Laminate, non-aqueous electrolyte secondary battery separator including the laminate, and non-aqueous electrolyte secondary battery including the laminate
US9923181B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Aug 4, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a laminate which is capable of ensuring a high level of safety by preventing an internal short circuit due to, for example, breakage of a non-aqueous electrolyte secondary battery while maintaining various performance capabilities of the non-aqueous electrolyte secondary battery. A laminate (10) includes: a porous film containing polyolefin as a main component; and a porous layer containing fine particles; the porous layer being laminated to at least one side of the porous film, in an electrical conduction test by nail penetration in which test a displacement in a thickness direction of the laminate (10) during a period from when a dielectric breakdown occurs in the laminate (10) to when the laminate (10) is brought into electrical conduction is measured by use of a nail (2) of N50 specified in JIS A 5508 and under a condition in which the nail (2) descends at a descending speed of 50 μm/min, the displacement being not less than 20 μm and not more than 200 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.