WO2017126921A1 - 박막형 전지 - Google Patents
박막형 전지 Download PDFInfo
- Publication number
- WO2017126921A1 WO2017126921A1 PCT/KR2017/000691 KR2017000691W WO2017126921A1 WO 2017126921 A1 WO2017126921 A1 WO 2017126921A1 KR 2017000691 W KR2017000691 W KR 2017000691W WO 2017126921 A1 WO2017126921 A1 WO 2017126921A1
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- WIPO (PCT)
- Prior art keywords
- negative electrode
- positive electrode
- electrode plate
- insulating film
- separator
- Prior art date
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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
- H01M10/0436—Small-sized flat cells or batteries for portable equipment
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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
- H01M10/052—Li-accumulators
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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
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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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
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
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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
- 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
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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 a thin film battery, and more particularly, to a thin film battery configured to fix a positive electrode plate and a negative electrode plate without using a tape or a binder for fixing the positive electrode plate and the negative electrode plate to each other.
- a thin film type battery means a thin film type battery formed by stacking one or two sheets of a very thin positive electrode plate and a negative electrode plate, and the battery itself has a thickness of about 0.4 to 0.5 mm.
- liquid crystal displays electronic calculators, IC cards, temperature sensors, pressure sensing buzzers or ion photoresist devices for drug delivery, smart credit cards and the like.
- Such a thin-film battery has an advantage that can be applied to a variety of ultra-thin electronic devices such as smart credit cards.
- a thin film type battery has a low battery capacity as a thin film type positive electrode plate and a negative electrode plate are used, and furthermore, due to the pressure caused by internal gas generation, gaps are generated between the electrode plates, thereby degrading battery performance even within a low battery capacity. have.
- the positive electrode plate and the negative electrode plate should be bundled with a tape or fixed, or a binder may be applied to a separator positioned between the positive electrode plate and the negative electrode plate to fix the positive electrode plate and the negative plate.
- the positive electrode plate and the negative electrode plate are prevented from being separated from each other by a tape method of wrapping the positive electrode plate and the negative electrode plate with a tape or by applying an adhesive, such as a binder, to a part of an area of the separator interposed between the positive electrode plate and the negative electrode plate.
- an adhesive such as a binder
- the present invention is to solve the above problems, it is possible to provide a thin film battery that can be fixed or bonded to each other or a thin film type positive electrode plate and negative electrode plate without using a separate binder, adhesive.
- the present invention can provide a thin film battery that can minimize the deterioration of battery performance even when the positive electrode plate and the negative electrode plate are bonded or fixed to each other.
- the positive electrode And a negative electrode body stacked on at least one of upper and lower portions of the positive electrode body, wherein the positive electrode body includes: a positive electrode plate to which a positive electrode active material is coated; A pair of separators covering upper and lower surfaces of the positive electrode plate; And a polymer insulating film part interposed between the pair of separators, wherein a portion of the polymer insulating film part protruding outward from an edge of the separator may be bonded to the negative electrode plate of the negative electrode body.
- the positive electrode body includes a positive electrode tab to which the positive electrode active material is not coated, and the separator covers both surfaces of the positive electrode plate so that the positive electrode tab is exposed to the outside of the separator, and is bonded to the negative electrode plate of the negative electrode body.
- the polymer insulating film part may be formed along the entire length direction or the entire width direction of the positive electrode plate or may be formed on a part of the longitudinal direction or a part of the width direction of the positive electrode plate.
- the sum of the longitudinal length of the separator and the longitudinal length of the polymer insulating film portion exposed outward in the longitudinal direction of the separator may be the same as the longitudinal length of the negative electrode plate.
- the sum of the widthwise length of the separator and the widthwise length of the polymer insulating film portion exposed outward in the widthwise direction of the separator may be equal to the widthwise length of the negative electrode plate.
- the polymer insulating film part may include a part exposed by the separator without being coated with a part covered by the separator, and an edge of a part of the polymer insulating film part exposed by the separator coincides with an edge of the negative electrode body.
- the positive electrode and the negative electrode may be stacked to be stacked.
- edge of the negative electrode body and the edge of the polymer insulating film portion may be formed so that the edges facing each other coincide with each other.
- a portion of the polymer insulating film portion protruding outward from the edge of the separator may be bonded to the negative electrode tab protruding from the negative electrode plate.
- the width of the portion of the polymer insulating film portion protruding outward from the edge of the separator may be formed smaller than the width of the negative electrode tab.
- the polymer insulating film may include an upper layer, an intermediate layer, and a lower layer, wherein the upper layer and the lower layer are formed of ethylene vinyl acetate, and the intermediate layer is formed of polyethylene terephtalate, and the upper layer is formed of polyethylene terephtalate.
- the lower layer may be heated and melted to be bonded to the negative electrode plate of the negative electrode body.
- anode body may be formed of a pocketing anode body.
- the positive electrode and the negative electrode may be fixed or combined with each other while the contact active surfaces of the positive electrode and the negative electrode are kept intact, and thus the battery capacity is maintained as it is. The performance degradation can be prevented.
- the positive electrode and the negative electrode may be fixed or combined with each other without using an adhesive coating agent such as a tape or a binder, it is possible to prevent an increase in material cost or production cost of the battery. .
- the thin film battery according to an embodiment of the present invention does not need to perform a separate operation process of fixing or bonding the positive electrode and the negative electrode to each other, thereby simplifying the production process of the battery and increasing productivity.
- FIG. 1 is an exploded perspective view of a thin film battery according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the thin film battery shown in FIG. 1 as viewed from the A-A 'direction.
- FIG. 2 is a cross-sectional view of the thin film battery shown in FIG. 1 as viewed from the A-A 'direction.
- Figure 3 is a plan view from above of the positive electrode plate and the separator and the polymer insulating film portion according to an embodiment of the present invention.
- FIG. 4 is a view as viewed from above a state in which the positive electrode plate and the separator and the polymer insulating film portion shown in FIG.
- FIG 5 is a plan view of a positive electrode and a negative electrode according to an embodiment of the present invention.
- FIG. 6 is a plan view of a positive electrode and a negative electrode according to another embodiment of the present invention.
- FIGS. 1 to 5 a thin film battery according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5.
- specific descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.
- the thin film battery 100 may include a cathode body 200 and a cathode body 300 stacked on the anode body 200.
- the thin film type battery 100 according to the exemplary embodiment of the present invention may be formed by stacking one positive electrode 200 and one or two negative electrode bodies 300.
- FIG. 1 exemplarily illustrates a thin film battery 100 formed by stacking one positive electrode 200 and two negative electrode bodies 300.
- the positive electrode 200 and the negative electrode 300 may be formed into a thin film having an active material deposited by a known deposition method such as sputtering and having a thickness of 1 mm or less, preferably 0.4 to 0.5 mm. .
- the positive electrode 200 and the negative electrode 300 may be formed in various shapes such as an asymmetric shape as well as a constant shape such as a square, a polygon, a circle, and a coin shape. Accordingly, the thin film battery 100 according to an embodiment of the present invention may be implemented as a thin film battery using various exterior materials such as a square pouch type battery and a coin type battery.
- the positive electrode 200 and the negative electrode 300 of the thin film battery 100 will be described as having a rectangular shape.
- the positive electrode 200 includes a positive electrode plate 210 coated with a coating layer of a lithium or lithium metal composite oxide, which is a positive electrode active material, and a positive electrode formed to protrude from one end of the positive electrode plate 210.
- the pair of separators 230 are coated on both surfaces of the positive electrode plate 210 while exposing only the tab 211, and the pair of separators 230 are disposed at or around the entire surface of the positive electrode plate 210. It may include a polymer insulating film portion 250 which is disposed between and bonded to the pair of separator 230.
- the positive electrode plate 210 may be formed smaller than the size or area of the negative electrode body 300, and both surfaces of the positive electrode plate 210 may be coated with the positive electrode active material or the metal composite oxide.
- the cathode active material is coated on both surfaces of the cathode plate 210 in order to prevent the drawings from being complicated.
- the pair of separators 230 may be larger than the size or area of the positive electrode plate 210, and may cover the remaining portions of the positive electrode plate 210 except for the positive electrode tab 211.
- a punching space S in which the positive electrode plate 210 may be accommodated may be formed in the polymer insulating film part 250.
- the shape of the punching space S may be variously selected corresponding to the shape of the positive electrode plate 210.
- the punching space S may have a rectangular shape. S) is also shown on the figure as having a rectangular shape.
- the punching space S may have a size or area larger than the size or area of the positive electrode plate 210 so that the positive electrode plate 210 may be accommodated in a spaced state. That is, a gap or a gap may be formed between the edge of the positive electrode plate 210 and the polymer insulating film part 250 in a state where the positive electrode plate 210 is accommodated in the punching space S.
- the polymer insulating film part 250 is formed in a rectangular frame shape as a whole to form and describe a punching space S having a rectangular shape, but is not limited thereto. That is, the polymer insulating film part 250 may be formed to surround at least two sides of the positive electrode plate 210. In other words, the polymer insulating film part 250 may be disposed at both sides of the longitudinal side of the positive electrode plate 210 to form a punching space S in which the positive electrode plate 210 may be accommodated. It is disposed on both sides of the width direction side of the positive electrode plate 210 may form a punching space (S) that can accommodate the positive electrode plate 210.
- S punching space
- the polymer insulating film part 250 may be formed of at least three layers.
- the polymer insulating film part 250 may include an upper layer, an intermediate layer, and a lower layer, and the upper layer and the lower layer may be formed of ethylene vinyl acetate (Ethylene-Vinyl Acetate).
- the upper layer and the lower layer are preferably melted by heat and have an adhesive component, so that other materials may be used as well as ethylene vinyl acetate (Ethylene-Vinyl Acetate).
- an adhesive component is applied to the upper and lower layers of the polymer insulating film part 250, and the adhesive component is ethylene vinyl acetate, ethylene ethyl acetate, ethylene acrylic acid compound, ionomer compound, polyethylene, polyvinyl beauty It is preferably any one selected from the group of hot melt adhesive materials consisting of Rahl.
- the intermediate layer of the polymer insulating film part 250 may be formed of polyethylene terephtalate.
- the intermediate layer of the polymer insulating film part 250 is a polyolefin resin film, a polyester resin film, a polyester resin film, a polyimide film, a polyamide film, a fluorocarbon resin film, an ABS film, a polyacrylic series It is preferably formed of any one selected from the group consisting of a film, an acetal film, and a polycarbonate film.
- the positive electrode body 200 is integrally formed with the positive electrode plate 210, the separator 230, and the polymer insulating film part 250.
- the positive electrode plate 210 is accommodated in the space formed by the separator 230 and the polymer insulating film part 250.
- This type of anode 200 is referred to as the "pocketing anode" for convenience as a unique technology owned by the applicant.
- the pocketing anode body 200 shown in FIG. 2 is the existing pocketing anode of the applicant in that the polymer insulating film part 250 between the upper and lower separators 230 protrudes outward to the end of the separator 230. It is different from the sieve.
- a portion of the polymer insulating film part 250 protruding to the outside of the separator 230 may be used to bond or fix the at least one cathode body 300 stacked above or below the anode body 200.
- the positive electrode 200 and the negative electrode 300 are bonded or fixed to each other using a portion of the polymer insulating film part 250 protruding to the outside of the separator 230. If not, the anode 200 and the cathode 300 of the thin film may be bonded or fixed to each other.
- the portion of the polymer insulating film part 250 to be bonded to the negative electrode body 300 is exposed to the outside of the pair of separators 230 to be bonded to the negative electrode body 300.
- the polymer insulating film part 250 is not only bonded to the pair of separators 230 to form the pocketing anode body 200, but also the cathode body 300 stacked on or below the pair. By bonding, the anode body 200 and the cathode body 300 may be maintained in a stacked state.
- the thin film battery 100 according to the exemplary embodiment of the present invention may be fixed by bonding the thin cathode body 300 and the cathode body 200 without using a tape or a binder.
- the polymer insulating film part 250 to be bonded to the negative electrode body 300 is exposed to the outside of the pair of separators 230 to be disposed at both ends in the longitudinal direction or both ends in the width direction of the positive electrode plate 210.
- Can be. 1 to 5 illustrate portions of the polymer insulating film part 250 that are bonded to the negative electrode body 300 are disposed at both ends of the positive electrode plate 210 in the longitudinal direction, respectively, and
- FIG. 6 illustrates the negative electrode body. Portions of the polymer insulating film portion 250 to be bonded to 300 are shown to be disposed at both ends of the positive electrode plate 210 in the width direction.
- the polymer insulating film part 250 exposed to the outside of the pair of separators 230 and disposed on both ends of the positive electrode plate 210 in the longitudinal direction may be formed along the entire length of both ends of the positive electrode plate 210, or It may be formed in a portion of the longitudinal direction of the positive electrode plate 210.
- the polymer insulating film part 250 is disposed along the entire width direction of the positive electrode plate 210. It may be formed or may be formed in a portion of the width direction of the positive electrode plate (210).
- a portion of the polymer insulating film part 250 exposed to the outside of the pair of separators 230 and bonded to the negative electrode body 300 is approximately 0.5 mm from an end of the pair of separators 230. It is preferable to be exposed to protrude, and, in addition, may protrude from the ends of the pair of separators 230 while having a variety of shapes and may be bonded to the negative electrode body 300.
- An end (edge) of the polymer insulating film part 250 protruding outside from the pair of separators 230 may be formed to coincide with an end (edge) of the negative electrode body 300.
- the positive electrode plate 210 should be smaller than the negative electrode plate 310, and the whole of the positive electrode plate 210 may be located inside the edge of the negative electrode plate 310. . Therefore, it is important to stack the anode body 200 and the cathode body 300 so that the edge of the cathode plate 210 does not leave the edge of the anode plate 310. In particular, in the case of mass production of the thin film type battery 100, it becomes even more important. If the edge of the positive electrode plate 210 is out of the edge of the negative electrode plate 310 to join the positive electrode 200 and the negative electrode 300 This is because defective products may result in poor performance.
- an end (edge) of the polymer insulating film part 250 protruding from the outside of the pair of separators 230 and an end (edge) of the negative electrode body 300 protruding from the outside of the pair of separators 230 and an end (edge) of the negative electrode body 300.
- the positive electrode body 200 and the negative electrode body 300 may be bonded to each other without the edge of the positive electrode plate 210 leaving the edge of the negative electrode plate 310.
- the positive electrode body 200 and the negative electrode body in the state where the end (edge) of the polymer insulating film portion 250 protruding to the outside of the separator 230 and the end (edge) of the negative electrode body 300 are matched.
- the edges of the positive electrode plate 210 may be stacked without departing from the edges of the negative electrode plate 310.
- the positive electrode tab 211 of the positive electrode plate 210 is preferably formed to be exposed to the outside of the separator 230 without being covered by the separator 230.
- the negative electrode body 300 may include a negative electrode plate 310 provided with a carbonaceous negative electrode active material and a negative electrode tab 311 capable of occluding and releasing lithium.
- the negative electrode plate 310 may be formed larger than the size or area of the positive electrode plate 210, and both surfaces of the negative electrode plate 310 may be coated to form a coating layer.
- the negative electrode active material is coated on both surfaces of the negative electrode plate 310 in order to prevent the drawings from being complicated.
- a portion of the negative electrode tab 311 of the negative electrode plate 310 may be formed of the polymer insulating film part 250 when the polymer insulating film part 250 is disposed at both ends in the longitudinal direction of the positive electrode plate 210. Can be bonded.
- the negative electrode tab 311 is in contact with the polymer insulating film part 250 protruding to the outside of the separator 230 from both sides 200 in the positive electrode 200 and the negative electrode body 300. ) May be stacked.
- the polymer insulating film part 250 of the positive electrode 200 and the negative electrode tab 311 may be bonded to each other to fix the negative electrode 300 and the positive electrode 200 to each other.
- the width of the negative electrode tab 311 may be greater than the width of the polymer insulating film part 250 corresponding to the negative electrode tab 311.
- the negative electrode tabs 311 of the upper and lower negative electrode bodies 300 should be electrically connected to each other.
- the width of the corresponding polymer insulating film portion 250 is smaller than that of the negative electrode tab 311, the negative electrode tab 311 is not covered by the polymer insulating film portion 250. Therefore, in order to connect the negative electrode tabs 311 to each other, it is preferable that the width of the negative electrode tab 311 is larger than that of the corresponding polymer insulating film part 250.
- the remaining part of the negative electrode tab 311 that is not bonded to the polymer insulating film part 250 may be connected to the negative electrode tab 311 of the negative electrode body 300 facing each other and connected to an external connection terminal (not shown).
- the positive electrode tab 211 and the negative electrode tab 311 are provided on the same side but are not overlapped with each other, but are not necessarily limited thereto.
- the positive electrode tab 211 and the negative electrode tab 311 may not be provided at the same side but may be provided at opposite sides. As such, the position, size, shape, and the like of the positive electrode tab 211 and the negative electrode tab 311 may be freely selected.
- the sum D1 of the longitudinal lengths is preferably the same as the longitudinal length D2 of the negative electrode plate 310.
- the sum of the widthwise length of the separator 230 and the widthwise length D3 of the polymer insulating film part 250 exposed outward in the widthwise direction of the separator is the negative electrode plate ( The same thing as the width direction length D4 of 310 is preferable.
- the cathode body 300 and the anode body 200 are stacked, the anode surface 300 and the anode body 200 are prevented from inconsistency between the edges (edges or ends) of the cathode body 200. This is to facilitate the work and to prevent the electrode active surfaces of the positive electrode plate 210 and the negative electrode plate 310 from being inconsistent with each other.
- the negative electrode plate 310 having a length and width greater than the length and width of the positive electrode plate 210 is laminated on the positive electrode plate 210, an inconsistency in the edge naturally occurs, and thus, the edge of the positive electrode plate 210 is formed. Since the portion and the edge portion of the negative electrode plate 310 are inconsistent with each other, lamination may not be easy and performance of the battery may be degraded.
- the pair of separators 230 and the polymer insulating film part 250 are disposed on the circumferential side of the cathode plate 210. Since it is disposed, the edge portion of the positive electrode body 200 and the edge portion of the negative electrode body 300 are coincident with each other to provide convenience of lamination and to prevent battery performance deterioration.
- a negative electrode active material may be selectively applied to a portion of the negative electrode plate 310 of the negative electrode body 300 bonded to the polymer insulating film part 250, but preferably, the material is not wasted because the negative electrode active material is not coated. It is good to reduce.
- the cathode body 300 may be stacked on the upper and lower portions of the anode body 200, or may be stacked on any one of the upper and lower portions of the anode body 200.
- a negative electrode active material may be selectively coated on a surface of the negative electrode plate 310 that does not face 200.
- the negative electrode active material is disposed on one surface of the negative electrode plate 310 of each negative electrode 300. It is preferred that this coating be applied. That is, the negative electrode active material is sufficient only on the surface facing the positive electrode body 200.
- the positive electrode 200 and the negative electrode 300 having the above configuration may be bonded or pressed by a known device or technology such as using a heating block and a press in a stacked state.
- the polymer insulating film part 250 and the negative electrode 300 which are disposed at both ends in the longitudinal direction or both ends in the width direction of the positive electrode 200 are bonded to each other, thereby reducing battery performance without using a tape or a binder. Without fixing the anode body 200 and the cathode body 300 of the thin film can be mutually and further increase the bonding force between each other.
- Thin film type battery 100 having the configuration as described above, the positive electrode 200 and the positive electrode 200 in a state in which the active contact surface of the negative electrode 300 is maintained intact Since the negative electrode bodies 300 can be bonded to each other, the battery capacity can be maintained as it is to prevent battery performance deterioration.
- the positive electrode 200 and the negative electrode 300 may be combined without using an adhesive coating agent such as a tape or a binder, the material cost of the battery is reduced. It has the advantage of being.
- the thin film type battery 100 does not need to separately perform an operation process for coupling the anode body 200 and the cathode body 300 to each other, thereby simplifying the production process of the battery. The cost is reduced.
- the present invention relates to a thin film battery that can be used as a micro power source, and can be widely used as a power source for portable electronic devices and information and communication devices, which are being miniaturized, and in particular, due to the thin thickness of the thin film battery itself, It can be used more suitably in microelectronic devices.
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Abstract
Description
Claims (10)
- 양극체; 및상기 양극체의 상부 또는 하부 중 적어도 한 곳에 적층되는 음극체;를 포함하고,상기 양극체는,양극 활물질이 도포된 양극판;상기 양극판의 상면 및 하면을 덮는 한 쌍의 분리막; 및상기 한 쌍의 분리막 사이에 개재되는 고분자 절연 필름부;를 포함하며,상기 고분자 절연 필름부 중 상기 분리막의 가장자리 보다 외측으로 돌출된 부위가 상기 음극체의 음극판과 접합되는 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 양극체는 상기 양극 활물질이 도포되지 않은 양극탭을 포함하고,상기 분리막은 상기 양극탭이 상기 분리막의 외측으로 노출되도록 상기 양극판의 양면을 피복하며,상기 음극체의 음극판과 접합되는 상기 고분자 절연 필름부는 상기 양극판의 길이방향 전체 또는 폭방향의 전체를 따라 형성되거나 상기 양극판의 길이방향 일부 또는 폭방향의 일부에 형성되는 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 분리막의 길이방향 길이와 상기 분리막의 길이방향 외측으로 노출된 상기 고분자 절연 필름부의 길이방향 길이의 합은,상기 음극판의 길이방향 길이와 동일한 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 분리막의 폭방향 길이와 상기 분리막의 폭방향 외측으로 노출된 상기 고분자 절연 필름부의 폭방향 길이의 합은,상기 음극판의 폭방향 길이와 동일한 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 고분자 절연 필름부는 상기 분리막에 의해서 피복되는 부위와 피복되지 않고 상기 분리막에서 노출되는 부위를 포함하며,상기 고분자 절연 필름부 중 상기 분리막에서 노출되는 부위의 가장자리가 상기 음극체의 가장자리와 일치되도록 상기 양극체 및 상기 음극체가 적층되는 것을 특징으로 하는 박막형 전지.
- 제 5 항에 있어서,상기 음극체의 가장자리와 상기 고분자 절연 필름부의 가장자리는 각각 서로 마주 보는 가장자리끼리 서로 일치되도록 형성된 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 고분자 절연 필름부 중 상기 분리막의 가장자리 보다 외측으로 돌출된 부위는 상기 음극판에서 돌출 형성된 음극탭과 접합되는 것을 특징으로 하는 박막형 전지.
- 제 7 항에 있어서,상기 고분자 절연 필름부 중 상기 분리막의 가장자리 보다 외측으로 돌출된 부위의 폭은 상기 음극탭의 폭 보다 작게 형성된 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 고분자 절연 필름은 상층, 중간층 및 하층을 포함하며,상기 상층 및 상기 하층은 에틸렌비닐아세테이트(Ethylene-Vinyl Acetate)로 형성되고 상기 중간층은 폴리에틸렌테테프탈레이트(Polyethylene terephtalate)로 형성되어,상기 상층 또는 상기 하층이 가열 용융되어 상기 음극체의 음극판과 접합되는 것을 특징으로 하는 박막형 전지.
- 제 1 항에 있어서,상기 양극체는 포켓팅 양극체로 형성된 것을 특징으로 하는 박막형 전지.
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CN201780007518.XA CN108475827B (zh) | 2016-01-21 | 2017-01-19 | 薄膜型电池 |
EP17741687.2A EP3407417A4 (en) | 2016-01-21 | 2017-01-19 | THIN FILM BATTERY |
JP2018538217A JP6769625B2 (ja) | 2016-01-21 | 2017-01-19 | 薄膜型電池 |
US16/071,382 US10879554B2 (en) | 2016-01-21 | 2017-01-19 | Thin film battery |
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CN107523854B (zh) * | 2017-09-28 | 2025-02-11 | 张家港天工机械制造有限公司 | 一种阴极辊 |
KR102322714B1 (ko) | 2019-02-01 | 2021-11-08 | 주식회사 엘지에너지솔루션 | 절연층이 형성되어 있는 전극을 포함하는 스택형 전극조립체 및 이를 포함하는 리튬 이차전지 |
WO2020159083A1 (ko) * | 2019-02-01 | 2020-08-06 | 주식회사 엘지화학 | 절연층이 형성되어 있는 전극을 포함하는 스택형 전극조립체 및 이를 포함하는 리튬 이차전지 |
KR102390657B1 (ko) | 2019-02-01 | 2022-04-26 | 주식회사 엘지에너지솔루션 | 절연필름을 포함하는 전극 조립체, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 |
KR20210109382A (ko) * | 2020-02-27 | 2021-09-06 | 주식회사 엘지에너지솔루션 | 탭 상에 형성된 절연필름을 포함하는 전극 조립체, 이의 제조방법, 및 이를 포함하는 리튬 이차전지 |
EP4123779A4 (en) * | 2020-03-19 | 2024-07-24 | SANYO Electric Co., Ltd. | SECONDARY BATTERY WITH NON-AQUEOUS ELECTROLYTE |
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CN108475827B (zh) | 2021-04-13 |
JP6769625B2 (ja) | 2020-10-14 |
EP3407417A4 (en) | 2019-07-03 |
JP2019506710A (ja) | 2019-03-07 |
KR20170087606A (ko) | 2017-07-31 |
CN108475827A (zh) | 2018-08-31 |
EP3407417A1 (en) | 2018-11-28 |
US10879554B2 (en) | 2020-12-29 |
KR101870801B1 (ko) | 2018-06-28 |
US20200168940A1 (en) | 2020-05-28 |
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