State detecting system and device employing the same

• US 7,085,661 B2
• Filed: 01/10/2005
• Issued: 08/01/2006
• Est. Priority Date: 04/10/2002
• Status: Expired due to Term

• Current Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Shin-Kobe Electric Machinery Company Limited (Resonac Holdings Corp.)
• Inventors: Sasazawa, Kazuyoshi, Yoshihara, Shigeyuki, Emori, Akihiko, Miyazaki, Hideki, Mitsui, Toshisada, Hombu, Mitsuyuki, Kudou, Akihiko
• Primary Examiner(s): Hoff, Marc S.
• Assistant Examiner(s): Barbee, Manuel L.
• Application Number:
  US11/033,057
• Publication Number:
  US 20050119856A1
• Time in Patent Office: 568 Days
• Field of Search: 702/60, 702 63- 65, 702/85, 702/89, 702/123, 702/182, 702/183, 320/132, 320/149, 324/427, 324/428, 340/636.1, 340/636.12, 340/636.13, 340/636.15, 340/636.19, 340/636.2
• US Class Current: 702/63
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 50/16 with provision for separate direct mechanical propulsion
• CPC Class Codes: B60L 50/40 using propulsion power supplied by capacitors
• CPC Class Codes: B60L 50/51 characterised by AC-motors
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 8/003 Converting light into electric energy, e.g. by using photo-voltaic systems
• CPC Class Codes: B60W 10/26 for electrical energy, e.g. batteries or capacitors
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 20/13 in order to stay within battery power input or output limits; in order to prevent overcharging or battery depletion
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/374 with means for correcting the measurement for temperature or ageing
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 : Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 10/72 : Electric energy management in electromobility
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A state detecting system which can detect state of power storage at high precision even with lesser characteristic data to be used for calculation, and a device employing the same. The state detecting system has a memory for storing a characteristic data, calculation information, and set information, an arithmetic unit for calculating state information indicative of state of said power storage and calculating correction information for performing correction, a first correcting unit for correcting input of said arithmetic means, and a second correcting unit for correcting information stored or set in the storage.

Claims

1. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from an measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information; and

a correcting means for correcting said input information or an information stored in said memory means based on said correction information, wherein

when a current value in said power storage means is smaller than or equal to a predetermined value, one of a measured value by said measuring means, said result of calculation and a calculation procedure of said arithmetic means is taken as said set information to derive said correction information.

2. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from an measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating, when a charge state is decreased during charging or when the charge state is increased during discharging a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information; and

a correcting means for correcting said input information or an information stored in said memory means based on said correction information.

3. A state detecting system as claimed in claim 2, wherein

said storage means stores more than or equal to two mutually distinct calculation procedures, and

said correction information is derived on the basis of a difference of results of calculation by mutually distinct calculation procedures by said arithmetic means.

4. A state detecting system as claimed in claim 2, wherein

said arithmetic means has a charge state calculating means and a current integration means, and a capacity of said power storage means on use is calculated on the basis of two mutually different charge states and respective current integrated values.

5. A state detecting system as claimed in claim 2, wherein

said correction information is derived on the basis of relationship between a capacity of said power storage means in use and an initial capacity of said power storage means.

6. A state detecting system as claimed in claim 2, wherein

said correction information is derived on the basis of difference between variation amounts of a current integrated value of said power storage.

7. A state detecting system as claimed in claim 2, wherein

said measured information is at least one of voltage, current, temperature, resistance and electrolyte concentration.

8. A state detecting system as claimed in claim 2, wherein

said calculation information is at least one of calculation coefficient and calculation procedure.

9. A state detecting system as claimed in claim 2, wherein

said set information is at least one of a value set as a state which should be in normal condition in said power storage means, arithmetic expression and calculation procedure.

10. A state detecting system as claimed in claim 2, wherein

said state information is at least one of charge state and residual capacity of said power storage means.

11. A state detecting system as claimed in claim 2, which further comprises communication means for communicating the calculation result obtained from said arithmetic means to another device.

12. A power supply apparatus comprising:

a measuring means for measuring at least one of voltage, current, temperature, electric resistance and electrolyte concentration of said power storage means; and

a state detecting system for obtaining a state information of said power storage means based on a measured information measured by said measuring means;

wherein

said state detecting system comprises a state detecting system of claim 2.

13. A power storage means connected to a set of a commercial power source, a photovoltaic generation device and a load device, said set being connected mutually via selector switch, comprising:

a control converter connected via selector switch to a set of a commercial power source, a photovoltaic generation device and a load device, said set being connected mutually via selector switch;

a control apparatus for controlling an operation of selector switch and an operation of said control converter;

a power storage means connected to said control converter;

a measuring means for measuring at least on of voltage, current, temperature, electric resistance and electrolyte concentration of said power storage means; and

a state detecting system for obtaining a state information of said power storage means based on a measured information measured by said measuring means, wherein

said control converter controls an electric power between a set of a commercial power source, a photovoltaic generation device and a load device, said set being connected mutually via selector switch, and said power storage means;

said state detecting system comprises a state detecting system of claim 2; and

said control apparatus control an operation of said control converter based on an information provided by said state detection apparatus.

14. An apparatus for electric vehicle comprising:

a motor for driving a wheel;

a generator for generating electricity by means of rotation of said wheel;

a control converter connected to said motor and said generator;

a control apparatus for controlling an operation of said control converter;

a power storage means connected to said control converter;

a measuring means for measuring at least on of voltage, current, temperature, electric resistance and electrolyte concentration of said power storage means; and

a state detecting system for obtaining a state information of said power storage means based on a measured information measured by said measuring means, wherein

said control converter control electric power between said motor and said generator and said power storage means;

said state detecting system comprises a state detecting system of claim 2;

said state detecting system and said control apparatus may communicate each other by way of a communication means; and

said control apparatus controls an operation of said control converter based on an information provided by said state detecting system.

15. An apparatus for hybrid vehicle comprising:

a motor for assisting to drive a wheel driven by an internal combustion engine;

a generator for generating electricity by means of rotation of said wheel;

a control converter connected to said motor and said generator;

a control apparatus for controlling an operation of said control converter;

a power storage means connected to said control converter;

a measuring means for measuring at least one of voltage, current, temperature, electric resistance and electrolyte concentration of said power storage means; and

a state detecting system for obtaining a state information of said power storage means based on a measured information measured by said measuring means, wherein

said control converter control electric power between said motor and said generator and said power storage means;

said state detecting system comprises a state detecting system of claim 2;

wherein said state detecting system and said control apparatus communicate each other by way of a communication means; and

said control apparatus controls an operation of said control converter based on information provided by said state detecting system.

16. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from a measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information;

wherein

said arithmetic means comprises a means for calculating charge state of said power storage means and a means for integrating current of said power storage means; and

calculate an in-use capacity of said power storage means based on two different charge states and their current integration values.

17. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from a measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information;

wherein

said arithmetic means obtains said correction information based on a difference between a change in the current integration value of said power storage means and a change in the current integration value obtained by said arithmetic means.

18. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from an measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information; and

a correcting means for correcting said input information or an information stored in said memory means based on said correction information, wherein said correcting means updates the correcting based on obtained results while learning, wherein

said arithmetic means has a charge state calculating means and a current integration means, and a capacity of said power storage means on use is calculated on the basis of two mutually different charge states and respective current integrated values.

19. A state detecting system as claimed in claim 18, wherein

said storage means stores more than or equal to two mutually distinct calculation procedures, and

said correction information is derived on the basis of a difference of results of calculation by mutually distinct calculation procedures by said arithmetic means.

20. A state detecting system as claimed in claim 18, wherein

said correction information is derived on the basis of relationship between a capacity of said power storage means in use and an initial capacity of said power storage means.

21. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from an measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information; and

a correcting means for correcting said input information or an information stored in said memory means based on said correction information, wherein said correction information is calculated when there is overcharging or over-discharging detected during charging or discharging at a current smaller than or equal to a maximum allowable value, wherein

said arithmetic means has a charge state calculating means and a current integration means, and a capacity of said power storage means on use is calculated on the basis of two mutually different charge states and respective current integrated values.

22. A state detecting system as claimed in claim 21, wherein

said storage means stores more than or equal to two mutually distinct calculation procedures, and

said correction information is derived on the basis of a difference of results of calculation by mutually distinct calculation procedures by said arithmetic means.

23. A state detecting system as claimed in claim 21, wherein

said correction information is derived on the basis of relationship between a capacity of said power storage means in use and an initial capacity of said power storage means.

24. A state detecting system comprising:

a memory means for storing

a characteristic data of power storage means, obtained by calculation from an measured information obtained by measuring a measuring object of power storage means by way of measurement means;

a calculation information required for said calculation for said characteristic data; and

a set information to be defined for a characteristic or phenomenon specific to said power storage means as true set value or true logic, said set information set in advance;

an arithmetic means for

inputting an information stored in said memory means and said measured information as an input information;

calculating a state information indicating a state of said power storage means based on said input information and said calculation information; and

calculating a correction information for correcting an information stored in said memory means or said input information in case that it is required to correct an information stored in said memory means or said input information by comparing a result obtained by said calculation and said set information; and

a correcting means for correcting said input information or an information stored in said memory means based on said correction information, wherein said correction information is a direction of connection, and the correcting means corrects the input information or the information stored in the memory means by a preset amount in said direction of correction, wherein

said arithmetic means has a charge state calculating means and a current integration means, and a capacity of said power storage means on use is calculated on the basis of two mutually different charge states and respective current integrated values.

25. A state detecting system as claimed in claim 24, wherein

said correction information is derived on the basis of relationship between a capacity of said power storage means in use and an initial capacity of said power storage means.