apparently some cars, and more newer cars come with battery heat shields: a casing to protect the battery from the engine heat:
Is that truly useful?
–> 6mm thick Aluminum foil + Muffler Cotton Car Indoor Heat Sound Deadening Insulation Soundproof Dampening Mat:
it’s flame retardant and heat resistant upto 105 deg C (221 deg F), but the outer aluminium means it’s conductive, so maybe not suitable to wrap the battery sides and bottom in it (leaving the top open obviously)?
They seem to use it to cover the inside of the bonnet, so I suppose heat wise it should be fine?
Reason is because in Thailand car batteries die rather young (around 1 year), and I’ve read that car batteries do not charge well when hot (anything above 55 deg C), so if the battery would remain less hot longer, it would get a better charge, and since the worst for a car battery is to lose 50% of its charge = dead battery.
Would be a cheap solution, but most likely not helping much since after some time the whole engine compartment will heat up eventually… also read that it could work the other way around: the battery will not cool down as fast after driving, keeping it longer at higher temperature…
so possibly those new cars have it for cold countries to help start during winter time?