CN105529413A - 一种聚合物锂离子电池应用双铝层型铝塑膜 - Google Patents
一种聚合物锂离子电池应用双铝层型铝塑膜 Download PDFInfo
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- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B—PERFORMING OPERATIONS; TRANSPORTING
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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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Abstract
本发明涉及一种聚合物锂离子电池应用双铝层型铝塑膜。该铝塑膜包括聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层,其由内到外依次为聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层。本发明采用在内层铝箔层的外层增加铝箔与树脂的复合膜层可有效提高内层铝箔的阻隔和耐磨性能,是一种高阻隔型铝塑膜,可应用于聚合物锂离子电池。
Description
技术领域
本发明涉及电池包装材料领域,特别涉及一种聚合物锂离子电池应用双铝层型铝塑膜。
背景技术
锂离子电池由于其重量轻、容量大、循环寿命长(大于1000次)以及无记忆效应的优势很快在手机、笔记本电脑等电池应用领域快速扩展,同时由于锂离子电池的独特优势,已在动力电池及储能电池领域有所应用。
聚合物电池具有比液态锂离子电池更轻重量、电压高、容量大、寿命长、自放电低、无记忆效应和安全性等更多优势,近几年随着其在iPhone、iPad、Ultrabook等3C产品的广泛应用,加之锂离子电池电动汽车的开发,聚合物锂离子电池的应用也快速增加,由于铝塑膜是锂离子电池软包装重要的外包装材料,相应也带动了铝塑膜需求量的快速增长。
由于锂离子电池中的电解液有六氟磷酸铝等含氟类物质,这些含氟化合物对水具有非常强的敏感性,电解液遇水很容易生成强腐蚀性氢氟酸和其他气体,其将会对铝塑膜的热封和材料造成腐蚀,严重影响电池的循环次数和使用寿命,导致电池快速失效,因此铝塑膜需有优异的阻隔性能,阻隔外界环境的水汽、氧气等因素对电解液的破坏。同时,电池的铝塑膜外层需能抵抗电池加工过程中跌落造成的破坏,需铝塑膜外层具有优异的耐磨性能。如何改进铝塑膜的耐磨性能、阻隔性能及其他相关性能对提升聚合物锂离子电池质量是十分关键的科学技术问题。
发明内容
为解决上述技术问题,本发明提供一种聚合物锂离子电池应用双铝层型铝塑膜,该铝塑膜具有优异的阻隔性能及耐磨性能,可提高电池的使用寿命。
本发明的技术方案为:一种聚合物锂离子电池应用双铝层型铝塑膜。该铝塑膜包括聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层,其由内到外依次为聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层。
作为本发明的一种优选方案,所述聚丙烯层材料为聚丙烯、聚丙烯与聚乙烯共挤物、聚丙烯与环烯烃类共挤物中的一种,所述聚丙烯层厚度为10~80μm。
作为本发明的一种优选方案,所述粘结层材料为热熔胶膜、胶粘剂、水溶胶中的一种或几种,所述粘结层厚度为0.01-30μm。
作为本发明的一种优选方案,所述粘结层的固化方式为热固化、紫外固化和电子束固化中的一种或几种组合。
作为本发明的一种优选方案,所述树脂膜层材料为聚乙烯、聚丙烯、聚酰胺纤维膜、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二酯、环烯烃类共聚物、含氟聚合物膜中的一种或几种组合,所述树脂膜层厚度为3~30μm。
作为本发明的一种优选方案,所述铝箔层的厚度为10-60μm,铝箔材料表面可用化学处理、等离子体处理、物理处理中的一种或几种。
采用上述技术方案后,本发明的有益效果:首先,该铝塑膜采用双层铝的结构设计可有效提高铝塑膜的阻隔性能;其次,该铝塑膜外层铝膜表面复合一层树脂膜可有效提高铝塑膜的耐磨性能,从而使该铝塑膜具有优异的阻隔性能和耐磨性能。
附图说明
图1为本发明的结构示意图。
1.聚丙烯层;2.粘结层;3.铝箔层;4.粘结层;5.树脂膜层;6.粘结层;7.铝箔层;8.粘结层;9.树脂膜层。
具体实施方式
下面结合具体实施方式,进一步阐明本发明。
实施例
如图1所示,本发明提供了一种聚合物锂离子电池应用双铝层型铝塑膜,包括1.聚丙烯层、2.粘结层、3.铝箔层、4.粘结层、5.树脂膜层、6.粘结层、7.铝箔层、8.粘结层、9.树脂膜层。
所述聚丙烯层1的材料为聚丙烯、聚丙烯与聚乙烯共挤物、聚丙烯与环烯烃类共挤物中的一种,所述聚丙烯层厚度为10~80μm。
所述粘结层2、粘结层4、粘结层6和粘结层8的材料为热熔胶膜、胶粘剂、水溶胶中的一种或几种,所述粘结层厚度为0.01-30μm,所述粘结层的固化方式为热固化、紫外固化和电子束固化中的一种或几种组合。
所述铝箔层3、铝箔层7的厚度为10-60μm,铝箔材料表面可用化学处理、等离子体处理、物理处理中的一种或几种。
所述树脂膜层5和树脂膜层9的材料为聚乙烯、聚丙烯、聚酰胺纤维膜、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二酯、环烯烃类共聚物、含氟聚合物膜中的一种或几种组合,所述树脂膜层厚度为3~30μm。
本发明的产品经过测定达到以下指标:
1.剥离强度测试:电解液浸泡85℃、1天,膜层间剥离强度大于等于8N/15mm。
2.抗渗透性测试:在60℃的水中浸泡3天,无分层,重量变化小于0.05克。
3.深冲性能测试,深冲深度达到6mm以上。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以作出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (6)
1.一种聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层,其由内到外依次为聚丙烯层、粘结层、铝箔层、粘结层、树脂膜层、粘结层、铝箔层、粘结层、树脂膜层。
2.根据权利要求1中所述的聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,聚丙烯层材料为聚丙烯、聚丙烯与聚乙烯共挤物、聚丙烯与环烯烃类共挤物中的一种,所述聚丙烯层厚度为10~80μm。
3.根据权利要求1中所述的聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,粘结层材料为热熔胶膜、胶粘剂、水溶胶中的一种或几种,所述粘结层厚度为0.01-30μm。
4.根据权利要求3中所述的聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,粘结层的固化方式为热固化、紫外固化和电子束固化中的一种或几种组合。
5.根据权利要求1中所述的聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,所述树脂膜层材料为聚乙烯、聚丙烯、聚酰胺纤维膜、聚对苯二甲酸乙二醇酯、聚对苯二甲酸丁二酯、环烯烃类共聚物、含氟聚合物膜中的一种或几种组合,所述树脂膜层厚度为3~30μm。
6.根据权利要求1中所述的聚合物锂离子电池应用双铝层型铝塑膜,其特征在于,所述铝箔层的厚度为10-60μm,铝箔材料表面可用化学处理、等离子体处理、物理处理中的一种或几种。
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108527970A (zh) * | 2017-03-03 | 2018-09-14 | 深圳市金瑞诚电子有限公司 | 一种用于锂离子电池的铝塑膜 |
CN109037499A (zh) * | 2018-07-27 | 2018-12-18 | 杭州中齐新材料科技有限公司 | 一种新能源汽车锂电池用软包装材料 |
CN110358466A (zh) * | 2019-07-10 | 2019-10-22 | 深圳市美信电子有限公司 | 一种抗氧化锡箔胶带及其制备方法 |
CN111430580A (zh) * | 2020-03-31 | 2020-07-17 | 苏州锂盾储能材料技术有限公司 | 一种双pp-al组合型铝塑膜及其制造方法 |
CN114552081A (zh) * | 2021-12-14 | 2022-05-27 | 万向一二三股份公司 | 一种高安全性锂电池软包铝塑膜 |
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CN108527970A (zh) * | 2017-03-03 | 2018-09-14 | 深圳市金瑞诚电子有限公司 | 一种用于锂离子电池的铝塑膜 |
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CN111430580A (zh) * | 2020-03-31 | 2020-07-17 | 苏州锂盾储能材料技术有限公司 | 一种双pp-al组合型铝塑膜及其制造方法 |
CN114552081A (zh) * | 2021-12-14 | 2022-05-27 | 万向一二三股份公司 | 一种高安全性锂电池软包铝塑膜 |
CN114552081B (zh) * | 2021-12-14 | 2023-08-15 | 万向一二三股份公司 | 一种高安全性锂电池软包铝塑膜 |
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