Patent · US Expired

Zinc powder or zinc alloy powder with inhomogeneous bulk density for alkaline batteries

US7323031B2 · kind B2 · utility

2Cited by

1References

19Claims

0Family size

Assignee

Grillo-Werke AG · DE

Inventors

Armin Melzer · Dinslaken, DE
Petra Merkel · Bad Harzburg, DE
Jochen Spriestersbach · Bornheim, DE
Rudi Kube · Bad Harzburg, DE
Norbert Schulz · Ichenhausen, DE

Key dates

Filing date	Jan 9, 2004
Grant date	Jan 29, 2008
Priority date	—
Expiry date	Aug 11, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH01M6/04
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to zinc powders or zinc alloy powders with an inhomogeneous bulk density distribution depending on the particle size, wherein the difference of the bulk density measured according to ASTM B212 in the particle size range smaller than 75 μm and that in the particle size range greater than 150 μm is at least 0.5 g/cm3, and the mean bulk density of the powder, measured according to ASTM B212, ranges from 1.8 to 4.0 g/cm3. The invention is also directed to mixtures of said zinc powders or zinc alloy powders and to an alkaline battery including said powders.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.