| 摘要 |
PURPOSE:To contrive to reduce the deterioration rate of battery performance taking place during preservation at a normal temperature for a long term and preservation at a high temperature, by providing a gel-formed negative pole which is produced by dispersing negative pole active material through gel-formed electroyte consisting of alkaline electrolytic liquid and gelatinizer and employing crosslinking branched type sodium polyacrylate and carbamidine-gum in parallel as the gelatinizer. CONSTITUTION:Branched type sodium polyacrylate and carbamidine-gum are used in parallel as a gelatinizer for gel-formed negative pole of an alkaline battery and the concentration of gel-form electrolyte is set in a range from 0.5-4.0wt% for the branched type sodium polyacrylate and in a range from 0.25-3.0wt% for carbamidine-gum. Namely, positive pole black mix 2 consisting of manganese dioxide and graphite is molded in a cylindrical shape in advance to be placed in a positive pole case 1 and a cup-shaped separator 3 is inserted in the center thereof. Then, the gel-formed negative pole 4 is poured in the cup-shaped separator 3. Thereafter, a negative pole collector 6 accompanied by a gasket 5 is inserted in the center part of the gel-formed negative pole 4 to form an elementary cell. Thus, the deterioration rate of battery performance taking place during preservation at a normal temperature for a long term and preservation at a high temperature can be reduced and such performance of a battery as being stabilized against drop and vibration can be secured. |
