SEALED LEAD STORAGE BATTERY

摘要

PURPOSE:To prevent any lack of conductivity and any minute short circuits which might be caused by the use of a pulverized positive active material so as to increase the life of a sealed lead storage battery by using a separator having a double structure consisting of a positive-side layer with a given maximum hole diameter and a negative-side layer with a given maximum hole diameter. CONSTITUTION:A separator made of minute glass fiber has a double structure consisting of a positive-side layer and a negative-side layer. The maximum hole diameter of the positive-side layer is adjusted to 5-10mum and that of the negative-side layer is adjusted to 20-40mum. Therefore, even when a pulverized positive active material is used, the decrease in the conductivity of the positive active material can be suppressed by firmly holding it. Additionally, due to the small hole diameter of the separator, any permeation of minute particles of the active material into the separator is prevented. Accordingly it is possible to increase the life of a sealed lead storage battery by preventing any lack of conductivity and any minute short circuits.