Remaining battery capacity meter and method for computing remaining capacity
US5691078A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Nov 21, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An inexpensive, high precision accumulation type remaining battery capacity meter and method are provided, whereby the remaining capacity of the battery is determined by computing an accumulated discharge value and is displayed in steps on a display unit. The meter includes a memory device with at least one data table relating the terminal voltage of a battery discharging at a predetermined discharge current or discharge power to the remaining capacity of the battery. The data table is used to correct the computed remaining capacity displayed on the display unit. Corrections are only made within a specified range so that abnormal change in the displayed capacity is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.