WO2018074469A1 - Dispositif et procédé permettant de déterminer la détérioration d'une batterie secondaire - Google Patents

Dispositif et procédé permettant de déterminer la détérioration d'une batterie secondaire Download PDF

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Publication number
WO2018074469A1
WO2018074469A1 PCT/JP2017/037525 JP2017037525W WO2018074469A1 WO 2018074469 A1 WO2018074469 A1 WO 2018074469A1 JP 2017037525 W JP2017037525 W JP 2017037525W WO 2018074469 A1 WO2018074469 A1 WO 2018074469A1
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WIPO (PCT)
Prior art keywords
internal resistance
secondary battery
voltage
measured value
deterioration
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PCT/JP2017/037525
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English (en)
Japanese (ja)
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神戸祥吾
尼野慎也
堺香代
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Ntn株式会社
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Publication of WO2018074469A1 publication Critical patent/WO2018074469A1/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]
    • 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
    • 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
    • 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 an apparatus and a method for determining the degree of deterioration of a secondary battery such as a lead storage battery.
  • Patent Document 1 discloses a method of performing deterioration diagnosis at the completion of the charging period of the secondary battery, but this is also a method that takes time because it is performed after the charging time.
  • the present invention is based on the measured value of the internal resistance without being affected by the charging state of the secondary battery in the measurement of the internal resistance for determining the degree of deterioration of the secondary battery. It is an object of the present invention to provide a secondary battery deterioration determination apparatus and method capable of performing determination.
  • the present invention provides the following configuration.
  • symbol in a parenthesis is a code
  • the aspect of the secondary battery deterioration determination device includes a storage voltage measuring means for measuring a storage voltage of the secondary battery, An internal resistance measuring means for measuring the internal resistance of the secondary battery; A correction internal resistance is obtained by performing processing for converting the measured value of the internal resistance when the measured value of the stored voltage is obtained into an internal resistance at a reference stored voltage for determining deterioration of the secondary battery or an approximate value thereof. Deriving internal resistance correction means; Display means for displaying a deterioration determination result of the secondary battery based on the derived corrected internal resistance.
  • the internal resistance correction unit has a table preset in association with the charging condition corresponding to the measured value of the stored voltage and the correction coefficient to be applied, and is based on the measured value of the stored voltage It is preferable to convert the measured value of the internal resistance using the correction coefficient selected with reference to the table.
  • the internal resistance correction unit uses a predetermined linear function that indicates a correlation between the measured value of the storage voltage and the measured value of the internal resistance as a reference. It is preferable to convert the internal resistance at the stored voltage.
  • the internal resistance measuring unit acquires an AC voltage component generated between terminals when a current having a single polarity is applied between the terminals of the secondary battery, and is proportional to the magnitude of the AC voltage component. It is preferable to obtain the value to be measured as the measured value of the internal resistance.
  • the aspect of the secondary battery deterioration determination method includes a storage voltage measurement step of measuring a storage voltage of the secondary battery; An internal resistance measurement step for measuring the internal resistance of the secondary battery; A correction internal resistance is obtained by performing processing for converting the measured value of the internal resistance when the measured value of the stored voltage is obtained into an internal resistance at a reference stored voltage for determining deterioration of the secondary battery or an approximate value thereof. An internal resistance correction step to be derived; And a display step for displaying a result of determining the deterioration of the secondary battery according to the derived corrected internal resistance.
  • the storage voltage indicating the charging state of the secondary battery is measured, and the measured value of the internal resistance is determined according to the measured value of the storage voltage. Correction is performed, and deterioration determination is performed using the corrected internal resistance. As a result, it is possible to determine the degree of deterioration based on the internal resistance of the secondary battery by offsetting the influence of the fluctuation of the internal resistance due to the charging state of the secondary battery.
  • FIG. 1 is a diagram schematically and schematically showing a configuration example of a secondary battery deterioration determination device according to the present invention.
  • FIG. 2 is an example of an operation flow of the degradation determination apparatus shown in FIG.
  • FIG. 3 is a schematic diagram for explaining an example of the correction calculation process in the internal resistance correction unit of the control unit.
  • FIG. 4 is a schematic diagram for explaining another example of the correction calculation process in the internal resistance correction unit of the control unit.
  • FIG. 5 is a graph for explaining still another example of the correction calculation process in the internal resistance correction unit of the control unit.
  • FIG. 6 is a schematic configuration diagram illustrating a configuration example of the pulsating flow generation unit.
  • FIG. 7 is a schematic configuration diagram illustrating a configuration example of the internal resistance measurement unit.
  • FIG. 1 is a diagram schematically and schematically showing a configuration example of a secondary battery deterioration determination device (hereinafter referred to as “battery deterioration determination device”) according to the present invention.
  • Secondary batteries to which the present invention is applied are lead acid batteries, lithium ion batteries, nickel-cadmium rechargeable batteries, nickel metal hydride rechargeable batteries, and the like.
  • the battery deterioration determination apparatus 10 includes a storage voltage measurement unit 1, a pulsating flow generation unit 2, an internal resistance measurement unit 3, a display unit 4, a switching unit 5, and a control unit 6 as main components. Furthermore, it has terminals T1 and T2 for inputting from an external AC power source ac and terminals T3 and T4 connected to both the positive and negative terminals of the secondary battery B. You may comprise so that the power supply for driving each component of the battery degradation determination apparatus 10 may be obtained from external AC power supply ac, the secondary battery B, another battery which is not shown in figure, etc. However, when power is obtained from the secondary battery B, it is configured so as not to affect the measurement of the secondary battery B.
  • the overall operation of the battery deterioration determination device 10 is controlled by the control unit 6.
  • the control unit 6 includes an arithmetic device such as a microcomputer or a DSP, and includes a storage unit for storing necessary data.
  • the storage voltage measuring unit 1 is provided for measuring the storage voltage V x of the secondary battery B.
  • the storage voltage V x can be determined charge state of the secondary battery B. This measurement is performed by setting the secondary battery B to an open state (a state in which neither charging nor discharging is performed), connecting only the stored voltage measuring unit 1 between the terminals T3 and T4 and measuring the voltage between the terminals.
  • the storage voltage measuring unit 1 can be configured as a general DC voltage measuring device.
  • the pulsating flow generation unit 2 and the internal resistance measurement unit 3 are provided for measuring the internal resistance of the secondary battery B.
  • Pulsating flow generation section 2 is input to an external AC power supply ac, which are full-wave rectified to produce a pulsating flow V p.
  • the AC power supply ac is, for example, a 100V or 200V 50 Hz or 60 Hz single-phase AC commercial power supply. A configuration example of the pulsating flow generation unit 2 will be described with reference to FIG.
  • the battery deterioration determination device 10 of the present invention can also be used as a charger.
  • the pulsating flow generation unit 2 is used as a charger, it is performed as an operation mode different from the battery deterioration determination mode.
  • the start and stop of the pulsating flow generation unit 2 can be performed by controlling the switch S3 by the control signal c2 from the pulsating flow start / stop control unit 6B of the control unit 6.
  • the waveform of the output current of the pulsating flow generation unit 2 is preferably a single-phase AC full-wave rectification waveform, but may be a pulse current or a rectangular wave current instead. If the current is unipolar (having only positive or negative amplitude) and the amplitude varies periodically, it can be used for both internal resistance measurement and secondary battery B charging. it can.
  • the internal resistance measurement unit 3 is configured such that the pulsating flow V p generated by the pulsating flow generation unit 2 is applied between the terminals of the secondary battery B, and the AC component of the voltage across the terminals of the secondary battery B (hereinafter “AC voltage component ”). It is known that the magnitude of this AC voltage component is proportional to the internal resistance of the secondary battery B.
  • This AC voltage component is, for example, about several mV, but the internal resistance measurement unit 3 performs amplification and rectification, for example, several hundred times to convert it into a DC voltage.
  • a configuration example of the internal resistance measurement unit 3 will be described with reference to FIG.
  • the DC voltage output from the internal resistance measuring unit 3 is proportional to the internal resistance of the secondary battery B. Therefore, the output value of the internal resistance measurement unit 3 is referred to as “measurement value r x of internal resistance”.
  • the secondary battery B Since the measurement by the internal resistance measurement unit 3 is performed almost simultaneously and instantaneously with the measurement of the storage voltage V x , the secondary battery B is charged by the application of the pulsating flow V p during the measurement of the internal resistance, and the storage voltage V x. The effect of changing is negligible.
  • the internal resistance of the secondary battery B can be used as a criterion for determining the degree of deterioration of the secondary battery B.
  • the internal resistance also varies depending on the current charging state of the secondary battery B.
  • the measurement value r x of the internal resistance is corrected in accordance with the charging state of the secondary battery B so that the degree of deterioration can be determined without depending on the charging state. This correction is performed by the control unit 6.
  • the control unit 6 acquires the measured value V x of the stored voltage measured by the stored voltage measuring unit 1 and the measured value r x of the internal resistance measured by the internal resistance measuring unit 3.
  • the control unit 6 includes an internal resistance correction unit 6A that performs arithmetic processing for correcting the measurement value r x of the internal resistance. In this calculation process, the measured value r x of the internal resistance is converted into a corrected internal resistance that does not depend on the charged condition, based on the measured value V x of the stored voltage indicating the current charged condition.
  • one storage voltage is preset as the reference storage voltage V ref , and the internal resistance measurement value r x obtained at the predetermined storage voltage measurement value V x is used as the internal resistance at the reference storage voltage V ref or an approximation thereof. Convert to value.
  • the reference storage voltage V ref is assumed to be a fully charged storage voltage as an example.
  • the value of the internal resistance after the correction is referred to as a "correction internal resistance r a.”
  • a specific example of the correction calculation process in the internal resistance correction unit 6A will be described with reference to FIGS.
  • Correcting the internal resistance r a derived internally resistance correction section 6A can be used as a criterion of degree of deterioration of the secondary battery B.
  • Control unit 6 sends a predetermined deterioration determination signal c1 based on the corrected internal resistance r a display unit 4.
  • the display unit 4 displays an index indicating the degree of deterioration based on the deterioration determination signal c1.
  • the deterioration determination signal c1 is generated as a voltage having a magnitude proportional to the corrected internal resistance.
  • the display unit 4 performs display by driving a level indicator or the like, for example, according to the voltage received from the control unit 6.
  • control unit 6 determines a deterioration stage in comparison with a plurality of preset deterioration stages based on the value of the corrected internal resistance ra, and a deterioration determination signal c1 corresponding to the determined deterioration stage. May be transmitted to the display unit 4.
  • the display unit 4 can have various configurations as a display device such as an analog display, a digital display, or a combination thereof.
  • the switching unit 5 includes two switches S1 and S2, and is switched by the switching control signal c3 sent from the switching control unit 6C of the control unit 6 to switch between the following two states.
  • the apparatus configuration shown in FIG. 1 is an example.
  • one or more of the components of the storage voltage measurement unit 1, the pulsating flow generation unit 2, the internal resistance measurement unit 3, the display unit 4, the switching unit 5, and the control unit 6 are configured as separate devices. It is also possible to implement as a system as a whole.
  • the storage voltage measuring unit 1 and the display unit 4 can use existing devices.
  • FIG. 2 is an example of an operation flow of the battery deterioration determination apparatus shown in FIG.
  • an operation flow may be automatically executed by turning on a predetermined measurement start switch.
  • the control unit 6 is preinstalled with a program for executing such an operation flow.
  • step S11 connect the battery terminals T3, T4 in storage voltage measuring unit 1 by the switching unit 5, the power storage voltage measuring unit 1 obtains a measured value V x of the power storage voltage.
  • step S ⁇ b > 12 the control unit 6 acquires a measured value V x of the stored voltage measured by the stored voltage measuring unit 1.
  • Control unit 6 stores the temporarily stored unit of measurement values V x of the power storage voltage.
  • step S13 the switching unit 5 connects the battery terminals T3 and T4 to the pulsating flow generation unit 2 and the internal resistance measurement unit 3. Thereafter, the pulsating flow generation unit 2 is activated and a pulsating flow is applied to the secondary battery B.
  • step S ⁇ b > 14 the internal resistance measuring unit 3 measures the internal resistance from the AC voltage component between the terminals, and obtains a measured value r x of the internal resistance.
  • step S ⁇ b > 15 the control unit 6 acquires the measurement value r x of the internal resistance measured by the internal resistance measurement unit 3.
  • the control unit 6 temporarily stores the measured value r x of the internal resistance in the storage unit.
  • step S16 the control unit 6, based on the measurement values V x of the power storage voltage, and corrects the measured value r x of the internal resistance, obtain a corrected internal resistance r a.
  • step S17 based on the obtained correction internal resistance r a, is displayed on the display unit 4 the index indicating the degree of deterioration of the secondary battery B.
  • the operation flow from the start of measurement in step S11 in FIG. 2 to the result display in step S17 is executed almost instantaneously.
  • the operation flow shown in FIG. 2 is a case where the apparatus having the configuration shown in FIG. 1 is used.
  • the basic operation flow should be understood as a flow of a battery deterioration determination method. It is not implemented only in the apparatus having the configuration shown in FIG.
  • FIG. 3 is a schematic diagram for explaining an example of the correction calculation process in the internal resistance correction unit 6A of the control unit 6.
  • This example is a lead storage battery in which 6 single cells 2V are connected in series.
  • the internal resistance correction unit 6A previously creates and stores a table T1 in which the charging condition and the correction coefficient k are associated with each other.
  • a table T1 can be created by conducting a preliminary test for measuring in advance the correlation between the charging condition (storage voltage) and the internal resistance for the target type secondary battery.
  • the charging condition is divided into nine stages, and a predetermined correction coefficient k is set for each division.
  • Each section is indicated by [%], but in reality, a predetermined range of the measured value V x of the stored voltage is set for each section.
  • the measured value V x of the storage voltage is in a range of 12.40V or more.
  • the charging level is 55%, the measured value of the storage voltage V x is 11.90V or more and less than 12.05V. And so on.
  • the category of 100% charge level corresponds to a fully charged state, and the category of 0% charge level corresponds to a nearly discharged state.
  • the reference storage voltage V ref is 12.46V.
  • the reference storage voltage V ref means the storage voltage used as a reference for determining deterioration of the secondary battery.
  • translation correction internal resistance r a is consistent with the internal resistance of the reference storage voltage V ref.
  • the value of the correction coefficient k is set to be larger as the charging state is lower. This is because the measured value r x of the internal resistance increases as the charging state decreases.
  • the correction coefficient k is “ Since it is 1.26 ", the corrected internal resistance ra is" 6.82 m ⁇ ".
  • corrected internal resistance r a If corrected internal resistance r a is obtained, it is possible to determine the degree of degradation of the secondary battery based on this value.
  • the value of the correction internal resistance r a can, it can be said that it reflects the degree of degradation. Therefore, to generate a voltage proportional to the corrected internal resistance r a, it may be transmitted to the display unit as the deterioration determination signal.
  • a plurality of stages degree of degradation of the secondary battery (e.g. three stages, four stages, etc.) divided into a table for each stage of the degree of degradation is associated with the corrected internal resistance r a (not shown) in advance Create and remember. If corrected internal resistance r a is obtained, by referring to this table to determine the stage of the degree of degradation, and generates a voltage based on the determination result may be transmitted to the display unit as the deterioration determination signal.
  • FIG. 4 is a schematic diagram for explaining another example of the correction calculation process in the internal resistance correction unit 6A of the control unit 6. This example is an example of the same lead storage battery as FIG. 3, and is also a modification of FIG.
  • the correction coefficient k is set by grouping 9 categories of charging conditions into 3 categories. In effect, the state of charging is set in three stages.
  • the reference storage voltage V ref is 12.46 V as in the example of FIG. 3, but 1.00 is not adopted as the correction coefficient k. Therefore, even with the same "12.46V" and the measured value V x is the reference stored voltage V ref of the energy storage voltage, since the correction coefficient k is "1.04", the correction internal resistance r a is "6.30Emuomega Then, a phenomenon occurs in which the approximate value deviates from the internal resistance at the reference storage voltage Vref . Further, since the division of the charging condition is in three stages, the variation of the correction internal resistance r a, compared to the example of FIG. 3 is increased. However, as a whole, there is variation in a predetermined range above and below centering on the internal resistance at the reference storage voltage V ref . Therefore, there is no trouble in performing the deterioration determination based on the corrected internal resistance r a.
  • FIG. 5 is a graph for explaining still another example of the correction calculation process in the internal resistance correction unit 6A of the control unit 6.
  • the internal resistance correction unit 6A preliminarily determines and stores a linear function indicating the correlation between the charging condition (storage voltage) and the internal resistance as shown in FIG.
  • a linear function can be determined by conducting a preliminary test for measuring the correlation between the charging condition (storage voltage) and the internal resistance in advance for the target type secondary battery.
  • FIG. 5 (a) to indicate the gradient a of the linear function for easy understanding positive, the magnitude of the measurement values V x of the stored voltage of the x-axis (the right low voltage) opposite direction indicated by .
  • the determination of the linear function indicating the correlation between the measured value V x of the storage voltage and the measured value r x of the internal resistance means that the slope a and the intercept are determined.
  • the measured value r x of the internal resistance is converted into a corrected internal resistance ra that is an internal resistance at the reference storage voltage V ref .
  • This is the graph of a linear function of FIG. 5 (a), it means that the internal resistance r x of the point Q is the measurement point, the procedure moves to the internal resistance r a of the point P which is a reference storage voltage V ref .
  • the x-axis indicates the degree of deterioration of the secondary battery
  • the y-axis indicates the internal resistance.
  • the degree of deterioration of the secondary battery and the internal resistance (corrected internal resistance r a ) at the reference storage voltage V ref have a linear function correlation indicated by a solid line. Based on this correlation, the correction the internal resistance r a it is possible to determine the degree of degradation of the secondary battery correctly.
  • the deterioration determination result is displayed on the display unit 4 in the same manner as the method shown in FIGS.
  • the graph of the linear function shown by a dotted line in FIG. 5B is a hypothetical determination of the degree of deterioration when the measured value r x of the internal resistance at the measured value V x of the storage voltage is used without being converted. It is. In this case, it is erroneously determined that the deterioration is progressing more than the actual deterioration degree.
  • the reference storage voltage V ref for performing the deterioration determination is set to the fully charged storage voltage, but the storage voltage other than full charge may be used as the reference storage voltage V ref .
  • the correction example in which the measured value r x of the internal resistance is divided by the correction coefficient k is shown, but this is the same processing as the multiplication by the correction coefficient 1 / k.
  • the method is not limited to division.
  • control unit including a microcomputer DSP, or were subjected to correction of the measured values r x of the internal resistance mainly by digital processing, the same processing can also be performed by analog circuits in all or part It is.
  • FIG. 6A schematically shows a configuration example of the pulsating flow generation unit 2 in the apparatus illustrated in FIG.
  • the alternating current of the sine wave waveform output from the alternating current power supply ac is input to the terminals T1 and T2 of the present apparatus.
  • the input alternating current is input to the alternating current input terminal of the rectifying unit 2A.
  • the rectification unit 2A is, for example, a bridge rectification circuit, but is not limited thereto.
  • a full-wave rectifier circuit is preferable, but a half-wave rectifier circuit may be used.
  • a rectified voltage Vrec is output between the positive output terminal and the negative output terminal of the rectifying unit 2A.
  • the waveform of the rectified voltage Vrec is a full-wave rectified waveform.
  • the frequency of the rectified voltage Vrec is twice the frequency of the AC power supply ac.
  • the rectified voltage Vrec output to the positive output terminal and the negative output terminal of the rectification unit 2A is input to the power factor improvement unit 2B in the next stage.
  • the power factor improvement unit 2B is configured as an insulating flyback converter.
  • the power factor improving unit 2B is not limited to this, and may be an insulating forward converter or a non-insulating step-up chopper or step-down chopper. Any configuration can be adopted as long as it is a switching converter having a power factor improving function that outputs a current in the same phase with the same sine wave as the input voltage. As a common configuration, all have a switching element Q for PWM control.
  • FIG. 6B shows an example of the waveform of the pulsating flow V p output from the pulsating flow generation unit 2.
  • FIG. 7 schematically illustrates a configuration example of the internal resistance measurement unit 3 in the apparatus illustrated in FIG.
  • Internal resistance measurement unit 3 is input to the terminal voltage of the secondary battery B being applied a pulsating flow V p generated by the pulse current generator 2 shown in FIG.
  • This inter-terminal voltage includes a direct current component and an alternating current component.
  • the AC component extraction unit 3A that is an input stage of the internal resistance measurement unit 3
  • only the AC voltage component v rx is extracted.
  • the DC component is cut by the capacitor C31.
  • the AC voltage component v rx may be extracted via a transformer.
  • the AC voltage component v rx may be about several mV, for example, and is amplified as necessary.
  • the amplification unit 3B having the OP amplifier 32 performs amplification of several hundred times, for example, to obtain an amplified AC voltage component v rx ′.
  • the direct current conversion unit 3C converts alternating current into direct current so that the magnitude of the amplified alternating voltage component v rx ′ can be easily evaluated.
  • the DC converter 3C is configured by a voltage doubler rectifier circuit 33 in the illustrated example, and performs further amplification simultaneously with the rectification. In this way, the internal resistance measurement unit 3 outputs the measurement value r x of the internal resistance as a DC voltage. The measured value r x of the internal resistance is transmitted to the control unit 6.
  • the configuration of the internal resistance measuring unit 3 can be any configuration as long as it has functions of extraction, amplification and DC conversion of AC voltage components.

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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  • General Physics & Mathematics (AREA)
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  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un dispositif et un procédé permettant de déterminer la détérioration d'une batterie secondaire, lesquels sont capables de déterminer une détérioration sur la base d'une valeur de mesure de résistance interne lors d'une mesure de résistance interne permettant de déterminer le degré de détérioration de la batterie secondaire, sans affecter l'état de charge de la batterie secondaire. A cet effet, l'invention porte sur un dispositif permettant de déterminer la détérioration d'une batterie secondaire, lequel dispositif est caractérisé en ce qu'il comprend : un moyen de mesure de tension de puissance stockée qui mesure la tension de puissance stockée de la batterie secondaire ; un moyen de mesure de résistance interne qui mesure la résistance interne de la batterie secondaire ; un moyen de correction de résistance interne qui dérive une résistance interne corrigée en exécutant un traitement de conversion, en une résistance interne à une tension de puissance stockée de référence permettant de déterminer la détérioration de la batterie secondaire, ou une valeur approximative de celle-ci, une valeur de mesure de la résistance interne lorsque la valeur de mesure de la tension de puissance stockée est obtenue ; et un moyen d'affichage qui affiche un résultat de détermination de détérioration de la batterie secondaire en fonction de la résistance interne corrigée dérivée.
PCT/JP2017/037525 2016-10-19 2017-10-17 Dispositif et procédé permettant de déterminer la détérioration d'une batterie secondaire WO2018074469A1 (fr)

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JP2016039742A (ja) * 2014-08-11 2016-03-22 Ntn株式会社 充電装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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