| 摘要 |
PURPOSE:To obtain a sealed lead-acid battery, which has the excellent charge and discharge efficiency and the excellent charge receiving property and the excellent sealing reaction efficiency and a long lifetime, by specifying a range of the specific surface area and the addition quantity of carbon to be added in the negative electrode active material. CONSTITUTION:The negative electrode active material obtained by adding 1-5weight% of carbon, of which specific surface area measured by the BET method IS 30-150m<2>/g, to the lead powder quantity is used. In a sealed lead-acid battery, since the electrolyte quantity is little and the electrolyte is fixed for non-fluidization, even if the addition quantity of carbon is increased, carbon is not isolated, and a sealed lead-acid battery can be used under the condition that the carbon is held in the negative electrode active material. Consequently, a sealed lead-acid battery, which has the excellent charge and discharge characteristics and the excellent charge receiving property and the excellent sealing reaction efficiency and a long lifetime, can be obtained by increasing the carbon addition quantity in the negative electrode active material. |
