by "shpuker" (shpuker)
Published 12/21/2017 at 05:00
by "shpuker" (shpuker)
Published 12/21/2017 at 05:00
Tags: EV
; Electric
; Vehicle
; Tesla
; i3
; BMW
; Pron
; Excessive Tags
; Honda
; When is enough enough?
; etc
STARS: 0
When Honda unveiled the EV-STER concept back in 2011 it was hip, unrealistic, and genuinely half-assed. Oh and it didn’t look anything like the car I just showed, because that’s what Honda decided to design instead, a 400+ HP 2.0L Turbo mid-engined sports car... And I think that’s stupid, here’s why.
Ok I don’t actually think it’s stupid, but I think Honda really could’ve turned the EV-STER into something truly great. First things first, this is the concept in question:
To reiterate their specs on it as well: 0-60 in ~5.0 seconds, 10 kWh battery pack, 100 mile range, top speed of 99 MPH. Now 100 miles of range is never going to catch on, especially not with the gearhead crowd, but what if we were to adjust their targets a bit and bring them up to 2017 capabilities?
First let’s make some assumptions that are almost certainly wrong:
Battery Pack
10 kWh (in 2011) Approximate Weight = 350 lbs
22 kWh (in 2020) Approximate Weight = 350 lbs
eMotor
Power output (2011) = 78 HP (Keep in mind, they said this would do 0-60 in 5 seconds)
Proposed eMotors = Two 90 HP individual wheel motors totaling 180 HP
Estimated curb weight
EV-STER in 2011 = 2,300
Some random number that I think is theoretically possible given carbon composite tech available now and other weight savings= 2,150 lbs
0-60 Times
EV-STER in 2011 = 5.0 sec.... Which is bullshit. I’d estimate it closer to 10 sec
My rough calculations of the car I’ve laid out = <5.0 sec
Electric range
EV-STER in 2011 = 100 miles, again this is bullshit. I would be amazed if it would’ve gone 100 km.
My magic car = ~ 110 miles
So there you have it, I’ve designed the car Honda couldn’t/wouldn’t/honestly probably didn’t feel like designing. Who knew launching an EV was this easy?...
Back to the main point I was trying to get at, would any of you even buy something like a 2,100 lb 180 hp RWD BEV? Not even just at this current moment, but at any point in time. Is the concept something that you’d consider? *Vote here so I know you care*
Disclaimer: A lot of assumptions were made, let me try and justify some... Oh yea and alcohol was definitely involved.
Battery weight estimate:
Honda didn’t publish their battery weight (nor vehicle weight for that matter) in 2011, so I’m assuming BMW’s battery tech on the i3 when it was rolled out was a a good deal ahead of it. Thus the i3's original 22 kWh battery pack is estimated at ~510 lbs best I could find (correct me if you want), so with some semi static mass from the housing and such that the 10 kWh pack comes in at around 350 lbs.
Similarly the 22 kWh estimate I gave uses an estimate that places the new 33 kWh pack in the i3 at ~450 lbs (which is optimistic, but not 0-60 in 5 seconds with 78 hp optimistic), so using the same maths we get roughly 350 lbs. Plus I wanted them to be the same, fight me.
Wheel Hub eMotors
Unsprung weight = bad, yes. But perfect torque vectoring = very good. Plus they’d weigh less overall.
Estimated Curb Weight
Current Honda S660 has a curb weight of ~1,900 lbs, so add on another 300 lbs from the EV powertrain and you’re at ~2,200 lbs. Add another 100 lbs from age and because I feel like it and there’s your 2,300 lbs.
My estimate of 2,150: Take away that 100 lbs from age, and another 50 from doing some clever weight shavings on the eMotor side of things that I refuse to describe, and there’s your 2,150 lbs.
EV Range
EV-STER: 100 miles out of 10 kWh is just never going to happen in car.
My estimate: Pretty optimistic still, but it’s somewhat realistic. It’d have the same capacity as the initial i3, but be about 20% lighter. The initial i3 had a range of around 80-90 miles, so 110 with this setup isn’t out of the question. Plus wheel motors let you get a bit more aggressive with the regen braking in theory, so it’s possible.
...
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"Chinny Raccoon" (chinnyraccoon)
12/21/2017 at 05:36, STARS: 0
Wasn’t this a preview of the S660, but with typical concept car embellishment?
180HP in about a ton is a healthy amount.
"kanadanmajava1" (kanadanmajava1)
12/21/2017 at 05:54, STARS: 0
Your have one unit problem there. Honda gave the acceleration estimate with a bit confusing range. It was 0-60 km/h (37.5 mph) that took 5 seconds.
"xyzabc" (stackofoldwood)
12/21/2017 at 07:28, STARS: 3
He’s the world’s best “Sport Electric Vehicles”.
You run them as long as you want....or until your Mom tells you it’s time for dinner.
"bhtooefr" (bhtooefr)
12/21/2017 at 08:24, STARS: 0
My guess is that 100 miles on 10 kWh was on JC08 cycle, which is an absolute joke, just like how NEDC is an absolute joke.
"BaconSandwich is tasty." (baconsandwich)
12/21/2017 at 16:18, STARS: 1
Toyota’s concept department would like to be represented here too:
https://en.wikipedia.org/wiki/Toyota_concept_vehicles,_2000%E2%80%9309#Alessandro_Volta
I do think 100 miles from a 10 kWh is incredibly optimistic.
"shpuker" (shpuker)
12/21/2017 at 20:45, STARS: 1
As much as I love that concept, it isn’t all electric! Disqualified.
*But actually, they need to make that car*