Control Method for a unit of electric propulsion engine of a vehicle.

According to the invention, after a request for acceleration is made by moving the accelerator (9), and in order to then satisfy the supply of an overall power input to the electric motor (3), data relative to said power input (Icharge) are collected, which are supplied at the input of a transfer function (23) in order to provide, via a subtracter (25), an order for supplying power by means of an ultracapacitor (7a), the electrochemical battery (7b) completing the input of the ultracapacitor in order to reach the overall power input.