CN116802712A - 二次电池用电极的缺陷部分标记用标签及其制造方法 - Google Patents

二次电池用电极的缺陷部分标记用标签及其制造方法 Download PDF

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CN116802712A
CN116802712A CN202280010225.8A CN202280010225A CN116802712A CN 116802712 A CN116802712 A CN 116802712A CN 202280010225 A CN202280010225 A CN 202280010225A CN 116802712 A CN116802712 A CN 116802712A
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label
release paper
layer
color
adhesive
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CN116802712B (zh
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赵银美
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  • Electrochemistry (AREA)
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  • Secondary Cells (AREA)
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Abstract

本发明涉及二次电池用电极的缺陷部分标记用标签及其制造方法，具体地说，可以简便地粘贴到通过自动化工艺生产的二次电池用电极中存在缺陷的地而标记电极的缺陷部分的标记用标签被标签自动供给器供给时，为了使被设置在自动供给装置的光传感器无错误地识别离型纸和标记用标签并自动供给标记用标签，被涂敷与标记用标签的颜色形成对比的颜色的离型纸与标记用标签该合并。本发明的标记用标签及其制造方法采用涂敷了具有光传感器对比白色系的标签颜色能够明确识别的颜色的离型纸，对比黑色电极，使用白色等亮色的标签时，能够给用户提供视觉上的便利及明确的识别力，并且标签自动供给装置也能明确地识别标签和离型纸，解决了因传感器的识别错误导致标签的自动供给不顺畅的问题。

Description

二次电池用电极的缺陷部分标记用标签及其制造方法
技术领域
本发明涉及二次电池用电极的缺陷部分标记用标签及其制造方法，更具体地说，涉及一种合并涂敷有与标记用标签的颜色形成对比的颜色的离型纸和标记用标签而形成的二次电池用电极的缺陷部分标记用标签及其制造方法，从而当通过标签自动供给器供给可以简便地粘贴到通过自动化工艺生产的二次电池用电极中被识别为存在缺陷的位置来标记电极的缺陷部分的标记用标签时，使被设置在自动供给装置的光传感器无错误地识别离型纸和标记用标签并自动供给标记用标签。
背景技术
一般而言，将活性物质、导电材料及粘结剂涂敷到具有较薄厚度的薄板形的集电体后，将其干燥来制造二次电池用电极。制造薄板形的二次电池用电极时，在集电体表面涂敷活性物质等，会使得外部杂质混入而导致缺陷或活性物质等未均匀地涂敷到集电体的表面时，会出现自身缺陷等问题。因此，在制造二次电池用电极之后，总是将其先卷绕在卷绕辊后再解开，然后确认整体表面是否存在缺陷并标记，然后将其再次卷绕到另一个卷绕辊进行包装或转移到切割工艺，从而去除标记在表面上的缺陷部分，仅使用正常的电极部分。
另外，随着二次电池用电极的需求增加，引进了自动化生产工艺，为了在自动化生产工艺中容易地标记二次电池用电极的表面上产生的缺陷部分，同时防止因粘合剂而产生的新的缺陷，本申请人的在先专利1中已公开一种二次电池用电极的缺陷部分识别用标签，将粘合剂的量及粘附层的位置调整到最佳，使薄板形的二次电池用电极表面和背面能够引起二次损伤或缺陷的可能性最小化。
但是，在先专利1中公开的标签的制造工艺复杂，制造成本较高，而且标签本身的厚度也相当厚，因此考虑到一次性标记二次电池用电极的缺陷部分之后被丢弃这一点，需要开发一种能够保留防止粘合剂泄漏的现有标签的优点且更简便、更低廉的二次电池用电极的缺陷部分标记用标签。
另外，近来随着二次电池用电极生产工艺的自动化，不仅是电极的生产工艺，用于识别电极缺陷部分而粘贴的标签或标贴的供给装置也呈现自动化趋势。当验收员确认被识别为电极有缺陷的部分而使用一张自动供给的识别用标签或标贴后，将自动供给下一张标签或标贴，通常使用能够识别标签或标贴和离型纸的光传感器。一般而言，二次电池用电极是黑色等暗色，因此优选地，贴在生产的电极中有缺陷的部分而识别缺陷部分的标签或标贴主要使用白色等浅色系的颜色。但是，标签或标贴是以局部形成粘附层的状态被贴在离型纸上制造并供给，此时使用的离型纸主要以天蓝色或白色为基色的情况较多，因此安装在自动供给标签的供给装置上的光传感器无法很好地区分标签和离型纸，常常导致供给出现差错或传感器识别错误的情况。
因此，需要在离型纸上涂敷与标签不同的颜色后使用，但现有的离型纸已在表面进行了硅涂敷处理等，因此很难通过后加工涂敷颜色，而且在用作离型纸的基片上涂敷一定颜色后立即进行硅涂敷处理时，会出现无法较好地进行硅涂敷或涂敷后翘起导致色层分离或剥离的问题。因此，作为二次电池用电极的缺陷部分识别用标签或标贴，要使用白色等亮色系颜色时，有必要开发一种涂敷了标签自动供给装置的光传感器易于识别的颜色的离型纸，还需要开发一种标签和离型纸的颜色具有明显差异的二次电池用电极的缺陷部分标记用标签及其制造方法，从而自动供给标签的装置上的光传感器能够明确区分并识别离型纸和标签。
在先专利文献
在先专利1：韩国授权专利第10-1330880号(2013.11.12.授权)
发明内容
要解决的技术问题
本发明为了解决前述的现有技术的问题及局限而提出，其目的在于，提供一种二次电池用电极的缺陷部分标记用标签及其制造方法，自动供给用于识别通过自动化生产工艺生产的二次电池用电极的缺陷部分的标签时，使得设置在标签自动供给装置上的光传感器能够明确识别被供给的离型纸和标签，避免发生因传感器识别错误导致自动供给不顺畅的问题。
并且，本发明的另一目的在于，提供一种结构相比现有的识别用标签简单而容易制造且便于标签用户使用，价格也比现有识别用标签低廉的二次电池用电极的缺陷部分标记用标签及其制造方法。
解决问题的手段
本发明的二次电池用电极的缺陷部分标记用标签的特征在于，包括：离型纸，通过依次层叠离型纸用基纸、在离型纸用基纸的表面涂敷一定的颜色而形成的离型纸彩色层、在离型纸彩色层的表面涂敷透明材料的粘合剂而形成的离型纸粘合剂层、在离型纸粘合剂层的表面粘贴透明的聚对苯二甲酸乙二醇酯(PET)薄膜而形成的离型纸PET薄膜层以及在离型纸PET薄膜层的表面涂敷硅树脂而形成的硅树脂层而形成；粘合剂层，在离型纸的硅树脂层的表面局部涂敷丙烯酸系粘合剂而形成，其厚度为5～30μm；及薄膜形的标签用薄膜，相当于整体面积的25～50％的一侧部分的背面被粘附到粘合剂层而一体式结合，由具有与离型纸彩色层形成对比的其他颜色的合成树脂材料形成。
其中，优选地，所述标签用薄膜的材料是聚对苯二甲酸乙二醇酯(PET)，所述标签用薄膜的厚度为25～50μm。对二次电池用电极进行是否存在缺陷部分的检查后，即使以将标记用标签贴在缺陷部分的状态卷绕电极而保管，具有25～50μm的较薄厚度的PET材质的标签在被卷绕的状态下因卷绕时被施加的压力以及重量而与电极一同被压，也对电极造成最小的影响。
另外，所述离型纸彩色层的颜色为红色或黄色，所述标签用薄膜的颜色为白色，因为标签自动供给装置中作为区分并识别标签和离型纸的传感器而使用颜色传感器或红外线传感器等光传感器时识别率最佳，不会使自动供给出现差错。
另外，离型纸PET薄膜采用透明的薄膜且为了使传感器更加有效地识别涂敷在基纸上的离型纸彩色层，优选地，涂敷在离型纸彩色层的表面的离型纸粘合剂层也使用透明材料的粘合剂。
另外，优选地，构成离型纸的要素中，所述离型纸粘合剂层的厚度为10～15μm，所述离型纸PET薄膜层的厚度为16～25μm，这是为了使传感器有效识别颜色且卷绕供应本发明的标记用标签时其厚度不会变得太厚。优选地，基纸采用表面有光泽的60g/m2规格的较薄的美术纸。
构成本发明的标记用标签的要素中，形成粘合剂层的材料即粘合剂使用丙烯酸系树脂。其中，丙烯酸系树脂可以使用可去除树脂或永久性树脂。因为，通常判定为缺陷部分而粘贴标记用标签的电极以粘贴标记用标签的状态一同废弃，不是必需要使用丙烯酸系可去除树脂。丙烯酸系树脂是使丙烯酸单体产生聚合反应形成的粘合剂，是以丙烯酸系高分子为主体的粘合剂。优选地，使用丙烯酸酯、甲基丙烯酸酯。但是，对大范围表面的粘附力较高且为了防止因粘附时粘合剂泄漏而再次导致电极缺陷，进一步优选地，采用丙烯酸系可去除树脂。另外，关于本发明要求的粘合剂的粘附力数值，优选地，测定机构以90度的角度去除粘附的产品时，其为100～800gr/25mm，以180度的角度去除粘附的产品时，其为100～1400gr/25mm。
构成本发明的标记用标签的要素中，为了识别所述粘合剂层存在于背面的部分的界线，标签用薄膜的表面还包括以实线或波线的形态标记一个以上的粘合剂引导线。
粘合剂引导线的用途在于，当检查电极是否存在缺陷部分的验收员在电极的缺陷部分粘贴标记用标签时，使其容易地识别粘合剂粘附在标签用薄膜的背面的哪一部分，提供用户便利性，识别标记用标签的传感器能够容易地识别粘贴的标签。
另外，根据本发明的标记用标签，所述离型纸中不存在粘合剂层的部分还包括沿着长度方向局部切割而以实线或波线形态形成的排气线。排气线因不存在粘合剂层而空隙里会有空气，卷绕保管被粘贴到离型纸的标记用标签时，其厚度会因粘合剂层的存在与否而变得不同，为了使其均衡，要排出没有粘合剂层的部分存在的空气。
作为本发明另一方面的二次电池用电极的缺陷部分标记用标签的制造方法的特征在于，包括如下步骤：基纸准备步骤，准备离型纸所使用的基纸；离型纸彩色层形成步骤，在准备的基纸的表面涂敷一定的颜色后，将其干燥而形成离型纸彩色层；离型纸粘合剂涂敷步骤，在形成的离型纸彩色层的表面涂敷透明的丙烯酸系永久粘合剂而形成离型纸粘合剂层；离型纸PET薄膜层形成步骤，使聚对苯二甲酸乙二醇酯材料的透明的薄膜粘附到离型纸粘合剂层的表面而形成离型纸PET薄膜层；硅树脂层形成步骤，在离型纸PET薄膜层的表面涂敷具有离型作用的硅树脂后，将其干燥而形成硅树脂层；粘合剂层形成步骤，在形成的离型纸的硅树脂层的表面局部涂敷丙烯酸系可去除粘合剂，形成其厚度为5～30μm的粘合剂层；及标签用薄膜合并步骤，在形成的粘合剂层上，粘贴预先准备的具有与所述离型纸彩色层形成对比的其他颜色的由合成树脂材料形成的薄膜形的标签用薄膜而结合，仅与相当于标签用薄膜整体面积的25～50％的一侧部分的背面结合而与离型纸合并。但是，粘附层200的面积从所述标签用薄膜300的一侧端形成而成为标签用薄膜整体面积的25％以下时，会出现标签用薄膜300容易脱离离型纸100的问题，因此将粘合剂层200的最小面积限定为标签用薄膜的整体面积的25％。另外，当粘合剂层的面积超过标签用薄膜的整体面积的50％时，标记用标签粘附到二次电池用电极的表面时，如果整体面积的背面也形成粘合剂层，会牵连没有缺陷的其他部位的电极受损。
其中，优选地，所述硅树脂层形成步骤之后，还包括：排气线形成步骤，在所述离型纸中不存在粘合剂层的部分，沿着长度方向局部切割而形成实线或波线形的排气线。
另外，优选地，所述标签用薄膜合并步骤之后，还包括：粘合剂引导线标记步骤，在所述标签用薄膜的表面，沿着所述粘合剂层存在于背面的部分的界线，以实线或波线的形态标记粘合剂引导线。
发明的效果
本发明的标记用标签的效果在于，采用涂敷了对比白色系的标签颜色光传感器能够准确识别的颜色的离型纸，并且对比黑色电极使用白色等亮色的标签时，能够为用户提供视觉上的便利及明确的识别力，并且标签自动供给装置也能明确地识别标签和离型纸，解决了因传感器的识别错误导致标签的自动供给不顺畅的问题。
并且，本发明的标记用标签效果在于，用户能够容易地识别到哪里为止是粘附层，在电极的缺陷部分粘附标签时，为用户提供便利性。
另外，本发明的标签的制造方法的效果在于，保留现有识别用标签的优点的同时，相比现有的识别用标签，提供具有更简便、更低廉的结构的标签，从而提高用户便利性，对制造成本及制造工艺赋予便利性。
附图说明
图1示出本发明的标记用标签的表面和背面。
图2示出本发明的标记用标签的A-A'部分的剖面。
图3示出本发明的标记用标签的整体制造工艺。
附图标记的说明
100：离型纸
110：基纸
120：离型纸彩色层
130：离型纸粘合剂层
140：离型纸PET薄膜层
150：硅树脂层
200：粘合剂层
300：标签用薄膜
400：粘合剂引导线
500：排气线。
具体实施方式
下面参照附图详细描述本发明的一个实施例。
图1示出本发明的标记用标签的表面和背面，图2示出本发明的标记用标签的A-A'部分的剖面。
图1中，左侧图示出本发明的标记用标签的表面，右侧图示出本发明的标记用标签的背面。
本发明的标记用标签的基本结构包括离型纸100、粘合剂层200及标签用薄膜300。图1和图2中的实线示出能够看见的，虚线示出背面存在的。
作为构成离型纸100的要素，基纸采用白色的60/m2规格的片面有光泽的扁艺术纸，能够使离型纸的厚度最小化且具有能够起到离型纸作用的最小限度的厚度。为了使与标签用薄膜的颜色对比最大化而在基纸的表面涂敷红色或黄色而形成的离型纸彩色层120和为了将其固定而使用透明材料的丙烯酸系永久粘合剂粘合到透明的材料的离型纸PET薄膜，依次层压离型纸PET薄膜层140及硅树脂层150而形成离型纸时，防止离型纸本身的厚度过厚。其中，为了使离型纸粘合剂层的厚度为10～15μm，优选地，离型纸PET薄膜层的厚度采用16～19μm，若离型纸的厚度较厚，标签用薄膜合并时，无法大量卷绕，使传感器能够明确识别离型纸和标签用薄膜的同时，需要调整其厚度不要太厚。硅树脂层150通过在离型纸PET薄膜层140的表面涂敷硅树脂而形成，可以起到离型纸的功能。
粘合剂层200通过在离型纸的硅树脂层的表面局部涂敷丙烯酸系粘合剂而形成，其厚度最好是5～30μm。本实施例中，采用丙烯酸系可去除粘合剂来形成粘合剂层200。图1中示出粘合剂层200粘贴到标签用薄膜300的整体面积中占据约25～30％的一侧部分的背面而结合的状态。其中，优选地，薄膜形的标签用薄膜的材料采用使其厚度能够达到25～36μm左右的PET薄膜，本实施例中，采用白色的PET薄膜作为标签用薄膜。
另外，为了赋予用户的便利性，标签用薄膜300的表面中，在背面存在粘合剂层的部分或其周围粘附标记用标签时，为了告知需要留多少余地进行粘贴或合适地粘贴，以实线或波线形态印刷而形成至少一个粘合剂引导线400。图1和图2示出粘合剂层的边界面上沿着界线以实线标记。其中，虽然附图中未具体示出，但为了用户的便利，可以标记两个以上的粘合剂引导线400。
另外，在所述离型纸100中不存在粘合剂层200的部分，还可以具有沿着离型纸的长度方向局部切割而以实线或波线形态形成的排气线500。通过这种排气线500，在与离型纸合并的状态下，标签用薄膜与离型纸之间的空间中存在的空气能够被顺利地排出到离型纸外部，可以事先防止卷绕本发明的标记用标签时无法均匀地卷绕或标签用薄膜翘起的现象以及卷绕状态下的厚度变得较厚的问题。
图3示出本发明的标记用标签的整体制造工艺。
基纸准备步骤(S100)是准备离型纸所使用的基纸的步骤。其中，基纸采用白色的，具有60g/m2的厚度且有光泽的扁艺术纸。
离型纸彩色层形成步骤(S200)是在准备的基纸的表面涂敷一定的颜色后，将其干燥而形成离型纸彩色层的步骤，主要采用红色或黄色作为离型纸彩色层的颜色。
离型纸粘合剂涂敷步骤(S300)是在形成的离型纸彩色层的表面涂敷透明的丙烯酸系永久粘合剂而形成离型纸粘合剂层的步骤，是防止离型纸彩色层玻璃或脱离且起到离型纸的功能而涂敷硅树脂时，为了较好地形成硅树脂层，较好地粘贴离型纸PET薄膜层的工艺。离型纸粘合剂涂敷步骤中使用的粘合剂采用透明的，与其粘合而合并的离型纸PET薄膜也采用透明的。
涂敷离型纸粘合剂之后，离型纸PET薄膜层形成步骤(S400)中，离型纸PET薄膜粘合到离型纸粘合剂层的表面。
之后，硅树脂层形成步骤(S500)中，在离型纸PET薄膜层的表面涂敷具有离型作用的硅树脂后，将其干燥而形成硅树脂层。
经过这种步骤，制造出作为本发明要素之一的具有一定颜色的离型纸。
另外，制造完离型纸之后，粘合剂层形成步骤(S600)中，在形成的离型纸的硅树脂层的表面局部涂敷丙烯酸系可去除粘合剂，形成其厚度为5～30μm的粘合剂层。
形成粘合剂层之后，根据需要，通过排气线形成步骤(S700)，在所述离型纸中不存在粘合剂层的部分，沿着离型纸的长度方向局部切割而形成实线或波线形态的排气线。
之后，标签用薄膜合并步骤(S800)中，在形成的粘合剂层上，粘贴预先准备的具有与所述离型纸彩色层形成对比的其他颜色的由合成树脂材料形成的薄膜形的标签用薄膜而结合，仅与相当于标签用薄膜整体面积的25～50％的一侧部分的背面结合而与离型纸合并，从而制造出本发明的二次电池用电极的缺陷部分标记用标签。
另外，在所述标签用薄膜合并步骤(S800)之后，为了赋予用户的便利性，还可以实施粘合剂引导线标记步骤(S900)，在所述标签用薄膜的表面，为了识别所述粘合剂层存在于背面的部分的界线，以实线或波线的形态标记粘合剂引导线。

Claims (10)

1.一种二次电池用电极的缺陷部分标记用标签，其特征在于，包括：
离型纸，通过依次层叠离型纸用基纸、在离型纸用基纸的表面涂敷一定的颜色而形成的离型纸彩色层、在离型纸彩色层的表面涂敷透明材料的粘合剂而形成的离型纸粘合剂层、在离型纸粘合剂层的表面粘贴透明的聚对苯二甲酸乙二醇酯薄膜而形成的离型纸PET薄膜层以及在离型纸PET薄膜层的表面涂敷硅树脂而形成的硅树脂层而形成；
粘合剂层，在离型纸的硅树脂层的表面局部涂敷丙烯酸系粘合剂而形成，其厚度为5～30μm；
薄膜形的标签用薄膜，相当于整体面积的25～50％的一侧部分的背面被粘附到粘合剂层而一体式结合，由具有与离型纸彩色层形成对比的其他颜色的合成树脂材料形成。
2.根据权利要求1所述的二次电池用电极的缺陷部分标记用标签，其特征在于，
所述标签用薄膜的材料是聚对苯二甲酸乙二醇酯。
3.根据权利要求1所述的二次电池用电极的缺陷部分标记用标签，其特征在于，
所述离型纸彩色层的颜色为红色或黄色，
所述标签用薄膜的颜色为白色。
4.根据权利要求1所述的二次电池用电极的缺陷部分标记用标签，其特征在于，
所述离型纸粘合剂层由丙烯酸系永久系列的粘合剂构成。
5.根据权利要求1所述的二次电池用电极的缺陷部分标记用标签，其特征在于，
所述离型纸粘合剂层的厚度为10～15μm，所述离型纸PET薄膜层的厚度为16～25μm，
所述标签用薄膜的厚度为25～50μm。
6.根据权利要求1所述的二次电池用电极的缺陷部分标记用标签，其特征在于，还包括：
为了识别所述标签用薄膜的表面上所述粘合剂层存在于背面的部分的界线，以实线或波线的形态标记的一个以上的粘合剂引导线。
7.根据权利要求1至6中任一项所述的二次电池用电极的缺陷部分标记用标签，其特征在于，
所述离型纸中不存在粘合剂层的部分还包括沿着离型纸的长度方向局部切割而以实线或波线形态形成的排气线。
8.一种二次电池用电极的缺陷部分标记用标签的制造方法，其特征在于，包括如下步骤：
基纸准备步骤，准备离型纸所使用的基纸；
离型纸彩色层形成步骤，在准备的基纸的表面涂敷一定的颜色后，将其干燥而形成离型纸彩色层；
离型纸粘合剂涂敷步骤，在形成的离型纸彩色层的表面涂敷透明的丙烯酸系永久粘合剂而形成离型纸粘合剂层；
离型纸PET薄膜层形成步骤，使聚对苯二甲酸乙二醇酯材料的透明的薄膜粘附到离型纸粘合剂层的表面而形成离型纸PET薄膜层；
硅树脂层形成步骤，在离型纸PET薄膜层的表面涂敷具有离型作用的硅树脂后，将其干燥而形成硅树脂层；
粘合剂层形成步骤，在形成的离型纸的硅树脂层的表面局部涂敷丙烯酸系可去除粘合剂，形成其厚度为5～30μm的粘合剂层；
标签用薄膜合并步骤，在形成的粘合剂层上，粘贴预先准备的具有与所述离型纸彩色层形成对比的其他颜色的由合成树脂材料形成的薄膜形的标签用薄膜而结合，仅与相当于标签用薄膜整体面积的25～50％的一侧部分的背面结合而与离型纸合并。
9.根据权利要求8所述的二次电池用电极的缺陷部分标记用标签的制造方法，其特征在于，
所述粘合剂层形成步骤之后，还包括：排气线形成步骤，在所述离型纸中不存在粘合剂层的部分，沿着离型纸的长度方向局部切割而形成实线或波线形态的排气线。
10.根据权利要求8或9所述的二次电池用电极的缺陷部分标记用标签的制造方法，其特征在于，
所述标签用薄膜合并步骤之后，还包括：粘合剂引导线标记步骤，在所述标签用薄膜的表面，以用于识别所述粘合剂层存在于背面的部分的界线的实线或波线的形态标记粘合剂引导线。
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