WO2021244618A1 - 扣式电池及其制造方法、电子设备 - Google Patents

扣式电池及其制造方法、电子设备 Download PDF

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Publication number
WO2021244618A1
WO2021244618A1 PCT/CN2021/098182 CN2021098182W WO2021244618A1 WO 2021244618 A1 WO2021244618 A1 WO 2021244618A1 CN 2021098182 W CN2021098182 W CN 2021098182W WO 2021244618 A1 WO2021244618 A1 WO 2021244618A1
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WO
WIPO (PCT)
Prior art keywords
top cover
conductive member
tab
button battery
liquid injection
Prior art date
Application number
PCT/CN2021/098182
Other languages
English (en)
French (fr)
Inventor
谢斌
彭宁
陈龙云
曾玉祥
卫志达
王永旺
王智峰
许德胜
林鸿凯
Original Assignee
珠海冠宇电池股份有限公司
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
Priority claimed from CN202010496417.7A external-priority patent/CN111613739B/zh
Priority claimed from CN202110394741.2A external-priority patent/CN112993452A/zh
Application filed by 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Priority to EP21818153.5A priority Critical patent/EP4152489A4/en
Priority to KR1020227043999A priority patent/KR20230021666A/ko
Priority to JP2022574616A priority patent/JP2023529378A/ja
Publication of WO2021244618A1 publication Critical patent/WO2021244618A1/zh
Priority to US18/061,402 priority patent/US20230106855A1/en

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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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • H01M50/636—Closing or sealing filling ports, e.g. using 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
    • H01M50/102—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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/153—Lids or covers characterised by their shape for button or coin cells
    • 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
    • H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/184—Sealing members characterised by their shape or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H01M50/555—Window-shaped terminals
    • 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
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This application relates to the field of battery technology, in particular to a button battery, a manufacturing method thereof, and electronic equipment.
  • Button battery refers to a battery whose shape and size are like a button. Generally speaking, it has a larger diameter and a thinner thickness. Because of their small size, button batteries have been widely used in various miniature electronic devices, such as wearable electronic devices and medical products.
  • the sealing performance is extremely important for the button battery.
  • the button battery in the prior art has poor sealing performance, which in turn leads to poor safety and stability of the button battery.
  • the embodiments of the present application provide a button battery, a manufacturing method thereof, and an electronic device, which have better safety and stability.
  • the first aspect of the embodiments of the present application provides a button battery, including a casing, an electrode assembly, and a sealing member.
  • the casing has a containing cavity, and the electrode assembly is located in the containing cavity.
  • the outer surface of the shell is provided with a recessed part, which is recessed to the inner side of the containing cavity, and the recessed part is located at the orifice of the filling hole and communicates with the filling hole; the sealing member is welded on the outside of the housing , To cover the recessed part and the injection hole.
  • a second aspect of the embodiments of the present application provides an electronic device, including an electronic device body and the button battery of the first aspect, and the button battery provides electrical energy for the electronic device body.
  • a third aspect of the embodiments of the present application provides a button battery, which includes: a casing, a battery cell, and a conductive element;
  • the casing includes a bottom casing and a top cover, and the top cover is sealed with the bottom casing Connected, the bottom case and the top cover are surrounded to form a accommodating cavity for accommodating the battery, the top cover is provided with a through hole communicating with the accommodating cavity, and the conductive member seals Covered on the through hole, and insulated and sealed connection with the top cover by a sealing rubber ring;
  • the conductive member is also provided with a liquid injection port for injecting electrolyte into the accommodating cavity, so The liquid injection port is covered with a sealing member, and the sealing member is in a sealed connection with the liquid injection port;
  • the battery has a first tab and a second tab, and the first tab abuts on the On the inner bottom wall of the bottom shell and welded with the inner bottom wall of the bottom shell, and the second tab is electrically connected with the conductive
  • a fourth aspect of the embodiments of the present application provides an electronic device, including an electronic device body and the button battery provided in the third aspect; the button battery provides power to the electronic device body.
  • a fifth aspect of the embodiments of the present application provides a method for manufacturing a button battery, which includes the steps of: covering a conductive member on the through hole of the top cover, so that the top cover and the conductive member are connected in an insulated and sealed manner Together; place the battery cell in the accommodating cavity of the bottom shell; use the abutting piece to abut the first tab in the battery cell on the inner bottom wall of the bottom shell, so that the first pole
  • the ear is attached to the inner bottom wall of the bottom case; the first tab is welded to the inner bottom wall of the bottom case; the second tab in the battery is electrically connected to the conductive member; the resistance is removed
  • Connecting piece inject electrolyte from the liquid injection port on the conductive member into the accommodating cavity. After the electrolyte injection is completed, cover the liquid injection port with a sealing member and connect it Sealed connection.
  • the sixth aspect of the embodiments of the present application provides a method for manufacturing a button battery, which includes the following steps: insulating and sealingly connecting a top cover and a conductive member together, and the conductive member is covered in the through hole of the top cover On; electrically connect the second tab in the battery core with the conductive member; place the battery core electrically connected with the conductive member in the housing cavity formed by the bottom shell and the top cover with the conductive member; Sealingly connect the top cover with the conductive element and the bottom shell; weld the first tab in the battery cell to the bottom shell; inject the electrolyte into the container from the liquid injection port on the conductive element In the cavity, after the electrolyte injection is completed, the liquid injection port is sealed with a sealing member and is connected to the conductive member in a sealed manner.
  • the button battery includes a casing, an electrode assembly, and a sealing member.
  • the casing has a containing cavity, the electrode assembly is located in the containing cavity, and the casing is provided with a liquid injection hole for injecting electrolyte into the containing cavity;
  • the outer surface of the shell is provided with a recessed part, which is recessed to the inside of the accommodating cavity. The recessed part is located at the opening of the liquid injection hole and communicates with the liquid injection hole; the sealing member is welded on the outside of the shell to cover the recessed part And injection hole.
  • the electrolyte remaining near the orifice of the injection hole will be It is contained in the recessed part, and will not be attached to the welding area on the outer surface of the shell, so it will not affect the welding operation of the sealing member and the shell, and will not affect the sealing performance of the welding, so the button type
  • the safety and stability of the battery are better.
  • FIG. 1 is a schematic diagram of the overall structure of a button battery provided by an embodiment of the application
  • FIG. 2 is a schematic cross-sectional view taken along the first tab of the button battery provided by an embodiment of the application;
  • FIG. 3 is a schematic cross-sectional view taken along the second tab of the button battery provided by the embodiment of the application;
  • FIG. 4 is a cross-sectional view of a cover plate assembly in a button battery provided by an embodiment of the application;
  • FIG. 5 is a schematic cross-sectional view of another structure of a button battery provided by an embodiment of the application.
  • FIG. 6 is a schematic cross-sectional view of another structure of a button battery provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of the overall structure of another structure of a button battery provided by an embodiment of the application.
  • FIG. 8 is a schematic diagram of the structure of the button battery provided in the second embodiment of the application.
  • FIG. 9 is a schematic diagram of an exploded structure of the button battery provided in the second embodiment of the application.
  • FIG. 10 is a schematic diagram of the internal structure of the first structure of the button battery provided in the second embodiment of the application.
  • FIG. 11 is a schematic diagram of the internal structure of the second structure of the button battery provided in the second embodiment of the application.
  • FIG. 12 is a schematic diagram of the internal structure of the third structure of the button battery provided in the second embodiment of the application.
  • FIG. 13 is a flowchart of a method for manufacturing a button battery provided in Embodiment 3 of this application;
  • FIG. 14 is a flowchart of another method for manufacturing the button battery provided in the fourth embodiment of the application.
  • the button battery of the present application is provided with a recessed portion at the orifice of the liquid injection hole, which functions as a retention portion for the remaining electrolyte, which can effectively prevent the electrolyte from adhering to the welding area on the outer surface of the casing, thereby avoiding interference
  • the welding of the sealing part and the shell affects.
  • FIG. 1 is a schematic diagram of the overall structure of a button battery provided by an embodiment of the application
  • FIG. 2 is a schematic cross-sectional view taken along the first tab of the button battery provided by an embodiment of the application
  • FIG. 3 is an embodiment of the application
  • the provided button battery is a schematic cross-sectional view taken along the second tab.
  • FIG. 4 is a cross-sectional view of the cover plate assembly of the button battery provided in an embodiment of the application.
  • the button cell 100 includes a casing 10, an electrode assembly 20 and a sealing member 30.
  • the casing 10 has a containing cavity 11 and the electrode assembly 20 is located In the cavity 11, the housing 10 is provided with a liquid injection hole 50 for injecting electrolyte into the containing cavity 11; a recess 60 is provided on the outer surface of the housing 10, and the recess 60 is recessed to the inner side of the containing cavity 11. 60 is located at the orifice 51 of the liquid injection hole 50 and communicates with the liquid injection hole 50; the sealing member 30 is welded to the outside of the housing 10 to cover the recess 60 and the liquid injection hole 50.
  • the recess 60 is provided at the orifice 51 of the liquid injection hole 50, and the mouth of the recess 60 is open to the outside of the casing 10. After the electrolyte is injected, it remains in the hole of the liquid injection hole 50.
  • the electrolyte near the port 51 will be contained in the recessed portion 60, and will not adhere to the welding area on the outer surface of the housing 10, so it will not affect the welding operation of the sealing member 30 and the housing 10, and will not It affects the sealing performance of welding, so the safety and stability of the button cell 100 are better.
  • the welding point of the sealing member 30 and the housing 10 is far from the center axis of the liquid injection hole 50 compared with the structure of the prior art with only the liquid injection hole 50. The distance is farther, which is more conducive to the welding operation.
  • the button battery refers to the battery whose shape is like a button. Generally, its diameter is larger and the thickness is thinner. Therefore, the button battery is the classification of the battery from the shape.
  • the housing 10 may be a metal housing, and the cross-sectional shape of the housing 10 is not limited to a circle, and may also be an ellipse, a polygon, or the like.
  • the button battery 100 is a lithium ion battery as an example for description.
  • the electrode assembly 20 may include a winding core 24, a first tab 25 and a second tab 26, and the winding core 24 includes a first pole piece 21, a second pole piece 22, And an isolation film 23 for separating the first pole piece 21 and the second pole piece 22, and the like.
  • the winding core 24 may be a cylindrical winding body and arranged in the containing cavity 11, and the containing cavity 11 also contains the electrolyte.
  • the first pole piece 21 and the second pole piece 22 are separated by the isolation membrane 23 and
  • a hollow portion 241 may be provided in the center portion of the winding core 24.
  • the end surface insulating glue 242 may also be provided on the top end and the bottom end of the winding core 24 respectively.
  • the first pole piece 21 is electrically connected to the first pole piece 25 at a position close to the winding outer circumference
  • the second pole piece 22 is electrically connected to the second pole piece 26 at a position close to the winding circumference.
  • the lugs 26 can be led out at both ends of the winding core 24, and the angle between the first and second lugs 25 and the center of the winding core 24 is greater than 0° and less than 180°, for example, 90° ° to 180 °.
  • the electrolyte can be injected into the casing 10 through a liquid injection hole 50 provided on the casing 10.
  • the recessed portion 60 is recessed to the inside of the containing cavity 11 means that the depth direction of the recessed portion 60 is directed from the outside of the containing cavity 11 to the inside;
  • the 50 communication means that the recess 60 is located at the edge of the orifice 51 of the liquid injection hole 50 and opens toward the outside of the housing 10.
  • the first pole piece 21 and the second pole piece 22 may each be coated with a battery active material.
  • the surfaces of the first tab 25 and the second tab 26 can also be attached with protective glue respectively.
  • the recessed portion 60 may surround the orifice 51 along the circumferential direction of the injection hole 50, so that the recessed portion 60 forms a sink. Hole structure, and it is easy to process by setting it as a counterbore structure.
  • the diameter of the liquid injection hole 50 can be in the range of 0.2 to 3 mm, for example, 0.5 to 1.5 mm, and the diameter of the recess 60, that is, the counterbore structure, can be in the range of 1.5 to 3.5 mm, for example, 2 to 3 mm.
  • the depth of the portion 60 ranges from 0.01 to 0.2 mm, for example, it can be 0.05 to 0.1 mm.
  • the cross-sectional shape of the recessed portion 60 and the liquid injection hole 50 can be circular or polygonal.
  • the housing 10 includes a lower housing 13 and a cover assembly 12, and the lower housing 13 and the cover assembly 12 may be jointly enclosed Accommodation cavity 11.
  • the housing 10 is provided in two detachable parts, so that the electrode assembly 20 and the like can be installed in the accommodating cavity 11.
  • the lower housing 13 may include a bottom wall 131 and a side wall 132 surrounding the bottom wall 131, and the bottom end of the side wall 132 is connected to the bottom wall 131, so that the lower housing 13 is formed into an open cover shape structure.
  • the liquid injection hole 50 can be provided at the top or bottom of the casing 10 as required, and the following description will be divided into different situations.
  • the cover plate assembly 12 includes a top cover 121 and a conductive member 122, the top cover 121 is connected to the top of the lower housing 13, and the top cover 121 is provided with a through hole 1211 ,
  • the conductive member 122 is covered on the through hole 1211, and the conductive member 122 is insulated and connected to the top cover 121; the injection hole 50 is located on the conductive member 122, and the sealing member 30 is welded on the conductive member 122 to cover the recess 60 and Injection hole 50.
  • the material of the conductive member 122 may be aluminum or aluminum alloy, for example, and the material of the top cover 121 may be metal, for example, steel or nickel.
  • the conductive member 122 and the top cover 121 are insulated and connected.
  • an insulating sealant such as a hot-melt PP (polypropylene) glue 123, may be arranged between the conductive member 122 and the top cover 121.
  • a hot-melt PP glue 123 may be arranged between the conductive member 122 and the top cover 121.
  • the conductive member 122 and the top cover 121 are connected by hot-melt PP glue 123, so that the conductive member 122 and the top cover 121 can be insulated and sealed.
  • a shell insulating glue 124 may also be attached.
  • the shell insulating glue 124 is made of a non-metallic insulating material and has a thickness of 0.02 ⁇ 0.1mm, for example, 0.03 ⁇ 0.05. mm.
  • the conductive member 122 includes a boss portion 1221, the boss portion 1221 is provided corresponding to the through hole 1211 of the top cover 121, and the boss portion 1221 is convex Outside of other parts of the conductive member 122, it extends into the receiving cavity 11 through the through hole 1211.
  • the first tab 25 and the bottom end surface of the boss portion 1221 are electrically connected.
  • the boss portion 1221 may be formed by stamping, for example, and the outer contour of the boss portion 1221 may be substantially the same as the contour of the edge portion of the through hole 1211.
  • the conductive member 122 may also include a lap portion 1222 arranged around the boss portion 1221. One end of the lap portion 1222 is connected to the boss portion 1221 and extends in a direction away from the boss portion 1221.
  • the conductive member 122 is installed At this time, the overlapping portion 1222 can be welded to the top cover 121 through the hot melt PP glue 123, and the boss portion 1221 extends into the receiving cavity 11 through the through hole 1211. It should be noted that the side surface of the boss portion 1221 is at a predetermined distance from the hole wall of the through hole to avoid contact between the conductive member 122 and the top cover 121.
  • the first tab 25 may directly contact the boss portion 1221, that is, the electrical connection between the conductive member 122 and the first tab 25 is realized.
  • the second tab 26 can be directly welded to the inner side wall of the bottom of the housing 10, and the welding point can correspond to the center position of the winding core 24.
  • first tab 25 and the boss portion 1221 can be welded to each other to form a second welding mark 126.
  • the second welding mark 126 can be located on the side of the conductive member 122 facing away from the sealing member 30, that is, in FIG. 2, the second welding mark
  • the print 126 is located on the upper surface of the conductive member 122.
  • the sealing member 30 and the conductive member 122 are welded to each other to form a first welding mark 125.
  • the first welding mark 125 may be located on the side of the conductive member 122 facing the sealing member 30. In FIG. 2, the first welding mark 125 is located on the conductive member. 122 on the bottom surface. In this way, the first welding mark 125 is located on one side of the sealing member 30, and the welding mark cannot be seen from the appearance of the sealing member 30, which can enhance the aesthetics of the button battery.
  • first welding mark 125 and the second welding mark 126 can be staggered with each other, which can improve the flatness of the entire button battery appearance and make the button battery more beautiful in appearance.
  • first welding mark 125 and the second welding mark 126 may also overlap each other. In this way, during welding, the first welding mark 125 and the second welding mark 126 can be fused with each other, which can enhance the firmness of the welding, so that the reliability of the button battery is higher.
  • the height of the protruding end surface of the boss portion 1221 relative to the bottom of the lower shell 13 is lower than the height of the bottom end surface of the top cover 121, that is, the bottom end surface of the boss portion 1221 is also protruding
  • the height h1 of the end surface relative to the bottom of the lower casing 13 is lower than the height h2 of the bottom end surface of the top cover 121 relative to the bottom of the lower casing 13.
  • the first tab 25 can be directly overlapped and welded on the bottom end surface of the boss portion 1221 without contacting the inner wall of the lower housing 13.
  • the housing insulating glue 124 is provided on the bottom end surface of the top cover 12, it can be considered that the bottom end surface of the insulating glue 124 is the bottom end surface of the top cover 121.
  • a mounting groove 1223 may be opened on the side of the conductive member 122 facing away from the boss portion 1221.
  • the mounting groove 1223 corresponds to the position of the boss portion 1221, and the liquid injection hole 50 may be located in the mounting groove 1223.
  • the bottom of the groove so that the sealing member 30 can be installed in the installation groove 1223.
  • the mounting groove 1223 is located at a position corresponding to the boss, so that the convex can be fully utilized.
  • the protruding height of the platform 1221 makes the thickness of the entire conductive member 122 more uniform.
  • FIG. 5 is a schematic cross-sectional view of another structure of a button battery provided by an embodiment of this application
  • FIG. 6 is a schematic cross-sectional view of another structure of a button battery provided by an embodiment of this application
  • FIG. 7 is an implementation of this application
  • Example provides a schematic diagram of the overall structure of another structure of the button battery.
  • the button battery 200 in this solution changes the position of the liquid injection hole on the basis of the above solution.
  • the structure of the conductive member, And the installation position of the sealing piece has also been changed accordingly.
  • the rest of the structure is similar to the structure shown in FIG. 2 and FIG. 3, and will not be repeated here.
  • the lower housing 13 includes a bottom wall 131 and a side wall 132 surrounding the bottom wall 131.
  • the bottom end of the side wall 132 is connected to the bottom wall 131.
  • the difference from the foregoing is that the liquid injection hole 70 is located on the bottom wall 131.
  • the sealing piece 71 is welded to the bottom wall 131 to cover the liquid injection hole 70.
  • the cover plate assembly 12 includes a top cover 121 and a conductive member 72, the top cover 121 is connected to the top of the side wall 132, the top cover 121 is provided with a through hole 1211, and the conductive member 72 covers the The through hole 1211, and the conductive member 72 is insulated and connected to the top cover 121;
  • the electrode assembly 20 includes a first tab 25 and a second tab 26, the first tab 25 and the conductive member 72 are welded and connected, and the second tab 26 and The bottom wall 131 is welded and connected.
  • the welding point A of the sealing piece 71 and the bottom wall 131 is located on the bottom wall 131 close to the sealing piece 71, and the bottom wall 131 and the second tab 26
  • the welding point B can be located at another position to avoid the position of the welding point A to avoid overlapping of the two welding points, which can increase the flatness of the appearance of the entire button cell.
  • the first tab 25 it can be directly welded to the conductive member 72.
  • a bottom installation groove 74 may be opened on the outer surface of the bottom wall 131, and the liquid injection hole 70 may be located at the bottom of the groove of the bottom installation 74.
  • the bottom mounting groove 74 is configured to be able to receive the sealing member 71 so that the sealing member 71 can be installed in the bottom mounting groove 74.
  • the bottom installation groove 74 that can accommodate the sealing member 71 is provided, so that the sealing member 71 does not protrude from the surface of the button battery 100, and the appearance is better.
  • the electrolyte is injected into the hollow part of the core from the injection hole, and the concave part is used to store the residual electrolyte.
  • the sealing member covers the injection hole and the concave part, and passes through the circumference. Lap and weld to seal, of course, the sealing member and the liquid injection hole can be arranged approximately coaxially.
  • the button battery includes a casing, an electrode assembly, and a sealing member.
  • the casing has a containing cavity, the electrode assembly is located in the containing cavity, and the casing is provided with a liquid injection hole for injecting electrolyte into the containing cavity;
  • the outer surface of the shell is provided with a recessed part, which is recessed to the inside of the accommodating cavity. The recessed part is located at the opening of the liquid injection hole and communicates with the liquid injection hole; the sealing member is welded on the outside of the shell to cover the recessed part And injection hole.
  • the electrolyte remaining near the orifice of the injection hole will be It is contained in the recess and will not be attached to the outer surface of the shell, so it will not affect the welding operation of the sealing member and the shell, and will not affect the sealing performance of the welding, so the safety of the button battery Both properties and stability are better.
  • the present application also provides an electronic device, including: an electronic device body and a button battery, and the button battery provides electrical energy for the electronic device body.
  • the structure of the button battery in the electronic device provided by the present application is the same as the structure of the button battery described above, and can bring the same or similar technical effects, and will not be repeated here.
  • the sealability is extremely important for the button battery.
  • the electrolyte is first injected into the containing cavity where the battery cell is placed, and then the conductive member The conductive element is riveted with the through hole through the through hole on the shell, and an insulating sealing rubber ring is arranged between the conductive element and the through hole.
  • the shell will oscillate, The electrolyte in the cavity will splash to the sealing rubber ring, causing partial failure of the sealing rubber ring, resulting in poor sealing.
  • the conductive member is covered on the through hole of the top cover, the top cover and the conductive member are insulated and sealed together by a sealing rubber ring, and the battery core is placed In the accommodating cavity of the bottom shell, the first tab on the battery core is welded to the inner bottom wall of the bottom shell, and then the top cover with the conductive element is connected to the bottom shell in a sealed manner, and the second tab on the battery core
  • the tabs are electrically connected to the conductive parts, and finally the top cover with the conductive parts is sealed and connected to the bottom shell, and the electrolyte is injected into the containing cavity from the liquid injection port on the conductive parts.
  • the sealing part The cap is on the liquid injection port, and the sealing member and the liquid injection port are sealed and connected by bonding or welding, thereby improving the sealing performance of the button battery.
  • the button battery provided by the embodiment of the present application includes: a casing 10, a battery core 20 located in an accommodating cavity 1011 of the casing 10, and an electric core 20 arranged on the casing 10 and insulated and connected to the casing 10
  • the conductive member 30 is provided with a liquid injection port 301 for injecting electrolyte into the accommodating cavity 1011 and a sealing member 40 that covers the liquid injection port 301.
  • the sealing member 40 is connected to the liquid injection port 301 in a sealed manner, and the battery 20
  • the first tab 201 and the housing 10 are electrically connected by welding or the like.
  • the second tab 202 and the conductive member 30 are also electrically connected by welding or bonding.
  • the housing 10 and the conductive member 30 are respectively electrically connected to the electronic device, so that the battery core 20 provides electrical energy to the electronic device through the housing 10 and the conductive member 30.
  • the housing 10 includes a bottom case 101 and a top cover 102.
  • the bottom case 101 is provided with a groove extending toward the bottom wall of the bottom case 101.
  • the groove forms a groove for accommodating the battery core 20.
  • the accommodating cavity 1011 and the top cover 102 are sealed at the opening communicating with the accommodating cavity 1011, so that the bottom shell 101 and the top cover 102 surround the housing 10 with the accommodating cavity 1011.
  • the top cover 102 and the bottom case 101 are connected in a sealed manner, for example, welding is performed between the top cover 102 and the bottom case 101.
  • the shape of the cross section of the housing 10 can be any shape such as a circle, an ellipse, a polygon, etc., which is not limited in this embodiment.
  • the housing 10 and the conductive member 30 can be made of stainless steel, copper, iron, and other metal materials.
  • the top cover 102 is provided with a through hole 1021 to make the top cover 102 form a ring structure, the conductive member 30 is covered on the through hole 1021, and a sealing rubber ring 50 is provided between the conductive member 30 and the through hole 1021, and a sealant
  • the ring 50 insulates and seals the connection between the conductive member 30 and the through hole 1021, that is, the conductive member 30 is bonded to the edge of the through hole 1021 through the sealing rubber ring 50, and the through hole 1021 on the top cover 102 is covered .
  • the shape of the through hole 1021 may be circular, elliptical, or multi-deformed.
  • the conductive member 30 can be bonded to the top cover 102 through the sealing rubber ring 50 by heating and pressurizing. In this way, the adhesion of the sealing rubber ring 50 can be improved. The reliability of the connection, thereby improving the sealing performance of the connection between the conductive member 30 and the top cover 102.
  • the conductive member 30 may protrude from the surface of the top cover 102, or a receiving groove 1022 for placing the conductive member may be provided on the top cover 102, and the conductive member 30 is located in the receiving groove 1022, as shown in FIG. 12, and The upper surface of the conductive member 30 is flush with the upper surface of the top cover 102.
  • the sealing rubber ring 50 will overflow glue when heated and pressurized.
  • the overflowing glue is located in the accommodating groove 1022 and will not overflow the surface of the top cover 102. In this way, the surface of the top cover 102 is relatively flat, and the overall structure of the button battery is more compact, which improves the overall aesthetics of the button battery.
  • the through hole 1021 is a circular hole
  • the conductive member 30 is disc-shaped
  • the diameter of the through hole 1021 is smaller than the diameter of the conductive member 30. Therefore, the edge of the conductive member 30 and the edge of the through hole 1021 are at least radially A part of the through hole 1021 and the conductive member 30 are laminated, and the through hole 1021 and the conductive member 30 are tightly bonded through the sealing rubber ring 50 by heating and pressing.
  • the sealing rubber ring 50 under high heat and high pressure can make the through hole 1021 and the conductive member 30 The connection is tighter, thereby improving the sealability of the button cell.
  • the conductive member 30 and the through hole 1021 have a single side along the radial direction.
  • the laminated portion is greater than or equal to 0.3 mm, so that the sealing area between the conductive member 30 and the through hole 1021 is increased, thereby improving the sealing performance between the conductive member 30 and the through hole 1021.
  • the conductive member 30 is further provided with an extension portion 303 penetrating through the through hole 1021.
  • the conductive member 30 is formed as a T-shaped conductive member 30, so that the extension portion 303 is connected to the conductive member 30.
  • the hole walls of the hole 1021 are sealed and connected by a sealing rubber ring 50, which further increases the sealing area between the conductive member 30 and the through hole 1021, thereby improving the sealing performance between the conductive member 30 and the through hole 1021.
  • the sealing rubber ring 50 can be made of a soluble material to improve the corrosion resistance and sealing performance of the sealing rubber ring 50 against electrolyte.
  • the sealing rubber ring 50 is ring-shaped.
  • the outer edge of the sealing rubber ring 50 overflows the junction between the conductive member 30 and the top cover 102, and the inner part of the sealing rubber ring 50 The edge overflows at the junction between the sealing rubber ring 50 and the edge of the through hole 1021 on the top cover 102, so that the reliability of the connection between the sealing rubber ring 50 and the top cover 102 can be ensured.
  • the conductive member 30 is also provided with a liquid injection port 301 for injecting electrolyte into the accommodating cavity 1011.
  • the liquid injection port 301 can be circular, quadrilateral, Arbitrary shapes such as polygons.
  • the liquid injection port 301 is arranged concentrically with the conductive member 30, and the conductive member 30 is arranged concentrically with the accommodating cavity 1011 in the housing 10 for containing the discharge core 20.
  • the liquid injection port 301 is provided with a counterbore 302 at one end away from the accommodating cavity 1011, and the diameter of the counterbore 302 is larger than the liquid injection port 301.
  • the counterbore 302 communicates with the liquid injection port 301 and is arranged coaxially.
  • the shape of the counterbore 302 is the same as the shape of the liquid injection port 301, that is, when the shape of the liquid injection port 301 is circular, the shape of the counterbore 302 is also circular.
  • the depth of the counterbore 302 may be Between 0.01 ⁇ 0.5mm.
  • the liquid injection port 301 is covered with a sealing member 40, that is, the sealing member 40 is located in the counterbore 302. Since the depth of the counterbore 302 is small, the sealing member 40 may have a sheet structure and be located in the counterbore 302 to cover The liquid injection port 301, in order to improve the sealing performance, the sealing member 40 and the liquid injection port 301 are connected to each other in a sealed manner. After the electrolyte is injected into 1011, the joint between the sealing member 40 and the counterbore 302 is welded on the outside of the casing 10 to improve the sealing performance.
  • the sealing member 40 may be a sealing nail, the sealing nail is located in the counterbore 302, and the joint between the sealing nail and the counterbore 302 is welded together.
  • the diameter of the counterbore 302 is larger than the diameter of the cap of the sealing nail, and the sealing nail is located in the counterbore 302.
  • the welding device can weld the joint between the sealing nail and the conductive member 30 from the counterbore 302.
  • the laser beam of the laser welding device can extend into the counterbore 302 to seal the seal.
  • the nail and the conductive member 30 are welded together.
  • the sealing member 40 may also be located in the counterbore 302, and be bonded to the counterbore by a sealing rubber ring or the like, so as to simplify the operation process.
  • the battery core 20 is a wound battery cell 20.
  • the wound battery cell 20 includes a first pole piece, a second pole piece, and a combination of the first pole piece and the second pole piece.
  • the first pole piece is provided with a first pole piece 201
  • the first pole piece 201 can be set on the first pole piece by welding
  • the second pole piece is provided with a second pole piece 202
  • the second pole piece is provided with a second pole piece 202
  • the ear 202 can be arranged on the second pole piece by welding; during the winding process, the first pole piece, the second pole piece and the diaphragm are wound layer by layer in the same direction from the beginning of the winding and finally form a wound cell 20.
  • the first pole piece of the battery cell 20 may be a positive pole piece
  • the second pole piece may be a negative pole piece.
  • the second tab 202 on the pole piece is the negative tab.
  • the battery core 20 is contained in the accommodating cavity 1011, and the positive tab and the inner bottom wall of the bottom case 101 are electrically connected by welding to make the bottom case 101 It is formed as the positive electrode of the button battery, and the negative lug is electrically connected to the conductive member 30 so that the conductive member 30 is formed as the negative electrode of the button battery.
  • the bottom case 101 is connected to the positive electrode of the electronic device Conduction
  • the conductive member 30 is connected to the negative electrode of the electronic device to conduct, so that the battery core 20 supplies power to the electronic device.
  • the first pole piece of the battery cell 20 may be a negative pole piece, and the second pole piece may be a positive pole piece.
  • the first pole piece 201 provided on the first pole piece is a negative pole piece
  • the The second tab 202 is a positive tab.
  • the battery cell 20 is contained in the accommodating cavity 1011, and the negative tab is electrically connected to the bottom shell 101 by welding so that the bottom shell 101 is formed as the negative pole of the button battery.
  • the positive lug is electrically connected to the conductive member 30 so that the conductive member 30 is formed as the positive electrode of the button battery.
  • the bottom case 101 is connected to the negative electrode of the electronic device and the conductive member 30 It is connected to the positive pole of the electronic device to conduct, so that the battery core 20 supplies power to the electronic device.
  • the second tab 202 is electrically connected to the end of the extension 303 of the conductive member 30 extending into the accommodating cavity 1011, so that the contact area between the second tab 202 and the conductive member 30 can be increased , Thereby improving the reliability of the electrical connection.
  • the end of the extension portion 303 facing the containing cavity 1011 exceeds the inner wall of the top cover 102 In this way, when the second tab 202 is connected to the end surface of the extension 303, a gap is formed between the second tab 202 and the inner wall of the top cover 102, or insulation is provided between the inner wall of the top cover 102 and the second tab 202. Layer to improve the reliability of the electrical connection between the second tab 202 and the conductive member 30.
  • first tab 201 and the top cover 102 in the housing 10 are electrically connected by welding or bonding.
  • an insulating layer may be provided on both the first tab 201 and the second tab 202 in the circumferential direction, and the first tab 201 Or the second tab 202 only exposes the part that is electrically connected to the bottom case 101 or the conductive member 30.
  • the wound cell 20 may form a cell cavity 203 at the center position during winding.
  • the cell cavity 203 and the liquid injection port 301 are arranged concentrically In this way, when the electrolyte is injected into the accommodating cavity 1011, the pole pieces and diaphragm in the cell 20 will not block the injection of the electrolyte, which improves the efficiency of electrolyte injection, thereby improving the production efficiency of the button cell .
  • the abutment 60 can also be inserted into the cell cavity 203 from the liquid injection port 301, and the abutment 60 can be a columnar structure, for example, a cylindrical structure, a prismatic structure, etc. It can be composed of one column, or it can be composed of two or more columns connected end to end in sequence.
  • the second end of the abutting member 60 can extend out of the top cover 102 of the housing 10, when the first tab 201 in the button battery is welded to the inner bottom wall of the bottom housing 101 , And after the top cover 102 with the conductive member 30 and the bottom case 101 are sealed and connected, the abutting member 60 can be taken out from the cell cavity 203 along the liquid injection port 301.
  • the cell 20 with the first tab 201 and the second tab 202 is first placed in the accommodating cavity 1011 of the bottom case 101, and facing the cell cavity 203 of the cell 20.
  • the top cover 102 and the conductive member 30 are insulated and sealed together by a sealing rubber ring 50 by heating and pressing, and then the battery cell 20 is placed in the accommodating cavity 1011 in the bottom case 101, the abutting member 60 is inserted into the cell cavity 203, the first end of the abutting member 60 abuts on the first tab 201, and the first end of the abutting member 60
  • the two ends extend out of the top cover 102, and the first tab 201 is attached to the inner bottom wall of the bottom shell 101 by squeezing the abutting member 60, and the first tab 201 and the bottom shell 101 are connected by welding equipment.
  • the top cover 102 with the conductive member 30 is sealed on the bottom case 101, and the bottom case 101 and the top cover 102 are sealed and connected by bonding or welding, and the second tab on the battery core 20 202 is electrically connected to the conductive member 30, the abutting member 60 is taken out, and the electrolyte is injected into the accommodating cavity from the liquid injection port 301.
  • the sealing member 40 is sealed on the liquid injection port 301 , And sealingly connect the sealing member 40 and the liquid injection port 301 by bonding or welding.
  • the conductive member is sealed on the through hole of the top cover, the top cover and the conductive member are insulated and sealed together by a sealing rubber ring, and the battery core is placed in the housing of the bottom case
  • the first tab on the cell is welded to the inner bottom wall of the bottom shell, and then the top cover with the conductive element is connected to the bottom shell in a sealed manner, and the second tab on the cell is electrically connected to the conductive element.
  • An embodiment of the present application also provides an electronic device, including an electronic device body and the button battery provided in the first embodiment, and the button battery provides electrical energy for the electronic device body.
  • the electronic device provided in this application includes an electronic device body and a button battery that provides power to the electronic device body.
  • the button battery is covered by a conductive member on the through hole of the top cover, and the top cover and the conductive member are insulated by a sealing rubber ring And connected together in a sealed manner, place the battery core in the accommodating cavity of the bottom case, make the first tab on the battery core and the inner bottom wall of the bottom case be welded, and then connect the top cover with the conductive element to the bottom case Seal the connection, and electrically connect the second tab on the cell with the conductive element, and finally connect the top cover with the conductive element and the bottom shell in a sealed manner, and inject the electrolyte from the liquid injection port on the conductive element into the accommodating cavity Inside, after the electrolyte injection is completed, the sealing member is sealed on the liquid injection port, and the sealing member and the liquid injection port are hermetically connected by bonding or welding, thereby improving the tightness of the button battery.
  • an embodiment of the present application also provides a method for manufacturing a button battery, which includes the following steps:
  • S101 Cover the conductive member on the through hole of the top cover, so that the top cover and the conductive member are connected together in an insulated and airtight manner;
  • a sealing rubber ring is arranged between the top cover and the conductive part.
  • the top cover and the conductive part are squeezed and connected together by heating and pressing first.
  • the sealing rubber ring is squeezed and deformed to improve the top cover and the conductive part The tightness between the pieces.
  • S105 Electrically connect the second tab in the battery cell with the conductive element.
  • S106 Remove the abutting part, and inject electrolyte from the liquid injection port on the conductive part into the accommodating cavity. After the electrolyte injection is completed, cover the liquid injection port with the sealing part, and seal the connection with the conductive part.
  • the second tab in the battery core and the conductive element may be electrically connected.
  • top cover and the conductive part are insulated and sealed together by a sealing rubber ring, it also includes:
  • passivation treatment refers to the process of metal being oxidized by strong oxidant or electrochemical method to make the surface become inactive, that is, passivation. It transforms the metal surface into a state that is not easy to be oxidized, and delays the corrosion of the metal. Speed method.
  • the first tab in the battery cell before welding the first tab in the battery cell to the bottom shell, it also includes:
  • the abutment piece placed in the cavity of the cell is squeezed from the liquid injection port; the abutment piece squeezes the first tab in the cell to fit the inner bottom wall of the bottom shell.
  • the conductive member is covered on the through hole of the top cover, the top cover and the conductive member are insulated and sealed together by a sealing rubber ring, and the battery core is placed in the bottom case
  • the first tab on the cell is welded to the inner bottom wall of the bottom shell, and then the top cover with the conductive element is connected to the bottom shell in a sealed manner, and the second tab on the cell is connected to the bottom shell.
  • the conductive part is electrically connected, and finally the electrolyte is injected from the liquid injection port on the conductive part into the accommodating cavity.
  • the sealing part is sealed on the liquid injection port, and the sealing part and the liquid injection port are sealed and connected , Thereby improving the sealability of the button battery.
  • an embodiment of the present application also provides another method for manufacturing a button battery, which includes the following steps:
  • S06 Inject electrolyte into the accommodating cavity from the liquid injection port on the conductive member. After the electrolyte is injected, cover the liquid injection port with the sealing member and seal the connection with the conductive member.
  • the top cover and the conductive member are insulated and sealed together by a sealing rubber ring by heating and pressing, and the conductive member and the second The two-pole lug is electrically connected.
  • the battery core electrically connected with the conductive element through the second lug is placed in the accommodating cavity, the top cover with the conductive element is sealed on the bottom shell, and the bottom is bonded or welded
  • the shell and the top cover are in a sealed connection, and the abutment piece can be inserted from the liquid injection port, so that the abutment piece abuts on the first lug, and the first lug is attached to the inner bottom wall of the bottom shell through welding equipment Weld the first tab on the bottom shell, then remove the abutment piece from the liquid injection port, cover the sealing piece on the liquid injection port, and bond the sealing piece to the conductive piece by welding or bonding Among them, in order to improve the sealing performance, it is also possible to add a sealing member at the sealing member and the liquid injection port, thereby improving the sealing performance of the button battery.
  • the first lug and the inner bottom wall of the bottom shell are welded first, when the bottom shell and the top cover are welded later, the first lug and the bottom shell will shake due to welding, which will make the first lug and the inner bottom wall of the bottom shell The welding between them is loosened, which leads to the problem of low reliability of the electrical connection between the first tab and the bottom shell.
  • the bottom shell and the top cover are welded first, and then the first tab and the inner bottom wall of the bottom shell are welded, which can improve the welding reliability of the first tab and the bottom shell, thereby improving the first tab and the bottom. Reliability of the electrical connection between the shells.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Filling, Topping-Up Batteries (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

本申请提供一种扣式电池及其制造方法、电子设备，扣式电池包括壳体、电极组件和封口件，壳体内具有容纳腔，电极组件位于容纳腔内，壳体上设有用于向容纳腔中注入电解液的注液孔；壳体的外表面上设有凹陷部，凹陷部凹向容纳腔内侧，凹陷部位于注液孔的孔口处，并与注液孔连通；封口件焊接在壳体外侧，以封盖凹陷部和注液孔。本申请的扣式电池及其制造方法、电子设备安全性、可靠性较高。

Description

扣式电池及其制造方法、电子设备
本申请要求于2021年04月13日提交中国专利局、申请号为202110394741.2，申请名称为“扣式电池及电子设备”的中国专利申请；2020年06月03日提交中国专利局、申请号为202010496417.7，申请名称为“扣式电池及其制造方法、电子设备”中国专利申请的优先权，其与本申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，尤其涉及一种扣式电池及其制造方法、电子设备。
背景技术
扣式电池，指外形尺寸像一颗纽扣的电池，一般来说直径较大，厚度较薄。扣式电池因其体积小，故在各种微型电子设备中得到了广泛的应用，例如：穿戴电子设备领域、以及医疗产品领域等。
由于扣式电池的内部属于密闭空间，因此，密封性对于扣式电池而言极其重要。然而，现有技术中的扣式电池的密封性差，进而导致扣式电池的安全性、稳定性均较差。
发明内容
鉴于上述问题，本申请实施例提供一种扣式电池及其制造方法、电子设备，安全性及稳定性较好。
为了实现上述目的，本申请实施例提供如下技术方案：
本申请实施例的第一方面提供一种扣式电池，包括壳体、电极组件和封口件，壳体内具有容纳腔，电极组件位于容纳腔内，壳体上设有用于向容纳腔中注入电解液的注液孔；壳体的外表面上设有凹陷部，凹陷部凹向容纳腔内侧，凹陷部位于注液孔的孔口处，并与注液孔连通；封口件焊接在壳体外侧，以封盖凹陷部和注液孔。
本申请实施例的第二方面提供一种电子设备，包括电子设备本体和第一方面的扣式电池，扣式电池为电子设备本体提供电能。
本申请实施例的第三方面提供一种扣式电池，其包括：包括：壳体、电芯和导电件；所述壳体包括底壳和顶盖，所述顶盖与所述底壳密封连接，所述底壳和所述顶盖围设形成用于容置所述电芯的容置腔，所述顶盖上设有与所述容置腔连通的通孔，所述导电件封盖在所述通孔上，并与所述顶盖之间通过密封胶圈绝缘且密封连接；所述导电件上还设有用于向所述容置腔内注入电解液的注液口，所述注液口上封盖有封口件，所述封口件与所述注液口之间密封连接；所述电芯具有第一极耳和第二极耳，所述第一极耳抵接在所述底壳的内底壁上，并与所述底壳的内底壁焊接，所述第二极耳与所述导电件电连接。
本申请实施例的第四方面提供一种电子设备，包括电子设备本体和第三方面提供的扣式电池；所述扣式电池为所述电子设备本体提供电能。
本申请实施例的第五方面提供一种扣式电池的制造方法，包括如下步骤：将导电件封盖在顶盖的通孔上，使所述顶盖与所述导电件绝缘且密封的连接在一起；将电芯放置在底壳的容置腔内；用抵接件将所述电芯中的第一极耳抵接在所述底壳的内底壁上，使所述第一极耳与所述底壳的内底壁贴合；将所述第一极耳焊接在所述底壳的内底壁上；将电芯中第二极耳与导电件电连接；去除所述抵接件，将电解液从所述导电件上的注液口注入至所述容置腔内，所述电解液注入完成后，用封口件封盖所述注液口，并与所述导电件密封连接。
本申请实施例的第六方面提供一种扣式电池的制造方法，包括如下步骤：将顶盖和导电件绝缘且密封的连接在一起，所述导电件封盖在所述顶盖的通孔上；将电芯中的第二极耳与所述导电件电连接；将与所述导电件电连接的电芯放置在底壳和具有导电件的顶盖围设形成的容置腔内；将具有导电件的顶盖与底壳密封连接；将所述电芯中的第一极耳与所述底壳焊接；将电解液从所述导电件上的注液口注入至所述容置腔内，所述电解液注入完成后，用封口件封盖所述注液口并与所述导电件密封连接。
本申请实施例提供的扣式电池具有如下优点：
本申请实施例中，扣式电池包括壳体、电极组件和封口件，壳体内具有 容纳腔，电极组件位于容纳腔内，壳体上设有用于向容纳腔中注入电解液的注液孔；壳体的外表面上设有凹陷部，凹陷部凹向容纳腔内侧，凹陷部位于注液孔的孔口处，并与注液孔连通；封口件焊接在壳体外侧，以封盖凹陷部和注液孔。上述方案中，通过在注液孔的孔口处设置凹陷部，并且凹陷部的口部朝向壳体的外侧敞开，在电解液注入完毕后，残留在注液孔的孔口附近的电解液会容置于凹陷部中，而不会附着在到壳体的外表面上的焊接区域，因此不会影响到封口件和壳体的焊接操作，也不会影响到焊接的密封性，因此扣式电池的安全性、稳定性均较佳。
除了上面所描述的本申请实施例解决的技术问题、构成技术方案的技术特征以及由这些技术方案的技术特征所带来的有益效果外，本申请实施例提供的扣式电池及其制造方法、电子设备所能解决的其他技术问题、技术方案中包含的其他技术特征以及这些技术特征带来的有益效果，将在具体实施方式中作出进一步详细的说明。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的扣式电池的整体结构示意图；
图2为本申请实施例提供的扣式电池的沿着第一极耳剖切的剖视示意图；
图3为本申请实施例提供的扣式电池的沿着第二极耳剖切的剖视示意图；
图4为本申请实施例提供的扣式电池中盖板组件的剖面图；
图5为本申请实施例提供的扣式电池的另一种结构的剖视示意图；
图6为本申请实施例提供的扣式电池的另一种结构的剖视示意图；
图7为本申请实施例提供的扣式电池的另一种结构的整体结构示意图；
图8为本申请实施例二提供的扣式电池的结构示意图；
图9为本申请实施例二提供的扣式电池的分解结构示意图；
图10为本申请实施例二提供的扣式电池的第一种结构的内部结构示意图；
图11为本申请实施例二提供的扣式电池的第二种结构的内部结构示意图；
图12为本申请实施例二提供的扣式电池的第三种结构的内部结构示意图；
图13为本申请实施例三提供的扣式电池的制造方法的流程图；
图14为本申请实施例四提供的扣式电池的另一种制造方法的流程图。
具体实施方式
现有的扣式电池存在封口片和金属壳体焊接时，焊接密封性不好易导致扣式电池安全性、稳定性较差的技术问题。这是由于，在通过注液口向金属壳体内注入电解液时，会有部分电解液滞留在金属壳体上的焊接区域附近，从而影响到金属壳体和封口片的焊接操作。
而本申请的扣式电池通过在注液孔的孔口处设置凹陷部，作为残存电解液的滞留部而发挥作用，能够有效避免电解液附着在壳体外表面上的焊接区域中，从而避免对封口件和壳体的焊接造成影响。
为了使本申请实施例的上述目的、特征和优点能够更加明显易懂，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有付出创造性劳动的前提下所获得的所有其它实施例，均属于本申请保护的范围。
实施例一
下面结合附图说明本申请实施例的扣式电池。
图1为本申请实施例提供的扣式电池的整体结构示意图，图2为本申请实施例提供的扣式电池的沿着第一极耳剖切的剖视示意图，图3为本申请实施例提供的扣式电池的沿着第二极耳剖切的剖视示意图，图4为本申请实施例提供的扣式电池中盖板组件的剖面图。
参照图1、图2、图3、图4，本申请实施例中，扣式电池100包括壳体10、电极组件20和封口件30，壳体10内具有容纳腔11，电极组件20位于容纳腔11内，壳体10上设有用于向容纳腔11中注入电解液的注液孔50；壳体10的外表面上设有凹陷部60，凹陷部60凹向容纳腔11内侧，凹陷部 60位于注液孔50的孔口51处，并与注液孔50连通；封口件30焊接在壳体10外侧，以封盖凹陷部60和注液孔50。
上述方案中，通过在注液孔50的孔口51处设置凹陷部60，并且凹陷部60的口部朝向壳体10的外侧敞开，在电解液注入完毕后，残留在注液孔50的孔口51附近的电解液会容置于凹陷部60中，而不会附着在壳体10外表面上的焊接区域中，因此不会影响到封口件30和壳体10的焊接操作，也不会影响到焊接的密封性，因此扣式电池100的安全性、稳定性均较佳。
另外，由于在注液孔50的孔口51处设置凹陷部60，封口件30与壳体10的焊接点与现有技术仅有注液孔50的结构相比，距离注液孔50中心轴线的距离更远，这样更利于焊接操作。
其中，扣式电池是指外形尺寸像纽扣的电池，一般其直径较大，厚度尺寸较薄，因此扣式电池是从外形上来对电池进行的分类。本申请中，壳体10可以为金属壳体，壳体10的截面形状不限于圆形，还可以为椭圆形、多边形等。下述实施例以扣式电池100为锂离子电池为例进行说明。
本申请实施例中，参照图2、图3，电极组件20可以包括卷芯24、第一极耳25和第二极耳26，卷芯24包括第一极片21、第二极片22、以及用于将第一极片21和第二极片22隔离开的隔离膜23等。具体的，卷芯24可以为圆柱形卷绕体且设于容纳腔11内，容纳腔11内也同时容纳有电解液，第一极片21与第二极片22由隔离膜23隔开并卷绕，另外，在卷芯24的中心部可以设有中空部241。可以理解的是，也可以在卷芯24的顶端部和底端部分别设置有端面绝缘胶242。
第一极片21上靠近卷绕外周的位置电连接有第一极耳25，第二极片22上靠近卷绕外周的位置电连接第二极耳26，第一极耳25和第二极耳26可以分别在卷芯24的两端侧引出，且第一极耳25和第二极耳26各自与卷芯24中心的连线的夹角大于0°且小于180°，例如可以在90°到180°之间。电解液可以通过在壳体10上设置的注液孔50而注入壳体10内。
上述方案中，凹陷部60凹向容纳腔11内侧是指，凹陷部60的深度方向由容纳腔11外侧指向内侧；而凹陷部60位于注液孔50的孔口51处，并与注液孔50连通是指，凹陷部60位于注液孔50的孔口51边缘处，并朝向壳体10外侧敞口。
第一极片21和第二极片22可以均涂覆有电池活性材料。第一极耳25和第二极耳26的表面还可以分别贴附有保护胶。
本申请实施例中，为了使注液孔50的整周方向上的焊接操作均不会受到影响，凹陷部60可以沿注液孔50的周向环绕孔口51，以使凹陷部60形成沉孔结构，而设置成沉孔结构也便于加工。
可选的，注液孔50的直径范围可以为0.2～3mm，例如可以为0.5～1.5mm，凹陷部60、即沉孔结构的直径范围为1.5～3.5mm，例如可以为2～3mm，凹陷部60的深度范围为0.01～0.2mm，例如可以为0.05～0.1mm，其中，凹陷部60和注液孔50的横截面形状可以为圆形或多边形。
本申请实施例中，参照图2、图3，在一种可选的实施方式中，壳体10包括下壳体13和盖板组件12，下壳体13和盖板组件12可以共同围成容纳腔11。像上述这样将壳体10设置成可拆卸的两部分，以便于电极组件20等安装至容纳腔11中。可选的，下壳体13可以包括底壁131和围绕底壁131的侧壁132，侧壁132的底端与底壁131连接，这样，将下壳体13形成为具有敞口的罩状结构。
本申请的扣式电池100中，注液孔50可以根据需要设置在壳体10的顶部或底部，下面分情况来说明。
参照图2、图3，在一种可选的实施方式中，盖板组件12包括顶盖121和导电件122，顶盖121连接在下壳体13的顶部，顶盖121上开设有通孔1211，导电件122封盖在通孔1211上，并且导电件122与顶盖121绝缘连接；注液孔50位于导电件122上，封口件30焊接在导电件122上，以封盖凹陷部60和注液孔50。导电件122的材质例如可以是铝或铝合金，顶盖121的材质为金属，例如可以是钢或镍。
此处，导电件122与顶盖121绝缘连接，例如可以是在导电件122与顶盖121之间设置绝缘密封胶，例如热熔PP(聚丙烯)胶123，这样，在被加热的状态下，导电件122和顶盖121之间通过热熔PP胶123连接起来，可以使导电件122与顶盖121之间绝缘并且密封。在顶盖121的面向容纳腔11的内侧壁上，还可以贴附有壳体绝缘胶124，该壳体绝缘胶124为非金属绝缘材质，厚度可以为0.02～0.1mm，例如为0.03～0.05mm。
参考图2、图4，是盖板组件12的结构示意图，可选的，导电件122 包括凸台部1221，凸台部1221与顶盖121的通孔1211对应设置，且凸台部1221凸出于导电件122的其他部分的外侧，以通过通孔1211伸入容纳腔11内部，另外，第一极耳25和凸台部1221的底端面电连接。像这样通过在导电件122上设置凸台部1221，凸台部1221从顶盖121的通孔1211伸入到容纳腔11内部，便于和第一极耳25电连接。作为一种可能的实施方式，凸台部1221例如可以通过冲压形成，凸台部1221的外部轮廓可以与通孔1211的边缘部轮廓大致相同。
导电件122中，还可以包括设置在凸台部1221周围的搭接部1222，搭接部1222的一端与凸台部1221连接，并向背离凸台部1221的方向伸出，导电件122安装时，可以使搭接部1222通过热熔PP胶123而焊接在顶盖121上，且凸台部1221通过通孔1211而伸入容纳腔11内。需要注意的是，凸台部1221的侧面距离通孔的孔壁有预设的间隔，以避免导电件122和顶盖121接触。此时，第一极耳25可以直接与凸台部1221接触，即实现导电件122和第一极耳25的电连接。第二极耳26可以直接焊接在壳体10底部内侧壁上，焊接点可以对应于卷芯24的中心位置。
这里第一极耳25和凸台部1221可以彼此焊接连接，并形成第二焊印126，第二焊印126可以位于导电件122的背离封口件30的一面，即图2中，第二焊印126位于导电件122的上表面上。
而封口件30和导电件122彼此焊接而可以形成有第一焊印125，第一焊印125可以位于导电件122朝向封口件30的一面，即图2中，第一焊印125位于导电件122的下表面上。这样在第一焊印125位于封口件30的一面上，从封口件30的外观上看不到焊印，可以增强扣式电池的美观性。
此处，第一焊印125和第二焊印126可以相互错开，这样能够提高整个扣式电池外观上的平整度，使扣式电池外观较为美观。
或者，第一焊印125和第二焊印126也可以彼此重叠。这样在焊接时，第一焊印125和第二焊印126可以相互熔合，能够增强焊接的牢固性，使得扣式电池的可靠性较高。
继续参照图4，凸台部1221的凸出端面面相对于下壳体13底部所处的高度，低于顶盖121的底端面所处的高度，即凸台部1221的底端面也即凸 出端面相对于下壳体13底部的设置高度h1，低于顶盖121的底端面相对于下壳体13底部的设置高度h2。这样第一极耳25可以直接搭接在凸台部1221的底端面上焊接，而并不会接触到下壳体13的内壁。当然，在顶盖12底端面上设置有壳体绝缘胶124的情况下，可以认为绝缘胶124的底端面即顶盖121的底端面。
可选的，参照图2，导电件122上背离凸台部1221的一面上还可以开设有安装槽1223，安装槽1223与凸台部1221的位置相对应，注液孔50可以位于安装槽1223的槽底，这样可以使封口件30安装于安装槽1223内。通过设置可容置封口件30的安装槽1223，这样封口件30不会凸出于扣式电池100的表面，外观比较好，其次安装槽1223位于与凸台对应的位置，这样可以充分利用凸台部1221分的凸出高度，使整个导电件122的厚度较为均匀。
图5为本申请实施例提供的扣式电池的另一种结构的剖视示意图，图6为本申请实施例提供的扣式电池的另一种结构的剖视示意图，图7为本申请实施例提供的扣式电池的另一种结构的整体结构示意图。参照图5、图6、图7介绍注液孔设置在壳体底部的情况，本方案中的扣式电池200在上述方案的基础上对注液孔的位置作了改变，导电件的结构、以及封口件的安装位置也因此作了改变。其余结构与上述图2、图3所示的结构类似，此处不再赘述。
如前所述，下壳体13包括底壁131和围绕底壁131的侧壁132，侧壁132的底端与底壁131连接，与前述不同的是，注液孔70位于底壁131上，封口件71焊接在底壁131上，以封盖注液孔70。
在一种可选的实施方式中，盖板组件12包括顶盖121和导电件72，顶盖121连接在侧壁132的顶端，顶盖121上开设有通孔1211，导电件72封盖在通孔1211上，并且导电件72与顶盖121绝缘连接；电极组件20包括第一极耳25和第二极耳26，第一极耳25和导电件72焊接连接，第二极耳26和底壁131焊接连接。
在注液孔70设置在底壁131上的情况下，封口件71和底壁131的焊接点A位于底壁131上靠近封口件71的位置处，而底壁131和第二极耳26的焊接点B可以位于其它位置处，以与该焊接点A的位置避开，避免两个焊接 点重叠，可以增加整个扣式电池外观的平整度。而对于第一极耳25，可以直接与导电件72焊接。
可以理解的是，在底壁131的外表面上可以开设有底部安装槽74，注液孔70可以位于底部安装74的槽底。底部安装槽74被配置为能够容纳封口件71，这样可以使封口件71安装于底部安装槽74内。这里通过设置可容置封口件71的底部安装槽74，这样封口件71不会凸出于扣式电池100的表面，外观较佳。
本申请的扣式电池中，电解液从注液孔处注入卷芯的中空部内，而凹陷部用于储存残余的电解液，在注液后，封口件覆盖注液孔和凹陷部，通过圆周搭接、并焊接行密封，当然，可以使封口件与注液孔之间近似同轴设置。
本申请实施例中，扣式电池包括壳体、电极组件和封口件，壳体内具有容纳腔，电极组件位于容纳腔内，壳体上设有用于向容纳腔中注入电解液的注液孔；壳体的外表面上设有凹陷部，凹陷部凹向容纳腔内侧，凹陷部位于注液孔的孔口处，并与注液孔连通；封口件焊接在壳体外侧，以封盖凹陷部和注液孔。上述方案中，通过在注液孔的孔口处设置凹陷部，并且凹陷部的口部朝向壳体的外侧敞开，在电解液注入完毕后，残留在注液孔的孔口附近的电解液会容置于凹陷部中，而不会附着在到壳体的外表面上，因此不会影响到封口件和壳体的焊接操作，也不会影响到焊接的密封性，因此扣式电池的安全性、稳定性均较佳。
本申请还提供一种电子设备，包括：电子设备本体和扣式电池，扣式电池为电子设备本体提供电能。
其中，本申请提供的电子设备中的扣式电池的结构与以上所述的扣式电池的结构相同，并能带来相同或者类似的技术效果，在此不再一一赘述。
实施例二
由于扣式电池的内部属于密闭空间，因此，密封性对于扣式电池而言极为重要，而在相关技术中，是先将电解液注入至放置由电芯的容置腔内，再将导电件穿设在壳体上的通孔内，使导电件与通孔铆接，且导电件与通孔之间设置绝缘的密封胶圈，然而，导电件与通孔铆接时，壳体会发生震荡，容置腔内的电解液会飞溅至密封胶圈处，使密封胶圈部分失效，导致 密封性差。
为了解决上述问题，本申请实施例提供的扣式电池中，导电件封盖在顶盖的通孔上，将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起，将电芯放置在底壳的容置腔内，使电芯上的第一极耳与底壳的内底壁进行焊接，再将具有导电件的顶盖与底壳密封连接，并使电芯上的第二极耳与导电件电连接，最后再将具有导电件的顶盖与底壳密封连接，将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，将封口件封盖在注液口上，并使封口件与注液口通过粘接或者焊接的方式密封连接，从而提高了扣式电池的密封性。
如图8所示，本申请实施例提供的扣式电池包括：壳体10、位于壳体10的容置腔1011内的电芯20和设置在壳体10上并与壳体10绝缘连接的导电件30，导电件30上设有向容置腔1011内注入电解液的注液口301和封盖注液口301的封口件40，封口件40与注液口301密封连接，电芯20上设有第一极耳201和第二极耳202，第一极耳201与壳体10通过焊接等方式进行电连接，第二极耳202与导电件30也通过焊接、粘接的方式电连接，壳体10和导电件30分别与电子设备电连接，以使电芯20通过壳体10与导电件30向电子设备提供电能。
如图9至图11所示，壳体10包括底壳101和顶盖102，底壳101上设有朝向底壳101的底壁延伸的凹槽，凹槽形成用于容置电芯20的容置腔1011，顶盖102封盖在与容置腔1011连通的的开口处，以使底壳101和顶盖102围设形成具有容置腔1011的壳体10。其中，为了提高密封性，顶盖102与底壳101之间密封连接，例如，顶盖102与底壳101之间进行焊接等。
壳体10的横截面的形状可以是圆形，椭圆形、多边形等任意形状，对此，本实施例不做限制。
由于电芯20要通过壳体10和导电件30为电子设备提供电能，因此，壳体10和导电件30可以选用不锈钢、铜、铁等金属材质制成。
顶盖102上设有通孔1021，以使顶盖102形成环状结构，导电件30封盖在通孔1021上，且导电件30和通孔1021之间设置有密封胶圈50，密封胶圈50使导电件30和通孔1021之间绝缘且密封连接，也就是说，导电件30通过密封胶圈50粘接在通孔1021边缘上，并将顶盖102上的通孔1021 封盖。其中，通孔1021的形状可以是圆形、椭圆形或多变形等。
为了提高导电件30与顶盖102之间的连接密封性，可通过加热加压的方式将导电件30通过密封胶圈50粘接在顶盖102上，这样，可以提高密封胶圈50的粘接可靠性，从而提高导电件30与顶盖102之间的连接密封性。
进一步的，导电件30可以突出顶盖102的表面，也可以在顶盖102上设置用于放置导电件的容置槽1022，导电件30位于容置槽1022内，如图12所示，且导电件30的上表面与顶盖102的上表面平齐，导电件30通过密封胶圈50与顶盖102绝缘且密封连接时，在加热加压时，密封胶圈50会发生溢胶，这样，溢出的胶位于容置槽1022内，不会溢出顶盖102的表面，这样，顶盖102的表面比较平整，且扣式电池的整体结构更加紧凑，提高了扣式电池的整体美观性。
在一个实施例中，通孔1021为圆孔，导电件30为圆盘状，通孔1021的直径小于导电件30的直径，因此，导电件30的边缘与通孔1021边缘处沿径向至少有一部分层叠设置，通孔1021和导电件30之间通过密封胶圈50采用加热加压的方式使其紧密粘接，高热高压下的密封胶圈50能够使通孔1021和导电件30之间连接的更紧密，从而提高了扣式电池的密封性。
由于导电件30的边缘与通孔1021的边缘沿径向单边层叠的尺寸越大，则密封性越好，因此，在一个实施例中，导电件30与通孔1021沿径向的单边层叠部分大于等于0.3mm，这样，增大了导电件30与通孔1021之间的密封面积，从而提高了导电件30与通孔1021之间的密封性。
进一步的，如图10所示，导电件30上还设有穿设于通孔1021中的延伸部303，例如，导电件30形成为T字型的导电件30，这样，延伸部303与通孔1021的孔壁之间通过密封胶圈50密封连接，进一步增大了导电件30与通孔1021之间的密封面积，从而提高了导电件30与通孔1021之间的密封性。其中，密封胶圈50可以为可溶性材质，提高密封胶圈50的抗电解液的腐蚀性和密封性。
其中，密封胶圈50为环状，当对导电件30和顶盖102进行加热加压时，密封胶圈50的外边缘溢出导电件30与顶盖102的接合处，密封胶圈50的内边缘溢出密封胶圈50与顶盖102上的通孔1021的边缘接合处，这样，能够保证密封胶圈50在连接导电件与顶盖102的连接可靠性。
在上述实施例的基础上，如图8至图11所示，导电件30上还设有向容置腔1011内注入电解液的注液口301，注液口301可以是圆形、四边形、多边形等任意形状。在一个实施例中，注液口301与导电件30同心设置，导电件30与壳体10中用于盛放电芯20的容置腔1011同心设置。
在一个实施例中，为了提高封口件40与注液口301之间的密封性，注液口301远离容置腔1011的一端设有沉孔302，沉孔302的直径大于注液口301，且沉孔302与注液口301连通并同轴心设置。其中，沉孔302的形状与注液口301的形状相同，即注液口301的形状为圆形时，则沉孔302的形状也为圆形，示例性的，沉孔302的深度可以为0.01～0.5mm之间。
注液口301上封盖有封口件40，即封口件40位于沉孔302内，由于沉孔302的深度较小，因此，封口件40可以为片状结构，位于沉孔302内以封盖注液口301，为了提高密封性，封口件40与注液口301密封连接，例如，封口件40与注液口301之间可以焊接，也就是说，当通过注液口301向容置腔1011内注入电解液之后，在壳体10外侧将封口件40与沉孔302之间的接合处进行焊接，从而提高密封性。
示例性的，封口件40可以是封口钉，封口钉位于沉孔302内，再将封口钉与沉孔302的接合处通过焊接的方式焊接在一起。
如图11所示，当封口钉与注液口301之间是通过焊接的方式密封时，为了方便焊接，沉孔302的直径大于封口钉的钉帽的直径，封口钉位于沉孔302内的部分具有焊印，也就是说，焊接设备可以从沉孔302内对封口钉与导电件30之间的接合处进行焊接，例如，激光焊接设备的激光束可以伸入至沉孔302内将封口钉与导电件30焊接在一起。
可选的，封口件40还可以位于沉孔302内，并与沉孔通过密封胶圈等方式进行粘接，以简化操作工序。
在一种可选的实现方式中，电芯20为卷绕式电芯20，具体的，卷绕式电芯20包括第一极片、第二极片以及将第一极片和第二极片隔开的隔膜；第一极片上设置有第一极耳201，第一极耳201可以通过焊接的方式设置在第一极片上，第二极片上设置有第二极耳202，第二极耳202可以通过焊接的方式设置在第二极片上；卷绕过程中第一极片、第二极片以及隔膜从卷绕首端开始朝同一方向逐层卷绕并最终形成卷绕式电芯20。
可以理解的是，电芯20的第一极片可以为正极片，第二极片可以为负极片，此时，设置在第一极片上的第一极耳201为正极耳，设置在第二极片上的第二极耳202为负极耳，具体实现时，将电芯20容置于容置腔1011内，正极耳与底壳101的内底壁通过焊接的方式电连接以使底壳101形成为扣式电池的正极，负极耳与导电件30电连接以使导电件30形成为扣式电池的负极，当该扣式电池应用在电子设备上时，底壳101与电子设备的正极连接导通，导电件30与电子设备的负极连接导通，从而使电芯20为电子设备供电。
或者，电芯20的第一极片可以为负极片，第二极片可以为正极片，此时，设置在第一极片上的第一极耳201为负极耳，设置在第二极片上的第二极耳202为正极耳，具体实现时，将电芯20容置于容置腔1011内，负极耳与底壳101通过焊接的方式电连接以使底壳101形成为扣式电池的负极，正极耳与导电件30电连接，以使导电件30形成为扣式电池的正极，当该扣式电池应用在电子设备上时，底壳101与电子设备的负极连接导通，导电件30与电子设备的正极连接导通，从而使电芯20为电子设备供电。
在一个实施例中，第二极耳202与导电件30上伸入容置腔1011内的延伸部303的端部电连接，这样，可以增大第二极耳202与导电件30的接触面积，从而提高电连接的可靠性。其中，为了防止顶盖102对第二极耳202与延伸部303连接时发生干涉，延伸部303伸入容置腔1011后，延伸部303朝向容置腔1011的一端超过了顶盖102的内壁，这样，第二极耳202与延伸部303的端面连接时，第二极耳202与顶盖102的内壁之间形成有间隙，或者在顶盖102的内壁和第二极耳202之前设置绝缘层，以提高第二极耳202与导电件30电连接的可靠性。
需要说明的是，第一极耳201与壳体10中的顶盖102通过焊接、粘接的方式电连接。
可选的，为了提高第一极耳201和第二极耳202的电连接的可靠性，可以在第一极耳201和第二极耳202的周向上均设置绝缘层，第一极耳201或第二极耳202只将与底壳101或导电件30电连接的部分裸露出来即可。
可选的，卷绕式电芯20在卷绕时可以在中心位置形成电芯空腔203，当电芯20放置在容置腔1011内后，电芯空腔203与注液口301同心设置，这样，当电解液向容置腔1011内注入电解液时，电芯20中的极片以及隔膜等 不会阻挡电解液的注入，提高了电解液注入效率，从而提高扣式电池的生产效率。
在一个实施例中，如图10所示，从注液口301处还可以向电芯空腔203中插入抵接件60，抵接件60可以是柱状结构，例如，圆柱、棱柱等结构，可以是由一个柱状件组成，也可以是由两件或者两件以上的柱状件依次首尾连接组成，当焊接第一极耳201与底壳101的内底壁时，先将抵接件60插入至电芯空腔203内，使抵接件60的第一端抵接在第一极耳201上，并在抵接件60的第二端施加压力，使第一极耳201通过抵接件60的挤压贴合在底壳101的内底壁上，再进行焊接，这样，可以提高第一极耳201与底壳101之间的焊接可靠性，从而提高第一极耳201与底壳101之间的电连接可靠性。
需要说明的是，为了方便用户操作，抵接件60的第二端可以伸出壳体10的顶盖102，当扣式电池中的第一极耳201与底壳101的内底壁焊接完成，且具有导电件30的顶盖102与底壳101之间密封连接后，抵接件60可以从电芯空腔203中沿注液口301取出。
由于在焊接过程中，可能会发生抖动，若先将底壳101与顶盖102进行密封连接后，再焊接第一极耳201与底壳101时而产生抖动，从而导致底壳101与顶盖102之间发生偏移，使底壳101与顶盖102之间发生错位，导致底壳101与顶盖102之前的密封连接发生松动或者密封连接失效，最终导致扣式电芯的密封性差。因此，在本实施例中，先将带有第一极耳201和第二极耳202的电芯20放置在底壳101的容置腔1011内，并向电芯20的电芯空腔203内插入抵接件60，通过抵接件60挤压第一极耳201，使第一极耳201与底壳101的内底壁贴合，再通过焊接设备对底壳101与第一极耳201进行焊接，使第一极耳201与底壳101之间实现电连接，再将具有导电件30的顶盖102通过焊接或者粘接的方式与底壳101之间进行密封连接，由于底壳101和顶盖102之间焊接时，也会发生抖动，而抵接件60始终抵接在第一极耳201上，因此，第一极耳201与底壳101的内壁之间不会因抖动而发生连接松动的问题，保证了第一极耳201与底壳101之间的连接可靠性的同时，提高了底壳101与顶盖102之间的密封连接可靠性，从而提高了扣式电池的密封性。
本申请实施例提供的扣式电池，在具体实现时，首先，通过加热加压的 方式将顶盖102和导电件30之间通过密封胶圈50绝缘且密封的连接在一起，再将电芯20放入底壳101内的容置腔1011内，抵接件60插入电芯空腔203内，抵接件60的第一端抵接在第一极耳201上，抵接件60的第二端伸出顶盖102外，通过挤压抵接件60，使第一极耳201与底壳101的内底壁之间贴合，通过焊接设备将第一极耳201与底壳101之间进行焊接，再将具有导电件30的顶盖102封盖在底壳101上，通过粘接或者焊接的方式密封连接底壳101和顶盖102，并使电芯20上的第二极耳202与导电件30电连接，取出抵接件60，并将电解液从注液口301处注入进容置腔内，当电解液注入完成后，将封口件40封盖在注液口301上，并通过粘接或者焊接的方式将封口件40与注液口301处进行密封连接。
本申请实施例提供的扣式电池，导电件封盖在顶盖的通孔上，将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起，将电芯放置在底壳的容置腔内，使电芯上的第一极耳与底壳的内底壁进行焊接，再将具有导电件的顶盖与底壳密封连接，并使电芯上的第二极耳与导电件电连接，最后再将具有导电件的顶盖与底壳密封连接，将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，将封口件封盖在注液口上，并使封口件与注液口通过粘接或者焊接的方式密封连接，从而提高了扣式电池的密封性。
本申请实施例还提供一种电子设备，包括电子设备本体和实施例一中提供的扣式电池，扣式电池为电子设备本体提供电能。
其中，扣式电池的结构和工作原理已在实施例一中进行了详细的阐述，在此，不再一一进行赘述。
本申请提供的电子设备，包括电子设备本体和为电子设备本体提供电能的扣式电池，扣式电池通过导电件封盖在顶盖的通孔上，将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起，将电芯放置在底壳的容置腔内，使电芯上的第一极耳与底壳的内底壁进行焊接，再将具有导电件的顶盖与底壳密封连接，并使电芯上的第二极耳与导电件电连接，最后再将具有导电件的顶盖与底壳密封连接，将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，将封口件封盖在注液口上，并使封口件与注液口通过粘接或者焊接的方式密封连接，从而提高了扣式电池的密封性。
实施例三
如图13所示，本申请实施例还提供一种扣式电池的制造方法，包括如下步骤：
S101：将导电件封盖在顶盖的通孔上，使顶盖与导电件绝缘且密封的连接在一起；
顶盖和导电件之间设置有密封胶圈，通过对顶盖和导电件之间先进行加热加压的方式挤压连接在一起，密封胶圈受到挤压发生变形，以提高顶盖与导电件之间的密封性。
S102：将电芯放置在底壳的容置腔内。
S103：用抵接件将电芯中的第一极耳抵接在底壳的内底壁上，使第一极耳与底壳的内底壁贴合。
S104：将第一极耳焊接在底壳的内底壁上。
S105：将电芯中第二极耳与导电件电连接。
S106:去除抵接件，将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，用封口件封盖注液口，并与导电件密封连接。
需要说明的是，也可以在具有导电件的顶盖与底壳密封连接之前，先将电芯中的第二极耳与导电件电连接。
可选的，将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起之前，还包括：
对顶盖和导电件进行钝化处理。
其中，钝化处理指的是金属经强氧化剂或电化学方法进行氧化处理，使表面变为不活泼态即钝化的过程，是使金属表面转化为不易被氧化的状态，而延缓金属的腐蚀速度的方法。
可选的，将电芯中的第一极耳与底壳焊接之前，还包括：
从注液口挤压放置在电芯空腔中的抵接件；抵接件挤压电芯中的第一极耳与底壳的内底壁贴合。
本申请实施例提供的扣式电池的制造方法，导电件封盖在顶盖的通孔上，将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起，将电芯放置在底壳的容置腔内，使电芯上的第一极耳与底壳的内底壁进行焊接，再将具有导电件的顶盖与底壳密封连接，并使电芯上的第二极耳与导电件电连接， 最后将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，将封口件封盖在注液口上，并使封口件与注液口密封连接，从而提高了扣式电池的密封性。
实施例四
如图14所示，本申请实施例还提供一种扣式电池的另一种制造方法，包括如下步骤：
S01：将顶盖和导电件绝缘且密封的连接在一起，导电件封盖在顶盖的通孔上；
S02：将电芯中的第二极耳与导电件电连接；
S03：将与导电件电连接的电芯放置在底壳和具有导电件的顶盖围设形成的容置腔内；
S04：将具有导电件的顶盖与底壳密封连接；
S05：将电芯中的第一极耳与底壳焊接；
S06：将电解液从导电件上的注液口注入至容置腔内，电解液注入完成后，用封口件封盖注液口并与导电件密封连接。
需要说明的是，也可以是在具有导电件的顶盖与底壳密封连接之后再将将电芯中的第二极耳与导电件电连接。
本申请实施例提供的扣式电池的制造方法，在具体实现时，首先，通过加热加压的方式将顶盖和导电件通过密封胶圈绝缘且密封的连接在一起，并将导电件与第二极耳电连接，将与导电件通过第二极耳电连接的电芯放置在容置腔内，具有导电件的顶盖封盖在底壳上，并通过粘接或者焊接的方式将底壳与顶盖进行密封连接，可以从注液口处插入抵接件，使抵接件抵接在第一极耳上，使第一极耳与底壳的内底壁贴合，通过焊接设备将第一极耳焊接在底壳上，再将抵接件从注液口处取出，将封口件封盖在注液口上，并通过焊接或者粘接的方式将封口件粘接在导电件上，其中，为了提高密封性，还可以在封口件与注液口处添加密封件，从而提高扣式电池的密封性。
由于先焊接第一极耳与底壳的内底壁，后焊接底壳与顶盖时，会因焊接导致第一极耳与底壳发生抖动，会使第一极耳与底壳内底壁之间的焊接发生松动，从而导致第一极耳与底壳的电连接的可靠性低的问题。在本实施例中，先焊接底壳与顶盖，再焊接第一极耳与底壳的内底壁，可以提高第一极耳与 底壳的焊接可靠性，从而提高第一极耳与底壳之间的电连接可靠性。
本说明书中各实施例或实施方式采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分相互参见即可。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (26)

  1. 一种扣式电池，其特征在于，包括壳体、电极组件和封口件，所述壳体内具有容纳腔，所述电极组件位于所述容纳腔内，所述壳体上设有用于向所述容纳腔中注入电解液的注液孔；
    所述壳体的外表面上设有凹陷部，所述凹陷部凹向所述容纳腔内侧，所述凹陷部位于所述注液孔的孔口处，并与所述注液孔连通；所述封口件焊接在所述壳体外侧，以封盖所述凹陷部和所述注液孔。
  2. 根据权利要求1所述的扣式电池，其特征在于，
    所述凹陷部沿所述注液孔的周向环绕所述孔口，以使所述凹陷部形成沉孔结构。
  3. 根据权利要求1或2所述的扣式电池，其特征在于，
    所述壳体包括下壳体和盖板组件，所述下壳体和所述盖板组件共同围成所述容纳腔；
    所述盖板组件包括顶盖和导电件，所述顶盖连接在所述下壳体的顶部，所述顶盖上开设有通孔，所述导电件封盖在所述通孔上，并且所述导电件与所述顶盖绝缘连接；
    所述注液孔位于所述导电件上，所述封口件焊接在所述导电件上，以封盖所述凹陷部和所述注液孔。
  4. 根据权利要求3所述的扣式电池，其特征在于，
    所述导电件包括凸台部，所述凸台部与所述顶盖的通孔对应设置，且所述凸台部凸出于所述导电件的其他部分的外侧，以通过所述通孔伸入所述容纳腔内部；
    所述电极组件包括第一极耳，所述第一极耳和所述凸台部电连接。
  5. 根据权利要求4所述的扣式电池，其特征在于，
    所述封口件和所述导电件彼此焊接而形成有第一焊印，所述第一焊印位于所述导电件朝向所述封口件的一面；所述第一极耳和所述凸台部彼此焊接连接，并形成第二焊印，所述第二焊印位于所述导电件的背离所述封口件的一面；
    所述第一焊印和所述第二焊印错开；或者
    所述第一焊印和所述第二焊印彼此重叠。
  6. 根据权利要求4所述的扣式电池，其特征在于，
    所述凸台部的凸出端面相对于所述下壳体底部所处的高度低于所述顶盖的底端面所处的高度。
  7. 根据权利要求4所述的扣式电池，其特征在于，
    所述导电件上背离所述凸台部的一面上设有安装槽，所述安装槽与所述凸台对应，所述注液孔位于所述安装槽的槽底，所述封口件安装于所述安装槽内。
  8. 根据权利要求1或2所述的扣式电池，其特征在于，
    所述壳体包括下壳体和盖板组件，所述下壳体和所述盖板组件共同围成所述容纳腔；
    所述下壳体包括底壁和围绕所述底壁的侧壁，所述侧壁的底端与所述底壁连接，所述注液孔位于所述底壁上，所述封口件焊接在所述底壁上，以封盖所述注液孔。
  9. 根据权利要求8所述的扣式电池，其特征在于，
    所述盖板组件包括顶盖和导电件，所述顶盖连接在所述侧壁的顶端，所述顶盖上开设有通孔，所述导电件封盖在所述通孔上，并且所述导电件与所述顶盖绝缘连接；所述电极组件包括第一极耳和第二极耳，所述第一极耳和所述导电件焊接连接，所述第二极耳和所述底壁焊接连接。
  10. 一种电子设备，其特征在于，包括电子设备本体和权利要求1-9中任一项所述的扣式电池，所述扣式电池为所述电子设备本体提供电能。
  11. 一种扣式电池，其特征在于，包括：壳体、电芯和导电件；
    所述壳体包括底壳和顶盖，所述顶盖与所述底壳密封连接，所述底壳和所述顶盖围设形成用于容置所述电芯的容置腔，所述顶盖上设有与所述容置腔连通的通孔，所述导电件封盖在所述通孔上，并与所述顶盖之间通过密封胶圈绝缘且密封连接；
    所述导电件上还设有用于向所述容置腔内注入电解液的注液口，所述注液口上封盖有封口件，所述封口件与所述注液口之间密封连接；
    所述电芯具有第一极耳和第二极耳，所述第一极耳抵接在所述底壳的内底壁上，并与所述底壳的内底壁焊接，所述第二极耳与所述导电件电连接。
  12. 根据权利要求11所述的扣式电池，其特征在于，所述导电件上设有 穿设在所述通孔中的延伸部，所述延伸部伸入所述容置腔内，所述第二极耳与所述延伸部的朝向所述容置腔的一端电连接。
  13. 根据权利要求11所述的扣式电池，其特征在于，所述封口件为封口钉；所述注液口远离所述容置腔的一端上设有沉孔，所述沉孔的直径大于所述注液口，所述沉孔与所述注液口连通，所述封口钉位于所述沉孔内，并与所述沉孔密封连接。
  14. 根据权利要求13所述的扣式电池，其特征在于，所述封口钉与所述沉孔焊接。
  15. 根据权利要求11-14中任一项所述的扣式电池，其特征在于，所述电芯的中心处形成有电芯空腔，所述电芯空腔与所述壳体以及所述注液口同心设置。
  16. 根据权利要求11-14中任一项所述的扣式电池，其特征在于，所述顶盖上设有沉孔，所述导电件位于所述沉孔内，且所述导电件的上表面与所述顶盖的上表面平齐。
  17. 根据权利要求11-14中任一项所述的扣式电池，其特征在于，所述壳体的横截面的形状为圆形。
  18. 根据权利要求11-14中任一项所述的扣式电池，其特征在于，所述电芯为卷绕式电芯。
  19. 根据权利要求11-14中任一项所述的扣式电池，其特征在于，还包括抵接件，所述抵接件位于所述电芯空腔内，且与所述电芯空腔同心设置，所述抵接件的一端抵接在所述第一极耳上，以使所述第一极耳与所述底壳的内底壁贴合。
  20. 一种电子设备，其特征在于，包括电子设备本体和权利要求1-9中任一项所述的扣式电池；
    所述扣式电池为所述电子设备本体提供电能。
  21. 一种扣式电池的制造方法，其特征在于，包括如下步骤：
    将导电件封盖在顶盖的通孔上，使所述顶盖与所述导电件绝缘且密封的连接在一起；
    将电芯放置在底壳的容置腔内；
    用抵接件将所述电芯中的第一极耳抵接在所述底壳的内底壁上，使所述 第一极耳与所述底壳的内底壁贴合；
    将所述第一极耳焊接在所述底壳的内底壁上；
    将电芯中第二极耳与导电件电连接；
    去除所述抵接件，将电解液从所述导电件上的注液口注入至所述容置腔内，所述电解液注入完成后，用封口件封盖所述注液口，并与所述导电件密封连接。
  22. 根据权利要求21所述的扣式电池的制造方法，其特征在于，将所述第一极耳焊接在所述底壳的内底壁上之前，还包括：
    将具有导电件的顶盖与底壳密封连接。
  23. 根据权利要求21所述的扣式电池的制造方法，其特征在于，将所述第一极耳焊接在所述底壳的内底壁上之后，还包括：
    将具有导电件的顶盖与底壳密封连接。
  24. 根据权利要求21所述的扣式电池的制造方法，其特征在于，将顶盖和导电件绝缘且密封的连接在一起之前，还包括：
    对所述顶盖和所述导电件进行钝化处理。
  25. 根据权利要求21所述的扣式电池的制造方法，其特征在于，将导电件封盖在所述顶盖的通孔上，并使所述顶盖与所述导电件绝缘且密封的连接在一起的步骤包括：
    将导电件封盖在所述顶盖的通孔上，采用加热加压的方式，使所述顶盖与所述导电件绝缘且密封的连接在一起。
  26. 一种扣式电池的制造方法，其特征在于，包括如下步骤：
    将顶盖和导电件绝缘且密封的连接在一起，所述导电件封盖在所述顶盖的通孔上；
    将电芯中的第二极耳与所述导电件电连接；
    将与所述导电件电连接的电芯放置在底壳和具有导电件的顶盖围设形成的容置腔内；
    将具有导电件的顶盖与底壳密封连接；
    将所述电芯中的第一极耳与所述底壳焊接；
    将电解液从所述导电件上的注液口注入至所述容置腔内，所述电解液注入完成后，用封口件封盖所述注液口并与所述导电件密封连接。
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JP2023529378A (ja) 2023-07-10

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