Manufacturing method of secondary battery, secondary battery, and assembled battery
US9812686B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Feb 23, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4911
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A secondary battery includes an opening portion provided to a case. A first sealing body is provided to the opening portion, the first sealing body being displaced or deformed by a pressure difference between an inside and an outside of the case in such manners that the first sealing body is pressed by internal pressure to allow outflow of inside air from the opening portion when the internal pressure in the case is higher than external pressure and that the first sealing body is pressed by the external pressure to prevent entry of outside air from the opening portion when the internal pressure in the case is lower than the external pressure. Pressure in a space surrounded with the case and the first sealing body is set to be lower than pressure outside the space.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.