JP2012044788A - Battery - Google Patents

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JP2012044788A
JP2012044788A JP2010184337A JP2010184337A JP2012044788A JP 2012044788 A JP2012044788 A JP 2012044788A JP 2010184337 A JP2010184337 A JP 2010184337A JP 2010184337 A JP2010184337 A JP 2010184337A JP 2012044788 A JP2012044788 A JP 2012044788A
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battery
circuit
battery cell
booster circuit
voltage
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JP5635837B2 (en
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Masakatsu Sato
正勝 佐藤
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NEC Personal Computers Ltd
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NEC Personal Computers 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide implementation of battery refreshment without users' awareness.SOLUTION: The battery 1 is configured so that a plurality of battery cells 111, 121 are connected with a plurality of circuit systems arranged in parallel and an output of the battery cell connected with the one circuit system is connected to a booster circuit 102 that boosts the output to be higher than a voltage of the battery cell connected to the other circuit systems.

Description

本発明は、バッテリに関し、特に、メモリ効果を有する二次電池のバッテリリフレッシュに関する。   The present invention relates to a battery, and more particularly, to a battery refresh of a secondary battery having a memory effect.

Ｎｉ−Ｃｄ、Ｎｉ−ＭＨ電池等を用いた二次バッテリにおいては、その容量のほぼすべてを使い切らない、電荷が十分に残っている状態で継ぎ足し充電を繰り返すと、電荷が残っているにもかかわらず放電電圧が低下し、結果として容量が減少したように見える。このような現象は、二次バッテリが充電要求時における充電レベルを記憶してしまう、とも考えられ、「メモリ効果」と称される。メモリ効果は、深い放電を強制的に行うこと（バッテリリフレッシュ）で解消される。   In secondary batteries using Ni-Cd, Ni-MH batteries, etc., when almost all of the capacity is not used up and charging is repeated with sufficient charge remaining, the charge remains even though the charge remains. It seems that the discharge voltage is lowered and the capacity is reduced as a result. Such a phenomenon is also considered that the secondary battery stores the charge level at the time of charge request, and is referred to as “memory effect”. The memory effect is eliminated by forcing deep discharge (battery refresh).

バッテリリフレッシュについては、例えば特許文献１の先行技術文献がある。特許文献１は、リフレッシュ放電には相当の時間を要すること、さらに続けて充電も行う必要があることを指摘し、バッテリリフレッシュがトータルでかなりの時間を要するため不便であることを問題点として挙げている。その上で、リフレッシュ放電時に使用されていない放電抵抗を並列に接続して実質的に抵抗値を低減し、放電電流を大きくすることでリフレッシュ放電を短時間で行う構成としている。   Regarding battery refreshing, for example, there is a prior art document of Patent Document 1. Patent Document 1 points out that a considerable amount of time is required for refresh discharge, and that it is also necessary to perform subsequent charging. The problem is that the battery refresh is inconvenient because it requires a considerable amount of time. ing. In addition, a discharge resistor that is not used at the time of refresh discharge is connected in parallel to substantially reduce the resistance value, and the discharge current is increased to perform refresh discharge in a short time.

特開２００５−１８４８９８号公報JP 2005-184898 A

ところで、特許文献１を含む従来の技術では、バッテリリフレッシュが必要な時期を機器が測定し、実施するかどうかの判断はユーザの選択に依存している（例えば特許文献１では段落００２０参照）。   By the way, in the conventional techniques including Patent Document 1, the device measures the time when the battery refresh is necessary and determines whether or not to perform the operation depends on the user's selection (for example, refer to Paragraph 0020 in Patent Document 1).

バッテリリフレッシュのタイミングがユーザの選択に依存することの理由は、通常バッテリリフレッシュを行う際はバッテリを使用することはできず、通常の機器使用状態ではなく特別な状態（機器不使用状態等）に機器を置くか、又は、機器動作を制限する必要があるためであると考えられる。通常は、特別な状態や機器動作制限をユーザが状況に応じて選択する必要がある。   The reason why the battery refresh timing depends on the user's selection is that the battery cannot be used during normal battery refresh and is not in the normal device use state but in a special state (device not used state, etc.) This is considered to be because it is necessary to place the device or restrict the device operation. Usually, it is necessary for the user to select a special state or device operation restriction according to the situation.

そこで本発明は、上記実情に鑑みて、バッテリリフレッシュの実行をユーザが意識することなく可能なバッテリを提供することを目的とする。   In view of the above circumstances, an object of the present invention is to provide a battery capable of performing battery refresh without the user being aware of it.

上記目的を達成するために本発明は、並列に配置された複数の回路系統に複数のバッテリセルが接続され、一の回路系統に接続されたバッテリセルの出力を、他の回路系統に接続されたバッテリセルの電圧よりも高く昇圧する昇圧回路に接続可能なことを特徴とする、バッテリを提供するものである。   In order to achieve the above object, according to the present invention, a plurality of battery cells are connected to a plurality of circuit systems arranged in parallel, and the output of the battery cell connected to one circuit system is connected to another circuit system. The present invention provides a battery that can be connected to a booster circuit that boosts the voltage higher than the voltage of the battery cell.

本発明によれば、バッテリリフレッシュの実行をユーザが意識することなく可能なバッテリを提供することが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the battery which can perform execution of battery refreshing without a user being conscious.

本発明による実施形態の回路構成を示す回路図（充放電可能状態）である。It is a circuit diagram (chargeable / dischargeable state) showing a circuit configuration of an embodiment according to the present invention. 本発明による実施形態の回路構成を示す回路図（１つ目のバッテリセルのバッテリリフレッシュ状態）である。It is a circuit diagram (battery refresh state of the 1st battery cell) which shows the circuit composition of the embodiment by the present invention. 本発明による実施形態の回路構成を示す回路図（２つ目のバッテリセルのバッテリリフレッシュ状態）である。It is a circuit diagram (battery refresh state of the 2nd battery cell) which shows the circuit composition of the embodiment by the present invention.

以下、本発明を実施するための形態について図面を参照して説明する。
図１ないし図３に、本実施形態の回路構成を示す。 Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
1 to 3 show a circuit configuration of the present embodiment.

図１は、本実施形態に係るバッテリ１が充放電可能な状態に置かれているときの回路構成を示している。
バッテリ１は、限定するものではないが、例えば、ノートパソコンに電力を供給するバッテリパックとして用いることができる。バッテリ１は、電力供給の対象である機器、又は、商用電源等と、端子１０６、１０９にて接続する。 FIG. 1 shows a circuit configuration when the battery 1 according to the present embodiment is placed in a chargeable / dischargeable state.
The battery 1 is not limited, but can be used as, for example, a battery pack that supplies power to a notebook computer. The battery 1 is connected to a device to which power is supplied, a commercial power source, or the like at terminals 106 and 109.

バッテリ１は、端子１０６と端子１０９間の電源経路に、バッテリ１の容量を計測するための抵抗１０５を有する。抵抗１０５の後段には、バッテリセル１１１とバッテリセル１２１と昇圧回路１０２が並列に接続する。バッテリセル１１１とバッテリセル１２１は、ニッケル水素やリチウムイオン電池などの二次電池のバッテリセルである。   The battery 1 has a resistor 105 for measuring the capacity of the battery 1 in the power supply path between the terminal 106 and the terminal 109. At the subsequent stage of the resistor 105, the battery cell 111, the battery cell 121, and the booster circuit 102 are connected in parallel. The battery cell 111 and the battery cell 121 are battery cells of secondary batteries such as nickel metal hydride and lithium ion batteries.

バッテリセル１１１のプラス側には回路の接続状態を切り替えるスイッチ回路１１２が接続する。バッテリセル１１１のリフレッシュ時にはスイッチ回路１１２が制御ＩＣ１０１の制御によりＯＮすることによって、バッテリセル１１１が昇圧回路１０２に接続する（図２参照）。   A switch circuit 112 for switching the circuit connection state is connected to the positive side of the battery cell 111. When the battery cell 111 is refreshed, the switch circuit 112 is turned on under the control of the control IC 101, whereby the battery cell 111 is connected to the booster circuit 102 (see FIG. 2).

バッテリセル１２１のプラス側には回路の接続状態を切り替えるスイッチ回路１２２が接続する。バッテリセル１２１のリフレッシュ時にはスイッチ回路１２２が制御ＩＣ１０１の制御によりＯＮすることによって、バッテリセル１２１が昇圧回路１０２に接続する（図３参照）。   A switch circuit 122 for switching the circuit connection state is connected to the positive side of the battery cell 121. When the battery cell 121 is refreshed, the switch circuit 122 is turned on under the control of the control IC 101, whereby the battery cell 121 is connected to the booster circuit 102 (see FIG. 3).

なお、バッテリ１が内蔵するバッテリセルの数は、本実施形態の態様に限定しない。すなわち、バッテリ１は、複数個のバッテリセルを並列接続で内蔵する。   The number of battery cells built in the battery 1 is not limited to the aspect of this embodiment. That is, the battery 1 incorporates a plurality of battery cells in parallel connection.

また、バッテリ１は、制御ＩＣ１０１を内蔵する。制御ＩＣ１０１は、バッテリセル１１１、１２１を電源として動作し、バッテリセル１１１、１２１の電圧電流を監視することでバッテリセル１１１、１２１の絶対容量を管理する。また、制御ＩＣ１０１は、外部接続端子１０７、１０８によりバッテリ１の情報（電流状態や温度など）を外部の機器に提供する。   The battery 1 includes a control IC 101. The control IC 101 operates with the battery cells 111 and 121 as power sources, and manages the absolute capacity of the battery cells 111 and 121 by monitoring the voltage and current of the battery cells 111 and 121. Further, the control IC 101 provides information (current state, temperature, etc.) of the battery 1 to an external device through the external connection terminals 107 and 108.

制御ＩＣ１０１は、バッテリ１が外部機器と接続されておらずバッテリセル１１１、１２１が外部機器と接続されていない状態では、電源経路のスイッチ１０４をＯＦＦすることで外部に対して充放電を禁止し、また、制御ＩＣ１０１自身も低消費電力モードに設定し、バッテリの消費を抑える。   When the battery 1 is not connected to an external device and the battery cells 111 and 121 are not connected to the external device, the control IC 101 prohibits charging / discharging to the outside by turning off the switch 104 of the power supply path. In addition, the control IC 101 itself is set to the low power consumption mode to suppress battery consumption.

制御ＩＣ１０１は、バッテリ１が端子１０６、１０９を介して外部機器等と接続されると、充放電可能な状態を判断し、スイッチ１０４をＯＮにして充電、放電が可能になる。   When the battery 1 is connected to an external device or the like via the terminals 106 and 109, the control IC 101 determines a chargeable / dischargeable state and turns on the switch 104 to allow charging and discharging.

制御ＩＣ１０１は、スイッチ回路１１２とスイッチ回路１２２の切替も制御する（図１では繁雑になるのを避けるためスイッチ回路１１２へ延びる制御信号の流れの図示を省略している）。切替は交互に行い、充電又は放電がバッテリごとに切り替わって行われる。   The control IC 101 also controls switching between the switch circuit 112 and the switch circuit 122 (in FIG. 1, the flow of a control signal extending to the switch circuit 112 is omitted in order to avoid complication). Switching is performed alternately, and charging or discharging is performed for each battery.

制御ＩＣ１０１は、バッテリセル１１１、１２１の電圧も監視する。さらに、抵抗１０５から充放電電流値を監視することにより、バッテリの容量を計測する。   The control IC 101 also monitors the voltages of the battery cells 111 and 121. Further, the battery capacity is measured by monitoring the charge / discharge current value from the resistor 105.

昇圧回路１０２は、スイッチ回路１１２及びスイッチ回路１２２で特定されたバッテリを入力源としてバッテリ電圧より高い電圧を生成する。また、昇圧回路１０２は、定電圧、定電流制御により規定以上の電流を制限することでバッテリセル１１１、１２１の特性にあった放電を行う。   The booster circuit 102 generates a voltage higher than the battery voltage using the battery specified by the switch circuit 112 and the switch circuit 122 as an input source. Further, the booster circuit 102 discharges in accordance with the characteristics of the battery cells 111 and 121 by limiting a current exceeding a specified value by constant voltage and constant current control.

また、昇圧回路１０２は、外部機器が接続されていない場合は、残りのバッテリに充電し、特定されたバッテリを完全放電（すなわち、バッテリリフレッシュ）する。ここで、制御ＩＣ１０１は、特定されたバッテリのリフレッシュが完了するように、バッテリの残容量と昇圧回路効率を考慮してリフレッシュされていないバッテリに充電する。   When the external device is not connected, the booster circuit 102 charges the remaining battery and completely discharges the specified battery (that is, battery refresh). Here, the control IC 101 charges an unrefreshed battery in consideration of the remaining capacity of the battery and the booster circuit efficiency so that the refresh of the specified battery is completed.

ダイオード１０３は整流器であって、電流の逆流を防ぐ。昇圧回路１０２の内部に組み込んでもよい。バッテリセル１１１又は１２１がバッテリリフレッシュ状態にある場合（すなわち、図２又は図３に示す状態）であって、バッテリ１が端子１０６、１０９を介して外部機器と接続している状態のとき、リフレッシュ中のバッテリは昇圧回路１０２により、リフレッシュされていないバッテリのバッテリ電圧より高いため、ダイオードＯＲによる切替回路を経由し、リフレッシュ中のバッテリが優先して放電される。   The diode 103 is a rectifier and prevents reverse current flow. It may be incorporated in the booster circuit 102. When the battery cell 111 or 121 is in the battery refresh state (that is, the state shown in FIG. 2 or FIG. 3), the battery 1 is refreshed when connected to an external device via the terminals 106 and 109. Since the battery inside is higher than the battery voltage of the battery that has not been refreshed by the booster circuit 102, the battery being refreshed is discharged preferentially via the switching circuit by the diode OR.

以上で、バッテリ１が充放電可能な状態の本実施形態の構成について述べた。次に、バッテリ１が内蔵の各バッテリをバッテリリフレッシュする際の構成について図２、図３を参照して説明する。   The configuration of this embodiment in a state where the battery 1 can be charged and discharged has been described above. Next, a configuration when the battery 1 refreshes each battery built in the battery 1 will be described with reference to FIGS.

バッテリリフレッシュするタイミングについては、例えばユーザが所定の回数（１００回など）充放電を繰り返したというような充放電の回数（充放電サイクル）や前回のバッテリリフレッシュから所定の月数が経過したこと（使用期間）などを、制御ＩＣ１０１が判定して、自動的に実行する。   Regarding the battery refresh timing, for example, the number of times of charging / discharging (charging / discharging cycle) that the user has repeated charging / discharging a predetermined number of times (100 times, etc.) or that a predetermined number of months have passed since the previous battery refresh ( The use period) is determined by the control IC 101 and automatically executed.

しかしながら、バッテリリフレッシュを自動的に実行しても、その間ユーザが機器をバッテリ１に接続できないようであれば、ユーザにバッテリリフレッシュを意識させてしまうことになる。したがって、本実施形態では、複数のバッテリを並列接続し、各バッテリを１つずつバッテリリフレッシュする。したがって、バッテリリフレッシュ中でも機器を接続して利用可能であり、ユーザはバッテリリフレッシュを意識することがない。   However, even if the battery refresh is automatically executed, if the user cannot connect the device to the battery 1 during that time, the user is made aware of the battery refresh. Therefore, in this embodiment, a plurality of batteries are connected in parallel, and each battery is refreshed one by one. Therefore, it is possible to connect and use the device even during the battery refresh, and the user is not aware of the battery refresh.

図２、図３を参照して以下ではまず、外部機器が接続されていない状態におけるバッテリリフレッシュについて説明する。   In the following, referring to FIGS. 2 and 3, first, battery refresh in a state in which no external device is connected will be described.

バッテリリフレッシュが開始されると、図２に示すように、制御ＩＣ１０１の制御によりスイッチ回路１１２が電源経路を変更することによって、１つ目のバッテリ（図２ではバッテリセル１１１）が昇圧回路１０２に接続する。   When the battery refresh is started, as shown in FIG. 2, the switch circuit 112 changes the power supply path under the control of the control IC 101, whereby the first battery (battery cell 111 in FIG. 2) is transferred to the booster circuit 102. Connecting.

昇圧回路１０２は、バッテリセル１１１を入力源としてバッテリセル１２１より高い電圧を生成する。昇圧回路によって昇圧された電源は、バッテリセル１２１に充電される。
図２に示す状態のとき、バッテリセル１１１はバッテリリフレッシュ状態、バッテリセル１２１は充放電可能状態である。 The booster circuit 102 generates a voltage higher than that of the battery cell 121 using the battery cell 111 as an input source. The battery cell 121 is charged with the power source boosted by the booster circuit.
In the state shown in FIG. 2, the battery cell 111 is in a battery refresh state, and the battery cell 121 is in a chargeable / dischargeable state.

バッテリセル１１１が十分に放電すると、制御ＩＣ１０１は、昇圧回路１０２をＯＦＦして、スイッチ回路１１２とスイッチ回路１２２を図３に示すような状態に制御する。その結果電源経路が変更され、バッテリセル１１１が充放電可能状態、バッテリ１２２がバッテリリフレッシュ状態となる。   When the battery cell 111 is sufficiently discharged, the control IC 101 turns off the booster circuit 102 and controls the switch circuit 112 and the switch circuit 122 to a state as shown in FIG. As a result, the power supply path is changed, and the battery cell 111 enters a chargeable / dischargeable state and the battery 122 enters a battery refresh state.

各バッテリが十分に放電したか否かは、昇圧回路１０２により昇圧されるバッテリの電圧が、昇圧回路１０２による昇圧が不能なまでに低下した場合に十分に放電したと判断するとよい。   Whether or not each battery has been sufficiently discharged may be determined as having been sufficiently discharged when the voltage of the battery boosted by the booster circuit 102 has dropped to the point where boosting by the booster circuit 102 is impossible.

或いは、昇圧回路１０２により昇圧されるバッテリの電圧が、バッテリ１に接続する外部機器の最低起動電圧を下回るまで低下した場合に十分に放電したと判断するとよい。最低起動電圧は、外部機器ごとに異なり、あらかじめ制御ＩＣ１０１に設定する。   Alternatively, it may be determined that the battery has been sufficiently discharged when the voltage of the battery boosted by the booster circuit 102 has dropped below the minimum startup voltage of the external device connected to the battery 1. The minimum startup voltage differs for each external device and is set in the control IC 101 in advance.

以下では次に、外部機器が接続されている状態におけるバッテリリフレッシュについて説明する。   Next, the battery refresh in the state where the external device is connected will be described below.

外部機器が接続されている場合は、リフレッシュ中のバッテリの見かけの電圧が昇圧回路１０２による昇圧によって、リフレッシュされていないバッテリ電圧より高いため、ダイオードＯＲによる切替回路を経由し、リフレッシュ中のバッテリが優先して放電される（図２の状態）。   When an external device is connected, the apparent voltage of the battery being refreshed is higher than the battery voltage not being refreshed by boosting by the booster circuit 102, so that the battery being refreshed passes through the switching circuit by the diode OR. It is discharged preferentially (state shown in FIG. 2).

１つ目のバッテリのバッテリリフレッシュ後、制御ＩＣ１０１は、昇圧回路１０２をＯＦＦして、スイッチ回路１１２とスイッチ回路１２２を図３に示すような状態に制御する。その結果電源経路が変更され、バッテリセル１１１が充放電可能状態、バッテリ１２２がバッテリリフレッシュ状態となる。   After the battery refresh of the first battery, the control IC 101 turns off the booster circuit 102 and controls the switch circuit 112 and the switch circuit 122 to a state as shown in FIG. As a result, the power supply path is changed, and the battery cell 111 enters a chargeable / dischargeable state and the battery 122 enters a battery refresh state.

なお、バッテリ１に外部機器が接続している状態のとき、バッテリ１は、機器負荷に応じて端子１０９から充電又は端子１０６から放電をする。図３の状態のときに、機器負荷が昇圧回路１０２で設定された電流を超える場合は、昇圧回路１０２の電圧がバッテリセル１１１より低くなるため、バッテリセル１１１から放電される。一方で、機器負荷が昇圧回路１０２で設定された電流より小さい場合は、昇圧回路１０２から電力を供給するので、バッテリセル１２１から放電される。   When an external device is connected to the battery 1, the battery 1 is charged from the terminal 109 or discharged from the terminal 106 depending on the device load. In the state of FIG. 3, when the device load exceeds the current set by the booster circuit 102, the voltage of the booster circuit 102 becomes lower than that of the battery cell 111, so that the battery cell 111 is discharged. On the other hand, when the device load is smaller than the current set by the booster circuit 102, the battery cell 121 is discharged because electric power is supplied from the booster circuit 102.

このような動作の理由は、機器負荷が所定の電圧を要求し、機器の状態に応じて必要な電流量が変動するためである。昇圧回路１０２は、機器負荷所定の電圧（バッテリセル１２１の素の電圧より高い）に昇圧し、定電圧・定電流制御を行って機器負荷に供給する。すなわち、例えば定格１２Ｗの昇圧回路で６Ｖに昇圧して機器負荷に供給しようとしたときに、機器負荷が５Ｖ３Ａ（１５Ｗ）を要求すると、６Ｖ２Ａ→５Ｖ２．４Ａ→４Ｖ３Ａのように出力電圧を下げながら定格上限で出力しようとする。   The reason for such an operation is that the device load requires a predetermined voltage, and the necessary amount of current varies depending on the state of the device. The booster circuit 102 boosts the device load to a predetermined voltage (higher than the original voltage of the battery cell 121), performs constant voltage / constant current control, and supplies the device load to the device load. That is, for example, when a booster circuit with a rated 12W boosts the voltage to 6V and supplies it to the device load, if the device load requires 5V3A (15W), the output voltage is lowered as 6V2A → 5V2.4A → 4V3A. Attempts to output at the rated upper limit.

機器負荷の要求を昇圧回路１０２側から所定電圧で供給できれば昇圧回路１０２側から、昇圧回路１０２側から所定電圧で供給しきれなくなると、昇圧回路１０２の出力電圧の低下に伴ってバッテリセル１１１側から、電流が供給される。上記の例では、５Ｖまでは昇圧回路１０２側から、５Ｖを下回るとバッテリセル１１１側から、電流が供給される。   If the device load request can be supplied at a predetermined voltage from the booster circuit 102 side, and if it cannot be supplied at the predetermined voltage from the booster circuit 102 side, the battery cell 111 side is reduced as the output voltage of the booster circuit 102 decreases. Current is supplied. In the above example, up to 5V is supplied from the booster circuit 102 side, and below 5V, current is supplied from the battery cell 111 side.

以上に説明した本実施形態によれば、バッテリリフレッシュ中であってもバッテリ１に接続する外部機器は動作するため、ユーザが意識することなくバッテリリフレッシュの実行が可能になる。   According to the present embodiment described above, since the external device connected to the battery 1 operates even during the battery refresh, the battery refresh can be executed without the user being aware of it.

１ バッテリ
１０１ 制御ＩＣ
１０２ 昇圧回路
１０３ ダイオード
１０４ スイッチ
１０５ 抵抗
１０６〜１０９ 端子
１１１、１２１ バッテリセル
１１２、１２２ スイッチ回路 1 Battery 101 Control IC
DESCRIPTION OF SYMBOLS 102 Booster circuit 103 Diode 104 Switch 105 Resistance 106-109 Terminal 111, 121 Battery cell 112, 122 Switch circuit

Claims (4)

並列に配置された複数の回路系統に複数のバッテリセルが接続され、一の回路系統に接続されたバッテリセルの出力を、他の回路系統に接続されたバッテリセルの電圧よりも高く昇圧する昇圧回路に接続可能なことを特徴とする、バッテリ。   A plurality of battery cells are connected to a plurality of circuit systems arranged in parallel, and the output of the battery cell connected to one circuit system is boosted higher than the voltage of the battery cell connected to the other circuit system A battery characterized in that it can be connected to a circuit. 前記一の回路系統に接続されたバッテリセルの出力を前記他の回路系統に接続されたバッテリセルの電圧よりも高く昇圧できなくなると、前記一の回路系統に接続されたバッテリセルに替えて他の回路系統のうち一の回路系統に接続されたバッテリセルの出力を、前記昇圧回路に接続することを特徴とする、請求項１記載のバッテリ。   If the output of the battery cell connected to the one circuit system cannot be boosted higher than the voltage of the battery cell connected to the other circuit system, the battery cell connected to the one circuit system is replaced with another battery cell. The battery according to claim 1, wherein an output of a battery cell connected to one circuit system among the circuit systems is connected to the booster circuit. 前記昇圧回路は、前記バッテリに外部機器が接続していない状態のとき、前記昇圧回路が昇圧する回路系統に接続されたバッテリセルの放電電流により、他の回路系統に接続されたバッテリセルを充電することを特徴とする、請求項１又は２記載のバッテリ。   The booster circuit charges a battery cell connected to another circuit system by a discharge current of the battery cell connected to the circuit system boosted by the booster circuit when no external device is connected to the battery. The battery according to claim 1 or 2, characterized in that: 前記昇圧回路は、前記バッテリに外部機器が接続している状態のとき、前記昇圧回路が昇圧する回路系統に接続されたバッテリセルの放電電流を前記外部機器へ電力を供給する経路へ経由させ、出力を他の回路系統に接続されたバッテリセルの電圧よりも高く昇圧することによって優先して放電することを特徴とする、請求項１から３のいずれか１項記載のバッテリ。   When the booster circuit is in a state where an external device is connected to the battery, the discharge current of the battery cell connected to the circuit system boosted by the booster circuit is routed to a path for supplying power to the external device, 4. The battery according to claim 1, wherein the output is preferentially discharged by boosting the output higher than the voltage of a battery cell connected to another circuit system. 5.
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