METAL-AIR BATTERY Russian patent published in 2002 - IPC

FIELD: electrical engineering. SUBSTANCE: metal-air battery has case, power leads, at least two pocket-type metal-air cells with gas-diffusion cathodes on opposite sides of pocket, liquid electrolyte, and metal anodes dipped in electrolyte inside pocket and placed in spaced relation to each other inside case; electrolyte loop with common header and electrolyte tank; the latter and common header are placed above upper edge of metal-air cells; electrolyte tank communicates with header through flexible pipeline. Hole is made on one or both sides of each cell in its bottom part, hole diameter being 0.8 to 1 of inner cross-section of cell. Mentioned holes communicate through flexible pipelines with one or two common headers. The latter are made of electrolyte-nonwettable material. Electrolyte tank is, essentially, hopper with flexible semispherical lid fitted onto hopper with negative allowance. Removable plugs may be mounted at ends of headers. Each cell is provided with sealed cover that has cavity communicating with cell electrolyte via pipeline and filled with electrolyte or water. Bottom edge of mentioned pipeline is below electrolyte level in cell. Ratio of cover cavity volume to anode mass in cell (cu. cm/g) is 1 to 10. Fan is installed on face wall of battery case and is connected through temperature controller with power leads of battery. Metal anode of each battery cell has cylindrical current lead connected to hermetically sealed current lead passed through sealed hole in top part of face wall of each cell. Released hydrogen is vented through holes made in top part of face wall of each cell. EFFECT: enhanced specific power characteristics and service life, facilitated servicing of battery. 14 cl, 3 dwg