WO2017164023A1 - Circuit de commande de charge - Google Patents

Circuit de commande de charge Download PDF

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Publication number
WO2017164023A1
WO2017164023A1 PCT/JP2017/010309 JP2017010309W WO2017164023A1 WO 2017164023 A1 WO2017164023 A1 WO 2017164023A1 JP 2017010309 W JP2017010309 W JP 2017010309W WO 2017164023 A1 WO2017164023 A1 WO 2017164023A1
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WO
WIPO (PCT)
Prior art keywords
potential
signal
power supply
voltage
supply line
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Application number
PCT/JP2017/010309
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English (en)
Japanese (ja)
Inventor
羽田　正二
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Ntn株式会社
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Filing date
Publication date
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2017164023A1 publication Critical patent/WO2017164023A1/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a charge control circuit for controlling charging of a rechargeable battery (battery).
  • trickle charging is for charging a rechargeable battery with a smaller charging current than that for rapid charging.
  • Trickle charging reduces the amount of current supplied to the rechargeable battery, or charges a pulse current that has a constant ratio between the current supply period and the current supply pause period, and the current value during the current supply period is constant. The average amount of current is reduced by setting the current.
  • Patent Document 1 discloses a charging circuit that performs trickle charging.
  • the amount of spontaneous discharge of the rechargeable battery varies depending on the remaining capacity of the rechargeable battery.
  • the amount of spontaneous discharge is greatest when the rechargeable battery is fully charged, and gradually decreases as the remaining amount decreases. Therefore, the charging circuit described in Patent Document 1 performs trickle charging with a current that is smaller than the amount of spontaneous discharge in the fully charged state of the rechargeable battery and larger than the amount of spontaneous discharge that is the smallest in the rechargeable battery.
  • the charging circuit described in Patent Document 1 measures the temperature when the rechargeable battery is used, and performs trickle charging with a charging current corresponding to the temperature.
  • An object of the present invention is to provide a charge control circuit capable of trickle charging with simple control.
  • the charge control circuit of the present invention comprises: A charge control circuit for controlling a charging current for charging a rechargeable battery, A first power line connected to one terminal of the rechargeable battery and applied with a first potential; A second power supply line to which a second potential is applied; An intermediate line connected to the other terminal of the rechargeable battery and having an intermediate potential by the rechargeable battery; When a voltage that is a potential difference between the first potential of the first power supply line and the intermediate potential of the intermediate line rises and reaches a predetermined upper limit voltage during the output of the charging signal, the charging signal is changed to a cutoff signal.
  • a controller for switching to the charging signal It is disposed between the intermediate line and the second power supply line, and flows the charging current when the charging signal is input, and stops the charging current when the cutoff signal is input.
  • the upper limit voltage is higher by a predetermined voltage than the full charge voltage output from the rechargeable battery when the rechargeable battery is in a fully charged state
  • the lower limit voltage is lower than the full charge voltage by a predetermined voltage, It is characterized by that.
  • the charge control circuit according to the present invention includes: A third power line;
  • the third power supply line is operated by a first potential supplied from the first power supply line and an intermediate potential supplied from the intermediate line, and a third potential having a constant potential difference from the intermediate potential is set to the third power supply line.
  • a constant voltage generator to output to With The control unit is A comparison potential generator connected to the first power supply line and the intermediate line, generating a comparison potential based on the first potential and the intermediate potential, and outputting the comparison potential;
  • a reference potential generator connected to the third power line and the intermediate line, generating a reference potential based on the third potential and the intermediate potential, and outputting the reference potential; It operates with the third potential supplied from the third power supply line and the intermediate potential supplied from the intermediate line, and has a level corresponding to the charge signal based on the comparison between the comparison potential and the reference potential.
  • a comparator that outputs a potential or a potential at a level corresponding to the cutoff signal; One end and the other end are connected to the output terminal and the non-inverting input terminal of the comparator, respectively, and a hysteresis is given to a potential at a level corresponding to the charge signal output from the comparator and a potential at a level corresponding to the cutoff signal.
  • a resistor for hysteresis, Comprising It is characterized by that.
  • the charge control circuit includes:
  • the switch part is A potential converter that outputs a charging potential when a potential at a level corresponding to the charging signal is input, and outputs a blocking potential when a potential at a level corresponding to the blocking signal is input;
  • a resistor having one end connected to the intermediate line; One end of a current path is connected to the second power supply line, the other end of the current path is connected to the other end of the resistor, a control end is connected to an output end of the potential converter, and the control end
  • a semiconductor element that conducts the current path when the charging potential is input to the semiconductor device and interrupts the current path when the cutoff potential is input to the control terminal; Comprising It is characterized by that.
  • the charge control circuit according to the present invention includes: A first potential applied to the first power supply line is higher than a second potential applied to the second power supply line;
  • the semiconductor element is an NMOS transistor;
  • the reference potential and the comparison potential are input to the non-inverting input terminal and the inverting input terminal of the comparator, respectively. It is characterized by that.
  • trickle charging can be performed with simple control.
  • FIG. 2A shows an example of a change in voltage of the rechargeable battery.
  • FIG. 2B shows an example of change in current of the rechargeable battery.
  • FIG. 1 shows an example of the configuration of a charge control circuit 10 according to an embodiment of the present invention.
  • the charging control circuit 10 causes the charging current to flow to or stops from the rechargeable battery BAT.
  • the charging control circuit 10 includes a power supply line L1 that is a first power supply line, a power supply line L2 that is a second power supply line, a power supply line L3 that is a third power supply line, an intermediate line Lm, and a smoothing capacitor.
  • C constant voltage generation unit 20, control unit 30, and switch unit 40.
  • the power line L1 is connected to the terminals T1 and T3.
  • the power supply line L2 is connected to the terminal T2.
  • the intermediate line Lm is connected to the terminal T4.
  • An external DC power supply is connected to the terminals T1 and T2.
  • a potential V1 which is a first potential, is applied to the terminal T1.
  • the potential V1 and the potential V2 are, for example, 380V and 0V, respectively.
  • the potential V1 and the potential V2 may be, for example, 190V and -190V, respectively.
  • the potential V1 and the potential V2 may be 30 V and 0 V, respectively, for example.
  • One terminal (for example, a plus terminal) and the other terminal (for example, a minus terminal) of the rechargeable battery BAT are connected to the terminals T3 and T4, respectively.
  • the charge control circuit 10 can charge the rechargeable battery BAT having a full charge voltage of 300 V, for example.
  • the charge control circuit 10 can charge the rechargeable battery BAT having a full charge voltage of 24V, for example.
  • the full charge voltage means a voltage output from the rechargeable battery BAT when the rechargeable battery BAT is in a fully charged state.
  • the potential of the intermediate line Lm becomes an intermediate potential Vm that is lower than the potential V1 of the power supply line L1 by the voltage output from the rechargeable battery BAT.
  • the constant voltage generator 20 operates by a voltage (potential difference between the potential V1 and the intermediate potential Vm) supplied from the power supply line L1 and the intermediate line Lm, and outputs a potential V3 that is a third potential to the power supply line L3.
  • the output of the constant voltage generator 20, that is, the potential difference between the potential V3 and the intermediate potential Vm is constant and stable.
  • the potential difference between the potential V3 and the intermediate potential Vm is 20V. Since the configuration of the constant voltage generation unit 20 is well known and outside the scope of the present invention, the description thereof is omitted.
  • the control unit 30 outputs a charge signal and a cutoff signal.
  • a switch section 40 is disposed between the intermediate line Lm and the power supply line L2. The switch unit 40 allows a charging current to flow when a charging signal is input, and stops the charging current when a cutoff signal is input.
  • the rechargeable battery BAT is charged when the charging current is flowing, and the rechargeable battery BAT is spontaneously discharged when the charging current is not flowing.
  • FIG. 2 shows an example of changes in the voltage and charging current of the rechargeable battery BAT.
  • the potential difference between the potential V1 of the power supply line L1 and the intermediate potential Vm of the intermediate line Lm is a voltage (hereinafter referred to as a rechargeable battery BAT) between one terminal (for example, a positive terminal) and the other terminal (for example, a negative terminal) of the rechargeable battery BAT. Is called the voltage.).
  • a rechargeable battery BAT a voltage between one terminal (for example, a positive terminal) and the other terminal (for example, a negative terminal) of the rechargeable battery BAT. Is called the voltage.).
  • the control unit 30 switches from the charge signal to the cutoff signal.
  • the control unit 30 switches from the cutoff signal to the charge signal.
  • the rechargeable battery BAT when the rechargeable battery BAT is in a fully charged state, it outputs a fully charged voltage.
  • the upper limit voltage is set higher than the full charge voltage by a predetermined voltage
  • the lower limit voltage is set lower than the full charge voltage by a predetermined voltage.
  • the upper limit voltage is 2.25 V per cell
  • the lower limit voltage is 2.20 V per cell.
  • the upper limit voltage may be set lower than the full charge voltage.
  • the switch unit 40 allows a charging current to flow when a charging signal is input.
  • the rechargeable battery BAT is charged by this charging current.
  • the switch unit 40 generates a voltage corresponding to the potential difference between the intermediate potential Vm of the intermediate line and the potential V2 of the power supply line L2.
  • the switch unit 40 electrically disconnects the intermediate line Lm and the power supply line L2 and stops the charging current when the cutoff signal is input.
  • the rechargeable battery BAT is spontaneously discharged.
  • the control unit 30 includes a comparison potential generation unit 31, a reference potential generation unit 32, a comparator 33, and a hysteresis resistor R34.
  • the comparison potential generator 31 is connected to the power supply line L1 and the intermediate line Lm.
  • the comparison potential generation unit 31 includes a resistor R30 and a resistor R31.
  • the resistor R30 has one end connected to the intermediate line Lm and the other end connected to one end of the resistor R31. The other end of the resistor R31 is connected to the power supply line L1.
  • the comparison potential generator 31 divides the potential difference (voltage) between the potential V1 and the intermediate potential Vm by the resistor R30 and the resistor R31, and compares them in the range of the potential difference between the potential V3 and the intermediate potential Vm (for example, a range of 0V to 20V). Generate a potential and output it.
  • the reference potential generation unit 32 is connected to the power supply line L3 and the intermediate line Lm.
  • the reference potential generation unit 32 includes a resistor R32 and a resistor R33.
  • the resistor R32 has one end connected to the intermediate line Lm and the other end connected to one end of the resistor R33.
  • the other end of the resistor R33 is connected to the power supply line L3.
  • the reference potential generation unit 32 divides the potential difference between the potential V3 and the intermediate potential Vm by the resistors R32 and R33, generates a reference potential, and outputs it.
  • the output of the reference potential generator 32 that is, the potential difference between the reference potential and the intermediate potential Vm is constant and stable.
  • the comparator 33 operates by a voltage (potential difference between the potential V3 and the intermediate potential Vm, for example, 20 V) supplied from the power supply line V3 and the intermediate line Lm.
  • a comparison potential that is an output of the comparison potential generation unit 31 is input to the inverting input terminal of the comparator 33.
  • a reference potential that is an output of the reference potential generation unit 32 is input to the non-inverting input terminal of the comparator 33.
  • One terminal and the other terminal of the hysteresis resistor R34 are connected to the output terminal and the non-inverting input terminal of the comparator 33, respectively.
  • the comparator 33 outputs a potential at a level corresponding to the charge signal or a potential at a level corresponding to the cutoff signal based on the comparison between the comparison potential and the reference potential.
  • the hysteresis resistor R34 imparts hysteresis to these potentials.
  • the comparator 33 gradually increases the comparison potential that is lower than the reference potential and increases by a predetermined potential from the reference potential (that is, the rechargeable battery voltage gradually increases and reaches the upper limit potential).
  • the output is changed from a potential at a level corresponding to the charge signal to a potential at a level corresponding to the cutoff signal.
  • the comparator 33 gradually decreases the comparison potential that is higher than the reference potential, and lowers by a predetermined potential from the reference potential (that is, the rechargeable battery voltage gradually decreases and reaches the lower limit potential).
  • the output is changed from a potential at a level corresponding to the cutoff signal to a potential at a level corresponding to the charge signal.
  • the switch unit 40 includes a potential conversion unit 41, an NMOS transistor 42, and a resistor R40.
  • the potential converter 41 outputs a charging potential when a potential at a level corresponding to the charging signal is input, and outputs a blocking potential when a potential at a level corresponding to the blocking signal is input.
  • the potential conversion unit 41 includes a PNP transistor Q40, a resistor R41, a resistor R42, a resistor R43, and a Zener diode Z40.
  • the PNP transistor Q40 is turned on when the comparator 33 outputs a potential at a level corresponding to the charge signal, and the output of the potential converter 41 is set to the charge potential.
  • the resistors R41 and R42 limit the current flowing from the emitter to the collector of the PNP transistor Q40.
  • the Zener diode Z40 prevents an overvoltage from being applied to the gate of the NMOS transistor 42.
  • the PNP transistor Q40 is turned off when the comparator 33 outputs a potential at a level corresponding to the cutoff signal.
  • the resistor R43 clamps the output of the potential converter 41 to the potential V2 of the power supply line L2, and sets the output of the potential converter 41 to a cut-off potential.
  • the resistor R40 has one end connected to the intermediate line Lm and the other end connected to the drain of the NMOS transistor 42.
  • the NMOS transistor 42 has a source connected to the power supply line L ⁇ b> 2 and a gate connected to the output terminal of the potential converter 41.
  • the NMOS transistor 42 conducts a current path between the source and the drain when a charging potential is input to the gate. At this time, a charging current flows through the rechargeable battery BAT, and the rechargeable battery BAT is charged.
  • the resistor R40 suppresses the inrush current when the charging current starts to flow.
  • the resistor R40 and the resistance between the source and drain of the NMOS transistor 42 generate a voltage corresponding to the potential difference between the intermediate potential Vm of the intermediate line Lm and the potential V2 of the power supply line L2 when a charging current flows.
  • the NMOS transistor 42 cuts off the current path between the source and drain when a cut-off potential is input to the gate, and electrically disconnects the power supply line L2 and the intermediate line Lm.
  • the NMOS transistor 42, the resistor R40, and the intermediate line Lm are connected to the power supply line L2
  • the power supply line L2 is the first power supply line of the present invention
  • the power supply line L1 is the second power supply line of the present invention.
  • control unit 30 is configured by the comparator 33 and a plurality of resistors.
  • the potential difference between the potential V1 of the power supply line L1 and the intermediate potential Vm of the intermediate line Lm (the voltage of the rechargeable battery BAT). ) Can be converted into a digital signal by A / D conversion, and the control unit 30 can be realized by a DSP (Digital Signal Processor) and its control program.
  • DSP Digital Signal Processor
  • trickle charging can be performed with simple control.
  • the rechargeable battery BAT since the voltage of the rechargeable battery BAT is always between the lower limit voltage and the upper limit voltage, the rechargeable battery BAT will not be overcharged or insufficiently charged.
  • it is not necessary to measure the current supply period and the current supply suspension period.
  • a period in which the rechargeable battery BAT is charged and its voltage rises from the lower limit voltage to the upper limit voltage is a current supply period
  • a period in which the rechargeable battery BAT spontaneously discharges and its voltage falls from the upper limit voltage to the lower limit voltage is a current stop period.
  • the present invention it is not necessary to set the average current value for trickle charging according to the temperature when the rechargeable battery is used. Furthermore, according to the present invention, the voltage of the rechargeable battery BAT does not drop below the lower limit voltage. For this reason, even if the current value necessary for trickle charging changes due to secular change or the like, a state where rapid charging is required is not reached.
  • SYMBOLS 10 Charge control circuit, 20 ... Constant voltage production

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

Abstract

[Problème] Réaliser une charge d'entretien avec une commande simple. [Solution] Une unité de commande 30 émet un signal de charge et un signal de coupure. Une unité de commutation 40 est disposée entre une ligne intermédiaire LM et une ligne de source d'alimentation L2. L'unité de commutation 40 fait passer un courant de charge lorsque le signal de charge est entré, et arrête le courant de charge lorsque le signal de coupure est entré. Lorsqu'un courant de charge circule, une batterie de charge BAT est chargée, et lorsqu'aucun courant de charge ne circule, la batterie de charge BAT se décharge spontanément. Lorsque, pendant la sortie du signal de charge, la tension de la batterie de charge BAT augmente et atteint une tension limite supérieure spécifiée, l'unité de commande 30 commute du signal de charge au signal de coupure. Pendant ce temps, lorsque, pendant la sortie du signal de coupure, la tension de la batterie de charge BAT tombe et atteint une tension limite inférieure spécifiée, l'unité de commande 30 commute du signal de coupure au signal de charge. Lorsque le courant de charge circule, l'unité de commutation 40 génère une tension correspondant à la différence de potentiel entre le potentiel intermédiaire Vm de la ligne intermédiaire et le potentiel V2 de la ligne de source d'alimentation L2.
PCT/JP2017/010309 2016-03-22 2017-03-15 Circuit de commande de charge WO2017164023A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016056447A JP6675243B2 (ja) 2016-03-22 2016-03-22 充電制御回路
JP2016-056447 2016-03-22

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WO2017164023A1 true WO2017164023A1 (fr) 2017-09-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112106272A (zh) * 2018-06-01 2020-12-18 德州仪器公司 电池充电器
CN113824171A (zh) * 2020-06-18 2021-12-21 Fdk株式会社 充电电池的充电装置
WO2022049455A1 (fr) * 2020-09-07 2022-03-10 株式会社半導体エネルギー研究所 Circuit de commande de batterie rechargeable et dispositif électronique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230336006A1 (en) 2020-09-22 2023-10-19 Semiconductor Energy Laboratory Co., Ltd. Control Circuit And Electronic Device

Citations (3)

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Publication number Priority date Publication date Assignee Title
JP2008228492A (ja) * 2007-03-14 2008-09-25 Sanyo Electric Co Ltd リチウムイオン二次電池の充電方法
JP2009043554A (ja) * 2007-08-08 2009-02-26 Panasonic Corp 電池パック、充電装置、及び充電システム
JP2009106147A (ja) * 2007-10-05 2009-05-14 Panasonic Corp 二次電池の充電制御方法、及び充電制御回路

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008228492A (ja) * 2007-03-14 2008-09-25 Sanyo Electric Co Ltd リチウムイオン二次電池の充電方法
JP2009043554A (ja) * 2007-08-08 2009-02-26 Panasonic Corp 電池パック、充電装置、及び充電システム
JP2009106147A (ja) * 2007-10-05 2009-05-14 Panasonic Corp 二次電池の充電制御方法、及び充電制御回路

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112106272A (zh) * 2018-06-01 2020-12-18 德州仪器公司 电池充电器
US11996714B2 (en) 2018-06-01 2024-05-28 Texas Instruments Incorporated Battery charger
CN112106272B (zh) * 2018-06-01 2024-06-04 德州仪器公司 电池充电器及用于对电池充电的系统和方法
CN113824171A (zh) * 2020-06-18 2021-12-21 Fdk株式会社 充电电池的充电装置
CN113824171B (zh) * 2020-06-18 2023-08-15 Fdk株式会社 充电电池的充电装置
WO2022049455A1 (fr) * 2020-09-07 2022-03-10 株式会社半導体エネルギー研究所 Circuit de commande de batterie rechargeable et dispositif électronique

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JP2017175688A (ja) 2017-09-28

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