WO2006090511A1 - Procede de fabrication d’un ensemble pour dispositif electrique - Google Patents

Procede de fabrication d’un ensemble pour dispositif electrique Download PDF

Info

Publication number
WO2006090511A1
WO2006090511A1 PCT/JP2005/020260 JP2005020260W WO2006090511A1 WO 2006090511 A1 WO2006090511 A1 WO 2006090511A1 JP 2005020260 W JP2005020260 W JP 2005020260W WO 2006090511 A1 WO2006090511 A1 WO 2006090511A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode tabs
welding
manufacturing
electrode
bus bar
Prior art date
Application number
PCT/JP2005/020260
Other languages
English (en)
Japanese (ja)
Inventor
Takeshi Kanai
Naoji Warishita
Original Assignee
Nec Corporation
Fuji Jukogyo Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Corporation, Fuji Jukogyo Kabushiki Kaisha filed Critical Nec Corporation
Priority to JP2007504627A priority Critical patent/JP5197001B2/ja
Publication of WO2006090511A1 publication Critical patent/WO2006090511A1/fr

Links

Classifications

    • 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
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/505—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising a single busbar
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/557—Plate-shaped terminals
    • 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
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • 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

  • the present invention relates to a method for manufacturing an electrical device assembly in which a plurality of electrical devices (for example, batteries and capacitors) having electrical device elements that store and output electrical energy are assembled.
  • the present invention relates to a method of manufacturing an electric device assembly in which electrode tabs drawn out from the electric device caps are connected by welding.
  • the assembled battery 150 is a collection of a plurality of battery cells 120 (only two are shown in FIG. 1), and the electrode tabs 125a and 125b drawn from each battery cell 120 are electrically connected to each other! Speak.
  • the electrode tabs 125a and 125bi are all metallic materials, and the thickness thereof is relatively thin, for example, about 50 m to 300 m.
  • Japanese Unexamined Patent Publication No. 2003-338275 discloses that the electrode tabs 125a and 125b are bonded to each other using, for example, ultrasonic welding or laser welding in the above-described configuration. This document also discloses that the electrode tab and the bus bar are electrically connected.
  • the bus bar is a long plate-shaped member made of a conductive metal material.
  • One method of using the bus bar is to electrically connect the electrode tabs of the battery cells arranged away from each other, for example. To connect to.
  • the posture as shown in FIG. 1, that is, the electrode tabs 125a, 125b are in the horizontal direction.
  • the following problems may occur. That is, for example, when a laser is irradiated from the upper surface side to the electrode tab 125a, there is a possibility that the molten member may be pulled out vertically depending on the irradiation intensity of the laser. When the member is detached, the joint strength at the joint between the electrode tabs is lowered, and the reliability of the electrical connection is also lowered.
  • the electrode tabs 125a and 125b also have a thin member force, it is considered that such a problem of member removal is relatively likely to occur.
  • the above problems are not limited to batteries, and when manufacturing an electrical device assembly that requires electrode tabs to be joined together. It is a problem that can occur in common. In other words, for example, even in an electrical device that contains an electrical device element such as a capacitor inside, the above-described problems may occur when the electrode tabs drawn out from the electrical device are joined together. .
  • the present invention has been made in view of the above-described problems, and the purpose of the present invention is to cause electrode tab members to come off when the electrode tabs drawn from the electrical device are welded together. It is an object of the present invention to provide a method for manufacturing an electric device assembly that can perform electrical connection between nug electrode tabs with high reliability.
  • the method of manufacturing an electrical device assembly of the present invention includes connecting the electrode tabs drawn from each electrical device, so that the plurality of electrical devices are connected in series and Z or A method of manufacturing an electrical device assembly electrically connected in parallel, in which the electrode tabs that are connected to each other are partially overlapped with each other, and the tips of the overlapped electrode tabs are! / The position is such that the displacement is directed vertically upward, and the electrode tabs are partially melted and welded together from the tip side of the electrode tabs.
  • each electrode tab melts in a direction from the upper side to the lower side of the overlapping portion of the electrode tabs.
  • the problem of missing members is less likely to occur.
  • Various welding methods can be used.
  • the tip of the electrode tab may be irradiated with an energy beam to melt the electrode tab.
  • the present invention is not limited to welding between electrode tabs, and electrode tabs that are further overlapped with a bus bar may be welded together. That is, the step of partially superimposing the electrode tabs includes superimposing a bus bar made of a conductive material in close contact with one surface of the overlapping portion of the electrode tabs, In the step of welding the tabs, the electrode tabs and the bus bar are joined by irradiating each electrode tab and the bus bar (or only one of these members) with an energy beam. May be included. In this case, the welding may be performed in a state where the overlapping portion between the electrode tabs is pressed through a bus bar.
  • the step of partially overlapping the electrode tabs may include overlapping the electrode tabs with the tips of the electrode tabs aligned.
  • the electrode tabs are welded together by welding from the distal end side of the electrode tabs in a posture extending in the vertical direction.
  • the electrode tabs can be electrically connected with high reliability.
  • FIG. 1 is a plan view showing an example of a configuration of a conventional assembled battery.
  • FIG. 2 is a plan view showing a configuration of an assembled battery which is an embodiment of the electric device assembly manufactured by the manufacturing method of the present invention.
  • FIG. 3 is a perspective view showing the battery cell of FIG. 2 in a single state.
  • FIG. 4 is a perspective view showing an electrical connection portion between electrode tabs.
  • FIG. 5 is a partially enlarged view showing an enlarged electrical connection between electrode tabs.
  • FIG. 2 is a diagram showing a configuration of an assembled battery manufactured by the manufacturing method of the present invention.
  • FIG. 3 is a perspective view showing the battery cell of FIG. 2 in a single state.
  • FIG. 4 is a perspective view showing the electrical connection between the electrode tabs.
  • the battery cell 20 alone has an exterior film 24 that forms a sealed space inside, and a predetermined electromotive force (eg, 3.6 V) is contained in the sealed space.
  • a predetermined electromotive force eg, 3.6 V
  • the exterior film 24 has a structure in which two films are laminated, and a sealing portion 23 in which the films are heat-sealed is formed on the entire outer periphery of the exterior film 24.
  • the exterior film 24 has a rectangular outline shape, and a positive electrode tab 25a and a negative electrode tab 25b are drawn out from two sides on the short side. Note that the electrode tabs 25a and 25b are not particularly limited in the lead-out position. In addition to the form shown in FIG. 3, one side force is also drawn from the positive and negative electrode tabs. There may be.
  • the battery element 22 a plurality of sheet-like positive electrodes whose surfaces are coated with a positive electrode active material and sheet-like negative electrodes whose surfaces are coated with a negative electrode active material are laminated via a separator. It is a thing.
  • the thickness of the battery element 22 is, for example, about several tens of millimeters for several millimeters of force.
  • the exterior film 24 is not particularly limited, but, for example, an inner surface layer having heat sealability, an intermediate layer made of a metal foil film, and an outer surface layer functioning as a protective layer are sequentially stacked. It may have a three-layer structure.
  • the inner surface layer may be made of a thermoplastic resin excellent in electric field liquid resistance and heat sealing properties, such as polyethylene, polypropylene, polyethylene terephthalate (PET), polyamide, ionomer, and the like.
  • PET polyethylene terephthalate
  • polyamide polyamide
  • ionomer ionomer
  • the outer surface layer may be made of a thermoplastic resin having excellent insulating properties, such as polyamide-based resin or polyester-based resin.
  • Each of the electrode tabs 25a and 25b is a sheet-like member having a thickness of 50 ⁇ m to 300 ⁇ m, for example, and has flexibility.
  • the material of the electrode tab 25a for the positive electrode is, for example, aluminum or aluminum alloy.
  • the material of the electrode tab 25b for the negative electrode is, for example, copper or an alloy.
  • the battery cells 20 are electrically connected so as to be connected in series. That is, a plurality of battery cells 20 are stacked in a state where the electrode tab 25a of one battery cell 20 and the electrode tab 25b of the other battery cell 20 adjacent to each other face each other.
  • the number of battery cells 20 is not particularly limited, but may be 12, for example.
  • the electromotive force of one battery cell 20 is 3.6V, and when 12 of these are assembled, the final output is about 43V. In this way, when the output is about 50V, even if the operator accidentally touches the electrode tab or the like when handling the assembled battery, the influence on the human body is relatively small. In the end, the output that can be obtained is 50V or less.
  • a plate-like bus bar 31 made of a conductive material (metal material) is further arranged at the electrical connection portion between the electrode tabs 25a and 25b.
  • the bus bar 31 is in close contact with the overlapping portion 26 of the electrode tabs 25a and 25b as shown in FIG. 5, so that the bus bar 31 itself is also energized.
  • the bus bar 31 can be used as various powers, for example, as a terminal for voltage extraction.
  • a bus bar 31 is disposed for each electrical connection between the electrode tabs as in the present embodiment.
  • a predetermined electric circuit can be connected to each of the bus bars 31, and the voltage for each battery cell 20 can be detected.
  • each bus bar 31 can be provided with a fuse. If a fuse is provided for each bus bar 31, in other words, for each battery cell 20, even if one battery cell 20 malfunctions, only the fuse corresponding to that battery cell 20 is blown. The entire circuit Body damage is avoided.
  • bus bar 31 As another method of using the bus bar 31, as shown by a broken line in FIG. 4, when another battery cell group is arranged adjacent to the X direction in the drawing, a longer bus bar 31 is used. It is also possible to connect the electrode tabs of one battery cell group and the electrode tabs of the other battery cell group to each other.
  • the nose bar 31 has through holes 31a formed at both ends thereof. Such a through hole 31a can be used to fix the bus bar 31 to another member. Further, when a predetermined electric circuit is connected to the bus bar 31 as described above, the connection member forming one end of the electric circuit and the bus bar 31 are fastened together using the through hole 3 la. An electrical connection between the bus bar and the electrical circuit can also be made.
  • the electrode tabs 25a and 25b arranged in a state of being opposed to each other are partially overlapped so that the respective tips are directed vertically upward. In this state, the overlapping portion 26 between the electrode tabs extends in the vertical direction.
  • the electrode tabs 25a, 25b and the bus bar 31 are maintained in close contact with each other by sandwiching the electrode tabs 25a, 25b and the bus bar 31 from both sides with a pressing jig (not shown).
  • the nose bar 31 is a plate-like member, so that it is uniform with respect to the overlapping portion 26 of the electrode tab. Is applied.
  • the uniform pressure applied to the overlapping portion 26 means that the electrode tabs 25a and 25b are stably held.
  • the vertical upward force is also irradiated with an energy beam toward the tip ends of the electrode tabs 25a and 25b and the end face of the bus bar 31.
  • the electrode tabs 25a and 25b and the bus bar 31 are melted from the distal end side (the upper side in the drawing), and the members are joined together to perform welding.
  • the energy beam for example, a laser beam or an electron beam can be used. Also, as shown in FIG. 5, the tips of the electrode tabs 25a and 25b are in the same plane. If welding is performed in a state in which the electrode tabs are aligned, substantially the same amount of energy beam is irradiated to the electrode tabs 25a and 25b. If the tip positions of the electrode tabs 25a and 25b are not aligned, the amount of energy beam applied to the electrode tabs 25a and 25b may vary, and as a result, the amount of members to be melted may vary. . This can cause poor welding. Therefore, in order to improve the reliability of welding, it is preferable to align the tips of the electrode tabs as described above. From this point of view, welding may be performed by aligning the tips of the electrode tabs 25a and 25b and the end surface of the upper side of the bus bar 31.
  • each member of the electrode tabs 25a, 25b and the bus bar 31 is melted in the direction from the upper side to the lower side of the overlapping portion 26.
  • the problem of missing members during welding does not occur.
  • in the method of welding by irradiating the energy tabs on the electrode tabs 125a and 125b stacked in the horizontal direction for example, if the irradiation intensity of the energy beam is too strong, a large amount of parts are melted. As a result, there was a risk that the member would come off.
  • the force used to weld the electrode tabs 25a, 25b and the bus bar 31 can also be applied to the case where the electrode tabs 25a, 25b are simply welded together. It is also possible to weld three or more electrode tabs.
  • the main feature of the manufacturing method of the present embodiment is that the electrode tabs 25a and 25b have their tips facing directly above the lead. In other words, the overlapping portion 26 extends in the vertical direction. It is to perform welding in such a posture. Therefore, naturally, for example, after the electrode tabs are superposed in a horizontal posture, welding can be performed in the above posture.
  • the member is melted from the front end side of the electrode tabs 25a, 25b, etc. As long as it can be used, it is not limited to driving the energy beam vertically downward as shown in FIG.
  • the electrode tabs 25a and 25b are not limited to those using an energy beam as long as the tip side force is also melted.
  • an ultrasonic wave is used.
  • Other welding methods may be used.
  • the electrical connection between the battery cells 20 is not limited to a series connection, and may be a parallel connection or a combination of parallel and series.
  • the present invention provides electrode tabs drawn from electrical device elements such as capacitors. It can utilize suitably also for joining.
  • the electric device element may be an electric double layer capacitor or an electrolytic capacitor.
  • the member that accommodates the battery element 22 is not limited to the exterior film 24, and may be a rigid member such as a can.
  • the battery element 22 has a positive electrode and a negative electrode in the form of a band via a separator. It may be a wound type that is thinned by laminating and winding it and then compressing it into a flat shape.
  • the battery element 22 may be, for example, a lithium ion secondary battery, a nickel metal hydride battery, a nickel-powered battery, a lithium metal secondary Z secondary battery, or a lithium polymer battery.

Landscapes

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

Abstract

L’invention concerne un procédé de fabrication d’un bloc de batterie rendant difficile le retrait d’une patte d’électrode lors du soudage de pattes d’électrodes issues de cellules de batterie, et permettant de connecter les pattes d’électrode entre elles de manière très fiable. Selon l’invention, une cellule de batterie (20) constituant le bloc de batterie possède des pattes d’électrode (25a, 25b) pour des électrodes positive et négative issues de la partie scellée d’une couche d’enrobage. Les pattes d’électrode (25a, 25b) se chevauchent partiellement et les extrémités avant sont dirigées verticalement vers le haut. Dans l’état chevauchant, les pattes d’électrode (25a, 25b) font l’objet d’une fusion partielle du côté des extrémités avant, de façon à les souder l’une à l’autre.
PCT/JP2005/020260 2005-02-22 2005-11-04 Procede de fabrication d’un ensemble pour dispositif electrique WO2006090511A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007504627A JP5197001B2 (ja) 2005-02-22 2005-11-04 電気デバイス集合体の製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2005045410 2005-02-22
JP2005-045410 2005-02-22

Publications (1)

Publication Number Publication Date
WO2006090511A1 true WO2006090511A1 (fr) 2006-08-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2005/020260 WO2006090511A1 (fr) 2005-02-22 2005-11-04 Procede de fabrication d’un ensemble pour dispositif electrique

Country Status (2)

Country Link
JP (1) JP5197001B2 (fr)
WO (1) WO2006090511A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012148100A3 (fr) * 2011-04-26 2012-12-20 주식회사 엘지화학 Nouvelle structure de barre omnibus, et module de batterie la comprenant
KR101271565B1 (ko) * 2010-08-25 2014-03-04 주식회사 엘지화학 전지모듈 및 전지셀의 셀 단자들의 연결 방법
CN104115309A (zh) * 2012-05-08 2014-10-22 株式会社Lg化学 电极引线和具有电极引线的二次电池
US20140370366A1 (en) * 2013-06-18 2014-12-18 Denso Corporation Structure of battery unit
CN104241585A (zh) * 2013-06-18 2014-12-24 株式会社电装 电池单元的改进结构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017158268A (ja) * 2016-02-29 2017-09-07 三洋電機株式会社 電源システム
KR102324264B1 (ko) 2018-12-21 2021-11-08 주식회사 엘지에너지솔루션 전극 리드를 버스바에 밀착시키는 가압 지그 장치 및 이를 포함하는 배터리 모듈 제조 시스템
CN112002868B (zh) * 2020-09-08 2021-07-20 宁德新能源科技有限公司 一种电化学装置及电子装置

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JPS5545539A (en) * 1978-09-27 1980-03-31 Hitachi Ltd Welding method of edge joint
JPS62234680A (ja) * 1986-04-02 1987-10-14 Kobe Steel Ltd 厚板の立向姿勢電子ビ−ム溶接方法
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Cited By (16)

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Publication number Priority date Publication date Assignee Title
US9005799B2 (en) 2010-08-25 2015-04-14 Lg Chem, Ltd. Battery module and methods for bonding cell terminals of battery cells together
KR101271565B1 (ko) * 2010-08-25 2014-03-04 주식회사 엘지화학 전지모듈 및 전지셀의 셀 단자들의 연결 방법
US20130330595A1 (en) * 2011-04-26 2013-12-12 Lg Chem, Ltd Bus bar having novel structure and battery module including the same
CN103460448A (zh) * 2011-04-26 2013-12-18 株式会社Lg化学 具有新颖结构的汇流条和包括该汇流条的电池模块
JP2014514715A (ja) * 2011-04-26 2014-06-19 エルジー ケム． エルティーディ． 新規な構造のバスバー及びこれを備えた電池モジュール
JP2016048685A (ja) * 2011-04-26 2016-04-07 エルジー ケム． エルティーディ． 新規な構造のバスバー及びこれを備えた電池モジュール
US9136521B2 (en) 2011-04-26 2015-09-15 Lg Chem, Ltd. Bus bar having novel structure and battery module including the same
WO2012148100A3 (fr) * 2011-04-26 2012-12-20 주식회사 엘지화학 Nouvelle structure de barre omnibus, et module de batterie la comprenant
JP2015513205A (ja) * 2012-05-08 2015-04-30 エルジー・ケム・リミテッド 電極リード及びそれを含む二次電池
US9269960B2 (en) 2012-05-08 2016-02-23 Lg Chem, Ltd. Electrode lead and secondary battery having the same
CN104115309A (zh) * 2012-05-08 2014-10-22 株式会社Lg化学 电极引线和具有电极引线的二次电池
JP2015002141A (ja) * 2013-06-18 2015-01-05 株式会社デンソー 電池ユニット
JP2015002140A (ja) * 2013-06-18 2015-01-05 株式会社デンソー 電池ユニット
CN104241585A (zh) * 2013-06-18 2014-12-24 株式会社电装 电池单元的改进结构
CN104241691A (zh) * 2013-06-18 2014-12-24 株式会社电装 电池部件的改进结构
US20140370366A1 (en) * 2013-06-18 2014-12-18 Denso Corporation Structure of battery unit

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JP5197001B2 (ja) 2013-05-15

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