JP5290662B2 - Battery module external short circuit system - Google Patents

Battery module external short circuit system Download PDF

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JP5290662B2
JP5290662B2 JP2008211577A JP2008211577A JP5290662B2 JP 5290662 B2 JP5290662 B2 JP 5290662B2 JP 2008211577 A JP2008211577 A JP 2008211577A JP 2008211577 A JP2008211577 A JP 2008211577A JP 5290662 B2 JP5290662 B2 JP 5290662B2
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battery
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current collector
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JP2010049870A (en
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和也 西村
香津雄 堤
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Kawasaki Motors Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description

本発明は、多数の二次電池を接続してなる電池モジュールにおいて、異常が発生した電池を外部短絡させるシステムに関する。   The present invention relates to a system for externally short-circuiting an abnormal battery in a battery module formed by connecting a large number of secondary batteries.

従来、主として携帯機器用の電源として使用する充放電可能な種々の二次電池が提案されてきた。さらには、近年、環境への配慮から、自動車や電車などの車両に充放電可能な二次電池を搭載したものが開発されている。車両に二次電池を搭載した場合には、ブレーキ時に生じる回生電力をこの搭載電池に蓄えておき、車両の動力源として使用することができるので、車両のエネルギー効率を高めることができる。このように車両に搭載する二次電池としては、エネルギー密度、耐久性、製造コストなどの諸条件から、例えばニッケル水素二次電池が適しているとされる（特許文献１）。このように、電池を車両の動力源として使用する場合には、高電圧が要求されるので、多数の単位電池を直列に接続した電池モジュールを構成する必要がある。   Conventionally, various rechargeable secondary batteries used mainly as a power source for portable devices have been proposed. Furthermore, in recent years, a battery equipped with a rechargeable battery has been developed for vehicles such as automobiles and trains in consideration of the environment. When a secondary battery is mounted on a vehicle, regenerative power generated during braking can be stored in the mounted battery and used as a power source for the vehicle, so that the energy efficiency of the vehicle can be increased. Thus, as a secondary battery mounted on a vehicle, for example, a nickel hydride secondary battery is considered suitable from various conditions such as energy density, durability, and manufacturing cost (Patent Document 1). As described above, when a battery is used as a power source of a vehicle, a high voltage is required. Therefore, it is necessary to configure a battery module in which a large number of unit batteries are connected in series.

多数の電池を直列接続して構成される電池モジュールにおいては、充放電サイクルを繰り返す過程で、単位電池間の性能劣化度合いにバラつきが生じ、充放電容量のバランスが大きく崩れた状態が発生することがある。他の単位電池に比較して充放電容量が極端に劣化した単位電池が発生した状態で電池モジュールの充放電を行えば、劣化した単位電池が過充電または過放電されることになり、電池モジュールの性能を維持することが困難となる。   In a battery module configured by connecting a large number of batteries in series, there is a variation in the degree of performance deterioration between the unit batteries in the process of repeating the charge / discharge cycle, and a state in which the balance of the charge / discharge capacity is greatly lost occurs. There is. If a battery module is charged / discharged in a state where a unit battery with extremely deteriorated charge / discharge capacity compared to other unit batteries is generated, the deteriorated unit battery will be overcharged or overdischarged. It becomes difficult to maintain the performance.

このような場合、各単位電池の電圧をモニターしておき、極端に容量の劣化した異常電池を検出したときに、電池搭載機器の使用を停止することが、電池の性能維持の観点からは好ましい。しかしながら、電池モジュールを搭載する機器の観点から、例えば交通機関として使用される車両においては、機器の運転を急に停止することが搭乗者にとってはかえって不都合となる場合もあるので、異常な単位電池を検出しても、しばらくは運転を継続しなければならないことがある。そのために、異常な単位電池の正極端子と負極端子とを外部短絡させて、実質的に残りの単位電池のみを用いて車両の運行を継続することが考えられる。   In such a case, it is preferable from the viewpoint of maintaining the performance of the battery that the voltage of each unit battery is monitored and the use of the battery-equipped device is stopped when an abnormal battery having extremely deteriorated capacity is detected. . However, from the viewpoint of a device equipped with a battery module, for example, in a vehicle used as a transportation facility, it may be inconvenient for the passenger to stop the operation of the device suddenly. Even if detected, it may be necessary to continue driving for a while. Therefore, it is conceivable that the positive terminal and the negative terminal of the abnormal unit battery are externally short-circuited and the operation of the vehicle is continued using substantially only the remaining unit battery.

しかしながら、このような方法を用いる場合、電池モジュールにおける残りの各単位電池には、１セル外した分の過剰な充放電電圧がかかることになるので、過充電・過放電に対する性能維持が特に困難であるリチウムイオン二次電池においては、異常電池を外部短絡させる方法を適用することができない。また、ニッケル水素電池のようなアルカリ系二次電池であっても、放電電流の小さな用途であれば、電池モジュールに搭載する安全回路によって、極端に容量が劣化した単位電池を残りの電池から電気的に切り離すことが可能であるが、車両用途のような大電流で放電される用途においては、大電流に耐え得る回路を設計することは、回路寸法やコストの面から現実的ではない。   However, when such a method is used, each unit battery remaining in the battery module is charged with an excessive charge / discharge voltage for the amount of one cell removed, so that it is particularly difficult to maintain performance against overcharge / overdischarge. In the lithium ion secondary battery, the method of externally short-circuiting the abnormal battery cannot be applied. In addition, even for alkaline secondary batteries such as nickel metal hydride batteries, if the discharge current is small, unit batteries with extremely deteriorated capacity can be electrically However, it is not practical in terms of circuit dimensions and cost to design a circuit that can withstand a large current in an application that is discharged with a large current, such as a vehicle application.

特開２００１−１１０３８１号公報JP 2001-110381 A

本発明の目的は、上記の課題を解決するために、多数の単位電池を直列に接続して構成した電池モジュールにおいて、充放電容量が大幅に劣化した単位電池を簡単な構造によって確実に外部短絡させることにより、電池モジュールが搭載される車両の運行を確保することができる外部短絡システムを提供することである。   An object of the present invention is to solve the above-mentioned problems, and in a battery module configured by connecting a large number of unit cells in series, it is possible to reliably externally short-circuit a unit cell whose charge / discharge capacity has greatly deteriorated with a simple structure. It is providing the external short circuit system which can ensure operation | movement of the vehicle by which a battery module is mounted.

前記した目的を達成するために、本発明に係る電池モジュールの外部短絡システムは、角形のアルカリ系二次電池として構成され直列接続される複数の単位電池と、複数の板状の導電部材とを交互に積層してなる電池積層体と、前記単位電池における、電池積層体の積層方向に互いに対向して設けられた正極集電板と負極集電板との間を短絡させる短絡部材とを備え、前記導電部材に、前記電池積層体の積層方向に直交して延びる係合孔が形成されており、前記短絡部材は、板状の本体部と、該本体部に突設された、前記単位電池を介して隣り合う２つの前記導電部材の各係合孔に係合する係合突起とを有している。   In order to achieve the above-described object, an external short-circuit system for a battery module according to the present invention includes a plurality of unit batteries configured as a square alkaline secondary battery and connected in series, and a plurality of plate-like conductive members. A battery laminate formed by alternately laminating, and a short-circuit member for short-circuiting between the positive electrode current collector plate and the negative electrode current collector plate provided facing each other in the stacking direction of the battery laminate in the unit battery The conductive member is formed with an engagement hole extending perpendicularly to the stacking direction of the battery stack, and the short-circuit member includes a plate-shaped main body and the unit protruding from the main body. It has an engaging protrusion which engages with each engaging hole of the two said electrically-conductive members adjacent via a battery.

この構成によれば、電池モジュールを構成する単位電池間に、係合孔を有する板状の導電部材を介在させ、この導電部材、および、導電部材の係合孔に係合する係合突起を有する外部短絡部材を介して、単位電池を外部短絡させることができる。したがって、簡単な構造の導電部材および外部短絡部材を電池モジュールに追加するのみで、確実に異常な単位電池を外部短絡させて、電池が搭載される車両の運行を確保することができる。しかも、導電部材および外部短絡部材の材質や寸法を変更することで、容易に、電池モジュールが搭載される機器の放電条件に応じた外部短絡システムを構築することが可能となる。また、当該システムは、比較的過充電・過放電に対する安全性の高いニッケル水素二次電池のようなアルカリ系二次電池に適用するので、異常な単位電池を検出したときに応急処置的に１セルのみ外部短絡させても、残りの単位電池に大きな影響を及ぼすことなく、電池モジュールの性能を確保することができる。   According to this configuration, the plate-shaped conductive member having the engagement hole is interposed between the unit cells constituting the battery module, and the engagement protrusion that engages with the conductive member and the engagement hole of the conductive member is provided. The unit battery can be externally short-circuited through the external short-circuit member. Therefore, by simply adding a conductive member and an external short-circuit member having a simple structure to the battery module, an abnormal unit battery can be reliably short-circuited externally to ensure operation of the vehicle on which the battery is mounted. Moreover, by changing the materials and dimensions of the conductive member and the external short-circuit member, it is possible to easily construct an external short-circuit system according to the discharge conditions of the device on which the battery module is mounted. In addition, since the system is applied to an alkaline secondary battery such as a nickel metal hydride secondary battery that has a relatively high safety against overcharge / overdischarge, it is 1 as an emergency measure when an abnormal unit battery is detected. Even if only the cell is externally short-circuited, the performance of the battery module can be ensured without greatly affecting the remaining unit batteries.

本発明に係る上記の外部短絡システムにおいて、前記単位電池の正極集電板および負極集電板が、それぞれ、互いの対向方向に折り曲げられた折り曲げ部を有しており、前記短絡部材は、該短絡部材の本体部が前記正極集電板および負極集電板の各折り曲げ部に直接接触するように前記２つの導電部材に係合されることが好ましい。このように構成して、単位電池に接する導電部材のみならず、単位電池の集電板をも介して外部短絡させることにより、短絡部材と電池積層体との接触面積が増加し、より大きな放電電流にも対応することが可能になる。   In the above external short-circuit system according to the present invention, each of the positive electrode current collector plate and the negative electrode current collector plate of the unit cell has a bent portion that is bent in the opposite direction, and the short-circuit member includes It is preferable that the main body portion of the short-circuit member is engaged with the two conductive members so as to directly contact the bent portions of the positive electrode current collector plate and the negative electrode current collector plate. By constructing in this way, the contact area between the short-circuit member and the battery stack is increased by externally short-circuiting not only through the conductive member in contact with the unit battery, but also through the current collector plate of the unit battery, resulting in greater discharge. It becomes possible to cope with current.

また、本発明に係る上記の外部短絡システムにおいて、前記単位電池の正極集電板および負極集電板が、それぞれ、互いの対向方向に折り曲げられた折り曲げ部を有しており、前記短絡部材は、該短絡部材の本体部が導電性の緩衝部材を介して前記正極集電板および負極集電板の各折り曲げ部に接触するように前記２つの導電部材に係合される構造であってもよい。このように構成すれば、短絡部材の本体部と集電板の各折り曲げ部との間の接触抵抗を低減することができるので、さらに大きな放電電流にも対応することが可能になる。   Further, in the above external short-circuit system according to the present invention, the positive electrode current collector plate and the negative electrode current collector plate of the unit battery each have a bent portion that is bent in the opposing direction, and the short-circuit member is The main body portion of the short-circuit member may be engaged with the two conductive members so as to come into contact with the bent portions of the positive electrode current collector plate and the negative electrode current collector plate via a conductive buffer member. Good. If comprised in this way, since the contact resistance between the main-body part of a short circuit member and each bending part of a current collecting plate can be reduced, it becomes possible to respond to a larger discharge current.

上記外部短絡システムにおいて、前記導電部材の係合孔が、該板状の導電部材の側面に開口して複数形成されており、かつ、前記短絡部材が、複数の前記係合突起と、各係合突起間に形成された複数の切欠とを有しており、これら複数の係合突起および切欠のそれぞれが、前記導電部材の複数の係合孔の１つに対応する位置に設けられていてもよい。短絡部材をこのような構造とすることにより、必要に応じて、複数の係合孔の一部を塞がない状態で短絡部材を導電部材に取り付けるか、あるいは、後述のように複数の短絡部材を重ねて導電部材に取り付けるかを選択することが可能になる。   In the external short-circuit system, a plurality of engagement holes of the conductive member are formed in the side surface of the plate-shaped conductive member, and the short-circuit member includes a plurality of the engagement protrusions and each engagement member. A plurality of notches formed between the mating protrusions, and each of the plurality of engaging protrusions and notches is provided at a position corresponding to one of the plurality of engaging holes of the conductive member. Also good. By setting the short-circuit member in such a structure, if necessary, the short-circuit member is attached to the conductive member in a state where a part of the plurality of engagement holes is not blocked, or a plurality of short-circuit members as described later. It is possible to select whether or not to attach to the conductive member.

上記のように短絡部材に切欠を設けた場合には、当該外部短絡システムが、さらに、前記短絡部材に設けられた切欠を介して前記導電部材の係合孔に係合する係合突起を有し、前記短絡部材に重ねた状態で前記導電部材に取付けられる１つまたは複数の追加の短絡部材を備えることができる。このように構成することにより、短絡部材の電気抵抗を低減して、大電流に対してもより効果的に外部短絡させることが可能になる。   When the notch is provided in the short-circuit member as described above, the external short-circuit system further includes an engagement protrusion that engages with the engagement hole of the conductive member via the notch provided in the short-circuit member. And one or more additional short-circuit members attached to the conductive member in a state of being superimposed on the short-circuit member. By comprising in this way, it becomes possible to reduce the electrical resistance of a short circuit member and to carry out an external short circuit more effectively also to a large current.

上記外部短絡システムにおいて、前記導電部材の係合孔を、該導電部材の厚み方向に直交する方向に貫通する通気孔として形成することが好ましい。このように構成することにより、集電部材を、単位電池を冷却するための放熱板として利用することが可能になる。その結果、電池モジュールにおける単位電池を冷却して、充放電時の電池温度上昇を抑制することにより、単位電池間の容量劣化のばらつきを抑えてより確実に電池モジュールの性能を確保することができる。   In the external short circuit system, the engagement hole of the conductive member is preferably formed as a vent hole penetrating in a direction orthogonal to the thickness direction of the conductive member. By comprising in this way, a current collection member can be utilized as a heat sink for cooling a unit battery. As a result, by cooling the unit battery in the battery module and suppressing the battery temperature rise at the time of charging / discharging, it is possible to more reliably secure the performance of the battery module by suppressing the variation in capacity deterioration between the unit batteries. .

また、上記外部短絡システムにおいては、前記導電部材のすべての係合孔が、前記短絡部材の係合突起によって塞がれるようにしてもよい。ここでの、「すべての係合孔が、前記短絡部材の係合突起によって塞がれる」とは、１つの短絡部材の係合突起による場合のみならず、複数の短絡部材の係合突起によって、集電部材のすべての係合孔が塞がれる場合を含む。本発明に係る外部短絡システムにおける電池モジュールの係合孔は、電池モジュールの充放電に直接関与するものではない。したがって、異常な単位電池発生時における応急的な措置として当該単位電池を外部短絡させる場合には、係合孔が上記のように電池冷却のための通気孔として形成されている場合も含めて、すべての係合孔に係合突起を係合させることにより、短絡部材を確実に集電部材に取り付けることができるとともに、短絡部材と集電部材との間の接触抵抗を低減して、大電流に対してもより効果的に外部短絡させることが可能になる。   In the external short circuit system, all the engagement holes of the conductive member may be blocked by the engagement protrusions of the short circuit member. Here, “all the engagement holes are blocked by the engagement protrusions of the short-circuit member” means not only by the engagement protrusions of one short-circuit member but also by the engagement protrusions of a plurality of short-circuit members. The case where all the engagement holes of the current collecting member are closed is included. The engagement hole of the battery module in the external short circuit system according to the present invention does not directly participate in charging / discharging of the battery module. Therefore, when the unit battery is externally short-circuited as an emergency measure when an abnormal unit battery is generated, including the case where the engagement hole is formed as a ventilation hole for battery cooling as described above, By engaging the engaging protrusions in all the engaging holes, the short-circuit member can be securely attached to the current collecting member, and the contact resistance between the short-circuit member and the current collecting member is reduced, resulting in a large current. It is possible to short-circuit externally more effectively.

前記短絡部材の本体部の厚さと、前記導電部材の係合孔の積層方向の寸法とがほぼ同一であることが好ましい。このように構成することにより、短絡部材を均一な厚さの素材から切り出した後、その係合突起を本体部から折り曲げ加工することで作成できるので、短絡部材を容易かつ安価に製造することができる。   It is preferable that the thickness of the main body portion of the short-circuit member and the dimension in the stacking direction of the engagement holes of the conductive member are substantially the same. By configuring in this way, after the short-circuit member is cut out from the material having a uniform thickness, it can be created by bending the engaging projection from the main body, so that the short-circuit member can be easily and inexpensively manufactured. it can.

以上のように、本発明に係る電池モジュールの外部短絡システムによれば、多数の単位電池を直列に接続して構成した電池モジュールにおいて、充放電容量が大幅に劣化した単位電池を簡単な構造によって確実に外部短絡させることにより、電池モジュールが搭載される車両の運行を確保することができる。   As described above, according to the external short circuit system of the battery module according to the present invention, in a battery module configured by connecting a large number of unit batteries in series, a unit battery having a greatly deteriorated charge / discharge capacity can be obtained with a simple structure. By reliably short-circuiting externally, the operation of the vehicle on which the battery module is mounted can be ensured.

以下、本発明に係る実施形態を図面に従って説明するが、本発明はこの実施形態に限定されるものではない。   Hereinafter, embodiments according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the embodiments.

図１は、本発明の一実施形態に係る外部短絡システムを構成する電池モジュールＢの構造を示す部分破断側面図である。この電池モジュールＢは、例えば、電車に搭載されるものであって、角形電池である単位電池Ｃと板状の導電部材である導電板３とを、厚み方向である前後方向Ｘに交互に積層した電池積層体１を主要な構成要素として備えており、この電池積層体１が、絶縁素材からなるハウジング５によって覆われている。   FIG. 1 is a partially broken side view showing a structure of a battery module B constituting an external short-circuit system according to an embodiment of the present invention. The battery module B is mounted on a train, for example, and is formed by alternately stacking unit batteries C that are rectangular batteries and conductive plates 3 that are plate-like conductive members in the longitudinal direction X that is the thickness direction. The battery stack 1 is provided as a main component, and the battery stack 1 is covered with a housing 5 made of an insulating material.

図２は、図１に示す単位電池Ｃの構造の一例を示す部分破断平面図である。単位電池Ｃは、セパレータ１１と、正極１３および負極１５とを含む電極体１７と、電極体１７を電解液とともに収容する角形形状のケーシング１９とを備えている。ケーシング１９は、絶縁素材からなる矩形の枠形部材２１と、互いに対向して枠形部材２１の二つの開口をそれぞれ覆う、導電素材からなる第１蓋部材２３および第２蓋部材２５とから構成されている。   FIG. 2 is a partially broken plan view showing an example of the structure of the unit battery C shown in FIG. The unit cell C includes a separator 11, an electrode body 17 including a positive electrode 13 and a negative electrode 15, and a rectangular casing 19 that houses the electrode body 17 together with an electrolytic solution. The casing 19 includes a rectangular frame-shaped member 21 made of an insulating material, and a first lid member 23 and a second lid member 25 made of a conductive material that face each other and cover the two openings of the frame-shaped member 21. Has been.

第１蓋部材２３および第２蓋部材２５は、それぞれ、枠形部材２１の両開口を覆う平板状の本体部２３ａ、２５ａを有しており、本体部２３ａ、２５ａの４つの各辺において一体に形成された縁部が、互いの対向方向に、枠形部材２１にほぼ沿うように折り曲げられて、枠形部材２１の外周面の一部を覆う折り曲げ部２３ｂ，２５ｂを形成している。   The first lid member 23 and the second lid member 25 respectively have flat plate-like main body portions 23a and 25a that cover both openings of the frame-shaped member 21, and are integrated with each other on the four sides of the main body portions 23a and 25a. The bent portions 23b and 25b that cover a part of the outer peripheral surface of the frame-shaped member 21 are formed by bending the edge portions formed on the outer peripheral surface of the frame-shaped member 21 in the opposing directions.

電極体１７の構造は、特に限定されないが、例えば、複数の正極１３と複数の負極１５とが、プリーツ状に折り曲げられたセパレータ１１を介して所定の方向に交互に積層されて対向する積層構造を有している。ケーシング１９の第１蓋部材２３および第２蓋部材２５は、ニッケルめっきを施した鋼板で形成されており、正極１３は第１蓋部材２３に、負極１５は第２蓋部材２５に、それぞれ電気的に接続されている。つまり、第１および第２蓋部材２３，２５は、それぞれ、単位電池Ｃの正極集電板および負極集電板を兼ねている。   The structure of the electrode body 17 is not particularly limited. For example, a stacked structure in which a plurality of positive electrodes 13 and a plurality of negative electrodes 15 are alternately stacked in a predetermined direction via separators 11 bent in a pleat shape. have. The first lid member 23 and the second lid member 25 of the casing 19 are made of nickel-plated steel plates. The positive electrode 13 is electrically connected to the first lid member 23, and the negative electrode 15 is electrically connected to the second lid member 25. Connected. That is, the first and second lid members 23 and 25 also serve as the positive electrode current collector plate and the negative electrode current collector plate of the unit battery C, respectively.

また、単位電池Ｃには、単位電池Ｃの電圧を監視するための電圧監視端子３１が設けられている。電圧監視端子３１は、１対、つまり正極側と負極側とに各１つずつ設けてもよいが、電池モジュールＢにおける隣接する単位電池Ｃの正極側と負極側とで、１つの端子３１を共有することが好ましい。   The unit battery C is provided with a voltage monitoring terminal 31 for monitoring the voltage of the unit battery C. The voltage monitoring terminals 31 may be provided in a pair, that is, one each on the positive electrode side and the negative electrode side, but one terminal 31 is provided on the positive electrode side and the negative electrode side of the adjacent unit battery C in the battery module B. It is preferable to share.

次に、単位電池Ｃを用いて構成した電池積層体１の構造について説明する。本実施形態における電池積層体１は、図３に示すように、複数の単位電池Ｃと導電板３とを交互に積層したものである。単位電池Ｃは、導電板３を介して隣接する単位電池Ｃの一方の第１蓋部材２３と、他方の第２蓋部材２５とが互いに対向する方向に積層されている。   Next, the structure of the battery laminated body 1 comprised using the unit battery C is demonstrated. As shown in FIG. 3, the battery stack 1 in the present embodiment is obtained by alternately stacking a plurality of unit batteries C and conductive plates 3. In the unit cell C, one first lid member 23 and the other second lid member 25 of the unit cells C adjacent to each other via the conductive plate 3 are stacked in a direction facing each other.

導電板３は、隣接する単位電池Ｃの一方の正極集電体である第１蓋部材２３と、他方の負極集電体である第２蓋部材２５との間に介在するので、これら２つの単位電池Ｃを電気的に直列に接続するべく、電気伝導性を有する素材で形成されている。この点において、アルミニウムは電気抵抗が比較的低く、熱伝導率が比較的大きいので、導電板３を形成する素材として好ましい特性を有している。しかしながら、アルミニウムは酸化しやすく、接触抵抗が増大しやすいので、アルミニウム板にニッケルメッキを施すことにより、接触抵抗の低減を図っている。   Since the conductive plate 3 is interposed between the first lid member 23 that is one positive electrode current collector of the adjacent unit battery C and the second lid member 25 that is the other negative electrode current collector, In order to electrically connect the unit cells C in series, the unit cells C are formed of a material having electrical conductivity. In this respect, since aluminum has a relatively low electrical resistance and a relatively high thermal conductivity, aluminum has preferable characteristics as a material for forming the conductive plate 3. However, since aluminum easily oxidizes and contact resistance tends to increase, the contact resistance is reduced by applying nickel plating to the aluminum plate.

電池積層体１を示す平面図である図３（ａ）に示すように、導電板３には、４つの側面３ａの一つである上側面または上側面と下側面の両方に開口して、複数のほぼ矩形の断面形状を有する係合孔３ｂが形成されている。これら複数の係合孔３ｂは、複数の係合孔３ｂが形成する、左右方向Ｙに延びた係合孔列Ｌの当該列方向の位置が、単位電池Ｃの電圧監視端子３１の係合孔列Ｌ方向の位置と重ならないように配置されている。   As shown in FIG. 3A, which is a plan view showing the battery stack 1, the conductive plate 3 has an opening on one of the four side surfaces 3 a or both the upper side surface and the lower side surface, A plurality of engagement holes 3b having a substantially rectangular cross-sectional shape are formed. The plurality of engagement holes 3b are formed by a plurality of engagement holes 3b and the positions in the row direction of the engagement hole row L extending in the left-right direction Y are the engagement holes of the voltage monitoring terminal 31 of the unit battery C. It arrange | positions so that it may not overlap with the position of the row | line | column L direction.

また、電池積層体１の側面図である図３（ｂ）に示すように、各導電板３の係合孔３ｂは、電池積層体１の積層方向Ｘに直交する上下方向に延びる孔として形成されている。さらに、複数の導電板３のうち、積層方向Ｘの両端に位置する導電板３，３を除く導電板３の各係合孔３ｂは、導電板３を積層方向Ｘと直交する方向に貫通する通気孔３ｂＢとして形成されている。電池モジュールＢに設けられた図示しない電動ファンから送られた冷却空気を、通気孔３ｂを通過させることにより、通気孔３ｂＢが設けられた導電板３は、その両側に位置する単位電池Ｃを冷却する放熱板として機能する。一方、積層方向Ｘの両端に位置する導電板３，３は、それぞれ、電池積層体１全体の、正極側および負極側の集電板として機能する。   Further, as shown in FIG. 3B, which is a side view of the battery stack 1, the engagement holes 3 b of the conductive plates 3 are formed as holes extending in the vertical direction perpendicular to the stacking direction X of the battery stack 1. Has been. Further, among the plurality of conductive plates 3, each engagement hole 3 b of the conductive plate 3 excluding the conductive plates 3 and 3 positioned at both ends in the stacking direction X penetrates the conductive plate 3 in a direction orthogonal to the stacking direction X. It is formed as a vent 3bB. By passing cooling air sent from an electric fan (not shown) provided in the battery module B through the air vent 3b, the conductive plate 3 provided with the air vent 3bB cools the unit cells C located on both sides thereof. It functions as a heat sink. On the other hand, the conductive plates 3 and 3 positioned at both ends in the stacking direction X function as current collector plates on the positive electrode side and the negative electrode side of the entire battery stack 1, respectively.

次に、本実施形態に係る外部短絡システムの主要な構成要素の一つである、短絡部材について説明する。図４は、本実施形態で使用する短絡部材の一例を示す斜視図である。この短絡部材５１は、板状の本体部５１ａに複数の係合突起５１ｂを突設して構成したものである。本体部５１ａは直方体形状であり、係合突起５１ｂは横断面四角形の角柱状である。図５は、本実施形態に係る外部短絡システムＳの主要部である、１つの単位電池Ｃおよびその両隣に位置する集電板３，３からなるユニットに、短絡部材５１を取り付けた状態を示す。正面図である図５（ａ）に示すように、各係合突起５１ｂは、導電板３の係合孔３ｂに係合するように、位置および形状が設定される。また、短絡部材５１は導電性の素材で形成されており、側面図である図５（ｂ）に示すように、各係合突起５１ｂが、単位電池Ｃを介して隣り合う２つの導電板３，３の係合孔３ｂに係合することによって、単位電池Ｃの正極集電体である第１蓋部材２３と負極集電体である第２蓋部材２５との間が短絡される。   Next, a short-circuit member that is one of the main components of the external short-circuit system according to the present embodiment will be described. FIG. 4 is a perspective view showing an example of a short-circuit member used in the present embodiment. The short-circuit member 51 is configured by projecting a plurality of engaging protrusions 51b on a plate-like main body 51a. The main body 51a has a rectangular parallelepiped shape, and the engagement protrusion 51b has a rectangular column shape with a rectangular cross section. FIG. 5 shows a state in which the short-circuit member 51 is attached to a unit composed of one unit battery C and current collector plates 3 and 3 located on both sides thereof, which is a main part of the external short-circuit system S according to this embodiment. . As shown in FIG. 5A, which is a front view, the position and shape of each engagement protrusion 51 b are set so as to engage with the engagement hole 3 b of the conductive plate 3. Further, the short-circuit member 51 is formed of a conductive material, and as shown in FIG. 5B which is a side view, each engagement protrusion 51b is adjacent to two conductive plates 3 with the unit battery C interposed therebetween. , 3 are engaged with each other, the first lid member 23 that is the positive electrode current collector of the unit battery C and the second lid member 25 that is the negative electrode current collector are short-circuited.

単位電池Ｃの第１蓋部材２３と第２蓋部材２５との間の短絡は、２つの導電板３，３のみを介して行ってもよいが、本実施形態では、図５（ｂ）に示すように、短絡部材５１の本体部５１ａの下面が、第１および第２蓋部材２３，２５の各折り曲げ部２３ｂ，２５ｂの両方の上面に直接接触している。   The short circuit between the first lid member 23 and the second lid member 25 of the unit battery C may be performed only through the two conductive plates 3 and 3, but in this embodiment, FIG. As shown, the lower surface of the main body 51 a of the short-circuit member 51 is in direct contact with the upper surfaces of both the bent portions 23 b and 25 b of the first and second lid members 23 and 25.

あるいは、図６に示すように、短絡部材５１の本体部５１ａと、単位電池Ｃの第１蓋部材２３および第２蓋部材２５との間に導電性の緩衝部材５３を介在させてもよい。導電性緩衝部材５３として、本実施形態では、ニッケル製の金属綿を用いているが、そのほかにも、導電性樹脂、導電性ペーストなどを使用することができる。   Alternatively, as shown in FIG. 6, a conductive buffer member 53 may be interposed between the main body 51 a of the short-circuit member 51 and the first lid member 23 and the second lid member 25 of the unit battery C. In the present embodiment, nickel metal cotton is used as the conductive buffer member 53, but in addition to this, a conductive resin, a conductive paste, or the like can be used.

なお、本実施形態における外部短絡システムでは、図５（ｂ）に示す、短絡部材５１として、本体部５１ａの厚さｔ１を、導電板３の係合孔３ｂの積層方向Ｘ寸法ｌとほぼ同一としたものを使用している。この場合、短絡部材５１を、均一な厚さの素材から切り出した後、その係合突起５１ｂを、本体部５１ａから折り曲げることによって作成しても、係合突起５１ｂの積層方向Ｘの寸法ｔ２を、係合孔３ｂの積層方向Ｘ寸法ｌにほぼ一致させることができる。したがって、短絡部材５１を容易かつ安価に製造することができる。   In the external short-circuit system in the present embodiment, as the short-circuit member 51 shown in FIG. 5B, the thickness t1 of the main body 51a is substantially the same as the dimension X in the stacking direction X of the engagement holes 3b of the conductive plate 3. I am using what I did. In this case, even if the short-circuit member 51 is cut out from a material having a uniform thickness and then the engagement protrusion 51b is formed by bending from the main body 51a, the dimension t2 of the engagement protrusion 51b in the stacking direction X is set. The engagement hole 3b can be made to substantially coincide with the stacking direction X dimension l. Therefore, the short-circuit member 51 can be manufactured easily and inexpensively.

次に、本発明の他の実施形態に係る外部短絡システムについて説明する。この実施形態は、図１〜６とともに説明した上記実施形態において、短絡部材５１の構造を変更したものであり、その他の構成に関しては図１〜６に示した実施形態と同様である。   Next, an external short-circuit system according to another embodiment of the present invention will be described. In this embodiment, the structure of the short-circuit member 51 is changed in the above-described embodiment described with reference to FIGS. 1 to 6, and the other configurations are the same as those in the embodiment shown in FIGS.

本実施形態で用いられる短絡部材５１は、図７に示すように、本体部５１ａに突設された複数の係合突起５１ｂ間に切欠５１ｃを有している。各切欠５１ｃは、本体部５１ａを厚み方向に貫通する溝として形成されており、図８に示すように、短絡部材５１を導電板３に取り付けた際に、導電板３の複数の係合孔３ｂのうちのいずれか一つに対応する位置に配置されている。各切欠５１ｃの横断面寸法は、導電板３の係合孔３ｂの断面寸法とほぼ同一か、それよりも大きく設定されている。   As shown in FIG. 7, the short-circuit member 51 used in the present embodiment has a notch 51 c between a plurality of engaging protrusions 51 b that protrude from the main body 51 a. Each notch 51c is formed as a groove penetrating through the main body 51a in the thickness direction. When the short-circuit member 51 is attached to the conductive plate 3, as shown in FIG. It is arranged at a position corresponding to any one of 3b. The cross-sectional dimension of each notch 51 c is set to be substantially the same as or larger than the cross-sectional dimension of the engagement hole 3 b of the conductive plate 3.

上述のように、導電板３は、係合孔３ｂを冷却空気の通気孔として利用することにより、単位電池Ｃを冷却する放熱板としても機能するが、異常の発生した単位電池Ｃやその隣に位置する単位電池Ｃに対して、この放熱板としての機能をある程度維持したい場合、切欠５１ｃを設けることにより、複数の通気孔３ｂ一部を短絡部材５１によって塞がないようにして開放する。   As described above, the conductive plate 3 functions as a heat radiating plate for cooling the unit cell C by using the engagement hole 3b as a cooling air vent. When it is desired to maintain the function as a heat sink to some extent for the unit battery C positioned at the position C, a part of the plurality of vent holes 3b is opened without being blocked by the short-circuit member 51 by providing the notch 51c.

また、異常が発生した単位電池Ｃの冷却よりも、外部短絡電流量の確保を優先したい場合には、図９に示すように、導電板３に直接取付けられる第１の短絡部材５１Ａに追加して、第２の短絡部材５１Ｂを、第１短絡部材５１Ａに重ねた状態で導電板３に取付けることができる。つまり、導電板３の係合孔３ｂに対応する位置に配置されている第１短絡部材５１Ａの切欠５１Ａｃを介して、追加の第２短絡部材５１Ｂの各係合突起５１Ｂｂを、導電板３の係合孔３ｂに係合させることができる。この状態で、第２短絡部材５１Ｂは、本体部５１Ｂａが第１短絡部材５１Ａの本体部５１Ａａ上に接触することにより、位置および姿勢が安定する。なお、第１短絡部材５１Ａに重ねた状態で導電板３に係合させる追加の短絡部材５１Ｂの数は、１つに限らず、複数であってもよい。   In addition, when priority is given to securing the amount of external short circuit current over cooling of the unit battery C in which an abnormality has occurred, it is added to the first short circuit member 51A directly attached to the conductive plate 3, as shown in FIG. Thus, the second short-circuit member 51B can be attached to the conductive plate 3 in a state of being superimposed on the first short-circuit member 51A. That is, the engagement protrusions 51 </ b> Bb of the additional second short-circuit member 51 </ b> B are connected to the conductive plate 3 via the notches 51 </ b> Ac of the first short-circuit member 51 </ b> A disposed at a position corresponding to the engagement hole 3 b of the conductive plate 3. It can be engaged with the engagement hole 3b. In this state, the position and posture of the second short-circuit member 51B are stabilized when the main body portion 51Ba comes into contact with the main body portion 51Aa of the first short-circuit member 51A. Note that the number of additional short-circuit members 51B that are engaged with the conductive plate 3 while being superimposed on the first short-circuit member 51A is not limited to one, and may be plural.

次に、上記で説明した本発明の各実施形態に係る外部短絡システムの動作について説明する。   Next, the operation of the external short-circuit system according to each embodiment of the present invention described above will be described.

図１に示す電池モジュールＢにおいて、電池積層体１を構成する単位電池Ｃのいずれかに、過充電や過放電などの電池電圧異常が検知された場合、ハウジング５の上部を取り外した後、図５に示すように、異常が検出された単位電池Ｃの両隣に配置された２つの導電板３，３の各係合孔３ｂ、３ｂに、短絡部材５１の係合突起５１ｂを導電部材に係合させる。このとき、短絡部材５１の本体部５１ａが、単位電池Ｃの第１および第２蓋部材２３，２５の各折り曲げ部２３ｂ，２５ｂに接触する位置まで短絡部材５１を押し込む。あるいは、図６に示すように、本体部５１ａと折り曲げ部２３ｂ，２５ｂとの間に、導電性緩衝部材５３を介在させて、短絡部材５１の本体部５１ａと導電性緩衝部材５３、および導電性緩衝材５３と単位電池Ｃの折り曲げ部２３ｂ，２５ｂとが、それぞれ十分に接触する位置まで短絡部材５１を押し込む。   In the battery module B shown in FIG. 1, when a battery voltage abnormality such as overcharge or overdischarge is detected in any of the unit batteries C constituting the battery stack 1, the upper part of the housing 5 is removed, 5, the engagement protrusions 51b of the short-circuit member 51 are engaged with the conductive members in the engagement holes 3b and 3b of the two conductive plates 3 and 3 disposed on both sides of the unit battery C in which an abnormality is detected. Combine. At this time, the main body 51a of the short-circuit member 51 pushes the short-circuit member 51 to a position where it contacts the bent portions 23b and 25b of the first and second lid members 23 and 25 of the unit battery C. Alternatively, as shown in FIG. 6, a conductive buffer member 53 is interposed between the main body 51 a and the bent portions 23 b and 25 b, so that the main body 51 a and the conductive buffer member 53 of the short-circuit member 51 and the conductive The buffer member 53 and the bent portions 23b and 25b of the unit battery C push the short-circuit member 51 to a position where they sufficiently contact each other.

本実施形態においては、このように、簡単な構造の導電板３および短絡部材５１を電池モジュールＢに追加するのみで、確実に異常な単位電池Ｃを外部短絡させて、電池モジュールＢが搭載される機器の動作を確保することができる。しかも、導電板３および外部短絡部材５１の材質や寸法を変更することで、容易に、電池モジュールＢが搭載される機器の放電条件に応じた外部短絡システムを構築することが可能となる。   In the present embodiment, the battery module B is mounted by reliably short-circuiting the abnormal unit battery C by simply adding the conductive plate 3 and the short-circuit member 51 having a simple structure to the battery module B as described above. The operation of the device can be ensured. In addition, by changing the materials and dimensions of the conductive plate 3 and the external short-circuit member 51, it is possible to easily construct an external short-circuit system according to the discharge conditions of the device on which the battery module B is mounted.

さらには、短絡部材５１を、直接、または導電性緩衝部材５３を介して、単位電池Ｃの正極および負極集電板として機能する第１および第２蓋部材２３，２５に接触させるので、単位電池Ｃに接する導電板３のみならず、単位電池Ｃの集電板をも介して外部短絡させることにより、短絡部材５１と単位電池Ｃとの接触面積が増加し、より大きな放電電流にも対応することが可能になる。   Furthermore, since the short-circuit member 51 is brought into contact with the first and second lid members 23 and 25 that function as the positive and negative current collectors of the unit battery C directly or via the conductive buffer member 53, the unit battery By externally short-circuiting not only through the conductive plate 3 in contact with C but also through the current collector plate of the unit battery C, the contact area between the short-circuit member 51 and the unit battery C increases, and a larger discharge current can be accommodated. It becomes possible.

また、本発明に係る他の実施形態においては、図７に示すように、本体部５１ａに厚み方向に延びる切欠５１ｃを有する短絡部材５１を用いている。図８に示すように、導電板３の係合孔３ｂを冷却空気の通気孔として利用して、単位電池Ｃを冷却する放熱板として機能させる場合において、本実施形態における短絡部材５１を単独で使用すれば、導電板３の複数の係合孔３ｂの一部が短絡部材５１によって塞がれることなく、放熱板としての機能を維持することができる。   Moreover, in other embodiment which concerns on this invention, as shown in FIG. 7, the short circuit member 51 which has the notch 51c extended in the thickness direction at the main-body part 51a is used. As shown in FIG. 8, when the engagement hole 3 b of the conductive plate 3 is used as a cooling air ventilation hole to function as a heat radiating plate for cooling the unit battery C, the short-circuit member 51 in this embodiment is used alone. If used, a part of the plurality of engagement holes 3 b of the conductive plate 3 is not blocked by the short-circuit member 51, and the function as a heat sink can be maintained.

また、異常が発生した単位電池Ｃの冷却よりも、外部短絡電流量の確保を優先したい場合には、図９に示すように、導電板３に直接取付けられる第１の短絡部材５１Ａに追加して、第２の短絡部材５１Ｂを、第１短絡部材５１Ａに重ねた状態で導電板３に取付けることにより、短絡部材全体としての電気抵抗を低減して、大きな放電電流にも対応することが可能になる。   In addition, when priority is given to securing the amount of external short circuit current over cooling of the unit battery C in which an abnormality has occurred, it is added to the first short circuit member 51A directly attached to the conductive plate 3, as shown in FIG. Thus, by attaching the second short-circuit member 51B to the conductive plate 3 in a state of being superimposed on the first short-circuit member 51A, it is possible to reduce the electrical resistance of the entire short-circuit member and cope with a large discharge current. become.

また、上記いずれの実施形態においても、導電部材３のすべての係合孔３ｂが、短絡部材５１（または第１および第２短絡部材５１Ａ，５１Ｂ）の各係合突起５１ｂによって塞がれるようにすることができる。電池モジュールＢの係合孔３ｂは、電池モジュールＢの充放電に直接関与するものではない。したがって、係合孔３ｂが上記のように電池冷却のための通気孔として形成されている場合も含めて、単位電池Ｃに異常が発生した場合における応急的な措置としてこの単位電池Ｃを外部短絡させる場合には、すべての係合孔３ｂに係合突起を係合させることにより、短絡部材５１を確実に集電板３に取り付けることができるとともに、短絡部材５１と集電板３との間の接触抵抗を低減して、大電流に対してもより効果的に外部短絡させることが可能になる。   In any of the above embodiments, all the engagement holes 3b of the conductive member 3 are closed by the respective engagement protrusions 51b of the short-circuit member 51 (or the first and second short-circuit members 51A and 51B). can do. The engagement hole 3b of the battery module B does not directly participate in charging / discharging of the battery module B. Accordingly, the unit battery C is externally short-circuited as an emergency measure when an abnormality occurs in the unit battery C, including the case where the engagement hole 3b is formed as a ventilation hole for battery cooling as described above. In the case of making it, the shorting member 51 can be securely attached to the current collecting plate 3 by engaging the engaging projections with all the engaging holes 3 b, and between the shorting member 51 and the current collecting plate 3. The contact resistance can be reduced, and external short-circuiting can be more effectively performed even for a large current.

なお、導電板３に形成する係合孔３ｂの数および形状は、上記で説明したものに限定されず、電池モジュールＢが使用される機器の用途や仕様に応じて適宜変更してよい。さらには、短絡部材５１の係合突起５１ｂおよび切欠５１ｃの数および形状も、係合孔３ｂの数および形状に合わせて変更することができる。   Note that the number and shape of the engagement holes 3b formed in the conductive plate 3 are not limited to those described above, and may be appropriately changed according to the application and specifications of the device in which the battery module B is used. Furthermore, the number and shape of the engagement protrusions 51b and the notches 51c of the short-circuit member 51 can also be changed according to the number and shape of the engagement holes 3b.

以上のとおり、図面を参照しながら本発明の好適な実施形態を説明したが、本発明の趣旨を逸脱しない範囲内で、種々の追加、変更または削除が可能である。したがって、そのようなものも本発明の範囲内に含まれる。   As described above, the preferred embodiments of the present invention have been described with reference to the drawings, but various additions, modifications, or deletions can be made without departing from the spirit of the present invention. Therefore, such a thing is also included in the scope of the present invention.

本発明の一実施形態に係る外部短絡システムにおける電池モジュールを示す部分破断側面図である。It is a partially broken side view which shows the battery module in the external short circuit system which concerns on one Embodiment of this invention. 図１の電池モジュールにおける単位電池示す部分破断平面図である。FIG. 2 is a partially broken plan view showing a unit battery in the battery module of FIG. 1. 図１の電池モジュールにおける電池積層体を示す概略構成図であり、（ａ）は電池積層体の平面図、（ｂ）は電池積層体の側面図である。It is a schematic block diagram which shows the battery laminated body in the battery module of FIG. 1, (a) is a top view of a battery laminated body, (b) is a side view of a battery laminated body. 本発明の一実施形態に係る外部短絡システムにおける短絡部材を示す斜視図である。It is a perspective view which shows the short circuit member in the external short circuit system which concerns on one Embodiment of this invention. 本実施形態に係る外部短絡システムの主要部を示す図であり、（ａ）は、図４の短絡部材を導電板に取り付けた状態を示す正面図、（ｂ）はその側面図である。It is a figure which shows the principal part of the external short circuit system which concerns on this embodiment, (a) is a front view which shows the state which attached the short circuit member of FIG. 4 to the electrically-conductive board, (b) is the side view. 図４の短絡部材を導電板に取り付ける構造の変形例を示す側面図である。It is a side view which shows the modification of the structure which attaches the short circuit member of FIG. 4 to a conductive plate. 本発明の他の実施形態に係る外部短絡システムにおける短絡部材を示す斜視図である。It is a perspective view which shows the short circuit member in the external short circuit system which concerns on other embodiment of this invention. 図７の短絡部材を導電板に取り付けた状態を示す正面図である。It is a front view which shows the state which attached the short circuit member of FIG. 7 to the electrically-conductive board. 図７の短絡部材を２つ重ねて導電板に取り付けた状態を示す正面図である。It is a front view which shows the state which piled up the two short circuit members of FIG. 7, and was attached to the electrically-conductive board.

符号の説明Explanation of symbols

１ 電池積層体
３ 導電板（導電部材）
３ｂ 係合孔
２３ 第１蓋部材（正極集電板）
２５ 第２蓋部材（負極集電板）
５１ 短絡部材
５１ａ 本体部
５１ｂ 係合突起
Ｃ 単位電池
Ｂ 電池モジュール
Ｓ 外部短絡システム 1 battery stack 3 conductive plate (conductive member)
3b Engagement hole 23 1st cover member (positive electrode current collecting plate)
25 Second lid member (negative current collector)
51 Short-circuit member 51a Main body 51b Engagement protrusion C Unit battery B Battery module S External short-circuit system

Claims (8)

角形のアルカリ系二次電池として構成され直列接続される複数の単位電池と、複数の板状の導電部材とを交互に積層してなる電池積層体と、前記単位電池における、電池積層体の積層方向に互いに対向して設けられた正極集電板と負極集電板との間を短絡させる短絡部材とを備え、
前記導電部材に、前記電池積層体の積層方向に直交して延びる係合孔が形成されており、
前記短絡部材は、板状の本体部と、該本体部に突設された、前記単位電池を介して隣り合う２つの前記導電部材の各係合孔に係合する係合突起とを有する、
電池モジュールの外部短絡システム。 A battery stack formed by alternately stacking a plurality of unit batteries configured as a prismatic alkaline secondary battery and connected in series, and a plurality of plate-like conductive members, and a stack of battery stacks in the unit battery A short-circuit member for short-circuiting between the positive electrode current collector plate and the negative electrode current collector plate provided to face each other in the direction,
The conductive member is formed with an engagement hole extending perpendicular to the stacking direction of the battery stack,
The short-circuit member has a plate-shaped main body portion, and an engagement protrusion that is provided on the main body portion and engages with each engagement hole of the two conductive members adjacent to each other via the unit battery.
Battery module external short circuit system. 請求項１において、前記単位電池の正極集電板および負極集電板が、それぞれ、互いの対向方向に折り曲げられた折り曲げ部を有しており、前記短絡部材は、該短絡部材の本体部が前記正極集電板および負極集電板の各折り曲げ部に直接接触するように前記２つの導電部材に係合される電池モジュールの外部短絡システム。   In Claim 1, each of the positive electrode current collector plate and the negative electrode current collector plate of the unit battery has a bent portion that is bent in a direction opposite to each other, and the short-circuit member includes a main body portion of the short-circuit member. An external short-circuit system for a battery module that is engaged with the two conductive members so as to be in direct contact with the bent portions of the positive current collector and the negative current collector. 請求項１において、前記単位電池の正極集電板および負極集電板が、それぞれ、互いの対向方向に折り曲げられた折り曲げ部を有しており、前記短絡部材は、該短絡部材の本体部が導電性の緩衝部材を介して前記正極集電板および負極集電板の各折り曲げ部に接触するように前記２つの導電部材に係合される電池モジュールの外部短絡システム。   In Claim 1, each of the positive electrode current collector plate and the negative electrode current collector plate of the unit battery has a bent portion that is bent in a direction opposite to each other, and the short-circuit member includes a main body portion of the short-circuit member. An external short-circuit system for a battery module that is engaged with the two conductive members so as to come into contact with the bent portions of the positive electrode current collector plate and the negative electrode current collector plate via a conductive buffer member. 請求項１から３のいずれか一項において、前記導電部材の係合孔が、該板状の導電部材の側面に開口して複数形成されており、かつ、前記短絡部材が、複数の前記係合突起と、各係合突起間に形成された複数の切欠とを有しており、これら複数の係合突起および切欠のそれぞれが、前記導電部材の複数の係合孔の１つに対応する位置に設けられている電池モジュールの外部短絡システム。   4. The engagement hole of the conductive member according to claim 1, wherein a plurality of engagement holes of the conductive member are formed in a side surface of the plate-like conductive member, and the short-circuit member includes a plurality of the engagement members. And a plurality of notches formed between the engaging protrusions. Each of the plurality of engaging protrusions and the notches corresponds to one of the plurality of engaging holes of the conductive member. An external short-circuit system for the battery module provided at the position. 請求項４において、さらに、前記短絡部材に設けられた切欠を介して前記導電部材の係合孔に係合する係合突起を有し、前記短絡部材に重ねた状態で前記導電部材に取付けられる１つまたは複数の追加の短絡部材を備える電池モジュールの外部短絡システム。   5. The apparatus according to claim 4, further comprising an engagement protrusion that engages with an engagement hole of the conductive member through a notch provided in the short-circuit member, and is attached to the conductive member in a state of being superimposed on the short-circuit member. A battery module external short circuit system comprising one or more additional short circuit members. 請求項１から５のいずれか一項において、前記導電部材の係合孔が、該導電部材の厚み方向に直交する方向に貫通する通気孔として形成されている電池モジュールの外部短絡システム。   The battery module external short-circuit system according to any one of claims 1 to 5, wherein the engagement hole of the conductive member is formed as a vent hole penetrating in a direction orthogonal to a thickness direction of the conductive member. 請求項１から６のいずれか一項において、前記導電部材のすべての係合孔が、前記短絡部材の係合突起によって塞がれる電池モジュールの外部短絡システム。   The battery module external short-circuit system according to claim 1, wherein all the engagement holes of the conductive member are closed by the engagement protrusions of the short-circuit member. 請求項１から７のいずれか一項において、前記短絡部材の本体部の厚さと、前記導電部材の係合孔の積層方向の寸法とがほぼ同一である電池モジュールの外部短絡システム。   8. The external short circuit system for a battery module according to claim 1, wherein the thickness of the main body of the short circuit member and the dimension of the engagement hole of the conductive member in the stacking direction are substantially the same.
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