Posted on 11/21/2019 9:03:37 PM PST by ctdonath2
I agree with your analyses. My original point, though, was that a portable generator in the back of an EV is useless as a feasible method to extend its range.
On another thread, we were discussing the resale value of a Tesla needing a new battery pack, and somebody was talking about replacing everything with a conventional V8 and drivetrain.
I think you could have a pretty good unit if you took a cheap used hybrid, AWD version, needing a battery pack and replacing it with the minimum of cells or cells and mega caps...then bumping up the HP via a turbo or transplant...keeping all the electric drivetrain and controllers.
About 300HP ought to do it.
Probably both a mechanic and an electrician would need to collaborate on building this project.
It’s intentional.. They want the truck to look like what you might drive out of LA after an earthquake - - when the ‘homeless’ haven’t had their drugs for twenty-four hours... and assorted thugs can’t get their ebt cards to work.
Your project seems quite fun but challenging. Most hybrid transmissions don’t have a torque converter, and use the space to package the motor/starter windings. AWD also needs space for a transfer case and additional driveshaft. A conventional powerpack would need to have a place for the starter, which is always located outside the radius of the torque converter. This space is likely used up by other items, including locations for the driveshafts and half shafts. That’s quite a challenge.
The exhaust system has to go through all that space, too, and a turbo needs additional plumbing. After all that, the wiring might be quite easy since there would be less of it and it is not rigid. The good news is that the space where the battery pack was might give extra cargo capacity...if you can get to it.
Actually I was referring to electric cars/hybrids that have no transmission, but rather one motor per wheel, and electronic AWD.
In the case of a sporty car...if the motors could be located “inboard” and connected to the wheel hubs via conventional CV shafts,. the unsprung weight of the motors and brakes could be eliminated.
The easiest would be an existing hybrid with the above configuration, and add the turbo. The turbo may require additional clearance, but lots of the “tuner cars” guys out there have dealt with the limited space issue.
The turbo car would need larger diameter exhaust tubing.than stock.
So such a car with enhanced HP, reduced weight (less battery weight, no transmission, no torque converter, no brake calipers and rotors) would probably be quite the sports car or Autobahn sedan.
It would help if the donor vehicle didn’t look like a roller skate or refrigerator, but instead had some styling, otherwise, the various components could be lifted from junkyard denizen, and engineered into the sexy looking vehicle of your choice.
BTW...have you seen the youtube video where the guy builds a board of mega-caps on a piece of plywood and replaces the battery in his Honda? It repeatedly starts his car. (fact of fiction?)
That’s what made me start thinking about the quick-charge “battery” system.
It seems that since the capacitors (mega-caps) charge almost instantly, some specially crafted circuitry could allow them to slowly discharge into the voltaic cells and charge them back up.
This type of “battery” would make regenerative braking actually work.
(it’s probably already been invented)
Looks like you’ve got some great ideas. It would be interesting to put some in practice. I’m not so sure about the Honda mega-cap starter battery, though.
>> I’m not so sure about the Honda mega-cap starter battery, though. <<
I think this is the link:
Your link didn’t work, but I looked up similar ones and the videos were quite compelling. Cars can easily be started with super capacitors.
The problem I see, though, is lifetime complete replacement of a battery with them. To store the same amount of energy as a battery, a currently available super capacitor pack would weigh about a hundred pounds and occupy about 20 cubic feet of space. The super capacitors in the videos stored only a tiny fraction of the energy that batteries store. They simply can’t handle prolonged time between recharging, small draining during disuse, or alternator failure during driving. They would only keep the car running for a couple of minutes if the alternator failed at night.
I also found that it didn’t work.
The reason I brought your attention to the issue, was not for the purpose they were attempting, although one guy had a setup with a small 12V battery that would not start the car, but would recharge the caps in case you left the key on.
But I was thinking they would be good in a hybrid application, for bursts of power, or with their instant rechargability characteristic (on a buss with the voltaic cells) for true regenerative braking.
I don’t think I’d like to be around the number of caps you referenced, but I’m not that crazy about being around a bunch of deeply cycling batteries either....lead/acid or lithium ion.
The main purpose for the battery in my proposed project car would be simply for getting rolling from a dead stop, and to absorb or provide extra juice that would occur in the course of normal driving events....it may not be needed at all.
Another interesting lightweight energy storage devise, is the motor/generator flywheel (not my idea) It is a carbon fiber wheel, running at very high RPMs in a vacuum housing. The flywheel would connect through a reduction gearbox to the motor/gen and be revved up by applying juice (braking) or drawn upon by engaging the generator (starting from a dead stop)
Cite your source for “bulletproof” or I’ll ask the mods take down your post for “fake news”.
Do some research before making stupid threats to strangers based on your own ignorance.
Asking politely would have gotten you interesting videos and links on the subject from respected sources.
Making threats out of your own ignorance got you reported for abuse.
Promoting the truck as bulletproof is a LIE, WAB.
The post falsely claims that the truck is ‘bulletproof’, a term not used in Tesla’s own marketing. It was a marketing gimmick by Musk himself for which he lost $768M the day after the botched reveal.
It is LIE - I presume you cite FAKE NEWS since you refuse to submit source - and deserved of deleting your comment or the whole thread.
Before my first comment, I went to your link. Tesla itself: NOT A WORD ABOUT “BULLETPROOF”.
To-wit:
“ULTRA-HARD 30X COLD-ROLLED STAINLESS STEEL
If there was something better, we’d use it. Help eliminate dents, damage and long-term corrosion with a smooth monochrome exoskeleton that puts the shell on the outside of the car and provides you and your passengers maximum protection.”
“EXOSKELETON
Cybertruck is built with an exterior shell made for ultimate durability and passenger protection. Starting with a nearly impenetrable exoskeleton, every component is designed for superior strength and endurance, from Ultra-Hard 30X Cold-Rolled stainless-steel structural skin to Tesla armor glass.”
Reporting me for abuse for calling you out is a very liberal thing to do.
For the rest of us, if you want bulletproof, I submit the BMW X5 VR6.
It will be interesting to see how such a hard stainless steel works out. I have seen stainless used in automotive applications and it work hardens over time due to vibration and twisting and ends up cracking.
I also remember replacing late 70’s era aluminum frame rails in OTR trucks that cracked due to work hardening and improper initial heat treat. Not a fun job for the record. Hardness is not necessarily your friend in automotive applications.
From the following article:
“What’s interesting is that Musk claims the rest of the Cybertruck is bulletproof because it uses the same aerospace-grade steel used by his SpaceX rocket-building team for the body. In fact, I think Musk must have said “Cold-rolled 30X steel” 500 times since the Cybertruck’s unveiling. He really, really likes cold-rolled 30X steel. However, BMW claims that it’s tried using aerospace-grade steel for armor and, well, it didn’t turn out very well.
“One supplier offered us a supposedly bulletproof space flight material. But during the ballistics test, the $20,000 plate shattered into a thousand pieces.” said Daniel Huber, engineer for BMW armored vehicles.”
https://www.bmwblog.com/2019/11/27/bmw-mocks-tesla-cybertruck-with-its-own-bulletproof-x5/
And this is an interesting analysis of the body technique:
https://insideevs.com/news/384498/unusual-crash-tests-tesla-cybertruck/
Again, Asking politely would have gotten you interesting videos and links on the subject from respected sources.
Instead you attack, threaten, and tattle.
Where I live, nobody hauls anything in the rear bed of their new trucks these days..........They're 4wd phallic symbols.
Quit bothering us with junk.
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