JP7087751B2 - Battery monitoring device - Google Patents

Battery monitoring device Download PDF

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JP7087751B2
JP7087751B2 JP2018131753A JP2018131753A JP7087751B2 JP 7087751 B2 JP7087751 B2 JP 7087751B2 JP 2018131753 A JP2018131753 A JP 2018131753A JP 2018131753 A JP2018131753 A JP 2018131753A JP 7087751 B2 JP7087751 B2 JP 7087751B2
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JP2020010562A (en
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真志 出利葉
高志 稲本
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Denso Corp
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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
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    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Description

複数の電池セルを直列接続して構成される組電池を監視する電池監視装置に関する。 The present invention relates to a battery monitoring device that monitors an assembled battery configured by connecting a plurality of battery cells in series.

組電池を監視する電池監視装置として、特許文献１に開示されたものが知られている。この電池監視装置は、組電池を構成する各電池セルの両端のそれぞれに接続線により接続されており、各接続線を通じて電池セルのセル電圧を検出する。電池監視装置は、検出したセル電圧に基づいて、各電池セルの状態等を監視している。 As a battery monitoring device for monitoring an assembled battery, the one disclosed in Patent Document 1 is known. This battery monitoring device is connected to each of both ends of each battery cell constituting the assembled battery by a connection line, and detects the cell voltage of the battery cell through each connection line. The battery monitoring device monitors the state of each battery cell and the like based on the detected cell voltage.

また、各接続線を接続する配線に、ノイズ除去用のコンデンサを設けた構成が知られている。具体的には、電池監視装置の各接続線をバイパスする配線上に、コンデンサが設けられている。 Further, it is known that the wiring connecting each connection line is provided with a capacitor for noise removal. Specifically, a capacitor is provided on the wiring that bypasses each connection line of the battery monitoring device.

特許第５５８５６１６号公報Japanese Patent No. 5585616

電池監視装置が、ノイズ除去用のコンデンサを備えることにより、電池監視装置を、コネクタを介して組電池に接続する際に、接続線に突入電流が流れる場合がある。また、突入電流に起因して、接続線に高電圧が生じる場合があり、電池監視装置を劣化させる要因となる。このとき、コネクタが接続される際には、任意の順序で各接続線が導通されると考えられる。そこで、このような突入電流を抑制することを目的に、全ての接続線に抵抗素子を設けることが考えられる。しかし、全ての接続線に抵抗素子を設けることにより、接続線の抵抗値が大きくなり、接続線に流れる電流量が過剰に抑制されることが懸念される。例えば、接続線にヒューズを設ける場合では、そのヒューズが適正に機能しなくなることが懸念される。また、接続線に追加した抵抗素子の分だけ電池監視装置を構成する基板の体格が増大してしまうことも懸念される。 Since the battery monitoring device includes a capacitor for removing noise, an inrush current may flow in the connection line when the battery monitoring device is connected to the assembled battery via the connector. In addition, a high voltage may be generated in the connection line due to the inrush current, which causes deterioration of the battery monitoring device. At this time, when the connectors are connected, it is considered that the connection lines are conducted in any order. Therefore, for the purpose of suppressing such inrush current, it is conceivable to provide resistance elements in all the connection lines. However, by providing resistance elements in all the connecting lines, there is a concern that the resistance value of the connecting lines will increase and the amount of current flowing through the connecting lines will be excessively suppressed. For example, when a fuse is provided in the connection line, there is a concern that the fuse may not function properly. In addition, there is a concern that the physique of the substrate constituting the battery monitoring device will increase by the amount of the resistance element added to the connection line.

本発明は、上記課題に鑑みたものであり、電池監視装置を組電池に接続する際に生じる突入電流を好適に抑制することができる電池監視装置を提供することを目的とする。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a battery monitoring device capable of suitably suppressing an inrush current generated when a battery monitoring device is connected to an assembled battery.

上記課題を解決するために第１の発明では、複数の電池セルを直列接続して構成された電池セル接続体に適用され、コネクタにより前記各電池セルの両端のそれぞれに接続線が接続され、前記接続線により前記電池セル毎のセル電圧を検出する電池監視装置に関する。電池監視装置は、前記各電池セルにおける正極側及び負極側の前記各接続線を接続する第１バイパス線に設けられた第１コンデンサと、前記電池セル接続体においてその正極端子に接続される前記接続線である正極接続線と、負極端子に接続される前記接続線である負極接続線とを接続する経路である第２バイパス線に設けられた第２コンデンサと、前記正極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である高電位側経路と、前記負極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である低電位側経路と、前記第２バイパス線との少なくともいずれかに設けられた抵抗素子と、を備える。 In order to solve the above problems, the first invention is applied to a battery cell connection body configured by connecting a plurality of battery cells in series, and a connection line is connected to each of both ends of the battery cells by a connector. The present invention relates to a battery monitoring device that detects a cell voltage for each battery cell by the connection line. The battery monitoring device is connected to a first capacitor provided on a first bypass line connecting the positive electrode side and the negative electrode side of each battery cell, and to the positive electrode terminal of the battery cell connector. The second capacitor provided in the second bypass line, which is a path connecting the positive electrode connection line which is a connection line and the negative electrode connection line which is the connection line connected to the negative electrode terminal, and the positive electrode connection line. The high potential side path, which is the path from the end on the connector side to the connection point with the second bypass line, and the negative electrode connection line from the end on the connector side to the connection point with the second bypass line. A low potential side path, which is a path, and a resistance element provided at at least one of the second bypass lines are provided.

上記構成では、電池セル毎の接続線間を接続する第１バイパス線上に第１コンデンサが設けられることにより、電池監視装置により検出される各セル電圧のノイズが抑制される。また、電池セル接続体において、正極接続線と負極接続線とを接続する第２バイパス線に第２コンデンサが設けられることにより、電池監視装置により検出される電池セル接続体の端子間電圧のノイズが抑制される。ここで、本発明者は、電池監視装置を、コネクタを介して電池セル接続体に接続する際に、各接続線の導通順序に応じて、第２コンデンサの端子間に印加される電圧が異なる値となり、ひいては突入電流の大きさが異なることに着目した。具体的には、正極接続線及び負極接続線が最初に導通することにより、正極接続線と負極接続線とを接続する第２バイパス線の第２コンデンサに電池セル接続体から最も大きな電圧が印加され、突入電流が最も大きくなる。 In the above configuration, the noise of each cell voltage detected by the battery monitoring device is suppressed by providing the first capacitor on the first bypass line connecting the connection lines of each battery cell. Further, in the battery cell connection body, noise of the voltage between terminals of the battery cell connection body detected by the battery monitoring device is provided by providing the second capacitor in the second bypass line connecting the positive electrode connection line and the negative electrode connection line. Is suppressed. Here, the present inventor has different voltage applied between the terminals of the second capacitor when the battery monitoring device is connected to the battery cell connection body via the connector according to the conduction order of each connection line. We paid attention to the value, and by extension, the magnitude of the inrush current was different. Specifically, when the positive electrode connection line and the negative electrode connection line are first conducted, the largest voltage is applied from the battery cell connector to the second capacitor of the second bypass line connecting the positive electrode connection line and the negative electrode connection line. And the inrush current is the largest.

そこで、電池監視装置において正極接続線のうちコネクタ側の端部から第２バイパス線との接続点までの経路である高電位側経路と、負極接続線のうちコネクタ側の端部から第２バイパス線との接続点までの経路である低電位側経路と、第２バイパス線とのいずれかに抵抗素子を設ける構成とした。この場合、電池監視装置をコネクタにより電池セル接続体に接続する際に、最も大きな電圧が第２コンデンサに印加される場合でも、抵抗素子の電圧降下により第２コンデンサに印加される電圧が抑制され、突入電流の最大値を抑制することができる。また、高電位側経路と、低電位側経路と、第２バイパス線との少なくともいずれかにのみ抵抗素子を設けているため、全ての接続線に抵抗素子を設ける構成よりも、電池監視装置を構成する基板の体格の増大を抑制できる。その結果、電池監視装置を組電池に接続する際に生じる突入電流を好適に抑制することができる。 Therefore, in the battery monitoring device, the high potential side path, which is the path from the end of the positive electrode connection line on the connector side to the connection point with the second bypass line, and the second bypass from the end of the negative electrode connection line on the connector side. A resistance element is provided in either the low potential side path, which is the path to the connection point with the wire, or the second bypass wire. In this case, even when the largest voltage is applied to the second capacitor when the battery monitoring device is connected to the battery cell connector by the connector, the voltage applied to the second capacitor is suppressed by the voltage drop of the resistance element. , The maximum value of the inrush current can be suppressed. Further, since the resistance element is provided only in at least one of the high potential side path, the low potential side path, and the second bypass line, the battery monitoring device is more suitable than the configuration in which the resistance element is provided in all the connection lines. It is possible to suppress an increase in the physique of the constituent substrate. As a result, the inrush current generated when the battery monitoring device is connected to the assembled battery can be suitably suppressed.

第２の発明では、前記抵抗素子は、前記高電位側経路及び低電位側経路の少なくともいずれかに設けられている。 In the second invention, the resistance element is provided in at least one of the high potential side path and the low potential side path.

抵抗素子を第２バイパス線に設けることにより抵抗素子と第２コンデンサとの直列回路が形成されると、抵抗素子の抵抗成分により、第２コンデンサのフィルタ性能が所望とする値とならない場合がある。この点、上記構成では、抵抗素子は高電位側経路及び低電位側経路の少なくともいずれかに設けられている。この場合、抵抗素子と第２コンデンサとにより直列回路が形成されることが防止されるため、第２コンデンサを適正に機能させることができる。 When a series circuit of the resistance element and the second capacitor is formed by providing the resistance element on the second bypass wire, the filter performance of the second capacitor may not be the desired value due to the resistance component of the resistance element. .. In this respect, in the above configuration, the resistance element is provided in at least one of the high potential side path and the low potential side path. In this case, since the series circuit is prevented from being formed by the resistance element and the second capacitor, the second capacitor can function properly.

第３の発明では、前記第２バイパス線は、前記正極接続線において前記第１バイパス線との接続点よりも前記コネクタ側の位置と、前記負極接続線において前記第１バイパス線との接続点よりも前記コネクタ側の位置との間に接続されており、前記抵抗素子である主抵抗素子に加えて、前記正極接続線において前記第１バイパス線との接続点と前記第２バイパス線との接続点との間の位置、及び前記負極接続線において、前記第１バイパス線との接続点と前記第２バイパス線との接続点との間の位置の少なくともいずれかに設けられた副抵抗素子を備える。 In the third invention, the second bypass line is a position on the connector side of the positive electrode connection line with respect to the connection point with the first bypass line, and a connection point with the first bypass line in the negative electrode connection line. In addition to the main resistance element, which is the resistance element, the connection point with the first bypass line and the second bypass line in the positive electrode connection line are connected to the position on the connector side. An auxiliary resistance element provided at least one of the positions between the connection point and the negative electrode connection line between the connection point with the first bypass line and the connection point with the second bypass line. To prepare for.

上記構成の電池監視装置では、コネクタにより電池監視装置が電池セル接続体に接続される際に、電池セル接続体を構成する最も高電位の電池セルにおいて負極側に接続された接続線が最初に導通する場合がある。この場合、突入電流が、主抵抗素子を経由することなく接続線を流れる場合がある。具体的には、正極接続線において、第１バイパス線との接続点と第２バイパス線との接続点との間の位置、又は負極接続線において第１バイパス線との接続点と第２バイパス線との接続点との間の位置を経由して、突入電流が流れることが懸念される。例えば、電池セル接続体のうち、最も高電位の電池セルを除く他の電池セルからの電圧が第２バイパス線上の第２コンデンサに印加される場合、接続線には、最も大きな突入電流ではないが、次に大きな突入電流が流れる。そこで、正極接続線において第１バイパス線との接続点と第２バイパス線との接続点との間の位置、及び負極接続線において第１バイパス線との接続点と第２バイパス線との接続点との間の位置の少なくともいずれかに副抵抗素子が設けられている。この場合、各接続線のインピーダンスがばらつくことにより、電池監視装置を、コネクタを介して電池セル接続体に接続する毎に、突入電流が流れる経路が異なる場合でも、突入電流を好適に抑制することができる。 In the battery monitoring device having the above configuration, when the battery monitoring device is connected to the battery cell connection body by the connector, the connection line connected to the negative electrode side in the highest potential battery cell constituting the battery cell connection body is first. It may be conductive. In this case, the inrush current may flow through the connection line without passing through the main resistance element. Specifically, in the positive electrode connection line, the position between the connection point with the first bypass line and the connection point with the second bypass line, or in the negative electrode connection line, the connection point with the first bypass line and the second bypass. There is concern that an inrush current will flow through the position between the wire and the connection point. For example, when a voltage from a battery cell connector other than the battery cell having the highest potential is applied to the second capacitor on the second bypass line, the connection line does not have the largest inrush current. However, the next largest inrush current flows. Therefore, the position between the connection point with the first bypass line and the connection point with the second bypass line on the positive electrode connection line, and the connection between the connection point with the first bypass line and the second bypass line on the negative electrode connection line. An auxiliary resistance element is provided at at least one of the positions between the points. In this case, the impedance of each connection line varies, so that the inrush current is suitably suppressed even if the path through which the inrush current flows is different each time the battery monitoring device is connected to the battery cell connector via the connector. Can be done.

第４の発明では、前記主抵抗素子及び前記副抵抗素子は、前記高電位側経路及び前記低電位側経路のうち、前記高電位側経路に設けられている。 In the fourth invention, the main resistance element and the sub-resistance element are provided in the high potential side path among the high potential side path and the low potential side path.

主抵抗素子と副抵抗素子とを、負極接続線に設けることにより、負極接続線の抵抗値が大きくなり、電池監視装置の負極接続線の電圧が意図した値とならない場合がある。この場合、負極接続線の電圧を基準電圧とすることにより検出されるセル電圧の値が適正に検出できないことが懸念される。そこで、本実施形態では、主抵抗素子及び副抵抗素子は、高電位側経路及び低電位側経路のうち、高電位側経路に設けられている。この場合、負極接続線の電圧が不安定になるのが防止され、セル電位を適正に検出することができる。 By providing the main resistance element and the sub-resistance element in the negative electrode connection line, the resistance value of the negative electrode connection line becomes large, and the voltage of the negative electrode connection line of the battery monitoring device may not be the intended value. In this case, there is a concern that the value of the cell voltage detected by using the voltage of the negative electrode connection line as the reference voltage cannot be properly detected. Therefore, in the present embodiment, the main resistance element and the sub-resistance element are provided in the high potential side path among the high potential side path and the low potential side path. In this case, the voltage of the negative electrode connection line is prevented from becoming unstable, and the cell potential can be detected appropriately.

第５の発明では、前記第２バイパス線は、前記正極接続線において前記第１バイパス線との接続点よりも前記コネクタ側と反対側の位置と、前記負極接続線において前記第１コンデンサとの接続点よりも前記コネクタ側と反対側の位置との間に接続されており、前記抵抗素子は、前記高電位側経路上に設けられた第１抵抗素子と、前記低電位側経路上に設けられた第２抵抗素子と備える。 In the fifth invention, the second bypass line is located at a position opposite to the connector side of the connection point with the first bypass line in the positive electrode connection line, and with the first capacitor in the negative electrode connection line. It is connected between the connector side and the position opposite to the connection point, and the resistance element is provided on the first resistance element provided on the high potential side path and on the low potential side path. It is provided with the second resistance element.

本発明は、第５の発明のような具体的な構成とすることができる。 The present invention can have a specific configuration as in the fifth invention.

電源システムの構成図。Configuration diagram of the power supply system. 各接続線の導通状態を説明する図。The figure explaining the continuity state of each connection line. 各接続線の導通状態を説明する図。The figure explaining the continuity state of each connection line. 第２実施形態に係る電源システムの一部を説明する図。The figure explaining a part of the power-source system which concerns on 2nd Embodiment.

（第１実施形態）
以下、ハイブリッド自動車や電気自動車に搭載される電源システムの実施形態について図面を参照しつつ説明する。図１に示す電源システム１００は、組電池１０と、電池監視装置７０と、を備えている。 (First Embodiment)
Hereinafter, embodiments of a power supply system mounted on a hybrid vehicle or an electric vehicle will be described with reference to the drawings. The power supply system 100 shown in FIG. 1 includes an assembled battery 10 and a battery monitoring device 70.

組電池１０は、直列接続された複数個ずつの電池セル１２を１ブロックとし、各ブロックが直列接続されることで構成されている。図１の構成では、組電池１０は電池ブロック１１ａ，１１ｂ，１１ｃを有し、各電池ブロック１１ａ～１１ｃがワイヤ等により直列接続されている。例えば、組電池１０を構成する各電池セル１２はリチウムイオン二次電池により構成されている。本実施形態では、各電池ブロック１１ａ～１１ｃが電池セル接続体に相当する。 The assembled battery 10 is composed of a plurality of battery cells 12 connected in series as one block, and each block is connected in series. In the configuration of FIG. 1, the assembled battery 10 has battery blocks 11a, 11b, 11c, and the battery blocks 11a to 11c are connected in series by wires or the like. For example, each battery cell 12 constituting the assembled battery 10 is composed of a lithium ion secondary battery. In this embodiment, each battery block 11a to 11c corresponds to a battery cell connection body.

電池監視装置７０は、組電池１０を構成する各電池セル１２のセル電圧や、各電池ブロック１１ａ～１１ｃの端子間電圧を検出し、検出した電圧に基づいて電池セル１２や組電池１０の状態を監視する。電池監視装置７０は、コネクタ２０の各コネクタ端子を介して組電池１０に着脱可能に接続されている。 The battery monitoring device 70 detects the cell voltage of each battery cell 12 constituting the assembled battery 10 and the voltage between the terminals of the battery blocks 11a to 11c, and the state of the battery cell 12 and the assembled battery 10 based on the detected voltage. To monitor. The battery monitoring device 70 is detachably connected to the assembled battery 10 via each connector terminal of the connector 20.

電池監視装置７０は、回路保護部４０、電圧検出ＩＣ５０ａ，５０ｂ，５０ｃ、制御部５４、及び絶縁部５３を備えている。 The battery monitoring device 70 includes a circuit protection unit 40, voltage detection ICs 50a, 50b, 50c, a control unit 54, and an insulation unit 53.

電圧検出ＩＣ５０ａ～５０ｃは、組電池１０の電池ブロック１１ａ～１１ｃ毎に対応して複数設けられており、各電池ブロック１１ａ～１１ｃの端子間電圧や各電池セル１２のセル電圧を検出する。本実施形態では、電圧検出ＩＣ５０ａ，５０ｂ，５０ｃは、各電池セル１２の両端にそれぞれ接続された接続線３０を介して各電池セル１２に接続されている。各電池ブロック１１ａ～１１ｃにおける正極端子１３に接続された接続線３０を正極接続線３０ａと称し、負極端子１４に接続された接続線３０を負極接続線３０ｂと称する。本実施形態では、正極端子１３は、電池ブロック１１ａ～１１ｃにおいて、最も高電位の電池セル１２である高電位側セル１２ａの正極である。負極端子１４は、電池ブロック１１ａ～１１ｃにおいて、最も低電位の電池セル１２である低電位側セル１２ｂの負極である。 A plurality of voltage detection ICs 50a to 50c are provided for each of the battery blocks 11a to 11c of the assembled battery 10, and detect the voltage between the terminals of each battery block 11a to 11c and the cell voltage of each battery cell 12. In the present embodiment, the voltage detection ICs 50a, 50b, and 50c are connected to each battery cell 12 via connection lines 30 connected to both ends of each battery cell 12. The connection line 30 connected to the positive electrode terminal 13 in each of the battery blocks 11a to 11c is referred to as a positive electrode connection line 30a, and the connection line 30 connected to the negative electrode terminal 14 is referred to as a negative electrode connection line 30b. In the present embodiment, the positive electrode terminal 13 is the positive electrode of the high potential side cell 12a, which is the highest potential battery cell 12 in the battery blocks 11a to 11c. The negative electrode terminal 14 is the negative electrode of the low potential side cell 12b, which is the lowest potential battery cell 12 in the battery blocks 11a to 11c.

回路保護部４０は、電圧検出ＩＣ５０ａ～５０ｃを保護する回路であり、ヒューズ４１、およびツェナダイオード４２を備えている。ヒューズ４１は、各接続線３０に設けられており、所定電流値以上の電流が接続線３０に流れる場合に、オープン故障することにより各電池セル１２と電圧検出ＩＣ５０ａ～５０ｃとの電気的接続を遮断する。また、ツェナダイオード４２は、各接続線３０間に接続され、電圧検出ＩＣ５０ａ～５０ｃに印加される電圧を一定電圧に保持する。 The circuit protection unit 40 is a circuit that protects the voltage detection ICs 50a to 50c, and includes a fuse 41 and a Zener diode 42. The fuse 41 is provided in each connection line 30, and when a current of a predetermined current value or more flows through the connection line 30, an open failure causes an electrical connection between each battery cell 12 and the voltage detection ICs 50a to 50c. Cut off. Further, the Zener diode 42 is connected between the connection lines 30 and holds the voltage applied to the voltage detection ICs 50a to 50c at a constant voltage.

制御部５４は、ＣＰＵ、ＲＯＭ、ＲＡＭ等からなるマイクロコンピュータ、およびその周辺機器で構成されており、ＲＯＭ等の記憶手段に記憶された制御プログラムに従って各種処理を実施する。本実施形態では、制御部５４は、各電圧検出ＩＣ５０ａ～５０ｃの制御処理や組電池１０の電圧異常の判定処理を実行する。 The control unit 54 is composed of a microcomputer including a CPU, ROM, RAM, and peripheral devices thereof, and performs various processes according to a control program stored in a storage means such as ROM. In the present embodiment, the control unit 54 executes control processing for each voltage detection IC 50a to 50c and voltage abnormality determination processing for the assembled battery 10.

絶縁部５３は、各電圧検出ＩＣ５０ａ～５０ｃおよび制御部５４の間を絶縁した状態で、双方向に信号を伝達可能にする信号伝達手段であり、例えば、フォトカプラ等で構成されている。各電圧検出ＩＣ５０ａ～５０ｃからは、絶縁部５３を介して組電池１０の電圧状態等を示す信号が制御部５４に出力される。 The insulating unit 53 is a signal transmission means capable of transmitting signals in both directions while insulating between the voltage detection ICs 50a to 50c and the control unit 54, and is composed of, for example, a photocoupler or the like. From each of the voltage detection ICs 50a to 50c, a signal indicating the voltage state of the assembled battery 10 and the like is output to the control unit 54 via the insulating unit 53.

接続線３０間には、ノイズ除去用のコンデンサが設けられている。具体的には、各電池セル１２において、正極側及び負極側の各接続線３０を接続する第１バイパス線４３には、第１コンデンサ４５が設けられている。また、各電池ブロック１１ａ～１１ｃにおける正極接続線３０ａと負極接続線３０ｂとを接続する第２バイパス線４４には、第２コンデンサ４６が設けられている。 A capacitor for removing noise is provided between the connection lines 30. Specifically, in each battery cell 12, a first capacitor 45 is provided on the first bypass wire 43 connecting the connection wires 30 on the positive electrode side and the negative electrode side. Further, a second capacitor 46 is provided on the second bypass line 44 connecting the positive electrode connection line 30a and the negative electrode connection line 30b in each of the battery blocks 11a to 11c.

電池監視装置７０がノイズ除去用のコンデンサ４５，４６を備えることにより、コネクタにより電池監視装置７０を組電池１０に接続する際に、第１，第２コンデンサ４５，４６に突入電流が流れる場合がある。また、突入電流に起因して、各接続線３０に高電圧が生じる場合があり、電池監視装置７０を劣化させる要因となる。そこで、このような突入電流を抑制することを目的に、全ての接続線３０に抵抗素子を設けることが考えられる。しかし、全ての接続線３０に抵抗素子を設けることにより、接続線３０の抵抗値が大きくなり、接続線３０に流れる電流量が過剰に抑制されることが懸念される。そのため、ヒューズ４１が適正に機能しなくなることが懸念される。また、接続線３０に追加した抵抗素子の分だけ電池監視装置７０を構成する基板の体格が増大してしまうことも懸念される。 Since the battery monitoring device 70 includes the capacitors 45 and 46 for noise removal, an inrush current may flow through the first and second capacitors 45 and 46 when the battery monitoring device 70 is connected to the assembled battery 10 by the connector. be. Further, a high voltage may be generated in each connection line 30 due to the inrush current, which causes deterioration of the battery monitoring device 70. Therefore, for the purpose of suppressing such inrush current, it is conceivable to provide resistance elements in all the connection lines 30. However, by providing resistance elements in all the connecting lines 30, there is a concern that the resistance value of the connecting lines 30 will increase and the amount of current flowing through the connecting lines 30 will be excessively suppressed. Therefore, there is a concern that the fuse 41 will not function properly. Further, there is a concern that the physique of the substrate constituting the battery monitoring device 70 will increase by the amount of the resistance element added to the connection line 30.

ここで、コネクタ２０により電池監視装置７０が各電池ブロック１１ａ～１１ｃに接続される際に、各接続線３０の導通順序が異なり、第２コンデンサ４６の端子間に印加される電圧が異なることが懸念される。ここで、各接続線３０の導通順序は、コネクタ２０の各コネクタ端子における物理的な接続順序に依って異なることが考えられる。これ以外にも、各コネクタ端子に繋がる接続線３０のインピーダンスに依っても異なることが考えられる。第２コンデンサ４６の端子間に印加される電圧が異なることにより、突入電流の大きさが異なる。具体的には、正極接続線３０ａ及び負極接続線３０ｂが最初に導通することにより、正極接続線３０ａと負極接続線３０ｂとを接続する第２バイパス線４４上の第２コンデンサ４６に電池ブロック１１ａ～１１ｃから最も大きな電圧が印加される。その結果、突入電流が最も大きくなる。 Here, when the battery monitoring device 70 is connected to the battery blocks 11a to 11c by the connector 20, the conduction order of the connection lines 30 is different, and the voltage applied between the terminals of the second capacitor 46 is different. I am concerned. Here, it is conceivable that the order of conduction of each connection line 30 differs depending on the physical connection order of each connector terminal of the connector 20. In addition to this, it may be different depending on the impedance of the connection line 30 connected to each connector terminal. Since the voltage applied between the terminals of the second capacitor 46 is different, the magnitude of the inrush current is different. Specifically, the battery block 11a is connected to the second capacitor 46 on the second bypass line 44 that connects the positive electrode connection line 30a and the negative electrode connection line 30b by first conducting the positive electrode connection line 30a and the negative electrode connection line 30b. The largest voltage is applied from ~ 11c. As a result, the inrush current is the largest.

本実施形態では、コネクタ２０により電池監視装置７０を組電池１０に接続する際に、第２コンデンサ４６に最も大きな電圧が印加される際の突入電流が流れる経路に、主抵抗素子６０が設けられている。具体的には、主抵抗素子６０は、正極接続線３０ａにおけるコネクタ２０側の端部から第２バイパス線４４との接続点までの経路である高電位側経路Ｌ１に設けられている。なお、負極接続線３０ｂにおけるコネクタ２０側の端部から第２バイパス線４４との接続点までの経路を低電位側経路Ｌ２と称す。 In the present embodiment, when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the main resistance element 60 is provided in the path through which the inrush current when the maximum voltage is applied to the second capacitor 46 flows. ing. Specifically, the main resistance element 60 is provided in the high potential side path L1 which is a path from the end of the positive electrode connection line 30a on the connector 20 side to the connection point with the second bypass line 44. The path from the end of the negative electrode connection line 30b on the connector 20 side to the connection point with the second bypass line 44 is referred to as a low potential side path L2.

コネクタ２０により、電池監視装置７０が組電池１０に接続される際に、電池ブロック１１ａ～１１ｃの高電位側セル１２ａにおいて負極側に接続された接続線３０と、低電位側セル１２ｂにおいて正極側に接続された接続線３０とが最初に導通する場合がある。この場合、突入電流が、主抵抗素子６０を経由することなく、接続線３０を流れる場合がある。具体的には、正極接続線３０ａにおいて、第１バイパス線４３との接続点と第２バイパス線４４との接続点との間の位置、及び負極接続線３０ｂにおいて第１バイパス線４３との接続点と第２バイパス線４４との接続点との間の位置を経由して、突入電流が流れることが懸念される。この場合、電池ブロック１１ａ～１１ｃのうち、高電位側セル１２ａ及び低電位側セル１２ｂを除く他の電池セル１２からの電圧が第２バイパス線４４上の第２コンデンサ４６に印加されるため、第２バイパス線４４には、最も大きな突入電流ではないが、次に大きな突入電流が流れる。 When the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the connection line 30 connected to the negative electrode side in the high potential side cells 12a of the battery blocks 11a to 11c and the positive electrode side in the low potential side cells 12b. In some cases, the connection line 30 connected to the connection line 30 may be electrically connected first. In this case, the inrush current may flow through the connection line 30 without passing through the main resistance element 60. Specifically, the position between the connection point with the first bypass line 43 and the connection point with the second bypass line 44 on the positive electrode connection line 30a, and the connection with the first bypass line 43 on the negative electrode connection line 30b. There is concern that an inrush current will flow through the position between the point and the connection point with the second bypass line 44. In this case, among the battery blocks 11a to 11c, the voltage from the other battery cells 12 excluding the high potential side cell 12a and the low potential side cell 12b is applied to the second capacitor 46 on the second bypass line 44. The second bypass line 44 has the next largest inrush current, but not the largest inrush current.

そこで、本実施形態では、コネクタ２０により電池監視装置７０を組電池１０に接続する際に、電池ブロック１１ａ～１１ｃから最大電圧の次に大きな電圧が印加される経路上に、副抵抗素子６１が設けられている。具体的には、副抵抗素子６１は、正極接続線３０ａにおいて第１バイパス線４３との接続点と第２バイパス線４４との接続点との間の位置に設けられている。 Therefore, in the present embodiment, when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the auxiliary resistance element 61 is placed on the path to which the next largest voltage is applied from the battery blocks 11a to 11c. It is provided. Specifically, the auxiliary resistance element 61 is provided at a position on the positive electrode connection line 30a between the connection point with the first bypass line 43 and the connection point with the second bypass line 44.

主抵抗素子６０及び副抵抗素子６１が、低電位側経路Ｌ２に設けられていると、いわゆるグランドバウンスにより電圧検出ＩＣ５０ａ～５０ｃの基準電圧として用いられる負極接続線３０ｂの電圧が意図する値とならないことが懸念される。そこで、各抵抗素子６０，６１が高電位側経路Ｌ１に設けられことにより、基準電圧が意図とする値とならないことが防止され、電圧検出ＩＣ５０ａ～５０ｃがセル電位を適正に検出することができる。なお、本実施形態では、主抵抗素子６０は、副抵抗素子６１よりも抵抗値が大きい。 When the main resistance element 60 and the sub-resistance element 61 are provided in the low potential side path L2, the voltage of the negative electrode connection line 30b used as the reference voltage of the voltage detection ICs 50a to 50c by so-called ground bounce does not become the intended value. Is a concern. Therefore, by providing the resistance elements 60 and 61 in the high potential side path L1, it is prevented that the reference voltage does not reach the intended value, and the voltage detection ICs 50a to 50c can appropriately detect the cell potential. .. In this embodiment, the main resistance element 60 has a larger resistance value than the sub-resistance element 61.

次に、図２，図３を用いて、電池監視装置７０を組電池１０に接続する際の各接続線３０の導通順序と、各抵抗素子６０，６１により突入電流を抑制する機能とを説明する。図２，図３では、電源システム１００において、電池ブロック１１ａと、電圧検出ＩＣ５０ａとを図示し、電池ブロック１１ｂ，１１ｃと、電圧検出ＩＣ５０ｂ，５０ｃとの図示を省略している。また、各接続線３０のうち導通している接続線３０にはコネクタ端子を記載し、導通していない接続線３０にはコネクタ端子を記載していない。 Next, using FIGS. 2 and 3, the conduction order of each connection line 30 when the battery monitoring device 70 is connected to the assembled battery 10 and the function of suppressing the inrush current by the resistance elements 60 and 61 will be described. do. 2 and 3 show the battery block 11a and the voltage detection IC 50a in the power supply system 100, and omit the illustration of the battery blocks 11b and 11c and the voltage detection ICs 50b and 50c. Further, among the connection lines 30, the connector terminal is not described for the connecting line 30 that is conducting, and the connector terminal is not described for the connecting line 30 that is not conducting.

図２では、電池監視装置７０をコネクタ２０により組電池１０に接続した際に、正極接続線３０ａと負極接続線３０ｂとが最初に導通する場合を示している。この場合、高電位側セル１２ａの正極側に接続されたコネクタ端子２１から、高電位側経路Ｌ１、第２バイパス線４４、低電位側経路Ｌ２を経由して、低電位側セル１２ｂの負極側に接続されたコネクタ端子２２に至る電流経路Ｃ１が形成され、この電流経路Ｃ１に突入電流が流れる。このとき、コネクタ２０の各端子２１，２２間に生じる電圧は、電池ブロック１１ａを構成する全ての電池セル１２のセル電圧の総和となるため、この電流経路Ｃ１を流れる突入電流は最も大きくなる。 FIG. 2 shows a case where the positive electrode connection line 30a and the negative electrode connection line 30b first conduct with each other when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20. In this case, from the connector terminal 21 connected to the positive electrode side of the high potential side cell 12a, via the high potential side path L1, the second bypass line 44, and the low potential side path L2, the negative electrode side of the low potential side cell 12b. A current path C1 leading to the connector terminal 22 connected to the current path C1 is formed, and an inrush current flows through the current path C1. At this time, the voltage generated between the terminals 21 and 22 of the connector 20 is the sum of the cell voltages of all the battery cells 12 constituting the battery block 11a, so that the inrush current flowing through the current path C1 is the largest.

本実施形態では、電流経路Ｃ１に含まれる高電位側経路Ｌ１に主抵抗素子６０が設けられており、この主抵抗素子６０による電圧降下により、第２バイパス線４４の第２コンデンサ４６に印加される電圧が抑制される。そのため、電流経路Ｃ１に流れる突入電流が抑制される。 In the present embodiment, the main resistance element 60 is provided in the high potential side path L1 included in the current path C1, and is applied to the second capacitor 46 of the second bypass line 44 due to the voltage drop caused by the main resistance element 60. Voltage is suppressed. Therefore, the inrush current flowing in the current path C1 is suppressed.

図３では、電池監視装置７０を組電池１０に接続した際に、高電位側セル１２ａにおいて負極側の接続線３０ｃと、低電位側セル１２ｂにおいて負極側の接続線である負極接続線３０ｂとが最初に導通する場合を示している。この場合、高電位側セル１２ａの負極側に接続されたコネクタ端子２３から、接続線３０ｃ、第１コンデンサ４５ａ，第２コンデンサ４６、及び低電位側経路Ｌ２を経由して、低電位側セル１２ｂの負極側に接続されたコネクタ端子２２に至る電流経路Ｃ２が形成される。そして、この電流経路Ｃ２に突入電流が流れる。ここで、電流経路Ｃ２は、高電位側経路Ｌ１を含まないため、突入電流は主抵抗素子６０に流れない。また、コネクタ端子２２，２３間に生じる電圧は、電池ブロック１１ａを構成する全ての電池セル１２のうち、高電位側セル１２ａを除く各電池セル１２のセル電圧の総和となる。そのため、電流経路Ｃ２を流れる突入電流は、電流経路Ｃ１を流れる突入電流の次に大きな値となる。なお、高電位側セル１２ａにおいて負極側の接続線３０ｃと、低電位側セル１２ｂにおいて正極側の接続線とが最初に導通する場合においても、突入電流が主抵抗素子６０を介することなく電池監視装置７０を流れるおそれがある。 In FIG. 3, when the battery monitoring device 70 is connected to the assembled battery 10, the negative electrode side connection line 30c in the high potential side cell 12a and the negative electrode connection line 30b which is the negative electrode side connection line in the low potential side cell 12b. Shows the case where is first conducted. In this case, from the connector terminal 23 connected to the negative electrode side of the high potential side cell 12a, the low potential side cell 12b is passed through the connection line 30c, the first capacitor 45a, the second capacitor 46, and the low potential side path L2. A current path C2 leading to the connector terminal 22 connected to the negative electrode side of the is formed. Then, an inrush current flows through this current path C2. Here, since the current path C2 does not include the high potential side path L1, the inrush current does not flow to the main resistance element 60. The voltage generated between the connector terminals 22 and 23 is the sum of the cell voltages of all the battery cells 12 constituting the battery block 11a, except for the high potential side cell 12a. Therefore, the inrush current flowing through the current path C2 has the next largest value after the inrush current flowing through the current path C1. Even when the connection line 30c on the negative electrode side in the high potential side cell 12a and the connection line on the positive electrode side in the low potential side cell 12b first conduct with each other, the inrush current does not go through the main resistance element 60 to monitor the battery. There is a risk of flowing through the device 70.

本実施形態では、正極接続線３０ａにおける第１バイパス線４３との接続点と第２バイパス線４４との接続点との間の位置に、副抵抗素子６１が設けられている。そのため、この副抵抗素子６１による電圧降下により、第２バイパス線４４の第２コンデンサ４６に印加される電圧が抑制される。そのため、電流経路Ｃ２に流れる突入電流が抑制される。 In the present embodiment, the auxiliary resistance element 61 is provided at a position on the positive electrode connection line 30a between the connection point with the first bypass line 43 and the connection point with the second bypass line 44. Therefore, the voltage applied to the second capacitor 46 of the second bypass line 44 is suppressed by the voltage drop due to the sub-resistance element 61. Therefore, the inrush current flowing in the current path C2 is suppressed.

以上説明した本実施形態では、以下の効果を奏することができる。 In the present embodiment described above, the following effects can be obtained.

・電池監視装置７０は、正極接続線３０ａのうちコネクタ２０側の端部から第２バイパス線４４との接続点までの経路である高電位側経路Ｌ１に主抵抗素子６０が設けられている。この場合、電池監視装置７０をコネクタ２０により組電池１０に接続する際に、主抵抗素子６０により第２コンデンサ４６に印加される電圧が抑制され、突入電流の最大値を抑制することができる。また、第２コンデンサ４６に最も大きな電圧が印加される際の突入電流が流れる経路にのみ主抵抗素子６０が設けられている。そのため、全ての接続線３０に抵抗素子を設ける構成よりも、電池監視装置７０を構成する基板の体格の増大を抑制できる。その結果、コネクタ２０により電池監視装置７０を組電池１０に接続する際に生じる突入電流を好適に抑制することができる。 The battery monitoring device 70 is provided with a main resistance element 60 in the high potential side path L1 which is a path from the end of the positive electrode connection line 30a on the connector 20 side to the connection point with the second bypass line 44. In this case, when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the voltage applied to the second capacitor 46 is suppressed by the main resistance element 60, and the maximum value of the inrush current can be suppressed. Further, the main resistance element 60 is provided only in the path through which the inrush current flows when the maximum voltage is applied to the second capacitor 46. Therefore, it is possible to suppress an increase in the physique of the substrate constituting the battery monitoring device 70, as compared with a configuration in which resistance elements are provided in all the connection lines 30. As a result, the inrush current generated when the battery monitoring device 70 is connected to the assembled battery 10 can be suitably suppressed by the connector 20.

・主抵抗素子６０は、高電位側経路Ｌ１に設けられている。この場合、主抵抗素子６０と第２コンデンサ４６とにより直列回路が形成されることが防止されるため、第２コンデンサ４６を適正に機能させることができる。 The main resistance element 60 is provided in the high potential side path L1. In this case, since the series circuit is prevented from being formed by the main resistance element 60 and the second capacitor 46, the second capacitor 46 can function properly.

・正極接続線３０ａにおいて第１バイパス線４３との接続点と第２バイパス線４４との接続点との間の位置に副抵抗素子６１が設けられている。この場合、コネクタ２０により電池監視装置７０を組電池１０に接続する毎に、突入電流が流れる経路が異なる場合でも、突入電流を好適に抑制することができる。 A sub-resistance element 61 is provided at a position between the connection point with the first bypass line 43 and the connection point with the second bypass line 44 in the positive electrode connection line 30a. In this case, each time the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the inrush current can be suitably suppressed even if the path through which the inrush current flows is different.

・主抵抗素子６０及び副抵抗素子６１は、高電位側経路Ｌ１及び低電位側経路Ｌ２のうち、高電位側経路Ｌ１に設けられている。この場合、負極接続線３０ｂの基準電圧が意図とする値とならないことが防止され、電圧検出ＩＣ５０ａ～５０ｃがセル電位を適正に検出することができる。 The main resistance element 60 and the sub-resistance element 61 are provided in the high potential side path L1 of the high potential side path L1 and the low potential side path L2. In this case, it is prevented that the reference voltage of the negative electrode connection line 30b does not become the intended value, and the voltage detection ICs 50a to 50c can appropriately detect the cell potential.

（第１実施形態の変形例）
・主抵抗素子６０が高電位側経路Ｌ１に設けられる構成に換えて、低電位側経路Ｌ２に設けられる構成としても良い。この場合において、副抵抗素子６１が、負極接続線３０ｂにおいて、第１バイパス線４３と第２バイパス線４４との間の位置に設けられる構成としても良い。 (Variation example of the first embodiment)
The main resistance element 60 may be provided in the low potential side path L2 instead of the configuration provided in the high potential side path L1. In this case, the auxiliary resistance element 61 may be provided at a position between the first bypass line 43 and the second bypass line 44 on the negative electrode connection line 30b.

・主抵抗素子６０が高電位側経路Ｌ１に設けられる構成に換えて、主抵抗素子６０が第２バイパス線４４に設けられる構成としてもよい。 The main resistance element 60 may be provided on the second bypass line 44 instead of the configuration in which the main resistance element 60 is provided on the high potential side path L1.

・主抵抗素子６０が、高電位側経路Ｌ１，低電位側経路Ｌ２及び第２バイパス線４４のそれぞれに設けられる構成としても良い。 The main resistance element 60 may be provided in each of the high potential side path L1, the low potential side path L2, and the second bypass line 44.

・副抵抗素子６１が正極接続線３０ａに設けられる構成に換えて、副抵抗素子６１が負極接続線３０ｂに設けられる構成としても良い。 The sub-resistance element 61 may be provided on the negative electrode connection line 30b instead of the configuration in which the sub-resistance element 61 is provided on the positive electrode connection line 30a.

（第２実施形態）
第２実施形態では、第１実施形態と異なる構成を主に説明する。なお、第２実施形態において第１実施形態と同一の箇所には同一の符号を付し、その説明は繰り返さない。 (Second Embodiment)
In the second embodiment, a configuration different from that of the first embodiment will be mainly described. In the second embodiment, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will not be repeated.

図４は、本実施形態に係る各抵抗素子の実装位置を説明する図である。なお、図４では、電池ブロック１１ａ及び電圧検出ＩＣ５０ａを図示しており、電池ブロック１１ｂ，１１ｃ及び電圧検出ＩＣ５０ｂ，５０ｃの図示を省略している。 FIG. 4 is a diagram illustrating a mounting position of each resistance element according to the present embodiment. Note that FIG. 4 shows the battery block 11a and the voltage detection IC 50a, and the battery blocks 11b and 11c and the voltage detection ICs 50b and 50c are not shown.

本実施形態では、第２バイパス線１４４は、正極接続線３０ａにおいて第１バイパス線１４３との接続点よりもコネクタ２０側と反対側の位置と、負極接続線３０ｂにおいて第１バイパス線１４３との接続点よりもコネクタ２０側と反対側の位置との間に接続されている。第１バイパス線１４３には、第１コンデンサ１４５が設けられている。また、第２バイパス線１４４には、第２コンデンサ１４６が設けられている。 In the present embodiment, the second bypass line 144 is located at a position opposite to the connector 20 side of the connection point with the first bypass line 143 in the positive electrode connection line 30a, and the first bypass line 143 in the negative electrode connection line 30b. It is connected between the position on the connector 20 side and the position opposite to the connection point. The first bypass line 143 is provided with a first capacitor 145. Further, the second bypass line 144 is provided with a second capacitor 146.

正極接続線３０ａのうちコネクタ側の端部から第２バイパス線１４４との接続点までの経路である高電位側経路には第１抵抗素子６２が設けられている。また、負極接続線３０ｂのうちコネクタ側の端部から第２バイパス線１４４との接続点までの経路である低電位側経路には第２抵抗素子６３が設けられている。 The first resistance element 62 is provided in the high potential side path which is the path from the end portion of the positive electrode connection line 30a on the connector side to the connection point with the second bypass line 144. Further, the second resistance element 63 is provided in the low potential side path which is the path from the end portion of the negative electrode connection line 30b on the connector side to the connection point with the second bypass line 144.

本実施形態では、コネクタ２０により電池監視装置７０を組電池１０に接続する際に、正極接続線３０ａ及び負極接続線３０ｂが最初に導通する場合がある。この場合、高電位側セル１２ａの正極側に接続されたコネクタ端子から、高電位側経路、第２バイパス線１４４、低電位側経路を経由して、低電位側セル１２ｂの負極側に接続されたコネクタ端子に至る電流経路が形成され、この電流経路に突入電流が流れる。 In the present embodiment, when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the positive electrode connection line 30a and the negative electrode connection line 30b may be electrically connected first. In this case, the connector terminal connected to the positive electrode side of the high potential side cell 12a is connected to the negative electrode side of the low potential side cell 12b via the high potential side path, the second bypass line 144, and the low potential side path. A current path leading to the connector terminal is formed, and an inrush current flows through this current path.

また、コネクタ２０により電池監視装置７０を組電池１０に接続する際に、接続線３０ｃと接続線３０ｄとが最初に導通する場合がある。この場合、高電位側セル１２ａの負極側に接続されたコネクタ端子から、接続線３０ｃ、第１コンデンサ１４５ａ，第２コンデンサ１４６、及び第１コンデンサ１４５ｂを経由して、低電位側セル１２ｂの正極側に接続されたコネクタ端子に至る電流経路が形成される。そして、この電流経路に突入電流が流れる。 Further, when the battery monitoring device 70 is connected to the assembled battery 10 by the connector 20, the connection line 30c and the connection line 30d may be electrically connected first. In this case, from the connector terminal connected to the negative electrode side of the high potential side cell 12a, the positive electrode of the low potential side cell 12b is passed through the connection line 30c, the first capacitor 145a, the second capacitor 146, and the first capacitor 145b. A current path is formed to the connector terminal connected to the side. Then, an inrush current flows in this current path.

本実施形態では、いずれの電流経路が形成される場合においても、電流経路上の位置に第１，第２抵抗素子６２，６３が設けられており、この第１，第２抵抗素子６２，６３による電圧降下により、第２コンデンサ１４６に印加される電圧が抑制される。そのため、突入電流が抑制される。 In the present embodiment, the first and second resistance elements 62 and 63 are provided at positions on the current path regardless of which current path is formed, and the first and second resistance elements 62 and 63 are provided. Due to the voltage drop due to the above, the voltage applied to the second capacitor 146 is suppressed. Therefore, the inrush current is suppressed.

以上説明した本実施形態では、第１実施形態と同様の効果を奏する。 The present embodiment described above has the same effect as that of the first embodiment.

（他の実施形態）
・電圧検出ＩＣを、電池ブロック１１ａ～１１ｃ毎に設ける構成とすることに換えて、組電池１０に対して１つの電圧検出ＩＣのみを備える構成としても良い。この場合、組電池１０が電池セル接続体に相当する。 (Other embodiments)
-Instead of the configuration in which the voltage detection IC is provided for each of the battery blocks 11a to 11c, a configuration in which only one voltage detection IC is provided for the assembled battery 10 may be provided. In this case, the assembled battery 10 corresponds to the battery cell connection body.

・電池監視装置７０は、回路保護部４０を備えていなくとも良い。 -The battery monitoring device 70 does not have to include the circuit protection unit 40.

１０…組電池、１１ａ～１１ｃ…電池ブロック、１２…電池セル、２０…コネクタ、３０…接続線、３０ａ…正極接続線、３０ｂ…負極接続線、４３…第１バイパス線、４４…第２バイパス線、４５…第１コンデンサ、４６…第２コンデンサ、６０…主抵抗素子。 10 ... assembled battery, 11a to 11c ... battery block, 12 ... battery cell, 20 ... connector, 30 ... connection line, 30a ... positive electrode connection line, 30b ... negative electrode connection line, 43 ... first bypass line, 44 ... second bypass Wire, 45 ... 1st capacitor, 46 ... 2nd capacitor, 60 ... Main resistance element.

Claims (3)

複数の電池セル（１２）を直列接続して構成された電池セル接続体（１１ａ～１１ｃ）に適用され、コネクタ（２０）により前記各電池セルの両端のそれぞれに接続線（１３）が接続され、前記接続線により前記電池セル毎のセル電圧を検出する電池監視装置（７０）であって、
前記各電池セルにおける正極側及び負極側の前記各接続線を接続する第１バイパス線（４３）に設けられた第１コンデンサ（４５）と、
前記電池セル接続体において、その正極端子に接続される前記接続線である正極接続線（３０ａ）と、負極端子に接続される前記接続線である負極接続線（３０ｂ）とを接続する経路である第２バイパス線（４４）に設けられた第２コンデンサ（４６）と、
前記正極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である高電位側経路、及び前記負極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である低電位側経路の少なくともいずれかに設けられた主抵抗素子（６０）と、
を備え、
前記第２バイパス線は、前記正極接続線において前記第１バイパス線との接続点よりも前記コネクタ側の位置と、前記負極接続線において前記第１バイパス線との接続点よりも前記コネクタ側の位置との間に接続されており、
前記正極接続線において前記第１バイパス線との接続点と前記第２バイパス線との接続点との間の位置、及び前記負極接続線において、前記第１バイパス線との接続点と前記第２バイパス線との接続点との間の位置の少なくともいずれかに設けられた副抵抗素子（６１）を備える電池監視装置。 It is applied to a battery cell connection body (11a to 11c) configured by connecting a plurality of battery cells (12) in series, and a connection line (13) is connected to each of both ends of each battery cell by a connector (20). A battery monitoring device (70) that detects the cell voltage of each battery cell by the connection line.
A first capacitor (45) provided on a first bypass line (43) connecting the positive electrode side and the negative electrode side connection lines in each battery cell, and
In the battery cell connection body, a route connecting the positive electrode connection line (30a), which is the connection line connected to the positive electrode terminal, and the negative electrode connection line (30b), which is the connection line connected to the negative electrode terminal. A second capacitor (46) provided on a second bypass wire (44) and
The high potential side path , which is the path from the end of the positive electrode connection line on the connector side to the connection point with the second bypass line, and the second bypass from the end of the negative electrode connection line on the connector side. A main resistance element (60) provided in at least one of the low potential side paths which is a path to the connection point with the wire, and
Equipped with
The second bypass line is located on the connector side of the positive electrode connection line from the connection point with the first bypass line, and on the negative electrode connection line, on the connector side of the connection point with the first bypass line. It is connected to the position and
In the positive electrode connection line, the position between the connection point with the first bypass line and the connection point with the second bypass line, and in the negative electrode connection line, the connection point with the first bypass line and the second bypass line. A battery monitoring device including an auxiliary resistance element (61) provided at at least one of the positions between the bypass wire and the connection point . 前記主抵抗素子及び前記副抵抗素子は、前記高電位側経路及び前記低電位側経路のうち、前記高電位側経路に設けられている請求項１に記載の電池監視装置。 The battery monitoring device according to claim 1 , wherein the main resistance element and the sub-resistance element are provided in the high potential side path among the high potential side path and the low potential side path. 複数の電池セル（１２）を直列接続して構成された電池セル接続体（１１ａ～１１ｃ）に適用され、コネクタ（２０）により前記各電池セルの両端のそれぞれに接続線（１３）が接続され、前記接続線により前記電池セル毎のセル電圧を検出する電池監視装置（７０）であって、
前記各電池セルにおける正極側及び負極側の前記各接続線を接続する第１バイパス線（４３）に設けられた第１コンデンサ（４５）と、
前記電池セル接続体において、その正極端子に接続される前記接続線である正極接続線（３０ａ）と、負極端子に接続される前記接続線である負極接続線（３０ｂ）とを接続する経路である第２バイパス線（４４）に設けられた第２コンデンサ（４６）と、
を備え、
前記第２バイパス線は、前記正極接続線において前記第１バイパス線との接続点よりも前記コネクタ側と反対側の位置と、前記負極接続線において前記第１コンデンサとの接続点よりも前記コネクタ側と反対側の位置との間に接続されており、
前記正極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である高電位側経路に設けられた第１抵抗素子（６２）と、
前記負極接続線のうち前記コネクタ側の端部から前記第２バイパス線との接続点までの経路である低電位側経路に設けられた第２抵抗素子（６３）と、
を備える電池監視装置。 It is applied to a battery cell connection body (11a to 11c) configured by connecting a plurality of battery cells (12) in series, and a connection line (13) is connected to each of both ends of each battery cell by a connector (20). A battery monitoring device (70) that detects the cell voltage of each battery cell by the connection line.
A first capacitor (45) provided on a first bypass line (43) connecting the positive electrode side and the negative electrode side connection lines in each battery cell, and
In the battery cell connection body, a route connecting the positive electrode connection line (30a), which is the connection line connected to the positive electrode terminal, and the negative electrode connection line (30b), which is the connection line connected to the negative electrode terminal. A second capacitor (46) provided on a second bypass wire (44) and
Equipped with
The second bypass line is located at a position on the positive electrode connection line opposite to the connector side of the connection point with the first bypass line, and the connector on the negative electrode connection line with respect to the connection point with the first capacitor. It is connected between the side and the opposite position,
The first resistance element (62) provided in the high potential side path, which is the path from the end of the positive electrode connection line on the connector side to the connection point with the second bypass line,
A second resistance element (63) provided in the low potential side path which is a path from the end portion of the negative electrode connection line on the connector side to the connection point with the second bypass line.
Battery monitoring device.
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Publication number Priority date Publication date Assignee Title
WO2013140605A1 (en) 2012-03-23 2013-09-26 日立ビークルエナジー株式会社 Storage battery control device and electricity storage device
JP2014169913A (en) 2013-03-04 2014-09-18 Denso Corp Voltage detector of battery pack

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013140605A1 (en) 2012-03-23 2013-09-26 日立ビークルエナジー株式会社 Storage battery control device and electricity storage device
JP2014169913A (en) 2013-03-04 2014-09-18 Denso Corp Voltage detector of battery pack

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