SEALED ALKALINE STORAGE BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a sealed alkaline storage battery in which an electrolyte liquid holding rate of a separator can be improved even where pressure is applied to the separator. SOLUTION: A separator comprising nonwoven fabric is formed by mixing polyproypylene fibers of an average fiber diameter of 2-8μm with polypropylene fibers of an average fiber diameter of 15-30μm. The polypropylene fibers of the average fiber diameter of 2-8μm are included by 20-50wt.% to the nonwoven fabric. A positive electrode plate and a negative electrode plate are wound through a separator to form an electrode plate group. The electrode plate group is disposed in a battery jar to be pressurized by force of 2-6kg/cm<2> in a thickness direction. Electrolyte comprising potassium hydroxide solution is injected into the battery jar to set an electrolyte liquid holding rate of the separator at 150% or more.