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WO2017138318A1 - Bus bar and method for producing bus bar - Google Patents

Bus bar and method for producing bus bar Download PDF

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Publication number
WO2017138318A1
WO2017138318A1 PCT/JP2017/001653 JP2017001653W WO2017138318A1 WO 2017138318 A1 WO2017138318 A1 WO 2017138318A1 JP 2017001653 W JP2017001653 W JP 2017001653W WO 2017138318 A1 WO2017138318 A1 WO 2017138318A1
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WO
WIPO (PCT)
Prior art keywords
bus bar
conductive path
electrode terminals
path
flat plate
Prior art date
Application number
PCT/JP2017/001653
Other languages
French (fr)
Japanese (ja)
Inventor
治 中山
直樹 福島
克司 宮崎
成志 木村
Original Assignee
株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Application filed by 株式会社オートネットワーク技術研究所, 住友電装株式会社, 住友電気工業株式会社 filed Critical 株式会社オートネットワーク技術研究所
Publication of WO2017138318A1 publication Critical patent/WO2017138318A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—Mountings
    • H01G2/04—Mountings specially adapted for mounting on a chassis
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • a plurality of power storage elements are connected in series or in parallel by connecting adjacent electrode terminals of a plurality of power storage elements having positive and negative electrode terminals with a bus bar.
  • a plurality of bus bars are embedded in a battery connection plate mounted on a battery assembly composed of a plurality of square batteries, and each bus bar is screwed and fixed to an electrode with a bolt or the like.
  • the adjacent electrodes of the square battery are connected by a bus bar.
  • the cross-sectional area of the shape of the bus bar is constant, the surface area of the bus bar increases if the plate thickness is reduced and the dimension in the width direction, which is the direction orthogonal to the connection direction between the electrodes, is increased. It is preferable from the viewpoint of heat dissipation.
  • the dimension of the bus bar in the width direction is increased, there is a problem that a space for arranging the bus bar is increased, which is contrary to a request for downsizing a member such as a power storage module to which the bus bar is mounted.
  • the technology described in the present specification has been completed based on the above circumstances, and provides a bus bar capable of suppressing an increase in size even when the plate thickness is reduced. With the goal.
  • the bus bar described in the present specification is a bus bar having a constant thickness dimension that is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path, and has a flat plate surface. And a bent portion extending in a direction along the path of the conductive path in a shape bent with respect to the plate surface of the flat plate section in a direction intersecting with the path of the conductive path.
  • the bus bar manufacturing method described in this specification is a method for manufacturing a bus bar having a certain thickness dimension that is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path.
  • a bent portion extending in a direction along the path of the conductive path in a shape bent with respect to the plate surface in a direction intersecting the path of the conductive path with respect to a flat metal plate material having a flat plate surface Form.
  • the curved surface of the bending portion in the direction intersecting the path of the conductive path can increase the surface area of the bus bar while suppressing an increase in the dimension in the width direction with respect to the path direction of the conductive path.
  • the “constant thickness dimension” includes a configuration in which the thickness dimension slightly changes. For example, the deviation of the thickness dimension between the bent portion and the flat plate portion that occurs when a bent portion is formed by bending a metal plate material of a constant thickness with a die of a press machine is included in the range of the constant thickness dimension. Can be.
  • the bent portion is bent into a waveform composed of a peak portion and a valley portion. In this way, the surface area of the bus bar can be increased.
  • the flat plate portion includes a pair of connection portions connected to the pair of electrode terminals, and a connection portion that connects the pair of connection portions so that the conductive path bypasses in a direction connecting the pair of connection portions. And the bent portion is formed in the connecting portion. If it does in this way, the surface area of a bus-bar can be increased according to the length which a conductive path detours by a connection part.
  • the top view which shows the electrical storage module of Embodiment 1 Top view showing the bus bar Right side view showing the busbar The top view which shows the electrical storage module of Embodiment 2. Top view showing the bus bar Right side view showing the busbar The top view which shows the bus-bar of other embodiment The top view which shows the bus-bar of other embodiment
  • the bus bar 20 of this embodiment is attached to the power storage module 10.
  • the power storage module 10 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is used as a power source for driving the vehicle.
  • the X direction is the front
  • the Y direction is the left
  • the Z direction is the upper.
  • the power storage module 10 includes a plurality (two in the present embodiment) of power storage elements 11 arranged on the left and right, and a bus bar 20 attached to the plurality of power storage elements 11.
  • Each power storage element 11 includes a box-shaped main body 12 in which a power storage element (not shown) is accommodated in a flat rectangular parallelepiped case, and bolt-shaped electrode terminals 13A that protrude vertically from the upper surface of the main body 12.
  • 13B illustrated as positive electrode 13A and negative electrode 13B.
  • the electrode terminals 13 ⁇ / b> A and 13 ⁇ / b> B have a flat rectangular base portion on which the plate surface of the bus bar 20 is placed.
  • the electrode terminals 13A and 13B may be fastened with bolts, for example, as nuts.
  • the polarity (positive / negative) direction of the plurality of power storage elements 11 is arranged so that the power storage elements 11 adjacent to each other are opposite to each other, and thereby the electrode terminals 13A and 13B having different polarities are adjacent to each other.
  • the front electrode terminals 13A and 13B located at the end of the series connection are connected to an external device such as an inverter via an electric wire (not shown).
  • the bus bar 20 is made of a metal plate material having a certain thickness such as copper, copper alloy, aluminum, aluminum alloy, stainless steel (SUS), etc., and has a substantially U-shaped conductive path as shown in FIGS.
  • the pair of connection portions 22 connected to the pair of electrode terminals 13A and 13B and the pair of connection portions 22 (and the pair of electrode terminals 13A and 13B) are linearly connected to the direction (left and right direction).
  • the connecting portion 25 is connected so as to bypass the conductive path.
  • a circular through hole 23 through which the bolt-shaped electrode terminals 13A and 13B can be inserted is formed through the connecting portion 22.
  • the electrode terminals 13A and 13B and the connecting portion 22 are connected by passing the electrode terminals 13A and 13 through the through hole 23 and fastening them with nuts.
  • the above-described bus bar 20 has a flat plate surface, and is formed in the flat plate portion 21 including the entire connection portion 22 and a part of the connection portion 25, and the connection portion 25, and the path of the conductive path (the connection portion 25). And a bent portion 26 having a shape bent with respect to the surface of the flat plate portion 21 in a direction (front-rear direction; an example of “a direction intersecting the path of the conductive path”) orthogonal to the path extending in the left-right direction in FIG.
  • the bent portion 26 extends in the left-right direction (the direction along the path of the conductive path) over the entire length of the connecting portion 25 in the left-right direction, on one side of the peak portion 27A protruding upward and on both sides of the peak portion 27A. It has a plurality of valleys 27B recessed downward, and the peaks 27A and valleys 27B are alternately connected to form a waveform.
  • the manufacturing method of the bus bar 20 can be manufactured by placing a metal plate material on a die of a press machine and punching and bending the metal plate material with a die.
  • the bus bar 20 is a bus bar 20 of a certain thickness dimension that is connected to the electrode terminals 13A and 13B of the plurality of power storage elements 11 having the positive and negative electrode terminals 13A and 13B to form a conductive path, and is a flat plate surface And a bent portion 26 that extends in the left-right direction (direction along the path of the conductive path) in a shape bent with respect to the plate surface of the flat plate section 21 in the front-rear direction (direction intersecting the path of the conductive path). And comprising.
  • the surface area of the bus bar 20 can be increased while suppressing an increase in the dimension in the width direction (front-rear direction) with respect to the path direction of the conductive path.
  • the “constant thickness dimension” includes a configuration in which the thickness dimension slightly changes.
  • the bending part 26 is made into the shape bent in the waveform which consists of the peak part 27A and the trough part 27B.
  • the surface area of the bus bar 20 can be increased as compared with the configuration in which the bent portion is formed only from one of the peak portion 27A and the valley portion 27B.
  • the flat plate portion 21 includes a pair of connection portions 22 connected to the pair of electrode terminals 13A and 13B, and the conductive path bypasses the direction in which the through holes 23 of the pair of connection portions 22 are connected by a short path.
  • the connecting portion 25 is connected to a pair of connecting portions 22, and a bent portion 26 is formed in the connecting portion 25.
  • the surface area of the bus bar 20 can be increased according to the length of the conductive path detoured by the connecting portion 25.
  • Embodiment 2 will be described with reference to FIGS. 4 to 6.
  • FIG. The power storage module 30 of the second embodiment uses a bus bar 31 that constitutes a crank-shaped conductive path.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • the direction of the adjacent power storage elements 11 in the power storage module 30 is the same as that of the first embodiment, and the adjacent electrode terminals 13A and 13A (13B and 13B) are the same. It is polar.
  • the bus bar 31 includes a flat plate portion 37 having a flat plate surface and a bent portion 26.
  • the bus bar 31 has a pair of connection portions 32 connected to the pair of electrode terminals 13A and 13B and a pair of connection portions so that the conductive path bypasses the direction connecting the pair of connection portions 32 (an oblique direction). It has the connection part 35 which connects the part 32 in a crank shape.
  • the connecting portion 35 is formed with a bent portion 26 extending in the left-right direction (the direction along the direction in which the connecting portion is connected).
  • the connecting portion 32 is formed in the flat plate portion 37, and a circular through hole 33 through which the bolt-shaped electrode terminals 13A and 13B can be inserted is formed.
  • the bending portion 26 expands and contracts in the direction of assembly tolerance (front-rear direction) according to the assembly accuracy error (front-rear direction error) between the adjacent power storage elements 11 to absorb the error. Therefore, it is possible to suppress a problem in assembling the bus bar 31 to the electrode terminals 13A and 13B due to an error in assembling accuracy between the adjacent power storage elements 11.
  • the technology described in the present specification is not limited to the embodiments described with reference to the above description and drawings.
  • the following embodiments are also included in the technology described in this specification.
  • the shape of the bending part 26 is not restricted to the shape of the said embodiment.
  • the trough part 27B may be one.
  • the bending part may have only one of the peak part 27A and the trough part 27B.
  • the bus bars 20 and 31 are bolted to the electrode terminals 13A and 13B.
  • the present invention is not limited to this.
  • the bus bars 40 and 50 may be connected to the electrode terminals 13A and 13B by laser welding.
  • the through-hole 23 of the bus bar 20 of the first embodiment is eliminated as in the bus bar 40 of FIG. 7, and the connection portion 42 is formed by laser welding, or the bus bar 31 of the second embodiment is passed through like the bus bar 50 of FIG. It is good also as the connection part 22 which loses the hole 33 and is laser-welded.
  • the plate thickness is thinner as compared with the configuration in which the bus bars 20 and 31 are bolted to the electrode terminals 13A and 13B because the weldability is improved.
  • connection means such as ultrasonic welding and resistance welding.
  • the bus bars 20, 31, 40, and 50 connecting the electrode terminals 13 ⁇ / b> A and 13 ⁇ / b> B of the electricity storage device 11 are used, but the present invention is not limited to this.
  • the electrical storage elements 11 which comprise the electrical storage module 10, it is not restricted to the number of the said embodiment. Moreover, although the electrical storage element 11 was a battery, it is not restricted to this, For example, it is good also as a capacitor.
  • Power storage module 11 Power storage element 12: Body portion 13A, 13B: Electrode terminals 20, 31, 40, 50: Busbar 21, 37: Flat plate portions 22, 32, 42: Connection portions 25, 35: Connection portion 26 : Bending part

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Abstract

A fixed-thickness bus bar 20 connected to positive and negative electrode terminals 13A, 13B of a plurality of power storage elements 11 having the electrode terminals 13A, 13B, the bus bar 20 constituting part of a conductive path, wherein the bus bar 20 is provided with a flat plate part 21 having a flat plate surface, and a bend part 26 extending in the direction following the route of the conductive path in a shape that is bent in relation to the plate surface of the flat plate part 21 with respect to the direction intersecting the route of the conductive path.

Description

バスバー及びバスバーの製造方法Bus bar and method of manufacturing bus bar
　本明細書では、バスバーに関する技術を開示する。 In this specification, technology related to bus bars is disclosed.
　電気自動車やハイブリッド自動車等の蓄電モジュールは、正極及び負極の電極端子を有する複数の蓄電素子の隣り合う電極端子間がバスバーで接続されることにより複数の蓄電素子が直列や並列に接続されている。 In a power storage module such as an electric vehicle or a hybrid vehicle, a plurality of power storage elements are connected in series or in parallel by connecting adjacent electrode terminals of a plurality of power storage elements having positive and negative electrode terminals with a bus bar. .
　下記特許文献１では、複数の角型バッテリからなるバッテリ集合体に装着されたバッテリ接続プレートに複数のバスバーが埋設されており、各バスバーが電極にボルト等によりねじ締め固定されることにより、複数の角型バッテリの隣り合う電極間がバスバーで接続されている。 In the following Patent Document 1, a plurality of bus bars are embedded in a battery connection plate mounted on a battery assembly composed of a plurality of square batteries, and each bus bar is screwed and fixed to an electrode with a bolt or the like. The adjacent electrodes of the square battery are connected by a bus bar.
特開２０００－１４９９０９号公報JP 2000-149909 A
　ところで、バスバーの形状は、断面積が一定である場合、板厚を薄くし、電極間の接続方向に対して直交する方向である幅方向の寸法を大きくすればバスバーの表面積が大きくなるため、放熱性の観点から好ましい。しかしながら、バスバーの幅方向の寸法を大きくすると、バスバーを配置するスペースが大きくなり、バスバーが装着される蓄電モジュール等の部材の小型化の要請に反するという問題がある。 By the way, if the cross-sectional area of the shape of the bus bar is constant, the surface area of the bus bar increases if the plate thickness is reduced and the dimension in the width direction, which is the direction orthogonal to the connection direction between the electrodes, is increased. It is preferable from the viewpoint of heat dissipation. However, when the dimension of the bus bar in the width direction is increased, there is a problem that a space for arranging the bus bar is increased, which is contrary to a request for downsizing a member such as a power storage module to which the bus bar is mounted.
　本明細書に記載された技術は、上記のような事情に基づいて完成されたものであって、板厚を薄くした場合であっても大型化を抑制することが可能なバスバーを提供することを目的とする。 The technology described in the present specification has been completed based on the above circumstances, and provides a bus bar capable of suppressing an increase in size even when the plate thickness is reduced. With the goal.
　本明細書に記載されたバスバーは、正極及び負極の電極端子を有する複数の蓄電素子の前記電極端子に接続されて導電路を構成する一定の厚み寸法のバスバーであって、平坦な板面を有する平板部と、前記導電路の経路と交差する方向について前記平板部の板面に対して曲がった形状で、前記導電路の経路に沿う方向に延びる曲げ部と、を備える。 The bus bar described in the present specification is a bus bar having a constant thickness dimension that is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path, and has a flat plate surface. And a bent portion extending in a direction along the path of the conductive path in a shape bent with respect to the plate surface of the flat plate section in a direction intersecting with the path of the conductive path.
　本明細書に記載されたバスバーの製造方法は、正極及び負極の電極端子を有する複数の蓄電素子の前記電極端子に接続されて導電路を構成する一定の厚み寸法のバスバーの製造方法であって、平坦な板面を有する平板状の金属板材に対して、前記導電路の経路と交差する方向について前記板面に対して曲がった形状で、前記導電路の経路に沿う方向に延びる曲げ部を形成する。 The bus bar manufacturing method described in this specification is a method for manufacturing a bus bar having a certain thickness dimension that is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path. A bent portion extending in a direction along the path of the conductive path in a shape bent with respect to the plate surface in a direction intersecting the path of the conductive path with respect to a flat metal plate material having a flat plate surface Form.
　本構成によれば、導電路の経路と交差する方向について曲げ部の曲がった形状により、導電路の経路方向に対する幅方向の寸法の増加を抑制しつつバスバーの表面積を大きくすることができる。これにより、バスバーの板厚を薄くして表面積を大きくしても幅方向の寸法を抑制できるため、大型化を抑制することが可能となる。
　なお、「一定の厚み寸法」には、厚み寸法がわずかに変化する構成が含まれる。例えば、一定の厚みの金属板材をプレス機の金型による曲げ加工で曲げ部を形成した際に生じる曲げ部と平板部との厚み寸法の大きさのずれは、一定の厚み寸法の範囲に含まれるものとすることができる。 According to this configuration, the curved surface of the bending portion in the direction intersecting the path of the conductive path can increase the surface area of the bus bar while suppressing an increase in the dimension in the width direction with respect to the path direction of the conductive path. As a result, the size in the width direction can be suppressed even if the plate thickness of the bus bar is reduced and the surface area is increased, so that the increase in size can be suppressed.
The “constant thickness dimension” includes a configuration in which the thickness dimension slightly changes. For example, the deviation of the thickness dimension between the bent portion and the flat plate portion that occurs when a bent portion is formed by bending a metal plate material of a constant thickness with a die of a press machine is included in the range of the constant thickness dimension. Can be.
　本明細書に記載された技術の実施態様としては以下の態様が好ましい。
　前記曲げ部は、山部と谷部とからなる波形に曲がった形状とされている。
　このようにすれば、バスバーの表面積を大きくすることができる。 The following embodiments are preferable as the embodiments of the technology described in this specification.
The bent portion is bent into a waveform composed of a peak portion and a valley portion.
In this way, the surface area of the bus bar can be increased.
　前記平板部は、一対の前記電極端子に接続される一対の接続部を備え、前記一対の接続部を結ぶ方向に対して前記導電路が迂回するように前記一対の接続部を連結する連結部を有し、当該連結部に前記曲げ部が形成されている。
　このようにすれば、連結部により導電路が迂回する長さに応じてバスバーの表面積を増やすことができる。 The flat plate portion includes a pair of connection portions connected to the pair of electrode terminals, and a connection portion that connects the pair of connection portions so that the conductive path bypasses in a direction connecting the pair of connection portions. And the bent portion is formed in the connecting portion.
If it does in this way, the surface area of a bus-bar can be increased according to the length which a conductive path detours by a connection part.
　本明細書に記載された技術によれば、バスバーの板厚を薄くした場合であっても大型化を抑制することが可能となる。 According to the technique described in this specification, it is possible to suppress an increase in size even when the thickness of the bus bar is reduced.
実施形態１の蓄電モジュールを示す平面図The top view which shows the electrical storage module of Embodiment 1. バスバーを示す平面図Top view showing the bus bar バスバーを示す右側面図Right side view showing the busbar 実施形態２の蓄電モジュールを示す平面図The top view which shows the electrical storage module of Embodiment 2. バスバーを示す平面図Top view showing the bus bar バスバーを示す右側面図Right side view showing the busbar 他の実施形態のバスバーを示す平面図The top view which shows the bus-bar of other embodiment 他の実施形態のバスバーを示す平面図The top view which shows the bus-bar of other embodiment
　＜実施形態１＞
　実施形態１について、図１～図３を参照しつつ説明する。
　本実施形態のバスバー２０は、蓄電モジュール１０に装着される。蓄電モジュール１０は、例えば電気自動車又はハイブリッド自動車等の車両に搭載されて、車両を駆動するための電源として使用される。以下では、Ｘ方向を前方、Ｙ方向を左方、Ｚ方向を上方として説明する。 <Embodiment 1>
The first embodiment will be described with reference to FIGS.
The bus bar 20 of this embodiment is attached to the power storage module 10. The power storage module 10 is mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and is used as a power source for driving the vehicle. In the following description, the X direction is the front, the Y direction is the left, and the Z direction is the upper.
（蓄電モジュール１０）
　蓄電モジュール１０は、図１に示すように、左右に並んだ複数（本実施形態では２個）の蓄電素子１１と、複数の蓄電素子１１に取付けられるバスバー２０とを備える。各蓄電素子１１は、扁平な直方体状のケースの内部に蓄電要素（図示しない）が収容された箱形の本体部１２と、本体部１２の上面から垂直に突出するボルト状の電極端子１３Ａ，１３Ｂ（正極を１３Ａ，負極を１３Ｂとして図示）とを備える。電極端子１３Ａ，１３Ｂは、バスバー２０の板面が載置される平坦な長方形状の台座部を有する。なお、電極端子１３Ａ，１３Ｂは、例えばナット状としてボルトで締結するようにしてもよい。 (Storage module 10)
As shown in FIG. 1, the power storage module 10 includes a plurality (two in the present embodiment) of power storage elements 11 arranged on the left and right, and a bus bar 20 attached to the plurality of power storage elements 11. Each power storage element 11 includes a box-shaped main body 12 in which a power storage element (not shown) is accommodated in a flat rectangular parallelepiped case, and bolt-shaped electrode terminals 13A that protrude vertically from the upper surface of the main body 12. 13B (illustrated as positive electrode 13A and negative electrode 13B). The electrode terminals 13 </ b> A and 13 </ b> B have a flat rectangular base portion on which the plate surface of the bus bar 20 is placed. The electrode terminals 13A and 13B may be fastened with bolts, for example, as nuts.
　複数の蓄電素子１１の極性（正負）の向きは、互いに隣り合う蓄電素子１１が逆向きになるように配置されており、これにより、互いに異極の電極端子１３Ａ，１３Ｂが隣り合うように構成されている。直列接続の端部に位置する前側の電極端子１３Ａ，１３Ｂは、図示しない電線を介して外部のインバータ等の機器に接続される。 The polarity (positive / negative) direction of the plurality of power storage elements 11 is arranged so that the power storage elements 11 adjacent to each other are opposite to each other, and thereby the electrode terminals 13A and 13B having different polarities are adjacent to each other. Has been. The front electrode terminals 13A and 13B located at the end of the series connection are connected to an external device such as an inverter via an electric wire (not shown).
（バスバー２０）
　バスバー２０は、例えば銅、銅合金、アルミニウム、アルミニウム合金、ステンレス鋼（ＳＵＳ）等の一定の厚み寸法の金属板材からなり、図２，図３に示すように、略Ｕ字状の導電路を形成しており、一対の電極端子１３Ａ，１３Ｂに接続される一対の接続部２２と、一対の接続部２２（及び一対の電極端子１３Ａ，１３Ｂ）を直線的に結ぶ方向（左右方向）に対して導電路が迂回するように連結する連結部２５を有する。 (Bus bar 20)
The bus bar 20 is made of a metal plate material having a certain thickness such as copper, copper alloy, aluminum, aluminum alloy, stainless steel (SUS), etc., and has a substantially U-shaped conductive path as shown in FIGS. The pair of connection portions 22 connected to the pair of electrode terminals 13A and 13B and the pair of connection portions 22 (and the pair of electrode terminals 13A and 13B) are linearly connected to the direction (left and right direction). The connecting portion 25 is connected so as to bypass the conductive path.
　接続部２２には、ボルト状の電極端子１３Ａ，１３Ｂを挿通可能な円形状の通し孔２３が貫通形成されている。電極端子１３Ａ，１３を通し孔２３に通し、ナットで締結することで、電極端子１３Ａ，１３Ｂと接続部２２とが接続される。 A circular through hole 23 through which the bolt- shaped electrode terminals 13A and 13B can be inserted is formed through the connecting portion 22. The electrode terminals 13A and 13B and the connecting portion 22 are connected by passing the electrode terminals 13A and 13 through the through hole 23 and fastening them with nuts.
　また、上記したバスバー２０は、平坦な板面を有し、接続部２２の全体及び連結部２５の一部を含む平板部２１と、連結部２５に形成され、導電路の経路（連結部２５において左右方向に延びる経路）と直交する方向（前後方向。「導電路の経路と交差する方向」の一例）について平板部２１の面に対して曲がった形状の曲げ部２６と、を備える。 The above-described bus bar 20 has a flat plate surface, and is formed in the flat plate portion 21 including the entire connection portion 22 and a part of the connection portion 25, and the connection portion 25, and the path of the conductive path (the connection portion 25). And a bent portion 26 having a shape bent with respect to the surface of the flat plate portion 21 in a direction (front-rear direction; an example of “a direction intersecting the path of the conductive path”) orthogonal to the path extending in the left-right direction in FIG.
　曲げ部２６は、連結部２５の左右方向の全長に亘って左右方向（導電路の経路に沿う方向）に延びており、上方に突出する１つの山部２７Ａと、山部２７Ａの両脇で下方に窪んだ複数の谷部２７Ｂとを有し、山部２７Ａと谷部２７Ｂが交互に連なることで波形の形状とされている。 The bent portion 26 extends in the left-right direction (the direction along the path of the conductive path) over the entire length of the connecting portion 25 in the left-right direction, on one side of the peak portion 27A protruding upward and on both sides of the peak portion 27A. It has a plurality of valleys 27B recessed downward, and the peaks 27A and valleys 27B are alternately connected to form a waveform.
　このバスバー２０の製造方法は、プレス機の金型に金属板材を載置し、この金属板材に金型で打ち抜き加工及び曲げ加工を施して製造することができる。 The manufacturing method of the bus bar 20 can be manufactured by placing a metal plate material on a die of a press machine and punching and bending the metal plate material with a die.
　上記実施形態の構成によれば、以下の作用・効果を奏する。
　バスバー２０は、正極及び負極の電極端子１３Ａ，１３Ｂを有する複数の蓄電素子１１の電極端子１３Ａ，１３Ｂに接続されて導電路を構成する一定の厚み寸法のバスバー２０であって、平坦な板面を有する平板部２１と、前後方向（導電路の経路と交差する方向）について平板部２１の板面に対して曲がった形状で、左右方向（導電路の経路に沿う方向）に延びる曲げ部２６と、を備える。 According to the structure of the said embodiment, there exist the following effects.
The bus bar 20 is a bus bar 20 of a certain thickness dimension that is connected to the electrode terminals 13A and 13B of the plurality of power storage elements 11 having the positive and negative electrode terminals 13A and 13B to form a conductive path, and is a flat plate surface And a bent portion 26 that extends in the left-right direction (direction along the path of the conductive path) in a shape bent with respect to the plate surface of the flat plate section 21 in the front-rear direction (direction intersecting the path of the conductive path). And comprising.
　本実施形態によれば、前後方向について曲げ部２６の曲がった形状により、導電路の経路方向に対する幅方向（前後方向）の寸法の増加を抑制しつつバスバー２０の表面積を大きくすることができる。これにより、バスバー２０の板厚を薄くして表面積を大きくしても導電路の経路方向に対する幅方向の寸法を抑制できるため、大型化を抑制することが可能となる。
　なお、「一定の厚み寸法」には、厚み寸法がわずかに変化する構成が含まれる。例えば、一定の厚みの金属板材をプレス機の金型による曲げ加工で曲げ部２６を形成した際に生じる曲げ部２６と接続部２２（及び平板部２１）との厚み寸法の大きさのずれは、一定の厚み寸法の範囲に含まれるものとすることができる。 According to the present embodiment, due to the bent shape of the bent portion 26 in the front-rear direction, the surface area of the bus bar 20 can be increased while suppressing an increase in the dimension in the width direction (front-rear direction) with respect to the path direction of the conductive path. Thereby, since the dimension of the width direction with respect to the path | route direction of an electroconductive path can be suppressed even if the board | plate thickness of the bus-bar 20 is made thin and a surface area is enlarged, it becomes possible to suppress an enlargement.
The “constant thickness dimension” includes a configuration in which the thickness dimension slightly changes. For example, the deviation of the thickness dimension between the bent portion 26 and the connecting portion 22 (and the flat plate portion 21) generated when the bent portion 26 is formed by bending a metal plate material having a constant thickness with a die of a press machine. , And can be included in a range of a certain thickness dimension.
　また、曲げ部２６は、山部２７Ａと谷部２７Ｂとからなる波形に曲がった形状とされている。
　このようにすれば、例えば、山部２７Ａや谷部２７Ｂの一方のみから曲げ部を形成する構成と比較して、バスバー２０の表面積を大きくすることができる。 Moreover, the bending part 26 is made into the shape bent in the waveform which consists of the peak part 27A and the trough part 27B.
In this way, for example, the surface area of the bus bar 20 can be increased as compared with the configuration in which the bent portion is formed only from one of the peak portion 27A and the valley portion 27B.
　また、平板部２１は、一対の電極端子１３Ａ，１３Ｂに接続される一対の接続部２２を備え、一対の接続部２２の通し孔２３を短い経路で結ぶ方向に対して導電路が迂回するように一対の接続部２２を連結する連結部２５を有し、当該連結部２５に曲げ部２６が形成されている。 The flat plate portion 21 includes a pair of connection portions 22 connected to the pair of electrode terminals 13A and 13B, and the conductive path bypasses the direction in which the through holes 23 of the pair of connection portions 22 are connected by a short path. The connecting portion 25 is connected to a pair of connecting portions 22, and a bent portion 26 is formed in the connecting portion 25.
　このようにすれば、連結部２５により導電路が迂回する長さに応じてバスバー２０の表面積を増やすことができる。 In this way, the surface area of the bus bar 20 can be increased according to the length of the conductive path detoured by the connecting portion 25.
　＜実施形態２＞
　実施形態２について、図４～図６を参照しつつ説明する。実施形態２の蓄電モジュール３０は、クランク状の導電路を構成するバスバー３１を用いたものである。以下では実施形態１と同一の構成については同一の符号を付して説明を省略する。 <Embodiment 2>
Embodiment 2 will be described with reference to FIGS. 4 to 6. FIG. The power storage module 30 of the second embodiment uses a bus bar 31 that constitutes a crank-shaped conductive path. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
　図４に示すように、蓄電モジュール３０における隣り合う蓄電素子１１の向きは、実施形態１とは異なり、互いに同じ向きとされており、隣り合う電極端子１３Ａ，１３Ａ（１３Ｂ，１３Ｂ）は同一の極性とされている。 As shown in FIG. 4, the direction of the adjacent power storage elements 11 in the power storage module 30 is the same as that of the first embodiment, and the adjacent electrode terminals 13A and 13A (13B and 13B) are the same. It is polar.
　バスバー３１は、図５，図６に示すように、平坦な板面を有する平板状の平板部３７と、曲げ部２６と、を備える。また、バスバー３１は、一対の電極端子１３Ａ，１３Ｂに接続される一対の接続部３２と、一対の接続部３２を結ぶ方向（斜めの方向）に対して導電路が迂回するように一対の接続部３２をクランク状に連結する連結部３５を有する。 As shown in FIGS. 5 and 6, the bus bar 31 includes a flat plate portion 37 having a flat plate surface and a bent portion 26. In addition, the bus bar 31 has a pair of connection portions 32 connected to the pair of electrode terminals 13A and 13B and a pair of connection portions so that the conductive path bypasses the direction connecting the pair of connection portions 32 (an oblique direction). It has the connection part 35 which connects the part 32 in a crank shape.
　連結部３５には、左右方向（当該連結部が連結する方向に沿う方向）に延びる曲げ部２６が形成されている。接続部３２は、平板部３７に形成されており、ボルト状の電極端子１３Ａ，１３Ｂを挿通可能な円形状の通し孔３３が貫通形成されている。
　実施形態２によれば、隣り合う蓄電素子１１間の組付精度の誤差（前後方向の誤差）に応じて曲げ部２６が組付公差の方向（前後方向）に伸縮して誤差を吸収することが可能になるため、隣り合う蓄電素子１１間の組付精度の誤差に起因したバスバー３１の電極端子１３Ａ，１３Ｂへの組付けの不具合を抑制することができる。 The connecting portion 35 is formed with a bent portion 26 extending in the left-right direction (the direction along the direction in which the connecting portion is connected). The connecting portion 32 is formed in the flat plate portion 37, and a circular through hole 33 through which the bolt-shaped electrode terminals 13A and 13B can be inserted is formed.
According to the second embodiment, the bending portion 26 expands and contracts in the direction of assembly tolerance (front-rear direction) according to the assembly accuracy error (front-rear direction error) between the adjacent power storage elements 11 to absorb the error. Therefore, it is possible to suppress a problem in assembling the bus bar 31 to the electrode terminals 13A and 13B due to an error in assembling accuracy between the adjacent power storage elements 11.
　＜他の実施形態＞
　本明細書に記載された技術は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本細書に記載された技術に含まれる。
（１）曲げ部２６の形状は、上記実施形態の形状に限られない。例えば、複数の山部２７Ａを有していてもよい。また、谷部２７Ｂは１つであってもよい。また、曲げ部は、山部２７Ａと谷部２７Ｂの一方のみを有していてもよい。 <Other embodiments>
The technology described in the present specification is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technology described in this specification.
(1) The shape of the bending part 26 is not restricted to the shape of the said embodiment. For example, you may have several peak part 27A. Moreover, the trough part 27B may be one. Moreover, the bending part may have only one of the peak part 27A and the trough part 27B.
（２）上記実施形態では、電極端子１３Ａ，１３Ｂにバスバー２０，３１をボルト締結する構成としたが、これに限られない。例えば、電極端子１３Ａ，１３Ｂに対してバスバー４０，５０をレーザー溶接により接続してもよい。例えば、図７のバスバー４０のように、実施形態１のバスバー２０の通し孔２３をなくしてレーザー溶接する接続部４２としたり、図８のバスバー５０のように、実施形態２のバスバー３１の通し孔３３をなくしてレーザー溶接する接続部２２としてもよい。レーザー溶接により接続する場合には、バスバー２０，３１を電極端子１３Ａ，１３Ｂに対してボルト締結する構成と比較して、板厚が薄い方が溶接性が良くなるため好ましい。また、レーザー溶接に限られず、例えば超音波溶接や抵抗溶接等の他の接続手段を用いてもよい。 (2) In the above embodiment, the bus bars 20 and 31 are bolted to the electrode terminals 13A and 13B. However, the present invention is not limited to this. For example, the bus bars 40 and 50 may be connected to the electrode terminals 13A and 13B by laser welding. For example, the through-hole 23 of the bus bar 20 of the first embodiment is eliminated as in the bus bar 40 of FIG. 7, and the connection portion 42 is formed by laser welding, or the bus bar 31 of the second embodiment is passed through like the bus bar 50 of FIG. It is good also as the connection part 22 which loses the hole 33 and is laser-welded. In the case of connecting by laser welding, it is preferable that the plate thickness is thinner as compared with the configuration in which the bus bars 20 and 31 are bolted to the electrode terminals 13A and 13B because the weldability is improved. Moreover, it is not restricted to laser welding, For example, you may use other connection means, such as ultrasonic welding and resistance welding.
（３）上記実施形態では、蓄電素子１１の電極端子１３Ａ，１３Ｂ間を接続するバスバー２０，３１，４０，５０としたが、これに限られない。例えば、直列接続してなる複数の蓄電素子１１における直列接続の端部の電極端子１３Ａ，１３Ｂと外部の機器や他の蓄電モジュール等との間を接続するバスバーとしてもよい。 (3) In the above embodiment, the bus bars 20, 31, 40, and 50 connecting the electrode terminals 13 </ b> A and 13 </ b> B of the electricity storage device 11 are used, but the present invention is not limited to this. For example, it is good also as a bus bar which connects between electrode terminal 13A, 13B of the end part of the serial connection in the some electrical storage element 11 formed in series, and an external apparatus, another electrical storage module, etc.
（４）蓄電モジュール１０を構成する蓄電素子１１の数については、上記実施形態の個数に限られない。また、蓄電素子１１は電池としたが、これに限られず、例えばキャパシタとしてもよい。 (4) About the number of the electrical storage elements 11 which comprise the electrical storage module 10, it is not restricted to the number of the said embodiment. Moreover, although the electrical storage element 11 was a battery, it is not restricted to this, For example, it is good also as a capacitor.
（５）バスバー２０，３１，４０，５０を絶縁性の合成樹脂からなる絶縁プロテクタに保持するようにしてもよい。 (5) You may make it hold | maintain the bus- bar 20, 31, 40, 50 to the insulation protector which consists of an insulating synthetic resin.
１０，３０：　蓄電モジュール
１１：　蓄電素子
１２：　本体部
１３Ａ，１３Ｂ：　電極端子
２０，３１，４０，５０：バスバー
２１，３７：　平板部
２２，３２，４２：　接続部
２５，３５：　連結部
２６：　曲げ部 10, 30: Power storage module 11: Power storage element 12: Body portion 13A, 13B: Electrode terminals 20, 31, 40, 50: Busbar 21, 37: Flat plate portions 22, 32, 42: Connection portions 25, 35: Connection portion 26 : Bending part

Claims (4)

  1. 正極及び負極の電極端子を有する複数の蓄電素子の前記電極端子に接続されて導電路を構成する一定の厚み寸法のバスバーであって、
    　平坦な板面を有する平板部と、
    　前記導電路の経路と交差する方向について前記平板部の板面に対して曲がった形状で、前記導電路の経路に沿う方向に延びる曲げ部と、を備える、バスバー。     A bus bar having a constant thickness dimension, which is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path,
    A flat plate portion having a flat plate surface;
    A bus bar comprising: a bent portion extending in a direction along the path of the conductive path in a shape bent with respect to the plate surface of the flat plate portion in a direction intersecting the path of the conductive path.
  2. 前記曲げ部は、山部と谷部とからなる波形に曲がった形状とされている請求項１に記載のバスバー。 The bus bar according to claim 1, wherein the bent portion is bent into a waveform including a peak portion and a valley portion.
  3. 前記平板部は、一対の前記電極端子に接続される一対の接続部を備え、
    　前記一対の接続部を結ぶ方向に対して前記導電路が迂回するように前記一対の接続部を連結する連結部を有し、当該連結部に前記曲げ部が形成されている請求項１又は請求項２に記載のバスバー。     The flat plate portion includes a pair of connection portions connected to the pair of electrode terminals,
    The connection part which connects the pair of connection parts so that the conductive path is detoured in the direction connecting the pair of connection parts, and the bending part is formed in the connection part. Item 3. A bus bar according to item 2.
  4. 正極及び負極の電極端子を有する複数の蓄電素子の前記電極端子に接続されて導電路を構成する一定の厚み寸法のバスバーの製造方法であって、
    　平坦な板面を有する平板状の金属板材に対して、前記導電路の経路と交差する方向について前記板面に対して曲がった形状で、前記導電路の経路に沿う方向に延びる曲げ部を形成するバスバーの製造方法。     A method of manufacturing a bus bar having a constant thickness dimension that is connected to the electrode terminals of a plurality of power storage elements having positive and negative electrode terminals to form a conductive path,
    A bent portion extending in a direction along the path of the conductive path is formed in a shape bent with respect to the plate surface in a direction intersecting the path of the conductive path with respect to a flat metal plate material having a flat plate surface. A method of manufacturing a bus bar.
PCT/JP2017/001653 2016-02-09 2017-01-19 Bus bar and method for producing bus bar WO2017138318A1 (en)

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WO2009041018A1 (en) * 2007-09-28 2009-04-02 Kabushiki Kaisha Toshiba Battery pack
JP2010113961A (en) * 2008-11-06 2010-05-20 Denso Corp Battery pack
JP2010212155A (en) * 2009-03-11 2010-09-24 Mitsubishi Heavy Ind Ltd Terminal connecting member material and battery pack
JP2012155948A (en) * 2011-01-25 2012-08-16 Auto Network Gijutsu Kenkyusho:Kk Bus bar for battery pack and bus bar module
JP2014165044A (en) * 2013-02-26 2014-09-08 Auto Network Gijutsu Kenkyusho:Kk Connection member and wiring module
JP2015099759A (en) * 2013-11-20 2015-05-28 株式会社東芝 Bus bar for battery pack and battery pack
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WO2009041018A1 (en) * 2007-09-28 2009-04-02 Kabushiki Kaisha Toshiba Battery pack
JP2010113961A (en) * 2008-11-06 2010-05-20 Denso Corp Battery pack
JP2010212155A (en) * 2009-03-11 2010-09-24 Mitsubishi Heavy Ind Ltd Terminal connecting member material and battery pack
JP2012155948A (en) * 2011-01-25 2012-08-16 Auto Network Gijutsu Kenkyusho:Kk Bus bar for battery pack and bus bar module
JP2014165044A (en) * 2013-02-26 2014-09-08 Auto Network Gijutsu Kenkyusho:Kk Connection member and wiring module
JP2015099759A (en) * 2013-11-20 2015-05-28 株式会社東芝 Bus bar for battery pack and battery pack
US20160308187A1 (en) * 2015-04-14 2016-10-20 Ford Global Technologies, Llc Busbar Assembly for Vehicle Traction Battery

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3624218B1 (en) * 2018-09-14 2021-05-05 Contemporary Amperex Technology Co., Limited Battery module

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