KR101957484B1 - Cross-linked film for Lead tap sealing and manufacturing method thereof - Google Patents
Cross-linked film for Lead tap sealing and manufacturing method thereof Download PDFInfo
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- KR101957484B1 KR101957484B1 KR1020170177627A KR20170177627A KR101957484B1 KR 101957484 B1 KR101957484 B1 KR 101957484B1 KR 1020170177627 A KR1020170177627 A KR 1020170177627A KR 20170177627 A KR20170177627 A KR 20170177627A KR 101957484 B1 KR101957484 B1 KR 101957484B1
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- secondary battery
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- crosslinked film
- lead tab
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- 238000007789 sealing Methods 0.000 title claims abstract description 79
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000002131 composite material Substances 0.000 claims abstract description 65
- 239000000843 powder Substances 0.000 claims abstract description 26
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000005038 ethylene vinyl acetate Substances 0.000 claims abstract description 20
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims abstract description 20
- 229920001577 copolymer Polymers 0.000 claims abstract description 19
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 23
- 229920005989 resin Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000011342 resin composition Substances 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 150000002978 peroxides Chemical class 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 5
- 235000012239 silicon dioxide Nutrition 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 11
- 239000000805 composite resin Substances 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 239000010410 layer Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- KDGNCLDCOVTOCS-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy propan-2-yl carbonate Chemical compound CC(C)OC(=O)OOC(C)(C)C KDGNCLDCOVTOCS-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N Methyl ethyl ketone Natural products CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000004833 X-ray photoelectron spectroscopy Methods 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- -1 t-butylperoxy Chemical group 0.000 description 2
- 238000002076 thermal analysis method Methods 0.000 description 2
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 description 2
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 description 1
- XKBHBVFIWWDGQX-UHFFFAOYSA-N 2-bromo-3,3,4,4,5,5,5-heptafluoropent-1-ene Chemical compound FC(F)(F)C(F)(F)C(F)(F)C(Br)=C XKBHBVFIWWDGQX-UHFFFAOYSA-N 0.000 description 1
- LRXDAAQFKRUNLY-UHFFFAOYSA-N CC(=C)C=COOC(C)(C)C Chemical compound CC(=C)C=COOC(C)(C)C LRXDAAQFKRUNLY-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical group CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- SXAMDWLRDGOQAF-UHFFFAOYSA-N ethene;ethenyl acetate Chemical compound C=C.C=C.CC(=O)OC=C SXAMDWLRDGOQAF-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- SWAXTRYEYUTSAP-UHFFFAOYSA-N tert-butyl ethaneperoxoate Chemical compound CC(=O)OOC(C)(C)C SWAXTRYEYUTSAP-UHFFFAOYSA-N 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
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- 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
- H01M50/172—Arrangements of electric connectors penetrating the casing
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- C—CHEMISTRY; METALLURGY
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/246—Intercrosslinking of at least two polymers
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- C08J5/18—Manufacture of films or sheets
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
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- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
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Abstract
Description
본 발명은 수지조성물 및 나노입자를 포함하는 이차전지 리드탭 실링용 복합가교필름 및 이의 제조방법에 관한 것이다. The present invention relates to a composite crosslinked film for sealing a secondary battery lead tab including a resin composition and nanoparticles, and a method for producing the same.
리튬 이차전지는 스마트폰, 노트북, 캠코더 등의 전자기기 분야에 널리 사용되고 있으며, 전기자동차 배터리로 이용되면서 사용용도가 점차 확대되고 있다. 최근, 모바일 기기의 수요가 증가함에 따라, 관련 기술 개발이 수행되고 있으며, 이에 따라 이차전지에 대한 수요도 함께 증가하고 있다. 이러한 이차전지들 중에서도 특히 리튬 이차전지는 높은 에너지 밀도와 방전 전압을 가져 보편적으로 이용되는 이차전지 중 하나이다. Lithium secondary batteries are widely used in electronic devices such as smart phones, notebooks, and camcorders, and are being used for electric vehicle batteries and are being used for a wider range of applications. In recent years, as the demand for mobile devices has increased, related technologies have been developed, and the demand for secondary batteries is increasing accordingly. Among these secondary batteries, lithium secondary batteries are one of the secondary batteries commonly used because of their high energy density and discharge voltage.
또한, 전지의 이용분야 확대에 따라 형태 변경이 용이하고 제조비용이 상대적으로 저렴한 파우치형 이차전지에 대한 관심이 높아지고 있다. 파우치형 이차전지는 경량화 및 소형화에 유리하여 스마트폰, 노트북, 캠코더 등과 같은 전자기기 뿐만 아니라 전기 자동차나 하이브리드 자동차의 전원으로 주목받고 있다. In addition, with the expansion of the field of use of batteries, there is a growing interest in a pouch-type secondary battery which is easily changed in shape and relatively inexpensive to manufacture. The pouch-type secondary battery is advantageous in weight reduction and miniaturization, and has attracted attention as a power source for electric vehicles and hybrid vehicles as well as electronic devices such as smart phones, notebooks, and camcorders.
대부분의 파우치형 이차전지는 전극군으로부터 인출된 리드 탭(lead tap)을 가지며, 이러한 리드탭과 외장재(파우치)는 실링 필름을 통해 밀봉된다. 파우치형 이차전지의 수요 증가에 따라 파우치와 리드탭의 밀봉에 사용되는 실링필름의 중요성이 증가하고 있으며, 이러한 실링필름은 우수한 밀착성, 절연성 및 성형성이 요구되며, 나아가 전지의 구동에 따른 온도 상승에 대비하여, 열에 강한 특성이 요구된다. Most of the pouch-type secondary batteries have lead tabs drawn out from the electrode group, and these lead tabs and the casing (pouch) are sealed through the sealing film. As the demand for pouch-type secondary batteries increases, the importance of sealing films used for sealing pouches and lead taps is increasing. Such sealing films are required to have excellent adhesion, insulation, and moldability. Further, , Heat-resistant characteristics are required.
이러한 실링 필름에 관하여, 일본 등록특허공보 402547호에서는 2층의 필름을 개시하고 있으며, 일본 등록특허공보 5108228호 및 대한민국 공개특허공보 10-2016-0060526호에서는 3층으로 적층된 실링 필름을 개시하고 있다. 그러나 이러한 다층의 필름의 경우, 필연적으로 각 층이 서로 다른 열팽창계수를 가지게 되며, 이러한 상이한 열팽창계수에 따라, 전지의 구동에 의한 가열 또는 냉각에 의한 층분리가 일어날 수 있으며, 결과적으로 사용에 의해 밀봉성 및 절연성 등이 저하되는 문제점이 발생할 수 있다. Regarding such a sealing film, Japanese Patent Publication No. 402547 discloses a two-layer film, Japanese Patent Publication No. 5108228 and Korean Patent Laid-Open Publication No. 10-2016-0060526 disclose sealing films laminated in three layers have. However, in the case of such a multi-layer film, each layer necessarily has a different thermal expansion coefficient, and depending on such different thermal expansion coefficients, layer separation may occur due to heating or cooling by driving the cell, The sealing property and the insulating property may be deteriorated.
본 발명의 목적은 절연성 및 부착력이 우수한 이차전지 리드탭 실링용 복합 가교필름을 제공하는 것이다. An object of the present invention is to provide a composite crosslinked film for sealing a lead tab of a secondary battery excellent in insulating property and adhesion.
본 발명의 다른 목적은 다층의 라미네이트를 필요로 하지 않는 이차전지 리드탭 실링용 복합 가교필름을 제공하는 것이다. Another object of the present invention is to provide a composite crosslinked film for secondary battery lead tab sealing that does not require a multilayer laminate.
본 발명의 또 다른 목적은 높은 열 접착강도를 통하여 리드탭과 이차전지 외장재간 밀봉성을 향상시킬 수 있는 이차전지 리드탭 실링용 복합 가교필름을 제공하는 것이다. It is still another object of the present invention to provide a composite crosslinked film for sealing a lead tab of a secondary battery, which can improve the sealing property between the lead tab and the outer surface of the secondary battery through high thermal bonding strength.
본 발명에 의한 이차전지 리드탭 실링용 복합가교필름은 The composite crosslinked film for secondary battery lead tab sealing according to the present invention comprises
이차전지의 리드탭과 외장재 사이를 밀봉하는 이차전지의 리드탭 실링용 복합가교 필름으로서,A composite crosslinked film for sealing a lead tab of a secondary battery which seals between a lead tab of the secondary battery and a casing,
에틸렌비닐아세테이트, 에틸렌프로필렌디엔 공중합체, 가교제 및 나노 세라믹 분말을 포함하는 조성물을 열 압출하여 가교된 것이다. Ethylene vinyl acetate, ethylene propylene diene copolymer, cross-linking agent, and nanoceramic powder is thermally extruded and crosslinked.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 In the composite crosslinked film for sealing the lead tab of a secondary battery according to an embodiment of the present invention
상기 나노 세라믹 분말은상기 나노 세라믹 분말은 이산화규소 및 탄산칼슘에서 선택되는 하나 이상일 수 있다.The nanoceramic powder may be at least one selected from silicon dioxide and calcium carbonate.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 상기 나노 세라믹 분말은 평균 입경이 20 내지 200 ㎚일 수 있다. In the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention, the nanoceramic powder has an average particle diameter of 20 To 200 nm.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 상기 복합가교필름은 에틸렌비닐아세테이트 100 중량부에 대하여 20 내지 70 중량부의 에틸렌비닐아세테이트 및 80 내지 30 중량부의 에틸렌프로필렌디엔 공중합체를 포함할 수 있다. In the composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the composite crosslinked film may include 20 to 70 parts by weight of ethylene vinyl acetate and 80 to 30 parts by weight of an ethylene propylene diene copolymer with respect to 100 parts by weight of ethylene vinyl acetate . ≪ / RTI >
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 상기 단층 이차전지 리드탭 실링 필름은 나노 세라믹 분말을 0.1 내지 10 중량% 포함할 수 있다. In the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention, the single layer secondary battery lead tab sealing film may contain 0.1 to 10 wt% of nanoceramic powder.
본 발명은 또한 이차전지 리드탭 실링용 복합가교필름 제조방법을 제공한다.The present invention also provides a method for producing a composite crosslinked film for secondary battery lead tapped sealing.
본 발명에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법은 A method for manufacturing a composite crosslinked film for sealing a secondary battery lead tab according to the present invention comprises:
에틸렌에틸렌비닐아세테이트 및 에틸렌프로필렌디엔공중합체를 포함하는 수지 조성물, 나노 세라믹 분말 및 퍼옥사이드계 가교제를 혼합하는 단계;Mixing a resin composition comprising ethylene ethylene vinyl acetate and an ethylene propylene diene copolymer, a nanoceramic powder and a peroxide type crosslinking agent;
혼합된 수지 조성물로 혼합수지 입자를 제조하는 단계; 및 Preparing mixed resin particles with a mixed resin composition; And
상기 혼합수지 입자를 압출하는 단계;를 포함한다.And extruding the mixed resin particles.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법에서 상기 나노 세라믹 분말은 이산화규소, 탄산칼슘, 탄산마그네슘, 산화아연, 산화지르코늄, 삼산화텅스텐 및 이산화티탄 입자에서 선택되는 하나 또는 둘 이상인 단층 이차전지 리드탭 실링 필름 제조방법. In the method for fabricating a composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the nanoceramic powder may include one selected from the group consisting of silicon dioxide, calcium carbonate, magnesium carbonate, zinc oxide, zirconium oxide, tungsten trioxide, Or two or more single layer secondary battery lead taps.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법에서 상기 나노 세라믹 분말은 입경이 20 내지 200 ㎚일 수 있다. In the method for manufacturing a composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the nanoceramic powder may have a particle diameter of 20 to 200 nm.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법에서 상기 혼합수지 입자를 제조하는 단계에서의 가열은 건조를 위한 초기 바렐온도 50로부터 140℃ 내지 158℃에서 수행될 수 있다.In the method for producing a composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the heating in the step of producing the mixed resin particles may be performed at an initial barrel temperature for drying at 140 to 158 ° C .
본 발명은 또한 이차전지를 제공하며, 본 발명에 의한 이차전지는 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름을 포함한다. The present invention also provides a secondary battery, wherein the secondary battery according to the present invention includes a composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention.
본 발명에 의한 이차전지 리드탭 실링용 복합 가교필름은 에틸렌비닐아세테이트 및 에틸렌프로필렌디엔공중합체를 포함하는 수지 복합체; 및 나노 세라믹 분말을 포함하여 절연성 및 부착성이 우수하며, 리드탭과 이차전지 외장재간 밀봉성을 향상시킬 수 있는 장점이 있다.The composite crosslinkable film for secondary battery lead tab sealing according to the present invention comprises a resin composite comprising ethylene vinyl acetate and ethylene propylene diene copolymer; And nanoceramic powder, and has an advantage of improving the sealing property between the lead tab and the outer sheath of the secondary battery.
도 1은 이산화규소 분말을 포함하는 복합가교필름을 X선 광전자 분광법으로 측정한 결과이다.
도 2는 탄산칼슘 분말을 포함하는 복합가교필름을 X선 광전자 분광법으로 측정한 결과이다.
도3은 이산화규소 분말을 포함하는 복합가교필름을 열분석 (TGA/DSC) 특성을 측정한 결과이다.1 is a result of X-ray photoelectron spectroscopy measurement of a composite crosslinked film containing silicon dioxide powder.
2 is a result of X-ray photoelectron spectroscopy measurement of a composite crosslinked film containing calcium carbonate powder.
Fig. 3 is a result of measurement of thermal analysis (TGA / DSC) characteristics of a composite crosslinked film containing silicon dioxide powder.
이하 본 발명에 따른 이차전지 리드탭 실링용 복합 가교필름에 대해 상세히 설명한다. 이때, 사용되는 기술 용어 및 과학 용어에 있어서 다른 정의가 없다면, 이 발명이 속하는 기술 분야에서 통상의 지식을 가진 자가 통상적으로 이해하고 있는 의미를 가지며, 하기의 설명에서 본 발명의 요지를 불필요하게 흐릴 수 있는 공지 기능 및 구성에 대한 설명은 생략한다. Hereinafter, the composite crosslinked film for sealing the lead tab of a secondary battery according to the present invention will be described in detail. Here, unless otherwise defined, technical terms and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. In the following description, the gist of the present invention is unnecessarily blurred And a description of the known function and configuration will be omitted.
본 발명은 The present invention
이차전지의 리드탭과 외장재 사이를 밀봉하는 이차전지의 리드탭 실링용 복합가교 필름으로서,A composite crosslinked film for sealing a lead tab of a secondary battery which seals between a lead tab of the secondary battery and a casing,
에틸렌비닐아세테이트, 에틸렌프로필렌디엔 공중합체, 가교제 및 나노 세라믹 분말을 포함하는 조성물을 열 압출하여 가교된 이차전지 리드탭 실링용 복합가교필름에 관한 것이다. The present invention relates to a composite crosslinked film for secondary battery lead tab sealing by thermally extruding a composition comprising ethylene vinyl acetate, an ethylene propylene diene copolymer, a crosslinking agent and a nanoceramic powder.
종래 이차전지에서 리드탭의 밀봉을 위해 이용되는 실링 부재는 절연성, 밀착력 및 부착력을 확보하기 위한 관점에서 2층 이상의 다층으로 형성된 경우가 많았다. 그러나 다층으로 실링 부재를 형성하는 경우 제조 공정적인 관점에서 적층(라미네이트)하는 단계를 필수적으로 더 포함하게 되어 생산 효율이 낮아지는 문제가 발생할 수 있으며, 장기간 사용시 층간 박리와 같은 내구도 저하 또한 유발할 수 있는 문제점이 있다.The sealing member used for sealing the lead taps in the conventional secondary battery has been often formed as a multilayer of two or more layers from the viewpoint of securing the insulating property, the adhesion force and the adhesive force. However, when a sealing member is formed in multiple layers, a step of laminating (laminating) from the viewpoint of manufacturing process is essentially included, which may result in a problem of lowering the production efficiency, and may cause a decrease in durability such as delamination during long- There is a problem.
이러한 문제점을 극복하기 위하여 본 출원인은 리드탭의 밀봉을 위한 실링 부재에 관하여 장기간 연구를 수행하였으며, 상술한 바와 같은 이차전지 리드탭 실링용 복합가교필름을 발명하기에 이르렀다. 본 발명에 의한 이차전지 리드탭 실링용 복합가교필름은 단층으로 이차전지에 적용하는 경우에도 밀봉성, 절연성 및 융착력이 우수한 장점이 있어, 결과적으로 단층의 실링부재를 제조하는 간단한 방법으로도 성능이 우수한 이차전지 리드탭 실링 부재를 제공하는 장점이 있다. In order to overcome such a problem, the present applicant has conducted a long-term study on a sealing member for sealing a lead tab, and has come up with the inventive composite crosslinked film for sealing a secondary battery lead tab as described above. The composite crosslinked film for sealing a secondary battery lead taps according to the present invention has an advantage of being excellent in sealing property, insulation property, and fusion strength even when applied to a secondary battery as a single layer. As a result, There is an advantage of providing this excellent secondary battery lead tab sealing member.
이에 따라 최근 그 수요가 점차 증가하고 있으며, 리드탭의 밀봉이 중요한 파우치형 이차전지에서 높은 밀봉성으로 전해액 등의 유출을 방지하며, 더욱 내구도 높은 파우치형 이차전지를 제조할 수 있다. Accordingly, in recent years, there has been an increase in demand, and in a pouch type secondary battery in which sealing of the lead tab is important, leakage of electrolytic solution or the like is prevented with high sealing performance, and a pouch type secondary battery with higher durability can be manufactured.
본 발명에 의한 이차전지 리드탭 실링용 복합가교필름은 에틸렌비닐아세테이트(Ethylene vinyl Acetate) 및 에틸렌프로필렌디엔 공중합체(ethylene propylene diene terpolymer)를 포함하는 수지 조성물을 가교제로 가교한 수지 복합체를 포함하며, 이러한 수지 복합체의 조성에 의하여 제조되는 수지 복합체가 우수한 열융착력 및 일정 수준 이상의 탄성을 가지게 되며, 리드탭과 이차전지의 몸체를 우수한 밀봉력으로 밀봉할 수 있다. The composite crosslinked film for sealing the lead tab of a secondary battery according to the present invention comprises a resin composite obtained by crosslinking a resin composition comprising ethylene vinyl acetate and an ethylene propylene diene terpolymer with a crosslinking agent, The resin composite produced by the composition of such a resin composite has an excellent heat fusion force and elasticity of a certain level or more, and the lead tab and the body of the secondary battery can be sealed with excellent sealing force.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 에틸렌비닐아세테이트는 가교제에 의해 가교결합을 형성할 수 있는 범위에서 제한없이 이용이 가능하나, 구체적으로 비닐아세테이트를 4 내지 30 중량% 포함하는 것일 수 있다.In the composite crosslinked film for sealing a lead of a secondary battery according to an embodiment of the present invention, ethylene vinyl acetate can be used without limitation within a range capable of forming crosslinking by a crosslinking agent. Specifically, vinyl acetate is contained in an amount of 4 to 30 wt% % ≪ / RTI >
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 에틸렌프로필렌디엔 공중합체는 좋게는 에틸렌을 40 내지 90 중량%, 더욱 좋게는 50 내지 80 중량% 포함할 수 있으며, 상술한 범위에서 가교가 용이하여 에틸렌비닐아세테이트와 긴밀한 가교결합을 형성할 수 있으면서도, 가공성이 우수한 장점이 있다. In the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention, the ethylene propylene diene copolymer preferably contains 40 to 90% by weight, more preferably 50 to 80% by weight, of ethylene, Is easily crosslinked to form a crosslinked bond with ethylene vinyl acetate, and it is also excellent in workability.
이때 상술한 수지 복합체는 폴리올레핀 100 중량부에 대하여 5 내지 30 중량부의 에틸렌비닐아세테이트 및 5 내지 30중량부의 에틸렌프로필렌디엔 공중합체를 포함할 수 있으며, 더욱 좋게는 폴리올레핀 100 중량부에 대하여 5 내지 10 중량부의 에틸렌비닐아세테이트 및 5 내지 10 중 중량부의 에틸렌프로필렌디엔 공중합체를 포함할 수 있다. 이러한 범위에서 절연성 및 밀봉성이 우수하면서도, 니켈 등의 금속재질인 이차전지 리드탭과의 결착력을 더욱 향상시킬 수 있는 장점이 있다. The resin composite may include 5 to 30 parts by weight of ethylene vinyl acetate and 5 to 30 parts by weight of ethylene propylene diene copolymer based on 100 parts by weight of the polyolefin and more preferably 5 to 10 parts by weight Part of ethylene vinyl acetate and 5 to 10 parts by weight of ethylene propylene diene copolymer. In this range, it is possible to further improve the adhesion force with the secondary battery lead tab, which is a metal material such as nickel, while having excellent insulation and sealing properties.
나아가, 본 발명의 일 실시예에 의한 리드탭 실링용 복합 가교 필름은 에틸렌비닐아세테이트, 에틸렌프로필렌디엔 공중합체 외에 밀봉성, 절연성 등을 향상시키기 위해 통상적으로 이용되는 고분자를 더 포함할 수 있으나, 본 발명이 이에 제한되는 것은 아니다. Further, the composite crosslinked film for sealing a lead taps according to an embodiment of the present invention may further include a polymer commonly used for improving the sealability, insulation, etc. in addition to ethylene vinyl acetate and ethylene propylene diene copolymer, The invention is not limited thereto.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름은 에틸렌비닐아세테이트 및 에틸렌프로필렌디엔 공중합체의 가교를 위한 가교제를 더 포함한다. 가교제는 상술한 수지 조성물을 가교결합시킬 수 있는 범위에서 제한없이 이용이 가능하나, 일예로 퍼옥사이드계 가교제를 이용할 수 있다. 비한정적인 일 예로 상기 퍼옥사이드계 가교제는 t-부틸퍼옥시이소프로필카르보네이트, t-부틸퍼옥시라우릴레이트, t-부틸퍼옥시아세테이트, 디-t-부틸디퍼옥시프탈레이트, t-디부틸퍼옥시말레인산, 시클로헥사논퍼옥사이드, t-부틸큐밀퍼옥사이드, t-부틸히드로퍼옥사이드, t-부틸퍼옥시벤조에이트, 디큐밀퍼옥사이드, 1,3-비스(t-부틸퍼옥시이소프뢸)벤젠, 메틸에틸케톤퍼옥사이드, 2,5-디메틸-2,5-디(벤조일퍼옥시)헥산, 2,5-디메틸-2,5-디(t-부틸퍼옥시)헥산, 디-t-부틸퍼옥사이드, 2,5-디메틸-2,5-디(t-부틸퍼옥시)-3-헥산, n-부틸-4,4-비스(t-부틸퍼옥시)발러레이트, 및 a,a-비스(t-부틸퍼옥시)디이소프로필벤젠에서 선택되는 하나 또는 둘 이상을 포함할 수 있으나, 본 발명이 이에 제한되는 것은 아니다. The composite crosslinked film for secondary battery lead tab sealing according to an embodiment of the present invention further includes a crosslinking agent for crosslinking ethylene vinyl acetate and ethylene propylene diene copolymer. The crosslinking agent can be used without limitation within the range capable of crosslinking the above-mentioned resin composition. For example, a peroxide crosslinking agent can be used. As a non-limiting example, the peroxide type crosslinking agent may be at least one selected from the group consisting of t-butylperoxyisopropyl carbonate, t-butylperoxylaurate, t-butylperoxyacetate, di- T-butyl peroxybenzoate, dicumyl peroxide, 1,3-bis (t-butyl peroxyisoprene), t-butyl peroxybenzoate, Benzene, methyl ethyl ketone peroxide, 2,5-dimethyl-2,5-di (benzoylperoxy) hexane, 2,5-dimethyl- Butylperoxide, 2,5-dimethyl-2,5-di (t-butylperoxy) -3-hexane, n-butyl- - bis (t-butylperoxy) diisopropylbenzene, but the present invention is not limited thereto.
또한 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 가교제는 상술한 에틸렌비닐아세테이트 및 에틸렌프로필렌디엔 공중합체의 가교결합을 형성할 수 있는 범위에서 제한없이 첨가 가능하나, 구체적으로 폴리올레핀 100 중량부 대비 1 내지 5 중량부 첨가될 수 있다.In the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention, the crosslinking agent may be added without limitation in the range capable of forming the crosslinking between the ethylene vinyl acetate and the ethylene propylene diene copolymer, 1 to 5 parts by weight based on 100 parts by weight of the polyolefin.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름에서 상기 나노세라믹 분말은 이산화규소 및 탄산칼슘에서 선택되는 하나 이상을 포함할 수 있다. 본 발명에 의한 이차전지 리드탭 실링용 복합가교필름은 상술한 나노세라믹 분말을 포함하여 더욱 높은 절연성을 나타낼 수 있음은 물론이며, 이와 동시에 이차전지의 몸체 및 이차전지 리드탭 모두에 대하여 접착력이 우수하여 전해액의 누수를 예방할 수 있다.In the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention, the nanoceramic powder may include at least one selected from silicon dioxide and calcium carbonate. The composite crosslinked film for sealing a secondary battery lead tab according to the present invention can exhibit a higher insulating property including the above-mentioned nanoceramic powder. At the same time, the composite crosslinked film for the secondary battery lead tab sealing can exhibit excellent adhesion to both the body of the secondary battery and the lead tab of the secondary battery. Thereby preventing leakage of the electrolytic solution.
본 발명의 일 실시예에 의한 나노세라믹 분말은 좋게는 평균 입경이 20 내지 200 ㎚, 더욱 좋게는 30 내지 110 ㎚일 수 있다. 상술한 범위에서 우수한 절연성을 나타내면서도 수지 복합체와의 높은 분산성으로 균일한 조성의 복합가교필름을 제조할 수 있다.The nanoceramic powder according to one embodiment of the present invention preferably has an average particle diameter of 20 to 200 nm, 30 to 110 nm. A composite crosslinked film having a uniform composition can be produced with high dispersibility with the resin complex while exhibiting excellent insulation in the above-mentioned range.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름은 절연성을 확보하기 위한 범위에서 나노 세라믹 분말을 제한없이 포함할 수 있으나, 나노 세라믹 분말의 함량이 지나치게 높은 경우 열융착력이 저하되는 문제가 발생할 수 있으며, 나노세라믹 분말의 함량이 지나치게 낮은 경우 절연성이 일부 저하될 수 있다. 좋게는 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름은 전체 중량 대비 나노 세라믹 분말을 0.1 내지 10 중량%, 더욱 좋게는 1 내지 8 중량%포함할 수 있다. The composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention may include nanoceramic powder within a range to secure insulation, but when the content of the nanoceramic powder is excessively high, If the content of the nanoceramic powder is too low, the insulating property may be partially lowered. Preferably, the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention may contain 0.1 to 10% by weight, more preferably 1 to 8% by weight, of the nano-ceramic powder relative to the total weight.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합 가교 필름은 이차전지의 종류에 제한없이 적용이 가능하며, 좋게는 파우치형 이차전지에서 리드탭과 이차전지 몸체를 밀봉할 수 있다. 또한 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름은 일예로 열융착을 통하여 이차전지에 적용이 가능하나, 본 발명이 이에 제한되는 것은 아니다. The composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention can be applied to any type of secondary battery without limitation, and preferably the lead tab and the secondary battery body can be sealed in the pouch type secondary battery. In addition, the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention can be applied to a secondary battery through heat fusion, but the present invention is not limited thereto.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름의 두께는 이차전지의 크기, 리드탭의 크기, 이차전지의 사용목적 등에 따라 달라질 수 있음은 물론이다. 좋게는 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름의 두께는 30 μm , 더욱 구체적으로는 50 μm 내지 200 μm일 수 있으나, 본 발명이 이에 제한되는 것은 아니다.It is needless to say that the thickness of the composite crosslinked film for sealing the secondary battery lead taps according to an embodiment of the present invention may vary depending on the size of the secondary battery, the size of the lead tab, and the purpose of using the secondary battery. Preferably, the thickness of the composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention may be 30 μm, more specifically, 50 μm to 200 μm, but the present invention is not limited thereto.
본 발명은 또한 이차전지 리드탭 실링용 복합가교필름 제조방법을 제공한다. The present invention also provides a method for producing a composite crosslinked film for secondary battery lead tapped sealing.
본 발명에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법은 A method for manufacturing a composite crosslinked film for sealing a secondary battery lead tab according to the present invention comprises:
에틸렌비닐아세테이트 및 에틸렌프로필렌디엔공중합체를 포함하는 수지 조성물, 나노 세라믹 분말 및 퍼옥사이드계 가교제를 혼합하는 단계;Mixing a resin composition comprising an ethylene vinyl acetate and an ethylene propylene diene copolymer, a nanoceramic powder and a peroxide type crosslinking agent;
혼합된 수지 조성물로 혼합수지 입자를 제조하는 단계; 및 Preparing mixed resin particles with a mixed resin composition; And
상기 혼합수지 입자를 압출하는 단계;를 포함한다. And extruding the mixed resin particles.
본 발명에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법은 별도의 적층단계를 포함하지 않으므로 간단한 방법으로 리드탭 실링용 복합가교필름을 제조할 수 있으며, 나아가 본 발명에 의한 제조방법으로 제조되는 이차전지 리드탭 실링용 복합가교필름은 절연성이 우수하여 이차전지의 작동 시 누전을 방전하면서도, 밀봉성, 열융착력 및 탄성이 우수하여 이차전지의 몸체 및 실링부재와 긴밀하게 접착되어 전해액의 누수를 예방할 수 있는 장점이 있다. Since the method for manufacturing a composite crosslinked film for sealing a lead tab of a secondary battery according to the present invention does not include a separate lamination step, it is possible to produce a composite crosslinked film for sealing a lead taps by a simple method. Further, The composite crosslinked film for sealing the secondary battery lead taps has excellent insulation properties and is excellent in sealing property, heat fusion strength and elasticity while discharging the leakage current in operation of the secondary battery, and is closely adhered to the body and the sealing member of the secondary battery, Can be prevented.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법에서 혼합수지 입자를 제조하는 단계는 수지 조성물과 나노 세라믹 분말을 균일하게 혼합하며, 가교결합이 용이하게 수행되는 온도 범위에서 제한없이 수행이 가능하다. 구체적이고 비한정적인 일예로 혼합수지 입자를 제조하는 단계는 120 ℃내지 138 ℃, 좋게는 150 ℃내지 170 ℃에서 수행될 수 있으나, 본 발명이 이에 제한되는 것은 아니다.In the method for manufacturing a composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the resin composite and the nanoceramic powder are uniformly mixed, and in a temperature range where crosslinking is easily performed It is possible to perform without limitation. The step of preparing the mixed resin particles in a specific and non-limiting example may be performed at 120 ° C to 138 ° C, preferably at 150 ° C to 170 ° C, but the present invention is not limited thereto.
이때 제조되는 혼합수지 입자의 크기는 이후 용이하게 압출을 수행할 수 있는 범위 내에서는 제한없이 제조 가능하다. 구체적이고 비한정적인 일예로 혼합수지 입자의 입경은 0.1 내지 50 ㎜, 좋게는 0.3 내지 20 ㎜일 수 있으나 본 발명이 이에 제한되는 것은 아니다.The size of the mixed resin particles produced at this time can be manufactured without limitation within a range in which extrusion can be easily performed thereafter. For example, the particle diameter of the mixed resin particles may be 0.1 to 50 mm, preferably 0.3 to 20 mm, but the present invention is not limited thereto.
본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름 제조방법에서 압출단계는 통상의 기술자가 당 업계의 기술수준으로 통상적으로 이용하는 압출방법의 경우 제한없이 이용이 가능하며, 본 발명이 이에 제한되는 것은 아니다. 구체적이고 비한정적인 일예로 압출은 0.1 내지 50 kgf/cm2, 좋게는 5 내지 15 kgf/cm2에서 수행될 수 있으나 본 발명이 이에 제한되는 것은 아니다.In the method of manufacturing a composite crosslinked film for sealing a secondary battery lead taps according to an embodiment of the present invention, the extrusion step can be used without limitation in the case of an extrusion method commonly used by a person skilled in the art at the level of the art, But is not limited thereto. In a specific, non-limiting example, extrusion may be carried out at from 0.1 to 50 kgf / cm 2 , preferably from 5 to 15 kgf / cm 2 , but the invention is not limited thereto.
본 발명은 또한 이차전지를 제공하며, 본 발명에 의한 이차전지는 본 발명의 일 실시예에 의한 이차전지 리드탭 실링용 복합가교필름을 포함한다. 좋게는, 본 발명의 일 실시예에 의한 이차전지는 파우치형일 수 있으나, 이차전지의 형상 또는 재질이 본 발명의 범위를 제한하는 것은 아니다. The present invention also provides a secondary battery, wherein the secondary battery according to the present invention includes a composite crosslinked film for sealing a secondary battery lead tab according to an embodiment of the present invention. Preferably, the secondary battery according to an embodiment of the present invention may be of a pouch type, but the shape or material of the secondary battery does not limit the scope of the present invention.
이하 본 발명을 실시예에 의해 구체적으로 설명한다. 아래에서 설명하는 실시예는 발명의 이해를 돕기 위한 것일 뿐, 본 발명이 실시예에 한정되지 않는다.Hereinafter, the present invention will be described in detail with reference to examples. The embodiments described below are only for the understanding of the invention, and the present invention is not limited to the embodiments.
[실시예 1][Example 1]
에틸렌비닐아세테이트(SKC Co., Ltd) , 에틸렌프로필렌디엔 공중합체(SKC Co., Ltd), t-부틸퍼옥시이소프로필카르보네이트 가교제(SKC Co., Ltd) 및 평균 입경이 110㎚인 탄산칼슘을 혼합하여 블렌딩한 후, 입경이 30μm ~ 200μm인 혼합수지 입자를 제조한다. Ethylene vinyl acetate (SKC Co., Ltd), ethylene propylene diene copolymer (SKC Co., Ltd), t-butyl peroxyisopropyl carbonate crosslinking agent (SKC Co., Ltd) and carbonic acid having an average particle diameter of 110 nm Calcium are mixed and blended, and mixed resin particles having a particle diameter of 30 mu m to 200 mu m are produced.
제조된 혼합수지 입자를 30μm ~ 200μm 두께로 압출하여 이차전지 리드탭 실링용 복합가교필름을 제조하였다. The prepared mixed resin particles were extruded to a thickness of 30 μm to 200 μm to prepare a composite crosslinked film for secondary battery lead taps sealing.
[실시예 2][Example 2]
실시예 1과 같은 방법으로 제조하되, 탄산칼슘 대신 평균 입경이 30㎚인 이산화규소분말을 혼합하여 이차전지 리드탭 실링용 복합가교필름을 제조하였다. A composite crosslinked film for secondary battery lead tapped sealing was prepared by mixing the silicon dioxide powder having an average particle size of 30 nm instead of calcium carbonate in the same manner as in Example 1.
[비교예 1][Comparative Example 1]
실시예 1과 같은 방법으로 제조하되, 에틸렌비닐아세테이트(SKC Co., Ltd), 에틸렌프로필렌디엔 공중합체(SKC Co., Ltd) 대신 폴리에틸렌(SKC Co., Ltd)과 에틸렌프로필렌디엔 공중합체(SKC Co., Ltd)만을 혼합하여 혼합수지 입자를 제조하고, 이를 압출하여 가교필름을 제조하였다. (SKC Co., Ltd) and ethylene propylene diene copolymer (SKC Co., Ltd.) instead of ethylene vinyl acetate (SKC Co., Ltd.) and ethylene propylene diene copolymer (SKC Co., Ltd) were prepared in the same manner as in Example 1, Co., Ltd) were mixed to prepare mixed resin particles, which were extruded to prepare a crosslinked film.
제조된 필름의 절연성 측정Measurement of insulation of manufactured film
JIS-C2330 7.4. 11. 2(평판 전극법, B법)에 따라 100℃에서 실시예 및 비교예에 의해 제조된 복합가교필름의 고온 절연파괴강도를 측정하고 표 1로 나타내었다. JIS-C2330 7.4. The high temperature insulation breakdown strength of the composite crosslinked films prepared in Examples and Comparative Examples was measured at 100 ° C according to 11.2 (Flat Plate Electrode Method, Method B) and shown in Table 1.
표 1을 참고하면, 본 발명의 실시예에 의한 리드탭 필름이 고온에서의 절연파괴강도가 우수함을 확인할 수 있다. Referring to Table 1, it can be seen that the lead taps film according to the embodiment of the present invention has excellent insulation breakdown strength at high temperatures.
제조된 필름의 열특성 분석Thermal characterization of manufactured films
실시예 1에서 제조된 복합가교필름을 열분석(TGA/DSC)을 통하여 특성을 확인하고 도 3으로 나타내었다. 도 3을 참고하면, 본 발명의 실시예에 의한 복합가고필름의 녹는점은 140 내지 166 ℃ 이고, 분해온도가 400 ℃로 열적안정성이 우수하며, 이에 따라 리드탭의 실링부재로 적용 시 고온 환경에서도 안정적으로 밀봉이 가능함을 확인할 수 있다. The composite crosslinked film prepared in Example 1 was characterized by thermal analysis (TGA / DSC) and is shown in FIG. Referring to FIG. 3, the composite hanger film according to an embodiment of the present invention has a melting point of 140 to 166 ° C. and a decomposition temperature of 400 ° C., which is excellent in thermal stability. Accordingly, when applied as a sealing member of the lead taps, It can be confirmed that the sealing can be stably performed.
Claims (10)
상기 복합가교필름은 에틸렌비닐아세테이트, 에틸렌프로필렌디엔 공중합체, 가교제 및 평균 입경이 20 내지 200 ㎚인 나노 세라믹 분말을 포함하는 조성물을 열 압출하여 가교된 것이며,
상기 복합가교필름은 상기 나노 세라믹 분말 0.1 내지 10 중량%를 포함하는 이차전지 리드탭 실링용 복합가교필름.A composite crosslinked film for sealing a lead tab of a secondary battery which seals between a lead tab of the secondary battery and a casing,
The composite crosslinked film is crosslinked by thermally extruding a composition comprising ethylene vinyl acetate, an ethylene propylene diene copolymer, a crosslinking agent and a nanoceramic powder having an average particle diameter of 20 to 200 nm,
Wherein the composite crosslinked film comprises 0.1 to 10% by weight of the nanoceramic powder.
상기 나노 세라믹 분말은 이산화규소 및 탄산칼슘에서 선택되는 하나 이상인 이차전지 리드탭 실링용 복합가교필름. The method according to claim 1,
Wherein the nano-ceramic powder is at least one selected from silicon dioxide and calcium carbonate.
상기 복합가교필름은 에틸렌비닐아세테이트 100 중량부에 대하여 20 내지 50 중량부의 에틸렌프로필렌디엔 공중합체를 포함하는 이차전지 리드탭 실링용 복합가교필름. The method according to claim 1,
Wherein the composite crosslinked film comprises 20 to 50 parts by weight of an ethylene propylene diene copolymer per 100 parts by weight of ethylene vinyl acetate.
혼합된 수지 조성물로 혼합수지 입자를 제조하는 단계; 및
상기 혼합수지 입자를 압출하는 단계;를 포함하는 이차전지 리드탭 실링용 복합가교필름 제조방법으로,
상기 복합가교필름은 상기 나노 세라믹 분말 0.1 내지 10 중량%를 포함하는 이차전지 리드탭 실링용 복합가교필름 제조방법.A resin composition comprising ethylene vinyl acetate and an ethylene propylene diene copolymer, a nanoceramic powder having an average particle diameter of 20 to 200 nm, and a peroxide type crosslinking agent;
Preparing mixed resin particles with a mixed resin composition; And
And extruding the mixed resin particles. The method for manufacturing a composite crosslinked film for sealing a lead tab of a secondary battery,
Wherein the composite crosslinked film comprises 0.1 to 10% by weight of the nanoceramic powder.
상기 나노 세라믹 분말은 이산화규소 및 탄산칼슘에서 선택되는 하나 이상인 이차전지 리드탭 실링용 복합가교필름 제조방법. The method according to claim 6,
Wherein the nano-ceramic powder is at least one selected from silicon dioxide and calcium carbonate.
상기 혼합수지 입자를 제조하는 단계에서의 가열은 120℃ 내지 170 ℃에서 수행되는 이차전지 리드탭 실링용 복합가교필름 제조방법. The method according to claim 6,
Wherein the heating in the step of preparing the mixed resin particles is performed at a temperature of 120 to 170 캜.
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| CN201811567097.9A CN109957181A (en) | 2017-12-22 | 2018-12-20 | Secondary cell lead tap sealing composite crosslinking film and preparation method thereof |
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| KR101308682B1 (en) * | 2012-07-05 | 2013-09-13 | 주식회사엘콤 | A lead tap improved insulation, method for manufacturing a lead tap, and electrochemical device containing the same |
| KR101327868B1 (en) * | 2012-11-21 | 2013-11-11 | 율촌화학 주식회사 | Sealing film for lead tab of secondary battery |
| KR20150080655A (en) * | 2013-11-29 | 2015-07-10 | 율촌화학 주식회사 | Sealing film for lead tab of secondary battery and secondary battery including the same |
| CN106554556A (en) * | 2015-09-30 | 2017-04-05 | 明光市奇美橡塑有限公司 | A kind of waterproof and moistureproof sealing part |
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