Abstract: The present invention relates essentially to a recharging device of a storage system for electric power from a power network, said storage system being used as a power source for electric or hybrid vehicle, said system comprising: a first storage element of electrical energy (1), specifically a battery, and a second storage element of electrical energy (2), specifically a pack of supercapacitors, a DC-DC power converter (3) being arranged between said first element and second element, said first element having a first voltage, and said second element having a second voltage which may exceed said first voltage, wherein said device comprises: a voltage rectifying device (5) connected on the one hand by an electrical connection to the converter (3) on the side where it is connected to the second element, and also connected by a removable electrical connection to the network supply, said device being adapted to rectify the alternating voltage delivered by the network to a DC voltage in the range of operation o