The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 02, 1999
Filed:
Apr. 20, 1998
Patrick Kwok-Yeung Ng, Plano, TX (US);
Gary Jay Turner, Garland, TX (US);
A S Herbert, Richardson, TX (US);
Lucent Technologies, Inc., Murray Hill, NJ (US);
Abstract
An apparatus and method for initiating an intelligent battery discharge in an electrical system thereby allowing battery diagnostic testing to be performed more efficiently and more accurately. Specifically, the discharge is initiated by reducing the voltage being supplied to the electrical system by a main power supply such that the battery power supply begins supplying the system voltage. The output of the main power supply is only reduced to a predetermined non-zero level, such that the battery power supply will begin discharging while the main power supply continues to maintain a floor voltage. This floor voltage ensures that the system voltage will not fall below the floor voltage even if the battery power supply fails completely. Once the battery power supply begins discharging, the system voltage is monitored to determine whether the battery power supply is capable of supplying sufficient electrical power to maintain the system voltage above the floor voltage. If after a certain time the system voltage supplied by the battery power supply remains above the floor voltage, the voltage supplied by the main power supply is further reduced to allow for a deeper discharge of the battery power supply. The battery discharge is terminated either when the system voltage reaches a certain voltage level or once enough time has passed to obtain sufficient battery parameters in order to determine the condition of the battery power supply. The battery discharge is terminated by increasing the voltage supplied by the main power supply back to a normal voltage level for the electrical system, thus removing the need for the battery power supply to continue supplying the system voltage.