Glass fiber separator and method of making
US5091275A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1990 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Apr 25, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49108
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The separator (20) comprises a mat of glass micro-fibers and a binder. The binder is an aqueous mixture of colloidal silica particles and a sulfate salt. The mat is impregnated with the binder, compressed, and dried into a rigid state that makes the separator easy to handle. The binder is formulated to release the mat from the compressed state contacted by the sulfuric acid electrolyte between the electrode plates (24, 26) of the battery. The mat expands against the electrode plates to provide the separator-to-electrode contact that is necessary for proper battery performance. The silica particles of the binder then facilitate oxygen transport between the battery electrodes (24, 26).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.