| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress a sharpening commercial power demand curve with a simple facility and to increase the utilization efficiency of the facility by providing a lithium ion secondary battery charged by the commercial power in the time zone other than the peak time of a commercial power demand and discharged in the peak time zone for lighting power. SOLUTION: In this lighting system 10, a rectifier 12 is connected to a lithium ion secondary battery 14 to charge the battery 14 from 3 o'clock a.m., and the battery 14 is connected to a lighting switch 15 to light a fluorescent lamp 17 via an inverter circuit 16 from 1 o'clock p.m., for example. The depth of discharge of the battery 14 of the lighting system 10 is set to 50% in the new article state. If the battery 14 cannot be discharged in the peak time zone of a power demand, the aging deterioration of the battery 14 can be suppressed by increasing the depth of discharge of the battery 14 by 10%. When the battery 14 is used to the lowest discharging voltage, the battery is replaced based on its report, and a fluorescent lamp 17 can be lighted and controlled at least by the discharging voltage from the battery 14 in the peak time zone of the power demand.</p> |
