WO2023006050A1 - 一种电池及电子产品 - Google Patents

一种电池及电子产品 Download PDF

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Publication number
WO2023006050A1
WO2023006050A1 PCT/CN2022/108782 CN2022108782W WO2023006050A1 WO 2023006050 A1 WO2023006050 A1 WO 2023006050A1 CN 2022108782 W CN2022108782 W CN 2022108782W WO 2023006050 A1 WO2023006050 A1 WO 2023006050A1
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WO
WIPO (PCT)
Prior art keywords
top cover
tab
battery
conductive member
edge
Prior art date
Application number
PCT/CN2022/108782
Other languages
English (en)
French (fr)
Inventor
王智峰
彭宁
Original Assignee
珠海冠宇电池股份有限公司
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Filing date
Publication date
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 JP2023573583A priority Critical patent/JP2024520219A/ja
Priority to KR1020237041096A priority patent/KR20240001247A/ko
Priority to EP22848655.1A priority patent/EP4333168A1/en
Publication of WO2023006050A1 publication Critical patent/WO2023006050A1/zh
Priority to US18/525,643 priority patent/US20240106093A1/en

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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
    • H01M50/147—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
    • 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
    • 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
    • H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular 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
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/155—Lids or covers characterised by the material
    • H01M50/157—Inorganic material
    • H01M50/159—Metals
    • 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
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/181—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/543—Terminals
    • H01M50/545—Terminals formed by the casing of the 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
    • H01M50/60—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
    • 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
    • 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 relates to the field of battery technology, in particular to a battery and an electronic product.
  • button batteries are widely used in various aspects of life. Aspects, especially in computer motherboards, wearable devices, calculators, electronic scales, toys and other electronic products.
  • the demand for button batteries continues to increase, and the quality improvement of button batteries has become a research hotspot.
  • a button battery usually includes a casing and a cover assembly, the casing is used to accommodate the cell body and the electrolyte, and the cover assembly is welded on the casing.
  • the positive tab of the cell body needs to be electrically connected to the conductive part in the cover plate assembly.
  • the conductive part is usually used as the positive terminal of the battery to supply power to the outside.
  • the present application provides a battery and an electronic product, which are used to at least improve the flatness and welding reliability of the tabs on the conductive parts.
  • a battery including:
  • a casing the casing includes a bottom wall and a side wall, the lower end of the side wall is connected to the edge of the bottom wall, and the bottom wall and the side wall enclose an accommodating cavity;
  • a cover plate assembly the cover plate assembly is arranged on the housing, the cover plate assembly includes: a conductive part and a top cover, the top cover is insulated and connected to the conductive part, and the conductive part includes a flat part and a boss part, the boss part is connected to the flat part, a through hole is opened in the center of the top cover, and the boss part extends into the through hole;
  • a cell body the cell body is accommodated in the accommodating cavity, the cell body is connected with a first tab and a second tab, the first tab is connected with the conductive member, the The second tab is connected to the housing.
  • the top cover is insulated and connected to the conductive member, a through hole is opened in the center of the top cover, and the boss portion of the conductive member extends upward to the through hole of the top cover. In the hole, the boss portion is used as the positive terminal of the battery.
  • the conductive member Since the conductive member has a larger lower surface, it can be used to weld the first tab, increasing the welding area, which is convenient for the first tab to connect with the first tab.
  • the welding operation of the conductive parts is less prone to false welding and ensures reliable welding, which is conducive to improving the smoothness and welding reliability of the welding connection between the first tab and the conductive parts, improving the quality of the battery, and improving the reliability of the battery. Yield rate.
  • the side of the top cover facing away from the conductive element is the first surface
  • the side of the top cover facing the conductive element is the second surface
  • the edge of the second surface is set
  • the step is recessed from the second surface to the first surface
  • the upper end of the side wall has an opening
  • the top wall of the step is against the upper end of the side wall.
  • the step surrounds the edge of the second surface; the depth H1 of the step being recessed from the second surface to the first surface ranges from 0.05 mm to 0.15 mm; and /or
  • the distance D between the inner wall of the step and the edge of the first surface ranges from 0.1 mm to 0.2 mm.
  • the thickness T of the top cover ranges from 0.1 mm to 0.2 mm; and/or the diameter of the flat portion is smaller than the diameter of the second surface of the top cover.
  • the inner diameter of the through hole is larger than the diameter of the boss portion, and the inner diameter of the through hole is smaller than the diameter of the flat portion.
  • the top end of the boss portion is flush with the first surface; or the top end of the boss portion is lower than the first surface.
  • the first tab is connected to the flat part, and the second tab is connected to the bottom wall of the housing.
  • the first tab is connected to the flattened portion by laser welding, and the welding spot of laser welding is located at the center of the flattened portion;
  • the end of the first tab close to the edge of the conductive element has a limit edge, and the distance H2 between the limit edge and the edge of the conductive element is smaller than the welding spot between the limit edge and the laser welding The distance from the center of H3.
  • a liquid injection hole communicating with the accommodating cavity is opened on the bottom wall, and a sealing piece is provided at the lower end of the bottom wall, and the sealing piece is sealingly connected to the injection hole. on the fluid hole.
  • the top cover is a stainless steel top cover; a nickel layer is electroplated on the top cover, and the thickness of the nickel layer is 0.5 ⁇ m to 5 ⁇ m; and/or the top cover passes through an insulating member The insulation is connected to the conductive member.
  • the present application also provides an electronic product, including the above-mentioned battery.
  • the structure of the conductive member and the top cover is simple, and there is no need to open a liquid injection hole on the conductive member, so the molding process of the conductive member and the top cover is improved.
  • Simplification the equipment for processing the conductive parts and the top cover is simplified, and welding of sealing nails on the cover plate assembly is avoided, which can reduce processing difficulty and production cost, improve the yield rate of battery production, and ensure stable battery operation.
  • the step is provided around the edge of the second surface, it is convenient to press the inner wall of the step against the inner wall of the side wall, and it is convenient to realize all the steps by welding.
  • the top cover is sealingly connected with the housing.
  • the energy required for the laser welding connection between the top cover and the casing can be effectively reduced, and the damage caused by laser welding to the battery core body can be reduced. impact, thereby improving the quality of the battery.
  • the inner diameter of the through hole is larger than the diameter of the boss portion, which facilitates passing the boss portion through the through hole; the inner diameter of the through hole is smaller than that of the flat portion The diameter can prevent the flat part from protruding upward from the through hole, thereby ensuring that the cover plate assembly is easy to install and stable in use.
  • the liquid injection hole is opened on the bottom wall of the casing, compared with the prior art where the liquid injection hole is opened on the top cover, the top cover can be simplified.
  • the processing technology of the cover, and the sealing member is sealed at the lower end of the liquid injection hole to prevent electrolyte leakage and ensure the sealing effect.
  • the batteries and electronic products provided by the embodiments of the present application can solve Other technical problems, other technical features contained in the technical solution and the beneficial effects brought by these technical features will be further described in detail in the specific implementation.
  • FIG. 1 is a schematic diagram of a three-dimensional structure of an existing battery
  • FIG. 2 is a schematic diagram of a three-dimensional structure of a battery provided in an embodiment of the present application
  • FIG. 3 is a cross-sectional view of a battery provided in an embodiment of the present application.
  • FIG. 4 is a schematic perspective view of the three-dimensional structure of the battery cover assembly provided by the embodiment of the present application.
  • Fig. 5 is a half-sectional view of the battery cover assembly provided by the embodiment of the present application.
  • FIG. 6 is another schematic structural view of the battery cover assembly provided by the embodiment of the present application.
  • FIG. 7 is a half-sectional view of the top cover of the battery provided in the embodiment of the present application.
  • Fig. 8 is an enlarged view of the local structure at A of Fig. 5 of the battery provided by the embodiment of the present application;
  • FIG. 9 is a schematic structural diagram of welding the first tab on the cover assembly of the battery provided in the embodiment of the present application.
  • the cell body is housed in the housing 10
  • the cover plate assembly 30 includes a housing cover 80 , a conductive member 31 and an insulating member 33 , and the housing cover 80 is welded on the housing 10 .
  • the conductive member 31 is insulated and connected to the case cover 80 through the insulating member 33, and a through hole is opened in the center of the case cover 80.
  • the lower end of the conductive member 31 has a protrusion, and the protrusion is downward from the through hole opened in the center of the case cover 80 Extending to be flush with the lower surface of the case cover 80, the first tab connected to the cell body is welded to the protrusion of the conductive member 31, and the second tab connected to the cell body is connected to the bottom wall of the housing 10
  • Welding connection in this battery structure, because the lower surface area of the protruding part protruding downward is small, it is inconvenient to weld the first tab on the protruding part, and problems such as virtual welding are prone to occur, which will affect the connection between the first tab and the electrical connection.
  • the connection strength of the component 31 affects the smoothness of the first tab welding, affects the quality of the battery, and is not conducive to the improvement of the yield rate of the battery.
  • the present application has improved the structure of the battery, specifically the structure of the cover plate assembly 30 , the cover plate assembly 30 includes: a conductive member 31 and a top cover 32 ,
  • the conductive member 31 includes a flat portion 311 and a boss portion 312 , and the boss portion 312 is connected to the flat portion 311 .
  • the top cover 32 is insulated and connected to the conductive member 31, the center of the top cover 32 is provided with a through hole 321, and the boss portion 312 extends upwards through the through hole 321 until it is flat with the upper surface of the top cover 32.
  • the entire lower surface of the flat part 311 connected to the boss part 312 can be used for welding the first tab, which can increase the welding area and facilitate the welding operation of the first tab on the flat part 311, thereby ensuring
  • the welding is reliable, which is conducive to improving the smoothness and welding reliability of the first tab welding, and improving the quality of the battery.
  • such a structure does not need to process a liquid injection hole on the cover plate assembly 30, nor does it need to weld sealing nails on the cover plate assembly 30, which can effectively reduce the processing difficulty of the cover plate assembly 30, thereby improving the yield rate of the battery .
  • a battery provided by the present application includes: a housing 10, a cover plate assembly 30 disposed on the housing 10, and a cell body 20 disposed in the housing 10, the battery cell
  • the body 20 is connected with a first tab 40 and a second tab 50
  • the second tab 50 is connected with the housing 10
  • the cover assembly 30 includes: a conductive part 31 and a top cover 32, the top cover 32 is insulated and connected to the conductive part 31, the first tab 40 is connected to the conductive member 31, the conductive member 31 includes a flat part 311 and a boss part 312, and the boss part 312 is connected to the flat part 311;
  • the center of the top cover 32 is provided with a through hole 321, the convex The mesa 312 extends into the through hole 321 .
  • the larger lower surface of the flat part 311 can increase the welding area, which is convenient for the first tab.
  • the welding operation between 40 and conductive member 31 reduces the occurrence of false welding and ensures welding strength, which is conducive to improving the flatness and firmness of welding of the first tab 40 and improving the quality of the battery.
  • the structure of the conductive member 31 and the top cover 32 is simple, and there is no need to open a liquid injection hole on the conductive member 31, so the forming process of the conductive member 31 and the top cover 32 is simplified, and the processing of conductive parts
  • the equipment of part 31 and top cover 32 has been simplified, which can save production cost and improve the yield rate of battery production.
  • FIGS. it has a good insulation effect and ensures the stable operation of the battery.
  • the insulating member 33 may be a glue layer formed after the insulating glue is solidified, for example, the insulating glue may be PP glue.
  • the top cover 32 can be insulated and connected to the conductive member 31 through PP glue by heating and pressing, which is conducive to improving the bonding performance of the insulating glue sealing connection and ensuring that the connection between the conductive member 31 and the top cover 32 is tight and not easy to loosen.
  • the conductive member 31 is circular, the top cover 32 is annular, and the boss portion 312 of the conductive member 31 is arranged coaxially with the top cover 32 . Since the top cover 32 is in the shape of a ring, the insulator 33 is also in the shape of a ring to ensure that the top cover 32 is connected to the conductive member 31 in all directions.
  • the boss portion 312 can be integrally formed with the flat portion 311, the boss portion 312 is a solid structure protruding from the upper surface of the flat portion 311, and the flat portion The lower surface of 311 is a plane.
  • the side of the top cover 32 facing away from the conductive element 31 is the first surface 323, and the side of the top cover 32 facing the conductive element 31 is the second surface 324, as shown in Figures 2 and 8, for To facilitate disposing the cover plate assembly 30 on the housing 10 , a step 322 is provided on the edge of the second surface 324 , and the step 322 is recessed from the second surface 324 to the first surface 323 .
  • the energy required for the laser welding connection between the top cover 32 and the casing 10 can be reduced, and the influence of the laser welding on the cell body 20 can be reduced, thereby improving the quality of the battery.
  • the housing 10 includes a bottom wall 12 and a side wall 13, the lower end of the side wall 13 is connected to the edge of the bottom wall 12, the bottom wall 12 and the side wall 13 enclose an accommodating cavity 11, and the side wall
  • the upper end of the wall 13 has an opening 131 , and the top wall of the step 322 abuts against the upper end of the side wall 13 .
  • the step 322 of the top cover 32 and the side surrounding wall 13 are sealed and connected by welding.
  • the step 322 surrounds the edge of the second surface 324 for a week, and the value of the depth H1 of the step 322 from the second surface 324 to the first surface 323 is in the range of 0.05 mm to 0.15 mm, and/or, the inner wall of the step 322 is in contact with the first surface
  • the value range of the distance D between the edges of 323 is 0.1mm ⁇ 0.2mm, that is, the value range of the distance D between the edge of the second surface 324 and the edge of the first surface 323 is 0.1mm ⁇ 0.2mm. This facilitates the inner wall of the step 322 against the inner wall of the side wall 13 , and realizes the sealing connection between the top cover 32 and the housing 10 by welding.
  • the top wall of the step 322 is the first step wall 3221
  • the inner wall of the step 322 is the second step wall 3222
  • the second step wall 3222 is against the inner wall surface of the side wall 13
  • the step 322 The first stepped wall 3221 abuts against the upper end of the side wall 13 of the casing 10 .
  • the distance D between the inner wall of the step 322 and the edge of the first surface 323 is 0.1mm, 0.15mm, or 0.2mm
  • the step 322 extends from the second surface 324 to the
  • the depth H1 of the depression on the first surface 323 is 0.05 mm, 0.10 mm or 0.15 mm. So that the step 322 abuts against the upper end of the side wall 13 of the casing 10 .
  • Setting the step 322 can realize the thinning of the edge of the second surface 324.
  • the energy consumption required for welding can be reduced, which is conducive to the smooth realization of welding, and can also reduce the welding to accommodate
  • the impact caused by the battery core body 20 in the casing 10 improves the quality of the battery.
  • the side wall 13 is in the shape of a ring, and the lower end of the side wall 13 is integrally formed with the bottom wall 12 .
  • the diameter of the flat portion 311 is smaller than the diameter of the second surface 324 of the top cover 32 .
  • the through hole 321 is circular. It is easy to understand that the inner diameter of the through hole 321 is larger than the diameter of the boss portion 312, and the inner diameter of the through hole 321 is smaller than the diameter of the flat portion 311. Such a structure facilitates passing the boss portion 312 through the through hole 321, and can also avoid The flat portion 311 protrudes upward from the through hole 321 to ensure that the cover assembly 30 is conveniently installed and stable in use.
  • the top end of the boss portion 312 is flush with the first surface 323 ; or in another possible implementation manner, the top end of the boss portion 312 is lower than the first surface 323 .
  • Such a structure can effectively avoid an increase in the overall height of the battery and make the battery more compact, thereby improving the energy density of the battery.
  • the thickness T of the top cover 32 ranges from 0.1 mm to 0.2 mm. In a possible implementation manner, the thickness T of the top cover 32 may be 0.1 mm, 0.15 mm or 0.2 mm.
  • the thickness T of the top cover 32 is greater than the depth H1 of the step 322 recessed from the second surface 324 to the first surface 323 .
  • the thickness T of the top cover 32 is 0.2 mm
  • the depth H1 of the step 322 recessed from the second surface 324 to the first surface 323 is 0.15 mm.
  • the conductive member 31 is a metal aluminum conductive member.
  • the top cover 32 is a stainless steel top cover; a nickel layer is electroplated on the top cover 32, and the thickness of the nickel layer is 0.5 ⁇ m ⁇ 5 ⁇ m. In a possible implementation manner, the thickness of the nickel layer is 0.5 ⁇ m, 1 ⁇ m, 4 ⁇ m or 5 ⁇ m. Electroplating the nickel layer on the top cover 32 is helpful to realize the insulating connection of the top cover 32 to the conductive member 31 , especially to help the top cover 32 to be insulated and connected to the conductive member 31 through PP glue.
  • the thickness of the nickel layer is 2 ⁇ m ⁇ 3 ⁇ m.
  • the thickness of the nickel layer is 2 ⁇ m, 2.5 ⁇ m, or 3 ⁇ m.
  • a cell body 20 is provided in the accommodating cavity 11, and a first tab 40 and a second tab 50 are electrically connected to the cell body 20, the first tab 40 is connected to the flat portion 311, and the second tab 40
  • the dipole lug 50 is connected to the bottom wall 12 of the housing 10 .
  • the first tab 40 is connected to the flat part 311 to realize the conduction between the first tab 40 and the flat part 311, and the second tab 50 is connected to the bottom wall 12 of the housing 10 to realize the connection between the second tab 50 and the housing 10.
  • the bottom walls 12 are connected, one of the first tab 40 and the second tab 50 is a positive tab, and the other is a negative tab.
  • the cell body 20 includes several positive electrode sheets and several negative electrode sheets alternately stacked, the positive electrode sheets and the negative electrode sheets are spaced apart from each other, and a separator is also arranged between the positive electrode sheets and the negative electrode sheets, In order to separate the positive electrode sheet from the negative electrode sheet, prevent the short circuit caused by the contact between the positive electrode sheet and the negative electrode sheet.
  • the separator also has the function of allowing the electrolyte ions in the electrolyte to pass through.
  • the first tab 40 is a positive tab
  • the second tab 50 is a negative tab
  • the positive tab is connected to the positive tab
  • the negative tab is connected to the negative tab
  • the first tab 40 is connected to the flat part 311 Connect by laser welding, so that the boss portion 312 of the conductive member 31 becomes the positive pole of the battery provided in this embodiment
  • the second tab 50 is connected to the bottom wall 12 of the housing 10 by laser welding or resistance welding, So that the bottom wall 12 of the casing 10 becomes the negative pole of the battery provided in this embodiment.
  • the conductive member 31 can be made of metal or other materials.
  • the electric energy generated on the cell body 20 is output through the casing 10 and the conductive member 31 to provide electric energy for external electrical equipment, or, when the battery is a rechargeable battery , and when the external charging device is charging, the electric energy is transmitted to the cell body 20 through the casing 10 and the conductive member 31 for charging.
  • the first tab 40 and the flat part 311 are connected by laser welding, so as to realize the conduction between the first tab 40 and the flat part 311 , and the welding spot of laser welding 60 is located at the center of the flattened portion 311 .
  • One end of the first tab 40 is connected to the cell body 20, the other end of the first tab 40 extends to the outside of the cell body 20, and the first tab 40 extending to the outside of the cell body 20 is wrapped with tab glue, In particular, the part of the first tab 40 connected to the flat portion 311 by laser welding does not need to be wrapped with tab glue.
  • the end of the first tab 40 near the edge of the conductive member 31 has a limiting edge 41, and the distance H2 between the limiting edge 41 and the edge of the conductive member 31 is smaller than that between the limiting edge 41 and the laser welding.
  • the distance H3 between the centers of the solder joints 60 is conducive to improving the stability of the welding of the conductive member 31,
  • the bottom wall 12 is provided with a liquid injection hole 121 communicating with the accommodating chamber 11 , and the lower end of the bottom wall 12 is also provided with a sealing member 14 , and the sealing member 14 is sealingly connected to the liquid injection hole 121 .
  • the liquid injection hole 121 is used for injecting the electrolyte solution into the accommodating chamber 11 , and the sealing member 14 abuts against the liquid injection hole 121 to seal the liquid injection hole 121 to improve the safety of the battery.
  • the sealing member 14 may be in the shape of a sheet, and the sealing member 14 may be embedded in the bottom wall 12, and the sealing member 14 is connected to the bottom wall 12 by welding, and the sealing member 14 is blocked in the liquid injection hole. 121 to prevent the electrolyte from leaking out from the injection hole 121.
  • the sealing member 14 has a stopper that is compatible with the liquid injection hole 121.
  • the liquid injection hole 121 is a circular hole, and the stopper is a cylindrical plug, which can be inserted into the In the liquid injection hole 121, the liquid injection hole 121 is blocked, and the sealing member 14 is blocked on the lower end surface of the liquid injection hole 121.
  • the lower end surface of the liquid injection hole 121 prevents the electrolyte from leaking and achieves a sealing effect.
  • the sealing part 14 can be embedded in the bottom wall 12, and the lower surface of the sealing part 14 is flush with the lower surface of the bottom wall 12, so as to prevent the lower end of the sealing part 14 from protruding and occupying the installation space of the battery.
  • the junction of the sealing member 14 and the liquid injection hole 121 can be welded to improve the sealing effect.
  • a kind of battery provided in this embodiment since the liquid injection hole 121 is opened on the bottom wall 12, compared with the prior art in which the liquid injection hole 121 is opened on the top cover 32, the processing technology of the top cover 32 can be simplified, saving The production cost of the battery can also improve the aesthetics of the battery.
  • the battery provided in this embodiment is a button battery.
  • the present application also provides an electronic product, including the above-mentioned battery.
  • the battery is connected and conducted with the positive pole of the electronic product through the boss portion 312 of the conductive member 31, and connected with the negative pole of the electronic product through the housing 10, thereby supplying power to the electronic product.
  • An electronic product in this application includes, but is not limited to, computer motherboards, electronic watches, electronic dictionaries, electronic scales, remote controls, electric toys, cardiac pacemakers, electronic hearing aids, counters, and cameras that include the above-mentioned batteries.
  • connection should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or Become one; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can make the internal communication of two components or the interaction relationship between two components.
  • connection can be a fixed connection or a detachable connection, or Become one; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can make the internal communication of two components or the interaction relationship between two components.

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

Abstract

本申请提供一种电池及电子产品。其中，本申请提供的一种电池，包括：壳体、盖板组件和电芯本体，所述盖板组件设置在所述壳体上，所述盖板组件包括：导电件和顶盖，所述顶盖绝缘连接在所述导电件上，所述导电件包括平整部和凸台部，所述凸台部连接在所述平整部上，所述顶盖的中心开设有通孔，所述凸台部延伸到所述通孔内，所述电芯本体容纳在所述壳体内，所述电芯本体连接有第一极耳和第二极耳，所述第一极耳与所述导电件连接，所述第二极耳与所述壳体连接。本申请提供的一种电池及电子产品，用以至少提高极耳在导电件上焊接的平整度和焊接的可靠性。

Description

一种电池及电子产品
本申请要求于2021年07月30日提交中国专利局、申请号为202121778184.6、申请名称为“一种电池及电子产品”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
本申请涉及电池技术领域，尤其涉及一种电池及电子产品。
背景技术
随着锂离子电池技术的发展，特别是具有安全性高、能量密度高等优点的扣式电池的面世，为电子产品的供电带来了极大的便利，扣式电池被广泛应用在生活的各个方面，尤其是电脑主板、穿戴设备、计算器、电子秤、玩具等电子产品中。扣式电池的需求量不断增大，扣式电池的品质提升成为研究的热点。
目前，扣式电池通常包括壳体和盖板组件，壳体内用于容纳电芯本体和电解液，盖板组件焊接在壳体上。在该扣式电池的结构中，电芯本体的正极耳需要与盖板组件中的导电件电连接，导电件通常作为电池的正极端向外供电，但是由于现有的电池结构的局限性，影响着极耳在导电件上焊接的平整度和焊接的可靠性，这会对极耳焊接的效果带来不利影响。
发明内容
本申请提供一种电池及电子产品，用以至少提高极耳在导电件上焊接的平整度和焊接的可靠性。
为了实现上述目的，本申请提供一种电池，包括：
壳体，所述壳体包括底壁和侧围壁，所述侧围壁的下端连接在所述底壁的边缘，所述底壁和所述侧围壁围成容置腔；
盖板组件，所述盖板组件设置在所述壳体上，所述盖板组件包括：导电 件和顶盖，所述顶盖绝缘连接在所述导电件上，所述导电件包括平整部和凸台部，所述凸台部连接在所述平整部上，所述顶盖的中心开设有通孔，所述凸台部延伸到所述通孔内；
电芯本体，所述电芯本体容纳在所述容置腔内，所述电芯本体连接有第一极耳和第二极耳，所述第一极耳与所述导电件连接，所述第二极耳与所述壳体连接。
本申请提供的一种电池中，所述顶盖绝缘连接在所述导电件上，所述顶盖的中心开设有通孔，所述导电件的凸台部向上延伸到所述顶盖的通孔内，所述凸台部作为电池的正极端，由于所述导电件具有较大的下表面可以用于焊接所述第一极耳，增大焊接的面积，便于所述第一极耳与所述导电件的焊接作业，不易发生虚焊，保证焊接牢靠，有利于提高所述第一极耳与所述导电件焊接连接的平整度和焊接的可靠性，提高电池的品质，提高电池的良品率。
在一种可能实施的方式中，所述顶盖背向所述导电件的一面为第一面，所述顶盖面向所述导电件的一面为第二面，所述第二面的边缘设置有台阶，所述台阶自所述第二面向所述第一面凹陷；所述侧围壁的上端具有开口，所述台阶的顶壁抵在所述侧围壁的上端。
在一种可能实施的方式中，所述台阶环绕所述第二面的边缘一周；所述台阶自所述第二面向所述第一面凹陷的深度H1的范围为0.05mm～0.15mm；和/或
所述台阶的内壁与所述第一面的边缘之间的距离D的范围为0.1mm～0.2mm。
在一种可能实施的方式中，所述顶盖的厚度T的范围为0.1mm～0.2mm；和/或所述平整部的直径小于所述顶盖的第二面的直径。
在一种可能实施的方式中，所述通孔的内径大于所述凸台部的直径，且所述通孔的内径小于所述平整部的直径。
在一种可能实施的方式中，所述凸台部的顶端与所述第一面平齐；或所述凸台部的顶端低于所述第一面。
在一种可能实施的方式中，所述第一极耳与所述平整部连接，所述第二极耳与所述壳体的底壁连接。
在一种可能实施的方式中，所述第一极耳与所述平整部通过激光焊接连接，激光焊接的焊点位于所述平整部的中心；
所述第一极耳靠近所述导电件边缘的一端具有限位边，所述限位边与所述导电件的边缘之间的距离H2小于所述限位边与所述激光焊接的焊点的中心的距离H3。
在一种可能实施的方式中，所述底壁上开设有与所述容置腔连通的注液孔，所述底壁的下端还设置有封口件，所述封口件密封连接在所述注液孔上。
在一种可能实施的方式中，所述顶盖为不锈钢顶盖；所述顶盖上电镀有镍层，所述镍层的厚度为0.5μm～5μm；和/或所述顶盖通过绝缘件绝缘连接在所述导电件上。
本申请还提供一种电子产品，包括上述的电池。
本申请提供的一种电池中，所述导电件和所述顶盖的结构简单，不需要在所述导电件上开设注液孔，因而所述导电件和所述顶盖的成型工艺得到了简化，加工所述导电件和所述顶盖的设备得到了简化，也避免了在盖板组件焊接密封钉，可降低加工难度和生产成本，提高电池生产的良品率，确保电池工作稳定。
本申请提供的一种电池中，由于设置了所述台阶环绕所述第二面的边缘一周，便于将所述台阶的内壁抵在所述侧围壁的内壁面，方便通过焊接的方式实现所述顶盖与所述壳体密封连接。
本申请提供的一种电池中，通过设置所述台阶，可有效降低所述顶盖与所述壳体之间激光焊接连接时所需的能量，减小激光焊接对所述电芯本体造成的影响，从而提高电池的品质。
本申请提供的一种电池中，所述通孔的内径大于所述凸台部的直径，方便将所述凸台部穿过所述通孔；所述通孔的内径小于所述平整部的直径，可以避免所述平整部从所述通孔向上脱出，从而确保所述盖板组件方便安装，使用稳定。
本申请提供的一种电池中，将所述注液孔开设在所述壳体的底壁上，相对于现有技术中在所述顶盖上开设所述注液孔，可以简化所述顶盖的加工工艺，并且所述封口件密封在所述注液孔的下端，防止电解液泄漏，保证密封效果。
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电池及电子产品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以简单地介绍，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性的前提下，还可以根据这些附图获得其他的附图。
图1为现有的电池的立体结构示意图；
图2为本申请实施例提供的电池的立体结构示意图；
图3为本申请实施例提供的电池的剖视图；
图4为本申请实施例提供的电池的盖板组件的立体结构示意图；
图5为本申请实施例提供的电池的盖板组件的半剖视图；
图6为本申请实施例提供的电池的盖板组件的又一立体结构示意图；
图7为本申请实施例提供的电池的顶盖的半剖视图；
图8为本申请实施例提供的电池的图5的A处局部结构放大图；
图9为本申请实施例提供的电池的盖板组件上焊接第一极耳的结构示意图。
附图标记说明：
10-壳体；
11-容置腔；
12-底壁；
121-注液孔；
13-侧围壁；
131-开口；
14-封口件；
20-电芯本体；
30-盖板组件；
31-导电件；
311-平整部；
312-凸台部；
32-顶盖；
321-通孔；
322-台阶；
3221-第一台阶壁；
3222-第二台阶壁；
323-第一面；
324-第二面；
33-绝缘件；
40-第一极耳；
41-限位边；
50-第二极耳；
60-焊点；
70-密封钉；
80-壳盖。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合本申请中的附图，对本申请中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，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作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
参考图1所示，在相关的电池结构中，电芯本体容纳在壳体10内，盖板组件30包括壳盖80、导电件31和绝缘件33，壳盖80焊接在壳体10上，导电件31通过绝缘件33绝缘连接在壳盖80上，且在壳盖80中心开设有通孔，导电件31的下端具有凸出部，凸出部从壳盖80中心开设的通孔向下延伸到与壳盖80的下表面平齐，电芯本体上连接的第一极耳与导电件31的凸出部焊接连接，电芯本体上连接的第二极耳与壳体10的底壁焊接连接，该电池结 构中，由于凸出部向下凸出的下表面积较小，因而在凸出部上焊接第一极耳作业不便，容易发生虚焊等问题，影响第一极耳与导电件31的连接强度，影响第一极耳焊接的平整度，影响电池的品质，不利于电池的良品率提高。
此外，该电池结构中，需要在盖板组件30上加工出注液孔，使得导电件31和壳盖80的结构复杂，因而增加了电池的加工制造过程的难度，并且，壳盖80和密封钉70通常都采用铝材，难以实现密封钉70的良好焊接，影响电池的良品率。
鉴于上述背景，参考图2和图3所示，本申请对电池的结构进行了改进，具体是对盖板组件30的结构做了改进，盖板组件30包括：导电件31和顶盖32，导电件31包括平整部311和凸台部312，凸台部312连接在平整部311上。参考图4和图5所示，顶盖32绝缘连接在导电件31上，顶盖32的中心开设有通孔321，凸台部312通过通孔321向上延伸到与顶盖32的上表面平齐，从而使得与凸台部312连接的平整部311整个下表面都可以用于焊接第一极耳，可以增大焊接的面积，便于第一极耳在平整部311上的焊接作业，从而保证焊接牢靠，有利于提高第一极耳焊接的平整度和焊接的可靠性，提高电池的品质。
此外，这样的结构也不需要在盖板组件30上加工出注液孔，也不需要在盖板组件30上焊接密封钉，可以有效降低盖板组件30的加工难度，从而提高电池的良品率。
下面参考附图描述本申请实施例提供的电池及电子产品。
参考图2和图3所示，本申请提供的一种电池，包括：壳体10、设置在壳体10上的盖板组件30、以及设置在壳体10内的电芯本体20，电芯本体20上连接有第一极耳40和第二极耳50，第二极耳50与壳体10连接，盖板组件30包括：导电件31和顶盖32，顶盖32绝缘连接在导电件31上，第一极耳40与导电件31连接，导电件31包括平整部311和凸台部312，凸台部312连接在平整部311上；顶盖32的中心开设有通孔321，凸台部312延伸到通孔321内。
本实施例提供的一种电池中，由于与凸台部312连接的平整部311用于焊接第一极耳40，平整部311较大的下表面可以增大焊接的面积，便于第一极耳40与导电件31的焊接作业，减小发生虚焊，保证焊接强度，有利于提 高第一极耳40焊接的平整度和焊接的牢固性，提高电池的品质。
本实施例提供的一种电池中，导电件31和顶盖32的结构简单，不需要在导电件31上开设注液孔，因而导电件31和顶盖32的成型工艺得到了简化，加工导电件31和顶盖32的设备得到了简化，可节约生产成本，提高电池生产的良品率。此外，本实施例提供的电池中，参考图3和图4所示，由于导电件31的凸台部312延伸到通孔321内，凸台部312作为电池的正极端，通过设置绝缘件33起到良好的绝缘效果，确保电池工作稳定。
参考图4和图5所示，绝缘件33可以为绝缘胶凝固后形成的胶层，例如，绝缘胶可以为PP胶。可以采用加热加压的方式将顶盖32通过PP胶绝缘连接在导电件31上，有利于提高绝缘胶密封连接的粘结性能，确保导电件31与顶盖32之间连接紧密不易松脱。
在一种可能实施的方式中，导电件31呈圆形，顶盖32呈圆环状，导电件31的凸台部312与顶盖32同轴线设置。由于顶盖32呈圆环状，因而绝缘件33也呈圆环状，确保顶盖32全方位连接在导电件31上。
在一种可能实施的方式中，参考图5和图6所示，凸台部312可以与平整部311为一体成型，凸台部312为平整部311的上表面凸出的实心结构，平整部311的下表面为平面。
参考图5和图7所示，顶盖32背向导电件31的一面为第一面323，顶盖32面向导电件31的一面为第二面324，参考图2和图8所示，为了方便将盖板组件30设置在壳体10上，第二面324的边缘设置有台阶322，台阶322自第二面324向第一面323凹陷。通过设置台阶322，可降低顶盖32与壳体10之间激光焊接连接时所需的能量，减小激光焊接对电芯本体20带来的影响，从而提高电池的品质。
参考图2所示，壳体10包括底壁12和侧围壁13，侧围壁13的下端连接在底壁12的边缘，底壁12和侧围壁13围成容置腔11，侧围壁13的上端具有开口131，台阶322的顶壁抵在侧围壁13的上端。并使用焊接的方式密封连接顶盖32的台阶322与侧围壁13。
台阶322环绕第二面324的边缘一周，台阶322自第二面324向第一面323凹陷的深度H1的数值的范围为0.05mm～0.15mm，和/或，台阶322的内壁与第一面323的边缘之间的距离D的数值的范围为0.1mm～0.2mm，即第二 面324的边缘与第一面323的边缘之间的距离D的数值的范围为0.1mm～0.2mm。这样便于将台阶322的内壁抵在侧围壁13的内壁面，方便通过焊接的方式实现顶盖32与壳体10密封连接。
参考图3和图8所示，台阶322的顶壁为第一台阶壁3221，台阶322的内壁为第二台阶壁3222，第二台阶壁3222抵在侧围壁13的内壁面，台阶322的第一台阶壁3221抵在壳体10的侧围壁13的上端。
在一种可能实施的方式中，参考图8所示，台阶322的内壁与第一面323的边缘之间的距离D为0.1mm、0.15mm、或者0.2mm，台阶322自第二面324向第一面323凹陷的深度H1为0.05mm、0.10mm或0.15mm。以使得台阶322抵在壳体10的侧围壁13的上端。
设置台阶322可实现减薄第二面324的边缘，在将盖板组件30焊接到壳体10上时，可以减少焊接所需的能耗，有利于顺利实现焊接，也可减小焊接对容纳在壳体10内的电芯本体20造成的影响，从而提高电池的品质。
参考图2所示，侧围壁13为环形状，侧围壁13的下端与底壁12一体成型。
参考图2和图8所示，为了确保将盖板组件30焊接到壳体10上时，平整部311不会伸出顶盖32的台阶322，影响台阶322抵在侧围壁13的上端，因而平整部311的直径小于顶盖32的第二面324的直径。
在一种可能实施的方式中，参考图4和图5所示，通孔321呈圆形。容易理解的是，通孔321的内径大于凸台部312的直径，且通孔321的内径小于平整部311的直径，这样的结构，方便将凸台部312穿过通孔321，也可以避免平整部311从通孔321向上脱出，确保盖板组件30方便安装，使用稳定。
在一种可能实施的方式中，凸台部312的顶端与第一面323平齐；或在另一种可能实施的方式中，凸台部312的顶端低于第一面323。这样的结构，可以有效避免电池的整体高度增高，使得电池更加紧凑，从而有利于提高电池的能量密度。
参考图8所示，顶盖32的厚度T的数值的范围为0.1mm～0.2mm，在一种可能实施的方式中，顶盖32的厚度T可以为0.1mm、0.15mm或0.2mm。
容易理解的是，顶盖32的厚度T大于台阶322自第二面324向第一面 323凹陷的深度H1。例如，顶盖32的厚度T为0.2mm，台阶322自第二面324向第一面323凹陷的深度H1为0.15mm。
在一种可能实施的方式中，导电件31为金属铝导电件。
在一种可能实施的方式中，顶盖32为不锈钢顶盖；顶盖32上电镀有镍层，镍层的厚度为0.5μm～5μm。在一种可能实施的方式中，镍层的厚度为0.5μm、1μm、4μm或5μm。在顶盖32上电镀镍层，有助于实现顶盖32绝缘连接在导电件31上，特别是有助于顶盖32通过PP胶绝缘连接在导电件31上。
在一种可能实施的方式中，镍层的厚度为2μm～3μm。例如镍层的厚度为2μm、2.5μm、或3μm。
参考图2所示，容置腔11内设置有电芯本体20，电芯本体20上电连接有第一极耳40和第二极耳50，第一极耳40与平整部311连接，第二极耳50与壳体10的底壁12连接。第一极耳40与平整部311连接实现第一极耳40与平整部311之间导通，第二极耳50与壳体10的底壁12连接实现第二极耳50与壳体10的底壁12之间导通，第一极耳40和第二极耳50其中的一个为正极耳，其中的另有一个为负极耳。
在一种可能实施的方式中，电芯本体20包括交替层叠设置的若干个正极片和若干个负极片，正极片和负极片相互间隔，且在正极片和负极片之间还设置有隔膜，以使正极片和负极片隔开，防止正极片和负极片接触而短路，此外，隔膜还具有能使电解液中的电解质离子通过的功能。
在一种可能实施的方式中，第一极耳40为正极耳，第二极耳50为负极耳，正极片与正极耳连接，负极片与负极耳连接，第一极耳40与平整部311通过激光焊接的方式连接，以使得导电件31的凸台部312成为本实施例提供的电池的正极，第二极耳50与壳体10的底壁12通过激光焊接或者电阻焊接的方式连接，以使得壳体10的底壁12成为本实施例提供的电池的负极。
导电件31可以为金属材质也可以为其他材质，电芯本体20上产生的电能通过壳体10和导电件31向外输出，为外接用电设备提供电能，或者，当电池为可充电的电池时，并且外接充电设备充电时，通过壳体10和导电件31将电能传输至电芯本体20进行充电。
在一种可能实施的方式中，参考图2和图9所示，第一极耳40与平整部 311通过激光焊接连接，实现第一极耳40与平整部311导通，激光焊接的焊点60位于平整部311的中心。
第一极耳40的一端与电芯本体20连接，第一极耳40的另一端延伸到电芯本体20外侧，且延伸到电芯本体20外侧的第一极耳40上包裹极耳胶，特别的，第一极耳40上与平整部311通过激光焊接连接的部分不用包裹极耳胶。
参考图2和图9所示，第一极耳40靠近导电件31边缘的一端具有限位边41，限位边41与导电件31的边缘之间的距离H2小于限位边41与激光焊接的焊点60的中心的距离H3。这样有利于提高导电件31焊接的稳定性，
底壁12上开设有与容置腔11连通的注液孔121，底壁12的下端还设置有封口件14，封口件14密封连接在注液孔121上。
注液孔121用于向容置腔11内注入电解液，封口件14抵在注液孔121上将注液孔121密封，提高电池使用的安全性。
在一种可能实施的方式中，封口件14可以为薄片状，封口件14可以是嵌在底壁12内，封口件14通过焊接的方式与底壁12连接，封口件14阻挡在注液孔121的一端，避免电解液从注液孔121向外渗漏。
在另一种可能实施的方式中，封口件14上具有与注液孔121相适配的挡塞，例如，注液孔121呈圆形孔，挡塞则为圆柱塞，挡塞可以伸入到注液孔121内将注液孔121堵住，封口件14阻挡在注液孔121的下端面，本示例中，通过挡塞阻挡在注液孔121内、以及通过封口件14的阻挡在注液孔121的下端面，防止电解液泄漏，实现密封效果。
封口件14可以是嵌在底壁12内，封口件14的下表面与底壁12的下表面平齐，避免封口件14的下端凸出占用电池的安装空间。
当从注液孔121向容置腔11内注入电解液完成后，可以将封口件14与注液孔121的结合处进行焊接，提高密封效果。
本实施例提供的一种电池，由于将注液孔121开设在了底壁12上，相对于现有技术中在顶盖32上开设注液孔121，可以简化顶盖32的加工工艺，节约电池的生产成本，也可以提高电池的美观性。
在一种可能实施的方式中，本实施例提供的一种电池为纽扣电池。
本申请还提供一种电子产品，包括上述的电池。电池通过导电件31的凸台部312与电子产品的正极连接导通，通过壳体10与电子产品的负极连接导 通，从而为电子产品供电。
本申请中的一种电子产品，包括但不限于是包括上述的电池的电脑主板、电子表、电子词典、电子秤、遥控器、电动玩具、心脏起搏器、电子助听器、计数器以及照相机等。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等应做广义理解，例如可以是固定连接，也可以是可拆卸连接，或成为一体；可以是机械连接，也可以是电连接或者可以互相通讯；可以是直接相连，也可以通过中间媒介间接相连，可以使两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
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 (11)

  1. 一种电池，其特征在于，包括：
    壳体(10)，所述壳体(10)包括底壁(12)和侧围壁(13)，所述侧围壁(13)的下端连接在所述底壁(12)的边缘，所述底壁(12)和所述侧围壁(13)围成容置腔(11)；
    盖板组件(30)，所述盖板组件(30)设置在所述壳体(10)上，所述盖板组件(30)包括：导电件(31)和顶盖(32)，所述顶盖(32)绝缘连接在所述导电件(31)上，所述导电件(31)包括平整部(311)和凸台部(312)，所述凸台部(312)连接在所述平整部(311)上，所述顶盖(32)的中心开设有通孔(321)，所述凸台部(312)延伸到所述通孔(321)内；
    电芯本体(20)，所述电芯本体(20)容纳在所述容置腔(11)内，所述电芯本体(20)连接有第一极耳(40)和第二极耳(50)，所述第一极耳(40)与所述导电件(31)连接，所述第二极耳(50)与所述壳体(10)连接。
  2. 根据权利要求1所述的电池，其特征在于，所述顶盖(32)背向所述导电件(31)的一面为第一面(323)，所述顶盖(32)面向所述导电件(31)的一面为第二面(324)，所述第二面(324)的边缘设置有台阶(322)，所述台阶(322)自所述第二面(324)向所述第一面(323)凹陷；所述侧围壁(13)的上端具有开口(131)，所述台阶(322)的顶壁抵在所述侧围壁(13)的上端。
  3. 根据权利要求2所述的电池，其特征在于，所述台阶(322)环绕所述第二面(324)的边缘一周；所述台阶(322)自所述第二面(324)向所述第一面(323)凹陷的深度H1的范围为0.05mm～0.15mm；和/或
    所述台阶(322)的内壁与所述第一面(323)的边缘之间的距离D的范围为0.1mm～0.2mm。
  4. 根据权利要求3所述的电池，其特征在于，所述顶盖(32)的厚度T的范围为0.1mm～0.2mm；和/或
    所述平整部(311)的直径小于所述顶盖(32)的第二面(324)的直径。
  5. 根据权利要求1-4任一所述的电池，其特征在于，所述通孔(321)的内径大于所述凸台部(312)的直径，且所述通孔(321)的内径小于所述 平整部(311)的直径。
  6. 根据权利要求2-4任一所述的电池，其特征在于，所述凸台部(312)的顶端与所述第一面(323)平齐；或所述凸台部(312)的顶端低于所述第一面(323)。
  7. 根据权利要求1-4任一所述的电池，其特征在于，所述第一极耳(40)与所述平整部(311)连接，所述第二极耳(50)与所述壳体(10)的底壁(12)连接。
  8. 根据权利要求1-4任一所述的电池，其特征在于，所述第一极耳(40)与所述平整部(311)通过激光焊接连接，激光焊接的焊点(60)位于所述平整部(311)的中心；
    所述第一极耳(40)靠近所述导电件(31)边缘的一端具有限位边(41)，所述限位边(41)与所述导电件(31)的边缘之间的距离H2小于所述限位边(41)与所述激光焊接的焊点(60)的中心的距离H3。
  9. 根据权利要求1-4任一所述的电池，其特征在于，所述底壁(12)上开设有与所述容置腔(11)连通的注液孔(121)，所述底壁(12)的下端还设置有封口件(14)，所述封口件(14)密封连接在所述注液孔(121)上。
  10. 根据权利要求1-4任一所述的电池，其特征在于，所述顶盖(32)为不锈钢顶盖；所述顶盖(32)上镀有镍层，所述镍层的厚度为0.5μm～5μm；和/或
    所述顶盖(32)通过绝缘件(33)绝缘连接在所述导电件(31)上。
  11. 一种电子产品，其特征在于，包括权利要求1-10任一项所述的电池。
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CN213716968U (zh) * 2020-11-18 2021-07-16 江门市元熙科技有限公司 一种盖板结构及其扣式电池
CN112993452A (zh) * 2021-04-13 2021-06-18 珠海冠宇电池股份有限公司 扣式电池及电子设备
CN215342693U (zh) * 2021-07-30 2021-12-28 珠海冠宇电池股份有限公司 一种电池及电子产品
CN215988886U (zh) * 2021-09-10 2022-03-08 珠海冠宇电池股份有限公司 电池
CN216120498U (zh) * 2021-09-10 2022-03-22 珠海冠宇电池股份有限公司 电池
CN215644579U (zh) * 2021-09-14 2022-01-25 珠海冠宇电池股份有限公司 一种电池

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CN116073043A (zh) * 2023-03-07 2023-05-05 星恒电源股份有限公司 正极盖板、电芯及组装方法
WO2024183213A1 (zh) * 2023-03-07 2024-09-12 星恒电源股份有限公司 正极盖板、电芯及组装方法

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