AUTOMATIC VARYING RATE BATTERY CHARGER UTILIZING TRANSISTOR LATCHING MEANS IN VOLTAGE SENSING CIRCUIT
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Abstract
AN AUTOMATIC VARYING RATE BATTERY CHARGING CIRCUIT INCLUDING A SILICON-CONTROLLED RECTIFIER, THE CONDUCTION OF WHICH IS EFFECTIVELY DETERMINED BY THE VOLTAGE LEVEL OF THE BATTERY. THE CIRCUITRY COMPRISES A VOLTAGE DIVIDING NETWORK AND A TRANSISTOR HAVING ITS EMITTER AND COLLECTOR ELECTRODE SHUNTED ACROSS A RESISTOR OF THE VOLTAGE DIVIDING NETWORK TO INSURE THE CONDUCTION OF THE CONTROLLED RECTIFIER. A ZENER DIODE CONNECTED AT ITS CATHODE TO THE VOLTAGE DIVIDING NETWORK ITS USED TO INSURE, THROUGH A SECOND CONTROLLED RECTIFIER, THE TAPERING OF A HIGH CHARGE CURRENT APPLIED BY THE CIRCUIT TO THE BATTERY WHEN THE BATTERY REACHES A POINT OF GASSING. AT A MAXIMUM CHARGE VOLTAGE LEVEL OF THE BATTERY, THE FULL CONDUCTION OF THE ZENER DIODE CAUSES, THROUGH THE SECOND CONTROLLED RECTIFIER, THE COMPLETE CUT-OFF OF THE HIGH CHARGE CURRENT. A LOW OR TRICKLE CHARGE CURRENT IS SUPPLIED TO THE BATTERY THROUGH A SERIES CONNECTED RESISTOR DIODE WHEN THE HIGH CHARGE CURRENT HAS BEEN CUT OFF.
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Current AssigneeJohn C. Lesher
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Original AssigneeJohn C. Lesher
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InventorsLesher, John C.
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Application NumberUS04/682,091Time in Patent Office1,149 DaysField of SearchUS Class Current320/143CPC Class CodesH02J 7/00719 in response to degree of ga...
