Cylindrical electrochemical cells with a diaphragm seal
Patent
·
OSTI ID:7369211
A cylindrical electrochemical cell is described comprising an anode, a cathode and electrolyte contained in a cylindrical container, the container having an open end and a closed end; wherein the open end of the container is sealed with a seal assembly comprising: (a) a disc-shaped seal member, made from an electrically insulative material, having an outer edge wall connected via a base to a centrally located cylindrical hub that defines an orifice; which base has a ventable diaphragm portion and a nonventable diaphragm portion that is thicker than the ventable diaphragm portion; and wherein the ventable diaphragm portion joins the hub at an interface and becomes gradually thicker in the direction away from the interface toward the outer edge wall so that the ventable diaphragm portion is thinnest at the interface; and (b) a current collector extending through the orifice defined by the hub into the cell's interior to contact one of the cell's electrodes.
- Assignee:
- Eveready Battery Co., Inc., St. Louis, MO (United States)
- Patent Number(s):
- A; US 5227261
- Application Number:
- PPN: US 7-775401
- OSTI ID:
- 7369211
- Country of Publication:
- United States
- Language:
- English
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