Flexible jelly-roll type secondary battery
US9478824B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2014 |
| Grant date | Oct 25, 2016 |
| Priority date | — |
| Expiry date | Feb 28, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a jelly-roll type electrode assembly. In the jelly-roll type electrode assembly including a cathode including a cathode active material coating layer and an anode including an anode active material coating layer, with a separation film interposed therebetween, and formed to be rolled, the jelly-roll type electrode assembly is characterized in that the anode and the cathode include uncoated portions, the uncoated portions are overlapped and include mirror images formed on a front surface and a rear surface, and the jelly-roll type electrode assembly is flexible in the uncoated portion. A pouch-type secondary battery, a battery pack and a device including the electrode assembly are provided. A flexible jelly-roll type secondary battery may be reversibly flexible while blocking the separation of an electrode active material from a current collector surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.