Patent ID: 7034506
Filing Date: 2006-04-25
Classification: H02J

Abstract:
1. An emergency lighting equipment with an automatic battery charge/discharge and monitoring system for providing emergency illumination when an alternating current (ac) power source stops providing an ac voltage, the emergency lighting equipment comprising: an operating module control circuit coupled to the ac power source for receiving and re-transmitting the ac voltage and outputting an operating mode signal; a rectify/voltage-divide and voltage regulation circuit coupled to the operating mode control circuit for converting the ac voltage from the operating mode control circuit to a direct current (dc) voltage; a battery for holding electric energy; a main control unit coupled to the battery, the rectify/voltage-divide and voltage regulation circuit and the operating mode control circuit for receiving the operating mode signal from the operating mode control circuit and the dc voltage from the rectify/voltage-divide and voltage regulation circuit, determining the current operating mode according to the operating mode signal, determining if the ac power source still provides an ac voltage according to the dc voltage and charging or discharging the battery accordingly, and furthermore, discharging the battery if the ac power source has provided an ac voltage continuously for a preset period of time during which there is no battery discharge; and an illuminating apparatus coupled to the main control unit and the battery, wherein the illuminating apparatus is triggered when the battery discharges and the illuminating apparatus is shutdown by the main control unit when the battery is over-discharged.