CN100407492C - 带有粘结罩的碱性电化学电池 - Google Patents
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Abstract
一种密闭电化学电池容器的开口端的粘结罩。本发明还提供一种带有粘结罩的非弯曲式碱性电化学电池,所述电化学电池包括:带有开口端和侧壁的容器;布置在容器内的正电极;布置在容器内的负电极;布置在容器内的碱性电解液;布置在容器的开口端上的盖;布置在盖与容器之间的第一粘结剂,以及布置在盖与容器之间的第二粘结剂,其中所述第一和第二粘结剂这样设置:让第一粘结剂靠近所述容器的开口端,所述第二粘结剂离容器的开口端更远,靠近所述容器的开口端的所述第一粘结剂能与氢氧化钾碱性电解液化学共存。
Description
技术领域
概括而言,本发明涉及一种电化学电池,即蓄电池,具体涉及用于密闭碱性蓄电池容器的开口端的密封罩组件。
背景技术
传统的碱性电化学电池一般包括带有正电极的钢制圆柱形筒,所述正电极被称为阴极,它包括用作活性物质的二氧化镁。电化学电池还包括负电极,它被称为阳极,包括用作活性物质的锌粉。在筒管型电池结构中,通常要靠着密封筒的内表面设置阴极,而阳极一般设置在筒中央。可选择的是,在胶辊(jelly-roll)型电池中,阳极和阴极以螺线方式缠绕。在阳极和阴极之间设有隔板,通常含有氢氧化钾(KOH)的碱性电解液同时与阳极、阴极和隔板接触。一般在阳极活性物质中插有导电的集流器,包括密封部件的密封组件提供了对钢筒开口端的罩,由此将活性电化学物质密封在筒的密闭体积内。
一般是通过把预装配的集电器和密封组件插到钢筒的开口端内,从而将该组件布置在钢筒内部,由此封闭圆柱形的碱性电池。集电器和密封组件一般包括集电钉、环形尼龙密封件、以及径向支撑尼龙密封件的内金属盖。一般在钢筒的开口端有一个锥形或者向内延伸的垫,其用于在它固定到位之前将集电器和密封组件支撑在理想方位上。在把集电器和密封组件插到筒中以后,将外金属盖置于密封组件上方,通过径向地将筒挤压到集电器和密封组件以及外盖上,然后让筒的边缘弯到集电器、密封组件和外盖的周向边缘上,以便将外盖、集电器和密封组件固定到钢筒的开口端内,由此将该组件和盖固定到位。
有时要在筒和密封界面上涂覆沥青类密封剂,用以进一步防止碱性电解液通过弯曲的罩泄漏出来。密封剂用于防泄漏目的,而弯曲的罩提供了圆筒罩壳的结构机械强度。通常要求密封剂能化学地耐受蓄电池内部成分的腐蚀,这些内部成分包括通常含氢氧化钾的碱性电解液。利用传统的弯曲罩技术,密封组件要占用大量筒内体积,并限制了可用于包括正负电极在内的活性电化学物质的高度。
于是,理想的是提供一种用于容器开口端的非弯曲式密封罩,它能为碱性电化学电池提供坚固的机械密闭。另外,希望提供一种考虑高度延长电极的密封罩。
发明内容
本发明通过以下方式提供了一种用于碱性电化学电池容器的开口端的粘结罩:它能提供强力机械粘结,并能耐受电化学活性成分的腐蚀。为了实现这一目的和其它优点,并依照此处体现和描述的本发明的目的,本发明提供了一种包括带有开口端和侧壁的容器的电化学电池。容器内设有正负电极。容器的开口端设有盖,所述盖优选带有在容器的侧壁外部径向延伸的外周壁。在容器的外侧壁与盖的外周壁之间设有粘结剂,用以将所述盖粘到容器上。
本发明还提供了一种带有粘结罩的非弯曲式碱性电化学电池,所述电化学电池包括:带有开口端和侧壁的容器;布置在容器内的正电极;布置在容器内的负电极;布置在容器内的碱性电解液;布置在容器的开口端上的盖;布置在盖与容器之间的第一粘结剂,以及布置在盖与容器之间的第二粘结剂,其中所述第一和第二粘结剂这样设置:让第一粘结剂靠近所述容器的开口端,所述第二粘结剂离容器的开口端更远,靠近所述容器的开口端的所述第一粘结剂能与氢氧化钾碱性电解液化学共存。
通过参照以下说明、技术方案和附图,本领域的普通技术人员将进一步认识并理解本发明的这些和其它特征、优点和目的。
附图说明
附图中:
图1是依照本发明第一实施例的电化学电池的纵向局部剖视图,该电池带有用于密闭所述筒的开口端的粘结罩组件;以及
图2是依照本发明第二实施例的电化学电池的纵向局部剖视图,该电池带有用于密闭所述筒的开口端的粘结罩组件。
具体实施方式
参照图1,它示出了依照本发明第一实施例的圆柱形碱性电化学电池10,该电池带有用于密封电池容器开口端的粘结罩组件。电化学电池10包括圆柱形钢筒12,所述钢筒有封闭的底端14、开口顶端16、以及在顶端和底端之间延伸的侧壁。筒12的封闭底端14包括在它的中央区域上设置的突块18,用于提供电池10的正极接触端子。正极接触端子18可一体地设置到筒12的底端14内,或者可焊接或通过其它方式连接到筒12的平坦底端。
与钢筒12的开口顶端16进行装配的是金属盖30,它覆盖并密闭住钢筒12的开口端16。金属盖30用作电池10的负极接触端子。可将负极金属盖30焊到或者通过其它方式电连接到集流器28上,集流器包括一根铜钉,它带有细长的主体和在一端扩大的头部。在此通过依照本发明描述的粘结罩组件将盖30密闭到钢筒12上。
在钢筒12的外表面周围,除了钢筒12的端部外都设有金属化的塑料薄膜标签20。正如所示的,薄膜标签20设置在钢筒12的底端14的外围边缘上,并部分地延伸到负极盖30上。
在钢筒12的内表面周围设置阴极22。依照一个例子,阴极22由二氧化镁、石墨、氢氧化钾溶液以及添加剂组成的混合物构成。在阴极22的内表面周围布置了隔离件24,它由无纺织物制成,可防止电池中任何固态颗粒的迁移。将阳极26连同电解质一起安置到隔离件24中,让它们与集流器28接触。依据一个例子,阳极26由锌粉、凝胶剂和添加剂构成。于是,将阴极22构造成正电极,将阳极26构造成负电极。虽然示出的是圆柱形的筒管型电池结构,但应当理解的是,电化学电池10还可按其它方式构造,例如胶辊电池结构或者微型钮扣型电池结构。
钢筒12的上端具有朝里的阶梯形表面,该表面向着钢筒12开口端的中央纵轴径向朝里延伸。钢筒12包括朝里的第一阶梯形表面34,它以一定倾角径向朝里过渡。在表面34与钢筒12的开口端16之间设有第二阶梯形表面35,它以一定倾角进一步径向朝里过渡。于是第二阶梯形表面35与第一阶梯形表面34相比,它被设置得更加径向朝里。
负极盖30一般为杯形,它具有环绕钢筒12的侧壁表面34和35的外部延伸的外周壁。于是,外周壁32被设置成由侧壁表面34和35径向朝外,并基本上与它们平行地延伸。负极盖30包括基本上与钢筒12内的阶梯形表面35的过渡部分相符的阶梯形表面33,它被构造成能与密封部件38接合,由此形成密封罩。外周壁32借助沿阶梯形表面34设置的粘结剂层36粘到钢筒12的外表面上。粘结剂层36包括环氧,例如可通过商业方式从Minnesota的Mining andManufacturing Company获得的、以SCOTCH-WELD2216为商标出售的双组分环氧。例如采用了前述环氧的粘结剂层36包括诸如双酚A环氧树脂的环氧树脂,它的CAS号是25068-38-6,它要与适宜的聚合物(固化剂)结合使用。应当理解,在不脱离本发明教导的条件下还可以采用其它粘结剂。其它适宜的粘结剂的例子包括:SCOTCH-WELD环氧胶DP-190,它也可以通过商业方式从Minnesota的Mining and Manufacturing Company获得;含双酚A二环氧甘油(diglyclyd1)醚树脂的5分钟环氧树脂,它的CAS号是25068-38-6,可通过商业方式从ITW Devcon获得;以及Armstrong MD-48树脂,它的化学名称是基于双酚A/表氯醇的环氧,其CAS号为25068-38-6,并能以商业方式从Armstrong Products Division获得。
位于筒12的阶梯形表面35与盖30的阶梯形表面33之间的是尼龙密封件38。尼龙密封件38的形状为同心环形,通常它优选布置在第一阶梯形表面34上进行密封,并防止氢氧化钾溶液泄漏,进而与粘结剂层36接触。于是,负极盖30的外周壁32朝外径向延伸到密封件38以及钢筒12的阶梯形侧壁表面34和35上,以便通过粘结剂层36将外周壁32粘结到阶梯形表面34上,并将密封件38压在外周壁32的表面33与钢筒12的阶梯形表面35之间。在粘结剂层36固化的过程中或在固化以后,将负极盖30向下置于钢筒12上促使压缩密封件38。粘结剂层36有利地提供了强力机械粘结,用以维持盖30对钢筒12的密闭,同时密封件38能防止电解液从电化学电池10内漏到外部环境中。
应当理解的是,不用弯曲罩就能将本发明的盖组件安装到钢筒12上,于是产生了非弯曲式碱性电化学电池。作为代替,可将负极盖30插到钢筒12的开口端16的顶部上方,这样将盖30的外周壁32由钢筒12的侧壁的阶梯形表面34和35朝外径向布置。外周壁32的最外端借助粘结剂层36粘到钢筒12上,并位于产生第一阶梯形表面34的有角度倾斜面上。粘结剂层36还用作电介质,以便将负极盖30与钢筒12电绝缘,从而能在将负极盖30机械粘结到钢筒12上的同时,维持正极和负极的隔离状态。另外,受压缩的密封件38能防止碱性电解液漏泄,从而不会让粘结剂层与氢氧化钾接触。于是,负极盖30可通过以下方式向下布置在钢筒12上:挤压钢筒12的表面35与外周壁32之间的密封件38,以便提供足以防止碱性电解液从电化学电池10的内部体积泄漏出来的密封接合。通过消除了对弯曲罩的要求,电化学电池10有利地允许阴极22和阳极26延伸得更靠近钢筒12的开口端,于是为活性电化学物质提供了更大的内部可用高度。
参照图2,碱性电化学电池110的顶部示有依照本发明第二实施例的粘结罩组件。电化学电池110同样包括:具有封闭的底端(未示出)、侧壁和开口顶端的钢筒112,阴极22,隔离件24,阳极26,以及集流器28。钢筒112的侧壁包括径向朝里的阶梯形表面134,它靠近钢筒112的开口端。电化学电池110包括通过焊接或其它方式连接到集流器28上的外负极盖130。集流器28插到聚合密封件138的开孔内,并与聚合密封件138粘结。同时,密封件138和负极盖130构成用于封闭钢筒112的开口端的盖组件。密封件138借助粘结剂层粘到钢筒112上,分别将它们表示成上部135和下部136。聚合物密封件138由尼龙或者其它适宜材料构成。
更具体而言,密封件138的内表面与钢筒112的阶梯形表面134的外表面粘结。上部粘结剂层135能与氢氧化钾碱性电解液化学共存,因此它不易受氢氧化钾的损害而导致额外泄漏。同样,下部粘结剂层136优选与氢氧化钾碱性电解液化学共存。粘结剂层135和136的例子包括上面结合粘结剂层36讨论的环氧树脂。但应当理解的是,下部粘结剂层136还可采用不太耐受氢氧化钾引起的损害的其它粘结剂,这是因为上部粘结剂层135可以避免氢氧化钾进入下部粘结剂层136。下部粘结剂层136包括以下粘结剂:例如,Loctite的产品3650聚烯烃热熔粘结剂,Loctite的产品3642的聚酰胺热熔粘结剂和尿烷密封剂,所有这些产品都可通过商业方式从Loctite公司获得,以及Dow Corning 730耐溶剂型密封剂(100%的氟硅橡胶),它可通过商业方式从Dow Corning公司得到。密封件138沿钢筒112的侧壁外部径向延伸,从而留出钢筒112的开放体积用于活性电化学物质。于是,阳极26和阴极22所能使用的高度要高于传统弯曲罩电池组件所能允许的高度。
于是,本发明有利地提供了一种在无需弯曲罩的情况下密封和密闭蓄电池容器开口端的粘结罩组件。将通过粘结方式粘结的盖粘结并密封到蓄电池筒上,就能在提供较强的机械粘结强度从而将盖密闭到钢筒上的同时,又能防止碱性电解液的泄漏。另外,通过将盖以粘结方式粘到电池10和110的钢筒外周壁上,就能得到更多的内部体积用于活性电化学电极物质,这有利地提高了使用性能。
那些实践本发明的人和本领域的普通技术人员可以理解到,在不脱离本发明公开内容的精神的条件下,能对本发明作出各种修改和改进。所给予的保护范围要由技术方案和法律所允许的解释宽度来确定。
Claims (4)
1.一种带有粘结罩的非弯曲式碱性电化学电池,所述电化学电池包括:
带有开口端和侧壁的容器;
布置在容器内的正电极;
布置在容器内的负电极;
布置在容器内的碱性电解液;
布置在容器的开口端上的盖;
布置在盖与容器之间的第一粘结剂,以及
布置在盖与容器之间的第二粘结剂,
其中所述第一和第二粘结剂这样设置:让第一粘结剂靠近所述容器的开口端,所述第二粘结剂离容器的开口端更远,靠近所述容器的开口端的所述第一粘结剂能与氢氧化钾碱性电解液化学共存。
2.根据权利要求1所述的电化学电池,其中所述第一粘结剂包括含双酚A的环氧树脂。
3.根据权利要求1所述的电化学电池,其中所述盖包括一个密封件。
4.根据权利要求1所述的电化学电池,其中所述盖具有位于容器外表面上的外周壁。
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US09/721,250 US6605383B1 (en) | 2000-11-22 | 2000-11-22 | Alkaline electrochemical cell having adhesive closure |
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KR100833736B1 (ko) * | 2006-10-24 | 2008-05-29 | 삼성에스디아이 주식회사 | 전지 팩 |
US7769467B1 (en) | 2007-01-31 | 2010-08-03 | Advanced Bionics, Llc | Level-dependent stimulation methods and systems |
US8236444B2 (en) * | 2007-03-27 | 2012-08-07 | Eveready Battery Company, Inc. | Electrochemical cell having low volume collector assembly |
US7945323B2 (en) * | 2007-04-13 | 2011-05-17 | Boston Scientific Neuromodulation Corporation | Treatment of obesity and/or type II diabetes by stimulation of the pituitary gland |
US20090005756A1 (en) * | 2007-06-29 | 2009-01-01 | Boston Scientific Neuromodulation Corporation | Methods and Systems of Treating Strabismus |
US8600512B2 (en) * | 2007-12-26 | 2013-12-03 | Boston Scientific Neuromodulation Corporation | Methods and systems for treating seizures caused by brain stimulation |
US8914112B2 (en) * | 2008-01-23 | 2014-12-16 | Boston Scienctific Neuromodulation Corporation | Methods and systems of treating pancreatitis pain caused by sphincter of Oddi dysfunction |
US8060209B2 (en) * | 2008-01-25 | 2011-11-15 | Boston Scientific Neuromodulation Corporation | Methods and systems of treating ischemia pain in visceral organs |
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- 2001-11-21 CN CN2006100090770A patent/CN100407492C/zh not_active Expired - Fee Related
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EP1382076B1 (en) | 2005-11-09 |
ATE309619T1 (de) | 2005-11-15 |
US20040033417A1 (en) | 2004-02-19 |
EP1382076A2 (en) | 2004-01-21 |
CN1819319A (zh) | 2006-08-16 |
DE60114893D1 (de) | 2005-12-15 |
WO2002043165A2 (en) | 2002-05-30 |
CN1547781A (zh) | 2004-11-17 |
JP4122224B2 (ja) | 2008-07-23 |
DE60114893T2 (de) | 2006-07-20 |
WO2002043165A3 (en) | 2003-11-27 |
JP2004515038A (ja) | 2004-05-20 |
US6605383B1 (en) | 2003-08-12 |
AU2002216698A1 (en) | 2002-06-03 |
HK1062609A1 (en) | 2004-11-12 |
US7267905B2 (en) | 2007-09-11 |
CN1263176C (zh) | 2006-07-05 |
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