FLOODED LEAD-ACID BATTERY AND METHOD OF MAKING THE SAME

摘要

Positive active material pastes for flooded deep discharge lead-acid batteries, methods of making the same and lead-acid batteries including the same are provided. The positive active material paste includes lead oxide, a sulfate additive, and an aqueous acid. The positive active material paste contains from about 0.1 to about 1.0 wt % of the sulfate additive. Batteries using such positive active material pastes exhibit greatly improved performance over batteries with conventional positive active material pastes.

主权项

1. A method for making a flooded lead-acid battery comprising:
casting a plurality of positive electrode grids from a first lead-antimony alloy; casting a plurality of negative electrode grids from a second lead-antimony alloy, applying a negative active material paste to the plurality of negative electrode grids to form a plurality of negative plates, the negative active material comprising lead oxide; applying a positive active material paste to the plurality of positive electrode grids to form a plurality of positive plates, the positive active material paste comprising lead oxide, a binder, and a metal sulfate comprising a metal selected from the group consisting of tin, zinc titanium, calcium, potassium, bismuth, indium, and combinations thereof, wherein the molar ratio of lead to the metal in the positive active material paste is from about from about 450:1 to about 650:1; arranging the plurality of positive and negative plates in an alternating arrangement in a battery case with the positive and negative plates separated from one another by a plurality of separators; adding an aqueous electrolyte to the battery case; and applying a charge across the positive and negative plates, thereby forming the flooded lead-acid battery.