JP2021002976A - Power storage device - Google Patents

Power storage device Download PDF

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JP2021002976A
JP2021002976A JP2019116707A JP2019116707A JP2021002976A JP 2021002976 A JP2021002976 A JP 2021002976A JP 2019116707 A JP2019116707 A JP 2019116707A JP 2019116707 A JP2019116707 A JP 2019116707A JP 2021002976 A JP2021002976 A JP 2021002976A
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power
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secondary batteries
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JP7336890B2 (en
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良平 村山
Ryohei Murayama
良平 村山
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Furukawa Battery Co Ltd
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    • 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
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Abstract

To provide a power storage device in which preferable operation of a secondary battery accommodated therein can be performed.SOLUTION: A power supply section 2 comprises 10 secondary batteries 2a1-2a10 of the same type connected in parallel, and supplies power from the secondary batteries 2a1-2a10 to a load 9. The secondary batteries 2a1-2a10 are accommodated in 10 secondary battery modules 21-210, respectively, and BMU 2b1-2b10 are connected to the secondary batteries 2a1-2a10, respectively. A battery number determination table in a storage section 4 stores an estimated rated power consumption of the load 9 and the number of secondary batteries to be used, corresponding to each range of amount of power measured by an electric power measurement section 7. A control section 3 controls a connection switching section 5 to switch the number of the secondary batteries 2a1-2a10 connected in parallel in the power supply section 2 to the number of the secondary batteries 2a1-2a10 stored in the battery number determination table corresponding to a range to which the amount of power measured by an electric power measurement section 7 belongs.SELECTED DRAWING: Figure 1

Description

本発明は、同一種類の複数の二次電池によって構成される給電部から負荷へ電力を供給する蓄電装置に関し、特に、負荷へ接続する二次電池の運用に特徴を有する蓄電装置に関する。 The present invention relates to a power storage device that supplies electric power to a load from a power supply unit composed of a plurality of secondary batteries of the same type, and more particularly to a power storage device characterized by the operation of a secondary battery connected to the load.

蓄電装置は、同一種類の複数の二次電池を収容して、負荷に電力を供給するものである。この蓄電装置により、商用電源を必要とする負荷がその使用場所の制約を受けることがなくなり、これまで負荷の設置が困難であった場所で、負荷の一時的な需要等にも対処することが可能となる。 The power storage device accommodates a plurality of secondary batteries of the same type and supplies electric power to the load. With this power storage device, loads that require commercial power are no longer restricted by the place of use, and it is possible to deal with temporary demand for loads in places where it was difficult to install loads. It will be possible.

従来、この種の二次電池の運用に関する技術として、例えば、特許文献１や特許文献２に開示された技術がある。 Conventionally, as a technique related to the operation of this type of secondary battery, for example, there is a technique disclosed in Patent Document 1 and Patent Document 2.

特開２０１２−２０５４８０号公報Japanese Unexamined Patent Publication No. 2012-205480 特開２０１３−１７２５６７号公報Japanese Unexamined Patent Publication No. 2013-172567

従来、例えば、自動販売機のような負荷に上記の蓄電装置によって電力を供給する場合、複数種類の自動販売機がそれぞれ異なる定格の消費電力量等を持つのにも関わらず、蓄電装置が収容する全ての二次電池から負荷に電力が供給されていた。 Conventionally, when power is supplied to a load such as a vending machine by the above-mentioned power storage device, the power storage device accommodates the power storage device even though the plurality of types of vending machines have different rated power consumption and the like. Power was supplied to the load from all the secondary batteries.

したがって、全ての二次電池は負荷の稼働時に常に電力を負荷に供給し続ける状態にあり、全ての二次電池に常にストレスがかかって、二次電池の好ましい運用がなされていなかった。 Therefore, all the secondary batteries are in a state of constantly supplying electric power to the load when the load is operating, and all the secondary batteries are constantly stressed, so that the secondary batteries are not operated favorably.

また、工事による停電や計画停電等の際に、商用電源からの電力の供給を受けることを前提とする負荷に上記の蓄電装置によって電力を供給しようとする場合、工事が開始されてから終了するまでの期間にわたり、電力を供給し続けることが求められる。このため、当該蓄電装置に収容される二次電池の運用においても、工事による停電や計画停電等の際に、上記と同様な問題があり、二次電池の好ましい運用が望まれる。 In addition, in the event of a power outage due to construction work or a planned power outage, if the above power storage device is to supply power to a load that is premised on receiving power from a commercial power source, the work will end after the work starts. It is required to continue to supply power for the period until. Therefore, even in the operation of the secondary battery housed in the power storage device, there is a problem similar to the above in the event of a power outage due to construction work, a planned power outage, or the like, and preferable operation of the secondary battery is desired.

本発明はこのような課題を解決するためになされたもので、
同一種類の複数の二次電池が並列に接続されて構成され、二次電池から負荷へ電力を供給する給電部と、
各二次電池と負荷との間の接続を切り替える接続切替部と、
給電部から負荷へ供給される電力量を測定する電力測定部と、
電力測定部によって測定される電力量の各範囲に対応して二次電池の使用すべき数を記憶する記憶部と、
接続切替部を制御して、給電部において並列接続される二次電池の数を、電力測定部で測定される電力量が属する範囲に対応して記憶部に記憶される二次電池の数に切り替える制御部と
を備え、蓄電装置を構成した。 The present invention has been made to solve such a problem.
A power supply unit that is configured by connecting multiple secondary batteries of the same type in parallel and supplies power from the secondary batteries to the load.
A connection switching unit that switches the connection between each secondary battery and the load,
A power measuring unit that measures the amount of power supplied from the power supply unit to the load,
A storage unit that stores the number of secondary batteries to be used corresponding to each range of electric power measured by the power measurement unit, and a storage unit.
By controlling the connection switching unit, the number of secondary batteries connected in parallel in the power supply unit is changed to the number of secondary batteries stored in the storage unit according to the range to which the amount of power measured by the power measurement unit belongs. A power storage device was configured with a control unit for switching.

本構成によれば、給電部において並列接続される二次電池の数は、制御部の接続切替部に対する制御により、電力測定部で測定される電力量が属する範囲に対応して記憶部に記憶される二次電池の数に切り替えられる。したがって、給電部において並列接続される二次電池の数は、負荷が消費する電力量に応じた適切な数に設定される。このため、負荷の種類によっては、給電部における全ての二次電池を使用しなくても負荷を稼働させることが出来、その際未使用の二次電池を待機させることができ、その結果、二次電池の好ましい運用が可能となる。 According to this configuration, the number of secondary batteries connected in parallel in the power feeding unit is stored in the storage unit according to the range to which the electric energy measured by the power measuring unit belongs by controlling the connection switching unit of the control unit. It can be switched to the number of secondary batteries to be used. Therefore, the number of secondary batteries connected in parallel in the power feeding unit is set to an appropriate number according to the amount of power consumed by the load. Therefore, depending on the type of load, the load can be operated without using all the secondary batteries in the power feeding unit, and at that time, the unused secondary batteries can be put on standby, and as a result, the second battery can be operated. Preferable operation of the next battery becomes possible.

また、本発明は、
各二次電池の端子間電圧を測定する電池電圧測定部を備え、
制御部が、接続切替部によって負荷に接続されている二次電池のいずれかについて電池電圧測定部によって測定される電圧が放電終止電圧に達すると、負荷に接続されていなかった所定の二次電池を負荷に接続する切り替え制御を接続切替部に対して行うことを特徴とする。 In addition, the present invention
Equipped with a battery voltage measuring unit that measures the voltage between terminals of each secondary battery
When the voltage measured by the battery voltage measuring unit for any of the secondary batteries connected to the load by the control unit reaches the discharge end voltage, the predetermined secondary battery that was not connected to the load It is characterized in that switching control for connecting to a load is performed on the connection switching unit.

収容する全ての二次電池から負荷に電力が供給される従来の蓄電装置では、いずれかの二次電池の端子間電圧が放電終止電圧に達すると、蓄電装置から負荷への電力供給を一旦停止し、蓄電装置が収容する二次電池を充電したり、充電された別の新たな二次電池に交換する必要があった。このため、その間、負荷の稼働が余儀なく停止される。しかし、本構成によれば、負荷に接続されている二次電池のいずれかが放電終止電圧に達したことが、電池電圧測定部の測定によって判明すると、制御部の接続切替部に対する切り替え制御により、負荷に接続されていなかった所定の二次電池が負荷に接続される。 In the conventional power storage device in which power is supplied to the load from all the accommodating secondary batteries, when the voltage between the terminals of any of the secondary batteries reaches the discharge end voltage, the power supply from the power storage device to the load is temporarily stopped. However, it was necessary to charge the secondary battery contained in the power storage device or replace it with another charged secondary battery. Therefore, during that time, the operation of the load is inevitably stopped. However, according to this configuration, when it is found by the measurement of the battery voltage measuring unit that one of the secondary batteries connected to the load has reached the discharge end voltage, the switching control of the control unit with respect to the connection switching unit is performed. , A predetermined secondary battery that was not connected to the load is connected to the load.

したがって、負荷へは、負荷に接続されていなかった所定の二次電池から電力が供給し続けられ、従来の蓄電装置のように負荷への電力供給を一旦停止する必要はない。このため、負荷に対して安定して電力を供給することが可能となり、蓄電装置に収容される二次電池の好ましい運用を持続して行うことができる。 Therefore, power is continuously supplied to the load from a predetermined secondary battery that is not connected to the load, and it is not necessary to temporarily stop the power supply to the load as in the conventional power storage device. Therefore, it is possible to stably supply electric power to the load, and it is possible to continuously perform preferable operation of the secondary battery housed in the power storage device.

また、本発明は、制御部が、給電部から負荷へ電力が供給され始めた直後に電力測定部によって測定される電力量に対応する数の二次電池を負荷に接続する切替制御を、給電部から負荷へ電力が供給され始めた直後に接続切替部に対して行うことを特徴とする。 Further, in the present invention, the control unit supplies power to the load by switching control for connecting a number of secondary batteries corresponding to the amount of electric power measured by the power measurement unit to the load immediately after the power supply unit starts supplying power to the load. It is characterized in that it is performed to the connection switching unit immediately after the power starts to be supplied from the unit to the load.

本構成によれば、給電部における二次電池の並列接続数は、給電部から負荷へ電力が供給され始めた直後に、負荷の消費電力に応じた数に制御部によって切り替えられる。このため、給電部から負荷へ電力が供給され始めて時間が経ってから、二次電池の並列接続数が適切な数に切り替えられる場合に比較して、二次電池の好ましい運用に資することになる。 According to this configuration, the number of parallel connections of the secondary batteries in the power supply unit is switched by the control unit to a number according to the power consumption of the load immediately after the power supply unit starts to supply power to the load. For this reason, it contributes to the preferable operation of the secondary battery as compared with the case where the number of parallel connections of the secondary battery is switched to an appropriate number after a lapse of time after the power is supplied from the power supply unit to the load. ..

また、本発明は、給電部が、負荷の稼働時にいずれかの二次電池が負荷に接続されて負荷の稼働時に負荷へ電力を常時供給することを特徴とする。 Further, the present invention is characterized in that the power feeding unit is connected to any secondary battery during the operation of the load and constantly supplies electric power to the load when the load is operating.

本構成によれば、負荷の設置が困難であった場所でも負荷に電力を供給でき、しかも、収容する二次電池の好ましい運用を行える蓄電装置が提供される。 According to this configuration, there is provided a power storage device that can supply electric power to the load even in a place where it is difficult to install the load, and can perform preferable operation of the secondary battery to be accommodated.

本発明によれば、上記のように、収容する二次電池の好ましい運用を行える蓄電装置が提供される。 According to the present invention, as described above, there is provided a power storage device capable of preferably operating the accommodating secondary battery.

本発明の一実施の形態による蓄電装置の概略構成を示すブロック図である。It is a block diagram which shows the schematic structure of the power storage device by one Embodiment of this invention. 図１に示す蓄電装置の記憶部に記憶される電池数決定テーブルを示す図である。It is a figure which shows the battery number determination table stored in the storage part of the power storage device shown in FIG. 図１に示す蓄電装置の記憶部に記憶される電池管理テーブルを示す図である。It is a figure which shows the battery management table which is stored in the storage part of the power storage device shown in FIG. 図１に示す蓄電装置の動作を表わすフローチャートである。It is a flowchart which shows the operation of the power storage device shown in FIG.

次に、本発明の一実施の形態による蓄電装置について説明する。 Next, the power storage device according to the embodiment of the present invention will be described.

図１は、この一実施の形態による蓄電装置１の概略構成を示すブロック図である。蓄電装置１は、給電部２、制御部３、記憶部４、接続切替部５、ＤＣ／ＡＣ変換部６および電力測定部７から構成される。 FIG. 1 is a block diagram showing a schematic configuration of a power storage device 1 according to this embodiment. The power storage device 1 includes a power supply unit 2, a control unit 3, a storage unit 4, a connection switching unit 5, a DC / AC conversion unit 6, and a power measurement unit 7.

給電部２は、同一種類の１０個のリチウムイオン二次電池２a1〜２a10が並列に接続されて構成され、二次電池２a1〜２a10から負荷９へ電力を供給する。本実施形態では負荷９として自動販売機が蓄電装置１に接続されており、給電部２から負荷９へその動作電力が供給される。二次電池２a1〜２a10は１０個の二次電池モジュール２１〜２１０のそれぞれに収容されており、各二次電池２a1〜２a10にはそれぞれバッテリ・マネジメント・ユニット（Ｂattery Ｍanagement Ｕnit：ＢＭＵ）２b1〜２b10が接続されている。各ＢＭＵ２b1〜２b10は、同じ二次電池モジュール２１〜１２１０が収容する各二次電池２a1〜２a10の端子間電圧、出力電流、温度および充電率（Ｓtate Ｏf Ｃharge：ＳＯＣ） をそれぞれ常時測定し、制御部３へ出力する。ＳＯＣは例えば各二次電池２a1〜２a10の出力電流値が積算することで得られる。 The power feeding unit 2 is configured by connecting 10 lithium ion secondary batteries 2a1 to 2a10 of the same type in parallel, and supplies power from the secondary batteries 2a1 to 2a10 to the load 9. In the present embodiment, the vending machine is connected to the power storage device 1 as the load 9, and the operating power is supplied from the power feeding unit 2 to the load 9. The secondary batteries 2a1 to 2a10 are housed in each of the ten secondary battery modules 2 1 to 2 10 , and each of the secondary batteries 2a1 to 2a10 has a battery management unit (Battery Management Unit: BMU) 2b1. ~ 2b10 is connected. Each BMU 2b1 to 2b10 constantly measures the voltage, output current, temperature, and charge rate (State Of Charge: SOC) between the terminals of each of the secondary batteries 2a1 to 2a10 accommodated in the same secondary battery modules 2 1 to 12 10. , Output to the control unit 3. The SOC can be obtained, for example, by integrating the output current values of the secondary batteries 2a1 to 2a10.

制御部３はＭＰＵ（Micro Processing Unit）等からなり、記憶部４はＲＯＭ（Read Only Memory）やＲＡＭ（Random Access Memory）等からなる。ＲＯＭにはＭＰＵ等の動作手順を規定するプログラムや、各種データが記憶されている。制御部３は、記憶部４のＲＯＭに記憶されたプログラムにしたがい、ＲＡＭを一時記憶作業領域として各部の制御を行う。また、本実施の形態では、ＲＡＭには図２に示す電池数決定テーブルや図３に示す電池管理テーブルが記憶されている。 The control unit 3 is composed of an MPU (Micro Processing Unit) or the like, and the storage unit 4 is composed of a ROM (Read Only Memory), a RAM (Random Access Memory) or the like. A program that defines an operation procedure such as an MPU and various data are stored in the ROM. The control unit 3 controls each unit using the RAM as a temporary storage work area according to the program stored in the ROM of the storage unit 4. Further, in the present embodiment, the RAM stores the battery number determination table shown in FIG. 2 and the battery management table shown in FIG.

電力測定部７は給電部８から負荷９へ供給される電力量を測定する。図２に示す電池数決定テーブルは、この電力測定部７によって測定される電力量の各範囲に対応して、負荷９の推定される定格消費電力量および二次電池の使用すべき数を記憶している。本実施形態では、ｗ１以上ｗ２未満（ｗ１〜ｗ２）の測定電力量の範囲に対応して、負荷９の推定される定格消費電力Ｗn1、使用すべき電池の数５を記憶し、ｗ２以上ｗ３未満（ｗ２〜ｗ３）の測定電力量の範囲に対応して、負荷９の推定される定格消費電力Ｗn2、使用すべき電池の数１０を記憶している。 The power measuring unit 7 measures the amount of power supplied from the power feeding unit 8 to the load 9. The battery number determination table shown in FIG. 2 stores the estimated rated power consumption of the load 9 and the number of secondary batteries to be used corresponding to each range of the power amount measured by the power measurement unit 7. doing. In the present embodiment, the estimated rated power consumption Wn1 of the load 9 and the number of batteries 5 to be used are stored corresponding to the range of the measured electric energy of w1 or more and less than w2 (w1 to w2), and w2 or more and w3. The estimated rated power consumption Wn2 of the load 9 and the number of batteries to be used 10 are stored corresponding to the range of the measured electric energy less than (w2 to w3).

また、図３に示す電池管理テーブルには、各二次電池２a1〜２a10の使用状態、各ＢＭＵ２b1〜２b10が測定する端子間電圧、出力電流、温度およびＳＯＣが記憶されている。この電池管理テーブルでは、各二次電池２a1〜２a10に電池Ｎｏ．１〜Ｎｏ．１０が付与されており、各二次電池２a1〜２a10は電池Ｎｏ．１〜Ｎｏ．１０で識別されて管理される。 Further, in the battery management table shown in FIG. 3, the usage state of each of the secondary batteries 2a1 to 2a10, the voltage between terminals measured by each of the BMUs 2b1 to 2b10, the output current, the temperature, and the SOC are stored. In this battery management table, each secondary battery 2a1 to 2a10 has a battery number. 1-No. 10 is given, and each of the secondary batteries 2a1 to 2a10 has a battery No. 1-No. It is identified and managed by 10.

図３に示す電池管理テーブルでは、電池Ｎｏ．１〜Ｎｏ．５の各二次電池２a1〜２a5の使用状態が使用中、電池Ｎｏ．６〜Ｎｏ．１０の各二次電池２a6〜２a10の使用状態が休止中になっている。また、電池Ｎｏ．１〜Ｎｏ．１０の各二次電池２a1〜２a10の端子間電圧がＶ１〜Ｖ１０[Ｖ]、出力電流がＩ１〜Ｉ１０[Ａ]、温度がＴ１〜Ｔ１０[℃]、ＳＯＣがＳ１〜Ｓ１０[％] となっている。これらのテーブル値は各ＢＭＵ２b1〜２b10が測定する毎に更新されて、常に各二次電池２a1〜２a10の最新の値になっている。ここで、各ＢＭＵ２b1〜２b10は、各二次電池２a1〜２a10の端子間電圧を測定する電池電圧測定部を構成している。 In the battery management table shown in FIG. 3, the battery No. 1-No. When each of the secondary batteries 2a1 to 2a5 of No. 5 is in use, the battery No. 6 to No. The usage state of each of the secondary batteries 2a6 to 2a10 of 10 is inactive. In addition, the battery No. 1-No. The voltage between the terminals of each of the 10 secondary batteries 2a1 to 2a10 is V 1 to V 10 [V], the output current is I 1 to I 10 [A], the temperature is T 1 to T 10 [° C], and the SOC is S 1 It is ~ S 10 [%]. These table values are updated every time each BMU2b1 to 2b10 measures, and are always the latest values of each secondary battery 2a1 to 2a10. Here, each BMU 2b1 to 2b10 constitutes a battery voltage measuring unit that measures the voltage between terminals of each secondary battery 2a1 to 2a10.

制御部３は、接続切替部５を制御して、給電部２において並列接続される二次電池２a1〜２a10の数を、電力測定部７で測定される電力量が属する範囲に対応して記憶部４の電池数決定テーブルに記憶される二次電池２a1〜２a10の数に切り替える。接続切替部５はリレースイッチから構成され、制御部３の制御にしたがい、各二次電池２a1〜２a10と負荷９との間の接続を切り替える。ＤＣ／ＡＣ変換部６は、接続切替部５によって負荷９に接続される二次電池２a1〜２a10から出力される直流電力を交流電力に変換し、負荷９へ出力する。負荷９はこの交流電力の供給を受けて動作する。 The control unit 3 controls the connection switching unit 5 and stores the number of the secondary batteries 2a1 to 2a10 connected in parallel in the power supply unit 2 according to the range to which the electric energy measured by the power measurement unit 7 belongs. The number of secondary batteries 2a1 to 2a10 stored in the battery number determination table of Part 4 is switched. The connection switching unit 5 is composed of a relay switch, and switches the connection between each of the secondary batteries 2a1 to 2a10 and the load 9 according to the control of the control unit 3. The DC / AC conversion unit 6 converts the DC power output from the secondary batteries 2a1 to 2a10 connected to the load 9 by the connection switching unit 5 into AC power and outputs the DC power to the load 9. The load 9 operates by receiving the supply of this AC power.

図４は、蓄電装置１の動作を表わすフローチャートである。 FIG. 4 is a flowchart showing the operation of the power storage device 1.

蓄電装置１は、負荷９に併設されると、制御部３の接続切替部５に対する制御により、最初に、全ての二次電池２a1〜２a10を負荷９に接続する（図４、ステップ１０１参照）。したがって、蓄電装置１の負荷９への併設時、全ての二次電池２a1〜２a10から出力される直流電力がＤＣ／ＡＣ変換部６によって交流電力に変換されて、負荷９へ供給される。 When the power storage device 1 is attached to the load 9, all the secondary batteries 2a1 to 2a10 are first connected to the load 9 by the control of the connection switching unit 5 of the control unit 3 (see FIG. 4, step 101). .. Therefore, when the power storage device 1 is attached to the load 9, the DC power output from all the secondary batteries 2a1 to 2a10 is converted into AC power by the DC / AC conversion unit 6 and supplied to the load 9.

次に、制御部３は、ＤＣ／ＡＣ変換部６から負荷９へ供給される電力量、つまり、負荷９で消費される電力量を電力測定部７によって測定する（ステップ１０２参照）。この際、制御部３は、ＢＭＵ２b1〜２b10によって測定される二次電池２a1〜２a10の電圧および電流から、負荷９で消費される電力量を測定すると、蓄電装置１内で消費される電力量も併せて測定することになるため、ＤＣ／ＡＣ変換部６から負荷９へ供給される電力量を電力測定部７によって直接測定する。次に、制御部３は、図２に示す電池数決定テーブルを参照し、電力測定部７によって測定される負荷９への供給電力量がｗ１〜ｗ２の範囲にあるか否か、つまり、負荷９の推定される定格消費電力量がＷn1で、使用すべき二次電池２a1〜２a10の数が５個であるか否か、判断する（ステップ１０３参照）。 Next, the control unit 3 measures the amount of power supplied from the DC / AC conversion unit 6 to the load 9, that is, the amount of power consumed by the load 9 by the power measurement unit 7 (see step 102). At this time, when the control unit 3 measures the amount of power consumed by the load 9 from the voltage and current of the secondary batteries 2a1 to 2a10 measured by the BMUs 2b1 to 2b10, the amount of power consumed in the power storage device 1 is also obtained. Since the measurement is performed at the same time, the amount of electric power supplied from the DC / AC conversion unit 6 to the load 9 is directly measured by the electric power measuring unit 7. Next, the control unit 3 refers to the battery number determination table shown in FIG. 2, and whether or not the amount of power supplied to the load 9 measured by the power measurement unit 7 is in the range of w1 to w2, that is, the load. It is determined whether or not the estimated rated power consumption of 9 is Wn1 and the number of secondary batteries 2a1 to 2a10 to be used is five (see step 103).

負荷９への供給電力量がｗ１〜ｗ２の範囲になくてステップ１０３の判断結果がＮｏである場合、制御部３は、負荷９への供給電力量がｗ２〜ｗ３の範囲にあり、負荷９の推定される定格消費電力量がＷn2で、使用すべき二次電池２a1〜２a10の数が１０個であると判断する。そして、次に、１０個の二次電池２a1〜２a10を負荷９に接続したままの状態にする（ステップ１０４参照）。この際、制御部３は、図３に示す電池管理テーブル中における使用状態をこの切替制御に応じた内容に書き換え、全ての二次電池２a1〜２a10の使用状態を使用中にする。 When the amount of power supplied to the load 9 is not in the range of w1 to w2 and the determination result in step 103 is No, the control unit 3 has the amount of power supplied to the load 9 in the range of w2 to w3 and the load 9 It is determined that the estimated rated power consumption of is Wn2 and the number of secondary batteries 2a1 to 2a10 to be used is 10. Then, the ten secondary batteries 2a1 to 2a10 are left connected to the load 9 (see step 104). At this time, the control unit 3 rewrites the usage state in the battery management table shown in FIG. 3 to the contents corresponding to this switching control, and makes all the usage states of the secondary batteries 2a1 to 2a10 in use.

次に、制御部３は、図３に示す電池管理テーブルを参照し、負荷９に接続されている１０個の二次電池２a1〜２a10のなかのいずれかの端子間電圧が、放電終止電圧に達したか否かを判断する（ステップ１０５参照）。いずれの二次電池２a1〜２a10の端子間電圧も放電終止電圧に達しておらず、ステップ１０５の判断結果がＮｏである場合、制御部３はステップ１０５の処理を繰り返す。その後、いずれかの二次電池２a1〜２a10の端子間電圧が放電終止電圧に達し、ステップ１０５の判断結果がＹｅｓになると、制御部３は、接続切替部５を制御して全ての二次電池２a1〜２a10と負荷９との間の接続を切り離し、処理を終了する。したがって、蓄電装置１から負荷９への電源供給が一旦停止され、給電部２に収容される二次電池２a1〜２a10が充電されるか、別の新たな二次電池に二次電池２a1〜２a10が交換されることになる。 Next, the control unit 3 refers to the battery management table shown in FIG. 3, and the voltage between terminals of the ten secondary batteries 2a1 to 2a10 connected to the load 9 becomes the discharge end voltage. It is determined whether or not it has been reached (see step 105). If the voltage between the terminals of any of the secondary batteries 2a1 to 2a10 has not reached the discharge end voltage and the determination result in step 105 is No, the control unit 3 repeats the process in step 105. After that, when the voltage between the terminals of any of the secondary batteries 2a1 to 2a10 reaches the discharge end voltage and the determination result in step 105 is Yes, the control unit 3 controls the connection switching unit 5 to control all the secondary batteries. The connection between 2a1 and 2a10 and the load 9 is disconnected, and the process ends. Therefore, the power supply from the power storage device 1 to the load 9 is temporarily stopped, and the secondary batteries 2a1 to 2a10 housed in the power supply unit 2 are charged, or another new secondary battery is charged with the secondary batteries 2a1 to 2a10. Will be exchanged.

一方、電力測定部７によって測定される負荷９への供給電力量がｗ１〜ｗ２の範囲にあって、ステップ１０３の判断結果がＹｅｓである場合、制御部３は、負荷９の推定される定格消費電力量がＷn1で、使用すべき二次電池２a1〜２a10の数が５個であると判断する。そして、次に、接続切替部５を制御して、５個の二次電池２a6〜２a10を負荷９から切り離し、５個の二次電池２a1〜２a5を負荷９に接続する切替制御を行う（ステップ１０６参照）。この際、制御部３は、図３に示す電池管理テーブル中における使用状態をこの切替制御に応じた内容に書き換える。図３に示す電池管理テーブルはステップ１０６が実行された際のテーブル値を示しており、電池Ｎｏ．１〜Ｎｏ．５の使用状態が使用中、電池Ｎｏ．６〜Ｎｏ．１０が休止中になっている。 On the other hand, when the amount of power supplied to the load 9 measured by the power measuring unit 7 is in the range of w1 to w2 and the determination result in step 103 is Yes, the control unit 3 determines the estimated rating of the load 9. It is determined that the power consumption is Wn1 and the number of secondary batteries 2a1 to 2a10 to be used is five. Then, next, the connection switching unit 5 is controlled to perform switching control in which the five secondary batteries 2a6 to 2a10 are disconnected from the load 9 and the five secondary batteries 2a1 to 2a5 are connected to the load 9 (step). 106). At this time, the control unit 3 rewrites the usage state in the battery management table shown in FIG. 3 to the contents corresponding to this switching control. The battery management table shown in FIG. 3 shows the table values when step 106 is executed, and the battery No. 1-No. When the usage state of 5 is in use, the battery No. 6 to No. 10 is dormant.

次に、制御部３は、図３に示す電池管理テーブルを参照し、負荷９に接続されている５個の二次電池２a1〜２a5のなかのいずれかの端子間電圧が、放電終止電圧に達したか否かを判断する（ステップ１０７参照）。いずれの二次電池２a1〜２a5の端子間電圧も放電終止電圧に達しておらず、ステップ１０７の判断結果がＮｏである場合、制御部３はステップ１０７の処理を繰り返す。その後、いずれかの二次電池２a1〜２a5の端子間電圧が放電終止電圧に達し、ステップ１０７の判断結果がＹｅｓになると、制御部３は、次に、接続切替部５を制御して、５個の二次電池２a1〜２a5を負荷９から切り離し、他の５個の二次電池２a6〜２a10を負荷９に接続する切替制御を行う（ステップ１０８参照）。そして、制御部３は、図３に示す電池管理テーブル中における使用状態をこの切替制御に応じた内容に書き換え、電池Ｎｏ．１〜Ｎｏ．５の使用状態を休止中、電池Ｎｏ．６〜Ｎｏ．１０を使用中にする。 Next, the control unit 3 refers to the battery management table shown in FIG. 3, and the voltage between terminals of the five secondary batteries 2a1 to 2a5 connected to the load 9 becomes the discharge end voltage. It is determined whether or not it has been reached (see step 107). If the voltage between the terminals of any of the secondary batteries 2a1 to 2a5 has not reached the discharge end voltage and the determination result in step 107 is No, the control unit 3 repeats the process in step 107. After that, when the voltage between the terminals of any of the secondary batteries 2a1 to 2a5 reaches the discharge end voltage and the determination result in step 107 is Yes, the control unit 3 then controls the connection switching unit 5 to 5 Switching control is performed by disconnecting the two secondary batteries 2a1 to 2a5 from the load 9 and connecting the other five secondary batteries 2a6 to 2a10 to the load 9 (see step 108). Then, the control unit 3 rewrites the usage state in the battery management table shown in FIG. 3 to the contents corresponding to this switching control, and the battery No. 1-No. While the usage state of No. 5 is suspended, the battery No. 6 to No. Make 10 in use.

次に、制御部３は、図３に示す電池管理テーブルを参照し、負荷９に接続されている５個の二次電池２a6〜２a10のなかのいずれかの端子間電圧が、放電終止電圧に達したか否かを判断する（ステップ１０９参照）。いずれの二次電池２a6〜２a10の端子間電圧も放電終止電圧に達しておらず、ステップ１０９の判断結果がＮｏである場合、制御部３はステップ１０９の処理を繰り返す。その後、いずれかの二次電池２a6〜２a10の端子間電圧が放電終止電圧に達し、ステップ１０９の判断結果がＹｅｓになると、制御部３は、次に、他の５個の二次電池２a1〜２a5が充電済みであるか否か、または、他の５個の二次電池２a1〜２a5が交換済みの新たなものであるか否か、電池管理テーブルのＳＯＣ等を参照することで、判断する（ステップ１１０参照）。 Next, the control unit 3 refers to the battery management table shown in FIG. 3, and the voltage between terminals of the five secondary batteries 2a6 to 2a10 connected to the load 9 becomes the discharge end voltage. Determine if it has been reached (see step 109). If the voltage between the terminals of any of the secondary batteries 2a6 to 2a10 has not reached the discharge end voltage and the determination result in step 109 is No, the control unit 3 repeats the process in step 109. After that, when the voltage between the terminals of any of the secondary batteries 2a6 to 2a10 reaches the discharge end voltage and the determination result in step 109 is Yes, the control unit 3 then sends the other five secondary batteries 2a1 to. Whether or not 2a5 is charged, or whether or not the other five secondary batteries 2a1 to 2a5 are new ones that have been replaced, is determined by referring to the SOC of the battery management table. (See step 110).

他の５個の二次電池２a1〜２a5が充電済み、または、交換済みの新たなものであり、ステップ１１０の判断結果がＹｅｓである場合、制御部３は、次に、ステップ１０８の処理へ移行し、接続切替部５を制御して、５個の二次電池２a6〜２a10を負荷９から切り離し、他の５個の二次電池２a1〜２a5を負荷９に接続する切替制御を行う。その後、ステップ１０８〜ステップ１１０の処理を繰り返す。 If the other five secondary batteries 2a1 to 2a5 are new ones that have been charged or replaced and the determination result in step 110 is Yes, the control unit 3 then proceeds to the process of step 108. After the transition, the connection switching unit 5 is controlled to perform switching control in which the five secondary batteries 2a6 to 2a10 are disconnected from the load 9 and the other five secondary batteries 2a1 to 2a5 are connected to the load 9. After that, the processes of steps 108 to 110 are repeated.

その後、他の５個の二次電池２a6〜２a10または２a1〜２a5が充電済みでなく、かつ、交換済みの新たなものでなく、ステップ１１０の判断結果がＮｏになると、制御部３は、接続切替部５を制御して全ての二次電池２a1〜２a10と負荷９との間の接続を切り離し、処理を終了する。したがって、蓄電装置１から負荷９への電源供給が一旦停止され、給電部２に収容される二次電池２a1〜２a10が充電されるか、別の新たな二次電池に二次電池２a1〜２a10が交換されることになる。 After that, when the other five secondary batteries 2a6 to 2a10 or 2a1 to 2a5 are not charged and are not new ones that have been replaced, and the determination result in step 110 is No, the control unit 3 is connected. The switching unit 5 is controlled to disconnect the connections between all the secondary batteries 2a1 to 2a10 and the load 9, and the process ends. Therefore, the power supply from the power storage device 1 to the load 9 is temporarily stopped, and the secondary batteries 2a1 to 2a10 housed in the power supply unit 2 are charged, or another new secondary battery is charged with the secondary batteries 2a1 to 2a10. Will be exchanged.

このような本実施形態による蓄電装置１によれば、給電部２において並列接続される二次電池２a1〜２a10の数は、図４、ステップ１０６で、制御部３の接続切替部５に対する制御により、電力測定部７で測定される電力量が属する範囲に対応して記憶部４の電池数決定テーブル（図２参照）に記憶される二次電池２a1〜２a10の数に切り替えられる。したがって、給電部２において並列接続される二次電池２a1〜２a10の数は、負荷９が消費する電力量に応じた適切な数に設定される。このため、負荷９の種類によっては、給電部２における全ての二次電池２a1〜２a10を使用しなくても負荷９を稼働させることが出来、その際未使用の二次電池２a6〜２a10または２a1〜２a5を待機させることができ、その結果、二次電池２a1〜２a10の好ましい運用が可能となる。 According to the power storage device 1 according to the present embodiment, the number of secondary batteries 2a1 to 2a10 connected in parallel in the power feeding unit 2 is controlled by the connection switching unit 5 of the control unit 3 in step 106 of FIG. , The number of secondary batteries 2a1 to 2a10 stored in the battery number determination table (see FIG. 2) of the storage unit 4 is switched according to the range to which the electric power measured by the power measurement unit 7 belongs. Therefore, the number of the secondary batteries 2a1 to 2a10 connected in parallel in the power feeding unit 2 is set to an appropriate number according to the amount of power consumed by the load 9. Therefore, depending on the type of the load 9, the load 9 can be operated without using all the secondary batteries 2a1 to 2a10 in the power feeding unit 2, and at that time, the unused secondary batteries 2a6 to 2a10 or 2a1 can be operated. ~ 2a5 can be put on standby, and as a result, preferable operation of the secondary batteries 2a1 to 2a10 becomes possible.

また、本実施形態による蓄電装置１では、各二次電池２a1〜２a10の端子間電圧を測定するＢＭＵ２b1〜２b10を備え、制御部３は、上記のように、図４、ステップ１０７またはステップ１０９で、接続切替部５によって負荷９に接続されている二次電池２a1〜２a5のいずれか、または二次電池２a6〜２a10のいずれかについて測定される端子間電圧が放電終止電圧に達すると、負荷９に接続されていなかった所定の二次電池２a6〜２a10または２a1〜２a5を負荷９に接続する切り替え制御を接続切替部５に対して行う。 Further, the power storage device 1 according to the present embodiment includes BMUs 2b1 to 2b10 for measuring the voltage between the terminals of the secondary batteries 2a1 to 2a10, and the control unit 3 is described in FIG. 4, step 107 or step 109 as described above. When the voltage between terminals measured for any of the secondary batteries 2a1 to 2a5 or any of the secondary batteries 2a6 to 2a10 connected to the load 9 by the connection switching unit 5 reaches the discharge end voltage, the load 9 Switching control for connecting the predetermined secondary batteries 2a6 to 2a10 or 2a1 to 2a5 that were not connected to the load 9 to the load 9 is performed on the connection switching unit 5.

収容する全ての二次電池から負荷に電力が供給される従来の蓄電装置では、いずれかの二次電池の端子間電圧が放電終止電圧に達すると、蓄電装置から負荷への電力供給を一旦停止し、蓄電装置が収容する二次電池を充電したり、充電された別の新たな二次電池に交換する必要があった。このため、その間、負荷の稼働が余儀なく停止されていた。しかし、本実施形態による蓄電装置１によれば、負荷９に接続されている二次電池２a1〜２a5のいずれか、または二次電池２a6〜２a10のいずれかの端子間電圧が放電終止電圧に達したことが、ＢＭＵ２b1〜２b5またはＢＭＵ２b6〜２b10の測定によって判明すると、制御部３の接続切替部５に対する切り替え制御により、負荷９に接続されていなかった所定の二次電池２a6〜２a10または２a1〜２a5が負荷９に接続される。 In the conventional power storage device in which power is supplied to the load from all the accommodating secondary batteries, when the voltage between the terminals of any of the secondary batteries reaches the discharge end voltage, the power supply from the power storage device to the load is temporarily stopped. However, it was necessary to charge the secondary battery contained in the power storage device or replace it with another charged secondary battery. Therefore, during that time, the operation of the load was unavoidably stopped. However, according to the power storage device 1 according to the present embodiment, the voltage between the terminals of any of the secondary batteries 2a1 to 2a5 or the secondary batteries 2a6 to 2a10 connected to the load 9 reaches the discharge end voltage. When it was found by the measurement of BMU2b1 to 2b5 or BMU2b6 to 2b10, it was found that the predetermined secondary battery 2a6 to 2a10 or 2a1 to 2a5 that was not connected to the load 9 was controlled by the switching control of the control unit 3 to the connection switching unit 5. Is connected to the load 9.

したがって、負荷９へは、負荷９に接続されていなかった所定の二次電池２a6〜２a10または２a1〜２a5から電力が供給し続けられ、従来の蓄電装置のように負荷９への電力供給を一旦停止する必要はない。このため、負荷９に対して安定して電力を供給することが可能となり、蓄電装置１に収容される二次電池２a1〜２a10の好ましい運用を持続して行うことができる。 Therefore, power is continuously supplied to the load 9 from the predetermined secondary batteries 2a6 to 2a10 or 2a1 to 2a5 that are not connected to the load 9, and the power is once supplied to the load 9 as in the conventional power storage device. There is no need to stop. Therefore, it is possible to stably supply electric power to the load 9, and it is possible to continuously perform preferable operations of the secondary batteries 2a1 to 2a10 housed in the power storage device 1.

また、本実施形態による蓄電装置１は、制御部３が、上記のように、給電部２から負荷９へ電力が供給され始めた直後の図４、ステップ１０６において、電力測定部７によって測定される電力量に対応する数の二次電池２a1〜２a10を負荷９に接続する切替制御を接続切替部５に対して行う。したがって、本実施形態による蓄電装置１によれば、給電部２における二次電池２a1〜２a10の並列接続数は、給電部２から負荷９へ電力が供給され始めた直後に、負荷９の消費電力に応じた数に制御部３によって切り替えられる。このため、給電部２から負荷９へ電力が供給され始めて時間が経ってから、二次電池２a1〜２a10の並列接続数が適切な数に切り替えられる場合に比較して、二次電池２a1〜２a10の好ましい運用に資することになる。 Further, the power storage device 1 according to the present embodiment is measured by the power measurement unit 7 in FIG. 4 and step 106 immediately after the control unit 3 starts supplying power from the power supply unit 2 to the load 9 as described above. Switching control for connecting the number of secondary batteries 2a1 to 2a10 corresponding to the amount of electric power to the load 9 is performed on the connection switching unit 5. Therefore, according to the power storage device 1 according to the present embodiment, the number of parallel connections of the secondary batteries 2a1 to 2a10 in the power supply unit 2 is the power consumption of the load 9 immediately after the power supply unit 2 starts supplying power to the load 9. The number is switched by the control unit 3 according to the number. Therefore, the secondary batteries 2a1 to 2a10 are compared with the case where the number of parallel connections of the secondary batteries 2a1 to 2a10 is switched to an appropriate number after a lapse of time after the power supply unit 2 starts supplying power to the load 9. Will contribute to the favorable operation of.

また、本実施形態による蓄電装置１では、給電部２が、負荷９の稼働時にいずれかの二次電池２a1〜２a10が負荷９に接続されて、負荷９の稼働時に負荷９へ電力が常時供給される。したがって、本実施形態による蓄電装置１によれば、負荷９の設置が困難であった場所でも負荷９に電力を供給でき、しかも、収容する二次電池２a1〜２a10の好ましい運用を行える蓄電装置１が提供される。 Further, in the power storage device 1 according to the present embodiment, the power supply unit 2 is connected to any of the secondary batteries 2a1 to 2a10 when the load 9 is operating, and power is constantly supplied to the load 9 when the load 9 is operating. Will be done. Therefore, according to the power storage device 1 according to the present embodiment, the power storage device 1 can supply power to the load 9 even in a place where it is difficult to install the load 9, and can perform preferable operation of the secondary batteries 2a1 to 2a10 to be accommodated. Is provided.

また、本実施形態による蓄電装置１は、工事による停電や計画停電等の際に、商用電源からの電力の供給を受けることを前提とする負荷９に対して電力を供給する場合にも使用することができ、工事が開始されてから終了するまでの期間にわたり、負荷９に対して電力を供給し続けることができる。このため、本実施形態による蓄電装置１は、工事による停電や計画停電等の際における、蓄電装置１に収容される二次電池２a1〜２a10の運用においても、上記と同様な作用効果が発揮され、二次電池２a1〜２a10の好ましい運用を行うことができる。 The power storage device 1 according to the present embodiment is also used when supplying power to a load 9 which is premised on receiving power from a commercial power source in the event of a power outage due to construction work, a planned power outage, or the like. It is possible to continue to supply electric power to the load 9 from the start to the end of the construction. Therefore, the power storage device 1 according to the present embodiment exhibits the same effects as described above even in the operation of the secondary batteries 2a1 to 2a10 housed in the power storage device 1 in the event of a power failure due to construction work or a planned power failure. , The secondary batteries 2a1 to 2a10 can be preferably operated.

なお、上記の実施形態では、二次電池２a1〜２a10の並列接続数が、給電部２から負荷９へ電力が供給され始めた直後に、負荷９の消費電力に応じた数に切り替えられる場合について説明したが、本発明はこれに限定されるものではない。すなわち、二次電池２a1〜２a10と負荷９とが接続されているときにはいつでも、負荷９の消費電力量が測定されて、測定された負荷９の消費電力量に応じた数の二次電池２a1〜２a10が並列接続されるように構成してもよい。 In the above embodiment, the number of parallel connections of the secondary batteries 2a1 to 2a10 is switched to a number corresponding to the power consumption of the load 9 immediately after the power supply unit 2 starts supplying power to the load 9. As described above, the present invention is not limited to this. That is, whenever the secondary batteries 2a1 to 2a10 and the load 9 are connected, the power consumption of the load 9 is measured, and the number of the secondary batteries 2a1 to the number corresponding to the measured power consumption of the load 9 is measured. 2a10 may be configured to be connected in parallel.

また、上記の実施形態では、制御部３は、図４、ステップ１０６において、１０個の二次電池２a1〜２a10から５個を選ぶときに、電池管理テーブルに記憶されている電池Ｎｏ．のうちの若い５個の番号を持つ二次電池２a1〜２a5を選択したが、本発明はこれに限定されるものではない。例えば、制御部３は、予め定義された所定のルール、例えば、偶数または奇数の電池Ｎｏ．を持つものを選択するルールなどに従って、１０個の二次電池２a1〜２a10から５個を選ぶように構成してもよい。 Further, in the above embodiment, when the control unit 3 selects 5 of the 10 secondary batteries 2a1 to 2a10 in FIG. 4, step 106, the battery No. stored in the battery management table. The secondary batteries 2a1 to 2a5 having five younger numbers were selected, but the present invention is not limited thereto. For example, the control unit 3 has a predetermined rule defined in advance, for example, an even-numbered or odd-numbered battery No. 5 of 10 secondary batteries 2a1 to 2a10 may be selected according to a rule for selecting a battery having a battery.

また、上記の実施形態では、図３に示す電池管理テーブルにおいて、各二次電池２a1〜２a10に電池Ｎｏ．を付与して、各二次電池２a1〜２a10を電池Ｎｏ．で識別・管理する場合について説明したが、本発明はこれに限定されるものではない。例えば、各二次電池２a1〜２a10にその製造番号といった固有の番号を付与して、固有の番号で各二次電池２a1〜２a10を識別・管理するように構成してもよい。 Further, in the above embodiment, in the battery management table shown in FIG. 3, each secondary battery 2a1 to 2a10 has a battery No. , And each secondary battery 2a1 to 2a10 is assigned to the battery No. Although the case of identification and management has been described in the above, the present invention is not limited to this. For example, each secondary battery 2a1 to 2a10 may be given a unique number such as its serial number, and the secondary batteries 2a1 to 2a10 may be identified and managed by the unique number.

この場合、図４、ステップ１１０において、他の５個の二次電池２a1〜２a5が充電済みであるか否か、または、他の５個の二次電池２a1〜２a5が交換済みの新たなものであるか否かを、固有の番号によって識別することができる。すなわち、他の５個の二次電池２a1〜２a5の固有番号が電池管理テーブルに登録されていない固有番号である場合には、交換済みの新たなものであると識別することができる。 In this case, in FIG. 4, step 110, whether or not the other five secondary batteries 2a1 to 2a5 have been charged, or whether the other five secondary batteries 2a1 to 2a5 have been replaced with new ones. Whether or not it is, can be identified by a unique number. That is, when the unique numbers of the other five secondary batteries 2a1 to 2a5 are unique numbers that are not registered in the battery management table, it can be identified as a new one that has been replaced.

また、上記の実施形態において、蓄電装置１は、制御部３の制御に応じて、電池管理テーブルのうちの一部の内容、たとえば、使用状態などを図示しない表示部に表示するように構成してもよい。この場合、制御部３は、図４、ステップ１０４，１０６およびステップ１０８で二次電池２a1〜２a10と負荷９との間の接続が確立したとき、現在負荷９に接続されて負荷９に給電している、使用状態が使用中の二次電池２a1〜２a10を表示部８に表示させる。 Further, in the above embodiment, the power storage device 1 is configured to display a part of the contents of the battery management table, for example, a usage state, on a display unit (not shown) according to the control of the control unit 3. You may. In this case, when the connection between the secondary batteries 2a1 to 2a10 and the load 9 is established in FIGS. 4, steps 104 and 106 and step 108, the control unit 3 is currently connected to the load 9 and supplies power to the load 9. The display unit 8 displays the secondary batteries 2a1 to 2a10 that are in use and are in use.

また、上記の実施形態において、蓄電装置１は、いずれかの二次電池２a1〜２a10に放電終止電圧を検出した図４、ステップ１０５において、また、５個の二次電池２a6〜２a10または２a1〜２a5について充電済みおよび交換済みが検出されないステップ１１０において、図示しない無線／有線通信部を制御部３によって制御して、負荷９への電力供給が停止した旨を遠隔地の管理センタ等に通知するように構成してもよい。 Further, in the above embodiment, in FIG. 4, step 105, in which the power storage device 1 detects the discharge termination voltage in any of the secondary batteries 2a1 to 2a10, the five secondary batteries 2a6 to 2a10 or 2a1 to 2a1 to In step 110 in which charging and replacement of 2a5 are not detected, the wireless / wired communication unit (not shown) is controlled by the control unit 3 to notify a remote management center or the like that the power supply to the load 9 has stopped. It may be configured as follows.

また、上記の実施形態においては、図２に示す電池数決定テーブルが、電力測定部７によって測定される電力量の各範囲に対応して、負荷９の推定される定格消費電力量および二次電池の使用すべき数を記憶し、制御部３が、電力測定部７の測定結果に基づいて負荷９の定格消費電力量を推定し、推定される定格消費電力量に応じて二次電池の数を決定していた。特に、ＤＣ／ＡＣ変換部６から負荷９に供給されている電力量を電力測定部７によって測定することで負荷９の定格消費電力量を推定していた。本発明はこれに限定されるものではない。例えば、電池数決定テーブルが、電力測定部７によって測定される電力量の各範囲に対応して二次電池の使用すべき数だけを記憶し、電力測定部７の測定結果に基づいて、負荷９の定格消費電力量を推定することなく、使用すべき二次電池の数を決定するように構成してもよい。 Further, in the above embodiment, the battery number determination table shown in FIG. 2 corresponds to each range of the electric energy measured by the electric energy measuring unit 7, and the estimated rated electric energy of the load 9 and the secondary. The control unit 3 stores the number of batteries to be used, estimates the rated power consumption of the load 9 based on the measurement result of the power measurement unit 7, and determines the rated power consumption of the secondary battery according to the estimated rated power consumption. The number was decided. In particular, the rated power consumption of the load 9 was estimated by measuring the amount of power supplied from the DC / AC conversion unit 6 to the load 9 by the power measuring unit 7. The present invention is not limited to this. For example, the battery number determination table stores only the number of secondary batteries to be used corresponding to each range of the electric energy measured by the power measuring unit 7, and the load is based on the measurement result of the power measuring unit 7. It may be configured to determine the number of secondary batteries to be used without estimating the rated power consumption of 9.

また、上記の実施の形態では、１０個の二次電池モジュール２１〜２１０を個々に蓄電装置１の筐体に収容する構成としていた。本発明はこれに限定されず、例えば１０個の二次電池モジュール２１〜２１０が１つの筐体として構成され、この１つの筐体が専用のキャスタ付き台車上に搭載される構成としても良い。この場合、１０個の二次電池モジュール２１〜２１０からなる筐体を搭載した専用のキャスタ付き台車を蓄電装置１の筐体内に直接収容して負荷に給電する構成としても良い。これにより、二次電池モジュールの充電／交換に係る作業の負担を軽減することができる。 Further, in the above-described embodiment, the ten secondary battery modules 2 1 to 2 10 are individually housed in the housing of the power storage device 1. The present invention is not limited to this, and for example, ten secondary battery modules 2 1 to 2 10 are configured as one housing, and this one housing may be mounted on a dedicated caster-equipped carriage. good. In this case, a trolley with dedicated casters equipped with a housing composed of 10 secondary battery modules 2 1 to 2 10 may be directly housed in the housing of the power storage device 1 to supply power to the load. As a result, the burden of work related to charging / replacement of the secondary battery module can be reduced.

本発明による蓄電装置は、商用電源からの電力の供給を受けることを前提としない負荷に対して電力を供給する場合のみならず、工事による停電や計画停電等の際に、商用電源からの電力の供給を受けることを前提とする負荷に対して電力を供給する場合にも、利用することができる。 The power storage device according to the present invention not only supplies electric power to a load that is not premised on receiving electric power from a commercial power source, but also causes electric power from a commercial power source in the event of a power outage due to construction work or a planned power outage. It can also be used to supply power to a load that is supposed to be supplied with.

１…蓄電装置、２…給電部、２１〜２１０…二次電池モジュール、２a1〜２a10…二次電池、２b1〜２b10…ＢＭＵ（バッテリ・マネジメント・ユニット：電池電圧測定部）、２１〜２１０…二次電池モジュール、３…制御部、４…記憶部、５…接続切替部、６…ＤＣ／ＡＣ変換部、７…電力測定部、９…負荷 1 ... Power storage device, 2 ... Power supply unit, 2 1 to 2 10 ... Secondary battery module, 2a1 to 2a10 ... Secondary battery, 2b1 to 2b10 ... BMU (Battery management unit: Battery voltage measuring unit), 2 1 to 2 10 ... Secondary battery module, 3 ... Control unit, 4 ... Storage unit, 5 ... Connection switching unit, 6 ... DC / AC conversion unit, 7 ... Power measurement unit, 9 ... Load

Claims (4)

同一種類の複数の二次電池が並列に接続されて構成され、前記二次電池から負荷へ電力を供給する給電部と、
各前記二次電池と前記負荷との間の接続を切り替える接続切替部と、
前記給電部から前記負荷へ供給される電力量を測定する電力測定部と、
前記電力測定部によって測定される電力量の各範囲に対応して前記二次電池の使用すべき数を記憶する記憶部と、
前記接続切替部を制御して、前記給電部において並列接続される前記二次電池の数を、前記電力測定部で測定される電力量が属する前記範囲に対応して前記記憶部に記憶される前記二次電池の数に切り替える制御部と
を備える蓄電装置。 A power supply unit that is configured by connecting multiple secondary batteries of the same type in parallel and supplies power from the secondary batteries to the load.
A connection switching unit that switches the connection between each of the secondary batteries and the load,
A power measuring unit that measures the amount of power supplied from the power feeding unit to the load,
A storage unit that stores the number of secondary batteries to be used corresponding to each range of electric power measured by the power measurement unit, and a storage unit.
By controlling the connection switching unit, the number of the secondary batteries connected in parallel in the power feeding unit is stored in the storage unit corresponding to the range to which the electric energy measured by the power measuring unit belongs. A power storage device including a control unit that switches to the number of secondary batteries. 各前記二次電池の端子間電圧を測定する電池電圧測定部を備え、
前記制御部は、前記接続切替部によって前記負荷に接続されている前記二次電池のいずれかについて前記電池電圧測定部によって測定される電圧が放電終止電圧に達すると、前記負荷に接続されていなかった所定の前記二次電池を前記負荷に接続する切り替え制御を前記接続切替部に対して行う
ことを特徴とする請求項１に記載の蓄電装置。 A battery voltage measuring unit for measuring the voltage between terminals of each of the secondary batteries is provided.
The control unit is not connected to the load when the voltage measured by the battery voltage measuring unit for any of the secondary batteries connected to the load by the connection switching unit reaches the discharge end voltage. The power storage device according to claim 1, wherein switching control for connecting the predetermined secondary battery to the load is performed on the connection switching unit. 前記制御部は、前記給電部から前記負荷へ電力が供給され始めた直後に前記電力測定部によって測定される電力量に対応する数の前記二次電池を前記負荷に接続する切替制御を、前記給電部から前記負荷へ電力が供給され始めた直後に前記接続切替部に対して行う
ことを特徴とする請求項１または請求項２に記載の蓄電装置。 The control unit controls switching to connect the secondary batteries in a number corresponding to the amount of electric power measured by the electric power measuring unit to the load immediately after the electric power supply unit starts to supply electric power to the load. The power storage device according to claim 1 or 2, wherein power is supplied to the connection switching unit immediately after the power supply unit starts to supply electric power to the load. 前記給電部は、前記負荷の稼働時にいずれかの前記二次電池が前記負荷に接続されて前記負荷の稼働時に前記負荷へ電力を常時供給することを特徴とする請求項１から請求項３のいずれか１項に記載の蓄電装置。 The power supply unit according to any one of claims 1 to 3, wherein any of the secondary batteries is connected to the load when the load is operating, and power is constantly supplied to the load when the load is operating. The power storage device according to any one item.
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JP2011055636A (en) * 2009-09-01 2011-03-17 Ntt Facilities Inc Dc power supply apparatus and method for controlling the same
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JPH0265050U (en) * 1988-11-02 1990-05-16
JPH09298805A (en) * 1996-04-30 1997-11-18 Yamaha Motor Co Ltd Power supply method for electric motor car and its equipment
JP2013501488A (en) * 2009-07-29 2013-01-10 ザ・リージェンツ・オブ・ザ・ユニバーシティ・オブ・ミシガン Battery charging and discharging scheduling system
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