JP2021118154A - Bus bar - Google Patents

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JP2021118154A
JP2021118154A JP2020012566A JP2020012566A JP2021118154A JP 2021118154 A JP2021118154 A JP 2021118154A JP 2020012566 A JP2020012566 A JP 2020012566A JP 2020012566 A JP2020012566 A JP 2020012566A JP 2021118154 A JP2021118154 A JP 2021118154A
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Prior art keywords
bus bar
inspection range
connection
index unit
index
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Inventor
善久 山口
Yoshihisa Yamaguchi
善久 山口
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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Priority to JP2020012566A priority Critical patent/JP2021118154A/en
Priority to PCT/JP2021/002164 priority patent/WO2021153436A1/en
Publication of JP2021118154A publication Critical patent/JP2021118154A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-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
    • H01R4/58—Electrically-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 characterised by the form or material of the contacting members
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

To provide a bus bar capable of achieving an improvement in yield.SOLUTION: A bus bar 10 includes: a connection 12 connected to a connection target such as an electrode terminal of a battery cell; and an index part 14 indicating an inspection range including the connection 12. With this configuration, the inspection range can be easily grasped by the index part 14 when the presence of scratches or dirt on the bus bar 10 is visually inspected. Thus, defective products having scratches or dirt within the inspection range can be more clearly identified.SELECTED DRAWING: Figure 1

Description

本開示は、バスバーに関するものである。 The present disclosure relates to a busbar.

例えば、特許文献１には、電池配線モジュールに用いられるバスバーが記載されている。同バスバーは、電池セルの電極端子などの接続対象に対し、例えばレーザー溶接にて接続されている。 For example, Patent Document 1 describes a bus bar used in a battery wiring module. The bus bar is connected to a connection target such as an electrode terminal of a battery cell by, for example, laser welding.

特開２０１９−３８５７号公報Japanese Unexamined Patent Publication No. 2019-3857

上記のようなバスバーにおいて、接続対象と接続される予定の箇所に傷や油分などの汚れが付いていると、バスバーと接続対象との溶接に際して支障が出てしまう。特に、バスバーと接続対象とをレーザー溶接にて接続する場合には、レーザー溶接箇所における傷や汚れの付着の影響がより顕著となる。このため、バスバーに傷や汚れが付いていないか検査する必要があるが、その検査に際し、良品と不良品とをより確実に見分けることが歩留まりの向上に寄与する。 In the above-mentioned bus bar, if the part to be connected to the connection target is scratched or dirty such as oil, the welding between the bus bar and the connection target will be hindered. In particular, when the bus bar and the connection target are connected by laser welding, the influence of scratches and dirt adhering to the laser welded portion becomes more remarkable. For this reason, it is necessary to inspect the bus bar for scratches and dirt, but in the inspection, it is necessary to more reliably distinguish between non-defective products and defective products, which contributes to the improvement of yield.

そこで、歩留まりの向上を可能としたバスバーを提供することを目的とする。 Therefore, it is an object of the present invention to provide a bus bar which can improve the yield.

本開示のバスバーは、接続対象に接続される接続部と、前記接続部を含む検査範囲を示す指標部と、を備える。 The bus bar of the present disclosure includes a connection portion connected to a connection target and an index portion indicating an inspection range including the connection portion.

本開示によれば、歩留まりの向上を可能としたバスバーを提供することが可能となる。 According to the present disclosure, it is possible to provide a bus bar capable of improving the yield.

図１は、実施形態におけるバスバーの平面図である。FIG. 1 is a plan view of the bus bar according to the embodiment. 図２は、同形態におけるバスバーと接続対象とのレーザー溶接の態様を示す模式図である。FIG. 2 is a schematic view showing a mode of laser welding between the bus bar and the connection target in the same embodiment.

［本開示の実施形態の説明］
最初に本開示の実施態様を列記して説明する。
本開示のバスバーは、
［１］接続対象に接続される接続部と、前記接続部を含む検査範囲を示す指標部と、を備える。 [Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described.
The busbar of this disclosure is
[1] A connection unit connected to the connection target and an index unit indicating an inspection range including the connection unit are provided.

この構成によれば、バスバーの傷や汚れの有無を目視で検査するに際し、指標部によって検査範囲を容易に把握できる。このため、検査範囲内に傷や汚れがある不良品をより明確に見分けることができ、その結果、歩留まりを向上させることが可能となる。 According to this configuration, when visually inspecting the presence or absence of scratches or stains on the bus bar, the inspection range can be easily grasped by the index unit. Therefore, defective products having scratches or stains within the inspection range can be more clearly identified, and as a result, the yield can be improved.

［２］前記指標部は、前記検査範囲の外周縁に沿った線状をなすことが好ましい。
この構成によれば、線状の指標部によって検査範囲をより好適に把握することが可能となる。 [2] The index unit preferably has a linear shape along the outer peripheral edge of the inspection range.
According to this configuration, the inspection range can be more preferably grasped by the linear index unit.

［３］前記指標部は、前記検査範囲の外周縁に沿った閉ループ状に形成されていることが好ましい。
この構成によれば、閉ループ状の指標部によって検査範囲をより好適に把握することが可能となる。 [3] The index portion is preferably formed in a closed loop shape along the outer peripheral edge of the inspection range.
According to this configuration, the inspection range can be more preferably grasped by the closed loop index portion.

［４］前記指標部は、バスバー表面に凹設された溝状をなすことが好ましい。
この構成によれば、指標部を印刷などにより形成する場合に比べ、指標部を形成する際にバスバーに汚れが付着しにくくより好適である。 [4] The index portion preferably has a groove shape recessed in the surface of the bus bar.
According to this configuration, it is more preferable that the bus bar is less likely to be stained when the index portion is formed, as compared with the case where the index portion is formed by printing or the like.

［５］前記接続部は、前記接続対象にレーザー溶接されるレーザー溶接部であることが好ましい。
この構成によれば、接続対象にレーザー溶接されるバスバーの歩留まりを向上させることが可能となる。 [5] The connection portion is preferably a laser welded portion that is laser welded to the connection target.
According to this configuration, it is possible to improve the yield of the bus bar laser-welded to the connection target.

［本開示の実施形態の詳細］
本開示のバスバーの具体例を、以下に図面を参照しつつ説明する。なお、本発明はこれらの例示に限定されるものではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。また、図面では、説明の便宜上、構成の一部を誇張して示す場合があり、各部分の寸法比率についても、実際と異なる場合がある。 [Details of Embodiments of the present disclosure]
A specific example of the bus bar of the present disclosure will be described below with reference to the drawings. It should be noted that the present invention is not limited to these examples, and is indicated by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims. Further, in the drawings, for convenience of explanation, a part of the configuration may be exaggerated, and the dimensional ratio of each part may be different from the actual one.

図１に示す本実施形態のバスバー１０は、例えば、車両用の電池配線モジュールに用いられるものである。本実施形態のバスバー１０は、金属板材からプレスによって形成されるものであり、板状をなしている。 The bus bar 10 of the present embodiment shown in FIG. 1 is used, for example, in a battery wiring module for a vehicle. The bus bar 10 of the present embodiment is formed by pressing from a metal plate material and has a plate shape.

バスバー１０は、同バスバー１０の第１主面１１において、接続対象が接続される予定の接続部１２を複数備えている。本実施形態のバスバー１０は、前記電池配線モジュールにおける電池セル２０に接続される（図２参照）。 The bus bar 10 includes a plurality of connecting portions 12 to which the connection target is to be connected on the first main surface 11 of the bus bar 10. The bus bar 10 of the present embodiment is connected to the battery cell 20 in the battery wiring module (see FIG. 2).

詳しくは、図２に示すように、電池セル２０は接続対象としての電極端子２１を備え、電極端子２１がバスバー１０の各接続部１２にレーザー溶接によって接続される。すなわち、各接続部１２は、接続対象としての電極端子２１にレーザー溶接されるレーザー溶接部である。なお、本実施形態の電極端子２１は、例えば電池セル２０のタブリードからなる。また、電極端子２１とバスバー１０とのレーザー溶接の際には、電極端子２１を第１主面１１の接続部１２に接触させた状態とし、第１主面１１の裏側の第２主面１３側から接続部１２に対応する部位にレーザー光Ｌを照射する。 Specifically, as shown in FIG. 2, the battery cell 20 includes an electrode terminal 21 as a connection target, and the electrode terminal 21 is connected to each connection portion 12 of the bus bar 10 by laser welding. That is, each connecting portion 12 is a laser welding portion that is laser welded to the electrode terminal 21 as a connection target. The electrode terminal 21 of this embodiment is composed of, for example, a tab lead of a battery cell 20. Further, when laser welding the electrode terminal 21 and the bus bar 10, the electrode terminal 21 is brought into contact with the connecting portion 12 of the first main surface 11, and the second main surface 13 on the back side of the first main surface 11 is brought into contact with the connection portion 12. The laser beam L is irradiated from the side to the portion corresponding to the connecting portion 12.

ここで、図１に示すように、バスバー１０の第１主面１１には、傷や汚れの有無を目視で確認する検査における検査範囲Ａを示す指標部１４が形成されている。検査範囲Ａは接続部１２毎に設定され、各検査範囲Ａはそれぞれ接続部１２を含む範囲に設定されている。 Here, as shown in FIG. 1, an index portion 14 indicating an inspection range A in an inspection for visually confirming the presence or absence of scratches or stains is formed on the first main surface 11 of the bus bar 10. The inspection range A is set for each connection portion 12, and each inspection range A is set to a range including the connection portion 12.

本実施形態の指標部１４は、第１主面１１に凹設された溝状をなす。なお、指標部１４はバスバー１０のプレス成形時に形成される。指標部１４は、平面視において、検査範囲Ａの外周縁に沿った線状をなしている。また、指標部１４は、検査範囲Ａの外周縁に沿って連続的な環状に形成されている。すなわち、指標部１４は閉ループ状をなしている。 The index unit 14 of the present embodiment has a groove shape recessed in the first main surface 11. The index unit 14 is formed during press molding of the bus bar 10. The index unit 14 has a linear shape along the outer peripheral edge of the inspection range A in a plan view. Further, the index unit 14 is formed in a continuous ring shape along the outer peripheral edge of the inspection range A. That is, the index unit 14 has a closed loop shape.

本実施形態の作用について説明する。
検査範囲Ａ内の傷や汚れの有無を目視で検査する際、検査範囲Ａが指標部１４によって明確となっている。このため、検査範囲Ａ外に傷や汚れがあるバスバー１０を不良品とすることなく、歩留まりの向上に寄与できる。 The operation of this embodiment will be described.
When visually inspecting the presence or absence of scratches or stains in the inspection range A, the inspection range A is clarified by the index unit 14. Therefore, it is possible to contribute to the improvement of the yield without making the bus bar 10 having scratches or stains outside the inspection range A a defective product.

なお、バスバー１０の接続部１２に傷が付いていると、レーザー溶接の際、バスバー１０と電極端子２１との間に傷に起因する隙間が生じる。また、バスバー１０の接続部１２に油分などの汚れが付着している場合においても、レーザー溶接の際、油分が蒸発してバスバー１０と電極端子２１との間に隙間が生じる。そして、バスバー１０の接続部１２と電極端子２１との間に隙間があると、それらをレーザー溶接した部分において所望する接続強度が得られないおそれがある。このため、検査範囲Ａに傷や汚れがあるバスバー１０は不良品として扱われるようになっている。 If the connection portion 12 of the bus bar 10 is scratched, a gap due to the scratch is generated between the bus bar 10 and the electrode terminal 21 during laser welding. Further, even when dirt such as oil is attached to the connecting portion 12 of the bus bar 10, the oil is evaporated during laser welding to form a gap between the bus bar 10 and the electrode terminal 21. If there is a gap between the connection portion 12 of the bus bar 10 and the electrode terminal 21, the desired connection strength may not be obtained at the portion where they are laser welded. Therefore, the bus bar 10 having scratches or stains in the inspection range A is treated as a defective product.

本実施形態の効果について説明する。
（１）バスバー１０は、電池セル２０の電極端子２１に接続される接続部１２を含む検査範囲Ａを示す指標部１４を備える。この構成によれば、バスバー１０の傷や汚れの有無を目視で検査するに際し、指標部１４によって検査範囲Ａを容易に把握できる。このため、検査範囲Ａ内に傷や汚れがある不良品をより明確に見分けることができ、その結果、バスバー１０の歩留まりを向上させることが可能となる。 The effect of this embodiment will be described.
(1) The bus bar 10 includes an index unit 14 indicating an inspection range A including a connection unit 12 connected to the electrode terminal 21 of the battery cell 20. According to this configuration, when visually inspecting the presence or absence of scratches or stains on the bus bar 10, the inspection range A can be easily grasped by the index unit 14. Therefore, defective products having scratches or stains within the inspection range A can be more clearly identified, and as a result, the yield of the bus bar 10 can be improved.

（２）指標部１４は、検査範囲Ａの外周縁に沿った線状をなすため、線状の指標部１４によって検査範囲Ａをより好適に把握することが可能となる。
（３）指標部１４は、検査範囲Ａの外周縁に沿った閉ループ状に形成されている。これにより、指標部１４が検査範囲Ａの外周縁に沿った断続的な点線状などである場合に比べて、閉ループ状の指標部１４によって検査範囲Ａをより好適に把握することが可能となる。 (2) Since the index unit 14 has a linear shape along the outer peripheral edge of the inspection range A, the linear index unit 14 can more preferably grasp the inspection range A.
(3) The index unit 14 is formed in a closed loop shape along the outer peripheral edge of the inspection range A. As a result, the inspection range A can be more preferably grasped by the closed loop-shaped index unit 14 as compared with the case where the index unit 14 has an intermittent dotted line shape along the outer peripheral edge of the inspection range A. ..

（４）指標部１４がバスバー１０の第１主面１１に凹設された溝状をなす。このため、指標部１４を印刷などにより形成する場合に比べ、指標部１４を形成する際にバスバー１０に汚れが付着しにくくより好適である。 (4) The index unit 14 has a groove shape recessed in the first main surface 11 of the bus bar 10. Therefore, as compared with the case where the index portion 14 is formed by printing or the like, it is more preferable that the bus bar 10 is less likely to be stained when the index portion 14 is formed.

（５）接続部１２は電池セル２０の電極端子２１に対してレーザー溶接にて接続されるレーザー溶接部である。この構成によれば、接続対象にレーザー溶接されるバスバー１０において、歩留まりを向上させることが可能となる。 (5) The connecting portion 12 is a laser welding portion connected to the electrode terminal 21 of the battery cell 20 by laser welding. According to this configuration, it is possible to improve the yield in the bus bar 10 that is laser-welded to the connection target.

本実施形態は、以下のように変更して実施することができる。本実施形態及び以下の変更例は、技術的に矛盾しない範囲で互いに組み合わせて実施することができる。
・指標部１４の構成は上記実施形態に限定されるものではなく、例えば、検査範囲Ａの外周縁に沿った点線状などとしてもよい。また、指標部１４は、第１主面１１に凹設された溝状に限定されず、これ以外に例えば、第１主面１１上にインクなどで印刷されたものであってもよい。 This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
The configuration of the index unit 14 is not limited to the above embodiment, and may be, for example, a dotted line along the outer peripheral edge of the inspection range A. Further, the index unit 14 is not limited to the groove shape recessed in the first main surface 11, and may be printed on the first main surface 11 with ink or the like.

・バスバー１０の形状や接続部１２の数などの構成は上記実施形態に限定されるものではなく、電池配線モジュールの構成などに応じて適宜変更可能である。
・バスバー１０の接続部１２と電極端子２１との接続は、レーザー溶接によるものに限らず、例えば超音波溶着や抵抗溶接によるものであってもよい。 The configuration such as the shape of the bus bar 10 and the number of connecting portions 12 is not limited to the above embodiment, and can be appropriately changed according to the configuration of the battery wiring module and the like.
-The connection between the connecting portion 12 of the bus bar 10 and the electrode terminal 21 is not limited to laser welding, and may be, for example, ultrasonic welding or resistance welding.

・バスバー１０の第２主面１３にも電池セルの電極端子や検圧端子などが接続される接続部がある場合には、第２主面１３の接続部を含む検査範囲を示す指標部を第２主面１３に設けてもよい。 -If the second main surface 13 of the bus bar 10 also has a connection portion to which the electrode terminal or pressure detection terminal of the battery cell is connected, an index portion indicating the inspection range including the connection portion of the second main surface 13 is used. It may be provided on the second main surface 13.

・バスバー１０の用途は、車両用の電池配線モジュールに限定されるものではなく、それ他の装置に用いてもよい。すなわち、バスバー１０に接続される接続対象は、電池セル２０の電極端子２１に限定されるものではない。 -The use of the bus bar 10 is not limited to the battery wiring module for vehicles, and may be used for other devices. That is, the connection target connected to the bus bar 10 is not limited to the electrode terminal 21 of the battery cell 20.

１０ バスバー
１１ 第１主面
１２ 接続部（レーザー溶接部）
１３ 第２主面
１４ 指標部
２０ 電池セル
２１ 電極端子（接続対象）
Ａ 検査範囲
Ｌ レーザー光 10 Bus bar 11 1st main surface 12 Connection part (laser welded part)
13 2nd main surface 14 Indicator 20 Battery cell 21 Electrode terminal (connection target)
A Inspection range L Laser light

Claims (5)

接続対象に接続される接続部と、
前記接続部を含む検査範囲を示す指標部と、を備えたバスバー。 The connection part connected to the connection target and
A bus bar including an index unit indicating an inspection range including the connection unit. 前記指標部は、前記検査範囲の外周縁に沿った線状をなす、請求項１に記載のバスバー。 The bus bar according to claim 1, wherein the index unit has a linear shape along the outer peripheral edge of the inspection range. 前記指標部は、前記検査範囲の外周縁に沿った閉ループ状に形成されている、請求項２に記載のバスバー。 The bus bar according to claim 2, wherein the index unit is formed in a closed loop shape along the outer peripheral edge of the inspection range. 前記指標部は、バスバー表面に凹設された溝状をなす、請求項２又は請求項３に記載のバスバー。 The bus bar according to claim 2 or 3, wherein the index unit has a groove shape recessed in the surface of the bus bar. 前記接続部は、前記接続対象にレーザー溶接されるレーザー溶接部である、請求項１から請求項４のいずれか１項に記載のバスバー。 The bus bar according to any one of claims 1 to 4, wherein the connecting portion is a laser welding portion that is laser welded to the connection target.
JP2020012566A 2020-01-29 2020-01-29 Bus bar Pending JP2021118154A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2020012566A JP2021118154A (en) 2020-01-29 2020-01-29 Bus bar
PCT/JP2021/002164 WO2021153436A1 (en) 2020-01-29 2021-01-22 Bus bar

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WO2023090033A1 (en) * 2021-11-17 2023-05-25 矢崎総業株式会社 Bus bar, connection structure for bus bar and circuit board, and method for connecting bus bar and circuit board

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JPS55121289A (en) * 1979-03-12 1980-09-18 Sumitomo Electric Industries Method of welding cable conductor
JPH063718U (en) * 1991-01-30 1994-01-18 ダイハツ工業株式会社 Fuel tank pipe mounting structure
JPH0750353A (en) * 1993-08-04 1995-02-21 Sony Corp Optical functional element
JPH07182605A (en) * 1993-12-22 1995-07-21 Sony Corp Magnetic head apparatus
JP5633045B2 (en) * 2012-05-25 2014-12-03 Ｄｏｗａエレクトロニクス株式会社 Silver powder and method for producing the same
EP3539683B1 (en) * 2016-11-08 2023-12-20 Nippon Steel Corporation Apparatus for and method of welding monitoring
JP6874555B2 (en) * 2017-06-16 2021-05-19 株式会社オートネットワーク技術研究所 Busbar and wiring module with the busbar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023090033A1 (en) * 2021-11-17 2023-05-25 矢崎総業株式会社 Bus bar, connection structure for bus bar and circuit board, and method for connecting bus bar and circuit board

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