Air-depolarized primary cell
US4211830A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Jul 17, 1979 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Jul 17, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M12/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.