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CN2840334Y - 一种锂离子电池盖板、电池壳及电池 - Google Patents

一种锂离子电池盖板、电池壳及电池 Download PDF

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CN2840334Y
CN2840334Y CNU200520034561XU CN200520034561U CN2840334Y CN 2840334 Y CN2840334 Y CN 2840334Y CN U200520034561X U CNU200520034561X U CN U200520034561XU CN 200520034561 U CN200520034561 U CN 200520034561U CN 2840334 Y CN2840334 Y CN 2840334Y
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seal
liquid injection
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lithium ion
ion battery
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赵俊峰
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Shenzhen Bak Battery Co Ltd
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Priority to EP06741823.6A priority patent/EP1892779A4/en
Priority to KR1020087001100A priority patent/KR20080041623A/ko
Priority to PCT/CN2006/000930 priority patent/WO2006133618A1/zh
Priority to US11/922,352 priority patent/US20090111016A1/en
Priority to JP2008516107A priority patent/JP2008544445A/ja
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • H01M50/15Lids or covers characterised by their shape for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627Filling ports
    • H01M50/636Closing or sealing filling ports, e.g. using lids
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627Filling ports
    • H01M50/636Closing or sealing filling ports, e.g. using lids
    • H01M50/645Plugs
    • 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Filling, Topping-Up Batteries (AREA)
  • Secondary Cells (AREA)

Abstract

本实用新型公开了一种锂离子电池盖板,包括盖体和密封件,所述盖体上设有注液孔,所述密封件至少部分位于注液孔中与注液孔紧配合将其密封,所述密封件具有突缘,延伸于注液孔外,限制密封件进入注液孔的深度。本实用新型并公开了具有上述电池盖板组件的电池壳和锂离子电池。本实用新型有益的技术效果在于:在密封件上设置突缘,使得在冲压密封时能够容易的控制密封件进入注液孔的深度,避免现在封装技术中出现的冲压不到位或过深而引起的密封不良。

Description

一种锂离子电池盖板、电池壳及电池
【技术领域】
本实用新型涉及锂离子电池封装技术,具体涉及锂离子电池盖板、电池壳及电池。
【背景技术】
锂离子电池是一种大容量、高功率的电池,其主要应用于小型设备上,特别是移动电话。锂离子电池一般是由电池盖板组件、电池罐、电解液以及由正、负极片和隔膜纸卷绕成的电池卷芯组成。现有技术中进行锂离子电池的封装通常采用这样的步骤:先将卷绕好的电池卷芯装入电池罐内;然后将正负极片连接引带与盖板组件焊接;再将盖板通过激光焊接方式密封在电池罐的开口部,这样就形成了一个装有电池卷芯的容器;再通过盖板上的注液孔将电解液注入容器内部,最后将注液孔密封。目前,注液孔的密封是通过将钢球冲入注液孔中与注液孔过盈配合来实现的。
由于钢球嵌入注液孔的深度要求精度比较高,而冲压时钢球的深度时浅时深不易控制,容易引起密封不良而漏液;另外钢球是实心的刚性部件,又与注液孔过盈配合,这就使得冲压钢球封口时需要比较大的压力,有可能引起电池壳体变形。
【发明内容】
本实用新型的目的提供一种容易控制密封件进入注液孔深度,有效改善密封效果的锂离子电池盖板、电池壳及电池。
为了达到上述目的,本实用新型所采取的技术方案是:一种锂离子电池盖板,包括盖体和密封件,所述盖体上设有注液孔,所述密封件至少部分位于注液孔中与注液孔紧配合将其密封,所述密封件具有突缘,延伸于注液孔外,限制密封件进入注液孔的深度。
优选的是,所述密封件具有顶端封闭的中空形状,所述突缘为密封件敞口端向外延伸的挡边。
优选的是,所述密封件为实心杆状,所述突缘为位于其顶端的帽盖。
进一步优选的是,所述注液孔呈沉头孔型,包括位于下部的直孔和位于上部的沉头,所述密封件下部位于直孔中,其突缘位于沉头中。
更优选的是,所述突缘外沿直径大于沉头内径,并卡紧在沉头中。
为本实用新型的目的还提供,一种锂离子电池壳,包括电池罐和封闭其开口的电池盖板组件,所述电池盖板组件具有上述结构。
以及一种具有上述电池壳的锂离子电池。
采用上述技术方案,结合下面将要详述的实施例,本实用新型有益的技术效果在于:1)在密封件上设置突缘,使得在冲压密封时能够容易的控制密封件进入注液孔的深度,避免现在封装技术中出现的冲压不到位或过深而引起的密封不良。2)由于目前采用的密封钢珠直径很小,大约为1mm左右,直接在其上设置突缘从制造上讲是比较困难的,这也是其缺陷一直未获改进的原因所在。为解决这一问题,本实用新型提供了两种易于实现的密封件结构:采用具有顶端封闭的中空形状的密封件较实体密封对冲压力的需要更低,且中空构造能充分发挥过盈配合所产生的压力,更有利于将密封件充分而受力均匀的压紧在注液孔内;采用带有帽盖的杆型密封件,则具有制造容易,且密封稳定性好等优点。3)注液孔采用沉头孔,其沉头部位的凹陷,使得密封件的限位突缘不易在电池组装的后续流程中被其他部件所干扰,保证密封的可靠性。4)将突缘与沉头紧配合设置,能够使其与位于注液孔中的密封件一同起到双重卡紧的作用,保证密封件与注液孔的紧密贴合,特别是对于支撑部采用中空结构的情形,突缘卡紧的同时会增大中空部分向外的弹力,该弹力垂直于密封件与注液孔的贴合面,能够有效增强密封件的密闭能力。
下面通过具体实施方式并结合附图对本实用新型作进一步的详细说明。
【附图说明】
图1是一种锂离子电池盖板。
图2是密封件立体图。
图3是密封件轴向剖视图。
图4是注液孔轴向剖视图。
图5是另一种密封件轴向剖视图。
图6是方形锂离子电池壳体示意图。
【具体实施方式】
实施例一、一种锂离子电池盖板,结合图1~图4,包括盖体和密封件1,盖体包括极板2和盖面3。极板2和盖面3上设有注液孔4,
密封件1具有图2与图3所示的结构,具有顶端封闭的中空形状,其敞口端向外延伸出作为突缘的挡边11。其中空部分12的外径为a,挡边11的外径为b。
注液孔4具有图4所示的结构,呈沉头孔型,包括位于下部的直孔42和位于上部的沉头41。直孔42的内径为c,沉头41的内径为d。
密封件1中空部分12的外径a大于注液孔4直孔42的内径c;挡边11外径为b大于沉头41的内径d。因此,密封件1卡紧在注液孔4中对其进行密封。
上述实施例中,注液孔设置沉头的主要目的是为了容纳密封件的突缘,因此也可以采用其他形状例如带有倾斜面的沉头等,只要注液孔具有能够容纳紧突缘的凹陷就可以了。此外,如果突缘与沉头紧配合的话,还能起到进一步加强密封效果的作用。当然,如果注液孔就采用目前常用的直孔或倾斜直孔也是可以的,只是将不具备上述优越性。
密封件上的突缘其主要作用是在冲压时成为限位部件,控制密封件进入注液孔的深度,因此,对其形状没有限制。密封件位于注液孔中的部分也可以有各种形状和结构的选择,只要能够对其进行封闭即可,与常见实心钢球相比本例中的中空结构能够有更小的冲压力要求和更好的效果。此实心密封件还可以采用螺钉型结构,即在实心杆体上具有帽盖型突缘,如图5所示。突缘如果露出注液孔外(注液孔未设置沉头的情况),最好能够与盖体表面有较为平缓的过渡,这样能尽量避免在后续工序中被其他部件所影响。突缘如果位于沉头中,则最好能够与之紧配合,以提供更好密封效果,这种结构是特别优选的。
实施例二、一种锂离子电池壳,结合图6,包括电池罐5和封闭其开口的电池盖板组件,所述电池盖板组件具有实施例一中所述结构。
实施例三、一种锂离子电池,包括锂离子电池壳和封装在其中的电池电芯。所述电池壳具有实施例二中所述结构。
应当理解的是,本发明的所述的锂离子电池盖板的的极板、盖面还可以设计成其他形状,例如圆形,相应的锂离子电池壳体及锂离子电池可以设计成圆柱形等。上述针对较佳实施例的描述仅为更好的理解本发明而提供,不能因此而理解为对本发明的专利保护范围的限制,其专利保护范围应以所附权利要求为准。

Claims (10)

1、一种锂离子电池盖板,包括盖体和密封件,所述盖体上设有注液孔,所述密封件至少部分位于注液孔中与注液孔紧配合,将其密封,其特征是:所述密封件具有突缘,延伸于注液孔外,限制密封件进入注液孔的深度。
2、根据权利要求1所述的锂离子电池盖板,其特征是:所述密封件具有顶端封闭的中空形状,所述突缘为密封件敞口端向外延伸的挡边。
3、根据权利要求1所述的锂离子电池盖板,其特征是:所述密封件为实心杆状,所述突缘为位于其顶端的帽盖。
4、根据权利要求1~3任意一项所述的锂离子电池盖板,其特征是:所述注液孔呈沉头孔型,包括位于下部的直孔和位于上部的沉头,所述密封件下部位于直孔中,其突缘位于沉头中。
5、根据权利要求4所述的锂离子电池盖板,其特征是:所述突缘外沿直径大于沉头内径,并卡紧在沉头中。
6、一种锂离子电池壳,包括电池罐和封闭其开口的电池盖板,所述电池盖板包括盖体和密封件,所述盖体上设有注液孔,所述密封件至少部分位于注液孔中与注液孔紧配合,将其密封,其特征是:所述密封件具有突缘,延伸于注液孔外,限制密封件进入注液孔的深度。
7、根据权利要求6所述的锂离子电池壳,其特征是:所述密封件具有顶端封闭的中空形状,所述突缘为密封件敞口端向外延伸的挡边。
8、根据权利要求6所述的锂离子电池壳,其特征是:所述密封件为实心杆状,所述突缘为位于其顶端的帽盖。
9、一种锂离子电池,包括锂离子电池壳和封装在其中的电池电芯,所述电池壳包括电池罐和封闭其开口的电池盖板,所述电池盖板包括盖体和密封件,所述盖体上设有注液孔,所述密封件至少部分位于注液孔中与注液孔紧配合,将其密封,其特征是:所述密封件具有突缘,延伸于注液孔外,限制密封件进入注液孔的深度。
10、根据权利要求9所述的锂离子电池,其特征是:所述密封件具有顶端封闭的中空形状,所述突缘为密封件敞口端向外延伸的挡边。
CNU200520034561XU 2005-06-17 2005-06-17 一种锂离子电池盖板、电池壳及电池 Expired - Lifetime CN2840334Y (zh)

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CNU200520034561XU CN2840334Y (zh) 2005-06-17 2005-06-17 一种锂离子电池盖板、电池壳及电池
EP06741823.6A EP1892779A4 (en) 2005-06-17 2006-05-09 LITHIUM BATTERY RECOVERY PLATE ASSEMBLY, BATTERY HOUSING AND BATTERY USING THE SAME
KR1020087001100A KR20080041623A (ko) 2005-06-17 2006-05-09 리튬이온 배터리 캡, 배터리 케이스 및 배터리
PCT/CN2006/000930 WO2006133618A1 (en) 2005-06-17 2006-05-09 COVER PLATE ASSEMBLY FOR LITHIUM ION BATTERY, BATTERY CASE AND BATTERY USING the SAME
US11/922,352 US20090111016A1 (en) 2005-06-17 2006-05-09 Cover Plate Assembly for Lithium Ion Battery, Battery Case and Battery Using the Same
JP2008516107A JP2008544445A (ja) 2005-06-17 2006-05-09 リチウムイオン電池フラット、電池ハウジング及び電池

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US8389154B2 (en) 2005-09-02 2013-03-05 A123 Systems, Inc. Battery cell design and method of its construction

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