WO2015001861A1 - Battery charging/discharging control device and battery charging/discharging control method - Google Patents

Battery charging/discharging control device and battery charging/discharging control method Download PDF

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Publication number
WO2015001861A1
WO2015001861A1 PCT/JP2014/063473 JP2014063473W WO2015001861A1 WO 2015001861 A1 WO2015001861 A1 WO 2015001861A1 JP 2014063473 W JP2014063473 W JP 2014063473W WO 2015001861 A1 WO2015001861 A1 WO 2015001861A1
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WIPO (PCT)
Prior art keywords
battery
output
charge
equal
discharge
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PCT/JP2014/063473
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French (fr)
Japanese (ja)
Inventor
勇悟 茂木
剛史 渡邊
麻巳 穂積
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日産自動車株式会社
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Publication of WO2015001861A1 publication Critical patent/WO2015001861A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • 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
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1438—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle in combination with power supplies for loads other than batteries
    • 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
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/1446—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle in response to parameters of a vehicle
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/46—The network being an on-board power network, i.e. within a vehicle for ICE-powered road vehicles
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles

Definitions

  • the present invention relates to a battery charge / discharge control device and a battery charge / discharge control method.
  • a control method described in JP2010-209733A is known as a method for controlling charge / discharge of a battery according to the state of the battery. In the control method of JP2010-209733A, battery discharge is prohibited when the output of the battery is low.
  • the present invention aims to provide a technique for reducing the frequency of using a battery in a low output area.
  • the output of the battery when the output of the battery is equal to or lower than the first predetermined output, the output of the battery is equal to or higher than the second predetermined output which is higher than the first predetermined output.
  • the battery is charged and the operation of the battery charge / discharge control device is stopped in the middle of charging, the battery is charged so that the output of the battery becomes equal to or higher than the second predetermined output even after the start of the next operation. .
  • FIG. 1 is a system configuration diagram of a vehicle to which a battery charge / discharge control device according to an embodiment is applied.
  • FIG. 2 is a diagram summarizing the control by the battery charge / discharge control device according to the present embodiment.
  • FIG. 3 is a flowchart illustrating a flow of control performed by the battery charge / discharge control device according to the embodiment.
  • FIG. 1 is a system configuration diagram of a vehicle to which a battery charge / discharge control device according to an embodiment is applied.
  • the alternator 2 generates power using the power of the engine 1.
  • the regulator 3 controls the power generation voltage of the alternator 2 based on the power generation command signal from the USM 5.
  • the electric power generated by the alternator 2 is supplied to the battery 4 and electrical components (not shown) (headlight, air-conditioning blower fan, etc.).
  • the battery 4 is a lead acid battery, for example, and can supply electric power to the electrical components.
  • the USM 5 transmits a power generation command signal to the regulator 3 based on the power generation command from the ECM 6.
  • the ECM 6 controls the entire vehicle system including the control of the engine 1 based on signals input from various controllers and sensors. In particular, the ECM 6 performs charge / discharge control of the battery 4 by a method described later.
  • Signals input to the ECM 6 include the voltage, current and temperature of the battery 4 detected by the battery sensor 7, the temperature of the engine coolant detected by the water temperature sensor 8, and the intake of the engine 1 detected by the intake air temperature sensor 9.
  • the vehicle speed signal is input from ABS ECU 14 to METER ECU 13.
  • FIG. 2 is a diagram summarizing the control performed by the battery charge / discharge control apparatus according to the present embodiment.
  • the output of the battery 4 is a physical value that depends on the state of charge (SOC) of the battery 4 and the degree of deterioration. The higher the SOC and the lower the degree of deterioration, the higher the battery output. In the example shown in FIG. 2, the battery output is divided into three regions of “high”, “medium”, and “low”.
  • control is performed so as not to lower the SOC of the battery 4. That is, the battery 4 is charged by regenerative power generation of the alternator 2 while the vehicle is decelerating and the fuel supply is stopped, and when the deceleration fuel is not being cut, the deceleration fuel is being cut.
  • the discharge of the amount obtained by subtracting the discharged amount out of the amount of charge by regenerative power generation of the alternator 2 is permitted.
  • the alternator 2 is generated by the amount of electricity required by the electrical components, and the SOC of the battery 4 is maintained.
  • the battery 4 is charged until the battery 4 is fully charged. This process is continuously performed when the vehicle is started next time after the vehicle is stopped (the engine 1 is stopped). That is, the battery output is low when the vehicle is started this time, and the battery 4 is charged. Even if the battery is not fully charged and the vehicle is stopped, The battery 4 is charged until the battery 4 is fully charged. Since the SOC is low in the region where the battery output is low and the deterioration of the battery 4 is likely to be accelerated, the battery output may be raised to a high region by charging until the battery is fully charged even after the next vehicle startup. This can reduce the frequency of using the battery 4 in the low output region.
  • FIG. 3 is a flowchart showing a flow of control performed by the battery charge / discharge control device according to the embodiment. The process starting from step S1 is performed by the ECM 6 after the vehicle is started.
  • step S1 it is determined whether or not a starter motor (not shown) has been started in order to start the engine 1. If it is determined that the starter motor has been started, the process proceeds to step S2.
  • step S2 the output voltage VBmin of the battery 4 at the start of the starter motor is obtained.
  • the output voltage VBmin of the battery 4 is detected by the battery sensor 7.
  • step S3 it is determined whether or not the full charge execution flag Fchg is zero.
  • the full charge execution flag Fchg is a flag for determining whether or not the battery 4 is to be fully charged. If Fchg is 1, it means that the battery 4 is fully charged. If it is determined that the full charge execution flag Fchg is 1, the process proceeds to step S6 to charge the battery 4, and if it is determined that the full charge execution flag Fchg is 0, the process proceeds to step S4.
  • step S4 it is determined whether or not the output voltage VBmin of the battery 4 obtained in step S2 is equal to or lower than the first output voltage threshold value VBlow.
  • the output area of the battery 4 is determined based on the output voltage VBmin of the battery 4. That is, it is equivalent to determining whether or not the output of the battery 4 is equal to or lower than the first predetermined output (battery output is low).
  • the first output voltage threshold value VBlow is a threshold value for distinguishing between a low battery output region and a medium region shown in FIG. 2, and the output voltage VBmin of the battery 4 is equal to or lower than the first output voltage threshold value VBlow. If there is, it is determined that the battery output belongs to a low region. If it is determined that the output voltage VBmin of the battery 4 is equal to or lower than the first output voltage threshold VBlow, the process proceeds to step S5.
  • Steps S5 to S9 are performed when the battery output is low.
  • the full charge execution flag Fchg is set to 1 in order to charge the battery 4 until the battery is fully charged.
  • step S6 the battery 4 is charged with the power generated by the alternator 2. More specifically, the ECM 6 issues a power generation command to the USM 5. The USM 5 transmits a power generation command signal to the regulator 3 based on the power generation command from the ECM 6, and the regulator 3 controls the power generation voltage of the alternator 2.
  • step S7 it is determined whether or not the ignition switch 15 operated for the driver to issue a vehicle start command and a start / stop command (including an engine stop command) is on. If it is determined that the ignition switch 15 is off, the process of the flowchart is exited. If it is determined that the ignition switch 15 is on, the process proceeds to step S8.
  • step S8 it is determined whether or not the charging current I of the battery 4 detected by the battery sensor 7 is equal to or less than the full charge determination current threshold Ifull.
  • the charging current I of the battery 4 becomes equal to or less than the full charge determination current threshold Ifull, it is determined that the battery 4 has been fully charged. If it is determined that the charging current I of the battery 4 is greater than the full charge determination current threshold Ifull, the process returns to step S6 in order to continue charging the battery 4, and the charging current I of the battery 4 is less than or equal to the full charge determination current threshold Ifull. If it is determined that there is, the process proceeds to step S9.
  • step S9 since the battery 4 is fully charged, the full charge execution flag Fchg is set to 0, and the process of the flowchart is exited.
  • step S4 If it is determined in step S4 that the output voltage VBmin of the battery 4 is greater than the first output voltage threshold VBlow, the process proceeds to step S10.
  • step S10 it is determined whether or not the output voltage VBmin of the battery 4 obtained in step S2 is greater than or equal to the second output voltage threshold VBhigh (VBhigh> VBlow). This determination is equivalent to determining whether or not the output of the battery 4 is greater than or equal to the second predetermined output (region where the battery output is high).
  • the second output voltage threshold value VBhigh is a threshold value for distinguishing between a region where the battery output is medium and a region where the battery output is high, as shown in FIG.
  • step S11 the output voltage VBmin of the battery 4 is equal to or higher than the second output voltage threshold value VBhigh. If there is, it is determined that the battery output belongs to a high region. If it is determined that the output voltage VBmin of the battery 4 is greater than or equal to the second output voltage threshold VBhigh, the process proceeds to step S11.
  • steps S11 to S17 are performed when the battery output is high.
  • the battery 4 is charged by the amount of discharged electricity Cbt during the previous vehicle start-up (during vehicle travel). Again, the battery 4 is charged using the power generated by the alternator 2.
  • the amount of electric discharge Cbt during the previous vehicle start-up (during vehicle travel) is obtained in step S18, which will be described later, in the process of the flowchart performed during the previous vehicle start-up.
  • step S12 it is determined whether or not the vehicle is decelerating fuel cut. If it is determined that the vehicle is decelerating fuel cut, the process proceeds to step S13. In step S ⁇ b> 13, the battery 4 is charged with the regenerative power generated by the alternator 2.
  • step S14 it is determined whether or not the integrated value of the charging / discharging current I of the battery 4 after starting the vehicle is equal to or greater than minus Ch ( ⁇ Ch) when the discharge allowable electric quantity is Ch.
  • the charging / discharging current I of the battery 4 is a current value detected by the battery sensor 7, and the current at the time of charging is detected as positive and the current at the time of discharging is detected as negative.
  • the balance between the amount of charge of the battery 4 due to the regenerative power generation of the alternator 2 at the time of deceleration fuel cut and the discharge amount of the battery 4 is obtained, and the discharge amount of the battery 4 after the balance calculation is calculated. It is determined whether or not the discharge allowable electric quantity Ch is equal to or larger. If it is determined that the integrated value of the charge / discharge current I of the battery 4 is equal to or greater than minus Ch, the discharge amount of the battery 4 is equal to or less than the discharge allowable electricity amount Ch, and the process proceeds to step S15.
  • step S15 the discharge from the battery 4 to the electrical component is permitted until the discharge amount of the battery 4 after the balance calculation reaches the discharge allowable electricity amount Ch.
  • step S14 if it is determined in step S14 that the integrated value of the charge / discharge current I of the battery 4 after the vehicle is started is less than minus Ch, the process proceeds to step S16.
  • step S16 the alternator 2 generates power at a predetermined voltage (for example, 13V) to supply power to the electrical components. Thereby, the SOC of the battery 4 is maintained without increasing or decreasing.
  • step S17 it is determined whether or not the ignition switch 15 is off. If it is determined that the ignition switch 15 is not off, the process returns to step S12. If it is determined that the ignition switch 15 is off, the process proceeds to step S18.
  • step S18 the amount of electric discharge Cbt from the current vehicle start to the vehicle start / stop is calculated. This is a value obtained by subtracting the amount of charged electricity from the amount of discharged electricity from the time when the vehicle is started to the time when the vehicle is started and stopped, and can be obtained by integrating the charge / discharge current I of the battery 4. This amount of discharged electricity Cbt is used in the control performed after the next vehicle activation (step S11).
  • step S10 If it is determined in step S10 that the output voltage VBmin of the battery 4 is less than the second output voltage threshold VBhigh, the process proceeds to step S19.
  • the processes in steps S19 to S24 are performed when the battery output is in an intermediate region.
  • step S19 it is determined whether or not the vehicle is decelerating fuel cut. If it is determined that the vehicle is decelerating fuel cut, the process proceeds to step S20. In step S ⁇ b> 20, the battery 4 is charged with the regenerative power generated by the alternator 2.
  • step S21 it is determined whether or not the integrated value of the charge / discharge current I of the battery 4 is 0 or more. That is, the balance between the amount that the battery 4 is charged by the regenerative power generation of the alternator 2 at the time of deceleration fuel cut and the amount that the battery 4 is discharged is obtained, and the charge / discharge amount of the battery 4 after the balance calculation is positive (the charge side is It is determined whether it is positive. If it determines with the integrated value of the charging / discharging electric current I of the battery 4 being 0 or more, it will progress to step S22.
  • step S22 discharging from the battery 4 to the electrical component is permitted by the positive charge electricity amount after the balance calculation. This eliminates the need for power generation of the alternator 2, thereby reducing the engine fuel used for driving the alternator 2 and improving the fuel efficiency.
  • step S21 If it determines with the integrated value of the charging / discharging current I of the battery 4 being less than 0 by step S21, it will progress to step S23.
  • the alternator 2 In step S23, the alternator 2 generates power at a predetermined voltage (for example, 13V) to supply power to the electrical components. Thereby, the SOC of the battery 4 is maintained without increasing or decreasing.
  • step S24 it is determined whether or not the ignition switch 15 is off. If it is determined that the ignition switch 15 is not off, the process returns to step S19. If it is determined that the ignition switch 15 is off, the process of the flowchart is exited.
  • the battery 4 in the region where the battery output is low, the battery 4 is charged until the battery 4 is fully charged.
  • the battery output may be performed until the battery output is at least high. Also in this case, the frequency of using the battery 4 in a region where the output is low can be reduced.
  • the output of the battery 4 when the output of the battery 4 is equal to or lower than the first predetermined output, the output of the battery 4 is set to be equal to or higher than the second predetermined output.
  • the battery 4 When charging is performed and the operation of the battery charge / discharge control device is stopped in the middle of charging, the battery 4 is charged so that the output of the battery 4 is equal to or higher than the second predetermined output even after the start of the next operation. . Accordingly, when it is determined that the output of the battery 4 is a low region that is equal to or lower than the first predetermined output, the battery 4 is charged until the output of the battery 4 becomes equal to or higher than the second predetermined output. it can.
  • the battery 4 when the output of the battery is equal to or lower than the first predetermined output, the battery 4 is charged until the charging current of the battery 4 becomes equal to or lower than the predetermined current Ifull, When the operation of the charging / discharging control device for the battery 4 is stopped during the charging, the battery 4 is charged until the charging current of the battery becomes equal to or lower than a predetermined current Ifull even after the next operation starts. Since the predetermined current Ifull corresponds to the charging current when the battery 4 is fully charged, when the output of the battery is equal to or lower than the first predetermined output, the battery 4 is fully charged until the influence of deterioration is small. Charging can be performed, and the frequency with which the battery 4 is used in a region where the output is low can be further reduced.
  • the battery 4 When the output of the battery 4 is equal to or higher than the second predetermined output, if the balance of charge / discharge at the previous operation of the battery charge / discharge control device is discharge, the battery 4 is charged to charge the amount of discharge. . As a result, the amount of discharge during the previous operation can be supplemented by charging during the current operation, so that the battery output can be maintained in a high region, and the frequency with which the battery 4 is used in a region where the output is low is reduced. Can do.
  • the present invention is not limited to the above-described embodiment.
  • the battery charge / discharge control device is applied to a vehicle has been described.
  • the battery 4 is divided into three areas: a high output area, an intermediate area, and a low output area, but the number of output areas is not limited to three.
  • a method for determining whether or not the battery 4 is fully charged is as follows. It is not limited to this method.
  • charging of the battery 4 is performed by power generation of the alternator 4, a generator other than the alternator 4 may be used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

If the output of a battery is less than or equal to a first prescribed output, said battery is charged so as to bring the output thereof to or above a second prescribed output that is higher than the first prescribed output. If a battery charging/discharging operation is stopped with the battery in the middle of being charged, the next time said operation is started, the charging of the battery so as to bring the output thereof to or above the second prescribed output is resumed.

Description

バッテリの充放電制御装置およびバッテリの充放電制御方法Battery charge / discharge control device and battery charge / discharge control method
　本発明は、バッテリの充放電制御装置およびバッテリの充放電制御方法に関する。 The present invention relates to a battery charge / discharge control device and a battery charge / discharge control method.
　バッテリの状態に応じて、バッテリの充放電を制御する方法として、ＪＰ２０１０－２０９７３３Ａに記載の制御方法が知られている。ＪＰ２０１０－２０９７３３Ａの制御方法では、バッテリの出力が低い場合に、バッテリの放電を禁止している。 A control method described in JP2010-209733A is known as a method for controlling charge / discharge of a battery according to the state of the battery. In the control method of JP2010-209733A, battery discharge is prohibited when the output of the battery is low.
　しかしながら、ＪＰ２０１０－２０９７３３Ａに記載の制御方法では、バッテリの出力が低い場合に、バッテリの放電を禁止するだけなので、充放電状況によっては、出力が低い領域でバッテリを使う頻度が高くなってしまう。 However, according to the control method described in JP2010-209733A, when the output of the battery is low, only discharging of the battery is prohibited. Therefore, the frequency of using the battery in a low output area increases depending on the charge / discharge status.
　本発明は、出力が低い領域でバッテリを使う頻度を低減する技術を提供することを目的とする。 The present invention aims to provide a technique for reducing the frequency of using a battery in a low output area.
　本発明によるバッテリの充放電制御装置は、バッテリの出力が第１の所定出力以下である場合、バッテリの出力が、第１の所定出力より高い値である第２の所定出力以上となるようにバッテリの充電を行い、充電の途中でバッテリの充放電制御装置の動作を停止した場合には、次回の動作開始後もバッテリの出力が第２の所定出力以上となるようにバッテリの充電を行う。 In the battery charge / discharge control device according to the present invention, when the output of the battery is equal to or lower than the first predetermined output, the output of the battery is equal to or higher than the second predetermined output which is higher than the first predetermined output. When the battery is charged and the operation of the battery charge / discharge control device is stopped in the middle of charging, the battery is charged so that the output of the battery becomes equal to or higher than the second predetermined output even after the start of the next operation. .
　本発明の実施形態については、添付された図面とともに以下に詳細に説明される。 Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
図１は、一実施の形態におけるバッテリの充放電制御装置が適用される車両のシステム構成図である。FIG. 1 is a system configuration diagram of a vehicle to which a battery charge / discharge control device according to an embodiment is applied. 図２は、本実施の形態におけるバッテリの充放電制御装置による制御の概要をまとめた図である。FIG. 2 is a diagram summarizing the control by the battery charge / discharge control device according to the present embodiment. 図３は、一実施の形態におけるバッテリの充放電制御装置によって行われる制御の流れを示すフローチャートである。FIG. 3 is a flowchart illustrating a flow of control performed by the battery charge / discharge control device according to the embodiment.
　図１は、一実施の形態におけるバッテリの充放電制御装置が適用される車両のシステム構成図である。オルタネータ２は、エンジン１の動力により発電を行う。レギュレータ３は、ＵＳＭ５からの発電指令信号に基づいて、オルタネータ２の発電電圧を制御する。オルタネータ２によって発電された電力は、バッテリ４や図示しない電装部品（ヘッドライトや空調用ブロアファン等）に供給される。バッテリ４は、例えば鉛酸バッテリであり、電装部品に電力を供給可能である。 FIG. 1 is a system configuration diagram of a vehicle to which a battery charge / discharge control device according to an embodiment is applied. The alternator 2 generates power using the power of the engine 1. The regulator 3 controls the power generation voltage of the alternator 2 based on the power generation command signal from the USM 5. The electric power generated by the alternator 2 is supplied to the battery 4 and electrical components (not shown) (headlight, air-conditioning blower fan, etc.). The battery 4 is a lead acid battery, for example, and can supply electric power to the electrical components.
　ＵＳＭ５は、ＥＣＭ６からの発電指令に基づいて、発電指令信号をレギュレータ３に送信する。 The USM 5 transmits a power generation command signal to the regulator 3 based on the power generation command from the ECM 6.
　ＥＣＭ６は、様々なコントローラやセンサから入力される信号に基づいて、エンジン１の制御を含む車両システム全体の制御を行う。特に、ＥＣＭ６は、後述する方法により、バッテリ４の充放電制御を行う。 The ECM 6 controls the entire vehicle system including the control of the engine 1 based on signals input from various controllers and sensors. In particular, the ECM 6 performs charge / discharge control of the battery 4 by a method described later.
　ＥＣＭ６に入力される信号としては、バッテリセンサ７によって検出されるバッテリ４の電圧、電流および温度、水温センサ８によって検出されるエンジン冷却水の温度、吸気温センサ９によって検出されるエンジン１の吸入空気の温度、ブレーキスイッチ１０から入力されるブレーキスイッチ信号、ＣＶＴＣＵ１１から入力されるロックアップ信号、ＢＣＭ１２から入力されるブロアファン作動信号、ＭＥＴＥＲＥＣＵ１３から入力される車速信号、イグニッションスイッチ１５のオン／オフ信号などがある。車速信号は、ＡＢＳＥＣＵ１４からＭＥＴＥＲＥＣＵ１３に入力される。 Signals input to the ECM 6 include the voltage, current and temperature of the battery 4 detected by the battery sensor 7, the temperature of the engine coolant detected by the water temperature sensor 8, and the intake of the engine 1 detected by the intake air temperature sensor 9. Air temperature, brake switch signal input from brake switch 10, lockup signal input from CVTCU 11, blower fan operation signal input from BCM 12, vehicle speed signal input from METER ECU 13, ignition switch 15 on / off signal and so on. The vehicle speed signal is input from ABS ECU 14 to METER ECU 13.
　図２は、本実施の形態におけるバッテリの充放電制御装置による制御の概要をまとめた図である。バッテリ４の出力は、バッテリ４の充電状態（ＳＯＣ：State of charge）と劣化度合いに依存する物理値であり、ＳＯＣが高いほど、また劣化度が小さいほど、バッテリ出力は高くなる。図２に示す例では、バッテリ出力を「高」、「中」、「低」の３つの領域に分けている。 FIG. 2 is a diagram summarizing the control performed by the battery charge / discharge control apparatus according to the present embodiment. The output of the battery 4 is a physical value that depends on the state of charge (SOC) of the battery 4 and the degree of deterioration. The higher the SOC and the lower the degree of deterioration, the higher the battery output. In the example shown in FIG. 2, the battery output is divided into three regions of “high”, “medium”, and “low”.
　バッテリ出力が高い領域では、バッテリ４のＳＯＣが高く、かつ劣化度が小さいため、バッテリ４から電装部品への一定量の放電を許可する。バッテリ４から電装部品への放電を許可することによって、オルタネータ２の発電を停止させることができるので、オルタネータ２の駆動のために使用されるエンジン燃料を削減することができ、燃費を向上することができる。また、バッテリ出力が高い領域では、車両起動後に、前回の車両走行時に放電した量を充電する。 In the region where the battery output is high, since the SOC of the battery 4 is high and the degree of deterioration is small, a certain amount of discharge from the battery 4 to the electrical component is permitted. By permitting the discharge from the battery 4 to the electrical components, the power generation of the alternator 2 can be stopped, so that the engine fuel used for driving the alternator 2 can be reduced and the fuel consumption can be improved. Can do. In the region where the battery output is high, the amount discharged during the previous vehicle travel is charged after the vehicle starts.
　バッテリ出力が中程度の領域では、バッテリ４のＳＯＣを低下させないようにする制御を行う。すなわち、車両が減速状態で、かつ燃料供給を停止している減速燃料カット中には、オルタネータ２の回生発電によってバッテリ４の充電を行い、減速燃料カット中ではない場合には、減速燃料カット中のオルタネータ２の回生発電による充電量のうち、放電した量を差し引いた量の放電を許可する。また、それ以外の場合には、電装部品が必要な電気量だけオルタネータ２を発電させて、バッテリ４のＳＯＣを維持する。 In the region where the battery output is medium, control is performed so as not to lower the SOC of the battery 4. That is, the battery 4 is charged by regenerative power generation of the alternator 2 while the vehicle is decelerating and the fuel supply is stopped, and when the deceleration fuel is not being cut, the deceleration fuel is being cut. The discharge of the amount obtained by subtracting the discharged amount out of the amount of charge by regenerative power generation of the alternator 2 is permitted. In other cases, the alternator 2 is generated by the amount of electricity required by the electrical components, and the SOC of the battery 4 is maintained.
　バッテリ出力が低い領域では、バッテリ４が満充電になるまで、バッテリ４の充電を行う。この処理は、車両が停止（エンジン１が停止）した後の次回の車両起動時にも継続して行う。すなわち、今回の車両起動時にバッテリ出力が低い領域であって、バッテリ４の充電を行ったが、バッテリ４が満充電状態とならずに車両を停止した場合であっても、次回の車両起動後には、バッテリ４が満充電になるまで、バッテリ４の充電を行う。バッテリ出力が低い領域では、ＳＯＣが低く、バッテリ４の劣化が促進されやすいため、次回の車両起動後にも継続して満充電となるまで充電を行うことにより、バッテリ出力を高い領域まで持ち上げることができ、出力が低い領域でバッテリ４を使う頻度を低減することができる。 In the region where the battery output is low, the battery 4 is charged until the battery 4 is fully charged. This process is continuously performed when the vehicle is started next time after the vehicle is stopped (the engine 1 is stopped). That is, the battery output is low when the vehicle is started this time, and the battery 4 is charged. Even if the battery is not fully charged and the vehicle is stopped, The battery 4 is charged until the battery 4 is fully charged. Since the SOC is low in the region where the battery output is low and the deterioration of the battery 4 is likely to be accelerated, the battery output may be raised to a high region by charging until the battery is fully charged even after the next vehicle startup. This can reduce the frequency of using the battery 4 in the low output region.
　図３は、一実施の形態におけるバッテリの充放電制御装置によって行われる制御の流れを示すフローチャートである。ステップＳ１から始まる処理は、車両起動後に、ＥＣＭ６によって行われる。 FIG. 3 is a flowchart showing a flow of control performed by the battery charge / discharge control device according to the embodiment. The process starting from step S1 is performed by the ECM 6 after the vehicle is started.
　ステップＳ１では、エンジン１を始動するために、図示しないスタータモータの始動が行われたか否かを判定する。スタータモータの始動が行われたと判定するとステップＳ２に進む。 In step S1, it is determined whether or not a starter motor (not shown) has been started in order to start the engine 1. If it is determined that the starter motor has been started, the process proceeds to step S2.
　ステップＳ２では、スタータモータの始動時におけるバッテリ４の出力電圧ＶＢminを求める。バッテリ４の出力電圧ＶＢminは、バッテリセンサ７によって検出される。 In step S2, the output voltage VBmin of the battery 4 at the start of the starter motor is obtained. The output voltage VBmin of the battery 4 is detected by the battery sensor 7.
　ステップＳ３では、満充電実行フラグＦｃｈｇが０であるか否かを判定する。満充電実行フラグＦｃｈｇは、バッテリ４を満充電状態まで充電するか否かを判定するためのフラグであり、Ｆｃｈｇが１であれば、満充電状態まで充電することを意味する。満充電実行フラグＦｃｈｇが１であると判定すると、バッテリ４の充電を行うためにステップＳ６に進み、満充電実行フラグＦｃｈｇが０であると判定すると、ステップＳ４に進む。 In step S3, it is determined whether or not the full charge execution flag Fchg is zero. The full charge execution flag Fchg is a flag for determining whether or not the battery 4 is to be fully charged. If Fchg is 1, it means that the battery 4 is fully charged. If it is determined that the full charge execution flag Fchg is 1, the process proceeds to step S6 to charge the battery 4, and if it is determined that the full charge execution flag Fchg is 0, the process proceeds to step S4.
　ステップＳ４では、ステップＳ２で求めたバッテリ４の出力電圧ＶＢminが第１の出力電圧閾値ＶＢlow以下であるか否かを判定する。ここでは、バッテリ４の出力電圧ＶＢminに基づいて、バッテリ４の出力領域を判定する。すなわち、バッテリ４の出力が第１の所定出力以下（バッテリ出力が低い領域）であるか否かを判定しているのに等しい。第１の出力電圧閾値ＶＢlowは、図２に示す、バッテリ出力が低い領域と中程度の領域とを区分けするための閾値であり、バッテリ４の出力電圧ＶＢminが第１の出力電圧閾値ＶＢlow以下であれば、バッテリ出力が低い領域に属していると判断する。バッテリ４の出力電圧ＶＢminが第１の出力電圧閾値ＶＢlow以下であると判定すると、ステップＳ５に進む。 In step S4, it is determined whether or not the output voltage VBmin of the battery 4 obtained in step S2 is equal to or lower than the first output voltage threshold value VBlow. Here, the output area of the battery 4 is determined based on the output voltage VBmin of the battery 4. That is, it is equivalent to determining whether or not the output of the battery 4 is equal to or lower than the first predetermined output (battery output is low). The first output voltage threshold value VBlow is a threshold value for distinguishing between a low battery output region and a medium region shown in FIG. 2, and the output voltage VBmin of the battery 4 is equal to or lower than the first output voltage threshold value VBlow. If there is, it is determined that the battery output belongs to a low region. If it is determined that the output voltage VBmin of the battery 4 is equal to or lower than the first output voltage threshold VBlow, the process proceeds to step S5.
　ステップＳ５～ステップＳ９の処理は、バッテリ出力が低い領域の時に行われる処理である。ステップＳ５では、バッテリ出力が低い領域に属しているため、満充電になるまでバッテリ４の充電を行うために、満充電実行フラグＦｃｈｇを１とする。 Steps S5 to S9 are performed when the battery output is low. In step S5, since the battery output belongs to a low region, the full charge execution flag Fchg is set to 1 in order to charge the battery 4 until the battery is fully charged.
　ステップＳ６では、オルタネータ２の発電電力によってバッテリ４の充電を行う。より具体的には、ＥＣＭ６はＵＳＭ５に発電指令を出す。ＵＳＭ５は、ＥＣＭ６からの発電指令に基づいて、発電指令信号をレギュレータ３に送信し、レギュレータ３はオルタネータ２の発電電圧を制御する。 In step S6, the battery 4 is charged with the power generated by the alternator 2. More specifically, the ECM 6 issues a power generation command to the USM 5. The USM 5 transmits a power generation command signal to the regulator 3 based on the power generation command from the ECM 6, and the regulator 3 controls the power generation voltage of the alternator 2.
　ステップＳ７では、運転者が車両の起動指令および起動停止指令（エンジン停止指令を含む）を発するために操作するイグニッションスイッチ１５がオンであるか否かを判定する。イグニッションスイッチ１５がオフであると判定するとフローチャートの処理を抜け、オンであると判定すると、ステップＳ８に進む。 In step S7, it is determined whether or not the ignition switch 15 operated for the driver to issue a vehicle start command and a start / stop command (including an engine stop command) is on. If it is determined that the ignition switch 15 is off, the process of the flowchart is exited. If it is determined that the ignition switch 15 is on, the process proceeds to step S8.
　ステップＳ８では、バッテリセンサ７によって検出されるバッテリ４の充電電流Ｉが満充電判定電流閾値Ｉfull以下であるか否かを判定する。ここでは、バッテリ４の充電電流Ｉが満充電判定電流閾値Ｉfull以下になると、バッテリ４が満充電まで充電されたと判定する。バッテリ４の充電電流Ｉが満充電判定電流閾値Ｉfullより大きいと判定すると、バッテリ４の充電を継続して行うためにステップＳ６に戻り、バッテリ４の充電電流Ｉが満充電判定電流閾値Ｉfull以下であると判定すると、ステップＳ９に進む。 In step S8, it is determined whether or not the charging current I of the battery 4 detected by the battery sensor 7 is equal to or less than the full charge determination current threshold Ifull. Here, when the charging current I of the battery 4 becomes equal to or less than the full charge determination current threshold Ifull, it is determined that the battery 4 has been fully charged. If it is determined that the charging current I of the battery 4 is greater than the full charge determination current threshold Ifull, the process returns to step S6 in order to continue charging the battery 4, and the charging current I of the battery 4 is less than or equal to the full charge determination current threshold Ifull. If it is determined that there is, the process proceeds to step S9.
　ステップＳ９では、バッテリ４が満充電まで充電されたため、満充電実行フラグＦｃｈｇを０とし、フローチャートの処理を抜ける。 In step S9, since the battery 4 is fully charged, the full charge execution flag Fchg is set to 0, and the process of the flowchart is exited.
　ステップＳ４で、バッテリ４の出力電圧ＶＢminが第１の出力電圧閾値ＶＢlowより大きいと判定すると、ステップＳ１０に進む。ステップＳ１０では、ステップＳ２で求めたバッテリ４の出力電圧ＶＢminが第２の出力電圧閾値ＶＢhigh（ＶＢhigh＞ＶＢlow）以上であるか否かを判定する。この判定は、バッテリ４の出力が第２の所定出力以上（バッテリ出力が高い領域）であるか否かを判定しているのに等しい。第２の出力電圧閾値ＶＢhighは、図２に示す、バッテリ出力が中程度の領域と高い領域とを区分けするための閾値であり、バッテリ４の出力電圧ＶＢminが第２の出力電圧閾値ＶＢhigh以上であれば、バッテリ出力が高い領域に属していると判断する。バッテリ４の出力電圧ＶＢminが第２の出力電圧閾値ＶＢhigh以上であると判定すると、ステップＳ１１に進む。 If it is determined in step S4 that the output voltage VBmin of the battery 4 is greater than the first output voltage threshold VBlow, the process proceeds to step S10. In step S10, it is determined whether or not the output voltage VBmin of the battery 4 obtained in step S2 is greater than or equal to the second output voltage threshold VBhigh (VBhigh> VBlow). This determination is equivalent to determining whether or not the output of the battery 4 is greater than or equal to the second predetermined output (region where the battery output is high). The second output voltage threshold value VBhigh is a threshold value for distinguishing between a region where the battery output is medium and a region where the battery output is high, as shown in FIG. 2, and the output voltage VBmin of the battery 4 is equal to or higher than the second output voltage threshold value VBhigh. If there is, it is determined that the battery output belongs to a high region. If it is determined that the output voltage VBmin of the battery 4 is greater than or equal to the second output voltage threshold VBhigh, the process proceeds to step S11.
　ステップＳ１１～ステップＳ１７の処理は、バッテリ出力が高い領域の時に行われる処理である。ステップＳ１１では、前回の車両起動中（車両走行中）の放電電気量Ｃｂｔだけ、バッテリ４の充電を行う。ここでも、オルタネータ２の発電電力を用いてバッテリ４の充電を行う。前回の車両起動中（車両走行中）の放電電気量Ｃｂｔは、前回の車両起動中に行われるフローチャートの処理において、後述するステップＳ１８で求められるものである。 The processes in steps S11 to S17 are performed when the battery output is high. In step S11, the battery 4 is charged by the amount of discharged electricity Cbt during the previous vehicle start-up (during vehicle travel). Again, the battery 4 is charged using the power generated by the alternator 2. The amount of electric discharge Cbt during the previous vehicle start-up (during vehicle travel) is obtained in step S18, which will be described later, in the process of the flowchart performed during the previous vehicle start-up.
　ステップＳ１２では、車両が減速燃料カット中であるか否かを判定する。車両が減速燃料カット中であると判定すると、ステップＳ１３に進む。ステップＳ１３では、オルタネータ２の回生発電電力によってバッテリ４の充電を行う。 In step S12, it is determined whether or not the vehicle is decelerating fuel cut. If it is determined that the vehicle is decelerating fuel cut, the process proceeds to step S13. In step S <b> 13, the battery 4 is charged with the regenerative power generated by the alternator 2.
　一方、ステップＳ１２において、車両が減速燃料カット中ではないと判定すると、ステップＳ１４に進む。ステップＳ１４では、車両起動後のバッテリ４の充放電電流Ｉの積算値が放電許容電気量をＣｈとした場合のマイナスＣｈ（－Ｃｈ）以上であるか否かを判定する。バッテリ４の充放電電流Ｉはバッテリセンサ７によって検出される電流値であり、充電時の電流がプラスとして、放電時の電流がマイナスとして検出される。簡単に説明すると、ここでは、減速燃料カット時におけるオルタネータ２の回生発電によってバッテリ４が充電された量と、バッテリ４の放電量との収支を求めて、収支演算後のバッテリ４の放電量が放電許容電気量Ｃｈ以上であるか否かを判定している。バッテリ４の充放電電流Ｉの積算値がマイナスＣｈ以上であると判定すると、バッテリ４の放電量が放電許容電気量Ｃｈ以下であるので、ステップＳ１５に進む。 On the other hand, if it is determined in step S12 that the vehicle is not decelerating fuel cut, the process proceeds to step S14. In step S14, it is determined whether or not the integrated value of the charging / discharging current I of the battery 4 after starting the vehicle is equal to or greater than minus Ch (−Ch) when the discharge allowable electric quantity is Ch. The charging / discharging current I of the battery 4 is a current value detected by the battery sensor 7, and the current at the time of charging is detected as positive and the current at the time of discharging is detected as negative. Briefly, here, the balance between the amount of charge of the battery 4 due to the regenerative power generation of the alternator 2 at the time of deceleration fuel cut and the discharge amount of the battery 4 is obtained, and the discharge amount of the battery 4 after the balance calculation is calculated. It is determined whether or not the discharge allowable electric quantity Ch is equal to or larger. If it is determined that the integrated value of the charge / discharge current I of the battery 4 is equal to or greater than minus Ch, the discharge amount of the battery 4 is equal to or less than the discharge allowable electricity amount Ch, and the process proceeds to step S15.
　ステップＳ１５では、収支演算後のバッテリ４の放電量が放電許容電気量Ｃｈとなるまでの範囲で、バッテリ４から電装部品への放電を許可する。バッテリ４から電装部品への放電を許可することによって、オルタネータ２の発電を行う必要がなくなるので、オルタネータ２の駆動のために使用されるエンジン燃料を削減することができ、燃費を向上することができる。 In step S15, the discharge from the battery 4 to the electrical component is permitted until the discharge amount of the battery 4 after the balance calculation reaches the discharge allowable electricity amount Ch. By permitting the discharge from the battery 4 to the electrical component, it is not necessary to generate the power of the alternator 2, so that the engine fuel used for driving the alternator 2 can be reduced and the fuel efficiency can be improved. it can.
　一方、ステップＳ１４において、車両起動後のバッテリ４の充放電電流Ｉの積算値がマイナスＣｈ未満であると判定すると、ステップＳ１６に進む。ステップＳ１６では、所定電圧（例えば、１３Ｖ）でオルタネータ２の発電を行って、電装部品に電力を供給する。これにより、バッテリ４のＳＯＣは増減せずに維持される。 On the other hand, if it is determined in step S14 that the integrated value of the charge / discharge current I of the battery 4 after the vehicle is started is less than minus Ch, the process proceeds to step S16. In step S16, the alternator 2 generates power at a predetermined voltage (for example, 13V) to supply power to the electrical components. Thereby, the SOC of the battery 4 is maintained without increasing or decreasing.
　ステップＳ１７では、イグニッションスイッチ１５がオフであるか否かを判定する。イグニッションスイッチ１５がオフではないと判定すると、ステップＳ１２に戻り、オフであると判定すると、ステップＳ１８に進む。 In step S17, it is determined whether or not the ignition switch 15 is off. If it is determined that the ignition switch 15 is not off, the process returns to step S12. If it is determined that the ignition switch 15 is off, the process proceeds to step S18.
　ステップＳ１８では、今回の車両起動時から車両起動停止までの間における放電電気量Ｃｂｔを計算する。これは、今回の車両起動時から車両起動停止までの間における放電電気量から、充電電気量を差し引いた値であって、バッテリ４の充放電電流Ｉを積算することによって求めることができる。この放電電気量Ｃｂｔは、次回の車両起動後に行われる制御で用いられる（ステップＳ１１）。 In step S18, the amount of electric discharge Cbt from the current vehicle start to the vehicle start / stop is calculated. This is a value obtained by subtracting the amount of charged electricity from the amount of discharged electricity from the time when the vehicle is started to the time when the vehicle is started and stopped, and can be obtained by integrating the charge / discharge current I of the battery 4. This amount of discharged electricity Cbt is used in the control performed after the next vehicle activation (step S11).
　ステップＳ１０でバッテリ４の出力電圧ＶＢminが第２の出力電圧閾値ＶＢhigh未満であると判定すると、ステップＳ１９に進む。ステップＳ１９～ステップＳ２４の処理は、バッテリ出力が中程度の領域の時に行われる処理である。 If it is determined in step S10 that the output voltage VBmin of the battery 4 is less than the second output voltage threshold VBhigh, the process proceeds to step S19. The processes in steps S19 to S24 are performed when the battery output is in an intermediate region.
　ステップＳ１９では、車両が減速燃料カット中であるか否かを判定する。車両が減速燃料カット中であると判定すると、ステップＳ２０に進む。ステップＳ２０では、オルタネータ２の回生発電電力によってバッテリ４の充電を行う。 In step S19, it is determined whether or not the vehicle is decelerating fuel cut. If it is determined that the vehicle is decelerating fuel cut, the process proceeds to step S20. In step S <b> 20, the battery 4 is charged with the regenerative power generated by the alternator 2.
　ステップＳ１９で車両が減速燃料カット中ではないと判定すると、ステップＳ２１に進む。ステップＳ２１では、バッテリ４の充放電電流Ｉの積算値が０以上であるか否かを判定する。すなわち、減速燃料カット時におけるオルタネータ２の回生発電によってバッテリ４が充電された量と、バッテリ４が放電した量との収支を求めて、収支演算後のバッテリ４の充放電量がプラス（充電側がプラス）であるか否かを判定する。バッテリ４の充放電電流Ｉの積算値が０以上であると判定すると、ステップＳ２２に進む。 If it is determined in step S19 that the vehicle is not decelerating fuel cut, the process proceeds to step S21. In step S21, it is determined whether or not the integrated value of the charge / discharge current I of the battery 4 is 0 or more. That is, the balance between the amount that the battery 4 is charged by the regenerative power generation of the alternator 2 at the time of deceleration fuel cut and the amount that the battery 4 is discharged is obtained, and the charge / discharge amount of the battery 4 after the balance calculation is positive (the charge side is It is determined whether it is positive. If it determines with the integrated value of the charging / discharging electric current I of the battery 4 being 0 or more, it will progress to step S22.
　ステップＳ２２では、収支演算後のプラスの充電電気量だけ、バッテリ４から電装部品への放電を許可する。これにより、オルタネータ２の発電を行う必要がなくなるので、オルタネータ２の駆動のために使用されるエンジン燃料を削減することができ、燃費を向上することができる。 In step S22, discharging from the battery 4 to the electrical component is permitted by the positive charge electricity amount after the balance calculation. This eliminates the need for power generation of the alternator 2, thereby reducing the engine fuel used for driving the alternator 2 and improving the fuel efficiency.
　ステップＳ２１でバッテリ４の充放電電流Ｉの積算値が０未満であると判定すると、ステップＳ２３に進む。ステップＳ２３では、所定電圧（例えば、１３Ｖ）でオルタネータ２の発電を行って、電装部品に電力を供給する。これにより、バッテリ４のＳＯＣは増減せずに維持される。 If it determines with the integrated value of the charging / discharging current I of the battery 4 being less than 0 by step S21, it will progress to step S23. In step S23, the alternator 2 generates power at a predetermined voltage (for example, 13V) to supply power to the electrical components. Thereby, the SOC of the battery 4 is maintained without increasing or decreasing.
　ステップＳ２４では、イグニッションスイッチ１５がオフであるか否かを判定する。イグニッションスイッチ１５がオフではないと判定すると、ステップＳ１９に戻り、オフであると判定すると、フローチャートの処理を抜ける。 In step S24, it is determined whether or not the ignition switch 15 is off. If it is determined that the ignition switch 15 is not off, the process returns to step S19. If it is determined that the ignition switch 15 is off, the process of the flowchart is exited.
　上述した説明では、バッテリ出力が低い領域では、バッテリ４が満充電になるまで、バッテリ４の充電を行うものとしたが、バッテリ出力が少なくとも高い領域まで充電を行うようにしてもよい。この場合も、出力が低い領域でバッテリ４を使う頻度を低減することができる。 In the above description, in the region where the battery output is low, the battery 4 is charged until the battery 4 is fully charged. However, the battery output may be performed until the battery output is at least high. Also in this case, the frequency of using the battery 4 in a region where the output is low can be reduced.
　以上、一実施の形態におけるバッテリの充放電制御装置によれば、バッテリ４の出力が第１の所定出力以下である場合、バッテリ４の出力が第２の所定出力以上となるようにバッテリ４の充電を行い、充電の途中でバッテリの充放電制御装置の動作を停止した場合には、次回の動作開始後もバッテリ４の出力が第２の所定出力以上となるようにバッテリ４の充電を行う。これにより、バッテリ４の出力が第１の所定出力以下である低い領域であると判定された場合には、バッテリ４の出力が第２の所定出力以上となるまでバッテリ４の充電を行うことができる。また、充電の途中でバッテリの充放電制御装置の動作を停止した場合であって、次回の動作開始後にバッテリ４の出力が第１の所定出力より高く、かつ、第２の所定出力未満である場合でも、バッテリ４の出力が第２の所定出力以上となるまでバッテリ４の充電を行うので、出力が低い領域でバッテリ４が使われる頻度を低減することができる。これにより、バッテリ４の劣化促進を抑制して、バッテリ４の寿命を延ばすことができる。 As described above, according to the battery charge / discharge control device in the embodiment, when the output of the battery 4 is equal to or lower than the first predetermined output, the output of the battery 4 is set to be equal to or higher than the second predetermined output. When charging is performed and the operation of the battery charge / discharge control device is stopped in the middle of charging, the battery 4 is charged so that the output of the battery 4 is equal to or higher than the second predetermined output even after the start of the next operation. . Accordingly, when it is determined that the output of the battery 4 is a low region that is equal to or lower than the first predetermined output, the battery 4 is charged until the output of the battery 4 becomes equal to or higher than the second predetermined output. it can. Moreover, it is a case where operation | movement of the charging / discharging control apparatus of a battery is stopped in the middle of charge, Comprising: After the next operation start, the output of the battery 4 is higher than a 1st predetermined output, and is less than a 2nd predetermined output. Even in such a case, since the battery 4 is charged until the output of the battery 4 becomes equal to or higher than the second predetermined output, the frequency with which the battery 4 is used in a region where the output is low can be reduced. Thereby, deterioration promotion of the battery 4 can be suppressed and the life of the battery 4 can be extended.
　特に、一実施の形態におけるバッテリの充放電制御装置では、バッテリの出力が第１の所定出力以下である場合、バッテリ４の充電電流が所定の電流Ｉfull以下となるまでバッテリ４の充電を行い、充電の途中でバッテリ４の充放電制御装置の動作を停止した場合には、次回の動作開始後もバッテリの充電電流が所定の電流Ｉfull以下となるまでバッテリ４の充電を行う。所定の電流Ｉfullは、バッテリ４の満充電時の充電電流に対応するため、バッテリの出力が第１の所定出力以下である場合には、劣化の影響が小さい満充電状態となるまでバッテリ４の充電を行うことができ、出力が低い領域でバッテリ４が使われる頻度をより低減することができる。 In particular, in the battery charge / discharge control device according to the embodiment, when the output of the battery is equal to or lower than the first predetermined output, the battery 4 is charged until the charging current of the battery 4 becomes equal to or lower than the predetermined current Ifull, When the operation of the charging / discharging control device for the battery 4 is stopped during the charging, the battery 4 is charged until the charging current of the battery becomes equal to or lower than a predetermined current Ifull even after the next operation starts. Since the predetermined current Ifull corresponds to the charging current when the battery 4 is fully charged, when the output of the battery is equal to or lower than the first predetermined output, the battery 4 is fully charged until the influence of deterioration is small. Charging can be performed, and the frequency with which the battery 4 is used in a region where the output is low can be further reduced.
　バッテリ４の出力が第２の所定出力以上である場合、バッテリの充放電制御装置の前回動作時の充放電の収支が放電であれば、その放電量を充電するためにバッテリ４の充電を行う。これにより、前回動作時の放電量を今回の動作時の充電によって補うことができるので、バッテリ出力を高い領域で維持することができ、出力が低い領域でバッテリ４が使われる頻度を低減することができる。 When the output of the battery 4 is equal to or higher than the second predetermined output, if the balance of charge / discharge at the previous operation of the battery charge / discharge control device is discharge, the battery 4 is charged to charge the amount of discharge. . As a result, the amount of discharge during the previous operation can be supplemented by charging during the current operation, so that the battery output can be maintained in a high region, and the frequency with which the battery 4 is used in a region where the output is low is reduced. Can do.
　本発明は、上述した一実施の形態に限定されることはない。例えば、上述した説明では、バッテリの充放電制御装置を車両に適用した例について説明したが、車両以外のものにも適用することができる。 The present invention is not limited to the above-described embodiment. For example, in the above description, an example in which the battery charge / discharge control device is applied to a vehicle has been described.
　上述した説明では、バッテリ４の出力が高い領域、中程度の領域、低い領域の３つの領域に分けたが、出力領域の数が３に限定されることはない。 In the above description, the battery 4 is divided into three areas: a high output area, an intermediate area, and a low output area, but the number of output areas is not limited to three.
　バッテリ４の充電電流Ｉが満充電判定電流閾値Ｉfull以下になると、バッテリ４が満充電まで充電されたと判定するものとして説明したが、バッテリ４が満充電状態となったか否かの判定方法は、この方法に限定されることはない。 Although it has been described that the battery 4 is determined to be fully charged when the charging current I of the battery 4 is equal to or less than the full charge determination current threshold Ifull, a method for determining whether or not the battery 4 is fully charged is as follows. It is not limited to this method.
　バッテリ４の充電は、オルタネータ４の発電により行うものとしたが、オルタネータ４以外の発電機を用いることもできる。 Although charging of the battery 4 is performed by power generation of the alternator 4, a generator other than the alternator 4 may be used.
　本願は、２０１３年７月３日に日本国特許庁に出願された特願２０１３－１３９９１６に基づく優先権を主張し、この出願の全ての内容は参照により本明細書に組み込まれる。 This application claims priority based on Japanese Patent Application No. 2013-139916 filed with the Japan Patent Office on July 3, 2013, the entire contents of which are incorporated herein by reference.

Claims (5)

  1. 　バッテリの充放電を制御するバッテリの充放電制御装置であって、
    　前記バッテリの出力が第１の所定出力以下であるか否かを判定するバッテリ出力領域判定手段と、
    　前記バッテリの出力が前記第１の所定出力以下である場合、前記バッテリの出力が、前記第１の所定出力より高い値である第２の所定出力以上となるように前記バッテリの充電を行い、充電の途中で前記バッテリの充放電制御装置の動作を停止した場合には、次回の動作開始後も前記バッテリの出力が前記第２の所定出力以上となるように前記バッテリの充電を行う充電制御手段と、
    を備えるバッテリの充放電制御装置。     A battery charge / discharge control device for controlling charge / discharge of a battery,
    Battery output region determination means for determining whether the output of the battery is equal to or lower than a first predetermined output;
    When the output of the battery is equal to or lower than the first predetermined output, the battery is charged such that the output of the battery is equal to or higher than a second predetermined output that is higher than the first predetermined output; Charge control for charging the battery so that the output of the battery becomes equal to or higher than the second predetermined output even after the start of the next operation when the operation of the charge / discharge control device for the battery is stopped in the middle of charging. Means,
    A battery charge / discharge control apparatus comprising:
  2. 　請求項１に記載のバッテリの充放電制御装置において、
    　前記バッテリの充電電流を検出する充電電流検出手段をさらに備え、
    　前記充電制御手段は、前記バッテリの出力が前記第１の所定出力以下である場合、前記バッテリの充電電流が所定の電流以下となるまで前記バッテリの充電を行い、充電の途中で前記バッテリの充放電制御装置の動作を停止した場合には、次回の動作開始後も前記バッテリの充電電流が前記所定の電流以下となるまで前記バッテリの充電を行うバッテリの充放電制御装置。     The battery charge / discharge control device according to claim 1,
    The battery further comprises a charging current detecting means for detecting a charging current of the battery,
    When the output of the battery is less than or equal to the first predetermined output, the charge control means charges the battery until the charge current of the battery becomes less than or equal to a predetermined current, and charges the battery during the charge. When the operation of the discharge control device is stopped, the battery charge / discharge control device charges the battery until the charge current of the battery becomes equal to or lower than the predetermined current even after the next operation start.
  3. 　請求項２に記載のバッテリの充放電制御装置において、
    　前記所定の電流は、前記バッテリの満充電時の充電電流に対応するバッテリの充放電制御装置。     The battery charge / discharge control device according to claim 2,
    The predetermined current is a battery charge / discharge control device corresponding to a charge current when the battery is fully charged.
  4. 　請求項１から請求項３のいずれか一項に記載のバッテリの充放電制御装置において、
    　前記バッテリ出力領域判定手段は、前記バッテリの出力が前記第２の所定出力以上であるか否かを判定し、
    　前記充電制御手段は、前記バッテリの出力が前記第２の所定出力以上である場合、前記バッテリの充放電制御装置の前回動作時の充放電の収支が放電であれば、その放電量を充電するために前記バッテリの充電を行うバッテリの充放電制御装置。     In the charging / discharging control apparatus of the battery as described in any one of Claims 1-3,
    The battery output area determination means determines whether the output of the battery is equal to or higher than the second predetermined output,
    If the output of the battery is equal to or higher than the second predetermined output, the charge control means charges the amount of discharge if the balance of charge / discharge during the previous operation of the charge / discharge control device of the battery is discharge. A battery charge / discharge control device for charging the battery for the purpose.
  5. 　バッテリの充放電を制御するバッテリの充放電制御方法であって、
    　前記バッテリの出力が第１の所定出力以下であるか否かを判定し、
    　前記バッテリの出力が前記第１の所定出力以下である場合、前記バッテリの出力が、前記第１の所定出力より高い値である第２の所定出力以上となるように前記バッテリの充電を行い、充電の途中で前記バッテリの充放電制御装置の動作を停止した場合には、次回の動作開始後も前記バッテリの出力が前記第２の所定出力以上となるように前記バッテリの充電を行う、
    バッテリの充放電制御方法。     A charge / discharge control method for a battery for controlling charge / discharge of the battery,
    Determining whether the output of the battery is below a first predetermined output;
    When the output of the battery is equal to or lower than the first predetermined output, the battery is charged such that the output of the battery is equal to or higher than a second predetermined output that is higher than the first predetermined output; When the operation of the battery charge / discharge control device is stopped in the middle of charging, the battery is charged so that the output of the battery becomes equal to or higher than the second predetermined output even after the next operation start.
    Battery charge / discharge control method.
PCT/JP2014/063473 2013-07-03 2014-05-21 Battery charging/discharging control device and battery charging/discharging control method WO2015001861A1 (en)

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JP2013-139916 2013-07-03

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JP2004120857A (en) * 2002-09-25 2004-04-15 Matsushita Electric Ind Co Ltd Power supply
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