WO2014054548A1 - Dispositif d'évaluation de détérioration de batterie, dispositif de calcul de valeur de résistance, procédé d'évaluation de détérioration de batterie et programme - Google Patents

Dispositif d'évaluation de détérioration de batterie, dispositif de calcul de valeur de résistance, procédé d'évaluation de détérioration de batterie et programme Download PDF

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Publication number
WO2014054548A1
WO2014054548A1 PCT/JP2013/076400 JP2013076400W WO2014054548A1 WO 2014054548 A1 WO2014054548 A1 WO 2014054548A1 JP 2013076400 W JP2013076400 W JP 2013076400W WO 2014054548 A1 WO2014054548 A1 WO 2014054548A1
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WIPO (PCT)
Prior art keywords
time
secondary battery
value
battery
current value
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PCT/JP2013/076400
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English (en)
Japanese (ja)
Inventor
和基 尾▲崎▼
一幸 若杉
克明 森田
重水　哲郎
橋本　雅之
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三菱重工業株式会社
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Publication of WO2014054548A1 publication Critical patent/WO2014054548A1/fr

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    • 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
    • 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
    • H01M10/44—Methods for charging or discharging
    • 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
    • H02J7/0069—Charging or discharging for charge maintenance, battery initiation or rejuvenation
    • 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 battery deterioration determination device, a resistance value calculation device, a battery deterioration determination method, and a program.
  • secondary batteries such as power systems that perform electrical control using the power stored in secondary batteries and automobiles equipped with secondary batteries, receive stable power supply from secondary batteries, and In order to reduce the battery replacement cost, it is desired to accurately determine the deterioration state of the secondary battery and replace the secondary battery at an appropriate time.
  • the deterioration state of the secondary battery can be determined based on the internal resistance value of the secondary battery.
  • the internal high value calculation unit inputs the current value input to and output from the secondary battery and the voltage applied to the secondary battery.
  • the current internal resistance value of the secondary battery is calculated using the fluctuation range of the current value when the current value fluctuates more than a certain value and the fluctuation range of the voltage value at that time.
  • the battery deterioration information processing unit divides the current internal resistance value by the initial internal resistance value corresponding to the current temperature of the secondary battery, and the deterioration rate of the secondary battery at the current temperature of the secondary battery. And the deterioration rate is output to the monitor device.
  • the battery degradation detection apparatus of patent document 1 can detect the degradation condition of a battery irrespective of the load pattern of a secondary battery.
  • the calculated internal resistance value may vary depending on the power supply status of the secondary battery. For example, the timing at which the current value changes may deviate from the timing at which the voltage value changes, such as when the voltage value changes behind the current value in the secondary battery. Due to the difference in the change timing between the current value and the voltage value, a difference may occur in the internal resistance value calculated according to the measurement time of the current value or the voltage value, and the determination accuracy of the deterioration state of the secondary battery may be reduced. There is.
  • the present invention provides a battery deterioration determination device, a resistance value calculation device, a battery deterioration determination method, and a program capable of determining a deterioration state of a secondary battery with higher accuracy.
  • the magnitude of the change rate of the measured value that is at least one of the current value or the voltage value of the secondary battery is equal to or less than the predetermined change rate.
  • the magnitude of the change rate of the measurement value is equal to or less than a predetermined change rate at one time, and the magnitude of the change amount of the measurement value between the first time and the predetermined change amount is greater than or equal to the predetermined change amount.
  • a resistance value calculating unit that calculates an internal resistance value of the secondary battery; and a battery deterioration state determining unit that determines a deterioration state of the secondary battery based on the internal resistance value of the secondary battery.
  • the battery deterioration determination device is the above-described battery deterioration determination device, and the time detection unit detects a plurality of combinations of the first time and the second time.
  • the resistance value calculation unit calculates an internal resistance value of the secondary battery for each combination of the first time and the second time detected by the time detection unit, and calculates the internal resistance value obtained.
  • An average value is obtained, and the battery deterioration state determination unit determines the deterioration state of the secondary battery based on the average value of the internal resistance values obtained by the resistance value calculation unit.
  • the battery deterioration determination device is the above-described battery deterioration determination device, wherein the time detection unit has a predetermined rate of change in the current value of the secondary battery. And the time when the magnitude of the change rate of the voltage value of the secondary battery is not more than a predetermined change rate is detected as the first time, and the current value of the secondary battery And the change rate of the voltage value of the secondary battery is less than or equal to a predetermined change rate, and further, A time at which the amount of change in the current value of the secondary battery during the period is equal to or greater than a predetermined change is detected as the second time.
  • the magnitude of the change rate of the measured value that is at least one of the current value or the voltage value of the secondary battery is equal to or less than the predetermined change rate.
  • the magnitude of the change rate of the measurement value is equal to or less than a predetermined change rate, and the magnitude of the change amount of the measurement value between the first time and the first change time is a predetermined change amount.
  • the battery deterioration determination method is a battery deterioration determination method of the battery deterioration determination device, and a change in the measured value that is at least one of the current value or the voltage value of the secondary battery.
  • the first time when the magnitude of the rate is less than or equal to a predetermined change rate, and the magnitude of the change rate of the measurement value is less than or equal to a predetermined change rate and the first time A time detection step of detecting a second time when the magnitude of the change amount of the measured value is greater than or equal to a predetermined change amount; a current value and a voltage value of the secondary battery at the first time; and a time at the second time
  • a resistance value calculating step for calculating an internal resistance value of the secondary battery based on the current value and the voltage value of the secondary battery, and a deterioration of the secondary battery based on the internal resistance value of the secondary battery.
  • Battery deterioration status judgment step Comprising a flop, the.
  • the program stores a predetermined rate of change in the measured value, which is at least one of the current value or the voltage value of the secondary battery, in the computer as the battery deterioration determination device.
  • the first time when the change rate is less than or equal to the change rate of the measurement value is less than or equal to a predetermined change rate and the change amount of the measurement value between the first time and the change time
  • a time detecting step for detecting a second time having a predetermined change amount or more, a current value and a voltage value of the secondary battery at the first time, and a current value of the secondary battery at the second time
  • a resistance value calculating step for calculating an internal resistance value of the secondary battery based on the voltage value and a battery deterioration status for determining a degradation status of the secondary battery based on the internal resistance value of the secondary battery
  • a determination step Is a program for causing the line.
  • the deterioration state of the secondary battery can be determined with higher accuracy.
  • FIG. 1 is a schematic block diagram showing a functional configuration of a power supply system according to an embodiment of the present invention.
  • the power supply system 1 includes a secondary battery system 100, a battery deterioration determination device 200, and a display device 300.
  • the secondary battery system 100 includes a battery cell 110 and a BMU (Battery Management Unit) 120.
  • the battery cell 110 includes a secondary battery 111 and a CMU (Cell Management Unit) 112.
  • the battery deterioration determination device 200 includes a storage unit 210, a measurement value acquisition unit 220, a time detection unit 230, a resistance value calculation unit 240, and a battery deterioration state determination unit 250.
  • the secondary battery system 100 is connected to the power load 900 via the path W11 and supplies power to the power load 900.
  • the present embodiment can be applied to the secondary battery system 100 for various uses.
  • the secondary battery system 100 is installed in a stationary system such as a grid-connected smoothing power storage system used in combination with a power generation facility using natural energy such as wind power or sunlight, or a household power storage system. It may be provided.
  • the secondary battery system 100 may be provided in a moving body such as an automobile or a train.
  • the battery cell 110 is a unit for replacing the battery in the secondary battery system 100 (that is, replaceable for each battery cell 110).
  • the secondary battery system 100 includes one or more battery cells 110.
  • the configuration of the battery cell 110 in the secondary battery system 100 may be arbitrary.
  • a plurality of battery cells 110 may be connected in series, may be connected in parallel, or a plurality of battery cells 110 connected in parallel may be connected in series.
  • the secondary battery 111 is a chargeable / dischargeable battery.
  • the secondary battery 111 may be a battery whose internal resistance increases when it is deteriorated by repeated charge and discharge.
  • the secondary battery 111 may be a lithium ion battery or a lead battery.
  • the CMU 112 performs charge / discharge control and monitoring of the secondary battery 111 in units of cells. In particular, the CMU 112 detects the current value, voltage value, and temperature of the secondary battery 111 and notifies the battery deterioration determination device 200 via the BMU 120.
  • the battery cell 110 acquires a current value, a voltage value, and a temperature from a current sensor, a voltage sensor, and a temperature sensor provided in the secondary battery 111, respectively, as a measured value of the sensor at every predetermined sampling period. , Output to the BMU 120.
  • the BMU 120 communicates with a higher-level control device of the secondary battery system 100 to control and monitor the secondary battery system 100 as a whole. Further, the BMU 120 transmits the current value, voltage value, and temperature of the secondary battery 111 for each battery cell 110 detected by the CMU 112 to the battery deterioration determination device 200.
  • the battery deterioration determination device 200 calculates the internal resistance of the secondary battery 111 and determines whether or not the secondary battery 111 is deteriorated.
  • the battery deterioration determination device 200 may be configured by a computer, or may be realized by dedicated hardware.
  • the storage unit 210 stores various data according to the control of the measurement value acquisition unit 220.
  • the measurement value acquisition unit 220 writes / reads various data to / from the storage unit 210.
  • the measurement value acquisition unit 220 stores the current value, voltage value, and temperature of the secondary battery 111 for each battery cell 110 transmitted from the BMU 120 in the storage unit 210, and also calculates the time detection unit 230 and the resistance value. Data is read from the storage unit 210 and output in accordance with the processing of the unit 240.
  • the time detection unit 230 detects the first time and the second time for each battery cell 110 based on the current value of the secondary battery 111 detected by the CMU 112.
  • the first time is a time at which the magnitude of the rate of change of the measured value that is at least one of the current value or the voltage value of the secondary battery 111 is equal to or less than the predetermined rate of change.
  • the second time here means that the change rate of the measurement value is equal to or less than a predetermined change rate, and the change amount of the measurement value between the first time and the predetermined change rate. It is a time that is more than the amount.
  • FIG. 2 is an explanatory diagram showing an example of the first time and the second time detected by the time detection unit 230.
  • a line L11 indicates the current value of the secondary battery 111
  • a line L12 indicates the rate of change of the current value (hereinafter, the rate of change of the current value is referred to as “current rate of change”).
  • each point of the line L11 indicates the current value of the secondary battery 111 detected by the CMU 112 for each sampling period dts
  • a line L11 is obtained by connecting the points.
  • Each point of the line L12 indicates a difference obtained by subtracting the current value at the previous sampling from the current value of the secondary battery 111 for each sampling period, and the line L12 is obtained by connecting the points.
  • the resistance value calculated based on the current value and the voltage value varies, and the accuracy of determining the deterioration status of the secondary battery 111 based on the resistance value is reduced. .
  • the time detection unit 230 displays the time before the time T12 when the current value is in a steady state, and the time T14 after the time T14 when the current value is in a static state again after the current value has changed significantly from the time.
  • the time of is detected.
  • the sampling time in the static state before the current value change is referred to as “previous time”
  • the sampling time in the static state after the current value change is referred to as “post time”.
  • the time detection unit 230 detects time T12 as the previous time from the sampling time when the storage unit 210 stores the current value and voltage value of the secondary battery 111 in the following procedure. Then, the time T15 is detected as a later time.
  • the combination of the previous time and the later time corresponds to an example of a combination of the first time and the second time.
  • the time T12 corresponds to an example of the first time
  • the time T15 corresponds to an example of the second time.
  • the current value of the secondary battery 111 at the sampling time t is expressed as I (t), and the rate of change of the current value of the secondary battery 111 at the sampling time t is expressed as dI (t).
  • I (t) I (t) ⁇ I (t ⁇ dts).
  • time dts shows a sampling period.
  • dI_const is a positive constant set in advance as a determination threshold value as to whether or not the current value is in a static state.
  • indicates an absolute value.
  • the current change rate dI (T15'-dt1) before the time dt1 from the time T15 ' is calculated.
  • the time dt1 is an assumed time of current rising.
  • the time dt1 can be set in advance as a constant.
  • the following processing may be performed for a plurality of times dt1, for example, the time detection unit 230 sets the time dt1 in the range from 1 sampling before 20 times before the time T15 '.
  • dI_rise is a positive constant set in advance as a determination threshold value for determining whether or not the current is in a transient state. 5.
  • Expression (2) it is determined whether or not the current value is in a static state at all sampling times from time T15′-dt1 one time before time T15′-dt1-dts to time dt0. judge.
  • the time dt1 is a positive constant set in advance as a settling time before the current rises.
  • Step 4 in the above procedure is a step for detecting the sampling time immediately before the current rise as the previous time, and is not an essential step.
  • the number of samplings for determining whether or not the state is a static state may be one or more before and after the current rise. Therefore, in step 5, it may be determined whether the current change rate is equal to or less than dI_const for only one sampling time. Further, in step 2, it may be determined whether the current change rate is equal to or less than dI_const for a plurality of sampling times.
  • the resistance value calculation unit 240 is based on the current value and voltage value of the secondary battery 111 at the first time and the current value and voltage value of the secondary battery 111 at the second time.
  • An internal resistance value of 111 is calculated.
  • the resistance value calculation unit 240 performs a secondary operation based on the difference between the current value and voltage value at time T12, which is the previous time, and the current value and voltage value at time T15, which is the subsequent time.
  • the internal resistance value of the battery 111 is calculated, and the temperature of the internal resistance value is corrected based on the temperature of the secondary battery 111.
  • the resistance value calculation unit 240 does not perform temperature correction. It may be.
  • Battery deterioration state determination unit 250 determines the deterioration state of secondary battery 111 based on the internal resistance value of secondary battery 111 after temperature correction acquired by resistance value calculation unit 240. For example, the battery deterioration state determination unit 250 compares the internal resistance value of the secondary battery 111 after temperature correction with a predetermined threshold value, and the battery cell 110 needs to be replaced when the internal resistance value is equal to or greater than the threshold value (secondary battery It is determined that the degree of deterioration of the battery 111 is large). On the other hand, when the internal resistance value is less than the threshold value, the battery deterioration state determination unit 250 determines that the replacement of the battery cell 110 is unnecessary (the degree of deterioration of the secondary battery 111 is small).
  • the display device 300 has a display screen such as a liquid crystal panel or an organic EL (Organic Electroluminescence) panel, for example, and displays the determination result of the battery deterioration state determination unit 250.
  • the display device 300 only needs to be able to notify the determination result of the battery deterioration state determination unit 250.
  • the display device 300 may include a lamp such as a light-emitting diode, and turn on the lamp to display that the secondary battery 111 needs to be replaced.
  • the display device 300 outputs a sound such as a voice message or a buzzer sound in addition to or instead of the visual display to indicate that the secondary battery 111 needs to be replaced. You may do it.
  • FIG. 3 is a flowchart illustrating a processing procedure in which the battery deterioration determination device 200 determines whether or not the battery cell 110 needs to be replaced.
  • the battery deterioration determination device 200 is illustrated for each of the battery cells 110 periodically, for example, every day or every month, or in response to a request from a user of the battery deterioration determination device 200 (for example, an administrator of the power supply system 1). Process 3 is performed. Note that the battery deterioration determination device 200 may perform the processing of FIG. 3 in real time for each sampling period of the current value, voltage value, and temperature of the secondary battery 111.
  • the time detection unit 230 initially sets a candidate for a later time (step S101). For example, the time detection unit 230 sets any of the sampling times when the storage unit 210 stores the current value of the secondary battery 111 or the like as a later time candidate. In addition, when the battery deterioration determination apparatus 200 performs the process of FIG. 3 for each current value, voltage value, and temperature sampling period of the secondary battery 111, the time detection unit 230 sets the latest sampling time as a candidate for a later time. Set.
  • the time detection unit 230 determines whether or not the storage unit 210 stores data at the sampling time that is a determination target of the static state before rising (step S102). For example, in the example shown in FIG. 2, the time detection unit 230 determines whether the storage unit 210 stores data at each sampling time from time T11 to time T12.
  • Step S111 the time detection unit 230 calculates a current change rate in a later time candidate (step S111).
  • Step 1 of the process described above with reference to FIG. 2 corresponds to an example of steps S101 and S111 of FIG.
  • the time detection unit 230 determines whether or not the current value of the secondary battery 111 is in a static state in a later time candidate based on the current change rate calculated in step S111 (step S112).
  • Step 2 of the above process corresponds to an example of step S112 in FIG.
  • the time detection part 230 calculates the electric current change rate in the assumption time of an electric current value rise start (step S121).
  • Step 3 of the above process corresponds to an example of step S121 in FIG.
  • the time detection unit 230 determines whether or not the current actually rises at the estimated current value rise start time (step S122).
  • Step 4 of the above process corresponds to an example of step S122 in FIG.
  • the time detection unit 230 calculates a current change rate for each sampling time that is a determination target of the static state before the rising (step S131).
  • step S132 the time detection unit 230 sets the current value of the secondary battery 111 to the static state at all the sampling times that are targets for determination of the static state before rising. It is determined whether or not there is (step S132). Step 5 of the above process corresponds to an example of steps S131 to S132 in FIG.
  • step S132 YES
  • the time detection unit 230 subtracts the current value in the candidate at the later time from the current value in the candidate at the previous time as the current change amount due to the rising of the current. The amount of change is calculated (step S141).
  • step S142 determines whether or not the change amount calculated in step S141 is a significant current value change amount for accurately determining the current value of the secondary battery 111 (step S142).
  • Step 6 of the above process corresponds to an example of step S142 in FIG.
  • step S142 YES
  • the time detection unit 230 sets the previous time candidate as the previous time, sets the subsequent time candidate as the subsequent time, The time and the later time are output to the resistance value calculation unit 240 (step S151).
  • step S151 Step 7 of the above process corresponds to an example of step S151 in FIG.
  • the resistance value calculation unit 240 calculates the internal resistance value of the secondary battery 111 based on the previous time and the later time set by the time detection unit 230 (step S152). And the resistance value calculation part 240 correct
  • step S102 when it is determined in step S102 that the corresponding data is not stored in the storage unit 210 (step S102: NO), the time detection unit 230 changes the later time candidate (step S161). For example, the time detection unit 230 sets a sampling time that has not yet been set as a later time candidate among the sampling times at which the storage unit 210 stores data as a later time candidate. After step S161, the process returns to step S102.
  • the battery deterioration determination device 200 When there is no sampling time that has not yet been set as a later time candidate, or when the battery deterioration determination device 200 performs the process of FIG. 3 for each sampling period of the current value, voltage value, or temperature of the secondary battery 111. Then, the battery deterioration determination device 200 ends the process of FIG. In this case, the battery deterioration determination device 200 fails to determine the deterioration state of the secondary battery 111, and waits for the storage unit 210 to store new data, for example, and performs the process of FIG. 3 again.
  • step S112 determines with the electric current value of the secondary battery 111 not being in a static state in step S112 (step S112: NO). It progresses to step S161. If it is determined in step S122 that the current has not risen at the estimated start time of the current value rise (step S122: NO), the process also proceeds to step S161. Moreover, also when it determines with the electric current value of the secondary battery 111 not being in a static state in step S132 (step S132: NO), it progresses to step S161. If it is determined in step S142 that the amount of change calculated in step S141 is not a significant current value change amount (step S142: NO), the process also proceeds to step S161.
  • the time detection unit 230 determines that the current value of the secondary battery 111 is in a static state, the current value of the secondary battery 111 is in a static state, and the first time.
  • the second time at which the magnitude of the change amount of the current value during the period is equal to or greater than the predetermined change amount is detected.
  • the resistance value calculation unit 240 determines whether the internal value of the secondary battery 111 is based on the current value and the voltage value at two times when the current value is in a static state and the current value is significantly different.
  • the value can be calculated with higher accuracy, and the battery deterioration state determination unit 250 can determine the deterioration state of the secondary battery 111 with higher accuracy using the internal resistance value.
  • the time detection unit 230 detects the static state after the current rise after detecting the static state after the current rise, but conversely, the static state before the current rise is detected. You may make it detect the static state after electric current rise after detecting. In the above description, the time detection unit 230 detects the sampling time in the static state before and after the current rise. However, the time detection unit 230 detects the sampling time in the static state before and after the current fall. You may do it. When the entire secondary battery system 100 is replaced when the secondary battery 111 is deteriorated, the battery deterioration determination device 200 determines the deterioration state by obtaining the internal resistance value of the secondary battery 111 for the entire secondary battery system 100. It may be.
  • the battery deterioration determination device 200 calculates the internal resistance value of the secondary battery 111 a plurality of times to obtain an average, and determines the deterioration state of the secondary battery 111 based on the obtained average value of the internal resistance values. You may do it.
  • the time detection unit 230 detects a plurality of combinations of the first time and the second time.
  • the resistance value calculation part 240 calculates the internal resistance value of the secondary battery 111 for every combination of the 1st time detected by the time detection part 230, and the 2nd time, and average value of the obtained internal resistance value Ask for.
  • the battery deterioration state determination unit 250 determines the deterioration state of the secondary battery 111 based on the average value of the internal resistance values obtained by the resistance value calculation unit 240. Thereby, the battery deterioration determination device 200 determines the internal resistance value with higher accuracy by reducing the influence of the temporary measurement error of the sensor and external noise, and determines the deterioration state of the secondary battery 111 with higher accuracy. be able to.
  • the time detection unit 230 detects the sampling time when the current value of the secondary battery 111 is stabilized has been described above. However, the time detection unit 230 stabilizes the current value of the secondary battery 111. In addition to or instead of the state, the sampling time in the static state of the voltage value of the secondary battery 111 may be detected.
  • FIG. 4 is an explanatory diagram showing an example of a change in the current value and a change in the voltage value of the secondary battery 111.
  • a line L21 indicates a change in the current value of the secondary battery 111
  • a line L22 indicates a change in the voltage value of the secondary battery 111.
  • the current value of the secondary battery 111 is in a static state during the period from time T21 to T22.
  • the voltage value of the secondary battery 111 continues to change after time T21 and is not in a static state.
  • the timing at which the current value changes may not match the timing at which the voltage value changes.
  • the time detection unit 230 detects the sampling time in the state where the voltage value of the secondary battery 111 is stabilized in addition to or instead of the state where the current value of the secondary battery 111 is stabilized. You may make it do.
  • the magnitude of the change rate of the current value of the secondary battery 111 is equal to or less than a predetermined change rate, and the magnitude of the change rate of the voltage value of the secondary battery 111 is a predetermined change.
  • a time that is lower than the rate is detected as one time.
  • the time detection unit 230 has a change rate of the current value of the secondary battery 111 equal to or less than a predetermined change rate, and a change rate of the voltage value of the secondary battery 111 has a predetermined change.
  • the time when the amount of change in the current value of the secondary battery 111 between the first time and the first time is equal to or greater than a predetermined change is detected as the second time.
  • the resistance value calculation unit 240 determines the secondary value based on the current value and the voltage value at two times when the voltage value is in a static state in addition to the current value and there is a significant difference in the current value.
  • the internal resistance value of the battery 111 can be calculated with higher accuracy, and the battery deterioration state determination unit 250 can determine the deterioration state of the secondary battery 111 with higher accuracy using the internal resistance value.
  • the time detection part 230 switch itself whether it detects the steady state of a voltage value. For example, when the time detection unit 230 determines whether both the current value and the voltage value of the secondary battery 111 are in a static state, the first time and the second time are detected for a predetermined time or more. If it fails, it may be switched to the determination of whether or not the current value is in a static state. That is, the time detection unit 230 may not determine whether the voltage value is in a static state. Thereby, the time detection unit 230 can detect the first time and the second time. Note that, among the units of the battery deterioration determination device 200, the storage unit 210, the measurement value acquisition unit 220, the time detection unit 230, and the resistance value calculation unit 240 may constitute a resistance value calculation device.
  • a computer can be used as the battery deterioration determination device 200. Therefore, a program for realizing all or a part of the functions of the battery deterioration determination apparatus 200 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed. You may process each part by.
  • the “computer system” includes an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line.
  • a volatile memory in a computer system serving as a server or a client in that case and a program that holds a program for a certain period of time are also included.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • the present invention provides the first time when the magnitude of the change rate of the measured value that is at least one of the current value or the voltage value of the secondary battery is equal to or less than the predetermined change rate, and the magnitude of the change rate of the measured value.
  • a time detection unit for detecting a second time when the second change time is less than or equal to a predetermined change rate and the magnitude of the change amount of the measured value between the first time and the predetermined change amount.
  • the resistance value for calculating the internal resistance value of the secondary battery based on the current value and voltage value of the secondary battery at the first time and the current value and voltage value of the secondary battery at the second time
  • the present invention relates to a battery deterioration determination device including a calculation unit and a battery deterioration state determination unit that determines a deterioration state of the secondary battery based on an internal resistance value of the secondary battery. According to the present invention, it is possible to determine the deterioration state of the secondary battery with higher accuracy.

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

Abstract

L'invention concerne un dispositif d'évaluation de détérioration de batterie qui comprend : une unité de détection de moment qui détecte un premier moment auquel le taux de variation d'une valeur mesurée, à savoir la valeur du courant et/ou la valeur de tension d'une batterie secondaire, atteint ou tombe au-dessous d'un taux de variation prévu, et un second moment auquel le taux de variation de la valeur mesurée atteint ou tombe au-dessous du taux de variation prévu, et auquel la quantité de variation par rapport à la valeur mesurée, depuis le premier moment, a atteint ou dépassé une quantité de variation prévue ; une unité de calcul de valeur de résistance qui calcule la valeur de résistance interne de la batterie secondaire sur la base de la valeur du courant et de la valeur de tension de la batterie secondaire au premier moment, et de la valeur du courant et de la valeur de tension de la batterie secondaire au second moment ; et une unité d'évaluation d'état de détérioration de batterie qui évalue l'état de détérioration de la batterie secondaire sur la base de la valeur de résistance interne de cette dernière.
PCT/JP2013/076400 2012-10-02 2013-09-27 Dispositif d'évaluation de détérioration de batterie, dispositif de calcul de valeur de résistance, procédé d'évaluation de détérioration de batterie et programme WO2014054548A1 (fr)

Applications Claiming Priority (2)

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JP2012220242A JP5960017B2 (ja) 2012-10-02 2012-10-02 電池劣化判定装置、抵抗値算出装置、電池劣化判定方法およびプログラム
JP2012-220242 2012-10-02

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Cited By (3)

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CN104931888A (zh) * 2014-03-19 2015-09-23 丰田自动车株式会社 用于电池的劣化判定装置
CN110217108A (zh) * 2018-03-02 2019-09-10 丰田自动车株式会社 电池的诊断装置及诊断方法
US10634729B2 (en) 2015-03-27 2020-04-28 Gs Yuasa International Ltd. Deterioration detector for non-aqueous electrolyte power storage element, power storage device, deterioration detection system for non-aqueous electrolyte power storage element, and deterioration detection method for non-aqueous electrolyte power storage element

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JP6504544B2 (ja) * 2015-10-26 2019-04-24 パナソニックＩｐマネジメント株式会社 表示装置の制御方法、及び、表示システム
DE102017208770B4 (de) * 2017-05-23 2019-03-28 Audi Ag Verfahren zur Prüfung eines Batteriezustands und Prüfvorrichtung zur Prüfung eines Batteriezustands
KR102261481B1 (ko) 2017-10-30 2021-06-07 (주)엘지에너지솔루션 배터리 퇴화 진단 장치 및 방법
JP7003751B2 (ja) * 2018-03-12 2022-01-21 トヨタ自動車株式会社 電池診断装置及び電池診断方法

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JPH10197613A (ja) * 1997-01-14 1998-07-31 Fujitsu Denso Ltd 内部抵抗測定方法
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JPH10197613A (ja) * 1997-01-14 1998-07-31 Fujitsu Denso Ltd 内部抵抗測定方法
JP2010093875A (ja) * 2008-10-03 2010-04-22 Hitachi Ltd 電源制御装置、車両走行制御システム及び蓄電池劣化状態検知方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104931888A (zh) * 2014-03-19 2015-09-23 丰田自动车株式会社 用于电池的劣化判定装置
CN104931888B (zh) * 2014-03-19 2017-08-29 丰田自动车株式会社 用于电池的劣化判定装置
US10634729B2 (en) 2015-03-27 2020-04-28 Gs Yuasa International Ltd. Deterioration detector for non-aqueous electrolyte power storage element, power storage device, deterioration detection system for non-aqueous electrolyte power storage element, and deterioration detection method for non-aqueous electrolyte power storage element
CN110217108A (zh) * 2018-03-02 2019-09-10 丰田自动车株式会社 电池的诊断装置及诊断方法

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