Method for preparing lithium-ion battery separator
US11101524B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Feb 8, 2017 |
| Grant date | Aug 24, 2021 |
| Priority date | — |
| Expiry date | Oct 4, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for preparing a lithium-ion battery separator is disclosed. The method comprises: cooling and shaping a liquid-phase stabilization system containing polyethylene, stretching to enlarge pores, extracting with a solvent, and heat-setting to obtain a lithium-ion battery separator, wherein the stretching includes pre-stretching and synchronous bidirectional stretching, and the pre-stretching is completed before the synchronous bidirectional stretching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.