Nonaqueous electrolyte secondary battery
US10535860B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 2016 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01M2200/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A nonaqueous electrolyte secondary battery includes a conductive outer can, an electrode body in the outer can, a conductive seal plate tightly closing an open end of the outer can, and a cathode external terminal on the seal plate. The battery further includes a current cutoff mechanism (CID). The CID is located on the electrical conduction pathway between the cathode external terminal and the electrode body and interrupts the electrical coupling therebetween in response to an increased internal pressure in the battery. The CID includes a thin portion of the seal plate and a diaphragm. The diaphragm deforms to interrupt the electrical coupling between the cathode external terminal and the electrode body in response to the increase in the internal pressure in the battery. A cathode collector lead electrically couples the electrode body and the seal plate, and the seal plate connects the diaphragm and the cathode collector lead.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.