instead of believing
15kWh in 100kg is perfect for the job. An energy density that exists today.Graham
instead of believing
15kWh in 100kg is perfect for the job. An energy density that exists today.Graham
We don't use Fahrenheit or pounds of water either btw.
Graham
Yes, it's being released fom solution by the warming oceans.
Graham
Both are true, but they don't contradict my statement.
You don't need 1500Wh/kg to make a hybrid EV feasible. Jeez. That would give it ~
500 miles range without a recharge or even running the ICE !About 150Wh/kg will do nicely.
Graham
Not in Europe either. Nor even in Japan.
Until you realize that the electricity has to get to the electric motor somehow. Generation efficiency, transmission and distribution losses, and conversion losses all take their toll then.
Not odd at all. Up to 80% of that energy in gasoline is just wasted anyway.
And they don't contain > 150 kWh/kg either.
Graham
Hey, I've not foul mouthed you and I'd be obliged if you stopped that.
This design already contains all of the elements I've been talking about.
I do wish they'd chosen a larger vehicle though and maybe been a bit more serious instead of giving a Mini a crazy 640 bhp.
You'd need more than that for your "city car" serial-sometimes-hybrid to be practical, at least here in the YooEss. People expect a 4-500 mile range per "gas tank" of whatever sort. I don't see where you are getting your figures from, however - let's do the numbers again. Gasoline has about 700,000 BTU/gallon or 205 kWh/gal. a gallon weighs
8.3 lbs or 3.8 kg. So that's 53 kWh/kg. (wait, I screwed up something somewhere before, because I just ran through it again and that number seems different than I recall. But the point remains the same.)So to get a 400 mile range out of an average ICE-powered car, you'd need about 100 lbs or less of fuel. That contains as much energy as you'd get from approximately 4,500 lbs. of your batteries.
Or to put it another way, that's what would be needed for the idea of storing electricity on board to be as practical for the end user as simply running an ICE. Of course, in the real world, assuming that this magical energy density comes with the ability to charge and discharge quickly, you'd actually see some additional benefit from regenerative braking, but that would depend very heavily on maximum charge rate.
Or to put it a *third* way, since the Prius seems to be getting about the same gas mileage as some comparable Diesel cars, there's really ZERO advantage to all this extra complexity and monkey motion until we can make a significant decrease in the weight of our batteries, and/or dramatically increase their ability to take a fast charge to take advantage of regenerative braking, or both. Because I dunno about you, but when presented with two machines that are equally efficient, but one is half as complex as the other, I'll take the simple one every time. It's going to take a dramatic increase in gas mileage above and beyond what I can get out of a well-tuned ICE to make me take the plunge.
No, no it won't. Not unless you enjoy driving something like an overgrown golf cart.
nate
None of the above have to happen on the vehicle itself.
That's the unique strength of electric propulsion.
Graham
You're just arrogant and ignorant, which is a bad combination. I'll take foul mouthed over arrogant and ignorant any day.
nate
Or to not be one. The freedom to be idiotic or not does not seem to exist where you come from - either that or most of you have chosen to be idiots.
You're kidding right?
You're comparing a vehicle that gets 21 MPG to one that gets 40-60MPG?
That's double the gas burned. That means double the amount of tailpipe emissions.
Think about it.
Lee Iacocca said that was about when he had worked on a hybrid car design.
But everyday commuting *isn't* 500 miles.
All a hybrid needs is enough battery capacity to run its daily comuting run on the battery. Any more is wated capacity quite frankly. The idea obviously being to recharge off mains electricity at work, home or elsewhere.
The ICE only needs to kick in when a longer range is required and it'll happily cover as many miles as you care to provide fuel for.
Graham
Do they use them for controlling things like the engine control, ABS, and traction control computer or just for controlling the slower, less critical stuff, like the seatbelts and air conditioning? And wouldn't an MS OS contribute a lot of unneeded overhead and wasted ROM space?
My calculations show 400 miles would need 125 kWh.A 125kWh battery *would* weigh
850 kg. But you never need 125kWh of battery storage.You simply don't do those 400 mi on energy that was stored 'back at the ranch'. Depending on the scenario you top-up daily with mains electricity or generate your own as you drive when the battery starts to run 'dry'.
Graham
Because it's over complicated.
Graham
Look at the QED mini.
0-60 in 4.2 seconds. That's not golf cart performance.And it's a plug in hybrid.
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