Secondary battery, battery module, battery pack, and electric device
US12401028B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2024 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | May 1, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a secondary battery, a battery module, a battery pack, and an electric device. The secondary battery includes: a positive electrode sheet and a non-aqueous electrolyte, where the positive electrode sheet includes a cathode active material with a core-shell structure, and the cathode active material includes a core and a shell covering the core; the core has a chemical formula of Li1+xMn1-yAyP1-zRzO4; where the first coating layer includes a crystalline pyrophosphate LiaMP2O7 and/or a crystalline pyrophosphate Mb(P2O7)c, the second coating layer includes a crystalline phosphate XPO4, and the third coating layer is carbon; and the non-aqueous electrolyte includes a first lithium salt and a first additive, where the first lithium salt includes one or more selected from the group consisting of LiN(CmF2m+1SO2)(CnF2n+1SO2) and Li(FSO2)2N, where m and n each are a positive integer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.