Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Reexamination Certificate
2000-08-29
2001-11-27
Tso, Edward H. (Department: 2838)
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
Reexamination Certificate
active
06323620
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a use system and application of an electric power storing secondary battery that is effective for load leveling.
A load leveling system which stores electric power in the nighttime and uses it in the daytime employing an electric power storing secondary battery, as disclosed in Japanese Application Patent Laid-Open Publication Nos. Hei 8-287958 (1996), Hei 8-138731 (1996), and Hei 11-233137 (1999), is expected to be used widely in future because the system is very much effective for diminishing the necessity for constructing a generating facility and transmission/transformation equipment corresponding to the peak power in the daytime and for improving the utilization factor of the generating facility and transmission/transformation equipment.
An electric power storing secondary battery could be located in a substation in the suburb of a city but more locations are needed for expanded utilization. Besides, since the locations are desired to be closer to the electric power consumers for minimizing transmission equipment, it is preferred that the electric power storing secondary battery be installed near at hand an electric power consumer. If, however, the electric power consumer is to own the electric power storing secondary battery and utilize it in a building, apartment house, or solitary island, the electric power consumer must have knowledge and capability of operating, maintaining and managing the electric power storing secondary battery. This has been an obstacle to the popularization of the electric power storing secondary battery. This problem is particularly serious if a sodium-sulfur battery or the like that contains hazardous material is used as the electric power storing secondary battery, that is, a qualified hazardous material operator is required for the operation because of the regulation of the Fire Fighting Law. This has made it difficult for a power user to operate, maintain and manage the electric power storing secondary battery.
If an electric power consumer is to employ an electric power storing secondary battery, it is important for the popularization that the purchase cost of the electric power storing secondary battery can be covered with the difference between the daytime power fee and the nighttime power fee. In case an electric power consumer is to purchase an electric power storing secondary battery, however, the electric power consumer has to make an initial investment in the equipment and, although it could be recovered after years of continued utilization, this has been an obstacle to the popularization.
There is another problem. If the electric power storing secondary battery is to be installed at a place like a building, apartment house, or solitary island, where multiple electric power consumers are resident, more batteries and wider space are required so that each electric power consumer is equipped with individual electric power storing secondary battery.
SUMMARY OF THE INVENTION
The objective of the present invention is to provide a use system and application of an electric power storing secondary battery which eliminates the aforementioned deficiencies in the prior art, is effective for the popularization of the electric power storing secondary battery, and is capable of producing a load leveling effect.
The first use system of an electric power storing secondary battery of the present invention is characterized in that the use system of 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, comprises 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.
The second use system of an electric power storing secondary battery of the present invention is characterized in it that the use system of 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, comprises 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 the price for using the electric power storing secondary battery based on the balance calculated from the quantity of charged power and quantity of discharged power measured by the electric power meter and respective unit prices of electric power or based o the quantity of charged power and quantity of discharged power, the balance, and the difference between the minimum power fees before and after the employment of the electric power storing secondary battery.
The first application of an electric power storing secondary battery of the present invention is characterized in that, in the application of 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, the charged power that is charged from a generating facility into the electric power storing secondary battery via the ac/dc converter is measured; the discharged power that is supplied from the electric power storing secondary battery to a load is measured; a difference of electric power fee is calculated from the measured quantity of charged power and quantity of discharged power and respective unit prices of electric power;
and the price for using the electric power storing secondary battery is calculated based on the difference of the electric power fee or on the difference between the minimum power fees before and after the employment of the electric power storing secondary battery.
The second application of a power storage battery of the present invention is characterized in that, in the application of 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, the charged power that is charged from a generating facility into the electric power storing secondary battery via the ac/dc converter is measured, the discharged power that is supplied from the electric power storing secondary battery to a load is measured; and the price for using the electric power storing secondary battery is calculated based on the balance calculated from the measured quantity of charged power and quantity of discharged power and respective unit prices of electric power or based on the quantity of charged power and quantity of discharged power, the balance, and the difference between the minimum power fees before and after the employment of the electric power storing secondary battery.
According to the present invention, the price for using the electric power storing secondary battery can be calculated including the price for using the ac/dc converter. In addition, in the application of an electric power storing secondary battery, it is preferred that discharged power is supplied from a single power storage unit to multiple loads, and the discharged power fee to each load is calculated, that discharged power is supplied to multiple loads via a single ac/dc converter that is provided for the electric power storing secon
Madokoro Manabu
Miyoshi Tadahiko
Hitachi , Ltd.
Mattingly Stanger & Malur, P.C.
Tso Edward H.
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