Button cells and method of producing same
US11024869B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2020 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Feb 21, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4911
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A button cell includes a housing, the housing including a cell cup, the cell cup having a flat bottom area, a cell cup casing; an insulator; and an electrode-separator assembly winding disposed within the housing, the electrode-separator assembly winding including a multi-layer assembly that is wound in a spiral shape about an axis, the multi-layer assembly including a positive electrode formed from a first metallic film or mesh coated with a first electrode material, a negative electrode formed from a second metallic film or mesh coated with a second electrode material, and a separator disposed between the positive electrode and the negative electrode. The first metallic film or mesh is bent such that at least a portion extends out of the electrode-separator assembly winding and wherein at least a first part of the portion is not covered with the first electrode material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.