Collector assembly for an electrochemical cell including an inte

Details Collector assembly for an electrochemical cell including an inte Collector assembly for an electrochemical cell including an inte

1998-03-06

2000-05-09

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Blowout type

429 57, 429171, 429185, H01M 212, H01M 208

Patent

active

060601922

ABSTRACT:
An electrochemical cell constructed in accordance with the present invention includes a can for containing electrochemical materials including positive and negative electrodes and an electrolyte, the can having an open end and a closed end; an integral seal/inner cover assembly positioned in the open end of the can, the integral seal/inner cover assembly having a rigid inner cover and a seal preformed directly onto at least an inner-facing surface of the rigid inner cover; a collector extending through a central hole provided in the integral seal/inner cover assembly and into the can so as to contact one of the electrodes; and an outer cover positioned across the open end of the can proximate an outer-facing surface of the rigid inner cover, the outer cover being positioned so as to be in electrical contact with the collector. The rigid inner cover preferably includes at least one aperture extending from the inner-facing surface to the outer-facing surface of the inner cover. The aperture being filled by the seal to provide a pressure relief that relieves internal pressure from the can when the internal pressure becomes excessive. Preferably, the seal is made of rubber and is molded directly onto the rigid inner cover.

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