| 摘要 |
PROBLEM TO BE SOLVED: To provide a sealed lead-acid battery manufactured in a container formation process which enhances formation charging efficiency and reduces deterioration in high rate discharging characteristic. SOLUTION: A mixture of powder comprising mainly lead monoxide having a mean particle size of 3-10μm and trilead tetroxide powder having a mean particle size of 1-2 times the mean particle size of the lead monoxide is used as a positive active material. By specifying the weight of the powder comprising mainly trilead tetroxide to 5-40% of the mixture weight, deterioration in high rate discharge characteristic can be suppressed. By using the powder of lead monoxide or the powder of trilead tetroxide, containing 5-200 ppm bismuth (Bi), deterioration in high rate discharge characteristic is furthermore suppressed. By setting the content of Sn in the alloy of a positive electrode grid to 1.2 wt.% or more, effect on suppressing the deterioration in high rate discharge characteristic is markedly enhanced.
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