Oxidation resistant enveloped separator

Details Oxidation resistant enveloped separator Oxidation resistant enveloped separator

1993-09-27

1995-01-24

Skapars, Anthony

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

429139, 296235, H01M 214

Patent

active

053842111

ABSTRACT:
A battery separator formed into an envelope and having improved oxidation resistance is disclosed. The sealed edge along the bottom of the envelope and preferably also along the vertical side edges of the envelope has a greater amount of a processing aid, such that the treated area has from a 5 to 100%, preferably 5 to 20% and more preferably 10 to 100% greater amount of processing aid than the average of the rest of the envelope. One embodiment is to impregnate the treated area with additional processing aid. One embodiment is to impregnate the treated area with additional processing aid. A further embodiment is impregnate a porous layer with additional processing aid and locate that porous layer adjacent and preferably in intimate contact with the treated edge. A third embodiment is to add an amount of processing aid into the battery box before inserting the enveloped plates and allowing the envelopes to absorb the aid.

REFERENCES:
patent: 3900341 (1975-08-01), Shoichiro et al.
patent: 4210998 (1980-07-01), Gaunt
patent: 4359511 (1982-11-01), Strzempko
patent: 4539271 (1985-09-01), Crabtree
patent: 4663253 (1987-05-01), Simonton et al.
patent: 4668320 (1987-05-01), Crabtree
patent: 4680242 (1987-07-01), Simonton et al.
patent: 5116698 (1992-05-01), Sears

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