FORCED-FLOW ELECTROCHEMICAL BATTERY

摘要

1482615 Electrolyte circulation in zinc-air batteries COMPAGNIE GENERALE D'ELECTRICITE 4 Dec 1974 [6 Dec 1973] 52403/74 Heading H1B A battery comprises a number of cells 2 grouped into modules 1 and the cells within each module being connected in series, the modules being grouped into an even number p of assemblies and the modules forming each assembly being connected in series, each assembly comprising m modules and the assemblies being connected in parallel whereby the potential of an electrolytic solution entering the first cell of the battery equals the potential of the solution leaving the last cell. The electrolyte consists of a potassium hydroxide solution containing zinc powder and is supplied to the cells from a tank 8 via pipes 91, 111, 131 and pumps 101, 121, 141. Each cell, which is of the zinc-air type, comprises a negative collector grid a, a porous separator b, a proous active catalytic layer c, a positive collector grid d and a porous water-repellent layer e. The arrangement of the pipes ensures the equality of the potentials of the electrolyte leaving the tank by the pipe 91 and returning by the pipe 131 thereby preventing corrosion in the tank.