This invention relates to a control method and system for the charging of a battery of a vehicle. This control method manages a diagnostic device and a battery charger. After a connection step, the control method requests the parameters of the battery of the vehicle, receives them via the intermediary of the diagnostic device and configures the battery charger to charge the battery of the vehicle, the step of configuring comprising a step of establishing a charging model according to the received parameters of the battery of the vehicle. The control method has the ability to charge all the batteries of existing vehicles with the correct charging parameter according to the battery of the vehicle, without loss of time.