WO2021237777A1 - 纽扣电池及电子设备 - Google Patents

纽扣电池及电子设备 Download PDF

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Publication number
WO2021237777A1
WO2021237777A1 PCT/CN2020/094499 CN2020094499W WO2021237777A1 WO 2021237777 A1 WO2021237777 A1 WO 2021237777A1 CN 2020094499 W CN2020094499 W CN 2020094499W WO 2021237777 A1 WO2021237777 A1 WO 2021237777A1
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WO
WIPO (PCT)
Prior art keywords
hole
housing
button battery
explosion
area
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/CN2020/094499
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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 WO2021237777A1 publication Critical patent/WO2021237777A1/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
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/342—Non-re-sealable arrangements
    • H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
    • 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
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • 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

  • This application relates to the field of battery technology, and in particular to a button battery and electronic equipment with exhaust function.
  • buttons which are miniaturized batteries, are used more and more frequently.
  • a button battery is also called a button battery, which includes a casing and a battery body contained in the casing.
  • the button battery When the button battery is abnormally charged or discharged or the positive and negative electrodes are short-circuited, the internal temperature of the shell will rise sharply, and the gas generated by the battery body will cause the internal pressure of the shell to rise and the shell to expand. Eventually, the button battery will explode and cause a safety accident.
  • the purpose of this application is to provide a button battery and electronic equipment. In order to solve the technical problem that the gas generated inside the button battery cannot be discharged when abnormal charging and discharging occurs or the positive and negative electrodes are short-circuited.
  • a button battery including:
  • a housing the housing having an accommodating cavity
  • a battery body, the battery body is accommodated in the accommodating cavity;
  • the housing is provided with a through hole communicating with the accommodating cavity, and an explosion-proof membrane is provided in the accommodating cavity.
  • the explosion-proof membrane is used to seal the through hole. Melting to make the accommodating cavity communicate with the through hole.
  • the button battery mentioned above adopts a shell with a through hole communicating with the accommodating cavity, and the through hole is sealed by an explosion-proof membrane located in the accommodating cavity to ensure that the accommodating cavity is sealed from the outside when the button battery is in normal use; the explosion-proof membrane can It is melted at a preset temperature to ensure that the explosion-proof film melts when the button battery is abnormally charged or discharged or the positive and negative electrodes are short-circuited, and the gas in the accommodating cavity can be discharged through the through hole.
  • FIG. 1 is a schematic diagram of a spatial decomposition of a button battery in an embodiment of this application
  • Figure 2 is a top view of a button battery in an embodiment of the application
  • Figure 3 is a cross-sectional view along the line A-A in Figure 2;
  • Fig. 4 is a schematic diagram of an enlarged structure of part B in Fig. 3;
  • Fig. 5 is a schematic diagram of an enlarged structure of part C in Fig. 3;
  • Fig. 6 is a schematic diagram of an enlarged structure of part D in Fig. 3;
  • Fig. 7 is a schematic diagram of part B in another embodiment of the application.
  • Figure 8 is a cross-sectional view taken along the line E-E in Figure 7;
  • Fig. 9 is a schematic diagram of part B in another embodiment of the application.
  • Figure 10 is a top view of the through hole and the housing part near the through hole in Figure 9;
  • FIG. 11 is a schematic diagram of part B in another embodiment of the application.
  • Fig. 12 is a bottom view of the through hole in Fig. 11 and the housing part near the through hole.
  • the button battery 10 provided in the embodiment of the present application is used to provide electrical energy, especially for powering wearable electronic devices; of course, in other embodiments of the present application, the button battery 10 can also be used to power other electronic devices, here There is no unique restriction.
  • a button battery 10 includes a casing 100 and a battery body 200.
  • the battery body 200 generates electrical energy by generating electrochemical effects.
  • the housing 100 includes a first housing 110, a second housing 120, and an insulator 130 that electrically isolates the first housing 110 and the second housing 120, the first housing 110, the second housing 120, and the insulator. 130 surrounds and forms an accommodating cavity 140.
  • the battery body 200 is received in the accommodating cavity 140.
  • the first housing 110 and the second housing 120 are arranged opposite to each other along the axis of the button battery 10 to form a protection for the battery body 200.
  • the battery body 200 is provided with a first electrical connection piece 300 and a second electrical connection piece 400, and both the first electrical connection piece 300 and the second electrical connection piece 400 are electrically connected to the battery body 200 for transmitting the production of the battery body 200.
  • the first housing 110 is electrically connected to the battery body 200 through the first electrical connection member 300 to form the first pole of the button battery 10
  • the second housing 120 is electrically connected to the battery body 200 through the second electrical connection member 400 to form the button battery.
  • the second pole of 10, the first pole and the second pole are electrically opposite.
  • the first pole and the second pole are respectively a positive electrode and a negative electrode, so that the button battery 10 can provide electrical energy for the electronic device.
  • the housing 100 is provided with a through hole 150 communicating with the accommodating cavity 140, and an explosion-proof membrane 500 is provided in the accommodating cavity 140.
  • the explosion-proof membrane 500 is used to seal the through hole 150 to ensure When the button battery 10 is in normal use, the accommodating cavity 140 is sealed from the outside, that is, the explosion-proof membrane 500 covers the through hole 150 on one side of the accommodating cavity 140, and plays a role of sealing the internal and external air and moisture of the button battery 10. Further, the explosion-proof membrane 500 can be melted at a preset temperature, so that the accommodating cavity 140 and the through hole 150 are connected.
  • the button battery 10 When the button battery 10 experiences abnormal conditions such as abnormal charging and discharging or shorting of the positive and negative electrodes, the internal temperature of the button battery 10 rises sharply, and the gas generated by the battery body 200 will cause the internal pressure of the casing 100 to increase and the casing 100 to expand. When the temperature rises to a certain level, the preset temperature is reached. The explosion-proof film 500 melts due to the temperature rise, and the gas inside the button battery 10 escapes from the through hole 150 to the outside in time, so as to prevent the button battery 10 from exploding and causing safety accidents.
  • the number of through holes 150 may be one, two, or more than two.
  • the explosion-proof membrane 500 may correspond to one through hole 150 for sealing it, or the explosion-proof membrane 500 may seal multiple through holes 150 at the same time.
  • the explosion-proof film 500 is made of one or more of metals, non-metals and their compounds, and organic substances.
  • the explosion-proof membrane 500 includes a first region 510 facing the through hole 150 and a second region 520 located in the circumferential direction of the first region 510, and the explosion-proof membrane 500 is connected to the housing 100 through the second region 520.
  • the cross-section of the through hole 150 is circular. It can be understood that in other embodiments, the cross-section of the through hole 150 may also have other shapes, such as square, rectangle, diamond, triangle, or ellipse.
  • the shape of the first region 510 can correspond to the cross-section of the through hole 150, and the size can be increased or decreased in equal proportion.
  • the area of the first region 510 is 0.85S ⁇ 1.15S, where S is the through hole 150 The area of the cross section.
  • the shape of the first region 510 may also be different from the shape of the cross-section of the through hole 150, as long as it is directly facing the through hole 150.
  • the number of the through hole 150 and the explosion-proof membrane 500 is one
  • the cross section of the through hole 150 is circular
  • the shape of the first region 510 and the shape of the second region 520 are both circular.
  • the preset temperature of the first area 510 is lower than the preset temperature of the second area 520, so that when the inside of the button battery 10 is abnormally heated, the first area 510 can melt before the second area 520, and the accommodating cavity 140 It is connected to the through hole 150, so that the gas in the accommodating cavity 140 can be discharged from the through hole 150.
  • the second area 520 carries the melted liquid of the first area 510 by surface tension to prevent it from dripping onto the battery body 200.
  • the second area 520 may be connected to the housing 100 by gluing, welding, or being integrated with the housing 100 or the like.
  • the preset temperature is a nominal temperature of 55°C to 150°C.
  • the preset temperature of the first area 510 is 65°C to 100°C
  • the preset temperature of the second area 520 is 101°C to 130°C.
  • the preset temperature of the first area 510 and the second area 520 is gradually increased from inside and outside, that is, the preset temperature of the center of the first area 510 is 65°C
  • the temperature of the second area 520 is The preset temperature of the outer edge is 130°C, so that the melting starts from the center of the first area 510, so that the communication area between the accommodating cavity 140 and the through hole 150 gradually increases, and the gas discharge rate in the accommodating cavity 140 gradually increases
  • the first region 510 no longer melts, and less liquid is produced by its melting, which reduces the load of the second region 520 after the first region 510 is melted.
  • the pressure of the liquid further prevents
  • the housing 100 is provided with a containing cavity 160, and the containing cavity 160 is used for containing the melted liquid in the first area 510.
  • the temperature at the through hole 150 gradually decreases from the side of the accommodating cavity 140 outward. When the gas is discharged from the through hole 150, it will carry or push part of the melted liquid in the first area 510 to flow to the through hole 150. The melted liquid of 510 will be re-solidified after being pre-cooled.
  • the accommodating cavity 160 is used for accommodating the melted liquid in the first area 510 to prevent the melted liquid in the first area 510 from blocking the through hole 150 with gas.
  • the accommodating cavity 160 is a capillary cavity 160, and the capillary cavity 160 attracts and accommodates liquid through capillary action.
  • the capillary cavity 160 has an input end 161, and the hole wall of the through hole 150 is provided with an input end 161.
  • the input end 161 is located on the side of the hole wall close to the accommodating cavity 140.
  • the capillary cavity 160 also includes a main body 162.
  • the number of capillary cavities 160 is one, two or more than two. As shown in Figures 7 and 8, in one embodiment, the number of capillary cavities 160 is four.
  • the shape of the input end 161 is a circle, and it can be understood that in other embodiments, the shape of the input end 161 may also be a square, a rectangle, a triangle, or an ellipse.
  • the main body 162 is disposed in the housing 100 and extends outward along the radial direction of the through hole 150.
  • the main body 162 is preferably arranged at a position closer to the accommodating cavity 140 to ensure a higher temperature, so as to prevent the melted liquid in the first region 510 from solidifying and blocking the main body 162, so that subsequent liquid cannot be continuously contained.
  • the number of capillary cavities 160 is six and is in a groove shape, including an input end 161 and a main body 162.
  • the input end 161 is located at an end of the through hole 150 close to the accommodating cavity 140, and the main body 162 extends parallel to the axis of the through hole 150 and is disposed on the wall of the through hole 150.
  • the capillary cavity 160 is in the shape of a groove, which is formed by recessing the surface of the housing 100 close to the accommodating cavity 140 toward a direction away from the accommodating cavity 140.
  • the input end 161 of the capillary cavity 160 is located at an end close to the through hole 150, and the main body 162 extends radially outward along the through hole 150.
  • the first housing 110 includes a first bottom 111 and a first circumferential side wall 112 disposed on the outer periphery of the first bottom 111
  • the second housing 120 includes a second bottom 121 and a second bottom 121 disposed on the outer periphery of the second bottom 121.
  • the circumferential side wall 122, the first circumferential side wall 112 is inserted into the second circumferential side wall 122 to form an overlapping area.
  • the through hole 150 is provided in the first bottom 111. It can be understood that in other embodiments, the through hole 150 may also be provided in the second bottom 121.
  • a step 113 is formed on the first circumferential side wall 112, and the first circumferential side wall 112 includes a large end 1121 and a small end 1122 to form the step 113.
  • a crimp 123 is formed at one end of the second circumferential side wall 122 away from the second bottom 121, and the crimp 123 cooperates with the step 113 through the insulator 130 to prevent the first bottom 111 and the second bottom 121 from being relatively far away.
  • the insulator 130 is a revolving body, and its end close to the second bottom 121 is provided with an insertion groove 131, and the end of the first circumferential side wall 112 away from the first bottom 111 is inserted into the insertion groove 131, and The insertion groove 131 is pressed against the second bottom 121, an end of the insulator 130 close to the first bottom 111 has a protruding strip 132, and the crimping 123 presses the protruding strip 132 against the first circumferential side wall 112.
  • the battery body 200 may have a wound structure formed by winding a positive electrode sheet and a negative electrode sheet, or a laminated structure formed by stacking a positive electrode sheet and a negative electrode sheet.
  • the first electrical connector 300 includes a first insertion portion 310, a first connection portion 320, and a first bonding portion 330.
  • the first insertion portion 310 is connected to one of the positive electrode sheet or the negative electrode sheet of the battery body 200.
  • the first connecting portion 320 is suspended between the battery body 200 and the first casing 110, and the first attaching portion 330 is disposed on the first connecting portion 320 and is attached to the first casing 110.
  • the second electrical connector 400 includes a second insertion portion 410, a second connection portion 420, and a second bonding portion 430, and the second insertion portion 410 is connected to the other of the positive electrode sheet or the negative electrode sheet of the battery body 200
  • the second connecting portion 420 is suspended between the battery body 200 and the second casing 120, and the second attaching portion 430 is disposed on the second connecting portion 420 and is attached to the second casing 120.
  • the first electrical connector 300 and the second electrical connector 400 may also have a flexible structure, so as to electrically connect the battery body 200 with the first housing 110 and the second housing 120, respectively.
  • the through hole 150, the first affixing part 330 and the first connecting part 320 are arranged in sequence along the radial direction of the first bottom 111, so as to avoid the obstruction of the gas discharge by the first electrical connector 300, that is, the through hole 150 and the battery body Only explosion-proof membrane 500 is provided between 200.
  • the embodiment of the present application also provides an electronic device, which is powered by the aforementioned button battery 10.
  • the electronic device provided in the present application adopts the button battery 10 described above, and therefore also has the beneficial effects of the button battery 10 described above, which will not be repeated here.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Gas Exhaust Devices For Batteries (AREA)

Abstract

一种纽扣电池（10）及电子设备。一种纽扣电池（10），包括：外壳（100），外壳（100）具有容置腔（140）；及电池体（200），电池体（200）收容于容置腔（140）。外壳（100）上设置有与容置腔（140）连通的通孔（150），容置腔（140）内设置有防爆膜（500），防爆膜（500）用于将通孔（150）密封，防爆膜（500）能够在预设温度熔化，以使容置腔（140）与通孔（150）导通。上述纽扣电池（10），采用在外壳（100）上设置与容置腔（140）连通的通孔（150），并通过位于容置腔（140）内的防爆膜（500）将通孔（150）密封，以保证纽扣电池（10）正常使用时容置腔（140）与外界密封；防爆膜（500）能够在预设温度熔化，以保证纽扣电池（10）发生异常充放电或正负极短接时防爆膜（500）熔化，容置腔（140）内的气体能够由通孔（150）排出。

Description

纽扣电池及电子设备 技术领域
本申请涉及电池技术领域，尤其涉及一种具有排气功能的纽扣电池及电子设备。
 背景技术
随着电子设备，尤其是可穿戴电子设备的发展，电池被要求更加的微型化，因此，作为微型化电池的纽扣电池的使用频率越来越高。
 技术问题
纽扣电池又称扣式电池，包括外壳和收容于外壳内的电池体。当纽扣电池发生异常充放电或正负极短接时，外壳内部温度会急剧升高，电池体产生的气体会导致外壳内部压力升高、外壳膨胀，最终纽扣电池会产生爆炸发生安全事故。
因此，有必要提供一种具有排气功能的纽扣电池及电子设备。
 技术解决方案
本申请的目的在于提供一种纽扣电池及电子设备。以解决现有纽扣电池发生异常充放电或正负极短接时，其内部产生的气体无法排出的技术问题。
本申请的技术方案一如下：
一种纽扣电池，包括：
外壳，所述外壳具有容置腔；及
电池体，所述电池体收容于所述容置腔；
所述外壳上设置有与所述容置腔连通的通孔，所述容置腔内设置有防爆膜，所述防爆膜用于将所述通孔密封，所述防爆膜能够在预设温度熔化，以使所述容置腔与所述通孔导通。
本申请的技术方案二如下：
一种电子设备，该电子设备由如上述所述的纽扣电池供电。
 有益效果
本申请的有益效果在于：
上述纽扣电池，采用在外壳上设置与容置腔连通的通孔，并通过位于容置腔内的防爆膜将通孔密封，以保证纽扣电池正常使用时容置腔与外界密封；防爆膜能够在预设温度熔化，以保证纽扣电池发生异常充放电或正负极短接时防爆膜熔化，容置腔内的气体能够由通孔排出。
 附图说明
图1为本申请一个实施例中纽扣电池的空间分解示意图；
图2为本申请一个实施例中纽扣电池的俯视图；
图3为图2中A-A向剖视图；
图4为图3中B部放大结构示意图；
图5为图3中C部放大结构示意图；
图6为图3中D部放大结构示意图；
图7为本申请另一个实施例中B部的示意图；
图8为图7中E-E向剖视图；
图9为本申请另一个实施例中B部的示意图；
图10为图9中通孔及通孔附近外壳部分的俯视图；
图11为本申请另一个实施例中B部的示意图；
图12为图11中通孔及通孔附近外壳部分的仰视图。
 本发明的实施方式
下面结合附图和实施方式对本申请作进一步说明。
本申请实施例提供的纽扣电池10用于提供电能，尤其用于为可穿戴电子设备供电；当然在本申请的其他实施例中，该纽扣电池10还能够用于为其他电子设备供电，此处不作唯一限定。
请一并结合图1至图12，现对本申请提供的纽扣电池10进行说明。一种纽扣电池10，包括外壳100和电池体200。本实施例中，电池体200通过产生电化学作用产生电能。具体地，外壳100包括第一壳体110、第二壳体120以及将第一壳体110和第二壳体120电性隔绝的绝缘体130，第一壳体110、第二壳体120和绝缘体130围设形成容置腔140。电池体200收容于容置腔140。本实施例中，第一壳体110和第二壳体120沿纽扣电池10的轴线相对设置，以形成对电池体200的保护。进一步地，电池体200上设置有第一电连接件300和第二电连接件400，第一电连接件300和第二电连接件400均与电池体200电连接用于传递电池体200产生的电能。第一壳体110通过第一电连接件300与电池体200电连接以形成纽扣电池10的第一极，第二壳体120通过第二电连接件400与电池体200电连接以形成纽扣电池10的第二极，第一极和第二极电性相反。本实施例中，第一极和第二极分别为正极和负极，以使纽扣电池10能够为电子设备提供电能。
请一并结合图1至图4，外壳100上设置有与容置腔140连通的通孔150，容置腔140内设置有防爆膜500，防爆膜500用于将通孔150密封，以保证纽扣电池10正常使用时容置腔140与外界密封，即防爆膜500将通孔150位于容置腔140的一侧覆盖，起到将纽扣电池10内外部空气与水分密闭的作用。进一步地，防爆膜500能够在预设温度熔化，以使容置腔140与通孔150导通。当纽扣电池10发生异常充放电或正负极短接等异常情况时，纽扣电池10内部温度急剧升高，电池体200产生的气体会导致外壳100内部压力升高、外壳100膨胀，当内部温度升高到一定程度，即达到预设温度，此防爆膜500因为温度上升产生熔化，纽扣电池10内部气体及时从通孔150逃逸到外部，避免纽扣电池10产生爆炸发生安全事故。
进一步地，通孔150的数量可以为一个、两个或两个以上，防爆膜500可以与一个通孔150相对应，用于将其密封，或者防爆膜500也可以同时密封多个通孔150。进一步地，防爆膜500由金属、非金属及其化合物，有机物中一种或多种制成。
进一步地，防爆膜500包括正对通孔150的第一区域510以及位于第一区域510周向的第二区域520，防爆膜500通过第二区域520与外壳100连接。本实施例中，通孔150的横截面为圆形，可以理解为在其他实施例中，通孔150的横截面为还可以为其他形状，例如，正方形，长方形，菱形，三角形或椭圆形。同样的，第一区域510的形状可以与通孔150的横截面相对应，尺寸可以等比例增大或减小，第一区域510的面积为0.85S~1.15S，其中，S为通孔150的横截面的面积。同样的，第一区域510的形状也可以与通孔150的横截面的形状不相同，保证正对通孔150即可。本实施例中，通孔150和防爆膜500的数量均为1个，通孔150的横截面为圆形，第一区域510的形状和第二区域520的形状均为圆形。进一步地，第一区域510的预设温度低于第二区域520的预设温度，以使得在纽扣电池10内部异常升温时，第一区域510能够先于第二区域520熔化，容置腔140与通孔150导通，进而使得容置腔140内的气体能够从通孔150排出。第二区域520通过表面张力承载第一区域510熔化后的液体，防止其滴落到电池体200上。第二区域520可通过胶粘、焊接或与外壳100为一体设置等形式与外壳100连接。
进一步地，预设温度为55℃~150℃的标称温度。本实施例中，第一区域510的预设温度65℃~100℃，第二区域520的预设温度为101℃~130℃。可以理解为在其他实施例中，第一区域510和第二区域520由内置外的预设温度是逐渐增大的，即第一区域510中心的预设温度为65℃，第二区域520的外沿预设温度是130℃，以使熔化先从第一区域510中心开始，以使容置腔140与通孔150的连通区域逐渐增大，容置腔140内的气体排出速率逐渐增大，当气体以较低速度排出就能够达到降低纽扣电池10内部温度的作用时，第一区域510不再熔化，其熔化产生的液体较少，进而降低第二区域520承载第一区域510熔化后的液体的压力，进一步地防止其滴落到电池体200上。
请一并结合图7至图12，外壳100设置有容纳腔160，容纳腔160用于容纳第一区域510溶化后的液体。在通孔150处温度是由容置腔140一侧向外逐渐降低的，当气体由通孔150排出时会携带或推动部分第一区域510溶化后的液体向通孔150流动，第一区域510溶化后的液体预冷会重新凝固，随着气体继续排出，第一区域510溶化后的液体重新凝固后会逐渐将通孔150封住，造成气体无法排出，导致外壳100内部压力继续升高、外壳100继续膨胀，无法避免纽扣电池10产生爆炸发生安全事故。容纳腔160用于容纳第一区域510溶化后的液体，以防止第一区域510溶化后的液体随气体堵塞通孔150。具体地，容纳腔160为毛细腔160，毛细腔160通过毛细作用吸引并容纳液体。毛细腔160具有输入端161，通孔150的孔壁设置有输入端161。本实施例中，输入端161位于孔壁靠近容置腔140的一侧。毛细腔160还包括主体162。毛细腔160的数量为一个、两个或两个以上。如图7和图8所示，在一个实施例中，毛细腔160的数量为四个。输入端161的形状为圆形，可以理解为在其他实施例中，输入端161的形状还可以为正方形，长方形，三角形或椭圆形。主体162设置在外壳100内且沿通孔150的径向向外延伸。主体162优选设置在更靠近容置腔140的位置，以保证其温度较高，以防止第一区域510溶化后的液体凝固堵塞主体162，以使后续液体无法继续被容纳。如图9和图10所示，在另一个实施例中，毛细腔160的数量为六个且呈凹槽状，包括输入端161和主体162。输入端161位于通孔150靠近容置腔140的一端，主体162沿平行通孔150轴线延伸并设置在通孔150的孔壁上。如图11和图12所示，在另一个实施例中，毛细腔160呈凹槽状，其由外壳100靠近容置腔140的表面向远离容置腔140的方向凹陷形成。该毛细腔160的输入端161位于靠近通孔150一端，主体162沿通孔150径向向外延伸。
请一并结合图1至图3，图5和图6，第一壳体110和第二壳体120之间具有重合区域，重合区域通过绝缘体130连接，通孔150设置于第一壳体110和第二壳体120的非重合区域。第一壳体110包括第一底部111和设置于第一底部111外周上的第一周向侧壁112，第二壳体120包括第二底部121和设置于第二底部121外周上的第二周向侧壁122，第一周向侧壁112插设于第二周向侧壁122以形成重合区域。本实施例中，通孔150设置于第一底部111。可以理解为在其他实施例中，通孔150也可以设置于第二底部121。
进一步地，第一周向侧壁112上形成有台阶113，第一周向侧壁112包括大端1121和小端1122，以形成台阶113。第二周向侧壁122远离第二底部121的一端形成有卷边123，卷边123通过绝缘体130与台阶113配合，以防止第一底部111与第二底部121相对远离。本实施例中，绝缘体130为回转体，其靠近第二底部121的一端设置有插接槽131，第一周向侧壁112远离第一底部111的一端插设于插接槽131，并将插接槽131抵压在第二底部121，绝缘体130靠近第一底部111的一端具有凸条132，卷边123将凸条132抵压在第一周向侧壁112上。
进一步地，电池体200可以为正电极片和负电极片卷绕形成的卷绕结构，也可以为正电极片和负电极片层叠设置形成的叠层结构。
进一步地，第一电连接件300包括第一插设部310、第一连接部320和第一贴合部330，第一插设部310与电池体200的正电极片或负电极片中一者连接并将第一连接部320悬置于电池体200与第一壳体110之间，第一贴合部330设置于第一连接部320上并与第一壳体110贴合。第二电连接件400包括第二插设部410、第二连接部420和第二贴合部430，第二插设部410与电池体200的正电极片或负电极片的另一者连接并将第二连接部420悬置于电池体200与第二壳体120之间，第二贴合部430设置于第二连接部420上并与第二壳体120贴合。第一电连接件300和第二电连接件400也可以为柔性结构，以将电池体200分别与第一壳体110和第二壳体120电连接即可。
进一步地，通孔150、第一贴合部330和第一连接部320沿第一底部111径向依次设置，以避免第一电连接件300对气体排出的阻碍，即通孔150与电池体200之间只设置有防爆膜500。
本申请的实施例还提供了一种电子设备，该电子设备由上述纽扣电池10供电。本申请提供的电子设备，采用了上述纽扣电池10，因而也具备上述纽扣电池10所具备的有益效果，此处不再赘述。
以上所述的仅是本申请的实施方式，在此应当指出，对于本领域的普通技术人员来说，在不脱离本申请创造构思的前提下，还可以做出改进，但这些均属于本申请的保护范围。

Claims (9)

  1. 一种纽扣电池，包括：
    外壳，所述外壳具有容置腔；及
    电池体，所述电池体收容于所述容置腔，其特征在于，
    所述外壳上设置有与所述容置腔连通的通孔，所述容置腔内设置有防爆膜，所述防爆膜用于将所述通孔密封，所述防爆膜能够在预设温度熔化，以使所述容置腔与所述通孔导通。
  2. 根据权利要求1所述的纽扣电池，其特征在于：所述防爆膜由金属、非金属及其化合物，有机物中一种或多种制成。
  3. 根据权利要求2所述的纽扣电池，其特征在于：所述防爆膜包括正对所述通孔的第一区域以及位于所述第一区域周向的第二区域，所述防爆膜通过所述第二区域与所述外壳连接；
    所述第一区域的预设温度低于所述第二区域的预设温度。
  4. 根据权利要求3所述的纽扣电池，其特征在于：所述预设温度为55℃~150℃的标称温度。
  5. 根据权利要求4所述的纽扣电池，其特征在于：所述外壳设置有容纳腔，所述容纳腔用于容纳所述第一区域溶化后的液体。
  6. 根据权利要求5所述的纽扣电池，其特征在于：所述容纳腔为毛细腔，所述毛细腔通过毛细作用吸引并容纳所述液体。
  7. 根据权利要求6所述的纽扣电池，其特征在于：所述毛细腔具有输入端，所述通孔的孔壁设置有所述输入端。
  8. 根据权利要求7所述的纽扣电池，其特征在于：所述外壳包括第一壳体、第二壳体以及将所述第一壳体和所述第二壳体电性隔绝的绝缘体，所述第一壳体和所述第二壳体之间具有重合区域，所述重合区域通过所述绝缘体连接，所述通孔设置于所述第一壳体和所述第二壳体的非重合区域。
  9. 一种电子设备，其特征在于：所述电子设备由如权利要求1~8任一权利要求所述的纽扣电池供电。
PCT/CN2020/094499 2020-05-28 2020-06-05 纽扣电池及电子设备 Ceased WO2021237777A1 (zh)

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JPH05174805A (ja) * 1991-01-22 1993-07-13 Chung Pak Investment Ltd バッテリーの改良
CN106601960A (zh) * 2016-12-30 2017-04-26 重庆市紫建电子有限公司 一种纽扣电池及其制造方法
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