WO2012134065A2 - 안전성이 향상된 원통형 이차전지 - Google Patents
안전성이 향상된 원통형 이차전지 Download PDFInfo
- Publication number
- WO2012134065A2 WO2012134065A2 PCT/KR2012/001516 KR2012001516W WO2012134065A2 WO 2012134065 A2 WO2012134065 A2 WO 2012134065A2 KR 2012001516 W KR2012001516 W KR 2012001516W WO 2012134065 A2 WO2012134065 A2 WO 2012134065A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- jelly
- roll
- secondary battery
- seal tape
- battery
- Prior art date
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 239000000758 substrate Substances 0.000 claims description 16
- 239000008151 electrolyte solution Substances 0.000 claims description 12
- 239000012790 adhesive layer Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000001879 gelation Methods 0.000 claims description 7
- 238000004804 winding Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 239000003522 acrylic cement Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229920002301 cellulose acetate Polymers 0.000 claims description 3
- 230000000704 physical effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 5
- 239000000499 gel Substances 0.000 description 5
- 235000015110 jellies Nutrition 0.000 description 5
- 239000008274 jelly Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- 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
- H01M10/02—Details
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
-
- 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
- H01M10/0422—Cells or battery with cylindrical casing
-
- 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
-
- 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
- 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
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/183—Sealing members
- H01M50/184—Sealing members characterised by their shape or structure
-
- 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
- H01M50/183—Sealing members
- H01M50/186—Sealing members characterised by the disposition of the sealing members
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/193—Organic material
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/197—Sealing members characterised by the material having a layered structure
-
- 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
- H01M50/183—Sealing members
- H01M50/19—Sealing members characterised by the material
- H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/33—Applications of adhesives in processes or use of adhesives in the form of films or foils for batteries or fuel cells
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2401/00—Presence of cellulose
- C09J2401/006—Presence of cellulose in the substrate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2423/00—Presence of polyolefin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2425/00—Presence of styrenic polymer
-
- 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
Definitions
- the present invention relates to a cylindrical secondary battery having improved safety, and more particularly, to a secondary battery in which a jelly-roll type electrode assembly ('jelly-roll') is embedded in a battery can, including a winding end of the jelly-roll.
- a seal tape is attached to an outer surface of the seal tape, and the seal tape relates to a secondary battery gelled by a reaction with an electrolyte.
- secondary batteries are classified into cylindrical batteries and rectangular batteries in which the electrode assembly is embedded in a cylindrical or rectangular metal can, and pouch-type batteries in which the electrode assembly is embedded in a pouch type case of an aluminum laminate sheet. .
- the electrode assembly embedded in the battery case is a power generator capable of charging and discharging composed of a laminated structure of the anode / separator / cathode, a jelly-roll type wound through a separator between the long sheet-type anode and cathode coated with the active material
- An electrode assembly a plurality of stacked electrode assemblies in which a plurality of positive and negative electrodes of a predetermined size are sequentially stacked in a state where a separator is interposed, a bi-cell in which positive and negative electrodes of a predetermined unit are laminated through a separator, or And a stack / foldable electrode assembly in which unit cells such as a full cell are wound by a separation film.
- the jelly-roll type electrode assembly has advantages of easy manufacturing and high energy density per weight.
- a cylindrical battery is produced by storing a jelly-roll type electrode assembly in a cylindrical metal case.
- jelly-roll When manufacturing a battery using such a jelly-roll type electrode assembly (hereinafter, abbreviated as "jelly-roll"), in order to maintain the shape of a jelly-roll by winding a laminate of anode / separation membrane / cathode roundly Fix the outermost ends with PP (polypropylene) seal tape and store them in a battery case, that is, a metal can, inject the electrolyte solution, and place an electrode terminal (e.g. , The anode cap) is formed by combining the top cap.
- PP polypropylene
- the jelly roll when the battery is dropped or an external impact is applied, the jelly roll is pressed up or down while the jelly roll is moving up and down inside the battery. May deform and cause a short circuit.
- the jelly-roll repeatedly expands and contracts during charging and discharging. At this time, the outer part of the jelly-roll is most affected by expansion and contraction, which may cause disconnection of the electrode.
- the present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.
- An object of the present invention is to provide a lithium secondary battery with improved safety that the seal tape is gelled by the reaction with the electrolyte solution and can prevent the flow of the jelly-roll due to the increased frictional force on the battery case.
- a secondary battery according to the present invention for achieving the above object is a secondary battery in which a jelly-roll type electrode assembly ('jelly-roll') having a cathode / separation membrane / cathode structure is embedded in a battery can, and winding of the jelly-roll A seal tape is attached to an outer surface including an end portion, and the seal tape has a structure in which a gel is formed by reaction with an electrolyte solution.
- a jelly-roll type electrode assembly ('jelly-roll') having a cathode / separation membrane / cathode structure is embedded in a battery can, and winding of the jelly-roll
- a seal tape is attached to an outer surface including an end portion, and the seal tape has a structure in which a gel is formed by reaction with an electrolyte solution.
- the jelly-roll is manufactured in a structure in which the anode, the cathode, and the separator are kept in a wound state by winding the laminate of the anode / separator / cathode round and fixing the outermost end with a seal tape.
- the seal tape attached to the outer edge of the jelly roll is made of a material that is gelled while reacting with the electrolyte solution. Accordingly, in the finished battery, the seal tape is gelled by the electrolyte solution, thereby relieving the force of the jelly-roll outer electrode due to expansion and contraction during charging and discharging of the battery cell, thereby effectively preventing the outer line disconnection of the jelly-roll. can do.
- by increasing the frictional force due to the gelled material it is possible to suppress the vertical movement of the jelly-roll to protect the cell from external impact (falling and vibration).
- the battery can may be, for example, a cylindrical can, and the cylindrical secondary battery is wound around the positive electrode sheet and the negative electrode sheet with the separator interposed therebetween to insert the jelly-roll on which the seal tape is attached to the cylindrical can. And sealing the can after injecting the electrolyte solution.
- the seal tape after attaching the seal tape to the rolled-up jelly-roll and compressing it flat, it can be made into a rectangular secondary battery having a structure inserted into a rectangular can.
- the seal tape is attached to surround the outer circumferential surface including the wound end of the jelly-roll, and its length is preferably made to a length that minimizes the space occupied within the cell. Specifically, if the length of the seal tape is too short, the buffering effect and the increase in frictional force of the gelled seal tape with respect to the inner surface of the battery can may not be large, so that a desired effect may be difficult to expect. On the contrary, if the seal tape is too long, the occupied space inside the battery can becomes larger than necessary, which may cause a decrease in capacity in the same battery can standard, which is not preferable. Therefore, the length of the seal tape may be prepared in a size of preferably 50 to 90%, more preferably in a size of 60 to 80% based on the length of the outer peripheral surface of the jelly-roll.
- the seal tape consists of a film substrate in the form of a tape and an adhesive layer applied on the film substrate in contact with the jelly-roll, wherein the gelation can take place on the film substrate.
- the seal tape may consist of a film substrate of 20-50 ⁇ m thick and an adhesive layer of 2-10 ⁇ m thick. If the thickness of the seal tape is too thin, it may be difficult to exert the effect of gelling of the seal tape, on the contrary, if the thickness is too thick, the thickness of the jelly-roll increases by the decrease in processability when inserted into the battery case Jelly-roll damage is undesirable because it can result in large or reduced capacity at the same size.
- the adhesive layer is not particularly limited as long as it is a material that does not cause a chemical reaction with the battery.
- an acrylic adhesive, an SBR adhesive, or the like may be used.
- the physical properties of the film substrate may be a structure in which the adhesive form is mainly changed. That is, when the electrolyte solution and the seal tape react, the film base of the seal tape and the adhesive layer are mixed with each other and the seal tape changes to a tacky gel state.
- the flow of the jelly-roll in the battery can be further prevented by the adhesion due to the gelation of the film substrate.
- the space between the jelly-roll and the inner surface of the battery can is filled with a sticky gel, thereby preventing the free movement of the jelly-roll inside the battery can, and also acting as a kind of buffer member against external impacts, thereby reducing the jelly-roll. I can protect it.
- the material of the seal tape is not particularly limited as long as the film base material can be gelated by reacting with the electrolyte solution, for example, may include cellulose acetate.
- the battery is preferably a cylindrical lithium secondary battery having a high cost efficiency and a large capacitance.
- FIG. 1 is a vertical cross-sectional view of a secondary battery according to one embodiment of the present invention.
- FIG. 3 is a perspective view of a jelly-roll housed inside the cylindrical cell of FIG. 1;
- FIG. 4 is a schematic horizontal cross-sectional view showing a portion A-A of FIG. 1;
- FIG. 5 is a side view of the seal tape of FIG. 1;
- FIG. 1 is a schematic vertical cross-sectional view of a secondary battery according to one embodiment of the present invention
- FIG. 2 is a photograph showing gelation of a seal tape.
- the cylindrical battery 100 is a secondary battery in which a jelly-roll 110 having a cathode / separation membrane / cathode structure is built in the battery can 120, and the seal tape 130 is impregnated with the electrolyte. It is attached while covering the outer circumferential surface of the jelly-roll 110 in a state, and as shown in FIG. 2, the seal tape 130 reacts with the electrolyte to gel.
- FIG. 3 is a perspective view schematically showing a jelly-roll housed in the cylindrical battery of FIG. 1
- FIG. 4 is a schematic cross-sectional view showing an AA portion of FIG. 1
- FIG. 5 is shown in FIG. A side view of the seal tape is schematically shown.
- the seal tape 130 is attached to an outer surface including the winding end 112 of the jelly-roll 110, and approximately based on the length of the outer circumferential surface of the jelly-roll 110. It is attached at a size of 70%.
- the seal tape 130 is a tape-shaped film substrate 134 having a thickness of 20 ⁇ m, and a 5 ⁇ m-thick adhesive layer 132 coated on the film substrate 134 in contact with the jelly-roll 110. Consists of
- the material of the seal tape 130 includes cellulose acetate, and the adhesive layer 132 includes an acrylic adhesive.
- the gelation of the seal tape 130 mainly occurs in the film substrate 134. Specifically, when the electrolyte is impregnated, the physical properties of the film substrate 134 are changed into a tacky form, and the battery can 120 is in the battery can 120. Flow of jelly-roll 110 is prevented by tackiness by gelling of the film substrate 134.
- the seal tape 130 may fix the wound state of the jelly roll 110 and protect the jelly roll 110 from the side impact.
- the seal tape is gelled by the reaction with the electrolyte solution and fills the space between the jelly-roll and the inner surface of the battery can with a tacky gel, It is possible to protect the jelly-roll from breaking, dropping and vibration by preventing the free movement of the roll and acting as a cushioning member against external impact.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Chemistry (AREA)
- Secondary Cells (AREA)
- Cell Separators (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
Description
Claims (10)
- 양극/분리막/음극 구조의 젤리-롤형 전극조립체('젤리-롤')이 전지 캔에 내장되어 있는 이차전지로서, 상기 젤리-롤의 권취 단부를 포함하는 외면에는 실 테이프(seal tape)가 부착되어 있으며, 상기 실 테이프는 전해액과의 반응에 의해 겔(gel)화 되는 것을 특징으로 하는 이차전지.
- 제 1 항에 있어서, 상기 전지 캔은 원통형 캔인 것을 특징으로 하는 이차전지.
- 제 1 항에 있어서, 상기 실 테이프는 젤리-롤의 외주면의 길이를 기준으로 50 내지 90%의 크기로 부착되어 있는 것을 특징으로 하는 이차전지.
- 제 1 항에 있어서, 상기 실 테이프는 테이프 형태의 필름 기재와, 젤리-롤에 접촉되는 면에서 상기 필름 기재 상에 도포되어 있는 점착층으로 이루어져 있고, 상기 겔화는 필름 기재에서 일어나는 것을 특징으로 하는 이차전지.
- 제 4 항에 있어서, 상기 실 테이프는 10 내지 30 ㎛ 두께의 필름 기재와 2 내지 10 ㎛ 두께의 점착층으로 이루어진 것을 특징으로 하는 이차전지.
- 제 5 항에 있어서, 상기 점착층은 아크릴계 접착제, SBR계 접착제 중 어느 하나를 포함하는 것을 특징으로 하는 이차전지.
- 제 4 항에 있어서, 상기 실 테이프에 전해액이 함침될 때, 필름 기재의 물리적 성상이 점착성이 있는 형태로 변화되는 것을 특징으로 하는 이차전지.
- 제 7 항에 있어서, 전지 캔 내에서 젤리-롤의 유동이 상기 필름 기재의 겔화에 의한 점착성에 의해 방지되는 것을 특징으로 하는 이차전지.
- 제 1 항에 있어서, 상기 실 테이프의 소재는 셀룰로오스 아세테이트를 포함하고 있는 것을 특징으로 하는 이차전지.
- 제 1 항에 있어서, 상기 전지는 원통형 리튬 이차전지인 것을 특징으로 하는 이차전지.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201280013588.3A CN103443985B (zh) | 2011-03-31 | 2012-02-29 | 具有提高的安全性的圆柱形二次电池 |
JP2013555374A JP5684927B2 (ja) | 2011-03-31 | 2012-02-29 | 安全性が向上した円筒形二次電池 |
US13/954,484 US9093684B2 (en) | 2011-03-31 | 2013-07-30 | Cylindrical secondary battery of improved safety |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110029372A KR101239622B1 (ko) | 2011-03-31 | 2011-03-31 | 안전성이 향상된 원통형 이차전지 |
KR10-2011-0029372 | 2011-03-31 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/954,484 Continuation US9093684B2 (en) | 2011-03-31 | 2013-07-30 | Cylindrical secondary battery of improved safety |
Publications (2)
Publication Number | Publication Date |
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WO2012134065A2 true WO2012134065A2 (ko) | 2012-10-04 |
WO2012134065A3 WO2012134065A3 (ko) | 2012-11-22 |
Family
ID=46932039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2012/001516 WO2012134065A2 (ko) | 2011-03-31 | 2012-02-29 | 안전성이 향상된 원통형 이차전지 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9093684B2 (ko) |
JP (1) | JP5684927B2 (ko) |
KR (1) | KR101239622B1 (ko) |
CN (1) | CN103443985B (ko) |
TW (1) | TWI456818B (ko) |
WO (1) | WO2012134065A2 (ko) |
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CN103443985A (zh) | 2013-12-11 |
WO2012134065A3 (ko) | 2012-11-22 |
CN103443985B (zh) | 2016-03-09 |
KR101239622B1 (ko) | 2013-03-07 |
TWI456818B (zh) | 2014-10-11 |
US20130316205A1 (en) | 2013-11-28 |
US9093684B2 (en) | 2015-07-28 |
JP2014511160A (ja) | 2014-05-12 |
TW201304237A (zh) | 2013-01-16 |
JP5684927B2 (ja) | 2015-03-18 |
KR20120111082A (ko) | 2012-10-10 |
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