JP2018125155A

JP2018125155A - Bus bar

Info

Publication number: JP2018125155A
Application number: JP2017016295A
Authority: JP
Inventors: 昭人外山; Akito Toyama; 裕太郎岡▲崎▼; Yutaro Okazaki; 修平江島; Shuhei Ejima
Original assignee: Yazaki Corp
Current assignee: Yazaki Corp
Priority date: 2017-01-31
Filing date: 2017-01-31
Publication date: 2018-08-09

Abstract

PROBLEM TO BE SOLVED: To provide a bus bar capable of suppressing springback of plate portions overlapped with each other while suppressing cost increase.SOLUTION: In a bus bar 11 in which a plate-like main body portion 12 and a wire connecting portion 13 extending from the main body portion are integrally formed in order to electrically connect adjacent electrode terminals of a plurality of unit cells, the main body portion is formed by folding back a plurality of plate portions 31 and 32 partitioned by a folding portion 35 and overlapping the plate portions, and in a long side edge 31a parallel to the folding direction of the plate portion 31 of the lowermost layer, a locking piece 37 extends, the locking piece 37 being folded so as to extend along the outer surface of the uppermost layer plate portion 32 in a state in which the plurality of plate portions are overlapped, and stopping the opening of the plurality of plate portions.SELECTED DRAWING: Figure 2

Description

本発明は、電池集合体の隣り合う単電池を電気的に接続するバスバーに関する。 The present invention relates to a bus bar that electrically connects adjacent cells of a battery assembly.

複数の単電池を備えた電池集合体は、各単電池の隣り合う電極端子間がバスバーによって電気的に接続される。
図９に示すように、バスバーとしては、隣り合う電極端子間に架け渡される板状の本体部５０１と、本体部５０１から延設されて検知電線の端末部に接続される電線接続部５０２とを一体に備え、本体部５０１が、折り返し部５０３により区切られた第１板部５０４および第２板部５０５を折り返し部５０３により１８０度折り返して重ね合わせて二層構造とするものがある（特許文献１参照）。 In a battery assembly including a plurality of unit cells, adjacent electrode terminals of each unit cell are electrically connected by a bus bar.
As shown in FIG. 9, as the bus bar, a plate-like main body portion 501 spanned between adjacent electrode terminals, and an electric wire connection portion 502 extending from the main body portion 501 and connected to the terminal portion of the detection electric wire. And the main body 501 has a two-layer structure in which the first plate portion 504 and the second plate portion 505 separated by the folded portion 503 are folded by 180 degrees by the folded portion 503 and overlapped (patent) Reference 1).

このようなバスバーでは、折り返し部５０３と平行な第１板部５０４の長辺側側縁部５０４ａに延出形成された係止片５０６が第２板部５０５の外面に沿うように屈曲されて第１板部５０４および第２板部５０５の開き止めが行われている。 In such a bus bar, the locking piece 506 extending and formed on the long side edge 504a of the first plate portion 504 parallel to the folded portion 503 is bent along the outer surface of the second plate portion 505. The first plate portion 504 and the second plate portion 505 are prevented from opening.

特開２０１６−９１７７２号公報Japanese Patent Laid-Open No. 2006-91772

ところで、従来の上記バスバーでは、第１板部５０４の長辺側側縁部（折り返し部と平行な側縁部）５０４ａに延出形成された係止片５０６には、折り返し部５０３のスプリングバックによる戻ろうとする力が該係止片５０６の曲げ部を開く方向に作用するので、開き防止の信頼性が低下し易い。 Incidentally, in the conventional bus bar, the locking piece 506 extended and formed on the long side edge (side edge parallel to the folded portion) 504a of the first plate portion 504 has a spring back of the folded portion 503. Since the force to return due to the above acts on the direction in which the bent portion of the locking piece 506 is opened, the reliability of the opening prevention is likely to be lowered.

また、上記バスバーは、第１板部５０４のうち折り返し部５０３を除く側縁部に、第１板部５０４および第２板部５０５が重ね合わされた状態において第２板部５０５の折り返し部５０３を除く側縁部に沿って立ち上がる側縁覆い部５０７を形成するため、加工が複雑でコストアップを招くという問題があった。 Further, the bus bar has the folded portion 503 of the second plate portion 505 in a state where the first plate portion 504 and the second plate portion 505 are overlapped with the side edge portion of the first plate portion 504 excluding the folded portion 503. Since the side edge cover portion 507 that rises along the removed side edge portion is formed, there is a problem that the processing is complicated and the cost is increased.

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、コストアップを極力抑えつつ、互いに重ね合わせられる板部同士の開きを良好に抑制することが可能なバスバーを提供することにある。 This invention is made | formed in view of the situation mentioned above, The objective is providing the bus-bar which can suppress well the opening of the board parts mutually piled up, suppressing a cost increase as much as possible. It is in.

本発明に係る上記目的は、下記（１）〜（３）の構成により達成される。
（１）正極及び負極の電極端子を有する複数の単電池の隣り合う電極端子間を電気的に接続するために、前記隣り合う電極端子間に架け渡される板状の本体部と、前記本体部から延設されて電線の端末部に接続される電線接続部とが一体に形成されたバスバーであって、
前記本体部は、折り返し部に区切られた複数の板部が前記折り返し部により折り返されて重ね合わされることにより構成されており、
最下層の前記板部における折り返し方向と平行な側縁部には、前記複数の板部が重ね合された状態において最上層の前記板部の外面に沿うように折り曲げられて、前記複数の板部を開き止めする係止片が延設されていることを特徴とするバスバー。
（２）前記電線接続部が、最下層の前記板部における前記折り返し部と反対側の側縁部に突設され、
前記係止片が、最下層の前記板部における前記電線接続部が突設された前記側縁部の両側に連続する両側縁部に突設されたことを特徴とする上記（１）に記載のバスバー。
（３）前記電線接続部が、最下層の前記板部における前記折り返し部と反対側の側縁部に突設され、
前記係止片が、前記電線接続部の基部に連続して形成された連結部の両外側縁部に延設され、
前記係止片に対応する最上層の前記板部における側縁部には、折り曲げられた前記係止片が係合可能な内側縁部を有する切欠き凹部が形成されたことを特徴とする上記（１）に記載のバスバー。 The above object of the present invention is achieved by the following configurations (1) to (3).
(1) In order to electrically connect adjacent electrode terminals of a plurality of unit cells having positive and negative electrode terminals, a plate-like main body portion spanned between the adjacent electrode terminals, and the main body portion A bus bar that is integrally formed with a wire connecting portion that extends from and is connected to the terminal portion of the wire,
The main body portion is configured by a plurality of plate portions divided into folded portions being folded and overlapped by the folded portion,
The plurality of plates are folded along the outer surface of the uppermost plate portion in a state in which the plurality of plate portions are superimposed on the side edge portion parallel to the folding direction of the lowermost plate portion. A bus bar in which a locking piece for preventing the opening of the portion is extended.
(2) The electric wire connecting portion protrudes from a side edge portion opposite to the folded portion in the lowermost plate portion.
The said locking piece protruded in the both-sides edge part continued on both sides of the said side edge part in which the said electric wire connection part in the said board part of the lowest layer protruded, The said (1) characterized by the above-mentioned. Bus bar.
(3) The electric wire connecting portion protrudes from a side edge portion on the opposite side to the folded portion in the lowermost plate portion.
The locking piece is extended to both outer edges of the connecting portion formed continuously to the base of the wire connecting portion,
A notch recess having an inner edge portion with which the bent locking piece can be engaged is formed on a side edge portion of the uppermost plate portion corresponding to the locking piece. The bus bar according to (1).

上記（１）の構成のバスバーによれば、最下層の板部における折り返し方向と平行な側縁部に延設された係止片は、折り返し方向と交差する方向に折り曲げられるので、折り返し部と平行な側縁部に延設された従来の係止片よりも複数の板部が開こうとする力に対して開きにくくなる。
即ち、係止片には、折り返し部で開こうとする力が該係止片の曲げ部を開く方向に対して交差する方向に作用するので、複数の板部を開きにくくできる。
また、折り返し方向と交差する方向に折り曲げられた係止片は、単電池の電極端子へのナット締付時等に、重ね合わされた複数の板部が折り返し方向と交差する方向にずれるのを防止できる。つまり、側縁部に側縁覆い部を形成することによるコストアップを招くことなく、板部のずれを防止できる。
上記（２）の構成のバスバーによれば、電線接続部及び係止片が、最下層の板部における側縁部及び両側縁部にそれぞれ突設されることで、これらをプレス加工する際の曲げ方向が同じとなり、加工が容易となる。
上記（３）の構成のバスバーによれば、係止片が板部の両側縁部に突出しないので、バスバーの歩留まりが向上する。 According to the bus bar having the configuration of (1) above, the locking piece extending on the side edge portion parallel to the folding direction in the lowermost plate portion is folded in a direction intersecting with the folding direction. It becomes more difficult to open against the force with which the plurality of plate portions try to open than the conventional locking pieces extending on the parallel side edge portions.
That is, since the force to open at the folding portion acts on the locking piece in a direction intersecting the direction of opening the bent portion of the locking piece, it is difficult to open the plurality of plate portions.
In addition, the locking piece bent in the direction intersecting with the folding direction prevents the plurality of overlapped plate portions from shifting in the direction intersecting with the folding direction when the nut is tightened to the electrode terminal of the unit cell. it can. That is, the shift of the plate portion can be prevented without increasing the cost due to the formation of the side edge covering portion on the side edge portion.
According to the bus bar having the configuration of (2) above, the electric wire connecting portion and the locking piece project from the side edge portion and both side edge portions of the lowermost plate portion, respectively, so that they can be pressed. The bending direction becomes the same, and processing becomes easy.
According to the bus bar having the configuration (3), since the locking pieces do not protrude from both side edges of the plate portion, the yield of the bus bar is improved.

本発明によれば、コストアップを極力抑えつつ、互いに重ね合わせられる板部同士の開きを良好に抑制することが可能なバスバーを提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the bus bar which can suppress the opening of the board parts mutually overlap | superposed favorably can be provided, suppressing cost increase as much as possible.

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 a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

図１は、本発明の一実施形態に係るバスバーの斜視図である。FIG. 1 is a perspective view of a bus bar according to an embodiment of the present invention. 図２は、本実施形態に係るバスバーの加工工程を説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。FIG. 2 is a view for explaining a bus bar processing step according to the present embodiment, and (a) to (c) are perspective views for each bus bar processing step. 図３は、本実施形態に係るバスバーを備えたバスバーモジュールの一部の平面図である。FIG. 3 is a plan view of a part of the bus bar module including the bus bar according to the present embodiment. 図４は、単電池の電極端子に電気的に接続されたバスバーの平面図である。FIG. 4 is a plan view of the bus bar electrically connected to the electrode terminals of the unit cell. 図５は、本実施形態の変形例１に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。FIG. 5 is a diagram for explaining a bus bar according to the first modification of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar. 図６は、本実施形態の変形例２に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。FIG. 6 is a view for explaining a bus bar according to a second modification of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar. 図７は、本実施形態の変形例３に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。FIG. 7 is a view for explaining a bus bar according to Modification 3 of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar. 図８は、本実施形態の変形例４に係るバスバーを説明する図であって、（ａ）〜（ｄ）は、それぞれバスバーの加工工程毎の斜視図である。FIG. 8 is a view for explaining a bus bar according to the fourth modification of the present embodiment, and (a) to (d) are perspective views for each processing step of the bus bar. 図９は、従来のバスバーの斜視図である。FIG. 9 is a perspective view of a conventional bus bar.

以下、本発明に係る実施の形態の例を、図面を参照して説明する。
図１に示すように、本発明の一実施形態に係るバスバー１１は、本体部１２と、電線接続部１３とを有している。バスバー１１は、導電性の金属板にプレス加工が施されるなどして得られる。本体部１２は、電池集合体を構成する単電池の隣り合う電極端子間を電気的に接続するために、隣り合う電極端子間に架け渡される。電線接続部１３は、本体部１２から延設されて電線１５の端末部に接続される。 Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.
As shown in FIG. 1, the bus bar 11 according to one embodiment of the present invention has a main body portion 12 and a wire connecting portion 13. The bus bar 11 is obtained by, for example, pressing a conductive metal plate. The main body 12 is bridged between the adjacent electrode terminals in order to electrically connect the adjacent electrode terminals of the unit cells constituting the battery assembly. The electric wire connection portion 13 extends from the main body portion 12 and is connected to the terminal portion of the electric wire 15.

本体部１２は、略長方形状に形成されており、互いに隣り合う単電池の正極及び負極の電極端子が通される一対の孔２１を有している。これら一対の孔２１は、本体部１２の長手方向に沿って、互いに隣り合う単電池の正極及び負極の電極端子との間隔と同じ間隔をあけて配置されている。 The main body portion 12 is formed in a substantially rectangular shape, and has a pair of holes 21 through which the positive and negative electrode terminals of the unit cells adjacent to each other are passed. The pair of holes 21 are arranged along the longitudinal direction of the main body portion 12 with the same interval as the interval between the positive and negative electrode terminals of the adjacent unit cells.

本体部１２は、ほぼ同一外形の複数の板部３１，３２を有しており、下層（最下層）の板部３１に対して上層（最上層）の板部３２が重ね合わされている。それぞれの板部３１，３２は、その一方の長辺側側縁部３１ａ，３２ａが折り返し部３５によって連結されている。折り返し部３５は、長手方向に間隔をあけて形成されており、板部３１，３２は、折り返し部３５に区切られている。板部３１，３２は、折り返し部３５により折り返されて重ね合わされている。板部３１，３２は、それぞれ孔部３１ｂ，３２ｂを有しており、互いに重ね合わされることで、これらの孔部３１ｂ，３２ｂが連通されて本体部１２の孔２１とされている。 The main body 12 includes a plurality of plate portions 31 and 32 having substantially the same outer shape, and an upper layer (uppermost layer) plate unit 32 is superimposed on a lower layer (lowermost layer) plate unit 31. Each of the plate portions 31 and 32 has one long side side edge portion 31 a and 32 a connected by a folded portion 35. The folded portion 35 is formed with an interval in the longitudinal direction, and the plate portions 31 and 32 are partitioned by the folded portion 35. The plate portions 31 and 32 are folded and overlapped by the folding portion 35. The plate portions 31 and 32 have hole portions 31b and 32b, respectively, and are overlapped with each other so that the hole portions 31b and 32b communicate with each other to form the hole 21 of the main body portion 12.

本体部１２を構成する下層の板部３１には、係止片３７が延設されている。係止片３７は、下層の板部３１における電線接続部１３が突設された長辺側側縁部３１ａの両側に連続する両側縁部である短辺側側縁部３１ｃに突設されている。 A locking piece 37 is extended on the lower plate portion 31 constituting the main body portion 12. The locking piece 37 protrudes from the short side edge 31c, which is a side edge continuous to both sides of the long side edge 31a from which the wire connection portion 13 of the lower plate 31 is protruded. Yes.

これら係止片３７は、複数の板部３１，３２が重ね合わされた状態において、板部３１，３２の折り返し部３５での折り返し方向と直交する方向へ折り曲げられ、上層の板部３２の外面に沿うように折り重ねられている。そして、係止片３７は、上層の板部３２を係止し、重ね合わされた板部３１，３２を開き止めする。 These locking pieces 37 are folded in a direction orthogonal to the folding direction of the folded portions 35 of the plate portions 31 and 32 in a state where the plurality of plate portions 31 and 32 are overlapped, and are formed on the outer surface of the upper plate portion 32. It is folded along. And the latching piece 37 latches the board part 32 of the upper layer, and prevents the laminated board parts 31 and 32 from opening.

また、本体部１２には、折り返し部３５側の長辺側側縁部３１ａ，３２ａと短辺側側縁部３１ｃ，３２ｃとの角部に面取り部３８が形成され、また、短辺側側縁部３１ｃ，３２ｃにおける折り返し部３５と反対寄りには、切欠き部３９が形成されている。下層の板部３１に形成されて折り曲げられた係止片３７は、切欠き部３９に配置されており、これにより本体部１２の短辺側側縁部３１ｃ，３２ｃからの突出が抑えられている。 Further, the main body 12 is formed with chamfered portions 38 at corners of the long side edges 31a and 32a and the short side edges 31c and 32c on the folded portion 35 side, and also on the short side side. A notch 39 is formed on the edge 31c, 32c opposite to the folded portion 35. The locking piece 37 formed and bent on the lower plate portion 31 is disposed in the notch portion 39, thereby suppressing the protrusion from the short side edge portions 31 c and 32 c of the main body portion 12. Yes.

電線接続部１３は、本体部１２における板部３１，３２の連結箇所と反対側に延設されている。この電線接続部１３の端部には、電線１５が電気的に接続される。これにより、バスバー１１は、電線接続部１３に接続された電線１５を介して、図示しないＥＣＵ（Electronic Control Unit）が備える電圧検出回路に接続される。そして、ＥＣＵが、電圧検出回路によって検出された各単電池における一対の電極との電位差（電圧）に基づいて、各単電池の残量や充放電状態等を検出する。 The electric wire connection portion 13 extends on the opposite side of the connection portion of the plate portions 31 and 32 in the main body portion 12. An electric wire 15 is electrically connected to the end of the electric wire connecting portion 13. Thereby, the bus bar 11 is connected to a voltage detection circuit provided in an ECU (Electronic Control Unit) (not shown) via the electric wire 15 connected to the electric wire connecting portion 13. Then, the ECU detects the remaining amount, charge / discharge state, etc. of each unit cell based on the potential difference (voltage) between the pair of electrodes in each unit cell detected by the voltage detection circuit.

電線１５は、導電性の芯線１６と、この芯線１６を被覆した絶縁被覆１７とを有する周知の被覆電線である。電線１５は、その端部において、絶縁被覆１７が皮剥きされて芯線１６が露出している。 The electric wire 15 is a well-known covered electric wire having a conductive core wire 16 and an insulating coating 17 covering the core wire 16. The end portion of the electric wire 15 is stripped of the insulating coating 17 and the core wire 16 is exposed.

電線接続部１３は、下層の板部３１における折り返し部３５と反対側の側縁部に形成されている。電線接続部１３は、板部３１から延びる連結部４０に設けられており、一対の導体圧着片４１と、一対の電線かしめ片４２とを有している。電線１５は、その端部において、絶縁被覆１７の部分が電線かしめ片４２にかしめられて固定され、芯線１６が導体圧着片４１に圧着されている。これにより、電線１５は、電線接続部１３に電気的に接続されている。なお、電線接続部１３は、圧着機による電線１５の圧着に適した所定の厚さに形成されている。 The electric wire connection part 13 is formed in the side edge part on the opposite side to the folding | returning part 35 in the board part 31 of a lower layer. The electric wire connecting portion 13 is provided in the connecting portion 40 extending from the plate portion 31 and has a pair of conductor crimping pieces 41 and a pair of electric wire crimping pieces 42. At the end of the electric wire 15, the portion of the insulation coating 17 is caulked and fixed to the electric wire caulking piece 42, and the core wire 16 is crimped to the conductor crimping piece 41. Thereby, the electric wire 15 is electrically connected to the electric wire connection part 13. In addition, the electric wire connection part 13 is formed in the predetermined | prescribed thickness suitable for the crimping | compression-bonding of the electric wire 15 with a crimping machine.

上述のように、本実施形態に係るバスバー１１は、本体部１２を複数の板部３１，３２を重ね合わせた構造とすることで、電線接続部１３の大型化を抑えつつ本体部１２での電気抵抗を極力小さくすることができる。 As described above, the bus bar 11 according to the present embodiment has a structure in which the main body portion 12 is formed by superimposing the plurality of plate portions 31 and 32, thereby suppressing an increase in the size of the electric wire connection portion 13. The electrical resistance can be minimized.

次に、図２の（ａ）〜（ｃ）に基づいて上記構成のバスバー１１の加工手順について説明する。
図２の（ａ）に示すように、まず、金属板に対してプレス加工を施すことで、曲げ加工前のバスバー１１の展開形状に形成する。このとき、電線接続部１３の形成箇所は、プレスによって所定厚さに形成される。また、導体圧着片４１における芯線１６のかしめの内側となる部分には、セレーション４１ａを加工する。なお、曲げ加工前のバスバー１１は、連鎖状端子材から形成されることが好ましい。 Next, a processing procedure for the bus bar 11 having the above-described configuration will be described with reference to FIGS.
As shown to (a) of FIG. 2, first, it forms in the expansion | deployment shape of the bus-bar 11 before a bending process by giving press processing with respect to a metal plate. At this time, the formation part of the electric wire connection part 13 is formed in predetermined thickness by a press. Further, a serration 41 a is processed in a portion of the conductor crimping piece 41 that is inside the caulking of the core wire 16. In addition, it is preferable that the bus bar 11 before a bending process is formed from a chain-shaped terminal material.

図２の（ｂ）に示すように、曲げ加工を施すことで、折り返し部３５で板部３２を折り返して板部３１に重ね合わせる。このとき、電線接続部１３では、電線１５を圧着する圧着機へセットすることができるように、導体圧着片４１及び電線かしめ片４２が立ち上げられる。 As shown in FIG. 2B, the plate portion 32 is folded by the folded portion 35 and is overlapped with the plate portion 31 by bending. At this time, the conductor crimping piece 41 and the wire crimping piece 42 are raised at the wire connecting portion 13 so as to be set in a crimping machine that crimps the wire 15.

図２の（ｃ）に示すように、曲げ加工を施すことで、下層の板部３１の係止片３７が上層の板部３２の外面に沿うように外側から折り曲げられて、板部３２を係止する。 As shown in FIG. 2C, by bending, the locking piece 37 of the lower plate portion 31 is bent from the outside along the outer surface of the upper plate portion 32, so that the plate portion 32 is Lock.

このようにして、２枚の板部３１，３２が重ね合わされた本体部１２と、電線１５が接続可能な電線接続部１３とを有するバスバー１１が得られる。 In this way, the bus bar 11 having the main body portion 12 in which the two plate portions 31 and 32 are overlaid and the electric wire connecting portion 13 to which the electric wire 15 can be connected is obtained.

次に、上記バスバー１１が装着されるバスバーモジュールについて説明する。
図３は本実施形態に係るバスバーを備えたバスバーモジュールの一部の平面図、図４は単電池の電極端子に電気的に接続されたバスバーの平面図である。
図３に示すバスバーモジュール５１は、電源装置を構成する電池集合体に重ねて取り付けられる。電源装置としては、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、それらの電動モータに動力を供給するものがある。 Next, a bus bar module to which the bus bar 11 is attached will be described.
FIG. 3 is a plan view of a part of the bus bar module including the bus bar according to the present embodiment, and FIG. 4 is a plan view of the bus bar electrically connected to the electrode terminals of the unit cells.
The bus bar module 51 shown in FIG. 3 is attached to the battery assembly that constitutes the power supply device. As a power supply device, there are devices that are used by being 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 these electric motors.

バスバーモジュール５１は、絶縁樹脂製の電線配索体５２を備えている。電線配索体５２は、枠状に形成された複数のバスバー収容部５６を有しており、このバスバー収容部５６にバスバー１１がそれぞれ収容されて保持される。バスバー収容部５６の側壁には、内側へ突出する係止ランス５６ａ，５６ｂが形成されており、バスバー１１は、その本体部１２の長辺側側縁部３１ａ，３２ａが、係止ランス５６ａ，５６ｂによって係止されて保持される。また、電線配索体５２は、電線配索溝部５７と、連結溝部５８とを有している。電線配索溝部５７には、電線１５が収容されており、連結溝部５８には、電線１５が接続されたバスバー１１の電線接続部１３が収容されている。 The bus bar module 51 includes an electric wire wiring body 52 made of insulating resin. The electric cable routing body 52 has a plurality of bus bar accommodating portions 56 formed in a frame shape, and the bus bars 11 are respectively accommodated and held in the bus bar accommodating portions 56. Locking lances 56a and 56b projecting inward are formed on the side wall of the bus bar accommodating portion 56, and the bus bar 11 has long side edge portions 31a and 32a of the main body portion 12 thereof. Locked and held by 56b. In addition, the wire routing body 52 includes a wire routing groove portion 57 and a connecting groove portion 58. The electric wire routing groove portion 57 accommodates the electric wire 15, and the connecting groove portion 58 accommodates the electric wire connection portion 13 of the bus bar 11 to which the electric wire 15 is connected.

図４に示すように、バスバー収容部５６に収容されたバスバー１１には、本体部１２の孔２１に、単電池の電極端子６１が挿通され、この電極端子６１にナット６２が螺合される。そして、このナット６２を締め付けることで、バスバー１１が電極端子６１に締結固定される。ここで、複数の板部３１，３２を開き止めする係止片３７は、平面視において、ナット６２の締結範囲Ａから外れた位置に配置されている。これにより、バスバー１１を電極端子６１に固定する際に、ナット６２が係止片３７に干渉することがない。 As shown in FIG. 4, in the bus bar 11 accommodated in the bus bar accommodating portion 56, the cell terminal electrode terminal 61 is inserted into the hole 21 of the main body portion 12, and the nut 62 is screwed into the electrode terminal 61. . The bus bar 11 is fastened and fixed to the electrode terminal 61 by tightening the nut 62. Here, the locking piece 37 that prevents the plurality of plate portions 31 and 32 from opening is disposed at a position outside the fastening range A of the nut 62 in plan view. Thereby, when the bus bar 11 is fixed to the electrode terminal 61, the nut 62 does not interfere with the locking piece 37.

このように、本実施形態に係るバスバー１１によれば、下層の板部３１における折り返し方向と平行な短辺側側縁部３１ｃに延設された係止片３７は、折り返し方向と交差する方向に折り曲げられるので、図９に示したように、折り返し部５０３と平行な第１板部５０４の長辺側側縁部５０４ａに延設された従来の係止片５０６よりも複数の板部３１,３２が開こうとする力に対して開きにくくなる。 Thus, according to the bus bar 11 according to the present embodiment, the locking piece 37 extending to the short side edge 31c parallel to the folding direction in the lower plate portion 31 is a direction intersecting the folding direction. As shown in FIG. 9, a plurality of plate portions 31 than the conventional locking piece 506 extended to the long side edge portion 504 a of the first plate portion 504 parallel to the folded portion 503, as shown in FIG. 9. , 32 becomes difficult to open against the force to open.

即ち、係止片３７には、折り返し部３５で開こうとする力が係止片３７の曲げ部を開く方向に対して交差する方向に作用するので、複数の板部３１，３２を開きにくくできる。 That is, since the force to open at the folded portion 35 acts on the locking piece 37 in a direction intersecting the direction of opening the bent portion of the locking piece 37, it is difficult to open the plurality of plate portions 31 and 32. it can.

また、折り返し方向と交差する方向に折り曲げられた係止片３７は、単電池の電極端子６１へのナット６２の締付時等に、重ね合わされた複数の板部３１，３２が折り返し方向と交差する方向にずれるのを防止できる。 Further, the locking piece 37 bent in the direction intersecting with the folding direction is such that when the nut 62 is fastened to the electrode terminal 61 of the unit cell, the plurality of overlapped plate portions 31 and 32 intersect with the folding direction. Can be prevented from shifting in the direction of the movement.

例えば、重ね合わされた複数の板部３１，３２が折り返し方向と交差する方向にずれていると、本体部１２の孔２１を構成する各板部３１，３２の孔部３１ｂ，３２ｂがずれてしまう。すると、孔２１に単電池の電極端子６１を挿通させる際に、電極端子６１が板部３２の孔部３２ｂの開口縁部に干渉してしまう。 For example, if the plurality of stacked plate portions 31 and 32 are displaced in a direction crossing the folding direction, the hole portions 31b and 32b of the plate portions 31 and 32 constituting the hole 21 of the main body portion 12 are displaced. . Then, when the electrode terminal 61 of the unit cell is inserted through the hole 21, the electrode terminal 61 interferes with the opening edge portion of the hole portion 32 b of the plate portion 32.

これに対して、本実施形態に係るバスバー１１では、重ね合わされた複数の板部３１，３２同士が折り返し方向と交差する方向にずれるのが防止されるので、孔２１に単電池の電極端子６１を挿通させる際に、電極端子６１が板部３２の孔部３２ｂに干渉するのを抑制できる。このように、本実施形態に係るバスバー１１によれば、図９に示した従来のバスバーのように、第１板部５０４の側縁部に側縁覆い部５０７を形成することによるコストアップを招くことなく、板部３１，３２のずれを防止して電極端子６１との干渉を抑制できる。 On the other hand, in the bus bar 11 according to the present embodiment, the plurality of stacked plate portions 31 and 32 are prevented from shifting in the direction intersecting with the folding direction, so that the electrode terminal 61 of the unit cell is formed in the hole 21. It is possible to suppress the electrode terminal 61 from interfering with the hole portion 32b of the plate portion 32 when the wire is inserted. Thus, according to the bus bar 11 according to the present embodiment, as in the conventional bus bar shown in FIG. 9, the cost is increased by forming the side edge cover portion 507 on the side edge portion of the first plate portion 504. Without incurring, the plate portions 31 and 32 can be prevented from being displaced and interference with the electrode terminal 61 can be suppressed.

また、上記実施形態に係るバスバー１１によれば、電線接続部１３及び係止片３７が、下層の板部３１の長辺側側縁部３１ａ及び両短辺側側縁部３１ｃにそれぞれ突設されることで、これらをプレス加工する際の曲げ方向が同じとなり、加工が容易となる。 Moreover, according to the bus bar 11 according to the above-described embodiment, the wire connecting portion 13 and the locking piece 37 project from the long side edge 31a and the short side edge 31c of the lower plate portion 31, respectively. By doing so, the bending direction when these are pressed becomes the same, and the processing becomes easy.

なお、係止片３７は、ナット６２の締結範囲Ａから外れた位置で上層の板部３２を係止可能であれば、その形状及び大きさは限定されることはなく、締結範囲Ａを外れた位置で係止片３７を極力大きくすることで大きな係止力を得ることができる。 The shape and size of the locking piece 37 are not limited as long as the locking plate 37 can lock the upper plate portion 32 at a position outside the fastening range A of the nut 62. A large locking force can be obtained by enlarging the locking piece 37 as much as possible.

また、上記実施形態では、ナット６２によって単電池の電極端子６１へバスバー１１の本体部１２を固定したが、バスバー１１の本体部１２を電極端子６１へ溶接して固定してもよい。 Moreover, in the said embodiment, although the main-body part 12 of the bus bar 11 was fixed to the electrode terminal 61 of the cell by the nut 62, you may weld and fix the main-body part 12 of the bus bar 11 to the electrode terminal 61.

また、バスバー１１の電線接続部１３への電線１５の接続構造としては、圧着接続によるものに限らず、例えば、電線１５を圧接刃に食い込ませて接続する圧接接続や電線１５の芯線１６を溶接して接続する溶接接続でもよい。 In addition, the connection structure of the electric wire 15 to the electric wire connection portion 13 of the bus bar 11 is not limited to that by crimping connection. For example, the press connection or the core wire 16 of the electric wire 15 is welded with the electric wire 15 biting into the press contact blade. It is also possible to use a welding connection.

上述したように、本実施形態に係るバスバー１１によれば、コストアップを極力抑えつつ、互いに重ね合わせられる板部３１，３２同士の開きを良好に抑制することができる。 As described above, according to the bus bar 11 according to the present embodiment, it is possible to satisfactorily suppress the opening between the plate portions 31 and 32 that are overlapped with each other while suppressing an increase in cost as much as possible.

次に、本実施形態の各種の変形例に係るバスバーについて説明する。
なお、上記実施形態のバスバー１１と同一構成部分は、同一符号を付して説明を省略する。 Next, bus bars according to various modifications of the present embodiment will be described.
Note that the same components as those of the bus bar 11 of the above embodiment are denoted by the same reference numerals and description thereof is omitted.

（変形例１）
図５は、本実施形態の変形例１に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。
図５の（ａ）に示すように、変形例１に係るバスバー１１Ａでは、係止片３７Ａが、下層の板部３１の電線接続部１３の基部に連続して形成された連結部４０に設けられている。この係止片３７Ａは、連結部４０の両外側縁部に延設されている。また、このバスバー１１Ａでは、係止片３７Ａに対応する上層の板部３２における長辺側側縁部３２ａに切欠き凹部７１が形成されている。 (Modification 1)
FIG. 5 is a view for explaining a bus bar according to the first modification of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar.
As shown in FIG. 5A, in the bus bar 11 A according to the modified example 1, the locking piece 37 A is provided in the connecting portion 40 formed continuously from the base portion of the wire connecting portion 13 of the lower plate portion 31. It has been. The locking pieces 37 A are extended at both outer edges of the connecting portion 40. Further, in this bus bar 11A, a notch recess 71 is formed in the long side edge portion 32a of the upper plate portion 32 corresponding to the locking piece 37A.

この変形例１の場合も、金属板に対してプレス加工を施すことで、曲げ加工前のバスバー１１Ａを作製する。
次に、図５の（ｂ）に示すように、曲げ加工を施すことで、係止片３７Ａを立ち上げ、さらに、折り返し部３５で板部３２を折り返して板部３１に重ね合わせる。このようにすると、立ち上げられた各係止片３７Ａは、板部３２の切欠き凹部７１内に配置される。また、電線接続部１３の導体圧着片４１及び電線かしめ片４２も立ち上げられる。 Also in the case of this modification 1, the bus bar 11A before a bending process is produced by pressing a metal plate.
Next, as shown in FIG. 5B, the locking piece 37 A is raised by bending, and the plate portion 32 is folded back by the folding portion 35 and overlapped with the plate portion 31. In this way, each of the raised locking pieces 37 A is disposed in the notch recess 71 of the plate portion 32. Moreover, the conductor crimping piece 41 and the electric wire crimping piece 42 of the electric wire connection part 13 are also started up.

その後、図５の（ｃ）に示すように、曲げ加工を施すことで、下層の板部３１の係止片３７Ａが上層の板部３２の外面に沿うように切欠き凹部７１の内側から外側へ折り曲げられて、切欠き凹部７１の内側縁部に係合される。 Thereafter, as shown in FIG. 5 (c), by bending, the engaging piece 37A of the lower plate portion 31 extends from the inner side of the notch recess 71 so as to be along the outer surface of the upper plate portion 32. And is engaged with the inner edge of the notch recess 71.

このようにして、２枚の板部３１，３２が重ね合わされた本体部１２と、電線１５が接続可能な電線接続部１３とを有するバスバー１１Ａが得られる。
このように、変形例１に係るバスバー１１Ａによれば、係止片３７Ａが板部３１の両短辺側側縁部３１ｃに突出しないので、歩留まりが向上する。 In this way, the bus bar 11 A having the main body portion 12 in which the two plate portions 31 and 32 are overlapped and the electric wire connecting portion 13 to which the electric wire 15 can be connected is obtained.
As described above, according to the bus bar 11A according to the modified example 1, since the locking pieces 37A do not protrude from both the short side edges 31c of the plate portion 31, the yield is improved.

（変形例２）
図６は、本実施形態の変形例２に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。
図６の（ａ）に示すように、変形例２に係るバスバー１１Ｂでは、係止片３７Ｂが、下層の板部３１の各短辺側側縁部３１ｃから斜めに突設されている。係止片３７Ｂは、折り返し部３５から離れる方向へ傾斜して突設されている。 (Modification 2)
FIG. 6 is a view for explaining a bus bar according to a second modification of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar.
As shown to (a) of FIG. 6, in the bus-bar 11B which concerns on the modification 2, the locking piece 37B protrudes diagonally from each short side edge part 31c of the board part 31 of a lower layer. The locking piece 37 B is provided so as to be inclined in a direction away from the folded portion 35.

この変形例２の場合も、金属板に対してプレス加工を施すことで、曲げ加工前のバスバー１１Ｂを作製する。
次に、図６の（ｂ）に示すように、曲げ加工を施すことで、折り返し部３５で板部３２を折り返して板部３１に重ね合わせる。また、電線接続部１３の導体圧着片４１及び電線かしめ片４２が立ち上げられる。 Also in the case of this modification 2, the bus bar 11B before a bending process is produced by pressing a metal plate.
Next, as shown in FIG. 6B, the plate portion 32 is folded by the folded portion 35 and is overlapped with the plate portion 31 by performing a bending process. Moreover, the conductor crimping piece 41 and the electric wire crimping piece 42 of the electric wire connection part 13 are started up.

その後、図６の（ｃ）に示すように、曲げ加工を施すことで、下層の板部３１の係止片３７Ｂが上層の板部３２の外面に沿うように外側から内側へ折り曲げられる。
このようにして、２枚の板部３１，３２が重ね合わされた本体部１２と、電線１５が接続可能な電線接続部１３とを有するバスバー１１Ｂが得られる。 After that, as shown in FIG. 6C, by bending, the locking piece 37 B of the lower plate portion 31 is bent from the outside to the inside so as to follow the outer surface of the upper plate portion 32.
In this way, the bus bar 11B having the main body portion 12 in which the two plate portions 31 and 32 are overlaid and the electric wire connecting portion 13 to which the electric wire 15 can be connected is obtained.

この変形例２に係るバスバー１１Ｂの係止片３７Ｂのように、本発明に係る係止片は板部３２の折り返し方向と９０度交差する方向に折り曲げられるものに限らず、板部３２の折り返し方向に傾くように傾斜して折り曲げられてもよい。この場合も、係止片３７Ｂには、折り返し部３５で開こうとする力が係止片３７Ｂの曲げ部を開く方向に対して交差する方向に作用するので、複数の板部３１，３２を開きにくくできる。 Like the latching piece 37B of the bus bar 11B according to the second modification, the latching piece according to the present invention is not limited to bend in the direction intersecting with the folding direction of the plate part 32 by 90 degrees, but the folding of the plate part 32 is also possible. It may be bent so as to be inclined in the direction. Also in this case, since the force to open at the folded portion 35 acts on the locking piece 37B in a direction intersecting with the direction of opening the bent portion of the locking piece 37B, the plurality of plate portions 31 and 32 are attached to the locking piece 37B. It can be difficult to open.

（変形例３）
図７は、本実施形態の変形例３に係るバスバーを説明する図であって、（ａ）〜（ｃ）は、それぞれバスバーの加工工程毎の斜視図である。
図７の（ａ）に示すように、変形例３に係るバスバー１１Ｃでは、それぞれの板部３１，３２は、その一方の短辺側側縁部３１ｃ，３２ｃにおいて折り返し部３５によって連結されている。そして、板部３１，３２は、折り返し部３５により折り返されて重ね合わされる。 (Modification 3)
FIG. 7 is a view for explaining a bus bar according to Modification 3 of the present embodiment, and (a) to (c) are perspective views for each processing step of the bus bar.
As shown to (a) of FIG. 7, in the bus-bar 11C which concerns on the modification 3, each board part 31 and 32 is connected by the folding | returning part 35 in the one short side edge part 31c, 32c. . The plate portions 31 and 32 are folded back and overlapped by the folding portion 35.

また、このバスバー１１Ｃでは、下層の板部３１における他方の短辺側側縁部３１ｃの両側に係止片３７Ｃが突設されている。 Further, in this bus bar 11C, locking pieces 37C are projected from both sides of the other short side edge 31c of the lower plate portion 31.

この変形例３の場合も、金属板に対してプレス加工を施すことで、曲げ加工前のバスバー１１Ｃを作製する。
次に、図７の（ｂ）に示すように、曲げ加工を施すことで、折り返し部３５で板部３２を折り返して板部３１に重ね合わせる。また、電線接続部１３の導体圧着片４１及び電線かしめ片４２が立ち上げられる。 Also in the case of this modification 3, the bus bar 11C before a bending process is produced by pressing a metal plate.
Next, as shown in FIG. 7B, by bending, the plate portion 32 is folded by the folded portion 35 and overlapped with the plate portion 31. Moreover, the conductor crimping piece 41 and the electric wire crimping piece 42 of the electric wire connection part 13 are started up.

その後、図７の（ｃ）に示すように、曲げ加工を施すことで、下層の板部３１の係止片３７Ｃが上層の板部３２の外面に沿うように外側から内側へ折り曲げられる。
このようにして、２枚の板部３１，３２が重ね合わされた本体部１２と、電線１５が接続可能な電線接続部１３とを有するバスバー１１Ｃが得られる。 Thereafter, as shown in FIG. 7C, the engaging piece 37 C of the lower plate portion 31 is bent from the outside to the inside so as to be along the outer surface of the upper plate portion 32 by bending.
In this way, the bus bar 11C having the main body portion 12 in which the two plate portions 31 and 32 are overlaid and the electric wire connecting portion 13 to which the electric wire 15 can be connected is obtained.

この変形例３に係るバスバー１１Ｃのように、板部３１，３２は、一方の短辺側側縁部３１ｃ，３２ｃで連結されて折り返し部３５によって折り返される構造であってもよい。この場合も、反対側の短辺側側縁部３１ｃの係止片３７Ｃによって複数の板部３１，３２を開きにくくできる。 As in the bus bar 11C according to the third modification, the plate portions 31 and 32 may be connected to each other at the short side edge portions 31c and 32c and folded back by the folding portion 35. Also in this case, it is possible to make it difficult to open the plurality of plate portions 31 and 32 by the locking piece 37C of the opposite short side edge 31c.

（変形例４）
図８は、本実施形態の変形例４に係るバスバーを説明する図であって、（ａ）〜（ｄ）は、それぞれバスバーの加工工程毎の斜視図である。
図８の（ａ）に示すように、変形例４に係るバスバー１１Ｄは、本体部１２Ｄが中間層の板部３３を備えており、板部３１が最下層、板部３２が最上層とされる。この板部３３は、長辺側側縁部３３ａ及び短辺側側縁部３３ｃを有して板部３２とほぼ同じ略長方形状に形成されており、最上層の板部３２における最下層の板部３１と反対側に連結されている。板部３２，３３は、その長辺側側縁部３２ａ，３３ａが折り返し部３５Ｄによって連結されている。折り返し部３５Ｄは、長手方向に間隔をあけて形成されており、板部３２，３３は、折り返し部３５Ｄにより折り返されて重ね合わされる。また、中間層の板部３３にも、本体部１２Ｄの孔２１を構成する孔部３３ｂが形成されている。 (Modification 4)
FIG. 8 is a view for explaining a bus bar according to the fourth modification of the present embodiment, and (a) to (d) are perspective views for each processing step of the bus bar.
As shown in FIG. 8A, the bus bar 11D according to the modified example 4 includes a main body portion 12D having an intermediate layer plate portion 33, the plate portion 31 being the lowermost layer, and the plate portion 32 being the uppermost layer. The The plate portion 33 has a long side edge portion 33a and a short side edge portion 33c and is formed in substantially the same rectangular shape as the plate portion 32. It is connected to the side opposite to the plate part 31. The plate portions 32 and 33 have long side edge portions 32a and 33a connected by a folded portion 35D. The folded portion 35D is formed with an interval in the longitudinal direction, and the plate portions 32 and 33 are folded and overlapped by the folded portion 35D. Further, a hole 33b constituting the hole 21 of the main body 12D is also formed in the intermediate layer plate 33.

この変形例４の場合も、金属板に対してプレス加工を施すことで、曲げ加工前のバスバー１１Ｄを作製する。
次に、図８の（ｂ）に示すように、曲げ加工を施すことで、折り返し部３５Ｄで板部３３を折り返して板部３２に重ね合わせる。 Also in the case of this modification 4, the bus bar 11D before a bending process is produced by pressing a metal plate.
Next, as shown in FIG. 8B, by bending, the plate portion 33 is folded by the folded portion 35D and overlapped on the plate portion 32.

さらに、図８の（ｃ）に示すように、曲げ加工を施すことで、重ね合わせた板部３２，３３を折り返し部３５で折り返して板部３１に重ね合わせる。また、電線接続部１３の導体圧着片４１及び電線かしめ片４２が立ち上げられる。 Further, as shown in FIG. 8C, by bending, the overlapped plate portions 32 and 33 are folded back by the folding portion 35 and overlapped on the plate portion 31. Moreover, the conductor crimping piece 41 and the electric wire crimping piece 42 of the electric wire connection part 13 are started up.

その後、図８の（ｄ）に示すように、曲げ加工を施すことで、最下層の板部３１の係止片３７Ｄが最上層の板部３２の外面に沿うように外側から内側へ折り曲げられる。
このようにして、３枚の板部３１，３２，３３が重ね合わされた本体部１２Ｄと、電線１５が接続可能な電線接続部１３とを有するバスバー１１Ｄが得られる。 After that, as shown in FIG. 8D, the locking piece 37 D of the lowermost plate portion 31 is bent from the outer side to the inner side along the outer surface of the uppermost plate portion 32 by performing bending. .
In this way, the bus bar 11D having the main body portion 12D in which the three plate portions 31, 32, and 33 are overlapped and the electric wire connection portion 13 to which the electric wire 15 can be connected is obtained.

この変形例４に係るバスバー１１Ｄのように、本体部１２Ｄは、板部３１，３２，３３が重ね合わされた３層であってもよい。この場合も、係止片３７Ｄによって複数の板部３１，３２，３３を開きにくくできる。なお、本体部１２Ｄは、中間層の板部を複数備えた４層以上であってもよい。 Like the bus bar 11D according to the fourth modification, the main body 12D may have three layers in which the plate parts 31, 32, and 33 are overlapped. Also in this case, it is possible to make it difficult to open the plurality of plate portions 31, 32, 33 by the locking piece 37D. The main body 12D may have four or more layers including a plurality of intermediate layer plates.

尚、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。 In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

ここで、上述した本発明に係るバスバーの実施形態の特徴をそれぞれ以下［１］〜［３］に簡潔に纏めて列記する。
［１］正極及び負極の電極端子（６１）を有する複数の単電池の隣り合う電極端子（６１）間を電気的に接続するために、前記隣り合う電極端子（６１）間に架け渡される板状の本体部（１２，１２Ｄ）と、前記本体部（１２，１２Ｄ）から延設されて電線の端末部に接続される電線接続部（１３）とが一体に形成されたバスバー（１１，１１Ａ〜１１Ｄ）であって、
前記本体部（１２，１２Ｄ）は、折り返し部（３５，３５Ｄ）に区切られた複数の板部（３１，３２，３３）が前記折り返し部（３５，３５Ｄ）により折り返されて重ね合わされることにより構成されており、
最下層の前記板部（３１）における折り返し方向と平行な側縁部（長辺側側縁部３１ａ、短辺側側縁部３１ｃ）には、前記複数の板部（３１，３２，３３）が重ね合された状態において最上層の前記板部（３２，３３）の外面に沿うように折り曲げられて、前記複数の板部（３１，３２，３３）を開き止めする係止片（３７，３７Ａ〜３７Ｄ）が延設されていることを特徴とするバスバー（１１，１１Ａ〜１１Ｄ）。
［２］前記電線接続部（１３）が、最下層の前記板部（３１）における前記折り返し部（３５）と反対側の側縁部（長辺側側縁部３１ａ）に突設され、
前記係止片（３７，３７Ｂ，３７Ｄ）が、最下層の前記板部（３１）における前記電線接続部（１３）が突設された前記側縁部（長辺側側縁部３１ａ）の両側に連続する両側縁部（短辺側側縁部３１ｃ）に突設されたことを特徴とする上記［１］に記載のバスバー（１１，１１Ｂ，１１Ｄ）。
［３］前記電線接続部（１３）が、最下層の前記板部（３１）における前記折り返し部（３５）と反対側の側縁部（長辺側側縁部３１ａ）に突設され、
前記係止片（３７Ａ）が、前記電線接続部（１３）の基部に連続して形成された連結部（４０）の両外側縁部に延設され、
前記係止片（３７Ａ）に対応する最上層の前記板部（３２）における側縁部（長辺側側縁部３２ａ）には、折り曲げられた前記係止片（３７Ａ）が係合可能な内側縁部を有する切欠き凹部（７１）が形成されたことを特徴とする上記［１］に記載のバスバー（１１Ａ）。 Here, the features of the above-described embodiments of the bus bar according to the present invention are briefly summarized and listed in the following [1] to [3], respectively.
[1] A plate spanned between adjacent electrode terminals (61) in order to electrically connect adjacent electrode terminals (61) of a plurality of unit cells having positive and negative electrode terminals (61). Bus bar (11, 11A) integrally formed with a main body (12, 12D) having a shape and an electric wire connecting portion (13) extending from the main body (12, 12D) and connected to the terminal of the electric wire ~ 11D),
The main body portion (12, 12D) is formed by a plurality of plate portions (31, 32, 33) divided into folded portions (35, 35D) being folded by the folded portions (35, 35D) and being overlapped. Configured,
A plurality of plate portions (31, 32, 33) are provided on side edge portions (long side edge portion 31a, short side edge portion 31c) parallel to the folding direction of the lowermost plate portion (31). Are folded along the outer surface of the uppermost plate portion (32, 33) in the overlapped state, and the locking pieces (37, 37) that prevent the plurality of plate portions (31, 32, 33) from opening. 37A-37D) are extended, and the bus bar (11,11A-11D) characterized by the above-mentioned.
[2] The electric wire connecting portion (13) is protruded from the side edge (long side edge 31a) opposite to the folded portion (35) in the lowermost plate (31).
The locking pieces (37, 37B, 37D) are arranged on both sides of the side edge portion (long side edge portion 31a) on which the wire connecting portion (13) protrudes from the lowermost plate portion (31). The bus bar (11, 11B, 11D) according to the above [1], wherein the bus bar (11, 11B, 11D) is provided so as to protrude from both side edges (short side edge 31c).
[3] The electric wire connecting portion (13) is protruded from the side edge (long side edge 31a) opposite to the folded portion (35) in the lowermost plate (31).
The locking piece (37A) is extended to both outer edges of the connecting portion (40) formed continuously to the base of the wire connecting portion (13),
The bent locking piece (37A) can be engaged with a side edge (long side edge 32a) of the uppermost plate portion (32) corresponding to the locking piece (37A). The bus bar (11A) according to the above [1], wherein a notch recess (71) having an inner edge is formed.

１１：バスバー
１２：本体部
１３：電線接続部
１５：電線
３１，３２：板部
３１ａ：長辺側側縁部（側縁部）
３１ｃ：短辺側側縁部（側縁部）
３５：折り返し部
３７：係止片
６１：電極端子 11: Bus bar 12: Main body part 13: Electric wire connection part 15: Electric wire 31, 32: Plate part 31a: Long side edge (side edge)
31c: Short side edge (side edge)
35: Folded portion 37: Locking piece 61: Electrode terminal

Claims

In order to electrically connect adjacent electrode terminals of a plurality of unit cells having positive and negative electrode terminals, a plate-like main body portion spanned between the adjacent electrode terminals, and extending from the main body portion The bus bar is integrally formed with the wire connection portion connected to the terminal portion of the wire,
The main body portion is configured by a plurality of plate portions divided into folded portions being folded and overlapped by the folded portion,
The plurality of plates are folded along the outer surface of the uppermost plate portion in a state in which the plurality of plate portions are superimposed on the side edge portion parallel to the folding direction of the lowermost plate portion. A bus bar in which a locking piece for preventing the opening of the portion is extended.

The wire connecting portion is provided on the side edge of the lowermost plate portion opposite to the folded portion;
The said locking piece protruded by the both-sides edge part which followed the both sides of the said side edge part by which the said electric wire connection part in the said board part of the lowest layer was protrudingly provided. Bus bar.

The wire connecting portion is provided on the side edge of the lowermost plate portion opposite to the folded portion;
The locking piece is extended to both outer edges of the connecting portion formed continuously to the base of the wire connecting portion,
A notch recess having an inner edge portion with which the bent locking piece can be engaged is formed in a side edge portion of the plate portion of the uppermost layer corresponding to the locking piece. Item 1. A bus bar according to item 1.