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ThanatosSigma
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23 Jun 2012, 11:34 am

Anyone notice how crappy electric cars are? I think I know how to make one that is not so bad, when you need to charge up, instead of plugging in a wire, you attach a belt that feeds in small batteries, and pulls out the old, like a chain gun with batteries instead of bullets.

:-)



Fogman
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23 Jun 2012, 11:45 am

ThanatosSigma wrote:
Anyone notice how crappy electric cars are? I think I know how to make one that is not so bad, when you need to charge up, instead of plugging in a wire, you attach a belt that feeds in small batteries, and pulls out the old, like a chain gun with batteries instead of bullets.

:-)


And what do you do with the old batteries?


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brickmack
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23 Jun 2012, 12:15 pm

Plus, considering how much power would be required to move a car weighing hundreds of pounds, plus the radio and other electronics, that will take a lot of batteries. Which would cost a lot. What I think would work well is if they made one big battery (well probably several small batterys connected) that is rechargable and easily removable from a car, and can be used in all models. Then instead of spending hours charging thr car, just go to a place where you could take out your battery, put in a freshly charged one, and they charge the dead one and give it to the next person. Like a gas station, but with batteries.



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23 Jun 2012, 12:43 pm

brickmack wrote:
Which would cost a lot. What I think would work well is if they made one big battery (well probably several small batterys connected) that is rechargable and easily removable from a car, and can be used in all models. Then instead of spending hours charging thr car, just go to a place where you could take out your battery, put in a freshly charged one, and they charge the dead one and give it to the next person. Like a gas station, but with batteries.


The problem here is that there are no standards for electric cars, everything is proprietary and probably will be for at least the next 10 years or so until the technology is sorted out. --Remember the 'Format Wars' with VHS an BetaMax?

Still though. it's a viable idea, but as of yet the major players in electric cars are still caught up in their own technological development.


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ruveyn
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23 Jun 2012, 12:54 pm

Fogman wrote:

And what do you do with the old batteries?


There are methods of safe disposal. And some of the material can be recycled.

Any such disposal regime will add to the cost of batteries.

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ThanatosSigma
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23 Jun 2012, 1:17 pm

They would be recharged, then fed in again later..... like a gas station, but batteries instead charged in, discharged empty batteries are fed into magazine chargers.



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23 Jun 2012, 3:05 pm

ThanatosSigma wrote:
They would be recharged, then fed in again later..... like a gas station, but batteries instead charged in, discharged empty batteries are fed into magazine chargers.


There are recharging stations in countries where electric cars are more common. Unfortunately, the batteries take a long time to charge, so a better solution would be to have stations where the empty batteries can be swapped out for full batteries, which can then be recharged for other customers.



ThanatosSigma
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23 Jun 2012, 3:17 pm

That is the idea silly.

Load in charged small cell batteries with one side, pull out empties, fill rack, when rack is fully charged, repeat.



ruveyn
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23 Jun 2012, 5:03 pm

ThanatosSigma wrote:
They would be recharged, then fed in again later..... like a gas station, but batteries instead charged in, discharged empty batteries are fed into magazine chargers.


Battery exchange (discharged removed, charged installed) is clearly the most convenient method. The discharged batteries can be recharged and there is no waiting required for the driver who needs a new charge. In order for this system to work the recharge rate has to be somewhat larger than the discharge rate.

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brickmack
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23 Jun 2012, 5:56 pm

Fogman wrote:
brickmack wrote:
Which would cost a lot. What I think would work well is if they made one big battery (well probably several small batterys connected) that is rechargable and easily removable from a car, and can be used in all models. Then instead of spending hours charging thr car, just go to a place where you could take out your battery, put in a freshly charged one, and they charge the dead one and give it to the next person. Like a gas station, but with batteries.


The problem here is that there are no standards for electric cars, everything is proprietary and probably will be for at least the next 10 years or so until the technology is sorted out. --Remember the 'Format Wars' with VHS an BetaMax?

Still though. it's a viable idea, but as of yet the major players in electric cars are still caught up in their own technological development.

Yea I suppose. Though until you brought it up I had never heard of Betamax. Too young for the reference I guess...



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23 Jun 2012, 8:45 pm

In older electric cars, the cells were packed in any crevice where they would fit so this wouldn't work. In the Tesla Model S, they are all stored in a "slab" on the bottom of the car, which would make this more feasible, but the slab is designed for quick release and removal by compatible equipment. Because of that, it's faster to just release the whole battery pack than to feed individual cells out of it. Nice thinking though.

Electric cars are far superior to gasoline powered, except this issue



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23 Jun 2012, 9:18 pm

There are some neat concepts that you could run an induction strip down the middle of the road that could deliver power to you as you drive. Unfortunately, induction schemes generally have low efficiency. Another idea would be to have some sort of arm on your car that could reach up to wires running above the road, sort of like how street-cars work. I believe there is a pilot project that will begin in the next few years in California using this with freight trucks (although why on Earth they don't just use rail in this particular case is beyond me, since the trucks will only be able to run along a very specific route). The battery swap-out scheme is a good one but unfortunately we don't hear anything much about it right now. A big problem is the lack of standardisation, as someone else mentioned. And that's hard to fix--look how long it took us to even get standardized cell-phone chargers.

Of course, it's worth noting that when you take into account all of the environmental damage caused by manufacturing batteries and digging up the metals needed for them, electric cars might actually be worse for the environment than conventional ones.



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23 Jun 2012, 9:21 pm

I was thinking about this earlier today, why not have a car with an electric motor on each wheel, but instead of batteries have them be powered by a gas/diesel/whatever generator, kind of like one a train. You could have as much hp as on a sports car, on what I guess counts as a hybrid.


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MyFutureSelfnMe
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23 Jun 2012, 9:44 pm

Titangeek wrote:
I was thinking about this earlier today, why not have a car with an electric motor on each wheel, but instead of batteries have them be powered by a gas/diesel/whatever generator, kind of like one a train. You could have as much hp as on a sports car, on what I guess counts as a hybrid.


Uh, you pretty much just described a hybrid, minus the direct drive from engine to wheel (do all hybrids even have this?). The only value to a hybrid is to avoid charging issues. Charging issues should only be a problem for a few more years.



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23 Jun 2012, 9:47 pm

MyFutureSelfnMe wrote:
Titangeek wrote:
I was thinking about this earlier today, why not have a car with an electric motor on each wheel, but instead of batteries have them be powered by a gas/diesel/whatever generator, kind of like one a train. You could have as much hp as on a sports car, on what I guess counts as a hybrid.


Uh, you pretty much just described a hybrid, minus the direct drive from engine to wheel (do all hybrids even have this?). The only value to a hybrid is to avoid charging issues. Charging issues should only be a problem for a few more years.


I thought hybrids alternate between running off of battery powered electric motors, and switched to a small gas engine when more power was needed or the batteries died.


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23 Jun 2012, 10:19 pm

MyFutureSelfnMe wrote:
In older electric cars, the cells were packed in any crevice where they would fit so this wouldn't work. In the Tesla Model S, they are all stored in a "slab" on the bottom of the car, which would make this more feasible, but the slab is designed for quick release and removal by compatible equipment. Because of that, it's faster to just release the whole battery pack than to feed individual cells out of it. Nice thinking though.

Electric cars are far superior to gasoline powered, except this issue


The only problem is the Model S uses the battery pack as an integral member of the frame of the car - so making it removable would compromise that ability greatly.


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