MANUFACTURING METHOD OF LEAD-ACID BATTERY, AND PASTE TYPE NEGATIVE ELECTRODE PLATE FOR LEAD-ACID BATTERY

摘要

PPROBLEM TO BE SOLVED: To provide a long-life lead-acid battery hardly generating hydrogen during use with superb charging acceptance characteristics of a negative electrode plate, even in case graphite powder particles with a function of lowering hydrogen overvoltage is added to a negative electrode active material. PSOLUTION: The negative electrode plate for the lead-acid battery is a paste type one containing lignin and graphite powder particles in the negative electrode active material. This type of lead-acid battery is the subject matter. The lignin exists as a thin layer (to be 0.05 to 0.15% by mass to a graphite mass) on a surface of the graphite powder particles and also exists in dispersion in the negative electrode active material. In manufacturing of the paste type negative electrode plate, preparation of the paste-state negative electrode active material to be filled in a negative electrode collector is carried out through following two steps. A first process of kneading the graphite powder particles with lignin aqueous solution into a slurry, and a second process of adding to the slurry lead powder mainly composed of lead monoxide and a given amount of negative electrode additive, and kneading it with water or diluted sulfuric acid. PCOPYRIGHT: (C)2010,JPO&INPIT