LEAD-ACID BATTERY AND MANUFACTURE THEREFOR

摘要

PROBLEM TO BE SOLVED: To restrain a short circuit of a positive electrode plate and a negative electrode member such as a negative electrode strap part by elongation of the positive electrode plate of a plate group end plate and sudden reduction in lead-acid battery capacity thereby in a lead-acid battery constituted so that the negative electrode plate number for constituting a plate group of the lead- acid battery is the same number or smaller by one sheet than this. SOLUTION: In a lead-acid battery having the constitution, the lead-acid battery is characterized in that a positive electrode grid body has an expanded grid body formed by unfolding/extending in the sheet width direction after alternately extending in the vertical direction to a sheet surface simultaneously when forming a slit in a rolled sheet of a lead alloy, and the lead alloy includes Sn by 0.5 wt.% to 2.0 wt.%.