KR100284343B1 - Flock of Electrode in secondary battery - Google Patents
Flock of Electrode in secondary battery Download PDFInfo
- Publication number
- KR100284343B1 KR100284343B1 KR1019990002338A KR19990002338A KR100284343B1 KR 100284343 B1 KR100284343 B1 KR 100284343B1 KR 1019990002338 A KR1019990002338 A KR 1019990002338A KR 19990002338 A KR19990002338 A KR 19990002338A KR 100284343 B1 KR100284343 B1 KR 100284343B1
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- South Korea
- Prior art keywords
- electrode
- secondary battery
- electrodes
- roll
- electrode group
- Prior art date
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- 244000144992 flock Species 0.000 title 1
- 239000011149 active material Substances 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 239000007773 negative electrode material Substances 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910000652 nickel hydride Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
Classifications
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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
-
- 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
- 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
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M4/587—Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
-
- 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
Abstract
목적 : 본 발명은 이차전지의 충전과정에서 전극의 밀착성이 양호하도록 유지할 수 있는 이차전지의 전극군을 제공하는 것이 목적이다.Object: An object of the present invention is to provide an electrode group of a secondary battery capable of maintaining good adhesion of electrodes in a secondary battery charging process.
구성 : 세퍼레이터(22)의 양측에 양극(16)과 음극(10)으로 된 두 전극이 대면되고 평탄부(S)와 곡선부(R)를 갖는 이차전지의 전극군에서, 전극의 어느 하나는 곡선부에서 전극기재의 표면에 활물질이 도포되지 않는 무지부(19)가 배치되는 구조를 제안한다.Composition: In an electrode group of a secondary battery having two electrodes of a positive electrode 16 and a negative electrode 10 facing each other and having a flat portion S and a curved portion R on either side of the separator 22, either of the electrodes The structure which arrange | positions the non-coating part 19 which is not apply | coated an active material on the surface of an electrode base material in a curved part is proposed.
효과 : 활물질이 도포되는 영역에서만 충전에 따른 팽창이 이루어져 세퍼레이터를 사이에 둔 양극과 음극의 밀착성이 좋게 되어 전지의 성능 및 수명이 향상되었다.Effect: Only the area where the active material is applied is expanded according to the charge, and the adhesion between the positive electrode and the negative electrode between the separators is improved, thereby improving the performance and life of the battery.
Description
본 발명은 이차전지의 전극군에 관한 것으로서, 좀 더 상세하게는 권취된 전극군을 사용하는 이차전지의 충전시 전극이 팽창되더라도 세퍼레이터를 사이에 둔 두 전극 간의 밀착성이 양호하도록 한 이차전지의 전극군에 관한 것이다.The present invention relates to an electrode group of a secondary battery, and more particularly, to a secondary battery electrode having good adhesion between two electrodes having a separator therebetween even when the electrode is expanded during charging of the secondary battery using the wound electrode group. It's about the military.
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.
통상의 이차전지는 전극군이 케이스의 내부에 전해물질과 함께 수납되고 케이스의 개구가 밀봉된 구조로 되는데, 상기 전극군은 세퍼레이터의 양측에 양극과 음극이 배치되어 절연된 구조로 된다.A typical secondary battery has a structure in which an electrode group is accommodated together with an electrolytic material in a case and an opening of the case is sealed, and the electrode group has a structure in which an anode and a cathode are disposed on both sides of a separator and insulated.
특히, 도 5에 도시한 바와 같이 전극군을 권취하여 파우치의 내부에 삽입한 형태의 이차전지에서, 전극롤(2)은 세퍼레이터(4)를 사이에 양극(6)과 음극(8)이 배치된 극판군을 권취한 후 압착하여서 평탄부(S)와 곡선부(L)가 형성되도록 한다.In particular, in the secondary battery of the type in which the electrode group is wound and inserted into the pouch as shown in FIG. 5, the electrode roll 2 has the positive electrode 6 and the negative electrode 8 disposed between the separator 4. After winding the electrode plate group is pressed to form a flat portion (S) and the curved portion (L).
이 때, 음극(8)은 양극(6)보다 양이 좀 더 많게 제작되는데, 이것은 양극 활물질로 음극 활물질을 나눈 엔피 비율이 항상 1이상이 되도록 유도하여 전지의 충전시 리튬이온이 양극(6)에서 음극(8)으로 충분히 이동할 수 있는 충전 리저브를 확보하기 위함이다.At this time, the negative electrode 8 is produced in a larger amount than the positive electrode 6, which induces that the ratio of dividing the negative electrode active material into the positive electrode active material is always 1 or more, so that lithium ions are positively charged during battery charging. In order to secure a charging reservoir that can sufficiently move from the negative electrode (8).
이러한 전극롤(2)은 충전과정에서 팽창이 이루어지는데, 평탄부(S)에서는 세퍼레이터(4)를 사이에 두고 두 전극이 동일한 체적으로 되어 충전에 따른 팽창이 전체에서 균일하게 발생되나, 곡선부(R)에서는 중심부에서의 체적이 바깥쪽으로 갈수록 증가하게 되어 팽창에 따른 응력이 평탄부(S)에 비해 급격함을 나타낸다.The electrode roll 2 is expanded during the charging process. In the flat part S, the two electrodes are the same volume with the separator 4 interposed therebetween, so that the expansion due to the charging occurs uniformly in the entirety. In (R), the volume at the center portion increases toward the outside, indicating that the stress due to expansion is more sharp than that of the flat portion (S).
근데, 세퍼레이터를 사이에 둔 두 전극은 밀착된 상태에서 가장 좋은 충방전 성능을 발휘하나 전술한 바와 같이 평탄부와 곡선부에서의 팽창율이 다름에 따라 세퍼레이터의 전극이 밀착되지 못하고 풀려져 전지의 성능과 수명이 저하되는 것이다.However, the two electrodes between the separators show the best charge / discharge performance when they are in close contact with each other. However, as described above, the electrode of the separator is released from contact with each other due to the difference in expansion rate between the flat part and the curved part. And life will be reduced.
이러한 문제점을 해결하기 위해 안출된 본 발명은 이차전지의 충전과정에서 전극의 밀착성이 양호하도록 유지할 수 있는 이차전지의 전극군을 제공하는 것이 목적이다.The present invention devised to solve this problem is to provide an electrode group of a secondary battery that can maintain the adhesion of the electrode in the charging process of the secondary battery good.
이를 위하여, 전극의 어느 하나는 곡선부에서 전극기재의 표면에 활물질이 도포되지 않는 무지부가 배치되는 구조를 제안한다.To this end, any one of the electrodes proposes a structure in which a non-coating portion that is not coated with the active material is disposed on the surface of the electrode substrate at the curved portion.
여기서, 무지부는 전극의 길이 방향 어느 한 쪽으로 간격이 점차 줄어들게 되고, 활물질은 리튬이 함유되어 음극이 된다.Here, the gap between the uncoated portion gradually decreases toward one side of the electrode, and the active material contains lithium to become a negative electrode.
이와 같은 전극군은 세퍼레이터와 함께 두 전극이 권취된 후 압착되어 전극롤이 형성되고, 전극롤에서 두 전극 중 무지부를 갖는 전극이 나머지 전극보다 더 안쪽에 배치되는 것이다.Such an electrode group is formed by winding two electrodes together with a separator and then compressing them to form an electrode roll, and in the electrode roll, an electrode having a plain portion of the two electrodes is disposed inward of the other electrodes.
특히, 전극롤의 권취 중심부를 봤을 때 평탄부에서 전극기재에 활물질이 도포되며, 이상과 같은 전극롤은 파우치에 삽입될 수 있다.In particular, the active material is applied to the electrode base material in the flat portion when looking at the winding center of the electrode roll, the electrode roll as described above may be inserted into the pouch.
이에 따라, 전극롤의 평탄부에만 활물질이 존재하게 됨으로 전극롤의 충전시 균일한 팽창이 이루어져 전극 사이의 밀착성은 양호하게 되어 전지의 성능을 그대로 유지할 수 있게 된다.As a result, the active material is present only in the flat part of the electrode roll, so that uniform expansion occurs when the electrode roll is filled, and thus the adhesion between the electrodes is good, thereby maintaining the performance of the battery.
도 1은 본 발명에 따른 이차전지의 전극군을 구성하는 음극을 도시한 도면,1 is a view showing a negative electrode constituting an electrode group of a secondary battery according to the present invention;
도 2는 이차전지의 전극군을 구성하는 양극을 도시한 도면,2 is a view showing a positive electrode constituting an electrode group of a secondary battery;
도 3은 이차전지의 전극군을 권취한 전극롤을 도시한 평면도,3 is a plan view showing an electrode roll wound around an electrode group of a secondary battery;
도 4는 본 발명에 따른 실시예가 적용되는 이차전지를 도시한 분해 사시도.4 is an exploded perspective view illustrating a rechargeable battery to which an embodiment according to the present invention is applied.
도 5는 종래 공지된 이차전지의 전극군을 도시한 평면도.5 is a plan view showing an electrode group of a conventionally known secondary battery.
* 도면의 주요 부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10 : 음극12 : 음극기재10: cathode 12: anode base
14 : 음극 활물질16 : 양극14 negative electrode active material 16 positive electrode
18 : 양극기재19 : 무지부18: positive electrode substrate 19: uncoated
20 : 양극 활물질22 : 세퍼레이터20 positive electrode active material 22 separator
24 : 전극롤26 : 양극탭24 electrode roll 26 anode tab
이하 본 발명에 따른 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명하고자 한다. 도 1은 본 발명에 따른 전극군의 일부인 음극을 도시한 도면이고, 도 2는 전극군의 양극을 도시한 도면이며, 도 3은 전극롤을 평면도로 나타내고 있다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 is a view showing a cathode which is part of an electrode group according to the present invention, FIG. 2 is a view showing an anode of an electrode group, and FIG. 3 shows an electrode roll in plan view.
도면 부호 10은 음극으로써 음극기재(12)의 양표면에 일정한 두께로 음극 활물질(14)을 도포한 것이다. 여기서, 음극 활물질(14)은 리튬전지일 경우에 탄소 복합체를 사용하며 슬러리로 제조된 다음 음극기재(12)에 도포한 후 건조와 압연과정을 거쳐 생산된다.Reference numeral 10 denotes a negative electrode, in which a negative electrode active material 14 is coated on both surfaces of the negative electrode substrate 12 at a constant thickness. Here, the negative electrode active material 14 is produced using a carbon composite in the case of a lithium battery, made of a slurry, and then coated on the negative electrode substrate 12 and then dried and rolled.
양극(16)은 본 발명의 특징에 따라 양극기재(18)의 양표면에 일정한 두께로 양극 활물질(20)을 도포하되, 간헐적으로 도포하여 양극 활물질(20)이 도포되는 영역과 그렇지 않은 무지부(19)로 구분한다. 특히, 무지부(19)는 길이 방향으로 일단에서 타단으로 갈수록 그 폭이 점차 좁게 되고, 이렇게 좁은 끝단이 후술하는 전극롤(24)의 중심부에 배치된다.In the positive electrode 16, the positive electrode active material 20 is coated on both surfaces of the positive electrode substrate 18 in a constant thickness according to the characteristics of the present invention, and the areas where the positive electrode active material 20 is applied and the uncoated parts are applied intermittently. It is divided into (19). In particular, the width of the uncoated portion 19 becomes gradually narrower from one end to the other end in the longitudinal direction, and this narrow end is disposed at the center of the electrode roll 24 described later.
상술한 바와 같은 음극(10)과 양극(16)을 2개의 세퍼레이터(22) 사이에 배치하고 권취한 후 압착하면 평탄부(S)와 곡선부(R)를 가지는 전극롤(24)이 형성되고, 전극롤(24)의 가장 바깥쪽에는 음극(10)의 음극기재(12)가 배치되며 그 안쪽으로 세퍼레이터(22)를 사이에 두고 양극(16)이 배치되는 것이다.The electrode roll 24 having the flat portion S and the curved portion R is formed by disposing the cathode 10 and the anode 16 as described above between the two separators 22 and winding and compressing the same. On the outermost side of the electrode roll 24, the negative electrode substrate 12 of the negative electrode 10 is disposed, and the positive electrode 16 is disposed with the separator 22 interposed therebetween.
상기 전극롤(24)은 도면에서 알 수 있듯이 전극롤(24)의 중심부를 기준으로 봤을 때 평탄부(S)에만 각각의 활물질이 도포된 양극(16)과 음극(10)이 세퍼레이터(22)를 사이에 두고 배열되고, 곡선부(R)에서는 활물질이 도포되지 않은 무지부(19)와 음극 활물질(14)이 도포된 음극(10)이 배열되어진다.As shown in the drawing, the electrode roll 24 has a separator 22 having a positive electrode 16 and a negative electrode 10 coated with respective active materials only on the flat portion S when viewed from the center of the electrode roll 24. In the curved portion R, the uncoated portion 19 to which the active material is not coated and the negative electrode 10 to which the negative electrode active material 14 is coated are arranged.
이렇게 제조된 전극롤(24)은 당연히 음극(10)이 차지하는 체적이 많게 되나, 엔피 비율을 고려했을 때 충전 리저브가 확보된 상태임으로 아무런 문제가 되지 않는다.The electrode roll 24 manufactured as described above naturally has a large volume occupied by the negative electrode 10, but it does not cause any problem since the charging reserve is secured in consideration of the enphi ratio.
상기 전극롤(24)의 양극(16)과 음극(10)에는 도 4에 도시한 바와 같이 각각 양극탭(26)과 음극탭(28)을 용접하여 전극롤(24)의 상단 혹은 하단으로 인출한다.As shown in FIG. 4, the positive electrode tab 26 and the negative electrode tab 28 are welded to the positive electrode 16 and the negative electrode 10 of the electrode roll 24 to be drawn out to the top or bottom of the electrode roll 24. do.
이와 같은 전극롤(24)을 파우치(30)로 된 케이스의 내부에 삽입하고 양극탭(26)과 음극탭(28)이 파우치(30)의 외부로 인출되도록 한 상태에서 파우치(30)를 밀봉하여 이차전지를 획득하게 되는 것이다.The electrode roll 24 is inserted into the case made of the pouch 30 and the pouch 30 is sealed while the positive electrode tab 26 and the negative electrode tab 28 are drawn out of the pouch 30. To obtain a secondary battery.
상기 이차전지를 충전하면 전극롤(24)은 팽창하게 되는데, 주로 평탄부(S)에서 세퍼레이터(22)를 사이에 둔 양극(16)과 음극(10)이 팽창되고, 곡선부(R)에서는 팽창이 발생하지 않는다.When the secondary battery is charged, the electrode roll 24 expands, and the positive electrode 16 and the negative electrode 10 having the separator 22 between the flat portion S are expanded, and the curved portion R Expansion does not occur.
따라서, 세퍼레이터(22)를 사이에 둔 두 전극 사이에 밀착성을 유지한 상태로 충전 반응이 이루어져 전지의 성능과 수명을 향상되었다.Therefore, the charging reaction was performed while maintaining the adhesiveness between the two electrodes with the separator 22 interposed therebetween, thereby improving the performance and the life of the battery.
이렇게 얻어진 이차전지는 본 발명에 따른 전극군의 일종인 전극롤을 사용함으로써 종래의 전극롤을 파우치에 삽입하여 사용했던 이차전지에서 발생되던 문제점을 해결하였다.The secondary battery thus obtained solves the problems caused by the secondary battery used by inserting a conventional electrode roll into a pouch by using an electrode roll which is a kind of electrode group according to the present invention.
즉, 종래 전극롤의 곡선부는 전지의 충전과정에서 전극롤의 중심부와 바깥쪽으로 갈수록의 팽창율이 다르기 때문에 전극롤이 파우치 내부에서 풀려지는 문제점이 있었으나, 본 발명의 실시예에서는 전극롤이 파우치의 내부에 삽입되어 충전되더라도 곡선부에 충전 반응에 필요한 양극이 존재하지 않음으로 팽창 자체가 없게 된다.That is, the curved portion of the conventional electrode roll has a problem that the electrode roll is released inside the pouch because the expansion ratio of the electrode roll toward the center and the outside of the electrode during charging process different, but in the embodiment of the present invention the electrode roll is inside the pouch Even if it is inserted into the charging, there is no expansion itself because there is no positive electrode for the charging reaction in the curved portion.
이렇듯, 전극롤의 평탄부에서만 팽창이 되도록 유도함으로써 세퍼레이터를 사이에 둔 양극과 음극 사이의 밀착성이 양호하게 되어 전지의 수명이 향상된다.As such, by inducing expansion only in the flat portion of the electrode roll, the adhesion between the positive electrode and the negative electrode sandwiched between the separators is improved, thereby improving the life of the battery.
Claims (7)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990002338A KR100284343B1 (en) | 1999-01-26 | 1999-01-26 | Flock of Electrode in secondary battery |
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| KR1019990002338A KR100284343B1 (en) | 1999-01-26 | 1999-01-26 | Flock of Electrode in secondary battery |
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| KR20000051739A KR20000051739A (en) | 2000-08-16 |
| KR100284343B1 true KR100284343B1 (en) | 2001-03-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100440929B1 (en) * | 2001-10-16 | 2004-07-21 | 삼성에스디아이 주식회사 | Structure of electrodes for square-shaped secondary cell |
| KR100601559B1 (en) * | 2004-07-28 | 2006-07-19 | 삼성에스디아이 주식회사 | Jelly-roll type electrode assembly and Li Secondary battery with the same |
| KR101352738B1 (en) * | 2011-12-23 | 2014-01-17 | 주식회사 엘지화학 | Jelly-roll type electrode assembly pattern-coated with active material and secondary battery therewith |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100399782B1 (en) * | 2001-03-05 | 2003-09-29 | 삼성에스디아이 주식회사 | Lithium ion Secondary battery including the case of which is a pouch and method for manufacturing the same |
| US8999543B2 (en) | 2009-09-21 | 2015-04-07 | Samsung Sdi Co., Ltd. | Rechargeable battery with larger curved ends having different radius of curvature |
| US8709637B2 (en) | 2009-11-02 | 2014-04-29 | Samsung Sdi Co., Ltd. | Electrode assembly with centrally wound separator member |
| KR101146401B1 (en) * | 2009-11-02 | 2012-05-17 | 삼성에스디아이 주식회사 | Electrode assembly for secondary battery and method of making the electrode assembly |
| KR102484265B1 (en) | 2015-12-22 | 2023-01-02 | 삼성에스디아이 주식회사 | Electrode assembly and secondary battery using for the same |
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1999
- 1999-01-26 KR KR1019990002338A patent/KR100284343B1/en active IP Right Grant
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100440929B1 (en) * | 2001-10-16 | 2004-07-21 | 삼성에스디아이 주식회사 | Structure of electrodes for square-shaped secondary cell |
| KR100601559B1 (en) * | 2004-07-28 | 2006-07-19 | 삼성에스디아이 주식회사 | Jelly-roll type electrode assembly and Li Secondary battery with the same |
| KR101352738B1 (en) * | 2011-12-23 | 2014-01-17 | 주식회사 엘지화학 | Jelly-roll type electrode assembly pattern-coated with active material and secondary battery therewith |
| US9005789B2 (en) | 2011-12-23 | 2015-04-14 | Lg Chem, Ltd. | Jelly-roll type electrode assembly pattern-coated with active material and secondary battery including the same |
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| Publication number | Publication date |
|---|---|
| KR20000051739A (en) | 2000-08-16 |
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