JP6865717B2 - Connection structure between bus bar and electric wire, and bus bar module - Google Patents

Connection structure between bus bar and electric wire, and bus bar module Download PDF

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JP6865717B2
JP6865717B2 JP2018135075A JP2018135075A JP6865717B2 JP 6865717 B2 JP6865717 B2 JP 6865717B2 JP 2018135075 A JP2018135075 A JP 2018135075A JP 2018135075 A JP2018135075 A JP 2018135075A JP 6865717 B2 JP6865717 B2 JP 6865717B2
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bus bar
electric wire
arm
connection
extending
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足立 秀樹
秀樹 足立
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矢崎総業株式会社
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02Soldered or welded connections
    • H01R4/027Soldered or welded connections comprising means for positioning or holding the parts to be soldered or welded
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCBs], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50Fixed connections
    • H01R12/59Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/63Fixed connections for flexible printed circuits, flat or ribbon cables or like structures connecting to another shape cable
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/502Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits
    • H01R25/16Rails or bus-bars provided with a plurality of discrete connecting locations for counterparts
    • H01R25/161Details
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/48Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/50Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw
    • H01R4/5066Clamped connections, spring connections utilising a cam, wedge, cone or ball also combined with a screw mounted in an insulating housing having a cover providing clamping force
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/02Soldered or welded connections
    • H01R4/023Soldered or welded connections between cables or wires and terminals
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Description

本発明は、バスバと電線とを接続治具を用いながら接続したバスバと電線との接続構造、及び、そのような接続構造を用いたバスバモジュールに関する。 The present invention relates to a connection structure between a bus bar and an electric wire in which the bus bar and the electric wire are connected using a connecting jig, and a bus bar module using such a connection structure.
従来から、バスバと電線とを電気的に接続するための接続構造として、バスバ本体から延びるように設けられたアーム部に対し、電線の導体芯線を超音波接合などの接合法によって接続した接続構造が知られている。例えば、従来の接続構造の一つでは、アーム部に対して導体芯線を超音波接合する際、アーム部の側面から延びる延設部を電線に向けて折り曲げ、延設部によって電線をアーム部に押さえ付けるように保持した状態で超音波接合を行うようになっている(例えば、特許文献1を参照)。 Conventionally, as a connection structure for electrically connecting a bus bar and an electric wire, a connection structure in which a conductor core wire of the electric wire is connected to an arm portion provided so as to extend from the bus bar body by a joining method such as ultrasonic bonding. It has been known. For example, in one of the conventional connection structures, when ultrasonically bonding a conductor core wire to an arm portion, an extension portion extending from the side surface of the arm portion is bent toward an electric wire, and the extension portion connects the electric wire to the arm portion. Ultrasonic bonding is performed while holding the cable so as to hold it down (see, for example, Patent Document 1).
特開2016−048635号公報Japanese Unexamined Patent Publication No. 2016-408635
上述した従来の接続構造では、作業者等が延設部を折り曲げて電線をアーム部に押さえ付ける際、アーム部に対する電線の位置が必ずしも設計通りとならない(即ち、位置ズレが生じる)場合がある。また、設計通りの位置に電線が保持されても、延設部の形状が弾性回復する等の理由により、必ずしも十分な保持力が維持されず、超音波接合を行う際などに電線の位置ズレが生じる場合がある。このような理由によってアーム部に対して電線の位置ズレが生じた場合、導体芯線とアーム部とが十分に電気的に接続されず、両者間の電気的接続の信頼性が低下する可能性がある。 In the conventional connection structure described above, when an operator or the like bends the extension portion and presses the electric wire against the arm portion, the position of the electric wire with respect to the arm portion may not always be as designed (that is, a positional deviation occurs). .. Further, even if the electric wire is held at the position as designed, the sufficient holding force is not always maintained due to the elastic recovery of the shape of the extended portion, and the position of the electric wire is displaced when ultrasonically bonding. May occur. If the position of the electric wire is displaced with respect to the arm portion for this reason, the conductor core wire and the arm portion may not be sufficiently electrically connected, and the reliability of the electrical connection between the two may decrease. is there.
本発明は、上述した事情に鑑みてなされたものであり、その目的は、バスバと電線との接続箇所における電気的接続の信頼性を向上することが可能なバスバと電線との接続構造、及び、そのような接続構造を用いたバスバモジュールを提供することにある。 The present invention has been made in view of the above circumstances, and an object of the present invention is a connection structure between a bus bar and an electric wire capable of improving the reliability of electrical connection at a connection point between the bus bar and the electric wire, and a connection structure between the bus bar and the electric wire. , To provide a bus bar module using such a connection structure.
前述した目的を達成するために、本発明に係るバスバと電線との接続構造、及び、バスバモジュールは、下記(1)〜()を特徴としている。
(1)
バスバと電線と接続治具とを備えると共に、前記バスバと前記電線の導体芯線とが電気的に接続された、バスバと電線との接続構造であって、
前記バスバは、
バスバ本体と、前記バスバ本体から延在するアーム部と、を有し、
前記接続治具は、
前記電線を保持した状態で前記アーム部に対して係合することにより、前記アーム部の延在方向及び幅方向における所定位置に前記電線を配置可能に構成され、
前記導体芯線は、
前記所定位置に前記電線が配置された状態で前記バスバに電気的に接続され
前記接続治具は、
前記電線を保持する保持部と、
前記アーム部を前記幅方向において挟むことによって前記アーム部に対する該接続治具の前記幅方向における変位を規制する挟持部と、
前記アーム部が有する被当接部に前記延在方向において当接することによって前記アーム部に対する該接続治具の前記延在方向における変位を規制する当接部と、を有し、
前記アーム部は、
前記被当接部として、前記接続治具の係合位置よりも延出端側に存在する箇所が該アーム部の厚さ方向に湾曲した湾曲箇所と、前記係合位置よりも基端側に存在する箇所の幅が前記係合位置における幅よりも大きい幅広箇所と、を有する、
バスバと電線との接続構造であること。
(2)
上記(1)に記載の接続構造において、
前記アーム部は、
前記バスバ本体から平板状に延在し且つ幅寸法が基端に近付くにつれて徐々に大きくなるテーパ部と、前記テーパ部の延出端から平板状に延在し且つ幅寸法が延出方向に亘って一定である平行部と、前記平行部の延出端部が前記平行部の厚さ方向に湾曲された湾曲部と、から構成され、
前記接続治具は、前記アーム部の前記平行部に係合し、
前記アーム部は、
前記被当接部として、前記接続治具の係合位置よりも延出端側に存在する前記湾曲部と、前記係合位置よりも基端側に存在する前記テーパ部と、を有する、
バスバの電線の接続構造であること。

上記(1)又は上記(2)に記載の接続構造において、
前記導体芯線は、
前記バスバに対して超音波接合され、
前記バスバは、
前記アーム部の基端近傍における前記アーム部の幅が前記基端に近付くにつれて徐々に大きくなることで、前記アーム部の幅方向側面と前記バスバ本体の側面とがなす角度が、前記アーム部の前記基端近傍における幅が均一である場合の前記角度よりも大きい、ように構成された、
バスバと電線との接続構造であること。

複数の単電池で構成された電池集合体に取り付けられる電線配索体と、
前記電線配索体に設けられたバスバ収容部に収容されて保持されると共に、前記電線配索体に配索される電線の導体芯線が電気的に接続されるバスバと、を備えたバスバモジュールであって、
前記バスバと前記電線の前記導体芯線とは、
上記(1)〜上記()の何れか一つに記載の接続構造によって接続される、
バスバモジュールであること。
In order to achieve the above-mentioned object, the connection structure between the bus bar and the electric wire and the bus bar module according to the present invention are characterized by the following (1) to (4).
(1)
It is a connection structure between a bus bar and an electric wire, which is provided with a bus bar, an electric wire, and a connection jig, and the conductor core wire of the bus bar and the electric wire is electrically connected.
The bus bar
It has a bus bar body and an arm portion extending from the bus bar body.
The connection jig
By engaging with the arm portion while holding the electric wire, the electric wire can be arranged at a predetermined position in the extending direction and the width direction of the arm portion.
The conductor core wire is
With the electric wire arranged at the predetermined position, it is electrically connected to the bus bar .
The connection jig
A holding part for holding the electric wire and
A holding portion that regulates the displacement of the connecting jig with respect to the arm portion in the width direction by sandwiching the arm portion in the width direction.
It has an abutting portion that regulates the displacement of the connecting jig with respect to the arm portion in the extending direction by abutting the contacted portion of the arm portion in the extending direction.
The arm portion
As the contacted portion, a portion existing on the extending end side of the engaging position of the connecting jig is curved in the thickness direction of the arm portion and on the proximal end side of the engaging position. It has a wide portion where the width of the existing portion is larger than the width at the engaging position.
It has a connection structure between the bus bar and the electric wire.
(2)
In the connection structure described in (1) above,
The arm portion
A tapered portion that extends from the bus bar body in a flat plate shape and gradually increases as the width dimension approaches the base end, and a flat plate shape that extends from the extending end of the tapered portion and the width dimension extends in the extending direction. It is composed of a parallel portion that is constant and a curved portion in which the extending end portion of the parallel portion is curved in the thickness direction of the parallel portion.
The connecting jig engages with the parallel portion of the arm portion and
The arm portion
The contacted portion includes the curved portion existing on the extending end side of the engaging position of the connecting jig and the tapered portion existing on the proximal end side of the engaging position.
The connection structure of the electric wires of the bus bar.
( 3 )
In the connection structure described in (1) or (2) above,
The conductor core wire is
Ultrasonically bonded to the bus bar
The bus bar
The width of the arm portion in the vicinity of the base end of the arm portion gradually increases as it approaches the base end, so that the angle formed by the widthwise side surface of the arm portion and the side surface of the bus bar main body is the angle of the arm portion. It is configured to be larger than the angle when the width in the vicinity of the base end is uniform.
It has a connection structure between the bus bar and the electric wire.
( 4 )
An electric wire wiring body that can be attached to a battery assembly composed of multiple cells,
A bus bar module including a bus bar that is housed and held in a bus bar accommodating portion provided in the electric wire wiring body, and a bus bar that is electrically connected to a conductor core wire of a wire lined in the wire wiring body. And
The bus bar and the conductor core wire of the electric wire are
It is connected by the connection structure according to any one of the above (1) to ( 3).
Must be a bus module.
上記(1)及び上記(2)の構成のバスバと電線との接続構造によれば、バスバのアーム部に係合可能な接続治具によってバスバに対して電線を固定した上で、電線の導体芯線とバスバとが電気的に接続されることになる。これにより、上述した従来の接続構造に比べ、アーム部に対して電線を設計通りの位置により確実に配置し得ると共に、電線を固定した後にも保持力をより確実に維持し得る。よって、従来の接続構造に比べ、電線の位置ズレを抑制できる。したがって、本構成の接続構造は、バスバと電線との接続箇所における電気的接続の信頼性を向上することが可能である。 According to the connection structure between the bus bar and the electric wire having the above (1) and (2) configurations, the electric wire is fixed to the bus bar by a connecting jig that can be engaged with the arm portion of the bus bar, and then the conductor of the electric wire. The core wire and the bus bar will be electrically connected. As a result, as compared with the conventional connection structure described above, the electric wire can be reliably arranged at the position as designed with respect to the arm portion, and the holding force can be more reliably maintained even after the electric wire is fixed. Therefore, as compared with the conventional connection structure, the misalignment of the electric wire can be suppressed. Therefore, the connection structure of this configuration can improve the reliability of the electrical connection at the connection point between the bus bar and the electric wire.
更に、上記(1)及び上記(2)の構成のバスバと電線との接続構造によれば、接続治具の保持部によって電線を保持しつつ、挟持部および当接部によって接続治具のアーム部に対する位置ズレを抑制できる。なお、保持部、挟持部および当接部は、互いに独立した別々の部材であってそれらを組み付けることによって接続治具を構成してもよく、それらのうちの2つが一体化した部材であってその部材と残りの部材とを組み付けることによって接続治具を構成してもよく、それら全部が一体化した部材であってもよい。 Further, according to the connection structure between the bus bar and the electric wire having the above (1) and (2) configurations, the electric wire is held by the holding portion of the connecting jig, and the arm of the connecting jig is held by the holding portion and the contact portion. Positional deviation with respect to the part can be suppressed. The holding portion, the holding portion, and the abutting portion are separate members that are independent of each other, and a connecting jig may be formed by assembling them, and two of them are integrated members. The connection jig may be formed by assembling the member and the remaining members, or all of them may be integrated members.
更に、上記(1)及び上記(2)の構成のバスバと電線との接続構造によれば、アーム部の湾曲箇所によって接続治具が延出端側に向けて変位することが抑制され、アーム部の幅広箇所によって接続治具が基端側に向けて変位することが抑制される。よって、アーム部に対する接続治具の位置(換言すると、アーム部に対する電線の位置)の位置ズレを抑制できる。 Further, according to the connection structure between the bus bar and the electric wire having the above (1) and (2) configurations, the connecting jig is suppressed from being displaced toward the extension end side due to the curved portion of the arm portion, and the arm The wide portion of the portion prevents the connecting jig from being displaced toward the base end side. Therefore, it is possible to suppress the positional deviation of the position of the connecting jig with respect to the arm portion (in other words, the position of the electric wire with respect to the arm portion).
上記()の構成のバスバと電線との接続構造によれば、アーム部の基端部周辺におけるアーム部の幅方向側面とバスバ本体の側面とがなす角度を、アーム部の幅が均一である場合よりも大きくできる。よって、アーム部の幅が均一である場合に比べ、超音波接合の際にアーム部の基端部に応力集中が生じ難くなる。その結果、応力集中に起因するバスバの損傷などを抑制できる。 According to the connection structure between the bus bar and the electric wire having the above configuration (3 ), the width of the arm portion is uniform so that the angle formed by the widthwise side surface of the arm portion and the side surface of the bus bar body around the base end portion of the arm portion is uniform. Can be larger than in some cases. Therefore, stress concentration is less likely to occur at the base end portion of the arm portion during ultrasonic bonding as compared with the case where the width of the arm portion is uniform. As a result, damage to the bus bar due to stress concentration can be suppressed.
上記()の構成のバスバモジュールによれば、上述した従来の接続構造を用いる場合に比べ、バスバに対する電線の位置ズレが抑制され、バスバと電線との接続箇所における
電気的接続の信頼性が向上されたバスバモジュールが得られることになる。
According to the bus module having the configuration of ( 4 ) above, the misalignment of the electric wire with respect to the bus bar is suppressed as compared with the case of using the conventional connection structure described above, and the reliability of the electrical connection at the connection point between the bus bar and the electric wire is improved. An improved bus module will be obtained.
本発明によれば、バスバと電線との接続箇所における電気的接続の信頼性を向上することが可能なバスバと電線との接続構造、及び、そのような接続構造を用いたバスバモジュールを提供できる。 According to the present invention, it is possible to provide a connection structure between a bus bar and an electric wire capable of improving the reliability of electrical connection at a connection point between the bus bar and the electric wire, and a bus bar module using such a connection structure. ..
以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための形態(以下、「実施形態」という。)を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。 The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings. ..
図1は、本実施形態に係るバスバと電線との接続構造を示す斜視図である。FIG. 1 is a perspective view showing a connection structure between a bus bar and an electric wire according to the present embodiment. 図2(a)は、図1に示す接続構造の主要部分の側面図であり、図2(b)は、その主要部分の平面図であり、図2(c)は、バスバのアーム部の平面図である。2 (a) is a side view of a main part of the connection structure shown in FIG. 1, FIG. 2 (b) is a plan view of the main part, and FIG. 2 (c) is a view of the arm portion of the bus bar. It is a plan view. 図3は、図1に示す接続構造の主要部分の分解斜視図である。FIG. 3 is an exploded perspective view of a main part of the connection structure shown in FIG. 図4(a)は、図3のA部分を幅方向から見たときの拡大側面図であり、図4(b)は、図3のB部分を幅方向から見たときの拡大側面図である。4 (a) is an enlarged side view of the A portion of FIG. 3 when viewed from the width direction, and FIG. 4 (b) is an enlarged side view of the B portion of FIG. 3 when viewed from the width direction. is there. 図5は、図1に示す接続構造が適用されたバスバモジュールが取り付けられた電源装置の平面図である。FIG. 5 is a plan view of a power supply device to which a bus module to which the connection structure shown in FIG. 1 is applied is attached. 図6は、図5に示すバスバモジュールに適用された図1に示す接続構造の周りの平面図である。FIG. 6 is a plan view around the connection structure shown in FIG. 1 applied to the bus module shown in FIG. 図7(a)は、本実施形態の変形例に係るバスバと電線との接続構造の主要部分の分解斜視図であり、図7(b)は、その主要部分の斜視図である。FIG. 7A is an exploded perspective view of a main part of the connection structure between the bus bar and the electric wire according to the modified example of the present embodiment, and FIG. 7B is a perspective view of the main part thereof.
<実施形態>
以下、図面を参照しながら、本発明の実施形態に係るバスバと電線との接続構造、及び、その接続構造を用いたバスバモジュールについて説明する。
<Embodiment>
Hereinafter, the connection structure between the bus bar and the electric wire according to the embodiment of the present invention and the bus bar module using the connection structure will be described with reference to the drawings.
図1〜図4に示すように、本発明の実施形態に係るバスバと電線との接続構造5は、電線1と、バスバ11と、接続治具70と、を備え、電線1の導体芯線2とバスバ11とが電気的に接続された構造を有する。
以下、説明の便宜上、図1〜図4に示すように、x軸方向、y軸方向、及び、z軸方向を定義する。x軸方向、y軸方向、及び、z軸方向は、互いに直交している。x軸方向、y軸方向、及び、z軸方向はそれぞれ、延在方向、幅方向、及び、上下方向とも呼ばれる。以下、先ず、電線1、バスバ11、及び、接続治具70の構造について説明する。
As shown in FIGS. 1 to 4, the connection structure 5 between the bus bar and the electric wire according to the embodiment of the present invention includes the electric wire 1, the bus bar 11, and the connection jig 70, and the conductor core wire 2 of the electric wire 1 is provided. And the bus bar 11 have a structure in which they are electrically connected.
Hereinafter, for convenience of explanation, the x-axis direction, the y-axis direction, and the z-axis direction are defined as shown in FIGS. 1 to 4. The x-axis direction, the y-axis direction, and the z-axis direction are orthogonal to each other. The x-axis direction, the y-axis direction, and the z-axis direction are also referred to as an extension direction, a width direction, and a vertical direction, respectively. Hereinafter, first, the structures of the electric wire 1, the bus bar 11, and the connecting jig 70 will be described.
電線1は、金属製(典型的には、銅製)の導体芯線2と、導体芯線2の外周を覆う樹脂製の絶縁被覆3と、で構成されている。導体芯線2は、本例では、複数本の導体細線の束で構成されているが、1本の導体線で構成されてもよい。電線1の一端から所定長さの範囲では、絶縁被覆3が除去されて導体芯線2が露出している。露出した導体芯線2の先端部2aは、後述するように、バスバ11に対して超音波接合される。 The electric wire 1 is composed of a conductor core wire 2 made of metal (typically made of copper) and a resin insulating coating 3 that covers the outer periphery of the conductor core wire 2. In this example, the conductor core wire 2 is composed of a bundle of a plurality of thin conductor wires, but may be composed of one conductor wire. Within a predetermined length range from one end of the electric wire 1, the insulating coating 3 is removed and the conductor core wire 2 is exposed. The tip 2a of the exposed conductor core wire 2 is ultrasonically bonded to the bus bar 11 as will be described later.
金属製のバスバ11は、バスバ本体12と、アーム部13とを有している。バスバ11は、導電性金属材料(典型的には、アルミ材料)からなる板材に対してプレス加工等を施すことによって形成される。ここで、後述するように、バスバ11を取付対象(例えば、図5の単電池42)に取り付ける際の電気的接続の信頼性を向上する等の観点から、バスバ11は、板材を下面側から上面側に向けて(z軸正方向に)打ち抜くようにプレス加工される。その結果、図4(a)及び図4(b)(図3のA部分およびB部分の拡大側面図)に示すように、バスバ11の端面(打ち抜き面)の上面側端部a1,b1は、打ち抜き方向に向けて延びるように変形している。一方、バスバ11の端面(打ち抜き面)の下面側端部a2,b2は、打ち抜き方向に沿って丸まるように変形している。一般に、前者はバリと呼ばれ、後者はダレと呼ばれる。 The metal bus bar 11 has a bus bar main body 12 and an arm portion 13. The bus bar 11 is formed by press working or the like on a plate material made of a conductive metal material (typically, an aluminum material). Here, as will be described later, from the viewpoint of improving the reliability of the electrical connection when the bus bar 11 is mounted on the mounting target (for example, the cell 42 in FIG. 5), the bus bar 11 attaches the plate material from the lower surface side. It is pressed so as to be punched toward the upper surface side (in the positive direction of the z-axis). As a result, as shown in FIGS. 4 (a) and 4 (b) (enlarged side views of the A portion and the B portion of FIG. 3), the upper surface side end portions a1 and b1 of the end surface (punched surface) of the bus bar 11 are , It is deformed so as to extend in the punching direction. On the other hand, the lower surface side ends a2 and b2 of the end surface (punched surface) of the bus bar 11 are deformed so as to be rounded along the punching direction. Generally, the former is called Bali and the latter is called Dare.
バスバ本体12は、矩形平板状の形状を有している。アーム部13は、バスバ本体12の一側面(x軸負方向側の側面)の幅方向中央部から延在方向の外方(x軸負方向)に向かって一体で延出する矩形平板状の部分である。なお、バスバ本体12の形状は、矩形平板状に限らず、例えば、楕円形平板状等であっても良い。また、必要に応じて、バスバ本体12に貫通孔などが設けられてもよい。 The bus bar main body 12 has a rectangular flat plate shape. The arm portion 13 has a rectangular flat plate shape that integrally extends from the central portion in the width direction of one side surface (side surface on the negative side of the x-axis) of the bus bar main body 12 toward the outside (negative direction of the x-axis) in the extending direction. It is a part. The shape of the bus bar main body 12 is not limited to the rectangular flat plate shape, and may be, for example, an elliptical flat plate shape or the like. Further, if necessary, a through hole or the like may be provided in the bus bar main body 12.
特に、図2(a)、図2(c)、図3及び図4に示すように、アーム部13は、バスバ本体12の一側面から平板状に延出するテーパ部13aと、テーパ部13aの延出端から平板状に連続する平行部13bと、平行部13bの延出端部に位置する湾曲部13cとから構成されている。 In particular, as shown in FIGS. 2 (a), 2 (c), 3 and 4, the arm portion 13 has a tapered portion 13a extending in a flat plate shape from one side surface of the bus bar main body 12 and a tapered portion 13a. It is composed of a parallel portion 13b that is continuous in a flat plate shape from the extending end of the parallel portion 13b and a curved portion 13c located at the extending end portion of the parallel portion 13b.
テーパ部13aの幅寸法は、テーパ部13aの延出端から基端に延在方向に沿って近付くにつれて徐々に大きくなっている。平行部13bの幅寸法は、延在方向に亘って、テーパ部13aの延出端の幅寸法と同じ値で一定である。湾曲部13cは、平行部13bの延出端部が下方向(z軸負方向)に湾曲された部分である。このように湾曲した湾曲部13cを設けることで、図2(a)に示すように、プレス加工時に生じた鋭利なバリ(図4(a)に示す湾曲部13cの端面の上面側端部a1)が電線1に接触しないように、バリ(上面側端部a1)と電線1とを隔離できる。 The width dimension of the tapered portion 13a gradually increases as it approaches the base end from the extending end of the tapered portion 13a along the extending direction. The width dimension of the parallel portion 13b is constant at the same value as the width dimension of the extending end of the tapered portion 13a over the extending direction. The curved portion 13c is a portion in which the extending end portion of the parallel portion 13b is curved in the downward direction (z-axis negative direction). By providing the curved portion 13c curved in this way, as shown in FIG. 2A, sharp burrs generated during press working (the upper end side end portion a1 of the end surface of the curved portion 13c shown in FIG. 4A). ) Can be separated from the burr (upper surface side end a1) and the electric wire 1 so as not to come into contact with the electric wire 1.
また、アーム部13の基端部がテーパ部13aから構成されることで、アーム部13の基端部の幅方向側面とバスバ本体12の一側面とのなす角度θ(図2(c)参照)を、90°よりも大きな角度にすることができる。別の言い方をすると、角度θは、アーム部の幅寸法が延在方向に亘って一定である態様における、アーム部の基端部の幅方向側面とバスバ本体12の一側面とのなす角度(=90°)より大きくなる。 Further, since the base end portion of the arm portion 13 is composed of the tapered portion 13a, the angle θ formed by the widthwise side surface of the base end portion of the arm portion 13 and one side surface of the bus bar main body 12 (see FIG. 2C). ) Can be an angle greater than 90 °. In other words, the angle θ is the angle formed by the widthwise side surface of the base end portion of the arm portion and one side surface of the bus bar main body 12 in a mode in which the width dimension of the arm portion is constant over the extending direction. = 90 °).
樹脂製の接続治具70は、電線1をアーム部13の所定位置に固定するための治具である。接続治具70は、特に図3に示すように、電線ホルダ20と、バスバホルダ30と、から構成されている。 The resin connection jig 70 is a jig for fixing the electric wire 1 at a predetermined position of the arm portion 13. As shown in FIG. 3, the connection jig 70 is composed of an electric wire holder 20 and a bus bar holder 30.
電線ホルダ20は、直方体状のホルダ本体21を有する。ホルダ本体21の下面の幅方向中央部には、半円筒状に窪んだ電線保持部22が延在方向全域に亘って形成されている。ホルダ本体21の幅方向両側面には、延在方向に延びる一対の突起部23が形成されている。電線保持部22の内径は、電線1の絶縁被覆3の外径より若干小さい。このため、電線1(の絶縁被覆3)を電線保持部22に収容することで、電線ホルダ20は電線1を保持可能となっている。 The electric wire holder 20 has a rectangular parallelepiped holder body 21. A semi-cylindrical recessed electric wire holding portion 22 is formed in the central portion of the lower surface of the holder body 21 in the width direction over the entire extending direction. A pair of protrusions 23 extending in the extending direction are formed on both side surfaces of the holder body 21 in the width direction. The inner diameter of the electric wire holding portion 22 is slightly smaller than the outer diameter of the insulating coating 3 of the electric wire 1. Therefore, by accommodating the electric wire 1 (insulation coating 3) in the electric wire holding portion 22, the electric wire holder 20 can hold the electric wire 1.
バスバホルダ30は、矩形平板状の底板部31と、底板部31の幅方向両端部から上方向に延びて幅方向に互いに対向する一対の立壁部32と、で構成されている。各立壁部32は、底板部31の幅方向端部の延在方向両端部から上方に向けて延びる一対の柱部33と、一対の柱部33の上端部同士を一体に連結して延在方向に延びる連結部34と、で構成されている。 The bus bar holder 30 is composed of a rectangular flat plate-shaped bottom plate portion 31 and a pair of standing wall portions 32 extending upward from both ends in the width direction of the bottom plate portion 31 and facing each other in the width direction. Each vertical wall portion 32 extends by integrally connecting a pair of pillar portions 33 extending upward from both ends in the extending direction of the widthwise end portions of the bottom plate portion 31 and upper ends of the pair of pillar portions 33. It is composed of a connecting portion 34 extending in the direction.
一対の立壁部32(より具体的には、柱部33)の幅方向の間隔(幅方向に向かい合う端面同士の幅方向の間隔、以下「挟持幅」と呼ぶ。)は、バスバ11のアーム部13の平行部13bの幅寸法より若干大きく、且つ、底板部31の延在方向の寸法は、平行部13bの延在方向の長さより若干小さい。このため、バスバホルダ30は、バスバ11のアーム部13の平行部13bを、一対の立壁部32の間に挟むように底板部31の上面に載置可能となっている。 The widthwise distance between the pair of standing wall portions 32 (more specifically, the pillar portion 33) (the widthwise distance between the end faces facing each other in the width direction, hereinafter referred to as "holding width") is the arm portion of the bus bar 11. The width dimension of the parallel portion 13b of 13 is slightly larger, and the dimension of the bottom plate portion 31 in the extending direction is slightly smaller than the length of the parallel portion 13b in the extending direction. Therefore, the bus bar holder 30 can be placed on the upper surface of the bottom plate portion 31 so that the parallel portion 13b of the arm portion 13 of the bus bar 11 is sandwiched between the pair of standing wall portions 32.
アーム部13のテーパ部13aの幅寸法は、テーパ部13aの延出端から基端側に若干移動した位置からテーパ部13aの基端までの範囲に亘って、挟持幅より大きい。別の言い方をすると、テーパ部13aの幅寸法は、テーパ部13aの延出端から基端側に若干移動した位置からテーパ部13aの基端までの範囲に亘って、平行部13bの幅よりも大きい。このため、バスバホルダ30がバスバ11の延在方向においてテーパ部13aの基端側に近付くように変位することが、抑制されることになる(詳細は後述される)。電線ホルダ20のホルダ本体21(直方体状の部分)の幅方向寸法は、挟持幅より若干小さく、一対の突起部23の突出端同士の幅方向寸法は、挟持幅より若干大きい。突起部23の延在方向寸法は、一対の柱部33の延在方向の間隔(延在方向に向かい合う端面同士の延在方向の間隔)より小さい。
以上、電線1、バスバ11、及び、接続治具70それぞれの構造について説明した。
The width dimension of the tapered portion 13a of the arm portion 13 is larger than the holding width over the range from the position slightly moved from the extending end of the tapered portion 13a to the proximal end side to the proximal end of the tapered portion 13a. In other words, the width dimension of the tapered portion 13a is from the width of the parallel portion 13b over the range from the position slightly moved from the extending end of the tapered portion 13a to the proximal end side to the proximal end of the tapered portion 13a. Is also big. Therefore, the displacement of the bus bar holder 30 so as to approach the proximal end side of the tapered portion 13a in the extending direction of the bus bar 11 is suppressed (details will be described later). The width direction dimension of the holder body 21 (rectangular parallelepiped portion) of the electric wire holder 20 is slightly smaller than the sandwiching width, and the width direction dimension between the protruding ends of the pair of protrusions 23 is slightly larger than the sandwiching width. The dimension of the protrusion 23 in the extending direction is smaller than the distance between the pair of pillars 33 in the extending direction (the distance between the end faces facing the extending direction in the extending direction).
The structures of the electric wire 1, the bus bar 11, and the connecting jig 70 have been described above.
次いで、電線1の導体芯線2をバスバ11に電気的に接続させて接続構造5(図1を参照)を得るための手順について、図2(a)〜図2(c)及び図3を参照しながら説明する。先ず、図3に示すように、電線1の一端部における露出した導体芯線2の近傍に位置する絶縁被覆3を、電線ホルダ20の電線保持部22に収容することで、電線ホルダ20に電線1を保持させる。電線1の露出した導体芯線2は、ホルダ本体21から延在方向の外方(x軸正方向側)へ突出している。 Next, refer to FIGS. 2 (a) to 2 (c) and FIG. 3 for the procedure for electrically connecting the conductor core wire 2 of the electric wire 1 to the bus bar 11 to obtain the connection structure 5 (see FIG. 1). I will explain while. First, as shown in FIG. 3, by accommodating the insulating coating 3 located in the vicinity of the exposed conductor core wire 2 at one end of the electric wire 1 in the electric wire holding portion 22 of the electric wire holder 20, the electric wire 1 is accommodated in the electric wire holder 20. To hold. The exposed conductor core wire 2 of the electric wire 1 projects outward from the holder main body 21 in the extending direction (x-axis positive direction side).
次いで、バスバホルダ30は、バスバ11のアーム部13の平行部13bを、一対の立壁部32の間に挟むように底板部31の上面に載置する。次いで、アーム部13が載置されたバスバホルダ30の一対の立壁部32の間の空間に向けて、電線1を保持した電線ホルダ20のホルダ本体21を、上方から下方に向けて押し込む。 Next, the bus bar holder 30 places the parallel portion 13b of the arm portion 13 of the bus bar 11 on the upper surface of the bottom plate portion 31 so as to be sandwiched between the pair of standing wall portions 32. Next, the holder body 21 of the electric wire holder 20 holding the electric wire 1 is pushed downward from above toward the space between the pair of standing wall portions 32 of the bus bar holder 30 on which the arm portion 13 is placed.
このとき、先ず、一対の突起部23が一対の立壁部32(より具体的には、一対の連結部34)を押圧することで、一対の立壁部32が幅方向外側(互いに離間する方向)へ弾性変形する。ホルダ本体21を更に押し込むことで、一対の突起部23が一対の連結部34の下側に入り込むと(図2(a)参照)、弾性変形していた一対の立壁部32の形状が弾性回復する。 At this time, first, the pair of protrusions 23 presses the pair of standing wall portions 32 (more specifically, the pair of connecting portions 34), so that the pair of standing wall portions 32 are outside in the width direction (directions separated from each other). Elastically deforms to. When the pair of protrusions 23 enters the lower side of the pair of connecting portions 34 by further pushing the holder body 21 (see FIG. 2A), the shape of the pair of standing wall portions 32 that have been elastically deformed recovers elastically. To do.
このように立壁部32の形状が弾性回復すると、一対の突起部23と一対の連結部34とが係合した状態に保持される。この結果、アーム部13の平行部13bが、電線ホルダ20とバスバホルダ30とによって上下方向に挟持された状態に保持されることで、電線1の露出した導体芯線2がアーム部13の上面にて延在方向に沿うように、電線1がアーム部13の上面上の所定位置(例えば、設計通りの位置)に適正に固定される。 When the shape of the standing wall portion 32 is elastically restored in this way, the pair of protrusions 23 and the pair of connecting portions 34 are held in an engaged state. As a result, the parallel portion 13b of the arm portion 13 is held in a state of being sandwiched in the vertical direction by the electric wire holder 20 and the bus bar holder 30, so that the exposed conductor core wire 2 of the electric wire 1 is placed on the upper surface of the arm portion 13. The electric wire 1 is properly fixed at a predetermined position (for example, a position as designed) on the upper surface of the arm portion 13 so as to follow the extending direction.
この状態では、一対の立壁部32がアーム部13を幅方向において挟むことによって、アーム部13に対する接続治具70(電線ホルダ20+バスバホルダ30)の幅方向における変位が規制される。更に、バスバホルダ30の底板部31の延在方向の一端面(x軸負方向側の端面)が、アーム部13の湾曲部13cに延在方向において当接することによって、アーム部13に対する接続治具70(電線ホルダ20+バスバホルダ30)の延在方向の一端側(x軸負方向側)への変位が規制される。加えて、バスバホルダ30の一対の立壁部32(より具体的には、柱部33)の延在方向の他端側端部(x軸正方向側の端部)が、アーム部13のテーパ部13aの幅方向側面に延在方向において当接することによって、アーム部13に対する接続治具70(電線ホルダ20+バスバホルダ30)の延在方向の他端側(x軸正方向側)への変位が規制される。 In this state, the pair of standing wall portions 32 sandwich the arm portion 13 in the width direction, so that the displacement of the connecting jig 70 (electric wire holder 20 + bus bar holder 30) with respect to the arm portion 13 in the width direction is regulated. Further, one end surface (the end surface on the negative side of the x-axis) of the bottom plate portion 31 of the bus bar holder 30 in the extending direction comes into contact with the curved portion 13c of the arm portion 13 in the extending direction, thereby connecting the connecting jig to the arm portion 13. Displacement of 70 (wire holder 20 + bus bar holder 30) to one end side (x-axis negative direction side) in the extending direction is restricted. In addition, the other end of the pair of vertical wall portions 32 (more specifically, the pillar portion 33) of the bus bar holder 30 in the extending direction (the end on the positive direction side of the x-axis) is the tapered portion of the arm portion 13. By abutting the side surface in the width direction of 13a in the extending direction, the displacement of the connection jig 70 (wire holder 20 + bus bar holder 30) to the arm portion 13 toward the other end side (x-axis positive direction side) in the extending direction is restricted. Will be done.
なお、本実施形態において、ホルダ本体21及び底板部31が本発明における「保持部」に相当し、一対の立壁部32が本発明における「挟持部」に相当し、底板部31の延在方向の一端面(x軸負方向側の端面)及び一対の立壁部32の延在方向の他端側端部(x軸正方向側の端部)が本発明における「当接部」に相当し、アーム部13の湾曲部13cが本発明における「被当接部」及び「湾曲箇所」に相当し、アーム部13のテーパ部13aが本発明における「被当接部」及び「幅広箇所」に相当し、アーム部13の平行部13bが本発明における「係合位置」に相当する。 In the present embodiment, the holder body 21 and the bottom plate portion 31 correspond to the "holding portion" in the present invention, the pair of standing wall portions 32 correspond to the "holding portion" in the present invention, and the extending direction of the bottom plate portion 31. One end surface (end surface on the negative side of the x-axis) and the other end side of the pair of standing wall portions 32 in the extending direction (end surface on the positive direction side of the x-axis) correspond to the "contact portion" in the present invention. The curved portion 13c of the arm portion 13 corresponds to the "contacted portion" and the "curved portion" in the present invention, and the tapered portion 13a of the arm portion 13 corresponds to the "contacted portion" and the "wide portion" in the present invention. Correspondingly, the parallel portion 13b of the arm portion 13 corresponds to the "engagement position" in the present invention.
次いで、上述のように、電線1がアーム部13の上面上の所定位置に固定された状態で、電線1の露出した導体芯線2の先端部2aを、アーム部13の上面に公知の手法を用いて接合する。この接合手法として、典型的には超音波接合が採用され得るが、これに限定されず、ハンダ付け等の他の接合手法が用いられてもよい。
以上の手順を経て、図1に示す上記実施形態に係る接続構造5が得られる。
Next, as described above, with the electric wire 1 fixed at a predetermined position on the upper surface of the arm portion 13, the tip portion 2a of the exposed conductor core wire 2 of the electric wire 1 is attached to the upper surface of the arm portion 13 by a known method. Join using. As this bonding method, ultrasonic bonding can be typically adopted, but the method is not limited to this, and other bonding methods such as soldering may be used.
Through the above procedure, the connection structure 5 according to the above embodiment shown in FIG. 1 is obtained.
次いで、上記実施形態に係る接続構造5をバスバモジュール41に適用した場合について、図5及び図6を参照しながら説明する。 Next, a case where the connection structure 5 according to the above embodiment is applied to the bus module 41 will be described with reference to FIGS. 5 and 6.
図5に示すように、バスバモジュール41は、複数の単電池42からなる電池集合体43に重ねて取り付けられて電源装置44を構成する。電源装置44は、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を併用して走行するハイブリッド自動車等に搭載されて用いられ、電動モータに動力を供給するようになっている。 As shown in FIG. 5, the bus module 41 is mounted so as to be stacked on a battery assembly 43 composed of a plurality of cell cells 42 to form a power supply device 44. The power supply device 44 is mounted on, for example, an electric vehicle traveling by using an electric motor, a hybrid vehicle traveling by using an engine and an electric motor in combination, and the like, and supplies power to the electric motor. ..
バスバモジュール41は、樹脂製の電線配索体45を備えており、この電線配索体45にバスバ11が保持されている(特に、図6を参照)。バスバ11は、電池集合体43を構成する複数の単電池42のそれぞれから突出した電極(図示省略)に溶接されている。更に、バスバ11には、例えば、電圧検知装置(図示略)に繋がる電線1の端末が接続されている。なお、バスバ11と単電池42の電極とは、必ずしも溶接される必要はなく、例えば、バスバ11に設けた貫通孔に単電池42の電極を挿通させた状態でナット等によって両者を締結してもよい。ここで、溶接の場合であっても締結の場合であっても、図4(b)に示すように、プレス加工時に生じたダレ(バスバ本体12の端面の下面側端部b2)が単電池42に向かい合うことになる。よって、バリ(上面側端部b1)が単電池42に向かい合う場合に比べ、バスバ本体12の下面と単電池42とをより適正に密着させることができ、バスバ11と単電池42との電気的接続の信頼性を向上し得る。 The bus bar module 41 includes a resin wire liner 45, and the bus bar 11 is held by the wire liner 45 (particularly, see FIG. 6). The bus bar 11 is welded to electrodes (not shown) protruding from each of the plurality of cell cells 42 constituting the battery assembly 43. Further, for example, the terminal of the electric wire 1 connected to the voltage detection device (not shown) is connected to the bus bar 11. The bus bar 11 and the electrode of the cell 42 do not necessarily have to be welded. For example, the electrode of the cell 42 is inserted into the through hole provided in the bus bar 11 and fastened with a nut or the like. May be good. Here, regardless of whether welding or fastening, as shown in FIG. 4B, the sagging (lower surface side end b2 of the end surface of the bus bar main body 12) generated during press working is a cell cell. You will face 42. Therefore, as compared with the case where the burr (upper surface side end b1) faces the cell 42, the lower surface of the bus bar main body 12 and the cell 42 can be brought into close contact with each other more appropriately, and the bus bar 11 and the cell 42 are electrically connected to each other. It can improve the reliability of the connection.
図6に示すように、電線配索体45は、枠状に形成されたバスバ収容部51を有しており、このバスバ収容部51にバスバ11のバスバ本体12が収容されて保持されている。バスバ収容部51を構成する周壁53は、その一部が開放されており、この開放された部分には、バスバ11のアーム部13が位置している。 As shown in FIG. 6, the electric wire wiring body 45 has a bus bar accommodating portion 51 formed in a frame shape, and the bus bar main body 12 of the bus bar 11 is accommodated and held in the bus bar accommodating portion 51. .. A part of the peripheral wall 53 constituting the bus bar accommodating portion 51 is open, and the arm portion 13 of the bus bar 11 is located in this open portion.
電線配索体45は、バスバ収容部51の前記開放部分に繋がる電線配索溝55を有しており、この電線配索溝55には、電線1が収容されている。電線配索溝55は、その両側が一対の側壁56A,56Bで構成されている。電線配索溝55には、内部に収容された電線1を保持する電線保持部61が設けられている。 The electric wire distribution body 45 has an electric wire distribution groove 55 connected to the open portion of the bus bar accommodating portion 51, and the electric wire 1 is accommodated in the electric wire distribution groove 55. The electric wire distribution groove 55 is composed of a pair of side walls 56A and 56B on both sides thereof. The electric wire distribution groove 55 is provided with an electric wire holding portion 61 for holding the electric wire 1 housed therein.
図6に示すように、電線配索体45は、バスバ収容部51の前記開放部分に、一対の支持壁52を有している。これらの支持壁52は、バスバ本体12から延びるアーム部13の延在方向と直交する両側部に設けられており、電線1及びアーム部13を保持するバスバホルダ30の一対の立壁部32を幅方向において挟持している。 As shown in FIG. 6, the electric wire wiring body 45 has a pair of support walls 52 in the open portion of the bus bar accommodating portion 51. These support walls 52 are provided on both sides orthogonal to the extending direction of the arm portion 13 extending from the bus bar main body 12, and a pair of standing wall portions 32 of the bus bar holder 30 holding the electric wire 1 and the arm portion 13 are provided in the width direction. I'm holding it in.
これにより、電線1の取り回しの際などに電線1が引っ張られることで、アーム部13に、その延在方向と直交する方向(y軸方向)の外力が作用したとしても、アーム部13の両側部が電線配索体45の支持壁52によって支持されているので、外力によるアーム部13の変形を抑制できる。また、このように外力が作用したとしても、接続治具70によって電線1が保持されているため、外力が導体芯線2の先端部2a(超音波接合された箇所)に直接は及ばない。よって、先端部2aがバスバ11から離れることを抑制できる。これらの結果、電線1とバスバ11との間の電気的接続の信頼性をより高めることができる。 As a result, even if the electric wire 1 is pulled when the electric wire 1 is routed and an external force acts on the arm portion 13 in the direction orthogonal to the extending direction (y-axis direction), both sides of the arm portion 13 Since the portion is supported by the support wall 52 of the electric wire wiring body 45, deformation of the arm portion 13 due to an external force can be suppressed. Further, even if an external force acts in this way, since the electric wire 1 is held by the connecting jig 70, the external force does not directly reach the tip portion 2a (ultrasonically bonded portion) of the conductor core wire 2. Therefore, it is possible to prevent the tip portion 2a from separating from the bus bar 11. As a result, the reliability of the electrical connection between the electric wire 1 and the bus bar 11 can be further improved.
以上に説明したように、本発明の実施形態に係るバスバと電線との接続構造5、及び、バスバモジュール41によれば、バスバ11のアーム部13に係合可能な接続治具70(電線ホルダ20+バスバホルダ30)によって電線1の位置を固定した上で、電線1の導体芯線2とバスバ11とが電気的に接続される。これにより、従来の接続構造に比べ、電線1の位置ズレが生じにくい。この結果、バスバ11と電線1との接続箇所における電気的接続の信頼性を適正に維持することができる。 As described above, according to the connection structure 5 between the bus bar and the electric wire according to the embodiment of the present invention and the bus bar module 41, the connection jig 70 (electric wire holder) that can be engaged with the arm portion 13 of the bus bar 11 After fixing the position of the electric wire 1 with the 20 + bus bar holder 30), the conductor core wire 2 of the electric wire 1 and the bus bar 11 are electrically connected. As a result, the position of the electric wire 1 is less likely to be displaced as compared with the conventional connection structure. As a result, the reliability of the electrical connection at the connection point between the bus bar 11 and the electric wire 1 can be properly maintained.
更に、一対の立壁部32がアーム部13を幅方向において挟むことによって、アーム部13に対する接続治具70の幅方向における変位が規制される。バスバホルダ30の底板部31の延在方向の一端面(x軸負方向側の端面)が、アーム部13の湾曲部13cに延在方向において当接することによって、アーム部13に対する接続治具70の延在方向の一端側(x軸負方向側)への変位が規制される。バスバホルダ30の一対の立壁部32の延在方向の他端側端部(x軸正方向側の端部)が、アーム部13のテーパ部13aの幅方向側面に延在方向において当接することによって、アーム部13に対する接続治具70の延在方向の他端側(x軸正方向側)への変位が規制される。この結果、接続治具70のアーム部13に対する位置ズレを確実に抑制できる。この結果、導体芯線2をバスバ11に接続する際の電線1の位置ズレをより確実に抑制できる。また、湾曲部13cの端面の上面側端部a1(プレス加工に起因するバリ)が電線1から隔離されることで、鋭利な形状を有し得る上面側端部a1によって電線1が傷付くことを抑制できる。 Further, by sandwiching the arm portion 13 in the width direction between the pair of standing wall portions 32, the displacement of the connecting jig 70 with respect to the arm portion 13 in the width direction is regulated. One end surface of the bottom plate portion 31 of the bus bar holder 30 in the extending direction (the end surface on the negative direction side of the x-axis) abuts on the curved portion 13c of the arm portion 13 in the extending direction, whereby the connecting jig 70 to the arm portion 13 Displacement to one end side (x-axis negative direction side) in the extending direction is regulated. The other end of the pair of standing wall portions 32 of the bus bar holder 30 in the extending direction (the end on the positive side of the x-axis) abuts on the lateral side surface of the tapered portion 13a of the arm portion 13 in the extending direction. , The displacement of the connecting jig 70 with respect to the arm portion 13 toward the other end side (x-axis positive direction side) in the extending direction is restricted. As a result, the positional deviation of the connecting jig 70 with respect to the arm portion 13 can be reliably suppressed. As a result, the misalignment of the electric wire 1 when the conductor core wire 2 is connected to the bus bar 11 can be suppressed more reliably. Further, since the upper surface side end portion a1 (burr caused by press working) of the end surface of the curved portion 13c is isolated from the electric wire 1, the electric wire 1 is damaged by the upper surface side end portion a1 which can have a sharp shape. Can be suppressed.
更に、アーム部13の基端部周辺において、アーム部13(テーパ部13a)の幅方向側面とバスバ本体12の側面とがなす角度θ(図2(c)参照)を、アーム部の幅が均一である場合よりも大きくできる。その結果、超音波接合の際にアーム部13の基端部に応力集中が生じにくくなり、応力集中に起因するバスバの損傷などを抑制できる。 Further, the width of the arm portion determines the angle θ (see FIG. 2C) formed by the widthwise side surface of the arm portion 13 (tapered portion 13a) and the side surface of the bus bar main body 12 around the base end portion of the arm portion 13. It can be larger than if it were uniform. As a result, stress concentration is less likely to occur at the base end portion of the arm portion 13 during ultrasonic bonding, and damage to the bass due to stress concentration can be suppressed.
<他の形態>
なお、本発明は上記各実施形態に限定されることはなく、本発明の範囲内において種々の変形例を採用することができる。例えば、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。
<Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, dimensions, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.
例えば、上記実施形態では、図3等に示すように、接続治具70として、電線ホルダ20とバスバホルダ30という2つの部品が使用されている。これに対し、図7(a)及び図7(b)に示すように、接続治具70として、電線ホルダ20という1つの部品のみが使用されてもよい。 For example, in the above embodiment, as shown in FIG. 3 and the like, two parts, an electric wire holder 20 and a bus bar holder 30, are used as the connection jig 70. On the other hand, as shown in FIGS. 7 (a) and 7 (b), only one component called the electric wire holder 20 may be used as the connection jig 70.
図7(a)及び図7(b)に示す態様では、電線ホルダ20のホルダ本体21には、ホルダ本体21の幅方向両側面から下方に一体で延びて幅方向に互いに対向する一対の垂下部24が形成されている。各垂下部24の延出端部(下端部)には、幅方向内側に突出する突起部25が一体で形成されている。 In the embodiment shown in FIGS. 7 (a) and 7 (b), the holder body 21 of the electric wire holder 20 is integrally extended downward from both side surfaces in the width direction of the holder body 21, and a pair of hanging hangings facing each other in the width direction. The portion 24 is formed. At the extending end (lower end) of each hanging portion 24, a protruding portion 25 projecting inward in the width direction is integrally formed.
この態様では、電線1をアーム部13の上面上の所定位置に固定する際、先ず、アーム部13の平行部13bに向けて、電線1を保持した電線ホルダ20のホルダ本体21を、上方から下方に向けて押し込む。このとき、先ず、一対の突起部25がアーム部13の平行部13bの幅方向端面から押圧されることで、一対の垂下部24が幅方向外側(互いに離間する方向)へ弾性変形する。ホルダ本体21を更に押し込むことで、一対の突起部25が平行部13bの下側に入り込むと、弾性変形していた一対の垂下部24の形状が弾性回復する。 In this embodiment, when fixing the electric wire 1 at a predetermined position on the upper surface of the arm portion 13, first, the holder main body 21 of the electric wire holder 20 holding the electric wire 1 is viewed from above toward the parallel portion 13b of the arm portion 13. Push it downward. At this time, first, the pair of protrusions 25 are pressed from the widthwise end faces of the parallel portions 13b of the arm portion 13, so that the pair of hanging portions 24 are elastically deformed outward in the width direction (directions separated from each other). By further pushing the holder body 21, when the pair of protrusions 25 enters the lower side of the parallel portion 13b, the shape of the pair of hanging portions 24 that have been elastically deformed is elastically restored.
このように垂下部24が復元すると、一対の突起部25とアーム部13の平行部13bとが係合した状態に保持される。この結果、電線ホルダ20がアーム部13に保持されることで、電線1がアーム部13の上面上の所定位置に固定される。 When the hanging portion 24 is restored in this way, the pair of protrusions 25 and the parallel portion 13b of the arm portion 13 are held in an engaged state. As a result, the electric wire holder 20 is held by the arm portion 13, so that the electric wire 1 is fixed at a predetermined position on the upper surface of the arm portion 13.
更に、上述した実施形態では、アーム部13の延出端部に湾曲部13cを設けている。しかし、接続治具70がアーム部13の延出端側へ変位することを規制するための構造は、湾曲部13cに限られない。例えば、接続治具70の係合箇所よりも延出端側にあるアーム部13の部位の幅を、接続治具70の挟持幅よりも大きくする(平行部13bの幅よりも大きくする)ことで、接続治具70の変位を規制してもよい。同様に、接続治具70がアーム部13の基端側へ変位することを規制するための構造は、テーパ部13aに限られない。例えば、接続治具70の係合箇所よりも基端側にあるアーム部13の所定箇所に突起などを設け、この突起と接続治具70とを当接させることで、接続治具70の変位を規制してもよい。なお、プレス加工に起因するバリから電線1を隔離する点において湾曲部13cはこれら形態に比べて有利であるが、バリと電線1との接触を許容し得る場合、これら形態は加工が容易である等の点において湾曲部13cに比べて有利である。 Further, in the above-described embodiment, the curved portion 13c is provided at the extending end portion of the arm portion 13. However, the structure for restricting the connection jig 70 from being displaced toward the extending end side of the arm portion 13 is not limited to the curved portion 13c. For example, the width of the portion of the arm portion 13 on the extending end side of the engaging portion of the connecting jig 70 is made larger than the sandwiching width of the connecting jig 70 (larger than the width of the parallel portion 13b). Therefore, the displacement of the connecting jig 70 may be regulated. Similarly, the structure for restricting the connection jig 70 from being displaced toward the proximal end side of the arm portion 13 is not limited to the tapered portion 13a. For example, a protrusion or the like is provided at a predetermined position of the arm portion 13 on the base end side of the engagement portion of the connection jig 70, and the protrusion and the connection jig 70 are brought into contact with each other to displace the connection jig 70. May be regulated. The curved portion 13c is more advantageous than these forms in that the electric wire 1 is isolated from burrs caused by press working, but when the burr and the electric wire 1 can be allowed to come into contact with each other, these forms are easy to process. It is advantageous over the curved portion 13c in some respects.
ここで、上述した本発明に係るバスバと電線との接続構造5、及び、バスバモジュール41の実施形態の特徴をそれぞれ以下(1)〜(5)に簡潔に纏めて列記する。
(1)
バスバ(11)と電線(1)とを接続治具(70)とを備えると共に、前記バスバ(11)と前記電線(1)の導体芯線(2)とが電気的に接続された、バスバと電線との接続構造(5)であって、
前記バスバ(11)は、
バスバ本体(12)と、前記バスバ本体(12)から延在するアーム部(13)と、を有し、
前記接続治具(70)は、
前記電線(1)を保持した状態で前記アーム部(13)に対して係合することにより、前記アーム部(13)の延在方向及び幅方向における所定位置に前記電線(1)を配置可能に構成され、
前記導体芯線(2)は、
前記所定位置に前記電線(1)が配置された状態で前記バスバ(11)に電気的に接続される、
バスバと電線との接続構造。
(2)
上記(1)に記載の接続構造において、
前記接続治具(70)は、
前記電線(1)を保持する保持部(21,31)と、
前記アーム部(13)を前記幅方向において挟むことによって前記アーム部(13)に対する該接続治具(70)の前記幅方向における変位を規制する挟持部(32)と、
前記アーム部(13)が有する被当接部(13a,13c)に前記延在方向において当接することによって前記アーム部(13)に対する該接続治具(70)の前記延在方向における変位を規制する当接部と、を有する、
バスバと電線との接続構造。
(3)
上記(2)に記載の接続構造において、
前記アーム部(13)は、
前記被当接部として、前記接続治具(70)の係合位置(13b)よりも延出端側に存在する箇所が該アーム部(13)の厚さ方向に湾曲した湾曲箇所(13c)と、前記係合位置(13b)よりも基端側に存在する箇所の幅が前記係合位置における前記挟持部(32)の挟持幅よりも大きい幅広箇所(13a)と、を有する、
バスバと電線との接続構造。
(4)
上記(1)〜上記(3)の何れか一つに記載の接続構造において、
前記導体芯線(2)は、
前記バスバ(11)に対して超音波接合され、
前記バスバ(11)は、
前記アーム部(13)の基端近傍における前記アーム部(13)の幅が前記基端に近付くにつれて徐々に大きくなることで、前記アーム部(13)の幅方向側面と前記バスバ本体(12)の側面とがなす角度(θ)が、前記アーム部(13)の前記基端近傍における幅が均一である場合の前記角度よりも大きい、ように構成された、
バスバと電線との接続構造。
(5)
複数の単電池(42)で構成された電池集合体(43)に取り付けられる電線配索体(45)と、
前記電線配索体(45)に設けられたバスバ収容部(51)に収容されて保持されると共に、前記電線配索体に配索される電線(1)の導体芯線(2)が電気的に接続されるバスバ(11)と、を備えたバスバモジュール(41)であって、
前記バスバ(11)と前記電線(1)の導体芯線(2)とが、上記(1)〜上記(4)の何れか一つに記載の接続構造(5)によって接続されている、
バスバモジュール。
Here, the features of the above-described connection structure 5 between the bus bar and the electric wire and the embodiment of the bus bar module 41 according to the present invention are briefly summarized and listed below (1) to (5), respectively.
(1)
A bus bar (11) and an electric wire (1) are provided with a connecting jig (70), and the bus bar (11) and the conductor core wire (2) of the electric wire (1) are electrically connected to the bus bar. It is a connection structure (5) with an electric wire.
The bus bar (11)
It has a bus bar main body (12) and an arm portion (13) extending from the bus bar main body (12).
The connection jig (70)
By engaging with the arm portion (13) while holding the electric wire (1), the electric wire (1) can be arranged at a predetermined position in the extending direction and the width direction of the arm portion (13). Consists of
The conductor core wire (2) is
The electric wire (1) is electrically connected to the bus bar (11) in a state where the electric wire (1) is arranged at the predetermined position.
Connection structure between bus bar and electric wire.
(2)
In the connection structure described in (1) above,
The connection jig (70)
Holding portions (21, 31) for holding the electric wire (1) and
A holding portion (32) that regulates the displacement of the connecting jig (70) with respect to the arm portion (13) in the width direction by sandwiching the arm portion (13) in the width direction.
By abutting the contacted portions (13a, 13c) of the arm portion (13) in the extending direction, the displacement of the connecting jig (70) with respect to the arm portion (13) in the extending direction is regulated. With a contact part,
Connection structure between bus bar and electric wire.
(3)
In the connection structure described in (2) above,
The arm portion (13) is
As the contacted portion, a curved portion (13c) in which a portion existing on the extending end side of the engaging position (13b) of the connecting jig (70) is curved in the thickness direction of the arm portion (13). And a wide portion (13a) in which the width of the portion existing on the proximal end side of the engaging position (13b) is larger than the sandwiching width of the sandwiching portion (32) at the engaging position.
Connection structure between bus bar and electric wire.
(4)
In the connection structure according to any one of (1) to (3) above,
The conductor core wire (2) is
Ultrasonically bonded to the bus bar (11)
The bus bar (11)
The width of the arm portion (13) in the vicinity of the proximal end of the arm portion (13) gradually increases as it approaches the proximal end, so that the lateral side surface of the arm portion (13) and the bus bar main body (12) The angle (θ) formed by the side surface of the arm portion (13) is larger than the angle when the width in the vicinity of the base end of the arm portion (13) is uniform.
Connection structure between bus bar and electric wire.
(5)
An electric wire wiring body (45) attached to a battery assembly (43) composed of a plurality of cell cells (42), and
The conductor core wire (2) of the electric wire (1) that is accommodated and held in the bus bar accommodating portion (51) provided in the electric wire arrangement body (45) and is arranged in the electric wire arrangement body is electrically connected. It is a bus bar module (41) provided with a bus bar (11) connected to the cable.
The bus bar (11) and the conductor core wire (2) of the electric wire (1) are connected by the connection structure (5) according to any one of the above (1) to (4).
Bus bar module.
1 電線
2 導体芯線
5 接続構造
11 バスバ
12 バスバ本体
13 アーム部
13a テーパ部(被当接部、幅広箇所)
13b 平行部(係合位置)
13c 湾曲部(被当接部、湾曲箇所)
20 電線ホルダ(接続治具)
21 ホルダ本体(保持部)
30 バスバホルダ(接続治具)
31 底板部(保持部)
32 立壁部(挟持部)
42 単電池
43 電池集合体
45 電線配索体
51 バスバ収容部
70 接続治具
1 Electric wire 2 Conductor core wire 5 Connection structure 11 Bus bar 12 Bus bar body 13 Arm part 13a Tapered part (contacted part, wide part)
13b Parallel part (engagement position)
13c Curved part (contacted part, curved part)
20 Electric wire holder (connection jig)
21 Holder body (holding part)
30 Bus bar holder (connection jig)
31 Bottom plate (holding part)
32 Standing wall (holding part)
42 Single battery 43 Battery assembly 45 Electric wire wiring body 51 Bus bar accommodating part 70 Connection jig

Claims (4)

  1. バスバと電線と接続治具とを備えると共に、前記バスバと前記電線の導体芯線とが電気的に接続された、バスバと電線との接続構造であって、
    前記バスバは、
    バスバ本体と、前記バスバ本体から延在するアーム部と、を有し、
    前記接続治具は、
    前記電線を保持した状態で前記アーム部に対して係合することにより、前記アーム部の延在方向及び幅方向における所定位置に前記電線を配置可能に構成され、
    前記導体芯線は、
    前記所定位置に前記電線が配置された状態で前記バスバに電気的に接続され
    前記接続治具は、
    前記電線を保持する保持部と、
    前記アーム部を前記幅方向において挟むことによって前記アーム部に対する該接続治具の前記幅方向における変位を規制する挟持部と、
    前記アーム部が有する被当接部に前記延在方向において当接することによって前記アーム部に対する該接続治具の前記延在方向における変位を規制する当接部と、を有し、
    前記アーム部は、
    前記被当接部として、前記接続治具の係合位置よりも延出端側に存在する箇所が該アーム部の厚さ方向に湾曲した湾曲箇所と、前記係合位置よりも基端側に存在する箇所の幅が前記係合位置における幅よりも大きい幅広箇所と、を有する、
    バスバと電線との接続構造。
    It is a connection structure between a bus bar and an electric wire, which is provided with a bus bar, an electric wire, and a connection jig, and the conductor core wire of the bus bar and the electric wire is electrically connected.
    The bus bar
    It has a bus bar body and an arm portion extending from the bus bar body.
    The connection jig
    By engaging with the arm portion while holding the electric wire, the electric wire can be arranged at a predetermined position in the extending direction and the width direction of the arm portion.
    The conductor core wire is
    With the electric wire arranged at the predetermined position, it is electrically connected to the bus bar .
    The connection jig
    A holding part for holding the electric wire and
    A holding portion that regulates the displacement of the connecting jig with respect to the arm portion in the width direction by sandwiching the arm portion in the width direction.
    It has an abutting portion that regulates the displacement of the connecting jig with respect to the arm portion in the extending direction by abutting the contacted portion of the arm portion in the extending direction.
    The arm portion
    As the contacted portion, a portion existing on the extending end side of the engaging position of the connecting jig is curved in the thickness direction of the arm portion and on the proximal end side of the engaging position. It has a wide portion where the width of the existing portion is larger than the width at the engaging position.
    Connection structure between bus bar and electric wire.
  2. 請求項1に記載の接続構造において、
    前記アーム部は、
    前記バスバ本体から平板状に延在し且つ幅寸法が基端に近付くにつれて徐々に大きくなるテーパ部と、前記テーパ部の延出端から平板状に延在し且つ幅寸法が延出方向に亘って一定である平行部と、前記平行部の延出端部が前記平行部の厚さ方向に湾曲された湾曲部と、から構成され、
    前記接続治具は、前記アーム部の前記平行部に係合し、
    前記アーム部は、
    前記被当接部として、前記接続治具の係合位置よりも延出端側に存在する前記湾曲部と、前記係合位置よりも基端側に存在する前記テーパ部と、を有する、
    バスバと電線との接続構造。
    In the connection structure according to claim 1,
    The arm portion
    A tapered portion that extends from the bus bar body in a flat plate shape and gradually increases as the width dimension approaches the base end, and a flat plate shape that extends from the extending end of the tapered portion and the width dimension extends in the extending direction. It is composed of a parallel portion that is constant and a curved portion in which the extending end portion of the parallel portion is curved in the thickness direction of the parallel portion.
    The connecting jig engages with the parallel portion of the arm portion and
    The arm portion
    The contacted portion includes the curved portion existing on the extending end side of the engaging position of the connecting jig and the tapered portion existing on the proximal end side of the engaging position.
    Connection structure between bus bar and electric wire.
  3. 請求項1又は請求項2に記載の接続構造において、
    前記導体芯線は、
    前記バスバに対して超音波接合され、
    前記バスバは、
    前記アーム部の基端近傍における前記アーム部の幅が前記基端に近付くにつれて徐々に大きくなることで、前記アーム部の幅方向側面と前記バスバ本体の側面とがなす角度が、前記アーム部の前記基端近傍における幅が均一である場合の前記角度よりも大きい、ように構成された、
    バスバと電線との接続構造。
    In the connection structure according to claim 1 or 2.
    The conductor core wire is
    Ultrasonically bonded to the bus bar
    The bus bar
    The width of the arm portion in the vicinity of the base end of the arm portion gradually increases as it approaches the base end, so that the angle formed by the widthwise side surface of the arm portion and the side surface of the bus bar main body is the angle of the arm portion. It is configured to be larger than the angle when the width in the vicinity of the base end is uniform.
    Connection structure between bus bar and electric wire.
  4. 複数の単電池で構成された電池集合体に取り付けられる電線配索体と、
    前記電線配索体に設けられたバスバ収容部に収容されて保持されると共に、前記電線配索体に配索される電線の導体芯線が電気的に接続されるバスバと、を備えたバスバモジュールであって、
    前記バスバと前記電線の前記導体芯線とは、
    請求項1〜請求項の何れか一項に記載の接続構造によって接続される、
    バスバモジュール。
    An electric wire wiring body that can be attached to a battery assembly composed of multiple cells,
    A bus bar module including a bus bar that is housed and held in a bus bar accommodating portion provided in the electric wire wiring body, and a bus bar that is electrically connected to a conductor core wire of a wire lined in the wire wiring body. And
    The bus bar and the conductor core wire of the electric wire are
    It is connected by the connection structure according to any one of claims 1 to 3.
    Bus bar module.
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