Method for charging an electrical energy storage unit and voltage converter

A method for charging an electrical energy storage unit, in particular installed in a vehicle, from a continuous charging terminal using a DC/DC voltage converter to adapt the voltage between said continuous charging terminal and said electrical energy storage unit said DC/DC voltage converter comprising at least two interleaved cells operating out of phase, each cell having respective switches;

• said method comprising a control by pulse width modulation of the switches of said DC/DC voltage converter with a duty cycle to adapt the voltage between said continuous charging terminal and the electrical energy storage unit, said duty cycle having a given value αv that is substantially constant over several consecutive interleaving cycles,
• wherein said duty cycle has said given value αv that is substantially constant, when the voltage of the electrical energy storage unit is greater than a first threshold and/or less than a second threshold, said thresholds being according to an operating range of the continuous charging terminal.