KR19980037992A - How to attach the positive electrode tab of the battery - Google Patents

How to attach the positive electrode tab of the battery Download PDF

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Publication number
KR19980037992A
KR19980037992A KR1019960056817A KR19960056817A KR19980037992A KR 19980037992 A KR19980037992 A KR 19980037992A KR 1019960056817 A KR1019960056817 A KR 1019960056817A KR 19960056817 A KR19960056817 A KR 19960056817A KR 19980037992 A KR19980037992 A KR 19980037992A
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South Korea
Prior art keywords
positive electrode
electrode tab
electrode plate
battery
tab
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KR1019960056817A
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Korean (ko)
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박준용
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손욱
삼성전관 주식회사
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Priority to KR1019960056817A priority Critical patent/KR19980037992A/en
Publication of KR19980037992A publication Critical patent/KR19980037992A/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
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/20—Bonding
    • B23K26/21—Bonding by welding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

본 발명은 전지용 양극판에 양극단자와 연결될 양극탭을 부착하는 방법에 관한 것이다. 본 발명의 전지의 양극탭 부착방법에 따르면, 양극판에 양극탭을 레이저용접하기 전에 양극탭이 부착될 부위를 미리 압착시킴으로써, 활물질의 제거로 인하여 양극판에 형성되는 빈 공간부를 효과적으로 제거되어, 양극탭이 그 양극판에 확실하게 레이저용접될 수 있다.The present invention relates to a method of attaching a positive electrode tab to be connected to a positive electrode terminal on a battery positive plate. According to the method of attaching the positive electrode tab of the battery of the present invention, by pressing the portion to which the positive electrode tab is attached before the positive electrode tab is laser welded to the positive electrode plate, the void space formed in the positive electrode plate is effectively removed due to the removal of the active material, and thus the positive electrode tab This can be reliably laser-welded to the positive electrode plate.

Description

전지의 양극탭 부착방법How to attach the positive electrode tab of the battery

본 발명은 전지용 양극판에 양극단자와 연결될 양극탭을 부착하는 방법에 관한 것으로서, 특히 그 부착이 보다 확실하게 이루어질 수 있도록 개선된 전지의 양극탭 부착방법에 관한 것이다.The present invention relates to a method for attaching a positive electrode tab to be connected to a positive electrode terminal on a positive electrode plate for a battery, and more particularly, to a method for attaching a positive electrode tab of a battery so that the attachment can be more reliably performed.

각종 전기 전자제품에 전원공급용으로 널리 사용되는 통형전지는 일반적으로, 도 1에 개략적으로 도시된 바와 같이, 통형의 케이스(11)와, 이 케이스(11)에 수납되는 전지요소(10)와, 케이스(11)의 개구부에 결합된 양극단자(15)를 구비하고 있다. 상기 전지요소(10)는 양극판(12)과, 음극판(14)과, 이 양극판(12)과 음극판(14) 사이에 개재되는 절연부재(13)를 포함하여 이루어진다. 상기 양극판(12)은 잘 알려진 바와 같이 다공성플레이트에 활물질을 충전시켜서 이루어지는 것으로, 그 양극판(12)에는 양극탭(17)이 그 양극판(12)의 일측 가장자리에 대해 돌출되게 부착되어 있다. 이 양극탭(17)은 케이스(11)의 개구부를 밀폐하는 밀폐부재(16)를 개재시켜 상기 양극단자(15)에 전기적으로 연결된다.A cylindrical battery widely used for supplying power to various electric and electronic products generally includes a cylindrical case 11, a battery element 10 housed in the case 11, and schematically illustrated in FIG. 1. And a positive electrode terminal 15 coupled to the opening of the case 11. The battery element 10 includes a positive electrode plate 12, a negative electrode plate 14, and an insulating member 13 interposed between the positive electrode plate 12 and the negative electrode plate 14. As is well known, the positive electrode plate 12 is formed by filling an active material in a porous plate, and a positive electrode tab 17 is attached to the positive electrode plate 12 so as to protrude from one edge of the positive electrode plate 12. The positive electrode tab 17 is electrically connected to the positive electrode terminal 15 via a sealing member 16 that seals the opening of the case 11.

상기 양극판(12)에 양극탭(17)을 부착함에 있어서, 종래에는 6-8개 정도의 포인트에 저항용접을 행하여 부착하였다. 그런데, 저항용접에 의한 양극탭 부착방법은, 상기 다수의 용접포인트들을 순차적으로 용접하여야 하므로 양극탭(17)의 부착에 많은 시간이 소요되게 되어, 전지의 생산성 향상을 저해한다는 문제점을 내포하고 있다. 이러한 점을 개선하고자 최근에는 레이저용접에 의해 양극판과 양극탭을 부착하는 방법이 연구되고 있다. 이는, 양극판(12)에 있어서 상기 양극탭(17)이 부착될 부위 내의 활물질을 제거하고 그 부위에 양극탭(17)을 겹쳐둔 후 레이저용접을 행하는 것으로서 1회의 공정으로 양극탭(17)의 부착이 완료되게 되므로 작업이 신속하게 이루어질 수 있게 된다.In attaching the positive electrode tab 17 to the positive electrode plate 12, conventionally, resistance welding was performed at about 6-8 points. However, the method of attaching the positive electrode tab by resistance welding requires a large amount of time to attach the positive electrode tab 17 because the plurality of welding points must be welded sequentially, which impairs the productivity of the battery. . Recently, a method for attaching a positive electrode plate and a positive electrode tab by laser welding has been studied. In the positive electrode plate 12, the active material in the portion to which the positive electrode tab 17 is attached is removed, the positive electrode tab 17 is superposed on the portion, and laser welding is performed. Since the attachment is completed, the work can be made quickly.

한편, 양극판과 양극탭과의 레이저용접을 행함에 있어서, 양극판의 소정부위로부터 활물질을 제거한 후 곧바로 그 부위에 양극탭을 레이저용접하게 되면 양극판에 있어서 상기 활물질이 빠져나감으로 인하여 형성되는 공동부에 의해서 레이저용접이 제대로 이루어지지 않게 되므로, 상기 빈 공간부를 제거할 필요가 있다.On the other hand, in the laser welding of the positive electrode plate and the positive electrode tab, if the positive electrode tab is laser-welded to the portion immediately after removing the active material from the predetermined portion of the positive electrode plate, the cavity portion formed by the escape of the active material in the positive electrode plate Since laser welding is not performed properly, it is necessary to remove the said empty space part.

본 발명은 상술한 점을 감안하여 안출된 것으로, 양극판에 양극탭을 부착함에 있어서, 활물질의 제거로 인하여 양극판에 형성되는 빈 공간부를 효과적으로 제거하여 양극탭이 확실하게 그 양극판에 확실하게 레이저용접될 수 있도록 개선된 전지의 양극탭 부착방법을 제공함에 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and in attaching the positive electrode tab to the positive electrode plate, the positive electrode tab can be reliably laser-welded to the positive electrode plate by effectively removing the empty space formed on the positive electrode plate due to the removal of the active material. An object of the present invention is to provide an improved method for attaching a positive electrode tab of a battery.

도 1은 일반적인 통형전지의 일부를 절제하여 전지요소의 일부를 풀어낸 상태를 도시한 개략적 사시도이다.1 is a schematic perspective view showing a state in which a part of a battery element is removed by cutting a part of a general cylindrical battery.

도 2 내지 도 4는 본 발명의 일 실시예에 따른 전지의 양극탭 부착방법을 설명하기 위한 도면으로서, 도 2는 양극탭이 놓여진 상태의 양극판의 주요부위의 개략적 평면도, 도 3은 도 2에 도시된 부위의 Ⅲ-Ⅲ선 개략적 단면도, 도 4는 레이저용접부위가 압착된 상태의 양극판의 개략적 단면도이다.2 to 4 are views for explaining a method of attaching a positive electrode tab of a battery according to an embodiment of the present invention, Figure 2 is a schematic plan view of the main portion of the positive electrode plate in the positive electrode tab is placed, Figure 3 is FIG. 4 is a schematic cross-sectional view of the III-III line of the portion shown, and FIG. 4 is a schematic cross-sectional view of the positive electrode plate in a state where the laser welding portion is compressed.

도 5는 본 발명의 다른 실시에에 따른 양극탭 부착방법을 설명하기 위한 양극판의 개략적 단면도이다.5 is a schematic cross-sectional view of a positive electrode plate for explaining a method of attaching a positive electrode tab according to another embodiment of the present invention.

도면의 주요부분에 대한 부호의 설명Explanation of symbols for main parts of the drawings

1...전지 12...양극판1 battery 12 anode plate

17...양극탭 90...압착금형17.Anode tab 90.

이와 같은 목적을 달성하기 위하여 본 발명에 따른 전지의 양극탭 부착방법은, 전지용 양극판에 양극단자와 연결될 양극탭을 부착하기 위한 것으로, 양극판에 있어서 상기 양극탭이 부착될 부위로부터 활물질을 제거하는 활물질 제거공정과, 상기 양극판의 상기 활물질이 제거된 부위에 상기 양극탭을 겹쳐두고 그 양극판과 양극탭을 레이저용접하는 공정을 포함하는 방법에 있어서, 상기 활물질 제거공정과 상기 레이저용접공정 사이에, 상기 양극판에 있어서 상기 양극탭과 레이저용접될 부위를 압착시키는 양극판 압착공정이 마련된 점에 특징이 있다.In order to achieve the above object, a method of attaching a positive electrode tab of a battery according to the present invention is to attach a positive electrode tab to be connected to a positive electrode terminal on a positive electrode plate for a battery, and an active material for removing an active material from a portion to which the positive electrode tab is attached in a positive electrode plate. And removing the positive electrode tab on a portion from which the active material is removed from the positive electrode plate, and laser welding the positive electrode plate and the positive electrode tab, wherein the active material is removed between the active material removal step and the laser welding step. The positive electrode plate is characterized in that a positive electrode plate pressing process for pressing the portion to be welded with the positive electrode tab is provided.

이하 첨부된 도 2 내지 도 4를 상기 도 1과 함께 참조하면서 본 발명에 따른 바람직한 실시예를 상세히 설명한다.Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to FIGS. 2 to 4 together with FIG. 1.

도 2 및 도 3은 본 발명에 따른 양극탭 부착방법의 일 실시예를 설명하기 위한 도면으로서, 도 2는 양극판이 압착되기 전의 상태의 개략적 평면도이며, 도 3은 도 2에 도시된 부위의 Ⅲ-Ⅲ선 개략적 단면도이다.2 and 3 are views for explaining an embodiment of the positive electrode tab attachment method according to the present invention, Figure 2 is a schematic plan view of the state before the positive electrode plate is pressed, Figure 3 is a part III of the region shown in Figure 2 Fig. 3 is a schematic cross-sectional view.

먼저 도 2 및 도 3에 도시된 바와 같이, 다공성플레이트에 활물질(124)이 충전되어 이루어지는 양극판으로부터 활물질 제거공정을 통해 양극탭(17)이 부착될 부위(121) 내의 활물질을 제거한다. 이와 같이 하여 양극탭(17)이 부착될 부위(121)에 공간부(125)가 형성되어 있는 양극판(12)을 다이(91) 위에 올려둔다. 그리고, 그 양극판(12)의 상기 활물질이 제거된 부위(121)에 양극탭(17)을 놓아둔 상태에서 그 양극판(12)과 양극탭(17)을 압착금형(90)의 하부에 위치시킨다. 그리고, 소정의 압력을 가해 압착금형(90)을 하강시키게 되면, 하강되는 압착금형(90)이 상기 양극탭(17)을 개재시켜서 양극판(12)을 누르게 된다. 그 후, 압착금형(90)을 다시 상승시키게 되면, 도 4에 도시된 바와 같이 양극판(12)은 상기 양극탭(17)과 레이저용접될 부위(122)가 압착된 상태가 되고, 압착된 부위에 있어서는 활물질의 제거로 인하여 형성되어 있던 빈 공간부(125)가 제거되게 된다. 그 후, 상기 압착부위(122)에서 양극판(12)과 양극탭(17)을 레이저용접하여 양극탭(17)이 양극판(12)에 부착되도록 한다. 이 때, 상기 양극판(12)에 있어서는 활물질이 빠져나감으로 인하여 형성된 빈 공간부(125)가 상기 압착공정에 의해 압착되어 제거되어 버리므로, 양극판(12)과 양극탭(17)과의 레이저용접이 제대로 이루어질 수 있게 된다.First, as shown in FIGS. 2 and 3, the active material in the portion 121 to which the positive electrode tab 17 is attached is removed from the positive electrode plate in which the active material 124 is filled in the porous plate. In this way, the positive electrode plate 12 having the space portion 125 formed on the portion 121 to which the positive electrode tab 17 is attached is placed on the die 91. Then, the positive electrode plate 12 and the positive electrode tab 17 are positioned under the pressing die 90 in a state where the positive electrode tab 17 is placed on the portion 121 of the positive electrode plate 12 from which the active material is removed. . When the pressing die 90 is lowered by applying a predetermined pressure, the lower pressing die 90 presses the positive electrode plate 12 via the positive electrode tab 17. Thereafter, when the pressing die 90 is raised again, the positive electrode plate 12 is in a state in which the positive electrode tab 17 and the portion 122 to be laser welded are compressed, and the compressed portion 90 is pressed. In the above, the empty space 125 formed by the removal of the active material is removed. Thereafter, the positive electrode tab 12 and the positive electrode tab 17 are laser-welded at the crimping portion 122 to attach the positive electrode tab 17 to the positive electrode plate 12. At this time, in the positive electrode plate 12, since the empty space portion 125 formed due to the escape of the active material is compressed and removed by the pressing process, the laser welding between the positive electrode plate 12 and the positive electrode tab 17 is performed. This can be done properly.

본 실시예의 방법에 있어서는 상기 양극탭(17)을 양극판(12)에 올려둔 상태로 압착을 행하도록 되어 있으나, 반드시 이에 한정될 필요는 없다. 예를 들어서 도 5에 도시된 바와 같이 양극탭(17)을 올려두지 않은 상태에서 압착금형을 사용하여 양극판(12)을 압착한 후, 그 양극판(12)에 있어서 상기 압착부(122)가 형성된 면의 반대면에 가상선으로 도시한 바와 같이 양극탭(17)을 위치시킨 후 그 양극판(12)과 양극탭(17)을 상기 압착부(122) 부위에서 레이저용접을 행하더라도 본 발명의 목적이 충분히 달성될 수 있을 것이다.In the method of this embodiment, the positive electrode tab 17 is pressed on the positive electrode plate 12, but is not necessarily limited thereto. For example, as shown in FIG. 5, after pressing the positive electrode plate 12 using a pressing mold in a state where the positive electrode tab 17 is not placed, the pressing part 122 is formed on the positive electrode plate 12. Even if the positive electrode tab 17 is positioned on the opposite side of the surface, and the positive electrode plate 12 and the positive electrode tab 17 are subjected to laser welding at the crimping portion 122, the object of the present invention is achieved. This will be enough to be achieved.

이상에서 살펴본 바와 같이 본 발명의 전지의 양극탭 부착방법에 따르면, 양극판에 양극탭을 레이저용접하기 전에 양극탭이 부착될 부위를 미리 압착시킴으로써, 활물질의 제거로 인하여 양극판에 형성되는 빈 공간부를 효과적으로 제거되어, 양극탭이 그 양극판에 확실하게 레이저용접될 수 있다.As described above, according to the method of attaching the positive electrode tab of the battery of the present invention, before the positive electrode tab is laser-welded to the positive electrode plate, the area to which the positive electrode tab is attached is pressed in advance, so that the empty space part formed on the positive electrode plate due to the removal of the active material is effectively By being removed, the positive electrode tab can be reliably laser welded to the positive electrode plate.

Claims (1)

전지용 양극판에 양극단자와 연결될 양극탭을 부착하기 위한 방법으로, 양극판에 있어서 상기 양극탭이 부착될 부위로부터 활물질을 제거하는 활물질 제거공정과, 상기 양극판의 상기 활물질이 제거된 부위에 상기 양극탭을 겹쳐두고 그 양극판과 양극탭을 레이저용접하는 공정을 포함하는 전지의 양극탭 부착방법에 있어서,A method of attaching a positive electrode tab to be connected to a positive electrode terminal to a battery positive plate, an active material removal process of removing the active material from the portion to be attached to the positive electrode tab in the positive electrode plate, and the positive electrode tab on the portion where the active material of the positive electrode plate is removed In a method of attaching a positive electrode tab of a battery, the method comprising the step of overlapping and laser welding the positive electrode plate and the positive electrode tab, 상기 활물질 제거공정과 상기 레이저용접공정 사이에, 상기 양극판에 있어서 상기 양극탭과 레이저용접될 부위를 압착시키는 양극판 압착공정이 마련된 것을 특징으로 하는 전지의 양극탭 부착방법.And a positive electrode plate pressing step of pressing the positive electrode tab and the portion to be laser welded in the positive electrode plate between the active material removal step and the laser welding step.
KR1019960056817A 1996-11-22 1996-11-22 How to attach the positive electrode tab of the battery KR19980037992A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11355821B2 (en) 2017-06-27 2022-06-07 Lg Chem, Ltd. Method of welding electrode tab and cable type rechargeable battery including electrode manufactured according to the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11355821B2 (en) 2017-06-27 2022-06-07 Lg Chem, Ltd. Method of welding electrode tab and cable type rechargeable battery including electrode manufactured according to the same

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