KR100528898B1 - Electrode roll of secondary battery - Google Patents
Electrode roll of secondary battery Download PDFInfo
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- KR100528898B1 KR100528898B1 KR10-1999-0002195A KR19990002195A KR100528898B1 KR 100528898 B1 KR100528898 B1 KR 100528898B1 KR 19990002195 A KR19990002195 A KR 19990002195A KR 100528898 B1 KR100528898 B1 KR 100528898B1
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- electrode
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- secondary battery
- thin film
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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
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M10/0422—Cells or battery with cylindrical casing
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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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
목적 : 전지의 충방전시에 캔의 내벽과 균일하게 접촉되도록 하고, 충방전에 따른 부피팽창을 흡수할 수 있는 이차전지의 전극롤을 제공한다.PURPOSE: To provide an electrode roll of a secondary battery that can be in uniform contact with the inner wall of the can during charge and discharge of the battery, and can absorb the volume expansion caused by the charge and discharge.
구성 : 본 발명은 양극(36)과 음극(30)의 두 전극 사이에 세퍼레이터(32)를 배치하여 권취한 이차전지의 전극롤(22)에서, 전극롤(22)의 바깥쪽에 배치되는 전극으로 박막기재(40)에 도전성 접착층(42)이 도포되는 도전성 테이프(38)가 부착되어져 캔(20)과 접속되는 구조를 제안한다.Composition: In the present invention, in the electrode roll 22 of the secondary battery wound by disposing the separator 32 between two electrodes of the positive electrode 36 and the negative electrode 30, the electrode is disposed outside the electrode roll 22 The conductive tape 38, to which the conductive adhesive layer 42 is applied, is attached to the thin film base 40, and a structure in which the thin film base 40 is connected to the can 20 is proposed.
효과 : 접착층 내에 분포된 도전성 분말이 박막기재로 전류를 통전시키고, 캔과 박막기재가 균일하게 접촉 가능하며, 박막기재에 의해 전극롤의 부피팽창을 흡수할 수 있다.Effect: The conductive powder distributed in the adhesive layer conducts current through the thin film substrate, the can and the thin film substrate can be contacted uniformly, and the thin film substrate can absorb the volume expansion of the electrode roll.
Description
본 발명은 이차전지의 전극롤에 관한 것으로서, 좀 더 상세하게는 캔의 내측벽에 접촉되어지는 전극롤의 전극과 캔 사이에 전류경로를 확보하고 전극롤의 텐션이 유지되도록 하는 것이다.The present invention relates to an electrode roll of a secondary battery, and more particularly, to secure a current path between the electrode of the electrode roll and the can which is in contact with the inner wall of the can and to maintain the tension of the electrode roll.
이차 전지는 전해물질에 담겨지는 양극과 음극 사이를 연결했을 때 전해물질과 두 전극을 오가는 이온의 물리화학적 반응을 이용한 전지로써, 일차 전지와는 달리 전자 전기제품에서 소모된 에너지를 충전기에 의해 재충전하여 반복 사용할 수 있어 포터블화하는 전자 전기제품과 더불어 급속한 신장을 보이고 있다.A secondary battery is a battery that uses a physicochemical reaction of an electrolyte and ions between two electrodes when it is connected between a cathode and an anode contained in an electrolyte. Unlike a primary battery, a rechargeable battery recharges energy consumed in electronic and electrical appliances. It can be used repeatedly, and it is showing rapid elongation with the portable electronic and electrical appliances.
이러한 이차 전지는 양극이나 음극 혹은 전해물질을 어떤 물질로 사용하냐에 따라 니켈카드뮴전지, 니켈수소전지, 리튬이온전지 및 리튬폴리머 전지 등으로 나뉘며, 형태적으로는 각형, 원통형 및 얇은 판형 전지로 구분된다.These secondary batteries are divided into nickel cadmium batteries, nickel hydride batteries, lithium ion batteries and lithium polymer batteries, depending on which materials are used as positive or negative electrodes or electrolytic materials. do.
여기서, 원통형으로 제조된 전지의 구조는 도 4에 도시한 바와 같이 전극롤(2)을 캔(4)의 내부에 삽입하고, 캔(4)의 개구를 캡 어셈블리(6)로 밀봉하여 얻어지는데, 전극롤(2)은 양극기재에 양극 활물질을 도포한 양극과, 세퍼레이터 및 음극기재에 음극 활물질을 도포한 음극이 함께 밀착된 극판군을 권취하여 얻어지는 것이다.Herein, the structure of the battery manufactured in a cylindrical shape is obtained by inserting the electrode roll 2 into the can 4 and sealing the opening of the can 4 with the cap assembly 6 as shown in FIG. The electrode roll 2 is obtained by winding an electrode plate group in which a cathode coated with a cathode active material on a cathode substrate and a cathode coated with anode active material on a separator and an anode substrate are brought into close contact with each other.
권취된 전극롤(2)은 외곽에 음극의 음극기재(8)가 배치되며 풀리는 것을 방지하고 전극롤(2)의 형태를 유지하기 위해서 접착 테이프(10)로 음극기재(8)의 끝부분을 전극롤(2)의 외주에 부착하여 마감한다.The wound electrode roll 2 is disposed on the outer end of the negative electrode substrate 8 with an adhesive tape 10 in order to prevent loosening and maintain the shape of the electrode roll 2. Attach to the outer circumference of the electrode roll (2) to finish.
그리고, 전극롤(2)의 양극에 접속되는 양극탭(12)은 전극롤(2)의 상부로 인출되어 캡 어셉블리(6)와 용접되어 캡 어셈블리(6)가 양극단자로 되는 것이고, 음극단자는 전극롤(2)의 최외곽에 배치된 음극기재(8)가 캔(4)에 접속되어 캔(4)이 음극단자로 된다..The positive electrode tab 12 connected to the positive electrode of the electrode roll 2 is drawn out to the upper portion of the electrode roll 2 and welded to the cap assembly 6 so that the cap assembly 6 becomes a positive electrode terminal. The negative electrode substrate 8 disposed at the outermost part of the electrode roll 2 is connected to the can 4, so that the can 4 becomes a negative electrode terminal.
이러한 전극롤(2)의 상부와 하부에는 각각 절연판(14)이 배치되어 전극롤(2)이 캡 어셈블리(6) 및 캔(4)과 쇼트되는 것을 방지한다.An insulating plate 14 is disposed on the upper and lower portions of the electrode roll 2 to prevent the electrode roll 2 from shorting with the cap assembly 6 and the can 4.
이렇게 제조된 이차전지는 전극롤이 캔의 내측 벽면에 접촉되는 방식으로써 캔이 음극이 되도록 하는 관벽접촉방식이나, 이는 전지의 충방전시에 부피팽창과 수축을 반복하는 전극롤이 균일하게 캔과 접촉되는 것이 아니라 불균일한 면접촉으로 인한 접촉저항이 전지의 일정한 전류 형성에 문제가 되어왔다.The secondary battery thus manufactured is a tube wall contact method in which the electrode roll is in contact with the inner wall of the can such that the can becomes a negative electrode, but the electrode roll repeating volume expansion and contraction during charging and discharging of the battery is uniform with the can. Contact resistance due to non-uniform surface contact, rather than contact, has been a problem in forming a constant current of a battery.
그리고, 권취된 전극롤을 마감하기 위해 부착되는 접착 테이프가 충방전시 발생하는 전극롤의 팽창량을 흡수하지 못해 전극롤에서 떨어져 나가거나 찢겨지는 문제점이 발생한다.In addition, the adhesive tape attached to close the rolled electrode roll does not absorb the amount of expansion of the electrode roll generated during charging and discharging.
이러한 문제점을 해결하기 위해 안출된 것으로 전지의 충방전시에 캔의 내벽과 균일하게 접촉되도록 하고, 충방전에 따른 부피팽창을 흡수할 수 있는 이차전지의 전극롤을 제공하는 것이 목적이다.It is an object of the present invention to provide an electrode roll of a secondary battery that is designed to solve the above problems and to make uniform contact with the inner wall of a can during charging and discharging of a battery and to absorb volume expansion caused by charging and discharging.
이를 위하여, 본 발명은 양극과 음극의 두 전극 사이에 세퍼레이터를 배치하여 권취한 이차전지의 전극롤에서, 전극롤의 바깥쪽에 배치되는 전극으로 박막기재에 도전성 접착층이 도포되는 도전성 테이프가 부착되어져 캔과 접속되는 구조를 제안한다.To this end, in the present invention, in the electrode roll of the secondary battery wound by placing a separator between two electrodes of the positive electrode and the negative electrode, a conductive tape is coated with a conductive adhesive layer on a thin film substrate as an electrode disposed outside the electrode roll. We propose a structure that is connected with.
여기서, 도전성 테이프는 전극의 끝부분에 부착되어 전극롤의 권취가 마감되도록 하는 것이며, 도전성 접착층은 접착제와 도전성 분말로 되고, 박막기재는 구리로 제조 가능하다.Here, the conductive tape is attached to the end of the electrode so that the winding of the electrode roll is finished, the conductive adhesive layer is an adhesive and a conductive powder, the thin film substrate can be made of copper.
이에 따라, 접착층 내에 분포된 도전성 분말이 박막기재로 전류를 통전시키고, 캔과 박막기재가 균일하게 접촉 가능하며, 박막기재에 의해 전극롤의 부피팽창을 흡수할 수 있게 되는 것이다. Accordingly, the conductive powder distributed in the adhesive layer conducts current through the thin film substrate, the can and the thin film substrate can be uniformly contacted, and the thin film substrate can absorb the volume expansion of the electrode roll.
이하 본 발명에 따른 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명한다. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 발명에 따른 이차전지의 구조를 보인 단면도이고, 도 2는 이차전지의 내부로 수납되는 전극롤을 사시도로 나타내고 있다.1 is a cross-sectional view showing the structure of a secondary battery according to the present invention, Figure 2 is a perspective view of an electrode roll accommodated into the secondary battery.
도면에서 알 수 있듯이, 이차전지는 캔(20)의 내부에 전극롤(22)이 수납되고 캔(20)의 개구를 캡 어셈블리(24)로 밀봉한 구조로 되며, 전극롤(22)의 상하부에는 캡 어셈블리(24)와 캔(20)과 접촉을 피하기 위해 절연판(26)이 배치된다.As can be seen in the figure, the secondary battery has a structure in which the electrode roll 22 is accommodated in the can 20 and the opening of the can 20 is sealed with the cap assembly 24, and the upper and lower parts of the electrode roll 22 are formed. Insulation plate 26 is disposed to avoid contact with cap assembly 24 and can 20.
상기 전극롤(22)은 음극기재(28)에 음극활물질을 도포한 음극(30)과, 세퍼레이터(32) 및 양극기재(34)에 양극활물질을 도포한 양극(36)으로 구성되어지되, 바람직하게는 음극(30), 세퍼레이터(32), 양극(36) 및 세퍼레이터(32)의 순서로 밀착된 극판군을 권취하여 얻어지는 것이며, 전극롤(22)의 가장 바깥쪽에는 음극이 위치하고 캔(20)의 내측벽과 음극(30)의 원활한 접속을 위하여 음극(30)의 음극기재(28)가 길게 연장되어 전극롤(22)의 외주로 감싸게 하였다.The electrode roll 22 is composed of a negative electrode 30 coated with a negative electrode active material on the negative electrode substrate 28, and a positive electrode 36 coated with a positive electrode active material on the separator 32 and the positive electrode substrate 34, preferably Preferably, the cathode 30, the separator 32, the anode 36, and the separator 32 are obtained by winding a group of closely adhered electrode plates, and the cathode is positioned on the outermost side of the electrode roll 22 and can 20 In order to smoothly connect the inner wall of the C) and the cathode 30, the cathode substrate 28 of the cathode 30 is extended to be wrapped around the outer circumference of the electrode roll 22.
이러한 음극기재(28)의 끝부분에는 본 발명의 특징에 따른 도전성 테이프(38)가 부착되어져 전극롤(22)의 권취를 마감하게 되는 데, 상기 도전성 테이프(38)는 도 2와 도 3에 도시한 바와 같이 박막기재(40)에 도전성 접착층(42)이 도포된 구조로 되고, 도전성 접착층(42)은 접착제(44)와 도전성 분말(46)로 구성된다.The end of the negative electrode substrate 28 is attached to the conductive tape 38 according to the characteristics of the present invention to finish the winding of the electrode roll 22, the conductive tape 38 is shown in FIGS. As illustrated, the conductive adhesive layer 42 is coated on the thin film base 40, and the conductive adhesive layer 42 is composed of the adhesive 44 and the conductive powder 46.
상기 박막기재(40)는 전도도가 양호한 구리로 제조되어지며, 도전성 분말(46)은 니켈, 알루미늄, 구리 등의 분말로 될 수 있다.The thin film substrate 40 is made of copper having good conductivity, and the conductive powder 46 may be made of powder of nickel, aluminum, copper, or the like.
이와 같은 도전성 테이프(38)로 전극롤(22)의 권취를 마감한 상태에서 전극롤(22)을 캔(20)의 내부로 삽입하여 이차전지의 제조를 완료한 후 전지를 충방전하게 되면, 음극기재(28)와 접촉된 도전성 분말(46)로 전류가 흐르게 되고, 이 전류는 박막기재(40)를 경유하여 캔(20)으로 흐르게 되어 캔(20)은 음극단자가 되는 것이다.When the electrode roll 22 is inserted into the can 20 in the state where the winding of the electrode roll 22 is finished with the conductive tape 38, the battery is charged and discharged after completing the manufacture of the secondary battery. A current flows into the conductive powder 46 in contact with the negative electrode base 28, and this current flows into the can 20 via the thin film base 40, so that the can 20 becomes a negative electrode terminal.
이 때, 전지가 충전되는 과정이라면 전극롤(22)이 팽창하기 마련인데, 본 발명의 특징에 따른 도전성 테이프(38)는 연신율이 양호한 구리로 박막기재(40)로 제조하였기 때문에 끊어짐없이 전극롤(22)의 부피팽창을 흡수하게 된다.In this case, the electrode roll 22 is expanded when the battery is being charged. Since the conductive tape 38 according to the characteristics of the present invention is made of the thin film base 40 made of copper having good elongation, the electrode roll is not broken. The volume expansion of (22) is absorbed.
전술한 실시예에서는 음극기재가 전극롤의 바깥쪽에 배치되는 경우에 대해 설명했으나, 양극기재가 전극롤의 바깥쪽에 배치되더라도 동일한 결과를 얻을 수 있으며, 이러한 구조는 원통형 이차전지에 국한되지 아니하며 양극, 세퍼레이터 및 음극을 권취하여 사용하는 모든 이차전지에 적용될 수 있음을 밝히는 바이다.In the above-described embodiment, the case in which the negative electrode substrate is disposed on the outer side of the electrode roll has been described. However, even when the positive electrode substrate is disposed on the outer side of the electrode roll, the same result can be obtained. Such a structure is not limited to the cylindrical secondary battery. It is found that the separator and the negative electrode can be applied to all secondary batteries.
이상에서 살펴본 바와 같이 본 발명에 따른 실시예는 종래의 문제점을 실질적으로 해소하고 있다.As described above, the embodiment of the present invention substantially solves the conventional problems.
즉, 전극롤의 바깥쪽에 위치한 음극기재 뿐만 아니라 전극롤의 권취를 마감하기 위해 부착되는 테이프가 도전성을 띠므로 캔과 전극롤이 균일하게 면접촉이 가능하여 접촉저항을 줄일 수 있어 일정한 전류 형성에 도움이 된다.That is, since the tape attached to finish the winding of the electrode roll as well as the negative electrode substrate located on the outer side of the electrode roll is conductive, the can and the electrode roll can be uniformly contacted with each other, thereby reducing the contact resistance. It helps.
또한, 도전성 테이프를 구성하는 박막기재가 구리로 되어 있어 연신율이 뛰어나기 때문에 전지의 충방전에 따른 전극롤의 부피팽창을 흡수함과 아울러 전극롤의 팽창량을 흡수할 수 있어 도전성 테이프가 전극롤에서 떨어져 나가거나 찢겨지는 것을 방지할 수 있다. In addition, since the thin film substrate constituting the conductive tape is made of copper and has an excellent elongation, it is possible to absorb the volume expansion of the electrode roll due to charge and discharge of the battery and to absorb the expansion amount of the electrode roll. You can prevent it from falling off or torn.
도 1은 본 발명에 따른 전극롤이 삽입되는 이차전지를 도시한 분해 사시도,1 is an exploded perspective view illustrating a secondary battery in which an electrode roll is inserted according to the present invention;
도 2는 이차전지의 일부를 도시한 측단면도,2 is a side cross-sectional view showing a part of a secondary battery;
도 3은 도전성 테이프를 도시한 측단면도,3 is a side cross-sectional view showing a conductive tape;
도 4는 종래 공지된 이차전지를 도시한 분해 사시도.Figure 4 is an exploded perspective view showing a conventionally known secondary battery.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
20 : 캔22 : 전극롤20: can 22: electrode roll
24 : 캡 어셈블리26 : 절연판24 cap assembly 26 insulation plate
28 : 음극기재30 : 음극28: negative electrode material 30: negative electrode
32 : 세퍼레이터34 : 양극기재32: separator 34: positive electrode substrate
36 : 양극38 : 도전성 테이프36: anode 38: conductive tape
40 : 박막기재42 : 도전성 접착층40: thin film base material 42: conductive adhesive layer
44 : 접착제46 : 도전성 분말44 adhesive 46 conductive powder
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0002195A KR100528898B1 (en) | 1999-01-25 | 1999-01-25 | Electrode roll of secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-1999-0002195A KR100528898B1 (en) | 1999-01-25 | 1999-01-25 | Electrode roll of secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20000051639A KR20000051639A (en) | 2000-08-16 |
| KR100528898B1 true KR100528898B1 (en) | 2005-11-16 |
Family
ID=19572254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR10-1999-0002195A KR100528898B1 (en) | 1999-01-25 | 1999-01-25 | Electrode roll of secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100528898B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9748597B2 (en) | 2014-09-15 | 2017-08-29 | Samsung Electronics Co., Ltd. | Flexible electrode assembly and electrochemical device including the electrode assembly |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100948848B1 (en) * | 2003-01-18 | 2010-03-22 | 삼성에스디아이 주식회사 | Battery unit and lithium secondary battery applying the same |
| KR100601563B1 (en) | 2004-05-19 | 2006-07-19 | 삼성에스디아이 주식회사 | Cylindrical lithium ion secondary battery |
| KR100601515B1 (en) * | 2004-09-24 | 2006-07-19 | 삼성에스디아이 주식회사 | Secondary battery |
| KR100601516B1 (en) * | 2004-09-24 | 2006-07-19 | 삼성에스디아이 주식회사 | Secondary battery |
| KR100601517B1 (en) * | 2004-09-24 | 2006-07-19 | 삼성에스디아이 주식회사 | Secondary battery |
| KR100825207B1 (en) * | 2005-12-22 | 2008-04-25 | 주식회사 엘지화학 | Secondary Battery of Improved Safety |
| KR100719725B1 (en) | 2005-12-29 | 2007-05-17 | 삼성에스디아이 주식회사 | Electrode assembly for lithium rechargeable battery and lithium rechargeable battery using the same |
| KR101310486B1 (en) * | 2008-04-03 | 2013-09-24 | 주식회사 엘지화학 | Seal tape and secondary battery comprising the same |
| US9401504B2 (en) | 2012-06-08 | 2016-07-26 | Samsung Sdi Co., Ltd. | Battery cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150971A (en) * | 1992-10-30 | 1994-05-31 | Sony Corp | Cylindrical nonaqueous electrolyte secondary battery |
| KR20000051443A (en) * | 1999-01-22 | 2000-08-16 | 김순택 | Electrode roll of secondary battery |
| KR100303828B1 (en) * | 1998-09-22 | 2001-10-19 | 김순택 | Secondary battery |
-
1999
- 1999-01-25 KR KR10-1999-0002195A patent/KR100528898B1/en not_active IP Right Cessation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06150971A (en) * | 1992-10-30 | 1994-05-31 | Sony Corp | Cylindrical nonaqueous electrolyte secondary battery |
| KR100303828B1 (en) * | 1998-09-22 | 2001-10-19 | 김순택 | Secondary battery |
| KR20000051443A (en) * | 1999-01-22 | 2000-08-16 | 김순택 | Electrode roll of secondary battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9748597B2 (en) | 2014-09-15 | 2017-08-29 | Samsung Electronics Co., Ltd. | Flexible electrode assembly and electrochemical device including the electrode assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20000051639A (en) | 2000-08-16 |
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