WO2021208128A1 - Lithium ion battery - Google Patents

Lithium ion battery Download PDF

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Publication number
WO2021208128A1
WO2021208128A1 PCT/CN2020/086347 CN2020086347W WO2021208128A1 WO 2021208128 A1 WO2021208128 A1 WO 2021208128A1 CN 2020086347 W CN2020086347 W CN 2020086347W WO 2021208128 A1 WO2021208128 A1 WO 2021208128A1
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WO
WIPO (PCT)
Prior art keywords
negative
positive
electrode sheet
housing
positive electrode
Prior art date
Application number
PCT/CN2020/086347
Other languages
French (fr)
Chinese (zh)
Inventor
陈俊涛
左国焰
黄林海
郭建伟
Original Assignee
广东国光电子有限公司
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Application filed by 广东国光电子有限公司 filed Critical 广东国光电子有限公司
Publication of WO2021208128A1 publication Critical patent/WO2021208128A1/en

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    • 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 of a single cell or a single battery
    • H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
    • H01M50/109—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure of button or coin shape
    • 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 of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with 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
    • H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • 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 of a single cell or a single battery
    • H01M50/183—Sealing members
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • 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

Definitions

  • This application relates to the technical field of lithium ion batteries, for example, to a lithium ion battery.
  • buttons have become more and more widely used, and most of them are electronic devices close to sensitive parts of the body.
  • Chinese patent CN201080007121.9 discloses a button battery and a method for producing the button battery.
  • the button battery includes a first metal cup, a second metal cup and an insulating seal.
  • the first metal cup is inserted into the second metal cup and is insulated
  • a part of the seal is wrapped around the opening of the first metal cup, and the other part is arranged between the outer wall of the first metal cup and the inner wall of the second metal cup.
  • Electrode sheets are arranged inside the first metal cup.
  • This button battery has a complicated structure and high manufacturing cost.
  • the application provides a lithium ion battery, which has a relatively simple structure and high sealing performance.
  • An embodiment provides a lithium ion battery, including:
  • a housing assembly which includes a housing, a cover plate and a sealing element.
  • the opening of the housing is provided with a brim outwards, the brim is provided with a receiving groove with an opening facing inward, and the sealing element is wrapped around the On the periphery of the cover plate, the outer side of the sealing member presses against the inner wall of the containing groove;
  • the battery cell assembly is arranged in the housing, the battery assembly is provided with a positive electrode ear and a negative electrode ear, the positive electrode ear is connected to the cover plate, and the negative electrode ear is connected to the housing.
  • the battery cell assembly includes a positive electrode sheet and a negative electrode sheet that are stacked, a separator is provided on both sides of the positive electrode sheet or the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are wound into a disc
  • the battery cell assembly is formed in a shape, the positive electrode tab is led out from the positive electrode sheet, and the negative electrode tab is led out from the negative electrode sheet.
  • the battery cell assembly includes a plurality of positive electrode sheets and negative electrode sheets arranged in a cross stack, one negative electrode sheet is arranged between two adjacent positive electrode sheets, and a negative electrode sheet is arranged between two adjacent negative electrode sheets.
  • a positive electrode sheet is provided, a separator is provided between the positive electrode sheet and the negative electrode sheet, and the separator is provided on the outside of the pole pieces on the upper and lower surfaces of the cell assembly;
  • the material of the seal is plastic.
  • the present application provides a lithium ion battery.
  • the casing assembly includes a casing, a cover plate and a sealing element.
  • the structure of the cover plate and the sealing element is simple, which simplifies the structure and process of the lithium ion battery; and the outer side of the sealing element is pressed against the containing groove
  • the inner wall of the visor that is, the inner side of the brim, makes the sealing member squeeze between the edge of the cover plate and the brim, so that the sealing performance of the entire housing assembly is relatively high.
  • FIG. 1 is a schematic diagram of the structure of a lithium ion battery provided by the present application.
  • the battery cell assembly is in the shape of a disc
  • Fig. 3 is a cross-sectional view of the lithium ion battery provided by the present application (the positive electrode sheet and the negative electrode sheet are stacked).
  • housing assembly 11, housing; 111, brim; 1111, containing groove; 12, cover plate; 13, seal;
  • the "on" or “under” of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them.
  • the "above”, “above” and “above” of the first feature on the second feature include the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature.
  • the “below”, “below” and “below” of the second feature of the first feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
  • this embodiment discloses a lithium ion battery, which includes a casing assembly 1 and a battery cell assembly 2.
  • the housing assembly 1 includes a housing 11, a cover plate 12, and a sealing member 13.
  • the housing 11 and the cover plate 12 are made of stainless steel.
  • the housing 11 has a cup shape, and the cover 12 has a disc shape.
  • a brim 111 is protruding outward from the opening of the housing 11, and a receiving groove 1111 with an inward opening is provided on the brim 111.
  • the sealing member 13 covers the periphery of the cover plate 12, and the outer side of the sealing member 13 is pressed against the receiving groove 1111 The inner wall.
  • the sealing member 13 has a circular ring shape, a groove is provided on the inner wall, and the sealing member 13 is sleeved on the cover plate 12 so that the periphery of the cover plate 12 extends into the groove. Moreover, there is an interference fit between the sealing member 13 and the cover plate 12.
  • a sealant is coated on the periphery of the cover plate 12 and/or in the groove of the sealing member 13.
  • the outer side surface and the upper and lower surfaces of the sealing member 13 close to the outer side surfaces are pressed against the inner wall of the containing groove 1111.
  • a sealant is coated on the outer periphery of the sealing member 13 and/or the inner wall of the containing groove 1111.
  • the material of the sealing member 13 is a plastic resistant to corrosion by the electrolyte, and in this embodiment, it is made of PP.
  • the packaging process of the cover plate 12 the housing 11 is initially processed into a stepped shape, the outer diameter of the opening is relatively large, and the brim 111 is a large aperture section; after the battery cell assembly 2 in the housing 11 is installed, the assembled cover The plate 12 and the sealing element 13 are placed in the large aperture section; then the edge of the opening of the shell 11 is rolled to bend it inwardly by 45°, and the cover plate 12 and the sealing element 13 are preliminarily fixed; The bent part continues to be rolled down to make it parallel to the bottom surface of the housing 11, so that a receiving groove 1111 is formed at the brim 111, and the cover plate 12 and the sealing member 13 are assembled in the receiving groove 1111 of the housing 11 .
  • the housing assembly 1 of the lithium ion battery includes a housing 11, a cover plate 12, and a sealing member 13.
  • the cover plate 12 and the sealing member 13 have a simple structure, which simplifies the structure and process of the lithium ion battery; and the outer side of the sealing member 13 is against Pressing on the inner wall of the containing groove 1111, that is, the inner side of the brim 111, causes the sealing member 13 to be squeezed between the edge of the cover plate 12 and the brim 111, so that the sealing performance of the entire housing assembly 1 is relatively high.
  • the battery cell assembly 2 is arranged in the housing 11, and the battery assembly 2 is provided with a positive lug 21 and a negative lug 22.
  • the positive lug 21 is mechanically and electrically connected to the cover 12, and the negative lug 22 is mechanically and electrically connected to the housing 11. .
  • the battery cell assembly 2 includes a positive electrode sheet 23 and a negative electrode sheet 24 that are stacked, and both the positive electrode sheet 23 and the negative electrode sheet 24 are elongated. Both sides of the positive electrode sheet 23 or the negative electrode sheet 24 are provided with a separator 25 (black film). In this embodiment, a separator 25 is provided on both sides of the negative electrode sheet 24, and the positive electrode sheet 23 and the negative electrode sheet 24 are wound into a disc shape.
  • the cell assembly 2 is formed, the positive lug 21 is led out from the positive sheet 23, and the negative lug 22 is led out from the negative sheet 24.
  • the battery cell assembly 2 includes a plurality of positive electrode sheets 23 and negative electrode sheets 24 that are stacked in a cross-section.
  • the shapes are the same and the sizes match.
  • a negative electrode sheet 24 is arranged between two adjacent positive electrode sheets 23, a positive electrode sheet 23 is arranged between two adjacent negative electrode sheets 24, between the positive electrode sheet 23 and the negative electrode sheet 24, and the upper and lower parts of the cell assembly 2.
  • a diaphragm 25 is provided on the outside of the pole pieces on the surface. All the positive plates 23 are connected in parallel, and a positive lug 21 is led out; all the negative plates 24 are connected in parallel, and a negative lug 22 is led out.

Abstract

A lithium ion battery, comprising: a housing assembly, comprising a housing, a cover plate and a sealing piece, an outwardly protruding brim being arranged at an opening of the housing, an inwardly opening accommodating groove being arranged on the brim, the sealing piece covering the periphery of the cover plate, an outer side of the sealing piece abutting against an inner wall of the accommodating groove; a cell assembly, arranged within the housing, the cell assembly being provided with a positive electrode tab and a negative electrode tab, the positive electrode tab being connected to the cover plate, the negative electrode tab being connected to the housing.

Description

锂离子电池Lithium Ion Battery
本申请要求申请日为2020年4月16日、申请号为202010300097.3的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application whose application date is April 16, 2020 and the application number is 202010300097.3. The entire content of this application is incorporated into this application by reference.
技术领域Technical field
本申请涉及锂离子电池技术领域，例如涉及一种锂离子电池。This application relates to the technical field of lithium ion batteries, for example, to a lithium ion battery.
背景技术Background technique
随着入耳式蓝牙耳机的发展，纽扣电池应用领域越来越广泛，而且多是接近身体敏感部位的电子器件上。中国专利CN201080007121.9公开了一种纽扣电池和用于产生该纽扣电池的方法，纽扣电池包括第一金属杯、第二金属杯及绝缘密封，第一金属杯***于第二金属杯内，绝缘密封的一部分包覆于第一金属杯的开口处，另一部分设置于第一金属杯的外壁和第二金属杯的内壁之间。在第一金属杯内部设置有电极片。而且需要在第一金属杯的底部的边缘设置有倒角，第二金属杯的开口需要向内收拢，以将第一金属杯及绝缘密封固定于第二金属杯的内部。这种纽扣电池的方式结构复杂，制作成本高。With the development of in-ear Bluetooth headsets, button batteries have become more and more widely used, and most of them are electronic devices close to sensitive parts of the body. Chinese patent CN201080007121.9 discloses a button battery and a method for producing the button battery. The button battery includes a first metal cup, a second metal cup and an insulating seal. The first metal cup is inserted into the second metal cup and is insulated A part of the seal is wrapped around the opening of the first metal cup, and the other part is arranged between the outer wall of the first metal cup and the inner wall of the second metal cup. Electrode sheets are arranged inside the first metal cup. Moreover, a chamfer needs to be provided on the edge of the bottom of the first metal cup, and the opening of the second metal cup needs to be folded inward to fix the first metal cup and the insulating seal to the inside of the second metal cup. This button battery has a complicated structure and high manufacturing cost.
发明内容Summary of the invention
本申请提供了一种锂离子电池，其结构比较简单，且具有较高的密封性。The application provides a lithium ion battery, which has a relatively simple structure and high sealing performance.
一实施例提供一种锂离子电池，包括：An embodiment provides a lithium ion battery, including:
壳体组件，其包括壳体、盖板及密封件，所述壳体的开口处向外凸设有帽檐，所述帽檐上设置有开口朝内的容纳槽，所述密封件包覆于所述盖板的周边，所述密封件的外侧抵压于所述容纳槽的内壁；A housing assembly, which includes a housing, a cover plate and a sealing element. The opening of the housing is provided with a brim outwards, the brim is provided with a receiving groove with an opening facing inward, and the sealing element is wrapped around the On the periphery of the cover plate, the outer side of the sealing member presses against the inner wall of the containing groove;
电芯组件，其设置于所述壳体内，所述电芯组件设置有正极耳和负极耳，所述正极耳连接于所述盖板，所述负极耳连接于所述壳体。The battery cell assembly is arranged in the housing, the battery assembly is provided with a positive electrode ear and a negative electrode ear, the positive electrode ear is connected to the cover plate, and the negative electrode ear is connected to the housing.
可选的，所述电芯组件包括层叠设置的正极片和负极片，所述正极片或所述负极片的两侧均设置有隔膜，所述正极片和所述负极片卷绕成圆盘状形成所述电芯组件，所述正极片上引出有所述正极耳，所述负极片上引出有负极耳。Optionally, the battery cell assembly includes a positive electrode sheet and a negative electrode sheet that are stacked, a separator is provided on both sides of the positive electrode sheet or the negative electrode sheet, and the positive electrode sheet and the negative electrode sheet are wound into a disc The battery cell assembly is formed in a shape, the positive electrode tab is led out from the positive electrode sheet, and the negative electrode tab is led out from the negative electrode sheet.
可选的，所述电芯组件包括多个交叉层叠设置的正极片和负极片，相邻两个所述正极片之间设置有一个所述负极片，相邻两个所述负极片之间设置有一 个所述正极片，所述正极片和所述负极片之间设置有隔膜，所述电芯组件的上下两个表面的极片的外侧设置有所述隔膜；Optionally, the battery cell assembly includes a plurality of positive electrode sheets and negative electrode sheets arranged in a cross stack, one negative electrode sheet is arranged between two adjacent positive electrode sheets, and a negative electrode sheet is arranged between two adjacent negative electrode sheets. A positive electrode sheet is provided, a separator is provided between the positive electrode sheet and the negative electrode sheet, and the separator is provided on the outside of the pole pieces on the upper and lower surfaces of the cell assembly;
所有的所述正极片并联连接，且引出有所述正极耳；所有的所述负极片并联连接，且引出有所述负极耳。All the positive plates are connected in parallel, and the positive lugs are led out; all the negative plates are connected in parallel, and the negative lugs are led out.
可选的，所述密封件的材质为塑胶。Optionally, the material of the seal is plastic.
本申请提供锂离子电池，壳体组件包括壳体、盖板及密封件，盖板和密封件的结构简单，使该锂离子电池的结构工艺简单化；而且密封件的外侧抵压于容纳槽的内壁，即帽檐的内侧，使密封件被挤压于盖板的边缘和帽檐之间，使整个壳体组件的密封性比较高。The present application provides a lithium ion battery. The casing assembly includes a casing, a cover plate and a sealing element. The structure of the cover plate and the sealing element is simple, which simplifies the structure and process of the lithium ion battery; and the outer side of the sealing element is pressed against the containing groove The inner wall of the visor, that is, the inner side of the brim, makes the sealing member squeeze between the edge of the cover plate and the brim, so that the sealing performance of the entire housing assembly is relatively high.
附图说明Description of the drawings
图1是本申请提供的锂离子电池的结构示意图；FIG. 1 is a schematic diagram of the structure of a lithium ion battery provided by the present application;
图2是本申请提供的锂离子电池的剖视图(电芯组件呈圆盘状)；2 is a cross-sectional view of the lithium ion battery provided by the present application (the battery cell assembly is in the shape of a disc);
图3是本申请提供的锂离子电池的剖视图(正极片和负极片层叠设置)。Fig. 3 is a cross-sectional view of the lithium ion battery provided by the present application (the positive electrode sheet and the negative electrode sheet are stacked).
图中：1、壳体组件；11、壳体；111、帽檐；1111、容纳槽；12、盖板；13、密封件；In the figure: 1. housing assembly; 11, housing; 111, brim; 1111, containing groove; 12, cover plate; 13, seal;
2、电芯组件；21、正极耳；22、负极耳；23、正极片；24、负极片；25、隔膜。2. Cell assembly; 21, positive ear; 22, negative ear; 23, positive sheet; 24, negative sheet; 25, separator.
具体实施方式Detailed ways
在本申请的描述中，需要说明的是，术语“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”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，或者是该申请产品使用时惯常摆放的方位或位置关系，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”、“第三”等仅用于区分描述，而不能理解为指示或暗示相对重要性。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of this application, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or The positional relationship is based on the position or positional relationship shown in the drawings, or the position or positional relationship that the application product is usually placed in use, only for the convenience of describing the application and simplifying the description, rather than indicating or implying the pointed device Or the element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. In the description of this application, unless otherwise specified, "plurality" means two or more.
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“设置”、“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。对于本领域的普通技 术人员而言，可以具体情况理解上述术语在本申请中的具体含义。In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Integrally connected; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.
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。In this application, unless expressly stipulated and defined otherwise, the "on" or "under" of the first feature of the second feature may include direct contact between the first and second features, or may include the first and second features Not in direct contact but through other features between them. Moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature. The “below”, “below” and “below” of the second feature of the first feature include the first feature directly below and obliquely below the second feature, or it simply means that the level of the first feature is smaller than the second feature.
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present application, and should not be construed as a limitation to the present application.
如图1所示，本实施例公开了一种锂离子电池，其包括壳体组件1和电芯组件2。As shown in FIG. 1, this embodiment discloses a lithium ion battery, which includes a casing assembly 1 and a battery cell assembly 2.
壳体组件1包括壳体11、盖板12及密封件13，壳体11和盖板12的材质均为不锈钢。壳体11呈杯状，盖板12为圆片状。The housing assembly 1 includes a housing 11, a cover plate 12, and a sealing member 13. The housing 11 and the cover plate 12 are made of stainless steel. The housing 11 has a cup shape, and the cover 12 has a disc shape.
壳体11的开口处向外凸设有帽檐111，帽檐111上设置有开口朝内的容纳槽1111，密封件13包覆于盖板12的周边，密封件13的外侧抵压于容纳槽1111的内壁。密封件13呈圆环状，内壁上环设有凹槽，密封件13套于盖板12上，使盖板12的周边伸入于凹槽内。而且密封件13与盖板12之间过盈配合。为了保证二者之间的密封性在盖板12的周边和/或密封件13的凹槽内涂覆有密封胶。密封件13的外侧面和上下两个表面靠近外侧面的部分均与容纳槽1111的内壁相抵压贴合。为了保证密封件13和帽檐111之间的密封性，在密封件13的外周边和/或容纳槽1111的内壁上涂覆有密封胶。密封件13的材质为耐电解液腐蚀的塑胶，本实施例中为PP材质。A brim 111 is protruding outward from the opening of the housing 11, and a receiving groove 1111 with an inward opening is provided on the brim 111. The sealing member 13 covers the periphery of the cover plate 12, and the outer side of the sealing member 13 is pressed against the receiving groove 1111 The inner wall. The sealing member 13 has a circular ring shape, a groove is provided on the inner wall, and the sealing member 13 is sleeved on the cover plate 12 so that the periphery of the cover plate 12 extends into the groove. Moreover, there is an interference fit between the sealing member 13 and the cover plate 12. In order to ensure the tightness between the two, a sealant is coated on the periphery of the cover plate 12 and/or in the groove of the sealing member 13. The outer side surface and the upper and lower surfaces of the sealing member 13 close to the outer side surfaces are pressed against the inner wall of the containing groove 1111. In order to ensure the sealing performance between the sealing member 13 and the brim 111, a sealant is coated on the outer periphery of the sealing member 13 and/or the inner wall of the containing groove 1111. The material of the sealing member 13 is a plastic resistant to corrosion by the electrolyte, and in this embodiment, it is made of PP.
盖板12的封装工艺：壳体11起初加工成阶梯状，开口处的外径比较大，帽檐111为大孔径段；待壳体11内的电芯组件2安装完成之后，将组装好的盖板12和密封件13放置于大孔径段内；然后辊压壳体11的开口处的边缘，使其向内弯折45°，对盖板12和密封件13进行初步固定；再然后将被弯折的部分继续向下辊压，使之与壳体11的底面相平行，以使帽檐111处形成容纳槽1111，并将盖板12和密封件13组装于壳体11的容纳槽1111内。The packaging process of the cover plate 12: the housing 11 is initially processed into a stepped shape, the outer diameter of the opening is relatively large, and the brim 111 is a large aperture section; after the battery cell assembly 2 in the housing 11 is installed, the assembled cover The plate 12 and the sealing element 13 are placed in the large aperture section; then the edge of the opening of the shell 11 is rolled to bend it inwardly by 45°, and the cover plate 12 and the sealing element 13 are preliminarily fixed; The bent part continues to be rolled down to make it parallel to the bottom surface of the housing 11, so that a receiving groove 1111 is formed at the brim 111, and the cover plate 12 and the sealing member 13 are assembled in the receiving groove 1111 of the housing 11 .
锂离子电池的壳体组件1包括壳体11、盖板12及密封件13，盖板12和密封件13的结构简单，使该锂离子电池的结构工艺简单化；而且密封件13的外侧抵压于容纳槽1111的内壁，即帽檐111的内侧，使密封件13被挤压于盖板12的边缘和帽檐111之间，使整个壳体组件1的密封性比较高。The housing assembly 1 of the lithium ion battery includes a housing 11, a cover plate 12, and a sealing member 13. The cover plate 12 and the sealing member 13 have a simple structure, which simplifies the structure and process of the lithium ion battery; and the outer side of the sealing member 13 is against Pressing on the inner wall of the containing groove 1111, that is, the inner side of the brim 111, causes the sealing member 13 to be squeezed between the edge of the cover plate 12 and the brim 111, so that the sealing performance of the entire housing assembly 1 is relatively high.
电芯组件2设置于壳体11内，电芯组件2设置有正极耳21和负极耳22，正极耳21机械且电性连接于盖板12，负极耳22机械且电性连接于壳体11。The battery cell assembly 2 is arranged in the housing 11, and the battery assembly 2 is provided with a positive lug 21 and a negative lug 22. The positive lug 21 is mechanically and electrically connected to the cover 12, and the negative lug 22 is mechanically and electrically connected to the housing 11. .
如图2所示，本实施例中，电芯组件2包括层叠设置的正极片23和负极片24，正极片23和负极片24均为长条状。正极片23或负极片24的两侧均设置有隔膜25(黑膜)，本实施例中在负极片24的两侧均设置有隔膜25，正极片23和负极片24卷绕成圆盘状形成电芯组件2，正极耳21从正极片23上引出，负极耳22从负极片24上引出。As shown in FIG. 2, in this embodiment, the battery cell assembly 2 includes a positive electrode sheet 23 and a negative electrode sheet 24 that are stacked, and both the positive electrode sheet 23 and the negative electrode sheet 24 are elongated. Both sides of the positive electrode sheet 23 or the negative electrode sheet 24 are provided with a separator 25 (black film). In this embodiment, a separator 25 is provided on both sides of the negative electrode sheet 24, and the positive electrode sheet 23 and the negative electrode sheet 24 are wound into a disc shape. The cell assembly 2 is formed, the positive lug 21 is led out from the positive sheet 23, and the negative lug 22 is led out from the negative sheet 24.
如图3所示，在其它实施例中，电芯组件2包括多个交叉层叠设置的正极片23和负极片24，正极片23和负极片24均呈圆盘状，与壳体11的截面的形状相同，尺寸相匹配。相邻两个正极片23之间设置有一个负极片24，相邻两个负极片24之间设置有一个正极片23，正极片23和负极片24之间以及电芯组件2的上下两个表面的极片的外侧均设置有隔膜25。所有的正极片23并联连接，且引出有正极耳21；所有的负极片24并联连接，且引出有负极耳22。As shown in FIG. 3, in other embodiments, the battery cell assembly 2 includes a plurality of positive electrode sheets 23 and negative electrode sheets 24 that are stacked in a cross-section. The shapes are the same and the sizes match. A negative electrode sheet 24 is arranged between two adjacent positive electrode sheets 23, a positive electrode sheet 23 is arranged between two adjacent negative electrode sheets 24, between the positive electrode sheet 23 and the negative electrode sheet 24, and the upper and lower parts of the cell assembly 2. A diaphragm 25 is provided on the outside of the pole pieces on the surface. All the positive plates 23 are connected in parallel, and a positive lug 21 is led out; all the negative plates 24 are connected in parallel, and a negative lug 22 is led out.

Claims (4)

  1. 一种锂离子电池，包括：A lithium ion battery, including:
    壳体组件(1)，其包括壳体(11)、盖板(12)及密封件(13)，所述壳体(11)的开口处向外凸设有帽檐(111)，所述帽檐(111)上设置有开口朝内的容纳槽(1111)，所述密封件(13)包覆于所述盖板(12)的周边，所述密封件(13)的外侧抵压于所述容纳槽(1111)的内壁；A housing assembly (1), which includes a housing (11), a cover (12), and a sealing member (13). The opening of the housing (11) is provided with a brim (111) protruding outwards, the brim (111) is provided with a receiving groove (1111) with an opening facing inward, the sealing member (13) is wrapped around the periphery of the cover plate (12), and the outer side of the sealing member (13) is pressed against the The inner wall of the containing tank (1111);
    电芯组件(2)，其设置于所述壳体(11)内，所述电芯组件(2)设置有正极耳(21)和负极耳(22)，所述正极耳(21)连接于所述盖板(12)，所述负极耳(22)连接于所述壳体(11)。The cell assembly (2) is arranged in the casing (11), the cell assembly (2) is provided with a positive ear (21) and a negative ear (22), and the positive ear (21) is connected to The cover plate (12) and the negative lug (22) are connected to the casing (11).
  2. 根据权利要求1所述的锂离子电池，其中，所述电芯组件(2)包括层叠设置的正极片(23)和负极片(24)，所述正极片(23)或所述负极片(24)的两侧均设置有隔膜(25)，所述正极片(23)和所述负极片(24)卷绕成圆盘状形成所述电芯组件(2)，所述正极片(23)上引出有所述正极耳(21)，所述负极片(24)上引出有所述负极耳(22)。The lithium ion battery according to claim 1, wherein the battery cell assembly (2) comprises a positive electrode sheet (23) and a negative electrode sheet (24) which are stacked, and the positive electrode sheet (23) or the negative electrode sheet ( Separator (25) is provided on both sides of 24), the positive electrode sheet (23) and the negative electrode sheet (24) are wound into a disc shape to form the cell assembly (2), and the positive electrode sheet (23) The positive electrode lug (21) is led out from ), and the negative electrode lug (22) is led out from the negative electrode sheet (24).
  3. 根据权利要求1所述的锂离子电池，其中，所述电芯组件(2)包括多个交叉层叠设置的正极片(23)和负极片(24)，相邻两个所述正极片(23)之间设置有一个所述负极片(24)，相邻两个所述负极片(24)之间设置有一个所述正极片(23)，所述正极片(23)和所述负极片(24)之间设置有隔膜(25)，所述电芯组件(2)的上下两个表面的极片的外侧设置有所述隔膜(25)；The lithium-ion battery according to claim 1, wherein the battery cell assembly (2) comprises a plurality of positive electrode sheets (23) and negative electrode sheets (24) arranged in a cross layer, two adjacent positive electrode sheets (23) ) Is provided with a negative plate (24), between two adjacent negative plates (24) is provided with a positive plate (23), the positive plate (23) and the negative plate (24) A diaphragm (25) is arranged between, and the diaphragm (25) is arranged on the outer side of the pole pieces on the upper and lower surfaces of the cell assembly (2);
    所有的所述正极片(23)并联连接，且引出有所述正极耳(21)；所有的所述负极片(24)并联连接，且引出有所述负极耳(22)。All the positive plates (23) are connected in parallel, and the positive lugs (21) are led out; all the negative plates (24) are connected in parallel, and the negative lugs (22) are led out.
  4. 根据权利要求1所述的锂离子电池，其中，所述密封件(13)的材质为塑胶。The lithium ion battery according to claim 1, wherein the material of the sealing member (13) is plastic.
PCT/CN2020/086347 2020-04-16 2020-04-23 Lithium ion battery WO2021208128A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114284542A (en) * 2021-12-28 2022-04-05 山西中科华孚汽车动力研究总院有限公司 Battery manufacturing method and battery

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112563629B (en) * 2020-11-20 2023-06-09 曙鹏科技（深圳）有限公司 Method for manufacturing soft package battery and first soft package half-shell

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013037796A (en) * 2011-08-04 2013-02-21 Panasonic Corp Nonaqueous electrolyte coin-shaped battery
CN204596909U (en) * 2015-03-25 2015-08-26 深圳金山电池有限公司 A kind of Novel button lithium ion battery
CN106654077A (en) * 2017-01-23 2017-05-10 珠海微矩实业有限公司 Button battery
CN109449320A (en) * 2018-11-06 2019-03-08 河南省鹏辉电源有限公司 A kind of button cell shell mechanism, button cell and electrical equipment
KR20200007562A (en) * 2018-07-13 2020-01-22 주식회사 엘지화학 Secondary battery and method for manufacturing the battery
CN210245625U (en) * 2019-05-28 2020-04-03 深圳金山电池有限公司 Button cell packaging structure
CN210379130U (en) * 2020-02-27 2020-04-21 比亚迪股份有限公司 Button cell

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013037796A (en) * 2011-08-04 2013-02-21 Panasonic Corp Nonaqueous electrolyte coin-shaped battery
CN204596909U (en) * 2015-03-25 2015-08-26 深圳金山电池有限公司 A kind of Novel button lithium ion battery
CN106654077A (en) * 2017-01-23 2017-05-10 珠海微矩实业有限公司 Button battery
KR20200007562A (en) * 2018-07-13 2020-01-22 주식회사 엘지화학 Secondary battery and method for manufacturing the battery
CN109449320A (en) * 2018-11-06 2019-03-08 河南省鹏辉电源有限公司 A kind of button cell shell mechanism, button cell and electrical equipment
CN210245625U (en) * 2019-05-28 2020-04-03 深圳金山电池有限公司 Button cell packaging structure
CN210379130U (en) * 2020-02-27 2020-04-21 比亚迪股份有限公司 Button cell

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114284542A (en) * 2021-12-28 2022-04-05 山西中科华孚汽车动力研究总院有限公司 Battery manufacturing method and battery
CN114284542B (en) * 2021-12-28 2024-02-06 山西中科华孚电池研究总院有限公司 Manufacturing method of battery and battery

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