Patent ID: 6495288
Filing Date: 2002-12-17
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A lead-acid battery comprising an electrolyte and a positive active material including tin in an amount of from not less than 0.5% to not more than 5% based on the weight thereof;wherein the density of said positive active material after formation is from not less than 3.75 g/cc to not more than 5.0 g/cc; wherein said led-acid battery is a valve-regulated lead-acid battery; wherein said lead-acid battery comprises a fine glass fiber separator containing a powdered silica having a specific surface area of from 50 to 500 m2/g added therein in an amount of weight not less than 30% to not more than 80% based on the weight thereof; and wherein said lead-acid battery is produced by a battery container formation method, and a time required between the injection of an electrolyte and the beginning of battery container formation is from not less than 0.1 hours to not more than 3 hours.