Method for repairing performance of retired lithium ion battery
A lithium-ion battery and performance technology, which is applied in the field of repairing the performance of decommissioned lithium-ion batteries, can solve the problems of insufficient improvement in battery cycle life and service performance, insufficient uniformity, and compactness, and achieve good battery consistency, battery capacity and Improved cycle performance and extended life
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0043] Example 7: After sample F is used, the battery is discharged to 2.75V at a constant current of 21A, and the battery capacity C0 decays to 29Ah, which is 69.0% of the initial rated capacity C (42Ah). Then, in a constant 45℃ aging room, the battery is charged at a constant current and voltage of 8.4A (0.2C) for 500 minutes, the cut-off current is 0.84A, and the upper charging voltage is 4.2V; then, in the aging room at the same temperature, Discharge to 2.75V with a constant current of 8.4A (0.2C); repeat the process, charge and discharge the battery 3 times, and the repair is complete.
[0044] In a normal temperature environment, the repaired battery is charged to 4.2V at a constant current and voltage of 21A, with a cut-off current of 0.84A, and then discharged to 2.75V at a constant current of 21A. The battery discharge capacity C1 was 39Ah. After repair, the capacity C1 recovered to 92.9% of the initial rated capacity C, an increase of 23.9%. See the comparison of disc...
Example Embodiment
[0046] Example 8: After sample L is used, the battery is discharged to 2.75V at a constant current of 1.3A, and the battery capacity C0 decays to 1.8Ah, which is 69.2% of the initial rated capacity C (2.6Ah). Then, in a constant 45℃ aging room, the battery is charged at a constant current and voltage of 0.52A (0.2C) for 500 minutes, the cut-off current is 0.052A, and the upper limit voltage of charging is 4.2V; then, in the aging room at the same temperature, Discharge to 2.75V at a constant current of 0.52A (0.2C); repeat this, charge and discharge cycles 3 times, and repair is complete.
[0047] In a normal temperature environment, the repaired battery is charged to 4.2V at a constant current and voltage of 1.3A, with a cut-off current of 0.052A, and then discharged to 2.75V at a constant current of 1.3A. The battery discharge capacity C1 was 2.4Ah. After repair, the capacity returned to 92.3% of the initial rated capacity C, an increase of 23.1%. See the comparison of dischar...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap