WO2016208909A1 - 이차전지용 전극조립체 및 그의 제조방법 - Google Patents
이차전지용 전극조립체 및 그의 제조방법 Download PDFInfo
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- WO2016208909A1 WO2016208909A1 PCT/KR2016/006418 KR2016006418W WO2016208909A1 WO 2016208909 A1 WO2016208909 A1 WO 2016208909A1 KR 2016006418 W KR2016006418 W KR 2016006418W WO 2016208909 A1 WO2016208909 A1 WO 2016208909A1
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- electrode
- folded
- separator
- secondary battery
- electrode assembly
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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
- H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with 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
- H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
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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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- 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
Definitions
- the present invention relates to an electrode assembly for a secondary battery and a method of manufacturing the same, and more particularly, to a secondary battery electrode assembly and a method of manufacturing the same, by combining folded first and second electrodes with a folded separator and simplifying the structure of the electrode assembly.
- a secondary battery refers to a battery that can be charged and discharged, unlike a primary battery that cannot be charged.
- Such a secondary battery is widely used in advanced electronic devices such as phones, notebook computers, and camcorders.
- the secondary battery according to the related art includes an electrode assembly including a positive electrode, a separator, and a negative electrode, and a case in which an electrolyte solution is accommodated together with the electrode assembly.
- the secondary battery according to the prior art has a large additional cost due to the expansion of the production line, in particular, there is a limit to increase the productivity due to the problem of the installation space.
- an object of the present invention is to improve the method of manufacturing the electrode assembly to increase the productivity, the electrode assembly of the secondary battery without the need for additional production line expansion and its manufacture To provide a method.
- the electrode assembly for a secondary battery comprises: first and second electrode sheets folded at both ends; And a basic unit folded a plurality of times, the first electrode sheet being inserted into and coupled to an upper folded portion, and having a first separation membrane to which the second electrode sheet is inserted into and coupled to a lower folded portion.
- the first electrode, the first separator, the second electrode, the first separator, the first electrode, and the first electrode are formed by cutting the folded portions of the first and second electrode sheets to form two completely separated first electrodes and two second electrodes.
- the first separator and the second electrode may be sequentially stacked.
- an electrode assembly for a secondary battery includes first and second electrode sheets folded at both ends thereof; And a basic unit having a first separation membrane which is folded a plurality of times, and the first electrode sheet is inserted into and coupled to an upper folded portion, and the second electrode sheet is inserted into and coupled to a lower folded portion.
- the first electrode, the first separator, the second electrode, the first separator, and the first electrode are formed by cutting a part of the folded portions of the first and second electrode sheets to form two first electrodes and two second electrodes connected to each other.
- the first separator and the second electrode may be sequentially stacked.
- the first electrode sheet includes a first electrode portion formed on an unfolded portion and coated with a first electrode active material, and a first uncoated portion formed on the folded portion and without a first electrode active material, wherein the first electrode sheet includes: By folding the first site portion, it may be divided into two first electrode portions.
- the first uncoated portion may be used as the first electrode tab while extending to the outside of the folded portion.
- a flat surface without the first electrode active material may be formed at the front end of the first electrode part.
- the second electrode sheet includes a second electrode portion formed on an unfolded portion and coated with a second electrode active material, and a second uncoated portion formed on the folded portion and without a second electrode active material. By folding the second site portion, it may be divided into two second electrode portions.
- the second uncoated portion extends outward from the folded portion of the second separator and may be used as the second electrode tab of the second electrode.
- a flat surface without the second electrode active material may be formed at the tip of the second electrode portion.
- the basic unit may be provided in plurality, and a second separator may be interposed between the plurality of basic units.
- the second separator may be larger than the basic unit.
- first or second electrode tabs may be disposed on the same side, and the same first or electrode tabs may be welded and fixed.
- the method for manufacturing an electrode assembly for secondary batteries (a) by coating the first and second electrode active material on both sides of both end portions in a state of leaving a plain portion in the center of the first and second Preparing an electrode sheet; (b) folding the uncoated portion such that the first or second electrode active material coated on both ends of the first or second electrode sheet prepared in step (a) overlaps; (c) folding the first separator twice; (d) assembling the first electrode sheet by inserting the first electrode sheet into the upper folded portion of the first separator folded in step (c), and inserting the second electrode sheet into the lower folded portion to assemble the basic unit as an unfinished product; (e) cutting the first and second non-coated portions of the basic unit which is an unfinished product in step (d) to form first and second electrode tabs, thereby manufacturing a basic unit which is a finished product.
- the first and second electrode active materials may be coated in a state in which a plain portion is further left at both ends together with the center of the first and second electrode sheets.
- the first or second uncoated portion folded in the step (d) may be located outside without being coupled to the folded portion of the first separator.
- the folded portion of the first or second plain portion is completely cut in the width direction to be separated into two first electrodes or two second electrodes, and the cut first or second plain portion is formed of the first or second portion. It can be used as a second electrode tab.
- a part of the folded portion of the first or second uncoated portion is cut in the width direction and separated into two first electrodes or two second electrodes connected by the first or second uncoated portion, and It can be used as the first or second electrode tab of the first or second uncoated portion.
- the method may further include assembling the electrode assembly by stacking two or more basic units completed in the step (e) with a second separator interposed therebetween.
- step (g) further comprising welding the first and second electrode tabs exposed to the same side of the electrode assembly assembled in step (f) to complete the electrode assembly.
- the first and second plain portions may be cut using a laser.
- the present invention has the following effects.
- the electrode assembly may be configured through the basic unit combining the folded first and second electrode parts and the folded first separator, thereby simplifying the structure of the electrode assembly, thereby increasing productivity of the electrode assembly.
- a multi-layered electrode assembly may be configured by completely cutting or only partially folding the folded first and second uncoated portions of the first and second electrode portions.
- the first and second electrode portions do not need to be combined with the separate electrode tabs, thereby simplifying the structure and reducing the cost.
- Short formation between the corresponding electrodes can be prevented by forming a flat surface at the tip of the first and second electrode portions.
- FIG. 1 is a perspective view showing the expanded basic unit according to the first embodiment of the present invention.
- FIG. 2 is a perspective view showing a folded basic unit according to a first embodiment of the present invention.
- Figure 3 is a perspective view showing the basic unit in a stacked state according to the first embodiment of the present invention.
- FIG. 4 is a cross-sectional view of FIG.
- FIG. 5 is a perspective view showing a basic unit before cutting of the electrode tab according to the first embodiment of the present invention.
- FIG. 6 is a perspective view illustrating a basic unit in which electrode tabs according to a first embodiment of the present invention are formed.
- FIG. 7 is a cross-sectional view of FIG. 6.
- FIG. 8 is a view showing an electrode assembly including a basic unit according to a first embodiment of the present invention.
- FIG. 9 is a view showing a welding state of the electrode tab included in the electrode assembly according to the first embodiment of the present invention.
- FIG. 10 is a flow chart showing a manufacturing method of an electrode assembly according to a first embodiment of the present invention.
- FIG. 11 is a perspective view showing a basic unit according to a second embodiment of the present invention.
- FIG. 12 is a cross-sectional view of FIG.
- FIG. 13 is a view illustrating an electrode assembly including the basic unit of FIG. 12.
- FIG. 14 is a view illustrating a welding state of electrode tabs included in an electrode assembly according to a second exemplary embodiment of the present invention.
- the electrode assembly 10 includes a base unit 100, and the base unit 100 is folded to the first electrode sheet 110.
- the folded first separator 130 and the folded second electrode sheet 120 may be coupled to each other.
- the basic unit 100 is folded to a plurality of times with the first and second electrode sheets 110 and 120 folded at both ends thereof, and to the upper folded part 131.
- the first electrode sheet 110 is inserted and coupled to each other, and includes a first separator 130 to which the second electrode sheet 120 is inserted and coupled to the lower folded portion 132.
- the first electrode sheet 110 is manufactured while the first electrode active material is applied to correspond to both the upper and lower surfaces of the electrode current collector, and as illustrated in FIG. 2, the first electrode.
- the active material is folded in half so as to overlap.
- the first electrode sheet 110 is formed on the unfolded portion and the first electrode portion 111 coated with the first electrode active material, and the first uncoated portion 112 formed on the folded portion and without the first electrode active material 112. ), And the first uncoated portion 112 may be used as an electrode tab after manufacturing the basic unit 100.
- the first electrode sheet 110 may be separated into two first electrodes having the first electrode 111 and the first site 112 when the folded portion is cut.
- the second electrode sheet 120 is manufactured while the second electrode active material is applied to correspond to both the upper and lower surfaces of the electrode current collector, and as illustrated in FIG. 2, the second electrode.
- the active material is folded in half so as to overlap.
- the second electrode sheet 120 is formed on the unfolded portion and the second electrode portion 121 coated with the second electrode active material, and the second uncoated portion 122 formed on the folded portion and without the second electrode active material. ), And the second uncoated portion 122 may be used as an electrode tab after the basic unit 100 is manufactured.
- the second electrode sheet 120 may be separated into two second electrodes having the second electrode part 121 and the second site part 122 when the folded portion is cut.
- both ends of the folded first electrode sheet 110 are provided with a flat surface 113 without the first electrode active material, and both ends of the folded second electrode sheet 120 have no second electrode active material. 123 is formed. That is, the flat surfaces 113 and 123 of the first and second electrode sheets 110 and 120 prevent shorts generated when the corresponding end portions of the first and second electrode sheets are joined to each other.
- the first separator 130 is interposed between the first and second electrode sheets 110 and 120, and as shown in FIG. 'The letter is folded in form.
- the first separator 130 is folded in a 'z' shape, and an upper folded part 131 protruding to the right side and a lower folded part 132 protruding to the left side are formed.
- the folded first electrode sheet 110 is closely coupled to the surface 131, and the folded second electrode sheet 120 is closely coupled to the lower folded portion 132.
- the basic unit 100 having such a configuration is coupled to the folded first electrode sheet 110, the folded first separator 130, and the folded second electrode sheet 120.
- the first electrode, the first separator, the second electrode, the first separator, the first electrode, the first separator and the second electrode has a laminated structure sequentially stacked.
- the basic unit 100 cuts the folded portions (the folded portions of the first and second uncoated portions) of the first and second electrode sheets 110 and 120 completely.
- Two separated first electrodes and two second electrodes may be formed, and the first electrode, the first separator, the second electrode, the first separator, the first electrode, the first separator, and the second electrode completely separated therefrom.
- a laminated structure can be provided. That is, the first electrode, the first separator, and the second electrode may implement a stacked base unit in which multiple stages are stacked.
- the basic unit 100 is formed by extending the folded portions of the first and second plain portions 112 and 122 to the outside, and the extended portions are formed into the first and the first portions. It may be used as the two electrode tabs 112a and 122a.
- the cutting portions are sawtooth-shaped so as to protrude.
- the protruding portion is used as the first and second electrode tabs 112a and 122a.
- first and second plain portions 112 and 122 may be cut by using a laser, and the first and second plain portions 112 and 122 may be cut by a uniform cutting surface.
- the electrode assembly 10 according to the present invention may be provided by stacking a plurality of basic units 100.
- the electrode assembly 10 includes a plurality of basic units 100 and a plurality of basic units 100 that are stacked in multiple stages. And a second separator 200 interposed therebetween.
- the basic unit 100 has the same configuration and function as the basic unit described above, and description thereof will be omitted.
- the electrode assembly 10 may implement the stacked electrode assembly 10 by stacking the plurality of basic units 100 and the second separator 200.
- the first or second electrode tabs 112a and 122a are disposed on the same side, and the same first or electrode tab ( The fixing force is increased by welding 112a) 122a.
- the second separation membrane 200 is formed larger than the base unit 100, to prevent the occurrence of a short by preventing the bonding of the base unit 100 correspondingly located relative to the second separation membrane 200.
- the first electrode may be a cathode and the second electrode may be an anode.
- the opposite may be true.
- the base unit may be manufactured by sequentially stacking a first electrode, a first separator, a second electrode, a first separator, a first electrode, a first separator, and a second electrode.
- the first or second electrode active material is coated to correspond to both the upper and lower surfaces of the electrode current collector to manufacture the first or second electrode sheets 110 and 120.
- the first or second uncoated parts 112 and 122 are formed at the center of the first or second electrode sheets 110 and 120 manufactured as described above, and the first or second uncoated parts 112 and 122 are formed at the center thereof.
- First or second electrode portions 111 and 121 are formed at both sides.
- both ends of the first or second electrode sheets 110 and 120 may form flat surfaces 113 and 123 having no electrode active material.
- step (b) includes first or second electrode portions 111 and 121 coated at both ends of the first or second electrode sheets 110 and 120 manufactured in step (a).
- the first or second plain portions 112 and 122 are folded to overlap. That is, the first or second electrode sheets 110 and 120 are folded in half.
- the step (c) folds the first separator 130 twice in a 'Z' shape. At this time, fold to overlap with the same size. Accordingly, the first separator 13 forms an upper folded portion 131 and a lower folded portion 132.
- the step (d) combines the first electrode sheet 110 folded into the upper folded part 131 of the first separator 130 folded in step (c) to be in close contact with each other.
- the second electrode sheet 120 folded into the folded portion 132 is closely coupled to each other. Then, pressurize in the overlapping direction to assemble the basic unit which is an unfinished product.
- first or second plain portions 112 and 122 folded in step (d) are positioned to extend outward without being coupled to the folded portions 131 and 132 of the first separation membrane 130. That is, the folded first or second plain portions 112 and 122 extend outward from the first separator 130, and the extended portion may be used as an electrode tab later.
- Step (e) is shown in FIGS. 5 and 6, in step (d) the first and second uncoated parts 112 and 122 of the unfinished basic unit is cut into the sawtooth shape to the first and the first 2 electrode tabs 112a and 122a are formed, and the basic unit 100 is completed.
- step (e) the folded portions of the first or second plain portions 112 and 122 are completely cut in the width direction and separated into two first electrodes or two second electrodes, and the basic unit is a finished product. 100 is completed.
- the protruding portion of the cut first or second uncoated portions 112 and 122 is used as the first or second electrode tabs 112a and 122a.
- first and second plain portions 112 and 122 are cut using a laser, thereby obtaining a uniform cut.
- the basic unit 100 completed as described above has a structure in which a first electrode, a first separator, a second electrode, a first separator, a first electrode, a first separator, and a second electrode are sequentially stacked.
- Step (f) refers to FIG. 8, and the electrode assembly 10 is assembled by stacking two or more basic units 100 completed in step (e) with the second separator 200 interposed therebetween.
- step (g) the first and second electrode tabs 112a and 122a exposed to the same side of the electrode assembly 10 assembled in step (f) are welded to complete the electrode assembly 10 as a finished product.
- first and second electrode tabs 112a and 122a are welded using a laser, thereby improving workability and efficiency.
- the electrode assembly 10 for a secondary battery includes a basic unit 100 that folds and then combines the first electrode sheet 110, the first separator 130, and the second electrode sheet 120. Can simplify the structure, thereby reducing the work efficiency and cost.
- the electrode assembly 10 ′ includes a base unit 100 ′, and the base unit 100 ′ has a first end folded to overlap both ends. And second electrode sheets 110 ′ and 120 ′, folded a plurality of times, and the first electrode sheets 110 ′ are coupled to the upper folded portions 131 ′, and the second electrode sheets are connected to the lower folded portions 132. And a first separator 130 'to which the 120' is coupled.
- the basic unit 100 ′ is cut by some of the folded portions of the first and second electrode sheets 110 ′ and 120 ′, and two first electrodes and two second electrodes connected to each other.
- the first electrode, the first separator, the second electrode, the first separator, the first electrode, the first separator and the second electrode are sequentially stacked while making the electrode.
- both end portions of the first and second electrode sheets 110 ′ and 120 ′ except for the center of the folded portion of the first and second uncoated portions 112 ′ and 122 ′ are removed.
- two first electrodes and two second electrodes are formed around the center, and the folded portions of the uncut first and second uncoated parts 112 'and 122' are either first or second electrode tabs. (112a ') and 122a'.
- the electrode assembly 10 ′ according to the second embodiment is interposed between a plurality of basic units 100 ′ provided in plural and stacked in multiple stages, and a plurality of basic units 100 ′. It may include a second separation membrane 200 ′.
- the electrode assembly 10 ′ includes the first or second electrode tab 112a ′ on the same side in the plurality of basic units 100 ′ stacked in multiple stages. ) 122a 'are disposed, and the same first or electrode tabs 112a' and 122a 'are welded and fixed.
- the first and second electrode sheets 110 ′ and 120 ′ are connected to each other by the first or second electrode tabs 112 a ′ and 122 a ′.
- the workability can be improved when welding electrode tabs.
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Abstract
Description
Claims (19)
- 양 단부가 겹쳐지게 접힌 제1 및 제2 전극시트; 및 복수 회 접히고, 상측 접힌부에 상기 제1 전극시트가 끼워져 결합되며, 하측 접힌부에 상기 제2 전극시트가 끼워져 결합되는 제1 분리막을 가지는 기본단위체를 포함하며,상기 기본단위체는 상기 제1 및 제2 전극시트의 접힌 부분을 절단하여 완전히 분리된 2개의 제1 전극과 2개의 제2 전극을 만들면서 제1 전극, 제1 분리막, 제2 전극, 제1 분리막, 제1 전극, 제1 분리막 및 제2 전극이 순차적으로 적층되는 것을 특징으로 하는 이차전지용 전극조립체.
- 양 단부가 겹쳐지게 접힌 제1 및 제2 전극시트; 및 복수 회 접히고, 상측 접힌부에 상기 제1 전극시트가 끼워져 결합되고, 하측 접힌부에 상기 제2 전극시트가 끼워져 결합되는 제1 분리막을 가지는 기본단위체를 포함하며,상기 기본단위체는 상기 제1 및 제2 전극시트의 접힌 부분 중 일부를 절단하여 일부가 연결된 2개의 제1 전극과 2개의 제2 전극을 만들면서 제1 전극, 제1 분리막, 제2 전극, 제1 분리막, 제1 전극, 제1 분리막 및 제2 전극이 순차적으로 적층되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 1 또는 청구항 2에 있어서,상기 제1 전극시트는 접혀지지 않는 부분에 형성되고 제1 전극 활물질이 코팅된 제1 전극부와, 접힌 부분에 형성되고 제1 전극 활물질이 없는 제1 무지부를 포함하며,상기 제1 전극시트는 상기 제1 부지부가 접힘됨으로써 2개의 제1 전극부로 분할되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 3에 있어서,상기 제1 무지부는 접혀진 부분을 외측으로 연장 형성되면서 제1 전극탭으로 사용되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 3에 있어서,상기 제1 전극부의 선단에는 제1 전극 활물질이 없는 무지면이 형성되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 1 또는 청구항 2에 있어서,상기 제2 전극시트는 접혀지지 않는 부분에 형성되고 제2 전극 활물질이 코팅된 제2 전극부와, 접힌 부분에 형성되고 제2 전극 활물질이 없는 제2 무지부를 포함하며,상기 제2 전극시트는 상기 제2 부지부가 접힘됨으로써 2개의 제2 전극부로 분할되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 6 있어서,상기 제2 무지부는 제2 분리막의 접힌 부분으로부터 외측으로 연장 형성되면서 상기 제2 전극의 제2 전극탭으로 사용되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 6에 있어서,상기 제2 전극부의 선단에는 제2 전극 활물질이 없는 무지면이 형성되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 1에 있어서,상기 기본단위체는 복수 개로 마련되고,상기 복수 개의 기본단위체 사이에는 제2 분리막이 개재되는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 9에 있어서,상기 제2 분리막은 상기 기본단위체 보다 크게 형성하는 것을 특징으로 하는 이차전지용 전극조립체.
- 청구항 9에 있어서,상기 다단으로 적층된 복수 개의 기본단위체는 동일한 측 상에 제1 또는 제2 전극탭들이 배치되고, 상기 동일한 제1 또는 전극탭들을 용접하여 고정하는 것을 특징으로 하는 이차전지용 전극조립체.
- (a) 중앙에 무지부를 남겨둔 상태로 양측 단부의 양면에 제1 및 제2 전극활물질을 코팅하여 제1 및 제2 전극시트를 제조하는 단계;(b) 상기 (a)단계에서 제조된 제1 또는 제2 전극시트의 양 단부에 코팅된 제1 또는 제2 전극활물질이 겹쳐지도록 상기 무지부를 접는 단계;(c) 제1 분리막을 두 번 접는 단계;(d) 상기 (c)단계에서 접은 제1 분리막의 상측 접힌 부분에 상기 제1 전극시트를 끼워서 결합하고, 하측 접힌 부분에 상기 제2 전극시트를 끼워서 결합하여 미완제품인 기본단위체를 조립하는 단계;(e) 상기 (d)단계에서 미완제품인 기본단위체의 제1 및 제2 무지부를 절단하여 제1 및 제2 전극탭을 형성하여 완제품인 기본단위체를 제작하는 단계를 포함하며,상기 기본단위체는 제1 전극, 제1 분리막, 제2 전극, 제1 분리막, 제1 전극, 제1 분리막 및 제2 전극이 순차적으로 적층되는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12에 있어서,상기 (a) 단계는 제1 및 제2 전극시트의 중앙과 함께 양측 끝단에 무지부를 더 남겨둔 상태로 제1 및 제2 전극활물질을 코팅하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12에 있어서,상기 (d) 단계에서 접힌 제1 또는 제2 무지부는 제1 분리막의 접힌 부분에 결합되지 않고 외측에 위치하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12에 있어서,상기 (e) 단계는 상기 제1 또는 제2 무지부의 접힌 부분을 폭방향으로 완전히 절단하여 2개의 제1 전극 또는 2개의 제2 전극으로 분리하고, 절단된 제1 또는 제2 무지부는 제1 또는 제2 전극탭으로 사용하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12에 있어서,상기 (e) 단계는 상기 제1 또는 제2 무지부의 접힌 부분을 폭방향으로 일부를 절단하여 제1 또는 제2 무지부에 의해 연결된 2개의 제1 전극 또는 2개의 제2 전극으로 분리하고, 상기 제1 또는 제2 무지부의 제1 또는 제2 전극탭으로 사용하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12 내지 청구항 16 중 어느 하나의 청구항에 있어서,(f) 상기 (e)단계에서 완성된 2개 이상의 기본단위체를 제2 분리막을 개재한 상태로 적층하여 전극조립체를 조립하는 단계를 더 포함하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 17에 있어서,(g) 상기 (f) 단계에서 조립된 전극조립체의 동일한 측방으로 노출된 제1 및 제2 전극탭들을 용접하여 전극조립체를 완성하는 단계를 더 포함하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
- 청구항 12에 있어서,상기 제1 및 제2 무지부는 레이저를 사용하여 절단하는 것을 특징으로 하는 이차전지용 전극조립체 제조방법.
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| JP2017543791A JP6557346B2 (ja) | 2015-06-23 | 2016-06-16 | 二次電池用電極組立体及びその製造方法 |
| US15/548,599 US10797339B2 (en) | 2015-06-23 | 2016-06-16 | Electrode assembly for secondary battery and method for manufacturing the same |
| CN201680011296.4A CN107735896B (zh) | 2015-06-23 | 2016-06-16 | 用于二次电池的电极组件及其制造方法 |
| US16/943,006 US11757124B2 (en) | 2015-06-23 | 2020-07-30 | Electrode assembly for secondary battery and method for manufacturing the same |
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| KR1020150089266A KR101865450B1 (ko) | 2015-06-23 | 2015-06-23 | 이차전지용 전극조립체 및 그의 제조방법 |
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| US16/943,006 Division US11757124B2 (en) | 2015-06-23 | 2020-07-30 | Electrode assembly for secondary battery and method for manufacturing the same |
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| CN110521045A (zh) * | 2017-12-01 | 2019-11-29 | 株式会社Lg化学 | 电极组件和包括该电极组件的电池 |
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| KR102143558B1 (ko) * | 2017-03-20 | 2020-08-12 | 주식회사 엘지화학 | 전극 조립체 및 그 제조방법 |
| KR102582586B1 (ko) | 2018-05-16 | 2023-09-25 | 삼성전자주식회사 | 무지부의 적어도 일부에 노치가 형성된 배터리를 포함하는 전자 장치 |
| KR102622322B1 (ko) * | 2018-06-05 | 2024-01-09 | 삼성전자주식회사 | 배터리 및 이를 포함하는 전자 장치 |
| DE102019202161A1 (de) * | 2019-02-19 | 2020-08-20 | Robert Bosch Gmbh | Verfahren zur Herstellung von Batterieelektroden |
| CN113394373B (zh) * | 2021-06-29 | 2025-02-11 | 深圳市德方纳米科技股份有限公司 | 电芯及其制备方法和电池 |
| CN113394372B (zh) * | 2021-06-29 | 2025-02-11 | 深圳市德方纳米科技股份有限公司 | 电芯及其制备方法和电池 |
| KR102588085B1 (ko) * | 2021-10-15 | 2023-10-12 | 주식회사 루트제이드 | 리튬이차전지용 전극조립체 |
| JP7842113B2 (ja) * | 2021-11-23 | 2026-04-07 | 寧徳時代新能源科技股▲分▼有限公司 | 電極アセンブリ及びその製造方法、電池セル、電池並びに電力消費装置 |
| KR102848105B1 (ko) * | 2022-10-21 | 2025-08-21 | 주식회사 엘지에너지솔루션 | 전극 조립체의 제조 방법 |
| CN119013117A (zh) * | 2022-10-21 | 2024-11-22 | 株式会社Lg新能源 | 制造电极组件的方法 |
| KR20250141520A (ko) * | 2024-03-20 | 2025-09-29 | 삼성에스디아이 주식회사 | 전극 조립체, 전극 조립체의 제조 방법, 및 이차 전지 |
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Also Published As
| Publication number | Publication date |
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| JP2018509736A (ja) | 2018-04-05 |
| US11757124B2 (en) | 2023-09-12 |
| KR20170000257A (ko) | 2017-01-02 |
| KR101865450B1 (ko) | 2018-07-13 |
| US10797339B2 (en) | 2020-10-06 |
| US20200358125A1 (en) | 2020-11-12 |
| US20180241071A1 (en) | 2018-08-23 |
| CN107735896A (zh) | 2018-02-23 |
| CN107735896B (zh) | 2020-04-21 |
| JP6557346B2 (ja) | 2019-08-07 |
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