PROCESS FOR AUTO-TESTING A FULLY DISCHARGED BATTERY, SUCH AS DOUBLE-LAYER CAPACITOR BATTERY, AND CIRCUIT FOR DOING THE SAME

摘要

A process for performing an auto-test of a fully discharged battery (130) of an electronic appliance including a battery charger (160), said process involving the steps of : performing (210) an initialization phase; charging (220) said battery (130) with a predetermined constant current during a predefined period allowing stabilization of said current (lcurrent); detecting (230) the voltage of said battery after said predefined period, said battery being still in charge; testing (240) whether said sensed voltage is comprised within a predetermined range of threshold values (V1, V2), and reporting a battery failure when said sensed value is outside said range. The invention is particularly adapted to the auto-test of a backup battery made of Electric double layer capacitors or any fully discharged backup battery.