Rechargeable Brakes

Its common knowledge that electric cars need charged, and rechargeable brakes are nothing new, but as far as I know they simply recharge when you lift of the ‘gas’ or just slightly brake. This idea uses a CV gearing mechanism (like a potters wheel or the variable belt drive used on early Volvos or the newer Honda CRVs ???) between the road wheels and a generator. When the driver bakes the system is activated at say a 1:1 ratio but as the braking force needs to be increased so is the ratio thus constantly increasing the RPM of the generator and creating more charge whilst slowing the vehicle down. However traditional brakes would have to be activated once the CV system has reached its highest ratio and / or the generator is spinning beyond the speed of the car (a ratchet would be incorporated so it wouldn’t stop when the car stops). It would be like down shifting in a regular car, but at a constantly increasing rate.