as it stands now, electric vehicles remain 'range limited' because they are 'charging time limited'. in many respects.
i am not here to propose an idea so that stock investors for tesla or some other fast charging stock bubble company can attack me. i am here to propose a legitimate new standard for quoting a statistic that remains at the very crux of the decision as to wether or not someone might conisder an electric vehicle of any sort.
to begin with, because electric motors with discharging batteries are efficient at accelerating per unit of waste heat they create----compared to combustion engines----the end result is that the low end acceleration is so efficient that the standard method by which the epa and dot use to create various driving 'profiles' for detrmining the mile per gallon of vehicles is not really relevant to electric cars.
the only profile you need to know about an electric car is how much juice it uses at a given continuous speed without acceleration. because an electric vehicle , electric scooter, bike or car---generally uses MORE electricity at higher speeds, ---designers of vehicles should consider explaining to people HOW MUCH electricity it being used at a given speed.
because car drivers are generally interested in high way speeds, you can use that as a top speed for measuring the energy consumption. I personally am interested in high speed electric bicycles which top out at 30 miles per hour.
NOW, once the consumption is determined at the speed, the final calculation is to determine how many MINUTES OF CHARGE are required to produce a MILE at that specific highway speed.
i call it " charge time per X minute mile"
for example . if my batteries charge 1 killowatthour in 5 minutes ( a 12 kilowatt charger would do this) , and 1 kilowattshour gets me 5 miles at a speed of 30 miles an hour ----than that is "1 minute per 2 minute mile"
this is a statistic which sounds a bit complex, but it is a very concise and DIRECT METHOD OF EXPLAINING TO PEOPLE HOW MUCH TIME IT WILL TAKE THEM TO BUY A CERTAIN SPEED QUALIFIED RANGE. it CONTAINS THE NECESSARY AND SUFFICIENT MEANING TO HELP YOU START COMPARING VEHICLES IN A VERY MEANINGFUL WAY.-- teslaberry, Aug 10 2014 You have to consider the source. Be flattered that he considered the occasion worthy of capitols at all.-- normzone, Aug 11 2014 Perhaps they weren't fixed on properly and all slipped down to the bottom when the screen got knocked?-- pocmloc, Aug 11 2014 Doesn't this get rather confusing if you use a super charger on the way to visit your relatives, a 110V 15A outlet while visiting, and a 220V 50A outlet once you get home?-- scad mientist, Aug 11 2014 OK! I'LL GET RIGHT ON IT.-- the porpoise, Aug 11 2014 It's also nonlinear. An empty battery will charge to 50% much quicker than it will charge from 50% to 100%.-- MechE, Aug 11 2014 //slipped down to the bottom
Well, they are much heavier. My laptop was half a kilo lighter when I formatted all the text files to lowercase.
Worst is when you do Japanese stuff, it's double-byte encoding, so all the capital kanji are 4 times the weight of regular lowercase Latin alphabet characters.
Thinking about it, surely it would depend on the viscosity of a halfbakery page? Then we could work out when teslaberry typed it...
Ok, here are some capital letters I typed at 00:40 JST (it's about 26 degrees C)...if someone wants to check tomorrow how far they are down the page that'd be handy.
J R I B E Y I S-- not_morrison_rm, Aug 11 2014 I'm kind of torn between many responses to this:
First is that most people would probably look at KWh per mile or Km, which allows a calculation of how much is it going to cost to go from A to B.
Second, the definition of the speed/ acceleration/ deceleration cycle could be defined for electric vehicles (ie wait 10 hrs to charge, coil up the connection, air con off, tyres at max pressure, 2 people and 3 beards). Then the energy consumption of the vehicles can be compared.
Third, if I have a super-capacitor that charges quickly, but is only capable of running the vehicle at fast speed for a very short distance, it would have a good "minutes per x minutes mile", but be a poor performer.-- Ling, Aug 11 2014 And I just thought of another non-linearity (well, two really). Obviously wind resistance is non- linear with speed, which means that a 1 minute per 2 minute mile is probably going to be about 4 minutes per 1 minute mile, so choosing to vary the speed is going to make the statistic questionable.
Also relevant, however, is that that non-linearity isn't linear between vehicles. A vehicle with horrible aerodynamics is going to suffer more as the speed increases, meaning that SUV producers are always going to rate at a lower speed.-- MechE, Aug 11 2014 mech-E. this is the whole point!!!!!!.
you give a car with 3 or 4 different speeds and then provide the minutes of charging per mile AT THAT SPEED. so you have an infographic for each car used to compare to other cars so you know how long it will take you to recharge as you travel.
of course-----you can also add the RANGE AT THAT SPEED. each speed yields different range .
thus, you have more of a realistic basis for comparison rather than the bullshit information they currently give you .-- teslaberry, Aug 11 2014 Okay, then that's not exactly clear from the idea as posted. I figured this was like MPG, which is a test done under a particular set of conditions.-- MechE, Aug 11 2014 I Y I S-- not_morrison_rm, Aug 11 2014 J R I B E Y I S-- rcarty, Aug 23 2014 Ô-- not_morrison_rm, Aug 23 2014 //graffiti
Sp. "Science"-- not_morrison_rm, Aug 24 2014 true, the aerosol spray can is a statement of level, science has delivered.
This idea is strange. It is like mixing the efficiency of your car with how fast you can pour gas in the tank. Though, I think everyone wants F1 fuel connectors. More time to read stories to the kids.
No one drives at a constant speed.-- wjt, Aug 25 2014 random, halfbakery