WO2023040865A1 - 电池及电子设备 - Google Patents

电池及电子设备 Download PDF

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Publication number
WO2023040865A1
WO2023040865A1 PCT/CN2022/118606 CN2022118606W WO2023040865A1 WO 2023040865 A1 WO2023040865 A1 WO 2023040865A1 CN 2022118606 W CN2022118606 W CN 2022118606W WO 2023040865 A1 WO2023040865 A1 WO 2023040865A1
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WO
WIPO (PCT)
Prior art keywords
conductive member
battery
battery according
pole piece
protrusion
Prior art date
Application number
PCT/CN2022/118606
Other languages
English (en)
French (fr)
Inventor
卫志达
彭宁
徐延铭
Original Assignee
珠海冠宇电池股份有限公司
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Filing date
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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
Publication of WO2023040865A1 publication Critical patent/WO2023040865A1/zh
Priority to US18/523,850 priority Critical patent/US20240097252A1/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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—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
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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
    • H01M50/19—Sealing members characterised by the material
    • H01M50/198—Sealing members characterised by the material characterised by physical properties, e.g. adhesiveness or hardness
    • 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
    • H01M50/543—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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/588—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries outside the batteries, e.g. incorrect connections of terminals or busbars
    • 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
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
    • H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
    • 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 disclosure relates to the technical field of batteries, in particular to a battery and electronic equipment.
  • the existing battery includes a lower case, a positive electrode conductive part, a negative electrode conductive part, an electrode assembly and a sealing part, wherein the electrode assembly is located in the lower case, the negative electrode conductive part is covered on the top of the lower case, and the middle part of the negative electrode conductive part is provided with a through hole. hole; the positive conductor is pasted on the outer surface of the negative conductor by insulating glue, and the middle part of the positive conductor communicates with the inside of the lower casing through the through hole on the negative conductor.
  • a liquid injection port is arranged on the positive electrode conductive part, and the sealing part is welded on the positive electrode conductive part to cover the liquid injection port.
  • embodiments of the present application provide a battery and an electronic device, the battery structure is relatively simple, and the manufacturing process is simplified.
  • the first aspect of the present application provides a battery, including an electrode assembly, a lower case, a first conductive member and a second conductive member, the top of the lower case has an opening, and the second conductive member is covered on the lower case
  • the opening of the opening, the second conductive part and the lower case surround a housing chamber, and the electrode assembly is located in the housing chamber; the first conductive part is connected to the side of the second conductive part facing the housing chamber, and the first conductive part and the second conductive part A sealing layer is provided between them to insulate the two, and a through hole is opened on the second conductive member, and at least part of the structure on the first conductive member is exposed to the outside of the accommodating cavity through the through hole.
  • the first conductive member includes a body and a protruding portion protruding from the surface of the body, a part of the body is connected to the surface of the second conductive member facing the accommodating cavity through a sealing layer, and the protruding portion It is located in the through hole of the second conductive member, and there is a distance between the side wall of the protruding part and the hole wall of the through hole.
  • the top surface of the protrusion is flush with the top surface of the second conductive member
  • the height of the top surface of the protrusion relative to the bottom of the battery is higher than the height of the top surface of the second conductive member relative to the bottom of the battery;
  • the height of the top surface of the protrusion relative to the bottom of the battery is lower than the height of the top surface of the second conductive member relative to the bottom of the battery.
  • the height difference between the top surface of the protruding part and the top surface of the second conductive member is in the range of -150 ⁇ m ⁇ 150 ⁇ m.
  • the sealing layer includes an isolation portion located between the through hole and the protrusion, and the isolation portion is clamped between a side wall of the protrusion and a hole wall of the through hole.
  • the top end surface of the isolation part is flush with the top end surface of the second conductive member
  • the height of the top surface of the separator relative to the bottom of the battery is higher than the height of the top surface of the second conductive member relative to the bottom of the battery;
  • the height of the top surface of the isolation part relative to the bottom of the battery is lower than the height of the top surface of the second conductive member relative to the bottom of the battery.
  • the height difference between the top surface of the isolation part and the top surface of the second conductive member is in the range of: -100 ⁇ m to 100 ⁇ m; and/or
  • the thickness of the isolation part ranges from 5 ⁇ m to 200 ⁇ m.
  • the sealing layer is insulating glue.
  • the protrusion is in the shape of a cone.
  • the cross-sectional diameter of the protruding part is in the range of 10 ⁇ m ⁇ 2000 ⁇ m.
  • the thickness range of both the protruding part and the body is: 2 ⁇ m ⁇ 300 ⁇ m.
  • the side surface of the protruding part is parallel to or has an included angle with the thickness direction of the first conductive member;
  • connection position between the protruding part and the body is provided with a rounded corner structure.
  • the lower case includes a bottom wall and a side wall surrounding an edge of the bottom wall, and a top of the side wall is connected to an edge portion of the second conductive member.
  • a position near the edge of the second conductive member has a positioning groove, the positioning groove is located on the surface of the second conductive member facing the electrode assembly, and the top of the side wall is connected to the positioning groove.
  • the groove depth of the positioning groove is: 0.05mm ⁇ 0.1mm.
  • the positioning groove extends to the edge side of the second conductive member, and a first chamfering structure is formed between the groove bottom and the groove wall of the positioning groove, and the angle range of the first chamfering structure is: 5° ⁇ 90°.
  • a second chamfering structure is provided at the connection position between the side wall and the bottom wall of the lower housing, and the chamfering range of the second chamfering structure is: 5°-90°.
  • the electrode assembly includes a first tab and a second tab, the first tab is electrically connected to the first conductive member, and the second tab is electrically connected to the second conductive member,
  • Positioning marks are provided on the edge of the outer contour of the first conductive member, and the positioning marks are used to indicate the welding position of the first tab on the first conductive member.
  • the two positioning marks are arranged symmetrically with respect to the center of the first conductive member.
  • the electrode assembly includes a first tab, a second tab, a first pole piece, a second pole piece, and a diaphragm,
  • the first pole piece, the diaphragm, and the second pole piece are laminated and wound together in sequence, the first pole piece is electrically connected to the first pole piece, the second pole piece is electrically connected to the second pole piece,
  • Both the winding head end and the winding tail end of the first pole piece have an empty foil area, and the winding head end and the winding tail end of the second pole piece both have an empty foil area,
  • the first tab is electrically connected to the empty foil area at the winding end of the first pole piece
  • the second tab is electrically connected to the empty foil area at the winding end of the second pole piece.
  • the second aspect of the present application provides an electronic device, including: an electronic device body and the above-mentioned battery, and the battery provides electric energy for the electronic device body.
  • the first conductive member is connected to the side of the second conductive member facing the accommodating cavity, that is, the first conductive member is connected to the inner surface of the second conductive member, and at the same time, the first conductive member and the second conductive member are connected through the sealing layer.
  • the first conductive part moves upwards under the internal pressure, wherein the sealing layer between the first conductive part and the second conductive part can play a role in buffering the pressure; at the same time, The part of the first conductive part corresponding to the second conductive part will be blocked by the second conductive part during the rising process, and the second conductive part as a whole offsets part of the pressure on the first conductive part and shares the pressure on the first conductive part , so as to avoid problems such as the opening of the top cover of the battery during use, and improve the internal pressure resistance of the battery.
  • FIG. 1 is a schematic diagram of the overall structure of a battery provided in an embodiment of the present application
  • FIG. 2 is a top view of a battery provided in an embodiment of the present application.
  • Fig. 3 is a sectional view along the A-A line of Fig. 2;
  • Fig. 4 is a partial enlarged view of place B in Fig. 3;
  • FIG. 5 is a schematic structural diagram of the first conductive member in the battery provided by the embodiment of the present application.
  • the existing battery includes a lower casing, a positive electrode conductive part, a negative electrode conductive part, an electrode assembly and a sealing part, the number of parts is large, the structure is complex and difficult to manufacture.
  • the battery is a button battery as an example for description.
  • Button battery refers to the battery with the shape and size of a button. Generally, its diameter is larger and its thickness is thinner. Therefore, button batteries are classified from the appearance.
  • the present application is not limited thereto, and other types of batteries may also be used.
  • the batteries are other types of batteries, the principle of resisting pressure is similar to this, and will not be repeated here.
  • Figure 1 is a schematic diagram of the overall structure of a battery provided in the embodiment of the present application
  • Figure 2 is a top view of a battery provided in the embodiment of the present application
  • Figure 3 is a cross-sectional view along the line A-A in Figure 2
  • Figure 4 is a schematic view of the battery in Figure 3 Partial enlarged view at B.
  • the battery 100 of the embodiment of the present application includes an electrode assembly 10, a lower case 20, a first conductive member 30 and a second conductive member 50, and the top of the lower case 20 has an opening 21.
  • the second conductive member 50 is covered on the opening of the lower case 20, the second conductive member 50 and the lower case 20 enclose the accommodation chamber 40, and the electrode assembly 10 is located in the accommodation chamber 40;
  • the first conductive member 30 is connected to the side of the second conductive member 50 facing the accommodating cavity 40, and a sealing layer 60 is provided between the first conductive member 30 and the second conductive member 50 to insulate the two, and the second conductive member 50 A through hole 51 is opened on it, and at least part of the structure on the first conductive member 30 is exposed to the outside of the accommodation cavity 40 through the through hole 51 .
  • the first conductive member 30 by setting the first conductive member 30 to be connected to the side of the second conductive member 50 facing the accommodating cavity 40, that is, the first conductive member 30 is connected to the inner surface of the second conductive member 50, and at the same time, the first The conductive part and the second conductive part are connected through the sealing layer.
  • the first conductive part 30 moves upwards under the internal pressure, wherein the first conductive part and the second conductive part
  • the sealing layer between them can play the role of buffering pressure; at the same time, the part of the first conductive member 30 corresponding to the second conductive member 50 will be blocked by the second conductive member 50 during the rising process, and the second conductive member 50 as a whole cancels the second conductive member 50.
  • Part of the pressure on one conductive member shares the pressure on the first conductive member 30 , thereby avoiding problems such as top cover opening of the battery during use, and improving the internal pressure resistance of the battery.
  • the electrolyte is injected into the lower housing 20 through the gap between the top of the lower housing 20 and the second conductive member. , is easy to manufacture, and compared with the prior art, the structure of the sealing member is also omitted, so there is no problem that the internal pressure of the battery 100 is applied to the sealing member, causing the sealing member to be easily lifted.
  • the first conductive member 30 is an anode conductive member and the second conductive member 50 is a negative electrode conductive member as an example for illustration, but this application is not limited thereto, and the first conductive member 30 may also be The negative conductive part, the second conductive part 50 is the positive conductive part.
  • the electrode assembly 10 may include a winding core 15, a first tab 11 and a second tab 12, and the winding core 15 includes a first pole piece 13, a second pole piece 14, And isolation film 16 etc.
  • the winding core 15 can be a cylindrical winding body and is arranged in the accommodation cavity 40, and the electrolyte solution is also contained in the accommodation cavity 40 at the same time, the first pole piece 13 and the second pole piece 14 are separated by the separator 16 and coiled together.
  • the first pole piece 13 is electrically connected to the first pole lug 11, and the second pole piece 14 is electrically connected to the second pole lug 12.
  • the first pole lug 11 and the second pole lug 12 can be respectively connected to Both ends of the winding core 15 are drawn out.
  • both the winding head end and the winding tail end of the first pole piece 13 have an empty foil area
  • the winding head end and the winding tail end of the second pole piece 14 both have an empty foil area
  • the first tab 11 It is electrically connected to the empty foil area at the winding tail end of the first pole piece 13
  • the second tab 12 is electrically connected to the empty foil area at the winding tail end of the second pole piece 14 .
  • connection position of the first tab 11 on the first pole piece 13 can also be other positions, and the second pole tab 12 is on the second pole piece 14.
  • the connection position of can also be other positions.
  • the winding head end of the first pole piece does not have an empty foil area, and the winding head end of the second pole piece does not have an empty foil area.
  • the second tab 12 is connected to the lower casing 20, and the lower casing 20 is electrically connected to the second conductive member 50, so the second tab 12 is electrically connected to the second conductive member 50, and the first conductive member 30 is electrically connected to the second conductive member 50. It is electrically connected with the first tab 11 directly.
  • the lower casing 20 may be a metal casing, and the cross-sectional shape of the lower casing 20 is not limited to a circle, but may also be an ellipse, a polygon, and the like.
  • the lower case 20 includes a bottom wall 22 and a side wall 23 surrounding the edge of the bottom wall 22, so that the lower case 20 forms a cover.
  • the lower case 20 and the second Before the conductive member 50 is connected and fixed, the gap between the top of the lower case 20 and the second conductive member 50 is used as the liquid injection port, that is, the electrolyte is injected into the accommodating chamber 40 through the gap between the top of the lower case 20 and the second conductive member 50 .
  • a second chamfering structure may be provided at the junction of the side wall 23 and the bottom wall 22 of the lower case, and the angle range of the second chamfering structure may be 5°-90°.
  • the second conductive member 50 can be covered on the opening 21 of the lower case 20, the second conductive member 50 and the lower case 20 can enclose the housing cavity 40, and the above-mentioned electrode assembly 10 can be arranged in the housing cavity 40.
  • the top end portion of the side wall 23 may be connected to the edge portion of the second conductive member 50 .
  • the edge portion of the second conductive member 50 may be connected to the top end portion of the side wall 23 by laser welding. In this way, the second conductive member 50 is actually connected to the opening 21 of the lower case 20 .
  • a chamfer may also be provided at the connection between the second conductive member 50 and the lower case 20 , and the angle of the chamfer may be 5° ⁇ 90°.
  • the edge of the second conductive member 50 is thinned, for example, referring to FIG.
  • a positioning groove 52 is formed at the position, the positioning groove 52 is located on the surface of the second conductive member 50 facing the electrode assembly, the top of the side wall 23 can be connected in the positioning groove 52, the positioning groove 52 and the top of the side wall 23
  • the positioning groove 52 is formed as an annular structure.
  • the depth of the positioning groove 52 may be 0.05 mm ⁇ 0.1 mm.
  • the positioning groove 52 extends to the edge side of the second conductive member 50, a first chamfer structure is formed between the groove bottom and the groove wall of the positioning groove 52, and the angle range of the first chamfer structure For: 5 ° ⁇ 90 °.
  • the second conductive member 50 is provided with a through hole 51, and the first conductive member 30 is connected to the side of the second conductive member 50 facing the accommodating cavity 40. It should be noted that the first conductive member 30 and the second A sealing layer 60 is provided between the conductive members 50 to insulate them, so as to prevent the electrolyte from leaking out of the battery 100 .
  • the sealing layer 60 may be insulating glue, and the thickness of the sealing layer 60 may be 5 ⁇ m ⁇ 200 ⁇ m.
  • the lower casing 20 and the second conductive member 50 are the second pole of the battery 100 , such as the negative pole; A first pole, such as a positive pole. Because part of the structure of the first conductive member 30 is exposed to the outside of the battery 100 through the through hole 51 , both the first pole and the second pole of the battery 100 can be arranged on the top side of the battery 100 .
  • a protruding structure may be provided on the top of the first conductive member 30 .
  • the first conductive member 30 includes a body 31 and a protruding portion 32 protruding from the surface of the body 31 , and a part of the body 31 is connected to the direction of the second conductive member 50 through a sealing layer 60
  • the protruding portion 32 is located in the through hole 51 of the second conductive member 50 , so that the protruding portion 32 can be exposed outside the battery 100 through the through hole 51 .
  • the sealing layer 60 includes a sealing layer main body 55 and an isolation portion 54 located between the through hole and the protruding portion 32 , and the sealing layer main body 55 is clamped between the first conductive member 30 and the second conductive member 50 Specifically, the main body portion 55 of the sealing layer is located between the radial surfaces of the first conductive member 30 and the second conductive member 50 .
  • the partition 54 is sandwiched between the side wall 23 of the protrusion 32 and the hole wall of the through hole. In the case where both the sealing layer main body 55 and the isolation part 54 are insulating glue, the sealing layer main body 55 and the isolation part 54 can be integrally formed.
  • the portion of the insulating glue between the radial surfaces of the first conductive member 30 and the second conductive member 50 forms a sealing layer body portion 55
  • Excess insulating glue can overflow towards the gap between the protruding portion 32 and the through hole 51 , that is to form the isolation portion 54 .
  • the sealing layer main body portion 55 and the isolation portion 54 may be insulating glue with the same composition.
  • the isolation portion and the main body portion 55 of the sealing layer may be insulating glues with different compositions.
  • the isolation part between the protrusion 32 and the hole wall of the through hole by setting the isolation part between the protrusion 32 and the hole wall of the through hole, the glue coating area of the first conductive part 30 and the second conductive part 50 is increased, and the first conductive part 30 and the second conductive part are improved.
  • the stability of the conductive member 50 at the same time, enables the isolation part 54 to effectively buffer the internal pressure in the width direction of the battery, prevent the first conductive member 30 from moving left and right, and prevent the protruding part and the through hole from contacting each other to cause a short circuit .
  • the top surface of the isolation part 54 is flush with the top surface of the second conductive member 50;
  • the installation height of the bottom of the battery 100 ; or, the installation height of the top surface of the isolation part 54 relative to the bottom of the battery 100 is lower than the installation height of the top surface of the second conductive member 50 relative to the bottom of the battery 100 .
  • the height difference between the top end surface of the isolation portion 54 and the top end surface of the second conductive member 50 may range from -100 ⁇ m to 100 ⁇ m.
  • the thickness of the isolation portion 54 may be 5 ⁇ m to 200 ⁇ m.
  • the top end surface of the protrusion 32 is flush with the top end surface of the second conductive member 50;
  • the height of the top surface of a conductive member 30 relative to the bottom of the battery 100 may be lower than the height of the top surface of the first conductive member 30 relative to the bottom of the battery 100 .
  • the height difference between the top surface of the protruding portion 32 and the top surfaces of the two conductive elements is in the range of ⁇ 150 ⁇ m ⁇ 150 ⁇ m.
  • the protruding portion 32 can be a rotundum such as a truncated cone, and the shape of the body 31 can also be a truncated cone.
  • the cross-sectional diameter of the protruding portion 32 ranges from 10 ⁇ m to 2000 ⁇ m.
  • a chamfer can be provided, and the outer wall 23 of the protruding part 32 can be parallel to the thickness direction of the battery 100 (thickness direction of the first conductive member), or can be parallel to the thickness direction of the first conductive member.
  • the thickness direction of the battery 100 has an included angle, that is, it is inclined relative to the thickness direction of the battery 100 .
  • the connection position between the protruding portion 32 and the body 31 is provided with a rounded corner structure.
  • the thickness of both the protruding part 32 and the main body may be 2 ⁇ m ⁇ 300 ⁇ m.
  • FIG. 5 is a schematic structural diagram of the first conductive member in the battery provided by the embodiment of the present application.
  • a positioning mark 70 is provided on the edge of the outer contour of the first conductive member 30 , and the positioning mark 70 is used to indicate the welding position of the first tab on the first conductive member 30 .
  • the positioning mark 70 can be at least one notch, and the shape of the notch can be selected according to actual needs, for example, it can be a polygon, a circle, and the like.
  • the number of positioning marks 70 is two, and the two positioning marks 70 are arranged symmetrically with respect to the center of the first conductive member 30 .
  • the winding core 15 includes the first pole piece 13 and the second pole piece 14 .
  • the first pole piece 13 includes a first current collector and a first active material disposed on the opposite surface of the first current collector
  • the second pole piece 14 comprises a second current collector and a first active material disposed on the opposite surface of the second current collector.
  • the first active material is used as an active material capable of intercalating and deintercalating lithium.
  • lithium-containing compounds such as lithium oxide, lithium phosphorus oxide, lithium sulfide, or an interlayer compound containing lithium can be selected, and lithium can be exemplified. metal composite oxides.
  • Metal elements constituting the lithium metal composite oxide are, for example, selected from Mg, Al, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, Y, Zr, Sn, Sb , W, Pb and Bi at least one. Among them, at least one selected from Co, Ni, Mn and Al can be selected.
  • suitable lithium metal composite oxides include lithium metal composite oxides containing Co, Ni, and Mn, and lithium metal composite oxides containing Co, Ni, and Al.
  • the second active material is a material capable of storing and releasing lithium ions.
  • Examples thereof include carbon materials, lithium metal, metals capable of forming an alloy with lithium, or alloy compounds containing the metals.
  • carbon material graphites such as natural graphite, non-graphitizable carbon, and artificial graphite, and cokes can be used.
  • alloy compound at least one metal that can form an alloy with lithium can be used.
  • silicon and tin are preferable, and silicon oxide, tin oxide, and the like bonded to oxygen can also be used.
  • a mixture of the above-mentioned carbon material and a compound of silicon or tin can be used.
  • one having a higher charging and discharging potential with respect to metal lithium such as lithium titanate than carbon materials and the like may be used.
  • the nonaqueous electrolyte contains a nonaqueous solvent and an electrolyte salt dissolved in the nonaqueous solvent.
  • the nonaqueous electrolyte is not limited to a liquid electrolyte (nonaqueous electrolytic solution), and may be a solid electrolyte using a gel polymer or the like.
  • the electrolyte solution can be a mixed organic solvent selected from at least one of the following: propylene carbonate (PC), ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), carbonic acid Dipropyl ester (DPC), dimethyl sulfoxide, acetonitrile, dimethoxyethane, diethoxyethane, tetrahydrofuran, N-methyl-2-pyrrolidone (NMP), ethyl methyl carbonate (EMC) , ⁇ -butyrolactone (GBL), fluoroethylene carbonate (FEC), methyl formate, ethyl formate, propyl formate, methyl acetate, ethyl acetate, propyl acetate, amyl acetate, propionic acid Methyl propionate, ethyl propionate and butyl propionate.
  • PC propylene carbonate
  • EC ethylene carbonate
  • DEC
  • the electrolyte solution according to the present invention may also contain a lithium salt, and the anion of the lithium salt may be at least one selected from the following: F-, Cl-, Br-, I-, NO 3 -, N( CN) 2 -, BF 4 -, ClO 4 -, PF 6 -, (CF 3 ) 2 PF 4 -, (CF 3 ) 3 PF 3 -, (CF 3 ) 4 PF 2 -, (CF 3 ) 5 PF -, (CF 3 ) 6 P-, F 3 SO 3 -, CF 3 CF 2 SO 3 -, (CF 3 SO 2 ) 2 N-, (FSO 2 ) 2 N-, CF 3 CF 2 (CF 3 ) 2 CO-, (CF 3 SO 2 ) 2 CH-, (SF 5 ) 3 C-, (CF 3 SO 2 ) 3 C-, CF 3 (CF 2 ) 7 SO 3 -, CF 3 CO 2 -, CH 3 CO 2 -, S
  • Step 1 First, bend the first tab 11, and connect one end of the first tab 11 to the corresponding pole piece of the winding core 15. It should be noted that after the first tab 11 is bent, the other end should be kept in line with the coil.
  • the end faces of the core 15 are parallel;
  • Step 2 Place the winding core 15 connected with the first tab 11 and the second tab 12 inside the housing cavity 40 , and weld the second tab 12 and the lower casing 20 by laser welding or resistance welding.
  • the first tab 11 is welded to the first conductive member 30 by laser welding or resistance welding.
  • Step 3 Coating insulating glue between the second conductive member 50 and the first conductive member 30, bonding them together, and then putting them into an oven for baking.
  • Step 4 Place the adhesively fixed first conductive member 30 and the second conductive member 50 on the lower case, and inject the electrolyte into the lower case 20 through the gap between the second conductive member 50 and the lower case. And the second conductive member 50 is welded on the lower casing 20 by laser welding or resistance welding to complete the assembly of the battery 100 .
  • Step 5 Carry out an electrical performance test on the above-mentioned battery 100 .
  • the first conductive member 30 and the second conductive member 50 are first bonded and fixed by insulating glue, and then placed on the lower case 20 correspondingly, and the second conductive member 50 and the lower
  • the gap between the housings 20 is used as a liquid injection port, and the electrolyte is injected into the lower housing 20 through the gap between the second conductive member 50 and the lower housing 20, and then the second conductive member 50 and the lower housing 20 are connected. Welding fixed.
  • the present invention also provides an electronic device, including: an electronic device body and the above-mentioned battery 100, and the battery 100 provides electric energy for the electronic device body.
  • the structure of the battery in the electronic device provided by the present invention is the same as that of the above-mentioned battery, and can bring about the same or similar technical effects, which will not be repeated here.
  • connection should be understood in a broad sense, for example, it can be fixedly connected, or through an intermediate
  • the media is indirectly connected, which can be the internal communication of two elements or the interaction relationship between two elements.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
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  • Connection Of Batteries Or Terminals (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

本发明提供一种电池及电子设备，电池包括电极组件、下壳体、第一导电件以及第二导电件，下壳体顶部具有开口，第二导电件盖设于下壳体的开口，第二导电件和下壳体围成容纳腔，电极组件位于容纳腔内；第一导电件连接于第二导电件的朝向容纳腔的一侧，第一导电件和第二导电件之间设有使二者绝缘的密封层，第二导电件上开设有贯穿孔，第一导电件上至少部分结构通过贯穿孔暴露至所述容纳腔外。本发明的电池结构简单且易于制作。

Description

电池及电子设备
本申请要求于2021年9月18日提交中国专利局、申请号为202111112950.X、申请名称为“电池及电子设备”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
本公开涉及电池技术领域，尤其涉及一种电池及电子设备。
背景技术
随着经济的发展和科技的进步，智能产品越来越向轻便化、小型化的方向发展，可重复循环充电使用的电池也逐步应用到了人们日常生活的各个领域。
现有的电池包括下壳体、正极导电件、负极导电件、电极组件和封口件，其中，电极组件位于下壳体内，负极导电件盖设在下壳体的顶端，负极导电件中部设有通孔；正极导电件通过绝缘胶粘贴在负极导电件的外侧面上，并且正极导电件的中部通过负极导电件上的通孔与下壳体内部连通。正极导电件上设有注液口，封口件就焊接在正极导电件上，以封盖注液口。
然而，上述现有的电池结构较为复杂，制作工序较多。
申请内容
鉴于上述问题，本申请实施例提供一种电池及电子设备，电池结构较为简单，制作工序得到简化。
为了实现上述目的，本申请第一方面提供一种电池，包括电极组件、下壳体、第一导电件以及第二导电件，下壳体顶部具有开口，第二导电件盖设于下壳体的开口，第二导电件和下壳体围成容纳腔，电极组件位于容纳腔内；第一导电件连接于第二导电件的朝向容纳腔的一侧，第一导电件和第二导电件之间设有使二者绝缘的密封层，第二导电件上开设有贯穿孔，第一导电件上至少部分结构通过贯穿孔暴露至容纳腔外。
在一种可能的实施方式中，第一导电件包括本体和凸出于本体表面的凸出部，本体的部分区域通过密封层连接在第二导电件的朝向容纳腔的表面上，凸出部位于第二导电件的贯穿孔中，且凸出部的侧壁与贯穿孔的孔壁之间具有间距。
在一种可能的实施方式中，凸出部的顶端面与第二导电件的顶端面齐平；或者
凸出部的顶端面相对于电池底部的设置高度高于第二导电件的顶端面相对于电池底部的设置高度；或者
凸出部的顶端面相对于电池底部的设置高度低于第二导电件的顶端面相对于电池底部的设置高度。
在一种可能的实施方式中，凸出部的顶端面与第二导电件的顶端面的高度差范围为：-150μm～150μm。
在一种可能的实施方式中，密封层包括位于贯穿孔和凸出部之间的隔离部，隔离部被夹持在凸出部的侧壁和贯穿孔的孔壁之间。
在一种可能的实施方式中，隔离部的顶端面与第二导电件的顶端面之间齐平；或者
隔离部的顶端面相对于电池底部的设置高度高于第二导电件的顶端面相对于电池底部的设置高度；或者
隔离部的顶端面相对于电池底部的设置高度低于第二导电件的顶端面相对于电池底部的设置高度。
在一种可能的实施方式中，隔离部的顶端面与第二导电件的顶端面的高度差范围为：-100μm～100μm；和/或
隔离部的厚度范围为：5μm～200μm。
在一种可能的实施方式中，密封层为绝缘胶。
在一种可能的实施方式中，凸出部为圆台状。
在一种可能的实施方式中，凸出部的横截面直径范围为：10μm～2000μm。
在一种可能的实施方式中，凸出部和本体的厚度范围均为：2μm～300μm。
在一种可能的实施方式中，凸出部的侧面与第一导电件的厚度方向平行或者具有夹角；或者
凸出部与本体的连接位置设有倒圆角结构。
在一种可能的实施方式中，下壳体包括底壁和围绕底壁边缘的侧壁，侧 壁的顶部和第二导电件的边缘部分连接。
在一种可能的实施方式中，第二导电件的靠边缘位置具有定位凹槽，定位凹槽位于第二导电件的朝向电极组件的表面上，侧壁的顶端与定位凹槽连接。
在一种可能的实施方式中，定位凹槽的槽深为：0.05mm～0.1mm。
在一种可能的实施方式中，定位凹槽延伸至第二导电件的边缘侧面，定位凹槽的槽底和槽壁之间形成第一倒角结构，第一倒角结构的角度范围为：5°～90°。
在一种可能的实施方式中，下壳体的侧壁和底壁的连接位置处设置第二倒角结构，第二倒角结构的倒角范围为：5°～90°。
在一种可能的实施方式中，电极组件包括第一极耳和第二极耳，第一极耳和第一导电件电连接，第二极耳和第二导电件电连接，
第一导电件的外轮廓边缘位置设有定位标记，定位标记用于指示第一极耳在第一导电件上的焊接位置。
在一种可能的实施方式中，定位标记的数量为两个，且两个定位标记相对于第一导电件的中心对称设置。
在一种可能的实施方式中，电极组件包括第一极耳、第二极耳、以及第一极片、第二极片和隔膜，
第一极片、隔膜、第二极片依次层叠并卷绕在一起，第一极耳电连接在第一极片上，第二极耳电连接在第二极片上，
第一极片的卷绕首端和卷绕尾端均具有空箔区，第二极片的卷绕首端和卷绕尾端均具有空箔区，
第一极耳电连接在第一极片的卷绕尾端的空箔区，第二极耳电连接在第二极片的卷绕尾端的空箔区。
本申请第二方面提供一种电子设备，包括：电子设备本体和上述的电池，电池为电子设备本体提供电能。
本申请的电池和电子设备，通过设置第一导电件连接于第二导电件的朝向容纳腔的一侧，即第一导电件连接于第二导电件的内侧表面上，同时，第一导电件和第二导电件通过密封层连接。在电池使用过程中，若遇到内部压力较大，第一导电件受到内部压力向上移动，其中，第一导电件和第二导电件之间的密封层可起到缓冲压力的作用；同时，第一导电件的与第 二导电件对应的部分在上升过程中会被第二导电件遮挡，第二导电件整体抵消第一导电件所受到的一部分压力，分担了第一导电件受到的压力，从而避免电池在使用过程中出现顶盖顶开等问题，提高电池的抗内部压强性。
本发明的构造以及它的其他发明目的及有益效果将会通过结合附图而对优选实施例的描述而更加明显易懂。
附图说明
图1为本申请实施例提供的一种电池的整体结构示意图；
图2为本申请实施例提供的一种电池的俯视图；
图3为沿图2的A-A线的剖视图；
图4为图3的B处的局部放大图；
图5为本申请实施例提供的电池中第一导电件的结构示意图。
附图标记说明：
100-电池；10-电极组件；11-第一极耳；12-第二极耳；13-第一极片；14-第二极片；15-卷芯；16-隔离膜；20-下壳体；21-开口；22-底壁；23-侧壁；30-第一导电件；31-本体；32-凸出部；40-容纳腔；50-第二导电件；51-贯穿孔；52-定位凹槽；54-隔离部；55-密封层主体部；60-密封层；70-定位标记。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
现有的电池包括下壳体、正极导电件、负极导电件、电极组件和封口件，零部件数量较多，结构复杂且不易制作。
下面结合附图说明本申请实施例的电池及电子设备。需要说明的是，本申请以电池为扣式电池为例进行说明。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。
但本申请不限于此，也可以是其它类型的电池，当电池为其它类型的电池时，其抗压的原理与此类似，此处不再赘述。
图1为本申请实施例提供的一种电池的整体结构示意图，图2为本申请实施例提供的一种电池的俯视图，图3为沿图2的A-A线的剖视图，图4为图3的B处的局部放大图。
参照图1、图2、图3、图4，本申请实施例的电池100，包括电极组件10、下壳体20、第一导电件30以及第二导电件50，下壳体20顶部具有开口21，第二导电件50盖设在下壳体20的开口上，第二导电件50和下壳体20围成容纳腔40，电极组件10位于容纳腔40内；
第一导电件30连接于第二导电件50的朝向容纳腔40的一侧，第一导电件30和第二导电件50之间设有使二者绝缘的密封层60，第二导电件50上开设有贯穿孔51，第一导电件30上至少部分结构通过贯穿孔51暴露至容纳腔40外。
在上述方案中，通过设置第一导电件30连接于第二导电件50的朝向容纳腔40的一侧，即第一导电件30连接于第二导电件50的内侧表面上，同时，第一导电件和第二导电件通过密封层连接，在电池100使用过程中，若遇到内部压力较大，第一导电件30受到内部压力向上移动，其中，第一导电件和第二导电件之间的密封层可起到缓冲压力的作用；同时，第一导电件30的与第二导电件50对应的部分在上升过程中会被第二导电件50遮挡，第二导电件50整体抵消第一导电件所受到的一部分压力，分担了第一导电件30受到的压力，从而避免电池在使用过程中出现顶盖顶开等问题，提高电池的抗内部压强性。
另外，电解液通过下壳体20顶部与第二导电件的缝隙注入下壳体20内，一方面，无需在第一导电件30或者第二导电件50上再设置注液口，不仅结构简单，易于制作，与现有技术相比，也省略了封口件的结构，因此也不存在电池100内部压力施加在封口件上，导致封口件易于被顶起的问题。
需要说明的是，本申请中，以第一导电件30为正极导电件，第二导电件50为负极导电件为例进行说明，但本申请不限于此，也可以是第一导电件30为负极导电件，第二导电件50为正极导电件。
在本申请的一个实施例中，参照图3，电极组件10可以包括卷芯15、第 一极耳11和第二极耳12，卷芯15包括第一极片13、第二极片14、以及隔离膜16等。具体的，卷芯15可以为圆柱形卷绕体且设于容纳腔40内，容纳腔40内也同时容纳有电解液，第一极片13与第二极片14由隔离膜16隔开并卷绕在一起。
在该实施例中，第一极片13上电连接有第一极耳11，第二极片14上电连接有第二极耳12，第一极耳11和第二极耳12可以分别在卷芯15的两端侧引出。具体的，第一极片13的卷绕首端和卷绕尾端均具有空箔区，第二极片14的卷绕首端和卷绕尾端均具有空箔区，第一极耳11电连接在第一极片13的卷绕尾端的空箔区上，第二极耳12电连接在第二极片14的卷绕尾端的空箔区上。
当然，本申请不限于此，在本申请的一些实施例中，第一极耳11在第一极片13上的连接位置也可以是其它位置，第二极耳12在第二极片14上的连接位置也可以为其它位置。在又一些具体的实施例中，第一极片的卷绕头端不具有空箔区，第二极片的卷绕头端不具有空箔区。
另外，第二极耳12连接在下壳体20上，而下壳体20又与第二导电件50电连接，因此第二极耳12与第二导电件50电连接，而第一导电件30与直接与第一极耳11电连接。
本申请实施例中，下壳体20可以为金属壳体，下壳体20的截面形状不限于圆形，还可以为椭圆形、多边形等。
示例性的，参照图3，下壳体20包括底壁22和围绕底壁22边缘的侧壁23，使得下壳体20形成罩状件，本申请实施例中，在下壳体20与第二导电件50连接固定之前，将下壳体20顶部与第二导电件50的缝隙作为注液口，即电解液通过该下壳体20顶部与第二导电件50的缝隙注入到容纳腔40内。
另外，下壳体的侧壁23和底壁22的连接处还可以设有第二倒角结构，第二倒角结构的角度范围可以是5°～90°。
参照图3、图4，第二导电件50可以盖设在下壳体20的开口21上，第二导电件50和下壳体20可以围成容纳腔40，上述的电极组件10可以设置在容纳腔40中。侧壁23的顶端部可以和第二导电件50的边缘部分连接。例如，第二导电件50的边缘部分可以通过激光焊接而连接在侧壁23的顶端部。这样，实际上第二导电件50连接在下壳体20的开口21上。另外，第二导电件50与下壳体20的连接处也可以设置倒角，倒角的角度可以为5°～90°。
当然，为了便于第二导电件50和侧壁23焊接，在一个具体实施例中，通过对第二导电件50的边缘做减薄设计，例如，参照图4，在第二导电件50靠边缘位置处形成定位凹槽52，定位凹槽52位于第二导电件50的朝向电极组件的表面上，侧壁23的顶端可以连接在定位凹槽52中，定位凹槽52与侧壁23的顶端部对应，因而定位凹槽52形成为环状结构。示例性的，定位凹槽52的深度可以是0.05mm～0.1mm。
作为一种可能的实施方式，定位凹槽52延伸至第二导电件50的边缘侧面，定位凹槽52的槽底和槽壁之间形成第一倒角结构，第一倒角结构的角度范围为：5°～90°。
本申请实施中，第二导电件50上设有贯穿孔51，第一导电件30连接于第二导电件50朝向容纳腔40的一侧，需要注意的是，第一导电件30和第二导电件50之间设有使二者绝缘的密封层60，可以防止电解液从该处漏出电池100外。这里，密封层60可以是绝缘胶，密封层60的厚度可以为5μm～200μm。
这样第一导电件30的至少部分结构通过贯穿孔51露出至容纳腔40外部。参照图1，从电池100整个外部来看，下壳体20和第二导电件50为电池100的第二极，例如负极；第一导电件30露出至贯穿孔51外的部分形成电池100的第一极，例如正极。正由于第一导电件30的部分结构通过贯穿孔51露出至电池100外部，因此电池100的第一极和第二极都可以布局在电池100的顶侧。
本申请实施例中，为了便于第一导电件30与外部零部件，例如导电片等的连接，可以在第一导电件30的顶部设置凸出结构。
示例性的，参照图3、图4，第一导电件30包括本体31和凸出于本体31表面的凸出部32，本体31的部分区域通过密封层60连接在第二导电件50的朝向容纳腔40的表面上，凸出部32位于第二导电件50的贯穿孔51中，这样可以使凸出部32通过贯穿孔51露出电池100外部。这里，需要注意的是，凸出部32的侧壁23与贯穿孔51的孔壁之间可以具有间距。以避免凸出部32和贯穿孔51相互接触，发生短路。
当然，密封层60包括密封层主体部55，以及位于贯通孔和凸出部32之间的隔离部54，密封层主体部55被夹持在第一导电件30和第二导电件50之间，具体的，密封层主体部55位于第一导电件30和第二导电件50的沿径向的表面之间。隔离部54被夹持在凸出部32的侧壁23和贯通孔的孔壁之间。 在密封层主体部55和隔离部54均为绝缘胶的情况下，密封层主体部55和隔离部54可以一体形成。例如，在第一导电件30和第二导电件50设置绝缘胶时，绝缘胶在第一导电件30和第二导电件50的沿径向的表面之间的部分形成密封层主体部55，多余的绝缘胶可以朝着凸出部32和贯穿孔51之间的间隙溢出，即形成隔离部54。即，密封层主体部55和隔离部54可以为相同成分的绝缘胶。
在另一个具体的实施例中，隔离部和密封层主体部55可为不同成分的绝缘胶。
上述方案中，通过设置位于凸出部32和贯通孔的孔壁之间的隔离部，从而提高第一导电件30和第二导电件50的涂胶面积，提高第一导电件30和第二导电件50的稳定性，同时，使得在电池的宽度方向上，隔离部54可有效缓冲内部压力，避免第一导电件30左右移动，防止凸出部和贯通孔之间相互接触发生短路的情况.
可选的，隔离部54的顶端面与第二导电件50的顶端面之间齐平；或者隔离部54的顶端面相对于电池100底部的设置高度高于第二导电件50的顶端面相对于电池100底部的设置高度；或者，隔离部54的顶端面相对于电池100底部的设置高度低于第二导电件50的顶端面相对于电池100底部的设置高度。例如，隔离部54的顶端面与第二导电件50顶端面的高度差范围可以是-100μm～100μm。另外，隔离部54的厚度可以为5μm～200μm。
本申请实施例中，参照图4，凸出部32的顶端面与第二导电件50的顶端面齐平；或者也可以是凸出部32的顶端面相对于电池100底部的设置高度高于第一导电件30的顶端面相对于电池100底部的设置高度。或者，也可以是凸出部32的顶端面相对于电池100底部的设置高度低于第一导电件30的顶端面相对于电池100底部的设置高度。
示例性的，凸出部32的顶端面与二导电件的顶端面的高度差范围为：-150μm～150μm。
另外，凸出部32可以为圆台状等回转体，本体31的形状也可以是圆台状等，本申请不限于此，凸出部32的形状还可以设置为其它。凸出部32为圆台时，凸出部32的横截面直径范围为：10μm～2000μm。另外，凸出部32和本体31之间的连接位置处，可以设置倒角，凸出部32的外侧壁23可以平行于电池100的厚度方向(第一导电件的厚度方向)，也可以与电池100的 厚度方向具有夹角，即相对于电池100的厚度方向倾斜。或者凸出部32与本体31的连接位置设有倒圆角结构。
其中，凸出部32和本体的厚度均可以为2μm～300μm。
图5为本申请实施例提供的电池中第一导电件的结构示意图。
参照图5，第一导电件30的外轮廓边缘位置设有定位标记70，定位标记70用于指示第一极耳在第一导电件30上的焊接位置。定位标记70可以是至少一个缺口，缺口的形状可以根据实际需要选择，例如可以是多边形，圆形等。
作为一种可能的实施方式，定位标记70的数量为两个，且两个定位标记70相对于第一导电件30的中心对称设置。
本申请实施例中，如前所述，卷芯15包括第一极片13和第二极片14。其中，第一极片13包括第一集流体以及设置在第一集流体相对表面上的第一活性材料，第二极片14包括第二集流体以及设置在第二集流体相对表面上的第二活性材料。
示例性的，第一活性材料作为能够嵌入和脱嵌锂的活性物质，例如可以选择锂氧化物、锂磷氧化物、锂硫化物或包含锂的层间化合物等含锂化合物，可以示例出锂金属复合氧化物。
构成锂金属复合氧化物的金属元素例如为选自Mg、Al、Ca、Sc、Ti、V、Cr、Mn、Fe、Co、Ni、Cu、Zn、Ga、Ge、Y、Zr、Sn、Sb、W、Pb和Bi中的至少一种。其中，可以选择选自Co、Ni、Mn和Al中的至少一种。作为适宜的锂金属复合氧化物的一个例子，可列举出含有Co、Ni和Mn的锂金属复合氧化物、含有Co、Ni和Al的锂金属复合氧化物。
第二活性材料：只要是能够吸藏、释放锂离子的材料即可。例如可列举出碳材料、锂金属、能与锂形成合金的金属或包含该金属的合金化合物等。作为碳材料，可以使用天然石墨、难石墨化性碳、人造石墨等石墨类、焦炭类等，作为合金化合物，可列举出包含至少一种能与锂形成合金的金属。作为能与锂形成合金的元素，优选为硅、锡，也可以使用这些与氧结合而成的氧化硅、氧化锡等。另外，可以使用将上述碳材料与硅、锡的化合物混合而成者。除了上述之外，还可以使用相对于钛酸锂等金属锂的充放电的电位高于碳材料等者。
电解液：非水电解质包含非水溶剂和溶解于非水溶剂中的电解质盐。非 水电解质不限定于液体电解质(非水电解液)，还可以是使用了凝胶状聚合物等的固体电解质。电解液可以是选自如下中的至少一种的混合有机溶剂：碳酸亚丙酯(PC)、碳酸亚乙酯(EC)、碳酸二乙酯(DEC)、碳酸二甲酯(DMC)、碳酸二丙酯(DPC)、二甲基亚砜、乙腈、二甲氧基乙烷、二乙氧基乙烷、四氢呋喃、N-甲基-2-吡咯烷酮(NMP)、碳酸乙甲酯(EMC)、γ-丁内酯(GBL)、氟代碳酸亚乙酯(FEC)、甲酸甲酯、甲酸乙酯、甲酸丙酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸戊酯、丙酸甲酯、丙酸乙酯和丙酸丁酯。此外，根据本发明的电解液还可以包含锂盐，并且所述锂盐的阴离子可以是选自如下中的至少一种：F-、Cl-、Br-、I-、NO 3-、N(CN) 2-、BF 4-、ClO 4-、PF 6-、(CF 3) 2PF 4-、(CF 3) 3PF 3-、(CF 3) 4PF 2-、(CF 3) 5PF-、(CF 3) 6P-、F 3SO 3-、CF 3CF 2SO 3-、(CF 3SO 2) 2N-、(FSO 2) 2N-、CF 3CF 2(CF 3) 2CO-、(CF 3SO 2) 2CH-、(SF 5) 3C-、(CF 3SO 2) 3C-、CF 3(CF 2) 7SO 3-、CF 3CO 2-、CH 3CO 2-、SCN-和(CF 3CF 2SO 2) 2N-。
下面说明本申请的电池100的装配过程：
步骤一：首先将第一极耳11弯折，将第一极耳11的一端连接在卷芯15的对应极片上，需要注意的是，第一极耳11弯折后另一端要保持与卷芯15的端面平行；
将第二极耳12弯折，将第二极耳12的一端连接在卷芯15的对应极片上，需要注意的是，第二极耳12弯折后另一端要保持与卷芯15的端面平行；
步骤二：将连接好第一极耳11和第二极耳12的卷芯15放置于容纳腔40内部，并通过激光焊接或电阻焊接，将第二极耳12与下壳体20焊接。
通过激光焊接或电阻焊接，将第一极耳11与第一导电件30焊接。
步骤三：将第二导电件50与第一导电件30之间涂覆绝缘胶，将二者粘合起来，然后放入烤箱烘烤。
步骤四：将粘合固定的第一导电件30和第二导电件50放置在下壳体上，通过第二导电件50和下壳体之间的缝隙将电解液注入下壳体20内部。并通过激光焊接或者电阻焊接将第二导电件50焊接在下壳体20上，完成电池100的装配。
步骤五：对上述电池100进行电性能测试。
本申请实施例中，通过先将第一导电件30和第二导电件50通过绝缘胶粘结、烘烤固定，再将其对应放置在下壳体20上，并通过第二导电件50和 下壳体20之间的缝隙作为注液口，电解液通过第二导电件50和下壳体20之间的缝隙注入下壳体20内，随后再进行第二导电件50和下壳体20的焊接固定。一方面，无需在第一导电件30或者第二导电件50上再设置注液口，不仅简化第一导电件30和第二导电件50的结构，易于制作；第二方面与现有技术的工艺相比，无需采用封口件封盖注液口，节省了封口件的材料成本，简化制作工序，因此也不存在电池100内部压力施加在封口件上，导致封口件易于被顶起的问题。
本发明还提供一种电子设备，包括：电子设备本体和上述的电池100，电池100为电子设备本体提供电能。
其中，本发明提供的电子设备中的电池的结构与以上所述的电池的结构相同，并能带来相同或者类似的技术效果，在此不再一一赘述。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应作广义理解，例如，可以使固定连接，也可以是通过中间媒介间接相连，可以是两个元件内部的连通或者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发明中的具体含义。
在本发明的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或者暗示所指的装置或者元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。
此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非 对其限制；尽管参照前述各实施例对本发明进行了详细的说明，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发明各实施例技术方案的范围。

Claims (22)

  1. 一种电池，其特征在于，包括电极组件、下壳体、第一导电件以及第二导电件，所述下壳体顶部具有开口，所述第二导电件盖设于所述下壳体的开口，所述第二导电件和所述下壳体围成容纳腔，所述电极组件位于所述容纳腔内；
    所述第一导电件连接于所述第二导电件的朝向所述容纳腔的一侧，所述第一导电件和所述第二导电件之间设有密封层，所述密封层使所述第一导电件和所述第二导电件之间绝缘，所述第二导电件上开设有贯穿孔，所述第一导电件上至少部分结构通过所述贯穿孔暴露至所述容纳腔外。
  2. 根据权利要求1所述的电池，其特征在于，所述第一导电件包括本体和凸出于所述本体表面的凸出部，所述本体的部分区域通过所述密封层连接在所述第二导电件的朝向所述容纳腔的表面上，所述凸出部位于所述第二导电件的贯穿孔中，且所述凸出部的侧壁与所述贯穿孔的孔壁之间具有间距。
  3. 根据权利要求2所述的电池，其特征在于，所述凸出部的顶端面与所述第二导电件的顶端面齐平；或者
    所述凸出部的顶端面相对于所述电池底部的设置高度高于所述第二导电件的顶端面相对于所述电池底部的设置高度；或者
    所述凸出部的顶端面相对于所述电池底部的设置高度低于所述第二导电件的顶端面相对于所述电池底部的设置高度。
  4. 根据权利要求3所述的电池，其特征在于，所述凸出部的顶端面与所述第二导电件的顶端面的高度差范围为：-150μm～150μm。
  5. 根据权利要求2所述的电池，其特征在于，所述密封层包括位于所述贯穿孔和所述凸出部之间的隔离部，所述隔离部被夹持在所述凸出部的侧壁和所述贯穿孔的孔壁之间。
  6. 根据权利要求5所述的电池，其特征在于，所述隔离部的顶端面与所述第二导电件的顶端面之间齐平；或者
    所述隔离部的顶端面相对于所述电池底部的设置高度高于所述第二导电件的顶端面相对于所述电池底部的设置高度；或者
    所述隔离部的顶端面相对于所述电池底部的设置高度低于所述第二导电件的顶端面相对于所述电池底部的设置高度。
  7. 根据权利要求6所述的电池，其特征在于，所述隔离部的顶端面与所述第二导电件的顶端面的高度差范围为：-100μm～100μm；和/或
    所述隔离部的厚度范围为：5μm～200μm。
  8. 根据权利要求1所述的电池，其特征在于，所述密封层为绝缘胶。
  9. 根据权利要求2所述的电池，其特征在于，所述凸出部为圆台状。
  10. 根据权利要求9所述的电池，其特征在于，所述凸出部的横截面直径范围为：10μm～2000μm。
  11. 根据权利要求2所述的电池，其特征在于，所述凸出部和所述本体的厚度范围均为：2μm～300μm。
  12. 根据权利要求2所述的电池，其特征在于，所述凸出部的侧面与所述第一导电件的厚度方向平行或者具有夹角；或者
    所述凸出部与所述本体的连接位置设有倒圆角结构。
  13. 根据权利要求1-12任一项所述的电池，其特征在于，所述下壳体包括底壁和围绕所述底壁边缘的侧壁，所述侧壁的顶部和所述第二导电件的边缘部分连接。
  14. 根据权利要求13所述的电池，其特征在于，所述第二导电件的靠边缘位置具有定位凹槽，所述定位凹槽位于所述第二导电件的朝向所述电极组件的表面上，所述侧壁的顶端与所述定位凹槽连接。
  15. 根据权利要求14所述的电池，其特征在于，所述定位凹槽的槽深为：0.05mm～0.1mm。
  16. 根据权利要求14所述的电池，其特征在于，所述定位凹槽延伸至所述第二导电件的边缘侧面，所述定位凹槽的槽底和槽壁之间形成第一倒角结构，所述第一倒角结构的角度范围为：5°～90°。
  17. 根据权利要求13所述的电池，其特征在于，所述下壳体的侧壁和底壁的连接位置处设置第二倒角结构，所述第二倒角结构的倒角范围为：5°～90°。
  18. 根据权利要求1-12任一项所述的电池，其特征在于，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第一导电件电连接，所述第二极耳和所述第二导电件电连接，
    所述第一导电件的外轮廓边缘位置设有定位标记，所述定位标记用于指示所述第一极耳在所述第一导电件上的焊接位置。
  19. 根据权利要求18所述的电池，其特征在于，所述定位标记的数量为两个，且两个所述定位标记相对于所述第一导电件的中心对称设置。
  20. 根据权利要求1-12任一项所述的电池，其特征在于，所述电极组件包括第一极耳、第二极耳、以及第一极片、第二极片和隔膜，
    所述第一极片、所述隔膜、所述第二极片依次层叠并卷绕在一起，所述第一极耳电连接在所述第一极片上，所述第二极耳电连接在所述第二极片上，
    所述第一极片的卷绕首端和卷绕尾端均具有空箔区，所述第二极片的卷绕首端和卷绕尾端均具有空箔区，
    所述第一极耳电连接在所述第一极片的卷绕尾端的空箔区，所述第二极耳电连接在所述第二极片的卷绕尾端的空箔区。
  21. 根据权利要求1-4任一项所述的电池，其特征在于，所述密封层的厚度为5μm～200μm。
  22. 一种电子设备，其特征在于，包括：电子设备本体和如权利要求1-21中任一项所述的电池，所述电池为所述电子设备本体提供电能。
PCT/CN2022/118606 2021-09-18 2022-09-14 电池及电子设备 WO2023040865A1 (zh)

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