Protective device for secondary batteries
US6060185A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 1997 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Oct 29, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention provides a protective device for batteries having a high energy density such as lithium ion batteries. The protective device comprises a battery voltage-monitoring means, an overcharge-detecting means for sending out a charge-finishing signal when a voltage detected by the battery voltage-detecting means is higher than a preset value, a charge-finishing means for finishing charge in response to the charge-finishing signal, an output-counting means for counting the number of charge-finishing signals sent out of the charge-finishing means, and a cutoff means for cutting off conduction of a current in said batteries when a counted value reaches a preset value, thereby limiting the number of permissible overcharging cycles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.