Nonaqueous electrolyte secondary battery
US10957941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2018 |
| Grant date | Mar 23, 2021 |
| Priority date | — |
| Expiry date | May 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2300/0094
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nonaqueous electrolyte secondary battery which satisfies four requirements is provided. A porous layer contains α-form polyvinylidene fluoride-based resin in an amount of not less than 35.0 mol % with respect to 100 mol % of a total amount of (i) the α-form polyvinylidene fluoride-based resin and (ii) β-form polyvinylidene fluoride-based resin. A porous film has a temperature rise ending period of 2.9 sec·m2/g to 5.7 sec·m2/g with respect to an amount of a resin per unit area when the porous film is impregnated with N-methylpyrrolidone containing water in an amount of 3% by weight and then (ii) irradiated, at an output of 1,800 W, with a microwave having a frequency of 2,455 MHz. A positive electrode plate has a capacitance of 1 nF to 1000 nF per measurement area of 900 mm2. A negative electrode plate has a capacitance of 4 nF to 8500 nF per measurement area of 900 mm2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.