Cylindrical secondary battery including structure configured to block laser beam for welding and battery pack including the same
US11171371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2020 |
| Grant date | Nov 9, 2021 |
| Priority date | — |
| Expiry date | May 15, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cylindrical secondary battery including a cylindrical battery case configured to receive an electrode assembly and an electrolytic solution, a cap assembly located on the open upper end of the cylindrical battery case, and a jelly-roll type electrode assembly configured to have a structure in which a positive electrode sheet and a negative electrode sheet are wound in the state in which a separator is interposed therebetween, wherein a protective layer, made of a material that exhibits high thermal conductivity, is formed on at least a portion of the inner surface of the cylindrical battery case, including a crimping part is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.