KR19990002559U - Positive plate for secondary battery - Google Patents
Positive plate for secondary battery Download PDFInfo
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- KR19990002559U KR19990002559U KR2019970016133U KR19970016133U KR19990002559U KR 19990002559 U KR19990002559 U KR 19990002559U KR 2019970016133 U KR2019970016133 U KR 2019970016133U KR 19970016133 U KR19970016133 U KR 19970016133U KR 19990002559 U KR19990002559 U KR 19990002559U
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- positive electrode
- electrode plate
- electrode tab
- active material
- secondary battery
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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
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
이차 전지용 양극판에 관한 것으로서, 양극탭이 부착되기 위하여 활물질이 제거되는 부위인 무지부의 면적을 용접 강도에 영향을 주지 않는 범위안에서 최소화함으로써 활물질의 양을 증가시키고, 양극탭의 용접을 용이하게 할 수 있는 이차 전지용 양극판에 관한 것이다.The present invention relates to a positive electrode plate for a secondary battery, which minimizes the area of an uncoated portion, which is a region where an active material is removed, to increase the amount of the active material and facilitates welding of the positive electrode tab. It relates to a positive electrode plate for a secondary battery.
Description
본 고안은 이차 전지용 양극판에 관한 것으로, 좀더 상세하게는 양극판의 활물질 제거량을 최소화하여 전지의 용량을 증가시키며, 양극탭의 용접을 용이하게 실시할 수 있는 이차 전지용 양극판에 관한 것이다.The present invention relates to a positive electrode plate for a secondary battery, and more particularly, to a positive electrode plate for a secondary battery which can increase the capacity of the battery by minimizing the amount of active material removed from the positive electrode plate and easily perform welding of the positive electrode tab.
전지의 용량은 크게 양극판과 음극판이 보유하는 활물질의 양으로 결정되며, 상기 활물질의 양이 증가할수록 고율의 충방전이 가능하여 전지의 성능 향상에 기여하게 된다.The capacity of the battery is largely determined by the amount of the active material possessed by the positive electrode plate and the negative electrode plate, and as the amount of the active material increases, a high rate of charge and discharge is possible, thereby contributing to the performance improvement of the battery.
일반적으로 이차 전지는 충전과 방전을 반복하여 여러 번 사용할 수 있는 전지로서, 양극판과 음극판이 격리판을 사이에 두고 배치되는 극판군과, 상기 양극판과 양극탭으로 연결되어 양극단자 기능을 갖는 캡어셈블리와, 상기 극판군을 담고 있으며 음극판과 전기적으로 연결되어 음극단자 기능을 갖는 캔으로 구성되어 있다.In general, a secondary battery is a battery which can be repeatedly used for charging and discharging. A secondary battery includes a positive electrode plate and a negative electrode plate arranged with a separator plate interposed therebetween, and a cap assembly connected to the positive electrode plate and the positive electrode tab to have a positive terminal function. And a can containing the electrode plate group and electrically connected to the negative electrode plate and having a negative electrode terminal function.
상기 극판군을 이루는 양극판과 음극판에는 각각 양극 활물질과 음극 활물질이 도포되어 있고, 이는 격리판이 함습하고 있는 전해액을 매개로 화학반응을 진행하여 전자를 발생시킴으로써 전기 에너지를 생성한다.A positive electrode active material and a negative electrode active material are respectively coated on the positive electrode plate and the negative electrode plate constituting the electrode plate group, which generates electrical energy by performing a chemical reaction through an electrolyte solution in which the separator is impregnated.
이와 같은 화학반응에 의해 양극판에서 생성되는 양전기는 캡어셈블리를 통하여 외부의 양극단자로, 음극판에서 생성되는 음전기는 캔을 통하여 외부의 음극단자로 배출된다.The positive electricity generated in the positive electrode plate by the chemical reaction is discharged to the external positive electrode terminal through the cap assembly, and the negative electric charge generated in the negative electrode plate is discharged to the external negative electrode terminal through the can.
통상적으로 상기 양극판은 집전체인 니켈판에 활물질인 미세한 산화물을 일정한 두께로 충진한 다음 압연함으로써 형성되며, 캡어셈블리와 연결되기 위하여 양극탭을 부착하게 된다.Typically, the positive electrode plate is formed by filling a nickel oxide, which is a current collector, with a fine oxide, which is an active material, to a predetermined thickness and then rolling, and attaching a positive electrode tab to be connected to a cap assembly.
상기 양극탭은 그 한 쪽 단부가 양극판에 용접되고 다른 쪽 단부는 캡어셈블리에 용접되어 상기 양극판의 양전기를 캡어셈블리에 전달하는 역할을 한다.The positive electrode tab has one end welded to the positive electrode plate and the other end welded to the cap assembly, and serves to transfer the positive electrode of the positive electrode plate to the cap assembly.
도 3은 종래 기술에 의한 이차 전지의 양극판과 양극탭의 결합을 나타내는 도면으로서, (a)도면에서 도시하는 바와 같이 양극 활물질이 충진되어 있는 양극판(1)과, 양극판(1)의 상부에 형성되는 무지부(1a)와, 무지부(1a)에 부착될 양극탭(3)이 도시되어 있다.FIG. 3 is a view illustrating a combination of a positive electrode tab and a positive electrode tab of a secondary battery according to the prior art, and is formed on the positive electrode plate 1 filled with a positive electrode active material and the upper part of the positive electrode plate 1 as shown in FIG. The uncoated portion 1a and the positive electrode tab 3 to be attached to the uncoated portion 1a are shown.
상기 무지부(1a)는 양극판(1)과 양극탭(3)의 용접성을 좋게 하기 위하여 양극판(1)의 활물질을 제거한 부위를 말하며, 무지부(1a)를 형성한 후 상기 양극탭(3)을 무지부(1a)와 접촉시켜 용접을 행함으로써 양극탭(3)과 양극판(1) 사이의 결합이 완성된다.The non-coating portion 1a refers to a portion from which the active material of the positive electrode plate 1 is removed in order to improve weldability of the positive electrode plate 1 and the positive electrode tab 3, and after forming the non-coating portion 1a, the positive electrode tab 3 is formed. The contact between the positive electrode tab 3 and the positive electrode plate 1 is completed by contacting with the plain portion 1a to perform welding.
이를 나타내는 것이 (b)도면으로서, 무지부(1a)와 접촉하는 양극탭(3)에 소정의 간격을 사이에 두고 점용접을 수회 실시하여 용접부(5)를 형성하게 된다.This is shown in (b), and the welding part 5 is formed by performing spot welding several times on the positive electrode tab 3 which contacts the plain part 1a at predetermined intervals.
그러나 종래의 이차 전지용 양극판은 활물질이 제거되는 부위인 무지부의 면적이 통상적으로 양극탭의 면적보다 크게 형성되어 양극판에 충진되는 활물질의 양을 감소시키는 요인으로 작용한다.However, in the conventional secondary battery positive electrode plate, the area of the non-coated portion, which is a portion from which the active material is removed, is generally larger than the area of the positive electrode tab, thereby acting as a factor of reducing the amount of active material filled in the positive electrode plate.
또한 양극탭의 부착 면적 주위로 여분의 무지부가 형성되어 있으므로 용접시 양극탭이 움직여서 비스듬하게 용접되어 용접불량 요인이 발생하는 문제점이 있다.In addition, since an extra solid portion is formed around the attachment area of the positive electrode tab, there is a problem in that a welding defect occurs because the positive electrode tab moves obliquely during welding.
따라서 본 고안은 상기한 문제점을 해소하기 위하여 안출된 것으로서, 본 고안의 목적은 무지부의 면적을 최소화하여 활물질의 양을 최대로 하고, 양극탭의 용접을 용이하게 실시할 수 있는 이차 전지용 양극판을 제공하는데 있다.Therefore, the present invention has been devised to solve the above problems, and an object of the present invention is to minimize the area of the uncoated portion to maximize the amount of the active material, and to provide a positive electrode plate for a secondary battery that can easily carry out welding of the positive electrode tab. It is.
상기의 목적을 달성하기 위하여 본 고안은, 양극탭의 부착을 위하여 활물질이 제거되는 부위인 무지부의 폭이 양극탭의 폭과 동일하게 형성되는 이차 전지용 양극판을 제공한다.In order to achieve the above object, the present invention provides a positive electrode plate for a secondary battery in which the width of the plain portion, which is a portion at which the active material is removed, is formed to be the same as the width of the positive electrode tab.
또한 양극탭의 부착을 위하여 활물질이 제거되는 부위인 무지부의 폭이 양극탭의 폭보다 작게 형성되는 이차 전지용 양극판을 제공한다.The present invention also provides a positive electrode plate for a secondary battery in which a width of an uncoated portion, which is a portion from which an active material is removed, is smaller than a width of a positive electrode tab for attachment of a positive electrode tab.
이에 따라 활물질이 양이 증가되어 전지의 용량을 증가시키며, 용접의 기준선이 마련되어 용이한 용접을 실시할 수 있는 것이다.Accordingly, the amount of the active material is increased to increase the capacity of the battery, and a baseline of welding is provided to facilitate the welding.
도 1은 본 고안의 제1 실시예에 의한 이차 전지용 양극판과 양극탭의 결합을 나타내는 정면도.1 is a front view showing a combination of a positive electrode tab and a positive electrode tab for a secondary battery according to a first embodiment of the present invention.
도 2는 본 고안의 제2 실시예에 의한 이차 전지용 양극판과 양극탭의 결합을 나타내는 정면도.Figure 2 is a front view showing the coupling of the positive electrode tab and the positive electrode tab for a secondary battery according to a second embodiment of the present invention.
도 3은 종래 기술에 의한 이차 전지용 양극판과 양극탭의 결합을 나타내는 정면도.Figure 3 is a front view showing the coupling of the positive electrode tab and the positive electrode tab for a secondary battery according to the prior art.
이하, 첨부된 도면을 참조하여 본 고안의 바람직한 일실시예를 상세히 설명하면 다음과 같다.Hereinafter, a preferred embodiment of the present invention with reference to the accompanying drawings in detail as follows.
도 1은 본 고안의 제1 실시예에 따른 이차 전지용 양극판과 양극탭의 결합을 나타내는 도면으로서, 양극 활물질이 충진되어 있는 양극판(2)과, 양극판(2)의 상부에 형성되는 무지부(2a)와, 무지부(2a)와 접하며 부착되는 양극탭(4)과, 양극탭(4)을 양극판(2)에 부착시키기 위한 용접부(6)가 도시되어 있다.1 is a view showing a combination of a positive electrode tab and a positive electrode tab for a secondary battery according to a first embodiment of the present invention, the positive electrode plate 2 is filled with a positive electrode active material, and the plain portion 2a formed on the upper portion of the positive electrode plate 2 ), A positive electrode tab 4 in contact with the plain portion 2a, and a welding portion 6 for attaching the positive electrode tab 4 to the positive electrode plate 2 are shown.
(a)도면은 양극탭(4)을 부착하기 전의 도면으로서, 상기 양극판(2)은 집전체인 니켈판에 활물질인 산화제를 충진하고 건조 압연한 후 일정한 크기에 맞추어 절단함으로써 제조된다.(a) is a drawing before attaching the positive electrode tab 4, and the positive electrode plate 2 is manufactured by filling an nickel plate, which is a current collector, with an oxidizing agent as an active material, followed by dry rolling, and cutting it to a certain size.
상기 양극판(2)의 상부에는 양극탭(4)을 부착하기 위하여 활물질이 제거되는 부위인 무지부(2a)가 형성되어 있다.On the upper portion of the positive electrode plate 2, a non-coating portion 2a, which is a portion from which the active material is removed, is attached to the positive electrode tab 4.
상기 활물질의 제거에는 활물질을 충진하기 전 무지부(2a)가 형성될 곳에 절연테이프를 부착하고 활물질을 충진한 후 절연테이프를 제거하여 무지부(2a)를 형성하는 방법과, 활물질이 충진된 양극판(2)에 소정의 압력으로 물을 분사하여 활물질을 이탈시켜 무지부(2a)를 형성하는 방법 등이 사용된다.In order to remove the active material, a method of forming an uncoated portion 2a by attaching an insulating tape to a place where the uncoated portion 2a is to be formed before filling the active material and filling the active material and then removing the insulating tape, and a positive electrode plate filled with the active material A method of spraying water at a predetermined pressure on (2) to release the active material to form the uncoated portion 2a, or the like is used.
이와 같은 방법에 의해 무지부(2a)를 형성하는 바, 상기 무지부(2a)의 폭은 도시하는 바와 같이 양극탭(4)이 양극판(2)에 부착되기 위하여 양극판(2)에 접촉하는 면적과 동일한 크기로 형성된다.By forming the plain portion 2a in this manner, the width of the plain portion 2a is the area where the positive electrode tab 4 contacts the positive electrode plate 2 so as to be attached to the positive electrode plate 2, as shown. It is formed in the same size as.
이와 같이 무지부(2a)를 형성한 후 (b)도면에서와 같이 양극탭(4)을 상기 무지부(2a)에 위치시키고 용접공정을 거쳐 용접부(6)를 형성하면 상기 양극판(2)과 양극탭(4)의 결합이 완성된다.After forming the uncoated portion 2a as described above, when the positive electrode tab 4 is positioned on the uncoated portion 2a and the welded portion 6 is formed through the welding process as shown in the drawing (b), the positive electrode plate 2 and The bonding of the positive electrode tab 4 is completed.
상기 용접은 점용접(spot welding) 작업으로 이루어지며, 무지부(2a)의 면적과 양극탭(4)이 위치하는 공간이 동일하므로 용접 작업시 양극탭(4)이 비스듬하게 배치될 여유 공간이 존재하지 않아 정확하게 용접이 이루어지게 된다.The welding is performed by spot welding, and since the area of the plain portion 2a and the space where the positive electrode tab 4 is located are the same, there is a free space in which the positive electrode tab 4 is obliquely arranged during the welding operation. It does not exist, so welding is performed accurately.
도 2는 본 고안의 제2 실시예에 따른 이차 전지용 양극판과 양극탭의 결합을 나타내는 도면으로서, 양극 활물질이 충진되어 있는 양극판(2)과, 양극판(2)의 상부에 형성되는 무지부(2a)와, 상기 양극판(2)에 부착되는 양극탭(4)과, 양극탭(4)을 양극판(2)에 부착시키기 위한 용접부(6)가 도시되어 있다.2 is a view showing a combination of a positive electrode tab and a positive electrode tab for a secondary battery according to a second embodiment of the present invention, the positive electrode plate 2 is filled with a positive electrode active material, and the plain portion 2a formed on the upper portion of the positive electrode plate 2 ), A positive electrode tab 4 attached to the positive electrode plate 2, and a weld 6 for attaching the positive electrode tab 4 to the positive electrode plate 2 are shown.
(a)도면은 양극탭(4)을 부착하기 전의 도면으로서, 상기 무지부(2a)는 도시하는 바와 같이 양극탭(4)의 폭보다 작게 형성되어 있으며, 무지부(2a)의 형성 후 (b)도면과 같이 무지부(2a)의 상부로 양극탭(4)을 배치하고 용접 작업을 행하여 용접부(6)를 형성함으로써 상기 양극탭(4)을 양극판(2)에 결합시키게 된다.(a) is a drawing before attaching the positive electrode tab 4, and the plain portion 2a is formed smaller than the width of the positive electrode tab 4, as shown, and after the formation of the plain portion 2a ( b) The positive electrode tab 4 is coupled to the positive electrode plate 2 by arranging the positive electrode tab 4 on the top of the plain portion 2a and performing a welding operation to form the weld portion 6 as shown in the drawing.
상기 무지부(2a)는 용접 강도에 영향을 주지 않는 범위안에서 양극탭(4)이 용접될 수 있는 소정의 면적으로 형성된다.The plain portion 2a is formed in a predetermined area to which the positive electrode tab 4 can be welded within a range that does not affect the welding strength.
이에 따라 양극판(2)에 충진되는 활물질의 양이 증가되어 전지의 충진율이 향상된다.Accordingly, the amount of the active material filled in the positive electrode plate 2 is increased to improve the filling rate of the battery.
이와 같이 본 고안은 용접 강도에 영향을 주지 않는 범위안에서 무지부의 면적을 최소화함으로써 활물질의 보유량을 높여 전지의 용량을 증가시키며, 양극탭이 위치할 공간에 양극탭을 정확히 배치시켜 용접 불량을 감소시킬 수 있는 효과가 있는 것이다.As such, the present invention increases the battery capacity by increasing the amount of active material retained by minimizing the area of the non-coated portion within a range that does not affect the welding strength, and accurately reduces the welding defect by accurately placing the positive electrode tab in the space where the positive electrode tab is located. It can be effective.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970016133U KR19990002559U (en) | 1997-06-27 | 1997-06-27 | Positive plate for secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019970016133U KR19990002559U (en) | 1997-06-27 | 1997-06-27 | Positive plate for secondary battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19990002559U true KR19990002559U (en) | 1999-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019970016133U KR19990002559U (en) | 1997-06-27 | 1997-06-27 | Positive plate for secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19990002559U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101050288B1 (en) * | 2009-10-01 | 2011-07-19 | 삼성에스디아이 주식회사 | Electrode assembly and secondary battery having same |
| JP2015118772A (en) * | 2013-12-17 | 2015-06-25 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Lithium ion secondary battery, and method of manufacturing the same |
-
1997
- 1997-06-27 KR KR2019970016133U patent/KR19990002559U/en not_active Application Discontinuation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101050288B1 (en) * | 2009-10-01 | 2011-07-19 | 삼성에스디아이 주식회사 | Electrode assembly and secondary battery having same |
| US8765298B2 (en) | 2009-10-01 | 2014-07-01 | Samsung Sdi Co., Ltd. | Electrode assembly having electrode plate with cutoff portion and rechargeable battery having the same |
| JP2015118772A (en) * | 2013-12-17 | 2015-06-25 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Lithium ion secondary battery, and method of manufacturing the same |
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