QUOTE(System Error Message @ Nov 4 2019, 09:03 PM)
that actually not so much the case. Unless the terminals used have less metal the whole idea is for the battery to be chargeable thousands of times.
The number of times you start/stop the car isnt that much of an issue, its a question of how much time the battery is spent not fully charged. Lead acids like being charged, hate being used like a regular battery. Starting the car isnt the hardest drain on the battery but rather not being fully charged is. When you start the car, the high amps temporarily disrupt the electrolyte and terminals, making the battery appear weaker so it needs longer to properly recharge as it would temporarily appear to have less capacity.
Its not much on how much you start/stop the car, but how much time the battery is further away from full charge. If you remember in the past, cars had much better battery life, because they didnt have any computers in the past so the battery never got drained. You would run into a mechanical issue much more often than a battery issue but nowadays with cars always using power, this is the biggest factor. You cant exactly disconnect the battery everytime and heat isnt the main factor in the lifespan, so thats why battery chargers do extend the life of the battery. A battery charger should last 20 years so even one under rm 400 will save you a significant amount of money (though you would be using power from the wall).
Its sad that we arent seeing supercap + battery commercially as this would mean 5-10 year lifespan for car batteries, but the recycling industry is reliant on this whole cycle of replacing batteries to survive.
to be precise, everytime you start the car, it encourages sulphation to appear due to the high amps making it unbalanced where the electrolyte around the terminals seem to have a lot less charge, hence the point about short trips is that it could take an hour or 2 every time to properly charge the battery as its not just about recharging the battery but to get rid of the sulphation.
mazda had the supercap concept not too long ago, their ieloop. But then they removed it. And even those models with ieloop supercapacitor, there is still the normal lead acid battery. So it is likely that supercaps can't retain much capacity.
You battery concept may be even heavier/bulkier, and not exactly sure how it will withstand in constant heat and vibration. Lead acid battery has been dominant for practical reason, not some cartel like dealings between lead acid battery manufacturers. Car makes would actually want to rid lead acid batteries very much.
The next best is lithium batteries, much much lighter while being energy dense, just cost prohibitive. Charge retention also not bad, but the usual degradation issue like those on consumer devices, cathode just wears out gradually/eventually.
Sulphation is one thing, but can be reversed as long as not being sulphated beyond a certain point.
But the lead plates will also degrade, this is due to the ion exchanges when electrical charging/discharging. This one cannot be reversed. That's why batteries that last long usually have very high purity/density lead plates. High vibration also detrimental, as certain portion of the semi degraded lead plates will break apart from harsh road surfaces.