WO2006133618A1 - COVER PLATE ASSEMBLY FOR LITHIUM ION BATTERY, BATTERY CASE AND BATTERY USING the SAME - Google Patents

COVER PLATE ASSEMBLY FOR LITHIUM ION BATTERY, BATTERY CASE AND BATTERY USING the SAME Download PDF

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Publication number
WO2006133618A1
WO2006133618A1 PCT/CN2006/000930 CN2006000930W WO2006133618A1 WO 2006133618 A1 WO2006133618 A1 WO 2006133618A1 CN 2006000930 W CN2006000930 W CN 2006000930W WO 2006133618 A1 WO2006133618 A1 WO 2006133618A1
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WO
WIPO (PCT)
Prior art keywords
sealing member
lithium ion
injection hole
ion battery
flange
Prior art date
Application number
PCT/CN2006/000930
Other languages
English (en)
French (fr)
Inventor
Junfeng Zhao
Original Assignee
Shenzhen Bak Battery Co., Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Bak Battery Co., Ltd filed Critical Shenzhen Bak Battery Co., Ltd
Priority to EP06741823.6A priority Critical patent/EP1892779A4/en
Priority to JP2008516107A priority patent/JP2008544445A/ja
Priority to US11/922,352 priority patent/US20090111016A1/en
Publication of WO2006133618A1 publication Critical patent/WO2006133618A1/zh

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Classifications

    • 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
    • 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
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using lids
    • H01M50/645—Plugs
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to a lithium ion battery packaging technology, in particular to a lithium ion battery cover, a battery case and a battery. ⁇ Background technique ⁇
  • a lithium-ion battery is a high-capacity, high-power battery that is mainly used in small devices, especially mobile phones.
  • Lithium-ion batteries generally consist of a battery cover assembly, a battery can, an electrolyte, and a battery core wound from a positive, negative, and separator paper.
  • the packaging of the lithium ion battery generally adopts the steps of: firstly winding the wound battery core into the battery can; then soldering the positive and negative electrode connecting lead to the cover assembly; Sealed in the opening of the battery can by laser welding, thus forming a container with a battery core; then injecting the electrolyte into the interior of the container through the injection hole in the cover, and finally sealing the injection hole.
  • the sealing of the injection hole is achieved by flushing the steel ball into the injection hole and interference fit with the injection hole.
  • the steel ball embedded in the injection hole is relatively high, the depth of the steel ball is not easy to control when it is shallow, and it is easy to cause poor sealing and leakage; in addition, the steel ball is a solid rigid part and a liquid injection hole.
  • the interference fit which requires a relatively large pressure to seal the stamped steel ball, which may cause deformation of the battery case.
  • An object of the present invention is to provide a lithium ion battery cover, a battery case and a battery which are easy to control the depth of the sealing member into the liquid injection hole and effectively improve the sealing effect.
  • a lithium ion battery cover comprising a cover body and a sealing member, wherein the cover body is provided with a liquid injection hole, and the sealing member is at least partially located in the liquid injection hole and is tightly matched with the liquid injection hole to seal the
  • the seal has a flange extending beyond the injection hole to limit the depth of the seal into the injection hole.
  • a lithium ion battery case includes a battery can and a battery cover closing the opening thereof, the battery cover includes a cover body and a sealing member, and the cover body is provided with a liquid injection hole, and the sealing member is at least partially located The liquid hole is sealed by tightly fitting with the liquid injection hole, and the sealing member has a flange extending outside the liquid injection hole to limit the depth of the sealing member into the liquid injection hole.
  • a lithium ion battery includes a battery cover, the battery cover further includes a cover body and a sealing member, the cover body is provided with a liquid injection hole, and the sealing member is at least partially located in the liquid injection hole and is tightly coupled with the liquid injection hole Cooperating to seal it, said The seal has a flange extending beyond the injection hole to limit the depth of the seal into the injection hole.
  • the sealing member is a hollow structure having a closed lower end and an open upper end, and the flange on the peripheral edge of the upper end of the sealing member is a sealing ring extending integrally along the periphery. More preferably, the lower end of the seal is a spherical structure.
  • the flange is at least two projections disposed symmetrically or asymmetrically on the side of the seal and on the same level.
  • the seal is in the form of a solid rod, and the flange is a cap at the top end thereof.
  • the cap may be a curved or planar structure.
  • the liquid injection hole has a counterbore type, and includes a straight hole at a lower portion and a countersunk head at an upper portion, and a lower portion of the seal member is located in the straight hole, and a flange is located in the countersunk head.
  • the outer diameter of the flange is larger than the inner diameter of the countersunk head and is clamped in the countersunk head.
  • the beneficial technical effects of the present invention are as follows: 1) Since the flange is provided on the sealing member, the sealing member can be easily controlled to enter the liquid injection during the stamping and sealing. The depth of the hole completely avoids the long-term operational difficulty of using the steel ball seal (the diameter of the sealed steel ball is very small, about 1 mm), and there is a technical problem that the sealing is not in place or too deep to cause poor sealing. 2)
  • the sealing member with the hollow structure closed at the lower end has a lower requirement for the punching pressure than the solid sealing, and the hollow structure can fully exert the pressure generated by the interference fit, and is more favorable for the sealing member to be fully and uniformly pressed in the pressure. Inside the injection hole.
  • the lower end ⁇ uses a spherical structure to make the punching operation easier.
  • the use of a rod-type seal (cap or flat) with a cap has the advantages of easy manufacture and good sealing stability.
  • the liquid injection hole adopts a countersunk hole, and the depression of the countersunk portion makes the limit flange of the sealing member difficult to be interfered by other components in the subsequent process of battery assembly, thereby ensuring the reliability of the sealing.
  • the flange and the countersunk are tightly fitted to enable the double clamping function together with the sealing member located in the liquid injection hole to ensure the close fitting of the sealing member and the liquid injection hole, especially for the support portion.
  • the flange In the case of a hollow structure, the flange is clamped and the outward elastic force of the hollow portion is increased.
  • the elastic force is perpendicular to the sealing surface of the sealing member and the liquid injection hole, and the sealing ability of the sealing member can be effectively enhanced.
  • Figure 1 is a lithium ion battery cover.
  • Figure 2 is a perspective view of the seal.
  • Figure 3 is an axial cross-sectional view of the seal.
  • Figure 4 is an axial cross-sectional view of the liquid injection hole.
  • Figure 5 is an axial cross-sectional view of another seal.
  • Figure 6 is a schematic view of a square lithium ion battery case.
  • Embodiment 1 A lithium ion battery cover plate, comprising a cover body and a sealing member 1 in combination with Figs. 1 to 4, comprises a plate 2 and a cover surface 3. An injection hole 4 is provided on the plate 2 and the cover 3,
  • the sealing member 1 has the structure shown in Figs. 2 and 3, and is a hollow structure in which the lower end is closed by a spherical shape, and the open end integrally extends outward as a sealing ring 11 as a flange.
  • the outer diameter of the hollow portion 12 is a, and the outer diameter of the sealing ring 11 is b. '
  • the liquid injection hole 4 has the structure shown in Fig. 4 and has a counterbore type, and includes a straight hole 42 at the lower portion and a countersunk head 41 at the upper portion.
  • the inner diameter of the straight hole 42 is (:, the inner diameter of the countersunk head 41 is d.
  • the outer diameter a of the hollow portion 12 of the seal member 1 is larger than the inner diameter c of the straight hole 42 of the liquid injection hole 4; the outer diameter b of the seal ring 11 is larger than the inner diameter d of the countersunk head 41. Therefore, the seal 1 is clamped in the liquid injection hole 4 to seal it.
  • the main purpose of the liquid filling hole to set the countersunk head is to accommodate the flange of the sealing member, and therefore other shapes such as a countersunk head with an inclined surface may be employed as long as the liquid filling hole has a recess capable of accommodating the tight flange. That's it.
  • the flange is tightly fitted with the countersunk head, it can further enhance the sealing effect.
  • the main function of the flange on the seal is to act as a stop member during stamping, controlling the depth of the seal into the liquid injection hole, and therefore, there is no limitation on its shape and number.
  • the flange may be two or more protrusions, besides the seal ring, symmetrically or incorrectly disposed on the side of the seal, but must be at the same level. Up, in order to accurately limit the position.
  • the part of the seal located in the injection hole can also be of various shapes and configurations, as long as it can be closed, compared with the common solid steel ball, the hollow structure in this example can have smaller punching requirements. And better results.
  • the solid seal can also be of the dowel type structure, that is, having a cap-type flange on the solid rod body, as shown in FIG. If the flange is exposed outside the injection hole (the injection hole is not provided with a countersunk head), it is better to have a gentle transition with the surface of the cover, so as to avoid being affected by other components in the subsequent process. If the flange is located in Shen Preferably, the head is capable of tightly fitting to provide a better sealing effect, and such a structure is particularly preferred.
  • Embodiment 2 A lithium ion battery case, in combination with FIG. 6, includes a battery can 5 and a battery cover assembly that closes an opening thereof.
  • the battery cover assembly has the structure described in Embodiment 1.
  • a lithium ion battery includes a lithium ion battery case and a battery cell packaged therein.
  • the battery can has the structure described in the second embodiment.
  • the plate and the cover of the lithium ion battery cover of the present invention may also be designed in other shapes, such as a circular shape, and the corresponding lithium ion battery case and lithium ion battery may be designed into a cylindrical shape. Wait.
  • the above description of the preferred embodiments is provided for a better understanding of the invention, and is not to be construed as limiting the scope of the invention.

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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)

Description

一种锂离子电池盖板、 电池壳及电池
【技术领域】
本发明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】
本发明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， 本发明所釆取的技术方案是：
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并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。
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并与注液孔 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。
一种锂离子电池， 包括电池盖板， 电池盖板进一步包括盖体和密封件， 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并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， 所述密封件为下端封闭、 上端敞口的中空结构， 位于密封件上端敞口 周沿上的突缘是沿着周沿向外整体延伸的密封圈。 更优选的是， 所述密封件的下端为 球面形结构。
优选的是， 所述突缘是至少两个凸起， 对称或不对称地设置在密封件的侧面， 且 处于同一水平面上。
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。 所述帽盖可 以是弧面形或平面形结构。
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。
釆用上述技术方案，结合下面将要详述的实施例，本发明有益的技术效果在于： 1 ) 由于在密封件上设置突缘， 使得在冲压密封时能够很容易地控制了密封件进入注液孔 的深度， 彻底避免了采用钢珠密封长期存在的操作困难 （密封钢珠直径很小， 大约为 lmm左右）、 存在冲压不到位或过深而引起密封不良的技术问题。 2 )采用下端封闭的 中空结构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。 特别是下端釆 用球面形结构， 使冲压操作更容易。 3 )采用带有帽盖的杆型密封件（平头或弧面形）， 则具有制造容易，且密封稳定性好等优点。 4)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。 5 )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发明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， 为下端釆用球面形封闭的中空结构， 其敞 口端向外整体延伸出作为突缘的密封圈 11。 其中空部分 12的外径为 a， 密封圈 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(：， 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; 密封圈 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， 对其形状和数量没有限制。 根据本发明， 本领域的技术人员可以理解， 突缘除了是密封圈外， 也可以是两个或多个凸起， 对称或不对^地设置在密封件的侧 · 面， 但必须处于同一水平面上， 以便准确地进行限位。
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嫘钉型结构， 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

权利要求 、 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并与注液孔紧配合密封， 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。 、 根据权利要求 1所述的锂离子电池盖板，其特征是：所述密封件为下端封闭的中空 结构。 、 根据权利要求 2所述的锂离子电池盖板,其特征是：所述密封件的上端为敞口结构， 位于密封件上端敞口周沿上的突缘是沿着周沿向外整体延伸的密封圈。 、 根据权利要求 2所述的锂离子电池盖板，其特征是：所述密封件的下端为球面形结 构。 、 根据权利要求 1所述的锂离子电池盖板， 其特征是： 所述突缘是至少两个凸起， 对 称或不对称地设置在密封件的侧面， 且处于同一水平面上。 、 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。 、 根据权利要求 6所述的锂离子电池盖板，其特征是：所述帽盖是弧面形或平面形结 构。 、 根据权利要求 1~7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。 、 根据权利要求 8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。0、 一种锂离子电池壳， 包括电池罐和封闭其开口的电池盖板， 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并与注液孔 紧配合密封， 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。
1、 根据权利要求 10所述的锂离子电池壳， 其特征是： 所述密封件为下端封闭、 上端为敞口的中空结构，位于密封件上端敞口周沿上的突缘是沿着周沿向外整体延 伸的密封圈。
、 根据权利要求 11所述的锂离子电池壳，其特征是： 所述突缘是至少两个凸起， 对称或不对称地设置在密封件的侧面， 且处于同一水平面上。
、 根据权利要求 10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。
、 根据权利要求 13所述的锂离子电池壳， 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。
、 一种锂离子电池， 包括电池盖板， 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并与注液孔紧配合密封， 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。
、 根据权利要求 15所述的锂离子电池， 其特征是： 所述密封件为下端封闭、 上 端为敞口的中空结构，位于密封件上端敞口周沿上的突缘是沿着周沿向外整体延伸 的密封圈。
、 根据权利要求 16所述的锂离子电池， 其特征是： 所述密封件的下端为球面形 结构。
、 根据权利要求 15所述的锂离子电池， 其特征是： 所述突缘是至少两个凸起， 对称或不对称地设置在密封件的侧面， 且处于同一水平面上。
、 根据权利要求 15所述的锂离子电池， 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。
、 根据权利要求 19所述的锂离子电池， 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。
PCT/CN2006/000930 2005-06-17 2006-05-09 COVER PLATE ASSEMBLY FOR LITHIUM ION BATTERY, BATTERY CASE AND BATTERY USING the SAME WO2006133618A1 (en)

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