Field trial on a rack-mounted DC power-supply system using an 80-Ah lithium-ion backup battery

Author

Matsushima, Toshio ; Suzuki, Nobuhiko

Author_Institution

NTT Facilities R&D Headquarters, Tokyo

fYear

2008

fDate

14-18 Sept. 2008

Firstpage

1

Lastpage

6

Abstract

Using an industrial lithium-ion battery that has higher energy density than conventional valve-regulated lead-acid batteries, a rack-mounted DC-power-supply system was assembled and tested at a base transceiver station (BTS) during actual service. The nominal output voltage of the system is 53.5 V and the maximum output current is 20 A. An 80-Ah lithium-ion battery composed of 13 cells connected in series was used and maintained by the floating charge method. The DC-power-supply system was installed in a 19-inch power rack in the telecommunications equipment box at the BTS. The characteristics of the 80-Ah lithium-ion battery, specifications of the DC-power-supply system and field-test results are presented here.

Keywords

emergency power supply; lead acid batteries; secondary cells; telecommunication equipment; telecommunication power supplies; transceivers; Li; Pb; base transceiver station; current 20 A; energy density; floating charge method; industrial lithium-ion battery; lithium-ion backup battery; rack-mounted DC power-supply system; telecommunications equipment box; valve-regulated lead-acid batteries; voltage 53.5 V; Assembly systems; Base stations; Batteries; Electricity supply industry; Emergency power supplies; Portable computers; Power supplies; Research and development; System testing; Voltage; DC-power-supply system; cell-voltage-equalizing circuit; float charge; lithium-ion cell;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications Energy Conference, 2008. INTELEC 2008. IEEE 30th International

Conference_Location

San Diego, CA

Print_ISBN

978-1-4244-2055-1

Electronic_ISBN

978-1-4244-2056-8

Type

conf

DOI

10.1109/INTLEC.2008.4664123

Filename

4664123