WO2022116475A1 - 一种顶盖组件以及二次电池 - Google Patents

一种顶盖组件以及二次电池 Download PDF

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Publication number
WO2022116475A1
WO2022116475A1 PCT/CN2021/091771 CN2021091771W WO2022116475A1 WO 2022116475 A1 WO2022116475 A1 WO 2022116475A1 CN 2021091771 W CN2021091771 W CN 2021091771W WO 2022116475 A1 WO2022116475 A1 WO 2022116475A1
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WO
WIPO (PCT)
Prior art keywords
top cover
cover assembly
annular
pole
fixing member
Prior art date
Application number
PCT/CN2021/091771
Other languages
English (en)
French (fr)
Inventor
王有生
远浩
李华
夏春文
Original Assignee
常州瑞德丰精密技术有限公司
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 常州瑞德丰精密技术有限公司 filed Critical 常州瑞德丰精密技术有限公司
Publication of WO2022116475A1 publication Critical patent/WO2022116475A1/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
    • 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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the cells

Definitions

  • the present application relates to the technical field of energy storage devices, and in particular, to a top cover assembly and a secondary battery.
  • the top cover assembly of the secondary battery is an important part of the secondary battery. During assembly, since the pole post is fixed on the top cover by the riveting process, the problems caused by the poor welding caused by the welding process can be well avoided. Therefore, It is widely used in secondary battery assembly process.
  • Embodiments of the present application provide a top cover assembly and a secondary battery to solve the problem of low assembly efficiency of the existing top cover assembly.
  • the application provides a top cover assembly, comprising:
  • the cover plate is provided with a pole hole
  • annular convex part is arranged around the outer edge of the pole hole, and is integrally formed with the cover plate;
  • the pole is located on the inner side of the annular convex portion
  • annular fixing piece the annular fixing piece is provided with a first accommodating groove that matches the annular convex portion, the inner edge of the annular fixing piece abuts the edge of the pole post, and the annular convex portion is placed in the first accommodating groove.
  • the first accommodating groove is provided with a snap portion
  • the annular convex portion is provided with a snap portion
  • the snap portion is adapted and connected to the snap portion .
  • the engaging portion includes at least one of a through hole or a groove.
  • the engaging portion when the engaging portion is a groove, the engaging portion is a regular trapezoidal groove.
  • the top cover assembly further includes a sealing ring, the sealing ring is provided on the inner side of the annular convex portion, and the pole post abuts on the sealing ring.
  • the outer edge of the pole hole is provided with a holding part, and one end of the sealing ring is provided with a hook part, and the hook part is suitable for the holding part The other end of the sealing ring is placed in the pole hole.
  • a stepped portion is provided on the side of the pole, and a second accommodating groove is provided on the inner side of the annular fixing member, and the second accommodating groove is adapted to the stepped portion. connect.
  • one of the stepped portion and the annular fixing member is provided with a limiting portion, and the other is provided with a accommodating portion, and the limiting portion is suitable for the accommodating portion with connection.
  • the vertical projection of the stepped portion is located outside the vertical projection of the sealing ring.
  • the annular fixing part is an injection molded part, and/or the pole post is a metal part, the cover plate is a metal part, and the sealing ring is made of rubber.
  • a third accommodating groove is provided on the cover plate, the pole hole is located on the bottom wall of the third accommodating groove, and the annular convex portion is surrounded by the third accommodating groove.
  • the annular fixing member is partially placed in the third accommodating groove.
  • the present application also provides a secondary battery, the secondary battery includes the above-mentioned top cover assembly.
  • a top cover assembly and a secondary battery provided by the present application, by integrally molding an annular convex portion and a cover plate, assembly parts can be reduced, assembly efficiency can be improved, and the inner edge of the annular fixing member can be abutted against the pole On the edge of the column, the annular convex portion is placed in the first accommodating groove, so that the annular fixing member can be quickly installed on the cover plate, and the edge of the pole column is pressed and fixed, so as to improve the assembly efficiency.
  • FIG. 1 is a schematic structural diagram of a top cover assembly provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an exploded structure of a top cover assembly according to an embodiment of the present application.
  • FIG. 3 is a schematic cross-sectional structural diagram of a top cover assembly provided by an embodiment of the present application.
  • FIG. 4 is a schematic view of the enlarged structure of the part A of FIG. 3 .
  • FIG. 5 is a schematic structural diagram of an embodiment of the cover plate and the annular convex portion of FIG. 1 .
  • FIG. 6 is a schematic structural diagram of another embodiment of the cover plate and the annular convex portion of FIG. 1 .
  • FIG. 7 is a schematic diagram of an exploded structure of the secondary battery provided by the embodiment of the present application.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more of said features. In the description of the present application, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction of two elements relation.
  • a first feature "on” or “under” a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.
  • an embodiment of the present application provides a top cover assembly, which includes a cover plate 10 , an annular convex portion 20 , a pole post 30 , and an annular fixing member 40 .
  • the cover plate 10 is provided with a pole hole 11 ; the annular convex portion 20 is formed around the outer edge of the pole hole 11 and is integrally formed with the cover plate 10 .
  • the pole post 30 is located on the inner side of the annular protrusion 20;
  • the annular fixing member 40 is provided with a first accommodating groove 41 adapted to the annular convex portion 20 .
  • the inner edge of the annular fixing member 40 abuts against the edge of the pole post 30 .
  • 20 is placed in the first accommodating groove 41 .
  • the pole 30 is a metal part, and the cover plate 10 can be a metal part.
  • annular convex portion 20 by integrally molding the annular convex portion 20 and the cover plate 10, assembly parts can be reduced, and assembly efficiency can be improved.
  • the annular protrusion 20 is placed in the first accommodating groove 41, so that the annular fixing member 40 can be quickly installed on the cover plate 10, and the edge of the pole 30 can be pressed and fixed, so as to improve the assembly efficiency.
  • the annular convex portion 20 may be a clearance fit or transition fit with the first accommodating groove 41 .
  • the annular fixing member 40 can be an injection-molded part, so that the annular fixing member 40 can be quickly assembled to the cover plate 10 without the need to process the annular fixing member 40 separately, which can reduce the processing cost, improve the processing efficiency, and enhance the annular fixing member.
  • the tightness of the connection between the member 40 and the cover plate 10 , the annular convex portion 20 and the pole post 30 is ensured.
  • a part of the plastic will fill the engaging portion 21 of the annular convex portion 20 , and the plastic entering the engaging portion 21 will form the engaging portion 42 after solidification.
  • both the annular convex portion 20 and the annular fixing member 40 form a whole, the connection strength of the annular convex portion 20 and the annular fixing member 40 is high, and the connection stability is good, thereby enhancing the stability of the pole 30 on the cover plate 10 .
  • the first accommodating groove 41 is provided with a snap portion 42
  • the annular convex portion 20 is provided with a snap portion 21
  • the snap portion 42 is adapted to the snap portion 21 . connection, so that the annular fixing member 40 can be connected with the annular convex portion 20 more closely.
  • the engaging portion 21 may be a through hole or a groove. As shown in FIG. 2 , the through hole 211 penetrates the side wall of the annular protrusion 20 .
  • a part of the plastic can fill the through hole 211 through injection molding, so that the annular protrusion 20 and the annular fixing member 40 form a single It is integral, and the through hole can play a role of well engaging the annular fixing member 40 , thereby further enhancing the stability of the pole 30 on the cover plate 10 .
  • the engaging portion 21 may be a groove 212 , and the groove may be provided at the end of the annular convex portion 20 , as shown in FIG. 5 .
  • the opening of the groove faces the bottom of the annular fixing member 40
  • the setting of the wall; the groove 212 can also be a "U"-shaped groove, or it can be a groove with a narrow upper and a lower width such as a normal trapezoidal groove, because the normal trapezoidal groove is a groove structure with a narrow upper and a lower width, It can better prevent the annular fixing member 40 from falling off when it is fixed on the annular convex portion 20 , and can better increase the stability of the annular fixing member 40 . Further, the opening depth of the groove can be set as required.
  • the adhesion between the annular fixing member 40 and the engaging portion 21 is greater, thereby increasing the stability of the annular fixing member 40.
  • the grooves can divide the engaging portion 21 into a plurality of separate parts.
  • the groove 212 can also be provided on the side wall of the annular convex portion 20, as shown in FIG. 6, wherein, the groove can be provided on the outer side wall or the inner side wall of the annular convex portion 20.
  • the opening of the groove is disposed toward the outer side wall of the annular convex portion 20 , or the opening of the groove is disposed toward the inner side wall of the annular convex portion 20 .
  • the number of the engaging portions 21 can be provided in multiples, so that the annular fixing member 40 can be connected with the annular convex portion 20 more closely. For example, two or four may be used.
  • the multiple engaging portions 21 are at least one of through holes or grooves.
  • the multiple engaging portions 21 may be all through holes or all grooves , or, the plurality of engaging parts may also be composed of two through holes and two grooves, etc., which are not specifically limited here.
  • the engaging portion 42 may be a protrusion adapted to the engaging portion. Since the engaging portion 21 can have various structures and shapes, the shape of the engaging portion is not limited herein.
  • the top cover assembly further includes a sealing ring 50 , the sealing ring 50 is disposed on the inner side of the annular protrusion 20 , and the pole post 30 abuts on the sealing ring 50 .
  • the sealing ring 50 can be made of rubber material, and the sealing ring 50 can enhance the sealing performance between the pole 30 and the cover plate 10 , can be waterproof, and prolong its service life.
  • the outer edge of the pole hole 11 is provided with a retaining portion 111
  • one end of the sealing ring 50 is provided with a hook portion 51
  • the hook portion 51 is aligned with the retaining portion 111 .
  • the other end of the sealing ring 50 is placed in the pole hole 11 .
  • the retaining portion 111 and the hook portion 51 can be tightly coupled with each other, so as to further enhance the sealing performance and prolong the service life of the pole 30 .
  • the side surface of the pole 30 is provided with a stepped portion 31
  • the inner side of the annular fixing member 40 is provided with a second accommodating groove 43
  • the second accommodating groove 43 is adapted to the stepped portion 31 . with connection.
  • the annular fixing member 40 can be closely contacted with the edge of the pole 30 , so that the pole 30 is installed more stably and is not easy to fall off.
  • one of the stepped portion 31 and the annular fixing member 40 is provided with a limiting portion (not shown), and the other is provided with a accommodating portion 311 .
  • Part 311 is adapted to connect.
  • the limiting portion is a protrusion, and the accommodating portion 311 can be a hole or a notch.
  • the limiting portion is placed in the accommodating portion 311 to prevent the torsional force of the pole 30 from increasing and make the pole 30 more stable.
  • the vertical projection of the stepped portion 31 is located outside the vertical projection of the sealing ring 50 . In this way, a gap is formed between the stepped portion 31 and the cover plate 10 , so that the edge of the pole 30 can be completely placed in the second accommodating groove 43 of the annular fixing member 40 , so that the annular fixing member 40 can more tightly fix the pole 30 .
  • the cover plate 10 is provided with a third accommodating groove 12
  • the pole hole 11 is located on the bottom wall of the third accommodating groove 12
  • the annular protrusion 20 surrounds At the outer edge of the third accommodating groove 12 , the annular fixing member 40 is partially placed in the third accommodating groove 12 . Therefore, the annular protrusion 20 and the third accommodating groove 12 are convenient for stamping and forming, and the part of the pole 30 protruding from the cover plate 10 is made smaller, so that the overall structure is more compact.
  • the present application also proposes a secondary battery 200.
  • the secondary battery 200 includes a top cover assembly 100, a casing 200 and a battery cell (not shown).
  • the top cover assembly 100 covers the On the casing, the battery cells are arranged in the casing 200 .
  • the top cover assembly is the above-mentioned top cover assembly 100, and the above-mentioned top cover assembly 100 is used. Therefore, the secondary battery 200 also has all the beneficial effects brought by the above-mentioned top cover assembly 100, which will not be repeated here.
  • the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.
  • top cover assembly and the secondary battery provided by the embodiments of the present application are described in detail above.
  • the principles and implementations of the present application are described with specific examples in this paper.
  • the descriptions of the above embodiments are only used to help understanding The technical solution of the present application and its core idea; those of ordinary skill in the art should understand that it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements , does not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种顶盖组件以及二次电池，所述顶盖组件包括：盖板，所述盖板设有极柱孔；环形凸部，所述环形凸部围设于所述极柱孔的外侧边沿，与所述盖板一体成型；极柱，所述极柱位于所述环形凸部的内侧；环形固定件，所述环形固定件设有与所述环形凸部相适配的第一容纳槽，所述环形固定件的内侧边沿抵接于所述极柱的边沿，所述环形凸部置于所述第一容纳槽内。本申请通过将环形凸部与盖板一体成型可减少组装零件，提高装配效率，并通过将所述环形固定件的内侧边沿抵接于所述极柱的边沿，所述环形凸部置于所述第一容纳槽内，使环形固定件可快速安装在盖板上，并将极柱的边沿压紧固定，以提高装配效率。

Description

一种顶盖组件以及二次电池 技术领域
本申请涉及储能器件技术领域，尤其涉及一种顶盖组件以及二次电池。
 背景技术
随着越来越多的电动工具及新能源交通工具的驱动电源向着高容量、高安全性的方向发展，二次电池以其高容量等优良特性，广泛地运用在电动工具及新能源交通工具中。
二次电池的顶盖组件作为二次电池的重要组成部分，装配时，由于采用铆压工艺将极柱固定在顶盖上可以很好地避免焊接工艺带来的焊接不良带来的问题，因此在二次电池装配工艺中被广泛采用。
 技术问题
然而，采用铆压工艺的电池顶盖时，通常需要在极柱上设置内环体、外环体等结构，结构复杂，而且铆压时也需要定位，因此装配工艺复杂，导致装配效率不高。
 技术解决方案
本申请实施例提供一种顶盖组件以及二次电池，以解决现有顶盖组件装配效率不高的问题。
一方面，本申请提供一种顶盖组件，包括：
盖板，所述盖板设有极柱孔；
环形凸部，所述环形凸部围设于所述极柱孔的外侧边沿，与所述盖板一体成型；
极柱，所述极柱位于所述环形凸部的内侧；
环形固定件，所述环形固定件设有与所述环形凸部相适配的第一容纳槽，所述环形固定件的内侧边沿抵接于所述极柱的边沿，所述环形凸部置于所述第一容纳槽内。
在本申请一种可能的实现方式中，所述第一容纳槽内设有卡接部，所述环形凸部设有卡合部，所述卡接部与所述卡合部相适配连接。
在本申请一种可能的实现方式中，所述卡合部包括通孔或凹槽中的至少一种。
在本申请一种可能的实现方式中，当所述卡合部为凹槽时，所述卡合部为正梯形凹槽。
在本申请一种可能的实现方式中，所述顶盖组件还包括密封圈，所述密封圈设于所述环形凸部的内侧，所述极柱抵接于所述密封圈上。
在本申请一种可能的实现方式中，所述极柱孔的外侧边沿设有卡持部，所述密封圈的一端设有卡勾部，所述卡勾部与所述卡持部相适配连接，所述密封圈的另一端置于所述极柱孔内。
在本申请一种可能的实现方式中，所述极柱的侧面设有阶梯部，所述环形固定件的内侧设有第二容纳槽，所述第二容纳槽与所述阶梯部相适配连接。
在本申请一种可能的实现方式中，所述阶梯部和所述环形固定件其中之一设有限位部，其中之另一设有容纳部，所述限位部与所述容纳部相适配连接。
在本申请一种可能的实现方式中，所述阶梯部的竖直投影位于密封圈的竖直投影的外侧。
在本申请一种可能的实现方式中，所述环形固定件为注塑件，和/或所述极柱为金属件，所述盖板为金属件，所述密封圈为橡胶材质。
在本申请一种可能的实现方式中，所述盖板上设有第三容纳槽，所述极柱孔位于第三容纳槽的底壁，所述环形凸部围设于所述第三容纳槽的外侧边沿，所述环形固定件部分置于所述第三容纳槽内。
另一方面，本申请还一种二次电池，所述二次电池包括上述所述的顶盖组件。
 有益效果
本申请    提供的一种顶盖组件以及二次电池，通过将环形凸部与盖板一体成型可减少组装零件，提高装配效率，并通过将所述环形固定件的内侧边沿抵接于所述极柱的边沿，所述环形凸部置于所述第一容纳槽内，使环形固定件可快速安装在盖板上，并将极柱的边沿压紧固定，以提高装配效率。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本申请实施例提供的顶盖组件的结构示意图。
图2为本申请实施例提供的顶盖组件分解结构示意图。
图3为本申请实施例提供的顶盖组件的剖面结构示意图。
图4为图3的A处放大结构示意图。
图5为图1的盖板与环形凸部一实施例的结构示意图。
图6为图1的盖板与环形凸部又一实施例的结构示意图。
[根据细则26改正23.06.2021]　
图7为本申请实施例提供的二次电池的分解结构示意图。
 本发明的最佳实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
请参阅图1至图3所示，在本申请实施例提供一种顶盖组件，包括盖板10、环形凸部20、极柱30、环形固定件40。
所述盖板10设有极柱孔11；所述环形凸部20围设于所述极柱孔11的外侧边沿，与所述盖板10一体成型。所述极柱30位于所述环形凸部20的内侧；
所述环形固定件40设有与所述环形凸部20相适配的第一容纳槽41，所述环形固定件40的内侧边沿抵接于所述极柱30的边沿，所述环形凸部20置于所述第一容纳槽41内。其中的所述极柱30为金属件，所述盖板10可以是金属件。
本申请实施例通过将环形凸部20与盖板10一体成型可减少组装零件，提高装配效率，并通过将所述环形固定件40的内侧边沿抵接于所述极柱30的边沿，所述环形凸部20置于所述第一容纳槽41内，使环形固定件40可快速安装在盖板10上，并将极柱30的边沿压紧固定，以提高装配效率。
其中，环形凸部20可以与第一容纳槽41为间隙配合或过渡配合。进一步地，所述环形固定件40可以是注塑件，以便于环形固定件40进行快速组装到盖板10上，不用单独加工环形固定件40，可降低加工成本，提高加工效率，并且增强环形固定件40与盖板10、环形凸部20、极柱30之间连接的密封性。注塑过程中，一部分塑胶会填充环形凸部20的卡合部21内，进入卡合部21的塑胶在凝固后会形成卡接部42。这样，环形凸部20和环形固定件40两者形成一个整体，环形凸部20和环形固定件40两者连接强度大，连接稳定性好，进而增强极柱30在盖板10上的稳定性。
在一些实施例中，所述第一容纳槽41内设有卡接部42，所述环形凸部20设有卡合部21，所述卡接部42与所述卡合部21相适配连接，以此使环形固定件40可与环形凸部20连接更加紧密。具体地，所述卡合部21可以为通孔、凹槽。如图2所示，所述通孔211贯穿环形凸部20的侧壁，例如，通过注塑使得一部分塑胶会填充所述通孔211，以使环形凸部20和环形固定件40两者形成一个整体，且通孔可以起到很好地卡合所述环形固定件40的作用，从而进一步增强极柱30在盖板10上的稳定性。
所述卡合部21可以为凹槽212，所述凹槽可以设于环形凸部20的端部，如图5所示，具体地，所述凹槽的开口朝向所述环形固定件40底壁的设置；所述凹槽212还可以为“U”型凹槽，也可以为正梯形凹槽等上窄下宽的凹槽，由于正梯形凹槽为上窄下宽的凹槽结构，可以更好地使得环形固定件40固定于所述环形凸部20上时不易掉落，可以更好地增加环形固定件40的稳固性。进一步地，所述凹槽的开口深度可以有根据需要设置，所述凹槽的开口深度越深，所述环形固定件40与所述卡合部21的接触面积越大，所述环形固定件40通过注塑形成时，所述环形固定件40与所述卡合部21之间的附着力越大，从而增加环形固定件40的稳固程度，当所述凹槽的深度与环形凸部20的高度相同时，所述凹槽可以将卡合部21划分为多个单独的部分。
所述凹槽212还可以设于环形凸部20的侧壁，如图6所示，其中，所述凹槽可以设置于所述环形凸部20的外侧壁或内侧壁，具体地，所述凹槽的开口朝向环形凸部20的外侧壁设置，或者，所述凹槽的开口朝向环形凸部20的内侧壁设置。
所述卡合部21的数量可以设置有多个，以此使环形固定件40可与环形凸部20连接更加紧密。例如可以为2个或4个等。当卡合部21有多个时，多个所述卡合部21为通孔或凹槽中的至少一种，示例性地，多个卡合部21可以均为通孔或均为凹槽，或者，多个卡合部也可以是由2个通孔和2个凹槽组成等等，在此不作具体限制。对应地，卡接部42可为与卡合部适配的凸起，由于卡合部21的结构和形状可以有多种，因此卡合部的形状在此不作限定。
在一些实施例中，所述顶盖组件还包括密封圈50，所述密封圈50设于所述环形凸部20的内侧，所述极柱30抵接于所述密封圈50上。所述密封圈50可以是橡胶材质，通过密封圈50可增强极柱30与盖板10之间的密封性，可防水，延长其使用寿命。
在一些实施例中，所述极柱孔11的外侧边沿设有卡持部111，所述密封圈50的一端设有卡勾部51，所述卡勾部51与所述卡持部111相适配连接，所述密封圈50的另一端置于所述极柱孔11内。其中的卡持部111和卡勾部51可紧密相互扣合，以此进一步增强其密封性，延长极柱30的使用寿命。
在一些实施例中，所述极柱30的侧面设有阶梯部31，所述环形固定件40的内侧设有第二容纳槽43，所述第二容纳槽43与所述阶梯部31相适配连接。通过阶梯部31使环形固定件40可紧密抵接于极柱30的边沿，使极柱30安装更加稳固，不易脱落。
在一些实施例中，所述阶梯部31和所述环形固定件40其中之一设有限位部（未图示），其中之另一设有容纳部311，所述限位部与所述容纳部311相适配连接。其中的限位部为凸起，其中的容纳部311可为孔或缺口，通过限位部置于容纳部311内，可防止增加极柱30的扭力，使极柱30更加稳固。
在一些实施例中，所述阶梯部31的竖直投影位于密封圈50的竖直投影的外侧。以此使阶梯部31与盖板10之间形成间隙，便于极柱30的边沿完全置于环形固定件40的第二容纳槽43内，使环形固定件40更加紧密固定极柱30。
在一些实施例中，如图4所示，所述盖板10上设有第三容纳槽12，所述极柱孔11位于第三容纳槽12的底壁，所述环形凸部20围设于所述第三容纳槽12的外侧边沿，所述环形固定件40部分置于所述第三容纳槽12内。以此环形凸部20和第三容纳槽12便于冲压成型，并且使极柱30凸出盖板10的部分更小，以使整体结构更加紧凑。
本申请还提出一种二次电池200，如图7所示，所述二次电池200包括顶盖组件100、壳体200和电芯（图未示），所述顶盖组件100盖合于所述壳体上，所述电芯设置于所述壳体200内。所述顶盖组件为上述的顶盖组件100，采用了上述顶盖组件100，因此该二次电池200还具有上述顶盖组件100带来的全部有益效果，在此不再赘述。在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种顶盖组件以及二次电池进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (11)

  1. 一种顶盖组件，其特征在于，包括：
    盖板，所述盖板设有极柱孔；
    环形凸部，所述环形凸部围设于所述极柱孔的外侧边沿，与所述盖板一体成型；
    极柱，所述极柱位于所述环形凸部的内侧；
    环形固定件，所述环形固定件设有与所述环形凸部相适配的第一容纳槽，所述环形固定件的内侧边沿抵接于所述极柱的边沿，所述环形凸部置于所述第一容纳槽内。
  2. 根据权利要求1所述的顶盖组件，其特征在于，所述第一容纳槽内设有卡接部，所述环形凸部设有卡合部，所述卡接部与所述卡合部相适配连接。
  3. 根据权利要求2所述的顶盖组件，其特征在于，所述卡合部包括通孔或凹槽中的至少一种。
  4. 根据权利要求3所述的顶盖组件，其特征在于，当所述卡合部为凹槽时，所述卡合部为正梯形凹槽。
  5. 根据权利要求1所述的顶盖组件，其特征在于，所述顶盖组件还包括密封圈，所述密封圈设于所述环形凸部的内侧，所述极柱抵接于所述密封圈上。
  6. 根据权利要求5所述的顶盖组件，其特征在于，所述极柱孔的外侧边沿设有卡持部，所述密封圈的一端设有卡勾部，所述卡勾部与所述卡持部相适配连接，所述密封圈的另一端置于所述极柱孔内。
  7. 根据权利要求6所述的顶盖组件，其特征在于，所述极柱的侧面设有阶梯部，所述环形固定件的内侧设有第二容纳槽，所述第二容纳槽与所述阶梯部相适配连接。
  8. 根据权利要求7所述的顶盖组件，其特征在于，所述阶梯部和所述环形固定件其中之一设有限位部，其中之另一设有容纳部，所述限位部与所述容纳部相适配连接。
  9. 根据权利要求7所述的顶盖组件，其特征在于，所述阶梯部的竖直投影位于密封圈的竖直投影的外侧。
  10. 根据权利要求1-9任一项所述的顶盖组件，其特征在于，所述盖板上设有第三容纳槽，所述极柱孔位于所述第三容纳槽的底壁，所述环形凸部围设于所述第三容纳槽的外侧边沿，所述环形固定件部分置于所述第三容纳槽内。
  11. 一种二次电池，其特征在于，所述二次电池包括如权利要求1-10任一项所述的顶盖组件。
PCT/CN2021/091771 2020-12-04 2021-04-30 一种顶盖组件以及二次电池 WO2022116475A1 (zh)

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