| 摘要 |
<p>1,131,458. Batteries. INSTITUTO NACIONAL DE INDUSTRIA CENTRO DE ESTUDIOS TECNICOS DE MATERIALES ESPECIALES, R. S. GUMUCIO and A. P. ARDANUY. 20 Dec., 1965 [2 June, 1965], No. 53976/65. Heading H1B. A storage battery has lead dioxide positive plates, negative plates whose active mass is a composite amalgam of silver and one or more of the metals zinc, cadmium and copper, and an acid electrolyte. The silver may be alloyed with one of the said metals before amalgamation. A zinc-silver amalgam is prepared by mixing finely divided silver and zinc together, adding mercury and mixing, and boiling in dilute acid. The powdered mass thus produced is washed, filtered, and dried before pressing on to a silver-plated support. The support may be a silver-plated drilled iron sheet, a silverplated lead or titanium sheet or a silver or silver alloy grid. The acid used is a 25% to 36% aqueous solution of sulphuric acid. In a practical embodiment the positive electrodes are enclosed in microporous p.v.c. envelopes with integral spacing rods to separate the envelopes from the surface of the positive plates.</p> |
