Abstract
In NHK, many TV-FM relay stations have been installed all over the land so that TV-FM broadcasting can be received universally at each home. Most of small-scale TV・FM relay stations equip BF (Battery Float) system and it is useful to a power supply reservation at the time of a power failure. However, the correspondence to the degradation diagnosis of battery has been a subject towards a stable power supply. Consequently, we propose the management technique of the battery which enables increase in efficiency and reliability by introducing the degradation index which is evaluated by the battery degradation degree. The technique aims to save labor of battery management and to contribute to the stable employment of TV・FM relay stations by combining with the Battery Monitor System developed at the NHK Oita Broadcasting Station.
