Record medium recording equivalent circuit model of electricity storage element, derivation program, record medium thereof, derivation apparatus, simulation program, record medium thereof, simulation apparatus, method of designing, method for conforming/nonconforming decision, and conforming/nonconforming decision apparatus

• US 20050267724A1
• Filed: 05/17/2005
• Published: 12/01/2005
• Est. Priority Date: 05/26/2004
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Niki, Kazuya, Moriya, Osamu
• Application Number:
  US11/130,242
• Publication Number:
  US 20050267724A1
• Time in Patent Office: Days
• US Class Current: 703/14
• CPC Class Codes: G06F 30/367 Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods

Abstract

A computer-readable record medium, recording an equivalent circuit model of an electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal, records the equivalent circuit model including a first circuit corresponding to an electricity storage unit and a second circuit corresponding to a terminal unit and connected in series with the first circuit, wherein the first circuit includes at least one series circuit including a first parallel circuit and a second parallel circuit connected in series, the first parallel circuit includes a first resistance and a first inductance connected in parallel with the first resistance, and the second parallel circuit includes a second resistance and a capacitance connected in parallel with the second resistance.

Claims

1. A computer-readable record medium recording an equivalent circuit model of an electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

a first inductance connected in parallel with said first resistance; and

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance.

2. The computer-readable record medium recording an equivalent circuit model according to claim 1, wherein

said first circuit includes one said first series circuit.

3. The computer-readable record medium recording an equivalent circuit model according to claim 2, wherein

said first circuit further includes a second series circuit connected in parallel with said first series circuit, and

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance.

4. The computer-readable record medium recording an equivalent circuit model according to claim 1, wherein

said second circuit includes

a second inductance and

a fourth resistance connected in series with said second inductance.

5. A program to be executed by a computer for derivation of an equivalent circuit model of an electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said program allows a computer to execute the steps of

accepting a frequency characteristic of the real part of the measured impedance of said electricity storage element and

optimizing each value of an element forming said first circuit to approximate a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model to the frequency characteristic of the real part of said measured impedance.

6. The program to be executed by a computer according to claim 5, wherein

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said inductance and said first capacitance,

a second step of calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said inductance and said first capacitance, and

a third step of repeating said first step and said second step until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

7. The program to be executed by a computer according to claim 5, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit,

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance, and

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance,

a second step of calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance, and

a third step of repeating said first step and said second step until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

8. A computer-readable record medium recording the program according to claim 5.

9. A program to be executed by a computer for a simulation of electric characteristics of an electric circuit having an electricity storage element using an equivalent circuit model of said electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said program allows a computer to execute the steps of

accepting a circuit model of said electric circuit including the equivalent circuit model of said electricity storage element,

accepting a simulation condition,

calculating said electric characteristics based on the circuit model of said electric circuit and the simulation condition, and

outputting calculated electric characteristics.

10. The program to be executed by a computer according to claim 9, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit, and

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance.

11. A computer-readable record medium recording the program according to claim 9.

12. A method of designing an electricity storage element to set electric characteristics of an electric circuit having said electricity storage element to desired electric characteristics using an equivalent circuit model of said electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said method comprising the steps of;

making a circuit model of said electric circuit including the equivalent circuit model of said electricity storage element;

determining said desired electric characteristics;

optimizing each value of an element forming said first circuit to approximate the electric characteristics of the circuit model of said electric circuit to said desired electric characteristics; and

fabricating said electricity storage element based on each optimized value of the element forming said first circuit.

13. The method of designing an electricity storage element according to claim 12, wherein

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said inductance and said first capacitance,

a second step of calculating the electric characteristics of the circuit model of said electric circuit using varied values of said first resistance, said second resistance, said inductance and said first capacitance, and

a third step of repeating said first step and said second step until calculated electric characteristics of the circuit model of said electric circuit approximate to said desired electric characteristics.

14. The method of designing an electricity storage element according to claim 12, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit,

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance, and

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance,

a second step of calculating the electric characteristics of the circuit model of said electric circuit using varied values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance, and

a third step of repeating said first step and said second step until calculated electric characteristics of the circuit model of said electric circuit approximate to said desired electric characteristics.

15. A method of making a conforming/nonconforming decision for an electricity storage element using an equivalent circuit model of said electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said method comprising the steps of;

obtaining a frequency characteristic of the real part of the measured impedance of said electricity storage element;

optimizing each value of an element forming said first circuit to approximate a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model to the frequency characteristic of the real part of said measured impedance; and

deciding that said electricity storage element is a conforming item if each optimized value of the element forming said first circuit is within a predetermined range.

16. The method of making a conforming/nonconforming decision for an electricity storage element according to claim 15, wherein

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said inductance and said first capacitance,

a second step of calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said inductance and said first capacitance, and

a third step of repeating said first step and said second step until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

17. The method of making a conforming/nonconforming decision for an electricity storage element according to claim 15, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit,

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance, and

said step of optimizing includes

a first step of varying respective values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance,

a second step of calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance, and

a third step of repeating said first step and said second step until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

18. An apparatus for deriving an equivalent circuit model of an electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said apparatus comprising;

a portion for accepting a frequency characteristic of the real part of the measured impedance of said electricity storage element; and

a portion for optimizing each value of an element forming said first circuit to approximate a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model to the frequency characteristic of the real part of said measured impedance.

19. The apparatus for deriving an equivalent circuit model according to claim 18, wherein

said portion for optimizing includes

a first portion for varying respective values of said first resistance, said second resistance, said inductance and said first capacitance and

a second portion for calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said inductance and said first capacitance, and

said first portion and said second portion repeat operations until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

20. The apparatus for deriving an equivalent circuit model according to claim 18, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit,

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance, and

said portion for optimizing includes

a first portion for varying respective values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance and

a second portion for calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance, and

said first portion and said second portion repeat operations until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

21. An apparatus for performing a simulation of electric characteristics of an electric circuit having an electricity storage element using an equivalent circuit model of said electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with

said first circuit;

said first circuit includes at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a capacitance connected in parallel with said second resistance; and

said apparatus comprising;

a portion for accepting a circuit model of said electric circuit including said equivalent circuit model;

a portion for accepting a simulation condition;

a portion for calculating said electric characteristics based on the circuit model of said electric circuit and the simulation condition; and

a portion for outputting calculated electric characteristics.

22. The apparatus for performing a simulation of electric characteristics according to claim 21, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit, and

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance.

23. An apparatus for making a conforming/nonconforming decision for an electricity storage element using an equivalent circuit model of said electricity storage element wherein a real part of an equivalent impedance varies to approximate to a real part of a measured impedance according to a frequency of an applied AC signal;

wherein

said equivalent circuit model includes

a first circuit corresponding to an electricity storage unit and

a second circuit corresponding to a terminal unit and connected in series with said first circuit;

said first circuit includes

at least one first series circuit including a first parallel circuit and a second parallel circuit connected in series;

said first parallel circuit includes

a first resistance and

an inductance connected in parallel with said first resistance;

said second parallel circuit includes

a second resistance and

a first capacitance connected in parallel with said second resistance; and

said apparatus comprising;

a portion for obtaining a frequency characteristic of the real part of the measured impedance of said electricity storage element;

a portion for optimizing each value of an element forming said first circuit to approximate a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model to the frequency characteristic of the real part of said measured impedance; and

a portion for deciding that said electricity storage element is a conforming item if each optimized value of the element forming said first circuit is within a predetermined range.

24. The apparatus for making a conforming/nonconforming decision for an electricity storage element according to claim 23, wherein

said portion for optimizing includes

a first portion for varying respective values of said first resistance, said second resistance, said inductance and said first capacitance and

a second portion for calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said inductance and said first capacitance, and

said first portion and said second portion repeat operations until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.

25. The apparatus for making a conforming/nonconforming decision for an electricity storage element according to claim 23, wherein

said first circuit includes

one said first series circuit and

a second series circuit connected in parallel with said first series circuit,

said second series circuit includes

a third resistance and

a second capacitance connected in series with said third resistance, and

said portion for optimizing includes

a first portion for varying respective values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance and

a second portion for calculating a frequency characteristic of the real part of the equivalent impedance of said equivalent circuit model using varied values of said first resistance, said second resistance, said third resistance, said inductance, said first capacitance, and said second capacitance, and

said first portion and said second portion repeat operations until a calculated frequency characteristic of the real part of the equivalent impedance approximates to the frequency characteristic of the real part of the measured impedance of said electricity storage element.