JP6090103B2 - Power supply - Google Patents

Power supply Download PDF

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JP6090103B2
JP6090103B2 JP2013217280A JP2013217280A JP6090103B2 JP 6090103 B2 JP6090103 B2 JP 6090103B2 JP 2013217280 A JP2013217280 A JP 2013217280A JP 2013217280 A JP2013217280 A JP 2013217280A JP 6090103 B2 JP6090103 B2 JP 6090103B2
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power supply
battery module
monitoring
switch
battery
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JP2015080367A (en
JP2015080367A5 (en
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洋明 加藤
洋明 加藤
宏昌 吉澤
宏昌 吉澤
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Toyota Industries Corp
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Toyota Industries Corp
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Priority to PCT/JP2014/066583 priority patent/WO2015056468A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/005—Detection of state of health [SOH]

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medical Informatics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Description

本発明は、電池の複数のセルが直列接続され、各セルの異常監視機能を備えた電池モジュールを並列に接続した電源装置に関する。   The present invention relates to a power supply apparatus in which a plurality of cells of a battery are connected in series, and battery modules having an abnormality monitoring function of each cell are connected in parallel.

従来、複数のセルが直列接続され、各セルの異常監視機能を備えた電池モジュールを並列に接続した電源装置に関して、例えば、下記特許文献１〜３のような文献がある。
下記特許文献１には、複数のセルが直列接続された電池と、セルの異常を監視し、異常を検出した場合にスイッチオフ信号によりオフ状態となるスイッチと、を有する複数の電池ユニットが並列接続された電池システムが記載されている。又、下記特許文献２には、複数のセルが直列接続された組電池と、電池の異常を監視する電池監視手段とを有する電源装置が記載されている。更に、下記特許文献３には、複数のセルが直列接続された組電池と、複数の電池間の出力電圧の差によって生じる電流の逆流を防止する１つ以上の逆流防止ダイオードとを有する電源装置が記載されている。 Conventionally, for example, Patent Documents 1 to 3 listed below relate to a power supply device in which a plurality of cells are connected in series and battery modules having an abnormality monitoring function for each cell are connected in parallel.
In Patent Document 1 below, a plurality of battery units having a battery in which a plurality of cells are connected in series and a switch that monitors a cell abnormality and is turned off by a switch-off signal when the abnormality is detected are arranged in parallel. A connected battery system is described. Patent Document 2 below describes a power supply device having an assembled battery in which a plurality of cells are connected in series and battery monitoring means for monitoring battery abnormality. Further, Patent Document 3 below discloses a power supply device including an assembled battery in which a plurality of cells are connected in series, and one or more backflow prevention diodes that prevent a backflow of current caused by a difference in output voltage between the plurality of batteries. Is described.

特開２０１０−８８２０２号公報JP 2010-88202 A 特開２００４−１２０８５６号公報JP 2004-120856 A 特開２０１１−２０５８６６号公報JP 2011-205866 A

しかしながら、特許文献１の電源装置では、スイッチオフ信号によりオフ状態となるスイッチが電池の正の端子側に配置されているため、スイッチを電界効果トランジスタ等で構成する場合に制御電圧を高い電圧にする必要がある。低い制御電圧で電界効果トランジスタ等のスイッチを制御するためには、スイッチを電池の負の端子側に配置する必要があるが、電池の負の端子側を共通グランドにすると、オン状態のスイッチに接続された電池から、オフ状態のスイッチに接続された電池に電流が回り込み、並列接続された電池を独立にオン/オフ制御できない。   However, in the power supply device of Patent Document 1, since the switch that is turned off by the switch-off signal is arranged on the positive terminal side of the battery, the control voltage is set to a high voltage when the switch is configured by a field effect transistor or the like. There is a need to. In order to control a switch such as a field effect transistor with a low control voltage, it is necessary to place the switch on the negative terminal side of the battery. However, if the negative terminal side of the battery is connected to a common ground, the switch is turned on. The current flows from the connected battery to the battery connected to the switch in the off state, and the on / off control of the batteries connected in parallel cannot be performed independently.

又、特許文献２の電源装置は、劣化判定対象の組電池と劣化判定対象外の組電池とを分けて充放電試験を行うことができるが、異常が検出された組電池を切り離す機能を有していない。更に、特許文献３の電源装置は、各電池の異常を検出し、異常が検出された組電池を切り離す機能を有していない。   In addition, the power supply device of Patent Document 2 can perform a charge / discharge test separately for an assembled battery that is subject to deterioration determination and an assembled battery that is not subject to deterioration determination, but has a function of disconnecting the assembled battery in which an abnormality is detected. Not done. Furthermore, the power supply device of Patent Document 3 does not have a function of detecting an abnormality of each battery and disconnecting the assembled battery in which the abnormality is detected.

本発明は、複数のセルが直列接続され、各セルの異常監視機能を備えた複数の電池モジュールを並列に接続した電源装置において、複数の電池モジュールを低い電圧で独立にオン/オフ制御できる電源装置を提供することを課題とする。   The present invention relates to a power supply device in which a plurality of cells are connected in series, and a plurality of battery modules having an abnormality monitoring function for each cell are connected in parallel, and the power supply capable of independently controlling on / off of the plurality of battery modules at a low voltage It is an object to provide an apparatus.

本発明の電源装置は、複数のセルが直列接続された電池モジュールと、前記電池モジュールから電力供給を受けて前記電池モジュールの異常を監視する監視手段と、前記監視手段のグランド端子とアノードが接続され、前記電池モジュールの負の端子とカソードが接続されたダイオードと、一端が前記電池モジュールの負の端子と前記ダイオードのカソードとの接続点に接続され、前記監視手段によりオン/オフ制御されるスイッチ手段と、を有する複数の電源ユニットが、各々の前記電池モジュールの正の端子が共通接続され、かつ各々の前記スイッチ手段の他端が共通接続され、かつ各々の前記監視手段の前記グランド端子が共通接続されていることを特徴とする。   The power supply device of the present invention includes a battery module in which a plurality of cells are connected in series, a monitoring unit that receives power supply from the battery module and monitors an abnormality of the battery module, and a ground terminal and an anode of the monitoring unit are connected A diode connected to the negative terminal of the battery module and the cathode, and one end connected to a connection point between the negative terminal of the battery module and the cathode of the diode, and is on / off controlled by the monitoring means. A plurality of power supply units having a positive terminal of each of the battery modules and a common connection of the other end of each of the switch means, and the ground terminal of each of the monitoring means. Are commonly connected.

本発明によれば、各電源ユニットが、監視手段のグランド端子とアノードが接続され、電池モジュールの負の端子とカソードが接続されたダイオードを有している。このダイオードにより、オン状態のスイッチに接続された電池から、オフ状態のスイッチに接続された電池への電流の回り込みを防止し、各電源ユニットのスイッチ手段を独立にオン/オフ制御することができる。   According to the present invention, each power supply unit has a diode in which the ground terminal and the anode of the monitoring means are connected and the negative terminal and the cathode of the battery module are connected. This diode prevents the current from flowing from the battery connected to the switch in the on state to the battery connected to the switch in the off state, and the switch means of each power supply unit can be controlled on / off independently. .

本発明の第１実施形態の電力供給システムの概略を示すブロック図The block diagram which shows the outline of the electric power supply system of 1st Embodiment of this invention. 比較例の電源装置２０の要部の回路図Circuit diagram of essential parts of power supply device 20 of comparative example 図２の電源装置２０における電流回り込みを説明する図The figure explaining the current wraparound in the power supply device 20 of FIG. 本発明の第１実施形態の電源装置１０の要部の回路図The circuit diagram of the principal part of the power supply device 10 of 1st Embodiment of this invention. 図４の電源装置１０の動作を説明する図The figure explaining operation | movement of the power supply device 10 of FIG. 本発明の第２実施形態の電源装置１０Ａの要部の回路図The circuit diagram of the principal part of 10 A of power supply devices of 2nd Embodiment of this invention. 図６の電源装置１０Ａの動作を説明する図The figure explaining operation | movement of 10 A of power supply devices of FIG.

以下、本発明の実施形態について図面を参照しながら説明する。
（第１実施形態）
図１は、本発明の第１実施形態の電力供給システムの概略を示すブロック図である。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing an outline of the power supply system according to the first embodiment of the present invention.

図１の電力供給システムは、電源装置１０と、負荷Ｚとを有し、電源装置１０から負荷Zへ電流Ｉｔが供給されている。負荷Ｚから電源装置１０へは、負荷の状態を示す信号が出力されている。   The power supply system of FIG. 1 includes a power supply device 10 and a load Z, and a current It is supplied from the power supply device 10 to the load Z. A signal indicating the state of the load is output from the load Z to the power supply device 10.

図２は、比較例の電源装置２０の回路図であり、図３は、図２の電源装置２０における電流の回り込みを説明する図である。
図２の電源装置２０は、複数のセルが直列接続された複数の電池モジュール１−１，１−２を有している。電池モジュール１から電力供給を受けて電池モジュール１の電圧、電流、温度の少なくとも１つの異常を監視する監視手段としての監視電子制御ユニット（Electronic Control Unite、以下「ＥＣＵ」という。）２（２−１，２−２）を有している。更に、一端が電池モジュール１の負の端子に接続され、監視ＥＣＵ２が出力する制御信号によりオン/オフ制御されるスイッチ手段３（３−１，３−２）を有している。スイッチ手段３は、例えば、電界効果トランジスタ（ＦＥＴ）等により構成される。電池モジュール１と、監視ＥＣＵ２と、スイッチ手段３と、により電源ユニットが構成されている。 FIG. 2 is a circuit diagram of the power supply device 20 of the comparative example, and FIG. 3 is a diagram for explaining current wraparound in the power supply device 20 of FIG.
The power supply device 20 in FIG. 2 includes a plurality of battery modules 1-1 and 1-2 in which a plurality of cells are connected in series. A monitoring electronic control unit (hereinafter referred to as “ECU”) 2 (2-) as monitoring means for receiving power supply from the battery module 1 and monitoring at least one abnormality in voltage, current, and temperature of the battery module 1 1, 2-2). Furthermore, one end is connected to the negative terminal of the battery module 1 and has switch means 3 (3-1, 3-2) that is on / off controlled by a control signal output from the monitoring ECU 2. The switch means 3 is composed of, for example, a field effect transistor (FET). The battery module 1, the monitoring ECU 2, and the switch means 3 constitute a power supply unit.

電源装置２０は、複数の電源ユニットの、各々の電池モジュール１の正の端子が共通接続され、かつ各々のスイッチ手段３の他端が共通接続され、かつ各々の監視ＥＣＵ２のグランド端子がスイッチ手段３の一端と共通接続されて、構成されている。各々の監視ＥＣＵ２のグランド端子が共通接続されているのは、各々の監視ＥＣＵ２同士が相互に通信を行うためである。電源装置２０は、監視ＥＣＵ２から出力される低電圧のオン/オフ信号によりスイッチ手段３（３−１，３−２）を独立に制御することを意図した回路である。   In the power supply device 20, the positive terminals of the battery modules 1 of a plurality of power supply units are commonly connected, the other ends of the switch means 3 are commonly connected, and the ground terminals of the monitoring ECUs 2 are switch means. 3 is connected in common with one end. The reason why the ground terminals of the monitoring ECUs 2 are connected in common is that the monitoring ECUs 2 communicate with each other. The power supply device 20 is a circuit intended to control the switch means 3 (3-1, 3-2) independently by a low voltage on / off signal output from the monitoring ECU 2.

図３において、スイッチ３−１はオフ状態であり、スイッチ３−２はオン状態である。この場合、オン状態のスイッチ３−２に接続された電池モジュール１−２から負荷Ｚに電力が供給される。しかし、監視ＥＣＵ２−１及び２−２のグランド端子が共通に接続されているため、オフ状態のスイッチ３−１に接続された電池モジュール１−１にも、一点鎖線の矢印で示した経路で電流が回り込む。そのため、各々のスイッチ手段３−１，３−２を独立にオン/オフ制御することができない。   In FIG. 3, the switch 3-1 is in an off state and the switch 3-2 is in an on state. In this case, power is supplied to the load Z from the battery module 1-2 connected to the ON switch 3-2. However, since the ground terminals of the monitoring ECUs 2-1 and 2-2 are connected in common, the battery module 1-1 connected to the switch 3-1 in the off state also has a route indicated by a dashed line arrow. Current wraps around. For this reason, it is not possible to independently turn on / off each of the switch means 3-1, 3-2.

図３では、スイッチ３−１はオフ状態であり、スイッチ３−２はオン状態であるとして説明したが、スイッチ３−１がオン状態であり、スイッチ３−２がオフ状態であって良い。この場合には、オン状態のスイッチ３−１に接続された電池モジュール１−１から負荷Ｚへ流れる電流の一部が、オフ状態のスイッチ３−２に接続された電池モジュール１−２へ回り込み、各々のスイッチ手段３−１，３−２を独立にオン/オフ制御することができない。   In FIG. 3, the switch 3-1 is in the off state and the switch 3-2 is in the on state. However, the switch 3-1 may be in the on state and the switch 3-2 may be in the off state. In this case, part of the current flowing from the battery module 1-1 connected to the switch 3-1 in the on state to the load Z wraps around the battery module 1-2 connected to the switch 3-2 in the off state. The switch means 3-1 and 3-2 cannot be turned on / off independently.

尚、図２，図３では、説明の都合上、電源装置２０は、２つの電源ユニットが並列接続された構成を例に説明したが、並列接続される電源ユニットの数は２つに限定されず、任意の数の電源ユニットを並列接続した電源装置について、同様の電流の回り込みが発生する。   2 and 3, for convenience of explanation, the power supply device 20 has been described by taking an example of a configuration in which two power supply units are connected in parallel. However, the number of power supply units connected in parallel is limited to two. However, a similar current sneak occurs in a power supply device in which an arbitrary number of power supply units are connected in parallel.

そこで、各々のスイッチ手段３−１，３−２を独立にオン/オフ制御できる本発明の第１実施形態の電源装置１０を発明した。
図４は、本発明の第１実施形態の電源装置１０の要部の回路図であり、図５は、図４の電源装置１０の動作を説明する図である。 In view of this, the power supply device 10 according to the first embodiment of the present invention in which each switch means 3-1 and 3-2 can be independently turned on / off has been invented.
FIG. 4 is a circuit diagram of a main part of the power supply apparatus 10 according to the first embodiment of the present invention, and FIG. 5 is a diagram for explaining the operation of the power supply apparatus 10 of FIG.

図４において、電源装置１０は、複数のセルが直列接続された電池モジュール１と、電池モジュール１から電力供給を受けて電池モジュール１の電圧、電流、温度の少なくとも１つの異常を監視する監視手段としての監視ＥＣＵ２（２−１，２−２）と、監視ＥＣＵ２のグランド端子とアノードが接続され、電池モジュール１の負の端子とカソードが接続されたダイオード４（４−１，４−２）と、一端が電池モジュール１の負の端子とダイオード４のカソードとの接続点に接続され、監視ＥＣＵ２によりオン/オフ制御されるスイッチ手段３（３−１，３−２）と、を有する複数の電源ユニットが、複数の電源ユニットの各々の電池モジュール１の正の端子が共通接続され、かつ複数の電源ユニットの各々のスイッチ手段３の他端が共通接続され、かつ複数の電源ユニットの各々の監視ＥＣＵ２のグランド端子が共通接続されている。   In FIG. 4, the power supply device 10 includes a battery module 1 in which a plurality of cells are connected in series, and monitoring means that receives power supply from the battery module 1 and monitors at least one abnormality in the voltage, current, and temperature of the battery module 1. Monitoring ECU 2 (2-1, 2-2), and diode 4 (4-1, 4-2) in which the ground terminal and anode of monitoring ECU 2 are connected and the negative terminal and cathode of battery module 1 are connected. And switch means 3 (3-1, 3-2), one end of which is connected to a connection point between the negative terminal of the battery module 1 and the cathode of the diode 4 and is on / off controlled by the monitoring ECU 2. In the power supply unit, the positive terminals of the battery modules 1 of the plurality of power supply units are commonly connected, and the other ends of the switch means 3 of the plurality of power supply units are commonly connected. The ground terminals of the monitoring ECUs 2 of the plurality of power supply units are connected in common.

監視ＥＣＵ２は、電源供給端子が電池モジュール１の正の端子に接続され、グランド端子がダイオード４を介して電池モジュール１の負の端子に接続され、電池モジュール１から電力供給を受けて電池モジュール１の異常を監視すると共に、負荷Ｚが必要とする電力量の状態に応じて、異常でない電池モジュールを接続するスイッチ手段３をオン状態にするオン/オフ信号を出力する。更に、各監視ＥＣＵ２同士で通信を行うため、各監視ＥＣＵ２のグランド端子は、共通接続されている。   The monitoring ECU 2 has a power supply terminal connected to the positive terminal of the battery module 1, a ground terminal connected to the negative terminal of the battery module 1 via the diode 4, receives power supply from the battery module 1, and receives the battery module 1. And an on / off signal for turning on the switch means 3 for connecting a battery module that is not abnormal is output according to the state of the amount of power required by the load Z. Furthermore, in order to communicate between each monitoring ECU2, the ground terminal of each monitoring ECU2 is connected in common.

次に、図５に基づいて、第１実施形態の電源装置１０の回路の動作について説明する。
図５において、図３と同様に、スイッチ３−１はオフ状態であり、スイッチ３−２はオン状態である。この場合、オン状態のスイッチ３−２に接続された電池モジュール１−２から負荷Ｚに電力が供給される。 Next, the operation of the circuit of the power supply device 10 according to the first embodiment will be described with reference to FIG.
In FIG. 5, as in FIG. 3, the switch 3-1 is in the off state and the switch 3-2 is in the on state. In this case, power is supplied to the load Z from the battery module 1-2 connected to the ON switch 3-2.

この場合、図３と異なり、監視ＥＣＵ２−１のグランド端子にダイオード４−１のアノードが接続され、ダイオード４−１のカソードが電池モジュール１の負の端子に接続されているため、オフ状態のスイッチ３−１に接続された電池モジュール１−１には、電流が回り込まない。そのため、各々のスイッチ手段３−１，３−２を独立にオン/オフ制御することができる。   In this case, unlike FIG. 3, the anode of the diode 4-1 is connected to the ground terminal of the monitoring ECU 2-1, and the cathode of the diode 4-1 is connected to the negative terminal of the battery module 1. No current flows into the battery module 1-1 connected to the switch 3-1. Therefore, each switch means 3-1, 3-2 can be controlled on / off independently.

図４に示された第１実施形態の電源装置１０の構成によれば、各電源ユニットが、監視ＥＣＵ２のグランド端子とアノードが接続され、電池モジュール１の負の端子とカソードが接続されたダイオードを有している。このダイオードにより、オン状態のスイッチ３−２に接続された電池モジュール１−２から、オフ状態のスイッチ３−１に接続された電池モジュール１−１へ電流が回り込むのを防止でき、各電源ユニットのスイッチ手段３を独立にオン/オフ制御することができる。
（第２実施形態）
図６は、本発明の第２実施形態の電源装置１０Ａの要部の回路図であり、比較例の電源装置２０を示す図２、及び第１実施形態の電源装置１０を示す図４と共通の要素には共通の符号が付されている。 According to the configuration of the power supply device 10 of the first embodiment shown in FIG. 4, each power supply unit is a diode in which the ground terminal and the anode of the monitoring ECU 2 are connected, and the negative terminal and the cathode of the battery module 1 are connected. have. This diode can prevent the current from flowing from the battery module 1-2 connected to the switch 3-2 in the on state to the battery module 1-1 connected to the switch 3-1 in the off state. The switch means 3 can be independently turned on / off.
(Second Embodiment)
FIG. 6 is a circuit diagram of a main part of the power supply device 10A according to the second embodiment of the present invention, which is common to FIG. 2 showing the power supply device 20 of the comparative example and FIG. 4 showing the power supply device 10 of the first embodiment. These elements are denoted by common reference numerals.

電源装置１０Ａは、図４に示された電源装置１０と同様の電池モジュール１（１−１，１−２）、監視ＥＣＵ２（２−１，２−２）、スイッチ手段３（３−１，３−２）、及びダイオード４（４−１，４−２）を有し、新たに、監視ＥＣＵ２（２−１，２−２）を監視制御する監視制御手段としての制御ＥＣＵ５が追加されている。制御ＥＣＵ５は、電源端子が電池モジュール１の正の端子に接続され、電池モジュール１から電力供給を受けて監視ＥＣＵ２と制御信号の送受信を行うと共に、監視ＥＣＵ２へ電力供給を行うものである。制御ＥＣＵ５は、グランド端子が複数の電源ユニットの各々のダイオード４のアノードに共通接続され、ダイオード４を介して各々の電池モジュール１の負の端子に接続され、制御ＥＣＵ５のグランド端子と、監視ＥＣＵ２−１，２−２のグランド端子を共通にしている。
更に、制御ＥＣＵ５は、図示しない上位の制御手段からの命令に従って制御されても良い。尚、監視ＥＣＵ２への電力供給は、制御ＥＣＵ５を介して電力供給を行っても、電池モジュール１から監視ＥＣＵ２へ直接電力供給を行っても良い。 The power supply device 10A includes the same battery module 1 (1-1, 1-2), monitoring ECU 2 (2-1, 2-2), and switch means 3 (3-1, 3) as the power supply device 10 shown in FIG. 3-2) and a diode 4 (4-1, 4-2), and a control ECU 5 is newly added as monitoring control means for monitoring and controlling the monitoring ECU 2 (2-1, 2-2). Yes. The control ECU 5 has a power terminal connected to the positive terminal of the battery module 1, receives power from the battery module 1, transmits and receives control signals to and from the monitoring ECU 2, and supplies power to the monitoring ECU 2. The control ECU 5 has a ground terminal commonly connected to the anode of each diode 4 of the plurality of power supply units, and is connected to the negative terminal of each battery module 1 via the diode 4. The control ECU 5 and the monitoring ECU 2 The ground terminals −1 and 2-2 are shared.
Further, the control ECU 5 may be controlled in accordance with a command from a host control means (not shown). The power supply to the monitoring ECU 2 may be performed through the control ECU 5 or directly from the battery module 1 to the monitoring ECU 2.

図７は、図６の電源装置１０Ａの動作を説明する図である。
図７において、電池モジュール１−１，１−２の正の端子から制御ＥＣＵの電源端子へ供給された電流は、スイッチ手段３−１，３−２のオン/オフ状態に関係なく、ダイオード４−１，４−２を介して電池モジュール１−１，１−２の負の端子へ還流している。 FIG. 7 is a diagram for explaining the operation of the power supply apparatus 10A of FIG.
In FIG. 7, the current supplied from the positive terminals of the battery modules 1-1 and 1-2 to the power supply terminal of the control ECU is independent of the on / off state of the switch means 3-1 and 3-2. It circulates to the negative terminal of battery module 1-1, 1-2 via -1,4-2.

これにより、制御ＥＣＵ５が消費する電力を、並列接続された電池モジュール１−１，１−２から均等に使用することができる。そのため、もし、電池モジュール１−１と１−２との端子間電圧がばらついた場合には、端子間電圧が高い方の電池モジュール１−１又は１−２を使用することができる。   Thereby, the electric power which control ECU5 consumes can be used equally from the battery modules 1-1 and 1-2 connected in parallel. Therefore, if the voltage between the terminals of the battery modules 1-1 and 1-2 varies, the battery module 1-1 or 1-2 with the higher voltage between the terminals can be used.

１，１−１，１−２ 電池モジュール
２，２−１，２−２ 監視ＥＣＵ
３，３−１，３−２ スイッチ手段
４，４−１，４−２ ダイオード
５ 制御ＥＣＵ
１０，１０Ａ，２０ 電源装置
Ｚ 負荷 1,1-1,1-2 Battery module 2,2-1,2-2 Monitoring ECU
3,3-1,3-2 switch means 4,4-1,4-2 diode 5 control ECU
10, 10A, 20 Power supply Z load

Claims (3)

複数のセルが直列接続された電池モジュールと、
前記電池モジュールから電力供給を受けて前記電池モジュールの異常を監視する監視手段と、
前記監視手段のグランド端子とアノードが接続され、前記電池モジュールの負の端子とカソードが接続されたダイオードと、
一端が前記電池モジュールの負の端子と前記ダイオードのカソードとの接続点に接続され、前記監視手段によりオン/オフ制御されるスイッチ手段と、
を有する複数の電源ユニットを備え、
前記複数の電源ユニットにおいて、
各々の前記電池モジュールの正の端子が共通接続され、かつ各々の前記スイッチ手段の他端が共通接続され、かつ各々の前記監視手段の前記グランド端子が共通接続され、
前記ダイオードは、オン状態の前記スイッチ手段に接続された電池モジュールからオフ状態の前記スイッチ手段に接続された電池モジュールへ電流が回り込むのを防止することを特徴とする電源装置。 A battery module in which a plurality of cells are connected in series;
Monitoring means for monitoring the abnormality of the battery module by receiving power supply from the battery module;
A diode in which a ground terminal and an anode of the monitoring means are connected, and a negative terminal and a cathode of the battery module are connected;
One end is connected to a connection point between the negative terminal of the battery module and the cathode of the diode, and switch means that is on / off controlled by the monitoring means;
A plurality of power supply units having
In the plurality of power supply units,
The positive terminals of the battery modules are commonly connected, the other ends of the switch means are commonly connected, and the ground terminals of the monitoring means are commonly connected ,
The diode, power supply characterized that you prevented from battery module connected to said switch means in the on state of the current from flowing to the switch means connected to the battery module in the off state. 前記電池モジュールの正の端子から前記監視手段の電力供給端子へ電力が供給されることを特徴とする請求項１に記載の電源装置。   The power supply apparatus according to claim 1, wherein power is supplied from a positive terminal of the battery module to a power supply terminal of the monitoring unit. 前記複数の電源ユニット内の各々の前記監視手段を監視制御する監視制御手段を有し、
前記監視制御手段は、
前記電池モジュールの正の端子からへ電力供給を受け、前記監視制御手段のグランド端子は前記複数の電源ユニットの各々の前記ダイオードにおける各アノードに共通接続されていることを特徴とする請求項１に記載の電源装置。 Monitoring control means for monitoring and controlling each of the monitoring means in the plurality of power supply units,
The monitoring control means includes
The power supply is received from the positive terminal of the battery module, and the ground terminal of the monitoring control unit is commonly connected to each anode of the diode of each of the plurality of power supply units. The power supply described.
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