Pouch-type secondary battery including pouch case with concave groove having bottom surface with area larger than opening area of concave groove and pouch film forming apparatus
US10818884B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Mar 14, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is a pouch-type secondary battery, which includes an electrode assembly having a positive electrode plate and a negative electrode plate disposed to face each other and a pouch case having a concave groove formed to accommodate the electrode assembly, wherein the pouch case includes a first pouch film and a second pouch film thermally fused to the first pouch film, and wherein a concave groove is formed in at least one of the first pouch film and the second pouch film, and the concave groove has a bottom surface on which the electrode assembly is placed so that the bottom surface has an area equal to or greater than an area of a reference surface that covers an opening of the concave groove.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.