Managing an installation for charging electric motor vehicle batteries in a parking lot

Abstract

The invention relates to a method for managing charging currents delivered by an installation () for charging electric vehicle batteries in a parking lot (P), comprising a set of electric charging terminals (B, . . . B) connected to an electric power distribution network (), each terminal being able to deliver a charging current value to an electric vehicle (VE, . . . VE) connected thereto. The method comprises: determining a maximum permissible value of the current at a connection point () for connecting the installation () to the network (); storing, in a central management system () linked to the terminals, on the one hand, the electric charging terminals of a first subset of said set corresponding to the occupied terminals and, on the other hand, the electric charging terminals of a second subset corresponding to the available terminals; measuring the sum of the charging currents delivered by the terminals of the first subset; computing, by the system (), an available current value according to a difference between the maximum permissible value and the sum of the delivered charging currents; and, for each new electric vehicle entering the parking lot (P) for charging purposes: computing, by the system (), a deviation between the computed available current value and a charging current value able to be delivered by a determined terminal of the second subset; if the deviation is negative, transmitting, to one or more terminals selected from the first set, an order to reduce the charging current value delivered by each terminal to the vehicle connected thereto, so as to cover the deviation in absolute value; and transmitting, to the determined terminal of the second subset, an authorization message for charging the new vehicle at a predetermined charging current value.