Hermetically sealed electrical feedthrough for high temperature secondary cells
A passthrough seal is disclosed for electrically isolating the terminal in a lithium/metal sulfide cell from the structural cell housing. The seal has spaced upper and lower insulator rings fitted snuggly between the terminal and an annularly disposed upstanding wall, and outwardly of a powdered insulator also confined between the upstanding wall and terminal. The adjacent surfaces of the upper insulator ring and the respective upstanding wall and terminal are conically tapered, diverging in the axial direction away from the cell interior, and a sealing ring is located between each pair of the adjacent surfaces. The components are sized so that upon appropriate movement of the upper insulator ring toward the lower insulator ring the powdered insulator and sealing rings are each compressed to a high degree. This compacts the powdered insulator thereby rendering the same highly impervious and moreover fuses the sealing rings to and between the adjacent surfaces. The upper and lower insulator rings might be formed of beryllium oxide and/or alumina, the powdered insulator might be formed of boron nitride, and the sealing rings might be formed of aluminum.
- DOE Contract Number:
- W-31-109-ENG-38
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE84011122
- OSTI ID:
- 6925362
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LITHIUM-SULFUR BATTERIES
SEALS
ALUMINIUM
ALUMINIUM OXIDES
BERYLLIUM OXIDES
BORON NITRIDES
ELECTRICAL INSULATION
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
BERYLLIUM COMPOUNDS
BORON COMPOUNDS
CHALCOGENIDES
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELEMENTS
METAL-NONMETAL BATTERIES
METALS
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries