KR19980051241U - Negative plate of cylindrical secondary battery - Google Patents

Negative plate of cylindrical secondary battery Download PDF

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Publication number
KR19980051241U
KR19980051241U KR2019960064418U KR19960064418U KR19980051241U KR 19980051241 U KR19980051241 U KR 19980051241U KR 2019960064418 U KR2019960064418 U KR 2019960064418U KR 19960064418 U KR19960064418 U KR 19960064418U KR 19980051241 U KR19980051241 U KR 19980051241U
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KR
South Korea
Prior art keywords
negative electrode
electrode plate
secondary battery
cylindrical secondary
plate
Prior art date
Application number
KR2019960064418U
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Korean (ko)
Inventor
김찬수
Original Assignee
손욱
삼성전관 주식회사
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Priority to KR2019960064418U priority Critical patent/KR19980051241U/en
Publication of KR19980051241U publication Critical patent/KR19980051241U/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0431Cells with wound or folded electrodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/04Construction or manufacture in general
    • H01M10/0422Cells or battery with cylindrical casing
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

원통형 이차전지의 캔 내부에 삽입되어 전극부를 형성하는 음극판으로서, 캔과의 접촉저항을 줄여 저항으로 인한 전지 특성 저하를 미연에 방지할 수 있도록 하기 위하여, 소정의 길이를 갖는 금속판 양면으로 음극 활물질의 도포하여 형성됨은 물론, 양극판 및 세퍼레이터와 함께 권선되어 캔 내부에 삽입장착되는 원통형 이차전지의 음극판에 있어서, 상기 캔과 접촉하게 되는 상기 음극판의 끝단부위가 활물질이 도포되지 않은 금속판으로만 이루어진 원통형 이차전지를 제안한다.A negative electrode plate inserted into a can of a cylindrical secondary battery to form an electrode part, and in order to reduce contact resistance with the can so as to prevent degradation of battery characteristics due to resistance, the negative electrode active material is formed on both sides of a metal plate having a predetermined length. In the negative electrode plate of the cylindrical secondary battery that is formed by coating, as well as wound along with the positive electrode plate and the separator and inserted into the can, the cylindrical secondary electrode made of only a metal plate to which the end portion of the negative electrode plate which comes into contact with the can is not coated with an active material. Suggest a battery.

Description

원통형 이차전지의 음극판Negative plate of cylindrical secondary battery

본 고안은 원통형 이차전지의 음극판에 관한 것으로서, 보다 상세하게는 극판의 접촉저항을 감소시키도록 한 원통형 이차전지의 음극판에 관한 것이다.The present invention relates to a negative electrode plate of a cylindrical secondary battery, and more particularly to a negative electrode plate of a cylindrical secondary battery to reduce the contact resistance of the electrode plate.

통상, 이차전지는 그 외형에 따라 크게 원통형과 각형으로 구분되고 있는 바, 이러한 이차전지에서 전극부는 양극판 및 음극판 그리고 이 양극판 사이에 개재되는 세퍼레이터가 포함되어 구성된다.In general, secondary batteries are generally classified into cylindrical and rectangular shapes according to their external shapes. In this secondary battery, an electrode part includes a positive electrode plate and a negative electrode plate, and a separator interposed between the positive electrode plates.

즉, 원통형 이차전지의 경우, 상기 전극부는 상기 구성들이 권선된 형태로 전지의 음극단자를 이루는 캔 내부에 삽입되는 반면, 각형 이차전지에서는 캔 크기에 맞도록 형성된 상기 구성들이 상호 적층된 상태로 캔 내부에 삽입되게 된다.That is, in the case of the cylindrical secondary battery, the electrode portion is inserted into the can forming the negative terminal of the battery in the form of the windings, while in the rectangular secondary battery, the cans are formed in a state in which the components formed to fit the cans are stacked on each other. It will be inserted inside.

한편, 상기한 전극부의 구성에서 캔과 직접 접촉하게 되는 음극판은, 통상 Ni 기판으로 이루어지는 집전체 상에 음극 활물질이 도포되어 형성되는 바, 이 때, 음극 활물질은 상기 집전체 양면 모두에 고르게 도포되게 된다.On the other hand, the negative electrode plate which is in direct contact with the can in the configuration of the electrode portion is usually formed by coating a negative electrode active material on a current collector made of a Ni substrate, wherein the negative electrode active material is evenly applied to both sides of the current collector. do.

도 3은 통상적인 원통형 이차전지를 도시한 단면도로서, 도시된 바와 같이 원통형으로 이루어진 캔(1) 내부에는 전지의 전극부 즉, 음극판(3)과 양극판(5) 그리고 이 사이에 개재되는 세퍼레이터(7)가 권선된 상태를 유지하여 삽입되어 있다.FIG. 3 is a cross-sectional view illustrating a conventional cylindrical secondary battery. As shown in FIG. 3, an inner portion of the can 1 having a cylindrical shape includes an electrode part of the battery, that is, a negative electrode plate 3 and a positive electrode plate 5, and a separator interposed therebetween. 7) is inserted to maintain the wound state.

이 때, 상기 음극판(3)은 상기 캔(1) 내부에 삽입시, 전지의 음극단자를 이루는 캔(1)과 접촉되기 위하여 이 캔(1) 내주면에 밀착하게 되며, 상기 양극판(5)은 전지의 양극단자를 이루는 캡 어셈블리(7)에 양극 탭(9)를 통해 연결되게 된다.In this case, when the negative electrode plate 3 is inserted into the can 1, the negative electrode plate 3 is in close contact with the inner circumferential surface of the can 1 to be in contact with the can 1 forming the negative electrode terminal of the battery. The cap assembly 7 forming the positive terminal of the battery is connected through the positive electrode tab 9.

상기에서 캡 어셈블리(7)는 상기 캔(1)의 상측 개구부에 배치되어 이 캔(1)의 내부가 밀폐되도록 이에 결합되게 된다.In the cap assembly 7 is disposed in the upper opening of the can 1 is coupled to it so that the inside of the can 1 is sealed.

그런데, 상기와 같은 통상의 원통형 이차전지에 있어서는, 상기 음극판과 캔과의 접촉저항이 커서 전지의 특성을 저하시키는 문제점이 있다.By the way, in the conventional cylindrical secondary battery as described above, there is a problem that the contact resistance between the negative electrode plate and the can is large, thereby deteriorating the characteristics of the battery.

이러한 문제점은, 상기 캔과 접촉되는 음극판의 끝단부위가 활물질인데서 기인하게 된다. 즉, 음극단자인 캔은 금속 성분인데 반해, 이에 접촉되는 음극판의 부위는 활물질 성분이기 때문이다.This problem is caused by the end portion of the negative electrode plate in contact with the can is an active material. That is, the can as the negative electrode terminal is a metal component, whereas the portion of the negative electrode plate in contact with the can is an active material component.

이처럼 종래의 원통형 이차전지의 음극판은, 캔과 접촉되는 끝단부위까지에도 활물질을 도포하여 형성되는 관계로 접촉저항으로 인한 전지 특성 저하의 문제점을 초래하고 있는 실정이다.As described above, the negative electrode plate of the conventional cylindrical secondary battery has a problem of deteriorating battery characteristics due to contact resistance because it is formed by applying an active material even to an end portion contacting the can.

따라서, 본 고안은 이와 같은 문제점을 해결하기 위하여 안출된 것으로서, 본 고안의 목적은 캔 내부로 삽입 장착되는 음극판이 캔과의 접촉저항을 줄이도록 함으로써, 전지 특성을 향상시킬 수 있도록 원통형 이차전지의 음극판을 제공함에 있다.Accordingly, the present invention is devised to solve such a problem, and an object of the present invention is to reduce the contact resistance of the negative electrode plate inserted into the can, thereby improving the battery characteristics of the cylindrical secondary battery. In providing a negative electrode plate.

이에, 상기 목적을 실현하기 위하여 본 고안은, 소정의 길이를 갖는 금속판 양면으로 음극 활물질의 도포하여 형성됨은 물론, 양극판 및 세퍼레이터와 함께 권선되어 캔 내부에 삽입장착되는 원통형 이차전지의 음극판에 있어서, 상기 캔과 접촉하게 되는 상기 음극판의 끝단부위가 활물질이 도포되지 않은 금속판으로만 이루어진 원통형 이차전지를 제안한다.Thus, in order to realize the above object, the present invention, in the negative electrode plate of the cylindrical secondary battery that is formed by coating the negative electrode active material on both sides of the metal plate having a predetermined length, as well as wound with the positive electrode plate and the separator and inserted into the can, An end portion of the negative electrode plate which comes into contact with the can is proposed as a cylindrical secondary battery made of only a metal plate not coated with an active material.

도 1은 본 고안에 따른 원통형 이차전지의 음극판을 도시한 사시도이고,1 is a perspective view showing a negative electrode plate of a cylindrical secondary battery according to the present invention,

도 2는 본 고안에 따른 원통형 이차전지의 음극판이 캔 내부에 삽입된 상태를 도시한 평면도이고,2 is a plan view showing a state in which the negative electrode plate of the cylindrical secondary battery according to the present invention is inserted into the can,

도 3은 일반적인 원통형 이차전지를 도시한 단면도이다.3 is a cross-sectional view illustrating a general cylindrical secondary battery.

이하, 본 고안을 명확히 하기 위한 바람직한 실시예를 첨부 도면에 의거하여 설명하도록 한다.Hereinafter, preferred embodiments for clarifying the present invention will be described with reference to the accompanying drawings.

도 1은 본 고안에 따른 원통형 이차전지의 음극판을 도시한 사시도로서, 도시된 바와 같이 상기 음극판(20)은, 통상의 원통형 이차전지 음극판과 마찬가지로 Ni로 이루어지는 금속판(20a) 양면에 음극 활물질(20b)을 도포하여 형성되고 있다.1 is a perspective view showing a negative electrode plate of a cylindrical secondary battery according to the present invention, as shown in the negative electrode plate 20, the negative electrode active material 20b on both sides of the metal plate 20a made of Ni, similar to a typical cylindrical secondary battery negative electrode plate ) Is formed by applying.

이러한 음극판(20)에서 상기 금속판(20a)의 끝단부위(200a)에는 본 고안에 따라 음극 활물질(20b)이 도포되지 않게 되는 바, 여기서 이 금속판(20a)의 끝단부위(200a)은 상기 음극판(20)이 양극판 및 세퍼레이터와 함께 권선되어 캔 내부에 삽입될 때, 캔 내주면에 접촉하게 되는 부위에 해당되는 곳으로서, 그 길이는 0.5∼2mm 사이로 유지되는 것이 바람직하다.In the negative electrode plate 20, the negative electrode active material 20b is not applied to the end portion 200a of the metal plate 20a according to the present invention, where the end portion 200a of the metal plate 20a is the negative plate ( When 20) is wound together with the positive electrode plate and the separator and inserted into the can, it corresponds to a part that comes into contact with the inner circumferential surface of the can, and its length is preferably maintained between 0.5 and 2 mm.

즉, 상기 음극판(20)은, 상기 끝단부위(200a)를 캔 내주면에 지지시키면서 캔 내부에 삽입되게 되는데, 이 때, 상기 끝단부위(200a)는 캔 내주면에 탄성적으로 지지될 수 있도록 하기 위해 도면에서와 같이 일점쇄선으로 도시된 위치로부터 소정의 각도를 유지하여 절곡형성되게 된다.That is, the negative electrode plate 20 is inserted into the can while supporting the end portion 200a on the inner circumferential surface of the can. In this case, the end portion 200a is elastically supported on the inner circumferential surface of the can. As shown in the figure, bending is performed while maintaining a predetermined angle from a position shown by a dashed line.

이에, 상기와 같이 형성되는 상기 음극판(20)은, 도 2에 도시된 바와 같이 캔(22) 내부에 삽입되면서 그 끝단부위(200a)를 상기 캔(22) 내주면에 접촉시키게 된다.(도 2에서는 편의상, 양극판 및 세퍼레이터의 도시를 생략하였음)Thus, the negative electrode plate 20 formed as described above, while being inserted into the can 22 as shown in FIG. 2, the end portion 200a comes into contact with the inner circumferential surface of the can 22 (FIG. 2). For convenience, the illustration of the positive electrode plate and the separator is omitted)

즉, 본 고안에서와 같이 상기 음극판(20)이 캔(22)과 연결되게 되면, 금속으로 이루어지는 캔(22)에 상기 음극판(20)의 금속판(20a)이 상호 접촉되는 결과를 갖게 되므로, 이에 상기 음극판(20)은 전기 전도도가 향상됨은 물론, 상기 캔(22)과의 접촉 저항을 줄일 수 있게 된다.That is, when the negative electrode plate 20 is connected to the can 22 as in the present invention, the metal plate 20a of the negative electrode plate 20 is in contact with the can 22 made of metal. The negative electrode plate 20 may not only improve electrical conductivity, but also reduce contact resistance with the can 22.

이상의 설명을 통해 살펴 본 바와 같이, 본 고안에 의한 원통형 이차전지의 음극판은, 캔과 접촉되는 끝단부위를 캔과 같은 금속성분으로 이루어질 수 있도록 함으로써, 전지 작용시 일어나는 캔과의 접촉 저항을 줄여 자체 특성은 물론, 전지의 전체적인 특성을 향상토록 하는 효과를 갖는다.As described through the above description, the negative electrode plate of the cylindrical secondary battery according to the present invention, by making the end portion in contact with the can be made of a metal component such as the can, thereby reducing the contact resistance with the can occurs during the operation of the battery itself The characteristics, of course, have the effect of improving the overall characteristics of the battery.

Claims (2)

소정의 길이를 갖는 금속판 양면으로 음극 활물질의 도포하여 형성됨은 물론, 양극판 및 세퍼레이터와 함께 권선되어 캔 내부에 삽입장착되는 원통형 이차전지의 음극판에 있어서, 상기 캔(22)과 접촉하게 되는 상기 음극판(20)의 끝단부위(200a)가 활물질(20b)이 도포되지 않은 금속판(20a)으로만 이루어짐을 특징으로 하는 원통형 이차전지의 음극판.In the negative electrode plate of the cylindrical secondary battery which is formed by coating the negative electrode active material on both sides of the metal plate having a predetermined length, and wound together with the positive electrode plate and the separator, and inserted into the can, the negative electrode plate contacting the can 22 ( A negative electrode plate of a cylindrical secondary battery, characterized in that the end portion (200a) of the 20) is made of only a metal plate (20a) is not applied to the active material (20b). 청구항 1에 있어서, 상기 음극판(20)의 끝단부위(200a)는, 소정 각도로 절곡 형성되어 상기 캔(22)에 탄성적으로 지지됨을 특징으로 하는 원통형 이차전지의 음극판.The negative electrode plate of claim 1, wherein the end portion (200a) of the negative electrode plate (20) is bent at a predetermined angle to be elastically supported by the can (22).
KR2019960064418U 1996-12-30 1996-12-30 Negative plate of cylindrical secondary battery KR19980051241U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100749626B1 (en) * 2006-03-16 2007-08-14 삼성에스디아이 주식회사 Secondary battery
KR101879094B1 (en) * 2016-12-23 2018-07-16 주식회사 포스코 Online stirrer for throughput enlargement of powder sample in belt type furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100749626B1 (en) * 2006-03-16 2007-08-14 삼성에스디아이 주식회사 Secondary battery
KR101879094B1 (en) * 2016-12-23 2018-07-16 주식회사 포스코 Online stirrer for throughput enlargement of powder sample in belt type furnace

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WITN Application deemed withdrawn, e.g. because no request for examination was filed or no examination fee was paid