State detecting system and device employing the same

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.

What is claimed is:  
     
         1 . A state detecting system comprising: 
 a storage means for storing a characteristic data on a power storage means arithmetically obtained on the basis of measured information obtained by measuring a measuring object with respect to said power storage means by a measuring means, calculation information relating to said arithmetic operation of said data, and set information preliminarily set relating to said characteristic data and said calculation information;    an arithmetic means for calculating state information indicative of state of said power storage means on the basis of said measured information and set information and calculating correction information for performing correction by comparing a calculation result calculated and said set information; and    a first correcting means for correcting input of said arithmetic means on the basis of correction information obtained by said arithmetic means, or a second correcting means for correcting information stored or set in storage means based on correction information obtained by said arithmetic means.    
     
     
         2 . A state detecting system as claimed in  claim 1 , 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.    
     
     
         3 . A state detecting system as claimed in  claim 1 , 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 procedure by said arithmetic means.    
     
     
         4 . A state detecting system as claimed in  claim 1 , wherein 
 said arithmetic means has a charge state calculating means and a current integration means, 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 1 , wherein 
 said correction information is derived on the basis of relationship a capacity of said power storage means in use and an initial capacity of said power storage means stored in said storage means.    
     
     
         6 . A state detecting system as claimed in  claim 1 , 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 comprising: 
 a storage means for storing a characteristic data on a to a power storage means arithmetically obtained on the basis of the measured information obtained by measuring a measuring object with respect to said power storage means by measuring means, calculation information relating to said arithmetic operation of said data, and set information preliminarily set relating to said characteristic data and said calculation information,    an arithmetic means for calculating state information indicative of state of said power storage means on the basis of said measured information and set information and calculating correction information for performing correction by comparing a calculation result calculated and said set information,    said storage means storing more than or equal two of mutually different calculation procedures and said arithmetic means deriving said correction information on the basis of a difference of calculation results by said mutually different calculation procedure.    
     
     
         8 . A state detecting system comprising: 
 a storage means for storing a characteristic data on a power storage means arithmetically obtained on the basis of the measured information obtained by measuring a measuring object with respect to said power storage means by a measuring means, calculation information relating to said arithmetic operation of said data, and set information preliminarily set relating to said characteristic data and said calculation information; and    an arithmetic means for calculating state information indicative of state of said power storage means on the basis of said measured information and set information and calculating correction information for performing correction by comparing a calculation result calculated and said set information;    said arithmetic means having a charge state calculating means and current integration means of said power storage means, and calculating capacity of said power storage means on use on the basis of two different charge state and respective current integration values thereat.    
     
     
         9 . A state detecting system comprising: 
 a storage means for storing a characteristic data on a power storage means arithmetically obtained on the basis of the measured information obtained by measuring a measuring object with respect to said power storage means by a measuring means, calculation information relating to said arithmetic operation of said data, and set information preliminarily set relating to said characteristic data and said calculation information, and    an arithmetic means for calculating state information indicative of state of said power storage means on the basis of said measured information and set information and calculating correction information for performing correction by comparing a calculation result calculated and said set information,    said correction information being derived on the basis of relationship a capacity of said power storage means in use and an initial capacity of said power storage means stored in said storage means.    
     
     
         10 . A state detecting system comprising: 
 a storage means for storing a characteristic data on a power storage means arithmetically obtained on the basis of the measured information obtained by measuring a measuring object with respect to said power storage means by a measuring means, calculation information relating to said arithmetic operation of said data, and set information preliminarily set relating to said characteristic data and said calculation information; and    an arithmetic means for calculating state information indicative of state of said power storage means on the basis of said measured information and set information and calculating correction information for performing correction by comparing a calculation result calculated and said set information;    said correction information being derived on the basis of difference between a variation amount of a current integrated value of said power storage.    
     
     
         11 . A state detecting system as claimed in  claim 1 , wherein 
 said measured information is at least one of voltage, current, temperature, resistance and electrolyte concentration.    
     
     
         12 . A state detecting system as claimed in  claim 1 , wherein 
 said calculation information is at least one of calculation coefficient and calculation procedure.    
     
     
         13 . A state detecting system as claimed in  claim 1 , 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.    
     
     
         14 . A state detecting system as claimed in  claim 1 , wherein 
 said state information is at least one of charge state and residual capacity of said power storage means.    
     
     
         15 . A state detecting system as claimed in  claim 1 , which further comprises communication means for communicating the calculation result obtained from said arithmetic means to other device.  
     
     
         16 . A power source unit comprising: 
 a power storage means;    a measuring means for measuring at least one of voltage, current, temperature, electric resistance and electrolyte concentration; and    a state detecting system for deriving state information of said power storage means on the basis of measured information measured by said measuring means,    said state detecting system comprising state detecting system defined in  claim 1 .    
     
     
         17 . A power storage device comprising: 
 a commercial power source connected to a switch;    a photovoltaic generation device connected to said commercial power source via said switch;    a load device connected to said photovoltaic generation device via a switch;    a control converter controlling power of said commercial power source and said photovoltaic generation device and connected to said switch of said commercial power source via a switch;    a control unit commanding switching of said switch of said commercial power source and said switch of said control converter and commanding said power;    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; and    a state detecting system for deriving state information of said power storage means on the basis of measured information measured by said measuring means;    said state detecting system comprising the state detecting system defined in  claim 1 .    
     
     
         18 . An electric vehicle comprising: 
 a motor for driving wheel and a generator for generating an electric power by the revolution of said wheel, or a motor generator for driving said wheel and for generating an electric power by the revolution of said wheel;    a control converter connected to said motor and said generator or said motor generator, for converting the electric power thereof;    a control unit for instructing said power 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; and    a state detecting system deriving state information of said power storage means on the basis of measured information measured by said measuring means;    said state detecting system comprising the state detecting system defined in  claim 1 , and    said control unit being controlled by a communication means.    
     
     
         19 . A hybrid vehicle comprising: 
 an internal combustion engine;    a motor connected to said engine, for assisting the driving force for wheels and a generator for generating an electric power by revolution of said wheels, or a motor-generator connected to said engine, for assisting the driving force and for generating the electric power;    a control converter connected to said motor and said generator or to said motor generator, for converting the electric power thereof;    a control unit for commanding the electric power 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, and a state detecting system for deriving state information of said power storage means on the basis of the measured information measured by said measuring means,    said state detecting system comprising state detecting system defined in  claim 1 , and    said control unit being controlled by a communication means.