WO2019095612A1 - 电池的顶盖结构 - Google Patents

电池的顶盖结构 Download PDF

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Publication number
WO2019095612A1
WO2019095612A1 PCT/CN2018/081919 CN2018081919W WO2019095612A1 WO 2019095612 A1 WO2019095612 A1 WO 2019095612A1 CN 2018081919 W CN2018081919 W CN 2018081919W WO 2019095612 A1 WO2019095612 A1 WO 2019095612A1
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WO
WIPO (PCT)
Prior art keywords
top cover
sheet
cover sheet
base plate
hole
Prior art date
Application number
PCT/CN2018/081919
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English (en)
French (fr)
Inventor
王有生
丁朝阳
丁坤
Original Assignee
深圳市瑞德丰精密制造有限公司
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Publication of WO2019095612A1 publication Critical patent/WO2019095612A1/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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the 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
    • H01M50/10—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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • 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
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/578—Devices or arrangements for the interruption of current in response to pressure
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • H01M50/593—Spacers; Insulating plates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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

  • the present invention relates to the technical field of batteries, and more particularly to the top cover structure of batteries.
  • Lithium batteries are Its high capacity and other excellent characteristics are widely used in electronic products.
  • the lithium battery comprises a casing, a cover sheet, a battery core and the like, wherein the electric core is disposed inside the casing, the upper end of the casing has an upper end opening, and the top cover piece is closed at an opening of the upper end of the casing, and the top cover piece is provided with
  • the conductive block, the lower part of the conductive block is connected to the battery core through the conductive sheet, and the upper end extends through the hole of the top cover sheet to the outside of the battery to realize power supply to the outside.
  • the conductive block when the conductive block is subjected to external force, the conductive block is likely to be twisted relative to the top cover sheet, resulting in a change in the internal structure of the lithium battery, reducing the service life of the lithium battery, which is not conducive to lithium. Use of the battery.
  • the top cover structure of the battery provided by the present invention is intended to solve the problem that in the prior art, when the lithium battery is subjected to the external force during the use of the lithium battery, the conductive block is likely to be twisted relative to the top cover sheet, resulting in a lithium battery.
  • the internal structure changes, reducing the service life of the lithium battery, which is not conducive to the use of the lithium battery.
  • the present invention is achieved by the invention comprising a top cover sheet, a bracket disposed at the bottom of the top cover sheet, and a conductive block, the bottom of the bracket abutting the bottom of the top cover sheet, the conductive block including the base plate and Forming two columns on the base plate and spaced apart, the top cover sheets are formed with two column holes corresponding to the two columns, and the two columns respectively pass through two
  • the post holes extend above the top cover sheets to form extensions, respectively, and the two extensions are respectively riveted to the rivet sheets disposed on the top of the top cover sheets.
  • the base plate is provided with a through hole penetrating the lower plate of the base plate, and the through hole is provided with a flipping piece, and the outer peripheral side wall of the flipping piece is sealedly connected with the inner side wall of the through hole. .
  • the inverting sheet includes a circular body and a butting block disposed at a center of the body, and the body is concavely disposed downward in a radial direction from the outside to the inside of the body.
  • a gap is provided between the inner side wall of the column hole and the outer peripheral side wall of the column body.
  • the bracket is provided with a placement hole for the base plate to be placed, and when the conductive block is assembled with the bracket, the base plate of the conductive block is embedded in the placement hole.
  • the top cover structure of the battery further includes a sealing ring, the top of the sealing ring abuts the top cover sheet, and the bottom of the sealing ring abuts the top of the base plate.
  • the top cover structure of the battery further includes an insulating sheet, a bottom of the insulating sheet abuts the top of the top cover sheet, and a top of the insulating sheet abuts against a bottom of the rivet sheet.
  • the insulating sheet is provided with a through hole through which the column passes, and a bottom of the insulating sheet is provided with a wrapping ring for wrapping the column, and the wrapping ring is arranged around the through hole .
  • a rupture disc is disposed on the top cover sheet.
  • the top cover structure of the battery forms two column holes corresponding to the two columns on the top cover sheet by forming two spaced apart columns on the base plate.
  • the two cylinders respectively extend through the two column holes to the top cover sheet, so that the two columns function as two points for positioning, so that the connection between the conductive block and the top cover sheet is stronger, and the conductive block is prevented from being exposed to the outside.
  • the conductive block is twisted relative to the top cover sheet, which solves the problem that when the conductive block is subjected to the external force during the use of the lithium battery, the conductive block is likely to be twisted relative to the top cover piece, resulting in lithium.
  • the internal structure of the battery changes, reducing the service life of the lithium battery, which is not conducive to the use of the lithium battery.
  • FIG. 1 is a perspective view of a top cover structure of a battery according to an embodiment of the present invention
  • FIG. 2 is an exploded perspective view showing a structure of a top cover of a battery according to an embodiment of the present invention
  • FIG. 3 is a perspective view of a conductive block of a top cover structure of a battery according to an embodiment of the present invention
  • FIG. 4 is a cross-sectional view showing the structure of a top cover of a battery according to an embodiment of the present invention.
  • the top cover structure of the battery provided by the invention is used for solving the problem that the conductive block of the lithium battery is twisted by the outer cover piece when the conductive block of the lithium battery is subjected to the external force, thereby causing a change in the internal structure of the lithium battery and reducing the use of the lithium battery.
  • the lifetime is not conducive to the use of the lithium battery, and can be used in other types of batteries, and is not limited to the embodiment.
  • the top cover structure of the battery includes a top cover sheet 11, a bracket 12 disposed at the bottom of the top cover sheet 11, and a conductive block 13, and the bottom of the bracket 12 abuts against the bottom of the top cover sheet 11, so that the bracket 12 can be opposed to the top cover sheet 11
  • the function of the other fixed supports makes the top cover sheet 11 more rigid and withstand pressure;
  • the conductive block 13 includes a base plate 131 and two pillars 132 formed on the base plate 131 and spaced apart, and the top cover sheet 11 is formed with two The two columns 132 corresponding to the two columns 132 respectively extend through the two column holes 111 to the top cover sheet 11 so that the external electrical equipment can be directly connected to the column 132.
  • the lithium battery supplies power to the outside; the column 132 extending above the top cover sheet 11 forms an extension, and the two extensions are respectively riveted to the rivet piece 14 disposed at the top of the top cover sheet 11, such that the conductive block 13 and the top cover sheet 11 are Ability to quickly complete a fixed connection.
  • two column holes 111 corresponding to the two columns 132 are formed on the top cover sheet 11 by forming two spaced apart columns 132 on the base plate 131, two The pillars 132 extend through the two pillar holes 111 to the top of the top cover sheet 11, respectively, so that the two pillars 132 function as two points for positioning, so that the connection between the conductive block 13 and the top cover sheet 11 is stronger, and the conductive block is avoided.
  • the conductive block 13 is twisted relative to the top cover sheet 11, and the conductive block 13 is easily generated when the conductive block 13 is subjected to external force during the use of the lithium battery.
  • the twisting of the top cover sheet 11 causes a change in the internal structure of the lithium battery, which reduces the service life of the lithium battery, which is disadvantageous for the use of the lithium battery.
  • the base plate 131 is provided with a through hole penetrating through the upper and lower sides of the base plate 131.
  • the through hole is provided with a flipping piece 18, and the outer peripheral side wall of the flipping piece 18 is sealedly connected with the inner side wall of the through hole.
  • the flipping sheet 18 is turned over, causing a short circuit of the lithium battery, and the chemical reaction inside the lithium battery is stopped, thereby preventing the internal pressure of the lithium battery from continuing to increase and exploding.
  • the flip chip 18 is disposed on the base plate 131, so that the flip chip 18 does not need to be separately installed during the assembly of the lithium battery, thereby improving the production efficiency of the lithium battery.
  • the inverting piece 18 includes a circular body and abutting block disposed at the center of the body, and the outer peripheral side wall of the body is sealingly connected with the inner side wall of the through hole on the base plate 131, when the flipping piece 18 is turned over.
  • the bottom of the docking block abuts against the bottom of the top cover sheet, so that the battery stops working.
  • the sheet body is recessed downward, so that the area of the flip sheet 18 is increased in the case where the diameter of the flip sheet 18 is the same, so that the flip sheet 18 is pressed against the internal pressure of the battery.
  • the change is more sensitive, increasing the sensitivity of the flipper 18.
  • a gap is provided between the inner side wall of the column hole 111 and the outer peripheral side wall of the column 132, so that the column 132 is more easily passed through the column hole 111 during assembly of the lithium battery, facilitating assembly of the lithium battery.
  • a gap is provided between the inner side wall of the column hole 111 and the outer peripheral side wall of the column 132, it is convenient for subsequent sealing of the inside of the lithium battery.
  • the bracket 12 is provided with a placement hole 121 for the base plate 131.
  • the base plate 131 of the conductive block 13 is embedded in the placement hole 121, and the placement hole 121 is disposed.
  • the distance between the bracket 12 and the top cover sheet 11 can be reduced, the internal space of the battery can be increased, and the capacity of the battery can be increased. Further, by placing the hole 121, the bracket 12 can be quickly positioned to play a role of rapid positioning.
  • the top cover structure of the battery further includes a sealing ring 15, the top of the sealing ring 15 abuts against the top cover sheet 11, and the bottom of the sealing ring 15 abuts against the top of the base plate 131.
  • the base plate 131 and the top cover sheet 11 are completely sealed to prevent external substances from entering the inside of the lithium battery, thereby adversely affecting the lithium battery.
  • the sealing ring 15, the top cover sheet 11 and the base plate 131 are surrounded by a sealing region, and the pillar 132 sequentially extends through the sealing region and the column hole 111 to the outside of the lithium battery.
  • the top cover structure of the battery further includes an insulating sheet 16, the bottom of which is abutted against the top of the top cover sheet 11, and the top of the insulating sheet 16 abuts against the bottom of the rivet sheet 14.
  • the rivet tab 14 is separated from the cap sheet 11 by the insulating sheet 16 to avoid direct contact of the rivet tab 14 with the cap sheet 11.
  • the top of the insulating sheet 16 is provided with a placement area for placing the rivet sheet 14, and the same placement area enables the insulating sheet 16 to quickly find the mounting position and improve the assembly efficiency of the battery.
  • the insulating sheet 16 is provided with a through hole 161 through which the column 132 passes, and the bottom of the insulating sheet 16 is provided with a wrapping ring for wrapping the column 132, and the wrapping ring is disposed around the through hole 161.
  • the bottom of the insulating sheet 16 abuts against the top of the top cover sheet 11, and the cylindrical body 132 is bored in the through hole 161, and the wrapping ring encloses the column 132 and extends downward.
  • the gap is provided in the gap provided between the inner side wall of the column hole 111 and the outer peripheral side wall of the column 132, so that the gap provided between the inner side wall and the outer peripheral side wall of the column 132 can be sealed.
  • the lower end portion of the wrapping ring extends downward and abuts against the upper end portion of the sealing ring 15.
  • the rupture disc 17 is disposed on the top cover sheet 11.
  • the rupture disc 17 When the internal pressure of the lithium battery exceeds a certain value, the rupture disc 17 will be broken, causing abnormal gas inside the lithium battery to leak out, reducing the pressure inside the lithium battery, and preventing the lithium battery from being caused by excessive internal pressure. The explosion has occurred, making the use of lithium batteries safer.
  • the conductive sheet 10 is soldered on the top cover sheet 11, the sealing ring 15 is disposed on the conductive block 13, and then the integral device formed by the sealing ring 15 and the conductive block 13 is placed in the placement hole 121 of the bracket 12, and the bracket is again The device is at the lower portion of the top cover sheet 11.
  • the two pillars 132 of the conductive block 13 pass through the column holes 111 of the top cover sheet 11, the rivet tabs 14 are placed on the top of the insulating sheet 16, and the rivets are placed.
  • the insulating sheet 16 of 14 is placed on top of the top cover sheet 11, and the two pillars 132 of the conductive block 13 pass through the insulating sheet 16 and the rivet sheet 14, respectively, and are then subjected to riveting and welding.

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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

一种电池的顶盖结构，包括顶盖片（11）、设置在顶盖片底部的支架（12）以及导电块（13），支架的顶部与顶盖片的底部抵接，导电块包括底座板（131）和形成在底座板上且相间隔布置的两个柱体（132），顶盖片上形成有与两个柱体对应的两个柱孔（111），两个柱体分别穿过两个柱孔延伸到顶盖片上方，分别形成延伸段，两个延伸段分别与设置在顶盖片顶部的铆接片（14）铆接。两个柱体起到两点定位的功能，使得导电块与顶盖片的连接更加牢固，避免了导电块受到外界的作用力时，导电块产生相对顶盖片扭动的情况发生。

Description

电池的顶盖结构 技术领域
本发明涉及电池的技术领域，尤其是电池的顶盖结构。
 背景技术
目前，随着电子产品的日益小型化、轻便化及便携带化，如摄像机、笔记本以及手机等，这些电子产品的驱动电源也向着高容量、高安全性以及轻便化的方向发展，锂电池以其高容量等优良特性，广泛地运用在电子产品中。
锂电池包括壳体、顶盖片以及电芯等，其中电芯置于壳体的内部，壳体的上端具有上端开口，顶盖片则封闭在壳体的上端的开口，顶盖片上设置有导电块，导电块的下部通过导电片与电芯连接，上端穿过顶盖片孔延伸到电池外，实现对外部的供电。
然而，在锂电池的使用过程中，导电块会受到外界的作用力时，导电块容易产生相对顶盖片的扭动，导致锂电池内部结构发生变化，降低锂电池的使用寿命，不利于锂电池的使用。
 技术问题
本发明提供的电池的顶盖结构，旨在解决现有技术中，锂电池在使用的过程中，导电块受到外界的作用力时，导电块容易产生相对顶盖片的扭动，导致锂电池内部结构发生变化，降低锂电池的使用寿命，不利于锂电池的使用的问题。
 技术解决方案
本发明是这样实现的，包括顶盖片、设置在所述顶盖片底部的支架以及导电块，所述支架的底部与所述顶盖片的底部抵接，所述导电块包括底座板和形成在所述底座板上且相间隔布置的两个柱体，所述顶盖片上形成有与两个所述柱体对应的两个柱孔，两个所述柱体分别对应穿过两个所述柱孔延伸到所述顶盖片上方，分别形成延伸段，两个所述延伸段分别与设置在所述顶盖片顶部的铆接片铆接。
进一步地，所述底座板上设置有贯穿所述底座板上下的通孔，所述通孔里设置有翻转片，所述翻转片的外周侧壁与所述通孔的内侧壁之间密封连接。
进一步地，所述翻转片包括呈圆形的片体和设置在所述片体中心的对接块，沿所述片体由外至内的径向方向，所述片体朝下凹陷布置。
进一步地，所述柱孔的内侧壁与所述柱体的外周侧壁之间设置有间隙。
进一步地，所述支架设置有供所述底座板放置的放置孔，当所述导电块与所述支架组装完成时，所述导电块的底座板镶嵌在所述放置孔中。
进一步地，所述电池的顶盖结构还包括密封圈，所述密封圈的顶部与所述顶盖片抵接，所述密封圈的底部与所述底座板的顶部抵接。
进一步地，所述电池的顶盖结构还包括绝缘片，所述绝缘片的底部与所述顶盖片的顶部抵接，所述绝缘片的顶部与所述铆接片的底部抵接。
进一步地，所述绝缘片上设置有供所述柱体穿过的穿过孔，所述绝缘片的底部设置有用于包裹所述柱体的包裹圈，所述包裹圈环绕所述穿过孔布置。
进一步地，所述顶盖片上设置有爆破片。
 有益效果
与现有技术相比，本发明提供的电池的顶盖结构，通过在底座板上形成两个相间隔布置的柱体，在顶盖片上形成有与两个柱体对应的两个柱孔，两个柱体分别穿过两个柱孔延伸到顶盖片上方，这样两个柱体起到两点定位的功能，使得导电块与顶盖片的连接更加牢固，避免了导电块会受到外界的作用力时，导电块产生相对顶盖片扭动的情况发生，解决了锂电池在使用的过程中，导电块受到外界的作用力时，导电块容易产生相对顶盖片的扭动，导致锂电池内部结构发生变化，降低锂电池的使用寿命，不利于锂电池的使用的问题。
 附图说明
图1是本发明实施例提供的电池的顶盖结构的立体示意图；
图2是本发明实施例提供的电池的顶盖结构的分解示意图；
图3是本发明实施例提供的电池的顶盖结构的导电块的立体示意图；
图4是本发明实施例提供的电池的顶盖结构的剖切示意图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
以下结合具体实施例对本发明的实现进行详细的描述。
本实施例的附图中相同或相似的标号对应相同或相似的部件；在本发明的描述中，需要理解的是，若有术语“上”、“下”、“左”、“右”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发明和简化描述，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，因此附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制，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的具体含义。
参照图1~4所示，为本发明提供的较佳实施例。
本发明提供的电池的顶盖结构，用于解决锂电池的导电块受到外界的作用力时，导电块容易产生相对顶盖片的扭动，导致锂电池内部结构发生变化，降低锂电池的使用寿命，不利于锂电池的使用的问题，亦可用于其他类型的电池中，不仅限于本实施例。
电池的顶盖结构，包括顶盖片11、设置在顶盖片11底部的支架12以及导电块13，支架12的底部与顶盖片11的底部抵接，这样支架12可以对顶盖片11其他固定支撑的作用，使得顶盖片11更加坚固耐压；导电块13包括底座板131和形成在底座板131上且相间隔布置的两个柱体132，顶盖片11上形成有与两个柱体132对应的两个柱孔111，两个柱体132分别对应穿过两个所述柱孔111延伸到顶盖片11上方，这样外界用电设备可直接连接在柱体132上，实现锂电池对外界的供电；延伸到顶盖片11上方的柱体132形成延伸段，两个延伸段分别与设置在顶盖片11顶部的铆接片14铆接，这样使得导电块13与顶盖片11能够快速完成固定连接。
上述提供的电池的顶盖结构，通过在底座板131上形成两个相间隔布置的柱体132，在顶盖片11上形成有与两个柱体132对应的两个柱孔111，两个柱体132分别穿过两个柱孔111延伸到顶盖片11上方，这样两个柱体132起到两点定位的功能，使得导电块13与顶盖片11的连接更加牢固，避免了导电块13会受到外界的作用力时，导电块13产生相对顶盖片11扭动的情况发生，解决了锂电池在使用的过程中，导电块13受到外界的作用力时，导电块13容易产生相对顶盖片11的扭动，导致锂电池内部结构发生变化，降低锂电池的使用寿命，不利于锂电池的使用的问题。
本实施例中，底座板131上设置有贯穿底座板131上下的通孔，通孔里设置有翻转片18，翻转片18的外周侧壁与通孔的内侧壁之间密封连接，当锂电池内部的压力过大时，翻转片18发生翻转，使得锂电池发生短路，锂电池内部的化学反应停止，避免锂电池内部压力继续增大而发生爆炸。将翻转片18设置在底座板131上，这样在锂电池组装过程中无需单独安装翻转片18，提高了锂电池的生产效率。
具体地，翻转片18包括呈圆形的片体和设置在片体中心的对接块，片体的外周侧壁与底座板131上的通孔的内侧壁密封连接，当翻转片18发生翻转的时候，对接块的底部抵接在顶盖片的底部，使得电池停止工作。沿片体由外至内的径向方向，片体朝下凹陷布置，这样，在翻转片18的直径大小相同的情况下，使得翻转片18的面积增大，使得翻转片18对电池内部压力的变化更加敏感，提高翻转片18的灵敏度。
具体地，柱孔111的内侧壁与柱体132的外周侧壁之间设置有间隙，  这样，在锂电池组装过程中，使得柱体132更加容易穿过柱孔111，便于锂电池的组装。另外，通过在柱孔111的内侧壁与柱体132的外周侧壁之间设置间隙，为后续对锂电池内部的密封提供便利。
本实施例中，支架12设置有供底座板131放置的放置孔121，当导电块13与支架12组装完成时，导电块13的底座板131镶嵌在放置孔121中，通过设置放置孔121，可以使得支架12与顶盖片11之间的距离缩小，增大电池的内部空间，提高电池的容量；此外，通过放置孔121可以使得支架12快速确定位置，起到快速定位的作用。
电池的顶盖结构还包括密封圈15，密封圈15的顶部与顶盖片11抵接，密封圈15的底部与底座板131的顶部抵接。这样，使得底座板131与顶盖片11之间完全密封，避免外界物质进入锂电池内部，对锂电池造成不良影响。本实施例中，密封圈15、顶盖片11以及底座板131包围形成有密封区域，柱体132依次穿过密封区域和柱孔111延伸到锂电池外。
电池的顶盖结构还包括绝缘片16，绝缘片16的底部与顶盖片11的顶部抵接，绝缘片16的顶部与铆接片14的底部抵接。通过绝缘片16将铆接片14与顶盖片11分隔开，避免铆接片14与顶盖片11的直接接触。本实施例中，绝缘片16顶部设置有供铆接片14放置的放置区域，同过放置区域使得绝缘片16能够迅速找准安装位置，提高电池的组装效率。
具体地，绝缘片16上设置有供柱体132穿过的穿过孔161，绝缘片16的底部设置有用于包裹柱体132的包裹圈，该包裹圈环绕穿过孔161布置。在绝缘片16安装在预定的位置时，绝缘片16的底部抵接在顶盖片11的顶部，柱体132穿设在穿过孔161中，包裹圈包裹住柱体132并朝下延伸，嵌入到柱孔111的内侧壁与柱体132的外周侧壁之间设置的间隙中，这样，可以将内侧壁与柱体132的外周侧壁之间设置的间隙密封。本实施例中，包裹圈的下端部朝下延伸并与密封圈15的上端部抵接。
本实施例中，顶盖片11上设置有爆破片17。通过设置爆破片17，当锂电池的内部压力超过一定值时，爆破片17会破裂，使得锂电池内部的异常气体泄出，降低锂电池内部的压力，避免锂电池因内部压力过大而发生爆炸的情况出现，使得锂电池的使用更加安全。
锂电池在组装时，导电片10焊接在顶盖片11上，密封圈15装置在导电块13上，然后密封圈15与导电块13形成的整体装置在支架12的放置孔121中，支架再装置在顶盖片11的下部，此时，导电块13的两个柱体132穿过顶盖片11的柱孔111，将铆接片14放置在绝缘片16的顶部，且将放置有铆接片14的绝缘片16放置在顶盖片11顶部，导电块13的两个柱体132分别穿过绝缘片16以及铆接片14，然后再进行铆压焊接。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 电池的顶盖结构，其特征在于，包括顶盖片、设置在所述顶盖片底部的支架以及导电块，所述支架的底部与所述顶盖片的底部抵接，所述导电块包括底座板和形成在所述底座板上且相间隔布置的两个柱体，所述顶盖片上形成有与两个所述柱体对应的两个柱孔，两个所述柱体分别对应穿过两个所述柱孔延伸到所述顶盖片上方，分别形成延伸段，两个所述延伸段分别与设置在所述顶盖片顶部的铆接片铆接。
  2. 如权利要求1所述的电池的顶盖结构，其特征在于，所述底座板上设置有贯穿所述底座板上下的通孔，所述通孔里设置有翻转片，所述翻转片的外周侧壁与所述通孔的内侧壁之间密封连接。
  3. 如权利要求2所述的电池的顶盖结构，其特征在于，所述翻转片包括呈圆形的片体和设置在所述片体中心的对接块，沿所述片体由外至内的径向方向，所述片体朝下凹陷布置。
  4. 如权利要求1至3任一项所述的电池的顶盖结构，其特征在于，所述柱孔的内侧壁与所述柱体的外周侧壁之间设置有间隙。
  5. 如权利要求1至3任一项所述的电池的顶盖结构，其特征在于，所述支架设置有供所述底座板放置的放置孔，当所述导电块与所述支架组装完成时，所述导电块的底座板镶嵌在所述放置孔中。
  6. 如权利要求1至3任一项所述的电池的顶盖结构，其特征在于，所述电池的顶盖结构还包括密封圈，所述密封圈的顶部与所述顶盖片抵接，所述密封圈的底部与所述底座板的顶部抵接。
  7. 如权利要求6所述的电池的顶盖结构，其特征在于，所述电池的顶盖结构还包括绝缘片，所述绝缘片的底部与所述顶盖片的顶部抵接，所述绝缘片的顶部与所述铆接片的底部抵接。
  8. 如权利要求7所述的电池的顶盖结构，其特征在于，所述绝缘片上设置有供所述柱体穿过的穿过孔，所述绝缘环的底部设置有用于包裹所述柱体的包裹圈，所述包裹圈环绕所述穿过孔布置。
  9. 如权利要求1至3任一项所述的电池的顶盖结构，其特征在于，所述顶盖片上设置有爆破片。
PCT/CN2018/081919 2017-11-17 2018-04-04 电池的顶盖结构 WO2019095612A1 (zh)

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