Battery container with surface treated steel sheet
US6485863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 2001 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Jan 29, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12937
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery container is manufactured by forming, by the DI or DTR forming method, a surface-treated steel sheet obtained by plating the external and internal surfaces of an original steel sheet with a nickel-cobalt alloy. The nickel-cobalt alloy coating the punching load in a cupping process, because the powdering property is remarkably reduced. Therefore, the scratching of a die and a punch caused by metallic contact is suppressed and the service lives of the die and the punch are prolonged, thus providing improved continuous productivity of the battery case which has a good stripping property in the DI or DTR forming operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.