JP2014232633A - Bus bar module and power unit - Google Patents

Bus bar module and power unit Download PDF

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JP2014232633A
JP2014232633A JP2013112722A JP2013112722A JP2014232633A JP 2014232633 A JP2014232633 A JP 2014232633A JP 2013112722 A JP2013112722 A JP 2013112722A JP 2013112722 A JP2013112722 A JP 2013112722A JP 2014232633 A JP2014232633 A JP 2014232633A
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bus bar
peripheral wall
bus
arm
batteries
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JP6145314B2 (en
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晃三 古庄
Kozo Furusho
晃三 古庄
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Yazaki Corp
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Yazaki Corp
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Priority to JP2013112722A priority Critical patent/JP6145314B2/en
Priority to PCT/JP2014/063922 priority patent/WO2014192720A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H01M50/51—Connection only in series
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

PROBLEM TO BE SOLVED: To provide a bus bar module which improves workability in assembling the bus bar module to a plurality of batteries, and a power unit.SOLUTION: A bus bar module 1 comprises: a plurality of bus bars 3 connecting a plurality of batteries in series; and a case 4 housing the plurality of bus bars. The case includes a plurality of housing parts 5 housing the bus bars, and each of the housing parts includes a surrounding wall 6 erected in a thickness direction of a bus bar for enclosing the bus bar. At least one of the bus bar and the surrounding wall of the housing part includes an elastic part 8 which is provided so as to be freely elastically deformed in a direction of surface extension of the bus bar. At least a pair of elastic parts are provided at positions opposing each other, hold the bus bar therebetween in a freely movable manner in the direction of surface extension, and are interposed between the surrounding wall and the bus bar to locate the bus bar at a position away from the surrounding wall.

Description

本発明は、バスバモジュール及び電源装置に係り、特に、複数の電池を直列に接続するためのバスバモジュールと、当該バスバモジュールを有する電源装置に関する。   The present invention relates to a bus bar module and a power supply device, and more particularly to a bus bar module for connecting a plurality of batteries in series and a power supply device having the bus bar module.

例えば、電動モータを用いて走行する電気自動車や、エンジンと電動モータとを併用して走行するハイブリット自動車などには、前記電動モータの駆動源としての電池モジュール１００が搭載されている。この電池モジュール１００は、電極端子１２１Ａを備えた複数の単電池１２１が並べて配された単電池群１２０を有する。複数の電極端子１２１Ａ間は、電池配線モジュール１０１によって電気的に接続されている。   For example, a battery module 100 as a drive source of the electric motor is mounted on an electric vehicle that travels using an electric motor, a hybrid vehicle that travels using both an engine and an electric motor, and the like. The battery module 100 includes a unit cell group 120 in which a plurality of unit cells 121 including electrode terminals 121A are arranged side by side. The plurality of electrode terminals 121 </ b> A are electrically connected by the battery wiring module 101.

電池配線モジュール１０１は、左右方向（単電池群１２０における単電池１２１の並び方向）に連結された複数の連結ユニット１０２を備える。各連結ユニット１０２は、複数の単電池１２１のうち、一の単電池１２１の電極端子１２１Ａと、一の単電池に隣り合う他の単電池１２１の電極端子１２１Ａとを接続するバスバ１０３を有する。バスバ１０３には、電極端子１２１Ａが挿通される一対の端子貫通孔（図示しない）が、バスバ１０３を貫通して形成されている。バスバ１０３に形成された一対の端子貫通孔は、複数の単電池１２１の並び方向に細長く延びて形成されている。   The battery wiring module 101 includes a plurality of connection units 102 connected in the left-right direction (the arrangement direction of the single cells 121 in the single cell group 120). Each connecting unit 102 has a bus bar 103 that connects the electrode terminal 121A of one unit cell 121 and the electrode terminal 121A of another unit cell 121 adjacent to the one unit cell among the plurality of unit cells 121. The bus bar 103 is formed with a pair of terminal through holes (not shown) through which the electrode terminals 121 </ b> A are inserted so as to penetrate the bus bar 103. A pair of terminal through-holes formed in the bus bar 103 is formed to be elongated in the direction in which the plurality of unit cells 121 are arranged.

各連結ユニット１０２は、バスバ１０３が収容される合成樹脂製のバスバ収容部１０４を備える。バスバ収容部１０４は上方から見て略長方形状をなしており、バスバ１０３よりもやや大きな形状とされている。   Each connecting unit 102 includes a synthetic resin bus bar accommodating portion 104 in which the bus bar 103 is accommodated. The bus bar accommodating portion 104 has a substantially rectangular shape when viewed from above, and is slightly larger than the bus bar 103.

このような電池モジュール１００の各単電池１２１の電極端子１２１Ａとバスバ１０３とを接続する際には、電極端子１２１Ａがバスバ１０３の端子貫通孔内に貫通された状態でナットＮが螺合されて、ナットＮと単電池１２１の上面との間にバスバ１０３が挟まれることにより、電極端子１２１Ａとバスバ１０３とが電気的に接続される。   When connecting the electrode terminal 121 </ b> A of each unit cell 121 of the battery module 100 and the bus bar 103, the nut N is screwed with the electrode terminal 121 </ b> A penetrating into the terminal through hole of the bus bar 103. When the bus bar 103 is sandwiched between the nut N and the upper surface of the unit cell 121, the electrode terminal 121A and the bus bar 103 are electrically connected.

この際、電極端子１２１Ａの形成位置が、各単電池１２１の製造公差や、並べられた複数の単電池１２１の組付け公差によって、電極端子１２１Ａ間のピッチにずれが生じる場合があったとしても、バスバ１０３に形成された一対の端子貫通孔が、複数の単電池１２１の並び方向に細長く延びて形成されているので、一対の端子貫通孔が、電極端子１２１Ａ間のピッチのずれを吸収することで、電極端子１２１Ａとバスバ１０３とが電気的に接続されていた。   At this time, even if the formation position of the electrode terminals 121 </ b> A may be shifted in the pitch between the electrode terminals 121 </ b> A due to the manufacturing tolerance of each unit cell 121 or the assembly tolerance of the plurality of arranged unit cells 121. The pair of terminal through holes formed in the bus bar 103 are formed so as to be elongated in the direction in which the plurality of single cells 121 are arranged, so that the pair of terminal through holes absorb the pitch deviation between the electrode terminals 121A. Thus, the electrode terminal 121A and the bus bar 103 were electrically connected.

特開２０１３−３３７１０号公報JP 2013-33710 A

しかしながら、従来の電池配線モジュール１０１は、バスバ収容部１０４が上方から見て略長方形状をなしており、バスバ１０３よりもやや大きな形状とされていたから、バスバ１０３がバスバ収容部１０４に収容された状態で、例えば、電池配線モジュール１０１が傾けられた際には、バスバ１０３がバスバ収容部１０４の片側に寄せられてしまうことがあった。バスバ１０３が片側に寄せられた状態の電池配線モジュール１０１を単電池群１２０に組み付ける際には、バスバ１０３の端子貫通孔を、単電池群１２０の電極端子１２１Ａに挿入させるように、バスバ１０３を一つずつ単電池群１２０の電極端子１２１Ａの形成位置に合わせて移動させなければならず手間がかかって面倒だった。このため、電池配線モジュール１０１の単電池群１２０への組付け作業性が悪かった。   However, in the conventional battery wiring module 101, the bus bar housing part 104 has a substantially rectangular shape when viewed from above, and is slightly larger than the bus bar 103. Therefore, the bus bar 103 is housed in the bus bar housing part 104. Thus, for example, when the battery wiring module 101 is tilted, the bus bar 103 may be moved to one side of the bus bar housing portion 104. When assembling the battery wiring module 101 with the bus bar 103 close to one side to the unit cell group 120, the bus bar 103 is inserted so that the terminal through hole of the bus bar 103 is inserted into the electrode terminal 121A of the unit cell group 120. It must be moved one by one in accordance with the position where the electrode terminals 121A of the unit cell group 120 are formed, which is troublesome and cumbersome. For this reason, the workability of assembling the battery wiring module 101 to the unit cell group 120 was poor.

そこで、バスバ１０３を一つずつ単電池群１２０の電極端子１２１Ａの形成位置に合わせて移動させる手間を低減しつつ、電極端子１２１Ａ間のピッチのずれがあったとしても、このピッチのずれを端子貫通孔によって吸収させるために、バスバ１０３に形成された一対の端子貫通孔をさらに大きく形成して、バスバ１０３をバスバ収容部１０４内における移動量を小さくしつつ、端子貫通孔を単電池１２１の電極端子１２１Ａに挿入していたが、バスバ１０３と単電池１２１の電極端子１２１Ａの接触面積が小さくされることとなり、通電性能が悪くなる問題があった。   Therefore, even if there is a shift in the pitch between the electrode terminals 121A while reducing the effort of moving the bus bar 103 one by one in accordance with the formation position of the electrode terminal 121A of the unit cell group 120, the shift in the pitch is determined as a terminal. A pair of terminal through-holes formed in the bus bar 103 are formed to be larger in order to absorb the through-holes, and the terminal through-holes of the unit cell 121 are formed while reducing the amount of movement of the bus bar 103 in the bus bar housing portion 104. Although it was inserted in the electrode terminal 121A, the contact area between the bus bar 103 and the electrode terminal 121A of the unit cell 121 was reduced, and there was a problem that the energization performance deteriorated.

本発明は、バスバモジュールの複数の電池への組付け作業性の向上を図ったバスバモジュール及び電源装置を提供することを目的とする。   An object of the present invention is to provide a bus bar module and a power supply device that improve the workability of assembling the bus bar module to a plurality of batteries.

請求項１記載の本発明は、各電極が直線上に並ぶように配列された複数の電池のうち隣接する電池の電極同士を接続することでこれら複数の電池を直列に接続する複数の板状のバスバと、前記複数のバスバを収容するケースと、を備えたバスバモジュールであって、前記ケースには、前記各バスバを収容する複数の収容部が設けられ、前記各収容部には、前記バスバの板厚方向に立設して前記バスバを取り囲む周壁が設けられ、前記バスバと前記収容部の周壁とのうち少なくともいずれか一方には、前記バスバの面延在方向に弾性変形自在に設けられた弾性部が設けられ、前記弾性部が、互いに対向する位置に少なくとも一対設けられて、前記バスバを前記面延在方向に移動自在に挟持するとともに、前記周壁と前記バスバの間に介在することで、前記バスバを前記周壁から離間した所定位置に位置させるとするバスバモジュールである。   The present invention according to claim 1 is a plurality of plate-like shapes in which a plurality of batteries are connected in series by connecting electrodes of adjacent batteries among a plurality of batteries arranged so that each electrode is arranged in a straight line. Bus bar module, and a case for accommodating the plurality of bus bars, wherein the case is provided with a plurality of accommodating portions for accommodating the respective bus bars. A peripheral wall is provided to stand in the plate thickness direction of the bus bar and surround the bus bar, and at least one of the bus bar and the peripheral wall of the housing portion is provided to be elastically deformable in the surface extending direction of the bus bar. And at least a pair of the elastic portions provided at positions facing each other so as to sandwich the bus bar movably in the surface extending direction, and interposed between the peripheral wall and the bus bar. This In a busbar module to be positioned in a predetermined position spaced said busbar from said peripheral wall.

請求項２記載の本発明は、請求項１記載の本発明において、前記弾性部が、前記周壁に設けられ、前記弾性部には、前記周壁の板厚方向に弾性変形するアームが設けられ、前記アームが、前記周壁に略コ字状のスリットが形成されることにより、前記周壁の一部から構成されたことを特徴とする。   According to a second aspect of the present invention, in the first aspect of the present invention, the elastic portion is provided on the peripheral wall, and the elastic portion is provided with an arm that is elastically deformed in a thickness direction of the peripheral wall. The arm is formed of a part of the peripheral wall by forming a substantially U-shaped slit in the peripheral wall.

請求項３記載の本発明は、請求項１記載の本発明において、前記弾性部が、前記周壁に設けられ、前記弾性部には、前記周壁の板厚方向に弾性変形するアームが設けられ、前記アームは、一端が、前記周壁の前記バスバが設けられる側の内面に連続され、他端が前記バスバに向かって延在した自由端となる片持ち板状に設けられていることを特徴とする。   According to a third aspect of the present invention, in the first aspect of the present invention, the elastic portion is provided on the peripheral wall, and the elastic portion is provided with an arm that is elastically deformed in a plate thickness direction of the peripheral wall. The arm is provided with a cantilever plate having one end continuous to the inner surface of the peripheral wall on the side where the bus bar is provided and the other end serving as a free end extending toward the bus bar. To do.

請求項４記載の本発明は、請求項３記載の本発明において、前記周壁は、互いに対向する対向壁と、該対向壁を連結するとともに、互いに隣り合う前記収容部を仕切る隔壁とで構成され、前記隔壁には、前記電池の配列方向の両側の面それぞれに、前記アームが設けられていることを特徴とする。   According to a fourth aspect of the present invention, in the third aspect of the present invention, the peripheral wall includes an opposing wall facing each other, and a partition that connects the opposing walls and partitions the accommodating portions adjacent to each other. The partition is provided with the arm on each surface on both sides in the arrangement direction of the batteries.

請求項５記載の本発明は、正極及び負極が交互に逆向きに重ね合わされた複数の電池から構成された電池集合体と、請求項１乃至請求項４のうちいずれか一項に記載されたバスバモジュールと、を備えたことを特徴とする電源装置である。   The present invention described in claim 5 is described in any one of claims 1 to 4, and a battery assembly including a plurality of batteries in which positive and negative electrodes are alternately stacked in opposite directions. And a bus bar module.

請求項１、５記載の本発明によれば、バスバと収容部の周壁とのうち少なくともいずれか一方には、バスバの面延在方向に弾性変形自在に設けられた弾性部が設けられ、弾性部が、互いに対向する位置に少なくとも一対設けられて、バスバをその面延在方向に移動自在に挟持するとともに、周壁とバスバの間に介在することで、バスバを周壁から離間した所定位置に位置させる。よって、バスバが収容部に収容された状態で傾けられたとしても、一対の弾性部が、周壁とバスバの間に介在して、バスバは収容部の片側に寄せられることがなくなり、バスバを一つずつ電池の電極の形成位置に合わせて移動させる手間を省くことができ、さらに、電池の電極の形成位置に、公差寸法範囲内の誤差が生じた場合であっても、弾性部が、弾性変形することで、バスバが移動して、バスバと各電極との位置ずれ、即ち公差を吸収するから、バスバモジュールの電池集合体への組付け作業性を向上することができる。   According to the first and fifth aspects of the present invention, at least one of the bus bar and the peripheral wall of the accommodating portion is provided with the elastic portion that is elastically deformable in the surface extending direction of the bus bar, and is elastic. At least a pair of portions are provided at positions facing each other so that the bus bar is movably sandwiched in the surface extending direction and interposed between the peripheral wall and the bus bar so that the bus bar is positioned at a predetermined position away from the peripheral wall. Let Therefore, even if the bus bar is tilted while being accommodated in the accommodating portion, the pair of elastic portions are interposed between the peripheral wall and the bus bar so that the bus bar is not brought to one side of the accommodating portion. This eliminates the need to move the battery electrode according to the position where the battery electrode is formed, and even if an error within the tolerance size range occurs at the battery electrode position, the elastic portion is elastic. By deforming, the bus bar moves and absorbs the positional deviation between the bus bar and each electrode, that is, tolerance, so that the workability of assembling the bus bar module to the battery assembly can be improved.

また、バスバに貫通孔が形成され、この貫通孔に電池の電極が挿入されて、バスバと電池とが電気接続される場合には、バスバが一対の弾性部により挟持されているから、一対の弾性部が弾性変形することで、バスバの貫通孔に電池の電極が挿入するように、バスバを電池の電極の形成位置に合わせて移動させ易くできる。また、電池の電極の形成位置に、公差寸法範囲内の誤差が生じた場合であっても、バスバを電池の電極の形成位置に合わせて容易に移動できるから、バスバに形成された貫通孔の大きさを従来のように大きく形成する必要がなく、即ち従来よりも小さくすることができ、これにより、電池の電極とバスバとの接触面積が大きくなり、電池とバスバとの通電性能を向上することができる。   In addition, when a through hole is formed in the bus bar and the battery electrode is inserted into the through hole and the bus bar and the battery are electrically connected, the bus bar is sandwiched between the pair of elastic portions. By elastically deforming the elastic portion, the bus bar can be easily moved in accordance with the position where the battery electrode is formed so that the battery electrode is inserted into the through hole of the bus bar. In addition, even if an error within the tolerance size range occurs in the battery electrode formation position, the bus bar can be easily moved in accordance with the battery electrode formation position. There is no need to make the size larger than in the conventional case, that is, the size can be made smaller than in the conventional case, thereby increasing the contact area between the battery electrode and the bus bar and improving the current-carrying performance between the battery and the bus bar. be able to.

請求項２記載の本発明によれば、弾性部が、周壁に設けられ、弾性部には、周壁の板厚方向に弾性変形するアームが設けられ、アームが、周壁に略コ字状のスリットが形成されることにより、周壁の一部から構成された。このように、周壁の一部をアームとすることで、樹脂材料を削減しつつ、バスバを周壁から離間した所定位置に位置させるから、バスバモジュールの複数の電池への組付け作業性を向上することができる。   According to the second aspect of the present invention, the elastic portion is provided on the peripheral wall, the elastic portion is provided with an arm that is elastically deformed in the thickness direction of the peripheral wall, and the arm is a substantially U-shaped slit in the peripheral wall. It was comprised from a part of surrounding wall by forming. In this way, by using a part of the peripheral wall as an arm, the bus bar is positioned at a predetermined position away from the peripheral wall while reducing the resin material, so that the workability of assembling the bus bar module to a plurality of batteries is improved. be able to.

請求項３記載の本発明によれば、弾性部が、周壁に設けられ、弾性部には、周壁の板厚方向に弾性変形するアームが設けられ、アームは、一端が、周壁のバスバが設けられる側の内面に連続され、他端がバスバに向かって延在した自由端となる片持ち板状に設けられているから、アームは、周壁にスリットが形成されることなく、周壁から突出して形成されていることとなり、よって、周壁の強度を確保しつつ、バスバを周壁から離間した所定位置に位置させるから、バスバモジュールの複数の電池への組付け作業性を向上することができる。   According to the third aspect of the present invention, the elastic portion is provided on the peripheral wall, the elastic portion is provided with an arm that is elastically deformed in the thickness direction of the peripheral wall, and one end of the arm is provided with the bus bar of the peripheral wall. Since the arm is provided in the shape of a cantilever plate that is a free end that extends toward the bus bar and the other end extends toward the bus bar, the arm protrudes from the peripheral wall without forming a slit in the peripheral wall. Therefore, the bus bar is positioned at a predetermined position spaced apart from the peripheral wall while ensuring the strength of the peripheral wall, so that the workability of assembling the bus bar module to a plurality of batteries can be improved.

請求項４記載の本発明によれば、周壁は、互いに対向する対向壁と、該対向壁を連結するとともに、互いに隣り合う収容部を仕切る隔壁とで構成され、隔壁には、電池の配列方向の両側の面それぞれに、アームが設けられている。即ち、隣り合う収容部に収容されたバスバを絶縁するための隔壁が、隣り合う収容部間で共通に用いられることとなり、隣り合う収容部に収容されたバスバ間の間隔を小さくすることができる。よって、ケース即ち、バスバモジュールの電池の配列方向の小型化を図ることができる。   According to the fourth aspect of the present invention, the peripheral wall is composed of opposing walls facing each other, and partition walls that connect the opposing walls and partition the storage portions adjacent to each other. Arms are provided on each of both sides. That is, the partition for insulating the bus bars accommodated in the adjacent accommodating portions is used in common between the adjacent accommodating portions, and the interval between the bus bars accommodated in the adjacent accommodating portions can be reduced. . Therefore, it is possible to reduce the size of the case, that is, the battery array direction of the bus bar module.

本発明の第１実施形態にかかるバスバモジュールを備えた電源装置の分解斜視図である。It is a disassembled perspective view of the power supply device provided with the bus bar module concerning 1st Embodiment of this invention. 図１に示されたバスバモジュールを構成するバスバ収容部を示す斜視図である。It is a perspective view which shows the bus bar accommodating part which comprises the bus bar module shown by FIG. 図２に示されたバスバ収容部を示す平面図であり、（Ａ）は上面図であり、（Ｂ）は側面図であり、（Ｃ）は（Ａ）中のＩ−Ｉ線に沿う断面図である。It is a top view which shows the bus bar accommodating part shown by FIG. 2, (A) is a top view, (B) is a side view, (C) is a cross section along the II line in (A). FIG. 本発明の第２実施形態にかかるバスバモジュールを構成するバスバ収容部を示す斜視図である。It is a perspective view which shows the bus bar accommodating part which comprises the bus bar module concerning 2nd Embodiment of this invention. 図４に示すバスバ収容部にバスバが収容された状態を示す図あり、（Ａ）は平面図であり、（Ｂ）は（Ａ）中のＩＩ−ＩＩ線に沿う断面図である。It is a figure which shows the state by which the bus bar was accommodated in the bus bar accommodating part shown in FIG. 4, (A) is a top view, (B) is sectional drawing which follows the II-II line in (A). 本発明の第３実施形態にかかるバスバモジュールを構成するバスバ収容部を示す斜視図である。It is a perspective view which shows the bus bar accommodating part which comprises the bus bar module concerning 3rd Embodiment of this invention. 図６に示すバスバ収容部にバスバが収容された状態を示す図あり、（Ａ）は平面図であり、（Ｂ）は（Ａ）中のＩＩＩ−ＩＩＩ線に沿う断面図である。It is a figure which shows the state by which the bus bar was accommodated in the bus bar accommodating part shown in FIG. 6, (A) is a top view, (B) is sectional drawing which follows the III-III line in (A). 図１乃至図７に示されたバスバモジュールを構成する弾性部の変形性を示す平面図である。It is a top view which shows the deformability of the elastic part which comprises the bus bar module shown by FIG. 1 thru | or FIG. 従来の電池モジュールを示す平面図である。It is a top view which shows the conventional battery module.

（第１実施形態）
以下、本発明の一実施の形態にかかるバスバモジュール及び電源装置を図１乃至図３を参照して説明する。 (First embodiment)
A bus bar module and a power supply device according to an embodiment of the present invention will be described below with reference to FIGS.

図１に示すように、バスバモジュール１は、同図に示す電池集合体２の上面に取り付けられて電源装置１０を構成するものである。この電源装置１０は、電動モータを用いて走行する電気自動車や、エンジンと電動モータとを併用して走行するハイブリッド自動車などに搭載され、前記電動モータに電力を供給するものである。   As shown in FIG. 1, the bus bar module 1 is attached to the upper surface of the battery assembly 2 shown in FIG. The power supply device 10 is mounted on an electric vehicle that travels using an electric motor, a hybrid vehicle that travels using both an engine and an electric motor, and supplies power to the electric motor.

電池集合体２は、図１に示すように、複数の電池２０と、これら複数の電池２０を互いに重ねて固定する固定部材（図示しない）と、を有している。また、各電池２０は、箱型の筐体内に電解液が充填された電池本体２１と、この電池本体２１の一方の側面及び、他方の側面からそれぞれ突出した正極２２（「電極」の一例）及び負極２３（「電極」の一例）と、を有している。これら正極２２及び負極２３は、それぞれ、導電性の金属により円柱状に形成されており、その外周面には、ナット２Ａと螺合するネジ溝が形成されている。   As shown in FIG. 1, the battery assembly 2 includes a plurality of batteries 20 and a fixing member (not shown) that fixes the plurality of batteries 20 so as to overlap each other. Each battery 20 includes a battery main body 21 filled with an electrolyte in a box-shaped housing, and a positive electrode 22 (an example of an “electrode”) protruding from one side surface and the other side surface of the battery main body 21. And a negative electrode 23 (an example of an “electrode”). Each of the positive electrode 22 and the negative electrode 23 is formed in a cylindrical shape from a conductive metal, and a thread groove that is screwed into the nut 2 </ b> A is formed on the outer peripheral surface thereof.

さらに、複数の電池２０には、これら電池２０の重なり方向に沿って正極２２及び負極２３が直線上に交互に並ぶように二列に配列されている。ここで、図１中の矢印Ｙは、複数の電池２０の配列方向、及びバスバモジュール１の長手方向を示し、矢印Ｘは、バスバモジュール１の幅方向を示し、矢印Ｚは、バスバモジュール１の高さ方向を示している。また、本明細書において、バスバ３の面延在方向は、矢印Ｙ方向と矢印Ｘ方向とを総称して示す方向のことをいう。また、本明細書において、バスバモジュール１の高さ方向を、上下方向と記す場合がある。   Furthermore, the plurality of batteries 20 are arranged in two rows so that the positive electrodes 22 and the negative electrodes 23 are alternately arranged in a straight line along the overlapping direction of the batteries 20. Here, the arrow Y in FIG. 1 indicates the arrangement direction of the plurality of batteries 20 and the longitudinal direction of the bus bar module 1, the arrow X indicates the width direction of the bus bar module 1, and the arrow Z indicates the bus bar module 1. The height direction is shown. Moreover, in this specification, the surface extending direction of the bus bar 3 refers to a direction collectively indicating the arrow Y direction and the arrow X direction. Moreover, in this specification, the height direction of the bus bar module 1 may be described as an up-down direction.

バスバモジュール１は、前述した複数の電池２０を直列接続するものであり、図１に示すように、互いに隣り合う電池２０の正極２２と負極２３とを接続することで複数の電池２０を直列に接続する複数のバスバ３と、これら複数のバスバ３を収容するケース４と、を有している。バスバモジュール１は、複数の電池２０のうち両端に位置するとともに互いに異なる極性の電極２２、２３に前記電動モータが接続されて、当該電動モータに電力を供給する。   The bus bar module 1 is configured to connect the plurality of batteries 20 described above in series. As illustrated in FIG. 1, the plurality of batteries 20 are connected in series by connecting a positive electrode 22 and a negative electrode 23 of the adjacent batteries 20. A plurality of bus bars 3 to be connected and a case 4 for housing the plurality of bus bars 3 are provided. In the bus bar module 1, the electric motor is connected to the electrodes 22 and 23 that are located at both ends of the plurality of batteries 20 and have different polarities, and supplies electric power to the electric motor.

複数のバスバ３は、それぞれ、金属板にプレス加工等が施されて得られるものであり、図１に示すように、長方形板状の金属板に、互いに隣り合う電極２２、２３の正極２２及び負極２３を挿入する一対の貫通孔３ａが形成された構成である。このバスバ３は、一対の貫通孔３ａに挿入した正極２２及び負極２３にナット２Ａが螺合されることで、これら正極２２及び負極２３に固定されるとともに各電池２０に電気的に接続される。   Each of the plurality of bus bars 3 is obtained by pressing a metal plate or the like. As shown in FIG. 1, as shown in FIG. 1, the rectangular plate-like metal plate has positive electrodes 22 and 23 adjacent to each other. In this configuration, a pair of through holes 3 a into which the negative electrode 23 is inserted are formed. The bus bar 3 is fixed to the positive electrode 22 and the negative electrode 23 and electrically connected to each battery 20 by screwing the nut 2A to the positive electrode 22 and the negative electrode 23 inserted into the pair of through holes 3a. .

ケース４は、図１に示すように電池集合体２の上面と略等しい略長方形に形成されており、電池集合体２の上面に重ねられる。ケース４は、図２にも示すように、各バスバ３をそれぞれ収容可能な箱状に形成されかつ矢印Ｙ方向に沿って直線上に連結された複数のバスバ収容部５「（収容部）の一例」を備えて構成されている。   As shown in FIG. 1, the case 4 is formed in a substantially rectangular shape substantially equal to the upper surface of the battery assembly 2, and is overlaid on the upper surface of the battery assembly 2. As shown in FIG. 2, the case 4 is formed of a plurality of bus bar accommodating portions 5 ″ (accommodating portions) that are formed in a box shape that can accommodate the bus bars 3 and that are linearly connected along the arrow Y direction. An example is provided.

複数のバスバ収容部５は、図２、図３に示すように、それぞれ、バスバ３の板厚方向（矢印Ｚ方向）に枠状に立設した周壁６から構成されている。   As shown in FIGS. 2 and 3, each of the plurality of bus bar accommodating portions 5 includes a peripheral wall 6 erected in a frame shape in the plate thickness direction (arrow Z direction) of the bus bar 3.

周壁６は、バスバ３を取り囲むように立設した４つの側壁６Ａ、６Ｂ、６Ｃ、６Ｄから構成されていて、各側壁６Ａ、６Ｂ、６Ｃ、６Ｄにはそれぞれ、バスバ３を挟持した状態で、バスバ３を周壁６から離間した所定位置に位置させる弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが設けられている。   The peripheral wall 6 is composed of four side walls 6A, 6B, 6C, and 6D that stand up so as to surround the bus bar 3, and each side wall 6A, 6B, 6C, and 6D holds the bus bar 3 in each state, Elastic portions 8A, 8B, 8C, and 8D are provided for positioning the bus bar 3 at predetermined positions separated from the peripheral wall 6.

各弾性部８Ａ、８Ｂ、８Ｃ、８Ｄは、図３に示すように、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄそれぞれの板厚方向に弾性変形自在に形成されたアーム８０と、アーム８０の下端部からバスバ収容部５の内方に向かって突出して形成されて、互いに対向する弾性部８Ａ、８Ｂ、及び、弾性部８Ｃ、８Ｄ間でバスバ３を支持する支持部８１と、を備えている。   As shown in FIG. 3, each of the elastic portions 8A, 8B, 8C, and 8D includes an arm 80 that is elastically deformable in the thickness direction of each of the side walls 6A, 6B, 6C, and 6D, and a lower end portion of the arm 80. And the support portion 81 that supports the bus bar 3 between the elastic portions 8C and 8D. The elastic portions 8A and 8B are formed so as to protrude inward from the bus bar accommodating portion 5 and face each other.

アーム８０は、図３（Ａ）（Ｂ）に示すように、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄに上下方向に直線状に延在して互いに平行に形成された一対のスリット６０と、一対のスリット６０の下端同士を連続させる連続部６１と、が形成され、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄの一部を略コ字状に打ち抜くことで構成されたものであり、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄの一部から構成されている。   As shown in FIGS. 3A and 3B, the arm 80 includes a pair of slits 60 that extend linearly in the vertical direction on the side walls 6A, 6B, 6C, and 6D and are formed in parallel with each other. And a continuous portion 61 is formed by continuously punching a part of each side wall 6A, 6B, 6C, 6D into a substantially U shape. It consists of a part of 6B, 6C, 6D.

支持部８１は、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄの内面から、バスバ収容部５の内方に突出して設けられ、支持部８１には、図３（Ｃ）に示すように、バスバ３の周縁を収容する凹溝８２と、バスバ３を凹溝８２に案内する案内面８４と、が形成されている。凹溝８２は、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄの内面と平行な平行面８３から凹に形成され、矢印Ｙ方向に延在して形成されている。この凹溝８２の底は、各側壁６Ａ、６Ｂ，６Ｃ、６Ｄよりもバスバ収容部５の内方に位置している。よって、バスバ３の周縁が凹溝８２内に収容された状態で、少なくとも側壁６Ａ、６Ｂ，６Ｃ、６Ｄの内面から凹溝８２の底までの距離だけ、バスバ３は、側壁６Ａ、６Ｂ，６Ｃ、６Ｄから離間した位置に位置される。   The support portion 81 is provided so as to protrude from the inner surface of each of the side walls 6A, 6B, 6C, and 6D to the inside of the bus bar housing portion 5, and the support portion 81 includes the bus bar 3 as shown in FIG. A concave groove 82 that accommodates the peripheral edge and a guide surface 84 that guides the bus bar 3 to the concave groove 82 are formed. The concave groove 82 is formed in a concave shape from a parallel surface 83 parallel to the inner surface of each of the side walls 6A, 6B, 6C, 6D, and extends in the arrow Y direction. The bottom of the concave groove 82 is located inward of the bus bar accommodating portion 5 with respect to the side walls 6A, 6B, 6C, 6D. Therefore, in a state where the peripheral edge of the bus bar 3 is accommodated in the concave groove 82, the bus bar 3 has the side walls 6A, 6B, 6C at least the distance from the inner surface of the side walls 6A, 6B, 6C, 6D to the bottom of the concave groove 82. , 6D.

案内面８４は、支持部８１に設けられた平行面８３の上端から、さらに上方に向かうに従って、バスバ収容部５の外方に向かって傾斜した傾斜面から形成されている。   The guide surface 84 is formed from an inclined surface that is inclined outward from the upper end of the parallel surface 83 provided on the support portion 81 and further upward.

このような弾性部８Ａ、８Ｂ、８Ｃ、８Ｄがバスバ３を挟持する際には、バスバ３をバスバ収容部５の上方の開口から下方に押し込む。すると、バスバ３が弾性部８Ａ、８Ｂ、８Ｃ、８Ｄの案内面８４に当接する。さらにバスバ３を下方に押し込むに伴って、バスバ３が案内面８４を押圧し、アーム８０がバスバ収容部５の外方に弾性変形する。バスバ３が案内面８４を乗り上げ、乗り越えて、バスバ３の周縁が凹溝８２内に収容される。これと同時にアーム８０が弾性復元する。こうして、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄがバスバ３を挟持する。   When such elastic portions 8A, 8B, 8C, 8D sandwich the bus bar 3, the bus bar 3 is pushed downward from the upper opening of the bus bar accommodating portion 5. Then, the bus bar 3 comes into contact with the guide surfaces 84 of the elastic portions 8A, 8B, 8C, 8D. Further, as the bus bar 3 is pushed downward, the bus bar 3 presses the guide surface 84 and the arm 80 is elastically deformed outward from the bus bar accommodating portion 5. The bus bar 3 rides on the guide surface 84 and gets over, and the peripheral edge of the bus bar 3 is accommodated in the recessed groove 82. At the same time, the arm 80 is elastically restored. Thus, the elastic portions 8A, 8B, 8C, and 8D sandwich the bus bar 3.

ここで、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄがバスバ３を挟持しているとともに、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが弾性変形していない状態では、バスバ３と側壁６Ａ、６Ｂ，６Ｃ、６Ｄとの間に弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが介在するから、バスバ３は、側壁６Ａ、６Ｂ，６Ｃ、６Ｄの内面から凹溝８２の底までの距離だけ、側壁６Ａ、６Ｂ，６Ｃ、６Ｄから離間した所定位置に位置される。   Here, in a state where the elastic portions 8A, 8B, 8C, 8D sandwich the bus bar 3 and the elastic portions 8A, 8B, 8C, 8D are not elastically deformed, the bus bar 3 and the side walls 6A, 6B, 6C, Since the elastic portions 8A, 8B, 8C, and 8D are interposed between the bus bar 3 and the 6D, the bus bar 3 has the side walls 6A, 6B, and 6C corresponding to the distance from the inner surface of the side walls 6A, 6B, 6C, and 6D to the bottom of the concave groove 82. , 6D is located at a predetermined position.

この際、バスバ３は４つの辺（周縁）を４つの弾性部８Ａ、８Ｂ、８Ｃ、８Ｄそれぞれに挟持されているから、例えば、矢印Ｙ方向に対向する一対の弾性部８Ａ、８Ｂが、矢印Ｙ方向に弾性変形することでバスバ３は矢印Ｙ方向に移動され、矢印Ｘ方向に対向する一対の弾性部８Ｃ、８Ｄが、矢印Ｘ方向に弾性変形することでバスバ３は矢印Ｘ方向に移動される。つまり、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄがバスバ３を挟持した状態では、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが、バスバ３をその面延在方向（弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが弾性変形する方向）に移動自在に支持している。   At this time, since the bus bar 3 has four sides (peripheries) sandwiched between the four elastic portions 8A, 8B, 8C, and 8D, for example, the pair of elastic portions 8A and 8B that face each other in the arrow Y direction are By elastically deforming in the Y direction, the bus bar 3 is moved in the arrow Y direction, and when a pair of elastic portions 8C and 8D facing in the arrow X direction are elastically deformed in the arrow X direction, the bus bar 3 is moved in the arrow X direction. Is done. That is, in a state where the elastic portions 8A, 8B, 8C, and 8D sandwich the bus bar 3, the elastic portions 8A, 8B, 8C, and 8D are connected to the bus bar 3 in the surface extending direction (the elastic portions 8A, 8B, 8C, and 8D are It is movably supported in the direction of elastic deformation.

続いて、電源装置１０の組立手順を、図１を参照して、説明する。まず、複数のバスバ３、ケース４を別々に製造しておく。そして、複数のバスバ３をそれぞれバスバ収容部５に押し込んで、各バスバ収容部５に形成された複数の弾性部８Ａ、８Ｂ、８Ｃ、８Ｄにより各バスバ３を挟持させる。こうして、各バスバ３を各バスバ収容部５に収容する。次に、ケース４を、電池集合体２の上面に近付け、ケース４のバスバ収容部５の開口、バスバ３の貫通孔３ａを挿入された正極２２、及び負極２３にナット２Ａを螺合する。こうして、電池２０の電極２２、２３とバスバ３とを電気的に接続する。こうして、電源装置１０の組み立てが完了する。   Next, the assembly procedure of the power supply device 10 will be described with reference to FIG. First, a plurality of bus bars 3 and a case 4 are manufactured separately. Then, the plurality of bus bars 3 are respectively pushed into the bus bar accommodating portions 5, and the respective bus bars 3 are sandwiched by the plurality of elastic portions 8 </ b> A, 8 </ b> B, 8 </ b> C, 8 </ b> D formed in the respective bus bar accommodating portions 5. In this way, each bus bar 3 is accommodated in each bus bar accommodating portion 5. Next, the case 4 is brought close to the upper surface of the battery assembly 2, and the nut 2 </ b> A is screwed into the opening of the bus bar housing portion 5 of the case 4, the positive electrode 22 into which the through hole 3 a of the bus bar 3 is inserted, and the negative electrode 23. Thus, the electrodes 22 and 23 of the battery 20 and the bus bar 3 are electrically connected. Thus, the assembly of the power supply device 10 is completed.

この際、電池２０の電極２２、２３の形成位置に、公差寸法範囲内の誤差が生じた場合であっても、バスバ３が弾性部８Ａ、８Ｂ、８Ｃ、８Ｄにより移動自在に支持されているから、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄを弾性変形させて、バスバ３を電池２０の電極２２、２３の形成位置に合わせて移動させ、バスバ３の貫通孔を電池２０の電極２２、２３に挿入させることができる。   At this time, the bus bar 3 is movably supported by the elastic portions 8A, 8B, 8C, and 8D even when an error within the tolerance size range occurs in the formation position of the electrodes 22 and 23 of the battery 20. Then, the elastic portions 8A, 8B, 8C, and 8D are elastically deformed to move the bus bar 3 in accordance with the positions where the electrodes 22 and 23 of the battery 20 are formed, and the through holes of the bus bar 3 are moved to the electrodes 22 and 23 of the battery 20. Can be inserted.

上述した実施形態によれば、バスバ収容部５の周壁６には、バスバ３の面延在方向に弾性変形自在に設けられた弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが設けられ、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが、互いに対向する位置に一対設けられ、一対の弾性部８Ａ、８Ｂ、８Ｃ、８Ｄが、バスバ３を挟持した状態で、バスバ３を周壁６から離間した所定位置に位置させるから、例えば、バスバ３がバスバ収容部５に収容された状態で傾けられたとしても、バスバ３は弾性部８Ａ、８Ｂ、８Ｃ、８Ｄにより挟持されているから、側壁６Ａ、６Ｂ，６Ｃ、６Ｄから離間した所定位置に位置される。よって、バスバ３はバスバ収容部５の片側に寄せられることがなくなり、バスバ３を一つずつ電池２０の電極２２、２３の形成位置に合わせて移動させる手間を省くことができる。さらに、電池２０の電極２２、２３の形成位置に、公差寸法範囲内の誤差が生じた場合であっても、弾性部８Ａ、８Ｂ、８Ｃ、８Ｄを弾性変形することで、バスバ３と各電極２２、２３との位置ずれ、即ち公差を吸収するから、バスバモジュール１の電池集合体２への組付け作業性を向上することができる。   According to the above-described embodiment, the peripheral wall 6 of the bus bar housing portion 5 is provided with the elastic portions 8A, 8B, 8C, and 8D that are elastically deformable in the surface extending direction of the bus bar 3, and the elastic portion 8A, A pair of 8B, 8C, and 8D are provided at positions facing each other, and the bus bar 3 is positioned at a predetermined position separated from the peripheral wall 6 with the pair of elastic portions 8A, 8B, 8C, and 8D sandwiching the bus bar 3. Thus, for example, even if the bus bar 3 is tilted while being accommodated in the bus bar accommodating portion 5, the bus bar 3 is sandwiched between the elastic portions 8A, 8B, 8C, 8D, and therefore the side walls 6A, 6B, 6C, 6D. It is located at a predetermined position separated from. Therefore, the bus bar 3 is not brought close to one side of the bus bar accommodating portion 5, and the labor for moving the bus bar 3 one by one in accordance with the formation positions of the electrodes 22 and 23 of the battery 20 can be saved. Further, even if an error within the tolerance size range occurs at the position where the electrodes 22 and 23 of the battery 20 are formed, by elastically deforming the elastic portions 8A, 8B, 8C and 8D, the bus bar 3 and each electrode Since the positional deviation with respect to 22 and 23, that is, the tolerance is absorbed, the workability of assembling the bus bar module 1 to the battery assembly 2 can be improved.

以上、本発明について、好ましい実施形態を挙げて説明したが、本発明は上記実施形態の構成に限定されるものではない。上述した実施形態では、アーム８０は、上下方向に延在して形成された一対のスリット６０を有して構成されていたが、本発明はこれに限定されるものではない。アーム８０は、側壁６Ａ、６Ｂに形成されるとともに、バスバモジュール１の長手方向（矢印Ｙ方向）に延在して形成された一対のスリットを有して構成されていてもよく、側壁６Ｃ、６Ｄに形成されるとともに、バスバモジュール１の幅方向（矢印Ｘ方向）に延在して形成された一対のスリットを有して構成されていてもよい。   Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to the configuration of the above embodiment. In the embodiment described above, the arm 80 has a pair of slits 60 formed to extend in the vertical direction, but the present invention is not limited to this. The arm 80 may be configured to have a pair of slits formed on the side walls 6A and 6B and extending in the longitudinal direction of the bus bar module 1 (the direction of the arrow Y). While being formed in 6D, the bus bar module 1 may be configured to have a pair of slits formed extending in the width direction (arrow X direction).

（第２実施形態）
以下、本発明の第２実施形態のバスバモジュールを、図４、図５を参照して説明する。前述した第１実施形態と同一の構造乃至機能を示す部材には、同一符号を付してその説明を省略する。 (Second Embodiment)
Hereinafter, a bus bar module according to a second embodiment of the present invention will be described with reference to FIGS. 4 and 5. Members having the same structure or function as those of the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

本実施形態のバスバモジュール１Ａは、複数のバスバ３と、これら複数のバスバ３を収容するケース４と、を有している。ケース４は、図４にも示すように、各バスバ３をそれぞれ収容可能な箱状に形成されかつ矢印Ｙ方向に沿って直線上に連結された複数のバスバ収容部１５「（収容部）の一例」を備えて構成されている。ここで、第２実施形態のバスバモジュール１Ａは、バスバ収容部１５以外は、第１実施形態のバスバモジュール１と同じ構成に形成されている。   The bus bar module 1 </ b> A of the present embodiment includes a plurality of bus bars 3 and a case 4 that accommodates the plurality of bus bars 3. As shown in FIG. 4, the case 4 is formed of a plurality of bus bar accommodating portions 15 ″ (accommodating portions) that are formed in a box shape that can accommodate the respective bus bars 3 and that are linearly connected along the arrow Y direction. An example is provided. Here, the bus bar module 1A of the second embodiment is formed in the same configuration as the bus bar module 1 of the first embodiment except for the bus bar accommodating portion 15.

複数のバスバ収容部１５は、図４、図５に示すように、それぞれ、バスバ３の板厚方向（矢印Ｚ方向）に枠状に立設した周壁１６と、周壁１６の下端縁に連続されるとともにその４つの隅部に設けられた底壁１７と、を備えている。バスバ収容部１５は、底壁１７の中央部に電池２０の電極２２、２３をそれぞれ挿入させるための開口７０を有している。   As shown in FIGS. 4 and 5, the plurality of bus bar accommodating portions 15 are respectively connected to the peripheral wall 16 erected in a frame shape in the plate thickness direction (arrow Z direction) of the bus bar 3 and the lower end edge of the peripheral wall 16. And a bottom wall 17 provided at the four corners thereof. The bus bar accommodating portion 15 has an opening 70 for inserting the electrodes 22 and 23 of the battery 20 in the central portion of the bottom wall 17.

周壁１６は、バスバ３を取り囲むように立設した４つの側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄから構成されていて、各側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄにはそれぞれ、バスバ３を挟持した状態で、バスバ３を周壁１６から離間した所定位置に位置させる弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄが設けられている。   The peripheral wall 16 is composed of four side walls 16A, 16B, 16C, and 16D that stand up so as to surround the bus bar 3, and each side wall 16A, 16B, 16C, and 16D holds the bus bar 3 in each state, Elastic portions 18A, 18B, 18C, and 18D for positioning the bus bar 3 at predetermined positions separated from the peripheral wall 16 are provided.

各弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄは、図５に示すように、各側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄそれぞれの板厚方向に弾性変形自在に形成されたアーム１８０と、アーム１８０の下端部からバスバ収容部１５の内方に向かって突出して形成されて、互いに対向する弾性部１８Ａ、１８Ｂ、及び、弾性部１８Ｃ、１８Ｄ間でバスバ３を支持する支持部１８１と、を備えている。   As shown in FIG. 5, the elastic portions 18A, 18B, 18C, and 18D include an arm 180 that is elastically deformable in the plate thickness direction of each side wall 16A, 16B, 16C, and 16D, and a lower end portion of the arm 180. And the support portion 181 that supports the bus bar 3 between the elastic portions 18C and 18D. The elastic portions 18A and 18B are formed so as to protrude inward from the bus bar accommodating portion 15 and face each other.

アーム１８０は、一端が各側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄの内面に連続され、バスバ収容部１５の内方に向かうに従って底壁１７（下方）に向かって傾斜した傾斜部１８２と、この傾斜部１８２に連続されて各側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄと一定間隔をあけて対向するように底壁１７に向かって下方に延在した延在部１８３と、を備え、一端が、各側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄの内面に連続され、他端が底壁１７に向かって延在した自由端となる片持ち板状に構成されている。ここで、バスバモジュール１の長手方向（矢印Ｙ方向）に対向する弾性部１８Ａ、１８Ｂのアーム１８０の延在部１８３間の離間寸法は、バスバ３の長手寸法と略等しくなるように形成され、バスバモジュール１の幅方向（矢印Ｘ方向）に対向する弾性部１８Ｃ、１８Ｄのアーム１８０の延在部１８３間の離間寸法は、バスバ３の幅寸法と略等しくなるように形成されている。   One end of the arm 180 is connected to the inner surface of each of the side walls 16A, 16B, 16C, and 16D, and the inclined portion 182 is inclined toward the bottom wall 17 (downward) toward the inside of the bus bar accommodating portion 15, and the inclined portion. 182 and an extending portion 183 that extends downward toward the bottom wall 17 so as to face the side walls 16A, 16B, 16C, and 16D at a predetermined interval. One end of each side wall 16A , 16B, 16C, 16D, and the other end is configured as a cantilever plate that is a free end extending toward the bottom wall 17. Here, the separation dimension between the extending portions 183 of the arms 180 of the elastic portions 18A and 18B facing the longitudinal direction (arrow Y direction) of the bus bar module 1 is formed to be substantially equal to the longitudinal dimension of the bus bar 3. The separation dimension between the extending portions 183 of the arms 180 of the elastic portions 18C and 18D facing the width direction (arrow X direction) of the bus bar module 1 is formed to be substantially equal to the width dimension of the bus bar 3.

支持部１８１は、アーム１８０の自由端である延在部１８３の下端から間隔をあけた位置に、延在部１８３からバスバ収容部１５の内方に向かって突出して形成されている。この支持部１８１には、延在部１８３の表面から直角に立ち上がり、バスバ３の表面に当接する当接面１８４と、延在部１８３と支持部１８１との境界位置から支持部１８１の頂部に向かって傾斜して、バスバ３を支持部１８１よりも下側まで案内する案内面１８５と、が形成されている。   The support portion 181 is formed to protrude from the extension portion 183 toward the inside of the bus bar accommodating portion 15 at a position spaced from the lower end of the extension portion 183 that is a free end of the arm 180. The support portion 181 rises at a right angle from the surface of the extension portion 183 and contacts the surface of the bus bar 3 from the boundary position between the extension portion 183 and the support portion 181 to the top of the support portion 181. A guide surface 185 that is inclined toward the lower side and guides the bus bar 3 to the lower side than the support portion 181 is formed.

このような弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄは、バスバ３を、アーム１８０の支持部１８１よりも下側の下端部で挟持するとともに、支持部１８１によって、バスバ３を底壁１７との間に押えることで、バスバ収容部１５に収容する。弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄが、バスバ３を挟持する際には、バスバ３をバスバ収容部１５の開口７０から底壁１７に近付ける。即ち、複数のバスバ３をそれぞれバスバ収容部１５に押し込む。バスバ３が弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄの案内面１８５に当接する。さらにバスバ３を底壁１７に近付けるに伴って、バスバ３が案内面１８５を押圧し、アーム１８０がバスバ収容部１５の外方に弾性変形する。バスバ３が案内面１８５を乗り上げ、乗り越えて、バスバ３がアーム１８０の支持部１８１よりも下側の下端部に移動して、バスバ３の表面に当接面１８４が当接して、当接面１８４と底壁１７との間にバスバ３を押える。これと同時にアーム１８０が弾性復元する。こうして、弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄがバスバ３を挟持する。   Such elastic portions 18A, 18B, 18C, and 18D hold the bus bar 3 at the lower end portion below the support portion 181 of the arm 180, and the bus bar 3 is connected to the bottom wall 17 by the support portion 181. To be accommodated in the bus bar accommodating portion 15. When the elastic portions 18 </ b> A, 18 </ b> B, 18 </ b> C, 18 </ b> D sandwich the bus bar 3, the bus bar 3 is brought close to the bottom wall 17 from the opening 70 of the bus bar housing portion 15. That is, each of the plurality of bus bars 3 is pushed into the bus bar accommodating portion 15. The bus bar 3 abuts on the guide surfaces 185 of the elastic portions 18A, 18B, 18C, 18D. Further, as the bus bar 3 is moved closer to the bottom wall 17, the bus bar 3 presses the guide surface 185, and the arm 180 is elastically deformed outward from the bus bar accommodating portion 15. When the bus bar 3 rides on and over the guide surface 185, the bus bar 3 moves to the lower end portion below the support portion 181 of the arm 180, the contact surface 184 contacts the surface of the bus bar 3, and the contact surface The bus bar 3 is pressed between the 184 and the bottom wall 17. At the same time, the arm 180 is elastically restored. Thus, the elastic portions 18A, 18B, 18C, 18D sandwich the bus bar 3.

上述した実施形態によれば、アーム１８０は、一端が、側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄのバスバ３が設けられる側の内面に連続され、他端が底壁１７に向かって延在した自由端となる片持ち板状に設けられているから、アーム１８０は、側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄにスリットを形成することなく形成される。よって、側壁１６Ａ、１６Ｂ、１６Ｃ、１６Ｄ、即ち、周壁１６の強度を確保しつつ、バスバ３を周壁１６から離間した所定位置に位置させるから、バスバモジュール１Ａの複数の電池２０への組付け作業性を向上することができる。   According to the embodiment described above, the arm 180 has one end continuous to the inner surface of the side wall 16A, 16B, 16C, 16D on the side where the bus bar 3 is provided, and the other end extending toward the bottom wall 17. The arm 180 is formed without forming a slit in the side walls 16A, 16B, 16C, 16D. Therefore, the side wall 16A, 16B, 16C, 16D, that is, the bus bar 3 is positioned at a predetermined position away from the peripheral wall 16 while ensuring the strength of the peripheral wall 16, so that the bus bar module 1A is assembled to the plurality of batteries 20. Can be improved.

（第３実施形態）
以下、本発明の第３実施形態のバスバモジュールを、図６、図７を参照して説明する。前述した第１、第２実施形態と同一の構造乃至機能を示す部材には、同一符号を付してその説明を省略する。 (Third embodiment)
Hereinafter, a bus bar module according to a third embodiment of the present invention will be described with reference to FIGS. Members having the same structure or function as those of the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.

本実施形態のバスバモジュール１Ｂは、複数のバスバ３と、これら複数のバスバ３を収容するケース４と、を有している。ケース４は、図６にも示すように、各バスバ３をそれぞれ収容可能な箱状に形成されかつ矢印Ｙ方向に沿って直線上に連結された複数のバスバ収容部２５「（収容部）の一例」を備えて構成されている。ここで、第３実施形態のバスバモジュール１Ｂは、バスバ収容部２５以外は、第１、第２実施形態のバスバモジュール１、１Ａと同じ構成に形成されている。   The bus bar module 1 </ b> B of the present embodiment includes a plurality of bus bars 3 and a case 4 that accommodates the plurality of bus bars 3. As shown in FIG. 6, the case 4 is formed of a plurality of bus bar accommodating portions 25 ″ (accommodating portions) that are formed in a box shape that can accommodate the respective bus bars 3 and that are linearly connected along the arrow Y direction. An example is provided. Here, the bus bar module 1B of the third embodiment is formed in the same configuration as the bus bar modules 1 and 1A of the first and second embodiments except for the bus bar accommodating portion 25.

複数のバスバ収容部２５は、図６、図７に示すように、バスバ３を取り囲む四角筒状の周壁２６と、周壁２６の下端縁に連続されるとともにその４つの隅部に設けられた底壁２７と、を備えている。バスバ収容部２５は、底壁２７の中央部に電池２０の電極２２、２３をそれぞれ挿入させるための開口７０を有している。   As shown in FIGS. 6 and 7, the plurality of bus bar accommodating portions 25 are connected to the rectangular cylindrical peripheral wall 26 that surrounds the bus bar 3, and the bottoms provided at the four corners of the peripheral wall 26. And a wall 27. The bus bar accommodating portion 25 has an opening 70 for inserting the electrodes 22 and 23 of the battery 20 in the central portion of the bottom wall 27.

周壁２６は、バスバモジュール１の幅方向（矢印Ｘ方向）に互いに対向する側壁２６Ｃ、２６Ｄ（「対向壁」の一例）と、互いに隣接したバスバ収容部２５間を仕切る隔壁２６Ａと、を備えて構成されている。各壁２６Ａ、２６Ｃ、２６Ｄにはそれぞれ、バスバ３を挟持した状態で、バスバ３を周壁２６から離間した所定位置に位置させる弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄが設けられている。隔壁２６Ａには、矢印Ｙ方向の両面に、弾性部１８Ａ、１８Ｂがそれぞれ形成されている。なお、第３実施形態の弾性部１８Ａ、１８Ｂ、１８Ｃ、１８Ｄは、第２実施形態と同一構成乃至機能を示す部材であるから、同一符号を付してその説明を省略する。   The peripheral wall 26 includes side walls 26C and 26D (an example of “opposing wall”) that face each other in the width direction (arrow X direction) of the bus bar module 1 and a partition wall 26A that partitions the bus bar accommodating portions 25 adjacent to each other. It is configured. Each of the walls 26A, 26C, and 26D is provided with elastic portions 18A, 18B, 18C, and 18D that position the bus bar 3 at a predetermined position spaced from the peripheral wall 26 in a state where the bus bar 3 is sandwiched. In the partition wall 26A, elastic portions 18A and 18B are formed on both surfaces in the arrow Y direction, respectively. In addition, since elastic part 18A, 18B, 18C, 18D of 3rd Embodiment is a member which shows the structure and function same as 2nd Embodiment, it attaches | subjects the same code | symbol and abbreviate | omits the description.

上述した実施形態によれば、周壁２６は、互いに対向する側壁２６Ｃ、２６Ｄ（対向壁）と、該側壁２６Ｃ、２６Ｄを連結するとともに、互いに隣り合うバスバ収容部２５を仕切る隔壁２６Ａとで構成され、隔壁２６Ａには、その両面に、弾性部１８Ａ、１８Ｂがそれぞれ設けられている。即ち、隣り合うバスバ収容部２５に収容されたバスバ３を絶縁するための隔壁２６Ａが、隣り合うバスバ収容部２５で共通に用いられることとなり、隣り合うバスバ収容部２５間の壁を１つにできるから、隣り合うバスバ収容部２５に収容されたバスバ３間の間隔を小さくすることができる。よって、各バスバモジュール１Ｂの電池２０の配列方向（矢印Ｙ方向）の小型化を図ることができる。   According to the above-described embodiment, the peripheral wall 26 includes the side walls 26C and 26D (opposing walls) facing each other, and the partition walls 26A that connect the side walls 26C and 26D and partition the bus bar accommodating portions 25 adjacent to each other. The partition wall 26A is provided with elastic portions 18A and 18B on both sides thereof. That is, the partition wall 26A for insulating the bus bars 3 accommodated in the adjacent bus bar accommodating portions 25 is commonly used in the adjacent bus bar accommodating portions 25, and the wall between the adjacent bus bar accommodating portions 25 is integrated into one. Therefore, the interval between the bus bars 3 accommodated in the adjacent bus bar accommodating portions 25 can be reduced. Therefore, it is possible to reduce the size of the battery 20 in each bus bar module 1B in the arrangement direction (arrow Y direction).

以上、本発明について、好ましい実施形態を挙げて説明したが、本発明は上記実施形態の構成に限定されるものではない。上述した実施形態では、弾性部８Ａ〜８Ｄ、１８Ａ〜１８Ｄが４つの側壁６Ａ〜６Ｄ、１６Ａ〜１６Ｄ、２６Ａ〜２６Ｄのそれぞれに形成されていたが、本発明はこれに限定されるものではない。弾性部８Ａ〜８Ｄ、１８Ａ〜１８Ｄは、隣接する電池２０の電極２２、２３の配列方向、即ちバスバモジュール１、１Ａ、１Ｂの長手方向（矢印Ｙ方向）に対向して１対設けられていてもよく、バスバモジュール１、１Ａ、１Ｂの幅方向（矢印Ｘ方向）に対向して１対設けられていてもよい。   Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to the configuration of the above embodiment. In the above-described embodiment, the elastic portions 8A to 8D and 18A to 18D are formed on the four side walls 6A to 6D, 16A to 16D, and 26A to 26D, respectively, but the present invention is not limited to this. . The elastic portions 8A to 8D and 18A to 18D are provided in a pair so as to face the arrangement direction of the electrodes 22 and 23 of the adjacent battery 20, that is, the longitudinal direction (arrow Y direction) of the bus bar modules 1, 1A and 1B. Alternatively, a pair of bus bar modules 1, 1 </ b> A, 1 </ b> B may be provided so as to face each other in the width direction (arrow X direction).

また、上述した実施形態では、弾性部８Ａ〜８Ｄ、１８Ａ〜１８Ｄが周壁６、１６、２６に形成されていたが、本発明はこれに限定されるものではない。図８に示すように、周壁６、１６、２６の代わりに、バスバ３´に、弾性部３Ａ、３Ｂ、３Ｃ、３Ｄが形成されていてもよい。バスバ３´に形成された弾性部３Ａ、３Ｂ、３Ｃ、３Ｄは、一端と他端がバスバ３の周縁の中央部において、それぞれ間隔をあけてバスバ３の周縁に連続され、一端又は他端から、一端と他端との間の中間部に向かうに従ってバスバ３´の周縁からバスバ３´の面延在方向に徐々に離れる弧状を有して、バスバ３´の面延在方向に弾性変形自在に構成されていてもよい。その場合には、複数のバスバ収容部５´は、それぞれ、バスバ３´の板厚方向（矢印Ｚ方向）に枠状に立設した周壁６´から構成されていればよい。   Moreover, in embodiment mentioned above, although the elastic parts 8A-8D and 18A-18D were formed in the surrounding walls 6, 16, 26, this invention is not limited to this. As shown in FIG. 8, elastic parts 3A, 3B, 3C, and 3D may be formed on the bus bar 3 ′ instead of the peripheral walls 6, 16, and 26. The elastic portions 3A, 3B, 3C, and 3D formed on the bus bar 3 'have one end and the other end continuous to the periphery of the bus bar 3 at intervals in the central portion of the periphery of the bus bar 3, and from one end or the other end. It has an arc shape that gradually separates from the peripheral edge of the bus bar 3 ′ in the surface extending direction of the bus bar 3 ′ toward the intermediate portion between the one end and the other end, and is elastically deformable in the surface extending direction of the bus bar 3 ′. It may be configured. In that case, each of the plurality of bus bar accommodating portions 5 ′ only needs to be constituted by a peripheral wall 6 ′ standing in a frame shape in the plate thickness direction (arrow Z direction) of the bus bar 3 ′.

なお、前述した各実施形態は本発明の代表的な形態を示したに過ぎず、本発明は実施形態に実施形態に限定されるものではない。即ち、当業者は、従来公知の知見に従い、本発明の骨子を逸脱しない範囲で種々変形して実施することができる。かかる変形によってもなお本発明のバスバモジュール１の構成を具備する限り、もちろん、本発明の範疇に含まれるものである。   Each of the above-described embodiments is merely a representative form of the present invention, and the present invention is not limited to the embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. As long as the configuration of the bus bar module 1 of the present invention is still provided by such modification, it is of course included in the scope of the present invention.

１、１Ａ、１Ｂ バスバモジュール
１０ 電源装置
２ 電池集合体
３、３´ バスバ
４ ケース
５、１５、２５ バスバ収容部（「収容部」の一例）
３Ａ〜３Ｄ、８Ａ〜８Ｄ、１８Ａ〜１８Ｄ 弾性部
Ｙ 配列方向 1, 1A, 1B Bus bar module 10 Power supply device 2 Battery assembly 3, 3 'Bus bar 4 Cases 5, 15, 25 Bus bar accommodating part (an example of "accommodating part")
3A-3D, 8A-8D, 18A-18D Elastic part Y arrangement direction

Claims (5)

各電極が直線上に並ぶように配列された複数の電池のうち隣接する電池の電極同士を接続することでこれら複数の電池を直列に接続する複数の板状のバスバと、
前記複数のバスバを収容するケースと、を備えたバスバモジュールであって、
前記ケースには、前記各バスバを収容する複数の収容部が設けられ、
前記各収容部には、前記バスバの板厚方向に立設して前記バスバを取り囲む周壁が設けられ、
前記バスバと前記収容部の周壁とのうち少なくともいずれか一方には、前記バスバの面延在方向に弾性変形自在に設けられた弾性部が設けられ、
前記弾性部が、互いに対向する位置に少なくとも一対設けられて、前記バスバを前記面延在方向に移動自在に挟持するとともに、前記周壁と前記バスバの間に介在することで、前記バスバを前記周壁から離間した所定位置に位置させることを特徴とするバスバモジュール。 A plurality of plate-like bus bars connecting the plurality of batteries in series by connecting the electrodes of adjacent batteries among the plurality of batteries arranged so that each electrode is arranged in a straight line,
A bus bar module comprising a case for accommodating the plurality of bus bars,
The case is provided with a plurality of accommodating portions for accommodating the bus bars,
Each housing portion is provided with a peripheral wall that stands upright in the thickness direction of the bus bar and surrounds the bus bar,
At least one of the bus bar and the peripheral wall of the accommodating portion is provided with an elastic portion that is elastically deformable in the surface extending direction of the bus bar,
At least a pair of the elastic portions are provided at positions facing each other, sandwich the bus bar movably in the surface extending direction, and are interposed between the peripheral wall and the bus bar so that the bus bar is inserted into the peripheral wall. A bus bar module, wherein the bus bar module is located at a predetermined position away from the bus bar module. 前記弾性部が、前記周壁に設けられ、
前記弾性部には、前記周壁の板厚方向に弾性変形するアームが設けられ、
前記アームが、前記周壁に略コ字状のスリットが形成されることにより、前記周壁の一部から構成されたことを特徴とする請求項１記載のバスバモジュール。 The elastic portion is provided on the peripheral wall;
The elastic portion is provided with an arm that is elastically deformed in the thickness direction of the peripheral wall,
The bus bar module according to claim 1, wherein the arm is formed of a part of the peripheral wall by forming a substantially U-shaped slit in the peripheral wall. 前記弾性部が、前記周壁に設けられ、
前記弾性部には、前記周壁の板厚方向に弾性変形するアームが設けられ、
前記アームは、一端が、前記周壁の前記バスバが設けられる側の内面に連続され、他端が前記バスバに向かって延在した自由端となる片持ち板状に設けられていることを特徴とする請求項１記載のバスバモジュール。 The elastic portion is provided on the peripheral wall;
The elastic portion is provided with an arm that is elastically deformed in the thickness direction of the peripheral wall,
The arm is provided with a cantilever plate having one end continuous to the inner surface of the peripheral wall on the side where the bus bar is provided and the other end serving as a free end extending toward the bus bar. The bus bar module according to claim 1. 前記周壁は、互いに対向する対向壁と、該対向壁を連結するとともに、互いに隣り合う前記収容部を仕切る隔壁とで構成され、
前記隔壁には、前記電池の配列方向の両側の面それぞれに、前記アームが設けられていることを特徴とする請求項３記載のバスバモジュール。 The peripheral wall is composed of opposing walls facing each other, and partition walls that connect the opposing walls and partition the accommodating portions adjacent to each other.
The bus bar module according to claim 3, wherein the arm is provided on each of both surfaces of the partition in the arrangement direction of the batteries. 正極及び負極が交互に逆向きに重ね合わされた複数の電池から構成された電池集合体と、
請求項１乃至請求項４のうちいずれか一項に記載されたバスバモジュールと、を備えたことを特徴とする電源装置。 A battery assembly composed of a plurality of batteries in which positive and negative electrodes are alternately stacked in opposite directions;
A power supply device comprising: the bus bar module according to any one of claims 1 to 4.
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