[dubbau]

I see that this hasn't been talked about lately I wanted to see if you have some more information.

My thought is that I have 2 electrical circuits 2 EV batteries and a smart system to run/drive the car off of one battery and recharge the second battery using geared alternators attached to two of the wheels not being used to propel the car. I could also gear the alternators to spin 20-40 times the revolutions of the front wheels much like is done with a servo motors to other equipment.

Why would this setup not work? I understand you would have to be able to recharge the second batter as fast as you could dissipate the first one. Saying that could be done the smart system would switch batteries to now drive off the recharged second battery and now recharge the first.

I'm perplexed on why this would not work...

[Ziggythewiz]

Originally Posted by dubbau

I'm perplexed on why this would not work...

Go open a door. Then close it and have a friend pull against it as hard as they can. Now open it again. How well did that work?

Now you pull and have your friend try to open the door.

You and your friend are batteries. What you are proposing is equivalent to you and your friend taking turns fighting each other to open the door...in an effort to make the door easier to open. Is it?

[dubbau]

I see your point I must be missing something with the physics I just though of a external circuit that wouldn't draw on the first would some what work I mean even if you could not recharge the entire battery (Same amount of energy spent to make the momentum) you would at the least extend the range by some percentage...

[jeremyjs]

Originally Posted by dubbau

I see your point I must be missing something with the physics I just though of a external circuit that wouldn't draw on the first would some what work I mean even if you could not recharge the entire battery (Same amount of energy spent to make the momentum) you would at the least extend the range by some percentage...

There's no such thing as free energy. It has to come from somewhere and you never get it back at 100% efficiency. You would be taking power from one battery pack and transferring it to the second battery pack minus the energy you used just to move the car and the inefficiencies of your alternators putting drag on the car.

You could use regen and get some of the braking energy back, but that's it. Many hybrids and ev's already use regen to recover breaking energy. Basically, instead of transferring all your momentum to heat in the brakes it uses the ac motor as a generator when stopping to transfer some of the energy back into the batteries.

Look up conservation of energy. You should probably refrain from making any more posts until you understand it, but that's up to you.