Electrode plate and battery cell of wound lithium-ion battery and method for manufacturing same
US11322807B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 28, 2019 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | Feb 28, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are an electrode plate and a battery cell of a wound lithium-ion battery and a method for manufacturing same. The electrode plate comprises an electrode plate body and at least two groups of tabs arranged on the electrode plate body, with each group of tabs including multiple tabs, wherein the multiple tabs have equal intervals therebetween, and the widths of the multiple tabs are successively increased by 2πΔt, with Δt being the sum of the thicknesses of a positive electrode plate, a negative electrode plate and two layers of a separation film of the battery cell of the lithium-ion battery. The present invention can avoid the problem in the prior art of burrs on an electrode plate due to secondary die-cutting, and can reduce the possibility of self-discharge of the battery. Since the body of each tab is completely coated with an electrode material, the energy density is high, thereby improving the safety of the battery. By means of slightly adjusting the widths of the tabs, continuous production is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.