CN114192377A - 一种增加锂电池封装用铝塑膜冲壳深度的方法 - Google Patents
一种增加锂电池封装用铝塑膜冲壳深度的方法 Download PDFInfo
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Abstract
为了解决铝塑膜冲壳时冲壳深度严重下降或分层的问题，本发明公开了一种增加锂电池封装用铝塑膜冲壳深度的方法，属于铝塑膜技术领域，本发明通过在铝塑膜PP面上涂布一层芥酸酰胺与丁酮质量比为98~99.8：2~0的混合剂，然后将铝塑膜在低温环境中储存，从而降低铝塑膜表面的摩擦力，增加铝塑膜冲深成型性，减少了恒温恒湿分层概率的发生，提高了锂电池使用的安全性。
Description
技术领域:
本发明涉及锂电池包装技术领域，具体涉及一种增加锂电池封装用铝塑膜冲壳深度的方法。
背景技术:
近年来,随着新能源汽车的快速发展,特别是大容量蓄能,大功率放电的市场需求逐渐增加,特化的软包锂电池因其安全性能好、重量轻、内阻小、设计灵活、相对低的容量衰减速度等优点而逐渐成为市场主流需求之一，使其各方面的应用研究均成为研究热点。软包锂电池所用的封装材料是铝塑膜，主要应用于软包锂电池电芯外包装封装，铝塑膜是软包锂电池封装的关键材料，单片锂电池组装后用铝塑膜密封，形成一个电池，铝塑膜起到保护内容物的作用，铝塑膜作为锂电池产业链中壁垒最高的关键环节，全球铝塑膜市场一直由日本少数企业垄断，我国铝塑膜大部分依赖进口，国内企业也正在加快铝塑膜的开发和生产，但是国产铝塑膜易出现冲壳深度不够，冲壳冲破的不良现象。
发明内容:
针对现有技术的不足,本发明提供了一种增加锂电池封装用铝塑膜冲壳深度的方法，该方法工艺简单，其步骤如下：
(1)将芥酸酰胺与丁酮按照一定的比例混合,混合均匀后得到混合剂；
(2)将混合剂放入加热装置中进行加热一段时间；
(3)加热完成后,使用网纹辊涂布将混合剂涂布在铝塑膜PP面上，经过烘箱烘烤处理后收卷得到成品；
(4)将烘烤处理后的铝塑膜进行储存。
优选的，步骤(1)中芥酸酰胺与丁酮的质量比为98-99.8:0.2-2。
优选的，步骤(2)中加热装置的温度为70-80℃，加热时间为0.5-1小时。
优选的，步骤(3)中网纹辊目数为200-300目，混合剂的涂布量为2-8g/㎡。
优选的，步骤(3)中烘烤处理的温度为40-80℃。
优选的，步骤(4)中铝塑膜储存温度为15-25℃。
与现有技术相比，本发明具有以下优点和有益效果：
(1)本发明方法使用低温40-80℃的烘箱，减少了生产能耗，降低了生产成本。
(2)本发明方法通过对混合剂加热(70-80℃)的方式，改善了低温环境下混合剂中的晶体析出状况，增加了涂布的均匀性。
(3)本发明方法通过降低储存温度(15-25℃)的方法，使材料中的芥酸酰胺在低温下从膜的内面迁移到膜表面的凹坑中，降低了铝塑膜表面的摩擦力，增加了铝塑膜冲深成型性，减少了恒温恒湿分层概率的发生，提高了锂电池使用的安全性。
具体实施方式：
一种增加锂电池封装用铝塑膜冲壳深度的方法，其步骤如下：
(1)将芥酸酰胺与丁酮按照一定的比例混合,混合均匀后得到混合剂；
(2)将混合剂放入加热装置中进行加热一段时间；
(3)加热完成后,使用网纹辊涂布将混合剂涂布在铝塑膜PP面上，经过烘箱烘烤处理后得到成品。
(4)将成品的铝塑膜进行储存。
其中，步骤(1)中芥酸酰胺与丁酮的质量比为98-99.8:0.2-2。
其中，步骤(2)中加热装置的温度为70-80℃，加热时间为0.5-1小时。
其中，步骤(3)中网纹辊目数为200-300目，混合剂的涂布量为2-8g/㎡。
其中，步骤(3)中烘烤处理的温度为40-80℃。
其中，步骤(4)中铝塑膜储存温度为15-25℃。
下面结合具体实施例对本发明作进一步的解释和说明。
实施例1
一种增加锂电池封装用铝塑膜冲壳深度的方法，其步骤如下：
(1)将芥酸酰胺与丁酮按照98:2的比例混合,混合均匀后得到混合剂；
(2)将混合剂放入加热装置中进行加热一段时间，加热装置温度为80℃，加热时间为1小时；
(3)加热完成后,使用200目的网纹辊涂布将混合剂涂布在铝塑膜PP面上，混合剂的涂布量为6g/㎡，经过温度为60℃的烘箱烘烤处理后得到成品。
(4)将成品的铝塑膜在温度20℃的环境中进行储存。
实施例2
将熟化的铝塑膜成品不涂混合剂，测试摩擦力及冲壳深度。
对比例1
对比例1为国内外现有技术样品，结构为：PA薄膜25μm/第一胶粘剂层4μm/带钝化层的铝箔层40μm/第二胶粘剂层4μm/流延聚丙烯40μm。
将实施例和对比例的成品铝塑膜分别切成切成17*17mm正方形和25*50mm样条，用摩擦力测试仪进行摩擦力测试(PP面对PP面摩擦，PA面对PA面摩擦)，记录摩擦力数据，然后进行冲壳测试和恒温恒湿测试，同样记录数据。
实施例与对比例的摩擦力检测数据如表1。
表1
实施例与对比例的冲壳测试结果如表2。
表2
从实施例1、实施例2和对比例1的检测结果来看：
从摩擦力看实施例1最高，实施例2与对比例1接近，从冲壳深度看，实施例1与对比例1冲壳深度一致，都在9mm，实施例2最低，在7.6mm，因此，本发明方法能大大增加铝塑膜的冲壳深度。
最后说明的是,以上实施例仅用以说明本发明的技术方案而非限制,尽管参照最佳实施例对本发明进行了详细说明,本领域的普通技术人员应当理解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本技术方案的宗旨和范围,其均应涵盖在本发明的权利要求范围中。
Claims (6)
1.一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于,包括以下步骤：
（1）将芥酸酰胺与丁酮按照一定的比例混合,混合均匀后得到混合剂；
（2）将混合剂放入加热装置中进行加热一段时间；
（3）加热完成后,使用网纹辊涂布将混合剂涂布在铝塑膜PP面上，经过烘箱烘烤处理后收卷得到成品；
（4）将烘烤处理后的铝塑膜进行储存。
2.根据权利要求1所述的一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于，步骤（1）中芥酸酰胺与丁酮的质量比为98-99.8:0.2-2。
3.根据权利要求1所述的一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于，步骤（2）中加热装置的温度为70-80℃，加热时间为0.5-1小时。
4.根据权利要求1所述的一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于，步骤（3）中网纹辊目数为200-300目，混合剂的涂布量为2-8g/㎡。
5.根据权利要求1所述的一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于，步骤（3）中烘烤处理的温度为40-80℃。
6.根据权利要求1所述的一种增加锂电池封装用铝塑膜冲壳深度的方法，其特征在于，步骤（4）中铝塑膜储存温度为15-25℃。
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| CN111761913A (zh) * | 2020-06-30 | 2020-10-13 | 常州斯威克光伏新材料有限公司 | 一种有色铝塑复合膜的制备方法 |
| CN112018276A (zh) * | 2020-08-21 | 2020-12-01 | 苏州新景新材料科技有限公司 | 一种改善铝塑膜冲深性能的方法 |
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| WO2023226291A1 (zh) * | 2022-05-27 | 2023-11-30 | 珠海市赛纬电子材料股份有限公司 | 一种锂离子电池用铝塑复合膜及其制备方法 |
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