| 摘要 |
This pole plate for a lead storage battery comprises an expandable grid formed from lead or a lead alloy and an active substance packed in the expandable grid. The expandable grid is a quadrangle having a tab part projecting from one side. When the expandable grid stands vertically such that the side having the tab part is the top side, the upward facing surface and the downward facing surface of the grid strands have a surface compact layer that has a smaller crystal grain diameter than the center portion of the strands and the compact layer of the upward facing surface of the strands is thinner than that of the downward facing surface. |
