Method of making a mat-immobilized-electrolyte battery

Details Method of making a mat-immobilized-electrolyte battery Method of making a mat-immobilized-electrolyte battery

1992-08-21

1993-08-31

Maples, John S.

Metal working

Method of mechanical manufacture

Electrical device making

429146, 429253, H01M 600, H01M 214, H01M 216

Patent

active

052404684

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), Corbin 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".
European Search Report No. EP 92202346 & Annex dated Feb. 3, 1993.

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