Patent · US Expired

Separator for sealed lead accumulators

US6124059A · kind A · utility

38Cited by

9References

32Claims

0Family size

Assignee

DARAMIC, LLC · US

Inventors

Werner Bohnstedt · Henstedt-Ulzburg, DE
Jörg Deiters · Ettenheim, DE
Klaus Heinrich Ihmels · Hamburg, DE
Jurgen Ruhoff · Norderstedt, DE

Key dates

Filing date	Sep 1, 1998
Grant date	Sep 26, 2000
Priority date	—
Expiry date	Sep 1, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24999
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to microporous battery separators based on an essentially homogeneous mixture of a thermoplastic polymer, an inert filler and optionally a plasticizer. The separators contain, as filler, pyrogenic silica in a quantity of more than 20 vol. % and optionally one or more further fillers, so that the filler content overall is more than 60 up to a maximum of 82 vol.-%. The separators are suitable in particular for the manufacture of sealed accumulators.

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