Air-depolarized primary cell

Details Air-depolarized primary cell Air-depolarized primary cell

1979-07-17

1980-07-08

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 66, H01M 400

Patent

active

042118301

ABSTRACT:
The invention relates to an air-depolarized primary cell which includes a container (1), a negative electrode (4) disposed against the walls of the container, a positive electrode (3) disposed in the central portion of the container and a ventilation circuit (6, 8, 9, 28) for the positive electrode; a gas-filled space (15) is provided above the negative electrode and the electrolyte for accommodating the negative electrode as it expands during use; the space is delimited by the ventilation circuit, the walls of the container and a wall (26) which is impermeable to oxygen. In accordance with the invention, the periphery of the impermeable wall has a step configuration rim (27, 30) welded to the walls of the container, this avoids cracks damaging the seal (17) between the impermeable wall (26) and the ventilation circuit when the walls of the container (1) are deformed by the expanding negative electrode.

REFERENCES:
patent: 3840406 (1974-10-01), Depoix
patent: 3855000 (1974-12-01), Jammet
patent: 3871920 (1975-03-01), Grebier et al.

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