CN1449067A - 电池 - Google Patents
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Abstract
一种电池,是将隔板隔于正极板与负极板中间进行卷绕的极板组连同电解液一起收容在外装壳体内的构造,其特征在于,将极板组卷绕在卷芯上,将卷芯的两端部支承于外装壳体上。
Description
技术领域
本发明涉及电池,具体涉及一种将隔板隔于正极板与负极板中间进行卷绕的极板组连同电解液一起收容在外装壳体内所构成的电池。
背景技术
近年来,从地球的环境问题出发,希望开发电动汽车和复合动力汽车的呼声高涨,作为该电源的二次电池,希望在小型·轻量化的同时实现高容量化·高输出化。作为满足这种要求的二次电池,锂离子二次电池和镍氢电池等已实用化。
这种电池的构造可见例如日本专利特开平10-261427号公报的记载,已知有一种将隔板隔于正极板与负极板中间进行卷绕的极板组连同电解液一起收容在外装壳体内所构成的电池。参照图7对其电池30的构造作一说明,在长方体状的外装壳体31内,在该卷绕轴心与外装壳体31的开口平行的状态下收容有将隔板隔于正极板与负极板中间进行卷绕的极板组32,外装壳体31的开口由设置有负极端子38和安全阀39的盖子37密闭,极板组32的最外周的正极板34只作为芯材与外装壳体31连接,负极板35的端部与负极端子38由导线40连接。
又,作为电池的盖体上安装连接端子的构造,已知有例如日本专利特开平9-115500号公报的记载。参照图8作一说明,在连接端子51上设置有贯通盖体50的电极部52与盖体50的内侧面抵接的凸缘部53,在该凸缘部53与盖体50内面之间配置有O形环等的密封材料54,通过垫圈56将与电极部52的外周卡合的环状推压弹簧55压接在盖体50的外面,利用环状推压弹簧55的推压力将连接端子51固定在盖体50上。
然而,在图7所示的电池30的构成中,向电池30施加振动时,有一股大的力作用于该极板组32,有可能使涂于正极板34和负极板35的电极接合剂脱落等,对强度小的极板组32造成损伤而使电池特性急剧恶化。特别是在圆筒形的外装壳体中容置有卷绕成圆形的极板组所构成的圆筒形电池以外的电池中,这种问题尤为突出。
又,在图8所示的连接端子的安装构造中,连接端子的电极部52的安装角度相对于盖体50的内侧面未形成正确的垂直状态时,因密封材料54压缩量的变化,会出现密封性能下降、电池的密封性恶化和电池寿命缩短的问题。
本发明鉴于上述以往的问题,其目的在于,提供一种即使受到振动也不用担心会损伤极板组、密封性优良并在使用条件恶劣的情况下也能长期获得高可靠性的电池。
发明内容
本发明的电池是一种将隔板隔于正极板与负极板中间进行卷绕的极板组连同电解液一起收容在外装壳体内的构造,其特征在于,将极板组卷绕在卷芯上,将卷芯的两端部支持于外装壳体上,极板组经由卷芯支承在外装壳体上,由此,即使受到振动也不用担心会损伤极板组、在使用条件恶劣的情况下也能获得高可靠性。
采用本发明,极板组经由卷芯支承于外装壳体上,故即使受到振动等出不及担心会损伤极板组3,即使使用条件恶劣也可长期获得高可靠性。
附图的简单说明
图1为本发明一实施例的电池纵剖面主视图。
图2为图1的II-II向视横剖面图。
图3为图1的III-III向视横剖面图。
图4为图1的IV-IV向视横剖面图。
图5为图1的V部放大剖面图。
图6为本发明另一实施例的电池的纵剖面主视图。
图7为传统例的电池的纵剖面主视图。
图8为又一传统例的电池的连接端子部的纵剖面图。
具体实施方式
下面参照图1~图6说明本发明一实施例的电池结构。
在图1~图5中,1是电池,是一种将隔板隔于正极板与负极板中间进行卷绕的极板组3连同电解液一起收容在外装壳体2内的构造。外装壳体2由横剖面形状为长圆形或圆角长方形的平块状、或者大致正方体状的下端开口的容器2a和将其开口闭锁的盖板2b构成,盖板2b的外周通过焊接2c与容器2a的开口边端密封固定。
在极板组3的一端部露出有正极板的芯材,在另一端部将负极板的芯材以露出的状态卷绕在由合成树脂组成的平板状的卷芯4上。与极板组3上的各极板的芯材露出部对应的卷芯4的两端部形成了剖面三角形的扩大部4a,在该端面的一侧部凸设有剖面长圆形的连接凸部5。
在极板组3的两端面将集电体6a、6b配设成与露出的正极板或负极板的芯材抵接,并通过激光束焊接和电子束焊接等在多个部位分别与各极板的芯材焊接。图示例中,负极板的芯材露出于极板组3的上端,上部的集电体6a成为负极集电体,正极板的芯材露出于极板组3的下端,下部的集电体6b成为正极集电体。
又,在集电体6a、6b上设置有与凸设于卷芯4两端的连接凸部5的外周嵌合的长圆筒部7,通过将该长圆筒部7铆合于连接凸部5外周形成的相对应的铆接用凹部5a(参照图5)而将集电体6a、6b固定在卷芯4的两端部。
并且,集电体6a、6b在其外周缘形成有与外装壳体2内周嵌合的形状,并且,从其外周缘凸设有将极板组3的端部外周围住的环状凸边8。又,在上部的负极集电体6a以及极板组3的外周与外装壳体2的内周之间设有外周隔板9而使两者绝缘,下部的正极集电体6b的外周与外装壳体2的内周接触,同时在多个部位通过焊接10连接,在正极集电体6b与外装壳体2相互固定的同时电气连接。
与负极的连接端子11的下端部固接的连接盖子12将负极集电体6a的长圆筒部7的上端及外周盖住,通过焊接13将其周壁与长圆筒部7连接,在相互固定的同时电气连接。另一方面,在外装壳体2的上端壁的一侧部经由绝缘材料15地将贯通负极的连接端子11并进行的保持筒部14的下端部铆接固定。14a为其铆接部。
在保持筒部14的内周与连接端子11的外周之间形成有筒状空间16,在该筒状空间16内配置有一对O形环17以及介于其间的合成树脂制的筒状衬垫18,在其上面配置有加压环19,由铆接部14b进行闭止。
20是由外装壳体2将连接端子11连接时作用的回转扭矩支持用的止转板,其结构是下面具有将连接盖子12与连接端子11的贯通孔嵌合的凹部,其外周在与外装壳体2的内面嵌合的状态下接合。21是与外装壳体2的上端壁的另一侧部固接的正极的连接端子。
采用上述结构的电池1,由于在卷芯4上卷绕极板组3,该卷芯4的一端经由集电极6a的长圆筒部7、连接端子11、筒状衬垫18和保持筒部14与外装壳体2连结,卷芯4的另一端经由集电体6b与外装壳体2连结,因此,极板组3经由卷芯4被支承在外装壳体2上。即使受到振动等也不用担心会损伤极板组3,即使使用条件恶劣也可长期获得高可靠性。特别是在本实施例中,极板组3卷绕在平板状的卷芯4上,外装壳体2是横剖面形状长圆形或圆角长方形,与圆筒形电池相比,外装壳体与极板组的距离不均一,因此,虽然极板组3容易受损伤,但通过由卷芯4支持极板组3,可防止极板组的损伤。
又,由于露出于极板组3两端的极板的芯材与集电体6a、6b焊接,并将这些集电体6a、6b和卷芯4的两端部固定,因此,极板组3的两端经由集电体6a、6b固定在卷芯4上,并可使极板组3不易受损伤,同时缩短了极板的各部位与集电体6a、6b间的通电路径,可减小内部电阻,提高电池性能。
又,由于集电体6a、6b形成与外装壳体2内周嵌合的形状,同时从其外周缘凸设有将极板组的端部外周围住的环状凸边8,因此,可提高集电体6a、6b的刚性,并且,由于其集电体6a、6b的外周由外装壳体2支持,因此,极板组3可更加不容易造成损伤。又,在将极板组3插入配置于外装壳体2内时不用担心会损伤极板组3的外周端缘,还可提高组装作业性。
又,由于通过焊接10将正极的集电体6b的外周环状凸边8与外装壳体2连接于多个部位,通过焊接13将负极的集电体6a的长圆筒部7与连接端子11的连接盖子12的周壁部连接于多个部位,因此可减少电池1的内部电阻,提高电池特性。
又,由于在外装壳体2上设置有贯通连接端子11并向外部凸出的保持筒部14,在该保持筒部14的内周与连接端子11的外周之间配设有一对O形环17以及在其之间的筒状衬垫18,因此,利用筒状衬垫18可防止连接端子11的外周与保持筒部14的内周之间的间隙尺寸出现偏移和误差,配设于其两侧的O形环17均匀压缩,可靠地发挥其密封性能,并可进行双重密封,可确保对电池1密封性的高可靠性。
由此,采用本实施例的电池1,即使受到振动等也不用担心会损伤极板组,且密封性高,即使使用条件恶劣也可长期获得高可靠性。
上述实施例的说明是将正极的连接端子21与外装壳体2的容器2a的上端面的另一侧部固接、将负极和正极的连接端子11、21配设于外装壳体2的上端两侧面的示例,但也可如图6所示,将正极的连接端子21与外装壳体2的盖板2b的一侧部固接,将负极与正极的连接端子11、21凸设于外装壳体2的一侧部的两端。
又,上述说明是将保持筒部14与外装壳体2铆接固定的示例,但也可采用焊接方式固定。又,加压环19的剖面形状并不限定于图示例的大致三角形,也可为方形等。
Claims (6)
1.一种电池,是将隔板隔于正极板与负极板中间进行卷绕的极板组连同电解液一起收容在外装壳体内的构造,其特征在于,所述极板组卷绕在卷芯上,所述卷芯的两端部支持于所述外装壳体上。
2.如权利要求1所述的电池,其特征在于,所述外装壳体的横剖面形状为长圆形或圆角长方形,所述卷芯为平板状。
3.如权利要求1所述的电池,其特征在于,在所述极板组的两端分别露出有正极板和负极板的芯材并与配设成分别与所述极板组的两端面抵接的集电体焊接,并将所述集电体与所述卷芯的两端部固定。
4.如权利要求3所述的电池,其特征在于,所述集电体的外周缘形成与外装壳体内周嵌合的形状,同时从其外周缘凸设有将极板组的端部外周围住的环状凸边。
5.如权利要求3所述的电池,其特征在于,所述集电体焊接在所述外装壳体或固定于所述外装壳体的连接端子上。
6.如权利要求1所述的电池,其特征在于,在所述极板组的两端分别露出有正极板和负极板的芯材并与配设成分别与所述极板组的两端面抵接的集电体焊接,将连接端子与至少一方的集电体焊接,连接端子贯通于外装壳体,并设置有向外部凸出的保持筒部,在连接端子外周与保持筒部的内周之间配设有一对密封材料以及在其密封材料之间的衬垫筒。
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Cited By (8)
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JP3426859B2 (ja) | 1996-06-27 | 2003-07-14 | 三洋電機株式会社 | 二次電池 |
JPH10261427A (ja) | 1997-03-18 | 1998-09-29 | Japan Storage Battery Co Ltd | 電 池 |
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- 2002-03-29 JP JP2002094222A patent/JP4056279B2/ja not_active Expired - Fee Related
-
2003
- 2003-03-24 US US10/395,684 patent/US7192671B2/en not_active Expired - Fee Related
- 2003-03-27 CN CNB031088554A patent/CN1243392C/zh not_active Expired - Fee Related
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CN107949947A (zh) * | 2016-02-26 | 2018-04-20 | 能质力量系统股份有限公司 | 双极性电池 |
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Also Published As
Publication number | Publication date |
---|---|
CN1243392C (zh) | 2006-02-22 |
JP4056279B2 (ja) | 2008-03-05 |
JP2003297413A (ja) | 2003-10-17 |
US7192671B2 (en) | 2007-03-20 |
US20030186113A1 (en) | 2003-10-02 |
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