Motor How To Turn A Motor Into A Generator And Use It To Charge A Car Battery?

How to turn a motor into a generator and use it to charge a car battery? - motor

I plan to build an electric vehicle with regenerative braking and want to increase its range of travel.

Some people say that an engine and generator are basically the same.

But like a car alternator is not working is clean, even if connected to a car battery?

I think the electric motor that powers the four 12-volt batteries in series for a total of 48Volt.

What should I do in order to be able to immediately turn the motor-generator (in kinetic energy is converted into electrical charge
Battery) that the vehicle is in motion?

There is a need for some complicated circuit boards to do this?

If I do negative and positive connections to the engine when the vehicle is moving then change to recharge the batteries?