CN1301053A - 锂蓄电池及其制造方法 - Google Patents

锂蓄电池及其制造方法 Download PDF

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CN1301053A
CN1301053A CN00103329A CN00103329A CN1301053A CN 1301053 A CN1301053 A CN 1301053A CN 00103329 A CN00103329 A CN 00103329A CN 00103329 A CN00103329 A CN 00103329A CN 1301053 A CN1301053 A CN 1301053A
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洪智俊
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Kokam KK
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    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
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Abstract

一种锂蓄电池及其制造方法,其包括:一个隔离膜;多个具有所希望的尺寸、粘附在隔离膜的一个表面上并彼此均匀间隔开的阴极板;多个具有所希望的尺寸、粘附在隔离膜的另一个表面上并位于与阴极板相对应的间隔位置上的阳极板;粘附着阳极板和阴极板的隔离膜被重复地折叠,以使阳极板和阴极板以交替的方式排列。因此,该锂蓄电池在具有不同的形状、尺寸和所希望的容量并简化制造工艺的同时,还具有提高了的性能和特别的安全性。

Description

锂蓄电池及其制造方法
本发明涉及一种锂蓄电池，其具有将阳极板和阴极板以交替方式布置的结构，从而在简化制造工艺的同时，可以使锂蓄电池具有不同形状、尺寸和所希望的容量以及提高了的性能和稳定性。本发明还涉及一种制造该锂蓄电池的方法。
随着远程交换和移动电话工业的最新进展，需要一种更加紧凑、更轻和便携、高性能的锂蓄电池。
通常，锂蓄电池具有由阴极/隔离膜/阳极构成的三层结构，或者具有由阴极/隔离膜/阳极/隔离膜/阴极构成的五层结构。制造一个具有适当容量的锂蓄电池的传统方法包括有层压法和缠绕法。
图1a、图1b中示出了根据传统方法制造的锂蓄电池的结构。图1a为一个透视图，示出了一个具有由阴极2/隔离膜1/阳极3构成的单元电池结构的锂蓄电池。这样的蓄电池包括多个单元电池，每个单元电池具有热粘附在隔离膜1上的电极板2和3。根据所希望的锂蓄电池的容量，多个单元电池被层压，并以平行的方式彼此连接在一起。
然而，在图1a所示的锂蓄电池中，阴极板、隔离膜以及阳极板被彼此热粘附(层压)在一起。因此，当由于电池使用者的误操作或充电者控制不当，使锂蓄电池被连续地过度充电时，由于电压连续增加，从而很容易着火。此外，将阳极板和阴极板热粘附在隔离膜上的工艺，以及将单元电池彼此层压在一起的工艺均很复杂。这导致了电池制造中生产率的降低。
图1b为一个透视图，示出了一个根据传统的缠绕方法制造的锂蓄电池。这样的锂蓄电池是通过将一个单元电池缠绕在一个中央芯上的方式制成的，该单元电池具有阴极20/隔离膜10/阳极30的结构，并具有可满足电池所希望的容量的长度。
由于根据缠绕方法制造的锂蓄电池具有柱体形状，因此其相对较重且体积较大。而且，可以连接电极片40的位置局限于一个位于柱体的同心圆轴线上的电极和另一个位于缠绕末端的电极上。
因此，本发明的一个目的是为了解决上述问题，提供一种锂蓄电池，其在具有不同形状、尺寸和所希望的容量并简化制造工艺的同时，通过防止由大的电流和过度充电而引起的着火现象的发生，从而具有提高了的性能和特别的安全性。
本发明的另一个目的是提供一种制造该锂蓄电池的方法。
根据本发明的一个方面，提供了一种锂蓄电池，其包括：一个隔离膜；多个具有所希望尺寸的阴极板，它们粘附在隔离膜的一个表面上，并彼此均匀地间隔开；多个具有所希望尺寸的阳极板，它们粘附在隔离膜的另一个表面上，并位于与阴极板相对应的间隔位置上；粘附着阳极板和阴极板的隔离膜被重复地折叠，以使阳极板和阴极板以交替的方式排列。
根据本发明的另一方面，提供了一种制造锂蓄电池的方法，其包括以下步骤：在一隔离膜上施加一粘合剂；将多个具有所希望尺寸的阴极板粘附在隔离膜的一个表面上，这些阴极板按照这样的方式布置，以使得它们彼此均匀地间隔开；将多个具有所希望尺寸的阳极板粘附在隔离膜的另一个表面上，这些阳极板按照这样的方式布置，以使得它们彼此间隔开；重复地折叠粘附着阳极板和阴极板的隔离膜，以使得阳极板和阴极板以交替的方式排列。
参考附图，从下面实施例的描述中，本发明的上述和其它目的及方面将更加明显。
图1a为一个透视图，示出了根据传统的层压方法制造的锂蓄电池的结构；
图1b为一个透视图，示出了根据传统的缠绕方法制造的锂蓄电池的结构；
图2为一个横截面视图，示出了根据本发明的一个实施例的锂蓄电池的结构；
图3为一个横截面视图，示出了图2中锂蓄电池的折叠结构。
现在，参考图2和图3描述根据本发明的一个实施例的锂蓄电池。
如图2所示，一个折叠前的原始锂蓄电池由一阴极板300/隔离膜200/阳极板400的三层结构组成。阴极板300通过在一金属箔(例如铝箔)上施加一阴极活化剂、然后干燥所得到的箔的方式制成。这样的阴极板被切割成所希望的尺寸，并粘附在隔离膜200的一个表面上。阳极板400通过在一金属箔(例如铜箔)上施加一阳极活化剂、然后干燥所得到的箔的方式制成。这样的阳极板被切割成所希望的尺寸，并粘附在隔离膜200的另一个表面上。当施加了电极活化剂后，阴极板300和阳极板400经受一热熔合工艺处理，以将活化剂粘附在板上。用于使电极300和400绝缘的隔离膜200由利用聚乙烯(PE)或聚丙烯(PP)制成的聚合物多孔薄膜制造而成，并具有一单层结构或多层结构。
在隔离膜200的表面上，通过一离子传导粘合剂500来粘附电极300和400，该离子传导粘合剂500不干涉锂离子的传导。
一个具有这样的由阴极板300/隔离膜200/阳极板400构成的三层结构的电池板100被重复地折叠，以使得阳极板400和阴极板300以交替的方式排列，如图3所示。
现在参考图2和图3详细描述根据本发明的一个实施例的锂蓄电池的制造方法。
如图2所示，多个具有所希望尺寸的阴极板300被粘附在用于绝缘各电极的隔离膜200的一个表面上，并被均匀地间隔开。在隔离膜200的另一个表面上，粘附着多个具有所希望尺寸的阳极板400，这些阳极板400位于与阴极板300相对应的位置上。以这种方式，一个具有由阴极板300/隔离膜200/阳极板400构成的三层结构的电池板100的原始电池被制造出来。
在现有技术中，电极板2和3被热粘附(层压)到隔离膜1上，以制造出单元电池，以及多个单元电池被层压在一起，以制造出电池。与此相对照，在本发明中，电极板300和400不是被热粘附(层压)到隔离膜200上。根据本发明，当阴极板300和阳极板400被粘附在隔离膜200上后，根据应用和所产生的电池的尺寸，制造出的电池板100被重复地折叠，以使得阳极板400和阴极板300以交替的方式排列，如图3所示。然后，用电极片600连接所产生的电池，从而生产出所希望的锂蓄电池。
从上述的描述中可明显看出，本发明提供了一种锂蓄电池及该锂蓄电池的制造方法，其中，具有所希望尺寸的阴极板300和阳极板400被粘附在隔离膜200上，以形成电池板100，该电池板100随后被重复地折叠，以使阳极板400和阴极板300以交替的方式排列。因此，本发明可以制造出这样的锂蓄电池，其通过防止由大的电流和过度充电而引起的着火现象的发生，从而具有提高了的性能和特别的安全性，同时，其可以具有不同的形状、尺寸和所希望的容量，并能够简化制造工艺。
尽管为解释的目的已经公开了本发明的优选实施例，但是对本技术领域的普通技术人员来说，能够理解，还可以做出各种不同修改、添加或替换，这些都不脱离本发明后附权利要求的范围和精神。

Claims (3)

1．一种锂蓄电池，其特征在于，它包括：
一个隔离膜；
多个具有所希望尺寸的阴极板，它们粘附在隔离膜的一个表面上，并彼此均匀地间隔开；
多个具有所希望尺寸的阳极板，它们粘附在隔离膜的另一个表面上，并位于与阴极板相对应的间隔位置上；以及
粘附着阳极板和阴极板的隔离膜被重复地折叠，从而使阳极板和阴极板以交替的方式排列。
2．根据权利要求1的锂蓄电池，其特征在于，隔离膜通过由聚乙烯或聚丙烯制成的单层或多层薄膜形成。
3．一种制造锂蓄电池的方法，其特征在于，包括以下步骤：
在一隔离膜上施加一粘合剂；
将多个具有所希望尺寸的阴极板粘附在隔离膜的一个表面上，这些阴极板按照这样的方式布置，以使它们彼此均匀地间隔开；
将多个具有所希望尺寸的阳极板粘附在隔离膜的另一个表面上，这些阳极板按照这样的方式布置，以使它们彼此间隔开；以及
重复地折叠粘附着阳极板和阴极板的隔离膜，以使阳极板和阴极板以交替的方式排列。
CNB001033298A 1999-12-20 2000-03-06 锂蓄电池及其制造方法 Expired - Lifetime CN1192450C (zh)

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