Abstract: An improvement in electric accumulator cells having a dissoluble electrode (e.g., a zinc electrode) and a counter-electrode (e.g., nickel electrode) is disclosed. The dissoluble electrode is formed by a central layer having outer layers disposed on either plane side thereof. The outer layers are generally smaller in planar size than the central layer and preferably all of the layers are porous, perforated or netlike. The multi-layer electrode has particular utility in a cell in which the dissoluble electrode and/or separator disposed between the dissoluble electrode and counter-electrode are vibrated in the plane of the electrode. Dendrite growth and shaping of the deposited active material are substantially minimized and improved cell life is obtained.

Abstract: There is disclosed rechargeable accumulator battery apparatus in which either the zinc anode part or the porous separator part of each cell is vibrated in its own plane to produce macro and micro turbulence effects in the surrounding electrolyte to inhibit the occurrence of irregular zinc deposits on the anode in the course of repeated charge cycles. In one form, the amplitude of vibration appropriate during the charging of the particular battery is fixed mechanically by an eccentric element rotatably mounted in a permanent fashion on the battery case and adapted to be coupled to externally located motor means having a rotary power output.

Abstract: An improvement in accumulator batteries having a zinc anode and an oxide cathode (e.g., nickel oxide or silver oxide cathode) is disclosed. The zinc anode and/or separator part between the anode and cathode is vibrated at a frequency and amplitude sufficient to inhibit dendrite growth on the zinc anode. The electrolyte contains excess zinc such that solid zinc oxide is present in the fully charged condition. The separator may be provided with circulation enhancement means. The resulting batteries have long life with a large number of charging and discharging cycles.