Secondary battery and preparation method thereof, and battery module, battery pack, and apparatus containing such secondary battery
US11658335B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 4, 2022 |
| Grant date | May 23, 2023 |
| Priority date | — |
| Expiry date | Jul 4, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Embodiments provide a secondary battery and a preparation method thereof, and a battery module, battery pack, and apparatus containing such secondary battery. In those embodiments, a negative electrode plate includes a negative-electrode current collector and a negative-electrode film layer that is disposed on at least one surface of the negative-electrode current collector and that includes a negative-electrode active material. The negative-electrode active material contains graphite, and the negative electrode plate satisfies that, when the negative electrode plate and a lithium metal sheet constitute a button battery which is discharged to 5.0 mV at 0.05 C, a capacity increment curve V-dQ/dV of the button battery has a third-order lithiation phase transition peak of graphite at position 0.055V-0.085V.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.