AIR-ALUMINUM CELL, BATTERY BUILT AROUND AIR- ALUMINUM CELLS AND ITS MAINTENANCE Russian patent published in 1999 - IPC

FIELD: air-metal batteries used as small-size off-line rechargeable current supplies. SUBSTANCE: box-type electrochemical cell has electrolyte vessel with filler hole on its top, cover, flat expendable metal anode placed in electrolyte tank, gas-diffusion cathode spaced at certain distance from working surface of anode with gas (for example, air) easily flowing around it, and gas accumulating chamber. Uninterrupted taper ridge is provided in top part of electrolyte vessel around filler hole which functions as labyrinth seal; two stopping bosses are made in central parts of electrolyte vessel walls and two ones at its bottom; electrolyte vessel V accommodates in its bottom mud accumulating chamber V_m with volume proportion V:V_m= 5-15; anode thickness is 1-3 mm and makes up 0.05 to 0.50 of cathode gap; volume of electrolyte vessel is determined from expression , where V is vessel volume, cu.cm; V_el is electrolyte volume, cu. cm; V_an is anode volume, cu.cm; q_el is specific water discharge from electrolyte, cu.cm/A h; q_elch is specific aluminum consumption for reaction, cu.cm/A h; Q is cell capacity per cycle, A h; K₁= (0,44-1,45) is design factor; K₂= (1,97-1,49) is design factor; length x width x height is 1:0.38:2.7; 1:0.35:3.1; 1:0.33:3.9. Battery has case, cover with switching members, and at least one air-metal cell of proposed design. Cell or battery maintenance includes its discharge, replacement of anodes and electrolyte, and rinsing of cells. Anodes are treated with aqueous solution of sodium oxide of (2-5) mole/l concentration doped with trihydrate sodium metastannate of (0.01-0.10) mole/l concentration prior to use. EFFECT: improved design. 3 cl, 5 dwg, 2 tbl