Trilayer battery separator
US6180280A · kind A · utility
21Cited by
8References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 12, 1998 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Mar 12, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A trilayer shutdown battery separator is provided having two microporous strength layer membranes sandwiching one microporous shutdown layer membrane. The strength layers are made by a stretch method. The shutdown layer is made by a phase inversion method. The preferred method of making such a trilayer separator comprises: making microporous strength layers by a stretch method; forming a microporous shutdown layer by phase inversion process; and bonding two microporous strength layers and one microporous shutdown layer into the trilayer battery separator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.