Battery charging operation and a detection of a fully charged condition of the charged battery
US5998970A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A microcomputer performs a total of 100 sampling actions during a 1 sec sampling period for obtaining a plurality of battery voltage data V. In each sampling period, a minimum value .upsilon.min and a maximum value .upsilon.max are stored in a RAM 53. A peak value VMAX, used for detecting a peak battery voltage in the charging operation, is renewed by a largest data among the sampled minimum values .upsilon.min. A differenc .DELTA.V between the peak value VMAX and the maximum value .upsilon.max is calculated the end of each sampling period. And, when the calculated difference .DELTA.V exceeds a predetermined value, a judgement is made that the battery is fully charged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.