KR20160028726A - Secondary battery - Google Patents

Secondary battery Download PDF

Info

Publication number
KR20160028726A
KR20160028726A KR1020140117600A KR20140117600A KR20160028726A KR 20160028726 A KR20160028726 A KR 20160028726A KR 1020140117600 A KR1020140117600 A KR 1020140117600A KR 20140117600 A KR20140117600 A KR 20140117600A KR 20160028726 A KR20160028726 A KR 20160028726A
Authority
KR
South Korea
Prior art keywords
active material
unit
secondary battery
protection member
negative electrode
Prior art date
Application number
KR1020140117600A
Other languages
Korean (ko)
Other versions
KR101741302B1 (en
Inventor
김영수
이관수
류덕현
Original Assignee
주식회사 엘지화학
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 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to KR1020140117600A priority Critical patent/KR101741302B1/en
Publication of KR20160028726A publication Critical patent/KR20160028726A/en
Application granted granted Critical
Publication of KR101741302B1 publication Critical patent/KR101741302B1/en

Links

Images

Classifications

    • 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

The present invention relates to a secondary battery which can prevent cracks on a negative foil unit of a circular-type battery. The secondary battery includes: a positive electrode unit of an electrode assembly; a one-side negative electrode foil unit which is arranged on one side of the positive electrode unit to form a one-side uncoated unit having one or more sides of both sides which are not coated with an active material; a the-other-side negative electrode foil unit which is arranged on the other side of the positive electrode unit to form a the-other-side uncoated unit having one or more sides of both sides which are not coated with an active material; a first protection member which is arranged on the one-side uncoated unit; and a second protection member which is arranged on the other-side uncoated unit.

Description

2차 전지{SECONDARY BATTERY}Secondary Battery {SECONDARY BATTERY}

본 발명은 2차 전지에 관한 것으로서, 보다 자세하게는 원형 타입 전지의 음극 포일부 크랙을 방지할 수 있는 2차 전지에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a secondary battery, and more particularly, to a secondary battery capable of preventing cracks in a cathode foil of a circular type battery.

물질의 물리적 반응이나 화학적 반응을 통해 전기에너지를 생성시켜 외부로 전원을 공급하게 되는 전지(cell, battery)는 각종 전기전자 기기로 둘러싸여 있는 생활환경에 따라, 건물로 공급되는 교류 전원을 획득하지 못할 경우나 직류전원이 필요할 경우 사용하게 된다.Cells and batteries that generate electrical energy through the physical reaction or chemical reaction of a material and supply power to the outside can not acquire the AC power supplied to the building depending on the living environment surrounded by various electric and electronic devices Or when DC power is needed.

이와 같은 전지 중에서 화학적 반응을 이용하는 화학전지인 일차전지와 이차전지가 일반적으로 많이 사용되고 있는데, 일차전지는 건전지로 통칭되는 것으로 소모성 전지이다. 또한, 이차전지는 전류와 물질 사이의 산화환원과정이 다수 반복 가능한 소재를 사용하여 제조되는 재충전식 전지로서, 전류에 의해 소재에 대한 환원반응이 수행되면 전원이 충전되고, 소재에 대한 산화반응이 수행되면 전원이 방전되는데, 이와 같은 충전-방전이 반복적으로 수행되면서 전기가 생성되게 된다.Among such cells, a primary cell and a secondary cell, which are chemical cells using a chemical reaction, are generally used. A primary cell is a consumable cell which is collectively referred to as a dry cell. Also, a secondary battery is a rechargeable battery in which a redox process between a current and a substance is repeatedly manufactured using a material capable of repeatedly repeating. When a reduction reaction is performed on a material by current, the power source is charged, When the power is discharged, the power is discharged. Such charging-discharging is repeatedly performed to generate electricity.

한편, 이차 전지 중 리튬 이온 전지는 양극 도전 포일과 음극 도전 포일에 각각 활물질을 일정한 두께로 코팅하고, 상기 양 도전 포일 사이에는 분리막이 개재되도록 하여 대략 젤리 롤(jelly roll) 내지는 원통 형태로 다수 회 권취하여 제작한 전극 조립체를 원통형 또는 각형 캔, 파우치 등에 수납하고 이를 밀봉 처리하여 제작된다. In a lithium ion battery of a secondary battery, an active material is coated on a positive electrode conductive foil and a negative electrode conductive foil to have a predetermined thickness, and a separation membrane is interposed between the positive and negative electrode foils, thereby forming a jelly roll or a cylindrical shape. The electrode assembly produced by winding is housed in a cylindrical or square can, a pouch, or the like, and sealed.

대한민국공개특허공보 제10-2007-0097152호에는 종래의 젤리롤형 전극 조립체 및 이를 가지는 이차 전지가 개시되어 있다.Korean Patent Laid-Open No. 10-2007-0097152 discloses a conventional jelly-roll type electrode assembly and a secondary battery having the same.

이와 같은 종래의 젤리롤형 전극 조립체를 갖는 원형 타입 전지는 충전 및 방전 시 스웰링(swelling) 현상으로 젤리롤형 전극 조립체가 수축 및 팽창을 반복하게 된다.In the conventional type battery having the conventional jelly roll type electrode assembly, the jelly roll type electrode assembly repeatedly shrinks and expands due to a swelling phenomenon during charging and discharging.

전극 팽창 시 젤리롤형 전극 조립체 외곽의 음극 무지부(활물질 미 코팅 영역 및 음극 탭 융착 부분) 포일(foil)부에 응력(stress)이 가해져 음극 포일부에 크랙(crack)이 발생한다는 문제점이 있다.There is a problem that a stress is applied to the foil portion of the cathode uncoated portion (the uncoated portion of the active material and the fused portion of the negative electrode) outside the jelly roll type electrode assembly at the time of electrode expansion, thereby causing a crack in the cathode foil portion.

음극 포일부에 크랙이 발생할 시 전자 이동 통로가 줄어들어 셀 저항이 증가하며, 이는 수명 특성 및 고율 충전 및 방전 특성에 악영향을 주는 문제점이 있다.When a crack occurs in a part of the cathode foil, the electron transfer path is reduced and the cell resistance is increased, which has a problem of adversely affecting lifetime characteristics and high rate charge and discharge characteristics.

또한, 크랙이 심할 시 음극 포일에 완전 단선이 발생할 수 있으며, 완전 단선이 발생할 시 음극을 형성하는 음극 탭 부분이 차단되어 셀 자체의 기능을 상실하게 되는 문제점이 있다.In addition, when the crack is severe, the cathode foil may be completely disconnected, and when the cathode is completely disconnected, the anode tab portion forming the cathode is blocked to lose the function of the cell itself.

따라서 본 발명은 위와 같은 문제점들을 해결하기 위해 안출된 것으로서, 본 발명의 과제는 음극 포일부 위 및 아래로 보호 부재를 부착하여 음극 포일부의 크랙을 방지할 수 있는 2차 전지를 제공하는 것이다.SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a secondary battery capable of preventing cracks in a portion of a negative electrode by attaching a protective member to portions above and below a negative electrode.

본 발명에 따른 2차 전지는 전극 집합체의 양극부, 상기 양극부의 일측에 마련되며 양측면 중 어느 한 면 이상에는 활물질이 도포 되지 않는 일측 무지부가 형성되는 일측 음극 포일부, 상기 양극부의 타측에 마련되며 양측면 중 어느 한 면 이상에는 활물질이 도포 되지 않는 타측 무지부가 형성되는 타측 음극 포일부, 상기 일측 무지부에 마련되는 제1 보호부재 및 상기 타측 무지부에 마련되는 제2 보호부재를 포함하는 것을 특징으로 한다.The secondary battery according to the present invention is characterized in that the secondary battery comprises a positive electrode portion of the electrode assembly, a negative electrode foil portion provided on one side of the positive electrode portion and having one uncoated portion coated with no active material on either side thereof, And a second protection member provided on the one uncoated portion and a second protective member provided on the other uncoated portion. .

상기 제1 보호부재는 상기 일측 무지부의 상기 양극부와 대향하는 면에 마련되는 것을 특징으로 한다.And the first protection member is provided on a surface of the one uncoated portion facing the anode portion.

상기 제2 보호부재는 상기 타측 무지부의 상기 양측부와 대향하는 면에 마련되는 것을 특징으로 한다.And the second protective member is provided on a surface facing the both side portions of the second uncoated portion.

상기 일측 음극 포일부의 적어도 일부 영역에는 활물질이 도포되며, 상기 제1 보호부재는 상기 활물질이 도포된 부위로부터 이격되게 마련되는 것을 특징으로 한다.An active material is applied to at least a part of the one side cathode foil part, and the first protection member is spaced apart from the part to which the active material is applied.

상기 타측 음극 포일부의 적어도 일부 영역에는 활물질이 도포되며, 상기 제2 보호부재는 상기 활물질이 도포 된 부위로부터 이격되게 마련되는 것을 특징으로 한다.An active material is applied to at least a part of the other cathode foil part, and the second protection member is spaced apart from a part to which the active material is applied.

본 발명에 따르면, 양극부의 일측 음극 포일부와 타측 음극 포일부에 각각 보호부재를 부착하여 장수명 및 고율 특성을 필요로 하는 전지의 음극 포일부의 크랙을 방지하여 안정성을 높이는 효과가 있다.According to the present invention, it is possible to prevent the cracks of the cathode foil part of the battery requiring long-life and high-rate characteristics by attaching a protective member to one cathode part and cathode part of the anode part of the anode part, respectively.

도 1은 본 발명의 일 실시예에 따른 2차 전지를 도시한 구성도이다.FIG. 1 is a configuration diagram illustrating a secondary battery according to an embodiment of the present invention.

이하에서는 첨부의 도면을 참조하여 본 발명의 바람직한 실시예를 상세하게 설명한다. 그러나 본 발명이 이하의 실시예에 의해 제한되거나 한정되는 것은 아니다.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the following examples.

도 1은 본 발명의 일 실시예에 따른 2차 전지를 도시한 구성도이다.FIG. 1 is a configuration diagram illustrating a secondary battery according to an embodiment of the present invention.

도 1에 도시된 바와 같이, 본 발명의 일 실시예에 따른 2차 전지는 원형 타입 전지 캔 안에 젤리 롤(jelly roll) 형태의 전극 집합체(1)의 양극부(10)와 상기 양극부(10)의 일측에 마련되며 양측면 중 어느 한 면 이상에는 활물질(A)이 도포 되지 않는 일측 무지부(21)가 형성되는 일측 음극 포일부(20)와 상기 양극부(10)의 타측에 마련되며 양측면 중 어느 한 면 이상에는 활물질(A)이 도포 되지 않는 타측 무지부(31)가 형성되는 타측 음극 포일부(30), 상기 일측 무지부(21) 중 상기 양극부(10) 측에 마련되는 제1 보호부재(40) 및 상기 타측 무지부(31) 중 상기 양극부(10) 측에 마련되는 제2 보호부재(50)를 포함한다.1, a secondary battery according to an embodiment of the present invention includes an anode part 10 and a cathode part 10 of a jelly roll type electrode assembly 1 in a circular type battery can, (20) formed on one side of the anode part (10) and on which one side uncoated part (21) is formed on which at least one surface is not coated, and an anode part (20) provided on the other side of the anode part (30) on which the other uncoated portion (31) on which the active material (A) is not to be applied is formed on at least one of the surfaces of the non-coated portion (21) 1 protection member 40 and a second protection member 50 provided on the side of the anode portion 10 out of the other side non-used portions 31.

상기 일측 음극 포일부(20)와 상기 타측 음극 포일부(30)는 적어도 일부 영역에 활물질(A)이 도포된다.The active material (A) is applied to at least a part of the one negative electrode forming part (20) and the other negative electrode forming part (30).

상기 일측, 타측 무지부(21, 31)는 각각 상기 일측, 타측 음극 포일부(30, 40)에서 음극 탭(23)이 융착된 부분이나 활물질(A)이 도포 되지 않은 부분이다.The one and the other uncoated portions 21 and 31 are portions where the negative electrode tabs 23 are welded or the active material A is not applied on the one or the other of the negative electrode can portions 30 and 40.

상기 제1, 제2 보호부재(40, 50)는 상기 일측 및 타측 무지부(21, 31)에 크랙(crack)이 발생하는 것을 방지하기 위한 것이다.The first and second protective members 40 and 50 are for preventing cracks from being generated in the first and second uncoated portions 21 and 31.

즉, 젤리 롤 형태의 전극 집합체(1)는 충전 및 방전 시 스웰링(swelling) 현상으로 수축 및 팽창을 반복하는데, 팽창 시 전극 집합체(1)의 외곽에 위치한 상기 일측 및 타측 무지부(21, 31)에 응력(stress)이 가해져 크랙이 발생하게 된다.That is, the jelly roll type electrode assembly 1 repeatedly shrinks and expands due to a swelling phenomenon during charging and discharging. In the expansion, the one and the other unoccupied portions 21, 21 located on the outer periphery of the electrode assembly 1, 31 are subjected to stress and cracks are generated.

따라서, 상기 양극부(10) 일측에 마련되는 상기 일측 음극 포일부(20)의 일측 무지부(21)에 제1 보호부재(40)를 접착시키고, 상기 양측부(10) 타측에 마련되는 상기 타측 음극 포일부(30)의 타측 무지부(31)에 제2 보호부재(50)를 접착시켜서 상기 일측 및 타측 무지부(21, 31)에서 발생할 수 있는 크랙을 방지하게 한다.The first protection member 40 is attached to one of the uncoated portions 21 of the one side cathode foil portion 20 provided at one side of the anode portion 10, The second protection member 50 is adhered to the other uncoated portion 31 of the other negative electrode forming portion 30 so as to prevent cracks which may occur in the one and the other uncoated portions 21 and 31.

여기서 상기 제1 ,제2 보호부재(40, 50)는 접착되는 보호 테이프일 수 있다.Here, the first and second protective members 40 and 50 may be a protective tape to be bonded.

그리고 상기 제1 보호부재(40)의 길이는 상기 일측 무지부(21)의 길이 보다 짧게 형성되며, 상기 제2 보호부재(50)의 길이는 상기 타측 무지부(31)의 길이 보다 짧게 형성되어 상기 제1 보호부재(40)는 상기 일측 무지부(21)에 도포 된 활물질(A)과 겹쳐지지 않도록 거리를 갖게 하고 상기 제2 보호부재(50)는 상기 타측 무지부(31)에 도포 된 활물질(A)과 겹쳐지지 않도록 거리를 갖게 하는 것이 좋다.The length of the first protective member 40 is shorter than the length of the one uncoated portion 21 and the length of the second protective member 50 is shorter than the length of the other uncoated portion 31 The first protective member 40 may be spaced apart from the active material A applied to the one uncoated portion 21 and the second protective member 50 may be provided on the other uncoated portion 31, It is preferable to have a distance so as not to overlap the active material (A).

또한, 상기 제1 보호부재(40)의 두께는 상기 일측 무지부(21)의 두께보다 같거나 작게 형성되고, 상기 제2 보호부재(50)의 두께는 상기 타측 무지부(31)의 두께보다 같거나 작게 형성되어 상기 전극 집합체(1)의 부피가 너무 커지지 않도록 하는 것이 좋다.
The thickness of the first protective member 40 may be equal to or less than the thickness of the first uncoated portion 21 and the thickness of the second protective member 50 may be less than the thickness of the second uncoated portion 31. [ So that the volume of the electrode assembly 1 is not excessively increased.

상술한 바와 같이 구성된 본 발명에 따른 2차 전지는 양극부의 일측 음극 포일부와 타측 음극 포일부에 각각 보호부재를 부착하여 장수명 및 고율 특성을 필요로 하는 전지의 음극 포일부의 크랙을 방지하여 안정성을 높이는 효과가 있다.
The secondary battery according to the present invention is constructed as described above, in which a protective member is attached to each of a negative electrode foil portion on one side and a negative electrode foil portion on the other side of the positive electrode portion to prevent cracks in the negative electrode foil portion of the battery, .

이상과 같이 본 발명에 따른 2차 전지를 예시된 도면을 참고하여 설명하였으나, 본 발명은 이상에서 설명된 실시예와 도면에 의해 한정되지 않으며, 특허청구범위 내에서 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자들에 의해 다양한 수정 및 변형이 가능하다.As described above, the secondary battery according to the present invention has been described with reference to the drawings. However, the present invention is not limited to the above-described embodiments and drawings, It will be understood by those skilled in the art that various changes and modifications may be made.

1: 전극 집합체
10: 양극부
20: 일측 음극 포일부
21: 일측 무지부
23: 음극 탭
30: 타측 음극 포일부
31: 타측 무지부
40: 제1 보호부재
50: 제2 보호부재
A: 활물질1: electrode assembly
10: anode part
20: One side cathode foil part
21:
23: Negative electrode tab
30: cathode part of the other side
31:
40: first protection member
50: second protection member
A: Active material

Claims (5)

전극 집합체(1)의 양극부(10);
상기 양극부(10)의 일측에 마련되며 양측면 중 어느 한 면 이상에는 활물질(A)이 도포 되지 않는 일측 무지부(21)가 형성되는 일측 음극 포일부(20);
상기 양극부(10)의 타측에 마련되며 양측면 중 어느 한 면 이상에는 활물질(A)이 도포 되지 않는 타측 무지부(31)가 형성되는 타측 음극 포일부(30);
상기 일측 무지부(21)에 마련되는 제1 보호부재(40); 및
상기 타측 무지부(31)에 마련되는 제2 보호부재(50); 를 포함하는 것을 특징으로 하는 2차 전지.An anode part (10) of the electrode assembly (1);
A negative electrode foil part 20 provided on one side of the positive electrode part 10 and having a non-coated part 21 on one side of both sides thereof on which no active material A is applied;
A second negative electrode foil portion 30 provided on the other side of the anode portion 10 and having the other uncoated portion 31 on which at least one of the both side surfaces thereof is not coated with the active material A;
A first protection member (40) provided on the unilayered portion (21); And
A second protection member (50) provided on the other non-printed portion (31); And a secondary battery. 청구항 1에 있어서,
상기 제1 보호부재(40)는 상기 일측 무지부(21)의 상기 양극부(10)와 대향하는 면에 마련되는 것을 특징으로 하는 2차 전지.The method according to claim 1,
Wherein the first protection member (40) is provided on a surface of the one side solid portion (21) opposite to the anode portion (10). 청구항 1에 있어서,
상기 제2 보호부재(50)는 상기 타측 무지부(31)의 상기 양측부(10)와 대향하는 면에 마련되는 것을 특징으로 하는 2차 전지.The method according to claim 1,
Wherein the second protection member (50) is provided on a surface of the other non-printed portion (31) opposite to the opposite side portions (10). 청구항 1에 있어서,
상기 일측 음극 포일부의 적어도 일부 영역에는 활물질(A)이 도포되며,
상기 제1 보호부재(40)는 상기 활물질(A)이 도포된 부위로부터 이격되게 마련되는 것을 특징으로 하는 2차 전지.The method according to claim 1,
The active material (A) is applied to at least a part of the one side cathode foil portion,
Wherein the first protective member (40) is provided to be spaced apart from a portion to which the active material (A) is applied. 청구항 1에 있어서,
상기 타측 음극 포일부의 적어도 일부 영역에는 활물질(A)이 도포되며,
상기 제2 보호부재(50)는 상기 활물질(A)이 도포 된 부위로부터 이격되게 마련되는 것을 특징으로 하는 2차 전지.The method according to claim 1,
The active material (A) is applied to at least a part of the other cathode can part,
Wherein the second protective member (50) is spaced apart from a portion to which the active material (A) is applied.
KR1020140117600A 2014-09-04 2014-09-04 Secondary battery KR101741302B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140117600A KR101741302B1 (en) 2014-09-04 2014-09-04 Secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140117600A KR101741302B1 (en) 2014-09-04 2014-09-04 Secondary battery

Publications (2)

Publication Number Publication Date
KR20160028726A true KR20160028726A (en) 2016-03-14
KR101741302B1 KR101741302B1 (en) 2017-05-29

Family

ID=55541487

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140117600A KR101741302B1 (en) 2014-09-04 2014-09-04 Secondary battery

Country Status (1)

Country Link
KR (1) KR101741302B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD915315S1 (en) * 2018-11-14 2021-04-06 Giga-Byte Technology Co., Ltd. Display device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220016554A (en) * 2020-08-03 2022-02-10 주식회사 엘지에너지솔루션 Electrode assembly including disconnection preventing layer and method for manufacturing the same
WO2024080604A1 (en) * 2022-10-12 2024-04-18 주식회사 엘지에너지솔루션 Jelly-roll type electrode assembly and secondary battery comprising same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002042881A (en) * 2000-07-27 2002-02-08 Sony Corp Device and method for sticking tape
JP2006260904A (en) * 2005-03-16 2006-09-28 Sony Corp Winding type battery and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD915315S1 (en) * 2018-11-14 2021-04-06 Giga-Byte Technology Co., Ltd. Display device

Also Published As

Publication number Publication date
KR101741302B1 (en) 2017-05-29

Similar Documents

Publication Publication Date Title
KR101684283B1 (en) Jelly-roll type electrode assembly
WO2019103470A3 (en) All-solid-state secondary battery and method of charging the same
KR101792572B1 (en) Battery Cell Having Electrode Coated with Insulating Material
KR101664244B1 (en) Method forming electrode surface pattern and the electrode manufactured by the method and secondary battery including the same
KR20160049713A (en) Secondary battery and manufacturing process for the same
KR101741302B1 (en) Secondary battery
KR20150084270A (en) Manufacturing method of lithium secondary battery
KR20170082819A (en) Secondary battery
JP2013093238A (en) Nonaqueous electrolyte secondary battery
KR102028741B1 (en) Cylindrical secondary battery and method of manufacturing for the same
KR20200141859A (en) Electrode-assembly and manufacturing method thereof
KR101991934B1 (en) Electrode and manufacturing method for the electrode
KR102005415B1 (en) Secondary battery
KR20160041645A (en) Jelly roll type electrode assembly for secondary battery
US20160043358A1 (en) Secondary battery
US9728786B2 (en) Electrode having active material encased in conductive net
US11476468B2 (en) Electrode, electrode assembly and method for manufacturing the same
KR20200070895A (en) Electrode assembly and secondary battery therewith the electrode assembly and battery pack therewith the secondary battery
KR20170021213A (en) Manufacturing method for secondary battery
KR102245118B1 (en) Secondary battery
KR20150083633A (en) Jelly-roll electrode assembly and lithium secondary battery including the same
KR102048763B1 (en) Secondary battery
KR102080710B1 (en) Electrode assembly
KR102052003B1 (en) Electrode assembly
KR102414194B1 (en) Secondary battery module

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment
X701 Decision to grant (after re-examination)
GRNT Written decision to grant