| 摘要 |
<p>1,273,783. Activatable lead-acid battery. GLOBE-UNION Inc. 4 June, 1969 [17 Feb., 1969], No. 28263/69. Heading H1B. A concentrated sulphuric acid gel suitable for use in dry-charged lead-acid batteries comprises at least 95% sulphuric acid and a gelling agent prepared by reacting an oxide or oxy-acid of boron with an oxide or oxy-acid of phosphorus in a ratio within the area ABCDE of Fig. 1. In examples, the gelling agent is prepared from boric acid and phosphoric acid. In one embodiment, the gel according to the invention is stored in the dry-charged battery in a rectangular polypropylene tray 10, Fig. 3, which tray sits on top of the plates. The tray is perforated at the bottom and indentations 20 and step 21 fit over the inter-cell connectors. In another embodiment, Fig. 6, the tray is provided with a central funnel 32. Water entering the cell passes through the gel, without dissolving it, until the rising water level in the battery eventually submerges the tray. In a third embodiment, Fig. 7, the gel is enclosed in a perforated bag which is placed vertically in the battery. Water is admitted through microporous polythene tube 38.</p> |
