Galvanic cell with two seals

Details Galvanic cell with two seals Galvanic cell with two seals

H - Electricity

01

M

319/39

H01M 2/08 (2006.01) H01M 2/04 (2006.01) H01M 6/12 (2006.01)

Patent

CA 1123899

ABSTRACT OF THE DISCLOSURE A galvanic element of button cell configuration is provided, in addition to the usual seal of thermoplastic material between cell terminal and cell cup, with an additional seal. This fills the annular gap which is created when a contact cap surrounding the galvanic element is attached to the cell terminal. The second seal is made, for example, by casting of bitumen or casting resin into the annular gap, shaking in of synthetic plastic powder and subsequent heat treatment for attachment, or by displace- ment of a heat sensitive glue from the contact cap in response to pressing into the cell. Also, prefabricated ceramic rings with metalized surfaces, which are soldered in place between cell cup and contact cap, may be used as the second seal.

336561

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