WO2015040655A1 - Switching device and storage battery system - Google Patents

Switching device and storage battery system Download PDF

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Publication number
WO2015040655A1
WO2015040655A1 PCT/JP2013/005571 JP2013005571W WO2015040655A1 WO 2015040655 A1 WO2015040655 A1 WO 2015040655A1 JP 2013005571 W JP2013005571 W JP 2013005571W WO 2015040655 A1 WO2015040655 A1 WO 2015040655A1
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WO
WIPO (PCT)
Prior art keywords
storage battery
current path
electromagnetic contactor
signal
contactor
Prior art date
Application number
PCT/JP2013/005571
Other languages
French (fr)
Japanese (ja)
Inventor
久保　守
岡本　一晃
Original Assignee
パナソニックＩｐマネジメント株式会社
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Ｉｐマネジメント株式会社 filed Critical パナソニックＩｐマネジメント株式会社
Priority to PCT/JP2013/005571 priority Critical patent/WO2015040655A1/en
Publication of WO2015040655A1 publication Critical patent/WO2015040655A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/251—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for stationary devices, e.g. power plant buffering or backup power supplies
    • 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
    • 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
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2200/00—Safety devices for primary or secondary batteries
    • H01M2200/10—Temperature sensitive devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/10—Batteries in stationary systems, e.g. emergency power source in plant
    • 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 switching device and a storage battery system for opening and closing a current path connected to a storage battery.
  • a technology has been developed in which a storage battery and a system power supply are connected in parallel to a load, and the storage battery is used as a backup of power consumed by the load in case of a power failure of the system power supply.
  • Some of such technologies include a storage battery system including a large number of storage batteries as a backup power source for a system that requires a large capacity and a large output.
  • a large number of storage batteries are installed and operated.At this time, a plurality of storage batteries are connected in parallel to form one battery group, and further by connecting the battery groups in series, Large capacity and high output may be realized.
  • a breaker is used to shut off the output of a storage battery in a power storage system.
  • the interruption of the large-capacity and high-output power as described above may be a case where there is no circuit breaker certified by a third party or a high cost.
  • the present invention has been made in view of such a situation, and an object thereof is to provide an alternative technique for a breaker for cutting off electric power.
  • a switching device is arranged on a current path that can be connected to a storage battery, electrically connected to or disconnected from the current path, and operation of the electromagnetic contactor And a control unit for controlling.
  • the control unit When the control unit outputs (1) a disconnection signal for instructing to disconnect the current path when the magnetic contactor is connected to the current path, the control unit outputs the disconnection signal while being activated.
  • the magnetic contactor cuts off the current path, the magnetic contactor is restarted before outputting a connection signal for instructing connection of the current path.
  • a storage battery system includes a storage battery, a current path connectable to the storage battery, and an electromagnetic contactor that is disposed on the current path and electrically connects or disconnects the current path. And a control unit for controlling the operation of the electromagnetic contactor.
  • the control unit (1) when the electromagnetic contactor is connected to the current path, when the disconnection signal for instructing to disconnect the current path is output to the electromagnetic contactor, the control unit is disconnected while being activated. (2) when the electromagnetic contactor is cutting the current path, restart the connection before outputting a connection signal to the magnetic contactor to instruct the connection of the current path. .
  • FIG. 1 is a diagram schematically showing a power distribution system according to an embodiment. It is a figure which shows typically an example of the external appearance of the storage battery system which concerns on embodiment. It is a perspective view which shows the external appearance of the storage battery storage shelf which concerns on embodiment. It is a figure which shows the storage battery accommodation shelf of the state which accommodated the storage battery. It is a figure which shows typically the circuit structure of the switch module which concerns on embodiment. It is a figure which shows typically the circuit structure of the switch module which concerns on the modification of embodiment.
  • FIG. 1 is a diagram schematically showing a power distribution system 100 according to an embodiment of the present invention.
  • the power distribution system 100 includes a storage battery container 200 including a plurality of storage batteries, a solar battery 300 that is a power generator for renewable energy, a bidirectional power conditioner 400, a system power supply 500, and a load 600.
  • System power supply 500 is an AC power supply for supplying power from an electric power company.
  • the solar cell 300 is a power generation device that directly converts light energy into electric power using the photovoltaic effect.
  • As the solar cell 300 a silicon solar cell, a solar cell made of various compound semiconductors, a dye-sensitized type (organic solar cell), or the like is used.
  • the power distribution system 100 may include a fuel cell, wind power generation, and micro hydropower generation (not shown) instead of or in addition to the solar cell 300. Since the power generated by wind power generation or micro hydropower generation is generally AC power generation, when the power distribution system 100 includes wind power generation, an AC / DC converter (not shown) is installed before output to the bidirectional power conditioner 400. To do.
  • the storage battery container 200 includes a plurality of storage battery units 210 including a predetermined number of storage batteries. In the example shown in FIG. 1, there are four storage battery units up to the first storage battery unit 210a, the second storage battery unit 210b, the third storage battery unit 210c, and the fourth storage battery unit 210d. 210 ").
  • Each storage battery unit 210 includes a first storage battery management unit 260a, a second storage battery management unit 260b, a third storage battery management unit 260c, and a fourth storage battery management unit 260d (hereinafter, unless otherwise specifically distinguished, for managing storage batteries, respectively). (Collectively referred to as “storage battery management unit 260”).
  • the storage battery container 200 also includes a master storage battery management unit 220 for controlling each storage battery management unit 260 in an integrated manner.
  • the storage battery container 200 further includes a first switch module 250a, a second switch module 250b, a third switch module 250c, and a fourth switch that can cut off current paths between the storage battery units 210 and the bidirectional power conditioner 400, respectively.
  • a module 250d is provided. Hereinafter, these are collectively referred to as “switch module 250” unless otherwise specified.
  • the storage battery management unit 260 manages the storage battery unit 210.
  • One storage battery system is configured with one storage battery unit 210, switch module 250, and storage battery management unit 260 as a unit. Details of the storage battery system will be described later.
  • Bidirectional power conditioner 400 is connected to storage battery container 200 and solar battery 300 at one end and to system power supply 500 at the other end.
  • the bi-directional power conditioner 400 includes a bi-directional inverter 410, and converts DC power generated by the solar battery 300 or discharged from the storage battery container 200 into AC power under the control of the control unit 420, AC power from the system power supply 500 is converted into DC power.
  • the first DC / DC converter 430a is installed in a conductive path between the switch module 250a and the bidirectional power conditioner 400.
  • the second DC / DC converter 430b is installed in a conductive path between the second switch module 250b and the bidirectional power conditioner 400.
  • the third DC / DC converter 430c and the fourth DC / DC converter 430d are installed between the third switch module 250c and the bidirectional power conditioner 400, and between the fourth switch module 250d and the bidirectional power conditioner 400, respectively. Is done.
  • these DC / DC converters are collectively referred to as “DC / DC converters 430” unless otherwise specified.
  • the DC / DC converter 430 boosts or steps down the DC power converted by the bidirectional power conditioner, and charges / discharges the plurality of storage batteries.
  • the bidirectional power conditioner 400 is also provided with a solar cell DC / DC converter 440, converts the electric power generated by the solar cell 300, and outputs it to the bidirectional inverter 410.
  • the bidirectional power conditioner 400 the electric power of each storage battery unit 210 and the electric power generated by the solar battery 300 can be supplied to the load 600 in cooperation with the system power supply 500. Further, when the system power supply 500 fails, the power of each storage battery unit 210 and the power generated by the solar battery 300 can be supplied to the load 600 as a backup of the system power supply 500.
  • FIG. 2 is a diagram schematically showing an example of the appearance of the storage battery system 240 according to the embodiment.
  • the storage battery system 240 includes a storage battery unit 210, a switch module 250, and a storage battery management unit 260.
  • Storage battery unit 210 includes 70 storage battery packs 212.
  • Each storage battery pack 212 is a rechargeable secondary battery.
  • the storage battery pack 212 is realized by, for example, a lithium ion secondary battery.
  • the storage battery pack 212 is charged by the electric power of the system power source 500 converted into DC power by the bidirectional power conditioner 400.
  • the storage battery management unit 260 measures various physical quantities of the storage battery pack 212, such as the state of charge (State Of Charge; SOC), temperature, voltage, current, etc. of each storage battery pack 212, and the specified physical quantity is the bidirectional power conditioner 400. To provide.
  • the storage battery management unit 260 also performs control such as cooling the storage battery pack 212 by controlling a fan for cooling the storage battery pack 212.
  • a rectangle indicated by reference numeral 212 is one storage battery pack 212.
  • the storage battery pack 212 in the embodiment has a configuration in which cylindrical batteries are connected in 13 series and 24 parallel configurations. In order to avoid complication, not all symbols are attached, but all the rectangles similar to the rectangles denoted by the symbol 212 indicate the storage battery pack 212.
  • FIG. 3 is a perspective view showing an appearance of the storage battery storage shelf 214 according to the embodiment, and illustrates the storage battery storage shelf 214 in an empty state in which the storage battery pack 212 or the storage battery management unit 260 is not stored.
  • the storage battery storage shelf 214 includes a first partition 216a, a second partition 216b, and a third partition for partitioning the storage space between one storage space and another storage space. 216c.
  • FIG. 4 is a diagram showing the storage battery storage shelf 214 in a state in which the storage battery pack 212 is stored. As shown in FIG. 4, the length of the storage space in the Y direction is set so that the storage battery pack 212 just fits in the storage space.
  • the storage battery unit 210 has a power amount of 126 kWh and a large output. For this reason, it is assumed that it is difficult to obtain a breaker suitable for the output of the storage battery unit 210 or that the cost is increased.
  • a breaker Circuit breaker
  • the switch module 250 according to the embodiment replaces the function of the breaker by controlling the magnetic contactor.
  • the switch module 250 according to the embodiment will be described.
  • FIG. 5 is a diagram schematically showing a circuit configuration of the switch module 250 according to the embodiment.
  • the switch module 250 includes a current path including a first current path 257a connected to the positive terminal of the storage battery unit 210 and a second current path 257b connected to the negative terminal (hereinafter, the first current path 257a and the second current path 257b).
  • current path 257 is collectively referred to as “current path 257” unless otherwise specifically distinguished.
  • FIG. 5 the connection relationship of the electrical components in the switch module 250 will be described.
  • the first electromagnetic contactor 251 that electrically connects or disconnects the first current path 257a is connected to the first current path 257a.
  • a second electromagnetic contactor 252 that electrically connects or disconnects the first current path 257a is connected to the second current path 257b.
  • the second current path 257b is grounded.
  • an electromagnetic contactor is an electrical component that opens and closes a current path using the operation of an electromagnet. More specifically, in an electromagnetic contactor, in a normal state, the contact is connected to the current path by an urging force such as a spring, but when electric power is supplied to the electromagnet, the contact is electromagnetized by a magnetic force larger than the urging force. The current path is cut off. Since an electromagnetic contactor can open and close a current path with or without energization of an electromagnet, it is used for, for example, opening and closing of an electric circuit or automatic opening and closing of a remote operation.
  • a third electromagnetic contactor 253 connected in series with the first electromagnetic contactor 251 is further connected on the first current path 257a.
  • a fourth electromagnetic contactor 254 connected in series with the second electromagnetic contactor 252 is further connected on the second current path 257b.
  • the first node N1 exists between the first electromagnetic contactor 251 and the third electromagnetic contactor 253. Further, on the second current path 257b, a second node N2 exists between the second electromagnetic contactor 252 and the fourth electromagnetic contactor 254. A voltage sensor 255 is connected on a path connecting the first node N1 and the second node N2.
  • a third node N3 exists between the third electromagnetic contactor 253 and the positive terminal of the storage battery unit 210.
  • a fourth node N4 exists between the fourth electromagnetic contactor 254 and the negative terminal of the storage battery unit 210 on the second current path 257b.
  • a current-voltage sensor that measures a current flowing through the second current path 257b and measures a voltage between the third node N3 and the fourth node N4 between the fourth node N4 and the negative terminal of the storage battery unit 210. 256 is connected.
  • the first fuse 258a is connected between the first electromagnetic contactor 251 and the bidirectional power conditioner 400 on the first current path 257a.
  • a second fuse 258b is connected between the current / voltage sensor 256 and the negative terminal of the storage battery unit 210 on the second current path 257b.
  • the switch module 250 can open and close a current path between the storage battery unit 210 and the bidirectional power conditioner 400 by opening and closing each electromagnetic contactor.
  • the opening / closing of each electromagnetic contactor in the switch module 250 is basically controlled by the control unit 270 of the storage battery management unit 260. Therefore, the switch module 250 and the storage battery management unit 260 constitute a switching device that controls connection of the storage battery unit 210.
  • control part which controls opening and closing of each electromagnetic contactor in the switch module 250 is not restricted to the case in the storage battery management part 260.
  • it may be in the switch module 250 or in the master storage battery management unit 220.
  • the switch module 250 alone constitutes a switching device that controls connection of the storage battery unit 210.
  • the switch module 250 and the master storage battery management unit 220 constitute a switching device.
  • the control part which controls opening and closing of an electromagnetic contactor may be in the bidirectional
  • connection signal a signal for instructing to connect the current path 257 when the electromagnetic contactor cuts the current path 257. Restart before output to contactor.
  • the control unit 270 is configured not to output a connection signal to the electromagnetic contactor unless it has been restarted.
  • the output of the connection signal is specifically a signal for supplying electric power to the electromagnet in the electromagnetic contactor.
  • the control unit 270 is realized by using an arithmetic unit such as a microcomputer, for example, and requires an explicit instruction from the user for restarting. Therefore, an explicit instruction from the user is required for the control unit 270 to output a connection signal to the electromagnetic contactor. This corresponds to the fact that the breaker once tripped must be manually restored by the user.
  • control unit 270 provides a signal for instructing to disconnect the current path 257 when the first electromagnetic contactor 251 and the second electromagnetic contactor 252 are connected to the current path 257 (hereinafter referred to as “disconnection signal”). ”)" Is output to each electromagnetic contactor, a disconnection signal is output without being restarted. This corresponds to the breaker tripping automatically.
  • control unit 270 it is technically possible for the control unit 270 to output a connection signal without restarting.
  • the switch module 250 according to the embodiment must be after restarting in order to configure a breaker alternative means by combining the controller 270 with the first electromagnetic contactor 251 and the second electromagnetic contactor 252.
  • the control unit 270 is configured not to output a connection signal.
  • the user can also restart the control unit 270 by remote operation. Therefore, in another embodiment, unlike the case of the breaker, the interrupted current path can be restored without actually going to the place where the control unit 270 is installed.
  • Control unit 270 outputs a disconnection signal when detecting a signal suggesting abnormality of storage battery unit 210.
  • the “signal indicating abnormality” is an emergency stop signal from each storage battery pack 212 constituting the storage battery unit 210. For example, a signal indicating overdischarge of the storage battery pack 212, an overcharge of the storage battery pack 212 is performed. These signals are a signal indicating the temperature of the storage battery pack 212, a signal indicating that the storage battery pack 212 is overvoltage, and a signal indicating that the current flowing through the current path 257 is an overcurrent.
  • the “signal indicating abnormality” includes a signal transmitted when the emergency stop switch 280 provided in the storage battery management unit 260 is turned off, a stop signal from the master storage battery management unit 220, and the like. is there.
  • the control unit (not shown) of each storage battery pack 212 determines whether each storage battery pack 212 is overdischarged and whether each storage battery pack 212 is overcharged. It is calculated from the voltage and current of the storage battery obtained from the above. More specifically, the control unit of each storage battery pack 212 suggests overcharge when the calculated storage amount of each storage battery pack 212 is equal to or greater than an overcharge threshold determined to determine whether or not it is overcharge. Is determined to be an abnormal signal. In addition, the control unit of each storage battery pack 212 performs overdischarge when the amount of power stored in each storage battery pack 212 obtained from the SOC calculation unit is equal to or less than an overdischarge threshold determined to determine whether or not it is overdischarge. It is determined as an abnormal signal to suggest.
  • the overcharge threshold and the overdischarge threshold may be determined in consideration of the characteristics of each storage battery pack 212 and the like, for example, 98% and 20%, respectively.
  • the control unit of each storage battery pack 212 acquires a signal related to the temperature of each storage battery pack 212 from a temperature sensor (not shown) in each storage battery pack 212. More specifically, the control unit of each storage battery pack 212 determines that the signal acquired from the temperature sensor is a signal indicating a high temperature abnormality when the temperature acquired from the temperature sensor is equal to or higher than a high temperature threshold temperature determined to determine whether the temperature is abnormal. When the temperature is equal to or lower than a low temperature threshold temperature determined to determine whether or not there is a low temperature abnormality, the signal is determined to indicate a low temperature abnormality.
  • the control unit of each storage battery pack 212 sends a signal indicating that each storage battery pack 212 is overvoltage and a signal indicating that the current flowing through the current path 257 is overcurrent in each storage battery pack 212. Obtained from the current voltage sensor. More specifically, the control unit of each storage battery pack 212 indicates a signal indicating an overvoltage abnormality when the voltage value acquired from the current voltage sensor is equal to or higher than an overvoltage threshold determined to determine whether or not the voltage value is an overvoltage. Is determined. Similarly, the control unit of each storage battery pack 212 similarly indicates a signal indicating an overcurrent abnormality when the current value acquired from the current-voltage sensor is equal to or greater than an overcurrent threshold determined to determine whether or not the current value is an overcurrent. Is determined.
  • the master storage battery management unit 220 communicates with the bidirectional power conditioner 400 and controls the operation of each storage battery management unit 260 based on a control signal acquired from the bidirectional power conditioner 400. For this reason, if the master storage battery management unit 220 becomes unable to communicate with the bidirectional power conditioner 400 due to malfunction of the bidirectional power conditioner 400 or an abnormality in the communication path with the bidirectional power conditioner 400, A disconnection signal is output to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 via the OR circuit 264. Thereby, between the storage battery unit 210 and the bidirectional
  • a disconnect signal is directly output to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 via the OR circuit 264, and the storage battery unit 210 and the bidirectional power conditioner 400 are connected.
  • the gap is electrically disconnected.
  • the control unit 270 performs opening / closing control of the first electromagnetic contactor 251 and the second electromagnetic contactor 252 when detecting a signal suggesting an abnormality of the storage battery unit 210.
  • the first electromagnetic contactor 251 and the second electromagnetic contactor 252 are an emergency stop switch OFF signal, a stop signal from the master storage battery management unit 220, and an emergency from each storage battery pack 212 constituting the storage battery unit 210. It is shut off by the stop signal.
  • the stop signal in the master storage battery management part 220 is transmitted by receiving the signal which notifies the action
  • the control unit 270 performs the third electromagnetic contactor 253 or the fourth The open / close control of the magnetic contactor 254 is executed, and switching between cutoff and energization is performed for charge / discharge control of the storage battery unit 210. In the normal control, the control unit 270 does not require restarting for reconnection of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254.
  • the first electromagnetic contactor 251 and the third electromagnetic contactor 253 are connected to the first current path 257a, and both are used to electrically cut off the first current path 257a. Therefore, when one of the first electromagnetic contactor 251 and the third electromagnetic contactor 253 cannot cut off the first current path 257a due to, for example, contact welding or the like, the control unit 270 A cutting signal is output to the magnetic contactor.
  • the control unit 270 outputs a cutting signal to the first electromagnetic contactor 251. If the first electromagnetic contactor 251 operates normally and the first current path 257a can be electrically cut off, the first electromagnetic contactor 251 notifies the control unit 270 of a signal indicating a cut-off state. However, when the first electromagnetic contactor 251 maintains the energized state for contact welding or the like, the first electromagnetic contactor 251 notifies the control unit 270 of a signal indicating a state in which it is not interrupted.
  • the control unit 270 determines the operating state of the first electromagnetic contactor 251 based on the signal from the first electromagnetic contactor 251 before and after the output of the disconnection signal to the first electromagnetic contactor 251.
  • the control unit 270 passes through the OR circuit 264.
  • a cutting signal is output to the third electromagnetic contactor 253. Thereby, even if the first electromagnetic contactor 251 malfunctions, the first current path 257a can be electrically cut off.
  • the second electromagnetic contactor 252 and the fourth electromagnetic contactor 254 are connected to the second current path 257b, and both are used to electrically cut off the second current path 257b. Therefore, as in the case of the first electromagnetic contactor 251 and the third electromagnetic contactor 253 in the first current path 257a, when either the second electromagnetic contactor 252 or the fourth electromagnetic contactor 254 is contact-welded, A disconnect signal is output to one of them.
  • the control unit 270 in the case of detecting a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal suggesting an abnormality of the storage battery unit 210, the first electromagnetic contactor 251 and the first 2 Basically, the switching control of the electromagnetic contactor 252 is basically performed. However, when a malfunction occurs in these electromagnetic contactors, the current path is controlled by controlling the opening and closing of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254. The reliability of electrical disconnection of 257 can be increased.
  • the control unit 270 detects the first electromagnetic contactor 251 and the second electromagnetic contact when detecting a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal indicating an abnormality of the storage battery unit 210.
  • a disconnection signal is output to the device 252
  • the disconnection signal is first output to one of the first electromagnetic contactor 251 and the second electromagnetic contactor 252, and then the other electromagnetic contact A disconnect signal may be output to the device.
  • the control unit 270 outputs the disconnection signal to the second electromagnetic contactor 252 after outputting the disconnection signal to the first electromagnetic contactor 251.
  • a first electromagnetic contactor 251 provided in the first current path 257a and a second electromagnetic contactor 252 provided in the second current path 257b are respectively disposed.
  • the first electromagnetic contactor 251 and the second electromagnetic contactor 252 are arranged, and by blocking both, safety is ensured in both the first current path 257a and the second current path 257b. can do.
  • each of the first electromagnetic contactor 251, the second electromagnetic contactor 252, the third electromagnetic contactor 253, and the fourth electromagnetic contactor 254 is not a single electromagnetic contactor, but two electromagnetic contactors having different polarities. You may connect and comprise in parallel. Thereby, the interruption
  • the switching device including the switch module 250 and the control unit 270 according to the embodiment, it is possible to provide a breaker alternative technique for cutting off power.
  • the breaker is intended to cut off the excessive current, but the switching device according to the embodiment suggests various abnormalities other than the excessive current by substituting the function of the breaker with a combination of a magnetic contactor and a control unit.
  • the current path can be interrupted by the signal. Further, unlike the case where the breaker trips, the user can return the current path by remote control. Moreover, it contributes to space saving and cost reduction compared with the case where a breaker is used.
  • the control unit 270 receives a signal indicating a communication abnormality from the master storage battery management unit 220 and disconnects the first electromagnetic contactor 251 and the second electromagnetic contactor 252. A signal may be transmitted.
  • the opening / closing control of each electromagnetic contactor can be unified with the control unit 270, which is advantageous in that the opening / closing control is simplified.
  • the control unit 270 sends a disconnection signal to the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254 when a signal indicating a communication abnormality is received. You may make it output.
  • a disconnection signal is transmitted to the first electromagnetic contactor 251 and the second electromagnetic contactor 252. Since the order of the switching control of each electromagnetic contactor is unified, there is an effect in that the switching control is simplified.
  • the contactor in the normal state, the contactor is connected to the current path by an urging force such as a spring in the normal state.
  • the case where the current path is disconnected has been described.
  • the electromagnetic contactor is not limited to this case.
  • the contactor In a normal state, the contactor is separated from the current path by the biasing force of a spring or the like.
  • electromagnetic contactors that are attracted and connected to the current path. Even if such an electromagnetic contactor is used, the present invention is established.
  • the third electromagnetic contactor 253 connected in series with the first electromagnetic contactor 251 is connected on the first current path 257a, and connected in series with the second electromagnetic contactor 252 on the second current path 257b.
  • the case where the 4th electromagnetic contactor 254 to be connected was demonstrated.
  • both the first current path 257a and the second current path 257b include two series electromagnetic contactors. It is only necessary to provide two in-line magnetic contactors on at least one of the current paths 257.
  • the control unit 270 controls the third electromagnetic contactor 253 or the normal electromagnetic signal when the emergency stop switch is turned off, the stop signal from the master storage battery management unit 220, and the signal suggesting an abnormality of the storage battery unit 210. Opening / closing control of the fourth electromagnetic contactor 254 is executed, and the charge / discharge control of the storage battery unit 210 is switched between cutoff and energization. As described above, if the purpose of the charge / discharge control of the storage battery unit 210 is to be used, the current path 257 may only be disconnected in at least one of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254.
  • FIG. 6 is a diagram schematically illustrating a circuit configuration of a switch module 250 according to a third modification of the embodiment.
  • the example shown in FIG. 6 differs from the example shown in FIG. 5 in that the fourth electromagnetic contactor 254 is not connected on the second current path 257b, but the other configurations are the same.
  • a third electromagnetic contactor 253 is connected in series to the first electromagnetic contactor 251 on the first current path 257a.
  • no electromagnetic contactor is connected in series to the second electromagnetic contactor 252 on the second current path 257b.
  • the control unit 270 includes a third electromagnetic contactor in a normal state in which a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal suggesting an abnormality of the storage battery unit 210 are not detected.
  • the charging / discharging of the storage battery unit 210 is controlled by controlling the opening and closing of the H.253. Further, when a signal indicating an abnormality of the storage battery unit 210 is detected, if the first current path 257a cannot be blocked due to contact welding with the first electromagnetic contactor 251, the third electromagnetic contactor 253 In response, a disconnection signal is output.
  • FIG. 6 is a diagram illustrating an example in which the first electromagnetic contactor 251 and the third electromagnetic contactor 253 are connected in series on the first current path 257a.
  • an electromagnetic contactor may be connected in series to the second electromagnetic contactor 252 on the second current path 257b, and no electromagnetic contactor may be connected in series to the first electromagnetic contactor 251.
  • the invention according to the present embodiment may be specified by the items described below.
  • (Item 1) An electromagnetic contactor disposed on a current path connectable to the storage battery and electrically connecting or disconnecting the current path; A controller for controlling the operation of the electromagnetic contactor, The controller is (1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. , (2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path; A switching device characterized by that.
  • the control unit outputs the disconnection signal when detecting a signal due to turning off an emergency stop switch, a stop signal from the master storage battery management unit 220, or a signal suggesting an abnormality of the storage battery.
  • Switching device (Item 3) 3. The switching device according to item 1 or 2, wherein the electromagnetic contactor is configured by connecting two electromagnetic contactors having different polarities in parallel.
  • the current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery, The said electromagnetic contactor is provided with the 1st electromagnetic contactor arrange
  • the switching device according to any one of 1 to 3.
  • the current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
  • the electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
  • the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, 5.
  • the switching device according to any one of items 1 to 4, wherein a cutting signal is output to the magnetic contactor.
  • Signals that indicate abnormalities in the storage battery are signals that indicate overdischarge of the storage battery, signals that indicate overcharge of the storage battery, signals regarding the temperature of the storage battery, signals that indicate that the storage battery is overvoltage, and current that flows through the current path 6.
  • the switching device according to any one of items 2 to 5, including at least one of signals indicating that is an overcurrent.
  • a storage battery A current path connectable to the storage battery; An electromagnetic contactor disposed on the current path and electrically connecting or disconnecting the current path; A controller for controlling the operation of the electromagnetic contactor, The controller is (1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. , (2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path; A storage battery system characterized by that.
  • the control unit outputs the disconnection signal when detecting a signal due to turning off an emergency stop switch, a stop signal from the master storage battery management unit 220, or a signal suggesting an abnormality of the storage battery.
  • Storage battery system. (Item 10)
  • the current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery, Item 8 is characterized in that the electromagnetic contactor comprises a first electromagnetic contactor disposed on the first current path and a second electromagnetic contactor disposed on the second current path. Or the storage battery system of 9.
  • the current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
  • the electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
  • the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, 11.
  • the storage battery system according to any one of items 8 to 10, wherein a cutting signal is output to the magnetic contactor.
  • the present invention can be used for a switching device that opens and closes a current path connected to a storage battery.

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

Abstract

In a switching device, an electromagnetic contactor is disposed on a current path (257) capable of being connected to a storage battery unit (210) and electrically connect and disconnect the current path (257). A control unit (270) operates as follows: (1) when outputting, to the electromagnetic contactor, a disconnection signal for instructing the electromagnetic contactor to disconnect the current path (257) when the electromagnetic contactor connects the current path (257), the control unit (270) outputs the disconnection signal while being activated; (2) when the electromagnetic contactor disconnects the current path (257), the control unit (270) is restarted before outputting, to the electromagnetic contactor, a connection signal for instructing the electromagnetic contactor to connect the current path (257).

Description

スイッチング装置および蓄電池システムSwitching device and storage battery system
　本発明は、蓄電池と接続する電流経路を開閉するスイッチング装置および蓄電池システムに関する。 The present invention relates to a switching device and a storage battery system for opening and closing a current path connected to a storage battery.
　蓄電池と系統電源とを負荷に並列に接続し、系統電源の停電時に備えて負荷で消費される電力のバックアップとして蓄電池を用いる技術が開発されている。このような技術の中には、大容量および大出力を要するシステムのバックアップ電源として、多数の蓄電池を含む蓄電池システムを備えるものも存在する。このような蓄電池システムにおいては、多数の蓄電池を設置して運用されるが、このとき複数の蓄電池を並列に接続してひとつの電池群を構成し、さらに電池群を直列に接続することにより、大容量および大出力を実現する場合がある。 A technology has been developed in which a storage battery and a system power supply are connected in parallel to a load, and the storage battery is used as a backup of power consumed by the load in case of a power failure of the system power supply. Some of such technologies include a storage battery system including a large number of storage batteries as a backup power source for a system that requires a large capacity and a large output. In such a storage battery system, a large number of storage batteries are installed and operated.At this time, a plurality of storage batteries are connected in parallel to form one battery group, and further by connecting the battery groups in series, Large capacity and high output may be realized.
特開２０１３－７０４４１号公報JP 2013-70441 A 特開２０１３－１１８７８６号公報JP 2013-118786 A
　一般に蓄電システムにおいて蓄電池の出力を遮断するためにブレーカが用いられる。しかしながら、上述のような大容量および大出力の電力の遮断には、第三者機関による認証されたブレーカが存在しない場合や、高コストとなる場合もあり得る。 Generally, a breaker is used to shut off the output of a storage battery in a power storage system. However, the interruption of the large-capacity and high-output power as described above may be a case where there is no circuit breaker certified by a third party or a high cost.
　本発明はこうした状況に鑑みなされたものであり、その目的は、電力を遮断するためのブレーカの代替技術を提供することにある。 The present invention has been made in view of such a situation, and an object thereof is to provide an alternative technique for a breaker for cutting off electric power.
　上記課題を解決するために、本発明のある態様のスイッチング装置は、蓄電池と接続可能な電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、電磁接触器の動作を制御する制御部とを備える。制御部は、（１）電磁接触器が電流経路を接続している場合において電流経路を切断させることを指示するための切断信号を電磁接触器に出力するときは、起動したまま切断信号を出力し、（２）電磁接触器が電流経路を切断している場合において電流経路を接続させることを指示するための接続信号を電磁接触器に出力する前に再起動する。 In order to solve the above problems, a switching device according to an aspect of the present invention is arranged on a current path that can be connected to a storage battery, electrically connected to or disconnected from the current path, and operation of the electromagnetic contactor And a control unit for controlling. When the control unit outputs (1) a disconnection signal for instructing to disconnect the current path when the magnetic contactor is connected to the current path, the control unit outputs the disconnection signal while being activated. (2) When the magnetic contactor cuts off the current path, the magnetic contactor is restarted before outputting a connection signal for instructing connection of the current path.
　上記課題を解決するために、本発明のある態様の蓄電池システムは、蓄電池と、蓄電池と接続可能な電流経路と、電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、電磁接触器の動作を制御する制御部とを備える。制御部は、（１）前記電磁接触器が電流経路を接続している場合において前記電流経路を切断させることを指示するための切断信号を前記電磁接触器に出力するときは、起動したまま切断信号を出力し、（２）前記電磁接触器が前記電流経路を切断している場合において前記電流経路を接続させることを指示するための接続信号を前記電磁接触器に出力する前に再起動する。 In order to solve the above problems, a storage battery system according to an aspect of the present invention includes a storage battery, a current path connectable to the storage battery, and an electromagnetic contactor that is disposed on the current path and electrically connects or disconnects the current path. And a control unit for controlling the operation of the electromagnetic contactor. The control unit (1) when the electromagnetic contactor is connected to the current path, when the disconnection signal for instructing to disconnect the current path is output to the electromagnetic contactor, the control unit is disconnected while being activated. (2) when the electromagnetic contactor is cutting the current path, restart the connection before outputting a connection signal to the magnetic contactor to instruct the connection of the current path. .
　本発明によれば、電力を遮断するためのブレーカの代替技術を提供することができる。 According to the present invention, it is possible to provide a breaker alternative technology for cutting off power.
実施の形態に係る配電システムを模式的に示す図である。1 is a diagram schematically showing a power distribution system according to an embodiment. 実施の形態に係る蓄電池システムの外観の一例を模式的に示す図である。It is a figure which shows typically an example of the external appearance of the storage battery system which concerns on embodiment. 実施の形態に係る蓄電池収容棚の外観を示す斜視図である。It is a perspective view which shows the external appearance of the storage battery storage shelf which concerns on embodiment. 蓄電池を収容した状態の蓄電池収容棚を示す図である。It is a figure which shows the storage battery accommodation shelf of the state which accommodated the storage battery. 実施の形態に係るスイッチモジュールの回路構成を模式的に示す図である。It is a figure which shows typically the circuit structure of the switch module which concerns on embodiment. 実施の形態の変形例に係るスイッチモジュールの回路構成を模式的に示す図である。It is a figure which shows typically the circuit structure of the switch module which concerns on the modification of embodiment.
　図１は、本発明の実施の形態に係る配電システム１００を模式的に示す図である。実施の形態に係る配電システム１００は、複数の蓄電池を含む蓄電池コンテナ２００、再生可能エネルギーの発電装置である太陽電池３００、双方向パワーコンディショナ４００、系統電源５００、負荷６００を含む。 FIG. 1 is a diagram schematically showing a power distribution system 100 according to an embodiment of the present invention. The power distribution system 100 according to the embodiment includes a storage battery container 200 including a plurality of storage batteries, a solar battery 300 that is a power generator for renewable energy, a bidirectional power conditioner 400, a system power supply 500, and a load 600.
　系統電源５００は、電力会社からの電力を供給するための交流電源である。太陽電池３００は、光起電力効果を利用し、光エネルギーを直接電力に変換する発電装置である。太陽電池３００として、シリコン太陽電池、さまざまな化合物半導体などを素材にした太陽電池、色素増感型（有機太陽電池）等が使用される。なお、配電システム１００は、太陽電池３００に代えて、あるいはこれに加えて、図示しない燃料電池や風力発電、マイクロ水力発電を備えてもよい。風力発電やマイクロ水力発電が発電する電力は一般に交流発電であるため、配電システム１００が風力発電を備える場合、双方向パワーコンディショナ４００に出力する前にＡＣ／ＤＣコンバータ（図示せず）を設置する。 System power supply 500 is an AC power supply for supplying power from an electric power company. The solar cell 300 is a power generation device that directly converts light energy into electric power using the photovoltaic effect. As the solar cell 300, a silicon solar cell, a solar cell made of various compound semiconductors, a dye-sensitized type (organic solar cell), or the like is used. Note that the power distribution system 100 may include a fuel cell, wind power generation, and micro hydropower generation (not shown) instead of or in addition to the solar cell 300. Since the power generated by wind power generation or micro hydropower generation is generally AC power generation, when the power distribution system 100 includes wind power generation, an AC / DC converter (not shown) is installed before output to the bidirectional power conditioner 400. To do.
　蓄電池コンテナ２００は、所定数の蓄電池を含む蓄電池ユニット２１０を複数備える。図１に示す例では、第１蓄電池ユニット２１０ａ、第２蓄電池ユニット２１０ｂ、第３蓄電池ユニット２１０ｃ、第４蓄電池ユニット２１０ｄまでの４つの蓄電池ユニット（以下、特に区別する場合を除き、単に「蓄電池ユニット２１０」と総称する。）が示されている。各蓄電池ユニット２１０は、それぞれ蓄電池を管理する第１蓄電池管理部２６０ａ、第２蓄電池管理部２６０ｂ、第３蓄電池管理部２６０ｃ、および第４蓄電池管理部２６０ｄ（以下、特に区別する場合を除き、単に「蓄電池管理部２６０」と総称する。）を備える。蓄電池コンテナ２００はまた、各蓄電池管理部２６０を統括的に制御するためのマスター蓄電池管理部２２０を備える。 The storage battery container 200 includes a plurality of storage battery units 210 including a predetermined number of storage batteries. In the example shown in FIG. 1, there are four storage battery units up to the first storage battery unit 210a, the second storage battery unit 210b, the third storage battery unit 210c, and the fourth storage battery unit 210d. 210 "). Each storage battery unit 210 includes a first storage battery management unit 260a, a second storage battery management unit 260b, a third storage battery management unit 260c, and a fourth storage battery management unit 260d (hereinafter, unless otherwise specifically distinguished, for managing storage batteries, respectively). (Collectively referred to as “storage battery management unit 260”). The storage battery container 200 also includes a master storage battery management unit 220 for controlling each storage battery management unit 260 in an integrated manner.
　蓄電池コンテナ２００はさらに、各蓄電池ユニット２１０と双方向パワーコンディショナ４００との間の電流経路をそれぞれ遮断可能な第１スイッチモジュール２５０ａ、第２スイッチモジュール２５０ｂ、第３スイッチモジュール２５０ｃ、および第４スイッチモジュール２５０ｄを備える。以下、特に区別する場合を除き、これらを「スイッチモジュール２５０」と総称する。 The storage battery container 200 further includes a first switch module 250a, a second switch module 250b, a third switch module 250c, and a fourth switch that can cut off current paths between the storage battery units 210 and the bidirectional power conditioner 400, respectively. A module 250d is provided. Hereinafter, these are collectively referred to as “switch module 250” unless otherwise specified.
　実施の形態に係る蓄電池管理部２６０は、蓄電池ユニット２１０を管理する。ひとつの蓄電池ユニット２１０、スイッチモジュール２５０、および蓄電池管理部２６０を単位として、ひとつの蓄電池システムを構成する。蓄電池システムの詳細は後述する。 The storage battery management unit 260 according to the embodiment manages the storage battery unit 210. One storage battery system is configured with one storage battery unit 210, switch module 250, and storage battery management unit 260 as a unit. Details of the storage battery system will be described later.
　双方向パワーコンディショナ４００は、一端において蓄電池コンテナ２００および太陽電池３００と接続するとともに、他端において系統電源５００と接続する。双方向パワーコンディショナ４００は双方向インバータ４１０を備え、制御部４２０の制御の下、太陽電池３００が発電した電力、または蓄電池コンテナ２００が放電した電力である直流電力を交流電力に変換するとともに、系統電源５００からの交流電力を直流電力に変換する。 Bidirectional power conditioner 400 is connected to storage battery container 200 and solar battery 300 at one end and to system power supply 500 at the other end. The bi-directional power conditioner 400 includes a bi-directional inverter 410, and converts DC power generated by the solar battery 300 or discharged from the storage battery container 200 into AC power under the control of the control unit 420, AC power from the system power supply 500 is converted into DC power.
　第１ＤＣ／ＤＣコンバータ４３０ａは、スイッチモジュール２５０ａと双方向パワーコンディショナ４００との間の導電経路中に設置される。また、第２ＤＣ／ＤＣコンバータ４３０ｂは、第２スイッチモジュール２５０ｂと双方向パワーコンディショナ４００との間の導電経路中に設置される。第３ＤＣ／ＤＣコンバータ４３０ｃおよび第４ＤＣ／ＤＣコンバータ４３０ｄも同様に、それぞれ、第３スイッチモジュール２５０ｃと双方向パワーコンディショナ４００、および第４スイッチモジュール２５０ｄと双方向パワーコンディショナ４００との間に設置される。以下、特に区別する場合を除き、これらのＤＣ／ＤＣコンバータを「ＤＣ／ＤＣコンバータ４３０」と総称する。ＤＣ／ＤＣコンバータ４３０は、双方向パワーコンディショナで変換された直流電力を昇圧あるいは降圧し、複数の蓄電池に充放電を行わせる。 The first DC / DC converter 430a is installed in a conductive path between the switch module 250a and the bidirectional power conditioner 400. The second DC / DC converter 430b is installed in a conductive path between the second switch module 250b and the bidirectional power conditioner 400. Similarly, the third DC / DC converter 430c and the fourth DC / DC converter 430d are installed between the third switch module 250c and the bidirectional power conditioner 400, and between the fourth switch module 250d and the bidirectional power conditioner 400, respectively. Is done. Hereinafter, these DC / DC converters are collectively referred to as “DC / DC converters 430” unless otherwise specified. The DC / DC converter 430 boosts or steps down the DC power converted by the bidirectional power conditioner, and charges / discharges the plurality of storage batteries.
　双方向パワーコンディショナ４００はまた、太陽電池用ＤＣ／ＤＣコンバータ４４０を備え、太陽電池３００が発電した電力を変換して双方向インバータ４１０に出力する。双方向パワーコンディショナ４００を用いることにより、各蓄電池ユニット２１０の電力や太陽電池３００が発電した電力を系統電源５００と連携して負荷６００に供給することができる。また、系統電源５００が停電した場合には、各蓄電池ユニット２１０の電力や太陽電池３００が発電した電力を、系統電源５００のバックアップとして負荷６００に供給することができる。 The bidirectional power conditioner 400 is also provided with a solar cell DC / DC converter 440, converts the electric power generated by the solar cell 300, and outputs it to the bidirectional inverter 410. By using the bidirectional power conditioner 400, the electric power of each storage battery unit 210 and the electric power generated by the solar battery 300 can be supplied to the load 600 in cooperation with the system power supply 500. Further, when the system power supply 500 fails, the power of each storage battery unit 210 and the power generated by the solar battery 300 can be supplied to the load 600 as a backup of the system power supply 500.
　図２は、実施の形態に係る蓄電池システム２４０の外観の一例を模式的に示す図である。蓄電池システム２４０は、蓄電池ユニット２１０、スイッチモジュール２５０、および蓄電池管理部２６０を備える。蓄電池ユニット２１０は、７０個の蓄電池パック２１２を含む。各蓄電池パック２１２は、充電可能な２次電池である。蓄電池パック２１２は、例えばリチウムイオン２次電池によって実現される。 FIG. 2 is a diagram schematically showing an example of the appearance of the storage battery system 240 according to the embodiment. The storage battery system 240 includes a storage battery unit 210, a switch module 250, and a storage battery management unit 260. Storage battery unit 210 includes 70 storage battery packs 212. Each storage battery pack 212 is a rechargeable secondary battery. The storage battery pack 212 is realized by, for example, a lithium ion secondary battery.
　蓄電池パック２１２は、双方向パワーコンディショナ４００によって直流電力に変換された、系統電源５００の電力によって充電される。蓄電池管理部２６０は、各蓄電池パック２１２の充電状態（State Of Charge；ＳＯＣ）や温度、電圧、電流等、蓄電池パック２１２の様々な物理量を測定するとともに、特定した物理量を双方向パワーコンディショナ４００に提供する。蓄電池管理部２６０は、蓄電池パック２１２を冷やすためのファンを制御して蓄電池パック２１２を冷やしたりする等の制御も行う。 The storage battery pack 212 is charged by the electric power of the system power source 500 converted into DC power by the bidirectional power conditioner 400. The storage battery management unit 260 measures various physical quantities of the storage battery pack 212, such as the state of charge (State Of Charge; SOC), temperature, voltage, current, etc. of each storage battery pack 212, and the specified physical quantity is the bidirectional power conditioner 400. To provide. The storage battery management unit 260 also performs control such as cooling the storage battery pack 212 by controlling a fan for cooling the storage battery pack 212.
　図２において、符号２１２で示す矩形がひとつの蓄電池パック２１２である。図示はしないが、実施の形態における蓄電池パック２１２は、円筒型電池を１３直２４並列に接続された構成である。煩雑となることを避けるために全てには符号を付していないが、符号２１２で示す矩形と同様の矩形は全て蓄電池パック２１２を示している。図２に示すように、蓄電池ユニット２１０は、第１蓄電池収容棚２１４ａから第５蓄電池収容棚２１４ｅまでの５つの蓄電池収容棚２１４を備える。各蓄電池収容棚２１４は、５つの蓄電池パック２１２を収容可能な収容空間を、鉛直方向に３つ備える。したがって、蓄電池収容棚２１４はひとつで最大５×３＝１５個の蓄電池パック２１２を収容できる。ここで実施の形態に係る蓄電池ユニット２１０は、ひとつの蓄電池収容棚２１４が備えるひとつの収容空間に、蓄電池パック２１２に替えてスイッチモジュール２５０および蓄電池管理部２６０を収容している。このため、全体として１４×５＝７０個の蓄電池パック２１２を収容する。 In FIG. 2, a rectangle indicated by reference numeral 212 is one storage battery pack 212. Although not shown, the storage battery pack 212 in the embodiment has a configuration in which cylindrical batteries are connected in 13 series and 24 parallel configurations. In order to avoid complication, not all symbols are attached, but all the rectangles similar to the rectangles denoted by the symbol 212 indicate the storage battery pack 212. As shown in FIG. 2, the storage battery unit 210 includes five storage battery storage shelves 214 from the first storage battery storage shelf 214a to the fifth storage battery storage shelf 214e. Each storage battery storage shelf 214 includes three storage spaces that can store five storage battery packs 212 in the vertical direction. Therefore, one storage battery storage shelf 214 can store a maximum of 5 × 3 = 15 storage battery packs 212. Here, the storage battery unit 210 according to the embodiment accommodates the switch module 250 and the storage battery management unit 260 in place of the storage battery pack 212 in one storage space provided in one storage battery storage shelf 214. For this reason, 14 × 5 = 70 storage battery packs 212 are accommodated as a whole.
　実施の形態に係る蓄電池パック２１２は、ひとつあたり１．８ｋＷｈの電力量である。このため、蓄電池ユニット２１０の全体の電力量は、１．８ｋＷｈ×７０＝１２６ｋＷｈとなる。蓄電池コンテナ２００は４つの蓄電池ユニット２１０を備えるため、実施の形態に係る配電システム１００は全体として１２６ｋＷｈ×４＝５０４ｋＷｈの電力量となる。なお、太陽電池３００の発電量は２５０ｋＷである。 The storage battery pack 212 according to the embodiment has a power amount of 1.8 kWh per one. For this reason, the total electric energy of the storage battery unit 210 is 1.8 kWh × 70 = 126 kWh. Since the storage battery container 200 includes the four storage battery units 210, the power distribution system 100 according to the embodiment has a power amount of 126 kWh × 4 = 504 kWh as a whole. In addition, the electric power generation amount of the solar cell 300 is 250 kW.
　図３は、実施の形態に係る蓄電池収容棚２１４の外観を示す斜視図であり、蓄電池パック２１２または蓄電池管理部２６０を収容していない空の状態の蓄電池収容棚２１４を図示している。図３に示すように、蓄電池収容棚２１４は、ひとつの収容空間と別の収容空間との間に、収容空間を区分けするための第１仕切部２１６ａ、第２仕切部２１６ｂおよび第３仕切部２１６ｃを備える。 FIG. 3 is a perspective view showing an appearance of the storage battery storage shelf 214 according to the embodiment, and illustrates the storage battery storage shelf 214 in an empty state in which the storage battery pack 212 or the storage battery management unit 260 is not stored. As shown in FIG. 3, the storage battery storage shelf 214 includes a first partition 216a, a second partition 216b, and a third partition for partitioning the storage space between one storage space and another storage space. 216c.
　蓄電池収容棚２１４の各収容空間は、蓄電池パック２１２をＹ方向に５つ並べて収容することができる。図４は、蓄電池パック２１２を収容した状態の蓄電池収容棚２１４を示す図である。図４に示すように、蓄電池パック２１２は収容空間にちょうど収まるように収容空間のＹ方向の長さが設定されている。 Each storage space of the storage battery storage shelf 214 can store five storage battery packs 212 side by side in the Y direction. FIG. 4 is a diagram showing the storage battery storage shelf 214 in a state in which the storage battery pack 212 is stored. As shown in FIG. 4, the length of the storage space in the Y direction is set so that the storage battery pack 212 just fits in the storage space.
　以上説明したように、実施の形態に係る蓄電池ユニット２１０は１２６ｋＷｈの電力量があり、出力も大きい。このため、蓄電池ユニット２１０の出力に適合したブレーカの入手が難しかったり、コストアップとなったりすることも想定される。なお、ブレーカ（遮断器；Circuit Breaker）とは、電力回路に短絡等が生じることで過大電流が流れた場合に、その過大電流を遮断することで電力回路を保護するものをいう。このため実施の形態に係るスイッチモジュール２５０は、ブレーカの機能を電磁接触器を制御することで代替する。以下、実施の形態に係るスイッチモジュール２５０について説明する。 As described above, the storage battery unit 210 according to the embodiment has a power amount of 126 kWh and a large output. For this reason, it is assumed that it is difficult to obtain a breaker suitable for the output of the storage battery unit 210 or that the cost is increased. Note that a breaker (Circuit breaker) means a circuit that protects a power circuit by interrupting the excessive current when a short circuit or the like occurs in the power circuit. Therefore, the switch module 250 according to the embodiment replaces the function of the breaker by controlling the magnetic contactor. Hereinafter, the switch module 250 according to the embodiment will be described.
　図５は、実施の形態に係るスイッチモジュール２５０の回路構成を模式的に示す図である。スイッチモジュール２５０は、蓄電池ユニット２１０の正極端子と接続する第１電流経路２５７ａと、負極端子と接続する第２電流経路２５７ｂとを含む電流経路（以下、第１電流経路２５７ａと第２電流経路２５７ｂとを特に区別する場合を除き、単に「電流経路２５７」と総称する。）を備える。以下図５を参照しながら、スイッチモジュール２５０内の電機部品の接続関係について説明する。 FIG. 5 is a diagram schematically showing a circuit configuration of the switch module 250 according to the embodiment. The switch module 250 includes a current path including a first current path 257a connected to the positive terminal of the storage battery unit 210 and a second current path 257b connected to the negative terminal (hereinafter, the first current path 257a and the second current path 257b). Are collectively referred to as “current path 257” unless otherwise specifically distinguished. Hereinafter, with reference to FIG. 5, the connection relationship of the electrical components in the switch module 250 will be described.
　第１電流経路２５７ａ上には第１電流経路２５７ａを電気的に接続または切断する第１電磁接触器２５１が接続される。同様に、第２電流経路２５７ｂ上には第１電流経路２５７ａを電気的に接続または切断する第２電磁接触器２５２が接続される。第２電流経路２５７ｂは接地されている。 The first electromagnetic contactor 251 that electrically connects or disconnects the first current path 257a is connected to the first current path 257a. Similarly, a second electromagnetic contactor 252 that electrically connects or disconnects the first current path 257a is connected to the second current path 257b. The second current path 257b is grounded.
　ここで電磁接触器（マグネットコンタクタ；Electromagnetic Contactor）は、電磁石の動作を利用して電流経路を開閉する電機部品のことを言う。より具体的に、電磁接触器は、通常状態ではバネ等の付勢力によって接触子が電流経路を接続しているが、電磁石に電力が供給されると付勢力よりも大きな磁力によって接触子が電磁石に引き寄せられ、電流経路が切断される。電磁接触器は電磁石への通電の有無で電流経路を開閉できるため、例えば遠隔操作での電気回路の開閉や自動開閉等に利用される。 Here, an electromagnetic contactor is an electrical component that opens and closes a current path using the operation of an electromagnet. More specifically, in an electromagnetic contactor, in a normal state, the contact is connected to the current path by an urging force such as a spring, but when electric power is supplied to the electromagnet, the contact is electromagnetized by a magnetic force larger than the urging force. The current path is cut off. Since an electromagnetic contactor can open and close a current path with or without energization of an electromagnet, it is used for, for example, opening and closing of an electric circuit or automatic opening and closing of a remote operation.
　第１電流経路２５７ａ上にはさらに、第１電磁接触器２５１と直列に接続する第３電磁接触器２５３が接続されている。同様に、第２電流経路２５７ｂ上にはさらに、第２電磁接触器２５２と直列に接続する第４電磁接触器２５４が接続されている。 A third electromagnetic contactor 253 connected in series with the first electromagnetic contactor 251 is further connected on the first current path 257a. Similarly, a fourth electromagnetic contactor 254 connected in series with the second electromagnetic contactor 252 is further connected on the second current path 257b.
　第１電流経路２５７ａ上において、第１電磁接触器２５１と第３電磁接触器２５３との間には第１ノードＮ１が存在する。また第２電流経路２５７ｂ上において、第２電磁接触器２５２と第４電磁接触器２５４との間には第２ノードＮ２が存在する。第１ノードＮ１と第２ノードＮ２とを結ぶ経路上に、電圧センサ２５５が接続されている。 On the first current path 257a, the first node N1 exists between the first electromagnetic contactor 251 and the third electromagnetic contactor 253. Further, on the second current path 257b, a second node N2 exists between the second electromagnetic contactor 252 and the fourth electromagnetic contactor 254. A voltage sensor 255 is connected on a path connecting the first node N1 and the second node N2.
　第１電流経路２５７ａ上において、第３電磁接触器２５３と蓄電池ユニット２１０の正極端子との間に第３ノードＮ３が存在する。また第２電流経路２５７ｂ上において、第４電磁接触器２５４と蓄電池ユニット２１０の負極端子との間に第４ノードＮ４が存在する。第４ノードＮ４と蓄電池ユニット２１０の負極端子との間には、第２電流経路２５７ｂを流れる電流を計測するとともに、第３ノードＮ３と第４ノードＮ４との間の電圧を計測する電流電圧センサ２５６が接続されている。 On the first current path 257a, a third node N3 exists between the third electromagnetic contactor 253 and the positive terminal of the storage battery unit 210. A fourth node N4 exists between the fourth electromagnetic contactor 254 and the negative terminal of the storage battery unit 210 on the second current path 257b. A current-voltage sensor that measures a current flowing through the second current path 257b and measures a voltage between the third node N3 and the fourth node N4 between the fourth node N4 and the negative terminal of the storage battery unit 210. 256 is connected.
　第１電流経路２５７ａ上において、第１電磁接触器２５１と双方向パワーコンディショナ４００との間には第１ヒューズ２５８ａが接続されている。また第２電流経路２５７ｂ上において、電流電圧センサ２５６と蓄電池ユニット２１０の負極端子との間には第２ヒューズ２５８ｂが接続されている。 The first fuse 258a is connected between the first electromagnetic contactor 251 and the bidirectional power conditioner 400 on the first current path 257a. A second fuse 258b is connected between the current / voltage sensor 256 and the negative terminal of the storage battery unit 210 on the second current path 257b.
　以上、スイッチモジュール２５０内の電機部品の接続関係について説明した。続いて、スイッチモジュール２５０の動作について説明する。 In the above, the connection relation of the electrical components in the switch module 250 has been described. Next, the operation of the switch module 250 will be described.
　スイッチモジュール２５０は、各電磁接触器を開閉することで、蓄電池ユニット２１０と双方向パワーコンディショナ４００との間の電流経路を開閉可能である。実施の形態に係るスイッチモジュール２５０において、スイッチモジュール２５０内の各電磁接触器の開閉は、基本的に蓄電池管理部２６０の制御部２７０によって制御される。したがって、スイッチモジュール２５０と蓄電池管理部２６０とによって、蓄電池ユニット２１０の接続を制御するスイッチング装置を構成する。 The switch module 250 can open and close a current path between the storage battery unit 210 and the bidirectional power conditioner 400 by opening and closing each electromagnetic contactor. In the switch module 250 according to the embodiment, the opening / closing of each electromagnetic contactor in the switch module 250 is basically controlled by the control unit 270 of the storage battery management unit 260. Therefore, the switch module 250 and the storage battery management unit 260 constitute a switching device that controls connection of the storage battery unit 210.
　なお、スイッチモジュール２５０内の各電磁接触器の開閉を制御する制御部は蓄電池管理部２６０内にある場合に限られない。例えばスイッチモジュール２５０内にあってもよいし、マスター蓄電池管理部２２０内にあってもよい。前者の場合、スイッチモジュール２５０は単独で蓄電池ユニット２１０の接続を制御するスイッチング装置を構成する。後者の場合、スイッチモジュール２５０とマスター蓄電池管理部２２０とがスイッチング装置を構成する。この他、電磁接触器の開閉を制御する制御部は双方向パワーコンディショナ４００中にあってもよいし、単独で存在してもよい。 In addition, the control part which controls opening and closing of each electromagnetic contactor in the switch module 250 is not restricted to the case in the storage battery management part 260. For example, it may be in the switch module 250 or in the master storage battery management unit 220. In the former case, the switch module 250 alone constitutes a switching device that controls connection of the storage battery unit 210. In the latter case, the switch module 250 and the master storage battery management unit 220 constitute a switching device. In addition, the control part which controls opening and closing of an electromagnetic contactor may be in the bidirectional | two-way power conditioner 400, and may exist independently.
　ブレーカは一般に、電流経路に過大電流が流れると自動的にブレーカトリップして電流経路を遮断する。一方、ひとたびブレーカトリップすると自動で復帰することはなく、ユーザが手動で復帰する必要がある。そこで実施の形態に係る制御部２７０は、電磁接触器が電流経路２５７を切断している場合において電流経路２５７を接続させることを指示するための信号（以下、「接続信号」という。）を電磁接触器に出力する前に再起動する。言い換えると、制御部２７０は、再起動した後でなければ、接続信号を電磁接触器に出力しないように構成されている。なお、接続信号の出力とは、具体的には電磁接触器内の電磁石に電力を供給させるための信号である。この結果、電磁接触器内の接触子を電流経路から離れ、電流経路が遮断される。 ∙ In general, when an excessive current flows in the current path, the breaker automatically trips and breaks the current path. On the other hand, once the breaker trips, it does not return automatically, and the user needs to return manually. Therefore, the control unit 270 according to the embodiment electromagnetically transmits a signal (hereinafter referred to as “connection signal”) for instructing to connect the current path 257 when the electromagnetic contactor cuts the current path 257. Restart before output to contactor. In other words, the control unit 270 is configured not to output a connection signal to the electromagnetic contactor unless it has been restarted. The output of the connection signal is specifically a signal for supplying electric power to the electromagnet in the electromagnetic contactor. As a result, the contact in the electromagnetic contactor is separated from the current path, and the current path is interrupted.
　制御部２７０は、例えばマイコン等の演算器を用いて実現されており、再起動にはユーザの明示的な指示を要する。したがって、制御部２７０が接続信号を電磁接触器に出力するためにはユーザの明示的な指示を要することになる。これは、ひとたびブレーカトリップしたブレーカはユーザが手動で復帰する必要があることと対応する。 The control unit 270 is realized by using an arithmetic unit such as a microcomputer, for example, and requires an explicit instruction from the user for restarting. Therefore, an explicit instruction from the user is required for the control unit 270 to output a connection signal to the electromagnetic contactor. This corresponds to the fact that the breaker once tripped must be manually restored by the user.
　一方、制御部２７０は、第１電磁接触器２５１および第２電磁接触器２５２が電流経路２５７を接続している場合において電流経路２５７を切断させることを指示するための信号（以下、「切断信号」という。）を各電磁接触器に出力するときは、再起動を要さず起動したまま切断信号を出力する。これはブレーカが自動でブレーカトリップすることと対応する。 On the other hand, the control unit 270 provides a signal for instructing to disconnect the current path 257 when the first electromagnetic contactor 251 and the second electromagnetic contactor 252 are connected to the current path 257 (hereinafter referred to as “disconnection signal”). ")" Is output to each electromagnetic contactor, a disconnection signal is output without being restarted. This corresponds to the breaker tripping automatically.
　なお、制御部２７０は再起動をすることなく接続信号を出力することも技術的に可能である。しかしながら、実施の形態に係るスイッチモジュール２５０は、制御部２７０と第１電磁接触器２５１および第２電磁接触器２５２との組み合わせでブレーカの代替手段を構成するために、再起動した後でなければ、制御部２７０は接続信号を出力しないように構成されている。ここで、他の実施の形態として、ユーザは遠隔操作によって制御部２７０を再起動させることもできる。したがって、他の実施の形態においては、ブレーカの場合とは異なり、制御部２７０が設置されている場所にユーザが実際に赴くことなく、遮断された電流経路を復帰させることができる。 Note that it is technically possible for the control unit 270 to output a connection signal without restarting. However, the switch module 250 according to the embodiment must be after restarting in order to configure a breaker alternative means by combining the controller 270 with the first electromagnetic contactor 251 and the second electromagnetic contactor 252. The control unit 270 is configured not to output a connection signal. Here, as another embodiment, the user can also restart the control unit 270 by remote operation. Therefore, in another embodiment, unlike the case of the breaker, the interrupted current path can be restored without actually going to the place where the control unit 270 is installed.
　制御部２７０は、蓄電池ユニット２１０の異常を示唆する信号を検知した場合、切断信号を出力する。ここで「異常を示唆する信号」とは、蓄電池ユニット２１０を構成する各々の蓄電池パック２１２からの緊急停止信号であり、例えば蓄電池パック２１２の過放電を示唆する信号、蓄電池パック２１２の過充電を示唆する信号、蓄電池パック２１２の温度に関する信号、蓄電池パック２１２が過電圧であることを示唆する信号、および電流経路２５７を流れる電流が過電流であることを示唆する信号である。
　また、「異常を示唆する信号」としては、この他、蓄電池管理部２６０に設けられた緊急停止スイッチ２８０がオフになったことで発信される信号およびマスター蓄電池管理部２２０からの停止信号等もある。 Control unit 270 outputs a disconnection signal when detecting a signal suggesting abnormality of storage battery unit 210. Here, the “signal indicating abnormality” is an emergency stop signal from each storage battery pack 212 constituting the storage battery unit 210. For example, a signal indicating overdischarge of the storage battery pack 212, an overcharge of the storage battery pack 212 is performed. These signals are a signal indicating the temperature of the storage battery pack 212, a signal indicating that the storage battery pack 212 is overvoltage, and a signal indicating that the current flowing through the current path 257 is an overcurrent.
In addition, the “signal indicating abnormality” includes a signal transmitted when the emergency stop switch 280 provided in the storage battery management unit 260 is turned off, a stop signal from the master storage battery management unit 220, and the like. is there.
　各々の蓄電池パック２１２の制御部（図示せず）は、各々の蓄電池パック２１２が過放電であるか否か、および各々の蓄電池パック２１２が過充電であるか否かを、各々の蓄電池パック２１２から取得した蓄電池の電圧や電流から算出する。より具体的に、各々の蓄電池パック２１２の制御部は算出した各々の蓄電池パック２１２の蓄電量が、過充電か否かを判定するために定められた過充電閾値以上の場合、過充電を示唆する異常信号と判定する。また各々の蓄電池パック２１２の制御部は、ＳＯＣ算出部から取得した各々の蓄電池パック２１２の蓄電量が、過放電か否かを判定するために定められた過放電閾値以下の場合、過放電を示唆する異常信号と判定する。過充電閾値や過放電閾値は各々の蓄電池パック２１２の特性等を考慮して定めればよいが、例えばそれぞれ９８％、２０％である。 The control unit (not shown) of each storage battery pack 212 determines whether each storage battery pack 212 is overdischarged and whether each storage battery pack 212 is overcharged. It is calculated from the voltage and current of the storage battery obtained from the above. More specifically, the control unit of each storage battery pack 212 suggests overcharge when the calculated storage amount of each storage battery pack 212 is equal to or greater than an overcharge threshold determined to determine whether or not it is overcharge. Is determined to be an abnormal signal. In addition, the control unit of each storage battery pack 212 performs overdischarge when the amount of power stored in each storage battery pack 212 obtained from the SOC calculation unit is equal to or less than an overdischarge threshold determined to determine whether or not it is overdischarge. It is determined as an abnormal signal to suggest. The overcharge threshold and the overdischarge threshold may be determined in consideration of the characteristics of each storage battery pack 212 and the like, for example, 98% and 20%, respectively.
　各々の蓄電池パック２１２の制御部は、各々の蓄電池パック２１２の温度に関する信号を、各々の蓄電池パック２１２内の図示しない温度センサから取得する。より具体的に、各々の蓄電池パック２１２の制御部は、温度センサから取得した温度が高温異常か否かを判定するために定められた高温閾値温度以上の場合、高温異常を示唆する信号と判定し、低温異常か否かを判定するために定められた低温閾値温度以下の場合、低温異常を示唆する信号と判定する。 The control unit of each storage battery pack 212 acquires a signal related to the temperature of each storage battery pack 212 from a temperature sensor (not shown) in each storage battery pack 212. More specifically, the control unit of each storage battery pack 212 determines that the signal acquired from the temperature sensor is a signal indicating a high temperature abnormality when the temperature acquired from the temperature sensor is equal to or higher than a high temperature threshold temperature determined to determine whether the temperature is abnormal. When the temperature is equal to or lower than a low temperature threshold temperature determined to determine whether or not there is a low temperature abnormality, the signal is determined to indicate a low temperature abnormality.
　各々の蓄電池パック２１２の制御部は、各々の蓄電池パック２１２が過電圧であることを示唆する信号、および電流経路２５７を流れる電流が過電流であることを示唆する信号を、各々の蓄電池パック２１２内の電流電圧センサから取得する。より具体的に、各々の蓄電池パック２１２の制御部は、電流電圧センサから取得した電圧値が過電圧であるか否かを判定するために定められた過電圧閾値以上の場合、過電圧異常を示唆する信号と判定する。各々の蓄電池パック２１２の制御部は同様に、電流電圧センサから取得した電流値が過電流であるか否かを判定するために定められた過電流閾値以上の場合、過電流異常を示唆する信号と判定する。 The control unit of each storage battery pack 212 sends a signal indicating that each storage battery pack 212 is overvoltage and a signal indicating that the current flowing through the current path 257 is overcurrent in each storage battery pack 212. Obtained from the current voltage sensor. More specifically, the control unit of each storage battery pack 212 indicates a signal indicating an overvoltage abnormality when the voltage value acquired from the current voltage sensor is equal to or higher than an overvoltage threshold determined to determine whether or not the voltage value is an overvoltage. Is determined. Similarly, the control unit of each storage battery pack 212 similarly indicates a signal indicating an overcurrent abnormality when the current value acquired from the current-voltage sensor is equal to or greater than an overcurrent threshold determined to determine whether or not the current value is an overcurrent. Is determined.
　なお、高温閾値温度、低温閾値温度、過電圧閾値、および過電流閾値の具体的な値は、蓄電池パック２１２の特性等を考慮して実験により定めればよい。 It should be noted that specific values of the high temperature threshold temperature, the low temperature threshold temperature, the overvoltage threshold, and the overcurrent threshold may be determined by experiment in consideration of the characteristics of the storage battery pack 212 and the like.
　マスター蓄電池管理部２２０は、双方向パワーコンディショナ４００と通信し、双方向パワーコンディショナ４００から取得した制御信号をもとに各蓄電池管理部２６０の動作を制御する。このため、マスター蓄電池管理部２２０は、双方向パワーコンディショナ４００の動作不良または双方向パワーコンディショナ４００との間の通信経路に異常が生じることで双方向パワーコンディショナ４００と通信できなくなると、ＯＲ回路２６４を介して第１電磁接触器２５１および第２電磁接触器２５２に切断信号を出力する。これにより、蓄電池ユニット２１０と双方向パワーコンディショナ４００との間を電気的に遮断する。またユーザが緊急停止スイッチ２８０を押下すると、ＯＲ回路２６４を介して第１電磁接触器２５１および第２電磁接触器２５２に切断信号が直接出力され、蓄電池ユニット２１０と双方向パワーコンディショナ４００との間が電気的に遮断される。 The master storage battery management unit 220 communicates with the bidirectional power conditioner 400 and controls the operation of each storage battery management unit 260 based on a control signal acquired from the bidirectional power conditioner 400. For this reason, if the master storage battery management unit 220 becomes unable to communicate with the bidirectional power conditioner 400 due to malfunction of the bidirectional power conditioner 400 or an abnormality in the communication path with the bidirectional power conditioner 400, A disconnection signal is output to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 via the OR circuit 264. Thereby, between the storage battery unit 210 and the bidirectional | two-way power conditioner 400 is electrically interrupted | blocked. When the user presses the emergency stop switch 280, a disconnect signal is directly output to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 via the OR circuit 264, and the storage battery unit 210 and the bidirectional power conditioner 400 are connected. The gap is electrically disconnected.
　このように、制御部２７０は、蓄電池ユニット２１０の異常を示唆する信号を検知した場合第１電磁接触器２５１および第２電磁接触器２５２の開閉制御を実行する。また、第１電磁接触器２５１および第２電磁接触器２５２は、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０を構成する各々の蓄電池パック２１２からの緊急停止信号によって、遮断される。また、マスター蓄電池管理部２２０における停止信号は、設備内の消火装置の作動を通知する信号を受信することで発信される。 Thus, the control unit 270 performs opening / closing control of the first electromagnetic contactor 251 and the second electromagnetic contactor 252 when detecting a signal suggesting an abnormality of the storage battery unit 210. In addition, the first electromagnetic contactor 251 and the second electromagnetic contactor 252 are an emergency stop switch OFF signal, a stop signal from the master storage battery management unit 220, and an emergency from each storage battery pack 212 constituting the storage battery unit 210. It is shut off by the stop signal. Moreover, the stop signal in the master storage battery management part 220 is transmitted by receiving the signal which notifies the action | operation of the fire extinguishing apparatus in an installation.
　また、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０の異常を示唆する信号を検知しない通常時には、制御部２７０は、第３電磁接触器２５３または第４電磁接触器２５４の開閉制御を実行し、蓄電池ユニット２１０の充放電制御のために遮断、通電等を切り替える。通常時の制御では、制御部２７０は、第３電磁接触器２５３および第４電磁接触器２５４の再接続に再起動を要しない。 Further, at the normal time when a signal indicating that the emergency stop switch is turned off, a stop signal from the master storage battery management unit 220, and a signal suggesting an abnormality of the storage battery unit 210 are not detected, the control unit 270 performs the third electromagnetic contactor 253 or the fourth The open / close control of the magnetic contactor 254 is executed, and switching between cutoff and energization is performed for charge / discharge control of the storage battery unit 210. In the normal control, the control unit 270 does not require restarting for reconnection of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254.
　第１電磁接触器２５１および第３電磁接触器２５３は第１電流経路２５７ａに接続されており、いずれも第１電流経路２５７ａを電気的に遮断するために用いられる。そこで、制御部２７０は、第１電磁接触器２５１と第３電磁接触器２５３とのいずれか一方が、例えば接点溶着等の理由で第１電流経路２５７ａの遮断ができなくなった場合、もう一方の電磁接触器に切断信号を出力する。 The first electromagnetic contactor 251 and the third electromagnetic contactor 253 are connected to the first current path 257a, and both are used to electrically cut off the first current path 257a. Therefore, when one of the first electromagnetic contactor 251 and the third electromagnetic contactor 253 cannot cut off the first current path 257a due to, for example, contact welding or the like, the control unit 270 A cutting signal is output to the magnetic contactor.
　例えば、制御部２７０が第１電磁接触器２５１に切断信号を出力したとする。第１電磁接触器２５１が正常に動作し第１電流経路２５７ａを電気的に遮断できれば、第１電磁接触器２５１より制御部２７０に遮断状態を示す信号が通知される。しかしながら、第１電磁接触器２５１が接点溶着等の理由で通電状態を維持すると、第１電磁接触器２５１より制御部２７０に遮断できていない状態を示す信号が通知される。 For example, it is assumed that the control unit 270 outputs a cutting signal to the first electromagnetic contactor 251. If the first electromagnetic contactor 251 operates normally and the first current path 257a can be electrically cut off, the first electromagnetic contactor 251 notifies the control unit 270 of a signal indicating a cut-off state. However, when the first electromagnetic contactor 251 maintains the energized state for contact welding or the like, the first electromagnetic contactor 251 notifies the control unit 270 of a signal indicating a state in which it is not interrupted.
　そこで制御部２７０は第１電磁接触器２５１に対する切断信号の出力の前後における第１電磁接触器２５１からの信号によって第１電磁接触器２５１の動作状態を判断する。第１電磁接触器２５１に対する切断信号の出力の前後において第１電磁接触器２５１からの信号によって、第１電磁接触器が遮断されていない状態の場合、制御部２７０は、ＯＲ回路２６４を介して第３電磁接触器２５３に切断信号を出力する。これにより、万が一第１電磁接触器２５１が動作不良となっても、第１電流経路２５７ａを電気的に遮断することができる。 Therefore, the control unit 270 determines the operating state of the first electromagnetic contactor 251 based on the signal from the first electromagnetic contactor 251 before and after the output of the disconnection signal to the first electromagnetic contactor 251. When the first electromagnetic contactor is not blocked by the signal from the first electromagnetic contactor 251 before and after the output of the disconnection signal to the first electromagnetic contactor 251, the control unit 270 passes through the OR circuit 264. A cutting signal is output to the third electromagnetic contactor 253. Thereby, even if the first electromagnetic contactor 251 malfunctions, the first current path 257a can be electrically cut off.
　第２電磁接触器２５２および第４電磁接触器２５４は第２電流経路２５７ｂに接続されており、いずれも第２電流経路２５７ｂを電気的に遮断するために用いられる。したがって、第１電流経路２５７ａにおける第１電磁接触器２５１および第３電磁接触器２５３の場合と同様に、第２電磁接触器２５２または第４電磁接触器２５４のいずれか一方が接点溶着した場合もう一方に対して切断信号を出力する。 The second electromagnetic contactor 252 and the fourth electromagnetic contactor 254 are connected to the second current path 257b, and both are used to electrically cut off the second current path 257b. Therefore, as in the case of the first electromagnetic contactor 251 and the third electromagnetic contactor 253 in the first current path 257a, when either the second electromagnetic contactor 252 or the fourth electromagnetic contactor 254 is contact-welded, A disconnect signal is output to one of them.
　このように、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０の異常を示唆する信号を検知した場合における制御部２７０は、第１電磁接触器２５１および第２電磁接触器２５２の開閉制御を基本とするが、これらの電磁接触器に動作不良が生じた場合は第３電磁接触器２５３や第４電磁接触器２５４の開閉を制御することで、電流経路２５７の電気的な遮断の確実性を高めることができる。 Thus, the control unit 270 in the case of detecting a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal suggesting an abnormality of the storage battery unit 210, the first electromagnetic contactor 251 and the first 2 Basically, the switching control of the electromagnetic contactor 252 is basically performed. However, when a malfunction occurs in these electromagnetic contactors, the current path is controlled by controlling the opening and closing of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254. The reliability of electrical disconnection of 257 can be increased.
　制御部２７０は、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０の異常を示唆する信号を検知した場合において、第１電磁接触器２５１および第２電磁接触器２５２に対して切断信号を出力するときは、まず第１電磁接触器２５１と第２電磁接触器２５２とのいずれか一方の電磁接触器に切断信号を出力し、続いてもう一方の電磁接触器に切断信号を出力してもよい。例えば、制御部２７０は、第１電磁接触器２５１に切断信号を出力した後に、第２電磁接触器２５２に切断信号を出力する。電流経路２５７の切断順序を明確にすることにより、電圧センサ２５５や電流電圧センサ２５６の計測値の変動が予想しやすくなり、各電磁接触器の動作状態を推測しやすくなる。
　また、第１電流経路２５７ａに設けられた第１電磁接触器２５１と第２電流経路２５７ｂに設けられた第２電磁接触器２５２とがそれぞれ配置されている。第１電磁接触器２５１と第２電磁接触器２５２とがそれぞれ配置され、両者を遮断することで、遮断した際の第１電流経路２５７ａおよび第２電流経路２５７ｂの両方の経路における安全性を確保することができる。 The control unit 270 detects the first electromagnetic contactor 251 and the second electromagnetic contact when detecting a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal indicating an abnormality of the storage battery unit 210. When a disconnection signal is output to the device 252, the disconnection signal is first output to one of the first electromagnetic contactor 251 and the second electromagnetic contactor 252, and then the other electromagnetic contact A disconnect signal may be output to the device. For example, the control unit 270 outputs the disconnection signal to the second electromagnetic contactor 252 after outputting the disconnection signal to the first electromagnetic contactor 251. By clarifying the cutting sequence of the current path 257, it becomes easier to predict the fluctuations in the measured values of the voltage sensor 255 and the current voltage sensor 256, and it becomes easier to estimate the operating state of each electromagnetic contactor.
A first electromagnetic contactor 251 provided in the first current path 257a and a second electromagnetic contactor 252 provided in the second current path 257b are respectively disposed. The first electromagnetic contactor 251 and the second electromagnetic contactor 252 are arranged, and by blocking both, safety is ensured in both the first current path 257a and the second current path 257b. can do.
　電磁接触器は一般に極性を持たないものが多く、極性を意識せずに電流経路に接続できる場合が多い。しかしながら、上述したように、実施の形態に係る蓄電池ユニット２１０は大容量であり、大出力が可能である。実施の形態に係る蓄電池ユニット２１０の出力を遮断するのに適した電磁接触器は、極性を持つものが多い。そこで、第１電磁接触器２５１、第２電磁接触器２５２、第３電磁接触器２５３、および第４電磁接触器２５４はそれぞれ、単独の電磁接触器ではなく、極性の異なったふたつ電磁接触器を並列に接続して構成してもよい。これにより、各電磁接触器の遮断精度を高めることができる。 ∙ Many magnetic contactors generally have no polarity and can be connected to the current path without being conscious of polarity. However, as described above, the storage battery unit 210 according to the embodiment has a large capacity and a large output. Many electromagnetic contactors suitable for blocking the output of the storage battery unit 210 according to the embodiment have polarity. Therefore, each of the first electromagnetic contactor 251, the second electromagnetic contactor 252, the third electromagnetic contactor 253, and the fourth electromagnetic contactor 254 is not a single electromagnetic contactor, but two electromagnetic contactors having different polarities. You may connect and comprise in parallel. Thereby, the interruption | blocking precision of each electromagnetic contactor can be raised.
　以上説明したように、実施の形態に係るスイッチモジュール２５０および制御部２７０から構成されるスイッチング装置によれば、電力を遮断するためのブレーカの代替技術を提供することができる。 As described above, according to the switching device including the switch module 250 and the control unit 270 according to the embodiment, it is possible to provide a breaker alternative technique for cutting off power.
　一般にブレーカは過大電流の遮断を目的とするが、実施の形態に係るスイッチング装置はブレーカの機能を電磁接触器と制御部との組み合わせで代替することで、過大電流以外の種々の異常を示唆する信号を契機として電流経路を遮断することができる。また、ブレーカがブレーカトリップした場合と異なり、ユーザは遠隔操作によって電流経路を復帰することが可能となる。また、ブレーカを使用する場合と比較して省スペース化やコスト削減に資する。 In general, the breaker is intended to cut off the excessive current, but the switching device according to the embodiment suggests various abnormalities other than the excessive current by substituting the function of the breaker with a combination of a magnetic contactor and a control unit. The current path can be interrupted by the signal. Further, unlike the case where the breaker trips, the user can return the current path by remote control. Moreover, it contributes to space saving and cost reduction compared with the case where a breaker is used.
　以上、本発明を実施の形態をもとに説明した。この実施の形態は例示であり、それらの各構成要素や各処理プロセスの組み合わせにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。 The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of the respective constituent elements and processing processes, and such modifications are within the scope of the present invention. is there.
（第１の変形例）
　上記では、マスター蓄電池管理部２２０が、双方向パワーコンディショナ４００との間の通信異常の場合に第１電磁接触器２５１および第２電磁接触器２５２に切断信号を送信する場合について説明した。配電システムの構成によっては、マスター蓄電池管理部２２０が存在しないことも想定される。そのようなシステム構成の場合、制御部２７０が双方向パワーコンディショナ４００と通信をする。制御部２７０は、双方向パワーコンディショナ４００との間の通信異常が生じた場合、第１電磁接触器２５１および第２電磁接触器２５２に切断信号を送信する。この意味で、双方向パワーコンディショナ４００との間の通信異常も、上述した「異常を示唆する信号」のひとつとして考えることもできる。 (First modification)
The case where the master storage battery management unit 220 transmits a disconnection signal to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 when the communication with the bidirectional power conditioner 400 is abnormal has been described above. Depending on the configuration of the power distribution system, it is assumed that the master storage battery management unit 220 does not exist. In the case of such a system configuration, the control unit 270 communicates with the bidirectional power conditioner 400. The control unit 270 transmits a disconnection signal to the first electromagnetic contactor 251 and the second electromagnetic contactor 252 when a communication abnormality with the bidirectional power conditioner 400 occurs. In this sense, an abnormality in communication with the bidirectional power conditioner 400 can also be considered as one of the above-mentioned “signals indicating an abnormality”.
　また、マスター蓄電池管理部２２０が存在する場合であっても、制御部２７０がマスター蓄電池管理部２２０から通信異常を示唆する信号を受け取り、第１電磁接触器２５１および第２電磁接触器２５２に切断信号を送信してもよい。各電磁接触器の開閉制御を制御部２７０に一元化でき、開閉制御が単純化される点で効果がある。 Even if the master storage battery management unit 220 exists, the control unit 270 receives a signal indicating a communication abnormality from the master storage battery management unit 220 and disconnects the first electromagnetic contactor 251 and the second electromagnetic contactor 252. A signal may be transmitted. The opening / closing control of each electromagnetic contactor can be unified with the control unit 270, which is advantageous in that the opening / closing control is simplified.
　また各電磁接触器の開閉制御を制御部２７０に一元化する場合、制御部２７０は、通信異常を示唆する信号を受け取った場合に第３電磁接触器２５３および第４電磁接触器２５４に切断信号を出力するようにしもよい。この場合、第３電磁接触器２５３および第４電磁接触器２５４が動作不良のときには第１電磁接触器２５１および第２電磁接触器２５２に切断信号を送信する。各電磁接触器の開閉制御の順序が一元化されるので、開閉制御が単純化される点で効果がある。 In addition, when the switching control of each electromagnetic contactor is unified to the control unit 270, the control unit 270 sends a disconnection signal to the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254 when a signal indicating a communication abnormality is received. You may make it output. In this case, when the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254 are malfunctioning, a disconnection signal is transmitted to the first electromagnetic contactor 251 and the second electromagnetic contactor 252. Since the order of the switching control of each electromagnetic contactor is unified, there is an effect in that the switching control is simplified.
（第２の変形例）
　上記では、電磁接触器は、通常状態ではバネ等の付勢力によって接触子が電流経路を接続しているが、電磁石に電力が供給されると付勢力よりも大きな磁力によって接触子が電磁石に引き寄せられ、電流経路が切断される場合について説明した。電磁接触器はこの場合に限られず、通常状態ではバネ等の付勢力によって接触子が電流経路から離れているが、電磁石に電力が供給されると付勢力よりも大きな磁力によって接触子が電磁石に引き寄せられ、電流経路と接続される種類の電磁接触器存在する。このような電磁接触器を用いても、本発明は成立する。 (Second modification)
In the above, in the normal state, the contactor is connected to the current path by an urging force such as a spring in the normal state. The case where the current path is disconnected has been described. The electromagnetic contactor is not limited to this case. In a normal state, the contactor is separated from the current path by the biasing force of a spring or the like. There are types of electromagnetic contactors that are attracted and connected to the current path. Even if such an electromagnetic contactor is used, the present invention is established.
（第３の変形例）
　上記では、第１電流経路２５７ａ上に第１電磁接触器２５１と直列に接続する第３電磁接触器２５３が接続されるとともに、第２電流経路２５７ｂ上に第２電磁接触器２５２と直列に接続する第４電磁接触器２５４が接続されている場合について説明した。ここで、第１電流経路２５７ａと第２電流経路２５７ｂとがともに、ふたつの直列した電磁接触器を備えることは必ずしも必要ではない。少なくともいずれか一方の電流経路２５７上においてふたつの直列した電磁接触器を備えていればよい。 (Third Modification)
In the above, the third electromagnetic contactor 253 connected in series with the first electromagnetic contactor 251 is connected on the first current path 257a, and connected in series with the second electromagnetic contactor 252 on the second current path 257b. The case where the 4th electromagnetic contactor 254 to be connected was demonstrated. Here, it is not always necessary that both the first current path 257a and the second current path 257b include two series electromagnetic contactors. It is only necessary to provide two in-line magnetic contactors on at least one of the current paths 257.
　上述したとおり、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０の異常を示唆する信号を検知しない通常時には、制御部２７０は、第３電磁接触器２５３または第４電磁接触器２５４の開閉制御を実行し、蓄電池ユニット２１０の充放電制御のために遮断、通電を切り替える。このように、蓄電池ユニット２１０の充放電制御の利用が目的であれば、第３電磁接触器２５３と第４電磁接触器２５４とのうち少なくともいずれか一方において電流経路２５７を切断するだけでもよい。 As described above, the control unit 270 controls the third electromagnetic contactor 253 or the normal electromagnetic signal when the emergency stop switch is turned off, the stop signal from the master storage battery management unit 220, and the signal suggesting an abnormality of the storage battery unit 210. Opening / closing control of the fourth electromagnetic contactor 254 is executed, and the charge / discharge control of the storage battery unit 210 is switched between cutoff and energization. As described above, if the purpose of the charge / discharge control of the storage battery unit 210 is to be used, the current path 257 may only be disconnected in at least one of the third electromagnetic contactor 253 and the fourth electromagnetic contactor 254.
　図６は、実施の形態の第３の変形例に係るスイッチモジュール２５０の回路構成を模式的に示す図である。図６に示す例は、図５に示す例と比較して、第２電流経路２５７ｂ上に第４電磁接触器２５４が接続されていない点で異なるが、他の構成は同様である。図６に示すように、第１電流経路２５７ａ上における第１電磁接触器２５１には、第３電磁接触器２５３が直列に接続されている。一方、第２電流経路２５７ｂ上における第２電磁接触器２５２に対して、いずれの電磁接触器も直列に接続されていない。 FIG. 6 is a diagram schematically illustrating a circuit configuration of a switch module 250 according to a third modification of the embodiment. The example shown in FIG. 6 differs from the example shown in FIG. 5 in that the fourth electromagnetic contactor 254 is not connected on the second current path 257b, but the other configurations are the same. As shown in FIG. 6, a third electromagnetic contactor 253 is connected in series to the first electromagnetic contactor 251 on the first current path 257a. On the other hand, no electromagnetic contactor is connected in series to the second electromagnetic contactor 252 on the second current path 257b.
　第３の変形例に係る制御部２７０は、緊急停止スイッチのオフによる信号、マスター蓄電池管理部２２０からの停止信号、および蓄電池ユニット２１０の異常を示唆する信号を検知しない通常時には第３電磁接触器２５３の開閉を制御して、蓄電池ユニット２１０の充放電を制御する。また蓄電池ユニット２１０の異常を示唆する信号を検知した場合において、第１電磁接触器２５１とが接点溶着等の理由で第１電流経路２５７ａの遮断ができなくなった場合、第３電磁接触器２５３に対して切断信号を出力する。 The control unit 270 according to the third modification includes a third electromagnetic contactor in a normal state in which a signal due to turning off the emergency stop switch, a stop signal from the master storage battery management unit 220, and a signal suggesting an abnormality of the storage battery unit 210 are not detected. The charging / discharging of the storage battery unit 210 is controlled by controlling the opening and closing of the H.253. Further, when a signal indicating an abnormality of the storage battery unit 210 is detected, if the first current path 257a cannot be blocked due to contact welding with the first electromagnetic contactor 251, the third electromagnetic contactor 253 In response, a disconnection signal is output.
　図６は、第１電流経路２５７ａ上において第１電磁接触器２５１と第３電磁接触器２５３とが直列に接続されている場合の例を示す図である。この他、第２電流経路２５７ｂ上における第２電磁接触器２５２に電磁接触器が直列に接続し、第１電磁接触器２５１にはいずれの電磁接触器も直列に接続されなくてもよい。 FIG. 6 is a diagram illustrating an example in which the first electromagnetic contactor 251 and the third electromagnetic contactor 253 are connected in series on the first current path 257a. In addition, an electromagnetic contactor may be connected in series to the second electromagnetic contactor 252 on the second current path 257b, and no electromagnetic contactor may be connected in series to the first electromagnetic contactor 251.
　なお、本実施の形態に係る発明は、以下に記載する項目によって特定されてもよい。
（項目１）
　蓄電池と接続可能な電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、
　前記電磁接触器の動作を制御する制御部とを備え、
　前記制御部は、
　（１）前記電磁接触器が電流経路を接続している場合において前記電流経路を切断させることを指示するための切断信号を前記電磁接触器に出力するときは、起動したまま切断信号を出力し、
　（２）前記電磁接触器が前記電流経路を切断している場合において前記電流経路を接続させることを指示するための接続信号を前記電磁接触器に出力する前に再起動する、
　ことを特徴とするスイッチング装置。
（項目２）
　前記制御部は、緊急停止スイッチのオフによる信号又はマスター蓄電池管理部２２０からの停止信号又は蓄電池の異常を示唆する信号を検知した場合、前記切断信号を出力することを特徴とする項目１に記載のスイッチング装置。
（項目３）
　前記電磁接触器は、極性の異なったふたつ電磁接触器を並列に接続して構成されていることを特徴とする項目１または２に記載のスイッチング装置。
（項目４）
　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備えていることを特徴とする請求項１から３のいずれかに記載のスイッチング装置。
（項目５）
　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備え、
　前記制御部は、蓄電池の異常を示唆する信号を検知した場合、前記第１電磁接触器と前記第２電磁接触器とのいずれか一方の電磁接触器に切断信号を出力した後、もう一方の電磁接触器に切断信号を出力することを特徴とする項目１から４のいずれかに記載のスイッチング装置。
（項目６）
　前記第１電流経路上における前記第１電磁接触器か、または前記第２電流経路上における前記第２電磁接触器の少なくともいずれか一方の電磁接触器と直列に接続する第３電磁接触器をさらに備え、
　前記制御部は、前記第３電磁接触器と直列に接続する電磁接触器が接点溶着した場合、前記第３電磁接触器に対して切断信号を出力することを特徴とする項目５に記載のスイッチング装置。
（項目７）
　蓄電池の異常を示唆する信号は、蓄電池の過放電を示唆する信号、蓄電池の過充電を示唆する信号、蓄電池の温度に関する信号、蓄電池が過電圧であることを示唆する信号、および電流経路を流れる電流が過電流であることを示唆する信号の少なくとも１つを含むことを特徴とする項目２から５のいずれかに記載のスイッチング装置。
（項目８）
　蓄電池と、
　前記蓄電池と接続可能な電流経路と、
　前記電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、
　前記電磁接触器の動作を制御する制御部とを備え、
　前記制御部は、
　（１）前記電磁接触器が電流経路を接続している場合において前記電流経路を切断させることを指示するための切断信号を前記電磁接触器に出力するときは、起動したまま切断信号を出力し、
　（２）前記電磁接触器が前記電流経路を切断している場合において前記電流経路を接続させることを指示するための接続信号を前記電磁接触器に出力する前に再起動する、
　ことを特徴とする蓄電池システム。
（項目９）
　前記制御部は、緊急停止スイッチのオフによる信号又はマスター蓄電池管理部２２０からの停止信号又は蓄電池の異常を示唆する信号を検知した場合、前記切断信号を出力することを特徴とする項目８に記載の蓄電池システム。
（項目１０）
　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備えていることを特徴とする項目８または９に記載の蓄電池システム。
（項目１１）
　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備え、
　前記制御部は、蓄電池の異常を示唆する信号を検知した場合、前記第１電磁接触器と前記第２電磁接触器とのいずれか一方の電磁接触器に切断信号を出力した後、もう一方の電磁接触器に切断信号を出力することを特徴とする項目８から１０のいずれかに記載の蓄電池システム。 The invention according to the present embodiment may be specified by the items described below.
(Item 1)
An electromagnetic contactor disposed on a current path connectable to the storage battery and electrically connecting or disconnecting the current path;
A controller for controlling the operation of the electromagnetic contactor,
The controller is
(1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. ,
(2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path;
A switching device characterized by that.
(Item 2)
The control unit outputs the disconnection signal when detecting a signal due to turning off an emergency stop switch, a stop signal from the master storage battery management unit 220, or a signal suggesting an abnormality of the storage battery. Switching device.
(Item 3)
3. The switching device according to item 1 or 2, wherein the electromagnetic contactor is configured by connecting two electromagnetic contactors having different polarities in parallel.
(Item 4)
The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
The said electromagnetic contactor is provided with the 1st electromagnetic contactor arrange | positioned on the said 1st current path, and the 2nd electromagnetic contactor arrange | positioned on the said 2nd current path. The switching device according to any one of 1 to 3.
(Item 5)
The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
The electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
When the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, 5. The switching device according to any one of items 1 to 4, wherein a cutting signal is output to the magnetic contactor.
(Item 6)
A third electromagnetic contactor connected in series with at least one of the first electromagnetic contactor on the first current path or the second electromagnetic contactor on the second current path; Prepared,
The switching according to item 5, wherein the control unit outputs a disconnection signal to the third electromagnetic contactor when the electromagnetic contactor connected in series with the third electromagnetic contactor is welded to the contact point. apparatus.
(Item 7)
Signals that indicate abnormalities in the storage battery are signals that indicate overdischarge of the storage battery, signals that indicate overcharge of the storage battery, signals regarding the temperature of the storage battery, signals that indicate that the storage battery is overvoltage, and current that flows through the current path 6. The switching device according to any one of items 2 to 5, including at least one of signals indicating that is an overcurrent.
(Item 8)
A storage battery,
A current path connectable to the storage battery;
An electromagnetic contactor disposed on the current path and electrically connecting or disconnecting the current path;
A controller for controlling the operation of the electromagnetic contactor,
The controller is
(1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. ,
(2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path;
A storage battery system characterized by that.
(Item 9)
The control unit outputs the disconnection signal when detecting a signal due to turning off an emergency stop switch, a stop signal from the master storage battery management unit 220, or a signal suggesting an abnormality of the storage battery. Storage battery system.
(Item 10)
The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
Item 8 is characterized in that the electromagnetic contactor comprises a first electromagnetic contactor disposed on the first current path and a second electromagnetic contactor disposed on the second current path. Or the storage battery system of 9.
(Item 11)
The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
The electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
When the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, 11. The storage battery system according to any one of items 8 to 10, wherein a cutting signal is output to the magnetic contactor.
　Ｎ１　第１ノード、　Ｎ２　第２ノード、　Ｎ３　第３ノード、　Ｎ４　第４ノード、　１００　配電システム、　２００　蓄電池コンテナ、　２１０　蓄電池ユニット、　２１０ａ　第１蓄電池ユニット、　２１０ｂ　第２蓄電池ユニット、　２１０ｃ　第３蓄電池ユニット、　２１０ｄ　第４蓄電池ユニット、　２１２　蓄電池パック、　２１４　蓄電池収容棚、　２１６ａ　第１仕切部、　２１６ｂ　第２仕切部、　２１６ｃ　第３仕切部、　２２０　マスター蓄電池管理部、　２４０　蓄電池システム、　２５０　スイッチモジュール、　２５０ａ　第１スイッチモジュール、　２５０ｂ　第２スイッチモジュール、　２５０ｃ　第３スイッチモジュール、　２５０ｄ　第４スイッチモジュール、　２５１　第１電磁接触器、　２５２　第２電磁接触器、　２５３　第３電磁接触器、　２５４　第４電磁接触器、　２５５　電圧センサ、　２５６　電流電圧センサ、　２５７　電流経路、　２５７ａ　第１電流経路、　２５７ｂ　第２電流経路、　２５８ａ　第１ヒューズ、　２５８ｂ　第２ヒューズ、　２６０　蓄電池管理部、　２６０ａ　第１蓄電池管理部、　２６０ｂ　第２蓄電池管理部、　２６０ｃ　第３蓄電池管理部、　２６０ｄ　第４蓄電池管理部、　２６４　ＯＲ回路、　２７０　制御部、　２８０　緊急停止スイッチ、　３００　太陽電池、　４００　双方向パワーコンディショナ、　４１０　双方向インバータ、　４２０　制御部、　４３０　ＤＣ／ＤＣコンバータ、　４３０ａ　第１ＤＣ／ＤＣコンバータ、　４３０ｂ　第２ＤＣ／ＤＣコンバータ、　４３０ｃ　第３ＤＣ／ＤＣコンバータ、　４３０ｄ　第４ＤＣ／ＤＣコンバータ、　４４０　太陽電池用ＤＣ／ＤＣコンバータ、　５００　系統電源、　６００　負荷。 N1 first node, N2 second node, N3 third node, N4 fourth node, 100 power distribution system, 200 storage battery container, 210 storage battery unit, 210a first storage battery unit, 210b second storage battery unit, 210c third storage battery unit, 210d 4th storage battery unit, 212 storage battery pack, 214 storage battery storage shelf, 216a first partition, 216b second partition, 216c third partition, 220 master storage battery manager, 240 storage battery system, 250 switch module, 250a first Switch module, 250b second switch module, 250c third switch module, 250d fourth switch module, 251 first electromagnetic contactor, 2 2 2nd magnetic contactor, 253 3rd magnetic contactor, 254 4th magnetic contactor, 255 voltage sensor, 256 current voltage sensor, 257 current path, 257a 1st current path, 257b 2nd current path, 258a 1st fuse , 258b second fuse, 260 storage battery management unit, 260a first storage battery management unit, 260b second storage battery management unit, 260c third storage battery management unit, 260d fourth storage battery management unit, 264 OR circuit, 270 control unit, 280 emergency stop Switch, 300 solar cell, 400 bidirectional power conditioner, 410 bidirectional inverter, 420 control unit, 430 DC / DC converter, 430a first DC / DC converter, 430b second DC / DC converter 430c The 3DC / DC converter, 430d first 4DCs / DC converter, 440 a solar cell DC / DC converter, 500 system power source, 600 load.
　本発明は、蓄電池と接続する電流経路を開閉するスイッチング装置に利用可能である。 The present invention can be used for a switching device that opens and closes a current path connected to a storage battery.

Claims (11)

  1. 　蓄電池と接続可能な電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、
    　前記電磁接触器の動作を制御する制御部とを備え、
    　前記制御部は、
    　（１）前記電磁接触器が電流経路を接続している場合において前記電流経路を切断させることを指示するための切断信号を前記電磁接触器に出力するときは、起動したまま切断信号を出力し、
    　（２）前記電磁接触器が前記電流経路を切断している場合において前記電流経路を接続させることを指示するための接続信号を前記電磁接触器に出力する前に再起動する、
    　ことを特徴とするスイッチング装置。     An electromagnetic contactor disposed on a current path connectable to the storage battery and electrically connecting or disconnecting the current path;
    A controller for controlling the operation of the electromagnetic contactor,
    The controller is
    (1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. ,
    (2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path;
    A switching device characterized by that.
  2. 　前記制御部は、緊急停止スイッチのオフによる信号又はマスター蓄電池管理部２２０からの停止信号又は蓄電池の異常を示唆する信号を検知した場合、前記切断信号を出力することを特徴とする請求項１に記載のスイッチング装置。 The said control part outputs the said disconnection signal, when the signal by the emergency stop switch OFF, the stop signal from the master storage battery management part 220, or the signal which suggests the abnormality of a storage battery is detected. The switching device described.
  3. 　前記電磁接触器は、極性の異なったふたつ電磁接触器を並列に接続して構成されていることを特徴とする請求項１または２に記載のスイッチング装置。 The switching device according to claim 1 or 2, wherein the electromagnetic contactor is configured by connecting two electromagnetic contactors having different polarities in parallel.
  4. 　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
    　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備えていることを特徴とする請求項１から３のいずれかに記載のスイッチング装置。     The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
    The said electromagnetic contactor is provided with the 1st electromagnetic contactor arrange | positioned on the said 1st current path, and the 2nd electromagnetic contactor arrange | positioned on the said 2nd current path. The switching device according to any one of 1 to 3.
  5. 　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
    　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備え、
    　前記制御部は、蓄電池の異常を示唆する信号を検知した場合、前記第１電磁接触器と前記第２電磁接触器とのいずれか一方の電磁接触器に切断信号を出力した後、もう一方の電磁接触器に切断信号を出力することを特徴とする請求項１から４のいずれかに記載のスイッチング装置。     The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
    The electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
    When the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, The switching device according to claim 1, wherein a cutting signal is output to the magnetic contactor.
  6. 　前記第１電流経路上における前記第１電磁接触器か、または前記第２電流経路上における前記第２電磁接触器の少なくともいずれか一方の電磁接触器と直列に接続する第３電磁接触器をさらに備え、
    　前記制御部は、前記第３電磁接触器と直列に接続する電磁接触器が接点溶着した場合、前記第３電磁接触器に対して切断信号を出力することを特徴とする請求項５に記載のスイッチング装置。     A third electromagnetic contactor connected in series with at least one of the first electromagnetic contactor on the first current path or the second electromagnetic contactor on the second current path; Prepared,
    The said control part outputs a cutting | disconnection signal with respect to the said 3rd magnetic contactor, when the electromagnetic contactor connected in series with the said 3rd magnetic contactor welds a contact. Switching device.
  7. 　蓄電池の異常を示唆する信号は、蓄電池の過放電を示唆する信号、蓄電池の過充電を示唆する信号、蓄電池の温度に関する信号、蓄電池が過電圧であることを示唆する信号、および電流経路を流れる電流が過電流であることを示唆する信号の少なくとも１つを含むことを特徴とする請求項２から５のいずれかに記載のスイッチング装置。 Signals that indicate abnormalities in the storage battery are signals that indicate overdischarge of the storage battery, signals that indicate overcharge of the storage battery, signals regarding the temperature of the storage battery, signals that indicate that the storage battery is overvoltage, and current that flows through the current path 6. The switching device according to claim 2, further comprising at least one of signals indicating that is an overcurrent.
  8. 　蓄電池と、
    　前記蓄電池と接続可能な電流経路と、
    　前記電流経路上に配置され、電流経路を電気的に接続または切断する電磁接触器と、
    　前記電磁接触器の動作を制御する制御部とを備え、
    　前記制御部は、
    　（１）前記電磁接触器が電流経路を接続している場合において前記電流経路を切断させることを指示するための切断信号を前記電磁接触器に出力するときは、起動したまま切断信号を出力し、
    　（２）前記電磁接触器が前記電流経路を切断している場合において前記電流経路を接続させることを指示するための接続信号を前記電磁接触器に出力する前に再起動する、
    　ことを特徴とする蓄電池システム。     A storage battery,
    A current path connectable to the storage battery;
    An electromagnetic contactor disposed on the current path and electrically connecting or disconnecting the current path;
    A controller for controlling the operation of the electromagnetic contactor,
    The controller is
    (1) When the magnetic contactor is connected to a current path, when outputting a disconnection signal for instructing to disconnect the current path to the magnetic contactor, the disconnection signal is output while being activated. ,
    (2) Restarting before outputting a connection signal for instructing connection of the current path when the magnetic contactor is cutting off the current path;
    A storage battery system characterized by that.
  9. 　前記制御部は、緊急停止スイッチのオフによる信号又はマスター蓄電池管理部２２０からの停止信号又は蓄電池の異常を示唆する信号を検知した場合、前記切断信号を出力することを特徴とする請求項８に記載の蓄電池システム。 The said control part outputs the said disconnection signal, when detecting the signal by the emergency stop switch OFF, the stop signal from the master storage battery management part 220, or the signal which suggests the abnormality of a storage battery, It is characterized by the above-mentioned. The storage battery system described.
  10. 　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
    　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備えていることを特徴とする請求項８または９に記載の蓄電池システム。     The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
    The said electromagnetic contactor is provided with the 1st electromagnetic contactor arrange | positioned on the said 1st current path, and the 2nd electromagnetic contactor arrange | positioned on the said 2nd current path. The storage battery system according to 8 or 9.
  11. 　前記電流経路は、蓄電池の正極端子と接続する第１電流経路と、蓄電池の負極端子と接続する第２電流経路とを備え、
    　前記電磁接触器は、前記第１電流経路上に配置される第１電磁接触器と、前記第２電流経路上に配置される第２電磁接触器とを備え、
    　前記制御部は、蓄電池の異常を示唆する信号を検知した場合、前記第１電磁接触器と前記第２電磁接触器とのいずれか一方の電磁接触器に切断信号を出力した後、もう一方の電磁接触器に切断信号を出力することを特徴とする請求項８から１０のいずれかに記載の蓄電池システム。     The current path includes a first current path connected to the positive terminal of the storage battery, and a second current path connected to the negative terminal of the storage battery,
    The electromagnetic contactor includes a first electromagnetic contactor disposed on the first current path, and a second electromagnetic contactor disposed on the second current path,
    When the control unit detects a signal suggesting abnormality of the storage battery, the control unit outputs a disconnection signal to one of the first electromagnetic contactor and the second electromagnetic contactor, The storage battery system according to any one of claims 8 to 10, wherein a cutting signal is output to the magnetic contactor.
PCT/JP2013/005571 2013-09-20 2013-09-20 Switching device and storage battery system WO2015040655A1 (en)

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