Patent ID: 6323620
Filing Date: 2001-11-27
Classification: G01R,H01M,H02J,Y02E

Abstract:
An electric power system using an electric power storing secondary battery, in which electric power is stored in the nighttime and used in the daytime via an ac/dc converter; said system comprising: an electric power meter which measures the charged power that is charged from a generating facility into the electric power storing secondary battery via the ac/dc converter, and also measures the discharged power that is supplied from the electric power storing secondary battery to a load via the ac/dc converter; and a processing unit which calculates a difference of electric power fee from the quantity of charged power and quantity of discharged power measured by the electric power meter and respective unit prices of electric power, and then calculates the price for using the electric power storing secondary battery based on the difference of the electric power fee or on the difference of the electric power fee and the difference between the minimum power fees before and after the employment of the electric power storing secondary battery.