Separator for mat-immobilized-electrolyte battery

Details Separator for mat-immobilized-electrolyte battery Separator for mat-immobilized-electrolyte battery

1992-11-16

1993-10-05

Maples, John S.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

429249, 429253, H01M 216, H01M 214

Patent

active

052503720

ABSTRACT:
An electrolyte-immobilizing mat for a mat-immobilized-electrolyte battery comprising a plurality of randomly oriented resilient fibers resistant to and wettable by sulfuric acid electrolyte, wherein the mat is held in a stressed, precompressed state by a resin which is substantially insoluble in sulfuric acid but is sufficiently degradable therein under battery formation conditions to free the mat from its stressed state during formation and allow it to swell within battery cell element. Thermosetting resins and particularly melamine-formaldehyde are preferred. The invention is particularly useful with mats made from glass fibers.

REFERENCES:
patent: 3553020 (1971-01-01), Corbu et al.
patent: 3862861 (1975-01-01), McClelland et al.
patent: 4743270 (1988-05-01), McCartney, Jr. et al.
patent: 5091275 (1992-02-01), Brecht et al.
Journal of Power Sources, vol. 23, 1988, Lausanne CH pp. 109-111, J. W. Reitz "Update of Separator Technology for Lead-Acid Batteries".

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