WO2010103816A1 - Circuit de commande de charge/décharge, dispositif d'alimentation et procédé de commande d'un dispositif d'alimentation - Google Patents

Circuit de commande de charge/décharge, dispositif d'alimentation et procédé de commande d'un dispositif d'alimentation Download PDF

Info

Publication number
WO2010103816A1
WO2010103816A1 PCT/JP2010/001683 JP2010001683W WO2010103816A1 WO 2010103816 A1 WO2010103816 A1 WO 2010103816A1 JP 2010001683 W JP2010001683 W JP 2010001683W WO 2010103816 A1 WO2010103816 A1 WO 2010103816A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
battery
terminal voltage
related information
current limiting
Prior art date
Application number
PCT/JP2010/001683
Other languages
English (en)
Japanese (ja)
Inventor
小林憲令
Original Assignee
パナソニック株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パナソニック株式会社 filed Critical パナソニック株式会社
Publication of WO2010103816A1 publication Critical patent/WO2010103816A1/fr

Links

Images

Classifications

    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • 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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
    • 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
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H02J7/0014—Circuits for equalisation of charge between batteries
    • H02J7/0019—Circuits for equalisation of charge between batteries using switched or multiplexed charge circuits
    • 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
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • 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
    • 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]
    • G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302—Overcharge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • 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
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • 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
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates to a charge / discharge control circuit for controlling charge / discharge of a secondary battery, a power supply device using the same, and a control method for the power supply device.
  • power storage devices using secondary batteries have been widely used as power supply systems in combination with solar cells and power generation devices.
  • the power generation device is driven by natural energy such as wind power or hydraulic power or artificial power such as an internal combustion engine.
  • a power supply system that combines such power storage devices is designed to improve energy efficiency by storing surplus power in the power storage device and supplying power from the power storage device when a load device is required.
  • An example of such a system is a solar power generation system.
  • the solar power generation system charges the power storage device with surplus power when the amount of power generated by sunlight is larger than the power consumption of the load device.
  • the load device is driven by outputting from the power storage device in order to compensate for the insufficient power.
  • surplus power that has not been used in the past can be stored in the power storage device, so that energy efficiency can be improved compared to a power supply system that does not use the power storage device.
  • charge control is performed so that the state of charge of the secondary battery (hereinafter referred to as SOC: State Of Charge) does not become 100%.
  • SOC State Of Charge
  • charging control is performed so that the SOC does not become 0 (zero)% so that the load device can be driven when necessary.
  • charging control is normally performed so that the SOC changes within a range of 20% to 80%.
  • a hybrid vehicle using an engine and a motor also uses such a principle.
  • the HEV drives the generator with surplus engine output and charges the power storage device. Further, the HEV charges the power storage device by using the motor as a generator during braking or deceleration of the vehicle.
  • load leveling power sources used to effectively use nighttime power and plug-in hybrid vehicles have recently attracted attention.
  • the load leveling power supply is a system that stores power in the power storage device at night when power consumption is low and power charges are low, and uses the stored power during the day when power consumption peaks.
  • the purpose is to make the power generation amount constant by smoothing the power consumption, and to contribute to the efficient operation of power facilities and the reduction of capital investment.
  • Plug-in hybrid vehicles use electric power at night, mainly EV driving to supply power from the power storage device when driving in urban areas where fuel efficiency is poor, and by running HEV using an engine and motor during long distance driving, The aim is to reduce the total CO 2 emissions.
  • a power storage device mounted on a power supply device is configured by connecting a plurality of secondary batteries (single cells, etc.) in series or in parallel in order to obtain a predetermined output voltage and capacity.
  • a power storage device in which a plurality of secondary batteries are connected in parallel when abnormality or deterioration of the secondary battery is detected, it is necessary to disconnect the secondary battery in which the abnormality or deterioration has occurred from the power storage device.
  • Patent Document 1 before the secondary battery once disconnected is connected in parallel with another secondary battery again, it is connected to the other secondary battery via a current limiting resistor to thereby reduce the inrush current. While limiting, the terminal voltage difference with other secondary batteries is eliminated, and then the disconnected secondary battery is connected in parallel with other secondary batteries to reduce inrush current. .
  • An object of the present invention is to provide a current limiting resistor in order to reduce an inrush current that may occur when a secondary battery that has been once disconnected is connected in parallel again from a parallel circuit in which a plurality of secondary batteries are connected in parallel. It is providing the charging / discharging control circuit, power supply device, and control method of a power supply device which can reduce such inrush current, without using.
  • a charge / discharge control circuit includes a plurality of secondary batteries connected in parallel, a plurality of switching units each connected in series, a state detection unit that detects a state of each of the secondary batteries, When any of the states of the secondary batteries detected by the state detection unit satisfies a predetermined determination condition, the secondary battery that satisfies the determination condition is set as a current limit target battery, and the current limit target A current limiting unit that turns off a switching unit connected in series with the battery; a voltage-related information acquisition unit that acquires information about a terminal voltage of each secondary battery as voltage-related information from each of the secondary batteries; and the current limitation The terminal of the current limiting target battery, the state detected by the state detection unit for the target battery does not satisfy the determination condition and is acquired by the voltage related information acquisition unit First voltage-related information related to the first terminal voltage that is a voltage, and second voltage-related information related to a second terminal voltage that is a terminal voltage of a secondary battery other than the current limiting target battery,
  • a control method for a power supply device is a control method for a power supply device including a plurality of secondary batteries connected in parallel and a plurality of switching units each connected in series, the state detection unit
  • the step of detecting the state of each secondary battery and the current limiting unit satisfying a predetermined determination condition among any of the states of the secondary batteries detected by the state detection unit A secondary battery satisfying the determination condition as a current limiting target battery, turning off a switching unit connected in series with the current limiting target battery, and a voltage related information acquiring unit from each of the secondary batteries
  • a power supply device includes the above-described charge / discharge control circuit and the plurality of secondary batteries.
  • FIG. 1 is a block diagram showing an example of the configuration of a charge / discharge control circuit using a method for controlling a power supply apparatus according to an embodiment of the present invention and a power supply apparatus provided with this circuit.
  • 3 is a flowchart illustrating an example of an operation of the power supply device illustrated in FIG. 1.
  • 3 is a flowchart illustrating an example of an operation of the power supply device illustrated in FIG. 1.
  • It is a block diagram which shows another example of the charging / discharging control circuit shown in FIG. 1, and a power supply device provided with this circuit.
  • 5 is a flowchart showing an example of the operation of the power supply device shown in FIG.
  • FIG. 1 is a block diagram showing an example of the configuration of a charge / discharge control circuit using a method for controlling a power supply apparatus according to an embodiment of the present invention and a power supply apparatus provided with this circuit.
  • the power supply device 1 shown in FIG. 1 includes assembled batteries 2, 3, 4, voltage detection units 21, 31, 41 (state detection unit, voltage-related information acquisition unit), current detection units 22, 32, 42, temperature detection unit 23. , 33, 43, discharging switching elements 24, 34, 44, charging switching elements 25, 35, 45, a control unit 5, and connection terminals 6, 7 are provided. And the part remove
  • the power generation device 100 and the load device 200 are connected to the connection terminals 6 and 7. Then, surplus power generated by the power generation device 100 is charged to the assembled batteries 2, 3, 4 via the connection terminals 6, 7, or from the assembled batteries 2, 3, 4 via the connection terminals 6, 7 to the load device 200 load currents are supplied.
  • the terminals 6 and 7 are connected in parallel.
  • the assembled batteries 2, 3, and 4 are each configured by connecting a plurality of secondary batteries B, for example, in series.
  • each secondary battery B may be configured by, for example, a plurality of single cells in parallel, series, or a combination of parallel and series, or may be a single cell. Further, the secondary battery B may be used instead of the assembled batteries 2, 3, 4.
  • each secondary battery B various secondary batteries such as a lithium ion secondary battery and a nickel hydride secondary battery can be used.
  • a plurality of voltage detectors 21 that detect the terminal voltage of each secondary battery B in the assembled battery 2 a plurality of voltage detectors 31 that detect the terminal voltage of each secondary battery B in the assembled battery 3, and the assembled battery 4 are provided with a plurality of voltage detectors 41 for detecting the terminal voltage of each secondary battery B.
  • the voltage detection parts 21, 31, and 41 are not restricted to the example which detects the terminal voltage of each secondary battery B, The structure which detects each terminal voltage Vt of the assembled batteries 2, 3, and 4 may be sufficient.
  • the temperature detectors 23, 33, and 43 are configured using, for example, a temperature sensor such as a thermistor or a thermocouple, and an analog / digital converter.
  • the temperature detectors 23, 33, 43 are provided in the vicinity of the assembled batteries 2, 3, 4 and detect the temperatures T of the assembled batteries 2, 3, 4.
  • Each of the temperature detectors 23, 33, and 43 may include a plurality of temperature sensors, and may detect the temperatures of the plurality of secondary batteries B included in the assembled batteries 2, 3, and 4, respectively,
  • One temperature sensor may be provided for two secondary batteries B adjacent in the battery, and the temperature may be detected for each of the two secondary batteries B. If a temperature sensor is arranged between adjacent secondary batteries B so that the temperature is detected for every two secondary batteries B, the number of temperature sensors is reduced while ensuring the accuracy of temperature detection. Thus, the cost can be reduced.
  • the temperature detectors 23, 33, and 43 include a plurality of sensors, for example, the highest temperature among the temperatures of the secondary batteries B detected in the assembled batteries 2, 3, 4 is set to the assembled batteries 2, 3. , 4 can be used as each temperature T.
  • the current detectors 22, 32, 42 are configured using, for example, a shunt resistor, a current transformer, an analog-digital converter, or the like. Then, the current detection units 22, 32, 42 output, for example, signals to the control unit 5 that represent charging currents of the assembled batteries 2, 3, 4 as positive current values and discharge currents as negative current values.
  • a p-channel FET Field Effect Transistor
  • an n-channel FET is used as the discharging switching elements 24, 34, 44 and the charging switching elements 25, 35, 45.
  • the discharging switching elements 24, 34, 44 are connected in a direction in which the charging current of the assembled batteries 2, 3, 4 is in the forward direction of the parasitic diode, and the charging switching elements 25, 35, 45 are connected to the assembled battery 2 , 3 and 4 are connected in the direction in which the parasitic diodes are in the forward direction.
  • the discharging switching elements 24, 34, and 44 are configured to turn on and off only the current in the discharging direction while constantly flowing the current in the charging direction. Further, the charging switching elements 25, 35, and 45 are designed to turn on and off only the current in the charging direction while the current in the discharging direction always flows.
  • the series circuit is not limited to three as long as a plurality of series circuits are connected in parallel.
  • the control unit 5 includes, for example, a CPU (Central Processing Unit) that executes predetermined arithmetic processing, a nonvolatile ROM (Read Only Memory) that stores a predetermined control program, and a RAM (Random) that temporarily stores data. (Access Memory) and peripheral circuits thereof. Then, the control unit 5 executes, for example, a control program stored in the ROM, so that the block voltage calculation unit 51, the first current limiting unit 52, the second current limiting unit 53, the third current limiting unit 54, the first Functions as a restriction release unit 55, a second restriction release unit 56, and a third restriction release unit 57.
  • a CPU Central Processing Unit
  • ROM Read Only Memory
  • RAM Random
  • the control unit 5 executes, for example, a control program stored in the ROM, so that the block voltage calculation unit 51, the first current limiting unit 52, the second current limiting unit 53, the third current limiting unit 54, the first Functions as a restriction release unit 55, a second restriction release unit 56
  • the block voltage calculation unit 51 calculates the total value of the detection voltages of the voltage detection units 21 as the terminal voltage Vt of the assembled battery 2, and sets the total value of the detection voltages of the voltage detection units 31 as the terminal voltage Vt of the assembled battery 3.
  • the total value of the detection voltages of the voltage detection units 41 is calculated as the terminal voltage Vt of the assembled battery 4.
  • the assembled battery that satisfies the first determination condition is set as a current limiting target battery, and the discharging switching element and the charging switching element connected in series with the current limiting target battery are turned off.
  • the temperature threshold Toff an appropriate temperature for determining whether the assembled batteries 2, 3, and 4 are overheated, for example, a temperature at which the safety is lowered or the deterioration is remarkable is appropriately set. For example, 60 ° C. is used. .
  • the second current limiting unit 53 exceeds one of the terminal voltages Vt of the assembled batteries 2, 3, 4 detected by the block voltage calculation unit 51, that is, the second determination.
  • filling conditions the assembled battery which satisfy
  • the first threshold voltage Voff1 for example, the full charge voltage of the assembled batteries 2, 3 and 4 can be used.
  • the third current limiting unit 54 does not satisfy the preset second threshold voltage Voff2 of any of the terminal voltages Vt of the assembled batteries 2, 3 and 4 detected by the block voltage calculation unit 51, that is, the third When the determination condition is satisfied, the assembled battery that satisfies the third determination condition is set as a current limit target battery, and the discharge switching element connected in series with the current limit target battery is turned off.
  • the second threshold voltage Voff2 for example, a voltage suitable for determining overdischarge of the assembled batteries 2, 3 and 4 can be appropriately set.
  • determination conditions are not limited to the first, second, and third determination conditions, and conditions for determining an abnormality of the assembled batteries 2, 3, and 4 (secondary batteries) can be set as appropriate.
  • the first restriction release unit 55 reduces the temperature T of the assembled battery that is set as a current restriction target battery by the first current restriction unit 52 to a temperature threshold value Ton that is set to a temperature threshold value Toff or less, and sets the first determination condition as When the battery is not satisfied, the terminal voltage Vt of the current limiting target battery is set to the first terminal voltage V1 (first voltage related information), and the terminal voltage Vt of the assembled battery that is not the current limiting target battery is set to the second terminal voltage V2 (second voltage). Voltage-related information).
  • the first restriction release unit 55 indicates that the difference between the first terminal voltage V1 and the second terminal voltage V2 is less than the preset determination voltage V0, the first restriction release unit 55 is connected in series with the current restriction target battery. The discharging switching element and the charging switching element are turned on.
  • the temperature threshold Ton for example, 50 ° C.
  • the determination voltage V0 is set in advance to, for example, 0.2 V as a voltage corresponding to the potential difference so that excessive inrush current does not occur even when battery packs having a potential difference in the terminal voltage Vt are connected. Has been.
  • the temperature threshold value Ton and the temperature threshold value Toff may be the same temperature.
  • the terminal voltage Vt of the assembled battery that is set as a current restriction target battery by the second current restriction unit 53 decreases to the first threshold voltage Von1 or less set to the first threshold voltage Voff1 or less, that is, When the second determination condition is not satisfied, the terminal voltage Vt of the current limiting target battery is set as the first terminal voltage V1, and the terminal voltage Vt of the assembled battery that is not the current limiting target battery is set as the second terminal voltage V2.
  • the second restriction release unit 56 indicates that the difference between the first terminal voltage V1 and the second terminal voltage V2 is less than the determination voltage V0, the charging switching element connected in series with the current restriction target battery Turn on.
  • the first threshold voltage Von1 When the first threshold voltage Von1 is set to a voltage lower than the first threshold voltage Voff1, a hysteresis can be provided between the operating voltage of the second current limiting unit 53 and the operating voltage of the second limit releasing unit 56.
  • the first threshold voltage Von1 and the first threshold voltage Voff1 may be the same voltage.
  • the third restriction release unit 57 increases the terminal voltage Vt of the assembled battery that is the current restriction target battery by the third current restriction unit 54 to the second threshold voltage Von2 or more set to the second threshold voltage Voff2 or more, that is, When the third determination condition is not satisfied, the terminal voltage Vt of the current limiting target battery is further set as the first terminal voltage V1, and the terminal voltage Vt of the assembled battery that is not the current limiting target battery is set as the second terminal voltage V2.
  • the third restriction release unit 57 indicates that the difference between the first terminal voltage V1 and the second terminal voltage V2 is less than the determination voltage V0, the discharge switching element connected in series with the current restriction target battery Turn on.
  • the second threshold voltage Von2 when the second threshold voltage Von2 is set to a voltage higher than the second threshold voltage Voff2, a hysteresis can be provided between the operating voltage of the third current limiting unit 54 and the operating voltage of the third limit releasing unit 57.
  • the second threshold voltage Von2 and the second threshold voltage Voff2 may be the same voltage.
  • step S1 the temperature detectors 23, 33, and 43 detect the temperatures T of the assembled batteries 2, 3, and 4 (step S1).
  • the first current limiting unit 52 confirms whether any one of the temperatures T of the assembled batteries 2, 3, 4 exceeds the temperature threshold value Toff, that is, whether it is abnormal (step S 3). . If none of them exceeds the temperature threshold value Toff (NO in step S3), the process proceeds to step S5. On the other hand, if either of them exceeds the temperature threshold value Toff (YES in step S3), the first current limiting unit 52 As a result, the assembled battery whose temperature T exceeds the temperature threshold value Toff is set as a current limiting target battery, and the discharging switching element and the charging switching element connected in series with the current limiting target battery are turned off (step S4). The process proceeds to step S5.
  • the assembled battery 2 when the temperature T of the assembled battery 2 exceeds the temperature threshold value Toff in step S3, the assembled battery 2 is set as a current limiting target battery by the first current limiting unit 52 in step S4, and the discharging switching element 24 and the charging are charged. Switching element 25 is turned off.
  • the discharging switching element 24 and the charging switching element 25 are turned off, and the current flowing through the assembled battery 2 is cut off. Therefore, the possibility that the assembled battery 2 is overheated and deteriorated or the safety is lowered is reduced.
  • step S5 whether or not any of the terminal voltages Vt calculated by the block voltage calculation unit 51 by the second current limiting unit 53 exceeds the first threshold voltage Voff1, that is, whether or not it is abnormal. Is confirmed (step S5). If neither exceeds the first threshold voltage Voff1 (NO in step S5), the process proceeds to step S7. On the other hand, if either exceeds the first threshold voltage Voff1 (YES in step S5), the second The battery pack whose terminal voltage Vt exceeds the first threshold voltage Voff1 is set as a current limiting target battery by the current limiting unit 53, and the charging switching element connected in series with the current limiting target battery is turned off (step S6). The process proceeds to step S7.
  • step S5 when the terminal voltage Vt of the assembled battery 3 exceeds the first threshold voltage Voff1 in step S5, the assembled battery 3 is made a current restriction target battery by the second current limiting unit 53 in step S6, and switching for charging is performed. Element 35 is turned off.
  • the assembled battery 3 when the assembled battery 3 is charged exceeding full charge and the terminal voltage Vt exceeds the first threshold voltage Voff1, only the charging switching element 35 is turned off and the charging current is cut off. The possibility that the battery 3 is deteriorated due to overcharging or the safety is lowered is reduced. On the other hand, since the discharge switching element 34 remains on, the assembled battery 3 can be discharged via the parasitic diode of the charge switching element 35 and the discharge switching element 34.
  • step S ⁇ b> 7 whether or not any of the terminal voltages Vt calculated by the block voltage calculation unit 51 by the third current limiting unit 54 is lower than the second threshold voltage Voff ⁇ b> 2, that is, whether or not it is abnormal. Is confirmed (step S7). If none of them is lower than the second threshold voltage Voff2 (NO in step S7), the process proceeds to step S11. On the other hand, if either of them does not satisfy the second threshold voltage Voff2 (YES in step S7), the third current The limiting unit 54 sets the assembled battery whose terminal voltage Vt is less than the second threshold voltage Voff2 as the current limiting target battery, and turns off the discharge switching element connected in series with the current limiting target battery (step S8). The process proceeds to step S11.
  • the assembled battery 4 when the assembled battery 4 is discharged until it falls below the discharge end voltage and the terminal voltage Vt falls below the second threshold voltage Voff2, only the discharge switching element 44 is turned off and the discharge current is cut off. The possibility that the assembled battery 4 is deteriorated due to overdischarge or the safety is lowered is reduced. On the other hand, since the charging switching element 45 remains on, the assembled battery 4 can be charged via the charging switching element 45 and the parasitic diode of the discharging switching element 44.
  • step S11 the first restriction release unit 55 confirms whether or not the temperature T of the assembled battery set as the current restriction target battery by the first current restriction unit 52 is equal to or lower than the temperature threshold value Ton. (Step S11). If the temperature T is not equal to or lower than the temperature threshold value Ton (NO in step S11), the process proceeds to step S13. On the other hand, if the temperature T is equal to or lower than the temperature threshold value Ton (YES in step S11), the first limit is set.
  • the terminal voltage Vt of the assembled battery set as the current limiting target battery by the first current limiting unit 52 is set as the first terminal voltage V1 by the canceling unit 55, and the terminal voltage Vt of the assembled battery that is not the current limiting target battery is It is set as the second terminal voltage V2 (step S12).
  • release part 55 should just set any one among the terminal voltages Vt of the assembled battery which is not a current restriction
  • the first limit release unit 55 compares the absolute value of the difference between the first terminal voltage V1 and the second terminal voltage V2 with the determination voltage V0 (step S13), and the absolute value of the difference is greater than or equal to the determination voltage V0.
  • the process proceeds to step S15 with the discharging switching element and the charging switching element connected in series with the current limiting target battery turned off, while the absolute value of the difference is less than the determination voltage V0.
  • the discharging switching element and the charging switching element connected in series with the current limiting target battery are turned on (step S14), and the process proceeds to step S15.
  • the assembled battery set by the first current limiting unit 52 as the current limiting target battery is the assembled battery 2
  • the temperature T of the assembled battery 2 is decreased to be equal to or lower than the temperature threshold Ton (step S ⁇ b> 11). YES)
  • charging / discharging of the assembled battery 2 can be started under temperature conditions.
  • the potential difference between the terminal voltage Vt of another assembled battery that is not the current limiting battery and the terminal voltage Vt of the assembled battery 2 is equal to or higher than the determination voltage V0, the discharge switching element 24 and the charging switching element 25 are immediately turned on. An excessive inrush current may flow due to the potential difference.
  • step S13 the power supply device 1 shown in FIG. 1 proceeds to step S15 without turning on the discharging switching element 24 and the charging switching element 25. The possibility of inrush current flowing is reduced.
  • step S14 the discharge switching element 24 and the charging switching element 25 are turned on and the assembled battery 2 is charged again only when this potential difference does not reach the determination voltage V0 and therefore there is no possibility that an inrush current flows. It becomes possible to discharge.
  • step S15 whether or not the terminal voltage Vt of the assembled battery set as the current limit target battery by the second current limiter 53 is equal to or lower than the first threshold voltage Von1 by the second limit release unit 56. Confirmed (step S15). If the terminal voltage Vt is not equal to or lower than the first threshold voltage Von1 (NO in step S15), the process proceeds to step S19, while if the terminal voltage Vt is equal to or lower than the first threshold voltage Von1 (in step S15). YES), the second limit release unit 56 sets the terminal voltage Vt of the assembled battery set as the current limiting target battery by the second current limiting unit 53 as the first terminal voltage V1 and is not the current limiting target battery. Is set as the second terminal voltage V2 (step S16).
  • the second limit release unit 56 compares the absolute value of the difference between the first terminal voltage V1 and the second terminal voltage V2 with the determination voltage V0 (step S17), and the absolute value of the difference is greater than or equal to the determination voltage V0.
  • the process proceeds to step S19 with the charging switching element connected in series with the current limiting target battery turned off, while the absolute value of the difference is less than the determination voltage V0 (in step S17). YES), the charging switching element connected in series with the current limiting target battery is turned on (step S18), and the process proceeds to step S19.
  • step S15 when the assembled battery set by the second current limiting unit 53 as the current limiting target battery is the assembled battery 3, if the terminal voltage Vt of the assembled battery 3 is reduced to be equal to or lower than the first threshold voltage Von1 ( In step S15, YES), since the assembled battery 3 is out of the overvoltage state, charging of the assembled battery 3 can be started. However, if the potential difference between the terminal voltage Vt of another assembled battery that is not a current limiting target battery and the terminal voltage Vt of the assembled battery 3 is equal to or higher than the determination voltage V0, if the charging switching element 35 is turned on immediately, An inrush current may flow.
  • step S17 when the potential difference is equal to or higher than the determination voltage V0 (NO in step S17), the power supply device 1 shown in FIG. 1 shifts to step S19 without turning on the charging switching element 35, so that an inrush current may flow. Reduced.
  • step S18 the charging switching element 35 is turned on and the assembled battery 3 can be charged again only when the potential difference does not reach the determination voltage V0 and therefore there is no possibility of inrush current flowing.
  • step S19 whether or not the terminal voltage Vt of the assembled battery set as the current limiting target battery by the third current limiting unit 54 is equal to or higher than the second threshold voltage Von2 by the third limit releasing unit 57. Confirmed (step S19). If the terminal voltage Vt is not equal to or higher than the second threshold voltage Von2 (NO in step S19), the process proceeds to step S1 again, while if the terminal voltage Vt is equal to or higher than the second threshold voltage Von2 (step S19). YES), the third limit release unit 57 sets the terminal voltage Vt of the assembled battery set as the current limiting target battery by the third current limiting unit 54 as the first terminal voltage V1 and is not the current limiting target battery. The battery terminal voltage Vt is set as the second terminal voltage V2 (step S20).
  • the third restriction release unit 57 compares the absolute value of the difference between the first terminal voltage V1 and the second terminal voltage V2 with the determination voltage V0 (step S21), and the absolute value of the difference is greater than or equal to the determination voltage V0.
  • the process proceeds to step S1 again with the discharge switching element connected in series with the current limiting target battery turned off, while the absolute value of the difference is less than the determination voltage V0 (step S21).
  • step S22 the process proceeds to step S1 again after the discharge switching element connected in series with the current limiting target battery is turned on (step S22).
  • the assembled battery set by the third current limiting unit 54 as the current limiting target battery is the assembled battery 4
  • the terminal voltage Vt of the assembled battery 4 increases to be equal to or higher than the second threshold voltage Von2 ( In step S19, YES)
  • the terminal voltage Vt of the assembled battery 4 increases to be equal to or higher than the second threshold voltage Von2 ( In step S19, YES)
  • the discharge switching element 44 is turned on immediately, Inrush current may flow.
  • the power supply device 1 shown in FIG. 1 shifts to step S1 without turning on the discharge switching element 44, so that an inrush current may flow. Reduced.
  • step S22 the discharge switching element 44 is turned on and the assembled battery 3 can be discharged again only when this potential difference does not reach the determination voltage V0 and therefore there is no possibility of inrush current flowing.
  • steps S1 to S22 in order to reduce inrush current that may be generated when a secondary battery once disconnected is connected in parallel from a parallel circuit in which a plurality of secondary batteries are connected in parallel.
  • the risk of such inrush current can be reduced without using any current limiting resistor.
  • steps S3, S5, and S7 only the assembled battery in which abnormality is detected is prohibited from being discharged, charged, or charged / discharged, and the assembled battery in which abnormality is not detected is maintained in a chargeable / dischargeable state. Even if an abnormality occurs in the assembled battery, it is possible to continue the operation of the power supply device 1 with the remaining assembled battery.
  • control unit 5a further includes an SOC acquisition unit 58 (voltage-related information acquisition unit) that calculates the SOC (State (Of Charge) of the assembled batteries 2, 3, and 4.
  • SOC acquisition unit 58 voltage-related information acquisition unit
  • the first restriction release unit 55a, the second restriction release unit 56a, and the third restriction release unit 57a are based on the SOC obtained by the SOC acquisition unit 58 instead of the first terminal voltage V1 and the second terminal voltage V2. It is good also as a structure using 1SOC1 and 2nd SOC2.
  • the SOC acquisition unit 58 calculates the SOC of the assembled batteries 2, 3, 4 by continuously integrating the current values detected by the current detection units 22, 32, 42. In this case, since the SOC is correlated with the terminal voltage Vt of the assembled batteries 2, 3, 4, it corresponds to an example of voltage-related information.
  • the first restriction releasing unit 55a, the second restriction releasing unit 56a, and the third restriction releasing unit 57a perform the operations of steps S12a, S13a, S16a, S17a, S20a, and S21a as shown in FIG. Different.
  • the operations in steps S1 to S8 are the same as those of power supply device 1 shown in FIG.
  • the same operations as those in the flowchart shown in FIG. 3 are denoted by the same step numbers, and the description thereof is omitted.
  • the SOC calculation operation by the SOC acquisition unit 58 is continuously executed in parallel with the processing of steps S1 to S22.
  • step S12a the SOC of the assembled battery set by the first current limiter 52 as the current limit target battery is set as the first SOC1 (first voltage related information) by the first limit release unit 55a, and the current limit target The SOC of the assembled battery that is not a battery is set as the second SOC2 (second voltage related information) (step S12a).
  • the first restriction release unit 55a compares the absolute value of the difference between the first SOC1 and the second SOC2 with the SOC determination value SOC0 (step S13a), and when the absolute value of the difference is equal to or greater than the SOC determination value SOC0 (step S13a). If NO in step S13, the process proceeds to step S15. If the absolute value of the difference is less than the SOC determination value SOC0 (YES in step S13a), the process proceeds to step S14. For example, 30% can be used as the SOC determination value SOC0.
  • the SOC determination value SOC0 is used instead of the determination voltage V0. Therefore, it is possible to determine the SOC difference that does not cause an excessive inrush current.
  • steps S16a and S17a are the same as the operations of steps S20a and S21a, in which the first current limiter 52 and the first limit release unit 55a in steps S12a and 13a are replaced with the second current limiter 53 and the second limit release unit 56a. Since the first current limiting unit 52 and the first limit releasing unit 55a in steps S12a and 13a are the same as the third current limiting unit 54 and the third limit releasing unit 57a, the description thereof will be omitted.
  • the charge / discharge control circuit includes a plurality of secondary batteries connected in parallel, a plurality of switching units connected in series, and a state detection unit that detects a state of each of the secondary batteries. And when any of the states of the secondary batteries detected by the state detection unit satisfies a predetermined determination condition, the secondary battery satisfying the determination condition is set as a current limiting target battery, and the current A current limiting unit that turns off a switching unit connected in series with the restriction target battery, a voltage-related information acquisition unit that acquires information on the terminal voltage of each secondary battery as voltage-related information from each of the secondary batteries, and The current limit target battery in which the state detected by the state detection unit for the current limit target battery does not satisfy the determination condition and is acquired by the voltage related information acquisition unit
  • the first voltage-related information related to the first terminal voltage that is the terminal voltage and the second voltage-related information related to the second terminal voltage that is the terminal voltage of the secondary battery other than the current limiting target battery are the first terminal voltage and
  • control method of the power supply device is a control method of a power supply device including a plurality of secondary batteries connected in parallel and a plurality of switching units each connected in series
  • the state detection unit includes: The step of detecting the state of each secondary battery, and the current limiting unit, when any of the states of the secondary batteries detected by the state detection unit satisfies a predetermined determination condition, The secondary battery satisfying the determination condition is set as a current limiting target battery, the step of turning off the switching unit connected in series with the current limiting target battery, and the voltage-related information acquisition unit, from each secondary battery, to each secondary battery
  • First voltage related information related to the first terminal voltage which is a terminal voltage of the current limiting target battery, which is not satisfied and acquired by the voltage related information acquiring unit, and a terminal voltage of a
  • each secondary battery can be individually disconnected from or connected to another secondary battery by each switching element. It has become. Further, when any of the states of each secondary battery satisfies a predetermined determination condition, the secondary battery that satisfies the determination condition is set as a current limit target battery by the current limiting unit, and the current limit target battery Is switched off in series, and the current limiting target battery is disconnected from the other secondary batteries.
  • the state of the current limit target battery does not satisfy the determination condition, and the first voltage related information on the first terminal voltage that is the terminal voltage of the current limit target battery, and the secondary battery other than the current limit target battery
  • the second voltage related information related to the second terminal voltage which is the terminal voltage
  • the current limiting target battery is connected in series. Since the switching unit is turned on, the inrush current due to the voltage difference can be reduced without using a current limiting resistor.
  • the state detection unit detects the temperature of each secondary battery as the state, and the determination condition includes a first determination condition on the condition that the temperature exceeds a preset temperature threshold, When any of the states of the secondary batteries satisfies the first determination condition, the current limiting unit sets the secondary battery that satisfies the first determination condition as a current limit target battery, and the current limit target battery
  • the switching unit connected in series is turned off, and the restriction releasing unit is configured such that the temperature of the current limiting target battery does not satisfy the first determination condition, and the first voltage related information and the second voltage related information are When it is indicated that the difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage, it is preferable to turn on the switching unit connected in series with the current limiting target battery.
  • the current limiting unit sets the secondary battery as a current limiting target battery, and the current limiting target battery
  • the switching unit connected in series is turned off, the current flowing through the secondary battery having a temperature exceeding the temperature threshold is limited, and the secondary battery is protected.
  • the temperature of the current limiting target battery is below the temperature threshold and the voltage difference between the terminal voltage of the current limiting target battery and the terminal voltage of the other secondary battery is a small value that does not reach the determination voltage
  • the switching unit connected in series with the current limiting target battery is turned on by the limit canceling unit, the inrush current due to the voltage difference can be reduced without using a current limiting resistor.
  • the restriction release unit does not satisfy the first determination condition because the temperature of the current restriction target battery is lower than the temperature threshold, and the first voltage related information and the second voltage related information are: When it is indicated that the difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage, it is preferable to turn on the switching unit connected in series with the current limiting target battery.
  • the temperature of the current limiting target battery is lowered to the temperature threshold value, and the switching unit connected in series with the current limiting target battery is not turned on unless the temperature threshold value is decreased.
  • a hysteresis is provided between the temperature at which the switching unit is turned off and the temperature at which the switching unit is turned on, and the on / off operation of the switching unit is stabilized.
  • each of the switching units is configured such that a charging switching element that prohibits charging and a discharging switching element that prohibits discharging of each of the secondary batteries are connected in series
  • the state detection unit includes The terminal voltage of each secondary battery is detected as the state
  • the determination condition includes a second determination condition in which the terminal voltage exceeds a preset first threshold voltage
  • the current limiting unit includes When any one of the terminal voltages of the secondary batteries satisfies the second determination condition, the secondary battery satisfying the second determination condition is set as a current limit target battery, and is connected in series with the current limit target battery.
  • the charging switching element is turned off, and the limit release unit is configured such that the terminal voltage of the current limiting target battery does not satisfy the second determination condition, and the first voltage related information and the second voltage related information are Indicate that the serial difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage, it is preferable to turn on the current limiting target cell and connected in series charging switching element.
  • each switching unit includes a charging switching element that prohibits charging of each secondary battery and a discharging switching element that prohibits discharging. It is possible to prohibit only charging or discharging.
  • the current limiting unit sets the secondary battery as a current limiting target battery, and the current limiting target battery
  • the terminal voltage of the said current limiting object battery falls below the 1st threshold voltage, and the voltage difference between the terminal voltage of the current limiting object battery and the terminal voltage of the other secondary battery is less than the determination voltage.
  • the switching unit connected in series with the current limiting target battery is turned on by the limit release unit, the inrush current due to the voltage difference can be reduced without using a current limiting resistor. it can.
  • the limit release unit does not satisfy the second determination condition because a terminal voltage of the current limiting target battery is lower than a first threshold voltage, and the first voltage related information and the second voltage related information are When the difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage, it is preferable to turn on the charging switching element connected in series with the current limiting target battery.
  • the terminal voltage of the current limiting target battery is reduced to the first threshold voltage. If the terminal voltage is not lower than the first threshold voltage, the switching unit connected in series with the current limiting target battery is turned on. Therefore, hysteresis is provided between the temperature at which the switching unit is turned off and the temperature at which the switching unit is turned on, and the on / off operation of the switching unit is stabilized.
  • each of the switching units is configured such that a charging switching element that prohibits charging and a discharging switching element that prohibits discharging of each of the secondary batteries are connected in series
  • the state detection unit includes The terminal voltage of each secondary battery is detected as the state
  • the determination condition includes a third determination condition on condition that the terminal voltage is less than a preset second threshold voltage, and the current limiting unit
  • the secondary battery that satisfies the third determination condition is set as a current limit target battery and is connected in series with the current limit target battery.
  • the discharge switching element is turned off, and the limit release unit determines that the terminal voltage of the current limiting target battery does not satisfy the third determination condition, and the first voltage related information and the second voltage related information are To indicate that the difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage, it is preferable to turn on the current limiting target cell and connected in series discharge switching element.
  • the current limiting unit sets the secondary battery as a current limiting target battery, and the current
  • the discharge switching element connected in series with the restriction target battery is turned off, the secondary battery whose terminal voltage is lower than the second threshold voltage is prohibited from being further discharged, and the secondary battery is protected. Is done.
  • the terminal voltage of the current limiting target battery is increased to be equal to or higher than the second threshold voltage, and the voltage difference between the terminal voltage of the current limiting target battery and the terminal voltage of the other secondary battery is less than the determination voltage.
  • the switching unit connected in series with the current limiting target battery is turned on by the limit release unit, the inrush current due to the voltage difference can be reduced without using a current limiting resistor. it can.
  • the limit release unit does not satisfy the third determination condition because a terminal voltage of the current limiting target battery exceeds the second threshold voltage, and the first voltage related information and the second voltage related information However, when the difference between the first terminal voltage and the second terminal voltage is less than a predetermined determination voltage, it is preferable to turn on the discharge switching element connected in series with the current limiting target battery. .
  • the terminal voltage of the current limiting target battery rises to the second threshold voltage. If the terminal voltage does not exceed the second threshold voltage, the switching unit connected in series with the current limiting target battery is turned on. Therefore, hysteresis is provided between the temperature at which the switching unit is turned off and the temperature at which the switching unit is turned on, and the on / off operation of the switching unit is stabilized.
  • the voltage-related information acquisition unit is a voltage detection unit that acquires a terminal voltage of each secondary battery as the voltage-related information, and the first voltage-related information is the first terminal voltage,
  • the second voltage related information is preferably the second terminal voltage.
  • the terminal voltage of the current limiting target battery detected by the voltage detection unit is the first terminal voltage
  • the terminal voltage of the secondary battery other than the current limiting target battery detected by the voltage detection unit is The second terminal voltage is used.
  • the voltage-related information acquisition unit is an SOC acquisition unit that acquires the SOC of each secondary battery as the voltage-related information
  • the limit release unit is the current limit acquired by the SOC acquisition unit.
  • the current detection target battery is detected by the state detection unit. If the state does not satisfy the determination condition, and the difference between the SOC that is the first voltage related information and the SOC that is the second voltage related information is less than a preset SOC determination value, the first terminal voltage
  • the switching unit connected in series with the current limiting target battery may be turned on assuming that the difference between the first terminal voltage and the second terminal voltage is less than a preset determination voltage. .
  • the SOC acquisition unit acquires the SOC of each secondary battery, uses the SOC of the current limit target battery as the first voltage-related information, and sets the second battery SOC other than the current limit target battery to the second level. Used as voltage related information. Since the SOC of the secondary battery and the terminal voltage have a correlation, the limit release unit determines that the current limit target battery does not satisfy the determination condition, and the SOC and the second voltage related information are the first voltage related information.
  • the terminal voltage of the current limiting target battery and another secondary battery is turned on by turning on the switching unit connected in series with the current limiting target battery. As a result of turning on the switching unit connected in series with the current limiting target battery in a state where the difference is small, the inrush current due to the voltage difference can be reduced without using a current limiting resistor.
  • each of the plurality of secondary batteries is preferably an assembled battery configured using a plurality of secondary batteries.
  • a plurality of assembled batteries configured using a plurality of secondary batteries are connected in parallel, and each of the assembled batteries connected in parallel and each switching unit are connected in series. In this case, it is easy to set the output voltage of each assembled battery to a desired voltage by combining a plurality of secondary batteries.
  • a power supply device includes the above-described charge / discharge control circuit and the plurality of secondary batteries.
  • the secondary battery in a power supply device using a plurality of secondary batteries, when any of the secondary batteries satisfies a predetermined determination condition, the secondary battery is disconnected from the other secondary batteries. It is. And when the voltage difference between the terminal voltage of the separated secondary battery and the terminal voltage of the other secondary battery becomes a small value less than the judgment voltage, it is connected in series with the separated secondary battery. Since the switching unit is turned on and connected to another secondary battery, inrush current due to the voltage difference can be reduced without using a current limiting resistor.
  • a plurality of series circuits of switching elements and secondary batteries are connected in parallel, and each secondary battery is individually connected to each switching element. It is possible to disconnect from or connect to other secondary batteries.
  • the secondary battery is disconnected from the other secondary batteries.
  • the voltage difference between the terminal voltage of the separated secondary battery and the terminal voltage of the other secondary battery becomes a small value that does not reach the judgment voltage, the secondary battery is connected in series. Since the switching unit is turned on and connected to another secondary battery, inrush current due to the voltage difference can be reduced without using a current limiting resistor.
  • a charge / discharge control circuit, a power supply device, and a control method for the power supply device according to the present invention include a portable personal computer, a digital camera, an electronic device such as a mobile phone, a vehicle such as an electric vehicle and a hybrid car, a solar cell, and a power generation device. It can be suitably used in battery-mounted devices and systems such as a power supply system that combines secondary batteries.

Landscapes

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

Abstract

La présente invention a trait à un circuit de commande de charge/décharge équipé : d'une pluralité d'unités de commutation ; d'une unité de détection d'état ; d'une unité de commande de courant ; d'une unité d'acquisition d'informations concernant la tension ; et d'une unité de restriction/d'annulation. Les multiples unités de commutation sont respectivement connectées en série à plusieurs batteries rechargeables qui sont connectées en parallèle. L'unité de détection d'état détecte quel est l'état de ces batteries rechargeables. Si l'état de l'une quelconque des batteries rechargeables détecté par l'unité de détection d'état satisfait une condition de décision prédéterminée, la batterie rechargeable qui satisfait cette condition de décision est identifiée comme étant une batterie qui doit être soumise à une restriction de courant par l'unité de commande de courant, qui éteint alors l'unité de commutation qui est connectée en série à ladite batterie soumise à une restriction de courant. Les informations relatives à la tension à la borne de ces batteries rechargeables sont acquises à partir desdites batteries rechargeables en tant qu'informations concernant la tension par l'unité d'acquisition d'informations concernant la tension. Les informations concernant la première tension ont trait à une première tension à la borne, qui est la tension d'une borne de la batterie qui est soumise à une restriction de courant. Les informations concernant la deuxième tension ont trait à une deuxième tension à la borne, qui est la tension à la borne d'une batterie rechargeable autre que la batterie qui est soumise à une restriction de courant. Les informations concernant la première tension et les informations concernant la deuxième tension sont acquises par l'unité d'acquisition d'informations concernant la tension si l'état détecté par l'unité de détection d'état eu égard à la batterie soumise à une restriction de courant ne satisfait pas la condition de décision susmentionnée. L'unité d'annulation de commande allume l'unité de commutation qui est connectée en série à la batterie qui est soumise à une restriction de courant si les informations concernant la première tension et les informations concernant la deuxième tension montrent que la différence entre cette première et cette deuxième tension à la borne est inférieure à la tension de décision prédéterminée.
PCT/JP2010/001683 2009-03-13 2010-03-10 Circuit de commande de charge/décharge, dispositif d'alimentation et procédé de commande d'un dispositif d'alimentation WO2010103816A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009060662A JP2010220280A (ja) 2009-03-13 2009-03-13 充放電制御回路、電源装置、及び電源装置の制御方法
JP2009-060662 2009-03-13

Publications (1)

Publication Number Publication Date
WO2010103816A1 true WO2010103816A1 (fr) 2010-09-16

Family

ID=42728112

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/001683 WO2010103816A1 (fr) 2009-03-13 2010-03-10 Circuit de commande de charge/décharge, dispositif d'alimentation et procédé de commande d'un dispositif d'alimentation

Country Status (2)

Country Link
JP (1) JP2010220280A (fr)
WO (1) WO2010103816A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012050032A1 (fr) * 2010-10-15 2012-04-19 三洋電機株式会社 Système d'alimentation électrique
CN103259058A (zh) * 2012-02-20 2013-08-21 三菱重工业株式会社 电力管理系统
US9404976B2 (en) 2013-01-22 2016-08-02 Gs Yuasa International Ltd. Energy storage unit connection information acquiring apparatus
WO2017183395A1 (fr) * 2016-04-21 2017-10-26 株式会社豊田自動織機 Bloc-batterie
WO2017221569A1 (fr) * 2016-06-22 2017-12-28 株式会社豊田自動織機 Bloc-batterie
US10693198B2 (en) 2015-06-30 2020-06-23 Gs Yuasa International Ltd. Controller, energy storage apparatus, energy storage system, moving object, backup power supply, and controller method
US11381094B2 (en) * 2018-05-09 2022-07-05 Lg Energy Solution, Ltd. Battery control apparatus and energy storage system including same
US11710860B2 (en) * 2017-07-24 2023-07-25 Koki Holdings Co., Ltd. Battery pack and electrical apparatus using battery pack

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2629389A1 (fr) * 2010-10-15 2013-08-21 Sanyo Electric Co., Ltd. Système d'alimentation électrique
JP5469625B2 (ja) * 2011-03-01 2014-04-16 株式会社日立製作所 電池システム
WO2012127983A1 (fr) * 2011-03-18 2012-09-27 三洋電機株式会社 Système d'alimentation électrique
JP5664491B2 (ja) * 2011-08-03 2015-02-04 株式会社デンソー 電池制御装置
JP2013078227A (ja) * 2011-09-30 2013-04-25 Sanyo Electric Co Ltd 残容量調整装置
KR101612645B1 (ko) * 2011-10-20 2016-04-26 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 축전 장치 관리 시스템
JP6056344B2 (ja) * 2011-12-12 2017-01-11 日産自動車株式会社 電池接続制御装置
JP2014064362A (ja) * 2012-09-20 2014-04-10 Mitsubishi Heavy Ind Ltd 二次電池システムの制御装置および方法ならびにプログラム、それを備えた自然エネルギー発電システム
CN105075056B (zh) * 2013-03-28 2019-01-15 株式会社村田制作所 蓄电装置、蓄电系统、以及蓄电装置的控制方法
KR101562196B1 (ko) * 2013-08-30 2015-10-22 한국에너지기술연구원 납축전지, 납축전지의 수명 연장을 위한 제어 장치 및 제어 방법
JP2015164378A (ja) * 2014-02-28 2015-09-10 株式会社Ｎｔｔファシリティーズ 蓄電池制御装置、給電システム、蓄電池制御方法、及びプログラム
JP2015165732A (ja) * 2014-02-28 2015-09-17 株式会社Ｎｔｔファシリティーズ 蓄電池制御装置、給電システム、蓄電池制御方法、及びプログラム
US10454302B2 (en) 2014-10-31 2019-10-22 Hewlett Packard Enterprise Development Lp Power source adjustment
KR102377394B1 (ko) * 2015-05-14 2022-03-22 삼성에스디아이 주식회사 에너지 저장 시스템 및 그 구동 방법
DK3356188T3 (da) * 2015-09-30 2020-11-16 Relectrify Pty Ltd Batterisystem
JP6618444B2 (ja) * 2016-09-21 2019-12-11 株式会社エンビジョンＡｅｓｃジャパン 電源システムの電池パック接続判定方法
JP6525354B2 (ja) * 2017-10-23 2019-06-05 三菱電機株式会社 電源平滑用のコンデンサ回路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003244854A (ja) * 2002-02-13 2003-08-29 Mitsubishi Heavy Ind Ltd 蓄電装置の充放電制御装置及び充放電制御方法並びに電力貯蔵システム
JP2007259612A (ja) * 2006-03-24 2007-10-04 Hitachi Ltd 電源制御装置
JP2008295291A (ja) * 2007-04-27 2008-12-04 Sanyo Electric Co Ltd 電源装置及び電動車輌

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003244854A (ja) * 2002-02-13 2003-08-29 Mitsubishi Heavy Ind Ltd 蓄電装置の充放電制御装置及び充放電制御方法並びに電力貯蔵システム
JP2007259612A (ja) * 2006-03-24 2007-10-04 Hitachi Ltd 電源制御装置
JP2008295291A (ja) * 2007-04-27 2008-12-04 Sanyo Electric Co Ltd 電源装置及び電動車輌

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9768612B2 (en) 2010-10-15 2017-09-19 Panasonic Intellectual Property Management Co., Ltd. Power supply system
CN103081280A (zh) * 2010-10-15 2013-05-01 三洋电机株式会社 电源系统
JP5587421B2 (ja) * 2010-10-15 2014-09-10 三洋電機株式会社 電源システム
WO2012050032A1 (fr) * 2010-10-15 2012-04-19 三洋電機株式会社 Système d'alimentation électrique
CN103259058A (zh) * 2012-02-20 2013-08-21 三菱重工业株式会社 电力管理系统
JP2013172534A (ja) * 2012-02-20 2013-09-02 Mitsubishi Heavy Ind Ltd 電力管理システム
US9300154B2 (en) 2012-02-20 2016-03-29 Mitsubishi Heavy Industries, Ltd. Power management system
US9404976B2 (en) 2013-01-22 2016-08-02 Gs Yuasa International Ltd. Energy storage unit connection information acquiring apparatus
EP2757627A3 (fr) * 2013-01-22 2017-11-15 GS Yuasa International Ltd. Appareil d'acquisition d'informations de connexion d'unité de stockage d'énergie
US10693198B2 (en) 2015-06-30 2020-06-23 Gs Yuasa International Ltd. Controller, energy storage apparatus, energy storage system, moving object, backup power supply, and controller method
WO2017183395A1 (fr) * 2016-04-21 2017-10-26 株式会社豊田自動織機 Bloc-batterie
JPWO2017183395A1 (ja) * 2016-04-21 2018-08-09 株式会社豊田自動織機 電池パック
WO2017221569A1 (fr) * 2016-06-22 2017-12-28 株式会社豊田自動織機 Bloc-batterie
US11710860B2 (en) * 2017-07-24 2023-07-25 Koki Holdings Co., Ltd. Battery pack and electrical apparatus using battery pack
US11381094B2 (en) * 2018-05-09 2022-07-05 Lg Energy Solution, Ltd. Battery control apparatus and energy storage system including same

Also Published As

Publication number Publication date
JP2010220280A (ja) 2010-09-30

Similar Documents

Publication Publication Date Title
WO2010103816A1 (fr) Circuit de commande de charge/décharge, dispositif d'alimentation et procédé de commande d'un dispositif d'alimentation
JP5449840B2 (ja) 充放電制御回路、及び電源装置
US8350531B2 (en) Secondary battery charge control method and charge control circuit
US8305045B2 (en) Charge control circuit, battery pack, and charging system
JP4258133B2 (ja) 充電状態制御装置
US8203309B2 (en) Battery pack, and battery system
US7680613B2 (en) Battery management system (BMS) and driving method thereof
US8159186B2 (en) Power source system, power supply control method for the power source system, power supply control program for the power source system, and computer-readable recording medium with the power supply control program recorded thereon
US8749193B1 (en) Battery protection circuit for multiple battery power supply and charging system
KR101262524B1 (ko) 이차 전지의 과전류 보호 장치, 보호 방법 및 전지 팩
WO2009104348A1 (fr) Circuit de commande de charge, dispositif de charge muni de celui-ci et bloc-batterie
US8390296B2 (en) Method and apparatus for detecting abnormality of current sensor in battery pack
KR102052590B1 (ko) 배터리 관리 시스템 및 그 구동 방법
WO2010047046A1 (fr) Circuit de diagnostic de panne, dispositif d’alimentation en énergie et procédé de diagnostic de panne
EP2249452A1 (fr) Système de batterie
JP2010200574A (ja) 自己診断回路、及び電源装置
US20110291619A1 (en) Battery power source device, and battery power source system
JP2009183105A (ja) 充電制御回路、電池パック、及び充電システム
JP2012531884A (ja) 車両用の搭載電気系統および搭載電気系統の制御装置
EP2830189B1 (fr) Dispositif de correction de l'équilibre et système de stockage d'énergie
JP2010273519A (ja) 充放電制御方法
JP2009254165A (ja) 電池状態検出回路、電池パック、及び充電システム
JP2009296699A (ja) 充電制御回路、電源装置、及び充電制御方法
JP2009072053A (ja) 蓄電システム
JP2009300362A (ja) Ｓｏｃ算出回路、充電システム、及びｓｏｃ算出方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10750573

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10750573

Country of ref document: EP

Kind code of ref document: A1