CN1169037A - 用于胶卷式电极的隔板 - Google Patents

用于胶卷式电极的隔板 Download PDF

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CN1169037A
CN1169037A CN97105584A CN97105584A CN1169037A CN 1169037 A CN1169037 A CN 1169037A CN 97105584 A CN97105584 A CN 97105584A CN 97105584 A CN97105584 A CN 97105584A CN 1169037 A CN1169037 A CN 1169037A
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CN1104747C (zh
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丁镇东
李宗郁
姜秉炫
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Samsung SDI Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403—Manufacturing processes of separators, membranes or diaphragms
    • H01M50/406—Moulding; Embossing; Cutting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/409—Separators, membranes or diaphragms characterised by the material
    • H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/463—Separators, membranes or diaphragms characterised by their shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/49112—Electric battery cell making including laminating of indefinite length material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49108—Electric battery cell making
    • Y10T29/49115—Electric battery cell making including coating or impregnating

Abstract

使用切割装置或激光束切去防止阴极和阳极间短路的隔板在圆柱形电池的中心的不必要部分，从而增加电池内部空间和电解液，并使电池具有更高容量，并在产生气体的同时具有低的壳内压。

Description

用于胶卷式电极的隔板
本发明涉及一组卷绕电极。尤其是涉及一种除去圆柱形镍氢电池中心部位的不必要隔板的一组卷绕电极，从而增加电池的内部空间和电解溶液，并且具有更高容量以及在产生气体时有低的外壳压力。
象圆柱形电池和电容器这样的一组卷绕电极具有隔板以防阴极和阳极短路。本发明涉及具有阴极、阳极和隔板的一组卷绕电极技术。圆柱形电池，特别是圆柱形镍氢电池作为例子来描述。
例如照像机、摄录一体机、便携式CDP、收音机、盒式磁带机、笔记本式计算机、寻呼机和蜂窝式电话等这样的愈来愈多的便携式电子装置需要更高容量和更长寿命的电池。
一般地，电池是通过接触电位差把化学能转化成电能的装置，它有许多种类。电化学电池和电池组从技术上分成不能充电的原电池或可充电的二次电池或把燃料热量转化成电能的燃料电池或把光能转化成电能的太阳能电池。电化学电池和电池组也按电解质组成、电池和电池组的形状分类。电解质的组分和形状分别是碱性、固体或非水溶液电池和圆柱形、钮扣或硬币形。
在这些种类电池中，圆柱形电池(胶卷式)放出电流并由阴极、阳极、防止阴极和阳极短路的隔板、电解质、正极端子和负极端子组成。为详细描述，镍氢电池的结构示意表示在图5中。圆柱形镍氢电池由涂敷正极活性材料Ni(OH)2的阴极(13)、涂敷主要由LaNi5、MmNi5、Ti-Fe或Ti-Ni合金构成的负极活性材料的氢化合金阳极(15)、由无纺纤维和玻璃纸带制成以防阴极(13)和阳极(15)短路的隔板(17)、作为正极端子的盖帽(19)、和作为负极端子和封装设备的外壳(12)组成，另外还有垫圈(21)、安全阀(23)、盖板(25)、绝缘套管(27)和绝缘板(29)。
制造圆柱形镍氢电池的方法如下。首先，通过在金属支承件上涂敷正极活性材料的浆料、干燥和辊压来制造阴极，然后，通过在金属支承件上涂敷负极活材料的浆料、干燥和辊压来制造阳极。此后，隔板置于阴极和阳极之间并卷绕。把此电极和隔板的卷绕组件插入外壳中。此后，将电解质注入外壳内并把盖帽组件固定在上部的开口中。
关于按照上述方法制造的圆柱形镍氢电池的充放电反应的详细说明如下。
氢化合金用作负极活性材料、氢氧化镍用作正极活性材料，以及氢氧化钾(KOH)水溶液用作电解质。氢化合金在充电过程期间存储通过电解质中水离解所产生的氢离子，并在放电过程期间释放氢离子到电解质中。充电和放电反应如下。阴极： 阳极： 总反应：
在上述反应中，M是能吸收和放出氢离子的氢化合金，它分成由稀土元素制成的AB5系(group)或者由Ti、Zr、V等制成的AB2系(group)。按照上述反应，电池能充放电大于数百次。
制造圆柱形镍氢电池的方法包括把阴极(13)和阳极(15)放置在隔板(17)的相对二侧并使用图1所示的心轴卷绕隔板(17)。图2是插入极板和隔板的圆柱形电池的横截面图。如图3所示，当卷绕阴极(13)和阳极(15)时，隔板没有叠放在极板上的部分在电池的中心重叠。这部分没有起到防止阴极(13)和阳极(15)短路的隔板(17)的作用，而成不必要。隔板(17)占有其中有电解溶液的空间，从而使电池中电解溶液量降低，以致于使电池具有更低容量和更短寿命。
因而，本发明试图克服现有技术的上述缺陷，提供使内部空间变大从而具有更高电池容量和更低内压的圆柱形电池。
本发明的一个实施例是一组卷绕电极，该卷绕电极包括阴极、阳极、连接到所述阴极的正极端子、连接到所述阳极的负极端子、在所述阴极和所述阳极之间的隔板、以及电解溶液，其中卷绕所述阳极、所述阳极和所述隔板，改进部分包括从其重叠部分的中心切去所述隔板。
隔板最好是从其中心切去1-14mm。
本发明的另一实施例是一组卷绕电极的方法，包括步骤：通过在一金属支承件上涂覆正极活性材料的浆料、干燥和辊压来制造阴极，通过在一金属支承件上涂覆负极活性材料的浆料、干燥和辊压来制造阳极，把隔板置于所述阴极和所述阳极之间并卷绕所述隔板，把电极和所述隔板的卷绕组件插入外壳中，注入电解质，并且固定盖帽组件在其上部的开口内，其中所述隔板从中心切去重叠部分。
隔板最好从中心切去1-14mm。
最好通过使用切割装置或激光束来完成所述隔板的切割。
将参照附图说明本发明，其中：
图1A和图1B分别是卷绕机的平面图和正视图，卷绕机包含围绕卷轴的极板和隔板；
图2是卷绕后极板和隔板插入其中的胶卷式电池的横截面图；
图3是表示在卷绕圆柱形电池中将切去的不必要的隔板部分的横截面图；
图4是在切去圈绕圆柱形电池中不必要的隔板部分后的横截面图；
图5是整个圆柱形电池的简图。
虽然结合优选实施例描述本发明，但应该理解本发明不局限于在此描述的优选实施例。
实例：
以现有方法制造以卷绕状态插入外壳的阴极和阳极。
也就是说，通过在金属支承件上涂覆82.8份重量的正极活性材料的浆料、干燥和辊压来制造阴极，其中82.8份重量的正极活性材料是混合44.8份重量氢氧化镍(NiOH2)、8.5份重量氧化钴、0.5份重量增粘材料、2份重量粘合剂、27份重量水而成。通过在金属支承件上涂覆负极活性材料浆料、干燥和辊压来制造阳极，其中负极活性材料是混合83.7份重量氢化合金粉末、0.33份重量导电碳材料、0.17份重量增粘材料、0.67份重量粘合剂和13.6份重量水而成。
把阴极和阳极切割成规定大小。然后，尼龙类无纺纤维隔板放置在阴极和阳极之间以制造卷绕组件，卷绕此组件并插入外壳中。
如图3所示，从中心切去14mm的隔板重叠部分。
将电解溶液注入外壳内并固定盖帽组件在外壳上部的开口中来制造一组卷绕电极。
图4表示按照本发明切去隔板中心部分后的横截面图。
对比实例：
除切去卷绕隔板的不必要部分之外，按照上述例子制造圆柱形镍氢电池。
在0.1C/150％充电和0.2C/0.9V截止的条件下初始激活镍氢电池3个循环。然后在1C/150％充电和1C/0.9V截止的条件下重复放电和充电200次。
下表表示按照上述实例和对比实例测量内部空间增加比率、容量和寿命所得的结果。
                        [表]
内部空间增加比率(％) 容量增量(200次循环后)     寿命
  实例          20     20mAh 大于400次循环
 对比实例           0     没有 大于300次循环
如上表所示，在电池壳中保证在隔板体积的基础上附加空间约3.8-6.0％。在插入由极和隔板后，增加最大20％的内部空间。因此，能对电池注入足够的电解溶液并且降低的内压使电池更耐用。
根据本发明的制造镍氢电池的方法，通过从电池的卷绕组件中切去不必要的隔板部分来增加电池的内部的空间。因此，电解液量增加、外壳中的内压降低，从而制造高容量和长寿命的电池。

Claims (5)

1.一组卷绕电极，包括：
阴极；
阳极；
连接到所述阴极的正极端子；
连接到所述阳极的负极端子；
在所述阴极和所述阳极之间的隔板；和
电解溶液，其中所述阴极、所述阳极和所述隔板被卷绕，其特征在于：
从所述隔板中心切去其重叠部分。
2.如权利要求1所述的卷绕电极组，其中所述隔板从中心被切去1-14mm。
3.一组制造卷绕电极的方法，包括步骤：
通过在金属支承件上涂覆正极活性材料的浆料、干燥和辊压来制造阴极；
通过在金属支承件上涂覆负极活性材料的浆料、干燥和辊压来制造阳极；
放置隔板在所述阴极和所述阳极之间并卷绕所述隔板；以及
把电极和所述隔板的卷绕组件插入外壳中，倒入电解溶液并固定盖帽组件在外壳上部的开口中，其中从所述隔板中心切去其重叠部分。
4.如权利要求3所述的制造一组卷绕电极的方法，其中从所述隔板中心切去1-14mm。
5.如权利要求3所述的制造一组卷绕电极的方法，其中通过使用切割装置或激光束来完成所述隔板的切割。
CN97105584A 1996-06-19 1997-06-19 用于胶卷式电极的隔板 Expired - Fee Related CN1104747C (zh)

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CN101483259B (zh) * 2008-12-05 2012-01-18 东莞新能源科技有限公司 锂离子电池的裸电芯扩孔方法及使用此方法的卷绕机

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CN1104747C (zh) 2003-04-02
KR100210502B1 (ko) 1999-07-15

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