Degassing hole formation process and degassing hole formation apparatus for secondary battery
US10121999B2 · kind B2 · utility
2Cited by
1References
8Claims
0Family size
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Key dates
| Filing date | Dec 3, 2014 |
| Grant date | Nov 6, 2018 |
| Priority date | — |
| Expiry date | Aug 30, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A degassing hole is formed in a casing in which a storage element is housed. Prior to forming the degassing hole, the casing is clamped in a region between the outer peripheral edge of the casing and the storage element where the degassing hole is to be formed such that overlapped films of the casing are pressed tightly together. By displacing the acting position of the clamping force toward the storage element while reducing the clamping force gradually toward the storage element prevent, liquid spill in a degassing process is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.