| 摘要 |
791,456. Batteries. SVENSKA ACKUMULATOR AKTIEBOLAGET JUNGNER. July 22, 1955 [April 1, 1955], No. 21289/55. Drawings to Specification. Class 53. The positive electrode of the cell of a gaslight accumulator is arranged to have a greater charge than the negative electrode by including in the cell an auxiliary electrode or an oxidation agent which on closure of the cell, but before using the cell for normal discharge, is capable of giving up oxygen to the active material of one of the electrodes. The auxiliary electrode may comprise charged positive-active material, in which case, with the cell in the open state, both electrodes of the cell are fully charged, the cell closed and the negative electrode partially discharged by the auxiliary electrode. Alternatively the auxiliary electrode may comprise uncharged negative active material, in which case either (a) the cell in the open state is partially charged, the cell closed and the charging of the positive electrode completed by means of the auxiliary electrode, or (b) the cell is fully charged, the cell closed and the positive electrode further charged by the auxiliary electrode to generate oxygen and so partially discharge the negative electrode. As a further alternative the auxiliary electrode may comprise charged positive active material and the positive electrode charged or the negative electrode discharged by this means. The auxiliary electrode may be arranged above, below or at the side of the cell or may be sintered to the wall of the metal cell case. The auxiliary electrode can be surrounded with porous cloth which dips into the electrolyte. The oxidation agents used can be e.g. oxides or peroxides of alkali or alkaline earth metals, or magnesium, hydrogen peroxide, permanganates, perborates or benzoyl-peroxide. Inhibitors may be included and the agent may be actuated from outside the cell by heating, shaking, ultrasonic vibrations, electric or magnetic fields or by irradiation. |
