Method and apparatus for measuring the voltage and charge of a battery
US5144248A · kind A · utility
185Cited by
7References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 1989 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | May 22, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/21
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for measuring the voltage and state of charge of a secondary battery. The voltage and state of charge values are taken by a circuit every four (4) seconds by reading voltage, waiting two (2) seconds, reading current, waiting two (2) seconds, and repeating the voltage readings and the current readings. The circuit includes a 4-bit microprocessor, CMOS analog switches, and two operational amplifiers. The voltage and current readings are taken from dual-sloped converters, and the values determined by software algorithms in the microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.