Lithium-ion battery and use thereof
US8658305B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2009 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Apr 10, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49115
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The lithium-ion battery provided by the present invention has an electrode assembly (30) obtained by superposing and winding together a long continuous positive electrode sheet (32) and negative electrode sheet (34) with a separator (35) interposed therebetween. An active material layer (344) is formed on the negative electrode sheet (34), with a band-shaped margin being left on one edge thereof along the lengthwise direction of the collector (342). The above band-shaped portion (342a) sticks out beyond the edge of the positive electrode sheet (32). On the exterior surface of the negative active material layer (344), a porous inorganic layer (346) is formed starting at the flat part (344a) of the active material layer, wrapping around the edge (344b) thereof, and extending to the surface of the collector (342). The porosity Pa at the edge (344b) of the inorganic layer (346) is less than the porosity Pb at the flat part (344a) thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.