CN109346649B - 一种锂离子电池用隔膜涂覆工艺 - Google Patents

一种锂离子电池用隔膜涂覆工艺 Download PDF

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CN109346649B
CN109346649B CN201811228036.XA CN201811228036A CN109346649B CN 109346649 B CN109346649 B CN 109346649B CN 201811228036 A CN201811228036 A CN 201811228036A CN 109346649 B CN109346649 B CN 109346649B
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王晓明
魏凤杰
陈志坚
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Jiangsu Zhuogao New Material Technology Co Ltd
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Abstract

本发明公开了一种锂离子电池用隔膜涂覆工艺,包括以下步骤:A、浆料制备:浆料主组分放入搅拌机中初始搅拌,再放入研磨装置中进行研磨,研磨完成后,浆料依据配方加入添加剂搅拌。整个过程中水冷降温;B、涂覆装置制作:根据需要将金属箔材卷曲焊接形成金属软管,再将金属软管雕刻出网孔;C、涂覆:将制备好的浆料,倒入上述的金属软管中,在金属软管内设置刮刀,通过电机带动金属软管转动,刮刀将金属软管内的浆料均匀刮向网孔,浆料通过网孔附着到隔膜上,完成涂覆;D、烘烤:最后将涂覆了浆料的隔膜放入烤箱中烘干,烤箱温度控制在45℃~55℃。本发明设计合理、操作便利,可以使隔膜涂覆更加均匀,降低材料的使用成本。

Description

一种锂离子电池用隔膜涂覆工艺
技术领域
本发明涉及隔膜涂覆技术领域,具体涉及一种锂离子电池用隔膜涂覆工艺。
背景技术
隔膜在锂离子电池中主要起到隔离正负极,同时作为锂离子通道的作用。对电池的安全性影响显著。随着应用对于锂离子电池的重量体积密度和容量体积密度的要求越来越高,隔膜也逐步越做越薄,隔膜涂覆逐步成为趋势。传统的隔膜涂覆工艺中,隔膜的涂覆多数采用凹版辊进行涂覆,但使用凹版辊涂覆时,因为浆料置于凹版辊的外表面,需要滚动凹版辊将浆料涂覆到隔膜上,容易使浆料掉落在隔膜上,导致隔膜的涂覆厚度不均匀,也增加了浆料的使用量,提高了材料成本。
发明内容
针对上述现有技术的缺陷,本发明提供一种锂离子电池用隔膜涂覆工艺,设计合理、操作便利,可以使隔膜涂覆更加均匀,降低材料的使用成本。
为实现上述目的,本发明所采用的技术方案是:
一种锂离子电池用隔膜涂覆工艺,包括以下步骤:
A、浆料制备:先将浆料主成分放入搅拌机中初搅拌,再将搅拌完成后的浆料放入研磨装置中进行研磨,出料以能过100目过滤网为准,研磨完成后再加入添加剂搅拌,调整粘度再过磁粉过滤器出料,整个过程中水冷降温,料温控制在30℃以下;
B、涂覆装置制作:将金属箔材卷曲焊接形成金属软管,再将金属软管雕刻出网孔,在金属软管两端粘结传动用的端轴,由电机带动,所述网孔的直径为0.25mm~0.5mm,所述网孔在金属软管上的覆盖率为7%~30%,相邻两个所述网孔之间的中心距为0.5mm~2mm;
C、涂覆:将制备好的浆料,倒入上述的金属软管中,在金属软管内设置刮刀,通过电机带动金属软管转动,刮刀将金属软管内的浆料均匀刮向网孔,在隔膜走带的过程中,浆料通过网孔流到隔膜上,完成涂覆,浆料的涂覆厚度为2~8μm;
D、烘烤:最后将涂覆了浆料的隔膜放入烤箱中烘干,烤箱温度控制在45℃~55℃,烘烤时间为12~20秒。
上述说明中,作为优选,所述步骤A中研磨装置的转速调整到1500RPM以下。
上述说明中,作为优选,所述步骤B中金属箔材为镍金属或不锈钢材质,其厚度为30~100μm。
上述说明中,作为优选,所述步骤C中隔膜的走带速度为30~120米/分钟。
上述说明中,所述步骤C中的金属软管左右两端设有连接头,所述连接头上设有传动齿轮,电机通过传动齿轮带动金属软管转动。
上述说明中,作为优选,所述步骤C中还包括用于安装金属软管的安装底座,所述安装底座上设有用于安装刮刀的安装架。
本发明所产生的有益效果是:将浆料放入金属软管的内部,通过金属软管内部的刮刀将浆料从网孔中向外挤出,完成涂覆,涂覆方式更加先进,浆料涂覆更加均匀,根据需求封堵部分网孔,可以实现隔膜的不同图案的涂覆效果,减少了材料成本。
为更清楚地阐述本发明的结构特征、技术手段及其所达到的具体目的和功能,下面结合附图与具体实施例来对本发明作进一步详细说明:
附图说明
图1:为本发明之实施例的涂覆装置组装结构示意图;
图2:为本发明之实施例的涂覆装置剖视图;
图3:为本发明之实施例的涂覆装置分解结构示意图;
附图标识说明:10-金属软管,11-网孔,20-连接头,21-传动齿轮,30-刮刀,40-安装底座,41-安装架,50-隔膜。
具体实施方式
如图1-3所示,一种锂离子电池用隔膜50涂覆工艺,包括以下步骤:
A、浆料制备:先将浆料主成分放入搅拌机中初搅拌,再将搅拌完成后的浆料放入研磨装置中进行研磨,出料以能过100目过滤网为准,研磨完成后再加入添加剂搅拌,调整粘度再过磁粉过滤器出料,整个过程中水冷降温,料温控制在30℃以下;
B、涂覆装置制作:将金属箔材卷曲焊接形成金属软管10,再将金属软管10雕刻出网孔11,所述金属箔材为镍金属,其厚度为30~100μm,在金属软管10两端粘结传动用的端轴,由电机带动,所述网孔11的直径为0.25mm~0.5mm,所述网孔11在金属软管上的覆盖率为7%~30%,相邻两个所述网孔11之间的中心距为0.5mm~2mm;
C、涂覆:将制备好的浆料,倒入上述的金属软管10中,在金属软管10内设置刮刀30,金属软管10左右两端设有连接头20,所述连接头20上设有传动齿轮21,电机通过传动齿轮21带动金属软管10转动,刮刀30将金属软管10内的浆料均匀刮向网孔11,在隔膜50走带的过程中,隔膜50的走带速度为30~120米/分钟,浆料通过网孔11附着到隔膜50上,完成涂覆,浆料的涂覆厚度为2~8um;
D、烘烤:最后将涂覆了浆料的隔膜50放入烤箱中烘干,烤箱温度控制在45℃~55℃,烘烤时间为12~20秒。
所述步骤C中还包括用于安装金属软管10的安装底座40,所述安装底座40上设有用于安装刮刀30的安装架41。
需要说明的是,所述步骤B中金属箔材也可以为不锈钢材质。
以上所述,仅是本发明的较佳实施例而已,并不用以限制本发明,故凡是依据本发明的技术实际对以上实施例所作的任何修改、等同替换、改进等,均仍属于本发明技术方案的范围内。

Claims (6)

1.一种锂离子电池用隔膜涂覆工艺,其特征在于:包括以下步骤:
A、浆料制备:先将浆料主成分放入搅拌机中初搅拌,再将搅拌完成后的浆料放入研磨装置中进行研磨,出料以能过100目过滤网为准,研磨完成后再加入添加剂搅拌,调整粘度再过磁粉过滤器出料,整个过程中水冷降温,料温控制在30℃以下;
B、涂覆装置制作:将金属箔材卷曲焊接形成金属软管,再将金属软管雕刻出网孔,在金属软管两端粘结传动用的端轴,由电机带动,所述网孔的直径为0.25mm~0.5mm,所述网孔在金属软管上的覆盖率为7%~30%,相邻两个所述网孔之间的中心距为0.5mm~2mm;
C、涂覆:将制备好的浆料,倒入上述的金属软管中,在金属软管内设置刮刀,通过电机带动金属软管转动,刮刀将金属软管内的浆料均匀刮向网孔,在隔膜走带的过程中,浆料通过网孔附着到隔膜上,完成涂覆,浆料的涂覆厚度为2~8μm;
D、烘烤:最后将涂覆了浆料的隔膜放入烤箱中烘干,烤箱温度控制在45℃~55℃,烘烤时间为12~20秒。
2.根据权利要求1所述的一种锂离子电池用隔膜涂覆工艺,其特征在于:所述步骤A中研磨装置的转速调整到1500RPM以下。
3.根据权利要求1所述的一种锂离子电池用隔膜涂覆工艺,其特征在于:所述步骤B中金属箔材为镍金属或不锈钢材质,其厚度为30~100μm。
4.根据权利要求1所述的一种锂离子电池用隔膜涂覆工艺,其特征在于:所述步骤C中隔膜的走带速度为30~120米/分钟。
5.根据权利要求4所述的一种锂离子电池用隔膜涂覆工艺,其特征在于:所述步骤C中的金属软管左右两端设有连接头,所述连接头上设有传动齿轮,电机通过传动齿轮带动金属软管转动。
6.根据权利要求4所述的一种锂离子电池用隔膜涂覆工艺,其特征在于:所述步骤C中还包括用于安装金属软管的安装底座,所述安装底座上设有用于安装刮刀的安装架。
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