Safety device and secondary battery using the same
US6335109B1 · kind B1 · utility
3Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Apr 27, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A safety device having a thin plate of a brittle material adapted to be ruptured by a difference between pressures exerted on opposite sides thereof; and a conductive path provided on the thin plate and adapted to be cut off by the rupture of the thin plate. One surface of the thin plate is present in a reference pressure chamber. The safety device with its reference pressure chamber being sealed is incorporated in a secondary battery. When the secondary battery is overcharged, the pressure difference between the opposite sides of the thin plate is increased, so that the thin plate is ruptured to cut off the conductive path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.