Process for sealing electrochemical cells
First Claim
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1. A process for manufacturing an improved grommet and metal cover for use in a galvanic cell, the process comprising:
- (a) swelling the grommet which is comprised of a polyolefin or a nylon and which has been placed tightly around the periphery of the metal cover until the grommet is loose upon the metal cover,(b) forcing a sealant solution between the swollen grommet and metal cover, the sealant solution comprising solvent and sealant material of rosin, polystyrene, polyolefin ethylene vinyl acetate, polyamine, bitumin or thermoplastic elastomer and,(c) shrinking the grommet to substantially its original size to trap the sealant material between the grommet and metal cover.
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Abstract
A process for improving leakage resistant in a galvanic cell is provided. This is done by making an improved grommet and metal cover. The process comprises swelling a grommet which has been placed tightly around the periphery of a metal cover until the grommet is loose upon the metal cover, forcing a sealant solution between the swollen grommet and metal cover and then shrinking the grommet to substantially its original size to trap the sealant compound between the grommet and metal cover.
22 Citations
10 Claims
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1. A process for manufacturing an improved grommet and metal cover for use in a galvanic cell, the process comprising:
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(a) swelling the grommet which is comprised of a polyolefin or a nylon and which has been placed tightly around the periphery of the metal cover until the grommet is loose upon the metal cover, (b) forcing a sealant solution between the swollen grommet and metal cover, the sealant solution comprising solvent and sealant material of rosin, polystyrene, polyolefin ethylene vinyl acetate, polyamine, bitumin or thermoplastic elastomer and, (c) shrinking the grommet to substantially its original size to trap the sealant material between the grommet and metal cover. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification