Polyolefin porous membrane, battery separator obtained using same, and method of producing same
US10153470B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Feb 12, 2014 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | May 2, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A polyolefin porous membrane disclosed. The membrane includes a plurality of protrusions of polyolefin having a size (W) of 5 μm≤W≤50 μm and a height (H) of 0.5 μm≤H. The protrusions are disposed on one side of the polyolefin porous membrane with a density of at least 3/cm2 and at most 200/cm2, and the polyolefin porous membrane has a thickness of at most 20 μm. A battery separator including the membrane is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.