WO2022062431A1 - 软包纽扣电池 - Google Patents

软包纽扣电池 Download PDF

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Publication number
WO2022062431A1
WO2022062431A1 PCT/CN2021/094426 CN2021094426W WO2022062431A1 WO 2022062431 A1 WO2022062431 A1 WO 2022062431A1 CN 2021094426 W CN2021094426 W CN 2021094426W WO 2022062431 A1 WO2022062431 A1 WO 2022062431A1
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WO
WIPO (PCT)
Prior art keywords
soft
tab
insulating layer
face
button battery
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Application number
PCT/CN2021/094426
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English (en)
French (fr)
Inventor
郑文
李升高
周燕
胡大林
郭玉杰
Original Assignee
曙鹏科技（深圳）有限公司
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Publication of WO2022062431A1 publication Critical patent/WO2022062431A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • 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
    • H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
    • H01M50/136—Flexibility or foldability
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • 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 application belongs to the technical field of button batteries, and in particular relates to a soft pack button battery.
  • Button battery also known as button battery, refers to a battery with a size like a small button, generally larger in diameter and thinner in thickness. Button batteries are widely used in various micro electronic products because of their small size. In recent years, with the development of science and technology, button batteries have become more and more deeply embedded in people's lives, so the requirements for button batteries are getting higher and higher.
  • Coin cells include hard case button cells and soft case button cells.
  • the hard-shell button battery includes an upper shell, a lower shell and a soft-packed cell, the upper and lower shells are insulated and connected, the soft-packed cell is encapsulated between the upper and lower shells, and the soft-packed cell leads out the positive electrode tab and the negative electrode tab. , the positive electrode tab is welded with the upper shell, and the negative electrode tab is welded with the lower shell.
  • the hard-shell button battery is installed on the external device, the electric connection between the hard-shell button battery and the external device is realized by abutting the external device with the upper shell and the lower shell, so the connection between the hard-shell button battery and the external device is simple and easy to install.
  • the hard-shell button battery is prone to explosion and has low safety.
  • the soft-pack button battery includes a soft-pack casing and a pole core.
  • the pole core is encapsulated in the soft-pack casing.
  • a positive electrode tab and a negative electrode tab are drawn from the pole core. .
  • the soft-packed button battery When the soft-packed button battery is inflated inside the pole core, the soft-packed shell will provide a buffer space for the pole core, bulge and deform, will not explode, and be safe.
  • the positive electrode tab and the negative electrode tab need to be welded to the external device to realize the electrical connection between the soft-pack button battery and the external device.
  • the structure of the soft pack button battery Therefore, the inventor realizes that the connection between the soft-packed button battery and the external equipment is complicated, the production cost of the external equipment is increased, and the application range of the soft-packed button battery is narrow.
  • the technical problem to be solved by the present application is to provide a soft-pack button battery in view of the complicated connection between the existing soft-pack button battery and external equipment.
  • a soft-pack button battery which includes a soft-pack casing, a pole core, a first insulating layer and a second insulating layer, and the pole core is packaged in the soft-pack.
  • the pole core leads out the first pole lug and the second pole lug with different polarities, and the axial upper ends of the soft case form a first end face and a second end face respectively, and the first pole lug is formed.
  • the outer end of the second tab goes out of the soft case and bends to the first end face, and the outer end of the second tab passes out of the soft case and bends to the second end face;
  • the first insulating layer covers the side of the first tab away from the first end face, and fixes the first tab on the first end face, and the first insulating layer is provided on the first end face. There is a first through hole, and the part of the first tab facing the first through hole is exposed;
  • the second insulating layer covers the side of the second tab away from the second end face, and fixes the second tab on the second end face, and the second insulating layer is provided on the second end face. There is a second through hole, and the part of the second tab facing the second through hole is exposed.
  • a first adhesive layer is fixed on the side of the first insulating layer close to the first end face, and the first insulating layer connects the The first tab is adhesively fixed on the first end surface.
  • a second adhesive layer is fixed on the side of the second insulating layer close to the second end face, and the second insulating layer is connected to the second adhesive layer through the second adhesive layer.
  • the second tab is adhesively fixed on the second end face.
  • a first protrusion protruding toward the first insulating layer is provided at a position of the first tab facing the first through hole, and the first protrusion protrudes toward the first insulating layer. located in the first through hole.
  • a second protrusion protruding toward the second insulating layer is provided at a position of the second tab facing the second through hole, and the second protrusion protrudes toward the second insulating layer. in the second through hole.
  • the first through hole is located in the center of the first insulating layer.
  • the first insulating layer is a circular ring.
  • a side of the first insulating layer away from the first end face is provided with a first information mark.
  • the second through hole is located in the center of the second insulating layer.
  • the second insulating layer is a circular ring.
  • a second information mark is provided on a side of the second insulating layer away from the second end face.
  • a first protective layer is attached to the first end surface of the soft pack case, and the outer ends of the first tabs are located between the first protective layer and the first between insulating layers.
  • a second protective layer is attached to the second end surface of the soft pack case, and the outer ends of the second tabs are located between the second protective layer and the second protective layer. between insulating layers.
  • the soft-packed button battery further includes a sleeve, the sleeve includes a cylindrical body, a first flange extending inward from an opening of one end of the cylindrical body, and a sleeve formed by the sleeve.
  • the other end of the cylindrical main body is opened with a second flange extending inward, the first flange is overlapped on the side surface of the first insulating layer away from the first end face, the second flange Overlapped on the side surface of the second insulating layer facing away from the second end face, the cylindrical body wraps around the outer periphery of the soft package shell.
  • the angle of difference between the lead-out position of the first tab and the lead-out position of the second tab on the circumference is 0 to 180 degrees.
  • the beneficial effect of the soft pack button battery provided by the present application is that the first tab is bent to the first end face of the soft pack shell and is fixed on the first end face by the first insulating layer.
  • the exposed part of a through hole is the first electrode terminal;
  • the second tab is bent to the second end face of the soft case, and is fixed on the second end face through the second insulating layer, and the second tab passes through the second end face.
  • the exposed part of the through hole is the second electrode terminal; compared with the existing soft-pack button battery, when the soft-pack button battery of the present application is installed on an external device, the first electrode terminal and the second electrode terminal communicate with the external device through the first electrode terminal and the second electrode terminal. Abutting is used to realize the electrical connection between the soft-packed button battery and the external device.
  • the soft-pack button battery can be used in place of the hard-shell button battery, which will not explode and has higher safety, which is conducive to expanding the scope of application of the soft-pack button battery.
  • FIG. 1 is a schematic structural diagram 1 of a soft-pack button battery provided by an embodiment of the present application.
  • FIG. 2 is a second structural schematic diagram of a soft-pack button battery provided by an embodiment of the present application.
  • Fig. 3 is the exploded structure schematic diagram of Fig. 1;
  • FIG. 4 is a first structural schematic diagram of a soft-pack button battery provided by another embodiment of the present application.
  • FIG. 5 is a second structural schematic diagram of a soft-pack button battery provided by another embodiment of the present application.
  • FIG. 6 is a schematic diagram of the explosion structure of FIG. 4 .
  • Sleeve 81, cylindrical body; 82, first flange; 83, second flange.
  • the soft-pack button battery provided in the embodiment of the present application includes a soft-pack case 1, a pole core, a first insulating layer 2 and a second insulating layer 3, and the pole core is encapsulated in the soft-pack case 1, the pole core leads out the first pole lug 4 and the second pole lug 5 with different polarities, the axial upper ends of the soft case 1 respectively form the first end face 11 and the second end face 12, the first pole lug 4
  • the outer end of the second tab 5 passes through the soft case 1 and bends to the first end face 11, and the outer end of the second tab 5 passes out of the soft case 1 and bends to the second end face 12;
  • the first insulating layer 2 covers the side of the first tab 4 away from the first end face 11 , and fixes the first tab 4 on the first end face 11 , and the first insulating layer 2 is provided with a first through hole 21 , the part of the first tab 4 facing the first through hole 21 is exposed;
  • the second insulating layer 3 covers the side of the second tab 5 away from the second end face 12 , and fixes the second tab 5 on the second end face 12 , and the second insulating layer 3 is provided with a second through hole 31 , the part of the second tab 5 facing the second through hole 31 is exposed.
  • the first tab 4 is bent to the first end face 11 of the soft pack case 1 and is fixed on the first end face 11 through the first insulating layer 2 .
  • the first tab 4 The exposed part through the first through hole 21 is the first electrode terminal;
  • the second tab 5 is bent to the second end face 12 of the soft case 1 and fixed on the second end face 12 through the second insulating layer 3 , the exposed part of the second tab 5 through the second through hole 31 is the second electrode terminal;
  • the first electrode terminal and the second electrode terminal are in contact with the external device to realize the electrical connection between the soft-pack button battery and the external device, and there is no need to weld the first tab 4 and the second tab 5 to the external device.
  • the soft-pack button battery can be used in place of the hard-shell button battery, which will not explode and has higher safety, which is conducive to expanding the soft-pack button battery. scope of application.
  • the part of the first tab 4 located on the first end face 11 other than the first terminal is covered by the first insulating layer 2 to prevent this part of the first tab 4 from abutting with external equipment, thereby causing a short circuit of the soft-pack button battery, Improve the safety of soft pack button batteries.
  • the part of the second tab 5 located on the second end face 12 except for the second terminal is covered by the second insulating layer 3 to prevent this part of the second tab 5 from abutting with external devices, thereby causing a short circuit of the soft pack button battery, Improve the safety of soft pack button batteries.
  • a first adhesive layer (not shown in the figure) is fixed to the side of the first insulating layer 2 close to the first end face 11 , and the first insulating layer 2 attaches the first adhesive layer to the first adhesive layer.
  • the tabs 4 are glued and fixed on the first end face 11 . Simple structure and easy installation.
  • the first insulating layer 2 is a sticker.
  • the volume increase of the soft-pack button battery is reduced, making the soft-pack button battery lighter as a whole.
  • a second adhesive layer (not shown in the figure) is fixed on the side of the second insulating layer 3 close to the second end face 12, and the second insulating layer 3 is The tabs 5 are glued and fixed on the second end face 12 . Simple structure and easy installation.
  • the second insulating layer 3 is a sticker.
  • the volume increase of the soft-pack button battery is reduced, making the soft-pack button battery lighter as a whole.
  • the first through hole 21 can be located at any position of the first insulating layer 2 , and the position of the first through hole 21 on the first insulating layer 2 can be determined according to the installation of the first tab 4 and the external device It is determined according to the needs, so that the first tab 4 can be easily abutted with the external device.
  • the first through hole 21 is located in the center of the first insulating layer 2 . It is beneficial to expose the first tab 4 to connect with external equipment, and make the installation of the soft-pack button battery more convenient.
  • the first insulating layer 2 is annular.
  • the structure is simple and easy to process.
  • the side of the first insulating layer 2 away from the first end surface 11 is provided with an information mark, which is convenient for identifying the information of the soft-packed button battery and improves the aesthetics of the soft-packed button battery.
  • the second through hole 31 can be located at any position of the second insulating layer 3 , and the position of the second through hole 31 on the second insulating layer 3 can be determined according to the installation of the second tab 5 and the external device It is determined according to the needs, so that the second tab 5 can be easily abutted with the external device.
  • the second through hole 31 is located in the center of the second insulating layer 3 . It is beneficial to expose the second tab 5 to be connected to external devices, so that the installation of the soft-pack button battery is more convenient.
  • the second insulating layer 3 is annular.
  • the structure is simple and easy to process.
  • the side of the second insulating layer 3 away from the second end face 12 is provided with an information mark, which is convenient for identifying the information of the soft-packed button battery and improves the aesthetics of the soft-packed button battery.
  • the first protective layer 6 is attached to the first end face 11 of the soft case 1 , and the outer ends of the first tabs 4 are located between the first protective layer 6 and the first insulating layer. between layers 2.
  • the first protective layer 6 can increase the surface strength of the first end face 11 of the pouch case 1 , can protect the first end face 11 , and prevent the first end face 11 of the pouch case 1 from being scratched to cause a short circuit of the pouch button battery.
  • the first protective layer 6 has an insulating function.
  • the first protective layer 6 completely covers the first end face 11 .
  • the first end face 11 of the soft pack casing 1 can be better protected, and the use safety of the soft pack button battery can be improved.
  • the first protective layer 6 is a protective tape.
  • the structure is simple and easy to install; the volume increase of the soft-pack button battery can also be reduced, making the soft-pack button battery lighter as a whole.
  • a second protective layer 7 is attached to the second end face 12 of the soft package shell 1 , and the outer ends of the second tabs 5 are located on the second protective layer 7 and the second insulating layer. between layers 3.
  • the second protective layer 7 can increase the surface strength of the second end face 12 of the pouch case 1 , protect the second end face 12 , and prevent the second end face 12 of the pouch case 1 from being scratched to cause a short circuit of the pouch button battery.
  • the second protective layer 7 has an insulating function.
  • the second protective layer 7 completely covers the second end face 12 .
  • the second end face 12 of the soft pack case 1 can be better protected, and the use safety of the soft pack button battery can be improved.
  • the second protective layer 7 is a protective tape.
  • the structure is simple and easy to install; the volume increase of the soft-pack button battery can also be reduced, making the soft-pack button battery lighter as a whole.
  • the soft-packed button battery further includes a sleeve 8 .
  • the sleeve 8 includes a cylindrical body 81 and a first flange extending inward from an opening of one end of the cylindrical body 81 .
  • 82 and a second flange 83 extending inward from the opening of the other end of the cylindrical body 81
  • the first flange 82 is overlapped on the side surface of the first insulating layer 2 away from the first end face 11
  • the second flange 83 Overlapped on the side surface of the second insulating layer 3 away from the second end face 12
  • the cylindrical body 81 is wrapped around the outer periphery of the soft case 1 .
  • the cylindrical body 81 wraps the outer periphery of the soft case 1, the first flange 82 wraps the edge portion of the first end face 11, and the second flange 83 wraps the edge portion of the second end face 12, thereby improving the external force resistance of the soft pack button battery
  • the ability to squeeze, shock and drop allows soft-pack coin cells to be used in place of hard case coin cells.
  • the sleeve 8 is wrapped on the outside of the soft pack shell 1 by heat shrinking.
  • the connection between the sleeve 8 and the soft package shell 1 is more fit and tight.
  • the cylindrical body 81 and the first flange 82 smoothly transition. make the sleeve 8 fit more closely to the outside of the soft package shell 1 .
  • the cylindrical body 81 and the second flange 83 smoothly transition. make the sleeve 8 fit more closely to the outside of the soft package shell 1 .
  • the soft case 1 includes an outer shell 13 that wraps the pole core and a sealing edge 14 that seals the outer shell 13 ; the sealing edge 14 is bent along the axial direction of the pole core and is attached to the outer shell 13 on the outer peripheral wall; the first tab 4 goes out of the soft case 1 from the sealing edge 14 and is bent to the first end face 11; the second tab 5 passes out of the soft case 1 from the sealing edge 14, and is Bend around the sealing edge 14 towards the second end face 12 .
  • the soft package case 1 is an aluminum-plastic composite film case. Good sealing effect and high corrosion resistance.
  • the housing 13 includes a first half-shell (not shown in the figure) and a second half-shell (not shown in the figure), and the open end of the first half-shell is provided with a third extending outwardly A flange (not shown in the figure), the open end of the second half-shell is provided with a fourth flange (not shown in the figure) extending outward, and the third flange and the fourth flange are butted to form an edge seal 14.
  • the third flange and the fourth flange are heat-sealed butt-jointed to achieve a sealed connection; by arranging the outer shell 13 in a manner in which the first half-shell and the second half-shell are butted and spliced together, the pole core is easily accommodated in the outer shell 13.
  • the pole core is wound by a first pole piece (not shown in the figure), a diaphragm (not shown in the figure) and a second pole piece (not shown in the figure)
  • the first pole piece and the second pole piece have opposite polarities.
  • the difference angle between the lead-out position of the first tab 4 and the lead-out position of the second tab 5 on the circumference is 0 ⁇ 180 degrees. It can meet the requirements of pulling out the tabs in different positions.
  • the first tab 4 is provided with a first protrusion 41 protruding toward the first insulating layer 2 at the position facing the first through hole 21 .
  • a protrusion 41 is located in the first through hole 21 .
  • the first protrusion 41 is the first electrode terminal, and the first tab 4 is in contact with the external device through the first protrusion 41, which is more convenient for the first tab 4 to be connected to the external device, and the installation is quicker, and the first tab 4 is improved. Stability of electrical connection with external equipment.
  • a position of the second tab 5 facing the second through hole 31 is provided with a second protrusion 51 protruding toward the second insulating layer 3 , and the second protrusion 51 is located in the second through hole 31 .
  • the second protrusion 51 is the second electrode terminal, and the second tab 5 is in contact with the external device through the second protrusion 51 , which is more convenient for the second tab 5 to be connected to the external device, and the installation is faster and the second tab 5 is improved. Stability of electrical connection with external equipment.

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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)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

一种软包纽扣电池，包括软包壳体（1）、极芯、第一绝缘层（2）和第二绝缘层（3），极芯封装在软包壳体（1）内，极芯引出极性不同的第一极耳（4）和第二极耳（5），软包壳体（1）的轴向上两端分别形成第一端面（11）和第二端面（12），第一极耳（4）的外端穿出软包壳体（1）并向第一端面（11）弯折，第二极耳（5）的外端穿出软包壳体（1）并向第二端面（12）弯折；第一绝缘层（2）将第一极耳（4）固定在第一端面（11）上，第一绝缘层（2）上设有第一通孔（21），第一极耳（4）的正对第一通孔（21）的部分裸露；第二绝缘层（3）将第二极耳（5）固定在第二端面（12）上，第二绝缘层（3）上设有第二通孔（31），第二极耳（5）的正对第二通孔（31）的部分裸露。与现有技术相比，通过第一极耳（4）和第二极耳（5）与外部设备抵接实现电连接，软包纽扣电池可代替硬壳纽扣电池使用，安全性更高。

Description

软包纽扣电池
本申请要求于2020年09月24日提交中国专利局、申请号为202022124111.7，发明名称为“软包纽扣电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请属于纽扣电池技术领域，特别是涉及一种软包纽扣电池。
背景技术
纽扣电池也称扣式电池，是指外形尺寸像一颗小纽扣的电池，一般来说直径较大、厚度较薄。纽扣电池因体形较小，故在各种微型电子产品中得到了广泛的应用。近年来，随着科学技术的发展，纽扣电池越来越深入人们的生活，从而对纽扣电池的要求也越来越高。
纽扣电池包括硬壳纽扣电池和软包纽扣电池。硬壳纽扣电池包括上壳、下壳和软包电芯，上壳和下壳绝缘连接，软包电芯封装在上壳和下壳之间，软包电芯引出正极极耳和负极极耳，正极极耳与上壳焊接，负极极耳与下壳焊接。将硬壳纽扣电池安装到外部设备上时，通过外部设备与上壳和下壳抵接来实现硬壳纽扣电池与外部设备的电连接，因而硬壳纽扣电池与外部设备连接简单，便于安装。但当软包电芯内部发生胀气时，硬壳纽扣电池易于发生爆炸，安全性低。
软包纽扣电池包括软包壳体和极芯，极芯封装在软包壳体内，极芯上引出正极极耳和负极极耳，正极极耳和负极极耳均从软包壳体中穿出。软包纽扣电池在极芯内部发生胀气时，软包壳体会为极芯提供缓冲空间，发生鼓胀形变， 不会发生爆炸，安全性高。但是，将软包纽扣电池安装到外部设备上时，需要将正极极耳和负极极耳焊接到外部设备上，以实现软包纽扣电池与外部设备的电连接，因而需要在外部设备上匹配适用软包纽扣电池的结构。因此，发明人意识到软包纽扣电池与外部设备连接复杂，增加了外部设备的生产成本，软包纽扣电池的适用范围窄。
技术问题
本申请所要解决的技术问题是：针对现有的软包纽扣电池与外部设备连接复杂的问题，提供一种软包纽扣电池。
技术解决方案
本申请解决上述技术问题所采用的技术方案如下：提供一种软包纽扣电池，包括软包壳体、极芯、第一绝缘层和第二绝缘层，所述极芯封装在所述软包壳体内，所述极芯引出极性不同的第一极耳和第二极耳，所述软包壳体的轴向上两端分别形成第一端面和第二端面，所述第一极耳的外端穿出所述软包壳体并向所述第一端面弯折，所述第二极耳的外端穿出所述软包壳体并向所述第二端面弯折；
所述第一绝缘层覆盖在所述第一极耳的背离所述第一端面的一侧，并将所述第一极耳固定在所述第一端面上，所述第一绝缘层上设有第一通孔，所述第一极耳的正对所述第一通孔的部分裸露；
所述第二绝缘层覆盖在所述第二极耳的背离所述第二端面的一侧，并将所述第二极耳固定在所述第二端面上，所述第二绝缘层上设有第二通孔，所述第二极耳的正对所述第二通孔的部分裸露。
在本申请上述软包纽扣电池中，所述第一绝缘层的靠近所述第一端面的一侧固定有第一粘接层，所述第一绝缘层通过所述第一粘接层将所述第一极耳粘接固定在所述第一端面上。
在本申请上述软包纽扣电池中，所述第二绝缘层的靠近所述第二端面的一侧固定有第二粘接层，所述第二绝缘层通过所述第二粘接层将所述第二极耳粘接固定在所述第二端面上。
在本申请上述软包纽扣电池中，所述第一极耳的正对所述第一通孔的位置设有向所述第一绝缘层凸出的第一凸起，所述第一凸起位于所述第一通孔内。
在本申请上述软包纽扣电池中，所述第二极耳的正对所述第二通孔的位置设有向所述第二绝缘层凸出的第二凸起，所述第二凸起位于所述第二通孔内。
在本申请上述软包纽扣电池中，所述第一通孔位于所述第一绝缘层的中心。
在本申请上述软包纽扣电池中，所述第一绝缘层为圆环。
在本申请上述软包纽扣电池中，所述第一绝缘层的背离所述第一端面的一侧设置有第一信息标识。
在本申请上述软包纽扣电池中，所述第二通孔位于所述第二绝缘层的中心。
在本申请上述软包纽扣电池中，所述第二绝缘层为圆环。
在本申请上述软包纽扣电池中，所述第二绝缘层的背离所述第二端面的一侧设置有第二信息标识。
在本申请上述软包纽扣电池中，所述软包壳体的第一端面上贴附有第一保护层，所述第一极耳的外端位于所述第一保护层和所述第一绝缘层之间。
在本申请上述软包纽扣电池中，所述软包壳体的第二端面上贴附有第二保护层，所述第二极耳的外端位于所述第二保护层和所述第二绝缘层之间。
在本申请上述软包纽扣电池中，所述软包纽扣电池还包括套管，所述套管包括筒状主体、由所述筒状主体的一端开口向内伸展的第一凸缘及由所述筒状主体的另一端开口向内伸展的第二凸缘，所述第一凸缘搭接在所述第一绝缘层的背离所述第一端面的一侧表面，所述第二凸缘搭接在所述第二绝缘层的背离所述第二端面的一侧表面，所述筒状主体包裹在所述软包壳体的外周。
在本申请上述软包纽扣电池中，所述第一极耳的引出位置及所述第二极耳的引出位置在圆周上相差的角度为0～180度。
有益效果
本申请提供的软包纽扣电池的有益效果在于，第一极耳弯折至软包壳体的第一端面，并通过第一绝缘层固定在第一端面上，第一极耳的透过第一通孔裸露的部分为第一电极端子；第二极耳弯折至软包壳体的第二端面，并通过第二绝缘层固定在第二端面上，第二极耳的透过第二通孔裸露的部分为第二电极端子；与现有的软包纽扣电池相比，将本申请的软包纽扣电池安装到外部设备上时，通过第一电极端子和第二电极端子与外部设备抵接来实现软包纽扣电池与外部设备的电连接，无需将第一极耳和第二极耳焊接到外部设备上，不用在外部设备上另设匹配软包纽扣电池的结构，减少外部设备的生产成本，便于安装；软包纽扣电池可代替硬壳纽扣电池使用，不会产生爆炸，安全性更高，有利于扩大软包纽扣电池的适用范围。
附图说明
图1是本申请一实施例提供的软包纽扣电池的结构示意图一；
图2是本申请一实施例提供的软包纽扣电池的结构示意图二；
图3是图1的爆炸结构示意图；
图4是本申请另一实施例提供的软包纽扣电池的结构示意图一；
图5是本申请另一实施例提供的软包纽扣电池的结构示意图二；
图6是图4的爆炸结构示意图。
说明书中的附图标记如下：
1、软包壳体；11、第一端面；12、第二端面；13、外壳；14、封边；
2、第一绝缘层；21、第一通孔；
3、第二绝缘层；31、第二通孔；
4、第一极耳；41、第一凸起；
5、第二极耳；51、第二凸起；
6、第一保护层；7、第二保护层；
8、套管；81、筒状主体；82、第一凸缘；83、第二凸缘。
具体实施方式
为了使本申请所解决的技术问题、技术方案及有益效果更加清楚明白，以下结合附图及实施例，对本申请进行进一步的详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
实施例1
如图1至图3所示，本申请实施例提供的软包纽扣电池，包括软包壳体1、极芯、第一绝缘层2和第二绝缘层3，极芯封装在软包壳体1内，极芯引出极性不同的第一极耳4和第二极耳5，软包壳体1的轴向上两端分别形成第一端面11和第二端面12，第一极耳4的外端穿出软包壳体1并向第一端面11弯折，第二极耳5的外端穿出软包壳体1并向第二端面12弯折；
第一绝缘层2覆盖在第一极耳4的背离第一端面11的一侧，并将第一极耳4固定在第一端面11上，第一绝缘层2上设有第一通孔21，第一极耳4的正对第一通孔21的部分裸露；
第二绝缘层3覆盖在第二极耳5的背离第二端面12的一侧，并将第二极耳5固定在第二端面12上，第二绝缘层3上设有第二通孔31，第二极耳5的正对第二通孔31的部分裸露。
本申请实施例提供的软包纽扣电池，第一极耳4弯折至软包壳体1的第一端面11，并通过第一绝缘层2固定在第一端面11上，第一极耳4的透过第一通孔21裸露的部分为第一电极端子；第二极耳5弯折至软包壳体1的第二端面12，并通过第二绝缘层3固定在第二端面12上，第二极耳5的透过第二通孔31裸露的部分为第二电极端子；与现有的软包纽扣电池相比，将本申请的软包纽扣电池安装到外部设备上时，通过第一电极端子和第二电极端子与外部设备抵接 来实现软包纽扣电池与外部设备的电连接，无需将第一极耳4和第二极耳5焊接到外部设备上，不用在外部设备上另设匹配软包纽扣电池的结构，减少外部设备的生产成本，便于安装；软包纽扣电池可代替硬壳纽扣电池使用，不会产生爆炸，安全性更高，有利于扩大软包纽扣电池的适用范围。
第一极耳4的位于第一端面11的除第一端子以外的部分被第一绝缘层2覆盖，避免第一极耳4的该部分与外部设备抵接，从而导致软包纽扣电池短路，提高软包纽扣电池的使用安全性。
第二极耳5的位于第二端面12的除第二端子以外的部分被第二绝缘层3覆盖，避免第二极耳5的该部分与外部设备抵接，从而导致软包纽扣电池短路，提高软包纽扣电池的使用安全性。
在本实施例中，第一绝缘层2的靠近第一端面11的一侧固定有第一粘接层(未在图中示出)，第一绝缘层2通过第一粘接层将第一极耳4粘接固定在第一端面11上。结构简单，便于安装。
较优地，第一绝缘层2为贴纸。减少软包纽扣电池的体积增加量，使软包纽扣电池整体更加轻便。
在一实施例中，第二绝缘层3的靠近第二端面12的一侧固定有第二粘接层(未在图中示出)，第二绝缘层3通过第二粘接层将第二极耳5粘接固定在第二端面12上。结构简单，便于安装。
较优地，第二绝缘层3为贴纸。减少软包纽扣电池的体积增加量，使软包纽扣电池整体更加轻便。
在本实施例中，第一通孔21可位于第一绝缘层2的任一位置处，第一通孔21在第一绝缘层2上的位置可根据第一极耳4与外部设备的安装需求来定，便于第一极耳4与外部设备抵接。
较优地，如图3所示，第一通孔21位于第一绝缘层2的中心。有利于露出第一极耳4与外部设备连接，使软包纽扣电池的安装更加便捷。
较优地，第一绝缘层2为圆环形。结构简单，便于加工。
较优地，第一绝缘层2的背离第一端面11的一侧设置有信息标识，便于识别软包纽扣电池的信息，提高软包纽扣电池的美观性。
在本实施例中，第二通孔31可位于第二绝缘层3的任一位置处，第二通孔31在第二绝缘层3上的位置可根据第二极耳5与外部设备的安装需求来定，便于第二极耳5与外部设备抵接。
较优地，如图3所示，第二通孔31位于第二绝缘层3的中心。有利于露出第二极耳5与外部设备连接，使软包纽扣电池的安装更加便捷。
较优地，第二绝缘层3为圆环形。结构简单，便于加工。
较优地，第二绝缘层3的背离第二端面12的一侧设置有信息标识，便于识别软包纽扣电池的信息，提高软包纽扣电池的美观性。
在本实施例中，如图3所示，软包壳体1的第一端面11上贴附有第一保护层6，第一极耳4的外端位于第一保护层6和第一绝缘层2之间。第一保护层6能够增加软包壳体1的第一端面11的表面强度，能保护第一端面11，防止软包壳体1的第一端面11被划破从而造成软包纽扣电池短路。
应注意地是，第一保护层6具有绝缘作用。
较优地，第一保护层6全覆盖第一端面11。能够更好地保护软包壳体1的第一端面11，提高软包纽扣电池的使用安全性。
较优地，第一保护层6为保护胶纸。结构简单，便于安装；也能减少软包纽扣电池的体积增加量，使软包纽扣电池整体更加轻便。
在本实施例中，如图3所示，软包壳体1的第二端面12上贴附有第二保护层7，第二极耳5的外端位于第二保护层7和第二绝缘层3之间。第二保护层7能够增加软包壳体1的第二端面12的表面强度，能保护第二端面12，防止软包壳体1的第二端面12被划破从而造成软包纽扣电池短路。
应注意地是，第二保护层7具有绝缘作用。
较优地，第二保护层7全覆盖第二端面12。能够更好地保护软包壳体1的第二端面12，提高软包纽扣电池的使用安全性。
较优地，第二保护层7为保护胶纸。结构简单，便于安装；也能减少软包纽扣电池的体积增加量，使软包纽扣电池整体更加轻便。
在本实施例中，如图1至图3所示，软包纽扣电池还包括套管8，套管8包括筒状主体81、由筒状主体81的一端开口向内伸展的第一凸缘82及由筒状主体81的另一端开口向内伸展的第二凸缘83，第一凸缘82搭接在第一绝缘层2的背离第一端面11的一侧表面，第二凸缘83搭接在第二绝缘层3的背离第二端面12的一侧表面，筒状主体81包裹在软包壳体1的外周。筒状主体81包裹软包壳体1的外周，第一凸缘82包裹第一端面11的边缘部分，第二凸缘83包裹第二端面12的边缘部分，从而提高了软包纽扣电池抗外力挤压、震荡和跌落的能力，使软包纽扣电池可代替硬壳纽扣电池使用。
在本实施例中，套管8通过热收缩包裹在软包壳体1的外侧。套管8与软包壳体1的连接更加贴合、紧密。
在本实施例中，如图1和图3所示，筒状主体81与第一凸缘82平滑过渡。使套管8更加贴合在软包壳体1的外侧。
在本实施例中，如图2所示，筒状主体81与第二凸缘83平滑过渡。使套管8更加贴合在软包壳体1的外侧。
在本实施例中，如图3所示，软包壳体1包括包裹极芯的外壳13和密封外壳13的封边14；封边14沿极芯的轴向折弯，并贴合在外壳13的外周壁上；第一极耳4从封边14穿出软包壳体1，并向第一端面11弯折；第二极耳5从封边14穿出软包壳体1，并绕过封边14向第二端面12弯折。
在一实施例中，软包壳体1为铝塑复合膜壳体。密封效果好，耐腐蚀性高。
在本实施例中，外壳13包括第一半壳(未在图中示出)和第二半壳(未在图中示出)，第一半壳的开口端设置有向外延伸的第三凸缘(未在图中示出)，第二半壳的开口端设置有向外延伸的第四凸缘(未在图中示出)，第三凸缘和第四凸缘对接形成封边14。其中，第三凸缘和第四凸缘热封对接以便实现密封连接；通过将外壳13设置成第一半壳和第二半壳对接拼合的方式，便于将极芯容 纳在外壳13内。
在一实施例中，未图示地，极芯由第一极片(未在图中示出)、隔膜(未在图中示出)和第二极片(未在图中示出)卷绕成型，第一极片和第二极片极性相反，第一极片上引出第一极耳4，第二极片上引出第二极耳5。通过将极芯卷绕成型，可以提高软包纽扣电池的能量密度
在一实施例中，第一极耳4的引出位置及第二极耳5的引出位置在圆周上相差的角度为0～180度。能够满足不同位置引出极耳的要求。
实施例2
与实施例1不同的是：如图4至图6所示，第一极耳4的正对第一通孔21的位置设有向第一绝缘层2凸出的第一凸起41，第一凸起41位于第一通孔21内。第一凸起41为第一电极端子，第一极耳4通过第一凸起41与外部设备抵接，更加方便第一极耳4与外部设备连接，安装更加快捷，提高第一极耳4与外部设备电连接的稳定性。
第二极耳5的正对第二通孔31的位置设有向第二绝缘层3凸出的第二凸起51，第二凸起51位于第二通孔31内。第二凸起51为第二电极端子，第二极耳5通过第二凸起51与外部设备抵接，更加方便第二极耳5与外部设备连接，安装更加快捷，提高第二极耳5与外部设备电连接的稳定性。
其余同实施例1，这里不再赘述。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (15)

  1. 一种软包纽扣电池，其中，包括软包壳体、极芯、第一绝缘层和第二绝缘层，所述极芯封装在所述软包壳体内，所述极芯引出极性不同的第一极耳和第二极耳，所述软包壳体的轴向上两端分别形成第一端面和第二端面，所述第一极耳的外端穿出所述软包壳体并向所述第一端面弯折，所述第二极耳的外端穿出所述软包壳体并向所述第二端面弯折；
    所述第一绝缘层覆盖在所述第一极耳的背离所述第一端面的一侧，并将所述第一极耳固定在所述第一端面上，所述第一绝缘层上设有第一通孔，所述第一极耳的正对所述第一通孔的部分裸露；
    所述第二绝缘层覆盖在所述第二极耳的背离所述第二端面的一侧，并将所述第二极耳固定在所述第二端面上，所述第二绝缘层上设有第二通孔，所述第二极耳的正对所述第二通孔的部分裸露。
  2. 根据权利要求1所述的软包纽扣电池，其中，所述第一绝缘层的靠近所述第一端面的一侧固定有第一粘接层，所述第一绝缘层通过所述第一粘接层将所述第一极耳粘接固定在所述第一端面上。
  3. 根据权利要求1或2所述的软包纽扣电池，其中，所述第二绝缘层的靠近所述第二端面的一侧固定有第二粘接层，所述第二绝缘层通过所述第二粘接层将所述第二极耳粘接固定在所述第二端面上。
  4. 根据权利要求1所述的软包纽扣电池，其中，所述第一极耳的正对所述第一通孔的位置设有向所述第一绝缘层凸出的第一凸起，所述第一凸起位于所述第一通孔内。
  5. 根据权利要求1或4所述的软包纽扣电池，其中，所述第二极耳的正对所述第二通孔的位置设有向所述第二绝缘层凸出的第二凸起，所述第二凸起位于所述第二通孔内。
  6. 根据权利要求1所述的软包纽扣电池，其中，所述第一通孔位于所述第一 绝缘层的中心。
  7. 根据权利要求6所述的软包纽扣电池，其中，所述第一绝缘层为圆环。
  8. 根据权利要求6所述的软包纽扣电池，其中，所述第一绝缘层的背离所述第一端面的一侧设置有第一信息标识。
  9. 根据权利要求1或6所述的软包纽扣电池，其中，所述第二通孔位于所述第二绝缘层的中心。
  10. 根据权利要求9所述的软包纽扣电池，其中，所述第二绝缘层为圆环。
  11. 根据权利要求10所述的软包纽扣电池，其中，所述第二绝缘层的背离所述第二端面的一侧设置有第二信息标识。
  12. 根据权利要求1所述的软包纽扣电池，其中，所述软包壳体的第一端面上贴附有第一保护层，所述第一极耳的外端位于所述第一保护层和所述第一绝缘层之间。
  13. 根据权利要求1或12所述的软包纽扣电池，其中，所述软包壳体的第二端面上贴附有第二保护层，所述第二极耳的外端位于所述第二保护层和所述第二绝缘层之间。
  14. 根据权利要求1所述的软包纽扣电池，其中，所述软包纽扣电池还包括套管，所述套管包括筒状主体、由所述筒状主体的一端开口向内伸展的第一凸缘及由所述筒状主体的另一端开口向内伸展的第二凸缘，所述第一凸缘搭接在所述第一绝缘层的背离所述第一端面的一侧表面，所述第二凸缘搭接在所述第二绝缘层的背离所述第二端面的一侧表面，所述筒状主体包裹在所述软包壳体的外周。
  15. 根据权利要求1所述的软包纽扣电池，其中，所述第一极耳的引出位置及所述第二极耳的引出位置在圆周上相差的角度为0～180度。
PCT/CN2021/094426 2020-09-24 2021-05-18 软包纽扣电池 WO2022062431A1 (zh)

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