Method and device for monitoring the state of charge of a storage battery
US4307330A · kind A · utility
29Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1979 |
| Grant date | Dec 22, 1981 |
| Priority date | — |
| Expiry date | Nov 28, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00714
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Monitoring the state of charge consists of providing a magnitude g (e.g. a frequency F1) which is proportional to the storage battery charging or discharge current I (sensed at 2) and of algebraically integrating said magnitude (e.g. in an up/down counter K4, K5) into data which is the image of the state of charge of the storage battery; the proportionality constant a=g/I between said magnitude and said current being given a lower value during charging than during discharging, and the value of the constant a being varied during charging as an increasing function of the current I.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.