Title :
A function of the battery capacity evaluation in telecommunications power systems
Author :
Murase, Masatoshi ; Yoshida, Makoto ; Sekiya, Kazuyuki ; Yamashita, Nobiihiko ; Yamashita, Takashi ; Hirai, Toshiro
Author_Institution :
NTT Technol. & Dev. Support Center, Chiba, Japan
Abstract :
This paper describes the evaluation method of VRLA battery deterioration in telecommunications power systems. The rectifier output voltage becomes lower than the rated float voltage of the battery during the test period, which is about 30% of the full-discharge time of the fresh and fully charged battery. Battery discharge time is estimated from the battery discharge voltage characteristics during this period. The degradation rate is determined by comparing the estimated battery discharge time and discharge time of a fresh and fully charged battery. In field tests, the accuracy of estimating battery deterioration was about 20%
Keywords :
AC-DC power convertors; lead; rectifying circuits; secondary cells; telecommunication power supplies; Pb; VRLA battery deterioration; battery capacity evaluation; degradation rate; discharge time; discharge voltage characteristics; field tests; rated float voltage; rectifier output voltage; telecommunications power systems; valve-regulated Pb-acid secondary batteries; Battery charge measurement; Circuit testing; Current measurement; Fault location; Power supplies; Power systems; Rectifiers; System testing; Temperature; Voltage;
Conference_Titel :
Telecommunications Energy Conference, 1997. INTELEC 97., 19th International
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-3996-7
DOI :
10.1109/INTLEC.1997.646055
