WO2012090983A1 - Dispositif de mesure de capacité restante - Google Patents

Dispositif de mesure de capacité restante Download PDF

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Publication number
WO2012090983A1
WO2012090983A1 PCT/JP2011/080159 JP2011080159W WO2012090983A1 WO 2012090983 A1 WO2012090983 A1 WO 2012090983A1 JP 2011080159 W JP2011080159 W JP 2011080159W WO 2012090983 A1 WO2012090983 A1 WO 2012090983A1
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WO
WIPO (PCT)
Prior art keywords
battery
remaining capacity
remaining
measuring device
capacity
Prior art date
Application number
PCT/JP2011/080159
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English (en)
Japanese (ja)
Inventor
勝男 岡田
Original Assignee
有限会社オーエイチケー研究所
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Filing date
Publication date
Application filed by 有限会社オーエイチケー研究所 filed Critical 有限会社オーエイチケー研究所
Publication of WO2012090983A1 publication Critical patent/WO2012090983A1/fr

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    • 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]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables

Definitions

  • the present invention relates to a remaining capacity measuring device for measuring (estimating) the remaining capacity of a battery such as a forklift, an electric vehicle, or a hybrid vehicle.
  • a resistor is provided between the first connection terminal and the second connection terminal.
  • a shunt resistor configured as described above is used.
  • the first connection terminal, the second connection terminal, and the resistor are formed in a washer shape, and the first connection terminal, the second connection terminal, and the resistance are formed using bolts and nuts. The body is fixed together.
  • Patent Document 2 Japanese Patent Laid-Open No. 2007-198904
  • a core having an annular shape and a gap portion is used.
  • the Hall element detects a magnetic field corresponding to the magnitude of the current flowing through the current line surrounded by the core, and measures the current.
  • the shunt resistor generates heat. Therefore, it is necessary to perform temperature correction according to the generated heat. In order to perform such zero point correction and temperature correction, it is usually necessary to correct the remaining capacity meter while the use of the battery is temporarily stopped.
  • the remaining capacity meter will be distorted without the zero point correction or temperature correction of the remaining capacity meter, and the remaining capacity meter will remain sufficiently on the display. Nevertheless, the power of the vehicle suddenly dropped or stopped.
  • the present invention is based on a load voltage-based remaining capacity table determined for each battery, and automatically updates the initial value setting at the time of remaining capacity measurement by the remaining capacity measuring device. It is an object of the present invention to provide a remaining capacity measuring device that does not require zero correction or temperature correction.
  • the remaining capacity measuring device of the present invention is a remaining capacity measuring device for measuring the remaining capacity of a battery.
  • a measuring means for measuring remaining capacity related data A storage unit storing a preset remaining capacity table and a preset upper limit value of the remaining capacity of the battery, and storing remaining capacity related data measured by the measuring unit;
  • An arithmetic device that calculates the remaining capacity of the battery based on the remaining capacity related data stored in the storage means,
  • the storage means sequentially stores the measured remaining capacity related data of the battery during charging and discharging, and calculates the remaining capacity of the battery based on the remaining capacity related data of the battery stored in the storing means.
  • the remaining capacity of the battery exceeds the upper limit value of the remaining capacity, the upper limit value of the remaining capacity is updated with the remaining capacity of the battery, At the end of battery discharge, the remaining battery capacity is corrected based on the remaining capacity table.
  • the remaining capacity measuring device of the present invention measures the voltage value of the battery by the measuring means when charging the battery, and selects a predetermined charging efficiency coefficient based on the voltage value of the battery, The remaining capacity of the battery is calculated by the computing means based on the measured battery charging current flowing in the battery and the predetermined charging efficiency coefficient stored in the storage means. To do.
  • the remaining capacity measuring device of the present invention when discharging the battery, The remaining capacity of the battery is calculated by the calculation means based on a measured battery discharge current discharged from the battery and a predetermined discharge efficiency coefficient stored in the storage means.
  • the remaining capacity measuring device of the present invention is configured to measure a voltage value of a battery by the measuring means and to select a predetermined discharge efficiency coefficient based on the voltage value of the battery. To do.
  • the remaining capacity measuring device of the present invention is characterized in that the remaining capacity measuring device includes a display means for displaying at least the remaining capacity of the battery. Further, the remaining capacity measuring device of the present invention comprises a communication means for the remaining capacity measuring apparatus to communicate with at least one of the display means, an external storage means, and an external computer. It is characterized by.
  • the battery is provided with an individual identification number for each battery,
  • the storage means stores remaining capacity related data associated with a battery identification number.
  • the remaining capacity measuring device of the present invention includes the remaining capacity measuring device, A battery-side terminal for connection to the battery terminal; An output side terminal constituting the output side terminal, and The battery side terminal and the output side terminal are respectively plug-in connectors.
  • the remaining capacity measuring device of the present invention is configured to output an alarm when the arithmetic device detects a battery abnormality during charging / discharging of the battery.
  • the remaining capacity measuring device of the present invention is configured to output an alarm when the remaining capacity of the battery falls below a predetermined alarm lower limit value at the time of charge / discharge of the battery. .
  • the remaining capacity is corrected at the end of the battery discharge, and the upper limit value of the remaining capacity is updated at the end of the battery charging.
  • FIG. 1 is a schematic circuit diagram of a remaining capacity measuring apparatus according to the present invention.
  • FIG. 2 is a schematic configuration diagram when the remaining capacity measuring device of FIG. 1 is connected to a battery.
  • FIG. 3 is a schematic configuration diagram illustrating an example of a plug-in connector.
  • FIG. 4 is a schematic configuration diagram when the remaining capacity measuring device of FIG. 1 is connected to an external storage device and a computer by wireless communication.
  • FIG. 5 is a flowchart showing a flow of measuring the remaining capacity during charging / discharging of the battery by the remaining capacity measuring apparatus of the present invention.
  • FIG. 6 is a graph showing the relationship between the battery voltage (V) and the remaining capacity (% capacity) during charging / discharging of the battery, measured by the remaining capacity measuring device of the present invention.
  • V battery voltage
  • % capacity % capacity
  • FIG. 7 is an example showing an abnormality of the battery, and is a graph showing the relationship between the number of times the battery has been charged and the amount of charge (AH) when only insufficient charging can be performed.
  • FIG. 8 shows an example of battery abnormality, and shows the relationship between the battery charge-discharge amount (AH) and the battery voltage (V) when the battery voltage value suddenly drops when the battery is discharged. It is a graph.
  • FIG. 1 is a schematic circuit configuration diagram of the remaining capacity measuring device of the present invention
  • FIG. 2 is a schematic configuration diagram when the remaining capacity measuring device of FIG. 1 is connected to a battery.
  • a remaining capacity measuring device 10 of the present invention includes a measuring means 20 including a shunt resistor 22, a storage means 24 for storing measured remaining capacity related data, and a remaining capacity measuring apparatus. 10 for calculating 10 and calculating the remaining capacity, a battery-side positive terminal 12a and a battery-side negative terminal 12b for connecting to the battery 50, an output-side positive terminal 14a for connecting to a vehicle and a charger, The output side negative terminal 14b is provided.
  • the end portions of the battery side positive terminal 12a, the battery side negative terminal 12b, the output side positive terminal 14a, and the output side negative terminal 14b are easily connected to the battery 50 and an output side device (not shown), respectively.
  • the plug-in connector 16 as shown in FIG. 3 is provided so that it can be attached to and detached from the connector, but the shape of the terminal is not particularly limited.
  • the plug-in connector 16 shown in FIG. 3 is configured by connecting the battery-side positive terminal 12a and the battery-side negative terminal 12b (or the output-side positive terminal 14a and the output-side negative terminal 14b) to one connector body 18. Yes.
  • a battery 50 or an output side device (not shown) having a female positive socket and a female negative socket fitted to the male positive socket 18a and male negative socket 18b provided in the connector main body 18; Connection is possible.
  • Reference numeral 18c denotes a lock mechanism for preventing the plug-in connector 16 from coming off due to vibration or the like when connected to the battery 50 and an output device (not shown).
  • Such a plug-in connector 16 is used to easily attach and remove the remaining capacity measuring device 10 of the present invention between the battery 50 to be measured and an output device (not shown).
  • the remaining capacity measuring device 10 of the present invention may be attached between the battery 50 and an output side device (not shown) without using the plug-in connector 16. .
  • the measuring means 20 detects the battery current when the battery 50 is charged and discharged.
  • the detected battery current value is input to the storage means 24 as one of the remaining capacity related data, and is sequentially stored.
  • the battery current value stored in the storage means 24 as the remaining capacity related data is stored as data related to the time, and based on the battery current value and the time, the charge amount when the battery 50 is charged or The amount of discharge during discharge can be calculated by the calculation means 30.
  • the remaining capacity related data not only the battery current amount but also the battery voltage value at the time of charging / discharging of the battery 50, the calculated remaining capacity of the battery 50, and the like can be stored.
  • the battery 50 can be more accurately charged based on the battery current value, the battery voltage value, and the time.
  • the amount of charge and the amount of discharge at the time of discharging can be calculated by the computing means 30.
  • RAM Random Access Memory
  • flash memory nonvolatile semiconductor memory
  • hard disk drive any storage means such as RAM (Random Access Memory), flash memory (nonvolatile semiconductor memory), and hard disk drive.
  • the calculation means 30 is, for example, a CPU (Central Processing Unit) capable of general-purpose calculation processing or an IC (Integrated Circuit) capable of only the calculation processing used in the remaining capacity measuring apparatus 10 of the present invention.
  • a CPU Central Processing Unit
  • IC Integrated Circuit
  • the remaining capacity measuring device 10 of the present embodiment is provided with a display 40 that constitutes display means.
  • the display for display 40 is configured to display at least the remaining capacity of the battery 50 calculated by the calculation means 30.
  • the data displayed on the display 40 is not limited to the remaining capacity of the battery 50.
  • the battery voltage value or current value of the battery 50 may be displayed.
  • a thermometer may be provided in the battery 50 so that the temperature of the battery is displayed. In these cases, the data display can be switched according to the input from the data input means 38, which will be described later.
  • the display 40 is connected to the calculation means 30 and is integrally configured as the remaining capacity measuring device 10, but a wired cable (not shown) is provided by providing a communication means 36 as will be described later. And the remaining capacity measuring device 10 and the display 40 can be connected by wireless communication, so that the display 40 can be configured as a separate device from the remaining capacity measuring device 10 main body.
  • the remaining capacity measuring device 10 includes a communication unit 36, and can be connected to the display 40 as described above, or via a radio wave 36a as shown in FIG. Wireless communication with the data input means 38, the storage device 52, and the computer 54 provided outside.
  • the remaining capacity related data that cannot be stored in the storage unit 24 of the remaining capacity measuring device 10 is stored in the external storage device 52 or the computer 54. It is also possible to perform a precise diagnosis of the battery 50 by the computer 54 based on the stored remaining capacity related data.
  • the communication means 36 is not particularly limited, and may be wired communication or wireless communication.
  • the remaining capacity measuring device 10 includes a data input unit 38.
  • the data input means 38 is used when setting a temporary remaining capacity initial value when the remaining capacity of the battery 50 is measured for the first time, or switching data displayed on the display 40 for display.
  • an individual identification number can be assigned to each battery in order to identify the battery.
  • the remaining capacity related data is stored in the storage unit 24 in a state associated with the identification number.
  • the remaining capacity measuring device 10 can store the remaining capacity related data of a plurality of batteries based on the identification number. The remaining capacity can be measured (estimated) in parallel.
  • the remaining capacity measuring device 10 of the present invention connected between the battery 50 and an output device (not shown), the identification number of the battery 50 is assigned to the remaining capacity measuring device 10. Is stored in the storage means 24.
  • the battery voltage of the battery 50 is measured by the measuring unit 20 and stored in the storage unit 24 (S12). . If the battery voltage has not reached the charging overvoltage value Vc, Kc1 is selected as the charging efficiency coefficient (S13), and if the battery voltage has reached the charging overvoltage value Vc, Kc2 is selected as the charging efficiency coefficient. (S14).
  • the charging efficiency coefficients Kc1 and Kc2 represent the proportion of the current flowing in the battery 50 that is actually charged. If the charging efficiency coefficients Kc1 and Kc2 are in a state before the charging overvoltage value Vc is reached, Kc1 is, for example, 0 .9 (90%) can be set, but when the charging overvoltage value Vc is reached, Kc2 is, for example, about 0.2 (20%).
  • the charging efficiency coefficient Kc may be selected from three or more by setting a plurality of charging overvoltage values Vc.
  • the remaining capacity of the battery 50 is calculated as shown in Equation 1 by using the battery charging current Ac and the charging efficiency coefficient Kc measured by the measuring means 20 and stored in the storage means 24. To do.
  • the remaining capacity of the battery 50 after the completion of charging exceeds the upper limit value Zm of the remaining capacity stored in the storage unit 24, the upper limit value of the remaining capacity stored in the storage unit 24 Update Zm.
  • the remaining capacity of the battery 50 can be calculated by subtracting the discharge amount from the upper limit value Zm of the remaining capacity.
  • the battery voltage of the battery 50 is measured by the measuring unit 20 and stored in the storage unit 24 (S20).
  • the discharge efficiency coefficient Kd is set (S21), and the battery discharge current Ad and the discharge efficiency coefficient Kd measured by the measuring means 20 and stored in the storage means 24 are set.
  • the discharge efficiency coefficient Kd represents the proportion of the current actually discharged from the current flowing from the battery 50, and is set as appropriate depending on the type of the battery 50, the type of the device on the output side, and the like. Value.
  • the charging efficiency coefficient may be configured to select from a plurality of discharging efficiency coefficients according to the battery voltage.
  • the remaining capacity alarm is output. (S25).
  • a method such as sound, light, display on the display 40 can be used.
  • the remaining capacity alarm is monitored by a timer (S26), and when the remaining capacity alarm output time reaches the timer duration T, the remaining capacity alarm is reset.
  • the remaining capacity of the battery 50 is corrected based on the battery voltage of the battery 50 after the end of discharge and the remaining capacity tables ZT1 to ZT5. Specifically, based on the remaining capacity tables ZT1 to ZT5, for example, the remaining capacity correction function Zc (V) is obtained using linear interpolation or linear approximation.
  • the remaining voltage Zt at the end of discharge is obtained by substituting the battery voltage of the battery 50 at the end of discharge into the remaining capacity correction function Zc (V). Then, this remaining capacity Zt is stored in the storage means 24 as the current remaining capacity of the battery 50.
  • the remaining capacity tables ZT1 to ZT5 indicate the relationship between the battery voltage and the remaining capacity when the battery 50 is in use (load state).
  • the remaining capacity tables ZT1 to ZT5 are theoretically based on the rated capacity, rated voltage, etc. of the battery 50. It can also be obtained by performing a close inspection of the battery 50.
  • the number of remaining capacity tables is not particularly limited, and it is sufficient that a number sufficient to create the remaining capacity correction function Zc (V) is stored.
  • an alarm is output when the remaining capacity of the battery 50 falls below the alarm lower limit value Zl or when the battery voltage of the battery 50 falls below the alarm lower limit voltage value Vl.
  • the alarm may be output even in a state in which the battery voltage value is suddenly decreased during the discharge of the battery as shown in FIG.
  • the present invention has been described above.
  • the present invention is not limited to this.
  • the battery 50 is periodically inspected to check the remaining capacity tables ZT1 to ZT5 and the charge overvoltage value.
  • Various changes can be made without departing from the object of the present invention, such as appropriately updating an initial value such as Vc.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Secondary Cells (AREA)

Abstract

[Problème] Le but de l'invention est de concevoir un dispositif de mesure de capacité restante dans lequel le besoin de correction de zéro, de correction de température et analogue est éliminé par la mise à jour automatique d'un réglage de valeur initiale par le dispositif de mesure de capacité restante lors de la mesure de la capacité restante, ceci en fonction d'une table de capacité restante établie pour chaque batterie. [Solution] A cette fin, le dispositif de mesure de capacité restante comprend : un moyen de mesure afin de mesurer des données de capacité restante ; un moyen d'enregistrement dans lequel sont enregistrées une table de capacité restante préétablie et une valeur limite supérieure préétablie pour la capacité de batterie restante, et qui enregistre les données de capacité restante mesurées par le moyen de mesure ; et un dispositif de calcul afin de calculer la capacité de batterie restante en fonction des données de capacité restante enregistrées par le moyen d'enregistrement. Les données de capacité de batterie restante mesurées pendant la charge/décharge sont ensuite enregistrées dans le moyen d'enregistrement. La capacité de batterie restante est calculée en fonction des données de capacité de batterie restante enregistrées dans le moyen d'enregistrement. Lorsque la charge de la batterie est terminée, la valeur limite supérieure de la capacité de batterie restante est mise à jour en utilisant la capacité de batterie restante dans le cas où la capacité de batterie restante dépasse la valeur limite supérieure pour la capacité restante. Lorsque la décharge de la batterie est terminée, la capacité de batterie restante est corrigée en fonction de la table de capacité restante.
PCT/JP2011/080159 2010-12-28 2011-12-27 Dispositif de mesure de capacité restante WO2012090983A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010-292591 2010-12-28
JP2010292591A JP2012141172A (ja) 2010-12-28 2010-12-28 残容量測定装置

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WO2012090983A1 true WO2012090983A1 (fr) 2012-07-05

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0677446U (ja) * 1993-03-31 1994-10-28 日本マランツ株式会社 携帯用電子機器の電源装置
JPH07151841A (ja) * 1993-11-29 1995-06-16 Nippondenso Co Ltd 電池残存容量計測装置
JPH10288654A (ja) * 1997-04-14 1998-10-27 Honda Motor Co Ltd バッテリ残容量検出装置
JPH11150809A (ja) * 1997-09-15 1999-06-02 Honda Motor Co Ltd バッテリ・レンタルシステム
JP2003294817A (ja) * 2002-04-03 2003-10-15 Toyota Motor Corp バッテリ容量判定装置
JP2009096417A (ja) * 2007-10-19 2009-05-07 Panasonic Corp バッテリ状態表示システム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0677446U (ja) * 1993-03-31 1994-10-28 日本マランツ株式会社 携帯用電子機器の電源装置
JPH07151841A (ja) * 1993-11-29 1995-06-16 Nippondenso Co Ltd 電池残存容量計測装置
JPH10288654A (ja) * 1997-04-14 1998-10-27 Honda Motor Co Ltd バッテリ残容量検出装置
JPH11150809A (ja) * 1997-09-15 1999-06-02 Honda Motor Co Ltd バッテリ・レンタルシステム
JP2003294817A (ja) * 2002-04-03 2003-10-15 Toyota Motor Corp バッテリ容量判定装置
JP2009096417A (ja) * 2007-10-19 2009-05-07 Panasonic Corp バッテリ状態表示システム

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