Energy storage device including a rigidity changing part disposed in a vicinity of a joint portion of a first member and a second member
US10593926B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2017 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Aug 8, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An energy storage device includes a positive electrode current collector and a negative electrode current collector which respectively have electric conductivity and are joined to each other, and cover members. The energy storage device includes swaged joint portions which join the positive electrode current collector and the cover members to each other, and are engaged with each other by fitting engagement by a concavo-convex fitting engagement structure which projects from the positive electrode current collector toward the cover members, and swaged joint portions which join the negative electrode current collector and the cover members to each other and, are engaged with each other by fitting engagement by a concavo-convex fitting engagement structure which projects from the negative electrode current collector toward the cover members. The cover members respectively include a strip-shaped projection which forms a rigidity changing part on the side of the swaged joint portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.