WO2021237777A1 - Batterie de type bouton et dispositif électronique - Google Patents

Batterie de type bouton et dispositif électronique 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
Authority
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
Other languages
English (en)
Chinese (zh)
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/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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.

Landscapes

  • 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

L'invention concerne une batterie de type bouton (10) et un dispositif électronique. La batterie de type bouton (10) comprend : un boîtier (100), qui est pourvu d'une cavité de réception (140) ; et un corps de batterie (200), qui est logé dans la cavité de réception (140). Le boîtier (100) est pourvu d'un trou traversant (150) qui communique avec la cavité de réception (140), l'intérieur de la cavité de réception (140) est pourvu d'une membrane antidéflagrante (500), la membrane antidéflagrante (500) est utilisée pour sceller le trou traversant (150), et la membrane antidéflagrante (500) peut fondre à une température prédéfinie de telle sorte que la cavité de réception (140) communique avec le trou traversant (150). La batterie de type bouton (10) utilise le trou traversant (150) qui communique avec la cavité de réception (140) et qui est disposé sur le boîtier (100) et au moyen de la membrane antidéflagrante (500) située à l'intérieur de la cavité de réception (140) scellant le trou traversant (150), il est garanti que la cavité de réception (140) est scellée de l'extérieur pendant l'utilisation normale de la batterie de type bouton (10). La membrane antidéflagrante (500) peut fondre à une température prédéfinie de manière à assurer que la membrane antidéflagrante (500) fond lorsqu'une charge/décharge anormale ou un court-circuit d'électrode positive/négative se produit dans la batterie de type bouton (10), et le gaz à l'intérieur de la cavité de réception (140) peut être évacué par le trou traversant (150).
PCT/CN2020/094499 2020-05-28 2020-06-05 Batterie de type bouton et dispositif électronique Ceased WO2021237777A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010467582.XA CN111525070B (zh) 2020-05-28 2020-05-28 纽扣电池及电子设备
CN202010467582.X 2020-05-28

Publications (1)

Publication Number Publication Date
WO2021237777A1 true WO2021237777A1 (fr) 2021-12-02

Family

ID=71912755

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/094499 Ceased WO2021237777A1 (fr) 2020-05-28 2020-06-05 Batterie de type bouton et dispositif électronique

Country Status (2)

Country Link
CN (1) CN111525070B (fr)
WO (1) WO2021237777A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294755A (ja) * 1985-06-24 1986-12-25 Matsushita Electric Ind Co Ltd 密閉電池
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
CN110400895A (zh) * 2019-07-30 2019-11-01 宁德时代新能源科技股份有限公司 电池模组、二次电池及其顶盖组件
WO2020009477A1 (fr) * 2018-07-06 2020-01-09 주식회사 엘지화학 Batterie secondaire et son procédé de fabrication

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597282A (en) * 1969-07-09 1971-08-03 Gulton Ind Inc Rechargeable sealed secondary battery of the button type
CN200976367Y (zh) * 2006-10-31 2007-11-14 比亚迪股份有限公司 一种电池盖帽及具有该盖帽的电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61294755A (ja) * 1985-06-24 1986-12-25 Matsushita Electric Ind Co Ltd 密閉電池
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
WO2020009477A1 (fr) * 2018-07-06 2020-01-09 주식회사 엘지화학 Batterie secondaire et son procédé de fabrication
CN110400895A (zh) * 2019-07-30 2019-11-01 宁德时代新能源科技股份有限公司 电池模组、二次电池及其顶盖组件

Also Published As

Publication number Publication date
CN111525070A (zh) 2020-08-11
CN111525070B (zh) 2021-09-24

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