom line is the car manufacturer spent an extra 25 cents (maybe more) or so when building the vehicle to put it there, so there is a reason or they would not have.Depending on the individual battery design, thermal gap pads might fit in between the individual battery cells or between the electric battery and the vehicle’s chassis. They don’t have any insulation because, one, they’re designed to work to ungodly low temperatures, and two, even if they had insulation, there’s no internal heat source, so there’d be no heat for the insulation to trap in. After the battery heats up to engine bay temp (which it will on any drive 30+ minutes regardless of insulation), all the insulation is going to do is keep the heat in after the car is off and kill the battery faster. Part of my thinking was, due to the petrol shortage problem in the SW of England that we are having at this time, the car would stay unused for extended periods. Some countries control things better (differently) to others and knowing what is acceptable is crucial.