The original batteries, non lithium batteries were 20-80% range. I am not totally sure with lithium or sodium batteries. I've read different things and it's not worth it for ME to bother with it. As long as it works, that's all that matters to me. The computers seem to know what to do and Toyota has decided on a certain percentage and that works for me. Some people are really into finding out all about that stuff, and that's fine for them.
I work and got money from Li battery research but I am still not convinced with EV disposable cars. Li ion battery varies a lot depends who made it, eventhough they use the same technology. Generally, Li ion battery is happy with 40 to 60% charged state. The art is to design the anode so it will not crack at high charged and the cathode still have enough crystallinity when the battery is depleted.
You're still using that terminology. Do you have any examples of 'EV disposable cars'? Who and why would someone dispose of an EV? I assume you're going on about the battery degradation, that will slowly show up in an EV. If your Gasser had a known problem of the Gas Tank Shrinking,,, WHEN would you spend thousands to replace it? With EV's some charts seem to show that when Degradation is at 80% it's time to replace the pack. I don't understand that. My EV would be fine with an "80% gas tank". In fact I routinely use 'hilltop reserve' which is ~87% SOC. My Prius would be fine with an 80% gas tank. My Prius and my Bolt both have ~150k miles on them. For example.... Which car will have a major failure first? (I consider a head gasket failure 'Major'.) Yes, yes, you've dabbled in Li-Ion batteries at a job. Was it high-power packs with a proper TMS? Or was it flashlights, tools or toys? Laptops have been using them since before AC Propulsion got the idea to build big packs and use them in a car.(Ta'HayL with Leon) (Yay, the 18650 !) What's wrong with laptops, tablets and phones? They get replacement packs, when the time comes. No one disposes of them because of degradation. Well maybe the Rich do....
I would like to think that Toyota is still operating under the notion that excellent reliability creates strong brand loyalty. If my Prius overcharged my lithium cells to 4.4V like my Samsung phone, the batteries would perform better, but in less than 2 years they would be destroyed (as my phone battery did). I believe my Prius battery maxes out at 70% charge, which is about 3 volts. A hefty battery replacement bill after 2 years would destroy my loyalty to Toyota forever, I should think.
