APPARATUS FOR SELECTING SPECIFICATIONS OF POWER STORAGE SYSTEM AND METHOD FOR SELECTING SPECIFICATIONS OF POWER STORAGE SYSTEM

• US 20120181870A1
• Filed: 10/05/2009
• Published: 07/19/2012
• Est. Priority Date: 10/05/2009
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ichikawa, Shinji, Ishii, Daisuke
• Granted Patent: US 8,829,720 B2
• Time in Patent Office: Days
• US Class Current: 307/64
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

Abstract

A power storage system includes a power control unit including an inverter, and a battery for storing electrical energy supplied with commercial AC power by way of the inverter to supply the electrical energy to an electrical load. An apparatus for selecting specifications of a power storage system includes a data input interface unit for input of data obtained by measuring power usage during prescribed hours at a location of power consumption where the power storage system is to be installed, and an operation processing unit for finding annual average power usage during prescribed hours based on the measured data, and determining an output of the inverter based on the average power usage.

Claims

1. An apparatus for selecting specifications of a power storage system,

said power storage system including

an inverter configured to receive commercial AC power and convert the AC power to DC power, and

a power storage device for storing electrical energy supplied with said commercial AC power by way of said inverter to supply the electrical energy to an electrical load, said apparatus comprising:

an interface for input of data obtained by measuring power usage during prescribed hours at a location of power consumption where said power storage system is to be installed; and

an operation processing unit for finding annual average power usage during said prescribed hours based on measured said data, and determining an output of the inverter based on said average power usage, wherein

said operation processing unit adopts said power usage as the output of the inverter.

3. The apparatus for selecting specifications of a power storage system according to claim 1, further comprising a storage unit for holding predetermined compensation factors corresponding to a plurality of inverter outputs, respectively, wherein

said operation processing unit acquires from said storage unit a compensation factor corresponding to a selected output of the inverter, and calculates an actual amount of use out of said power usage available from said power storage device by multiplying, by acquired said compensation factor, an amount of power used in one day during said prescribed hours obtained based on a result of measuring said power usage, and determines a capacity of said power storage device based on said actual amount of use.

4. The apparatus for selecting specifications of a power storage system according to claim 3, further comprising a display unit for displaying the determined output of said inverter and the determined capacity of said power storage device.

2. (canceled)

5. A method for selecting specifications of a power storage system,

said power storage system including

an inverter configured to receive commercial AC power and convert the AC power to DC power, and

a power storage device for storing electrical energy supplied with said commercial AC power by way of said inverter to supply the electrical energy to an electrical load, said method comprising the steps of:

measuring power usage during prescribed hours at a location of power consumption where said power storage system is to be installed;

finding annual average power usage during said prescribed hours based on a result of measurement; and

determining an output of the inverter based on said average power usage, wherein

in said step of determining an output of the inverter, said average power usage is adopted as the output of the inverter.

7. The method for selecting specifications of a power storage system according to claim 5, further comprising the steps of:

acquiring a compensation factor corresponding to a selected output of the inverter from a predetermined map; and

calculating an actual amount of use out of said power usage available from said power storage device by multiplying, by acquired said compensation factor, an amount of power used in one day during said prescribed hours obtained based on a result of measuring said power usage, and determining a capacity of said power storage device based on said actual amount of use.

6. (canceled)