Explosion-proof safety valve assemblage for a secondary battery
US6497978B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 2, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Mar 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The object of the present invention is to provide an explosion-proof safety valve assemblage having a lead cap which allows some of the manufacturing man-hour in the process such as precision working and positioning to be deleted, since the lead cap is integrally formed with an explosion-proof safety valve and serves to provide a current circuit in a battery in place of a conventional one composed of lead plate or lead wire which requires such precision working and positioning operations, and to provide a closed secondary battery using the above mentioned safety valve assemblage. An explosion-proof safety valve assemblage for use in a closed secondary battery comprising an outer container, an electrode element, consisting of a positive electrode, negative electrode, and a separator, accommodated in said outer container, wherein said safety valve assemblage is sealingly secured to an open end portion of said outer container via an insulating gasket integrally with a closing cap, and it consists of an explosion-proof safety valve element, a coreless disc-shaped insulator, and a lead cap formed of a metal substrate and a metal foil laminated to the metal substrate, substantially the c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.