Surface-treated steel sheet for battery case, battery case comprising the same, methods for producing them, and battery
US6551721B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2001 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Apr 23, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12937
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A purpose of the present invention is to provide a surface treated steel sheet for a battery container having an excellent anti-alkaline characteristic and a performance for maintaining a discharging level for a long time, a battery container and a product method thereof. In the present invention, after forming a nickel-bismuth alloy layer on a steel sheet, the steel sheet is thermally treated at 300° C. to 650° C. in an inactive gas or a deoxidizing gas for 240 to 600 min so that an iron-nickel diffused layer and nickel-bismuth diffused layer are formed at each boundary surface. A battery is produced by utilizing a battery container made of a steel sheet on which one or more than layers selected from a group of an iron-nickel diffused layer, a nickel layer, a nickel-bismuth diffused layer, an iron-nickel-bismuth alloy layer is formed on the steel sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.