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CN1111914C - 矩形电池顶盖组件 - Google Patents

矩形电池顶盖组件 Download PDF

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Publication number
CN1111914C
CN1111914C CN98105937A CN98105937A CN1111914C CN 1111914 C CN1111914 C CN 1111914C CN 98105937 A CN98105937 A CN 98105937A CN 98105937 A CN98105937 A CN 98105937A CN 1111914 C CN1111914 C CN 1111914C
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cap assembly
electrode film
cover plate
extra exit
outlet opening
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CN1213188A (zh
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金昌燮
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Samsung SDI Co Ltd
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Samsung Electron Devices 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/154—Lid or cover comprising an axial bore for receiving a central current collector
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Gas Exhaust Devices For Batteries (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

矩形电池顶盖组件包括有一出口孔的盖板，一具有引向排气孔的通孔并与盖板上部结合的正电极端，盖板有一其间插入的绝缘板，一与电极组件的正电极相连的正电极片，一个具有中空铆柱的导电安全出口支撑，该铆柱穿过盖板的出口孔，并将正电极端的通孔与该正电极端相连，和一锥形导电安全出口，其上部四围与安全出口支撑的底面相结合以封密铆柱的中空，而其顶点则与正电极片的上面相接触，当电池的内压增到预定值时安全出口的顶点与正电极片分离使安全出口破裂。

Description

矩形电池顶盖组件
技术领域
本发明涉及一种矩形电池的顶盖组件，更具体的说，涉及一种当安全出口由于电池内压增加而破裂时可同时切断电源的矩形电池的顶盖组件。
背景技术
矩形电池已经广泛地用作为二次电池，它包括一个矩形壳体内的电极装置。图1示出了一个矩形电池的例子。如图1所示，一个称之为胶柱(jelly-roll)的圆柱形的或矩形电极装置(未示出)装于矩形壳体内，矩形壳体有一个上开口面。胶柱有弯阳极和阴极板(未示出)组成，中间插入有一个隔离器(未示出)作为一个绝缘器。顶盖组件10装于壳体1的上部。
顶盖组件10包括一个正电极部分11，一个负电极部分12和一个用来将它们相电气隔离的绝缘板13。
当矩形电池不正常反应时，壳体1内压由于产生气体而增加，因此壳体可能爆破。为了防止这类爆破，和减少壳体的内压，在负电极部分12形成有一个用来排出在异常反应时产生的气体的易破部分14。也就是说，当电池内压增加时，易破部分14的脆弱的边缘部分被破坏而形成一个排气的安全出口。
在传统的顶盖组件中，电池内压可通过破裂易破部分14来减压，但是电流并不停止流动。因此，在易破部分破裂之后可能发生短路或电泄漏。
发明内容
为了解决上述问题，本发明的目的是为了提供一种改进的矩形电池的顶盖组件，它可在排气减压电池的内压的同时来切断电流。
为达到上述目的，本发明提供了这样一种矩形电池的顶盖组件，它包括一个形成有一个出口孔的盖板；一个连接到电极组件的正电极的正电极片，一个具有中空铆柱的导电安全出口支撑部分，铆柱穿过上述盖板的出口孔；和一个导电安全出口，其上部四围部分与上述安全出口支撑相组合而将所述铆柱的中空封密，而其顶点固定在所述正电极片的上表面，其中当所述电池内压增加到一个预定值时所述安全出口的顶点与所述正电极片相分离而使所述安全出口破裂。
附图说明
读者在参阅附图阅读了对最佳实施例的详细描述之后将会对本发明的上述目的和优点有更明白的理解。
图1是一个显示具有一个传统顶盖组件的矩形电池的示意截面图；
图2是一个具有一个本发明的顶盖组件的矩形电池的分解透视图；
图3是一个本发明的顶盖组件的截面图；
图4是从图3“A”的透视所见的图3的顶盖组件。
实施方式
参阅图2，一个具有按照本发明的顶盖组件的矩形电池包括一个由弯阳极和阴极板形成在矩形壳体21中的电极组件22，阳极和阴极板覆盖了活性材料，在两板之间插入了一个由多孔聚合物薄膜制成的封密隔离器；和一个组合在壳体21上部的顶盖组件30。一个绝缘板23插在电极组件22与顶盖30之间。顶盖组件30被与正电极片22a和负电极板22b电气地相连，电极片22a穿过绝缘板23并与电极组件22的正电极相连。
参阅详细显示顶盖组件30结构的图3和4，顶盖组件30包括一个形成有一个出口孔31a的盖板31；一个形成在盖板31之上的正电极端32；和一个锥形导电安全出口33，出口33的上部四围部分与安全出口支撑35的底面相接合，以将排气孔31a封密。安全出口33的顶点33a结合得与正电极片22a上表面相接触。此时，顶点33a和正电极片22a之间的焊接部分(W1)最好是用激光焊接的。如将稍后要介绍的，当电池的内压增加时，顶点33a会与正电极片22a分开，从而阻止电流流动。
顶盖组件30还可包括一个用来支撑正电极片22a防止其当顶点33a与其分离时被拉动和损坏的片固定部分36；和一个用来支撑片固定部分36的支撑37。用激光焊接法将片固定部分36与在正电极片22a的上表面的焊接部分(W2)相结合。一个形成在片固定部分36上的钩部分36a悬挂在形成在支撑37上的结合部分37a。
片固定部分36和支撑37分别有通向盖板31的出口孔31a的通孔36b和37b。一个绝缘板34插入于盖板31和正电极端之间。
另外，提供一个导电安全出口支撑35来更安全地与安全出口33相结合。安全出口支撑35有一个铆柱35a，在铆柱35a中形成有一个中空并与盖板31的出口孔31a相连。铆柱35a插入到支撑37的通孔37b，盖板31的出口孔31a，绝缘板34的通孔34a和正电极端32的通孔32a之后，用打压或其他工具将其打压平整。在采用安全出口支撑37的情况下，安全出口33的上部四围部分33b与安全出口支撑35的底面相结合以将铆柱35a的中空封密。用激光将安全出口33的上部和安全出口支撑35之间的焊接部分(W3)进行焊接。
在矩形电池工作中，如图3所示，电流通过正电极片22a，安全出口33和安全出口支撑35流向正电极端32。当电池被充电或放电时，电池内部的温度由于诸如过流，过充电等状况而升高。于是，从包括电解质这样的化学材料中产生出气体，从而增加了电池的内压。此时，安全出口33受到电池内产生的气体的压力。
当电池的内压增加到或高于预定值时，在安全出口33的顶点33a和正电极片22a之间的焊接部分被破坏，这样，安全出口33与正电极片22a相分离。因此，电流停止流动。此时，正电极片22a可被安全地保持不变，因为它被片固定部分36支撑住了。
当电池的内压愈来愈大时，薄板制成的安全出口33破裂，使得电池中的气体通过出口孔31a排出到电池之外。于是，电池的内压被减少了。根据本发明的矩形电池的顶盖组件30，当电池的内压过分增加时，锥形安全出口33被破裂，因此排出气体并中断电流。这样一来，电池的安全得到保证，从而可防止出现过电流或泄漏。

Claims (5)

1.一种矩形电池的顶盖组件，包括：
一个形成有一个出口孔的盖板；
一个连接到电极组件的正电极的正电极片；
一个导电安全出口支撑，它具有一个穿过所述盖板的所述出口孔的中空铆柱；
一个导电安全出口，其上部四围部分与所述安全出口支撑的底面相结合以将所述铆柱的中空封密，而其顶点固定在所述正电极片的上表面；
其中当所述电池的内压增加到一个预定值时，所述安全出口的顶点与所述正电极片相分离而使所述安全出口破裂。
2.如权利要求1所述的矩形电池的顶盖组件，其中所述的顶点通过激光焊接与所述正电极片的上部面固定。
3.如权利要求1所述的矩形电池的顶盖组件，还包括：
一个与所述正电极片的上部面相结合的片固定部分，它有一个形成在那里的引向所述出口孔的通孔和一个形成在其上部边缘的钩形部分；和
一个支撑，它具有一个与所述钩形部分结合的结合部分和一个引向所述形成在其上的出口孔的通孔。
4.如权利要求1所述的矩形电池的顶盖组件，其中所述安全出口呈锥形。
5.如权利要求1所述的矩形电池的顶盖组件，还包括一个正电极端，正电极端有一个引向所述出口孔的通孔并与所述盖板的上部相结合，和一个插入在其间的绝缘板。
CN98105937A 1997-09-29 1998-03-31 矩形电池顶盖组件 Expired - Lifetime CN1111914C (zh)

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Application Number Priority Date Filing Date Title
KR49748/1997 1997-09-29
KR1019970049748A KR19990027311A (ko) 1997-09-29 1997-09-29 각형전지의 켑 조립체
KR49748/97 1997-09-29

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CN1111914C true CN1111914C (zh) 2003-06-18

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US (1) US5985478A (zh)
JP (1) JP4009016B2 (zh)
KR (1) KR19990027311A (zh)
CN (1) CN1111914C (zh)
CA (1) CA2232892C (zh)
DE (1) DE19811038C2 (zh)
GB (1) GB2329754B (zh)

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Publication number Publication date
KR19990027311A (ko) 1999-04-15
JPH11120979A (ja) 1999-04-30
US5985478A (en) 1999-11-16
CA2232892C (en) 2001-01-23
DE19811038C2 (de) 2000-07-06
GB9806834D0 (en) 1998-05-27
GB2329754B (en) 1999-08-11
JP4009016B2 (ja) 2007-11-14
GB2329754A (en) 1999-03-31
DE19811038A1 (de) 1999-04-01
CN1213188A (zh) 1999-04-07
CA2232892A1 (en) 1999-03-29

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