Nickel hydrogen storage battery
US7790306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Jul 7, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M50/469
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A negative electrode plate of a nickel hydrogen storage battery includes a nonaqueous polymer binder and has an effective surface area per unit capacity of 70 cm2/Ah or more. The density of the first and second separators between positive and negative electrode plates ranges from 450 kg/m3 to 600 kg/m3. The nonwoven fabrics of the separators are formed by combining microfibers and compound fibers through melting portions of the compound fibers. The fibers have a virtually circular cross-section. The microfibers and the compound fibers have a diameter ranging from 1 μm to less than 5 μm and a diameter ranging from 5 μm to 15 μm, respectively. The proportion of the microfibers to whole fibers ranges from 10 percent by mass to 20 percent by mass. At least one of the nonwoven fabrics of the separators is subjected to sulfonation treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.