A cylindrical, pure lead, lead-acid cell for float service

A cylindrical, pure lead, lead-acid cell was designed specifically for float service applications. Unique design features, including concentric, pure lead, circular grids, provide long life, reduced maintenance and improved safety. In excess of 150 000 cells are currently in use in a variety of Bell System applications. The cylindrical cells are optimally installed in a fiberglass-reinforced, modular battery stand. Evolution of the new cell design from pilot plant to large scale production demonstrated sensitivity of field float behavior to subtle changes in manufacturing processes. Analysis of interrelated float behavior and PbO 2 morphologies are discussed.