ElectricMotorcycleForum.com

  • January 19, 2018, 07:43:42 AM
  • Welcome, Guest
Please login or register.

Login with username, password and session length
Advanced search  

News:

Electric Motorcycle Forum is live!

Pages: 1 [2]

Author Topic: Other EVs: Tesla Truck and Roadster 2.0  (Read 565 times)

grmarks

  • Sr. Member
  • ****
  • Posts: 394
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #15 on: November 18, 2017, 08:29:50 AM »

I disagree, its most likelt Tesla's new cells (in the model 3), look at how hight the door sill is, my gues is 2 layers of batteries under the back seats, 1 layer under the front seats. No one has solid state batteries yet. 
Logged

NEW2elec

  • Hero Member
  • *****
  • Posts: 601
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #16 on: November 18, 2017, 09:27:02 AM »

Can't be.  A 100D model S is over 5000lbs this car would be 6500-7000 lbs with double the standard Li-ion cells even with carbon fiber panels and less room.  That thing couldn't corner worth a damn or have a 1.9 0-60 time even with a rocket engine at that weight.

No one has solid state batteries (out) yet.  This is for 2020.
« Last Edit: November 18, 2017, 09:42:21 AM by NEW2elec »
Logged

Doug S

  • Hero Member
  • *****
  • Posts: 1126
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #17 on: November 18, 2017, 10:30:27 AM »

All very speculative, but I'm guessing grmarks is right. The motor(s) for this car are very small compared to an ICE car, there might not be much if any trunk space on a "roadster", so there might be plenty of space even in such a small car to double, triple, even quadruple up in places. Also, Tesla has invested f-tons of money into their 18650 cell. I doubt they're going to abandon them. The cylindrical cells are also pretty easily water-cooled, which a high-performance EV needs.

And I'm not sure the capacity has to be 200+ kWh either. It's a tiny car, so very small frontal area, and I'm sure the drag coefficient is at least somewhat lower than any car they've built to date. In the name of performance, they've also undoubtedly optimized everything for low resistance current paths, which lead to high efficiency. Who knows how far 150 kWh could take a car that size, that clean and that efficient?
Logged
There's no better alarm clock than sunlight on asphalt.

NEW2elec

  • Hero Member
  • *****
  • Posts: 601
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #18 on: November 18, 2017, 11:35:21 AM »

From Elon's mouth "200kWh battery" paraphrased "ample storage space" also a 2+2ish cabin not a true roadster.
Tesla is already past the 18650 for a 2170 cell.  Even if they are much better than the 18650's the size and weight just couldn't work in this car.  Not to mention the discharge rate to for that quick jump and the heat for 250+ MPH I just don't think anything they use now could take it.
Logged

Shadow

  • Tip Overs: 10
  • Global Moderator
  • Hero Member
  • *****
  • Posts: 704
  • Zero 2016 DSR ZF13.0
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #19 on: November 18, 2017, 12:42:31 PM »

Watched it. Interesting. Moved topic to /News.
Logged

Richard230

  • Hero Member
  • *****
  • Posts: 4991
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #20 on: November 18, 2017, 09:08:19 PM »

I just saw a TV news story about Tesla's all-electric big-rig semi-truck.  The report said that it would be able to travel for 500 miles, carrying a 80,000 pound load at 55 mph on one charge.  And it would also be able to maintain 65 mph uphill, fully loaded, and its 0-60 time would be twice as fast as a diesel-powered big rig. It seems doubtful to me that they would be able to get that kind of performance and apparent power density from the cells currently being manufactured in their new "gigafactory".  ???

Frankly, I am amazed at those claims.  :o  Can you imagine the amount of battery power that truck must be carrying, what the batteries must weigh and how long they would take to charge, or what kind of infrastructure it would take to charge them quickly (downtime is really important to a trucking company)? 

The news report said that Walmart had already ordered 15 of Tesla's new trucks, even though no purchase price for the truck has yet been announced.
Logged
Richard's motorcycle collection:  2018 16.6 kWh Zero S, 2016 BMW R1200RS, 2011 Royal Enfield Bullet 500 Classic, 2009 BMW F650GS, 2005 Triumph T-100 Bonneville, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior.

Alan Stewart

  • Full Member
  • ***
  • Posts: 178
  • Electric Transportation Enthusiast
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #21 on: November 19, 2017, 01:41:22 AM »

Compare the original Tesla Powerwall (18650 cells) versus the new Powerwall 2 (2170 cells and next generation packaging):

6.4 kWh vs. 13.5 kWh (2.1x)
214 lbs vs. 265 lbs (1.24x)
12,558 cu in vs. 8,207 cu in (0.65x)
$3000 vs. $5500 (1.83x)

More than twice the capacity, only a quarter heavier, only two thirds the volume, and cheaper per kWh too. It’s obvious how the 200 kWh Roadster battery is possible. (Though some of the volume difference is due to the change to rectilinear form instead of the original more curvilinear design.)
Logged
Alan
2014 Nissan Leaf, Tesla Model 3 reservation

42Cliffside

  • Jr. Member
  • **
  • Posts: 66
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #22 on: November 20, 2017, 03:32:08 AM »

Quote
Can you imagine the amount of battery power that truck must be carrying, what the batteries must weigh and how long they would take to charge

-I've seen estimates of 800kWh on board smaller options avail

-400 miles in 30 min as your truck loads/unloads or at other MegaCharger stations

-1.6MWh charger at a promised price of $0.07/kWh sourced green for tesla trucks

https://cleantechnica.com/2017/11/17/tesla-semi-8-charger-holes-800-kwh-battery-tesla-megacharger-1-6-megawatts/


as for ease of maintenance, here is the Entire drive train, 2 engines/gearboxes per axle unit. Super clean for a manufacturing prototype.

« Last Edit: November 20, 2017, 03:57:27 AM by 42Cliffside »
Logged

ESokoloff

  • Full Member
  • ***
  • Posts: 129
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #23 on: November 20, 2017, 04:54:55 AM »

Yeah the race specs are great and all but do you see what I see?

The thing has a 200 kWh battery!
In that tiny package!
Has to be solid state batteries!

It's all coming together.

I'm guessing this pre-production car does not have Solid State battery's as those are a few years out.
Logged
Eric
2016 Zero DSR

NEW2elec

  • Hero Member
  • *****
  • Posts: 601
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #24 on: November 20, 2017, 06:45:17 AM »

I'm only using critical thinking here.  I was under the impression the S already used the 2170 cells.
So doubling that battery weight would have killed the roadster.  If they can get a 200kWh in that small space with just their 2170 cells (that are cheaper) why in the world are they not in the S and X models now.  If you can get 200 in the roadster put 500 in the S already, it's R&D is done just throw in those new cells.

It was for that reason that I feel the roadster has more advanced cells than even the 2170s.

And for the record I want one very very much.  I did click the "reserve one" button but backed out since I figured I would have to live in it.
Logged

Alan Stewart

  • Full Member
  • ***
  • Posts: 178
  • Electric Transportation Enthusiast
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #25 on: November 20, 2017, 08:59:46 AM »

Than Model S and X still use 18650 cells. as I recall improved packaging and cooling made the 100 kWh versions possible. The Model is the first car to use the new 2170 cell.
Logged
Alan
2014 Nissan Leaf, Tesla Model 3 reservation

Doug S

  • Hero Member
  • *****
  • Posts: 1126
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #26 on: November 20, 2017, 08:59:31 PM »

And for the record I want one very very much.  I did click the "reserve one" button but backed out since I figured I would have to live in it.

lol I was telling my gf about it this weekend, and she (not surprisingly) said she just didn't understand the need for that much power and torque when the top speed allowed just about anywhere in the US is 75 mph.

Of course she's right. And of course that doesn't mean I don't want one. But yea, it might have to wait until I earn my fifth million bucks or so.
Logged
There's no better alarm clock than sunlight on asphalt.

NEW2elec

  • Hero Member
  • *****
  • Posts: 601
    • View Profile
Re: Other EVs: Tesla Truck and Roadster 2.0
« Reply #27 on: November 27, 2017, 07:57:36 AM »

For the record Bloomberg thinks something is up too.

Search for this article:   Tesla’s Newest Promises Break the Laws of Batteries

Logged
Pages: 1 [2]