JP2009087735A - Device for making connections between terminals - Google Patents

Device for making connections between terminals Download PDF

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Publication number
JP2009087735A
JP2009087735A JP2007256196A JP2007256196A JP2009087735A JP 2009087735 A JP2009087735 A JP 2009087735A JP 2007256196 A JP2007256196 A JP 2007256196A JP 2007256196 A JP2007256196 A JP 2007256196A JP 2009087735 A JP2009087735 A JP 2009087735A
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Prior art keywords
terminal
sides
welded
connection
connection hole
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Inventor
Yoshinobu Makino
吉延 牧野
Katsunori Shiihara
克典 椎原
Takeo Kakuchi
武夫 覚地
Eiko Muro
永晃 室
Shinichiro Kosugi
伸一郎 小杉
Takashi Ekusa
俊 江草
Tsutomu Kanetsuna
務 金綱
Yoshiaki Asami
義明 阿左美
Tsutomu Matsui
勉 松井
Norihito Togashi
法仁 冨樫
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Toshiba Corp
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Toshiba Corp
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Priority to JP2007256196A priority Critical patent/JP2009087735A/en
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    • 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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  • Connection Of Batteries Or Terminals (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for making connections between terminals that are high in mechanical strength and excellent in assembly workability. <P>SOLUTION: The device for making connections between terminals connects a plurality of terminals 12 by each connecting bar 13. The connecting bar is provided with each connecting hole 14 that has a shape similar to the cross-section of the terminal 12 and is fitted with the outer periphery of the terminal. The connecting hole is formed into a polygonal shape having linear inner sides. At least two sides, facing each other, of the inner sides are welded with the terminal 12 side. Each recessed part 15 having a prescribed curvature is formed near each corner part of the inner sides other than the at least two sides to be welded. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、例えば、複数の電池用セルの端子間等を相互に接続する端子間接続装置に関する。   The present invention relates to an inter-terminal connection device that interconnects terminals of a plurality of battery cells, for example.

近年、電池の性能が向上し、小形で高出力が得られるようになってきたため、各種の電源装置として利用されるようになってきた。例えば、自動車や自転車に搭載して、所望の電力を供給する小形で高性能の電源装置が考えられ、そのための提案も多くみられる（例えば、特許文献１参照）。このような電源装置では、電力供給対象機器を駆動可能なレベルの電圧、及び長時間の使用を可能とする容量を得るため、複数個の電池セルを接続して電源装置を構成している。そこで、複数の電池セルにそれぞれ設けられた出力用端子を相互に接続する端子間接続装置が必要となる。
特許第３３５０１８９号公報 In recent years, the performance of batteries has been improved, and a small size and high output can be obtained. Therefore, the batteries have been used as various power supply devices. For example, a small and high-performance power supply device that can be mounted on an automobile or a bicycle and supplies desired power is conceivable, and many proposals therefor have been found (for example, see Patent Document 1). In such a power supply device, a plurality of battery cells are connected to form a power supply device in order to obtain a voltage at a level capable of driving the power supply target device and a capacity that enables long-time use. Therefore, an inter-terminal connection device that connects output terminals provided to each of the plurality of battery cells is required.
Japanese Patent No. 3350189

この種の電源装置に要求されることは、使用環境により激しい振動を受ける場合があるので機械的強度が充分であることが重要である。また、端子および接続バーともに比較的小形な部品であることから、狭い作業空間での精密な作業を要するので、組み立て作業性が優れていることが望まれる。   What is required for this type of power supply device is that sufficient mechanical strength is important since it may be subject to severe vibration depending on the usage environment. Further, since both the terminal and the connection bar are relatively small parts, precise work in a narrow work space is required, and therefore, it is desirable that the assembly workability is excellent.

本発明の目的は、機械的強度が高く、組み立て作業性に優れた端子間接続装置を提供することにある。   An object of the present invention is to provide an inter-terminal connection device having high mechanical strength and excellent assembly workability.

本発明の端子間接続装置は、複数の端子間を接続バーにより接続する端子間接続装置であって、前記端子の横断面と相似な形状で、前記端子の外周が嵌合する接続孔が、直線状の内辺を有する多角形であり、その相対する少なくとも２辺が前記端子側と溶接され、この溶接される前記少なくとも２辺以外の内辺の角部近傍に、所定の曲率を有する凹部が形成されていることを特徴とする。   The inter-terminal connection device of the present invention is an inter-terminal connection device that connects a plurality of terminals with a connection bar, and has a shape similar to the cross section of the terminal, and a connection hole into which the outer periphery of the terminal is fitted, A recess having a predetermined curvature in the vicinity of a corner of an inner side other than the at least two sides to be welded. Is formed.

本発明では、接続孔が方形の場合、端子側と溶接されない２辺のどちらかは、前記端子の外面に接しない寸法形状に設定されている。   In the present invention, when the connection hole is square, one of the two sides that are not welded to the terminal side is set to a dimension that does not contact the outer surface of the terminal.

また、本発明では、前記凹部の曲率半径は、凹部が形成される内辺の長さの２５％未満とし、この凹部が形成される内辺の、凹部以外の部分に直線部が残存するように設定している。   Further, in the present invention, the radius of curvature of the concave portion is less than 25% of the length of the inner side where the concave portion is formed, and the linear portion remains in the portion other than the concave portion of the inner side where the concave portion is formed. Is set.

また、本発明では、接続孔内辺と端子側との少なくとも２辺の溶接部が平行である。   Moreover, in this invention, the welding part of at least 2 sides of a connection hole inner side and the terminal side is parallel.

さらに、本発明では、接続孔内辺の前記端子側との溶接部における板厚方向の溶け込み深さが、前記接続バーの板厚以上である。   Furthermore, in this invention, the penetration depth of the thickness direction in the welding part with the said terminal side of the connection hole inner side is more than the plate thickness of the said connection bar.

本発明によれば、端子と接続バーに形成された接続孔との嵌合が比較的容易で、溶接により十分な強度を得ることができ、振動等にも十分に耐えることができる。   According to the present invention, it is relatively easy to fit the terminal and the connection hole formed in the connection bar, sufficient strength can be obtained by welding, and vibration and the like can be sufficiently resisted.

以下、本発明にかかる端子間接続装置の一実施の形態について、図面を用いて詳細に説明する。   Hereinafter, an embodiment of an inter-terminal connection device according to the present invention will be described in detail with reference to the drawings.

図１（ａ）（ｂ）は、本発明を、複数の電池セルを集合させて相互に接続して成る電源装置に適用した場合を示している。   FIGS. 1A and 1B show a case where the present invention is applied to a power supply device in which a plurality of battery cells are assembled and connected to each other.

図１において、１１は電池セル（以下、単にセルと呼ぶ）であり、このセル１１の上面には角柱状の端子１２が設けられている。これらセル１１は所定の出力電圧及び出力容量を得るため複数個用意され配列されている。１３は接続バーであり、この接続バー１３には端子１２に対する接続孔１４が設けられている。この接続バー１３により、端子１２を介して複数のセル１１が相互に接続される。接続孔１４は端子１２の横断面形状（図の例では長方形）と相似な形状で、図示のように、端子１２の外周が嵌合する直線状の内辺を有する。   In FIG. 1, reference numeral 11 denotes a battery cell (hereinafter simply referred to as a cell), and a prismatic terminal 12 is provided on the upper surface of the cell 11. A plurality of these cells 11 are prepared and arranged in order to obtain a predetermined output voltage and output capacity. A connection bar 13 is provided with a connection hole 14 for the terminal 12. A plurality of cells 11 are connected to each other via the terminals 12 by the connection bar 13. The connection hole 14 has a shape similar to the cross-sectional shape of the terminal 12 (rectangular in the example shown in the figure), and has a linear inner side with which the outer periphery of the terminal 12 fits as shown in the figure.

図２（ａ）（ｂ）は、接続バー１３の接続孔１４と端子１２との接続部分を拡大して示している。   FIGS. 2A and 2B show an enlarged connection portion between the connection hole 14 of the connection bar 13 and the terminal 12.

図２において、平面が長方形を成す接続孔１４の４辺１４ａ，１４ｂ，１４ｃ，１４ｄ、のうち、その相対する少なくとも２辺１４ｂ、１４ｄは端子１２側と溶接される。この２辺１４ｂ，１４ｄは端子１２と溶接されることから、端子１２の外面に密着するように２辺１４ｂ，１４ｄの対向間隔は厳しく寸法管理されている。これに対し他の２辺１４ａ，１４ｃは、端子１２側に溶接しない。このため、その２辺１４ａ，１４ｃの対向間隔の寸法は比較的余裕を持たせてある。この余裕の程度は、端子１２との嵌合組み立て後、２辺１４ａ，１４ｃのどちらかが、端子１２の外面に接しない寸法関係とする。これは、端子１２との嵌合組み立ての際、端子１２を接続孔１４内に容易に嵌め込むためである。   In FIG. 2, among the four sides 14a, 14b, 14c, and 14d of the connection hole 14 having a rectangular plane, at least two opposite sides 14b and 14d are welded to the terminal 12 side. Since the two sides 14b and 14d are welded to the terminal 12, the opposing distance between the two sides 14b and 14d is strictly controlled so as to be in close contact with the outer surface of the terminal 12. On the other hand, the other two sides 14a and 14c are not welded to the terminal 12 side. For this reason, the dimension of the facing interval between the two sides 14a and 14c has a relatively large margin. The margin is a dimensional relationship in which one of the two sides 14 a and 14 c does not contact the outer surface of the terminal 12 after being assembled with the terminal 12. This is because the terminal 12 is easily fitted into the connection hole 14 during the fitting assembly with the terminal 12.

また、この２辺１４ａ，１４ｃの角部近傍には、所定の曲率を有する凹部１５を形成している。これらの凹部１５は、端子１２と溶接される２辺１４ｂ，１４ｄの対向間隔調整を比較的容易にするために機能する。すなわち、前述のように、２辺１４ｂ、１４ｄは端子１２側と溶接されるため、端子１２の外面に密着するように、その２辺１４ｂ，１４ｄの対向間隔寸法は厳しく管理されている。このため、そのままでは、端子１２を接続孔１４内に嵌め込むことが難しい。しかし、２辺１４ａ，１４ｃの角部近傍に所定の曲率を有する凹部１５を形成したので、２辺１４ｂ，１４ｄ間に外力を加えることにより、比較的容易にその対向間隔を調整することができる。すなわち、端子１２を嵌め入れるときは２辺１４ｂ，１４ｄ間を心持ち広げ、端子１２が接続孔１４内に嵌め込み易くする。また、端子１２が接続孔１４内に挿入された後は、２辺１４ｂ，１４ｄ間を狭める方向に外力を加えることにより、端子１２の外面との間は密着し、その後の溶接を良好な状態で行うことができる。   A recess 15 having a predetermined curvature is formed in the vicinity of the corners of the two sides 14a and 14c. These concave portions 15 function to relatively easily adjust the facing distance between the two sides 14 b and 14 d welded to the terminal 12. That is, as described above, since the two sides 14b and 14d are welded to the terminal 12 side, the facing distance between the two sides 14b and 14d is strictly controlled so as to be in close contact with the outer surface of the terminal 12. For this reason, it is difficult to fit the terminal 12 into the connection hole 14 as it is. However, since the concave portion 15 having a predetermined curvature is formed in the vicinity of the corners of the two sides 14a and 14c, the facing distance can be adjusted relatively easily by applying an external force between the two sides 14b and 14d. . That is, when the terminal 12 is fitted, the space between the two sides 14b and 14d is widened so that the terminal 12 can be easily fitted into the connection hole 14. In addition, after the terminal 12 is inserted into the connection hole 14, an external force is applied in a direction to narrow the space between the two sides 14b and 14d so that the terminal 12 is in close contact with the outer surface of the terminal 12, and the subsequent welding is in good condition. Can be done.

このように、接続孔１４の４つの内辺１４ａ，１４ｂ，１４ｃ，１４ｄ、のうち、端子１２側と溶接されない２辺１４ａ，１４ｃ間の寸法は、そのどちらかが、端子１２の外面に接しない程度に比較的余裕を持たせており、また、端子１２側と溶接される２辺１４ｂ，１４ｄは、他の２辺１４ａ，１４ｃの角部近傍に形成された所定の曲率を有する凹部１５の存在により、その対向間隔を比較的容易に調整することができる。したがって、端子１２との嵌合組み立ての際、組み立て作業が容易となり、しかも、端子１２と接続バー１３のとの溶接部における隙間を抑制することができる。すなわち、端子１２外形寸法と接続バー１３の接続孔１４の寸法公差に裕度を持たせ、かつ、溶接突合せ開先のギャップを抑制することができ、健全な溶接部を形成することができる。   Thus, of the four inner sides 14a, 14b, 14c, and 14d of the connection hole 14, the dimension between the two sides 14a and 14c that are not welded to the terminal 12 side is in contact with the outer surface of the terminal 12. The two sides 14b and 14d to be welded to the terminal 12 side are provided with a relatively large margin, and the recess 15 having a predetermined curvature formed in the vicinity of the corners of the other two sides 14a and 14c. Due to the presence of, the distance between the facings can be adjusted relatively easily. Therefore, when fitting and assembling with the terminal 12, the assembling work is facilitated, and a gap in the welded portion between the terminal 12 and the connection bar 13 can be suppressed. That is, a tolerance can be given to the dimensional tolerance of the external dimensions of the terminal 12 and the connection hole 14 of the connection bar 13, and the gap of the welding butt groove can be suppressed, and a sound welded portion can be formed.

ここで、凹部１５の曲率半径は、凹部１５が形成される内辺１４ａ，１４ｃの長さの２５％未満とする。すなわち、この凹部１５が形成される内辺１４ａ，１４ｃに、凹部以外の直線部が残存するように寸法設定する。例えば、内辺１４ａには、その両角部近傍に凹部１５がそれぞれ形成されており、その凹部１５の曲率半径を内辺１４ａの長さの２０％とした場合、２つの凹部１５の開口辺長さを合わせると、内辺１４ａの長さの８０％となり、残りの２０％が２つの凹部１５間の直線部長さとなる。   Here, the radius of curvature of the recess 15 is less than 25% of the length of the inner sides 14a and 14c where the recess 15 is formed. That is, the dimensions are set so that the straight portions other than the recess remain on the inner sides 14a and 14c where the recess 15 is formed. For example, when the inner side 14a is formed with recesses 15 in the vicinity of both corners, and the radius of curvature of the recess 15 is 20% of the length of the inner side 14a, the opening side length of the two recesses 15 is set. Together, the length is 80% of the length of the inner side 14a, and the remaining 20% is the straight portion length between the two recesses 15.

これらの寸法は、接続バー１３の材質、接続孔１４の大きさなどにより適宜に設定すればよい。   These dimensions may be appropriately set depending on the material of the connection bar 13 and the size of the connection hole 14.

このように凹部１５の曲率半径を設定することにより、溶接しない内辺１４ａ，１４ｃには、両端の凹部１５とその間の直線状の辺部とがそれぞれ形成される。このため、溶接される内辺１４ｂ，１４ｄの対向間隔は、凹部１５の存在により調整することが可能となり、組み立て作業性が改善されると共に良好な溶接部を得ることができる。   By setting the radius of curvature of the recess 15 in this manner, the inner sides 14a and 14c that are not welded are formed with the recess 15 at both ends and a linear side portion therebetween. For this reason, the facing distance between the inner sides 14b and 14d to be welded can be adjusted by the presence of the recess 15, so that the assembly workability is improved and a good welded portion can be obtained.

以下、これらの溶接作業について図３乃至図５を用いて説明する。図３は接続バー１３と端子１２との溶接作業を表しており、また、図４は接続バー１３と端子１２との溶接部を示している、さらに、図５は溶接部の断面形状を示している。   Hereinafter, these welding operations will be described with reference to FIGS. 3 to 5. 3 shows a welding operation between the connection bar 13 and the terminal 12, FIG. 4 shows a welded portion between the connection bar 13 and the terminal 12, and FIG. 5 shows a sectional shape of the welded portion. ing.

図３において、１７は溶接用のノズルで、このノズル１７からは溶接用のレーザ光１８が出力され、接続バー１３の、図２で示した２つの内辺１４ｂ，１４ｄに沿って移動し、端子１２の外面との間を溶接する。図４はこの溶接部１９を示している。この溶接部１９は図示のように平行に形成されており、端子１２と接続バー１３の接合強度を向上させることができる。   In FIG. 3, reference numeral 17 denotes a welding nozzle. A laser beam 18 for welding is output from the nozzle 17, and moves along the two inner sides 14 b and 14 d of the connection bar 13 shown in FIG. 2. The space between the outer surfaces of the terminals 12 is welded. FIG. 4 shows the welded portion 19. The welds 19 are formed in parallel as shown in the figure, and the joint strength between the terminals 12 and the connection bars 13 can be improved.

図４において、端子１２は肩部１２ａを有しており、接続バー１３は、その接続孔１４が端子１２の上部に嵌合するとともに、接続孔１４の周囲下面は端子１２の肩部１２ａ上に載置される。   In FIG. 4, the terminal 12 has a shoulder 12 a, and the connection bar 13 has a connection hole 14 fitted into the upper part of the terminal 12, and the lower peripheral surface of the connection hole 14 is above the shoulder 12 a of the terminal 12. Placed on.

ここで、接続孔１４の内辺と端子１２側との溶接部１９における板厚方向の溶け込み深さは、接続バー１３の板厚以上となるように設定する。例えば、接続バー１３の板厚が０．５ｍｍの場合、レーザ溶接条件は次のように設定する。   Here, the penetration depth in the thickness direction of the welded portion 19 between the inner side of the connection hole 14 and the terminal 12 is set to be equal to or greater than the thickness of the connection bar 13. For example, when the plate thickness of the connection bar 13 is 0.5 mm, the laser welding conditions are set as follows.

レーザ出力：４００W〜２０００W
溶接速度：１０００ｍｍ/分〜４０００ｍｍ/分
シールドガス流量：１０〜１００リットル/分
レーザ照射スポット径：０．０５ｍｍ〜０．３ｍｍ
レーザ入射角度：面直から±３０°
このように設定することにより、溶接部１９の溶け込み深さは、図４で示すように、接続バー１３の板厚以上にすることができ、端子の肩部１２ａにも溶け込んだ溶接状態とすることができる。このような溶接状態とすることにより、一層強固で安定した接続状態が得られ、強い継続した振動にも十分耐えることができる。 Laser output: 400W to 2000W
Welding speed: 1000 mm / min to 4000 mm / min Shielding gas flow rate: 10 to 100 l / min Laser irradiation spot diameter: 0.05 mm to 0.3 mm
Laser incident angle: ± 30 ° from the surface
By setting in this way, the penetration depth of the welded portion 19 can be equal to or greater than the plate thickness of the connection bar 13, as shown in FIG. 4, and the welded state is also melted into the shoulder portion 12a of the terminal. be able to. By adopting such a welded state, a stronger and more stable connection state can be obtained, and it can sufficiently withstand strong continuous vibration.

なお、上記実施の形態では、接続孔１４及びこれと嵌合する端子１２の断面形状を長方形としたが、もちろん正方形でもよく、さらにはこれら以外の多角形であってもよい。接続バー１３により端子１２を介して接続されるものとして電池セルを例示したが、もちろん電池以外の端子を有する電気機器であれば何でも適用することができる。   In the above embodiment, the cross-sectional shape of the connection hole 14 and the terminal 12 fitted to the connection hole 14 is rectangular, but of course, it may be square or may be other polygons. Although the battery cell is illustrated as being connected via the terminal 12 by the connection bar 13, of course, any electric device having a terminal other than the battery can be applied.

本発明を、複数の電池セルを有する電源装置に適用した場合を示しており、（ａ）は平面図、（ｂ）はその右側面図である。The case where this invention is applied to the power supply device which has a some battery cell is shown, (a) is a top view, (b) is the right view. 本発明による端子間接続装置の一実施の形態を、接続バーの接続孔と端子との接続部分について拡大して示しており、（ａ）は平面図、（ｂ）はその右側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged view of a connection portion between a connection hole of a connection bar and a terminal, showing an embodiment of an inter-terminal connection device according to the present invention, wherein FIG. . 上記一実施の形態における接続バーと端子との溶接作業を表す正面図である。It is a front view showing the welding operation | work with the connection bar and terminal in the said one Embodiment. 上記一実施の形態における接続バーと端子との溶接部を示す平面図である。It is a top view which shows the welding part of the connection bar and terminal in the said one Embodiment. 上記一実施の形態における接続バーと端子との溶接部の断面図である。It is sectional drawing of the welding part of the connection bar and terminal in the said one Embodiment.

符号の説明Explanation of symbols

１２ 端子
１３ 接続バー
１４ 接続孔
１５ 凹部
１９ 溶接部 12 terminal 13 connection bar 14 connection hole 15 recess 19 welded part

Claims (5)

複数の端子間を接続バーにより接続する端子間接続装置であって、
前記端子の横断面と相似な形状で、前記端子の外周が嵌合する接続孔が、直線状の内辺を有する多角形であり、その相対する少なくとも２辺が前記端子側と溶接され、
この溶接される前記少なくとも２辺以外の内辺の角部近傍に、所定の曲率を有する凹部が形成されている
ことを特徴とする端子間接続装置。 An inter-terminal connection device for connecting a plurality of terminals with a connection bar,
The connection hole in which the outer periphery of the terminal fits in a shape similar to the cross section of the terminal is a polygon having a linear inner side, and at least two opposite sides thereof are welded to the terminal side,
A recess having a predetermined curvature is formed in the vicinity of the corner of the inner side other than the at least two sides to be welded. 前記接続孔は方形であり、端子側と溶接されない２辺のどちらかは、前記端子の外面に接しない寸法形状に設定されていることを特徴とする請求項１に記載の端子間接続装置。   2. The inter-terminal connection device according to claim 1, wherein the connection hole has a square shape, and one of the two sides that are not welded to the terminal side is set to have a dimension that does not contact the outer surface of the terminal. 前記凹部の曲率半径は、凹部が形成される内辺の長さの２５％未満とし、この凹部が形成される内辺の、凹部以外の部分に直線部が残存するように設定したことを特徴とする請求項１に記載の端子間接続装置。   The radius of curvature of the concave portion is set to be less than 25% of the length of the inner side where the concave portion is formed, and is set so that the linear portion remains in a portion other than the concave portion of the inner side where the concave portion is formed. The inter-terminal connection device according to claim 1. 接続孔内辺と端子側との少なくとも２辺の溶接部が平行であることを特徴とする請求項１乃至請求項３のいずれかに記載の端子間接続装置。   4. The inter-terminal connection device according to claim 1, wherein at least two sides of the connection hole inner side and the terminal side are parallel to each other. 接続孔内辺の前記端子側との溶接部における板厚方向の溶け込み深さが、前記接続バーの板厚以上であることを特徴とする請求項１乃至請求項４のいずれかに記載の端子間接続装置。   The terminal according to any one of claims 1 to 4, wherein a penetration depth in a thickness direction in a welded portion of the inner side of the connection hole with the terminal side is equal to or greater than a thickness of the connection bar. Inter-connection device.
JP2007256196A 2007-09-28 2007-09-28 Device for making connections between terminals Pending JP2009087735A (en)

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JP2012160339A (en) * 2011-01-31 2012-08-23 Sanyo Electric Co Ltd Battery pack and battery connection method
US9553294B2 (en) 2011-12-16 2017-01-24 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device
JP2013145739A (en) * 2011-12-16 2013-07-25 Lithium Energy Japan:Kk Power storage device, manufacturing method of the same, and bus bar used for the same
US10741871B2 (en) 2011-12-16 2020-08-11 Gs Yuasa International Ltd. Electric storage device, manufacturing method of electric storage device, and bus bar used for electric storage device
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US11289773B2 (en) 2016-01-29 2022-03-29 Sanyo Electric Co., Ltd. Power supply device, vehicle using same, bus bar, and electrical connection method for battery cell using same bus bar
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