80ahリチウムイオン電池を適用したラックマウント型直流電源システムのフィールド試騳

摘要

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) offering actual services. A nominal output voltage and maximum output current of the system is 53.5 V and 20 A, respectively. An 80-Ah lithium-ion battery composed of 13 cells connected in series was applied in the system and maintained in a floating charge method. The DC-power-supply system was installed in a 19-inch power rack in the telecommunications equipment box at BTS. The characteristics of the 80 Ah lithium-ion battery, specifications of the DC-power-supply system and field-test results were shown in this paper.%これまで，リチウムイオン電池（Liイオン電池）は，エrnネルギー密度の高さが着目され，携帯電話，ラップトップrnコンピュータ等の各種小型の携帯用電子機器の電源としてrn使用されてきた。一方，このようなエネルギー密度の高さrnが着目され，これまで宇宙用や潜水艇用の大容量電池の開rn発が進み，近年では，ハイブリッド自動車用，電気自動rn車用電池としての積極的な開発が進められている。