JP2013070441A - Storage battery device and method of operating storage battery device - Google Patents

Storage battery device and method of operating storage battery device Download PDF

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JP2013070441A
JP2013070441A JP2011204988A JP2011204988A JP2013070441A JP 2013070441 A JP2013070441 A JP 2013070441A JP 2011204988 A JP2011204988 A JP 2011204988A JP 2011204988 A JP2011204988 A JP 2011204988A JP 2013070441 A JP2013070441 A JP 2013070441A
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battery
plurality
control device
unit
device
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JP2011204988A
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JP5755540B2 (en
Inventor
Kazuto Kuroda
和人 黒田
Shinichiro Kosugi
伸一郎 小杉
Rei Okabe
令 岡部
Motohiro Ito
元洋 伊藤
Manabu Murakami
学 村上
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Toshiba Corp
株式会社東芝
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Abstract

PROBLEM TO BE SOLVED: To provide a storage battery device that implements improved starting and operating safety by monitoring a plurality of cells included in a battery module, managing a battery pack unit including a plurality of battery modules, and managing and controlling the storage battery device including a plurality of battery pack units.SOLUTION: According to an embodiment, the battery pack unit (20-1) has the battery modules (30-1 ...), a current sensor (41), a switch circuit (42), a battery management device (44), a first charge/discharge terminal (51) and a second charge/discharge terminal (52). A gate control device (60) intercommunicates with each battery management device in the plurality of battery pack units. The battery management device (44) turns off the switch circuit to disconnect the unit and notifies the gate control device of an anomaly if monitoring data from battery monitoring units and/or measurement data from the current sensor indicate a preset outlier.

Description

  Embodiments described herein relate generally to a storage battery device and a method for operating the storage battery device.

  In recent years, storage battery devices using lithium ion secondary batteries and the like have been put into practical use. The storage battery device can be used in various fields such as a power supply device for driving a motor of a vehicle or an emergency power supply device in the event of a power failure.

  The lithium ion secondary battery currently in practical use has a storage capacity of about 100 Wh as a single battery.

JP 2008-193757 A

  As a future storage battery device, development of a large-scale storage battery device capable of supplying large electric power is demanded. Therefore, consider designing a large-scale storage battery device having a battery capacity of MWh class using a battery having a storage capacity of about 100 Wh. The design in this case needs to be planned by combining 1000 to 10000 batteries in series and / or in parallel depending on the required output voltage and current capacity.

  When designing a large-scale storage battery device as described above, the designer needs to pay particular attention to the following points. Lithium ion secondary batteries may lose battery safety against overcharge or overdischarge. In addition, when overcharge or overdischarge is repeated, the service life is shortened.

  Furthermore, the lithium ion secondary battery has a low output resistance. For this reason, in a device in which a plurality of lithium ion secondary batteries are connected in parallel, if any of the batteries is internally short-circuited, an excessive current flows in the current path, which may impair the safety of the entire device.

  Therefore, in the present embodiment, in order to realize a large-scale capacity, with a large number of connected batteries, (a) monitoring a plurality of batteries (cells) included in the battery module, (b) including a plurality of battery modules Manages battery pack units, (c) manages and controls storage battery devices that include multiple battery pack units, and links the items (a), (b), and (c) above to increase the safety of startup and operation. An object of the present invention is to provide a large-scale storage battery device to be improved and a method for operating the large-scale storage battery device.

According to the embodiment, a battery module including a plurality of batteries connected in series and a battery monitoring unit that monitors the voltage and temperature of the plurality of batteries;
A battery module circuit in which a plurality of the battery modules are connected in series;
A current sensor for detecting a current flowing in the battery module circuit;
A charging / discharging path provided in either or both of a path connecting the positive terminal of the series battery module circuit to the positive charge / discharge terminal and a path connecting the negative terminal of the series battery module circuit to the negative charge / discharge terminal. A switch circuit for turning on or off;
A battery management device that determines monitoring data from a plurality of battery monitoring units and detection data of the current sensor, controls the switch circuit based on a determination result, and outputs notification data;
A plurality of assembled battery units each including the battery module circuit, the current sensor, the switch circuit, and the battery management device;
A gateway control device that performs mutual communication with the plurality of battery management devices in the plurality of assembled battery units connected to the plurality of assembled battery units,
Each of the plurality of battery management devices refers to monitoring data sent from a battery monitoring unit to be managed and / or measurement data sent from a current sensor to determine a preset abnormal state The switch circuit in the assembled battery unit causing the abnormality is turned off, and the assembled battery unit is disconnected from the connected state to the other assembled battery unit. Notification is performed.

It is a block block diagram which shows an example of a structure of the large-scale storage battery apparatus which is embodiment. It is a figure which shows simply the inside of the battery module shown in FIG. It is a figure which shows the typical procedure of the operation | movement at the time of starting of the apparatus shown in FIG. It is a figure which shows the typical procedure of the operation | movement at the time of starting of the apparatus shown in FIG. 1, and is a figure which shows the continuation of FIG. 3A. It is a figure which shows the typical procedure of the operation | movement at the time of starting of the apparatus shown in FIG. 1, and is a figure which shows the continuation of FIG. 3B. It is a figure which shows the typical procedure of the operation | movement at the time of starting of the apparatus shown in FIG. 1, and is a figure which shows the continuation of FIG. 3C. It is a figure which shows the typical procedure of the operation | movement at the time of the stop of the apparatus shown in FIG. It is a figure which shows the typical procedure of operation | movement when an overcharge is detected in the apparatus shown in FIG. It is a figure which shows the typical procedure of the operation | movement at the time of an overcharge trip in the apparatus shown in FIG. It is a figure which shows the typical procedure of the operation | movement at the time of overtemperature in the apparatus shown in FIG.

  Hereinafter, embodiments will be described with reference to the drawings. An overview of the entire system of the large-scale storage battery device according to this embodiment will be described with reference to FIG.

  In FIG. 1, reference numerals 10-1, 10-2,..., 10-n denote storage battery devices (may be referred to as battery panels). The storage battery devices 10-1, 10-2,... 10-n have the same configuration, for example, 16 pieces are prepared. In the figure, the internal configuration of one storage battery device 10-1 is shown as a representative.

  The storage battery device 10-1 has charge / discharge terminals 51 and 52. For example, the charge / discharge terminal 51 is a plus terminal, and the charge / discharge terminal 52 is a minus terminal. The charge / discharge terminals 51 and 52 are connected to the circuit breaker 12-1 of the battery terminal board 12. The battery terminal board 12 has circuit breakers 12-1, 12-2, ... 12-n corresponding to the storage battery devices 10-1, 10-2, ... 10-n. The circuit breakers 12-1, 12-2,... 12-n are manually opened and closed. The plus terminals of the circuit breakers 12-1, 12-2,... 12-n are commonly connected, and the minus terminals are commonly connected. The common connection of plus terminals is a state where plus terminals are bundled together, and the common connection of minus terminals is a state where minus terminals are bundled together. The direct current (DC) voltage between the plus and minus terminals of the battery terminal board 12 is set to be about 490V to 778V, for example. Further, the battery terminal board 12 includes a master control device 80 described later.

  The DC voltage output from the battery terminal board 12 is supplied to a power conditioner (PCS) 14. The power conditioner 14 boosts the DC voltage by switching the DC voltage and generates an alternating current (AC) output. The AC output is, for example, 6.6 kV at 50 Hz. The output of the power conditioner 14 is supplied to a power supply line of an external power system. The power conditioner 14 has a bidirectional AC / DC conversion function for taking power in and out between the power system and the battery. The power conditioner 14 can include an uninterruptible power supply 14-1. The output of the uninterruptible power supply device is supplied to the DC power supply devices of the storage battery devices 10-1, 10-2,... 10-n via the master control device 80. In FIG. 1, a DC power supply device 70 in the storage battery device 10-1 is shown as a representative.

  Next, the internal configuration of the storage battery device 10-1 will be described. The storage battery device 10-1 includes a plurality of (for example, 16) assembled battery units 20-1, 20-2,... 20-16 connected in parallel. Since the assembled battery units 20-1, 20-2,... 20-16 have the same configuration, the internal configuration of the assembled battery unit 20-1 is shown in FIG.

  The configuration of the assembled battery unit 20-1 will be described. The assembled battery unit 20-1 includes a plurality (for example, 22) of battery modules 30-1, 30-2,... 30-22 connected in series. A switch 46 may be provided in the middle of the series circuit composed of the battery modules 30-1, 30-2,... 30-22. This switch 46 is used, for example, to turn off the series circuit when any battery module is removed for inspection. The switch 46 may also serve as a disconnector (service disconnect), and may be a fuse. In some cases, wiring is provided for notifying the battery management device 44 described later of the insertion / extraction state and the fuse state.

  Each of the battery modules 30-1, 30-2, ... 30-22 described above has the same configuration. Each of the battery modules 30-1, 30-2,... 30-22 includes at least a plurality of batteries connected in series and a battery monitoring unit 32 that monitors the temperature and voltage of the plurality of batteries. A simple internal configuration of the battery module is shown in FIG. 2 on behalf of the battery module 30-1. In the battery module 30-1, a first battery circuit composed of a plurality of (for example, twelve) batteries Ca1-Ca12 connected in series and a second circuit composed of a plurality of (for example, twelve) batteries Cb1-Cb12 connected in series. The battery circuit is connected in parallel to form a parallel circuit. The battery is, for example, a lithium ion secondary battery, and a battery having a storage capacity of about several tens Wh to several hundreds Wh (for example, an average voltage 2 [V] to 5 V × output current 3 [Ah] to 100 Ah) is used. Yes. A plus terminal and a minus terminal of the parallel circuit are derived. Further, a battery monitoring unit (BMU: Battery Monitoring Unit) 32 is provided in the battery module 30-1. The battery monitoring unit 32 monitors (detects or detects) the terminal voltage of each battery. The battery monitoring unit 32 can detect the temperature of each battery or the temperature in the battery module. The battery monitoring unit 32 includes a control unit including a microprocessor inside and a transmitter / receiver for communicating with the outside.

  Returning to FIG. 1, the internal structure of the assembled battery unit 20-1 will be further described. The current sensor 41 is connected to one terminal of a series circuit in which a plurality of battery modules 30-1, ... 30-21, 30-22 are connected in series. One input / output terminal of the switch circuit 42 (electromagnetic contactor) is connected to one terminal of the series circuit. A first charge / discharge terminal 51 is provided at the other input / output terminal of the switch circuit 42. Moreover, the 2nd charging / discharging terminal 52 is provided in the other terminal of the series circuit which connected the some battery module 30-1, ... 30-21, 30-22 in series.

  In the switch circuit 42, a switch S1 having no resistance and a switch S1 in which a resistor R2 is connected in series are connected in parallel.

  In the figure, the switch circuit 42 is provided between the charge / discharge terminal 51 and the current sensor 41. However, a further switch circuit is provided between the charge / discharge terminal 52 and the battery module 30-22. This is because even if one of the switch circuits is not opened due to contact welding or the like, the other switch circuit is "opened" for safety.

  Here, the battery monitoring units 32 in the battery modules 30-1, 30-2,..., 30-22 are connected to the battery management device 44 via the communication bus line and can communicate with each other. it can. In addition, a current sensor 41 is connected to the battery management device 44. The battery management device 44 can receive current data measured by the current sensor 41.

  The battery management device 44 includes a control unit including a microprocessor, and also includes a transmission / reception unit for communicating with the battery monitoring unit 32. Further, the battery management device 44 can output a control signal to control the switches S1 and S2 of the switch circuit 42. The battery management device 44 is connected to a gateway control device 60 (also referred to as a gateway device), and can transmit and receive various data between them. The barrier control device 60 can control the operation of the battery management device 44 and the operation of the DC power supply device 70. That is, the barrier control device 60 performs overall control of each assembled battery unit 20-1... 20-16.

  The barrier control device 60 is provided in each of the storage battery devices 10-1, 10-2, ... 10-n. The gate control devices in each of the storage battery devices 10-1, 10-2,... 10-n are connected to the master control device 80 via a communication bus line and can communicate with each other. The master control device 80 includes a control unit including a microprocessor inside and includes a transceiver for communicating with the outside. The master controller 80 also monitors the states of the circuit breakers 12-1, 12-2,... 12-n.

  As described above, this (large-scale) storage battery device has an independent switch circuit 42 (electromagnetic contactor) for each assembled battery unit. For this reason, it is possible to perform charging / disconnection (opening) independently for each assembled battery unit with respect to the DC bus (wiring connecting the assembled battery unit output terminals in parallel). Opening or opening means setting or disconnecting from a connected state with another battery unit.

  Therefore, when an assembled battery unit having a large voltage difference between the output voltage of the assembled battery unit (voltage obtained from the detection value of the current sensor 41) and the DC bus is detected at the time of activation, the activation is stopped only for the detected assembled battery unit. be able to. For example, when a battery module in a certain assembled battery unit is removed, short-circuited, or broken, an assembled battery unit that does not include this battery module can be configured. Further, when a failure occurs in a certain assembled battery unit or a battery module in the assembled battery unit, only the assembled battery unit in which the failure has occurred is disconnected, and the operation of the entire storage battery device can be continued.

  When an abnormal state (failure) occurs (for example, abnormal temperature information, abnormal current, abnormal voltage drop), this is detected by the battery management device 44. And the switch circuit 42 in an assembled battery unit is turned off, and the safety | security of the whole apparatus is acquired.

  Furthermore, the number of assembled battery units in the operating state or the information on the total output capacity and the remaining capacity can be transmitted to the power conditioner 14 and the master control device 80 via the gateway control device. For this transmission path, various communication networks such as Ethernet (registered trademark) can be used. The power conditioner 14 converts the direct current sent from each assembled battery unit 20-1... 20-16 into an alternating current.

  The power conditioner 14 according to the present embodiment can perform a protection operation of the power storage system by performing power output limitation according to the received information or by stopping the operation of the assembled battery unit or the power storage device. For example, when it is necessary to maintain the output constant, when an abnormal current is output from the assembled battery unit side, the output can be suppressed or stopped. Furthermore, the operation can be stopped when the output on the assembled battery side becomes weak and a reverse power flow may occur.

  As described above, each assembled battery unit can be started and stopped independently, and a means for transmitting the state to the gateway control device, master control device, and power conditioner 14 which are host systems is provided. . Therefore, it is possible to maintain safety even if an arbitrary number of assembled battery units are connected within a range that does not exceed the information processing amount of the master control device and the gateway control device and the communication line connecting them.

  As a result, a large-scale storage battery device having an arbitrary capacity can be obtained by means that enables the battery pack units that can perform output on / off control independently and that can be connected in parallel.

  3A to 3D are diagrams illustrating a startup sequence when the large-scale storage battery device is started. The power supply 14-1 of the power conditioner 14 is turned on (t1). Then, power is supplied from the power supply device 14-1 to the master control device 80 and each gateway control device 60 (t2). The barrier control device 60 performs self-diagnosis (t3). Self-diagnosis includes input / output data check. Also, some check items, for example, a check item (data table) as to whether or not the voltage at the inspection location is normal, and a tracking check item as to whether or not the data processing routine is normal are prepared. When it is determined that the gate control device 60 is normal as a result of the self-diagnosis, the gateway control device 60 returns a life signal to the master control device 80 (t4). Next, the master control device 80 determines whether or not all the circuit breakers 12-1, 12-2,... 12-n of the battery terminal board 12 are closed (t5).

  Next, the master control device 80 selects an arbitrary storage battery device (battery panel) to be activated first (t6). This selection may be performed first (time t1). And while notifying that the circuit breaker 12-1 is in the closed state to the gate control device 60 of the selected storage battery device (for example, described as 10-1 being selected), the power failure stop / trip (removal) release notification (T7). The power outage stop / trip (removal) release notification is, for example, a notification for canceling the disconnection of the storage battery device 10-1.

  The barrier control device 60 commands to turn on the power to the battery management device 44 of an arbitrary assembled battery unit (for example, 20-1) (t8). Then, the battery management device 44 performs self-diagnosis (t9). The battery management device 44 performs, for example, a check on whether the voltage at the inspection location is normal and a tracking check on whether the data processing routine is normal. When it is determined that the battery management apparatus 44 is normal as a result of the self-diagnosis, the battery management apparatus 44 sends a response indicating that the battery management apparatus 44 is normal to the gateway control apparatus 60 that is waiting for the battery management apparatus to be activated. When the gateway control device 60 recognizes that the battery management device 44 is normal, it instructs the battery management device 44 to perform automatic numbering (t10). The automatic numbering is, for example, identification data unique to the battery management device 44, and the battery management device 44 generates its own identification data by a preset automatic numbering program. Then, the battery management device 44 transmits the unique identification data to the gateway control device 60 together with the numbering completion notification (t11). Thereby, the barrier control device 60 can identify the assembled battery unit 20-1 via the battery management device 44.

  The barrier control device 60 manages the unique identification data of the battery management device 44 and can perform mutual communication with the battery management device 44 (t12). At this time, the gateway control device 60 confirms whether all data scheduled to communicate can be communicated (confirm all CAN communication).

  On the other hand, the battery management device 44 next turns on the power of an arbitrary battery monitoring unit 32 (t13). The battery monitoring unit 32 that has been turned on performs self-diagnosis (t14). The battery monitoring unit 32 performs, for example, a check on whether or not the voltage at the inspection location is normal and a tracking check on whether or not the data processing routine is normal. When it is determined that the battery monitoring unit 32 is normal as a result of the self-diagnosis, the battery monitoring unit 32 returns a normal response to the battery management device 44 waiting for the battery monitoring unit 32 to be activated.

  When recognizing that the battery monitoring unit 32 is normal, the battery management device 44 instructs the battery monitoring unit 32 to perform automatic numbering (t15). The automatic numbering is, for example, unique identification data of the battery monitoring unit 32, and the battery monitoring unit 32 generates its own identification data by a preset automatic numbering program. Then, the battery monitoring unit 32 transmits unique identification data to the battery management device 44 together with the numbering completion notification (t16).

  Thereby, the battery management device 44 can manage the unique identification data of the battery monitoring unit 32 and can perform mutual communication with the battery monitoring unit 32. At this time, it is confirmed whether communication of all data scheduled to be communicated is possible (all CAN communication confirmation). Information such as the temperature of the battery in the battery module and the voltage of the battery can be collected (t17).

  When the mutual communication path with one battery monitoring unit is established, the battery management device 44 instructs the next battery module to automatically number. And while recognizing and managing the specific identification data of each battery module, it communicates between each other. Thus, the battery management device 44 enables mutual communication with the battery monitoring units 32 in all the battery modules 30-1,... 30-21, 30-22.

  There are various methods for assigning identification data to the battery monitoring unit. For example, the battery management device 44 may prepare a plurality of identification data to be assigned to the battery monitoring unit in advance. Then, under the control of the battery management device 44, one identification data among the plurality of identification data may be assigned to each battery monitoring unit. Further, when the battery modules 30-1 to 30-22 are connected to the communication bus line, an address is automatically determined according to the connection location, and this address is used as identification data of the battery monitoring unit 32. Good. Further, a mutual authentication function may be provided between the battery management device 44 and the battery monitoring unit 32, and identification data may be attached to each battery monitoring unit in this authentication process. Further, when the gateway control device 60 assigns the identification data to the battery management device in each assembled battery unit, the same method as described above is adopted. Further, when the master control device 80 assigns identification data to each gateway control device, the same method as described above is adopted.

  When the battery management device 44 becomes capable of mutual communication with the battery monitoring units 32 in all the battery modules 30-1,... 30-21, 30-22, the battery management device 44 -1 is transmitted to the gateway control device 60 (t18).

  In addition, since the process to said procedure t8-t18 is an inspection process, assembled battery unit 20-1 to 20-6 can implement an inspection process uniquely in each inside. However, since the switch circuits of the assembled battery units 20-1 to 20-6 are off, the output of each assembled battery unit is not taken out.

  When the abnormality of the voltage is indicated, the gate control device 60 checks the voltage data of other assembled battery units when recognizing that the assembled battery unit 20-1 is abnormal.

  Further, when the barrier control device 60 recognizes that the assembled battery unit 20-1 is normal, it outputs an operation command to the assembled battery unit 20-1 (t20). In response to this, the battery management device 44 notifies the barrier control device 60 of the preparation flag, and then performs the closing process of the switch circuit 42 (t21). At this time, the gateway control device 60 confirms that the voltage of the bus is zero, and confirms that the assembled battery unit 20-1 is the first activation unit (t19).

  At this time, when the difference between the terminal voltage of the series circuit of the battery module and the voltage of the bus (first charging / discharging terminal) is larger than the threshold value, the battery management device 44 sets the switch S2 connecting the resistor R2 in series. Turn on first. When the difference becomes equal to or less than the threshold, the battery management device 44 turns on the switch S1 and turns off the switch S2.

  Next, the battery management device 44 notifies the gateway control device 60 of the state of the switch circuit 42 and notifies the release of the preparation flag (t22). In response to this notification, the gateway control device 60 transmits the number of operations of the assembled battery unit in the storage battery device 10-1 to the master control device 80 (t23). The master controller 80 notifies the gate controller 60 of the voltage data of the main circuit (t24). The voltage data of the main circuit represents, for example, the output voltage value of the battery terminal board 12 or the output power of the power conditioner 14. When the voltage of the main circuit is equal to or higher than the predetermined threshold value and a restriction command is input from the master control device 80, the gateway control device 60 can stop further activation of the assembled battery unit.

  FIGS. 3C to 3D illustrate a case where the next assembled battery unit (for example, the assembled battery units 20-2 and 20-16) is activated after the assembled battery unit 20-1 is activated, for example, when the system is activated. The operation sequence when the switch circuit is turned on is shown. In addition, in each assembled battery unit, the inspection process and preparation process of previous t8-t18 shall be completed. The barrier control device 60 confirms the remaining assembled battery units (t31). The barrier control device 60 gives an operation command to an arbitrary assembled battery unit (for example, the assembled battery unit 20-2) among the remaining assembled battery units (t32).

  In response to this, the battery management device in the assembled battery unit 20-2 notifies the barrier control device 60 of a preparation flag, and then performs a closing process of the switch circuit in the assembled battery unit 20-2 ( t33). At this time, the battery management device in the assembled battery unit 20-2 has a difference between the terminal voltage of the series circuit of the battery module and the voltage of the bus (first charge / discharge terminal) is smaller than the threshold (already the assembled battery unit Since 20-1 is in an operating state), the switch S1 is turned on.

  Next, the battery management device in the assembled battery unit 20-2 notifies the gateway control device 60 of the state of the switch circuit, and notifies the release of the preparation flag (t34). In response to this notification, the gateway control device 60 transmits the number of operations of the assembled battery unit in the storage battery device 10-2 to the master control device 80 (t35). The master control device 80 notifies the gate control device 60 of the voltage data of the main circuit. Further, the master control device 80 transmits the number of operable storage battery devices to the power conditioner 14 (t36).

  The above-described procedures t31 to t36 are repeated, and the assembled battery units 20-1 to 20-16 in the storage battery device 10-2 are activated. However, limit information on the number of assembled battery units operated from the master controller 80 may be set in the gateway controller 60. At this time, the gateway control device 60 transmits the information to the master control device 80 when the number of activations and the number of operations of the assembled battery unit reaches a specified number.

  The master control device 80 supplies power to the gate control device of the next storage battery device (for example, 10-2) and closes the circuit breaker 12-1 to the gate control device of the selected storage battery device (for example, 10-2). In addition to notifying that it is in a state, a power failure stop / trip (removal) release notification is performed (t41). The power outage stop / trip (removal) release notification is, for example, a notification for canceling that the storage battery device 10-2 is disconnected. The voltage data of the main circuit represents, for example, the output voltage value of the battery terminal board 12 or the output power of the power conditioner 14.

  The gateway control device in the assembled battery unit 20-2 commands to turn on the power to the battery management device in the assembled battery unit 20-2 (t48). Thereafter, a procedure similar to the procedure (t8-t18) in the previous assembled battery unit 20-2 is executed. That is, the battery management device in the assembled battery unit 20-2 performs self-diagnosis (t49). The battery management device in the assembled battery unit 20-2 performs a check to check whether the voltage at the inspection location is normal and a tracking check to determine whether the data processing routine is normal. When it is determined that the battery management device in the assembled battery unit 20-2 is normal as a result of the self-diagnosis, the battery management device returns a response indicating that the battery management device is normal to the gateway control device. When the gateway control device recognizes that the battery management device 44 in the assembled battery unit 20-2 is normal, it instructs the battery management device 44 to perform automatic numbering (t50). The automatic numbering is, for example, unique identification data of the battery management device in the assembled battery unit 20-2, and the battery management device generates its own identification data by a preset automatic numbering program. Then, the battery management device in the assembled battery unit 20-2 transmits the unique identification data to the gateway control device together with the numbering completion notification (t51). Thereby, the gateway control apparatus can identify the assembled battery unit 20-2 via the battery management apparatus.

  The gateway control device manages unique identification data of the battery management device and can perform mutual communication with the battery management device (t52). At this time, the gateway control device checks whether communication of all data scheduled to be communicated is possible (all CAN communication confirmation).

  On the other hand, the battery management device turns on the power supply of the next battery monitoring unit (t53). The battery monitoring unit 32 that has been turned on performs self-diagnosis (t54). The battery monitoring unit performs a check to determine whether the voltage at the inspection location is normal and a tracking check to determine whether the data processing routine is normal. When it is determined that the battery monitoring unit is normal as a result of the self-diagnosis, the battery monitoring unit sends a reply indicating that the battery monitoring unit is normal.

  When recognizing that the battery monitoring unit is normal, the battery management device gives an instruction for automatic numbering to the battery monitoring unit (t55). The automatic numbering is, for example, identification data unique to the battery monitoring unit, and the battery monitoring unit generates its own identification data by a preset automatic numbering program. Then, the battery monitoring unit transmits the unique identification data to the battery management apparatus together with the numbering completion notification (t56).

  Thereby, the battery management apparatus can manage the identification data unique to the battery monitoring unit and perform mutual communication with the battery monitoring unit. At this time, it is confirmed whether communication of all data scheduled to be communicated is possible (all CAN communication confirmation). Information such as the temperature of the battery in the battery module and the voltage of the battery can be collected (t57).

  When the battery management device becomes capable of mutual communication with the battery monitoring units of all battery modules, the battery management device transmits voltage data in the assembled battery unit 20-2 to the gateway control device 60 (t58).

  Next, activation of the assembled battery unit 20-2 starts. In subsequent procedures, procedures t62 to t66 similar to the startup procedures t32 to t36 of the assembled battery unit 20-1 are performed.

  FIG. 4 is a diagram showing an operation procedure when any or all of the large-scale storage battery devices are started and stopped. Any or all of the circuit breakers 12-1 to 12-n are manually opened. This state is detected by the master controller 80. The master control device 80 notifies the power conditioner 14 of the number of storage battery devices that can be operated (t71).

  The master control device 80 notifies the barrier control device (for example, 60) of the corresponding storage battery device that the circuit breaker is “open” (t72). Then, the gateway control device 60 transmits an operation stop command to the corresponding battery management device 44 via the communication bus line (t73). The battery management device 44 executes “open” of the corresponding switch circuit 42 and turns off the power of each battery monitoring unit 33 (t74). When the battery management device 44 confirms that the power supply of each battery monitoring unit 33 is turned off, the battery management device 44 notifies the barrier control device 60 that the switch circuit 42 is “open” (t75). Then, the gateway control device 60 turns off the battery management device 44 (t76). The barrier control device 60 controls the next assembled battery unit 20-2 in the same manner as the assembled battery unit 20-1, and stops the assembled battery unit 20-2. When the assembled battery units are stopped one after another in this way, the gateway control device 60 notifies the master control device 80 that the operation of the storage battery device 10-1 has stopped (t77).

  When the master control device 80 recognizes that the operation of all the storage battery devices has stopped in the above procedure, for example, the master control device 80 turns on a stop lamp. As a result, the power conditioner 14 performs power-off processing (may be manual), and power-off to the master control device and the gateway control device (t78).

  FIG. 5 shows an operation procedure when an abnormality (overcharge) occurs in the battery voltage in the battery module. The battery monitoring unit measures the battery voltage and notifies the result to a battery management device (for example, 44) (t81, t82). The battery management device 44 determines whether or not the overcharge voltage value is within the set voltage range (t83). This determination is made, for example, when the overcharge voltage value is in an abnormal state such that the assembled battery unit must be removed, or is a voltage that does not require removal of the assembled battery unit (within a setting range that is not extremely abnormal voltage). Judging whether there is. The reference for this determination is set in advance in the battery management device.

  If the overcharge voltage value is a voltage within the set range, the battery management device 44 transmits determination information related to the overcharge battery to the gateway control device 60 (t84). Further, the battery management device 44 executes “open” processing of the corresponding switch circuit 42. Further, the battery management device 44 stores information (log) indicating that the switch circuit 42 is “opened” due to the presence of an overcharged battery, and notifies the gateway control device 60 that the switch circuit 42 is “open”. (T87). The gateway control device 60 notifies the master control device 80 of the information on the overcharged battery, the notification of the switch circuit 42 “open”, the notification of the identification data of the assembled battery unit in which the problem has occurred, and the operable assembled battery unit. The number is notified (t88). Then, the master control device 80 notifies the number of battery modules that can be operated to the power conditioner 14.

  The power conditioner 14 receives the above various reports and displays a light failure state on the display.

  On the other hand, the battery management device 44 instructs the battery monitoring unit in the target battery module to balance the voltage between the overcharged battery and the other battery (t91). The battery monitoring unit includes an equalization processing circuit that equalizes terminal voltages of a plurality of batteries. In the equalization process, the overcharged battery is discharged and adjusted to the same potential as other batteries. When the battery voltage in the target battery module returns to the normal state, the battery monitoring unit notifies the battery management device that the target battery module is in a normal state (t92). This time, the battery management device determines whether or not the battery voltage balance is obtained among the plurality of battery modules, and issues an operation command to all the battery monitoring units in charge to carry out the equalization processing of the entire battery voltage. Is output (t93).

  FIG. 6 shows an operation procedure when an overcharge that requires replacement of the battery occurs in the battery voltage in the battery module. The battery monitoring unit measures the battery voltage and notifies the result to a battery management device (for example, 44) (t101, t102). Now, it is assumed that the battery management device 44 determines that the overcharge voltage value is in such an abnormal state that the assembled battery unit (or battery module) must be removed (t103).

  The battery management device 44 determines a battery to be removed and a battery module including the battery, and stores the information. Furthermore, the battery management device 44 transmits trip (detachment) request data to the gateway control device 60 together with the identification data of the assembled battery unit 20-1 to which it belongs (t105). The barrier control device 60 transmits the identification information of the assembled battery unit (and / or the battery module) to be removed to the master control device 80 together with the trip request data (t106). The master controller 80 transmits the received identification information of the part to be removed to the power conditioner 14 together with the trip request data (t107). The power conditioner 14 determines that the information from the master control device 80 is information on a serious failure, for example, an emergency lamp so that the circuit breaker 12-1 of the corresponding storage battery device (for example, 10-1) is “open”. Blinks.

  In this case, the circuit breaker 12-1 may be automatically “opened”. Further, the battery management device 44 refers to the previously stored information so as not to perform the “close” processing of the switch circuit 42 until necessary maintenance work, for example, replacement of the battery module in which the above has occurred is performed. It may be configured.

  On the other hand, in the assembled battery unit in which the battery is overcharged, equalization processing is performed to obtain a balance of the battery voltage (t110, t111, t112). When the battery voltage in the target battery module returns to the normal state, the battery monitoring unit notifies the battery management device that the target battery module is in a normal state. The battery management device gives a command to the battery monitoring unit to stop the battery voltage equalization process.

  FIG. 7 shows a processing procedure when the temperature of the battery module rises above a preset threshold value. The battery monitoring unit notifies the battery management device of the information (battery and battery module identification data) when the temperature of the battery module being handled rises above the threshold (t121, t122).

  The battery management device recognizes the abnormal battery module (t123), and transmits the identification data of the abnormal battery module to the gateway control device (t124). Further, the battery management device switches the corresponding switch circuit to “open” (t125), and stores a log that the switch circuit is “open” (t126). Then, the gateway control device is notified that the switch circuit is “open” (t127).

  The barrier control device, in the assembled battery unit that is abnormal, the identification data of the battery that is overtemperature, the switch circuit is "open", the identification data of the assembled battery unit, The master controller is notified of the total number of units, output, or remaining capacity (t128). Or you may calculate the number of the assembled battery units which can be drive | operated now, and may notify these to a master control apparatus. Receiving this notification, the master control device calculates the number of battery pack units that can be operated at present and notifies the power conditioner (t129).

  In said embodiment, the some storage battery apparatus 10-1, 10-2, ... demonstrated the system with which it combined. However, it may be a large-scale storage battery device in which a single storage battery device is used.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10-1, 10-2, 10-n ... storage battery device, 12 ... battery terminal board, 21-1, 12-2, 12-n ... breaker, 14 ... power conditioner, 20-1, 20-2, 20-16 ... assembled battery unit, 30-1, 30-21, 30-22 ... battery module, 32 ... battery monitoring unit, 44 ... battery management device 51 ... 1st charge / discharge terminal, 52 ... 2nd charge / discharge terminal, 60 ... Gateway control apparatus, 80 ... Master control apparatus.

Claims (11)

  1. A battery module including a plurality of batteries connected in series and a battery monitoring unit that monitors voltages and temperatures of the batteries;
    A battery module circuit in which a plurality of the battery modules are connected in series;
    A current sensor for detecting a current flowing in the battery module circuit;
    A charging / discharging path provided in either or both of a path connecting the positive terminal of the series battery module circuit to the positive charge / discharge terminal and a path connecting the negative terminal of the series battery module circuit to the negative charge / discharge terminal. A switch circuit for turning on or off;
    A battery management device that determines monitoring data from a plurality of battery monitoring units and detection data of the current sensor, controls the switch circuit based on a determination result, and outputs notification data;
    A plurality of assembled battery units each including the battery module circuit, the current sensor, the switch circuit, and the battery management device;
    A gateway control device that performs mutual communication with the plurality of battery management devices in the plurality of assembled battery units connected to the plurality of assembled battery units,
    Each of the plurality of battery management devices refers to monitoring data sent from a battery monitoring unit to be managed and / or measurement data sent from a current sensor to determine a preset abnormal state The switch circuit in the assembled battery unit causing the abnormality is turned off, and the assembled battery unit is disconnected from the connected state to the other assembled battery unit. A storage battery device that performs notification.
  2. Each of the plurality of battery management devices includes a switch corresponding to the battery monitoring unit when the monitoring data from the battery monitoring unit to be managed indicates that an overcharged battery is present and the voltage is within a predetermined range. The circuit is turned off, the associated assembled battery unit is disconnected, and the battery module including the overcharged battery is equalized so that the battery voltages of the plurality of batteries are substantially equal. The storage battery device according to claim 1 which instructs to do so.
  3. Each of the plurality of battery management devices, when the monitoring data from the corresponding battery monitoring unit indicates that an overcharged battery is present and its voltage is equal to or higher than a predetermined value, turns off the corresponding switch circuit and belongs 2. The storage battery device according to claim 1, wherein the assembled battery unit is put in a disconnected state, and a notification for requesting removal of the abnormal battery module of the associated assembled battery unit is made to the corresponding gateway control device.
  4. When the monitoring data from the corresponding battery monitoring unit indicates that there is an over-temperature battery module, each of the plurality of battery management devices turns off the corresponding switch circuit and disconnects the associated assembled battery unit. The storage battery device according to claim 1, wherein the storage battery device is in a state and notifies the corresponding gateway control device of an abnormality.
  5. 2. The storage battery device according to claim 1, wherein each of the plurality of battery management devices notifies the gateway control device of a state of the switch circuit when the corresponding switch circuit is turned off.
  6. Furthermore, the circuit breaker which makes the said positive electrode charging / discharging terminal and the said negative electrode charging / discharging terminal the state connected or disconnected with respect to the power conditioner,
    The storage battery device according to claim 1, further comprising a master control device that transmits state information of the circuit breaker to a corresponding gateway control device.
  7. The storage battery device according to claim 6, wherein the power conditioner executes power output limitation and / or operation stop of the assembled battery unit for safety in accordance with information from the barrier control device and / or the master control device.
  8. The storage battery device according to claim 6, wherein the gateway control device notifies the master control device of the number of operating units of the assembled battery unit under control, or the total of any output and remaining capacity. .
  9. A battery module including a plurality of batteries connected in series and a battery monitoring unit that monitors voltages and temperatures of the batteries;
    A battery module circuit in which a plurality of the battery modules are connected in series;
    A current sensor for detecting a current flowing in the battery module circuit;
    A charging / discharging path provided in either or both of a path connecting the positive terminal of the series battery module circuit to the positive charge / discharge terminal and a path connecting the negative terminal of the series battery module circuit to the negative charge / discharge terminal. A switch circuit for turning on or off;
    A battery management device that determines monitoring data from a plurality of battery monitoring units and detection data of the current sensor, controls the switch circuit based on a determination result, and outputs notification data;
    A plurality of assembled battery units each including the battery module circuit, the current sensor, the switch circuit, and the battery management device;
    An operation method of a power storage device including a barrier control device that performs mutual communication with a plurality of the battery management devices in the plurality of assembled battery units connected to the plurality of assembled battery units,
    When the switch circuit is in an OFF state and an activation signal is supplied to the gateway control device, the gateway control device activates each battery management device in the plurality of assembled battery units, and via a communication bus. An operation method of a storage battery device that provides identification data to each battery management device.
  10.   Each battery management device in the assembled battery unit activates each battery management unit in the assembled battery unit under management and gives identification data to each battery management unit via a communication bus. The operation method of the storage battery device according to 9.
  11. In the switch circuit, a first switch having no resistor and a switch having a resistor in series are connected in parallel.
    The battery management device operating method according to claim 9, wherein the battery management device turns on the second switch first and turns on the first switch at an arbitrary time when the assembled battery unit is activated.
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