CHARGING METHOD FOR LEAD-ACID BATTERY

• Main Author: YONEZU KUNIO
• Format: Patent
• Language: English
• Published: 20.02.1996
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PURPOSE:To control the positive electrode potential to be within a specified range during charging, and enhance life performance with a positive plate suppressed in elongation by dividing the charging area into four areas, and thereby specifying a relation between each terminal voltage and charging time in each divided area. CONSTITUTION:The charging of a lead storage battery employing a lattice made of a lead-calcium alloy as a positive plate is carried out by dividing its charging area into four areas A through D. In the area A, charging is carried out at constant current or semi-constant current, and the terminal voltage is increased as time elapses. In the area B, charging is carried out at constant current or semi-constant current, and specified voltage V1 is kept constant for the specified period of time T1. In the area C, charging is carried out at constant current or semi-constant current, and specified voltage V2 is kept constant for the specified period of time T2. A relation between each terminal voltage and the period of time for charging in the areas A through C is set to be V1<V2, and T1<T2. By this consttution, positive electrode potential is controlled to be less than a definite limit, a positive plate is made small in elongation, and life performance is thereby enhanced.