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 of an electronic appliance including a battery charger, said process involving the steps of :
performing an initialization phase;charging said battery with a predetermined constant current during a predefined period allowing stabilization of said current (Icurrent);detecting the voltage of said battery after said predefined period, said battery being still in charge;testing whether said sensed voltage is comprised within a predetermined range of threshold values (V1, V2), andreporting 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.

主权项

1. A method of auto-testing a fully discharged battery of an electronic appliance that includes a battery charger, comprising:
configuring a circuit to test any one of a lithium-ion, nickel-cadmium, and electric double-layer capacitor type battery used in an electric appliance; performing an initialization phase; charging the battery with a predetermined constant current during a predefined period having a duration that allows stabilization of the current; detecting a voltage of the battery after the predefined period, while the battery is still being charged; determining whether the detected voltage is within a predetermined voltage range; and reporting a battery failure responsive to the detected voltage being outside the predetermined voltage range.