Toughening of PVC-separator-enveloped battery plates

Details Toughening of PVC-separator-enveloped battery plates Toughening of PVC-separator-enveloped battery plates

1978-12-04

1980-07-08

Crane, Daniel C.

Metal working

Method of mechanical manufacture

Electrical device making

296235, 429139, 427284, H01M 216

Patent

active

042109981

ABSTRACT:
A sheet of sintered PVC battery separator material is folded around a battery plate along the bottom edge thereof and heat sealed to itself along the lateral edges of the plate to form an envelope around the plate. The fold is then contacted with a plasticizer (i.e., n-methyl-2-pyrolidone) to toughen it against damage such as splitting, cracking, chipping, etc. during subsequent in-plant handling of the plates. Dimethyl and/or diethyl phthalate may be added to the n-methyl-2-pyrolidone to provide toughening for periods up to about five days.

REFERENCES:
patent: 631796 (1899-08-01), Knepper

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