Sealed lead-acid battery

Details Sealed lead-acid battery Sealed lead-acid battery

1980-01-23

1981-04-14

Lefevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429247, H01M 604

Patent

active

042620686

ABSTRACT:
The invention involves to a maintenance-free type sealed lead-acid batteries. In such battery, a combined separator is of a double layer made by double laminating a sheet-shaped separator formed by entangling glass fibers of a diameter not larger than 1 micron as a base with glass fibers of a diameter not smaller than 5 microns or preferably of 10 to 30 microns and a porous member having a maximum pore diameter larger than of the sheet-shaped separator and the electrolyte consists of an aqueous solution of sulfuric acid in which a small amount of a viscosity increasing agent is present.
The thus formed batteries are low in the cost and are high in the gas absorbing performance and life performance.

REFERENCES:
patent: 2484787 (1949-10-01), Grant
patent: 3014085 (1961-12-01), Bachman
patent: 3085126 (1963-04-01), Labino
patent: 3753784 (1973-08-01), Eisenacher
patent: 3776779 (1973-12-01), Johnson
patent: 3862861 (1975-01-01), McClelland et al.
patent: 4119772 (1978-10-01), Peters et al.

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