CN102263281B - 一种电池卷芯上的支撑体 - Google Patents

一种电池卷芯上的支撑体 Download PDF

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CN102263281B
CN102263281B CN201110153749.6A CN201110153749A CN102263281B CN 102263281 B CN102263281 B CN 102263281B CN 201110153749 A CN201110153749 A CN 201110153749A CN 102263281 B CN102263281 B CN 102263281B
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battery
support body
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CN102263281A (zh
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张练武
王福全
程树国
唐朝化
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HENAN HUANYU POWER SUPPLY Co Ltd
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HENAN HUANYU POWER SUPPLY Co Ltd
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    • YGENERAL 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
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    • YGENERAL 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
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Abstract

本发明公开了一种电池卷芯上的支撑体,支撑体上打有套装电池卷芯的偏心孔,偏心孔与支撑体的外周面上有一纵向切口,偏心孔的外周缘上是飞边,偏心孔的底部有通气孔通向支撑体的末端,支撑体的形状是几何柱体,支撑体的直径1-30mm,高度10-100mm,支撑体的材料是非导电材料。本发明具有以下效果:电池卷芯套入特制支撑体或多棱柱支撑体中形成一种特制电池芯,卷绕后正极负极之间的接触紧密,电池的内阻低,使得电池的电流效率高;由于装配松紧度高,即使电极材料有膨胀,活性物质也不容易发生脱落,容量下降不明显;由于装配松紧度合适,即使电极材料有膨胀,活性物质较少脱落,电池内部微短路和短路的概率少,电池寿命稳定。

Description

一种电池卷芯上的支撑体
技术领域:
本发明涉及一种电池卷芯上的支撑体,可适应于AAAAA、AAAA、AAA、N、AA、A、SC、C、D等型号的圆柱密封性低容量电池上使用。
背景技术:
目前的圆柱密封性电池卷芯按正极片、隔膜、负极片的顺序卷绕而成,依据极片和隔膜工艺设计,卷绕后的电芯中心和电芯上部会有一定大小的气室空隙,一方面可注入电解液润湿整个电芯,一方面是反应空间需要,特别是对低容量电池而言,这种气室空隙会特别大,原因是圆柱密封性电池的能量密度比较高,材料密度较大,无论如何设计,总无法满足填充电池内的相对多余的气室空隙,就会在电池中留下很大的相对多余的气室空隙。按照常规设计,将会出现如下问题电池电芯卷绕后较为松动,正负极之间接触不够紧密,导致电池的内阻剧增,使得电池的电流效率较低,由于电极材料在湿润后会发生膨胀,活性物质会发生脱落,将导致容量的下降和电池内部短路,影响电池的使用寿命,电池在运输使用过程中由于震动、颠覆而加剧电芯的松动,内阻剧增,短路抗压强度低。再者因为板极宽度较窄,而长度较长,导致长宽比差距很大,易在操作过程中造成断片,从而造成成本高,合格率低,更不用说稳定的电性能。本发明的同日申请了同样的实用新型,申请号201120192416.X。
发明内容:
本发明的任务是提出一种提高正负极反应效率,电解液分布均匀,电池的内阻,电性能稳定的一种特制电池卷芯上的支撑体。本发明是这样完成的,一种电池卷芯上的支撑体,其特征在于:支撑体上打有套装电池卷芯的偏心孔,偏心孔与支撑体的外周面上有一纵向切口,偏心孔的外周缘上是飞边,偏心孔的底部有通气孔通向支撑体的末端,支撑体的形状是几何柱体,支撑体的外周面上纵向切口的深度是10-100mm,支撑体的直径1-30mm,高度10-100mm,支撑体的材料是非导电材料。本发明具有以下效果:1、电池卷芯套入特制支撑体或多棱柱支撑体中形成一种特制电池芯,卷绕后正极负极之间的接触紧密,电池的内阻低,使得电池的电流效率高;2、由于装配松紧度高,即使电极材料有膨胀,活性物质也不容易发生脱落,容量下降不明显;3、由于装配松紧度合适,即使电极材料有膨胀,活性物质较少脱落,电池内部微短路和短路的概率少,电池寿命稳定;4、电池在运输使用过程中都可能由于震动、颠簸,电芯并不容易松动、内阻稳定、活性物质较少脱落、短路抗压强度较高;5、在特制圆柱支撑体、多棱柱支撑体中,我们设计的极板宽度会适当加宽,而长度缩短,这样长宽比就在合适的范围内,在实际卷绕生产操作过程中不容易造成断片,极大地提高产品合格率,将低容量电池的单位成本压缩至合适范围,同时达到稳定的电性能。
附图说明:
图1是实施例一的电池卷芯结构示意图;图2是实施例二的电池卷芯结构示意图;图3是圆柱支撑体的结构示意图;图4是圆柱支撑体的一个端面A向视图;图5是圆柱支撑体的一个端面的俯视图;图6是圆柱支撑体的图3B部放大示意图,图7是多棱柱支撑体的结构示意图;图8是多棱柱支撑体的一个端面A向视图;图9是多棱柱支撑体的一个端面的俯视图;图10是多棱柱支撑体的图3B部放大示意图。
图面说明:1、支撑体,2、负极壳,3、电池卷芯,4、通气孔,5、实体内空芯,6、偏心孔,7、飞边,8、纵向切口。
具体实施方式:
实施例一:
结合以上附图详细描述实施例:详细描述实施例一,卷绕机将电池的正极片、负极片通过隔膜相隔离,并缠卷在一起形成电池卷芯3,支撑体1上打有套装电池卷芯3的偏心孔6,偏心孔6与支撑体1的外周面上有一纵向切口8,支撑体的外周面上纵向切口的深度是10mm,支撑体1的偏心孔6的外周圆上是飞边7,(图1、图3、图4、图5、图6)支撑体1的材料可选用塑料、橡胶等非导电材料,支撑体1的形状是圆柱体,支撑体1的直径1mm,高度10mm,支撑体1的纵向切口8的末端可制成实体内空芯5(见图3),以减少支撑体1的材料用量,实体内空芯5与纵向切口8的底端开有通气孔4。将电池卷芯3插入偏心孔6内,飞边7变形进入负极壳2,并使支撑体1外周紧贴负极壳2,使电池电芯3从纵向切口8露出,与负极壳2触接后形成负极端,从而使电池卷芯3不易松动,内阻稳定,减少活性物质脱落,抗短路和抗压,同时达到稳定的电性能。
实施例二:
结合以上附图详细描述实施例二,卷绕机将电池的正极片、负极片通过隔膜相隔离,并缠卷在一起形成电池卷芯3,支撑体1上打有套装电池卷芯3的偏心孔6,偏心孔6与支撑体1的外周面上有一纵向切口8,支撑体的外周面上纵向切口的深度是100mm,支撑体1的偏心孔6的外周圆上是飞边6,支撑体1的材料可选用树脂、粘土、陶瓷等非导电材料,支撑体1的形状是多棱柱体(图2、图7、图8、图9、图10),支撑体1的外接圆直径30mm,高度100mm,支撑体1的纵向切口8的末端可制成实体内空芯5(见图7),以减少支撑体1的材料用量。将电池卷芯3插入偏心孔6内,飞边7变形入负极壳2,并使支撑体1外周紧贴负极壳2,使电池电芯3从纵向切口8露出,与负极壳2触接后形成负极端,从而使电池卷芯3不易松动,内阻稳定,减少活性物质脱落,抗短路和抗压,同时达到稳定的电性能。

Claims (2)

1.一种电池卷芯上的支撑体,其特征在于:支撑体上打有套装电池卷芯的偏心孔,偏心孔与支撑体的外周面上有一纵向切口,偏心孔的外周缘上是飞边,偏心孔的底部有通气孔通向支撑体的末端,支撑体的材料是非导电材料,支撑体的外周面上纵向切口的深度是10-100mm,支撑体的直径1-30mm,高度10-100mm。
2.根据权利要求1所述的一种电池卷芯上的支撑体,其特征在于:支撑体的形状是几何柱体。
CN201110153749.6A 2011-06-02 2011-06-02 一种电池卷芯上的支撑体 Expired - Fee Related CN102263281B (zh)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820077A (zh) * 2010-04-16 2010-09-01 广州市云通磁电有限公司 一种卷绕式方形电池专用支撑体的制造方法
CN202084606U (zh) * 2011-06-02 2011-12-21 河南环宇电源股份有限公司 一种电池卷芯上的支撑体

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820077A (zh) * 2010-04-16 2010-09-01 广州市云通磁电有限公司 一种卷绕式方形电池专用支撑体的制造方法
CN202084606U (zh) * 2011-06-02 2011-12-21 河南环宇电源股份有限公司 一种电池卷芯上的支撑体

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