On 05/08/2014 09:43 AM, Bill Dennis via EV wrote:
Lee wrote:
But suppose you want to know how far you can go at a given speed (i.e. a
given load).
That is a much more complex calculation
I rented a Leaf recently, and I really don't like the "miles remaining"
thing. It varies too much. If you're going uphill, it gives a smaller
number of miles remaining. Then when you get back on level ground, miles go
back up. Going downhill it changes again. Talk about range anxiety. I'd
much rather have just as Empty-Full gauge as a regular car does. Then I can
see just how fast the gauge is going down and estimate for myself. I think
most people who have driving ICE cars all their lives have the same
instinct. The "miles remaining" is only a rough estimate anyway, just like
the rough estimate I'd make by looking at the Empty-Full gauge.
I'd be interested to hear other people's take on it.
The Leaf instrumentation is complete crap. Tesla instrumentation is
pretty good. Both pale in comparison to a simple TBS type amp-hour
counter. With a lithium battery and a good amp-hour counter, you can
easily mentally compute a credible miles remaining. That's assuming you
regularly test your battery capacity. At any time, you will know how
many amp-hours you have left and, therefore, how many miles you have
left. My Hyundai (48 TS-LFP260s) generally does better than 2 ah/mile.
Careful driving in warm weather might yield as much as 1.6 ah/m.
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