Air cell with modified sealing tab
US7563531B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2005 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Sep 8, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An air depolarized battery with an improved sealing member for sealing the air inlet port(s) of the battery before use is disclosed. The sealing member has areas of relatively high and low permeability, with an area of low permeability over at least a portion of an air inlet port. The sealing member may comprise a plurality of layers, where the area of highest permeability includes a portion of the lowest permeability layer that has a higher permeability than a surrounding portion thereof. The rate of flow of air through the low permeability area and into the battery can be easily modified to maintain a desired battery open circuit voltage during battery storage to allow activation of the battery within a short time after removal of the sealing member, while minimizing losses in discharge capacity before use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.