JP2015012787A - Storage battery system - Google Patents

Storage battery system Download PDF

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JP2015012787A
JP2015012787A JP2013139125A JP2013139125A JP2015012787A JP 2015012787 A JP2015012787 A JP 2015012787A JP 2013139125 A JP2013139125 A JP 2013139125A JP 2013139125 A JP2013139125 A JP 2013139125A JP 2015012787 A JP2015012787 A JP 2015012787A
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storage battery
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charging device
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JP6132240B2 (en
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小林　美佐世
Misayo Kobayashi
美佐世 小林
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Panasonic Intellectual Property Management Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a storage battery system whose function does not stop even when a part of storage batteries is removed.SOLUTION: When a storage battery (for example, 10C) is removed from any series circuit (for example, 1A), a control device 4 opens a switch (for example, 5A) to cut off the connection between an output terminal of a charger 2 and the series circuit 1A from which the storage battery 10C is removed. Therefore, the series circuit 1A including the removed storage battery 10C is separated from the charger 2 (and a power converter 3), which makes it possible to charge/discharge storage batteries 10E to 10P of the remaining series circuits 1B to 1D. Thereby, a storage battery system can be provided whose function does not stop even when a part of the storage batteries, the storage battery 10C, is removed.

Description

本発明は、複数の蓄電池で構成される蓄電池システムに関する。   The present invention relates to a storage battery system including a plurality of storage batteries.

従来例として、特許文献１に記載されている電力供給システムを例示する。特許文献１記載の従来例は、太陽電池が発電する電力を負荷機器に供給するとともに余剰電力で蓄電池を充電している。そして、太陽電池の発電量が低下したときに、蓄電池に充電されている電力を負荷機器に供給するように構成されている。   As a conventional example, a power supply system described in Patent Document 1 is illustrated. The conventional example described in Patent Document 1 supplies power generated by a solar battery to a load device and charges a storage battery with surplus power. And when the electric power generation amount of a solar cell falls, it is comprised so that the electric power charged by the storage battery may be supplied to a load apparatus.

また、近年、電気自動車やプラグインハイブリッド自動車に搭載されている蓄電池システム(蓄電池、充電装置、制御装置などで構成されるシステム)から宅内の負荷機器に給電する、いわゆるＶ２Ｈ(Vehicle to Home)が実用化されている。   In recent years, so-called V2H (Vehicle to Home), which supplies power to the load equipment in the house from a storage battery system (system consisting of a storage battery, a charging device, a control device, etc.) mounted on an electric vehicle or a plug-in hybrid vehicle. It has been put into practical use.

特開２０１２−２４９４７６号公報JP 2012-249476 A

ところで、上述のような蓄電池システムにおける蓄電池を複数の可搬型の蓄電池の直並列回路として構成し、必要に応じて前記直並列回路から蓄電池を取り外し、取り外した蓄電池から負荷に給電することが考えられる。この場合、一部の蓄電池が取り外されることで蓄電池システム全体が機能を停止してしまうことは好ましくない。   By the way, it is conceivable that the storage battery in the storage battery system as described above is configured as a series-parallel circuit of a plurality of portable storage batteries, and the storage battery is removed from the series-parallel circuit as necessary, and power is supplied from the removed storage battery to the load. . In this case, it is not preferable that the entire storage battery system stops functioning by removing some of the storage batteries.

本発明は、上記課題に鑑みて為されたものであり、一部の蓄電池が取り外されても機能停止することのない蓄電池システムの提供を目的とする。   This invention is made | formed in view of the said subject, and it aims at provision of the storage battery system which does not stop a function even if one part of storage battery is removed.

本発明の蓄電池システムは、可搬型の複数の蓄電池が直列に接続された複数の直列回路と、充電電流を出力する出力端間に複数の前記直列回路が並列接続される充電装置と、前記蓄電池から放電される直流電力を電力変換する電力変換装置と、前記充電装置の出力端及び前記電力変換装置の入力端と少なくとも何れか１つの前記直列回路との間の電路を開閉する１乃至複数の開閉器と、前記開閉器を制御して前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオン・オフする制御装置とを備え、前記制御装置は、何れかの前記直列回路から前記蓄電池が取り外された場合、前記開閉器を開成することで前記蓄電池が取り外された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオフし、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることを特徴とする。   The storage battery system of the present invention includes a plurality of series circuits in which a plurality of portable storage batteries are connected in series, a charging device in which a plurality of the series circuits are connected in parallel between output terminals that output a charging current, and the storage battery. 1 to a plurality of power converters that convert DC power discharged from the power converter, and an electric circuit between the output terminal of the charging device and the input terminal of the power converter and at least one of the series circuits. A switch, and a control device that controls the switch to turn on / off the connection between the series circuit and the output terminal of the charging device and the input terminal of the power converter, and the control device is either When the storage battery is removed from the series circuit, the connection between the series circuit from which the storage battery has been removed and the output terminal of the charging device and the input terminal of the power converter is turned off by opening the switch. When the removed storage battery is reconnected to the series circuit, the series circuit to which the storage battery is reconnected by closing the switch, the output terminal of the charging device, and the input of the power conversion device The connection with the end is turned on.

この蓄電池システムにおいて、前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うとき、前記蓄電池が再接続された前記直列回路を除く他の前記直列回路と前記充電装置の出力端との接続をオフするように前記開閉器を制御し、且つ前記再接続された蓄電池と並列に接続されている前記スイッチを開くとともに前記再接続された蓄電池に直列接続されている他の複数の前記蓄電池と並列接続されている前記スイッチを閉じ、前記再接続された蓄電池が他の前記蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることが好ましい。   In this storage battery system, the series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series, and the control device reconnects the removed storage battery to the series circuit. The switch is turned on to turn on the connection between the series circuit to which the storage battery is reconnected and the output terminal of the charging device and the input terminal of the power converter, and the charging device is charged. The switch is controlled to turn off the connection between the other series circuit except the series circuit to which the storage battery is reconnected and the output terminal of the charging device, and the reconnected storage battery is Open the switch connected in parallel with the battery and close the switch connected in parallel with the plurality of other storage batteries connected in series to the reconnected storage battery. After the charged storage battery is charged to a voltage equal to the voltage of the other storage battery, the switch is opened and the switch is closed to all the series circuits, the output terminals of the charging device, and the power conversion device. It is preferable to turn on the connection with the input terminal.

この蓄電池システムにおいて、複数の前記直列回路のうちの少なくとも何れか１つの直列回路は、前記充電装置の出力端及び前記電力変換装置の入力端との間に前記開閉器が接続されないことが好ましい。   In this storage battery system, it is preferable that the switch is not connected between the output terminal of the charging device and the input terminal of the power converter in at least one of the plurality of series circuits.

この蓄電池システムにおいて、前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うとき、前記蓄電池が再接続された前記直列回路を除く他の前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオフするように前記開閉器を制御し、且つ前記再接続された蓄電池の電圧が、当該蓄電池と直列接続されている他の前記蓄電池の電圧よりも高ければ、前記再接続された蓄電池と並列に接続されている前記スイッチを閉じるとともに前記再接続された蓄電池に直列接続されている他の複数の前記蓄電池と並列接続されている前記スイッチを開き、前記他の蓄電池が前記再接続された蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることが好ましい。   In this storage battery system, the series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series, and the control device reconnects the removed storage battery to the series circuit. The switch is turned on to turn on the connection between the series circuit to which the storage battery is reconnected and the output terminal of the charging device and the input terminal of the power converter, and the charging device is charged. The switch is controlled to turn off the connection between the other series circuit except the series circuit to which the storage battery is reconnected, and the output terminal of the charging device and the input terminal of the power converter. And the switch connected in parallel with the reconnected storage battery if the voltage of the reconnected storage battery is higher than the voltage of the other storage battery connected in series with the storage battery. Close and open the switch connected in parallel with a plurality of other storage batteries connected in series with the reconnected storage battery, and the other storage battery is charged to a voltage equal to the voltage of the reconnected storage battery. After that, it is preferable to open the switch and close the switch to turn on the connection between all the series circuits and the output terminal of the charging device and the input terminal of the power converter.

この蓄電池システムにおいて、前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うことができないとき、前記再接続された蓄電池と並列に接続されている前記スイッチを開くとともに、前記再接続され蓄電池を除く他の蓄電池から放電される電荷で前記再接続された蓄電池を充電するように前記スイッチ及び前記開閉器を制御し、前記再接続された蓄電池が他の前記蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることが好ましい。   In this storage battery system, the series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series, and the control device reconnects the removed storage battery to the series circuit. The switch is turned on to turn on the connection between the series circuit to which the storage battery is reconnected and the output terminal of the charging device and the input terminal of the power converter, and the charging device is charged. Open the switch connected in parallel with the reconnected storage battery, and charge the reconnected storage battery with a charge discharged from another storage battery excluding the storage battery. Controlling the switch and the switch to open the switch after the reconnected storage battery is charged to a voltage equal to the voltage of the other storage battery It is preferable to turn on the connection between the input end of the output terminal and the power conversion apparatus also all of the series circuit by closing the switch in said charging device.

この蓄電池システムにおいて、前記直列回路に含まれる複数の前記蓄電池のうちで残量が最も多い前記蓄電池を通知する通知手段を備えることが好ましい。   In this storage battery system, it is preferable that the storage battery system includes notification means for notifying the storage battery having the largest remaining amount among the plurality of storage batteries included in the series circuit.

この蓄電池システムにおいて、前記通知手段は、残量が最も少ない前記蓄電池が複数存在する場合、取り外された回数が最も少ない前記蓄電池を通知することが好ましい。   In this storage battery system, it is preferable that the notification means notifies the storage battery having the smallest number of removals when there are a plurality of the storage batteries having the smallest remaining amount.

本発明の蓄電池システムは、制御装置が、何れかの直列回路から蓄電池が取り外された場合、開閉器を開成することで蓄電池が取り外された直列回路と充電装置の出力端及び電力変換装置の入力端との接続をオフするので、一部の蓄電池が取り外されても機能停止することのない蓄電池システムが提供できるという効果がある。   In the storage battery system of the present invention, when the storage battery is removed from any of the series circuits, the control apparatus opens the switch to open the switch, and the output terminal of the charging device and the input of the power conversion device. Since the connection with the end is turned off, there is an effect that it is possible to provide a storage battery system that does not stop functioning even if some of the storage batteries are removed.

本発明に係る蓄電池システムの実施形態を示し、１台の蓄電池が取り外された状態のシステム構成図である。1 is a system configuration diagram showing an embodiment of a storage battery system according to the present invention in a state where one storage battery is removed. FIG. 同上を示し、全ての蓄電池が接続された状態のシステム構成図である。It is a system configuration | structure figure in the state which showed the same and all the storage batteries were connected. 同上を示し、蓄電池が再接続された後の充電状態のシステム構成図である。It is a system block diagram of the charge state after showing the same and the storage battery being reconnected. 同上の動作説明用のフローチャートである。It is a flowchart for operation | movement description same as the above. 同上を示し、蓄電池が再接続された後の充電状態のシステム構成図である。It is a system block diagram of the charge state after showing the same and the storage battery being reconnected.

本実施形態の蓄電池システムは、図２に示すように複数の直列回路１Ａ〜１Ｄと、充電装置２と、電力変換装置３と、複数の開閉器５Ａ〜５Ｄと、制御装置４とを備える。   As shown in FIG. 2, the storage battery system according to the present embodiment includes a plurality of series circuits 1A to 1D, a charging device 2, a power conversion device 3, a plurality of switches 5A to 5D, and a control device 4.

直列回路１Ａは、可搬型の４つの蓄電池10Ａ〜10Ｄが直列に接続されて構成される。また、直列回路１Ｂは、可搬型の４つの蓄電池10Ｅ〜10Ｈが直列に接続されて構成される。さらに、直列回路１Ｃは、可搬型の４つの蓄電池10Ｉ〜10Ｌが直列に接続されて構成される。さらにまた、直列回路１Ｄは、可搬型の４つの蓄電池10Ｍ〜10Ｐが直列に接続されて構成される。   The series circuit 1A is configured by connecting four portable storage batteries 10A to 10D in series. The series circuit 1B is configured by connecting four portable storage batteries 10E to 10H in series. Furthermore, the series circuit 1C is configured by connecting four portable storage batteries 10I to 10L in series. Furthermore, the series circuit 1D is configured by connecting four portable storage batteries 10M to 10P in series.

ここで、本実施形態における直列回路１Ａ〜１Ｄは、直列接続された複数の蓄電池10Ａ〜10Ｐと並列に接続される複数のスイッチ11Ａ〜11Ｐを有している。なお、これらのスイッチ11Ａ〜11Ｐは、電磁リレーで構成されることが好ましい。   Here, the series circuits 1A to 1D in the present embodiment include a plurality of switches 11A to 11P connected in parallel to the plurality of storage batteries 10A to 10P connected in series. In addition, it is preferable that these switches 11A-11P are comprised with an electromagnetic relay.

充電装置２は、太陽電池などの直流電源(図示せず)から供給される直流電圧・直流電流を所望の直流電圧・直流電流に変換し、変換後の直流電圧・直流電流を出力端から出力する。そして、充電装置２の出力端間には、それぞれ開閉器５Ａ〜５Ｄを介して直列回路１Ａ〜１Ｄが並列に接続される。ただし、充電装置２は、交流の電力系統から供給される交流電圧・交流電流を直流電圧・直流電流に変換するように構成されても構わない。   The charging device 2 converts a DC voltage / DC current supplied from a DC power source (not shown) such as a solar battery into a desired DC voltage / DC current, and outputs the converted DC voltage / DC current from the output terminal. To do. And between the output terminals of the charging device 2, the series circuits 1A to 1D are connected in parallel via the switches 5A to 5D, respectively. However, the charging device 2 may be configured to convert an AC voltage / AC current supplied from an AC power system into a DC voltage / DC current.

電力変換装置３は、蓄電池10Ａ〜10Ｐから放電される直流電力を交流電力に変換するＤＣ／ＡＣコンバータ(インバータ)で構成される。なお、電力変換装置３で電力変換された交流電力は、分電盤を経由して住宅内の負荷機器に供給される。なお、電力変換装置３の入力端は、開閉器５Ａ〜５Ｄを介して直列回路１Ａ〜１Ｄと並列に接続される。   The power converter 3 includes a DC / AC converter (inverter) that converts DC power discharged from the storage batteries 10A to 10P into AC power. In addition, the alternating current power converted by the power converter 3 is supplied to the load equipment in a house via a distribution board. In addition, the input end of the power converter device 3 is connected in parallel with the series circuits 1A to 1D via the switches 5A to 5D.

開閉器５Ａ〜５Ｄは電磁リレーからなり、充電装置２の一方の出力端及び電力変換装置３の一方の入力端と各直列回路１Ａ〜１Ｄの一端との間に挿入される。つまり、開閉器５Ａ〜５Ｄが開成(オフ)しているときは、直列回路１Ａ〜１Ｄと充電装置２及び電力変換装置３との接続がオフされ、開閉器５Ａ〜５Ｄが閉成(オン)しているときは、直列回路１Ａ〜１Ｄと充電装置２及び電力変換装置３との接続がオンされる。   The switches 5A to 5D are composed of electromagnetic relays, and are inserted between one output end of the charging device 2 and one input end of the power conversion device 3 and one end of each series circuit 1A to 1D. That is, when the switches 5A to 5D are opened (off), the connection between the series circuits 1A to 1D and the charging device 2 and the power converter 3 is turned off, and the switches 5A to 5D are closed (on). When connected, the connection between the series circuits 1A to 1D and the charging device 2 and the power conversion device 3 is turned on.

制御装置４は、マイクロコントローラを主構成要素とし、各開閉器５Ａ〜５Ｄを個別に開閉制御するとともに、各蓄電池10Ａ〜10Ｐに並列接続されているスイッチ11Ａ〜11Ｐを個別にオン・オフ制御する。   The control device 4 includes a microcontroller as a main component, and individually controls opening / closing of the switches 5A to 5D, and individually controls on / off of the switches 11A to 11P connected in parallel to the storage batteries 10A to 10P. .

ところで、本実施形態の蓄電池システムは、電気自動車に搭載される。そして、電気自動車の走行中に蓄電池10Ａ〜10Ｐから駆動用のモータに直流電力を給電し、電気自動車の駐車中に蓄電池10Ａ〜10Ｐから電力変換装置３を介して宅内に交流電力を給電し、又は充電装置２で蓄電池10Ａ〜10Ｐを充電する。   By the way, the storage battery system of this embodiment is mounted in an electric vehicle. Then, DC power is supplied from the storage batteries 10A to 10P to the driving motor while the electric vehicle is running, and AC power is supplied from the storage batteries 10A to 10P to the home via the power converter 3 while the electric vehicle is parked. Alternatively, the storage batteries 10 </ b> A to 10 </ b> P are charged by the charging device 2.

また、各蓄電池10Ａ〜10Ｐは、トランクルームの床下などに配置されており、図示しない取り外し機構によって、容易に取り外して持ち運ぶことができるように構成されている。さらに、取り外し機構には、各蓄電池10Ａ〜10Ｐが取り外されているか否かを個別に検出する検出手段が設けられている。このような検出手段は、例えば、蓄電池10Ａ〜10Ｐが取り外されているときにオフするマイクロスイッチなどで構成可能である。そして、検出手段による検出結果(例えば、取り外されているときはローレベル、取り外されていないときはハイレベルとなる２値信号)が制御装置４に入力される。なお、電気自動車から取り外された蓄電池10Ａ，…は、例えば、図示しない宅内用電源装置などで利用される。   Moreover, each storage battery 10A-10P is arrange | positioned under the floor of a trunk room, etc., and it is comprised so that it can remove and carry easily by the removal mechanism which is not shown in figure. Further, the removal mechanism is provided with detection means for individually detecting whether or not each of the storage batteries 10A to 10P has been removed. Such a detection means can be comprised by the microswitch etc. which turn off, for example, when the storage batteries 10A-10P are removed. Then, a detection result (for example, a binary signal that is at a low level when removed and at a high level when not removed) is input to the control device 4. The storage battery 10A removed from the electric vehicle is used, for example, in an in-house power supply device (not shown).

次に、本実施形態の動作について、直列回路１Ａに含まれる１台の蓄電池10Ｃが取り外される場合を例にして、図４のフローチャートを参照しながら詳細に説明する。   Next, the operation of this embodiment will be described in detail with reference to the flowchart of FIG. 4 by taking as an example the case where one storage battery 10C included in the series circuit 1A is removed.

制御装置４は、蓄電池10Ｃが取り外されたことを示す検出結果が入力されると(ステップS1)、図１に示すように取り外された蓄電池10Ｃを含む直列回路１Ａに接続されている開閉器５Ａをオフする(ステップS2)。開閉器５Ａがオフすれば、直列回路１Ａが充電装置２及び電力変換装置３から切り離される。つまり、取り外された蓄電池11Ｃを含む直列回路１Ａが充電装置２及び電力変換装置３から切り離されるので、その他の直列回路１Ｂ〜１Ｄを充電装置２及び電力変換装置３に接続したまま使用(給電又は充電)することができる。   When a detection result indicating that the storage battery 10C has been removed is input to the control device 4 (step S1), the switch 5A connected to the series circuit 1A including the removed storage battery 10C as shown in FIG. Is turned off (step S2). When the switch 5 </ b> A is turned off, the series circuit 1 </ b> A is disconnected from the charging device 2 and the power conversion device 3. That is, since the series circuit 1A including the removed storage battery 11C is disconnected from the charging device 2 and the power conversion device 3, the other series circuits 1B to 1D are used while being connected to the charging device 2 and the power conversion device 3 (power supply or Can be charged).

そして、制御装置４は、取り外された蓄電池10Ｃが再度接続されたことを示す検出結果が入力されると(ステップS3)、図２に示すように取り外された蓄電池10Ｃを含む直列回路１Ａに接続されている開閉器５Ａをオンする(ステップS4)。   When the detection result indicating that the removed storage battery 10C is connected again is input (step S3), the control device 4 is connected to the series circuit 1A including the removed storage battery 10C as shown in FIG. The opened switch 5A is turned on (step S4).

また、制御装置４は、蓄電池10Ｃの再接続後に充電装置２が充電を開始したら(ステップS5)、図３に示すように開閉器５Ｂ〜５Ｄをオフし、且つ直列回路１Ａのスイッチ11Ａ，11Ｂ，11Ｄをオンする(ステップS6)。ここで、蓄電池10Ｃの内部抵抗よりもスイッチ11Ａ，…のオン抵抗の方が遙かに小さい。故に、スイッチ11Ａ，…がオンした蓄電池10Ａ，…においては、正極と負極の間がスイッチ11Ａ，…によってバイパスされるため、充電装置２による充電が行われない。つまり、蓄電池10Ｃのみが充電装置２によって充電されることになる。   In addition, when the charging device 2 starts charging after reconnection of the storage battery 10C (step S5), the control device 4 turns off the switches 5B to 5D and switches 11A and 11B of the series circuit 1A as shown in FIG. , 11D are turned on (step S6). Here, the on-resistance of the switches 11A,... Is much smaller than the internal resistance of the storage battery 10C. Therefore, in the storage batteries 10A,... With the switches 11A,... Turned on, charging between the positive and negative electrodes is bypassed by the switches 11A,. That is, only the storage battery 10C is charged by the charging device 2.

制御装置４は、蓄電池10Ｃの電圧が、その他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐの電圧に等しくなるまで蓄電池10Ｃが充電されれば(ステップS7)、図２に示すように開閉器５Ｂ〜５Ｄをオンし、且つ直列回路１Ａのスイッチ11Ａ，11Ｂ，11Ｄをオフする(ステップS8)。故に、再接続された蓄電池10Ｃの電圧がその他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐの電圧に等しい電圧まで充電された後、全ての蓄電池10Ａ〜10Ｐが充電装置２によって充電される。   If the storage battery 10C is charged until the voltage of the storage battery 10C becomes equal to the voltages of the other storage batteries 10A, 10B, 10D to 10P (step S7), the control device 4 switches the switches 5B to 5D as shown in FIG. Is turned on, and the switches 11A, 11B, and 11D of the series circuit 1A are turned off (step S8). Therefore, after the voltage of the reconnected storage battery 10C is charged to a voltage equal to the voltage of the other storage batteries 10A, 10B, 10D to 10P, all the storage batteries 10A to 10P are charged by the charging device 2.

上述のように本実施形態の蓄電池システムは、可搬型の複数の蓄電池10Ａ〜10Ｐが直列に接続された複数の直列回路１Ａ〜１Ｄと、充電電流を出力する出力端間に複数の直列回路１Ａ〜１Ｄが並列接続される充電装置２とを備える。また、本実施形態の蓄電池システムは、蓄電池10Ａ〜10Ｐから放電される直流電力を電力変換する電力変換装置３と、充電装置２の出力端及び電力変換装置３の入力端と少なくとも何れか１つの直列回路１Ａ〜１Ｄとの間の電路を開閉する１乃至複数の開閉器５Ａ〜５Ｄとを備える。さらに、本実施形態の蓄電池システムは、開閉器５Ａ〜５Ｄを制御して直列回路１Ａ〜１Ｄと充電装置２の出力端及び電力変換装置３の入力端との接続をオン・オフする制御装置４を備える。そして、制御装置４は、何れかの直列回路(例えば、１Ａ)から蓄電池(例えば、10Ｃ)が取り外された場合、開閉器(例えば、５Ａ)を開成することで蓄電池10Ｃが取り外された直列回路１Ａと充電装置２の出力端及び電力変換装置３の入力端との接続をオフする。さらに、制御装置４は、取り外された蓄電池10Ｃが直列回路１Ａに再度接続された場合、開閉器５Ａを閉成することで蓄電池10Ｃが再接続された直列回路１Ａと充電装置２の出力端及び電力変換装置３の入力端との接続をオンする。   As described above, the storage battery system of the present embodiment includes a plurality of series circuits 1A to 1D in which a plurality of portable storage batteries 10A to 10P are connected in series, and a plurality of series circuits 1A between output terminals that output charging currents. To 1D are connected in parallel. In addition, the storage battery system of the present embodiment includes at least one of the power conversion device 3 that converts the DC power discharged from the storage batteries 10A to 10P, the output end of the charging device 2, and the input end of the power conversion device 3. 1 to a plurality of switches 5A to 5D for opening and closing an electric circuit between the series circuits 1A to 1D. Furthermore, the storage battery system according to the present embodiment controls the switches 5A to 5D to turn on / off the connection between the series circuits 1A to 1D and the output terminal of the charging device 2 and the input terminal of the power converter 3. Is provided. Then, when the storage battery (for example, 10C) is removed from any of the series circuits (for example, 1A), the control device 4 opens the switch (for example, 5A) so that the storage battery 10C is removed. The connection between 1A and the output terminal of the charging device 2 and the input terminal of the power converter 3 is turned off. Further, when the removed storage battery 10C is reconnected to the series circuit 1A, the control device 4 closes the switch 5A to close the output circuit of the series circuit 1A to which the storage battery 10C is reconnected and the charging device 2. The connection with the input terminal of the power converter 3 is turned on.

本実施形態によれば、取り外された蓄電池10Ｃを含む直列回路１Ａが充電装置２及び電力変換装置３から切り離され、残った直列回路１Ｂ〜１Ｄの蓄電池10Ｅ〜10Ｐが充放電可能である。そのため、本実施形態によれば、一部の蓄電池10Ｃが取り外されても機能停止することのない蓄電池システムが提供できる。   According to the present embodiment, the series circuit 1A including the removed storage battery 10C is disconnected from the charging device 2 and the power conversion device 3, and the remaining storage batteries 10E to 10P of the series circuits 1B to 1D can be charged and discharged. Therefore, according to the present embodiment, it is possible to provide a storage battery system that does not stop functioning even when some of the storage batteries 10C are removed.

また、本実施形態の蓄電池システムでは、直列回路１Ａ〜１Ｄが、直列接続された複数の蓄電池10Ａ〜10Ｐと並列に接続される複数のスイッチ11Ａ〜11Ｐを有している。そして、制御装置４は、取り外された蓄電池(例えば、10Ｃ)が直列回路(例えば、１Ａ)に再度接続された場合、開閉器(例えば、５Ａ)を閉成することで蓄電池10Ｃが再接続された直列回路１Ａと充電装置２の出力端及び電力変換装置３の入力端との接続をオンする。また、制御装置４は、充電装置２が充電を行うとき、蓄電池10Ｃが再接続された直列回路１Ａを除く他の直列回路１Ｂ〜１Ｄと充電装置２の出力端との接続をオフするように開閉器５Ｂ〜5Ｄを制御する。さらに、制御装置４は、再接続された蓄電池10Ｃと並列に接続されているスイッチ11Ｃを開くとともに再接続された蓄電池10Ｃに直列接続されている他の複数の蓄電池10Ａ，10Ｂ，10Ｄと並列接続されているスイッチ11Ａ，11Ｂ，11Ｄを閉じる。さらにまた、制御装置４は、再接続された蓄電池10Ｃが他の蓄電池10Ｅ〜10Ｐの電圧に等しい電圧まで充電された後、スイッチスイッチ11Ａ，11Ｂ，11Ｄを開くとともに開閉器５Ｂ〜5Ｄを閉成して全ての直列回路１Ａ〜１Ｄと充電装置２の出力端との接続をオンする。   Moreover, in the storage battery system of this embodiment, series circuit 1A-1D has several switch 11A-11P connected in parallel with several storage battery 10A-10P connected in series. When the removed storage battery (for example, 10C) is reconnected to the series circuit (for example, 1A), the control device 4 reconnects the storage battery 10C by closing the switch (for example, 5A). The connection between the series circuit 1A and the output terminal of the charging device 2 and the input terminal of the power converter 3 is turned on. Further, when the charging device 2 performs charging, the control device 4 turns off the connection between the other series circuits 1B to 1D except the series circuit 1A to which the storage battery 10C is reconnected and the output terminal of the charging device 2. Controls the switches 5B to 5D. Further, the control device 4 opens the switch 11C connected in parallel with the reconnected storage battery 10C and is connected in parallel with the other storage batteries 10A, 10B, 10D connected in series to the reconnected storage battery 10C. Closed switches 11A, 11B, and 11D are closed. Further, the control device 4 opens the switch switches 11A, 11B, 11D and closes the switches 5B-5D after the reconnected storage battery 10C is charged to a voltage equal to the voltage of the other storage batteries 10E-10P. Then, the connection between all the series circuits 1A to 1D and the output terminal of the charging device 2 is turned on.

本実施形態では、再接続された蓄電池10Ｃの容量が他の蓄電池10Ａ，…よりも少ない場合、蓄電池10Ｃのみを先に充電して他の蓄電池10Ａ，…と同等な電圧としてから、全ての蓄電池10Ａ〜10Ｐの充電を行う。そのため、蓄電池10Ａ〜10Ｐの充電レベルを揃えることができる。   In this embodiment, when the capacity of the reconnected storage battery 10C is smaller than that of the other storage batteries 10A,..., Only the storage battery 10C is charged first to obtain a voltage equivalent to that of the other storage batteries 10A,. Charge 10A-10P. Therefore, the charge levels of the storage batteries 10A to 10P can be made uniform.

ところで、本実施形態では全ての直列回路１Ａ〜１Ｄに開閉器５Ａ〜５Ｄに接続して蓄電池10Ａ，…の取り外しを可能としている。しかしながら、複数の直列回路１Ａ〜１Ｄのうちの少なくとも何れか１つの直列回路は、充電装置２の出力端及び電力変換装置３の入力端との間に開閉器が接続されないようしても構わない。すなわち、蓄電池10Ａ，…を取り外すことができる直列回路を一部の直列回路に限定することにより、例えば、３つ乃至４つの直列回路１Ａ，…から蓄電池10Ａ，…が取り外されて蓄電池システムが機能停止してしまうことが防止できる。また、蓄電池10Ａ，…が取り外せない直列回路１Ａ，…には開閉器５Ａ，…や取り外し機構が不要であるから、蓄電池システムの構成の簡略化と製造コストの削減を図ることができる。   In this embodiment, all the series circuits 1A to 1D are connected to the switches 5A to 5D so that the storage batteries 10A can be removed. However, at least one of the plurality of series circuits 1 </ b> A to 1 </ b> D may be configured such that a switch is not connected between the output end of the charging device 2 and the input end of the power conversion device 3. . That is, by limiting the series circuit from which the storage batteries 10A,... Can be removed to some series circuits, for example, the storage batteries 10A,... Are removed from three to four series circuits 1A,. Stopping can be prevented. Further, the series circuits 1A,... From which the storage batteries 10A,... Cannot be removed do not require the switches 5A,... And the removal mechanism, so that the configuration of the storage battery system can be simplified and the manufacturing cost can be reduced.

また、本実施形態の蓄電池システムにおいて、制御装置４は、充電装置２が充電を行うとき、再接続された蓄電池(例えば、10Ｃ)の電圧が、蓄電池10Ｃと直列接続されている他の蓄電池10Ａ，10Ｂ，10Ｄの電圧よりも高ければ、再接続された蓄電池10Ｃと並列に接続されているスイッチ11Ｃを閉じる。また、制御装置４は、再接続された蓄電池10Ｃに直列接続されている他の複数の蓄電池10Ａ，10Ｂ，10Ｄと並列接続されているスイッチ11Ａ，11Ｂ，11Ｄを開く。さらに、制御装置４は、他の蓄電池10Ａ，10Ｂ，10Ｄの電圧が再接続された蓄電池10Ｃの電圧に等しい電圧まで充電された後、スイッチ11Ｃを開くとともに開閉器５Ｂ〜５Ｄを閉成して全ての直列回路１Ａ〜１Ｄと充電装置２の出力端との接続をオンする。   Moreover, in the storage battery system of this embodiment, when the charging device 2 performs charging, the control device 4 has another storage battery 10A in which the voltage of the reconnected storage battery (for example, 10C) is connected in series with the storage battery 10C. , 10B, 10D, the switch 11C connected in parallel with the reconnected storage battery 10C is closed. In addition, the control device 4 opens the switches 11A, 11B, and 11D that are connected in parallel to the other storage batteries 10A, 10B, and 10D that are connected in series to the reconnected storage battery 10C. Furthermore, the control device 4 opens the switch 11C and closes the switches 5B to 5D after the other storage batteries 10A, 10B, and 10D are charged to a voltage equal to the voltage of the reconnected storage battery 10C. All the series circuits 1 </ b> A to 1 </ b> D are connected to the output terminal of the charging device 2.

上述のように本実施形態によれば、取り外されなかった蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐの電圧が、再接続された蓄電池10Ｃの電圧よりも低い(残量が少ない)場合でも、蓄電池10Ａ〜10Ｐの充電レベルを揃えることができる。   As described above, according to the present embodiment, even when the voltages of the storage batteries 10A, 10B, 10D to 10P that have not been removed are lower than the voltage of the reconnected storage battery 10C (remaining amount is low), the storage batteries 10A to 10A. 10P charge level can be aligned.

また、本実施形態の蓄電池システムにおいて、制御装置４は、充電装置２が充電を行うことができないとき、再接続された蓄電池(例えば、10Ｃ)と並列に接続されているスイッチ11Ｃを開く。また、制御装置４は、再接続され蓄電池10Ｃを除く他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐから放電される電荷で再接続された蓄電池10Ｃを充電するようにスイッチ11Ａ〜11Ｐ及び開閉器５Ａ〜５Ｄを制御する。さらに、制御装置４は、再接続された蓄電池10Ｃが他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐの電圧に等しい電圧まで充電された後、スイッチ11Ａ〜11Ｐを開く。さらにまた、制御装置４は、開閉器５Ａ〜５Ｄを閉成して全ての直列回路１Ａ〜１Ｄと充電装置２の出力端及び電力変換装置３の入力端との接続をオンする。   Moreover, in the storage battery system of this embodiment, the control apparatus 4 opens the switch 11C connected in parallel with the reconnected storage battery (for example, 10C), when the charging device 2 cannot charge. Further, the control device 4 switches the switches 11A to 11P and the switches 5A to 5C so as to charge the reconnected storage battery 10C with electric charges discharged from the other storage batteries 10A, 10B, 10D to 10P except the storage battery 10C. Control 5D. Further, the control device 4 opens the switches 11A to 11P after the reconnected storage battery 10C is charged to a voltage equal to the voltage of the other storage batteries 10A, 10B, 10D to 10P. Furthermore, the control device 4 closes the switches 5 </ b> A to 5 </ b> D and turns on the connection between all the series circuits 1 </ b> A to 1 </ b> D and the output end of the charging device 2 and the input end of the power conversion device 3.

つまり、太陽電池や電力系統からの給電が停止している場合、充電装置２が充電を行うことができない。そこで、制御装置４は、充電装置２が充電を行うことができないと判断すれば、再接続された蓄電池10Ｃに対して、他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐから充電を行うように開閉器５Ａ〜５Ｄやスイッチ11Ａ〜11Ｐを制御する。例えば、制御装置４は、再接続された蓄電池10Ｃを、他の蓄電池10Ａ，10Ｂ，10Ｄ〜10Ｐと１台ずつ順番に接続して充電する。その結果、充電装置２が充電できない状況においても、蓄電池10Ａ〜10Ｐの充電レベルを揃えることができる。   That is, when the power supply from the solar battery or the power system is stopped, the charging device 2 cannot perform charging. Therefore, if the control device 4 determines that the charging device 2 cannot charge, the switch is configured to charge the reconnected storage battery 10C from the other storage batteries 10A, 10B, 10D to 10P. 5A to 5D and switches 11A to 11P are controlled. For example, the control device 4 charges the reconnected storage battery 10C by connecting to the other storage batteries 10A, 10B, 10D to 10P one by one in order. As a result, even in a situation where the charging device 2 cannot be charged, the charge levels of the storage batteries 10A to 10P can be made uniform.

また、本実施形態の蓄電池システムにおいて、直列回路１Ａ〜１Ｄに含まれる複数の蓄電池10Ａ〜10Ｐのうちで残量が最も多い蓄電池10Ａ〜10Ｐを通知する通知手段を備えることが好ましい。通知手段は、例えば、制御装置４によって点滅制御される発光素子(発光ダイオードなど)で構成することができる。   Moreover, in the storage battery system of this embodiment, it is preferable to provide notification means for notifying the storage batteries 10A to 10P having the largest remaining amount among the plurality of storage batteries 10A to 10P included in the series circuits 1A to 1D. The notification means can be constituted by, for example, a light emitting element (such as a light emitting diode) that is controlled to blink by the control device 4.

通知手段(発光素子)は、取り外し機構とともにトランクルームの床下などに配置される。制御装置４は、例えば、トランクの扉が開けられたとき、残量が最も多い蓄電池10Ａ〜10Ｐに対応した発光素子を発光させる。故に、利用者は、発光素子の発光によって最も残量の多い蓄電池10Ａ〜10Ｐを選んで取り外し、使用することができる。なお、最も残量の多い蓄電池10Ａ〜10Ｐが複数あった場合、制御装置４は、これら複数の蓄電池10Ａ〜10Ｐのうちで取り外された回数が最も少ない蓄電池10Ａ〜10Ｐに対応した発光素子を発光させることが好ましい。例えば、蓄電池10Ｃ，10Ｄの残容量が等しく且つ最も多い場合において、蓄電池10Ｃの取り外し回数が１０回、蓄電池10Ｄの取り外し回数が２０回であると仮定する。このとき、制御装置４は、取り外し回数が少ない方の蓄電池10Ｃに対応した発光素子を発光させれば良い。   The notification means (light emitting element) is disposed under the floor of the trunk room together with the removal mechanism. For example, when the trunk door is opened, the control device 4 causes the light emitting elements corresponding to the storage batteries 10A to 10P having the largest remaining amount to emit light. Therefore, the user can select and remove and use the storage batteries 10A to 10P with the largest remaining amount by the light emission of the light emitting element. In addition, when there are a plurality of storage batteries 10A to 10P with the largest remaining amount, the control device 4 emits light emitting elements corresponding to the storage batteries 10A to 10P with the least number of removals among the plurality of storage batteries 10A to 10P. It is preferable to make it. For example, it is assumed that when the remaining capacity of the storage batteries 10C and 10D is equal and the largest, the number of removals of the storage battery 10C is 10 times and the number of removals of the storage battery 10D is 20 times. At this time, the control apparatus 4 should just light-emit the light emitting element corresponding to the storage battery 10C with the smaller frequency | count of removal.

１Ａ〜１Ｄ 直列回路
２ 充電装置
３ 電力変換装置
４ 制御装置
５Ａ〜５Ｄ 開閉器
10Ａ〜10Ｐ 蓄電池 1A to 1D Series Circuit 2 Charging Device 3 Power Converter 4 Controller 5A to 5D Switch
10A-10P storage battery

Claims (7)

可搬型の複数の蓄電池が直列に接続された複数の直列回路と、充電電流を出力する出力端間に複数の前記直列回路が並列接続される充電装置と、前記蓄電池から放電される直流電力を電力変換する電力変換装置と、前記充電装置の出力端及び前記電力変換装置の入力端と少なくとも何れか１つの前記直列回路との間の電路を開閉する１乃至複数の開閉器と、前記開閉器を制御して前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオン・オフする制御装置とを備え、
前記制御装置は、何れかの前記直列回路から前記蓄電池が取り外された場合、前記開閉器を開成することで前記蓄電池が取り外された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオフし、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることを特徴とする蓄電池システム。 A plurality of series circuits in which a plurality of portable storage batteries are connected in series, a charging device in which a plurality of the series circuits are connected in parallel between output terminals that output a charging current, and a DC power discharged from the storage battery A power conversion device that performs power conversion, one or more switches that open and close an electric circuit between an output end of the charging device, an input end of the power conversion device, and at least one of the series circuits; and the switch A control device for controlling the connection between the series circuit and the output end of the charging device and the input end of the power converter,
When the storage battery is removed from any of the series circuits, the control device opens the switch to open the switch, the series circuit from which the storage battery is removed, the output terminal of the charging device, and the power conversion device. When the connection with the input terminal is turned off and the removed storage battery is connected to the series circuit again, the series circuit with the storage battery reconnected by closing the switch and the output of the charging device The storage battery system characterized by turning on the connection between the end and the input end of the power converter. 前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、
前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うとき、前記蓄電池が再接続された前記直列回路を除く他の前記直列回路と前記充電装置の出力端との接続をオフするように前記開閉器を制御し、且つ前記再接続された蓄電池と並列に接続されている前記スイッチを開くとともに前記再接続された蓄電池に直列接続されている他の複数の前記蓄電池と並列接続されている前記スイッチを閉じ、前記再接続された蓄電池が他の前記蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることを特徴とする請求項１記載の蓄電池システム。 The series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series,
When the removed storage battery is reconnected to the series circuit, the control device closes the switch to reconnect the storage battery, the output terminal of the charging device, and the power When the connection with the input terminal of the converter is turned on, and when the charging device performs charging, the connection between the other series circuit except the series circuit to which the storage battery is reconnected and the output terminal of the charging device A plurality of other storage batteries connected to the reconnected storage battery in series and open the switch connected in parallel with the reconnected storage battery. After closing the switch connected in parallel and charging the reconnected storage battery to a voltage equal to the voltage of the other storage battery, open the switch and close the switch. Storage battery system according to claim 1, characterized in that on the connection between the input end of the output terminal and the power conversion device of the charging device and said series circuit. 複数の前記直列回路のうちの少なくとも何れか１つの直列回路は、前記充電装置の出力端及び前記電力変換装置の入力端との間に前記開閉器が接続されないことを特徴とする請求項１又は２記載の蓄電池システム。   The switch is not connected between the output terminal of the charging device and the input terminal of the power conversion device in at least one of the plurality of series circuits. 2. The storage battery system according to 2. 前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、
前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うとき、前記蓄電池が再接続された前記直列回路を除く他の前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオフするように前記開閉器を制御し、且つ前記再接続された蓄電池の電圧が、当該蓄電池と直列接続されている他の前記蓄電池の電圧よりも高ければ、前記再接続された蓄電池と並列に接続されている前記スイッチを閉じるとともに前記再接続された蓄電池に直列接続されている他の複数の前記蓄電池と並列接続されている前記スイッチを開き、前記他の蓄電池が前記再接続された蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることを特徴とする請求項１〜３の何れか１項に記載の蓄電池システム。 The series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series,
When the removed storage battery is reconnected to the series circuit, the control device closes the switch to reconnect the storage battery, the output terminal of the charging device, and the power When the connection with the input terminal of the converter is turned on, and when the charging device performs charging, the other series circuit except the series circuit to which the storage battery is reconnected, the output terminal of the charging device, and the power If the switch is controlled to turn off the connection with the input terminal of the converter, and the voltage of the reconnected storage battery is higher than the voltage of the other storage battery connected in series with the storage battery, The switch connected in parallel with the reconnected storage battery is closed and the switch connected in parallel with the plurality of other storage batteries connected in series to the reconnected storage battery is opened. After the other storage battery is charged to a voltage equal to the voltage of the reconnected storage battery, the switch is opened and the switch is closed to all the series circuits, the output terminals of the charging device, and the Connection with the input terminal of a power converter device is turned ON, The storage battery system of any one of Claims 1-3 characterized by the above-mentioned. 前記直列回路は、直列接続された複数の前記蓄電池と並列に接続される複数のスイッチを有し、
前記制御装置は、取り外された前記蓄電池が前記直列回路に再度接続された場合、前記開閉器を閉成することで前記蓄電池が再接続された前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンし、さらに、前記充電装置が充電を行うことができないとき、前記再接続された蓄電池と並列に接続されている前記スイッチを開くとともに、前記再接続され蓄電池を除く他の蓄電池から放電される電荷で前記再接続された蓄電池を充電するように前記スイッチ及び前記開閉器を制御し、前記再接続された蓄電池が他の前記蓄電池の電圧に等しい電圧まで充電された後、前記スイッチを開くとともに前記開閉器を閉成して全ての前記直列回路と前記充電装置の出力端及び前記電力変換装置の入力端との接続をオンすることを特徴とする請求項１〜４の何れか１項に記載の蓄電池システム。 The series circuit has a plurality of switches connected in parallel with the plurality of storage batteries connected in series,
When the removed storage battery is reconnected to the series circuit, the control device closes the switch to reconnect the storage battery, the output terminal of the charging device, and the power When the connection with the input terminal of the conversion device is turned on, and when the charging device cannot be charged, the switch connected in parallel with the reconnected storage battery is opened and the reconnected storage battery The switch and the switch are controlled so as to charge the reconnected storage battery with the electric charge discharged from the other storage battery except the battery, and the reconnected storage battery is charged to a voltage equal to the voltage of the other storage battery. After that, the switch is opened and the switch is closed to turn on the connection between all the series circuits and the output terminal of the charging device and the input terminal of the power converter. Battery system according to any one of claims 1 to 4, characterized in. 前記直列回路に含まれる複数の前記蓄電池のうちで残量が最も多い前記蓄電池を通知する通知手段を備えることを特徴とする請求項１〜５の何れか１項に記載の蓄電池システム。   The storage battery system according to claim 1, further comprising a notification unit that notifies the storage battery having the largest remaining amount among the plurality of storage batteries included in the series circuit. 前記通知手段は、残量が最も少ない前記蓄電池が複数存在する場合、取り外された回数が最も少ない前記蓄電池を通知することを特徴とする請求項６記載の蓄電池システム。   The storage battery system according to claim 6, wherein when there are a plurality of the storage batteries with the smallest remaining amount, the notification means notifies the storage battery with the least number of removals.
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