GB276718A - Improvements in or relating to electric accumulators - Google Patents

Abstract

276,718. Tudor, J. May 21, 1926. Electrodes. - In order to economize space more particularly in quick-discharge accumulators of the " starting battery " type, plates of similar polarity are grouped in units arranged in alternative relation with respect to similar units of opposite polarity, so that the number of separators necessary for separating plates of opposite polarity is reduced. Fig. 1 shows one such arrangement in which two groups each made up of two positive plates are separated by a group of two negative plates and contained between two outer single negative plates, the number of separators E being thus reduced from eight to four as compared with the usual arrangement, and the number of negative plates from five to four. In other arrangements a group of four positive plates is spaced between two groups of two negative plates, the number of separators being reduced to two, and in a third arrangement groups of four positive and four negative plates separated by a single separator are employed. In order to provide a free flow for the electrolyte, a number of holes o, Fig. 4, may be formed in the grid of the electrode, or small holes may be pierced in the active mass. Fig. 10 shows a section in plan of another form of electrode in which a central plate A coated with oxides is bounded on each side by plates B formed by vertical ribs n which prevent disintegration of the active material and at the same time provide large plate area while giving free flow to the electrolyte through the spaces e. Compound plates may be built up of alternate plates such as A and B, holes being provided in the plates A to allow the electrolyte to reach the interior of the plate.