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US 4,053,692 AGranted
Hermetically sealed cells
AssigneeP. R. Mallory & Co. Inc.
InventorArabinda N. Dey
Life of this patent
Estimating the term…
Abstract
Hermetic closure for electrochemical cells utilizing glass to metal seals in combination with electrolyte introduction means. A hollow tube anode current collector is sealed to a glass ring which is sealed to a metal outer ring.
Claims13
An electrochemical cell having an hermetic seal assembly for closing the open end of the container for said cell;
- said hermetic seal assembly comprising a metal rod, a ring shaped glass member permanently concentrically sealed to said metal rod at its upper end, and a metal member permanently sealed to said glass member;
- said metal rod extending axially within said cell, having liquid passage means therethrough and being an electrical terminal for said cell and an electrolyte fill port, with the upper end of said rod having been permanently closed after the introduction of said electrolyte to close said liquid passage;
- said metal rod being in contact with an active electrode material of said cell and being formed of a metal which is different from but chemically compatible with said active electrode material;
- said glass member having a thermal coefficient of expansion substantially similar to said metal comprising said tube;
- and said glass member being inert with respect to material contained within said cell;
- and said metal member being hermetically permanently sealed to said container at said open end.
3 more elements
Dependencies are inferred from the claim text.