CN106183300A - 一种表面耐腐蚀的锂电池软包装膜 - Google Patents
一种表面耐腐蚀的锂电池软包装膜 Download PDFInfo
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title claims abstract description 28
- 230000007797 corrosion Effects 0.000 title claims abstract description 28
- 239000012785 packaging film Substances 0.000 title claims abstract description 27
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- 230000003628 erosive effect Effects 0.000 title claims abstract description 21
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- 239000004743 Polypropylene Substances 0.000 claims abstract description 52
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- 238000007789 sealing Methods 0.000 claims abstract description 26
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- 230000001070 adhesive effect Effects 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 16
- 239000005025 cast polypropylene Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 3
- 229920002620 polyvinyl fluoride Polymers 0.000 claims description 3
- 229920001774 Perfluoroether Polymers 0.000 claims description 2
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- 239000003607 modifier Substances 0.000 claims description 2
- 229920009441 perflouroethylene propylene Polymers 0.000 claims description 2
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- 239000010410 layer Substances 0.000 claims 15
- 239000004812 Fluorinated ethylene propylene Substances 0.000 claims 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims 1
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- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
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- 229920005989 resin Polymers 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- 239000011265 semifinished product Substances 0.000 description 5
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 4
- 238000012661 block copolymerization Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
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- 229920006379 extruded polypropylene Polymers 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920002493 poly(chlorotrifluoroethylene) Polymers 0.000 description 3
- 239000005023 polychlorotrifluoroethylene (PCTFE) polymer Substances 0.000 description 3
- FGOJCPKOOGIRPA-UHFFFAOYSA-N 1-o-tert-butyl 4-o-ethyl 5-oxoazepane-1,4-dicarboxylate Chemical compound CCOC(=O)C1CCN(C(=O)OC(C)(C)C)CCC1=O FGOJCPKOOGIRPA-UHFFFAOYSA-N 0.000 description 2
- 229910001290 LiPF6 Inorganic materials 0.000 description 2
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- 229910045601 alloy Inorganic materials 0.000 description 2
- 235000010357 aspartame Nutrition 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 2
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- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003340 mental effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings 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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
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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
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/1245—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the external coating on the casing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/752—Corrosion inhibitor
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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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Abstract
本发明提供了一种表面耐腐蚀的锂电池软包装膜，其特征在于，包括：氟塑料层、铝箔阻隔层和聚丙烯热封层，所述的氟塑料层设于铝箔阻隔层的外侧，聚丙烯热封层设于铝箔阻隔层的内侧。本发明具有良好的耐热性和耐化学腐蚀性，防止电解液腐蚀破坏铝塑膜表层乃至铝塑膜铝箔阻隔层，并具备了较高的阻隔性能，保证了复合膜的阻隔性，使使用软包膜的锂电池更安全。
Description
技术领域
本发明涉及一种复合软包装膜，特别是一种表面耐电解液污染的锂电池软包装膜。
背景技术
常用的锂电池包装材料主要有金属、铝塑膜。相对于金属包装，铝塑膜提供了一种轻便、低成本的包装方式，但也对材料提出了更高的要求。目前常见的铝塑膜一般使用尼龙(PA)做为表层，但是尼龙(PA)遇到锂电池使用的电解液容易被腐蚀也没有阻挡作用，因此一旦铝塑膜表面接触到电解液，就会形成白斑，不仅影响锂电池的外观，严重的也可能会渗透腐蚀阻隔层的铝箔，影响铝塑膜的阻隔性能，导致内容物渗漏甚至爆炸。
发明内容
本发明的目的是提供一种表面耐电解液污染的锂电池软包装膜。
为实现以上目的，本发明的技术方案是：
一种表面耐腐蚀的锂电池软包装膜，其特征在于，包括：氟塑料层、铝箔阻隔层和聚丙烯热封层，所述的氟塑料层设于铝箔阻隔层的外侧，聚丙烯热封层设于铝箔阻隔层的内侧。
优选地，所述的氟塑料层与铝箔阻隔层之间通过胶黏剂粘接。
优选地，所述的铝箔阻隔层与聚丙烯热封层之间通过胶黏剂粘接。
优选地，所述的铝箔阻隔层与聚丙烯热封层之间设有挤出聚丙烯层，铝箔阻隔层与聚丙烯热封层之间通过挤出聚丙烯层复合在一起。
优选地，所述的聚丙烯热封层的材质为流延聚丙烯、挤出聚丙烯或者挤出聚丙烯粘结流延聚丙烯。
优选地，所述的聚丙烯热封层由聚四氟乙烯(PTFE)、全氟(乙烯丙烯)(FEP)共聚物、聚全氟烷氧基(PFA)、聚三氟氯乙烯(PCTFE)、乙烯-三氟氯乙烯共聚物(ECTFE)、乙烯-四氟乙烯(ETFE)共聚物、聚偏氯乙烯(PVDF)、聚氟乙烯(PVF)以及它们的改性物中的至少一种制成。
优选地，所述的氟塑料层的厚度为12-32μm，铝箔阻隔层的厚度为25-60μm，聚丙烯热封层的厚度为20-80μm。
优选地，所述的表面耐腐蚀的锂电池软包装膜的厚度在55-178μm。
优选地，所述的胶黏剂的厚度为3-5μm。
与现有技术相比，本发明的有益效果是：
1、本发明的包装膜具有良好的耐热性和耐化学腐蚀性，防止电解液腐蚀破坏铝塑膜表层乃至铝塑膜铝箔阻隔层，并具备了较高的阻隔性能，保证了复合膜的阻隔性，使使用软包膜的锂电池更安全。
2、本发明的包装膜适合冷冲压成型。
附图说明
图1为实施例1中的表面耐腐蚀的锂电池软包装膜示意图。
图2为实施例2中的表面耐腐蚀的锂电池软包装膜示意图。
具体实施方式
下面结合具体实施例，进一步阐述本发明。应理解，这些实施例仅用于说明本发明而不用于限制本发明的范围。此外应理解，在阅读了本发明讲授的内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。
实施例1
如图1所示，为表面耐腐蚀的锂电池软包装膜示意图，所述的表面耐腐蚀的锂电池软包装膜包括氟塑料层1、铝箔阻隔层2和聚丙烯热封层3，所述的氟塑料层1设于铝箔阻隔层2的外侧，聚丙烯热封层3设于铝箔阻隔层2的内侧，氟塑料层1与铝箔阻隔层2之间通过胶黏剂4粘接。所述的铝箔阻隔层2与聚丙烯热封层3之间通过胶黏剂4粘接。
所述的氟塑料层1选用霍尼韦尔的厚度为19微米的聚三氟氯乙烯(PCTFE)膜，铝箔阻隔层2选用日本东洋铝业的45微米厚的合金型号为8079的O态软质铝箔，聚丙烯热封层3选用45微米厚的自制三层共挤聚丙烯薄膜，胶黏剂4选用汉高的双组份聚氨酯胶黏剂UK3640/UK6800，涂布量为5克每平方米。
上述的表面耐腐蚀的锂电池软包装膜的制备方法为：
步骤1：将氟塑料层1与铝箔阻隔层2采用干式复合法用双组份聚氨酯胶黏剂粘接制得半成品膜，双组份聚氨酯胶黏剂的配比为UK3640(固含量60％)∶UK6800(固含量100％)∶乙酸乙酯＝25∶0.5∶18，胶黏剂工作浓度35.6％
步骤2：自制三层共挤聚丙烯薄膜的制作：
以马来酸酐接枝聚丙烯树脂(日本三井化学QE840)为内层、均聚聚丙烯树脂(中海壳牌的HP510M)为中间层、嵌段共聚聚丙烯(沙特基础工业公司PP673K)与聚丙烯弹性体(埃克森美孚3000)重量比1∶1混合后为外层，内、中间、外三层厚度比为1∶4∶1，螺杆加工温度为240℃至255℃，膜口温度为230℃至245℃，在三层流延共挤机上制作成厚度为45um的三层共挤聚丙烯薄膜，作为流延聚丙烯层3。
步骤3：将半成品膜与内层自制的45微米厚的流延聚丙烯层3采用干式复合法用上述的双组份聚氨酯胶黏剂粘接制得成品膜，双组份聚氨酯胶黏剂配比UK3640(固含量60％)∶UK6800(固含量100％)∶乙酸乙酯＝25∶0.5∶18，胶黏剂工作浓度35.6％
制得的成品进行生产，配置1mol/L LiPF6电解液(溶剂为体积比为1∶1：1的碳酸二甲酯、碳酸乙酯和碳酸二乙酯)，在氟塑料1面滴上5ml的电解液，在45℃的烘箱中放置24小时后，将电解液擦去，氟塑料1面完好，没有发生溶解和腐蚀，也没有颜色变化。
实施例2
如图2所示，为表面耐腐蚀的锂电池软包装膜示意图，所述的表面耐腐蚀的锂电池软包装膜包括氟塑料层1、铝箔阻隔层2和聚丙烯热封层3，所述的氟塑料层1设于铝箔阻隔层2的外侧，聚丙烯热封层3设于铝箔阻隔层2的内侧，氟塑料层1与铝箔阻隔层2之间通过胶黏剂4粘接。所述的铝箔阻隔层2与聚丙烯热封层3之间设有挤出聚丙烯层5，铝箔阻隔层2与聚丙烯热封层3之间通过挤出聚丙烯层5复合在一起。
氟塑料层1选用霍尼韦尔19微米厚的聚三氟氯乙烯(PCTFE)，铝箔阻隔层2选用日本东洋铝业的45微米合金型号为8079的O态软质铝箔，聚丙烯热封层3选用35微米厚的自制共挤聚丙烯薄膜，胶黏剂4选用汉高的双组份聚氨酯胶黏剂UK3640/UK6800，涂布量为5克每平方米，挤出聚丙烯层5采用可以与铝箔粘接的马来酸酐接枝聚丙烯树脂(日本三井化学QF551)，厚度为10微米。
所述的表面耐腐蚀的锂电池软包装膜的制造方法，包括下列步骤：
步骤1：将氟塑料层1和铝箔阻隔层2采用干式复合法用双组份聚氨酯胶黏剂粘接制得半成品膜，双组份聚氨酯胶黏剂配比UK3640(固含量60％)∶UK6800(固含量100％)∶乙酸乙酯＝25∶0.5∶18，胶黏剂工作浓度35.6％。
步骤2：自制三层共挤聚丙烯薄膜的制作：
以嵌段共聚聚丙烯(沙特基础工业公司PP673K)与聚丙烯弹性体(埃克森美孚3000)重量比1∶1混合后为内层、均聚聚丙烯树脂(中海壳牌的HP510M)为中间层、嵌段共聚聚丙烯(沙特基础工业公司PP673K)与聚丙烯弹性体(埃克森美孚3000)重量比1∶1混合后为外层，内、中间、外三层厚度比为1∶3∶1，螺杆加工温℃为240℃至255℃，膜口温度为230℃至245℃，在三层流延共挤机上制作成厚度为35um的聚丙烯薄膜，作为流延聚丙烯层3。
步骤3：将半成品膜与流延聚丙烯层3用马来酸酐接枝聚丙烯树脂(日本三井化学QF551)采用挤出复合法进行复合制得成品膜，马来酸酐接枝聚丙烯树脂设于半成品膜与流延聚丙烯层3之间，厚度为10微米。
制得的成品进行生产，配置1mol/L LiPF6电解液(溶剂为体积比为1∶1：1的碳酸二甲酯、碳酸乙酯和碳酸二乙酯)，在氟塑料1面滴上5ml的电解液，在45℃的烘箱中放置24小时后，将电解液擦去，氟塑料1面完好，没有发生溶解和腐蚀，也没有颜色变化。
Claims (9)
1.一种表面耐腐蚀的锂电池软包装膜，其特征在于，包括：氟塑料层(1)、铝箔阻隔层(2)和聚丙烯热封层(3)，所述的氟塑料层(1)设于铝箔阻隔层(2)的外侧，聚丙烯热封层(3)设于铝箔阻隔层(2)的内侧。
2.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的氟塑料层(1)与铝箔阻隔层(2)之间通过胶黏剂(4)粘接。
3.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的铝箔阻隔层(2)与聚丙烯热封层(3)之间通过胶黏剂(4)粘接。
4.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的铝箔阻隔层(2)与聚丙烯热封层(3)之间设有挤出聚丙烯层(5)，铝箔阻隔层(2)与聚丙烯热封层(3)之间通过挤出聚丙烯层(5)复合在一起。
5.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的聚丙烯热封层(3)的材质为流延聚丙烯、挤出聚丙烯或者挤出聚丙烯粘结流延聚丙烯。
6.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的聚丙烯热封层(3)由聚四氟乙烯、全氟乙烯丙烯共聚物、聚全氟烷氧基、聚三氟氯乙烯、乙烯-三氟氯乙烯共聚物、乙烯-四氟乙烯共聚物、聚偏氯乙烯、聚氟乙烯以及它们的改性物中的至少一种制成。
7.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的氟塑料层(1)的厚度为12-32μm，铝箔阻隔层(2)的厚度为25-60μm，聚丙烯热封层(3)的厚度为20-80μm。
8.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的表面耐腐蚀的锂电池软包装膜的厚度在55-178μm。
9.如权利要求1所述的表面耐腐蚀的锂电池软包装膜，其特征在于，所述的胶黏剂(4)的厚度为3-5μm。
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