Low electrical resistance microporous battery separator membranes, separators, cells, batteries, and related methods
US12246520B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2023 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Aug 21, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Microporous battery separator membranes, separators, batteries including such membranes, separators are provided. A battery separator for a secondary or rechargeable lithium battery may have low Electrical resistance of less than 0.95 ohm-cm2. The inventive battery separator membrane may provide a means to achieve an improved level of battery performance in a rechargeable or secondary lithium battery based on a possibly synergistic combination of low Electrical resistance, low Gurley, low tortuosity, and/or a unique trapezoid shaped pore. Certain multilayer embodiments (by way of example only, a trilayer membrane made of two polypropylene layers with a polyethylene layer in between), the inventive microporous membrane or battery separator may have excellent onset and rate of thermal shutdown performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.