WO2014155447A1 - Dispositif de détermination de durée de vie restante, système de détermination de durée de vie restante, et procédé de détermination de durée de vie restante - Google Patents

Dispositif de détermination de durée de vie restante, système de détermination de durée de vie restante, et procédé de détermination de durée de vie restante Download PDF

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Publication number
WO2014155447A1
WO2014155447A1 PCT/JP2013/006749 JP2013006749W WO2014155447A1 WO 2014155447 A1 WO2014155447 A1 WO 2014155447A1 JP 2013006749 W JP2013006749 W JP 2013006749W WO 2014155447 A1 WO2014155447 A1 WO 2014155447A1
Authority
WO
WIPO (PCT)
Prior art keywords
lead battery
life
circuit voltage
open circuit
internal resistance
Prior art date
Application number
PCT/JP2013/006749
Other languages
English (en)
Japanese (ja)
Inventor
琢磨 飯田
将弘 河口
和成 安藤
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2014155447A1 publication Critical patent/WO2014155447A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/06—Lead-acid accumulators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/392—Determining battery ageing or deterioration, e.g. state of health
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/389—Measuring internal impedance, internal conductance or related variables
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a life determination device, a life determination system, and a life determination method for determining the life of a lead battery.
  • Secondary batteries that can be charged and discharged are used for electric vehicles, hybrid vehicles, and the like.
  • the lifetime of the secondary battery is finite, and the performance of the secondary battery decreases as it is used. Therefore, it is preferable to determine the life of the secondary battery and take necessary measures such as replacement for the secondary battery having a short life.
  • Patent Document 1 Since Patent Document 1 has a relationship that the battery capacity (life) of a secondary battery increases as the internal resistance decreases, an invention for determining the degree of deterioration (life) of the secondary battery based on the internal resistance is disclosed. Are listed.
  • some lead batteries have a low battery capacity (within the range A in FIG. 1) even if the internal resistance is low, as shown in FIG. If the lifetime is determined based only on the determination, the determination accuracy is lowered.
  • An object of the present invention is to provide a life determination device, a life determination system, and a life determination method that can improve the accuracy of the life determination of a lead battery.
  • the life determination apparatus of the present invention includes an open circuit voltage estimation unit that estimates an open circuit voltage of a lead battery, and a determination unit that determines the life of the lead battery by comparing the open circuit voltage with a first threshold value. take.
  • the life determination system of the present invention includes a current measurement unit that measures a current flowing in a lead battery, a voltage measurement unit that measures a voltage of the lead battery, and an open circuit voltage of the lead battery based on the current and voltage of the lead battery.
  • An open circuit voltage estimating unit for estimating the life of the lead battery by comparing the open circuit voltage with a first threshold is employed.
  • the life determination method of the present invention includes an open circuit voltage estimation step for estimating an open circuit voltage of a lead battery, and a determination step for determining the life of the lead battery by comparing the open circuit voltage with a first threshold value.
  • the life determination accuracy of the lead battery can be improved by performing the life determination based on the open circuit voltage before performing the life determination based on the internal resistance for the lead battery.
  • the figure which shows the relationship between the battery capacity (horizontal axis) and internal resistance (vertical axis) of the lead battery The figure which shows the relationship between the battery capacity (horizontal axis) of the lead battery and the open circuit voltage (vertical axis)
  • the figure which shows the structure of the lifetime determination system which concerns on one embodiment of this invention Diagram showing the relationship between the current (horizontal axis) and voltage (vertical axis) of a lead battery
  • the inventor of the present invention among lead batteries, has a low internal resistance and a low battery capacity (in the range of A in FIG. 1). ) Is large, the battery capacity is low, and the open circuit voltage (OCV) after full charge is low (in the range of B in FIG. 2). I arrived.
  • FIG. 3 is a diagram showing a configuration of the life determination system according to the first embodiment of the present invention.
  • the life determination system 1 mainly includes a voltage measurement unit 10, a temperature measurement unit 20, a current measurement unit 30, an environmental temperature sensor 40, and a life determination device 50. .
  • the lead battery 2 has a substantially rectangular battery case serving as a battery container.
  • An electrode plate group is accommodated in the battery case.
  • a polymer resin such as polyethylene (PE) is used as the material of the battery case.
  • PE polyethylene
  • Each electrode plate group is formed by laminating a plurality of negative electrodes and positive electrodes with a separator interposed therebetween.
  • the upper part of the battery case is bonded or welded to an upper lid made of a polymer resin such as PE that seals the upper opening of the battery case.
  • a rod-shaped positive electrode terminal and a negative electrode terminal for supplying electric power to the outside by using the lead battery 2 as a power source are erected on the upper lid.
  • the temperature sensor 21 is being fixed to the side part or bottom face part of a battery case.
  • the voltage measuring unit 10 has a differential amplifier circuit and the like, and measures the voltage of the liquid lead battery 2.
  • the temperature measuring unit 20 measures the temperature of the lead battery 2 in cooperation with a temperature sensor 21 such as a thermistor.
  • the current measuring unit 30 measures the current flowing through the lead battery 2 in cooperation with a current sensor 31 such as a Hall element.
  • the environmental temperature sensor 40 detects the environmental temperature of the lead battery 2.
  • the life determination device 50 determines the life (necessity of replacement) of the lead battery 2 based on the measurement results of the voltage measurement unit 10, the temperature measurement unit 20, and the current measurement unit 30.
  • the life determination device 50 includes an open circuit voltage estimation unit 101, a threshold setting unit 102, an internal resistance estimation unit 103, an internal resistance correction unit 104, a threshold storage unit 105, a switching unit 106, and a replacement necessity determination unit 107. And mainly consists of.
  • the open circuit voltage estimation unit 101 estimates an open circuit voltage (OCV) based on the measurement results of the voltage measurement unit 10 and the current measurement unit 30 and outputs the open circuit voltage to the switching unit 106.
  • OCV open circuit voltage
  • the open circuit voltage estimation unit 101 uses a square function (straight square) of a linear function equation (straight line) obtained by a least square method or the like based on a plurality of sets of measurement values VM and IM.
  • the intercept can be estimated as an open circuit voltage.
  • the threshold value setting unit 102 sets a first threshold value that serves as a reference when performing life determination based on the open circuit voltage based on the measurement result of the temperature measurement unit 20, and outputs the first threshold value to the switching unit 106. For example, the threshold setting unit 102 sets the first threshold higher as the temperature of the lead battery 2 is lower.
  • the internal resistance estimation unit 103 estimates the internal resistance based on the measurement results of the voltage measurement unit 10 and the current measurement unit 30, and outputs the estimation result to the internal resistance correction unit 104.
  • the internal resistance estimator 103 uses the slope of a linear function equation (straight line) obtained by a least square method or the like based on a plurality of sets of measured values VM and open circuit voltage estimator IM. Can be estimated as
  • the internal resistance correction unit 104 corrects the internal resistance estimated by the internal resistance estimation unit 103 using the environmental temperature of the lead battery 2 detected by the environmental temperature sensor 40, and supplies the corrected internal resistance to the switching unit 106. Output.
  • An example of a correction method in the internal resistance correction unit 104 is described in Patent Document 1.
  • the threshold value storage unit 105 stores a second threshold value that is a reference when performing life determination based on internal resistance, and outputs the second threshold value to the switching unit 106.
  • the switching unit 106 replaces either the open circuit voltage and the first set of the first threshold or the internal resistance and the second set of the second threshold according to the instruction of the control signal based on the user's operation. Output to.
  • the control signal is a signal for instructing to output the first set after the completion of push-in charging, and for outputting the second set before starting the normal charging.
  • the life determination based on the internal resistance is performed on the lead battery 2 for which the life determination based on the open circuit voltage has been performed.
  • the replacement necessity determination unit 107 compares the open circuit voltage with the first threshold value. The replacement necessity determination unit 107 determines that the lead battery 2 is deteriorated when the open circuit voltage is smaller than the first threshold, the life of the lead battery 2 is short, and the lead battery 2 needs to be replaced. When the voltage is equal to or higher than the first threshold, it is determined that it is not necessary to replace the lead battery 2. Thereby, it is possible to detect the lead battery 2 whose battery capacity is reduced due to a large amount of sulfation.
  • the replacement necessity determination unit 107 compares the internal resistance with the second threshold value.
  • the replacement necessity determination unit 107 determines that the lead battery 2 is deteriorated when the internal resistance is greater than the second threshold, the life of the lead battery 2 is short, and the lead battery 2 needs to be replaced. If the resistance is less than or equal to the second threshold value, it is determined that it is not necessary to replace the lead battery 2. Thereby, the lead battery 2 in which the battery capacity is reduced due to the increase in internal resistance can be detected.
  • the replacement necessity determination unit 107 outputs the determination result to another device (not shown).
  • a display for recommending the replacement of the lead battery 2 is performed.
  • the user When performing the life determination based on the open circuit voltage, the user first completes the push-in charging (ST201: YES), and then waits until a predetermined time elapses so that the voltage of the lead battery 2 becomes stable (ST202). : YES)
  • the life determination system 1 measures the voltage, temperature and current of the lead battery 2 (ST203). Next, the lifetime determination system 1 estimates an open circuit voltage (OCV) based on the measured voltage and current (ST204), and sets a first threshold ( ⁇ ) based on the measured temperature (ST205).
  • OCV open circuit voltage
  • the life determination system 1 compares the open circuit voltage with the first threshold value (ST206). And when the open circuit voltage is smaller than the first threshold (ST206: NO), the life determination system 1 has the lead battery 2 deteriorated, the life of the lead battery 2 is short, and the lead battery 2 needs to be replaced. Determine (ST207). On the other hand, when the open circuit voltage is equal to or higher than the first threshold value (ST206: YES), life determination system 1 determines that it is not necessary to replace lead battery 2 (ST208).
  • the life determination of the lead battery is improved by performing the life determination based on the open circuit voltage before performing the life determination based on the internal resistance for the lead battery. be able to.
  • the life determination system according to the present invention is suitable for use in determining the life of a lead battery.

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  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention vis à améliorer la précision de la détermination de la durée de vie restante d'une batterie au plomb-acide. Une unité d'estimation de tension en circuit ouvert (101) estime une tension de circuit ouvert sur la base des résultats de mesure d'une unité de mesure de tension (10) et une unité de mesure de courant (30). Une unité d'estimation de résistance interne (103) estime une résistance interne sur la base des résultats de mesure de l'unité de mesure de tension (10) et l'unité de mesure de courant (30). Une unité de détermination de la nécessité d'un remplacement (107) détermine la durée de vie restante d'une batterie au plomb-acide (2) par comparaison de la tension en circuit ouvert avec une première valeur de seuil. En outre, l'unité de détermination de la nécessité d'un remplacement (107) détermine la durée de vie restante de la batterie au plomb-acide (2) par comparaison de la résistance interne et une deuxième valeur de seuil.
PCT/JP2013/006749 2013-03-26 2013-11-18 Dispositif de détermination de durée de vie restante, système de détermination de durée de vie restante, et procédé de détermination de durée de vie restante WO2014155447A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013064579A JP2014190749A (ja) 2013-03-26 2013-03-26 寿命判定装置、寿命判定システムおよび寿命判定方法
JP2013-064579 2013-03-26

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WO2014155447A1 true WO2014155447A1 (fr) 2014-10-02

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH117985A (ja) * 1997-06-12 1999-01-12 Japan Storage Battery Co Ltd 鉛蓄電池の寿命判定装置
JP2002352865A (ja) * 2001-05-29 2002-12-06 Yuasa Corp 鉛蓄電池の寿命判定方法および寿命判定装置
JP2004215459A (ja) * 2003-01-08 2004-07-29 Hitachi Ltd 電源制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH117985A (ja) * 1997-06-12 1999-01-12 Japan Storage Battery Co Ltd 鉛蓄電池の寿命判定装置
JP2002352865A (ja) * 2001-05-29 2002-12-06 Yuasa Corp 鉛蓄電池の寿命判定方法および寿命判定装置
JP2004215459A (ja) * 2003-01-08 2004-07-29 Hitachi Ltd 電源制御装置

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