Patent · US Expired

Storage battery with separator of dumbbell-shaped fibers

US4137379A · kind A · utility

10Cited by

9References

3Claims

0Family size

Assignee

Firma Carl Freudenberg · DE

Inventors

Klaus Schmidt
Harald Hoffmann · Much, DE
Erich Fahrback · Weinheim, DE

Key dates

Filing date	Apr 19, 1977
Grant date	Jan 30, 1979
Priority date	—
Expiry date	Apr 19, 1997

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In a storage battery comprising a housing, a plurality of plates within said housing, an electrolyte within said housing about said plates, and a non-woven fabric separator between adjacent plates, the improvement which comprises employing as said separator a compressed web of synthetic fibers deposited in random arrangement and having an essentially dumbbell-shaped profile. Preferably the fibers comprise polystyrene, polyolefin or polycarbonate and have a maximum diameter of about 1 to 10 .mu.m, and the web has a thickness of about 0.05 to 0.3 mm, a weight of about 20 to 100 g/m.sup.2, a pore volume of about 50 to 90% and an average pore size from about 0.5 to 15 .mu.m.

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