CN115989613A - 用于二次电池的软包袋和包括该软包袋的软包型二次电池 - Google Patents
用于二次电池的软包袋和包括该软包袋的软包型二次电池 Download PDFInfo
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Abstract
本发明涉及一种能够打开和关闭的软包袋及包括该软包袋的软包型二次电池,由于其不产生在脱气工序之后要丢弃的软包袋而具有经济效果。
Description
技术领域
本申请要求基于2021年8月13日提交的韩国专利申请号10-2021-0107274的优先权,其全部内容通过引用并入本文。
本发明涉及一种用于二次电池的软包袋和包括该软包袋的软包型二次电池。
背景技术
二次电池广泛用作诸如手机、笔记本电脑和摄像机的移动设备的电源。特别地,由于工作电压高和单位重量能量密度高的优点,锂二次电池的使用迅速增加。
这些锂二次电池主要使用锂类氧化物作为正极活性材料并使用碳材料作为负极活性材料,通常根据所使用的电解质的类型分为锂离子电池、锂离子聚合物电池和锂聚合物电池,并且根据电池的形状也分为圆柱型、方型和软包型二次电池。通常,就电池形状而言,对可应用于诸如移动电话的产品的厚度薄的方型二次电池和软包型二次电池的需求很高。
在这些锂二次电池中,对软包型二次电池非常关注。软包型二次电池对形状和尺寸没有限制,并且容易通过热密封进行组装,并且特别适合于生产重量轻且厚度薄的电池,因为当发生异常行为时其容易释放气体或液体。通常,软包型二次电池具有电极组件嵌入由铝层压片材制成的软包袋中的结构。也就是说,通过在铝层压片材上形成用于安装电极组件的容纳部,并且在电极组件安装在容纳部上的状态下热密封与铝层压片材分离的单独的铝层压片材或延伸的铝层压片材,来制造软包型二次电池。
在制造软包型二次电池的方法中,将电极组件安装在容纳部上,然后注入电解质溶液,并密封软包袋。然后,执行额外的脱气工序以去除电解质溶液中包含的气体。此后,执行切割不必要的铝层压片材的工序以制造软包型二次电池。铝层压片材的尺寸应该制造得较大,以为气体的产生做准备,并且在脱气工序之后大量的铝层压片材被丢弃。
因此,考虑到经济可行性等,需要一种能够在脱气工序之后不丢弃片材的情况下制造的软包袋。
现有技术文献
专利文献
韩国专利公开第10-2013-01334242号
发明内容
技术问题
本发明的一个目的是提供一种能够打开和关闭的软包袋,其中,在软包型二次电池的制造过程中在去除气体的脱气工序中,能够打开软包袋以去除气体,然后,能够关闭软包袋。
技术方案
为了实现上述目的,本发明提供一种用于二次电池的软包袋,所述软包袋包括电极组件容纳部和密封部,并且具有能够重复打开和关闭密封部的开闭部。
在本发明的一个实施例中,软包袋可以包括软包膜,所述软包膜包括金属层和形成在金属层的一个表面上的内树脂层,并且开闭部可以包括设置在密封在一起的两个软包膜中的一个内树脂层上的突起部和设置在另一个内树脂层上的突起固定部。
在本发明的一个实施例中,密封部可以以环的形式位于电极组件容纳部的周围,并且开闭部可以基于当电极组件被容纳时电极端子所在的轴形成在左侧或右侧的密封部中。
在本发明的一个实施例中,突起部可以具有从内树脂层的表面突出的突起,并且突起固定部可以具有从内树脂层的表面凹陷的凹槽。
在本发明的一个实施例中,突起可以在内树脂层的表面上沿直线形成为多个,并且凹槽可以在内树脂层的表面上沿直线形成为多个。
在本发明的一个实施例中,突起可以以圆柱形或多边形柱的形式突出,并且凹槽可以以圆柱形或多边形柱的形式凹陷。
突起可以在内树脂层的表面上沿直线形成为连续线,并且凹槽可以在内树脂层的表面上沿直线形成为连续线。
在本发明的一个实施例中,开闭部能够通过使突起部和突起固定部的嵌合和脱离来打开和关闭。
此外,本发明提供一种软包型二次电池,该软包型二次电池包括:本发明的软包袋;容纳在软包袋中的电极组件;以及注入软包袋中的电解质溶液。
有益效果
本发明的软包袋可以打开和关闭,从而当制造软包型二次电池时,软包袋可以被打开以去除气体,然后软包袋可以被关闭。因此,本发明的软包袋具有非常优异的经济效率的优点,因为在气体去除工序之后没有要丢弃的软包袋。
附图说明
图1是示意性地示出在常规的软包型二次电池的制造过程中去除多余部分之前软包型二次电池的形状的图。
图2至图6是示意性地示出在常规的软包型二次电池的制造过程中的脱气工序的视图。
图7是示出本发明的软包袋的打开状态的透视图。
图8是示出本发明的软包袋的关闭状态的透视图。
图9是示出作为本发明的一个实施例的软包袋的开闭部的打开状态的视图。
图10是示出作为本发明的一个实施例的软包袋的开闭部的打开状态的横截面图。
图11是示出作为本发明的一个实施例的软包袋的开闭部的关闭状态的横截面图。
具体实施方式
在下文中,将基于附图详细描述本发明,使得本领域普通技术人员能够容易地实施本发明。然而,本发明可以以各种不同的形式实施,并且不限于这里描述的实施例。
为了清楚地解释本发明,省略了与描述无关的部分,并且在整个说明书中,相同的附图标记被分配给相同或相似的部件。
本说明书和权利要求书中使用的术语和词语不应被解释为限于普通术语或字典术语,并且应该基于发明人可以适当地定义术语的概念以尽可能最好的方式描述其发明的原理,以与本发明的技术思想一致的意义和概念来解释。
在下文中,将参考附图详细描述实施例。然而,本发明可以以各种不同的形式实施,并且不限于本文所描述的实施例。
图1是示意性地示出在常规的软包型二次电池的制造过程中去除多余部分之前的软包型电池的形状的视图,并且是电极组件被容纳在电极组件容纳部110中的状态。
图2至图6是示意性地示出在使用常规的袋的袋型二次电池的制造过程期间的脱气处理的视图。
常规的软包型二次电池制造过程中的脱气工序将描述如下。
首先,如图2所示,电极组件11被安装在软包袋100的电极组件容纳部110上,并且密封部120被热熔接和密封,密封部120是围绕电极组件11的外周面的除多余部分14之外的部分。由于多余部分14未被密封,因此电解液通过多余部分14被注入。
接下来,如图3所示,通过将多余部分14的一侧的边缘的端部15热熔接并执行充电和放电以激活软包型二次电池10来进行化成工序。化成工序是为了通过在电极(特别地,负极)的表面上通过电解质溶液形成保护膜来抑制完成的二次电池中的电解质溶液的分解反应而执行的。在化成工序中在电池的内部产生气体,所产生的气体和过量的电解质溶液被收集并捕获在多余部分14中。
此后,如图4所示,在多余部分14中形成通孔17,以执行用于通过通孔17排出气体的脱气工序。在脱气工序之后,如图5所示,密封基于切割部16在切割部16与电极组件11之间的外周面,并且通过沿着切割部16切割来去除多余部分14。
常规的软包袋100需要捕获气体的多余部分14,并且在去除捕获在多余部分14中的气体的脱气工序之后,通过沿着切割部16切割来去除多余部分14。因此,存在产生要丢弃的软包袋而不经济的问题。
因此,本发明提供一种能够在没有要丢弃的软包袋的情况下制造软包型二次电池的软包袋。
以下,将参照图7至图11描述根据实施例的用于二次电池的软包袋。
图7示出了根据本发明实施例的用于二次电池的软包袋100的打开状态,图8示出了根据本发明实施例的用于二次电池的软包袋100的关闭状态。图8示出了电极组件10被容纳在电极组件容纳部110中的状态。
参照图7和图8,根据本发明实施例的用于二次电池的软包袋100包括电极组件容纳部110和密封部120,并且密封部120设置有能够重复打开和关闭的开闭部130。
密封部120以环的形式位于电极组件容纳部110的周围,并且开闭部130可以基于当电极组件被容纳时电极端子所在的轴形成在左侧或右侧的密封部上。具体地,密封部120可以以四边形环的形式位于电极组件容纳部110的周围。
用于二次电池的软包袋100可以包括软包膜200,软包膜200具有金属层210和形成在金属层210的一个表面上的内树脂层220。
在本发明的一个实施例中,如图9至图11所示,开闭部130可以包括设置在密封在一起的两个软包膜200中的任意一个的内树脂层220上的突起部221,以及设置在另一个内树脂层上的突起固定部222。
突起部221可以具有从内树脂层220的表面突出的突起,并且突起固定部222可以具有从内树脂层220表面凹陷的凹槽。
如图9所示,突起可以在内树脂层220的表面上沿直线形成为多个。此外,突起与另一相邻突起可以具有间隔距离。凹陷的凹槽可以在内树脂层220的表面上沿直线形成为多个。在这种情况下,突起和凹槽可以以相同的数量和彼此间隔开的距离形成。
此外,突起以圆柱形或多边形柱的形式从内树脂层220的表面突出,并且凹槽以圆柱形或多边形柱的形式从内树脂层220表面凹陷。在这种情况下,突起的形状和凹槽的形状可以彼此对应。
此外,如图10所示,突起可以在内树脂层220的表面上沿直线形成为连续线,凹槽可以在内树脂层220的表面上沿直线形成为连续线。突起和凹槽在纵向方向上的横截面可以具有圆形、多边形等。
根据本发明的一个实施例,本发明的用于二次电池的软包袋100的打开和关闭可以通过突起部221和突起固定部222的嵌合和脱离来执行。
图9和图10是示出用于二次电池的软包袋100的开闭部130的打开状态的图。也就是说,图9和图10示出了突起部221和突起固定部222的脱离状态,该脱离状态是突起部221的突起未嵌合到突起固定部222的凹陷的凹槽中的状态。
图11示出了用于二次电池的软包袋100的开闭部130的关闭状态。也就是说,图11示出了突起部221和突起固定部222嵌合的状态。更具体地,由于突起部221的突起嵌合到突起固定部222的凹陷的凹槽中,因此可以关闭软包袋100的开闭部130。
根据本发明的一个实施例,由于本发明的软包袋100可以通过突起部221和突起固定部222的嵌合和脱离来打开和关闭,所以当制造软包型二次电池时,不需要捕获气体的多余部分。因此,本发明不需要通过将切割部切割来去除多余部分的步骤,并且本发明可以具有经济效果,因为不产生要去除的多余部分,因此即使没有要丢弃的软包袋也能够制造软包型二次电池。
具体地,在突起部221和突起固定部222脱离的状态下,即,在软包袋100打开的状态下可以执行脱气工序以排出气体。在脱气工序之后,突起部221和突起固定部222嵌合,即,软包袋100处于关闭状态,以最终制造软包型二次电池。
因此,根据本发明实施例的软包袋100能够根据突起部221和突起固定部222的嵌合和脱离而打开和关闭,并因此不需要包括在气体收集之后丢弃的另外的多余部分,并且由于不产生要丢弃的软包袋,所以非常经济。
此外,根据本发明的一个实施例的软包型二次电池可以包括:根据上述的本发明一个实施例的软包袋;容纳在软包袋中的电极组件;以及注入软包袋中的电解质溶液。
电极组件和电解质溶液可以是本领域已知的电极组件和电解质溶液。
与本实施例相关的本领域普通技术人员将理解,在不偏离以上的描述的本质特征的情况下本发明可以以修改的形式实现。因此,所公开的方法应在说明性意义上而非限制性意义上考虑。本发明的范围由权利要求书而不是前面的描述表示,并且在与其等效的范围内的所有差异应被解释为包括在本发明中。
[附图标记说明]
10:软包型二次电池
11:电极组件
12,13:电极端子
14:多余部分
15:多余部分的边缘的端部
16:切割部
17:通孔
100:软包袋
110:电极组件容纳部
120:密封部
130:开闭部
200:软包膜
210:金属层
220:内树脂层
221:突起部
222:突起固定部
Claims (9)
1.一种用于二次电池的软包袋,所述软包袋包括电极组件容纳部和密封部,并且具有能够重复打开和关闭所述密封部的开闭部。
2.根据权利要求1所述的用于二次电池的软包袋,其中,所述软包袋包括软包膜,所述软包膜包括金属层和形成在所述金属层的一个表面上的内树脂层,并且所述开闭部包括设置在密封在一起的两个软包膜中的一个软包膜的内树脂层上的突起部以及设置在另一个内树脂层上的突起固定部。
3.根据权利要求1所述的用于二次电池的软包袋,其中,所述密封部以环的形式位于所述电极组件容纳部的周围,并且所述开闭部基于当电极组件被容纳时电极端子所在的轴形成在左侧或右侧的所述密封部上。
4.根据权利要求2所述的用于二次电池的软包袋,其中,所述突起部具有从所述内树脂层的表面突出的突起,并且所述突起固定部具有从所述内树脂层的表面凹陷的凹槽。
5.根据权利要求4所述的用于二次电池的软包袋,其中,所述突起在所述内树脂层的所述表面上沿直线形成为多个,并且所述凹槽在所述内树脂层的所述表面上沿直线形成为多个。
6.根据权利要求4所述的用于二次电池的软包袋,其中,所述突起以圆柱形或多边形柱的形式突出,并且所述凹槽以圆柱形或多边形柱的形式凹陷。
7.根据权利要求4所述的用于二次电池的软包袋,其中,所述突起在所述内树脂层的所述表面上沿直线形成为连续线,并且所述凹槽在所述内树脂层的所述表面上沿直线形成为连续线。
8.根据权利要求2所述的用于二次电池的软包袋,其中,所述开闭部能够通过使所述突起部和所述突起固定部的嵌合和脱离来打开和关闭。
9.一种软包型二次电池,包括:
权利要求1至8中的任一项所述的软包袋;
容纳在所述软包袋中的电极组件;以及
注入所述软包袋中的电解质溶液。
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