danrjones wrote: ↑
Fri Sep 13, 2019 11:05 am
For me a true ice replacement would need about 500 miles of range. Because 80% gives you 400, add in mountains and freeway speeds, and the fact most will not be comfortable taking it down to 5%. So 20 to 80% with freeway speeds and mountains must give me a range of around 250 to 275 miles. I do not want to stop more than that on a road trip. And I agree 250+ charging speeds. The good news is if the battery is large enough that 80 or even 70% is your 100%, you charge a lot faster.
Seems like we're in more or less complete agreement on what's needed for full ICE replacement. I'd even say 600 miles wouldn't be amiss, to allow for degradation and HVAC use. For full replacement I want at least four hours at 75 mph (80 mph preferred) plus at least a 30 mile reserve at the same speed with all the allowances as above, for at least 12 and preferably 15 or better yet 20 years. As a battery with that kind of longevity seems unlikely, I'm a big believer in battery leasing to keep the overall size/weight down. Let the leasing company worry about degradation.
If anyone comes up with a battery that will allow the full capacity (minus reserve) to be routinely used without hastening degradation, and which will last the car's lifetime, the total range can be reduced accordingly. And range can be traded off against charging speed to some extent, but as charging speeds that would replicate liquid/gaseous fuel energy replenishment times (<=5 min. to provide above range, which would require at least 1,200 kW) aren't likely anytime soon if ever, range is more critical. I don't mind stopping for 30-40 minutes every four hours or more as I can combine that with eating, but I'm not going to want to do that every two hours (or less) as is currently the case under those conditions. At least, it is in a BEV at an affordable price.