WO2022000545A1 - 扣式电池 - Google Patents

扣式电池 Download PDF

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Publication number
WO2022000545A1
WO2022000545A1 PCT/CN2020/101481 CN2020101481W WO2022000545A1 WO 2022000545 A1 WO2022000545 A1 WO 2022000545A1 CN 2020101481 W CN2020101481 W CN 2020101481W WO 2022000545 A1 WO2022000545 A1 WO 2022000545A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover assembly
electrode
electrode cover
cover plate
sealing member
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2020/101481
Other languages
English (en)
French (fr)
Inventor
张健
何家勇
徐斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AAC Technologies Holdings Shenzhen Co Ltd
AAC Technologies Holdings Nanjing Co Ltd
Original Assignee
AAC Acoustic Technologies Shenzhen Co Ltd
AAC Technologies Holdings Nanjing 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 AAC Acoustic Technologies Shenzhen Co Ltd, AAC Technologies Holdings Nanjing Co Ltd filed Critical AAC Acoustic Technologies Shenzhen Co Ltd
Publication of WO2022000545A1 publication Critical patent/WO2022000545A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/109—Primary casings; Jackets or wrappings 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
    • 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
    • H01M50/166—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
    • 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
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/375—Vent means sensitive to or responsive to temperature
    • 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 invention relates to the technical field of batteries, in particular to a button battery.
  • Button batteries are also divided into two categories: chemical batteries and physical batteries, and chemical batteries are the most common. They consist of an anode (positive electrode), a cathode (negative electrode) and its electrolyte, among others. There is a sealing ring insulation between the positive electrode and the negative electrode, the sealing ring is made of nylon, and the sealing ring can prevent the leakage of the electrolyte in addition to the insulating function.
  • the temperature of the button battery in the prior art will increase during the overcharge or overdischarge process, as well as the short circuit of the positive and negative electrodes. Since the battery body is still in a sealed state, the gas inside the battery is difficult to release, resulting in the battery The internal temperature of the battery and the internal pressure of the battery will continue to rise, which may cause high temperature burns or explosions.
  • the purpose of the present invention is to provide a button battery which can improve safety performance.
  • a button-type battery the button-type battery includes a first electrode cover assembly, a second electrode cover assembly connected to the first electrode cover assembly, a sealing member, and a battery body having a positive electrode and a negative electrode, the first electrode cover assembly
  • the electrode cover assembly and the second electrode cover assembly enclose a accommodating cavity for accommodating the battery body, the battery body is installed in the accommodating cavity, and one of the positive electrode and the negative electrode of the battery body is One is connected to the first electrode cover assembly, and the other is connected to the second electrode cover assembly.
  • the second electrode cover assembly includes a second cover plate, a direction from the second cover plate to the first electrode.
  • the first electrode cover assembly and the second electrode cover assembly are sealed by the seal, and the seal covers the through hole, the When the temperature of the battery body exceeds a threshold value, the sealing member is heated and melted, and the receiving cavity communicates with the outside through the through hole.
  • the sealing member is sleeved on the second surrounding wall, and the sealing member is in contact with the first bending portion.
  • the first electrode cover assembly further includes an insulating connector connecting the first cover plate and the first surrounding wall.
  • the first enclosure wall further includes a second bent portion that is bent and extended from one end of the fixing portion close to the first cover plate toward the receiving cavity.
  • the wall is connected to the insulating connection piece through the second bent portion.
  • the insulating connector is arranged in a ring shape, and the insulating connector includes an inner side facing the first cover plate, and a side facing the inner side facing the first surrounding wall.
  • the insulating connecting piece is recessed from the inner side to form a first card slot that is snap-fitted with the first cover plate, and the insulating connecting piece is recessed from the outer side to form the first enclosure wall A second card slot that is snap-fitted, the first cover plate is snap-connected to the first card slot, and the first surrounding wall is snap-connected to the second card slot.
  • the first cover plate includes a main body and a stepped portion protruding from the outer edge of the main body, and the first cover plate is connected to the insulating connector through the stepped portion.
  • the sealing member is arranged in an annular shape, and the outer diameter of the sealing member gradually decreases from the first electrode cover assembly to the second electrode cover assembly.
  • the button battery further includes a positive electrode conductive tape and a negative electrode conductive tape, the first electrode cover assembly is connected to the positive electrode of the battery body through the positive electrode conductive tape, and the second electrode cover assembly is connected to the positive electrode of the battery body. connected with the negative electrode of the battery body through the negative electrode conductive tape;
  • the first electrode cap assembly is connected to the negative electrode of the battery body through the negative electrode conductive tape
  • the second electrode cap assembly is connected to the positive electrode of the battery body through the positive electrode conductive tape.
  • the button-type battery of the present invention passes through the second electrode cover assembly through a through hole and is sealed with a sealing member. Under normal circumstances, the button-type battery is sealed inside, which does not affect normal operation; when the temperature of the battery body exceeds the threshold, the The sealing member is heated and melted, the accommodating cavity communicates with the outside world through the through hole, and the gas inside the button battery is emitted to the outside through the through hole and the gap between the first electrode cover assembly and the second electrode cover assembly, so as to avoid the internal leakage of the button battery. The temperature continues to rise and the internal pressure of the button battery increases, causing high temperature burns or safety accidents.
  • the first electrode cover assembly and the second electrode cover assembly of the present invention are limited and matched by the first folded portion and the folded portion, thereby restricting the separation between the first electrode cover assembly and the second electrode cover assembly.
  • the connection method Simple and reliable.
  • FIG. 1 is a schematic structural diagram of a button battery according to an embodiment of the present invention.
  • Fig. 2 is a sectional view along line A-A in Fig. 1;
  • Fig. 3 is the enlarged view of B in Fig. 2;
  • FIG. 4 is an exploded view of a button battery according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a first cover plate according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of an insulating connector according to an embodiment of the present invention.
  • Fig. 7 is the sectional view along C-C line in Fig. 6;
  • FIG. 8 is a schematic structural diagram of a first surrounding wall according to an embodiment of the present invention.
  • Fig. 9 is the sectional view along D-D line in Fig. 8.
  • FIG. 10 is a schematic structural diagram of a sealing member according to an embodiment of the present invention.
  • the first electrode cover assembly 11, the first cover plate; 111, the main body; 112, the step part; 12, the first surrounding wall; part; 13, insulating connector; 131, inner side; 132, outer side; 133, first card slot; 134, second card slot;
  • an embodiment of the present invention provides a button-type battery 1 .
  • the button-type battery 1 includes a first electrode cover assembly 10 , a second electrode cover assembly 20 connected to the first electrode cover assembly 10 , and a sealing member 30 .
  • a battery body 40 having a positive electrode 41 and a negative electrode 42 the first electrode cover assembly 10 and the second electrode cover assembly 20 are enclosed to form an accommodation cavity 50 for accommodating the battery body 40, and the battery body 40 is installed in the accommodation cavity 50, And one of the positive electrode 41 and the negative electrode 42 of the battery body 40 is connected to the first electrode cover assembly 10, and the other is connected to the second electrode cover assembly 20.
  • the second electrode cover assembly 20 includes a second cover plate 21, The second enclosure wall 22 extending from the second cover plate 21 to the first electrode cover assembly 10 and the folded portion 23 folded from the second enclosure wall 22 toward one end of the first electrode cover assembly 10 toward the receiving cavity 50 , the first
  • the electrode cover assembly 10 includes a first cover plate 11 opposite to the second cover plate 21 and a first surrounding wall 12 surrounding the folded portion 23 .
  • the fixing portion 123 and the first bending portion 122 are bent and extended from the end of the fixing portion 123 away from the first cover 11 to the direction close to the receiving cavity 50 .
  • the electrode cover assembly 20 is provided with a through hole 60 communicating with the accommodating cavity 50.
  • the first electrode cover assembly 10 and the second electrode cover assembly 20 are sealed by the sealing member 30, and the sealing member 30 covers the through hole 60, and the battery body 40
  • the sealing member 30 is heated and melted, the accommodating cavity 50 communicates with the outside through the through hole 60 , and the gas inside the button battery 1 passes through the through hole 60 and between the first electrode cover assembly 10 and the second electrode cover assembly 20
  • the gap of the battery 1 is released to the outside, so as to avoid the safety accident of high temperature burns or explosion caused by the continuous increase of the internal temperature of the button battery 1 and the increase of the internal pressure of the button battery 1 .
  • the first electrode cover assembly 10 and the second electrode cover assembly 20 are limitedly matched by the first bending portion 122 and the folded portion 23 , so as to limit the distance between the first electrode cover assembly 10 and the second electrode cover assembly 20 .
  • the connection method is simple and reliable.
  • the button battery 1 further includes a positive electrode conductive tape 70 and a negative electrode conductive tape 80.
  • the first electrode cover assembly 10 is connected to the positive electrode 41 of the battery body 40 through the positive electrode conductive tape 70, and the second electrode cover assembly 20 passes through the negative electrode.
  • the conductive tape 80 is connected to the negative electrode 42 of the battery body 40 .
  • the first electrode cover assembly 10 is connected to the negative electrode 42 of the battery body 40 through the negative electrode conductive tape 80
  • the second electrode cover assembly 20 is connected to the positive electrode 41 of the battery body 40 through the positive electrode conductive tape 70 .
  • the first cover plate 11 is connected to the positive electrode 41 of the battery body 40 through the positive electrode conductive tape 70
  • the second cover plate 21 is connected to the negative electrode 42 of the battery body 40 through the negative electrode conductive tape 80 .
  • the sealing member 30 is sleeved on the second surrounding wall 22, and the sealing member 30 is in contact with the first bending portion 122. In this way, the sealing member 30 can better seal the first surrounding wall.
  • the connection gap between 12 and the second surrounding wall 22 avoids that the inside of the button battery 1 communicates with the outside through the connection gap between the first surrounding wall 12 and the second surrounding wall 22 under normal conditions.
  • the first electrode cover assembly 10 further includes an insulating connector 13 connecting the first cover plate 11 and the first surrounding wall 12, so that when the first surrounding wall 12 is connected with the second electrode cover assembly 20, the Insulated connection with the first cover plate 11 is achieved.
  • the first surrounding wall 12 further includes a second bending portion 121 that is bent and extended from the end of the fixing portion 123 close to the first cover 11 to the direction close to the receiving cavity 50.
  • a surrounding wall 12 is connected to the insulating connecting member 13 through the second bending portion 121 .
  • the insulating connector 13 is arranged in a ring shape, and the insulating connector 13 includes an inner side 131 facing the first cover plate 11, and is opposite to the inner side 131 and facing the first enclosure.
  • the insulating connector 13 is recessed from the inner side 131 to form a first slot 133 that is snap-fitted with the first cover 11, and the insulating connector 13 is recessed from the outer side 132 to form a snap fit with the first surrounding wall 12.
  • the first cover plate 11 is clamped in the first clamping groove 133, and the second bending portion 121 of the first surrounding wall 12 is clamped in the second clamping groove 134.
  • the first cover plate 11 , the insulating connector 13 and the first surrounding wall 12 are connected together in a cooperative manner, so that the first cover plate 11 , the insulating connector 13 and the first surrounding wall 12 have good connection stability. , and easy to disassemble and maintain.
  • the first electrode cover assembly 10 can also be integrally formed, which reduces the assembly process and improves the sealing performance.
  • the first cover 11 includes a main body 111 and a stepped portion 112 protruding from the outer edge of the main body 111 .
  • the sealing member 30 is arranged in a ring shape, and the outer diameter of the sealing member 30 gradually decreases from the first electrode cover assembly 10 to the direction of the second electrode cover assembly 20 .
  • the connection gap between the first surrounding wall 12 and the second surrounding wall 22 and the through hole 60 play a sealing role, and when the temperature of the battery body 40 exceeds the threshold value, the heating and melting speed of the sealing member 30 can be increased, so that it can be more.
  • the safety accident of high temperature scalding or explosion caused by the continuous increase of the internal temperature of the button battery 1 and the increase of the internal pressure of the button battery 1 can be well avoided.

Landscapes

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

Abstract

本发明提供了扣式电池，其包括第一电极盖组件、与第一电极盖组件连接的第二电极盖组件、密封件和电池体，电池体的正极和负极两者中的一者与第一电极盖组件连接，另一者与第二电极盖组件连接，第二电极盖组件包括第二围壁以及自第二围壁朝向第一电极盖组件一端向收容腔外翻折的翻折部，第一电极盖组件包括第一盖板以及围裹翻折部的第一围壁，第一围壁包括与翻折部限位配合的第一弯折部，第二电极盖组件贯穿设有与收容腔连通的通孔，第一电极盖组件和第二电极盖组件之间通过密封件密封，密封件覆盖住通孔，电池体温度超过阈值时，密封件受热熔化，扣式电池内部的气体通过通孔散发到外界，从而避免高温烫伤或者爆炸的安全事故。

Description

扣式电池 技术领域
本发明涉及电池技术领域，尤其涉及一种扣式电池。
 背景技术
纽扣电池也分为化学电池和物理电池两大类，其化学电池应用最为普遍。它们由阳极 (正极)、阴极 (负极)及其电解液等组成。正极与负极间有密封环绝缘，密封环用尼龙制成，密封环除起绝缘作用外，还能阻止电解液泄漏。
 技术问题
但是现有技术中的纽扣电池在过充电或者过放电过程，以及正负极短接等异常情况时，电池温度会升高，由于电池体仍处于密封状态，电池内部的气体难以释放，导致电池体内部温度和电池体内部压力会持续升高，可能造成高温烫伤的或者爆炸的安全事故。
因此，有必要提供一种新的扣式电池以解决上述问题。
 技术解决方案
本发明的目的在于提供一种扣式电池，其能够提高安全性能。
本发明的技术方案如下：
一种扣式电池，所述扣式电池包括第一电极盖组件、与所述第一电极盖组件连接的第二电极盖组件、密封件、以及具有正极和负极的电池体，所述第一电极盖组件和所述第二电极盖组件围合形成用于容纳所述电池体的收容腔，所述电池体安装在所述收容腔，且所述电池体的正极和负极两者中的一者与所述第一电极盖组件连接，另一者与所述第二电极盖组件连接，所述第二电极盖组件包括第二盖板、自所述第二盖板向所述第一电极盖组件延伸的第二围壁以及自所述第二围壁朝向所述第一电极盖组件一端向所述收容腔外翻折的翻折部，所述第一电极盖组件包括与所述第二盖板相对的第一盖板以及围裹所述翻折部的第一围壁，所述第一围壁包括与所述翻折部同向延伸且贴合的固定部以及自所述固定部远离所述第一盖板的一端向靠近所述收容腔方向弯折延伸的第一弯折部，所述第一弯折部与所述翻折部限位配合，所述第二围壁贯穿设有与所述收容腔连通的通孔，所述第一电极盖组件和所述第二电极盖组件之间通过所述密封件密封，且所述密封件覆盖住所述通孔，所述电池体温度超过阈值时，所述密封件受热熔化，所述收容腔通过所述通孔与外界相通。
作为一种改进方式，所述密封件套设在所述第二围壁上，且所述密封件与所述第一弯折部抵接。
作为一种改进方式，所述第一电极盖组件还包括连接所述第一盖板和所述第一围壁的绝缘连接件。
作为一种改进方式，所述第一围壁还包括自所述固定部靠近所述第一盖板的一端向靠近所述收容腔方向弯折延伸的第二弯折部，所述第一围壁通过所述第二弯折部与所述绝缘连接件连接。
作为一种改进方式，所述绝缘连接件呈环形设置，且所述绝缘连接件包括朝向所述第一盖板的内侧面、以及与所述内侧面相对设置并朝向所述第一围壁的外侧面，所述绝缘连接件从所述内侧面凹陷形成与所述第一盖板卡接配合的第一卡槽，所述绝缘连接件从所述外侧面凹陷形成与所述第一围壁卡接配合的第二卡槽，所述第一盖板卡接在所述第一卡槽，所述第一围壁卡接在所述第二卡槽。
作为一种改进方式，所述第一盖板包括本体和从所述本体外缘凸设的台阶部，所述第一盖板通过所述台阶部与所述绝缘连接件连接。
作为一种改进方式，所述密封件呈环形设置，且所述密封件的外径自所述第一电极盖组件向所述第二电极盖组件的方向逐渐减小。
作为一种改进方式，所述扣式电池还包括正极导电带和负极导电带，所述第一电极盖组件通过所述正极导电带与所述电池体的正极连接，所述第二电极盖组件通过所述负极导电带与所述电池体的负极连接；
所述第一电极盖组件通过所述负极导电带与所述电池体的负极连接，所述第二电极盖组件通过所述正极导电带与所述电池体的正极连接。
 有益效果
本发明的有益效果在于：
一、本发明的扣式电池通过在,第二电极盖组件贯穿设置通孔，并利用密封件密封，常规情况下，扣式电池内部密封，不影响正常工作；在电池体温度超过阈值时，密封件受热熔化，收容腔通过通孔与外界相通，扣式电池内部的气体通过通孔和第一电极盖组件与第二电极盖组件之间的间隙散发到外界，从而避免因扣式电池内部温度继续升高与扣式电池内部压力升高造成高温烫伤或者爆炸的安全事故。
二、本发明的第一电极盖组件和第二电极盖组件通过第一弯折部与翻折部限位配合，从而限制第一电极盖组件与第二电极盖组件之间分离，其连接方式简单可靠。
 附图说明
图1为本发明实施例的扣式电池的结构示意图；
图2为图1中沿A-A线的剖面图；
图3为图2中B的放大图；
图4为本发明实施例的扣式电池的分解图；
图5为本发明实施例的第一盖板的结构示意图；
图6为本发明实施例的绝缘连接件的结构示意图；
图7为图6中沿C-C线的剖面图；
图8为本发明实施例的第一围壁的结构示意图；
图9为图8中沿D-D线的剖面图；
图10为本发明实施例的密封件的结构示意图。
附图说明：
1、扣式电池；
10、第一电极盖组件；11、第一盖板；111、本体；112、台阶部；12、第一围壁；121、第二弯折部；122、第一弯折部；123、固定部；13、绝缘连接件；131、内侧面；132、外侧面；133、第一卡槽；134、第二卡槽；
20、第二电极盖组件；21、第二盖板；22、第二围壁；23、翻折部；
30、密封件；
40、电池体；41、正极；42、负极；
50、收容腔；
60、通孔；
70、正极导电带；
80、负极导电带。
 本发明的实施方式
下面结合附图和实施方式对本发明作进一步说明。
需要说明的是，本发明实施例中所有方向性指示（诸如上、下、左、右、前、后、内、外、顶部、底部……）仅用于解释在某一特定姿态（如附图所示）下各部件之间的相对位置关系等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
还需要说明的是，当元件被称为“固定于”或“设置于”另一个元件上时，该元件可以直接在另一个元件上或者可能同时存在居中元件。当一个元件被称为“连接”另一个元件，它可以是直接连接另一个元件或者可能同时存在居中元件。
参阅图1-图10，本发明实施例提供一种扣式电池1，扣式电池1包括第一电极盖组件10、与第一电极盖组件10连接的第二电极盖组件20、密封件30、以及具有正极41和负极42的电池体40，第一电极盖组件10和第二电极盖组件20围合形成用于容纳电池体40的收容腔50，电池体40安装在收容腔50内，且电池体40的正极41和负极42两者中的一者与第一电极盖组件10连接，另一者与第二电极盖组件20连接，第二电极盖组件20包括第二盖板21、自第二盖板21向第一电极盖组件10延伸的第二围壁22以及自第二围壁22朝向第一电极盖组件10一端向收容腔50外翻折的翻折部23，第一电极盖组件10包括与第二盖板21相对的第一盖板11以及围裹翻折部23的第一围壁12，第一围壁12包括与翻折部23同向延伸且贴合的固定部123以及自固定部123远离第一盖板11的一端向靠近收容腔50方向弯折延伸的第一弯折部122，第一弯折部122与翻折部23限位配合，第二电极盖组件20贯穿设有与收容腔50连通的通孔60，第一电极盖组件10和第二电极盖组件20之间通过密封件30密封，且密封件30覆盖住通孔60，电池体40温度超过阈值时，密封件30受热熔化，收容腔50通过通孔60与外界相通，扣式电池1内部的气体通过通孔60和第一电极盖组件10与第二电极盖组件20之间的间隙散发到外界，从而避免因扣式电池1内部温度继续升高与扣式电池1内部压力升高造成高温烫伤或者爆炸的安全事故。
本发明实施例的第一电极盖组件10和第二电极盖组件20通过第一弯折部122与翻折部23限位配合，从而限制第一电极盖组件10与第二电极盖组件20之间分离，其连接方式简单可靠。
在本实施例中，扣式电池1还包括正极导电带70和负极导电带80，第一电极盖组件10通过正极导电带70与电池体40的正极41连接，第二电极盖组件20通过负极导电带80与电池体40的负极42连接。在其他实施例中，第一电极盖组件10通过负极导电带80与电池体40的负极42连接，第二电极盖组件20通过正极导电带70与电池体40的正极41连接。
可选地，第一盖板11通过正极导电带70与电池体40的正极41连接，第二盖板21通过负极导电带80与电池体40的负极42连接。
参阅图1-图9，密封件30套设在第二围壁22上，且密封件30与第一弯折部122抵接，这样设计，密封件30能够更好地密封住第一围壁12和第二围壁22两者之间的连接间隙，避免正常情况下，扣式电池1内部通过第一围壁12和第二围壁22两者之间的连接间隙与外界连通。
参阅图1-图9，第一电极盖组件10还包括连接第一盖板11和第一围壁12的绝缘连接件13，这样第一围壁12与第二电极盖组件20连接时就可以实现与第一盖板11绝缘连接。
参阅图2-图4以及图8-图9，第一围壁12还包括自固定部123靠近第一盖板11的一端向靠近收容腔50方向弯折延伸的第二弯折部121，第一围壁12通过第二弯折部121与绝缘连接件13连接。
参阅图3，图4，图6-图7，绝缘连接件13呈环形设置，且绝缘连接件13包括朝向第一盖板11的内侧面131、以及与内侧面131相对设置并朝向第一围壁12的外侧面132，绝缘连接件13从内侧面131凹陷形成与第一盖板11卡接配合的第一卡槽133，绝缘连接件13从外侧面132凹陷形成与第一围壁12卡接配合的第二卡槽134，第一盖板11卡接在第一卡槽133，第一围壁12的第二弯折部121卡接在第二卡槽134，这样设计，通过卡接配合的方式使第一盖板11、绝缘连接件13和第一围壁12连接在一起，既使得第一盖板11、绝缘连接件13和第一围壁12三者具有良好的连接稳定性，又便于拆卸维护。需要说明的是，第一电极盖组件10也可一体成型，减少装配工序，并提高密封性能。
参阅图2，图3和图5，第一盖板11包括本体111和从本体111外缘凸设的台阶部112，台阶部112卡接在第一卡槽133内。
参阅图2-图4，以及图10，密封件30呈环形设置，且密封件30的外径自第一电极盖组件10向第二电极盖组件20的方向逐渐减小，这样设计，既能够对第一围壁12和第二围壁22两者之间的连接间隙以及通孔60起到密封作用，又能够在电池体40温度超过阈值时，提高密封件30的受热熔化速度，从而能够更好地避免因扣式电池1内部温度继续升高与扣式电池1内部压力升高造成高温烫伤或者爆炸的安全事故。
以上所述的仅是本发明的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出改进，但这些均属于本发明的保护范围。

Claims (8)

  1. 一种扣式电池，其特征在于，所述扣式电池包括第一电极盖组件、与所述第一电极盖组件连接的第二电极盖组件、密封件、以及具有正极和负极的电池体，所述第一电极盖组件和所述第二电极盖组件围合形成用于容纳所述电池体的收容腔，所述电池体安装在所述收容腔，且所述电池体的正极和负极两者中的一者与所述第一电极盖组件连接，另一者与所述第二电极盖组件连接，所述第二电极盖组件包括第二盖板、自所述第二盖板向所述第一电极盖组件延伸的第二围壁以及自所述第二围壁朝向所述第一电极盖组件一端向所述收容腔外翻折的翻折部，所述第一电极盖组件包括与所述第二盖板相对的第一盖板以及围裹所述翻折部的第一围壁，所述第一围壁包括与所述翻折部同向延伸且贴合的固定部以及自所述固定部远离所述第一盖板的一端向靠近所述收容腔方向弯折延伸的第一弯折部，所述第一弯折部与所述翻折部限位配合，所述第二围壁贯穿设有与所述收容腔连通的通孔，所述第一电极盖组件和所述第二电极盖组件之间通过所述密封件密封，且所述密封件覆盖住所述通孔，所述电池体温度超过阈值时，所述密封件受热熔化，所述收容腔通过所述通孔与外界相通。
  2. 根据权利要求1所述的扣式电池，其特征在于，所述密封件套设在所述第二围壁上，且所述密封件与所述第一弯折部抵接。
  3. 根据权利要求2所述的扣式电池，其特征在于，所述第一电极盖组件还包括连接所述第一盖板和所述第一围壁的绝缘连接件。
  4. 根据权利要求3所述的扣式电池，其特征在于，所述第一围壁还包括自所述固定部靠近所述第一盖板的一端向靠近所述收容腔方向弯折延伸的第二弯折部，所述第一围壁通过所述第二弯折部与所述绝缘连接件连接。
  5. 根据权利要求3所述的扣式电池，其特征在于，所述绝缘连接件呈环形设置，且所述绝缘连接件包括朝向所述第一盖板的内侧面、以及与所述内侧面相对设置并朝向所述第一围壁的外侧面，所述绝缘连接件从所述内侧面凹陷形成与所述第一盖板卡接配合的第一卡槽，所述绝缘连接件从所述外侧面凹陷形成与所述第一围壁卡接配合的第二卡槽，所述第一盖板卡接在所述第一卡槽，所述第一围壁卡接在所述第二卡槽。
  6. 根据权利要求3所述的扣式电池，其特征在于，所述第一盖板包括本体和从所述本体外缘凸设的台阶部，所述第一盖板通过所述台阶部与所述绝缘连接件连接。
  7. 根据权利要求3所述的扣式电池，其特征在于，所述密封件呈环形设置，且所述密封件的外径自所述第一电极盖组件向所述第二电极盖组件的方向逐渐减小。
  8. 根据权利要求1所述的扣式电池，其特征在于，所述扣式电池还包括正极导电带和负极导电带，所述第一电极盖组件通过所述正极导电带与所述电池体的正极连接，所述第二电极盖组件通过所述负极导电带与所述电池体的负极连接；
    所述第一电极盖组件通过所述负极导电带与所述电池体的负极连接，所述第二电极盖组件通过所述正极导电带与所述电池体的正极连接。
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