Nickel metal hydride rechargeable battery and method for manufacturing negative electrode thereof
US8389159B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2005 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Aug 26, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49204
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nickel metal hydride rechargeable battery has a closed-end tubular container containing a spiral-shaped electrode assembly formed by winding a negative a positive electrode with a separator interposed therebetween such that the outermost periphery of the assembly is the negative electrode which is formed by disposing on a conductive substrate a mixture layer containing a hydrogen-absorption alloy. The positive electrode employs nickel hydroxide as an active material. In the nickel metal hydride rechargeable battery, the surface roughness of the outermost peripheral portion of the mixture layer of the negative electrode which contacts an inner side wall of the closed-end tubular container is 3.5 μM or more in terms of ten-point average roughness and is larger than the surface roughness of the other portion of the mixture layer. The reduction of oxygen gas during rapid charging is thereby facilitated without lowering the design capacity of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.