METHODS OF MANUFACTURING ROLLED LEAD ALLOY SHEET FOR LEAD STORAGE BATTERY, POSITIVE ELECTRODE PLATE FOR LEAD STORAGE BATTERY AND LEAD STORAGE BATTERY

摘要

PPROBLEM TO BE SOLVED: To solve a problem about a positive electrode plate for a lead storage battery becoming short-lived with degradation of the positive electrode made of a rolled lead alloy sheet in which minute peelings of a Pb-Sb-Ag alloy are generated to cause breakage of a grid bone or generation of cracks during expanding works, when a surface layer of the Pb-Sb-Ag alloy is integrally formed by a rolling work on the surface of a rolled lead alloy sheet for an expanded positive electrode of the lead storage battery of a Pb-Ca alloy. PSOLUTION: When a Pb-Sb-Ag alloy sheet is laminated on a Pb-Ca alloy sheet to be integrated, let a thickness of the Pb-Ca alloy sheet be t1 and a thickness of the Pb-Sb-Ag alloy sheet be t2. In a rolling work by a roller immediately after laminating the two sheets, let a thickness of the rolled lead alloy sheet immediately after passing through the roller be T. A ratio K (=T/(t1+t2)) is 0.55 and 0.83. PCOPYRIGHT: (C)2010,JPO&INPIT