| 摘要 |
PURPOSE:To prevent any separation f an active material so as to obtain a lead storage battery with a long life by providing at least one surface of a separator interposed between electrodes with plural vertical ribs arranged at a pitch not more than 1/2 of the length of the major axis of polygonal cells. CONSTITUTION:An expanded metallic grid 1 used in making an electrode for a pasted lead storage battery consists of a belt-like nonexpanded area 7 having a current-collecting lug 2 and a meshy expanded area 7 having thin rhombic polygonal cells 6 each surrounded by bones 4 and knots 5 connecting the bones 4. An active material paste is applied, for example, from the expanded area 7 to a position which is located in the nonexpanded area 3 and indicated by the broken line. One surface of a separator 9 which is interposed between electrodes, is provided with vertical ribs 8 arranged at a pitch (d) not more than 1/2 of the length (l) of the major axis of the cell 6. Owing to the above constitution, any sepaation of an active material from the grid 1 is effectively prevented, thereby enabling a lead storage battery with a long life to be obtained. |
