| 摘要 |
PURPOSE: To provide a positive plate for a lead acid battery which can extend a trickle life by sufficiently forming a fine α-PbO2 layer in a surface of a collector unit. CONSTITUTION: An unformed positive plate, formed with an active material layer on a collector unit composed of lead-calcium alloy, is formed to prepare a formed positive plate. The formed positive plate is immersed in dilute sulfuric acid added with a boric acid ion, to manufacture a positive plate for a lead acid battery. |
