WO2013191480A1 - Procédé de soudage de languettes d'électrode - Google Patents

Procédé de soudage de languettes d'électrode Download PDF

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Publication number
WO2013191480A1
WO2013191480A1 PCT/KR2013/005430 KR2013005430W WO2013191480A1 WO 2013191480 A1 WO2013191480 A1 WO 2013191480A1 KR 2013005430 W KR2013005430 W KR 2013005430W WO 2013191480 A1 WO2013191480 A1 WO 2013191480A1
Authority
WO
WIPO (PCT)
Prior art keywords
welding
electrode tab
bending
electrode
electrode tabs
Prior art date
Application number
PCT/KR2013/005430
Other languages
English (en)
Korean (ko)
Inventor
김욱현
Original Assignee
에스케이이노베이션 주식회사
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 에스케이이노베이션 주식회사 filed Critical 에스케이이노베이션 주식회사
Publication of WO2013191480A1 publication Critical patent/WO2013191480A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • B23K26/24—Seam welding
    • B23K26/26—Seam welding of rectilinear seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/36—Electric or electronic devices
    • B23K2101/38—Conductors
    • 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
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side 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
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • 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 welding electrode tabs, and more particularly, to a method for welding taps with low productivity by eliminating electrode tab tolerances and distortions resulting from assembly of battery modules and assembly of additional parts.
  • a large capacity secondary battery is formed by connecting a plurality of high output secondary batteries in series so as to be used in a device requiring a large power for driving a motor such as an electric vehicle.
  • a large capacity secondary battery (hereinafter referred to as a battery cell) includes a plurality of battery cells connected in series or in parallel to form a battery module, and after the battery module structure is formed, a cell sensing line and other electronic devices and parts are assembled. To complete the battery module. At this time, the battery module is formed with an electrode tab for electrically connecting the plurality of battery cells, the plurality of battery cells are connected using a variety of methods such as clip, crimping, welding, bolting.
  • the welds of the electrode tabs are bent in the vertical direction of the battery cell and positioned to overlap each other, and then welding is performed in the direction perpendicular to the weld face of the electrode tabs.
  • a tolerance may occur in a process of connecting in series or parallel structure, and a defect may occur, and it is difficult to weld by additionally adding a cell sensing line and other components.
  • the laser spot size is only about 230 ⁇ m, the welding part must enter therein, so a large amount of defects are generated during the module assembly process, and productivity is greatly reduced, so precise bending is required.
  • the welding method is simple, easy to manufacture and development of a high productivity electrode tab welding method is required.
  • Korean Patent No. 0889767 has been disclosed.
  • the present invention has been made in order to solve the above problems, an object of the present invention, to prevent the occurrence of tolerances and distortion of the electrode tab due to battery module assembly and other parts assembly by lowering the defective rate of the electrode tab to improve productivity It is to provide a welding method.
  • the electrode tab welding method of the present invention in the electrode tab welding method of a battery module in which a plurality of battery cells in which electrode tabs are formed are connected to the electrode tabs, a welding surface in which the electrode tabs contact each other by bending the electrode tabs is formed. Forming a first bending step; and, after the first bending step, fixing the position of the welding surface by using a fixing means; and aligning the electrode tab after the electrode tab alignment step; A second bending step of re-bending the electrode tabs to coincide with the magnetic field of the surface; And a welding step of performing welding on the welding surface.
  • the electrode tab welding method may include a module assembly step of assembling a plurality of battery cells into a module after the first bending step.
  • the fixing means is a pressing means for pressing both sides of the welding surface in the center direction.
  • a center portion of the electrode tabs is bent into the space portion between the electrode tabs to form a welding surface, and end portions of the electrode tabs are bent outside the space portion between the electrode tabs.
  • the bending means may be a press having a triangular cross section, and may be a roller having a rectangular cross section.
  • the welding may be performed while the fixing unit is maintained, and laser welding may be performed.
  • Electrode tab welding method of the present invention by the configuration as described above is to perform the second bending step after forming the battery module, which can prevent the bending tolerance and distortion between the electrode tab caused by module assembly and other parts assembly It works.
  • the electrode tab welding method of the present invention because the welding is carried out while maintaining the fixing means used in the secondary bending step in the welding step, there is an effect that the welding can be made stably.
  • the electrode tab welding method of the present invention prevents bending tolerance and distortion of the electrode tab, and the welding is made stable, thereby reducing the defective rate and productivity can be improved, there is an effect that the operator's work can be facilitated.
  • FIG. 1 is a perspective view of a battery module welded by the electrode tab welding method of the present invention.
  • Figure 2 is a step of the electrode tab welding method according to an embodiment of the present invention.
  • FIG 3 is a front view showing the first bending step and the module assembly step of the electrode tab welding method according to an embodiment of the present invention.
  • Figure 4 is a front view showing the secondary bending step of the electrode tab welding method according to an embodiment of the present invention.
  • FIG. 5 is a front view showing a secondary bending step using the bending means of another embodiment of the electrode tab welding method according to an embodiment of the present invention.
  • FIG. 6 is a front view showing a welding step of the electrode tab welding method according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of a battery module 1000 welded by an electrode tab welding method according to an embodiment of the present invention
  • Figure 2 is a step showing each step of the electrode tab welding method according to an embodiment of the present invention 1 and 2 will be described in detail an electrode tab welding method according to an embodiment of the present invention.
  • Electrode tab welding method includes a primary bending step (S10), secondary bending step (S40), electrode tab alignment step (S30) and welding step (S50).
  • the battery module 1000 welded by the electrode tab welding method according to an embodiment of the present invention means that a plurality of batteries are connected.
  • the battery module 1000 includes two or more battery cells 110 and respective batteries. And a plurality of electrode tabs 110 extending from the cells 110 and welded to each other.
  • the battery module 1000 may have a series form in which the electrode tab 110 of the neighboring cathode and the electrode tab 110 of the anode are welded to each other, and the parallel form in which the neighboring electrode tabs 110 of the same polarity are welded. Can be.
  • the battery module 1000 welded by the tap welding method according to an embodiment of the present invention is in series, and the tap welding method according to the present invention may be applied regardless of the series and parallel forms, so that the productivity of the battery module 1000 is improved. There is an effect that can be improved.
  • FIG. 3 is a front view showing a first bending step (S10) and a module assembly step (S20) of the electrode tab welding method according to an embodiment of the present invention, with reference to Figure 3 electrode tab according to an embodiment of the present invention
  • the primary bending step S10 and the module assembly step S20 of the welding method will be described in detail.
  • the first bending step S10 is a step of bending the electrode tabs 110 extending from the respective battery cells 110.
  • the electrode tabs 110 In order for the plurality of battery cells 110 to form a module, the electrode tabs 110 should be connected to each other, and in order for the electrode tabs 110 to be connected to each other, it is necessary to bend the respective electrode tabs 110.
  • the electrode tabs 110 are bent to form a welding surface 111 for welding. That is, the electrode tabs 110 and the first bent surface 112 are formed so that the center portion is bent into the space portion between the electrode tabs 110 and inclined inside the space portion between the electrode tabs 110 and the electrode tab. Center portion of the 110
  • the welding surface 111 is formed to abut the center portion of the electrode tabs 110 and the end of the electrode tabs 110 on the upper side of the welding surface 111 is the space portion between the electrode tabs 110. It includes a second bent surface 113 is bent to the outside is formed obliquely. Therefore, the electrode tabs 110 include the first bent surface, the weld surface, and the second bent surface, so that welding is easy and impact absorbing action is also possible.
  • the battery module 1000 is formed by welding a plurality of battery cells 110 in a module form after the electrode tabs 110 are bent.
  • a module assembly step S20 is performed after the first bending step S10.
  • Module assembly step (S20) is a step of assembling a plurality of battery cells 110 in the form of a module, between the electrode tabs 110 bent in the first bending step (S10) while performing the module assembly step (S20). Tolerance may occur because the welding surface 111 does not exactly contact, and the electrode tabs 110 may be twisted.
  • the electrode tab welding method according to an embodiment of the present invention includes a secondary bending step (S40), there is an effect that can correct the tolerances and distortion generated in the module assembly step (S20).
  • FIG. 4 is a front view showing the electrode tab alignment step (S30) and the secondary bending step (S40) of the electrode tab welding method according to an embodiment of the present invention with reference to FIG. 4, according to an embodiment of the present invention
  • the electrode tab alignment step S30 and the secondary bending step S40 of the electrode tab welding method will be described in detail.
  • the electrode tab alignment step S30 corrects the position of the welding surface 111 using the fixing means 200 after the module assembly step S20.
  • the fixing means 200 may be a pressing means for pressing both sides of the welding surface 111 in the center direction, the jig may be used as the pressing means.
  • the fixing means 200 may be variously modified without departing from the object of the present invention for fixing the electrode tabs 110 or the squeezable jig in the electrode tab welding method according to the exemplary embodiment of the present invention.
  • Secondary bending step (S40) is performed after the electrode tab alignment step (S30), the step of re-bending the electrode tabs 110 of the battery module 1000 assembled in the module assembly step (S20), the fixing means ( 200) and bending means 300a.
  • the welding surfaces 111 of the battery module 1000 are compressed by the fixing means 200 to align the positions of the welding surfaces 111, to fix the electrode tabs 110, and to form the electrode tabs 110.
  • the electrode tabs 110 are bent again using the bending means 300a.
  • the bending means 300a of the electrode tab welding method may have a roller shape having a rectangular cross section.
  • the electrode tabs 110 in which the primary bending step S10 is performed have upper ends bent outward of the space between the electrode tabs 110 to form a triangle shape between the electrode tabs 110.
  • the space portion of is formed.
  • the secondary bending step S40 allows the bending means 300a to pass through the space portion formed between the electrode tabs 110 so that the edges of the welding surface 111 formed between the electrode tabs 110 coincide with each other. . That is, the secondary bending step S40 may have an effect of correcting the tolerance between the electrode tabs 110 generated in the module assembly step S20 and the twisting of the electrode tab 110.
  • the bending means (300a) of the electrode tab welding method is in the form of a roller having a rectangular cross section, the most ideal form for precise re bending of the electrode tab 110, the bending means (300a)
  • the cross section of the can be variously modified in a shape corresponding to the space formed between the electrode tabs 110, the shape can also be variously modified without departing from the object of the present invention as well as a roller shape.
  • FIG. 5 is a front view showing the secondary bending step (S40) using the bending means 300b of another embodiment of the electrode tab welding method according to an embodiment of the present invention, with reference to Figure 5, another embodiment of the present invention
  • the bending means 300b according to the example will be described in detail.
  • the main purpose of the bending means 300b is to correct the edge of the welded surface 111 that is misaligned or distorted in the module assembly step S20.
  • the shape of the bending means 300b is defined by the space between the electrode tabs 110 and It is preferably formed in a corresponding shape. Therefore, the bending means 300b according to another embodiment of the present invention is formed in a rod-shaped press shape having a triangular cross section.
  • FIG. 6 is a front view showing a welding step (S50) of the electrode tab welding method according to an embodiment of the present invention, with reference to Figure 6 welding step (S50) of the electrode tab welding method according to an embodiment of the present invention. It demonstrates in detail.
  • the welding step S50 is a step of welding the electrode tabs 110 by irradiating a laser to the welding surface 111 formed between the electrode tabs 110 after the second bending step S40. At this time, the welding is performed in a state of being maintained without removing the fixing means 200 which fixed the electrode tab 110 in the secondary bending step S40. Therefore, the electrode tab welding method according to an embodiment of the present invention can prevent the electrode tabs 110 from being displaced during the welding step S50, so that welding can be stably performed.
  • the welding step (S50) of the method of the electrode tab 110 according to an embodiment of the present invention can be variously modified without departing from the object of the present invention, such as laser welding, ultrasonic welding, or the like.
  • the secondary tab bending step S40 is performed, so that the electrode tab 110 is bent between the electrode tabs 110 generated by the module assembly and other component assembly. Tolerance and distortion can be prevented.
  • the electrode tab welding method of the present invention prevents bending tolerance and distortion of the electrode tab 110, and the welding is made stable, the defect rate can be reduced, productivity can be improved, and the work of the operator can be easily There is.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Plasma & Fusion (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

La présente invention concerne un procédé de soudage de languettes d'électrode, et plus particulièrement, un procédé de soudage de languettes d'électrode comprenant l'assemblage d'un module de batterie et le recintrage, afin d'empêcher un défaut et une torsion des languettes d'électrode, qui se produisent lors de l'assemblage du module ou de l'assemblage de parties additionnelles, permettant ainsi de réduire le taux de pertes et d'améliorer la productivité.
PCT/KR2013/005430 2012-06-20 2013-06-20 Procédé de soudage de languettes d'électrode WO2013191480A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020120066052A KR101941686B1 (ko) 2012-06-20 2012-06-20 전극 탭 용접 방법
KR10-2012-0066052 2012-06-20

Publications (1)

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WO2013191480A1 true WO2013191480A1 (fr) 2013-12-27

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PCT/KR2013/005430 WO2013191480A1 (fr) 2012-06-20 2013-06-20 Procédé de soudage de languettes d'électrode

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3305460A4 (fr) * 2016-05-18 2018-07-11 LG Chem, Ltd. Appareil de soudage de fils, module de batterie fabriqué au moyen dudit appareil de soudage de fils et bloc-batterie comprenant ledit module de batterie
CN110537268A (zh) * 2017-04-20 2019-12-03 A123系统有限责任公司 电池触片配置
WO2021234092A1 (fr) * 2020-05-20 2021-11-25 Saft Ensemble électrochimique, procédé et installation de fabrication correspondants
EP4016685A1 (fr) * 2020-12-21 2022-06-22 Transportation IP Holdings, LLC Système et procédé de fabrication d'une barre omnibus

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KR20160107643A (ko) 2015-03-04 2016-09-19 주식회사 코캄 2차 전지의 그리드와 전극 탭의 연결 방법
KR20210089448A (ko) * 2020-01-08 2021-07-16 주식회사 엘지에너지솔루션 접속 플레이트를 구비한 배터리 팩
KR20240002300A (ko) 2022-06-29 2024-01-05 현대자동차주식회사 전극 적층체 및 이의 제조방법

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3305460A4 (fr) * 2016-05-18 2018-07-11 LG Chem, Ltd. Appareil de soudage de fils, module de batterie fabriqué au moyen dudit appareil de soudage de fils et bloc-batterie comprenant ledit module de batterie
US10603747B2 (en) 2016-05-18 2020-03-31 Lg Chem, Ltd. Lead welding apparatus, battery module manufactured by the lead welding apparatus, and battery pack comprising the battery module
CN110537268A (zh) * 2017-04-20 2019-12-03 A123系统有限责任公司 电池触片配置
CN110537268B (zh) * 2017-04-20 2023-04-04 A123系统有限责任公司 电池触片配置
WO2021234092A1 (fr) * 2020-05-20 2021-11-25 Saft Ensemble électrochimique, procédé et installation de fabrication correspondants
FR3110772A1 (fr) * 2020-05-20 2021-11-26 Saft Ensemble électrochimique, procédé et installation de fabrication correspondants
EP4016685A1 (fr) * 2020-12-21 2022-06-22 Transportation IP Holdings, LLC Système et procédé de fabrication d'une barre omnibus
US11826850B2 (en) 2020-12-21 2023-11-28 Transportation Ip Holdings, Llc System and method for manufacturing a busbar

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KR20130142656A (ko) 2013-12-30
KR101941686B1 (ko) 2019-01-24

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