why can’t electric cars be charged by their own movement?
In: 14
Energy in may never be equal to energy out.
It’s a law of thermodynamics.
Converting electric charge to mechanical rotation isn’t perfect. There are always losses.
Reversing it also has losses.
100% power in battery. Only 70-ish% ends up being rotation.
If you tried to then turn rotational energy back into a charge, the car would have to stop moving. Because your rotation would go to 0, as charge comes back.
You start with either charge, or rotation. You MUST end with
either charge OR rotation, or half and half, or 70/30… something.
You may not have both. If you started with one, and ended with both, you’d need to have made more energy for no cost.
Add in those losses we mentioned earlier.
And 100% battery charge becomes 70% rotation 0% battery as the other 30% energy turns to heat, which you can’t get back.
Then that 70% goes to 49% battery, 0% rotation, as 30% goes ro heat again. You always lose.
Gas powered cars do this by consuming chemical fuel.
Latest Answers