CN104167514B - 一种高阻隔、耐酸碱的锂电池包装膜 - Google Patents
一种高阻隔、耐酸碱的锂电池包装膜 Download PDFInfo
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- 229910052759 nickel Inorganic materials 0.000 claims description 6
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Abstract
本发明公开了一种高阻隔、耐酸碱的锂电池包装膜,以铝箔为中间基础层,所述铝箔的上表面附着第二纳米气凝胶层;所述第二纳米气凝胶层的上表面附着有聚丙烯与尼龙共聚膜;所述铝箔的下表面附着第一纳米气凝胶层;所述第一纳米气凝胶层的下表面附着有聚丙烯层;所述第一纳米气凝胶层和第二纳米气凝胶层分别由纳米气凝胶涂布在铝箔上,经过加热处理后,再在其外表面用纳米阻隔、绝缘涂布液进行涂布后形成;本发明具有极佳的绝缘、耐冷冲、耐腐蚀、高阻隔、高强度性能。
Description
技术领域
本发明涉及一种汽车、手机、电脑的锂电池使用的电解液包装膜,特别是一种具有极佳的绝缘、耐冷冲、耐腐蚀、高阻隔、高强度的高阻隔、耐酸碱的锂电池包装膜。
背景技术
中国专利(专利号:ZL02163383.6)公开了一种锂电池软包装膜是以普通铝层为基础,其内层聚已内酰胺或聚已二酰已二胺层,外层为普通双向拉伸聚丙烯与尼龙共聚膜,以及其他类似的实用新型专利,它们目前存在的共同功能性的缺陷为:1.铝层经冷冲压成型时容易断裂,造成电解液泄漏。2.阻隔性能差,因聚丙烯与尼龙共聚膜与铝箔层之间力拉伸性能差异,导致冷冲压成型时聚丙烯与尼龙共聚膜与铝层容易分层,从而造成阻隔性能下降。3.铝层的绝缘及耐腐蚀处理不够,导致成型软包装膜绝缘性能差,易产生内层胀气,或被电极击穿。电池废品率高,使用寿命短。以上主要功能性缺陷存在,是目前锂软包装膜一直未能在市场广为应用的主要原因。
发明内容
针对上述存在的技术问题,本发明的目的是:提出了一种具有极佳的绝缘、耐冷冲、耐腐蚀、高阻隔、高强度的高阻隔、耐酸碱的锂电池包装膜。
本发明的技术解决方案是这样实现的:一种高阻隔、耐酸碱的锂电池包装膜,以铝箔为中间基础层,所述铝箔的上表面附着第二纳米气凝胶层;所述第二纳米气凝胶层的上表面附着有聚丙烯与尼龙共聚膜;所述铝箔的下表面附着第一纳米气凝胶层;所述第一纳米气凝胶层的下表面附着有聚丙烯层;所述第一纳米气凝胶层和第二纳米气凝胶层分别由纳米气凝胶涂布在铝箔上,经过加热处理后,再在其外表面用纳米阻隔、绝缘涂布液进行涂布后形成。
优选的,所述聚丙烯与尼龙共聚膜、聚丙烯层分别通过耐酸碱树脂粘结在第二纳米气凝胶层和第一纳米气凝胶层上。
优选的,所述铝箔中加入了锰、镍,所述锰、镍的质量百分比分别为0.01%--0.05%。
优选的,所述聚丙烯与尼龙共聚膜由改性尼龙与聚丙烯共挤而成,改性尼龙与聚丙烯的质量比为2:1-2:1.8。
优选的,所述聚丙烯层为纳米气凝胶与聚丙稀的聚合体,纳米气凝胶与聚丙稀的质量比为0.1:1-0.5:1。
优选的,所述铝箔的厚度为度为30-60微米。
优选的,所述所述聚丙烯与尼龙共聚膜4的厚度为20-35微米。
优选的,所述聚丙烯层的厚度为20-65微米。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:
本发明所述的高阻隔、耐酸碱的锂电池包装膜中的聚丙烯与尼龙共聚膜中由于有聚丙烯的存在,其和铝箔粘合时不但具有极佳的复合牢度,剥离强度达15N/MM,而且使得所述防潮隔热膜冷冲压成型时,铝箔与聚丙烯与尼龙共聚膜之间具有良好的缓冲,不会产生脱膜;同时由于聚丙烯与尼龙共聚膜中,含有改性尼龙,因而其具有良好的强度和阻隔性能;再者,由于本发明中聚丙烯层为纳米气凝胶与聚丙烯的聚合体,聚丙烯层具有极佳的弹性和延伸性能而且还具有极佳的耐腐蚀性能,其和铝箔粘合后,既具有优良的冷冲性能,又具有极佳的热封性和耐腐蚀性能。
附图说明
下面结合附图对本发明技术方案作进一步说明:
附图1为本发明所述的高阻隔、耐酸碱的锂电池包装膜的结构示意图;
其中:1、铝箔;2、第一纳米气凝胶层;3、第二纳米气凝胶层;4、聚丙烯与尼龙共聚膜;5、聚丙烯层。
具体实施方式
下面结合附图来说明本发明。
如附图1所示为本发明所述的一种高阻隔、耐酸碱的锂电池包装膜,以铝箔1为中间基础层,所述铝箔1的上表面附着第二纳米气凝胶层3;所述第二纳米气凝胶层3的上表面附着有聚丙烯与尼龙共聚膜4;所述铝箔1的下表面附着第一纳米气凝胶层2;所述第一纳米气凝胶层2的下表面附着有聚丙烯层5。所述第一纳米气凝胶层2和第二纳米气凝胶层3分别由纳米气凝胶涂布在铝箔1上,经过加热处理后,再在其外表面用纳米阻隔、绝缘涂布液进行涂布后形成;所述第一纳米气凝胶层2和第二纳米气凝胶层3使得制成的防潮隔热膜软具有极佳的绝缘性和耐腐蚀性能,用来包装时所述第一纳米气凝胶层2和第二纳米气凝胶层3不会产生和铝箔1产生导电或胀气等现象。所述聚丙烯与尼龙共聚膜4、聚丙烯层5分别通过耐酸碱树脂粘结在第二纳米气凝胶层3和第一纳米气凝胶层2上。所述铝箔1中加入了锰、镍,所述锰、镍的质量百分比分别为0.01%--0.05%。所述聚丙烯与尼龙共聚膜4由改性尼龙与聚丙烯共挤而成,改性尼龙与聚丙烯的质量比为2:1-2:1.8。所述聚丙烯层5为纳米气凝胶与聚丙稀的聚合体,纳米气凝胶与聚丙稀的质量比为0.1:1-0.5:1。所述铝箔1的厚度为度为30-60微米。所述所述聚丙烯与尼龙共聚膜4的厚度为20-35微米。所述聚丙烯层5的厚度为20-65微米。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:
本发明所述的高阻隔、耐酸碱的锂电池包装膜中的聚丙烯与尼龙共聚膜中由于有聚丙烯的存在,其和铝箔粘合时不但具有极佳的复合牢度,剥离强度达15N/MM,而且使得所述防潮隔热膜冷冲压成型时,铝箔与聚丙烯与尼龙共聚膜之间具有良好的缓冲,不会产生脱膜;同时由于聚丙烯与尼龙共聚膜中,含有改性尼龙,因而其具有良好的强度和阻隔性能;再者,由于本发明中聚丙烯层为纳米气凝胶与聚丙烯的聚合体,聚丙烯层具有极佳的弹性和延伸性能而且还具有极佳的耐腐蚀性能,其和铝箔粘合后,既具有优良的冷冲性能,又具有极佳的热封性和耐腐蚀性能。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并加以实施,并不能以此限制本发明的保护范围,凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围内。
Claims (1)
1.一种高阻隔、耐酸碱的锂电池包装膜,其特征在于:其以铝箔为中间基础层,所述铝箔的上表面附着第二纳米气凝胶层;所述第二纳米气凝胶层的上表面附着有聚丙烯与尼龙共聚膜;所述铝箔的下表面附着第一纳米气凝胶层;所述第一纳米气凝胶层的下表面附着有聚丙烯层;所述第一纳米气凝胶层和第二纳米气凝胶层分别由纳米气凝胶涂布在铝箔上,经过加热处理后,再在其外表面用纳米阻隔、绝缘涂布液进行涂布后形成;所述聚丙烯与尼龙共聚膜、聚丙烯层分别通过耐酸碱树脂粘结在第二纳米气凝胶层和第一纳米气凝胶层上;所述铝箔中加入了锰、镍,所述锰、镍的质量百分比分别为0.01%-0.05%;所述聚丙烯与尼龙共聚膜由改性尼龙与聚丙烯共挤而成,改性尼龙与聚丙烯的质量比为2:1-2:1.8;所述聚丙烯层为纳米气凝胶与聚丙稀的聚合体,纳米气凝胶与聚丙稀的质量比为0.1:1-0.5:1;所述铝箔的厚度为30-60微米;所述聚丙烯与尼龙共聚膜的厚度为20-35微米;所述聚丙烯层的厚度为20-65微米。
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