Pickling-free recovery process of battery electrode sheet
US12057560B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 6, 2022 |
| Grant date | Aug 6, 2024 |
| Priority date | — |
| Expiry date | Jun 6, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/84
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed in the present invention is a recovery process for a waste battery electrode sheet, the method comprising the following steps: subjecting a waste battery electrode sheet to shearing, drying and cold treatment, and then rolling and screening same to obtain a first positive electrode material and a first waste electrode sheet; subjecting the first waste electrode sheet to shearing, drying and cold treatment, and then rolling and screening same to obtain a second positive electrode material and a second waste electrode sheet; and roasting the first positive electrode material and the second positive electrode material to obtain a positive electrode powder. In the present invention, the aluminum content in the positive electrode material is reduced by means of step-by-step shearing, and the adhesion performance of a waste positive electrode plate binder is then reduced by means of vacuum freeze-drying and spraying with a quick-cooling agent. The aluminum foil of the positive electrode material does not easily break when being broken after vacuum freeze-drying, and the morphology and output of the aluminum foil after primary shearing and secondary shearing are basically unchan…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.