Sodium sulphur cells
US3982957A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1975 |
| Grant date | Sep 28, 1976 |
| Priority date | — |
| Expiry date | Feb 14, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a sodium sulphur cell, the cathode current collector in the sulphur/polysulphide cathodic reactant comprises a carbon or graphite tube containing a solid metal, e.g. aluminium, core and a liquid metal, e.g. tin or a tin-lead alloy, as a conducting interface between the carbon or graphite tube and the core. In a preferred construction, the current collector is axially located within a cylindrical electrolyte tube, the space between the electrolyte tube and graphite tube containing the sulphur/polysulphides and a graphite felt. The outer surface of the graphite tube in this case may have grooves or recesses to form a sulphur reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.