Method of manufacturing secondary battery
US10938057B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2018 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Oct 9, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of manufacturing a secondary battery including an electrode body including a positive electrode plate and a negative electrode plate, an outer package including an opening and housing the electrode body, a sealing plate sealing the opening, a negative electrode terminal attached to the sealing plate, a negative electrode tab portion provided in the negative electrode plate, and a negative electrode collector electrically connecting the negative electrode tab portion and the negative electrode terminal to each other, the method including welding a flange portion of the negative electrode terminal and the negative electrode collector together by projecting an energy ray, the negative electrode collector includes, before the welding, a rough surface portion, and in the welding, the flange portion of the negative electrode terminal and the negative electrode collector are connected by welding by projecting an energy ray onto the rough surface portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.