Год выпуска: 2009 Автор: P. G. Balakrishnan, John Rethinam Издательство: Страниц: 110 ISBN: 1604562692
Описание
Although Gaston Plante invented the lead-acid battery in 1859 in France, it took about a century to make it maintenance-free in the sense that there is no necessity for topping up the battery with water. This was made possible by the invention of a hermetically sealed nickel oxyhydroxide-cadmium battery. Though such batteries were variously called in the beginning as maintenance-free battery, sealed battery, starved electrolyte battery, absorbed electrolyte battery, etc., due to heavy litigation, particularly in the U.K., the term valve-regulated lead-acid battery (VRLAB) was coined to obviate the legal battle. The VRLAB operates on the principle of 'internal oxygen cycle' without resorting to the use of catalytic recombination plugs. The binary alloys used in the initial periods of development of VRLAB had no aluminium or silver. After the introduction of Ca-Al master alloy for preparing the Pb-Ca-Al alloy, the grid casting problems were minimised. The introduction of tin to...
