LEAD STORAGE BATTERY

摘要

PROBLEM TO BE SOLVED: To make it possible to give a lead storage battery a longer life by suppressing voltage drop during high-rate discharge and suppressing deformation of the electrode plate. SOLUTION: A positive electrode current collector of an electrode plate for lead storage battery is formed by powder-rolling lead alloy powder having superior corrosion elongation performance than that of the conventional casting rolled material. The powder rolling material has a texture composed of crystal grains oriented in a specific direction having an aspect ratio of 3 to 13. The current collector is manufactured in such a manner that the tin concentration in alloy reduces as separating from the ear part. The tin concentration reduces at least in two stages. COPYRIGHT: (C)2010,JPO&INPIT