BATTERY CALIBRATION SYSTEM FOR DISCHARGING A RECHARGEABLE BATTERY AND GENERATING AN AC DETECT SIGNAL TO POWER MANAGEMENT LOGIC TO MAINTAIN NORMAL COMPUTER OPERATION EVEN WHEN BATTERY IS BELOW CERTAIN LEVEL
US6463545B1 · kind B1 · utility
18Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1999 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Oct 1, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/263
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A laptop computer system executes automatic battery calibration to improve the accuracy of the battery's internal charge monitor. The calibration procedure drains the battery to approximately 0% of charge capacity during normal computer operation, permitting a user to operate the computer without risking power failure when the battery discharges. The computer returns to normal operation if either the AC power or the battery is removed. During the calibration procedure, the computer system prevents power management software from forcing shut down before the battery completely drains.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.